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See detailNew geochronological history of the Mbuji-Mayi Supergroup (Proterozoic, DRC) through U-Pb and Sm-Nd dating
François, Camille ULg; Kabamba Baludikay, Blaise ULg; Storme, Jean-Yves et al

in European Geosciences Union General Assembly 2016 Vienna, Austria, 2016 (2016)

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See detailBridging familiarity and novelty detection: a matter of timing?
Delhaye, Emma ULg; Barbeau, Emmanuel; Moulin, Christopher et al

in Proceedings of the 6th International Conference on Memory (2016)

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See detailDeterminants of rice production in remote areas of Vietnam: a case study in Lao Cai province
Bui Thi Lam, ULg; Lebailly, Philippe ULg; Tran Huu, Cuong

in Vietnam National University of Agriculture (VNUA); Académie de Recherche et d'Enseignement Supérieur (ARES) (Eds.) Proceedings International Conference "Agriculture Development in the Context of International Integration: Opportunities and Challenges". December 7-8, Hanoi, Vietnam (2016)

Seng Cu rice, a special product in the Northwestern region of Vietnam, provides high economic value and it is one of the main crops for poverty reduction and rural development. Lao Cai, a moutainous ... [more ▼]

Seng Cu rice, a special product in the Northwestern region of Vietnam, provides high economic value and it is one of the main crops for poverty reduction and rural development. Lao Cai, a moutainous province, has various natural advantages for growing Seng Cu rice such as soil, climate, water resource and so on. However, Seng Cu rice production are facing with several challenges including: (i) low investment; (ii) poor farming practices; (iii) weak linkages between farmers and input/output suppliers; (iv) lack of supporting services regarding to agricultural extension and technology; (v) poor economic infrastructure. The main reasons mentioned above caused to low productivity produced at 60% of the potential, low income and high poverty rate at 50%, especially in upland communes the province. Besides, smallholder farmers have high levels of food insecurity and unsustainable livelihood. This paper aims to review the reasons why smallholder farmers in the region fail to plant Seng Cu rice. Then, various recommendations will be proposed to increase productivity and price for smallholders to improve incomes and living standard for the local farmers. [less ▲]

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See detailThermal and visual comfort under different trees cover in urban spaces at Constantine city centre - hot and dry climate
LOUAFI BELLARA, Samira; ABDOU, Saliha; Reiter, Sigrid ULg

in Proceedings of the International Conference PLEA 2016 : "Cities, Buildings, People: Towards Regenerative Environments" (2016)

In urban environments, vegetated spaces have proven to act as ameliorating factors of some climatic features related to heat stress, reducing their effects and providing comfortable outdoor settings for ... [more ▼]

In urban environments, vegetated spaces have proven to act as ameliorating factors of some climatic features related to heat stress, reducing their effects and providing comfortable outdoor settings for people. The consideration of the thermal and visual outdoor conditions in cities is increasingly important for the well-being of man and the use of public spaces. Tree shaded areas can reduce the heat effect by amelioration of microclimate and human outdoor thermal comfort. The objective of this research is to investigate thermal and visual comfort and perception in tree shaded area in open urban spaces and to compare the performance of areas shaded by different types of tree coverage, including an open area without vegetation, located in a hot and dry climate. The methodology is based on a combination of an investigation conducted by structured interview, microclimate measurement. Measurements of air temperature, air humidity, wind speed, solar global radiation, luminance and the sky view factor combined with comfort surveys were performed during summer in different areas in the city center of Constantine in Algeria (a hot and dry climate). The results indicate that the percentage of tree coverage of a space is a highly important metric to assess outdoor comfort in a hot-dry climate and that it influences mainly the use of outdoor recreational areas. Dense vegetation cover optimises the microclimatic environment for pedestrians' thermal and visual comfort in urban spaces, under these climatic conditions. [less ▲]

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See detailAn investigation of inland water soundscapes: Which sonic sources influence acoustic levels?
Bolgan, Marta ULg; O' Brien, Joanne; Winfield, Ian J. et al

in Proceedings of meetings on acoustics Acoustical Society of America 27(1) (2016)

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See detailPerformance of the chicken contract farming and its affecting factors in Vietnam: a case study in Hoa Thach Commune, Quoc Oai District, Hanoi
Bui Thi, Nga; Lebailly, Philippe ULg

in Vietnam National University of Agriculture (VNUA); Académie de Recherche et d'Enseignement Supérieur (ARES) (Eds.) Proceedings International Conference "Agriculture Development in the Context of International Integration: Opportunities and Challenges". December 7-8, Hanoi, Vietnam (2016)

This study aims to analyze the performance and its affecting factors in the chicken contract farming in a case study of Hoa Thach commune, Quoc Oai province, Hanoi, based on the questionnaire surveyed ... [more ▼]

This study aims to analyze the performance and its affecting factors in the chicken contract farming in a case study of Hoa Thach commune, Quoc Oai province, Hanoi, based on the questionnaire surveyed data of 40 representative chicken contract farmers in the study site in 2016. The results showed that surveyed household’s head was medium (37 years old), low educational level (80% secondary school), but they had experience (87.5% had more than 3 years of raising), with quite large raising scale (popular 3001 to 5000 heads). Feed cost was too high (87.7% total cost), led farmers to lower performance, and situation of depending on the market. The farm income was rather low, accounted for only 10.4% total revenue. Results also showed that, any decrease in labor cost, improvement in by - products revenue or egg laying rate will lead to the enhancement of chicken raising performance for contract farmers. Therefore, the farmers had better reduced the feed cost, better manage their labor, exploit by- products and improve the egg laying rate to enhance the farm performance. [less ▲]

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See detailContract farming application in the Vietnamese shrimp value chain
Ho, T. M. H.; Burny, Philippe ULg

in Petropoulos, D.; Kyriazopoulos, G. (Eds.) 2nd International Conference of Development and Economy (ICODECON) 9-12 June 2016 : book of abstracts (2016)

Shrimp value chain in Vietnam functions with a large number of farmers. They stayed in the weakest position in the chain due to their small individual scale with an average land of about 0.5 ha/farm, and ... [more ▼]

Shrimp value chain in Vietnam functions with a large number of farmers. They stayed in the weakest position in the chain due to their small individual scale with an average land of about 0.5 ha/farm, and low skills [1]. As a leader and holding the strongest power in the shrimp value chain, the processors determine shrimp prices and set up requirements of shrimp quality and size in the market though quality control has not been completely implemented due to the limitations of financial capital, knowledge, awareness, as well as the quality of raw material supplied by collectors and farmers. In order to help the shrimp sector working more efficiently, the Vietnamese government brought together shrimp farmers and plant processors through a farming contract. Two years after this application, the contract farming model failed due to the floor price mechanism, risk sharing, small scale of the model while there are excess suppliers in the market, administrative misconception and inefficient public management. As a result, farmers still stay at the weakest position and the shrimp sector could not improve its product safety to adapt the requirement of import markets. The study results recommend necessarily a planning and projection of shrimp production zones, re-organizing shrimp farmers into legal teams or groups or cooperatives to increase the size of the existing shrimp cultivation units in Vietnam. [less ▲]

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See detailIs the venice lagoon noisy? First passive listening monitoring of the venice lagoon: Possible effects on the typical fish community
Bolgan, Marta ULg; Picciulin, Marta; Codarin, Antonio et al

in Advances in Experimental Medicine and Biology (2016)

Three passive listening surveys have been carried out in two of the three Venice lagoon tide inlets and inside the Venice island. The spectral content and the intensity level of the underwater noise as ... [more ▼]

Three passive listening surveys have been carried out in two of the three Venice lagoon tide inlets and inside the Venice island. The spectral content and the intensity level of the underwater noise as well as the presence or absence of Sciaena umbra and the distribution of its different sound patterns have been investigated in all the recording sites. The passive listening proved to be successful in detecting S. umbra drumming sounds in both Venice lagoon tide inlets. Our results indicate that the spectral content and the level of underwater noise pollution in the Venice lagoon could affect fish acoustic communication. © Springer Science+Business Media New York 2016. [less ▲]

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See detailTime-Varying Modal Parameters Identification in the Modal Domain
Bertha, Mathieu ULg; Golinval, Jean-Claude ULg

in Proceedings of ISMA 2016 - International Conference on Noise and Vibration Engineering (2016)

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See detailIntegrating Social Aspect into Sustainability Assessment of Bio-Based Industries: Towards a Systemic Approach
Rafiaani, P.; Van Passel, S.; Lebailly, Philippe ULg et al

in Ban, Marko et al. (Ed.) 11th Conference on Sustainable Development of Energy, Water and Environment Systems : book of abstracts (2016)

Biobased industries require to be assessed on their positive and negative impacts on sustainable development. However, social factors are usually neglected in the majority of impact assessments of ... [more ▼]

Biobased industries require to be assessed on their positive and negative impacts on sustainable development. However, social factors are usually neglected in the majority of impact assessments of biobased industries: they are mainly focused on environmental performance and (techno)- economic assessments. This review proposes a new systemic approach for assessing and integrating the social dimension into sustainability assessments of biobased industries. First the main methodologies for assessing social impacts in biobased industries are compared. Social Life Cycle Analysis (SLCA) is considered to have promising methodological attributes for biobased industries’ social sustainability assessment, although it is still in its early steps of development. Second, a new systemic framework was developed following the four main iterative steps of an SLCA framework and based on three useful SLCA-based approaches including Product Social Impact Assessment; Prosuite and the UNEP SETAC Guidelines for SLCA of Products. The proposed framework allows incorporating the social impacts into a techno economic assessments (TEA) model through providing both a final social score and separate scores for each indicator category and life cycle phase. The result of this study particularly highlights the importance of considering social issues in biobased industries’design and innovation. Using the proposed systemic approach, industry and policy makers gain a better insight into the full sustainability performance (i.e. including social aspects) of biobased industries. [less ▲]

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See detailAn integrated framework for forecasting travel behavior using Markov Chain Monte-Carlo simulation and profile Hidden Markov Models
Saadi, Ismaïl ULg; El Saeid Mustafa, Ahmed Mohamed ULg; Teller, Jacques ULg et al

in Proceedings of the 95th Annual Meeting of the Transportation Research Board (2016)

Recent advances in agent-based micro-simulation modelling have further underlined the importance of a thorough full synthetic population procedure to guarantee a correct characterization of the true ... [more ▼]

Recent advances in agent-based micro-simulation modelling have further underlined the importance of a thorough full synthetic population procedure to guarantee a correct characterization of the true population. We propose an integrated approach including Markov Chain Monte Carlo (MCMC) simulation and profiling based methods to catch the complexity and the diversity of agents of the true population through representative micro samples. The population synthesis method is capable of building the joint distribution of a given population with its corresponding marginal distributions (e.g. age, gender, socio-professional status etc.) using complete, partial conditional probabilities or both of them at the same time. Particularly, the estimation of socio-demographic variables and characterization of daily activity-travel patterns are included within the framework. Data stemming from the 2010 Belgian Household Daily Travel Survey (BELDAM) are used to calibrate the modelling framework. We illustrate that this framework catches in an efficient way the behavioral heterogeneity of travelers. Furthermore, we show that the proposed framework is adequately adapted to build large scale micro-simulation scenarios of transportation and urban systems. [less ▲]

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See detailNoWaste: waste heat re-use for greener truck
Bettoja, Federica; Perosino, Andrea; Lemort, Vincent ULg et al

in Proceedings of 6th Transport Research Arena (2016)

The present paper summarizes the key points of the European NoWaste Project, which aims at developing Rankine cycle systems for integration into long-haul trucks with the aim to convert the waste heat of ... [more ▼]

The present paper summarizes the key points of the European NoWaste Project, which aims at developing Rankine cycle systems for integration into long-haul trucks with the aim to convert the waste heat of the exhaust gases into useful energy usable in mechanical or electrical form. The first part of the paper describes the ORC system architectures defined for two different truck engines: one with EGR and the other one without EGR. For both engines, different cycle configurations and working fluids are compared in terms of energy performance and technical constraints. For both ORC systems, the paper shows the final technical choices made in terms of main components: boiler, condenser, expander and pump. The second part of the paper presents preliminary experimental results carried out on demonstrators of the two ORC systems. The objectives of these tests were to check the performance announced by the components’ manufacturers. Finally, the last part of the paper compares the cost of both systems. [less ▲]

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See detailLes Lannoy, Lalaing, Croÿ, Luxembourg. Des lignages curiaux bourguignons devant la mort (XVe–XVIe s.)
Marchandisse, Alain ULg

in Andenmatten, Bernard; Pibiri, Eva (Eds.) Mourir à la cour. Normes, usages et contingences funéraires dans les milieux curiaux à la fin du Moyen Âge et à l’époque moderne (2016)

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See detailPerino del Vaga maestro di Marcello Venusti
Geremicca, Antonio ULg

in Agosti, Barbara; Leone, Giorgio (Eds.) Intorno a Marcello Venusti (2016)

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See detailÉvaluation des impacts économiques indirects selon un scénario de risque d’inondation
Saadi, Ismaïl ULg; El Saeid Mustafa, Ahmed Mohamed ULg; Teller, Jacques ULg et al

in Recueil des articles des 34èmes Rencontres Universitaires de Génie Civil de l'AUGC (2016)

In this paper, we propose an integrated framework to estimate the indirect economic impact due to flood risk in Belgium. By taking into account the land-use change and different scenarios of climate ... [more ▼]

In this paper, we propose an integrated framework to estimate the indirect economic impact due to flood risk in Belgium. By taking into account the land-use change and different scenarios of climate change, the economic impact can be estimated at the micro-scale level using an Input-Output (I-O) approach. I-O is an econometric model that represents the structure of an economy in the form of a Production-Consumption (P-C) matrix. From a physical point of view, it corresponds to commodity flows between different sectors classified according to the NACE code. This approach is implemented to describe and to better understand the propagation of higher order damage through the entire economic structure. This tool can be used to take strategic decisions in the case of transport and land-use policies within vulnerable areas. [less ▲]

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See detailContract Farming as a Determinant of Promoting Tea Marketing Channel for Small Producers in Phu Tho Province
Le Thi Kim, Oanh ULg; Vu Dinh, Ton; Tran Huu, Cuong et al

in Global Business Research Journals (GBRJ) (Ed.) Proceedings of the Doctoral Research Conference in Business Studies & Management Sciences (2016)

Making contracts between farmers and firms (contract farming, for short) plays an important role in establishing access to the agricultural markets for the small producers, especially in the developing ... [more ▼]

Making contracts between farmers and firms (contract farming, for short) plays an important role in establishing access to the agricultural markets for the small producers, especially in the developing and less developed countries. It is argued that contract farming provides farmers with the assured sale of their crops and agro-business firms with a steady supply of agricultural products required by the market. This paper focuses on analyzing benefits of tea producers through signing contract with firms. By using relevant research methods of verifying studying areas, making Participatory Rural Appraisal (PRA), and surveying farmers, the paper finds that although contract farmers receive lower fresh tea price in compared with the price received by non-contract farmers, they would have higher price stability and are provided with market guarantee mechanism. These benefits are really important in context of globalization and market liberalization with the demand for high quality and high value products. It is highly recommended that small farmers therefore should participate in the coordination model between farmers and firms in the process of tea production and marketing in Phu Tho Province, Vietnam. [less ▲]

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See detailThe impact of preexisting semantic integration on associative memory in normal aging
Bastin, Christine ULg

in Proceedings of the 6th International Conference on Memory (2016)

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See detailTowards an “integrated conservation” : the contribution of R.M. Lemaire and Piero Gazzola during the first decade of ICOMOS (1965-1975)
Houbart, Claudine ULg

in Szmygin, Bogusław (Ed.) 'HERITAGE IN TRANSFORMATION. HERITAGE PROTECTION IN THE 21ST CENTURY - PROBLEMS, CHALLENGES, PREDICTIONS' (2016)

Respectively elected first President and first Secretary General during the first general assembly of ICOMOS in Cracow in 1965, Piero Gazzola and Raymond M. Lemaire have deeply contributed to the success ... [more ▼]

Respectively elected first President and first Secretary General during the first general assembly of ICOMOS in Cracow in 1965, Piero Gazzola and Raymond M. Lemaire have deeply contributed to the success of the newly born organisation. During the first years, they didn’t only provoke the creation of numerous national committees around the world, but they also positioned ICOMOS as a major actor of the international conservation scene, through the organisation of conferences and an active participation in the debates initiated by Unesco and the Council of Europe, for which ICOMOS acted as a consultant. The study of Raymond M. Lemaire’s archive, kept at the KU Leuven in Belgium, clearly shows that one of the major concerns of both Lemaire and Gazzola, who had been, in 1964, amongst the main authors of the Venice Charter, was to broaden the scope of the document in order to address the issue of pre-industrial city centres, threatened by late reconstruction or development projects mostly promoting functionalist approaches. Depending on the time available, this presentation will address one or various aspects of Lemaire’s and Gazzola’s contribution to the emergence of integrated conservation, consecrated by the European Charter and the Amsterdam Declaration of 1975, that is: the new ideas (social value of heritage for example) developed during the expert meetings organised by the Council of Europe in 1965-1968, where they both represented ICOMOS. These ideas are synthesised in the report “Saving the face of Europe” in 1973, the relation between these theoretical contributions and Lemaire and Gazzola’s contemporary field experience, the role of Eastern Europe experiences (D. Libal in Prague and M. Horler in Budapest) in the development of an appropriate methodology to address urban issues, the differences between the concept of “integral planning” proposed by Lemaire in 1973 and the “integrated conservation” that was promoted by the 1975 Council of Europe charters, an epilogue could mention the revision projects of the Venice Charter between 1975 and 1981. Based on my PhD about R.M. Lemaire, recently presented at the KU Leuven (Belgium), this presentation aims at clarifying and illustrating the shift from monument restoration towards city “reanimation” or “rehabilitation” during the late sixties and seventies, as well as paying tribute to the action of two of the most important figures of the beginnings of ICOMOS. [less ▲]

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See detailL'appartement des bains et le cabinet des peintures du château de Fontainebleau sous le règne d'Henri IV
Fagnart, Laure ULg

in Nativel, Colette (Ed.) Henri IV. Art et pouvoir (2016)

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See detailDe l’Aurignacien au Gravettien dans le Nord-Ouest européen
Touzé, Olivier ULg

in Chirica, Vasile; Ichim, Cristian (Eds.) Les Aurignaciens. Leur création matérielle et spirituelle (2016)

The study of the Early Upper Palaeolithic in Northwestern Europe faces several difficulties associated with the qualitative and quantitative state of the documentation. These limits constrain the ... [more ▼]

The study of the Early Upper Palaeolithic in Northwestern Europe faces several difficulties associated with the qualitative and quantitative state of the documentation. These limits constrain the precision of the analyses, though the study of this period benefits from a dynamic of research based on the preventive and programmed archaeologies, and the reappraisal of old collections. Recent data and current work on several sites demonstrate that Northwestern Europe can fully contribute to the discussions on this period, and in particular to the question of the transition between the Aurignacian and the Gravettian. Thus, we propose here an overview of the period extending from the Recent Aurignacian to the Early Gravettian, in order to propose some thoughts on this pivotal phase of the Upper Palaeolithic. During this particular period, the European Northwest indeed distinguishes itself by the appearance of the Maisierian, an original lithic tradition whose technical system, devoid of elements peculiar to the Aurignacian traditions, announces the development of Gravettian norms. [less ▲]

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See detailTowards a New Design Equation for Piano Key Weirs Discharge Capacity
Bashiri Atrabi, Hamid ULg; Dewals, Benjamin ULg; Pirotton, Michel ULg et al

in Proc. of the 6th International Symposium on Hydraulic Structures (2016)

Piano Key weirs are Labyrinth like weirs which can be placed on the top of gravity dams. They represent a powerful solution to increase the discharge capacity of existing dam spillways. For proper design ... [more ▼]

Piano Key weirs are Labyrinth like weirs which can be placed on the top of gravity dams. They represent a powerful solution to increase the discharge capacity of existing dam spillways. For proper design it is necessary to accurately predict this discharge capacity. In this research, artificial neural network, multiple linear and nonlinear regressions are used to set up a new design equation for the discharge capacity of Piano Key weirs. The effect of each parameter on the discharge capacity of Piano Key weirs is tested in these models. Several non-dimensional parameters are used to define a functional relationship between the inputs and output. These parameters are built from the geometric dimensions of the structure such as weir height, inlet and outlet keys width, overhangs length, water head and side crest length. Previous experimental data, which were collected at the experimental laboratory of the research group Hydraulics in Environmental and Civil Engineering (HECE), University of Liege, are used for training and testing patterns of the models. Root mean square errors (RMSE) and coefficient of determination (R2) are used as comparing criteria for the evaluation of the models. The models’ results are compared with experimental results and other existing equations. [less ▲]

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See detailConditional expected static wind loads
Blaise, Nicolas ULg; Andrianne, Thomas ULg; Denoël, Vincent ULg

in In Vento 2016 (2016)

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See detailMethodology to model the energy vulnerability of households in Europe based on the current mapping of fuel poverty and transport poverty and its likely evolution until 2040
Pierson, Charlotte; Reiter, Sigrid ULg

in Proceedings of the Urban Transition Global Summit 2016 (2016)

Fuel poverty refers to a situation in which an individual or household is not able to meet their basic energy needs. Fuel poverty is currently growing in the European Union. Research in this field is ... [more ▼]

Fuel poverty refers to a situation in which an individual or household is not able to meet their basic energy needs. Fuel poverty is currently growing in the European Union. Research in this field is often limited to the assessment of the current risk of fuel poverty based on energy consumptions due to housing. Urban sprawl generates a significant increase in energy consumption related to daily mobility, which generates energy poverty related to transportation needs. This article presents a methodology for modeling the current and future energy poverty of households in Europe on the basis of energy consumptions due to housing, to daily mobility and their combination. Indicators for fuel poverty and transport poverty will be based on Hills’ method, which is widely recognized internationally for fuel poverty assessment and which takes into account two thresholds: energy expenses of households and their available residual income. This article will outline the spatial modeling process of energy costs due to dwellings and mobility thanks to the coupling of a GIS tool, cadastral datasets, existing methods for the assessment of buildings and transport energy consumptions and updated databases (EPB certificates, detailed mobility surveys, data from smart meters, mobile phones and GPS). Different scenarios will be selected to predict the evolution of fuel and transport poverty until 2040 on the basis of national and European prospective studies or, alternatively, based on the historical evaluation of some key parameters and their extrapolation. The evolution of built-up areas will be model thanks to the multinomial logistic regression model (MLR) that enables to visualize the consequence of different urban densities expansion. The different parameters that will influence the evolution of fuel and transport poverty until 2040 will be highlighted (climate change, urban expansion, fuel prices, energy performance of buildings and vehicles, etc.). [less ▲]

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See detailWater retention behaviour of compacted bentonites: experimental observations and constitutive model
Dieudonné, Anne-Catherine ULg; Gatabin, Claude; Talandier, Jean et al

in Delage, Pierre; Cui, Yu-Jun; Ghabezloo (Eds.) et al 3rd European Conference on Unsaturated Soils – “E-UNSAT 2016” (2016)

Bentonite-based materials are studied as potential barriers for the geological disposal of radioactive waste. In this context, the hydro-mechanical behaviour of the engineered barrier is first ... [more ▼]

Bentonite-based materials are studied as potential barriers for the geological disposal of radioactive waste. In this context, the hydro-mechanical behaviour of the engineered barrier is first characterized by free swelling conditions followed by constant volume conditions. This paper presents an experimental study conducted in order to characterize the water retention behaviour of a compacted MX-80 bentonite/sand mixture. Then, based on observations of the material double structure and the water retention mechanisms in compacted bentonites, a new water retention model is proposed. The model considers adsorbed water in the microstructure and capillary water in the aggregate-porosity. The model is calibrated and validated against the experimental data. It is used for better understanding competing effects between volume change and water uptake observed during hydration under free swelling conditions. [less ▲]

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See detailPresentazione del Tesoro dei Lessici degli Antichi Volgari Italiani (TLAVI)
Aresti, Alessandro ULg

in Bozzi, Andrea; Fairon, Cédric; Trotter, David (Eds.) Actes du XXVIIe Congrès international de linguistique et de philologie romanes (Nancy, 15-20 juillet 2013). Section 16 : Projets en cours ; ressources et outils nouveaux. Nancy, ATILF (2016)

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See detail: « Les aventures de Leo Frobenius au Congo » : l’histoire d’une expédition ethnographique et de ses suites judiciaires, à la lumière des archives coloniales
Braillon, Charlotte ULg

in Leo Frobenius : histoire croisée de la constitution et de l'approche d'un savoir ethnologique en France et en Allemagne. Actes du colloque des 19 -20 février 2014 à la Goethe-Universität (2016)

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See detailStockage de chaleur en aquifère et flexibilité de la demande électrique: quelles possibilités?
Paulus, Claire; Bolly, Pierre-Yves; Hermans, Thomas ULg et al

in Proceedings des 34e rencontres universitaires du Génie Civil de l'AUGC (2016)

In the context of energy demand side management (EDSM) and heat storage in aquifers, the design and functioning of aquifer thermal energy storage (ATES) systems have strong interconnections with the ... [more ▼]

In the context of energy demand side management (EDSM) and heat storage in aquifers, the design and functioning of aquifer thermal energy storage (ATES) systems have strong interconnections with the geology of the site which may be complex and heterogeneous, making predictions difficult. In this context, we developed a subsurface monitoring methodology to better characterize heat transfer in the subsurface with the help of 4D electrical resistivity tomography (ERT), multiple hydrological measurements in wells, and a short-term heat storage experiment conducted for the purpose in a confined alluvial aquifer. Results clearly show the ability of ERT to delimit the thermal plume growth during injection, the diffusion and decrease of temperature during storage, and the decrease in size after heat recovery. Energy balance shows that up to 70% of the energy can be easily recovered with an adapted strategy in the context of DSM. Short-term heat storage in alluvial aquifer is efficient and ERT is a valuable tool to image and estimate the temperature distribution in the subsurface. [less ▲]

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See detailIrrigated food systems in Maradi, Republic of Niger: a comparison between operating accounts
Andres, Ludovic ULg; Dambo, Sambo; Baboussouna, Awal et al

in Kovacevic, Dusan (Ed.) VII International Scientific Agriculture Symposium “AGROSYM 2016”, Jahorina, October 06-09, 2016 : book of proceedings (2016)

In Niger, most food systems are based on pluvial crops (millet, sorghum and cowpea).However, during the last decade, agricultural policy and technical and financial partners focused on increasing the ... [more ▼]

In Niger, most food systems are based on pluvial crops (millet, sorghum and cowpea).However, during the last decade, agricultural policy and technical and financial partners focused on increasing the productivity of irrigated food products. The region of Maradi, located in the Centre-South of Niger, is an area traditionally dedicated to agriculture. Some parts of this region are particularly adapted for irrigation, especially the Goulbi of Kaba and the Goulbi of Maradi valleys. The goal of this study is to establish the socio-economic situation of the main irrigated food productions, based on the following indicators: (i) the crop management technics used; (ii) the results of the operating account; and (iii) the comparison between the village and the adoption of new technic (farmer field school). This paper is based on direct surveys conducted in three areas of the Maradi’s region: Soumarana (commune of Safo, department of Madarounfa); N’Yelwa (commune of Madarounfa, department of Madarounfa); Madarounfa (commune of Madarounfa, department of Guidan Roumdji). The software used is Minitab and Excel. The results highlighta good perspective for the irrigation system but this food system is conditioned by the petroleum price and some other input (fertilizer and seed). The operating accounts show that irrigation is a non-negligible income source, which increases the resilience of the farmers. [less ▲]

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See detailImpact of the new Common Agricultural Policy (2015-2020) on the value of direct payments and on farmers’ income in Wallonia (South of Belgium)
Burny, Philippe ULg; Terrones Gavira, François ULg

in Kyriazopoulos, G.; Petropoulos, D. (Eds.) 1st International Conference of Development and Economy (ICODECON) 2-4 October 2015: The advantages and disadvantages of Economic Crises: Conference proceedings (2016)

A new Common Agricultural Policy was defined in 2013, with a new structure for direct payment. In Wallonia, the government implemented the following scheme: 30% for the green payment, 29.9% for the basic ... [more ▼]

A new Common Agricultural Policy was defined in 2013, with a new structure for direct payment. In Wallonia, the government implemented the following scheme: 30% for the green payment, 29.9% for the basic payment, 17% for the additional payment for the first 30 ha, 1.8% for young farmers and 21.3% for couple payments. Due to convergence, the mean support through direct payments will decline from 21,900 € in 2014 to 19,283 € in 2019. The number of losers will be equivalent to the number of gainers. Regions where cereals and sugar beet are produced will lose the most, where the region suitable for cattle raising will gain somewhat. There will be a better distribution of direct payments among farmers: the Gini index will decline from 0.55 to 0.49. The highest negative impact on income will occur for the specialties “green crops”, “crops and dairy cattle” and “crops and non-dairy cattle”: the least negative impact will be observed within the specialties “dairy cattle”, “meat cattle” and “dairy and meat cattle”. The reform will be more profitable for the farms from 30 to 50 ha and will mainly impact the largest farms. Finally, the CAP reform implemented in Wallonia guarantees a smooth evolution to 2020. [less ▲]

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See detailInfluence de la fraction granulaire et de l'origine des granulats recyclés sur leurs propriétés
Zhao, Zengfeng ULg; Courard, Luc ULg; Michel, Frédéric ULg et al

in Courard, Luc; Collin, Frédéric; Cerfontaine, Benjamin (Eds.) RUGC 2016 (2016)

De très grandes quantités de déchets de construction et de démolition sont produites chaque année. Afin de faire bon usage des granulats recyclés (GR) dans le béton, il est très important d’étudier ... [more ▼]

De très grandes quantités de déchets de construction et de démolition sont produites chaque année. Afin de faire bon usage des granulats recyclés (GR) dans le béton, il est très important d’étudier l’influence de la fraction granulaire et de l’origine des granulats recyclés sur leurs propriétés. Dans cette étude, les granulats recyclés de blocs (GR_Blocs) et de hourdis (GR_Hourdis) ont été concassés et puis séparés en 4 fractions granulaires (0/2, 2/6,3, 6,3/14, 14/20mm). Chaque fraction granulaire des GR a été caractérisée. Les résultats montrent que la teneur en pâte de ciment durcie des GR augmente lorsque la taille des particules diminue. Les sables recyclés possèdent ainsi des teneurs en pâte de ciment nettement plus élevées que les gravillons recyclés. Les sables recyclés possèdent en particulier un coefficient d’absorption d’eau très élevé par rapport aux gravillons recyclés. Les valeurs de teneur en pâte de ciment durcie obtenues pour les GR_Blocs sont plus faibles que celles mesurées sur les GR_Hourdis, ce qui provient d’une plus faible quantité de pâte de ciment initiale du bloc. Les résultats montrent que pour toutes les fractions des GR, les GR_Hourdis sont plus anguleux que les GR_Blocs. [less ▲]

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See detailLes aspects financiers du contrat d'entreprise. Questions choisies
Kohl, Benoît ULg

in Kohl, Benoît (Ed.) Droit de la construction (2016)

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See detailSocial Life Cycle Assessment in Biobased Industries: Identifying Main Indicators and Impacts
Rafiaani, Parisa; Van Passel, Steven; Lebailly, Philippe ULg et al

in Benoit Norris, Catherine; Norris, Gregory (Eds.) 5th International Social LCA Conference Harvard, Cambridge, USA, June 13 - 15, 2016: book of abstracts (2016)

Assessing social impacts of various products, services and human activities has achieved an increasing interest worldwide. The nature of sustainability of biobased industries from a social point of view ... [more ▼]

Assessing social impacts of various products, services and human activities has achieved an increasing interest worldwide. The nature of sustainability of biobased industries from a social point of view is how and to what extent they are perceived by society, and how various societies take advantages from such activities. However, an important issue is that social factors are not usually easy to be quantitatively analyzed and although the social impacts might be very remarkable, especially at the local scale, they have been not possible to be investigated in the majority of impact evaluations in the past. Despite the existence of many different methodologies towards Social Life Cycle Assessment (SLCA) to address social impacts of various businesses and industries, most of them impartially address social performances of an industry. The aim of this paper is to highlight the main criteria that need to be taken into account in SLCA approaches for identifying the social indicators and impacts of biobased industries that is a timely topic worldwide toward climate change mitigation goals. Accordingly, considering the general approach of SLCA and particularly its inventory analysis phase for impact categories and indicator determinations, the paper provides an overview of the existing guidelines and frameworks for identifying social indicators and impact categories associated with bio-industries. In conclusion, main impact categories and indicators formulated in the existing frameworks applied to biobased industries are demonstrated as a basic set of applicable elements of social dimensions in evaluating bio-industries’ sustainability when conducting SLCAs. The state of the art for this study mainly includes leading journal articles, international reports and conference papers up to and including 2016 on SLCA in biobased industries. According to the reviewed frameworks in this study, quantitative, midpoint and site-specific data are the main elements taken into account when collecting the data for biobased product social impact assessment. This study also reveals that although SLCA is in its early steps of development and despite in numerous cases, conducting a comprehensive SLCA is not yet feasible, it has been considered to have substantially promising methodological attributes that can help policymakers and other stakeholders to quantify and assess sustainability of bio-industries from the social perspective. Recommendations for further research work concerning SLCA in bio-industries are also presented. [less ▲]

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See detailFranz Thedieck (1900-1995) und das Verhältnis zwischen Wissenschaft und Politik "von Weimar nach Bonn": eine biographische Annäherung
Brüll, Christoph ULg

in Thomes, Paul (Ed.) Von der Narration zur Methode. Neue Impulse in der historischen Biographieforschung (2016)

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See detailLaBGen-P: A Pixel-Level Stationary Background Generation Method Based on LaBGen
Laugraud, Benjamin ULg; Pierard, Sébastien ULg; Van Droogenbroeck, Marc ULg

in 2016 International Conference on Pattern Recognition Contest Proceedings (2016)

Estimating the stationary background of a video sequence is useful in many applications like surveillance, segmentation, compression, inpainting, privacy protection, and computational photography. To ... [more ▼]

Estimating the stationary background of a video sequence is useful in many applications like surveillance, segmentation, compression, inpainting, privacy protection, and computational photography. To perform this task, we introduce the LaBGen-P method based on the principles of LaBGen and the conclusions drawn in the corresponding paper. It combines a pixel-wise median filter and a pixel selection mechanism based on a motion detection performed by the frame difference algorithm. By working with pixels instead of patches, as originally done in LaBGen, it avoids some discontinuities between different spatial areas and generates better visual results. In this paper, we describe the LaBGen-P method, study its performance on the sequences of the SBMnet dataset, and compare it to that of LaBGen and other methods on the same dataset. Both algorithms emerged as the best ones during the IEEE Scene Background Modeling Contest (SBMC) organized in 2016. However, as there is not yet a good understanding of the recommended metrics, and due to the small amount of video sequences provided with the corresponding ground truth, we have performed a subjective evaluation. More precisely, 35 human experts were asked to compare background images estimated by LaBGen-P and LaBGen, and select the best one. From these experiments, it turns out that the results of LaBGen-P are preferred for about two thirds of the video sequences. Note that we provide an open-source C++ implementation at http://www.telecom.ulg.ac.be/labgen. [less ▲]

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See detailDifférents manomètres pour améliorer la ventilation au masque et ballon
RIGO, Vincent ULg; Kreins, Nathalie; Eiras da Silva, Sandra et al

in Baud, Olivier; Saliba, Elie (Eds.) Congrès SFN-JFRN 2016, livre des communications (2015, December 17)

INTRODUCTION Les pressions employées lors de la ventilation au ballon sont difficiles à évaluer et souvent inadéquates. Les ballons disposent d’un connecteur où brancher un manomètre (manom) à ressort ou ... [more ▼]

INTRODUCTION Les pressions employées lors de la ventilation au ballon sont difficiles à évaluer et souvent inadéquates. Les ballons disposent d’un connecteur où brancher un manomètre (manom) à ressort ou une ligne vers un manom à cadran. Cependant, l’addition d’une variable à surveiller pourrait constituer une interférence et majorer le risque de fuite ou de rythme ventilatoire inadéquat. Cette étude évalue l’influence de manom simples sur la qualité de la ventilation. MÉTHODES Les participants aux Journées Belges de Pédiatrie pouvaient ventiler un mannequin aux voies respiratoires étanches avec un capteur de débit trachéal. Une pression de 25 mbar et une fréquence de 40 à 60/’ étaient visées. Une séquence de 45’’ avec un manom à ressort (R), une séquence avec un manom à cadran (C) et une sans (O) étaient réalisées dans un ordre aléatoire. La pression de pointe du ballon (P), le volume inspiratoire (VTi), et la fréquence de ventilation (FR) de chaque insufflation ont été analysées. La fuite autour du masque fut estimée en comparant VTi à un volume théorique dérivé d’une calibration avec masque scellé. RÉSULTATS Cinq néonatologues (Néo), 15 pédiatres et 11 internes ont réalisé 5279 insufflations. Les P obtenues avec un manom étaient plus élevées (O:176 mbar; R:184 mbar*; C:194 mbar*#) [*p<.05 vs O; #:p<.05 vs R] VTi augmentait légèrement (O:31 ml; R:3.11 ml*; C:3.21 ml*) FR était systématiquement trop élevé (77-82 bpm). L’usage d’un manom ne modifiait pas les paramètres pour les internes. Pour les Néo, ajouter un manom améliorait P, VTi et la fuite (P -O: 167 mbar; R and C: 204 mbar*) Sur les premières séquences de ventilation, le manom améliorait les paramètres (P-O: 124 mbar;R: 163 mbar*; C: 204 mbar*#), (VTi-O:21 ml; R:30.8 ml*; C:3.31 ml*#), (Fuite-O: 3816%; R: 2712%*; C: 3413%*#). CONCLUSIONS La ventilation au ballon reste difficile. Les pressions obtenues étaient éloignées de l’objectif, et le rythme souvent trop élevé. Si le manomètre permet d’améliorer les pressions et volumes obtenus, surtout en cas de ventilation sans feed-back préalable, cet effet bénéfique s’observe surtout pour les opérateurs expérimentés. Enfin, un congrès scientifique permet de recruter une population variée pour une étude de simulation simple. [less ▲]

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See detailImitative Learning for Online Planning in Microgrids
Aittahar, Samy ULg; François-Lavet, Vincent ULg; Lodeweyckx, Stefan et al

in Woon, Wei Lee; Zeyar, Aung; Stuart, Madnick (Eds.) Data Analytics for Renewable Energy Integration (2015, December 15)

This paper aims to design an algorithm dedicated to operational planning for microgrids in the challenging case where the scenarios of production and consumption are not known in advance. Using expert ... [more ▼]

This paper aims to design an algorithm dedicated to operational planning for microgrids in the challenging case where the scenarios of production and consumption are not known in advance. Using expert knowledge obtained from solving a family of linear programs, we build a learning set for training a decision-making agent. The empirical performances in terms of Levelized Energy Cost (LEC) of the obtained agent are compared to the expert performances obtained in the case where the scenarios are known in advance. Preliminary results are promising. [less ▲]

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See detailLa renonciation, l'abdication et la rupture du contrat de travail
Kéfer, Fabienne ULg

in La rupture du contrat de travail : entre harmonisation et discrimination (2015, December 04)

L’étude, limitée au contexte de la dissolution du contrat de travail, aborde, dans une première partie, la possibilité pour les parties au contrat de travail de renoncer au bénéfice d’une disposition ... [more ▼]

L’étude, limitée au contexte de la dissolution du contrat de travail, aborde, dans une première partie, la possibilité pour les parties au contrat de travail de renoncer au bénéfice d’une disposition, possibilité liée au caractère impératif ou d’ordre de la disposition en cause. Est particulièrement étudié le lien entre le rapport de subordination et la faculté d’abdiquer un droit. Le document effectue ensuite une incursion dans la question de la preuve de la renonciation. La troisième partie passe en revue un large éventail de droits auxquels les parties pourraient être tentées de renoncer : clauses d’écolage, clauses de stabilité d’emploi, renonciation au droit d’invoquer la rupture du contrat de travail en cas d’acte équipollent à rupture ou de préavis nul, renonciation à la durée du préavis ou à l’indemnité en tenant lieu, renonciation au reclassement professionnel, aux droits découlant d’une convention collective, renonciation par un délégué du personnel, renonciation par la voie d’une convention collective, etc. Si la matière reste incertaine à bien des égards, elle est aussi en évolution, tant par l’effet de la jurisprudence que par l’action de la loi, et notamment celle du 26 décembre 2013 dite « statut unique », qui a modifié de manière sensible le champ de la licéité des renonciations au délai ou à l’indemnité compensatoire de préavis. [less ▲]

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See detailEstimation de la quantité de matière sèche ingérée par les vaches laitières au pâturage en traite robotisée, utilisation de l’analyse des fèces en spectrométrie dans le proche infrarouge
Lessire, Françoise ULg; Dufrasne, Isabelle ULg; Decruyenaere, Virginie

in Agabriel, Jacques; Boichard, Didier; Choisis, Jean-Philippe (Eds.) et al 22èmes Rencontres autour des recherches sur les ruminants. (2015, December 02)

Malgré l’intérêt nutritionnel et économique de l’herbe dans la ration des vaches laitières, le pâturage est de plus en plus délaissé en raison notamment de l’automatisation de la traite et de l’extension ... [more ▼]

Malgré l’intérêt nutritionnel et économique de l’herbe dans la ration des vaches laitières, le pâturage est de plus en plus délaissé en raison notamment de l’automatisation de la traite et de l’extension de la taille des troupeaux. Une des raisons invoquées par les éleveurs pour cet abandon est leur manque de confiance par rapport aux quantités d’herbe réellement ingérées par les animaux et la crainte que ces apports inconstants se traduisent par des fluctuations de production laitière tant qualitative que quantitative. Or Decruyenaere et al. (2009, 2012) ont développé une méthode d’estimation de la matière sèche volontairement ingérée (MSVI) par analyse des bouses par spectrométrie dans le proche infra-rouge. Cette méthode présente l’avantage d’être non invasive, facile à mettre en œuvre sur le terrain et peu onéreuse. Le but de cette étude était donc d’évaluer l’utilisation de cette méthode dans un troupeau de vaches laitières traites par un robot mobile en pâture. Le troupeau (n=53) était divisé en 2 groupes dont le niveau de complémentation journalière était différent. Lors de la traite, le groupe 1 (GR1) recevait en moyenne 2,6 kg de concentrés/vache alors que le groupe 2 (GR2) en recevait 4,2 kg/vache. L’objectif était de vérifier l’impact du niveau de complémentation sur les résultats obtenus. Des prélèvements de fèces ont été faits une fois par mois sur 10 vaches (5 vaches par groupe) pendant 4 mois. Les spectres d’absorption dans le proche infra-rouge (NIR) ont été confrontés à des étalonnages NIR permettant l’estimation de la MSVI exprimée soit par rapport au poids vif (MSVI1), soit par rapport au poids métabolique (MSVI2). Ces estimations d’ingestion ont permis le calcul de la matière sèche journalière ingérée par vache (MSI1 et MSI2). Par ailleurs, les mesures d’herbe à l’entrée et à la sortie des parcelles pâturées ont été relevées ainsi que la densité du couvert herbacé pour évaluer la quantité d’herbe disponible. A ces valeurs de biomasses disponibles ont été additionnées des quantités de concentrés distribuées lors du passage des animaux au robot. Les valeurs moyennes de matière sèche ingérée (kg/vache/jour) pour le GR1 étaient de 15,20 ± 2,60 kg MS par la MSI1 et de 16,99 ± 1,80 kg MS pour la MSI2. Pour le GR2, la MSI1moyenne était de 20,20 ± 4,95 kg MS et la MSI2 moyenne de 21,95 ± 3,36 kg MS. L’estimation de la ration disponible par vache (kg MS herbe + kg MS concentrés) était de 17,25 ± 0,73 kg MS pour le GR1 et de 18,69 ±0,83 kg MS pour le GR2. Les valeurs obtenues par l’analyse NIR sont donc compatibles avec les quantités d’herbe et de concentrés disponibles. Les valeurs estimées par les 2 méthodes étaient hautement corrélées entre elles à part en période de faible ingestion (<10 kgMS). En ce cas la MSI2 semble donner des résultats plus fiables. En conclusion, l’analyse NIR des bouses apparaît une technique intéressante pour l’estimation de la quantité d’herbe ingérée au pâturage. [less ▲]

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See detailAsteroseismic hare & hound exercises: the case of β Cephei stars
Salmon, Sébastien ULg; Montalbán, J.; Miglio, A. et al

in Martins, F.; Boissier, S.; Buat, V. (Eds.) et al SF2A-2015: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics. Eds.: F. Martins, S. Boissier, V. Buat, L. Cambrésy, P. Petit, pp.423-428 (2015, December 01)

The β Cephei pulsating stars present a unique opportunity to test and probe our knowledge of the interior of massive stars. The information that we can get depends on the quality and number of ... [more ▼]

The β Cephei pulsating stars present a unique opportunity to test and probe our knowledge of the interior of massive stars. The information that we can get depends on the quality and number of observational constraints, both seismic and classical ones. The asteroseismology of β Cephei stars proceeds by a forward approach, which can result in multiple solutions, without clear indication on the level of confidence. We seek a method to derive confidence intervals on stellar parameters and investigate how these latter behave depending on the seismic data accessible to the observer. We realise forward modelling with the help of a grid of pre-computed models. We also use Monte-Carlo simulations to build confidence intervals on the inferred stellar parameters. We apply and test this method in a series of hare and hound exercises on a subset of theoretical models simulating observed stars. Results show that a set of 5 frequencies (with knowledge of their associated angular degree) yields precise seismic constraints. Significant errors on the determination of the extent of the central mixed region may result when the theoretical models do not present the same chemical mixture as the observed star. [less ▲]

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See detailSwitch from Hashimoto Thyroiditis (HT) to Graves Basedow (GB) disease : a controlled study in a series of 15 patients
Maiga, I; BETEA, Daniela ULg; Geenen, Vincent ULg et al

in Abstract book - 20th Annual Congress of the Belgian Society of Internal Medicine (2015, December)

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See detailTowards DisNETPerf: a Distributed Internet Paths Performance Analyzer
Wassermann, Sarah ULg; Casas, Pedro; Donnet, Benoît ULg

in ACM CoNEXT Student Workshop: Heidelberg 1 décembre 2015 (2015, December)

For more than 25 years now, traceroute has demonstrated its supremacy for network-path measurement, becoming the most widely used Internet path diagnosis tool today. A major limitation of traceroute when ... [more ▼]

For more than 25 years now, traceroute has demonstrated its supremacy for network-path measurement, becoming the most widely used Internet path diagnosis tool today. A major limitation of traceroute when the destination is not controllable by the user is its inability to measure reverse paths, i.e., the path from a destination back to the source. Proposed techniques to address this issue rely on IP address spoofing, which might lead to security concerns. In this paper we introduce and evaluate DisNETPerf, a new tool for locating probes that are the closest to a distant server. Those probes are then used to collect data from the server point-of-view to the service user for path performance monitoring and troubleshooting purposes. We propose two techniques for probe location, and demonstrate that the reverse path can be measured with very high accuracy in certain scenarios. [less ▲]

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See detailFamilial thyrogastric autoimmune syndrome : a study of 22 kindreds
Sid, Sélim ULg; LUTTERI, Laurence ULg; BEGUIN, Yves ULg et al

in Abstract book - 20th Annual Congress of the Belgian Society of Internal Medicine (2015, December)

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See detailHow to Discount Deep Reinforcement Learning: Towards New Dynamic Strategies
François-Lavet, Vincent ULg; Fonteneau, Raphaël ULg; Ernst, Damien ULg

in NIPS 2015 Workshop on Deep Reinforcement Learning (2015, December)

Using deep neural nets as function approximator for reinforcement learning tasks have recently been shown to be very powerful for solving problems approaching real-world complexity. Using these results as ... [more ▼]

Using deep neural nets as function approximator for reinforcement learning tasks have recently been shown to be very powerful for solving problems approaching real-world complexity. Using these results as a benchmark, we discuss the role that the discount factor may play in the quality of the learning process of a deep Q-network (DQN). When the discount factor progressively increases up to its final value, we empirically show that it is possible to significantly reduce the number of learning steps. When used in conjunction with a varying learning rate, we empirically show that it outperforms original DQN on several experiments. We relate this phenomenon with the instabilities of neural networks when they are used in an approximate Dynamic Programming setting. We also describe the possibility to fall within a local optimum during the learning process, thus connecting our discussion with the exploration/exploitation dilemma. [less ▲]

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See detailSaint Paul 3D - Acquisition tridimensionnelle de la cathédrale via LaserScan
Hallot, Pierre ULg

in Journée d'étude organisée par l'Institut du Patrimoine Wallon et le Comité Patrimoine et Histoire de la FABI (2015, November 27)

Les nouvelles techniques LiDAR (Light Detection and Ranging) et photogrammétriques permettent d’acquérir rapidement un volume important de données 3D. Le terme LiDAR désigne tout instrument de mesure ... [more ▼]

Les nouvelles techniques LiDAR (Light Detection and Ranging) et photogrammétriques permettent d’acquérir rapidement un volume important de données 3D. Le terme LiDAR désigne tout instrument de mesure (terrestre, aéroporté) basé sur l’analyse des propriétés d’un faisceau renvoyé vers un émetteur (Poux et al. 2014). Conscient de l’énorme potentiel de ces techniques, l’Unité de Géomatique de l’Université de Liège a réalisé la numérisation de la Cathédrale Saint‐Paul de Liège. Ce projet a été initié via une collaboration avec le Matthieu Piavaux (FUNDP) et financée par le FNRS. Au‐delà des aspects de conservation et d’analyse du bâti, cette numérisation nous a permis de mettre en lumière les principes et limitations de la technique même d’acquisition de données 3D via LiDAR ainsi que ses limitations tant matérielles (sur terrain) que logicielles (traitement des données). Le jeu de donnée obtenu de la numérisation sert également de base fondamentale à un ensemble de projets de recherches (notamment via la réalisation de thèses de doctorats) visant à la segmentation automatique de nuages de points, de reconstruction d’objets tridimensionnelles, d’analyse de qualité d’ajustements. Par la suite, nous détaillons la méthodologie utilisée pour l’acquisition du nuage de points 3D ainsi que les différents principes de calage de nuages. Le chapitre suivant sera consacré à la présentation de résultats ainsi que de premiers développements en termes de segmentation automatique. Finalement, nous dresserons quelques perspectives de représentations. [less ▲]

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See detailParameter Correlation Analysis in Four Mathematical Models of Left Ventricular Relaxation
Pironet, Antoine ULg; MORIMONT, Philippe ULg; Dauby, Pierre ULg et al

in Proceedings of the IEEE-EMBS Benelux chapter 2015 meeting (2015, November 26)

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See detailCardio-pulmonary mechanics and minimal modelling in critical care
de Bournonville, Sébastien; Pironet, Antoine ULg; Desaive, Thomas ULg et al

in Proceedings of the IEEE-EMBS Benelux chapter 2015 meeting (2015, November 26)

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See detailL’Entéropathie Epizootique des lapins : passé, présent et futur
Marlier, Didier ULg

in ITAVI (Ed.) Proceedings des 16èmes journées de la recherche cunicole (2015, November 24)

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See detailA Lightweight Network Proximity Service Based On Neighborhood Models
Liao, Yongjun; Du, Wei; Leduc, Guy ULg

in 22nd IEEE Symposium on Communications and Vehicular Technology in the Benelux (SCVT) (2015, November 24)

This paper proposes a network proximity service based on the neighborhood models used in recommender systems. Unlike previous approaches, our service infers network proximity without trying to recover the ... [more ▼]

This paper proposes a network proximity service based on the neighborhood models used in recommender systems. Unlike previous approaches, our service infers network proximity without trying to recover the latency between network nodes. By asking each node to probe a number of landmark nodes which can be servers at Google, Yahoo and Facebook, etc., a simple proximity measure is computed and allows the direct ranking and rating of network nodes by their proximity to a target node. The service is thus lightweight and can be easily deployed in e.g. P2P and CDN applications. Simulations on existing datasets and experiments with a deployment over PlanetLab showed that our service achieves an accurate proximity inference that is comparable to state-of-the-art latency prediction approaches, while being much simpler. [less ▲]

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See detailDeterminants of Access to Agricultural Credits for Small Scale Farmers in the Southern Province of Rwanda
Musabanganji, Edouard ULg; Antoine, Karangwa; Lebailly, Philippe ULg

in Book of Proceedings Sixth International Scientific Agricultural Symposium "AgroSym 2015" (2015, November 15)

This study investigated the determinants of financial inclusion for small scale farmers by focusing on the access to formal and informal agricultural credits in the Southern Province of Rwanda. Data were ... [more ▼]

This study investigated the determinants of financial inclusion for small scale farmers by focusing on the access to formal and informal agricultural credits in the Southern Province of Rwanda. Data were collected from 310 farmers from Huye and Nyamagabe districts through an open-ended structured questionnaire and analysed using the binary logistic regression method. The major findings, on one hand, showed that among the requested and approved agricultural loans, 87.2% and 12.7% were from informal and formal financial institutions respectively. Among those who accessed agricultural credits, 59.7% were from Huye and 40.3% from Nyamagabe. On the other hand, it was revealed that the household characteristics and the community attributes are the most important determinants. Those household characteristics include household income and expenditure, Ubudehe socio-economic category of the household, off-farm employment and the size of the land owned by the household whereas community attributes involve residence area, transport and informal financial services availability. Regarding farmer characteristics, the education level was found to be the only factor affecting the smallholder farmers' access to agricultural credit. In light of the findings, it was recommended to conduct sensitization sessions focusing on the importance of agricultural credits for smallholder farmers especially in the areas with high level of poverty. In addition, there is need to work on alleviating the formal agricultural credits access barriers, and to conduct a study on the dynamics of informal and formal agricultural credits up take and usage by smallholder farmers to explore all dimensions of financial inclusion in the study area. [less ▲]

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See detailThe Roll of Small Businesses in Traditional Handcraft in Rural Development: A Case-Study Of Hanoi Suburban Rattan Enterprises
Nguyen, Thi Thu Hien ULg; Lebailly, Philippe ULg; NGUYEN, Van Nghien

in International Conference on Emerging Challenges, Hanoi 12 november 2015 (2015, November 12)

Rural industrial development and new rural development programmes are the main target of Vietnam in the process of industrialization – modernization of the country. To expedite this process, it is ... [more ▼]

Rural industrial development and new rural development programmes are the main target of Vietnam in the process of industrialization – modernization of the country. To expedite this process, it is necessary to promote the development and encourage the contributions of small enterprise in general and small enterprise rural in particular because practices in many countries show the important role of small and micro enterprises in local development. This paper presents the initial results of research to understand the economic–social contributions of rural enterprises to local development through the mobilization of local resources as well as establishment of the economic-social relations in local of rattan’s enterprises in the suburb of Hanoi, and then propose some measures to facilitate the operation of enterprises and promote the contribution of rattan’s enterprises for local development. [less ▲]

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See detailDynamic modeling and control strategies analysis of a novel small CSP biomass plant for cogeneration applications in building
Desideri, Adriano ULg; Amicabile, Simone; Alberti, Fabrizio et al

in Dynamic modeling and control strategies analysis of a novel small CSP biomass plant for cogeneration applications in building (2015, November 12)

A concentrated solar power (CSP) biomass combined heat and power (CHP) system based on organic Rankine cycle (ORC) technology developed in the framework of the EU founded BRICKER project is presented. The ... [more ▼]

A concentrated solar power (CSP) biomass combined heat and power (CHP) system based on organic Rankine cycle (ORC) technology developed in the framework of the EU founded BRICKER project is presented. The CHP system coupled with heat recovery ventilation technology and novel insulation material has the aim of reducing the energy consumption of existing building by up to 50%. A simplified approach to implement a dynamic model of the CHP system is proposed. The model is firstly used to investigate the performances of the CHP system control logic under extreme working condition. Secondly, the effectiveness in ensuring safe working conditions and in maximizing the sun power usage of two different solar field control approaches is investigated simulating the developed model over a reference day [less ▲]

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See detailETUDE DE LA MICROSTRUCTURE DU MORTIER DE CIMENT A TRAVERS LES COURBES DE SORPTION
Kahlerras, Loubna ULg; Belhamri, Azeddine; Fraikin, Laurent ULg et al

in kahlerras, loubna (Ed.) Proceedings du séminaire International sur le Génie Climatique et l’Energétique, SIGCLE’2015 (2015, November 09)

La présente étude se focalise sur l’étude à travers les courbes de sorption de vapeur d’eau du comportement hydrique du mortier de ciment. Les expériences sont effectuées sur trois types de mortiers dont ... [more ▼]

La présente étude se focalise sur l’étude à travers les courbes de sorption de vapeur d’eau du comportement hydrique du mortier de ciment. Les expériences sont effectuées sur trois types de mortiers dont la seule différence est dans le rapport eau/ciment (E/C = 0,4, 0,5 et 0,6) afin d’étudier l’influence de ce rapport sur la microstructure du matériau. La méthode dynamique est utilisée pour l’obtention des isothermes de sorption en utilisant le « DVS (dynamic vapour sorption) Des échantillons en forme de concassât de quelques millimètres de diamètre sont utilisés, l’étude est complété par la porosité à mercure. Deux principaux modes poreux sont déterminés. [less ▲]

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See detailAdaptive Façades System Assessment: An initial review
Attia, Shady ULg; Favoino, Fabio; Loonen, Roel et al

in Advanced Building Skins (2015, November 03)

The assessment of adaptive facades presents a challenge because there is no established evaluation strategy to systematically reach this goal and many of the available building energy standards and codes ... [more ▼]

The assessment of adaptive facades presents a challenge because there is no established evaluation strategy to systematically reach this goal and many of the available building energy standards and codes have limited applicability for such advanced facades system. This paper reviews current evaluation methods for assessing adaptive facades system through a literature review. It also discusses occupant behaviour, post occupancy evaluation and commissioning issues and presents the procedures. The paper is part of the activities of Working Group 3 in COST Action TU1403 - Adaptive Facades Network. So far we could not find a protocol for assessment of adaptive facades. The reviewed literature is scattered lacking a focus on adaptive facades. There is no agreement on defining what are adaptive facades (sometimes named intelligent, smart, dynamic). We could define specialized technology monitoring techniques to assess the performance of technologies such as fabric-integrated solutions (e.g. electrochromic glazing, phase-change materials, building-Integrated Photovoltaics with heat recovery (BIPV/T, shade shutters) and advanced controls. The review is used to identify gaps in existing assessment methods and helps develop strategies for the holistic evaluation and assessment of adaptive facade systems as part of high performance buildings. [less ▲]

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See detailGustave Serrurier-Bovy, architecte, commerçant et industriel
Folville, Xavier ULg

in Art nouveau et écologie : Mélanges (2015, November 01)

« Il ne faut pas travailler pour un monde qui disparaît mais pour un monde nouveau dont on peut prévoir l’avènement ». Architecte par vocation et formation, puis commerçant, ensuite créateur et industriel ... [more ▼]

« Il ne faut pas travailler pour un monde qui disparaît mais pour un monde nouveau dont on peut prévoir l’avènement ». Architecte par vocation et formation, puis commerçant, ensuite créateur et industriel, le Liégeois Gustave Serrurier (1858-1910) est rapidement convaincu de la nécessité de lier l’architecture aux arts décoratifs. Il le fait avec la conviction politique et esthétique qu’une production industrialisée permettra de donner au plus grand nombre l’environnement artistique auquel tout être peut prétendre. Il pressent que le temps de l’artisanat est en passe d’être révolu et équipe progressivement ses ateliers de machines modernes. Si ses premières créations restent empreintes de l’esprit constructif des artisans néogothiques, s’il emploie ensuite des jeux de lignes courbes, tendues et maîtrisées, le début du XXe siècle le voit évoluer vers toujours plus de simplicité constructive et plus de rigueur géométrique. Grâce au mobilier, aux objets et aux aménagements d’intérieurs qu’il crée et fait réaliser par la centaine d’ouvriers de ses ateliers liégeois, sa firme prend rapidement une ampleur internationale et se fait remarquer dans les expositions universelles comme celle de Saint-Louis (U.S.A.) en 1904. Anticipant sur ce que seront les motivations d’un Bauhaus, ses préoccupations sociales et esthétiques conduisent Serrurier à imaginer un mobilier de plus en plus économique, rationnellement construit, adapté à l’usage et au lieu de destination, par exemple pour une habitation ouvrière à l’Exposition universelle de Liège en 1905. Là, un mobilier en orme équipe la salle commune égayée d’une frise au pochoir et de rideaux de lin garnis de carrés colorés. On y remarque un meuble à usage multiple, tout à la fois armoire, secrétaire et bibliothèque, sans autre décor que sa composition équilibrée ; banc, table et chaises sont faits d’éléments assemblés par des vis apparentes. C’est à cette même époque que Serrurier développe la ligne “Silex”, particulièrement représentative ; conçue de façon tout à fait originale et pragmatique, exécutée en bois blanc et décorée au pochoir, la plupart des assemblages de menuiserie sont remplacés par des vis apparentes. La découpe des planches se montre économe en matière. Une chaise, objet d’utilité commune, se doit d’être robuste, ergonomique et peu coûteuse à produire : ici, la production en série est aisée et pourra être assurée dans ses ateliers équipés de scies mécaniques et autres machines-outils. A l’examen, une chaise de cette série exprime bien les qualités de designer industriel de son concepteur et le place à l’avant-garde de son temps ; elle illustre aussi ses ambitions, tant sociales qu’esthétiques, et sa volonté d’un « art pour tous ». [less ▲]

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See detailGustave Serrurier-Bovy : un architecte à l’aube de la modernité
Folville, Xavier ULg

in Art nouveau et écologie : Mélanges (2015, November 01)

Abstract A l'extrême fin du 19e siècle, l'Art nouveau s’épanouit sous des formes diversifiées, parfois contradictoires, mais partageant généralement la même volonté de rompre avec l'académisme et l ... [more ▼]

Abstract A l'extrême fin du 19e siècle, l'Art nouveau s’épanouit sous des formes diversifiées, parfois contradictoires, mais partageant généralement la même volonté de rompre avec l'académisme et l'historicisme du siècle finissant. Parmi les acteurs de cet Art nouveau, certains ne retiennent que le côté décoratif d’une nouvelle esthétique. Très tôt cependant, au cœur même de ce mouvement d’avant-garde, apparaissent les prémices du renouvellement qui le condamnera et conduira au Modernisme. Quelques travaux de Gustave Serrurier – mobilier ou architecture – méritent d’être observés sous cet angle. [less ▲]

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See detailPièges à considérer lors de l’évaluation isocinétique
Croisier, Jean-Louis ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Abstract book des XVIIèmes RENCONTRES ISOCINETIQUES DE MEDIMEX (2015, November)

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See detailSensor based on the mode-localization effect in electrostatically-coupled MEMS resonators fabricated using an SOI process
Wood, Graham; Zhao, Chun; Pu, Suan et al

in Proceedings of the IEEE Sensors Conference, Nov. 2015 (2015, November)

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See detailEvaluation isocinétique et fonctionnelle de la rupture de coiffe des rotateurs non opérée
Forthomme, Bénédicte ULg; Schwartz, Cédric ULg; MAHIEU, Xavier ULg et al

in Abstract book des XVIIèmes RENCONTRES ISOCINETIQUES DE MEDIMEX (2015, November)

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See detailEtude technique et dendrochronologique de la roue découverte dans le puits du château fort de logne
Hoffsummer, Patrick ULg; Delye, Emmanuel ULg; Wéry, Benoit

in Frébutte, Christian (Ed.) Pré-actes des Journées d'Archéologie en Wallonie (2015, November)

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See detailImproving the Installation of Offshore Wind Farms by the use of Discrete Event Simulation
Muhabie, Yohannes Tekle ULg; Caprace, Jean-David ULg; Petcu, Cristian ULg et al

in Improving the Installation of Offshore Wind Farms by the use of Discrete Event Simulation (2015, November)

The offshore wind energy development is highly affected by the condition of the weather at sea. Hence, it demands a well-organized planning of the overall process starting from the producers’ sites until ... [more ▼]

The offshore wind energy development is highly affected by the condition of the weather at sea. Hence, it demands a well-organized planning of the overall process starting from the producers’ sites until the offshore site where the turbines will finally be installed. The planning phase can be supported with the help of Discrete Event Simulation (DES) where weather restrictions, distance matrix, vessel characteristics and assembly scenarios are taken into account. The purpose of this paper is to simulate the overall transport, assembly and installation of the wind turbine components at sea. The analysis is carried out through DES considering both the real historical weather data (wind speed and wave height) and probabilistic approach. Results of the study, applied to the real Offshore Wind Farm (OWF) configuration, are showing a good agreement between the two proposed models. The results point out that the probabilistic approach is highly affected by the semi-random numbers used to model the stochastic behavior of the input variable so that several iterations (200 to 400) are required to reach the convergence of the simulation outputs. We suggest that seasonality of the outputs of both models are preserved, i.e. the variation of the results depending on the variation of the weather along the year. These findings provide a new framework to address risks and uncertainties in OWF installations. [less ▲]

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See detailMASH2-0 electromechanical sigma-delta modulator for capacitive MEMS sensors with digital filter calibration using simulated annealing
Almutairy, Bader; Kraft, Michael ULg

in Proceedings of the IEEE Sensors Conference, Nov. 2015 (2015, November)

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See detailImpact of model reduction on the dynamic simulation of a micro-scale concentrated solar power system integrated with a thermal storage
Dickes, Rémi ULg; Wéber, Noé ULg; Lemort, Vincent ULg et al

in Proceedings of the ISES Solar World Congress 2015 (2015, November)

Because of the intermittent nature of solar irradiances, micro-scale solar thermal power systems almost never operate in nominal operating conditions. They are characterized by strong transients and ... [more ▼]

Because of the intermittent nature of solar irradiances, micro-scale solar thermal power systems almost never operate in nominal operating conditions. They are characterized by strong transients and require robust, fast and accurate dynamic simulation tools to permit a proper evaluation of their performance. Model reduction, i.e. the simplification of detailed models, is an attractive method to improve the computational efficiency while simulating such systems. In this context, a µCSP plant featuring a solar field of parabolic troughs, a thermocline storage and a 5kWe power unit is investigated. Both the solar field and the thermocline storage are modeled with complex and simplified methods. The whole power plant is simulated under identical operating condition and deviations between the simulation results are analyzed. Benefits and limitations of the current modeling approach are assessed. Improvements for the modeling of the thermocline storage are identified, implemented and validated. The Modelica language is used as simulation tool and the models developed in this work are integrated in the open-source ThermoCycle library. [less ▲]

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See detailERT monitoring of water infiltration process through a landfill cover layer
Dumont, Gaël ULg; Pilawski, Tamara ULg; Robert, Tanguy et al

in Berichte der Geologischen Bundesanstalt, 112 (2015, November)

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See detailImportance of microbiota in pets.
Diez, Marianne ULg

in Proceedings of the Petfood Day Tereos Syral (2015, October 30)

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See detailAnalysis of a concrete building exposed to natural fire
Sauca, Ana ULg; Gernay, Thomas ULg; Robert, Fabienne et al

in Wald, F.; Burgess, I.; Jelcic Rukavina, M. (Eds.) et al Proceedings of the Int. Conf. ASFE in Dubrovnik, 15-16 October 2015 (2015, October 16)

In this paper is presented the analysis of a concrete building exposed to OZone fire. The temperature development in the elements and the structural behaviour were calculated in SAFIR using beam elements ... [more ▼]

In this paper is presented the analysis of a concrete building exposed to OZone fire. The temperature development in the elements and the structural behaviour were calculated in SAFIR using beam elements for the columns and beams and shell elements for the floor slabs. The first floor was modelled and the effects of action from the upper storeys are applied as external loads. It is shown how the numerical analysis allows understanding the behaviour of the structure when exposed to a natural fire until complete cooling by analysing the evolution of displacements, the distributions of bending moments in the beams, the membrane forces in the slab, and the stresses in the elements. All this detailed information would not be available from an experimental test. [less ▲]

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See detailL'approche typologique processuelle comme modèle systémique de lecture des représentations graphiques dans les concours d'architecture
Boutemadja, Abdelkader ULg; Reiter, Sigrid ULg

in ESS 2015 (2015, October 16)

Dans le cadre de cet article nous allons expliquer la démarche entreprise pour essayer de mieux comprendre les productions actuelles d’image d’architecture. Pour ce faire, nous avons effectué des ... [more ▼]

Dans le cadre de cet article nous allons expliquer la démarche entreprise pour essayer de mieux comprendre les productions actuelles d’image d’architecture. Pour ce faire, nous avons effectué des recherches sur deux niveaux complémentaire ; la systémique et la sémiotique. Si la deuxième nous permet d’utiliser des outils concrets d’analyse de l’image la première nous offre les bases théoriques pour expliquer l’objet d’étude qu’est l’image. Nous nous attarderons dans cet article sur les emprunts fait à la typologie processuelle comme approche systémique étudiants le territoire et le bâti et plus particulièrement sur la notion de moment de crise point de départ de la compréhension d’un phénomène aussi complexe que la représentation graphique du projet. [less ▲]

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See detailSensitivity of structures to fire decay phases: quantitative comparison of structural components made of different materials
Gernay, Thomas ULg

in Wald, F.; Burgess, I.; Jelcic Rukavina, M. (Eds.) et al Proceedings of the Int. Conf. ASFE in Dubrovnik, 15-16 October 2015 (2015, October 16)

This work presents an analysis of the behaviour of different structural members under natural fires, with the aim to characterize their sensitivity to the fire decay phase. Thermo-mechanical numerical ... [more ▼]

This work presents an analysis of the behaviour of different structural members under natural fires, with the aim to characterize their sensitivity to the fire decay phase. Thermo-mechanical numerical simulations based on the non-linear finite element method are conducted using the parametric fire model of Eurocode to represent the natural fires. Results show that, for all the studied members (column, beam) and materials (reinforced concrete, steel, timber), structural failure during or after the cooling phase of a fire is a possible event. The major factors that promote delayed structural failure are the thermal inertia and the constituting material of the member. An indicator is proposed to quantify the propensity to delayed failure for structural members under natural fire. This work enhances the understanding of the structural behaviour under natural fires and has implications for the safety of the fire brigades and people proceeding to a building inspection after a fire. [less ▲]

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See detailTESTING AND MODELING A VANE EXPANDER USED IN AN ORC WORKING WITH HEXAMETHYLDISILOXANE (MM)
Vodicka, Vaclav; Guillaume, Ludovic ULg; Mascuch, Jakub et al

in ASME ORC 2015 (2015, October 15)

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See detailTOWARDS THE OPTIMAL OPERATION OF AN ORGANIC RANKINE CYCLE UNIT BY MEANS OF MODEL PREDICTIVE CONTROL Andres
Hernandez Naranjo, Jairo Andres ULg; Desideri, Adriano ULg; Ionescu, Clara et al

in TOWARDS THE OPTIMAL OPERATION OF AN ORGANIC RANKINE CYCLE UNIT BY MEANS OF MODEL PREDICTIVE CONTROL (2015, October 14)

In this paper the optimal operation of an Organic Rankine Cycle (ORC) unit is investigated both in terms of energy production and safety conditions. Simulations on a validated dynamic model of a real re ... [more ▼]

In this paper the optimal operation of an Organic Rankine Cycle (ORC) unit is investigated both in terms of energy production and safety conditions. Simulations on a validated dynamic model of a real re- generative ORC unit, are used to illustrate the existence of an optimal evaporating temperature which maximizes energy production for some given heat source conditions. This idea is further extended using a perturbation based Extremum Seeking (ES) algorithm to find online the optimal evaporating tempera- ture. Regarding safety conditions we propose the use of the Extended Prediction Self-Adaptive Control (EPSAC) approach to constrained Model Predictive Control (MPC). Since it uses input/output models for prediction, it avoids the need of state estimators, making of it a suitable tool for industrial applica- tions. The performance of the proposed control strategy is compared to PID-like schemes. Results show that EPSAC-MPC is a more effective control strategy as it allows a safer and more efficient operation of the ORC unit, as it can handle constraints in a natural way, operating close to the boundary conditions where power generation is maximized. [less ▲]

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See detailTu gme 10: Efficiency of shaft sealing for co2 sequestration in coal mines
Bertrand, François ULg; Charlier, Robert ULg; Collin, Frédéric ULg et al

in International Workshop on Geomechanics and Energy: The Ground as Energy Source and Storage (2015, October 13)

This work examined the efficiency of a shaft sealing system for the CO2 sequestration in abandoned coal mines. The particular case of the coal mine of Anderlues was considered. The performed simulation ... [more ▼]

This work examined the efficiency of a shaft sealing system for the CO2 sequestration in abandoned coal mines. The particular case of the coal mine of Anderlues was considered. The performed simulation took into account the anisotropic behaviour of shale and the presence of coalbeds. [less ▲]

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See detailAnalysis and comparison of different modeling approaches for the simulation of a micro-scale organic Rankine cycle power plant
Dickes, Rémi ULg; Dumont, Olivier ULg; Legros, Arnaud ULg et al

in Proceedings of the 3rd International Seminar on ORC Power Systems (2015, October 12)

When simulating a system based on the organic Rankine cycle (ORC), different modeling methods can be used to predict its performance. Each method is characterized by advantages, limitations and a level of ... [more ▼]

When simulating a system based on the organic Rankine cycle (ORC), different modeling methods can be used to predict its performance. Each method is characterized by advantages, limitations and a level of complexity. This contribution aims to assess the impact of the modeling approach on the performance prediction of ORC systems. To this end, a 2.8 kWe ORC unit is investigated as case study. In this paper, the components of the test bench are modeled using different approaches of increasing complexity and each model is calibrated using experimental data from the test rig. The goodness of fit as well as the benefits and limitations of each modeling methods are analyzed and discussed. [less ▲]

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See detailA new proposal for predicting the bearing resistance of bolted connections for tubular racking structures
Armenante, Vittorio; Latour, Massimo; Rizzano, Gianvittorio et al

in Proceeding of the XXV Congresso CTA (2015, October)

In the field of shelving structures for the storage of goods realized adopting tubular members, an interesting connection typology to be used to fasten the vertical columns to the beams is represented by ... [more ▼]

In the field of shelving structures for the storage of goods realized adopting tubular members, an interesting connection typology to be used to fasten the vertical columns to the beams is represented by bolted connections with long bolts in shear. With reference to this kind of connections, the authors have already performed a wide experimental and numerical investigation highlighting the occurrence, in this specific case, of local buckling phenomena. In this paper, the attention is focused on the influence of local buckling on the connection resistance, which is neglected by the current version of EC3 in the prediction of the resistance of shear connections of plates. In particular, starting from the results of the experimental and numerical analyses previously performed, in the present paper a formulation for predicting the bearing resistance of the examined connection able to account for the phenomenon of local instability is set up. [less ▲]

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See detailPrimeros datos sobre las interacciones planta-insecto del yacimiento de La Val (Estadilla, Huesca, NE Spain)
Moreno-Domiguez, Rafael; Cascales-Miñana, Borja ULg; Santos, Artai I et al

in Proceedings of the XXXI Annual Meeting of the Spanish Society of Palaeontology (abstract book) (2015, October)

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See detailPotential damping of extreme floods in the river Meuse between Ampsin (B) and the Belgian-Dutch border
Bruwier, Martin ULg; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

in Lenders, H.J.R.; Collas, F.P.L.; Geerling, G.W. (Eds.) et al Bridging gaps between river science, governance and management. Book of Abstracts NCR-Days 2015 (2015, October)

In the framework of the Interreg IVB project AMICE, hydraulic modelling of floods in the river Meuse was performed by coordinating existing models (Dewals et al. 2012a). The influence of climate change ... [more ▼]

In the framework of the Interreg IVB project AMICE, hydraulic modelling of floods in the river Meuse was performed by coordinating existing models (Dewals et al. 2012a). The influence of climate change scenarios was incorporated indirectly in the simulations through a transnational hydrological scenario (Drogue et al. 2010; Dewals et al. 2013). For a “wet” future climate, this scenario assumes that the peak discharge Q100 of the 100-year flood would increase by 15 % for the time horizon 2021-2050 and by 30 % for the time horizon 2071-2100. However, the design discharge currently used for planning in the Netherlands is higher than those considered to date in the AMICE project. From this perspective, it becomes relevant to analyse flood scenarios corresponding to a peak discharge above Q100+30 %, referred to hereafter as an “extreme” flood. The aim of the study is to give an appreciation of the potential damping of one extreme flood scenario along the river Meuse between Ampsin (Belgium) and the Belgian-Dutch border (Figure 1). This analysis is based on the hydraulic model WOLF 2D (Erpicum et al. 2010) applied to a coarse grid with simplifications in the schematisation. The hydraulic model WOLF 2D has been already used in several studies to simulate floods (Ernst et al. 2010; Beckers et al. 2013, Bruwier et al. 2015, Detrembleur et al. 2015). The coarsening of the grid for simulating the extreme flood scenario is necessary to preserve the computational efficiency, since both the total flood duration and the inundation extents (hence the number of grid cells) increase considerably between the Q100 + 30 % scenario considered previously and the extreme scenario considered here. [less ▲]

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See detailTrade secrets: Overlap with restraint of trade, aspects of enforcement - Belgium
Kaesmacher, Dominique; Vanbrabant, Bernard ULg; Thoumsin, Pierre-Yves et al

in AIPPI Yearbook 2014 (2015, October)

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See detailLa participation et ses distorsions: du malentendu aux bénéfices secondaires
Italiano, Patrick ULg

in Bingen, Aline; Pilet, Jean-Benoît (Eds.) L'art de la participation (2015, October)

Les dispositifs participatifs, dans la vie réelle, sont souvent soit verrouillés soit déconnectés de la décision finale sur laquelle ils sont censés porter. Cela peut avoir des effets délétères sur les ... [more ▼]

Les dispositifs participatifs, dans la vie réelle, sont souvent soit verrouillés soit déconnectés de la décision finale sur laquelle ils sont censés porter. Cela peut avoir des effets délétères sur les publics que ces dispositifs voulaient impliquer. Il n'est pas rare que l'on donne le label "participation" à des processus dont la nature est mieux décrite par d'autres concepts. En définitive, c'est probablement dans des dispositifs centrés sur les personnes, et non sur des prises de décisions politiques, que l'exercice participatif est le plus susceptible d'avoir un effet positif univoque. [less ▲]

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See detailEtude et prévalence des troubles neuroendocriniens dans une série de 65 patients avec dommages cérébraux post-traumatiques (TBI) recrutés à partir de la médecine d'expertise
VALDES SOCIN, Hernan Gonzalo ULg; Potorac, J; Matagne et al

in Abstract book - Annales d'Endocrinologie - 32ème Congrès de la Société Française d'Endocrinologie (2015, October)

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See detailEtude moléculaire du gène AIP sur plus de 1400 individus atteints d'adénome hypophysaire
CASTERMANS, Emilie ULg; Auriemma, R; Rostomyan, Liliya ULg et al

in Abstract book - Annales d'Endocrinologie - 32ème Congrès de la Société Française d'Endocrinologie (2015, October)

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See detailHyperthyroïdie sur maladie de Basedow survenant après une hypothyroïdie de Hashimoto : étude clinique et biologique sur 10 cas
Maiga, Ibrahima ULg; BETEA, Daniela ULg; Beckers, Albert ULg et al

in Abstract book - Annales d'Endocrinologie - 32ème Congrès de la Société Française d'Endocrinologie (2015, October)

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See detailA Generic Feature Selection Method for Background Subtraction Using Global Foreground Models
Braham, Marc ULg; Van Droogenbroeck, Marc ULg

in Advanced Concepts for Intelligent Vision Systems (2015, October)

Over the last few years, a wide variety of background subtraction algorithms have been proposed for the detection of moving objects in videos acquired with a static camera. While much effort have been ... [more ▼]

Over the last few years, a wide variety of background subtraction algorithms have been proposed for the detection of moving objects in videos acquired with a static camera. While much effort have been devoted to the development of robust background models, the automatic spatial selection of useful features for representing the background has been neglected. In this paper, we propose a generic and tractable feature selection method. Interesting contributions of this work are the proposal of a selection process coherent with the segmentation process and the exploitation of global foreground models in the selection strategy. Experiments conducted on the ViBe algorithm show that our feature selection technique improves the segmentation results. [less ▲]

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See detailFurther observations on the endPermian mass extinction based on the palaeobotanical record
Cascales-Miñana, Borja ULg; Diez, José B.; Gerrienne, Philippe ULg et al

in Proceedings of the XXXI Annual Meeting of the Spanish Society of Palaeontology (abstract book) (2015, October)

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See detailWe gme P08: Fiber-optic temperature profiles analysis for closed-loop geothermal systems-a case study
Radioti, Georgia ULg; Delvoie, Simon ULg; Sartor, Kevin ULg et al

in Second EAGE Workshop on Geomechanics and Energy: The ground as energy source and storage (2015, October)

In order to study the behaviour of shallow closed-loop geothermal systems four borehole heat exchangers equipped with fiber optics were installed on the campus of the University of Liege (Liege, Belgium ... [more ▼]

In order to study the behaviour of shallow closed-loop geothermal systems four borehole heat exchangers equipped with fiber optics were installed on the campus of the University of Liege (Liege, Belgium) over a surface area of 32m². This paper presents the analysis of continuous, high-resolution temperature profiles measured along the boreholes length. The undisturbed ground temperature measurements indicate heat loss from ground structures located close to the boreholes. A 3D numerical model is presented to reproduce the measured temperature profiles. Temperature profiles during hardening of the grouting material indicate extended fractured zones in the rock mass. Temperature measurements during the recovery phase of a Distributed Thermal Response Test indicate the succession of rock layers with different mineral content. The results are in good agreement with those of the borehole televiewer logging method. The presented analysis could provide information on bedrock heterogeneity, on the anisotropic thermal behaviour of the rock mass and on the ground temperature variations due to heat loss from ground structures. These information could significantly contribute to the long-term behaviour prediction of the geothermal system and the geothermal reservoir potential. [less ▲]

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See detailHow T2-weighted signal intensity of GH-secreting adenomas correlates wit response to primary somatostatin analogue therapy in acromegaly
Potorac, Iulia ULg; PETROSSIANS, Patrick ULg; Daly, Adrian ULg et al

in Abstract book - 25th meeting of the Belgian Endocrine Society (2015, October)

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See detailPerinatal Group B streptococcal Disease
Melin, Pierrette ULg

in Melin, Pierrette (Ed.) Les infections de la sphères génitales (2015, October)

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See detailOn the plant diversity changes during the Ordovician-Mississippian time interval
Cascales-Miñana, Borja ULg

in Proceedings of the XXXI Annual Meeting of the Spanish Society of Palaeontology (abstract book) (2015, October)

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See detailSyndrome thyrogastrique autoimmun (STGA) : la gastrite auto-immune isolée (GAI) et celle associée à Helicobacter (Hp) ont des caractéristiques anatomocliniques différentes
VALDES SOCIN, Hernan Gonzalo ULg; MESUREUR, Thierry ULg; POLUS, Marc ULg et al

in Abstract book - Annales d'Endocrinologie - 32ème Congrès de la Société Française d'Endocrinologie (2015, October)

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See detailUne forme compliquée d'hypercalcémie hypocalciurique familiale
Potorac, Iulia ULg; BETEA, Daniela ULg; MALAISE, Olivier ULg et al

in Abstract book - Annales d'Endocrinologie - 32ème Congrès de la Société Française d'Endocrinologie (2015, October)

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See detailHyperparathyroïdie primaire familiale isolée - corrélation génotype - phénotype des mutations MEN 1?
Potorac, Iulia ULg; BETEA, Daniela ULg; PETROSSIANS, Patrick ULg et al

in Abstract book - Annales d'Endocrinologie - 32ème Congrès de la Société Française d'Endocrinologie (2015, October)

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See detailNouvelle mutation du Fibroblast Growth Factor Receptor 1 (FGFR1)-cause d'hypogonadisme hypogonadotrope idiopathique normosmique
Potorac, Iulia ULg; Chachati, Anne-Sophie ULg; Debray, François-Guillaume ULg et al

in Abstract book- Annales d'Endocrinologie - 32ème Congrès de la Société Française d'Endocrinologie (2015, October)

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See detailHypogonadisme hypogonadotrope normosmique familial : identification d'une nouvelle mutation c.1664-2A> T du gène FGFR1
VALDES SOCIN, Hernan Gonzalo ULg; Pintiaux, Axelle ULg; LIBIOULLE, Cécile ULg et al

in Abstract book - Annales d'Endocrinologie - 32ème Congrès de la Société Française d'Endocrinologie (2015, October)

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See detailSILURIAN – DEVONIAN OF THE ORIENTAL ALGERIAN SAHARA: implication of new field data from Tassili n'Ajjer outcrops and Berkine Basin (SE, Algeria) for shale gas exploration.
Djouder, Hocine ULg; Boulvain, Frédéric ULg; Da Silva, Anne-Christine ULg et al

in EPC'2015 THE THIRTEENTH TUNISIAN PETROLEUM EXPLORATION & PRODUCTION CONFERENCE (2015, October)

The Silurian – Devonian succession have been deposited in wide sags and sub-basins in a cratonic setting, along the northwestern passive margin of the Gondwana during the opening of the proto-Tethyan ... [more ▼]

The Silurian – Devonian succession have been deposited in wide sags and sub-basins in a cratonic setting, along the northwestern passive margin of the Gondwana during the opening of the proto-Tethyan ocean. During this Siluro-Devonian Period, a high subsidence occurs stacked sediment bodies and organic-rich shales were deposited in many places that respectively form important hydrocarbon reservoirs and source rocks throughout North Africa basins and Arabia (Boot et al., 1998 ; Lüning et al., 2000), which lead Algeria to hold the fourth position in terms of the estimates of technically recoverable shale oil and shale gas resources, based on major basin assessment in the world (EIA, 2013). In the prolific Illizi and Berkine basins (western Ghadames, Algeria) a basin-wide approach is needed, especially with the new “shale gas and shale oil” frontier in the upcoming years, in order to capture regional trends and re-assessment on organic-rich (‘hot’) shale unites which in smaller-scale industrial studies are overlooked. Berkine Basin covers nearly 102.000 km2. This basin has been a thick sedimentary series of 7000 m corresponding to complex reservoirs but also black shales of the basal Silurian and Frasnian respectively major and secondary source rock systems. Wireline-logs from more than 146 (Berkine – Illizi Basins) Algerian petroleum exploration wells have been studies (Djouder et al., 2012; Djouder et al., 2014), and recently 03 months extensive field study of outcrops of the Siluro-Devonian sediments was carried out at the south margin (SE, Tassili n’Ajjer) of the basin. The following analysis incorporates biostratigraphic, ichnological, sedimentological and high resolution stratigraphic data, which provides a framework evolution from offshore to deltaic deposition for the Silurian then fluvial to normal-marine depositional conditions for the Devonian. A total of 06 short-term, third-order sequences can be identified for the Silurian deposits: (i) 'Hot Shale' Oued Imihrou Formation, organic-rich shales with carbonates nodules (Si-1); (ii) above is the Atafaïtafa Formation 500 to 650 m thick with HCS, gutter casts and Cruziana Ichnofacies (Si-2, Si-3); (iii) then overlaid by coarsening-shallowing-upward units. These sequences (Si-4, Si-5 & Si-6) with Storm-wave dominated and Skolithos Ichnofacies are interpreted to reflect deltaic origin. This delta is the result of a significant sea-level drop during the Upper Silurian (Beuf et al, 1971) but also from the high sedimentation rates prograding northwards (Eschard et al., 2005). Devonian deposit also can be divided into fourth third-order sequences (Dev-1 to 4), by the same previous analysis. The base of the cycle is the Caledonian unconformity linked to a tectonic event which affected most of the Gondwanan margin at the Silurian – Devonian boundary and a major relative sea-level fall (Eschard et al., 2005). Previous sequences defined from Tassili n’Ajjer outcrops are well recognized at the basin-scale (Berkine Basin) and can be correlated in the subsurface of the Illizi – Berkine basins (Djouder et al., 2012). Finally, the full depositional cycle for the Silurian – Devonian is reached and capped by the Frasnian maximum flooding surface, with black shales across North Africa (Algeria, western Libya and southern Tunisia) and which are also developed in many parts of the world (Lüning et al., 2003). [less ▲]

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See detailSymboliser et conceptualiser, deux facettes indispensables de la pensée mathématique. L'exemple de l'algèbre.
Vlassis, Joëlle; Fagnant, Annick ULg; Demonty, Isabelle ULg

in Actes du congrès EMF 2015. Pluralités culturelles et universalité des mathématiques : enjeux et perspectives pour leur enseignement et leur apprentissage. (2015, October)

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See detailCombining Features for Cover Song Identification
Osmalsky, Julien ULg; Embrechts, Jean-Jacques ULg; Foster, Peter et al

in 16th International Society for Music Information Retrieval Conference (2015, October)

In this paper, we evaluate a set of methods for combining features for cover song identification. We first create multiple classifiers based on global tempo, duration, loudness, beats and chroma average ... [more ▼]

In this paper, we evaluate a set of methods for combining features for cover song identification. We first create multiple classifiers based on global tempo, duration, loudness, beats and chroma average features, training a random forest for each feature. Subsequently, we evaluate standard combination rules for merging these single classifiers into a composite classifier based on global features. We further obtain two higher level classifiers based on chroma features: one based on comparing histograms of quantized chroma features, and a second one based on computing cross-correlations between sequences of chroma features, to account for temporal information. For combining the latter chroma-based classifiers with the composite classifier based on global features, we use standard rank aggregation methods adapted from the information retrieval literature. We evaluate performance with the Second Hand Song dataset, where we quantify performance using multiple statistics. We observe that each combination rule outperforms single methods in terms of the total number of identified queries. Experiments with rank aggregation me- thods show an increase of up to 23.5 % of the number of identified queries, compared to single classifiers. [less ▲]

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See detailUne lésion sellaire d'évolution hautement fluctuante
BETEA, Daniela ULg; Potorac, Iulia ULg; BONNEVILLE, Jean-François ULg et al

in Abstract book - Annales d'Endocrinologie - 32ème Congrès de la Société Française d'Endocrinologie (2015, October)

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See detailAnthropogenic particles in stomachs of anchovies (Engraulis encrasicolus) related to gill rakers morphology
Collard, France ULg; Das, Krishna ULg; Gilbert, Bernard ULg et al

in Proceedings of In the Wake of Plastics, Venice, October 13-15, 2015 (2015, October)

Anthropogenic debris (AB) contaminate oceans and affect marine organisms in several ways. Plastic production is constantly increasing and it is estimated that 10% of this production end in the seas. As a ... [more ▼]

Anthropogenic debris (AB) contaminate oceans and affect marine organisms in several ways. Plastic production is constantly increasing and it is estimated that 10% of this production end in the seas. As a consequence, plastic is considered as an emerging contaminant and ingestions by organisms are increasingly reported. Microdebris (< 5mm) are available for a high range of organisms, including planktivorous fish, such as the European anchovy (Engraulis encrasicolus). Planktivorous fish have a particular gill basket, with long and tight gill rakers, related to their diet. Upon these gill rakers, small structures called denticles are present. These gill rakers act as a net to trap organic particles and AB. The aim of our study was to correlate sizes of AB ingested with the mesh constituted by the gill rakers and associated structures. Fifteen stomach contents were analyzed by Raman spectroscopy and particles were measured. Five gill arches were observed with a scanning electron microscope. Cellulose fibers and microplastics were the most AB ingested. Comparing to other Clupeiformes (pilchard and Atlantic herring), anchovies have more denticles on each gill rakers (personal data). AB ingestion by fish is poorly studied and impacts of AB are not much understood. Clupeiformes play a major role in marine ecosystems and is the most consumed order by humans. As the branchial basket constitutes a food selective apparatus, more morphological studies dealing with AB ingestion on Clupeiformes are needed. [less ▲]

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See detailNew genetic cause of gigantism and FIPA
Rostomyan, Liliya ULg; Daly, Adrian ULg; Trivellin, G et al

in Abstract book - 25th meeting of the Belgian Endocrine Society (2015, October)

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See detailAnthocyanin-rich blackcurrant juice induces a redox-sensitive caspase 3-related pro-apoptotic effect in leukemia Jurkat cells: role of delphinidin-3-O-glucoside and delphinidin-3-O-rutinoside
Leon-Gonzalez; Sharif, T; Kayali, A et al

in 7th International Conference on Polyphenols and Health (2015, October)

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See detailIs the Darwin´s “Abominable Mystery” still a mystery?
Cascales-Miñana, Borja ULg; Cleal, Chris J.; Gerrienne, Philippe ULg

in Proceedings of the XXXI Annual Meeting of the Spanish Society of Palaeontology (abstract book) (2015, October)

Detailed reference viewed: 10 (3 ULg)