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See detailWhat are the HRS4R benefits/impact for institutions and researchers?
Halleux, Isabelle ULiege

Scientific conference (2017, October 17)

This presentation aims to share the experience of the University of Liege that was awared the "HR excellence in research" logo by the EU in 2011. The institution developed an action plan for enhancing the ... [more ▼]

This presentation aims to share the experience of the University of Liege that was awared the "HR excellence in research" logo by the EU in 2011. The institution developed an action plan for enhancing the working conditions of the researchers, to open positions to foreign researchers and to offer them training as services for their career development. [less ▲]

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See detailNew Diva capabilities for climatologies
Barth, Alexander ULiege; Troupin, Charles ULiege; Watelet, Sylvain ULiege et al

Conference (2017, October 17)

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See detailLa France du Front populaire
Lanneau, Catherine ULiege

Conference given outside the academic context (2017)

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See detailRapport belge au 2e Forum annuel de droit comparé du Parlement européen : Les recours des particuliers devant les plus hautes juridictions
Behrendt, Christian ULiege; Pironnet, Quentin ULiege

Scientific conference (2017, October 16)

Rapport belge présenté au Deuxième Forum de droit comparé, organisé par le Parlement européen (European Parliamentary Research Service) à Bruxelles, 16-17 octobre 2017

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See detailProgress with analysis of DIVA as cloud service
Barth, Alexander ULiege; Troupin, Charles ULiege; Watelet, Sylvain ULiege et al

Conference (2017, October 16)

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See detailEffects of a ‘one film for 2 years’ system on the grain yield, water use efficiency and cost-benefit balance in dryland spring maize (Zea mays L.) on the Loess Plateau, China
Chen, Baoqing; Yan, Changrong; Garré, Sarah ULiege et al

in Archives of Agronomy and Soil Science (2017)

‘One film for 2 years’ (PM2) has been proposed as a practice to control the residual film pollution; however, its effects on grain-yield, water-use-efficiency and cost-benefit balance in dryland spring ... [more ▼]

‘One film for 2 years’ (PM2) has been proposed as a practice to control the residual film pollution; however, its effects on grain-yield, water-use-efficiency and cost-benefit balance in dryland spring maize production have still not been systematically explored. In this study, we compared the performance of PM2 with the annual film replacement treatment (PM1) and no mulch treatment (CK) on the Loess Plateau in 2015-2016. Our results indicated the following: (1) PM2 was effective at improving the topsoil moisture (0-20 cm) at sowing time and at seedling stage, but there was no significant influence on soil water storage, seasonal average soil moisture or evapotranspiration; (2) PM2 induced significantly higher cumulative soil temperatures compared to CK, and there was no significant difference between PM2 and PM1; (3) no significant differences were identified in grain-yield and water-use-efficiency between PM1 and PM2, and compared to CK, they improved by 16.3% and 15.5%, respectively; (4) because of lower cost of plastic film, tillage, film laying and remove in PM2, economic profits improved by 21% and 70% compared to PM1 and CK. This research suggested that PM2 was effective at alleviating the spring drought and was beneficial in reducing poverty traps in dryland. [less ▲]

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See detailBayesian single-step genomic evaluations combining local and foreign information in Walloon Holsteins
Colinet, Frédéric ULiege; Vandenplas, J.; Vanderick, Sylvie ULiege et al

in Animal (2017)

Most dairy cattle populations found in different countries around the world are small to medium sized and use many artificial insemination bulls imported from different foreign countries. The Walloon ... [more ▼]

Most dairy cattle populations found in different countries around the world are small to medium sized and use many artificial insemination bulls imported from different foreign countries. The Walloon population in the southern part of Belgium is a good example for such a small-scale population. Wallonia has also a very active community of Holstein breeders requesting high level genetic evaluation services. Single-step Genomic BLUP (ssGBLUP) methods allow the simultaneous use of genomic, pedigree and phenotypic information and could reduce potential biases in the estimation of genomically enhanced breeding values (GEBV). Therefore, in the context of implementing a Walloon genomic evaluation system for Holsteins, it was considered as the best option. However, in contrast to multi-step genomic predictions, natively ssGBLUP will only use local phenotypic information and is unable to use directly important other sources of information coming from abroad, for example Multiple Across Country Evaluation (MACE) results as provided by the Interbull Center (Uppsala, Sweden). Therefore, we developed and implemented single-step Genomic Bayesian Prediction (ssGBayes), as an alternative method for the Walloon genomic evaluations. The ssGBayes method approximated the correct system of equations directly using estimated breeding values (EBV) and associated reliabilities (REL) without any explicit deregression step. In the Walloon genomic evaluation, local information refers to Walloon EBV and REL and foreign information refers to MACE EBV and associated REL. Combining simultaneously all available genotypes, pedigree, local and foreign information in an evaluation can be achieved but adding contributions to left-hand and right-hand sides subtracting double-counted contributions. Correct propagation of external information avoiding double counting of contributions due to relationships and due to records can be achieved. This ssGBayes method computed more accurate predictions for all types of animals. For example, for genotyped animals with low Walloon REL (<0.25) without MACE results but sired by genotyped bulls with MACE results, the average increase of REL for the studied traits was 0.38 points of which 0.08 points could be traced to the inclusion of MACE information. For other categories of genotyped animals, the contribution by MACE information was also high. The Walloon genomic evaluation system passed for the first time the Interbull GEBV tests for several traits in July 2013. Recent experiences reported here refer to its use in April 2016 for the routine genomic evaluations of milk production, udder health and type traits. Results showed that the proposed methodology should also be of interest for other, similar, populations. [less ▲]

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See detailImpact of Financial Assumptions on the Cost Optimality towards Nearly Zero Energy Buildings- A case study
Hamdy, Mohamed; Siren, Kai; Attia, Shady ULiege

in Energy and Buildings (2017), 153

The energy efficiency challenge in Europe is mainly concerned with existing buildings and the investment scenarios to implement deep renovations. The cost-optimal approach imposed on EU-Member states by ... [more ▼]

The energy efficiency challenge in Europe is mainly concerned with existing buildings and the investment scenarios to implement deep renovations. The cost-optimal approach imposed on EU-Member states by the European Energy Performance of Buildings Directive aims to identify the investment gap and challenges to transform existing buildings into nearly Zero Energy Buildings (nZEBs). The investment gap is function of several volatile financial parameters including discount rate (r), developing of energy price (e), decline rate of technology price (d), as well as nZEB’s incentives like feed-in-tariff (FiT) and investment grant (iG). In this context, the decision making process of individuals or investment institutions is hindered by complexity and uncertainty. In order to assist the decision making process and improve the visibility of financial energy benefits, a novel optimization-based parametric analysis scheme (OptnZEB-I) is developed. The scheme is designed to investigate a large number of economic scenarios (i.e., combinations of financial assumptions) in a short computational time while a holistic optimization approach is adopting for exploring all possible design options including energy conservation measures (ESMs); renewable energy sources (RETs) and mechanical systems (Sys). For demonstration, the scheme is applied to analyse the impact of several financial parameters on the cost-optimal energy performance level (CO-EPL) of a single family house in Finland. In line with the EU-directive, a large number of possible design options (∼3 × 109million) are optimized for 4608 cases of economic scenarios. The results of the address case study show that, in average, the CO-EPL ranges from 90 to 160 [kWh/m2]. The range has most frequent value of 145 kWh/m2. The CO-EPL is significantly sensitive to the e, f, then i, respectively. Less sensitivity is found to the other financial parameters. The robustness of the optimization results are verified by solving the addressed design problem by using four different optimization algorithms (i.e., pattern search, interior-point, simulated annealing and genetic algorithms). [less ▲]

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See detailExperimental validation of heat transport modelling in district heating networks.
Sartor, Kevin ULiege

in Energy (2017), 137

District heating networks (DHN) are generally considered as a convenient, economic and environmental-friendly way to supply heat to a large amount of buildings. Some modelling methods are required to ... [more ▼]

District heating networks (DHN) are generally considered as a convenient, economic and environmental-friendly way to supply heat to a large amount of buildings. Some modelling methods are required to consider the dynamic behaviour of district heating networks to design them correctly, spare the investment costs and limit the heat losses related to the use of a too high operating temperatures. For the same reasons, the DHN control or retrofit of installations also requires the assessment of the DHN dynamic behaviour. To achieve this, the heat transport in DHN, which is one of the key issues in the behaviour of a whole centralized heating system, has to be correctly modelled. Previous work evidenced current limitations of one dimensional finite volume method to model heat transport in pipes and proposed an alternative method considering the thermal losses and the inertia of the pipes. The present contribution intends to experimentally validate this model on a test rig available at the Thermodynamics laboratory of the University of Liège (ULg, Belgium) and on an existing district heating network. For both experimental facilities, the current model shows good agreement between the experimental data and the simulation results for a large range of water velocities. Moreover, it is shown that the thermal inertia of the pipe has a significant influence on the outlet pipe temperature profile. [less ▲]

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See detailART ET ENVIRONNEMENT GOÛTER PHILO #1
Hagelstein, Maud ULiege

Conference given outside the academic context (2017)

À quoi servent les œuvres d'art si elles n'ont plus seulement vocation à être "belles" ? Quelle incidence peuvent-elles avoir sur la vie politique et sociale ? On interrogera, lors de cette séance, les ... [more ▼]

À quoi servent les œuvres d'art si elles n'ont plus seulement vocation à être "belles" ? Quelle incidence peuvent-elles avoir sur la vie politique et sociale ? On interrogera, lors de cette séance, les représentations sensibles (plastiques) des transformations environnementales, dans les arts visuels en particulier. Comment parler aujourd'hui - en art - du paysage ? Comment expliquer la place prédominante du monde animal dans le champ de l'art contemporain ? Quelles formes de créativité peut-on observer dans la nature ? On pourra envisager différents artistes (Hiroshi Sugimoto, Richard Long, Cai Guo-Qiang, Karl Blossfeldt, etc.) et théoriciens (Bernie Krause, Gilles Clément, Vinciane Despret). [less ▲]

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See detailPRP et tendinopathies
Kaux, Jean-François ULiege

Conference (2017, October 14)

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See detailPathologies of reproduction in beef cattle
Hanzen, Christian ULiege; Rao, Anne-Sophie ULiege

Scientific conference (2017, October 14)

The aim of this conference is to describe - Some characteristics on bovine meat production - What kind of reproduction performances for beef cattle - Some figures for first calving and calving interval in ... [more ▼]

The aim of this conference is to describe - Some characteristics on bovine meat production - What kind of reproduction performances for beef cattle - Some figures for first calving and calving interval in France and Belgium - Some specific factors affecting the reproduction performances in beef cattle (Uterine hypoplasia in Belgian Blue heifers, Dystocia and C section, Aseptic fibrinous parietal peritonitis, Pathologies of the postpartum (Postpartum anoestrus, Fertility) - Hormonal management of reproduction : heat synchronisation [less ▲]

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See detailReinforced poly(hydroxyurethane) thermosets as high performance adhesives for aluminum substrates
Panchireddy, Satyannarayana ULiege; Thomassin, Jean-Michel ULiege; Grignard, Bruno ULiege et al

in Polymer Chemistry (2017), 8(38), 5897-5909

Poly(hydroxyurethane) (PHU) thermosets reinforced with (functional) nanofillers were developed to design high performance adhesives for bare aluminum. Solvent-free cyclic carbonate/amine/PDMS formulations ... [more ▼]

Poly(hydroxyurethane) (PHU) thermosets reinforced with (functional) nanofillers were developed to design high performance adhesives for bare aluminum. Solvent-free cyclic carbonate/amine/PDMS formulations loaded with native, epoxy- or cyclic carbonate-functionalized ZnO nanofillers were premixed before deposition and thermal curing onto Al. The results highlight that the addition of PDMS prevents PHUs from delamination of the Al surface by increasing the adhesive hydrophobicity and thus limiting the water uptake. The dispersion of functional fillers within PHUs improves their thermal and mechanical properties. Benchmarking of the adhesive performances of the reinforced PHU glues with existing PHU formulations attests for the benefits of dispersing functional fillers and PDMS within the resin and evidences a 270% increase of the shear strength of reinforced PHUs adhesives compared to formulations reported in the literature. [less ▲]

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See detailClinical and haematological alterations in foot and mouth disease virus naturally-infected domestic water buffaloes in Vietnam
Dam Van Phai, ULiege; BUI TRAN ANH, Dao, ; Desmecht, Daniel ULiege

Poster (2017, October 13)

Foot and mouth disease (FMD) has been one of the most important epizootic diseases in several cloven-hoofed animals including buffaloes, causing severe economic losses in Vietnam. This study aimed at ... [more ▼]

Foot and mouth disease (FMD) has been one of the most important epizootic diseases in several cloven-hoofed animals including buffaloes, causing severe economic losses in Vietnam. This study aimed at observing clinical indicators, physiological parameters, haematological and blood chemistry values of 30 buffaloes naturally infected with FMD virus (FMDV). The study was undertaken from January 2015 to February 2016 in Hanoi, Vietnam. Results show that buffaloes infected with FMDV displayed significantly higher fever, increased respiratory rate and increased heart frequency compared to healthy animals. Moreover, FMDV-infected animals always showed high fever and vesicular stomatitis, often showed edging nail congestive inflammation and, sometimes only, blisters on the nipple. Haematological indicators showed that FMDV-infected buffaloes were dehydrated (increased total protein). Besides, infected animals also underwent anaemia as mean corpuscular haemoglobin and mean corpuscular haemoglobin concentrations were plummeted. Total white blood cell count plummeted too, especially the number and proportion of neutrophils. Meanwhile, the number and proportion of lymphocytes sharply increased compared to healthy animals. Infected buffaloes also displayed signs of liver and heart damages as judged by an increase in concentration of AST and ALT, while there was not renal damage since creatinine concentration remained stable [less ▲]

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See detailInventory of Beekeeping in the Algerian north (Tizi-ouzou and Bejaia)
Yahi, Krimou; Touazi, Leghel; Kaidi, Rachid et al

Poster (2017, October 13)

The objective of this study is to make an inventory of the honey production in the counties of Bejaia and Tizi-Ouzou in northeastern Algeria. To achieve this, a survey was carried out on 31 beekeepers (14 ... [more ▼]

The objective of this study is to make an inventory of the honey production in the counties of Bejaia and Tizi-Ouzou in northeastern Algeria. To achieve this, a survey was carried out on 31 beekeepers (14 in Bejaia and 17 in Tizi-Ouzou). The survey shows a social, cultural and religious role for 61.29% of the beekeepers. The beekeeping is primarily held by men (93.55%). It is the basic source of income for 64.52% of the respondents. The average age of the beekeepers is 42.90years (Min-Max: 28-67 years, Median: 40.5 years). The main products of the hive are honey (100%), swarms (16.13%), royal jelly (9.68%) and propolis (9.68%). The average honey production per hive is 7.70kg (Min-Max: 0.4-15kg hives, Median: 10kg). The average number of hives per beekeeper is 42.20 hives (Min-Max: 3-300 hives, Median: 17.50 hives). The average selling price of one kg of honey is 4000.00 DA / kg (Min-Max: 2000-5000DA; Median: 4000DA). The phenotype of the bee reported by 74.19% of the surveys is of small size with a long body and dark pigmentation corresponding to the breed “Apis mellifera intermissa”. Two apiculturists described another phenotype corresponding to the “Apis mellifera major”. The factors behind the motivations for beekeeping are consumption of honey (100%), income generation (90.32%), hobby (58.06%) and conservation of biodiversity (22.58%). The multiple constraints associated with several diseases, notably Varroase (mentioned by 80.65% of beekeepers), cause difficulties for the breeders. Thus they cannot profit maximum from beekeeping. Other constraints which were reported are; forest fires (35.48%), wasps (32.26%), absence of beekeeping professionals or technicians (29.03%), harsh and cold winters with snow (19.35%), high density of hives in the region (16.13%) and uncontrolled spreading of pesticides and crop protection products at farms (12.90%). The economic situation of the Algerian beekeepers can be optimized by improving the production potential of the local bees. [less ▲]

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See detailQuality assessment of marketed eggs in Hanoi (Vietnam)
Moula, Nassim ULiege; Luc, Do Duc; Bo, H. X. et al

Poster (2017, October 13)

Poultry farming is the first sector of livestock that has been industrialized. The poultry sector plays an important role in the GDP of Vietnam. It is the second largest livestock after the pig livestock ... [more ▼]

Poultry farming is the first sector of livestock that has been industrialized. The poultry sector plays an important role in the GDP of Vietnam. It is the second largest livestock after the pig livestock. The production and consumption of eggs in Vietnam is estimated as 5.64 billion and 102.6 eggs per person per year respectively. The aim of this study was to assess the quality of eggs in relation to the chicken breed and different marketing channels in Hanoi, Vietnam. In total, 431 chicken eggs were purchased from four different marketing channels in Hanoi, including households (89 eggs), supermarkets (152 eggs), public markets (130 eggs) and small grocery stores (50 eggs). Out of the 431 above-mentioned eggs, 119 eggs came from the commercial chicken breeds and 312 eggs from traditional local breeds. The quality of eggs for a consumer is represented by its cleanliness, nutritional quality, freshness, and price. A series of measurements is carried out just after their purchase. According to the breed and the marketing channel, highly significant differences (P <0.05) were found in the freshness of the eggs (Haugh units), egg prices, eggs weight, egg shell, the white and the yolk of the egg. Though the chicken breed and marketing channels do not significantly affect (P> 0.05) the freshness of the eggs, however, they have a significant effect (P <0.05) on the size of the eggs marketed in Hanoi. The results of this study show an important diversity in marketing channels and marketed eggs in Hanoi. [less ▲]

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See detailCyclostratigraphic calibration of the Late Devonian time scale
Pas, Damien ULiege; Hinnov, Linda; Day, James E. (Day) et al

in 33 rd INTERNATIONAL MEETING OF SEDIMENTOLOGY, 16ème CONGRÈS FRANÇAIS DE SÉDIMENTOLOGIE (2017, October 13)

The Late Devonian period was affected by major, irreversible changes including two of the most severe biodiversity crises in Earth’s history, the so-called Kellwasser and Hangenberg Events (respectively ... [more ▼]

The Late Devonian period was affected by major, irreversible changes including two of the most severe biodiversity crises in Earth’s history, the so-called Kellwasser and Hangenberg Events (respectively at the Frasnian – Famennian and the Famennian – Carboniferous boundaries). Currently, hypotheses for the Late Devonian extinctions include sea-level fluctuations and regression, climate cooling, ocean anoxia, massive volcanism and/or bolide impact. Unfortunately, testing these hypotheses is impaired by a lack of sufficient temporal resolution in paleobiological, tectonic and proxy climate records. Recent advances in astronomical dating have improved the accuracy of the Frasnian time scale and part of the Famennian (De Vleeschouwer et al., 2012, 2013). However, the time duration of the Famennian stage remains poorly constrained even though this is the key to understanding cause-and-effect relationships of the Late Devonian greenhouse–icehouse transition and the onset of the end Famennian glaciation that ultimately led to the Hangenberg Event at the Devonian–Carboniferous boundary. During the Late Devonian an epieric sea in mid-continent North America occupied the Illinois Basin onto which a Late Frasnian – Early Carboniferous sequence of deep-shelf deposits was archived. A complete record of this sequence, mainly composed of marl, organic-rich shale, silty-shale and carbonate, is captured in three overlapping cores stored in the Iowa Geological Survey (H-30, Sullivan Slough and H-32). H-30 records the Frasnian-Famennian boundary, the Sullivan Slough covers almost all the Famennian (middle triangularis-upper expansa conodont zones) and H-32 spans the junction between the uppermost Famennian and lowermost Carboniferous. To have the best chance of capturing Milankovitch cycles (long- and short-eccentricity cycles as well as obliquity and precession), 2200 rock samples were collected at 5-cm intervals across the entire sequence. Magnetic susceptibility (MS) was measured on each sample and the preservation of paleoenvironmental/climatic information into the signal was verified through geochemical analyses (Ti, Al, Zr by XRF) and magnetic measurements (low temperature magnetic susceptibility and IRM acquisitions). Correlation and overlap between each core was made using available conodont biostratigraphy and then refined by comparing the trends in the MS and δ13C signals for critical intervals. To estimate the duration of the Famennian stage we applied multiple techniques on the MS signal (multitaper method, evolutive harmonic analysis and adaptive-weighted harmonic F-test). By combining these techniques, we identified highly stable 405-kyr cycles across the Sullivan Slough and the H-32 cores. 405-kyr cycles were not observed in H-30, but 100-kyr cycles were identified. A preliminary estimate of the duration for the Famennian stage using the 405-kyr cycle as chronometer constrains the duration of the Famennian stage to 13 ± 0.4 Myr with an average sedimentation rate of 0.5 cm/kyr across the sequence. [less ▲]

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See detailRab guanine nucleotide exchange factor 1 (Rabgef1) restricts intestinal inflammation by limiting pro-inflammatory signals in Intestinal Epithelial Cells (IECs)
El Abbas, Sophie ULiege; Beguin, Charline ULiege; Schyns, Joey ULiege et al

in Proceedings: 4th FARAH-DAY (2017, October 13)

Rab guanine nucleotide exchange factor (GEF-)1 (Rabgef1), a multifunctional protein whose in vivo functions remained unknown until recently, is highly expressed in mouse and human epithelial cells. The ... [more ▼]

Rab guanine nucleotide exchange factor (GEF-)1 (Rabgef1), a multifunctional protein whose in vivo functions remained unknown until recently, is highly expressed in mouse and human epithelial cells. The aim of this study is to investigate the role of Rabgef1 in intestinal epithelial cells (IECs) and intestinal homeostasis in mice. We performed conditional deletion of Rabgef1 gene using the cre-lox system to obtain mice lacking Rabgef1 specifically in IECs (Rabgef1IEC-KO), under the wild-type (WT) or the colitis-prone Interleukin-10 (Il-10)-deficient background. In addition, we used the CRISPR-Cas9 technology to obtain a murine IEC line deficient in Rabgef1. Rabgef1IEC-KO mice under the WT background did not develop spontaneous intestinal abnormalities but exhibited an altered intestinal microbial composition associated with minor changes in IEC pro-inflammatory gene expression profile. Moreover, Rabgef1IEC-KO mice exhibited an increased susceptibility to inflammation in a dextran sodium sulfate (DSS)-induced model of colitis under the WT background, as well as in a constitutive model of colitis under the Il-10-¬deficient background. In vitro, we showed that mouse IECs lacking Rabgef1 significantly overexpressed several pro-inflammatory cytokines and chemokines as compared to control cells. Taken together, these results support that Rabgef1 acts as a regulator of intestinal homeostasis and inflammation, and that dysregulated Rabgef1 expression could contribute to intestinal barrier dysfunction in inflammatory conditions of the gut. [less ▲]

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