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See detailDeriving cultural heritage values: the use of social media
Ginzarly, Manal ULg; Teller, Jacques ULg

in Old and New Media for the Image of the Landscape (2016, October 28)

Nel 2011 l’UNESCO ha adottato la Raccomandazione sul Paesaggio Storico Urbano che mira al riconoscimento e all'identificazione della stratificazione e dell'interconnessione dei valori - naturali e ... [more ▼]

Nel 2011 l’UNESCO ha adottato la Raccomandazione sul Paesaggio Storico Urbano che mira al riconoscimento e all'identificazione della stratificazione e dell'interconnessione dei valori - naturali e culturali, materiali e immateriali, internazionali e locali – riscontrabili in qualsiasi città storica, concepita come un “patrimonio vivente” delle comunità. In tale visione il patrimonio culturale urbano è un elemento riconosciuto non solo dagli esperti, ma dalle intere società che ne valutano gli elementi identitari mirando a conservarli per le generazioni future. La Raccomandazione, in particolare, sostiene che per l'interpretazione e la conservazione del patrimonio culturale si può beneficiare di metodi di valutazione tradizionali e di metodi innovativi basati su dati geo-localizzati e sui dati digitali dei social media, come tweets geo-localizzati, impronte digitali e foto su Flickr. Il presente contributo illustra una metodologia basata sull’analisi delle immagini su Flickr. Dai risultati ottenuti si è evinto che proprio l’indagine dei social media può contribuire ad una comprensione significativa dei valori culturali del contesto urbano, fornendo così la possibilità di una migliore integrazione dei valori socio-culturali riconosciuti dalla collettività nei processi di conservazione e di pianificazione urbana. [less ▲]

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See detailLes masques de Sartre: de l'anthropologie à Frantz Fanon et Hubert Lyautey
Cormann, Grégory ULg

Conference (2016, October 28)

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See detailDECONSTRUCTING LANDSCAPE IN THE MIND OF PEOPLE: AN EXPLORATION OF EVERYDAY AND WIND ENERGY LANDSCAPES
Vanderheyden, Vincent ULg

Doctoral thesis (2016)

In the 19th century, geography was defining itself as the science of landscape, led by German and French schools. Other disciplines were also interested in landscape, each one with its own definition(s ... [more ▼]

In the 19th century, geography was defining itself as the science of landscape, led by German and French schools. Other disciplines were also interested in landscape, each one with its own definition(s). In public policy, landscape has remained, for a long time, a heritage object to be protected (e.g. cultural landscapes of UNESCO). In 2000, the European Landscape Convention, which aims to safeguard the European landscape diversity, proposed a common definition. This includes the idea of areas perceived by people. One of the recommendations of the Convention is the call to focus on other landscapes that only heritage landscapes, such as everyday landscapes and degraded landscapes. The convention also calls for better management and planning practices towards landscape changes. Today, landscape is often invoked as arbitrator in territorial disputes. This is the case in discussions for the installation of wind farms. Newcomers and farmers ‘visions on landscape are often opposed: idyllic landscape for living and recreation for the firsts, working environment for the seconds. Despite the European Landscape Convention, many grey areas remain about how to achieve its goals. Long before it, leading researchers called for a better interest in everyday landscapes. Yet they remain the poor relation in landscape research, to the benefit of natural, wild landscapes. Many uncertainties also remain on how non-specialists perceive their ordinary landscapes and how they have appropriated the landscape concept. The research helps to fill this double gap, deconstructing the concept through the lens of ordinary landscape. With several research questions, I plan to explore what is the landscape in people’s mind, how they conceptualize it, how they think it and how they question their own views on landscape. I will show how these conceptualizations and thoughts are shaped by the living environment, which often provides the tools necessary to the apprehension of the landscape. I will analyse how new elements such as wind farm can disrupt these patterns. The first part of the research is dedicated to the overall perception of their ordinary landscapes by Belgians, especially facing the issue of wind energy. Using a photo-questionnaire survey, we surveyed a representative sample of the Belgian population (n = 1542). Based on this investigation a model was developed. It highlights the positive influence of forest cover and the lack of anthropogenic elements, but also the negative influence of its urbanization and too flat relief on landscape attractiveness. The influence of wind turbines has to be qualified according to the landscape in which they are implanted. In landscapes strongly marked by the human footprint, they seem perceived as increasing the landscape attractiveness. In unspoilt landscapes, they seem rather to contribute to their degradation. These global findings are nuanced in further research. Deeper analysis shows that Flemish people have a more positive view of the landscape than Walloons. I hypothesize a decisive influence of the local context. Indeed, Flemish landscapes are generally more urbanized and marked by man than most of the Walloon landscapes. The building of wind farms seems to change or even reverse the situation. The analysis also shows significant influences related to educational level and gender. Anthropogenic landscapes are less disregarded by low educated people. Women seem to attach importance to stewardship and landscape maintenance. In contrast, although suspected, age influence has not been formally demonstrated. The second part of this dissertation, the cornerstone of this doctoral research, aims at deconstructing the landscape concept in the mind of people. In this part, wind farms are no longer considered as a case study, but as a leitmotif. I deeper surveyed smaller groups (n = 54) in three areas of Wallonia (Walloon Picardy, between the Sambre and Meuse rivers, and Ardennes) with qualitative techniques. This survey was conducted five years after the first. The analysis of the vocabulary used by the regional sub-groups shows that people are not equipped the same way for analysing landscapes. The experience of living environment seems to be crucial in providing analytical keys. Thus Ardennes people seem better equipped to talk about the forest, marking their landscapes, while the Picards seem more loquacious about their iconic cultivated landscapes. The research also highlighted different landscape analysis patterns. Some people ordered landscapes according to their degree of naturalness, the less spoiled landscapes being the most attractive. On the contrary, fewer attach importance to landscapes where human footprint is clearly visible. Some respondents remain in a purely aesthetic landscape analysis, while others project themselves into the landscape, imagining they are performing different actions. Depending on their interests, these actions influence the perception of one same landscape. Research shows that this overall pattern analysis is disturbed by various factors. The recognition of certain places transformed landscape analysis in an analysis of the place, with the emotional changes that this entails. The position of the participants facing wind energy projects also appears sharper. In the time between the two parts of the research, Wallonia has experienced unprecedented wind development; opinions have therefore had time to form. This was not yet totally the case during the first survey. Beyond these major disruptions, the research also shows clear influences of the ordered character of landscapes, their living character and variety of land uses. The research also highlights the influence of non-visual criteria such as noise or odours detectable in the landscape. In conclusion, the research shows that respondents often show a sense of landscape, weaker than sense of place and stronger than aesthetic. [less ▲]

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See detailDas Ende der Phantomschmerzen. Die Bundesrepublik und "Eupen-Malmedy"
Brüll, Christoph ULg

Scientific conference (2016, October 28)

Eigentlich liegt der Fall klar: nach der Befreiung im Herbst 1944 wurde das kleine Grenzgebiet von Eupen-Malmedy, das im Mai 1940 vom „Großdeutschen Reich“ annektiert worden war, wieder belgisch. Der ... [more ▼]

Eigentlich liegt der Fall klar: nach der Befreiung im Herbst 1944 wurde das kleine Grenzgebiet von Eupen-Malmedy, das im Mai 1940 vom „Großdeutschen Reich“ annektiert worden war, wieder belgisch. Der deutsch-belgische Ausgleichsvertrag vom September 1956 bekräftigte dies nochmals. Doch wurde diese offizielle Position zwar im Bonner Auswärtigen Amt vertreten, jedoch nicht von allen Ministerien geteilt. Vor allem durch das Bundesministerium für Gesamtdeutsche Fragen erfolgte nach 1949 eine „Betreuung“ für die Minderheit, die Fragen nach den Kontinuitäten zur Vorkriegszeit aufwirft. Wenn auch die belgische Souveränität in den „Ostkantonen“ nicht mehr offen infrage gestellt wurde, fand dort in kleinem Umfang eine geheim gehaltene „Förderung“ kulturpolitischer Tätigkeiten statt – auch weil der belgische Staat nur wenige finanzielle Mittel bereitstellte. Erst mit der sich anbahnenden Schaffung einer „deutschen Kulturgemeinschaft“ im Zuge der ersten Verfassungsrevision in Belgien und nach dem Eintritt der SPD in die Bundesregierung wurde diese finanzielle Hilfe Ende der 1960er Jahre eingestellt. An ihre Stelle traten nunmehr deutsche Stiftungen, was Ende der 1980er Jahre zu einem politischen Skandal in der heutigen Deutschsprachigen Gemeinschaft führte. Der Vortrag fragt nach der Bedeutung von „Eupen-Malmedy“ für das deutsch-belgische Verhältnis seit 1945 und zeigt die Schwierigkeiten für die westdeutschen Akteure, eine auswärtige Kulturpolitik zu konzipieren und dabei die Fallen der Vergangenheit zu vermeiden. [less ▲]

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See detailAccidents aériens: Principes d’intervention psychosociale et de prise en charge des victimes selon le modèle belge
Garcet, Serge ULg; Gillard, jean-françois

Conference given outside the academic context (2016)

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See detailAssessment of fodder biomass in Senegalese rangelands using earth observation and field data
Diouf, Abdoul Aziz ULg

Doctoral thesis (2016)

Senegalese livestock size has largely increased during the last three decades in relation to the population growth. The fodder biomass stock available at the end of the growing season, therefore, becomes ... [more ▼]

Senegalese livestock size has largely increased during the last three decades in relation to the population growth. The fodder biomass stock available at the end of the growing season, therefore, becomes increasingly limited to meet feeding needs of pastoral livestock which provides third of the national agricultural wealth. With the reduction of natural grazing lands mostly generated by the expansion of croplands, and the reduction of fodder biomass production due to drought effects, the increase of the livestock size leads to the rangelands overload whose persistence can lead in turn to their degradation. A technique based on a simple linear relationship between the temporal integration of the Normalized Difference Vegetation Index (NDVI) and the ground biomass data, developed in the 1980s, has been operationally applied by the Centre de Suivi Ecologique (CSE) of Dakar (Senegal) to assess the fodder biomass available in rangelands at the end of the growing season. The derived map of total biomass production enables to help pastoral livestock managers as well as national stakeholders against food insecurity and natural resources degradation. Carried out annually, this approach comprises unfortunately some uncertainties as: (1) the saturation drawback of NDVI in areas with high biomass productivity, (2) the temporal scale which is restricted to biomass data of the ongoing year not being used again in the following year, (3) the low predictive ability due to the large time gap between data collection and published results, and (4) the high costs for annual data collection. In addition, although the earth observation (EO) data have largely progressed during the last three decades, this technique has not changed over this period and consequently is not state-of-the-art. To tackle these limitations and advance the traditional method, new statistical models that include new earth observations datasets and historical in situ plant biomass data were developed for estimating and / or predicting the forage availability at the end of the growing season in Senegalese semi-arid rangelands. A backward analysis of the linear regression approach currently applied in Senegal provided evidence that nonlinear regression functions such as Exponential and Power are more suited to estimate the end-of-season total biomass in this region using annual data solely. A completely new methodology using multiple-linear models which include various phenological metrics from the time series of the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) and 14 years of in situ total biomass samples was developed. The proposed approach provided more reliable and accurate estimates as compared to the current CSE biomass product. Multiple-linear models developed with specific metrics adapted to ecosystem properties increased the overall accuracy of the fodder biomass estimates and mitigated the saturation of FAPAR obtained with models run across the whole study area. With this new approach, timely information about possible deficits/surplus of total fodder biomass can be provided to stakeholders using phenological metrics that are available relatively early in the growing season. Another new approach based on a machine learning algorithm (i.e., Cubist) was developed, as never done before, to assess herbaceous biomass in Senegalese Sahel. Three Cubist models using FAPAR seasonal metrics and/or agrometeorological variables (i.e., soil water status indicators) were established and compared. The Cubist model including both FAPAR and agrometeorological variables provided the best estimation performance. This model enabled to mitigate the saturation affecting optical remotely sensed vegetation data in areas of high plant productivity as well as the discrepancy between herbaceous biomass and greenness, and corrected therefore for herbaceous biomass underestimations observed with the sole FAPAR based model, particularly in sparsely vegetated areas. In contrast to the date of the growing season onset retrieved from FAPAR seasonal dynamics, the rainy season onset was significantly related to the herbaceous biomass and its inclusion in models could constitute a significant improvement in forecasting risks of fodder biomass deficit. The methods developed in this research provide tools to assess Senegalese forage resources at two levels: herbaceous and total fodder biomass (Herbaceous + woody leaf biomass). They require limited data and free available software and therefore can be easily replicated in other countries of the West African Sahel. [less ▲]

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See detailEffects of interactions on the relaxation processes in magnetic nanostructures
Atkinson, Lewis; Ostler, Thomas ULg; Ondrej, Hovorka et al

in Physical Review. B: Condensed Matter and Materials Physics (2016), 94

Controlling the relaxation of magnetization in magnetic nanostructures is key to optimizing magnetic storage device performance. This relaxation is governed by both intrinsic and extrinsic relaxation ... [more ▼]

Controlling the relaxation of magnetization in magnetic nanostructures is key to optimizing magnetic storage device performance. This relaxation is governed by both intrinsic and extrinsic relaxation mechanisms and with the latter strongly dependent on the interactions between the nanostructures. In the present work we investigate laser induced magnetization dynamics in a broadband optical resonance type experiment revealing the role of interactions between nanostructures on the relaxation processes of granular magnetic structures. The results are corroborated by constructing a temperature dependent numerical micromagnetic model of magnetization dynamics based on the Landau-Lifshitz-Bloch equation. The model predicts a strong dependence of damping on the key material properties of coupled granular nanostructures in good agreement with the experimental data. We show that the intergranular, magnetostatic and exchange interactions provide a large extrinsic contribution to the damping. Finally we show that the mechanism can be attributed to an increase in spin-wave degeneracy with the ferromagnetic resonance mode as revealed by semianalytical spin-wave calculations. [less ▲]

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See detailNew insights into the tropospheric sources of formic acid
Franco, Bruno ULg; Taraborrelli, Domenico; Schultz, Martin G.

Scientific conference (2016, October 28)

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See detailLacunes extrinsèques et effets au contentieux préjudiciel : lorsque la Cour de cassation fait d'une pierre deux coups
Pironnet, Quentin ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2016), 35(2016), 1652-1658

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See detailPalynology and palaeogeography of the middle Přídolí from Saudi Arabia
Steemans, Philippe ULg; Breuer, P.; Al-Hajri, S. et al

Conference (2016, October 27)

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See detailOccurrence and significance of minute palynomorphs of marine and non - marine origin in the Middle Ordovician from Saudi Arabia
Le Hérissé, A.; Guidat, C.; Not, F. et al

Conference (2016, October 27)

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See detailSilurian palynomorphs from the Precordillera basin, western Argentina: biostratigraphy and diversity trends
Garcia Muro, V.J.; Rubinstein, C.V.; Steemans, Philippe ULg

Poster (2016, October 27)

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See detailLes 10 ans d’Envol à l’école Saint-Pierre : La musique et le conte au centre des apprentissages et du vivre ensemble dans les classes
Gavray, Claire ULg

Conference (2016, October 27)

historique du projet, évaluation des apports et perspectives

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See detailPlant functional trait diversity in wildflower strips: the key to promote pollinators in agricultural landscapes?
Uyttenbroeck, Roel ULg; Piqueray, Julien; Monty, Arnaud ULg

Conference (2016, October 27)

Creating wildflower strips is often suggested as a tool to support pollinator diversity in agricultural landscapes and to promote crop pollination service. The choice of the plant species to sow in flower ... [more ▼]

Creating wildflower strips is often suggested as a tool to support pollinator diversity in agricultural landscapes and to promote crop pollination service. The choice of the plant species to sow in flower strips can influence the effectivity of the strips in supporting pollinators. While it has already been shown that increasing plant species diversity is beneficial for ecosystem services, it is often suggested that plant functional traits and functional trait diversity are the key for this relationship. We created a replicated field experiment with different levels of plant functional diversity in wildflower strips in Belgium to test the effect on the flower-visiting pollinator community. We sampled plant-pollinator interaction networks during 2 years and assessed how the plant functional diversity affected the network structure. Plant functional diversity did not have a clear effect on visiting pollinator species richness, however a different interaction pattern was observed with different functional diversity level. Pollinators in wildflower strips with higher functional diversity had less overlap in their ecological niche, while network stability and robustness for secondary extinctions were not affected. We discuss implications for wildflower strip design. [less ▲]

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See detailNew features in SAFIR® 2016 - SWS 2016
Franssen, Jean-Marc ULg; Gernay, Thomas ULg

Scientific conference (2016, October 27)

Presentation of the new capabilities and developments in the version 2016 of SAFIR, a non linear software dedicated to the analysis of the behaviour of structures in fire.

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See detailBollywood et les limites du soft power indien
Vlassis, Antonios ULg

in Telos (electronic journal) (2016)

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See detailL'Union européenne ou la désunion des valeurs
Bouhon, Frédéric ULg; Wildemeersch, Jonathan ULg

Scientific conference (2016, October 27)

Cette intervention visait à introduire l'exposé des ministres hongrois Laszlo Trocsanyi et polonais Aleksander Stepkowski. Les auteurs adressent une série de questions en lien avec les évolutions ... [more ▼]

Cette intervention visait à introduire l'exposé des ministres hongrois Laszlo Trocsanyi et polonais Aleksander Stepkowski. Les auteurs adressent une série de questions en lien avec les évolutions politiques et juridiques que connaissent la Hongrie et la Pologne, tant sur le plan interne (réformes électorales, réformes des juridictions constitutionnelles, mises en cause de certaines droits fondamentaux) que dans leurs relations avec l'Union européenne. [less ▲]

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See detailQuelques réflexions à propos du régime de (dé)fiscalisation des revenus des PME dans le système fiscal belge
Bourgeois, Marc ULg

in Aydogdu, Roman (Ed.) Les petites et moyennes entreprises dans le droit des affaires (2016, October 27)

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