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See detailStudy of the evolution of the osteoarthritis pathology and the mechanical properties of cartilage in a spontaneous osteoarthritis model in the Dunkin-Hartley guinea pigs.
Legrand, Catherine ULg; Centonze, Prescilia ULg; Comblain, Fanny ULg et al

Poster (2017, April 27)

In animal models, the severity of cartilage damage is assessed by histological scores evaluating the structure, the proteoglycan content, the integrity of the tidemark, the cellularity, and osteophytes ... [more ▼]

In animal models, the severity of cartilage damage is assessed by histological scores evaluating the structure, the proteoglycan content, the integrity of the tidemark, the cellularity, and osteophytes. In parallel to these histological analyzes, we studied the mechanical properties of cartilage at different stages of disease progression in the Dunkin-Hartley guinea pigs. We also correlated the severity of histological lesions with the mechanical properties of cartilage. [less ▲]

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See detailLorrAgri: methodology and experience of a territorial transition lab
Feyereisen, Marlène ULg

Conference (2017, April 27)

Many scholars have underlined the potential of spatialized (or territorialized) approaches to analyse and guide the transition of the agrifood system. For example, scale reductions often associated with ... [more ▼]

Many scholars have underlined the potential of spatialized (or territorialized) approaches to analyse and guide the transition of the agrifood system. For example, scale reductions often associated with territorialisation offers the opportunity to modify power relations between actors and permits to improve their ability to act – or empower. While territorialized approaches to transition management are promising, to date only few studies have considered these aspects in unison. This study presents the methodology used to design and guide a transition management experience. We describe the tools used, issues raised, and potential benefits of the experience for transition, as well as challenges and limitations. Furthermore, we investigate how tools from transition theories were able to support the experience (multi-level perspective, transition management and strategic niche management). LorrAgri is a “territorial transition lab” organised from early 2016 until present day, and aims to develop the local agrifood system (in particular vegetables) in the rural area of Belgian Lorraine in the South of Belgium. This area has relatively well-developed non-conventional agriculture compared to the rest of Belgium, and recently developed market gardening. The present work is based on extensive data selection, including semi-structured interviews and participant observations. Strategic analysis sociology was used to identify possible strategies and challenges between actors of the agrifood system in the selected territory. From these diagnostics of the territory and its actors, the LorrAgri group was created in January 2016, initially with market gardeners. Over time, organisations joined also (both from the regime and niches) which work on local agrifood development, culminating today in the active support and involvement of local politics. Analyses were conducted at several of these stages, and fed by inputs from transition theories. Our study shows that the territorialized approach can enable cooperation between actors which oppose each other, in terms of norms and values. Therefore, LorrAgri is an interesting case study to analyse modes of cooperation between actors e.g. from the regime and the niches, and how norms and values from different levels can influence each other (transition in-the-making). This study also details how participants found a common objective for developing the local agrifood system, namely to supply local products to collective catering, e.g. school canteens and restaurants. [less ▲]

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See detailNutritional and organoleptic quality of Beni-Guil lamb meat breeding in eastern Morocco
Belhaj, Kamal ULg; Mansouri, Farid; Sindic, Marianne ULg et al

Poster (2017, April 27)

Nowadays in Morocco, 98% of red meat production is ensured by cattles, sheeps and goast. The eastern Morocco represents one of the main sheep farming areas, characterized by the specificity of its ... [more ▼]

Nowadays in Morocco, 98% of red meat production is ensured by cattles, sheeps and goast. The eastern Morocco represents one of the main sheep farming areas, characterized by the specificity of its production systems. So it is well known by the quality of the sheep meat produced. The Beni-Guil breed is a dominate breed in this breeding area, labeled Protected Geographical Indication (PIG). Thus, it’s an important protein source for the population in this geographical site and highly appreciated by consumers. This reputation is limited to the hedonic quality, and there is currently no scientific data available on the organoleptic and nutritional quality of Beni-Guil meat. The objective of this research is to give a scientific point on the nutritional and organoleptic quality of this meat by biochemical analyzes of the major and minor composition of the Longissimus dorsi muscle (LDM). The results of the organoleptic quality analysis show that the meat of Beni-Guil breed has a bright red color, with a chromaticity of 23.97, an a/b ratio of 0.96 and a hue angle of 46.47, Significant juiciness with a water retention capacity and cooking loss of 22.73 and 32.87% respectively, and a marked tenderness with a collagen content of 0.1%. Thus the analysis of nutritional quality showed that LDM of the Beni-Guil has a high nutritional and dietary value, rich in polyunsaturated fatty acid (PUFA) and essential amino acid, with an PUFA/SFA ratio of 0.25, a ratio PUFA n-6/PUFA n-3 of 3.78, and a Protein Digestibility-Corrected Amino Acid score (PDCAAS) of 127. [less ▲]

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See detailGénéralisation et raisonnement analogique chez les enfants porteurs de dysphasie
Krzemien, Magali ULg

Scientific conference (2017, April 27)

Cette présentation s’intéressera aux capacités de généralisation des enfants porteurs de dysphasie. Nous aborderons tout d’abord les études démontrant que ces enfants présentent des difficultés de ... [more ▼]

Cette présentation s’intéressera aux capacités de généralisation des enfants porteurs de dysphasie. Nous aborderons tout d’abord les études démontrant que ces enfants présentent des difficultés de productivité et de créativité syntaxique et sont davantage dépendants de l’input auquel ils sont confrontés. Ces difficultés semblent également être présentes au niveau de l’acquisition lexicale. Nous verrons ensuite que la capacité à créer des analogies semble être un processus essentiel à la généralisation. Or, plusieurs études mettent en évidence un déficit de raisonnement analogique dans la dysphasie, en particulier dans des situations plus complexes et abstraites. Un possible lien entre le raisonnement analogique, la généralisation et le langage dans la dysphasie sera donc envisagé. Nous terminerons en envisageant l’influence de la variabilité sur la généralisation et l’extension de ces hypothèses aux enfants porteurs de troubles du spectre autistique. [less ▲]

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See detailLa force des mots. Mémoire et Shoah au XXIe siècle
Grandjean, Geoffrey ULg

Conference given outside the academic context (2017)

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See detailCaractérisation et élaboration d'un outil de surveillance des cuvettes oasiennes et de leurs alentours par télédétection et système d'information
Karimou Barké, Mahamadou Salifou ULg

Doctoral thesis (2017)

Situées en zone semi-aride, les cuvettes oasiennes du centre-est du Niger sont des agro-écosystèmes à hautes potentialités. C’est seulement à l’intérieur de ces dernières que l’agriculture est possible ... [more ▼]

Situées en zone semi-aride, les cuvettes oasiennes du centre-est du Niger sont des agro-écosystèmes à hautes potentialités. C’est seulement à l’intérieur de ces dernières que l’agriculture est possible durant toute l’année. Ces cuvettes oasiennes ont connu de nombreux investissements de la part de plusieurs ONGs et projets au cours des dernières années. Cependant, elles sont souvent peu connues par ces acteurs du développement du fait de leur grand nombre et de leur extrême diversité. Cette thèse cherche à réduire cette méconnaissance à travers les activités suivantes: • évaluer les performances de trois méthodes de classification d’images appliquées à la détection de ces cuvettes oasiennes dans le Département de Gouré. Ces méthodes sont l’analyse pixellaire, l’analyse texturale et l’analyse par objet. Elles sont appliquées à des images SPOT 5-THX de 2.5 m de résolution ; • caractériser la forme des cuvettes oasiennes avec deux indices morphologiques (l’indice de compacité de Gravelius et l’indice fractale de leurs contours) ainsi que leurs orientations en utilisant les secteurs de la rose de vent comme repères ; • évaluer les contraintes et potentialités liées aux unités de paysage des cuvettes et de leurs alentours pour l’ensemble des cuvettes oasiennes à partir des extensions de ces unités de paysage, élaborer des indicateurs spatiaux de caractérisation des cuvettes ; • analyser la dynamique de l’occupation des sols de cuvettes oasiennes et de leurs alentours en utilisant les images Landsat 5-TM de 1984, les images SPOT 3 de 1996 et les images SPOT 5-THX de 2013. • proposer un outil de monitoring et une esquisse de système expert orienté à partir des données récoltées par ce biais sur l’ensemble des cuvettes de la zone d’étude. L’évaluation des résultats montre que l’approche par objet (précision globale égale à 97.12%, coefficient Kappa égal à 0.97) est plus performante que celles utilisant la texture (précision globale égale à 89.61%, coefficient Kappa égal à 0,90) et l’analyse par pixel (précision globale égale à 80.58 %, coefficient Kappa égal à 0.80). Une première information originale, à savoir le nombre, la position et la surface de l’ensemble des cuvettes sur la zone d’étude est fournie. Le nombre total de cuvettes oasiennes dans le Département de Gouré est ainsi estimé à 10717. Cet inventaire de ces lieux stocks de ressources est une première étape obligatoire pour leur caractérisation morphologique et pour l’évaluation de leurs potentialités agricoles. L’indice de forme de Gravelius met en évidence une certaine diversité de leurs contours : des cuvettes circulaires (9%), ovales (47%), amiboïdes (11%), étirées (18%) et très étirées ou étirées-amiboïdes (16%). La dimension fractale permet de distinguer trois classes de cuvette selon le degré de lissage de ces contours : très lissées (39%), lissées (50%) et moyennement lissées (10%). Le lissage est interprété ici comme un indicateur d’éolisation des pourtours des cuvettes. Enfin la détermination de l’orientation des grands axes des cuvettes a permis d’identifier quatre secteurs majeurs : E-W (23%), N-S (21%), NE-SW (22%) et SE-NW (34%). Ces analyses morphologiques et d’orientation appliquées pour la première fois à l’ensemble des cuvettes oasiennes du Département de Gouré offrent des éléments permettant de comprendre les processus d’ensablement des cuvettes oasiennes dans cette zone. L’analyse des indicateurs des potentialités naturelles à la mise en valeur agricole montre que les cuvettes oasiennes sont des espaces multi-usages, avec des aptitudes en arboriculture, maraîchage, en natron et en foresterie selon les unités géomorphologiques. Le pourcentage des surfaces cultivables est faible pour 45.8% des cuvettes et fort à très fort pour seulement 3.9 %. Celui des surfaces boisées est très fort sur 61.6 % des cuvettes soit 51.4 % en superficie. Les cuvettes possédant un sol nu à natron et/ou une nappe d’eau affleurante représentent 17.6 % des cuvettes. Quant aux indicateurs de risque de dégradation, ils montrent que 3.3 % et 0.5 % des cuvettes ont respectivement une menace d’ensablement fort et très fort à moyen terme. Alors qu’à terme immédiat, c’est respectivement 3% et 0.8 % des cuvettes dont la menace d’ensablement est fort et très fort. Concernant l’évolution récente de ces milieux, les superficies des cuvettes oasiennes ont régressé de 46783 ha en 1984, à 40831 ha en 1996 et 34553 ha en 2013. Inversement, leur nombre a augmenté de 1984 (8911) à 2013 (10717). Ceci s’explique certes pour partie par les résolutions différentes des images satellitaires utilisées, mais surtout par la fragmentation de certaines cuvettes du fait de leur dégradation et la création de nouvelles cuvettes par l’érosion éolienne. Cette dynamique est accentuée par celle de l’occupation humaine des paysages. Les abords des cuvettes et des vallées sèches constitués souvent d’édifices dunaires sont de plus en plus occupés par les cultures pluviales qui les exposent davantage à l’érosion. En 1984, les édifices dunaires et vallées sèches à culture pluviale représentent 295697 ha alors, qu’en 1996 et 2013, elles occupent respectivement 368153 ha et 423876 ha. Les systèmes d’information à référence spatiale esquissés permettent d’observer et de suivre la totalité des cuvettes oasiennes. Ce système, conçu en utilisant le langage UML, a permis non seulement d’établir des relations entre les indicateurs de potentiel valorisable et de dégradation mais aussi des informations supplémentaires récoltées sur le terrain (village, marché, zone de fixation biologique et mécanique des dunes). Ils offrent un accès aisé à ces indicateurs grâce à une interface informatique. À travers des requêtes sur cette base de données, les cuvettes à menace très forte nécessitant une intervention urgente pour leur conservation ont été mises en évidence ainsi que les variables explicatives du niveau d’exploitation des cuvettes. [less ▲]

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See detailMeeting Fronstage, Deciding Backstage
Slomian, Cynthia ULg

Conference (2017, April 27)

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See detailThe Emotional Dimension of the Judicial Process
Colemans, Julie ULg

Scientific conference (2017, April 27)

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See detail“New Ways of Working” and their managerial myths: the resurgence of liberation and distributed surveillance?
Jemine, Grégory ULg

Conference (2017, April 27)

Through this contribution we aim to explore how two well-known bodies of knowledge, namely the panopticism as developed by Foucault (2012) and the works from the Human Relations movement (Mayo, 1949) are ... [more ▼]

Through this contribution we aim to explore how two well-known bodies of knowledge, namely the panopticism as developed by Foucault (2012) and the works from the Human Relations movement (Mayo, 1949) are being reprocessed and reinjected by managerial actors in organisational projects of “modernisation” such as “New Ways of Working”. Nowadays, in open and flexible workspaces, visual and acoustic privacy at work tend to disappear (Van der Voort, 2004) which leaves room for a constant monitoring of employees’ behaviours, mainly performed by the peers (Sewell & Taskin, 2015). The old managerial myth of distributed surveillance resurfaces as everyone is in a position to monitor his colleagues, generating a global feeling of unease. Simultaneously several managerial discourses advocate for abolishing direct supervision and liberating the employees of the bureaucratic factors through self-managed teams and empowerment. The defenders of “freedom” in companies build their argumentation on former findings from the Human Relations movement such as the improved efficiency of small groups and the benefits of removing rules. In an historical perspective, we wonder why and how such elements of knowledge produced several decades ago now become performative in several Belgian companies. [less ▲]

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See detailClimate change and insect pests: Impact on carbon dioxide increase on aphid behavior and semiochemistry
Boullis, Antoine ULg

Doctoral thesis (2017)

There is no longer any doubt on the incidence of rising carbon dioxide (CO2) concentration on global change. Climate modifications are responsible of perturbations in interactions between living organisms ... [more ▼]

There is no longer any doubt on the incidence of rising carbon dioxide (CO2) concentration on global change. Climate modifications are responsible of perturbations in interactions between living organisms. This research topic is in the light of scientists since several decades and is considered to be of major interest in the understanding of future ecosystems’ functioning. In this prospect, interactions between insect herbivores and their natural enemies have received little attention under a climate change scope, while they are of paramount importance in the proper equilibrium of agro-ecosystems. As the efficacy of natural enemies is governed largely by behavioral mechanisms, changes in the predators’ behaviors but also in those related to prey defenses can change the dynamics of insect populations. As aphids are considered as one of the main crop pests in temperate regions, relative literature on impact of increases in atmospheric CO2 concentrations on aphid population dynamic now exists. However, few publications about their chemical ecology are reported. Aphids are using many chemical signals to communicate with each other or in their interactions with higher trophic levels. Here, I tempted to identify the impact of an increase in atmospheric CO2 concentration on the interactions between aphids and their natural enemies mediated by semiochemicals. Aspects of phytovirus transmission by aphids were also covered. After being involved in three literature reviews, I was interested in the aphid alarm signaling which strongly supports aphid-predators interactions. In the pea aphid Acyrthosiphon pisum (Harris), this signaling is mediated by a pheromone, namely the (E)-β-farnesene. For my experiments, I took into consideration the importance of all the steps that this molecule has to pass by, from its production into the emitter individual to the induced behavioral response of the receivers. The results obtained during these experiments highlighted an imbalance in aphid chemical communication for populations grown under elevated CO2 conditions, by modifications in several steps of the signal (decrease in pheromone production, emission and associated behavior). The results obtained here were supported by previous studies indicating that increases in CO2 concentration reduce the aphid escape behavior, which makes them potentially more susceptible to predation. We know that many plant pathogens are dependent on aphid dispersal to spread, so it is of major importance to predict how these insect vectors could be affected by forecasted climate. I thus carried my interest on the ability of aphids to transmit phytoviruses under changing atmosphere. Using another aphid model, the green peach aphid Myzus persicae (Sulzer), we have not observed any modifications in terms of virus and aphid spread in laboratory trials when tested under either actual or forecasted CO2 concentration. However, the viral transmission efficiency via aphids is increased under CO2-enriched atmosphere. Finally, the host searching behavior of an aphid predator was studied. The efficiency of natural enemies of insect pests is mainly driven by their ability to find food sources or oviposition sites in their environment. The conducted study highlighted the preference of the hoverfly Episyrphus balteatus De Geer towards aphid colonies grown under actual CO2 levels, suggesting modifications in chemical cues guiding hoverflies to a suitable oviposition site, due to increase of CO2. The results and knowledge obtained during these studies will add novel information on how a major component of climate change may impact tritrophic interactions and thus the efficiency of natural enemies of insect herbivores in biological control scope. [less ▲]

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See detailPISA expliqué à tous : pistes pour améliorer l'enseignement en FW-B
Lafontaine, Dominique ULg

Scientific conference (2017, April 27)

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See detailImportin-8 could cause CAE/JME by delaying early neuroblast migration
Nganou, Gerry ULg; Tanaka, Miyabi; Coumans, Bernard ULg et al

Poster (2017, April 27)

Abstract : Childhood Absence Evolving to Juvenile Myoclonic Epilepsy (CAE/JME) is an uncommon form of genetic generalized epilepsy that appears as absence in childhood and evolves into generalized ... [more ▼]

Abstract : Childhood Absence Evolving to Juvenile Myoclonic Epilepsy (CAE/JME) is an uncommon form of genetic generalized epilepsy that appears as absence in childhood and evolves into generalized tonic–clonic seizures with myoclonic jerks during adolescence. In some family of patients affected by CAE/JME, mutations have been observed in the gene encoding for the transport protein importin-8 (IPO8). IPO8 could be at the origin of CAE/JME via its role in the transport of its targets (like Ago-2, Smad4, c-Jun). RT-qPCR has shown that IPO8 mRNA is expressed at all ages with no big difference in expression level. Using ISH, a clear expression of mIPO8 mRNA was observed in the sub-ventricular/ventricular zone (SVZ/VZ), the cortical plate (CP) and the ganglionic eminences (GE) of developing brain at E14. Both SVZ/VZ and GE are the “neurogenic niches” that generate glutamatergic and GABAergic neurons respectively. The implication of IPO8 in the generation of “glutamatergic neurons” was investigated by In Utero electroporation (IUE) and MGE Electroporation. Using shRNA, we observed that after 3 days, “glutamatergic neuroblasts” do not reach the CP in contrast to the control condition. This effect can be rescued by the co-expression of a form of IPO8 that is resistant to the shRNA. When overexpressing the pathological forms of hIPO8, but not a variant, migration of “glutamatergic neuroblasts” was also impaired. However, when the observation is made later, i.e. at P5, we observed that the neuroblasts finally reach their correct layer in the cortex, suggesting IPO8 only delayed but not blocked migration. Moreover, shRNA against IPO8 mRNA lead to alteration of interneurons (GABAergic neurons) migration same to overexpression of one mutated form of IPO8. Conclusion : IPO8 is expressed in mouse brain during development. It shows a clear expression during embryogenesis in the “neurogenic niches”. Moreover, IPO8 modulates neuroblasts (radial and tangential) migration in the developing brain. So, abnormal brain development due to IPO8 mutations could be at the origin of CAE/JME. [less ▲]

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See detailPraxis, besoins et impératifs affectifs : Réflexions sur la normativité de la conscience émue.
Recchia, Fabio ULg

Conference (2017, April 26)

L'objectif de cette communication consiste à dégager les caractéristiques normatives de la conscience émue. Nous mobiliserons pour ce faire la thématique des "impératifs affectifs", qui est abondamment ... [more ▼]

L'objectif de cette communication consiste à dégager les caractéristiques normatives de la conscience émue. Nous mobiliserons pour ce faire la thématique des "impératifs affectifs", qui est abondamment discutée par Sartre dans "Les Racines de l'éthique". Sur cette base, nous développerons une réflexion en trois temps. 1° Nous situerons tout d'abord les "Racines de l'éthique" dans la continuité des réflexions de "l'Esquisse d'une théorie des émotions". 2° Nous montrerons ensuite que l'analyse des impératifs affectifs enveloppe une critique du positivisme, qui est une approche massivement adoptée par nombre de philosophie des émotions. 3° Enfin, nous approfondirons la description sartrienne des impératifs affectifs à partir de "L'Émile" de Jean-Jacques Rousseau. L'association de l'un et l'autre texte nous permettra en effet de commenter la "seconde forme d'émotion" qui est très allusivement décrite par les dernières pages de l'Esquisse d'une théorie des émotions. Plus largement, ce détour par la philosophie politique des modernes permettra d'établir un dialogue entre la phénoménologie sartrienne de l'affectivité et l'approche de la normativité qui est proposée par la philosophie française des sciences sociales. [less ▲]

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See detailThe Matrix of Academic Organising. Articulating organisations’ 3Ds and academics’ logics of action
Dubois, Christophe ULg; Dubois-Shaik, Farah

Scientific conference (2017, April 26)

The aim of this paper is twofold. It firstly aims to account for the Matrix of Excellence, Funding and Omnipresence characterizing academic organizations (Dubois-Shaik & Fusulier, 2016), and more ... [more ▼]

The aim of this paper is twofold. It firstly aims to account for the Matrix of Excellence, Funding and Omnipresence characterizing academic organizations (Dubois-Shaik & Fusulier, 2016), and more precisely their constitutive three dimensions: managerial discourse, formal and parallel structures (Friedberg, 2012; Dubois, 2014). Secondly, drawing on the metaphor of shadow organizing (Gherardi et al., 2017), we will illustrate some informal coping mechanisms occurring in the parallel structure of academic organizations. We will then discuss how these coping mechanisms are or are not being translated in managerial discourse and inscribed in formal structures. [less ▲]

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See detailBaromètre financier du secteur Transport et Logistique : évolution et perspectives
Lambert, Marie ULg

Conference given outside the academic context (2017)

Detailed reference viewed: 28 (1 ULg)
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See detailFirst retrievals of methane isotopologue, CH3D, from FTIR ground-based observations
Bader, Whitney ULg; Strong, Kimberley; Walker, Kaley et al

Poster (2017, April 26)

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See detail4th Doctoral Seminar on Sustainability Research in the Built Environment Book of Abstracts
Attia, Shady ULg; Teller, Jacques ULg; Mahy, Grégory ULg

Book published by SBD Lab (2017)

The DS2BE is a joint initiative of research groups working on sustainability issues at 8 Belgian universities: ULBruxelles, VUBrussel, KULeuven, UCLouvain, ULiège, UHasselt, UAntwerpen and UGent ... [more ▼]

The DS2BE is a joint initiative of research groups working on sustainability issues at 8 Belgian universities: ULBruxelles, VUBrussel, KULeuven, UCLouvain, ULiège, UHasselt, UAntwerpen and UGent. Conceived as a platform for PhD researchers whose work engages the built environment at different scales in the framework of sustainability, these seminars provide an excellent opportunity for the doctoral students of the partner institutions to present their ongoing research. They will get feedback from a broad panel of sustainability experts, including invited specialists and peers, for furthering their research. PhD candidates can provide submissions that concern topics, such as: - Sustainable Architecture and Resources, materials, re-cycling /re-use, building elements and envelope, building physics, building construction technology, building renovation, drawing lessons from vernacular, bioclimatic design, regenerative design, biomimetic and integrated design, …, - Sustainability theory, sustainability / environmental assessment at building and neighborhood scales, and at the scale of city and regions, - Sustainable urbanism, urban form, landscape and urban ecology, urban green infrastructure and ecosystem services, public space, density, urban infrastructure & transportation, water urbanism, retrofitting of buildings to the built environment, - Methodologically oriented PhDs focusing on issues related to LCA (Life Cycle Analysis), I-O (Input-Output Analysis), MFA (Material Flow Analysis), simulation techniques, to exploring urban metabolism, industrial ecology, environmental modelling, GIS-based land-use change modelling, to Research by Design. [less ▲]

Detailed reference viewed: 118 (8 ULg)