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See detailMédias et éditorialistes belges en temps de crise : quels discours face aux politiques d'austérité ?
Geuens, Geoffrey ULg

Conference given outside the academic context (2014)

Detailed reference viewed: 65 (6 ULg)
See detailCopropriété, superficie et emphytéose
Lecocq, Pascale ULg

Scientific conference (2014, December 13)

Detailed reference viewed: 28 (1 ULg)
Peer Reviewed
See detailTuta absoluta (Lepidoptera: Gelechiidae) ability to localize and develop on wild and cultivated solanaceous plant species
Bawin, Thomas ULg; Dujeu, David ULg; Fagan, Maud ULg et al

Conference (2014, December 13)

The tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), is a widespread invasive species damaging economically important cultivated solanaceous crop plants, including tomatoes and potatoes. Little ... [more ▼]

The tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), is a widespread invasive species damaging economically important cultivated solanaceous crop plants, including tomatoes and potatoes. Little is known about the ability of this microlepidoptera to encounter and develop on alternative wild and agricultural plant species. These plants could provide refuges and have to be identified for more efficient integrated management strategies. In the present study, we assessed the ability of T. absoluta to develop on wild (Solanum nigrum, Atropa belladonna, Datura stramonium) and cultivated (Solanum tuberosum) solanaceous plant species under laboratory conditions. Fitness tests were performed in Petri dishes by isolating single individuals with excised leaf from one of the host plants. We found that Solanum species allowed higher larval survivability and shorter development time (from egg to adult emergency) compared to the other plants. Two choice behavioral assays performed in flying tunnels (S. tuberosum versus another plant) revealed that adult distribution and female oviposition did not differ between Solanum species, which were preferred to the other tested plants. These results appeared to be consistent with survival rates and development times. Because larval survivability depends on the female’s oviposition choice, the hypothesis that host plant choice is influenced by plant volatile organic compounds has to be tested. It can be concluded that Solanum species remain the more suitable hosts for T. absoluta development among the tested plants. Other plant species could be opportunistically colonized with little incidence but care should be taken in these results as genetic variability in insects and plants, as well as plant physiological state, might have an impact on the pest survivabilty. [less ▲]

Detailed reference viewed: 83 (21 ULg)
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See detailMarty and the 4th Logical Investigation: What is the disagreement really about?
Seron, Denis ULg

Conference (2014, December 13)

Detailed reference viewed: 46 (1 ULg)
Peer Reviewed
See detailBelowground Chemical Ecology: The Case of Wireworms
Barsics, Fanny ULg; Delory, Benjamin ULg; Delaplace, Pierre ULg et al

Conference (2014, December 13)

Detailed reference viewed: 10 (4 ULg)
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See detailDetection of rRNA synthesis sites within reptilian nucleoli
Bartholomé, Odile ULg; Thiry, Marc ULg; Franck, Claire

Poster (2014, December 13)

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See detailLiquidity patterns on the US corporate bond market
Heck, Stéphanie ULg; Margaritis, Dimitri; Muller, Aline ULg

Conference (2014, December 13)

Liquidity commonality exists and empirical evidence (e.g. Lin et al., 2011) indicates that exposure to this common liquidity factor is priced in the cross-section of corporate bonds. The existence of ... [more ▼]

Liquidity commonality exists and empirical evidence (e.g. Lin et al., 2011) indicates that exposure to this common liquidity factor is priced in the cross-section of corporate bonds. The existence of commonality implies that part of a bond’s illiquidity is left as idiosyncratic. In this paper, we study how illiquidity components explain the cross-section of bond yields and how this relationship varies over time and across bond categories. We use a factor decomposition to break down total illiquidity into a common and an idiosyncratic component and analyze how yields relate differentially to each of these two components. We find that a bond’s idiosyncratic illiquidity is important, which might reflect informational asymmetries compounded by the lack of diversification in the institutional investors’ portfolios. Moreover, the relation between illiquidity and yield spreads appears to be negative during the recent crisis period. [less ▲]

Detailed reference viewed: 8 (0 ULg)
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See detailNew technologies in conservation: monitoring African wildlife with UAS
Linchant, Julie ULg; Semeki, Jean; Lejeune, Philippe ULg et al

Conference (2014, December 13)

In the vast protected areas of Africa, traditional wildlife surveys performed by plane or foot are logistically difficult to implement due to the lack of means and appropriate materials. Moreover, the ... [more ▼]

In the vast protected areas of Africa, traditional wildlife surveys performed by plane or foot are logistically difficult to implement due to the lack of means and appropriate materials. Moreover, the possibilities of encountering poachers in the field pose a serious risk to the monitoring teams. Over the last decade, civilian UAS (Unmanned Aerial Systems) boomed in natural resource monitoring. One of the biggest challenges of the UAS is to replace traditional wildlife censuses for the application of wildlife conservation. Parameters have to be approached in a different way than before. We performed test flights in the open savannah of the Garamba National Park during the wet season using the Falcon Unmanned UAS. Both photos (Sony Nex7, 24Mp) and videos, including thermal infrared videos (Tamarisk 640x480), have been used. Flight altitude ranged from 50 to 200m and pictures showed that animals can be effectively detected at 100m. We spotted elephants, hippopotamus and buffaloes as well as other smaller species such as hartebeests, kobs and warthogs. Thermal videos gave medium quality results during the day due to the heat but performed well during the night. The limited range and endurance of the UAS suggest a rethink of the usual census protocols. We therefore tested new flight plans in a rosette shape to take advantage of the higher points in the park, with transects having the length of the maximal range. Twelve transects of 10km can be covered in half a day with pictures covering a 15.6km² area. Human activities could also be detected. Pictures showed areas burned by poachers and the thermal infrared camera allows the detection of fires from a high altitude. Future developments need to be investigated such as automatic detection to review the huge amount of data collected and statistical methods must be adapted to those challenging situations. [less ▲]

Detailed reference viewed: 52 (7 ULg)
See detailPolyplex based on polycarbonate polymers for an efficient delivery of HDAC5 and HDAC7 siRNA
Frère, Antoine ULg; Evrard, Brigitte ULg; Mespouille, Laetitia et al

Conference (2014, December 12)

Detailed reference viewed: 5 (0 ULg)
See detailL’antithèse de la psychopathologie : à propos d’un inexistant
Englebert, Jérôme ULg

Scientific conference (2014, December 12)

Detailed reference viewed: 18 (2 ULg)
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Peer Reviewed
See detailImpact of goldfish on terrestrial and aquatic microhabitat use in the palmate newt
Darnet, Elodie; Winandy, Laurane ULg; Denoël, Mathieu ULg

Poster (2014, December 12)

Detailed reference viewed: 44 (21 ULg)
Peer Reviewed
See detailSpatial variation in the concentrations of mercury and persistent organic pollutants in free-ranging bottlenose dolphins (Tursiops truncatus) from South Florida.
Damseaux, France; Kiszka, Jeremy; Heithaus et al

Poster (2014, December 12)

The bottlenose dolphin (Tursiops truncatus) is an abundant apex predator found in nearshore waters of South Florida, especially in the Lower Florida Keys (Key West) and the coastal waters of Everglades ... [more ▼]

The bottlenose dolphin (Tursiops truncatus) is an abundant apex predator found in nearshore waters of South Florida, especially in the Lower Florida Keys (Key West) and the coastal waters of Everglades National Park (ENP). The objective of this study was to assess variation in contamination levels of total mercury (T-Hg) and persistent organic pollutants (NDL-PCBs, PBDEs, DDT, HCH, HCB, PCDD/Fs and DL-PCBs) in bottlenose dolphins found offshore of the densely populated Key West (n = 27) and from undeveloped ENP (n = 20). [less ▲]

Detailed reference viewed: 32 (2 ULg)
See detailFunambulisme, prudence et ruse. Analyse du contexte de travail des directeurs de prison en Belgique
Dubois, Christophe ULg

Scientific conference (2014, December 12)

Cette contribution à l’analyse sociologique du travail des directeurs de prison éclaire tout d’abord le fondement de ce métier : la gestion de la détention. Présentée comme "individualisée ... [more ▼]

Cette contribution à l’analyse sociologique du travail des directeurs de prison éclaire tout d’abord le fondement de ce métier : la gestion de la détention. Présentée comme "individualisée/individualisante" dans les discours politique, la gestion de la détention s'exerce toutefois dans des contextes de travail bureaucratisés (que l'on pense à la gestion du personnel, à la gestion logistique, à la gestion comptable ou à la gestion stratégique), composés de diverses scènes d’interaction (organisationnelle, politique, associative, administrative, judiciaire, interministérielle) et marqués par les « référentiels » (Muller, 2000) de judiciarisation et de managérialisation du secteur public. L’étude du travail des directeurs de prison met ensuite en lumière trois mécanismes de régulation des établissements pénitentiaires : le pouvoir des [chefs] surveillants au centre d’une « régulation autonome » (Reynaud, 1988) ; la multi-dépendance inter-organisationnelle des prisons éprouvée quotidiennement par les directeurs au centre d’une « régulation croisée » (Crozier et Thoenig, 1975) ; l’articulation ponctuelle et « prudente » (Champy, 2012), par les directeurs, des contraintes et des opportunités inhérentes aux différentes scènes sur lesquelles ils interagissent. L'analyse de certaines situations concrètes révèle enfin que le travail des directeurs n’est pas seulement technique (sur les plans juridiques et administratifs) mais aussi politique: il requiert une hiérarchisation des valeurs ou des finalités poursuivies dans leur activité. [less ▲]

Detailed reference viewed: 35 (0 ULg)
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See detailRapid morphological change of barbels (Cyprinidae) after the dry-up of Sahara
Brahimi, Amina; Tarai, Nacer; Libois, Roland ULg

Poster (2014, December 12)

Detailed reference viewed: 23 (2 ULg)
Peer Reviewed
See detailAnalphabétisme secondaire, raison cynique et la culture pour tous.
Hamers, Jérémy ULg

Conference (2014, December 12)

Detailed reference viewed: 24 (2 ULg)