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See detailA Taxonomy of Distinctive Explanatory Business Failure Patterns amongst Small Firms : A Qualitative Approach
Crutzen, Nathalie ULiege; Van Caillie, Didier ULiege

in Cahier de Recherche du CEPE (2010, September)

Whereas it is obvious that the failure process can vary from one firm to another (Argenti, 1976; D'Aveni, 1989; Laitinen, 1991), to date, few researchers have worked on the detection of several ... [more ▼]

Whereas it is obvious that the failure process can vary from one firm to another (Argenti, 1976; D'Aveni, 1989; Laitinen, 1991), to date, few researchers have worked on the detection of several (explanatory or subsequent) failure patterns. In addition, none of the reviewed research really focuses on small firms while their failure is important and particular (Haswell and Holmes, 1989). Considering these observation and on the basis of an abductive and qualitative analysis (Thiétart, 2003), this paper identifies, among a sample of 208 small distressed firms, a taxonomy of five explanatory business failure patterns, i.e. five homogenous groups of small firms on the basis of the reasons for their failure. As the detection of the fundamental explanatory failure factors is the basis of failure prevention (Argenti, 1976), the identification of these patterns is of crucial importance for a better understanding and for a better prevention of this phenomenon amongst small businesses. [less ▲]

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See detailRelationship between dog's lifestyle and obesity
Bevilacqua, F; Ricci, Rebecca; Binato, S et al

in Liesegang, Annette; Wanner, Marcel (Eds.) Proceedings of the 14th Congress of the ESVCN (2010, September)

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See detailEffect of an energy restricted diet in weight loss and haptoglobin concentration in Beagle dogs
Ricci, Rebecca; Jeusette, Isabelle; Godeau, Jean-Marie ULiege et al

in WALTHAM (Ed.) The WALTHAM International Nutritional Sciences Symposium " Pet Nutrition - Art or science ? " (2010, September)

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See detailA new method to enumerate low level of Listeria monocyogenes and Salmonella spp. in meat products
Delhalle, L.; Adolphe, Y; Jasick, A. et al

Poster (2010, September)

Micro-organisms counting techniques are a subject of major concern in the field of food hygiene. The European Community Regulation No 2073/2005 defined a quantitative limit for 100 cfu.g-1 which was is ... [more ▼]

Micro-organisms counting techniques are a subject of major concern in the field of food hygiene. The European Community Regulation No 2073/2005 defined a quantitative limit for 100 cfu.g-1 which was is applicable for certain types of food during their shelf life. However an adequate counting method for low contaminating levels is still lacking. The EN ISO 11290-2 European and International Standard method for enumeration of Listeria monocytogenes is characterized by a limit of enumeration of 10-100 cfu.g-1, and a poor accuracy. Recently a new method has been developed to enumerate L. monocytogenes at low contamination levels in several food matrices using a membrane filtration method (Baudouin et al., 2009). This method uses a combined enzyme/surfactant treatment to solubilize food components which increases handling period. The aim of the present work was to develop a new method to enumerate L. monocytogenes and Salmonella spp. at low concentration on meat products. This method is based on membrane filtration method without using treatment to solubilize food components. White pudding has been used as “experimental matrix” and artificially contaminated on surface with 4-12 cfu.g-1 of L. monocytogenes or Salmonella spp. For enumeration, 25 g of samples were placed into a plastic bag and homogenised in water peptone buffer (dilution 1/10) for 30 sec using a Pulsifier. Food suspension was filtered on a single use membrane of 47 mm diameter and 0.45 µm pore size. The filters were laid on specific plated media. To compare with a control, 25 g of samples were placed in classic Stomacher bags with a mesh screen liner (280 µm pore size) and homogenised using a Mix 2 Stomacher apparatus with the same dilution as above. A volume of 1 ml of filtered food suspension was laid on specific plated media according to EN ISO 11290-2 standard. Enumeration results obtained with the two methods are statically similar but the new one is easier, cheaper to carry out, and more sensitive. Moreover this methodology is faster than methods previously described and non destructive: food components solubilisation step is no more necessary. Preliminary tests were carried out using minced meat and, due to meat texture, problems with clog membrane occurred, therefore this method should be improved. This new method is useful for simulating the contamination level commonly found in food industries. [less ▲]

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See detailComparative toxicities of a wild Plant essential oil and blends of its major constituents on mortality and fecundity of spider mites (Acari: Tetranychidae)
Attia, Sabrina; Grissa, Kaouthar Lebdi; Ghrabi, Zeineb et al

in Lochynski, Stanislaw; Wawrzenczyk, Czeslaw (Eds.) 41th International Symposium on Essential Oils (ISEI 2010) (2010, September)

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See detailConsensus on Nonlinear Spaces
Sepulchre, Rodolphe ULiege

in Proceedings of the 8th IFAC Symposium on Nonlinear Control Systems (2010, September)

Consensus problems have attracted significant attention in the control community over the last decade. They act as a rich source of new mathematical problems pertaining to the growing field of cooperative ... [more ▼]

Consensus problems have attracted significant attention in the control community over the last decade. They act as a rich source of new mathematical problems pertaining to the growing field of cooperative and distributed control. This paper is an introduction to consensus problems whose underlying state-space is not a linear space, but instead a highly symmetric nonlinear space such as the circle and other relevant generalizations. A geometric approach is shown to highlight the connection between several fundamental models of consensus, synchronization, and coordination, to raise significant global convergence issues not present in linear models, and to be relevant for a number of engineering applications, including the design of planar or spatial coordinated motions. [less ▲]

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See detailConclusions générales sur la journée d'étude consacrée au contrôle juridictionnel de la passation des marchés publics
Durviaux, Ann-Lawrence ULiege

in Entreprise et le Droit (L') = Tijdschrift voor Aannemingsrecht (2010, September)

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See detailANalyse d'une dynamique de transition vers l'habitat durable : le projet SUN et la rénovation énergétique collective dans le quartier Saint-Léonard, sous la loupe de la sociologie de la traduction
Dannevoye, Bastien ULiege

Master's dissertation (2010)

Le mémoire étudie la manière dont se déroule l'intéressement des habitants du quartier Saint-Léonard (Liège) au volet "Isol'action" du projet Interreg "SUN", consistant en la commande groupée d'audits ... [more ▼]

Le mémoire étudie la manière dont se déroule l'intéressement des habitants du quartier Saint-Léonard (Liège) au volet "Isol'action" du projet Interreg "SUN", consistant en la commande groupée d'audits énergétiques et de travaux d'isolation d'habitations privées, afin de doper la transition énergétique du quartier Saint-Léonard. Le travail utilise la méthode de la théorie de l'acteur-réseau (Callon, Latour, Law, etc.). [less ▲]

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See detailModélisation spatiale des flux organiques et minéraux assurant la productivité durable des agroécosystèmes culture-élevage dans le sahel nigérien
Djaby, Bakary ULiege

Doctoral thesis (2010)

Agriculture (including crop and livestock) employs more than 80% of the work force in semi-arid regions of West Africa and provide most of the food requirements and incomes. In most developing countries ... [more ▼]

Agriculture (including crop and livestock) employs more than 80% of the work force in semi-arid regions of West Africa and provide most of the food requirements and incomes. In most developing countries, soil nutrient depletion is a major issue for soil degradation. Crop-livestock integration is an effective means by which nutrients can be rapidly recycled within and between farms. In West Niger, where mixed farming systems dominate, livestock's role in recycling organic matter and mineral nutrients (nitrogen, phosphorus and potassium) must be better assessed to increase production and ensure sustainable food security. Nutrient flows through forage uptake and excretion deposit by grazing livestock must be assessed at a wider scale than the farm. Organic matter and nutrients balance and fluxes were used as measurable criteria for sustainable agriculture production. This research focuses on these indicators assessments at farm, land use unit and village level. This study was conducted in three agropastoral territories in the Fakara region of western Niger (Dantiandou District) that lies between the Niger River to the west and the Dallol Boboye (Bosso), a fossil valley tributary of the Niger, to the east. The area has homogeneous geological characteristics and rainfall conditions, but land use history, human and animal population density and cropping intensity vary within the region. 461 farms were concerned. In the mixed crop-livestock systems, the duality of the spatial organization, crop management at field level and livestock management with communal rangeland is a major issue for nutrients balance and fertility management modeling. Two models were then used to assess flows and nutrients balances. The NUTMON Toolbox developed by Dutch researchers is used to assess agricultural fluxes at farm parcels level. Spatial modeling was done with NUTPAST, a GIS tool developed in this thesis framework to assess livestock intake and excretion fluxes at land use scale. This tool takes into account the spatiotemporal patterns of vegetation as well as livestock seasonal variation. Quantile regression analysis and multinomial polytomous logistic regression modeling was used to assess soil fertility depletion risk indicator based on farm agriculture viability variables and nutrients partial balance. The results obtained show a less negative partial nutrients balance than in previous studies when the livestock spatio-temporal effect is taken into account. The results bring functional improvement and analytical evaluation of flows and partial nutrients balance calculation, while taking into account the functions of livestock in the organic matter recycling. The overall partial balance of N, P, K are 0.3 ± 0.6, 1.2 ± 0.2, 0.9 ± 0.5 kg/ha. The review highlighted a wide disparity between farms which show a strongly positive balance among livestock owners and negative balance among Fakara small farmers with few land and livestock endowments. Owning animals allows some households to maintain soil fertility by capturing and mobilizing soil nutrients. Risk indicators, based on land pressure indicator at 3x3 km geographic grid level, livestock endowments and land per capita reveal that despite a slow intensification, the trend for a risk of relative depletion of soil fertility is very high. This trend may compromise the sahelian agriculture sustainability. The problems of unequal benefit from communal resources remain a big issue of the sahelian agriculture. With increasing pressure on land, it is necessary to look beyond the traditional free range communal grazing systems to more intensive alternatives and stronger land tenure policies. [less ▲]

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See detailKashin-Beck Disease: evaluation of mineral intake in young Tibetan children from endemic areas
Dermience, Michael ULiege

Master's dissertation (2010)

Kashin-Beck disease is an endemic and chronic osteochondropathy. This disease principally occurs in the Tibet Autonomous Region and in several provinces of the People’s Republic of China. Although many ... [more ▼]

Kashin-Beck disease is an endemic and chronic osteochondropathy. This disease principally occurs in the Tibet Autonomous Region and in several provinces of the People’s Republic of China. Although many studies have already been conducted and many others are still underway, its ethiology remains unknown. A multifactorial hypothesis has been proposed: selenium deficiency, high concentration of organic matters in drinking water (fulvic acids) and mycotoxin poisoning by fungi infecting cereals. This original study aimed to measure the mineral contents of the food most often consumed in severe endemic regions and then to evaluate the daily intake of minerals in young Tibetan children from endemic areas. The mineral elements were selected in relation to their implications in bone metabolism. A sampling campaign split up into two time periods (winter and spring) was carried out. Ten families from two distinct regions were selected based on three criteria: they live in endemic areas; they include a 3 to 5 year-old child; this child has a KBD brother or sister. At the same time, a nutritional survey was made by the means of a prospective questionnaire in order to list the 24h food intake of the 3 to 5 year-old child. This survey highlighted the extremely monotonous cereal-based Tibetan diet. An analytical method for the minerals was developed as follows: mineralization of samples performed by microwave-assisted wet process; mineralized solutions measured by several atomic absorption or emission spectrometric methods and molecular absorption spectrometric methods. The analytical method was validated by mean of certified reference materials. Mean food contents were calculated and compared to food composition reference tables. High iron contents and selenium deficiencies were highlighted in several foods. Daily intakes were estimated combining mineral measurements and nutritional survey results. These were compared to dietary reference intakes from reference tables. This estimation reveals some crucial points: we confirm a marked deficiency in calcium; Ca/P ratios are always low; iron and copper intakes are excessive; zinc is the most probably deficient; while selenium could be deficient; manganese intakes often exceed toxicity thresholds. Nevertheless, this study encounters some limits. The bioavailability of minerals is a critical point that deserves further investigations. Moreover, a larger study over a longer term covering both endemic and non-endemic regions is required for definite conclusions to be reached. [less ▲]

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See detailL'Alimentation des Populations locales de Madagascar productrices de Vers à Soie
Barsics, Fanny ULiege

Master's dissertation (2010)

On the Malagasy High-Lands, the tapia forests (Uapaca bojeri Baillon Ŕ Euphorbiaceae) shelter wild silk moths of the genus Borocera (Lepidoptera : Lasiocampidae), the landibe. Besides the silk it produces ... [more ▼]

On the Malagasy High-Lands, the tapia forests (Uapaca bojeri Baillon Ŕ Euphorbiaceae) shelter wild silk moths of the genus Borocera (Lepidoptera : Lasiocampidae), the landibe. Besides the silk it produces, the landibe also provides food as local populations often eat the chrysalis. The resource is depressed, because of the numerous human and environmental pressures under which it is, as the tapia forests recede. The present research takes part in the Gevabo project (Management and development of the endemic silk moth Borocera cajani). Resulting from a French-speaking Belgian university cooperation, this project is aimed at evaluating the opportunities that could lead to the increase of the landibe populations. At the crossroads of multiple disciplines such as entomology, environment conservation, rural economy and socio-anthropology, solving strategies for a better management of the resource and its ecosystem are considered. On the one hand, an inventory protocol involving a night light trap was established in purpose to determine the degree of impact of the local forests management on the landibe populations. On the other hand, wild edible products from the tapia forests were studied by interviewing local villagers. Eaten insects, spiders, mushrooms and plants (fruit and other anatomic parts) were described according to the following characteristics : harvest, consumption habits, cooking modes, commercial practices and state of the resource in the surroundings. The establishment of amino acids and fatty acids profiles was undertaken on several resources in purpose to define their contribution in the local usual food diet. During the inventory sessions, the landibe did not appear in spite of our presence on the field at the right time. Our investigations allowed the discovery of many wild edible resources, or ethnospecies : thirteen insects (five of which belong to the Lepidoptera order), one spider, twenty-five mushrooms and eleven plants. The alimentary profile analysis of the spider, two caterpillars, as well as four dried mushrooms allowed comparing them to rice, basic crop of the research area. Many of those resources are commercialised. Thus, we can provide clear guidelines for further investigations to lead within the project, based on the information we gathered concerning wild edible resources. [less ▲]

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See detailBehaviour of EMP under shear loadings
Phung Ngoc, Dung ULiege; Degée, Hervé ULiege; Plumier, André ULiege

in Behaviour of EMP under shear loadings- SDSS 2010 (2010)

Experimental and theoretical study of expanded metal panels (EMP) has shown that they are useful for seismically retrofitting reinforced concrete moment resisting frames (RC-MRF). Although this product ... [more ▼]

Experimental and theoretical study of expanded metal panels (EMP) has shown that they are useful for seismically retrofitting reinforced concrete moment resisting frames (RC-MRF). Although this product has merit of strength and ductility, it is at present only used for non-structural applications. There is no guidance existing to help the engineers determine the mechanical properties or to indicate in which field of the structures this product can be used. With the aims at providing quantitative data for these purposes and at introducing a simplified model of EMP working in shear, description and comparison of the results of 22 monotonic and cyclic experiments of 4 profiles of EMP in small and large scale is presented. Numerical approach with FINELG, a nonlinear finite element code developed at University of Liege, is used to calibrate and simulate the tests. A good correlation between tests and numerical simulations is observed. [less ▲]

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See detailTaming the “Publication Machine”: Generating Unity, Engaging the Trading Zones
Thoreau, François ULiege; Neicu, Maria

in Spontaneous Generations: A Journal for the History and Philosophy of Science (2010), 4(1), 163-172

In this paper, we explore the par ticular issue of a biomedical research team engaging itself in different “trading zones” (Galison 1997). We do so by following the specific process of setting up a new ... [more ▼]

In this paper, we explore the par ticular issue of a biomedical research team engaging itself in different “trading zones” (Galison 1997). We do so by following the specific process of setting up a new microscope. We star t by briefly introducing our general understanding of the concept of “trading zone.” Then we focus on the empirical material we collected, star ting from the microscope as the researchers we followed were setting it up. Our analysis is twofold: we first describe the acts we have been witnessing, then contrast them with the surrounding discourses and provide them with a rationale. We argue that the team created a sense of unity among its individual members and how this unity, though precarious, was needed and desired in order to fur ther engage in a trading zone. [less ▲]

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See detailCommunautés de Pratique : susciter et maintenir l'interactivité
Snoeck, Céline ULiege

Conference (2010, August 26)

Cet article traite des CoP, du choix des outils TIC et des fonctionnalités qui répondent aux besoins des membres et de l’animation de communautés de pratique. « Les CoP (Communautés de Pratiques) sont des ... [more ▼]

Cet article traite des CoP, du choix des outils TIC et des fonctionnalités qui répondent aux besoins des membres et de l’animation de communautés de pratique. « Les CoP (Communautés de Pratiques) sont des groupes de personnes qui partagent une préoccupation ou une passion pour quelque chose et qui apprennent à le faire mieux en interagissant régulièrement. » (Wenger, 2006). [less ▲]

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See detailQualité de vie et droit des seniors
Squelard, Gilles ULiege

Conference given outside the academic context (2010)

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See detailImpact of ageing and food additives on the physico-chemical properties of partially hydrolyzed and pregelatinized rice flour
Mertens, Cécile ULiege; Blecker, Christophe ULiege

Poster (2010, August 25)

Conservation of the quality of a food product is an essential preoccupation for industrials. Indeed, food acceptability by consummers depends of this quality. However, the latter decreases with time of ... [more ▼]

Conservation of the quality of a food product is an essential preoccupation for industrials. Indeed, food acceptability by consummers depends of this quality. However, the latter decreases with time of storage, due to complex alteration reactions. This study presents a first approach of alteration reactions in a particular range of products: drum-dried pregelatinized cereal products. While this type of product is widely used as thickeners or in infant foods, no study has ever been made on the subject. The cereal studied here is one of the most consumed by mankind: rice. We also investigated the impact of food additives (E170 & E340ii) on the ageing of such a product, because they are often used empirically in industry. [less ▲]

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See detailSeismic retrofitting and upgrading reinforced concrete moment resisting frames by using expanded metal shear panels
Phung Ngoc, Dung ULiege; Degée, Hervé ULiege; Plumier, André ULiege

in Seismic retrofitting and upgrading reinforced concrete moment resisting frames by using expanded metal shear panels (2010)

Expanded Metal is a second product made from metal sheet by first cuttings, cold-drawing, and finally by being flattened. A research is under way at University of Liege with the aims at determining the ... [more ▼]

Expanded Metal is a second product made from metal sheet by first cuttings, cold-drawing, and finally by being flattened. A research is under way at University of Liege with the aims at determining the mechanical properties of this type of material under seismic excitations. In view of their application to building seismic retrofitting and upgrading, three approaches: analytical models, numerical simulations and experimental investigations, have been used to characterize the mechanic behavior of expanded metal sheets which are monotonically and cyclically loaded in shear. Nonlinear numerical simulations and experimental tests are used to determine the hysteretic behavior of expanded metal shear panels (EMSP), and an analytical model is then proposed, with the aims of using that to study the influence of such EMSP when they are used to retrofit and upgrade reinforced concrete moment resisting frames (RC-MRF). Many RC-MRF are then designed in two cases: (1) in accordance with only Eurocode 2 and (2) in accordance with both Eurocode 2 and Eurocode 8. Capacities of such designed structures are evaluated by using nonlinear static analysis (Pushover) and nonlinear time history analysis under different types of soils and ground motions. The efficiency of using EMSP is evaluated in terms of strength, stiffness and energy dissipation. Additionally, with the presence of EMSP, some unfavorable behavior of RC-MRF under seismic action such as soft story mechanism can be prevented. [less ▲]

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