Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailContribution to the derivation of robustness requirements for steel and composite structures
Jaspart, Jean-Pierre ULg; Demonceau, Jean-François ULg

in Proceedings of Advances in steel structures Conference (2007, December)

Detailed reference viewed: 74 (13 ULg)
Full Text
See detailContribution to the description of the nitrogen cycle in Lake Kivu
Roland, Fleur ULg; Borges, Alberto ULg; Crowe, Sean et al

Poster (2013, November 12)

Detailed reference viewed: 41 (0 ULg)
Full Text
Peer Reviewed
See detailContribution to the design of braced frames with semi-rigid connections
Maquoi, René ULg; Jaspart, Jean-Pierre ULg

in Proceedings of the Fourth International colloquium on stability of metal structures, North America session (1989)

Detailed reference viewed: 17 (2 ULg)
Full Text
Peer Reviewed
See detailContribution to the design of sway composite frames
Maquoi, René ULg; Jaspart, Jean-Pierre ULg; Demonceau, Jean-François ULg

in Leon, Roberto; Lange, Jörg (Eds.) Composite Construction in Steel and Concrete V (2004, July 18)

This paper presents numerical and analytical studies carried out at Liège University, as part of a European research project, with the objective to investigate the in-plane behaviour of composite sway ... [more ▼]

This paper presents numerical and analytical studies carried out at Liège University, as part of a European research project, with the objective to investigate the in-plane behaviour of composite sway frames under static loading. [less ▲]

Detailed reference viewed: 70 (11 ULg)
Peer Reviewed
See detailContribution to the development of a biological control method against crown rot banana disease
Lassois, Ludivine ULg; de Lapeyre de Bellaire, Luc; Jijakli, Haissam ULg et al

Poster (2004)

Detailed reference viewed: 26 (17 ULg)
Full Text
Peer Reviewed
See detailContribution to the development of an erosivity index adapted to the prediction of erosion in Belgium
Sinzot, Anne; Bolline, Arthur; Laurant, Adrien et al

in Earth Surface Processes & Landforms (1989), 14

Detailed reference viewed: 21 (8 ULg)
Full Text
See detailContribution to the epidemiology of bovine brucellosis in Ivory Coast
Sanogo, Moussa ULg

Doctoral thesis (2014)

Bovine brucellosis is an endemic infectious disease which can negatively impact on cattle productivity and welfare as well as on human health. In many developing countries such as Ivory Coast, there is a ... [more ▼]

Bovine brucellosis is an endemic infectious disease which can negatively impact on cattle productivity and welfare as well as on human health. In many developing countries such as Ivory Coast, there is a need for knowledge on the distribution and the frequency of the disease (or evidence of its presence) within the animal population and the possible factors associated with the disease. Information is also needed on species and biovars of Brucella at national and regional scales, on the performance of commonly used diagnostic tests for accurate estimation of the true disease prevalence, and on determination of risk factors associated with the disease. These informations are of key importance to set up and implement appropriate and efficient prevention and control measures against brucellosis. For these reasons, the research presented in this thesis aimed to contribute to a better understanding of the epidemiology of bovine brucellosis in Ivory Coast. The thesis is structured into three main parts. The introduction part includes three chapters. The first chapter presents an overview of the literature on the pathogen causing brucellosis, their characteristics and distribution. The impact and the existing strategies for preventing and controlling brucellosis are discussed with a particular reference to the situation of bovine brucellosis in Ivory Coast. The presence and the importance of the disease were confirmed in the country but the disease is still uncontrolled. In the second chapter (Chapter 2), an insight on statistical, epidemiological principles and concepts applied to achieve the different objectives (Chapter 3) is given, including a discussion on available approaches to estimate diagnostic test characteristics and the true prevalence of a disease. The second part of the thesis includes research on different aspects of the epidemiology of bovine brucellosis in Ivory Coast and West Africa (Chapter 4, 5, 6 and 7). Chapter 4 specifically provides a state-of–the-art knowledge on species and biovars of Brucella reported in cattle from Ivory Coast and all other countries of West Africa, through a review of available literature. From the synthesized literature, Brucella abortus was demonstrated to be the most prevalent species in cattle in West Africa, in line with the known host preference for Brucellae. So far, biovars 3 appeared to be commonly the most isolated in West Africa and was also recently identified in Ivory Coast. However, the presence of B. melitensis and/or B. suis was not reported yet in cattle in this part of Africa. Results on prevailing strains of Brucella in cattle were related with commonly used serological diagnostic tools. Thus, chapter 5 was dedicated to verify their appropriateness and to assess the performance of two serological tests, Rose Bengal Test (RBT) and indirect Enzyme-linked Immunosorbent assay (iELISA). Using a Bayesian approach, the correlation-adjusted sensitivity of iELISA was estimated at 96.1 % (Credibility Interval (CrI): 92.7-99.8) whereas that of RBT was 54.9 % (CrI: 23.5-95.1). High correlation-adjusted specificities were found for both tests, 95.0 % (CrI: 91.1-99.6) for iELISA and 97.7 % (CrI: 95.3-99.4) for RBT, respectively. The true prevalence of brucellosis was also estimated using the 1228 tested serum samples to be 4.6 with a 95% credibility interval ranging from 0.6 to 9.5% (Chapter 5 and 6). These results also revealed a good performance for the iELISA, which might consequently be a valuable screening assay under the epidemiological conditions prevailing in Ivory Coast. In Chapter 7, risk factors associated with bovine brucellosis seropositivity were investigated using serological results obtained from 907 serum samples collected from unvaccinated cattle of at least 6 months of age in the savannah-forest region of Ivory Coast. Serum samples were tested using the Rose Bengal test (RBT) and indirect enzyme linked immunosorbent assay (iELISA). The logistic regression analysis indicated that brucellosis seropositivity was associated with age and herd size. Cattle above 5 years of age were found to be more likely seropositive (Odd Ratio (OR) =2.8; 95% Confidence Interval (CI): 1.3, 6.4) compared to cattle under 3 years of age. Similarly, the odds of brucellosis seropositivity for herds with more than 100 cattle was 3.3 (95% CI: 1.2, 8.9) times higher compared to those with less than 50 cattle. The third part presents a general discussion on the overall contribution of the current research (Chapter 8), by highlighting the main results and pointing out their significance. The need for more investigations on the epidemiology of brucellosis, in Ivory Coast and at West African scale, is highlighted. It is neccessary to provide additional knowledge on prevailing field strains of Brucella, on the distribution of the disease and on associated risk factors to implement preventive and control measures. Finally, for more cost-effectiveness and efficiency, the need to strengthen the capabilities of the veterinary services and national laboratories and to consider the control of brucellosis and other zoonotic diseases through a regional, integrated and collaborative perspective is also highlighted. [less ▲]

Detailed reference viewed: 61 (9 ULg)
Full Text
See detailContribution to the epidemiology of bovine tuberculosis in northern Ecuador
Proaño Perez, Freddy ULg

Doctoral thesis (2011)

See attached document, page vii

Detailed reference viewed: 65 (3 ULg)
See detailContribution to the evaluation of soil quality around the Naivasha lake (Kenya).
Borgers, nathalie; Colinet, Gilles ULg; Gouder de Beauregard, Anne-Christine et al

Poster (2005, September)

Detailed reference viewed: 13 (2 ULg)
Full Text
See detailA contribution to the history of the embryonic development of the Teleosteans
Van Beneden, Édouard ULg

in Quarterly Journal of Microscopical Science (The) (1878), 2(18), 41-57

Detailed reference viewed: 9 (1 ULg)
Full Text
Peer Reviewed
See detailContribution to the identification of α-, β- and ε-copper phthalocyanine blue pigments in modern artists' paints by X-ray powder diffraction, attenuated total reflectance micro-fourier transform infrared spectroscopy and micro-Raman spectroscopy
Defeyt, Catherine ULg; Vandenabeele, P.; Gilbert, Bernard ULg et al

in Journal of Raman Spectroscopy (2012), 43

Since the end of the 20th century, the α-, β- and ε-copper phthalocyanine (CuPc) blue pigments are widely used in modern artists' paints. The identification of the CuPc crystalline structure can provide ... [more ▼]

Since the end of the 20th century, the α-, β- and ε-copper phthalocyanine (CuPc) blue pigments are widely used in modern artists' paints. The identification of the CuPc crystalline structure can provide useful technical and chronological information for the study of works of art. Although when a CuPc blue pigment is identified, its crystalline structure often remains unspecified despite the interest for conservation science. In this study, X-ray powder diffraction, attenuated total reflectance micro-Fourier transform infrared spectroscopy and micro-Raman spectroscopy analyses have been carried out on 15 dry pigment samples of CuPc and acrylic, vinylic, alkyd, arabic gum and oil-based artists' paints. By using the polymorphic markers underlined for dry pigments, the CuPc crystalline structure has been successfully identified for most of the analysed artists' paints. However, according to the analytical technique used and the investigated paint sample, the obtained results largely differ. © 2012 John Wiley & Sons, Ltd. [less ▲]

Detailed reference viewed: 34 (10 ULg)
Full Text
See detailContribution to the Inverse Dynamics of Flexible Manipulators
Guimaraes Bastos Junior, Guaraci ULg

Doctoral thesis (2013)

This thesis studies innovative, stable but non-causal inverse dynamics algorithms for flexible manipulators. Robust direct optimal control methods are proposed. The nonlinear finite element method is used ... [more ▼]

This thesis studies innovative, stable but non-causal inverse dynamics algorithms for flexible manipulators. Robust direct optimal control methods are proposed. The nonlinear finite element method is used to derive the mechanical model of the multibody system and the time discretization is performed using the generalized-alpha method. The sparse gradients of the optimization constraints are computed using a semi-analytical method. The inverse dynamics of both serial and parallel kinematic manipulators with flexible links and joints is successfully studied using the proposed method. Finally, the possible extension of the method for the integrated control/structure optimization of mechatronic systems is investigated. [less ▲]

Detailed reference viewed: 108 (29 ULg)
Full Text
Peer Reviewed
See detailContribution to the knowledge of lichens in northern France
Diederich, Paul; Van Den Broeck, Dries; Ertz, Damien et al

in Bulletin de la Société des Naturalistes Luxembourgeois (2006), 106

Detailed reference viewed: 9 (0 ULg)
Full Text
Peer Reviewed
See detailContribution to the Macrophytic Typology of Belgian Reference Watercourses
Galoux, Daniel; Cherot, Frédéric; Rosillon, Francis ULg et al

in Advances in Botany (2015), Volume 2015, Article ID 651369

The objective of the study is to create a typology of macrophytes for the reference watercourses of the Meuse River catchment ... [more ▼]

The objective of the study is to create a typology of macrophytes for the reference watercourses of the Meuse River catchment basininWalloniaasasteptowardstheimplementationoftheEuropeanWaterFrameworkDirective.The50sitesstudiedarethe objectofaphysicochemicalandenvironmentalcharacterizationfollowedbyafloristicsurvey(phanerogams,mosses,liverworts, andmacroalgae).Sixclustersofwatercourseswiththeircharacteristicspeciesarehighlightedbytwo-wayclusteringandindicator species. The abundance of phanerogams in some watercourses of the Arden region is not only linked to light intensity but also dependsonthedegreeofslopeandthenatureofthegeologicalsubstrate [less ▲]

Detailed reference viewed: 26 (3 ULg)
Full Text
See detailContribution to the management of inherited disorders in Belgian Blue Cattle Breed
Sartelet, Arnaud ULg

Conference (2013, April 23)

Detailed reference viewed: 50 (12 ULg)
Full Text
Peer Reviewed
See detailContribution to the modeling of shellfish zooplankton production in wastewater stabilization ponds (WSP)
Liady, Mouhamadou Nourou Dine ULg; Fiogbé, Emile-Didier; Vasel, Jean-Luc ULg

Conference (2011, May 13)

This bibliographical study falls under the context of researching financial autonomy for durable management of South countries’ wastewater ponds (WSP), and growing interest on shellfish zooplanktons that ... [more ▼]

This bibliographical study falls under the context of researching financial autonomy for durable management of South countries’ wastewater ponds (WSP), and growing interest on shellfish zooplanktons that contribute to water treatment and can be recovered in aquaculture and many industrial applications. Our project w ill start by gathering available data aiming at the development of a mathematical model of the contribution of zooplankton in pond ecosystems. This model would include the effect of most driving factors on the growth of shellfish zooplankton in WSP combined with water treatment effi ciency and biomass productivities. After a description of various types of WSP and their corresponding zooplanktons, emphasis is put on the shellfish cladocerans, especially Daphnia. The range of growth rates in various conditions is provided and expressions of growth kinetic, merging the effect of most important factors identified. These expressions of kinetic and the corresponding stoichiometry will serve as a first approach in our model. We hope that this type of research will help in the development of sustainable sanitation systems in developing countries. [less ▲]

Detailed reference viewed: 15 (0 ULg)