Last 7 days     Results 1741-1760 of 9926.   83 84 85 86 87 88 89 90 91 92 93   Impacts of occupant behaviours on residential heating consumption for detached houses in a temperate climate of the northern part of Europede Meester, Tatiana; Marique, Anne-Françoise ; De Herde, André et alin Energy & Buildings (2013), 57The occupants' behaviour has a great influence on the energy demand, management and consumption of a building. This paper investigates the influence of three parameters related to human behaviour through ... [more ▼]The occupants' behaviour has a great influence on the energy demand, management and consumption of a building. This paper investigates the influence of three parameters related to human behaviour through their modes of occupations (based on family size, management of the heating system and management of the heated area) on the housing heating loads of a standard dwelling in Belgium. Seven levels of insulation were tested: no insulation, two intermediate levels corresponding to 3 and 6 cm of insulation, the current standard for new buildings in Belgium, the low energy standard, the very low energy standard and the passive house standard. Multi-zone simulations were performed with a dynamic thermal simulation software. The impact of occupants' lifestyle and the interactions between occupation modes and insulation levels are highlighted. These results prove that the more the building is insulated, the more the lifestyle proportionally influences the heating loads. One important strategy for reducing heating consumption during the whole life cycle of the building is adapting the size of the house and its occupation modes to the evolution of family size. However, insulation is paramount, and increasing the insulation of the house provides generally better results than merely adapting the occupation mode. [less ▲]Detailed reference viewed: 55 (12 ULg) Probing the phase of the elastic $pp$ scattering amplitude with vortex proton beamsIvanov, Igor in AIP Conference Proceedings (2013)We show that colliding vortex proton beams instead of (approximate) plane waves can lead to a direct measurement of how the overall phase of the scattering amplitude changes with the scattering angle. In ... [more ▼]We show that colliding vortex proton beams instead of (approximate) plane waves can lead to a direct measurement of how the overall phase of the scattering amplitude changes with the scattering angle. In elastic $pp$ scattering, this will open a novel way to measure the parameter $\rho(t)$ and probe the real part of the Pomeron. [less ▲]Detailed reference viewed: 9 (1 ULg) Symmetries in multi-Higgs-doublet modelsIvanov, Igor ; Vdovin, Evgenyin AIP Conference Proceedings (2013)We report the recent progress in understanding of symmetries which can be implemented in the scalar sector of electroweak symmetry breaking models with several Higgs doublets. In particular we present the ... [more ▼]We report the recent progress in understanding of symmetries which can be implemented in the scalar sector of electroweak symmetry breaking models with several Higgs doublets. In particular we present the list of finite reparametrization symmetry groups which can appear in the three-Higgs-doublet models. [less ▲]Detailed reference viewed: 13 (1 ULg) Carnet de pédiatrie: hématologie et douleur de l'enfantBattisti, Oreste ; DRESSE, Marie-Françoise Learning material (2013)Detailed reference viewed: 25 (2 ULg) Synthesis of poly(vinyl acetate)-b-poly(vinyl chloride) block copolymers by cobalt-mediated radical polymerization (CMRP)Piette, Yasmine; Debuigne, Antoine ; Bodart, Vinent et alin Polymer Chemistry (2013), 4(5), 1685-1693The synthesis of poly(vinyl acetate)-b-poly(vinyl chloride) (PVAc-b-PVC) block copolymers by Cobalt-Mediated Radical Polymerization (CMRP) is investigated for the first time in this paper. A PVAc–Co(acac ... [more ▼]The synthesis of poly(vinyl acetate)-b-poly(vinyl chloride) (PVAc-b-PVC) block copolymers by Cobalt-Mediated Radical Polymerization (CMRP) is investigated for the first time in this paper. A PVAc–Co(acac)2 macroinitiator is prepared by CMRP using the V-70/Co(acac)2 binary system or a preformed alkylcobalt(III) compound. Then, the block copolymerization occurs in the bulk at 40 °C by the addition of VC. The addition of water to the polymerization medium or the slow generation of alkyl radicals during the whole polymerization is beneficial to the process by consuming part of the excess of deactivator (Co(acac)2) that blocks the polymer chains into the dormant form. Dynamic light scattering (DLS) measurements and AFM analyses evidence that the PVAc-b-PVC forms core–shell micelles in a selective solvent of the PVAc block, i.e. methanol, evidencing the blocky structure of the copolymer. PVAc-b-P(VC-co-VAc) copolymers are also successfully prepared by initiating the radical copolymerization of VC and VAc at 40 °C from a PVAc–Co(acac)2 macroinitiator. [less ▲]Detailed reference viewed: 14 (3 ULg) Echocardiographic integrated backscatter for detecting progression and regression of aortic valve calcifications in rats.Roosens, Bram; Bala, Gezim; Gillis, Kris et alin Cardiovascular Ultrasound (2013), 11(1), 4ABSTRACT: BACKGROUND: Calcification is an independent predictor of mortality in calcific aortic valve disease (CAVD). The aim of this study was to evaluate the use of non-invasive, non-ionizing ... [more ▼]ABSTRACT: BACKGROUND: Calcification is an independent predictor of mortality in calcific aortic valve disease (CAVD). The aim of this study was to evaluate the use of non-invasive, non-ionizing echocardiographic calibrated integrated backscatter (cIB) for monitoring progression and subsequent regression of aortic valvular calcifications in a rat model of reversible renal failure with CAVD, compared to histology. METHODS: 28 male Wistar rats were prospectively followed during 21 weeks. Group 1 (N=14) was fed with a 0.5% adenine diet for 9 weeks to induce renal failure and CAVD. Group 2 (N=14) received a standard diet. At week 9, six animals of each group were killed. The remaining animals of group 1 (N=8) and group 2 (N=8) were kept on a standard diet for an additional 12 weeks. cIB of the aortic valve was calculated at baseline, 9 and 21 weeks, followed by measurement of the calcified area (Ca Area) on histology. RESULTS: At week 9, cIB values and Ca Area of the aortic valve were significantly increased in the adenine-fed rats compared to baseline and controls. After 12 weeks of adenine diet cessation, cIB values and Ca Area of group 1 decreased compared to week 9, while there was no longer a significant difference compared to age-matched controls of group 2. CONCLUSIONS: cIB is a non-invasive tool allowing quantitative monitoring of CAVD progression and regression in a rat model of reversible renal failure, as validated by comparison with histology. This technique might become useful for assessing CAVD during targeted therapy. [less ▲]Detailed reference viewed: 13 (3 ULg) Two-Parameter Kinematic Theory for Shear Behavior of Deep BeamsMihaylov, Boyan ; Bentz, Evan; Collins, Michaelin ACI Structural Journal (2013), 110(3), 447-455This paper presents a kinematic model for deep beams capable of describing the deformed shape of such members in terms of just two primary parameters. The kinematic model is combined with equilibrium ... [more ▼]This paper presents a kinematic model for deep beams capable of describing the deformed shape of such members in terms of just two primary parameters. The kinematic model is combined with equilibrium equations and stress-strain relationships to form a theory to predict the shear strength and deformations patterns of deep beams at shear failure. These deformation patterns include crack widths, maximum deflections, and the complete displacement field for the beam. The kinematic theory predicts the components of shear strength of deep beams and how they vary with a/d ratio. These components indicate a significant size effect for the shear strength of deep beams even for members with transverse reinforcement. The theory has been validated against a large number of experimental results. [less ▲]Detailed reference viewed: 31 (17 ULg) Relationship between plasma progesterone and pregnancy-associated glycoprotein concentrations during early pregnancy in dairy cowsBarbato, O; Merlo, M; Celi, P et alin Veterinary Journal (2013)The relationship between the concentration of plasma progesterone (P4) during embryo attachment or at recognition of pregnancy, and that of pregnancy-associated glycoprotein (PAG) was assessed in dairy ... [more ▼]The relationship between the concentration of plasma progesterone (P4) during embryo attachment or at recognition of pregnancy, and that of pregnancy-associated glycoprotein (PAG) was assessed in dairy cows. The outcome of artificial insemination (AI) was classified as positive (AI+), negative (AIÿ), or late embryonic mortality (EM) by measuring circulating PAG concentrations and by ultrasonography. Based on P4 concentrations at either day 21 or day 15, AI+ and EM cows were classified into ‘low’ (P4 concentrations < mean) and ‘high’ (P4 concentrations > mean) P4 groups. In both experiments, the threshold of P4 concentration between the ‘low’ and ‘high’ groups was approximately 6 ng/mL. PAG concentrations were lower in the ‘low’ group only when P4 concentrations were below the threshold. The study findings suggest that a possible P4 threshold exists below which PAG secretion may be impaired [less ▲]Detailed reference viewed: 7 (2 ULg) Catalytic layer for PEMFC based on carbon xerogelsDeschamps, Fabien ; Traina, Karl; Pirard, Jean-Paul et alin Proceedings of the Fundamentals and Development of Fuel cells 2013 conference (2013)Detailed reference viewed: 1 (1 ULg) Tooling Materials and Solutions for Thixoforming of SteelRassili, Ahmed ; Falzone, Salvatore ; Lecomte-Beckers, Jacqueline in Solid State Phenomena (2013), 192-193The aim of this work is to evaluate the thermal and mechanical loadings applied to the tools during steel thixoforming process in order to determine appropriate tool materials and solutions. This ... [more ▼]The aim of this work is to evaluate the thermal and mechanical loadings applied to the tools during steel thixoforming process in order to determine appropriate tool materials and solutions. This evaluation was realized thanks to experimental trials and to the finite elements simulations. The effect of these loadings on the tool’s failure modes are highlighted and compared to the ones observed in classical forming processes. Beyond this, the failure modes of different tool materials and solutions are presented. The tested materials are hot-working tool steels. Other possibilities and tool coating or surface treatments are discussed as well. [less ▲]Detailed reference viewed: 19 (5 ULg) An adapted staining-destaining method to sort soft-bottom macrobenthos mixed with Posidonia oceanica fibersDonnay, Annick; Pelaprat, C; Lejeune, P et alin Mediterranean Marine Science (2013), 14(1), 92-94Sorting   of   soft-­bottom   macrobenthos   entangled   with   Posidonia   oceanica fibers is time-consuming and tedious because of the weak of colour contrast .  This   paper   describes   a   staining ... [more ▼]Sorting   of   soft-­bottom   macrobenthos   entangled   with   Posidonia   oceanica fibers is time-consuming and tedious because of the weak of colour contrast .  This   paper   describes   a   staining-­destaining   technique   that   produces   good   contrast   between   soft-­bottom   macrobenthos  and  Posidonia  oceanica fibers. The method has been tested on Corsican samples in oligotrophic areas characterized by small-size soft-bottom macrofauna. Our technique saves sorting time (-24%) and is simple to implement. [less ▲]Detailed reference viewed: 15 (1 ULg) Suivi par diffusion des rayons X aux petits angles de la formation de gels de résorcinol-formaldéhydeGommes, Cédric ; Job, Nathalie Poster (2013)Detailed reference viewed: 10 (0 ULg) Tolvaptan in autosomal dominant polycystic kidney disease.JOURET, François ; Krzesinski, Jean-Marie in New England Journal of Medicine [=NEJM] (2013), 368(13), 1258-9Detailed reference viewed: 14 (5 ULg) The multiple SEA method: a method to synthesize Pt/carbon xerogel catalysts for Proton Exchange Membrane fuel cellsZubiaur, Anthony ; Chatenet, Marian; Maillard, Frédéric et alin Proceedings of the Fundamentals and Development of Fuel cells 2013 conference (2013)Detailed reference viewed: 6 (4 ULg) compte rendu de l'ouvrage Müller, Roman. Antike Dichtungslehre: Themen und Theorien. Tübingen: Francke Verlag, 2012. 270 p. € 58.00 (pb). ISBN 9783772084621.Rochette, Bruno in Bryn Mawr Classical Review [=BMCR] (2013)Detailed reference viewed: 14 (0 ULg) "Traduire ou ne pas traduire" : un dilemme bien connu des auteurs grecs et latinsRochette, Bruno in Bonnet-Bouchet, Corinne-Florence (Ed.) Translatio : traduire et adapter les Anciens (2013)Detailed reference viewed: 4 (1 ULg) CONTROLLED AND AUTOMATIC MEMORY RETRIEVAL IN ALZHEIMER’S DISEASEBastin, Christine ; Genon, Sarah ; Willems, Sylvie et alin Proceedings of the 8th Panhellenic Interdisciplinary Conference of Alzheimer's Disease and Related Disorders (2013)Detailed reference viewed: 13 (1 ULg) Evaluation of a new biocompatible poly(N-(morpholino ethyl methacrylate)-based copolymer for the delivery of ruthenium oligonucleotides, targeting HPV16 E6 oncogeneReschner, Anca ; Shim, Yong Ho; Dubois, Philippe et alin Journal of Biomedical Nanotechnology (2013), 9This study investigates the use of a new biocompatible block copolymer poly(2-(dimethylamino)ethyl methacrylate-N-(morpholino)ethyl methacrylate (PDMAEMA-b-PMEMA) for the delivery of a particular ... [more ▼]This study investigates the use of a new biocompatible block copolymer poly(2-(dimethylamino)ethyl methacrylate-N-(morpholino)ethyl methacrylate (PDMAEMA-b-PMEMA) for the delivery of a particular antisense oligonucleotide targeting E6 gene from human papilloma virus. This antisense oligonucleotide was derivatized with a polyazaaromatic RuII complex which, under visible illumination, is able to produce an irreversible crosslink with the complementary targeted sequence. The purpose of this study is to determine whether by the use of a suitable transfection agent, it is possible to increase the efficiency of the antisense oligonucleotide targeting E6 gene, named Ru-P-4. In a recent study, we showed that Oligofectamine® transfected Ru-P-4 antisense oligonucleotide failed to inhibit efficiently the growth of cervical cancer cell line SiHa, contrarily to the Ru-P-6 antisense oligonucleotide, another sequence also targeting the E6 gene. The ability of PDMAEMA-b-PMEMA to form polyplexes with optimal physicochemical characteristics was investigated first. Then the ability of the PDMAEMA-b-PMEMA/Ru-P-4 antisense oligonucleotide polyplexes to transfect two keratinocyte cell lines (SiHa and HaCat) and the capacity of polyplexes to inhibit HPV16 + cervical cancer cell growth was evaluated. PDMAEMA-b-PMEMA base polyplexes at the optimal molar ratio of polymer nitrogen atoms to DNA phosphates (N/P), were able to deliver Ru-P-4 antisense oligonucleotide and to induce a higher growth inhibition in human cervical cancer SiHa cells, compared to other formulations based on Oligofectamine®. [less ▲]Detailed reference viewed: 24 (5 ULg) Impact du séchage sur la viabilité de Pseudomonas fluorescensMputu Kanyinda, Jean-Noël in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2013)The drying Pseudomonas fluorescens makes more economical storage, transportation and marketing. It aims to stop and to stabilize all biological activities for an optimal storage, compatible with the ... [more ▼]The drying Pseudomonas fluorescens makes more economical storage, transportation and marketing. It aims to stop and to stabilize all biological activities for an optimal storage, compatible with the conservation of maximum viability of microorganisms desired. The viability of bacteria after drying depends on the operating conditions of the latter. One of the most important criteria to consider during the drying of biologically active products is the quality of the final dried product. Freeze-drying is the most drying method used for Pseudomonas. But temperature changes it induced are not without consequence for the cells. They are responsible for cell damage (peroxidation of fatty acids) and genetic (proteins and DNA oxidation). However, use of protective compounds during freeze-drying and during storage increases significantly the rate of cell viability. [less ▲]Detailed reference viewed: 4 (0 ULg) Available technical flexibility for balancing variable renewable energy sources: case study in BelgiumQuoilin, Sylvain ; Verbruggen, Avielin Proceedings of the 8th Conference on Sustainable Development of Energy, Water and Environment Systems (2013)The world is facing a historical increase in energy demand and energy consumption. Renewable energy sources are considered as a solution to both environmental issues and increasing energy demand, but ... [more ▼]The world is facing a historical increase in energy demand and energy consumption. Renewable energy sources are considered as a solution to both environmental issues and increasing energy demand, but present high variability and low predictability. Variability and uncertainty are familiar aspects of all power systems. However, the increase of the share of renewable sources leads to new needs in terms of flexible resources. These resources can be provided by four different means: 1. Dispachable power plants (i.e with ramp up and ramp down capabilities) 2. Storage systems, mainly in the form of pumping stations. 3. Grid interconnections between countries 4. Demand side management. The present work focuses on the high voltage transmission grid, and assesses the amount of technical flexibility available to balance the fluctuations of Variable Renewable Energy (VRE) sources. The model is based on a dynamic programming unit commitment algorithm (i.e. accounting for each individual power plant on the grid) and focuses more particularly on the flexibility potential of power plants and of energy storage. The selected time resolution is one hour. Residual load curves are established on the basis of actual consumption for the year 2012 and on different scenarios of solar and wind penetration. The method is applied to the case of Belgium, based on actual disaggregated power consumption curves throughout the year, and on the current power generation park. Due to the difficulty to assess the flexible resource available through interconnections, the Belgian grid is considered isolated. It should also be noted that this work does not address the voltage stability issue: it focuses on balancing issues only (i.e. time constants varying between minutes and days). Simulation results show the VRE penetration potential is higher than usually considered. Bottlenecks therefore seems to be related to improper or inefficient market mechanisms, unable to take full profit of the technical flexible resource available. [less ▲]Detailed reference viewed: 30 (4 ULg)