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See detailTre segnalazioni su Sciascia. Città, solitudini, saggismo e invenzione.
Curreri, Luciano ULg

Article for general public (2017)

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See detailEnergy Efficiency in the Romanian Residential Building Stock: A Literature Review
Muresan, Adina Ana; Attia, Shady ULg

in Renewable and Sustainable Energy Reviews (2017), 74

The building sector in Romania is dominated by residential buildings that are old and have poor thermal performance. As member of the European Union, Romania has to reach the objectives imposed by the ... [more ▼]

The building sector in Romania is dominated by residential buildings that are old and have poor thermal performance. As member of the European Union, Romania has to reach the objectives imposed by the Directive 2009/28/EC and to fulfill the requirements of the Energy Performance of Buildings Directive (EPBD) by year 2020. To reach the 2020 objectives, the old buildings from the Romanian building stock should be rehabilitated and the new buildings should be designed according to the latest thermal performance characteristics. The following paper presents the literature review of building energy performance in Romania. The purpose of the literature review analysis is to provide an overview on current building energy efficiency in Romania. The paper also presents future perspectives on implementation of high performance buildings such as the Passive House (PH), nearly Zero Energy Buildings (nZEB) and Net Zero Energy Buildings (NZEB). The reviewed publications and case studies are classified under three categories: policy and regulations, technology and feasibility. Finally, the paper presents a holistic perspective on the Strength, Weakness, Opportunities and Threats (SWOTs) of energy efficiency in Romania's residential building sector. [less ▲]

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See detailA Multiplatform Experiment to Unravel Meso- and Submesoscale Processes in an Intense Front (AlborEx)
Pascual, Ananda; Ruiz, Simon; Olita, Antonio et al

in Frontiers in Marine Science (2017)

The challenges associated with meso- and submesoscale variability (between 1 and 100 km) require high-resolution observations and integrated approaches. Here we describe a major oceanographic experiment ... [more ▼]

The challenges associated with meso- and submesoscale variability (between 1 and 100 km) require high-resolution observations and integrated approaches. Here we describe a major oceanographic experiment designed to capture the intense but transient vertical motions in an area characterized by strong fronts. Finescale processes were studied in the eastern Alboran Sea (Western Mediterranean) about 400 km east of the Strait of Gibraltar, a relatively sparsely sampled area. In-situ systems were coordinated with satellite data and numerical simulations to provide a full description of the physical and biogeochemical variability. Hydrographic data confirmed the presence of an intense salinity front formed by the confluence of Atlantic Waters, entering from Gibraltar, with the local Mediterranean waters. The drifters coherently followed the northeastern limb of an anticyclonic gyre. Near real time data from acoustic current meter data profiler showed consistent patterns with currents of up to 1 m/s in the southern part of the sampled domain. High-resolution glider data revealed submesoscale structures with tongues of chlorophyll-a and oxygen associated with the frontal zone. Numerical results show large vertical excursions of tracers that could explain the subducted tongues and filaments captured by ocean gliders. A unique aspect of AlborEx is the combination of high-resolution synoptic measurements of vessel-based measurements, autonomous sampling, remote sensing and modeling, enabling the evaluation of the underlying mechanisms responsible for the observed distributions and biogeochemical patchiness. The main findings point to the importance of fine-scale processes enhancing the vertical exchanges between the upper ocean and the ocean interior. [less ▲]

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See detailDécoder les verrous d’apprentissage d’une discipline
Verpoorten, Dominique ULg; Devyver, Julie ULg; Duchâteau, Dominique ULg et al

Conference (2017, February 21)

L’ULg a conduit une expérience pilote avec quelques enseignants. Elle vise à estimer le potentiel didactique et pédagogique d’un travail sur les « verrous d’apprentissage » (traduction délibérément ... [more ▼]

L’ULg a conduit une expérience pilote avec quelques enseignants. Elle vise à estimer le potentiel didactique et pédagogique d’un travail sur les « verrous d’apprentissage » (traduction délibérément adaptée de « bottleneck ») pour lutter contre l’échec, ou plutôt pour relever le défi de l’intégration intellectuelle du plus grand nombre. [less ▲]

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See detailConception of a near-infrared spectrometer for ground-based observations of massive stars
Kintziger, Christian ULg; Desselle, Richard ULg; Loicq, Jerôme ULg et al

in Journal of Astronomical Telescopes, Instruments, and Systems (2017), 3(1), 015002

In our contribution, we outline the different steps in the design of a fiber-fed spectrographic instrument for stellar astrophysics. Starting from the derivation of theoretical relationships from the ... [more ▼]

In our contribution, we outline the different steps in the design of a fiber-fed spectrographic instrument for stellar astrophysics. Starting from the derivation of theoretical relationships from the scientific requirements and telescope characteristics, the entire optical design of the spectrograph is presented. Specific optical elements, such as a toroidal lens, are introduced to improve the instrument’s efficiency. Then the verification of predicted optical performances is investigated through optical analyses, such as resolution checking. [less ▲]

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See detailThe importance of pollen chemistry in evolutionary host shifts of bees
Vanderplanck, Maryse ULg; Vereecken, Nicolas; Grumiau, Laurent et al

in Scientific Reports (2017)

Although bee-plant associations are generally maintained through speciation processes, host shifts have occurred during evolution. Understanding shifts between both phylogenetically and morphologically ... [more ▼]

Although bee-plant associations are generally maintained through speciation processes, host shifts have occurred during evolution. Understanding shifts between both phylogenetically and morphologically unrelated plants (i.e., host-saltation) is especially important since they could have been key processes in the origin and radiation of bees. Probably far from being a random process, such host-saltation might be driven by hidden constraints associated with plant traits. We selected two clades of oligolectic bees (i.e., Colletes succinctus group and Melitta leporina group) foraging on co-flowering but unrelated host-plants to test this hypothesis. We analyzed floral scent, floral color and chemical composition of pollen from host and non-host plants of these two clades. We did not find evidence for host-plant evolution in the Melitta leporina group driven by one of the assayed floral traits. On the contrary, hosts of the C. succinctus group display similar primary nutritive content of pollen (i.e., amino acids and sterols) but not similar floral scent or color, suggesting that shared pollen chemistry probably mediates saltation in this clade. Our study revealed that constraints shaping floral associations are diverse and clearly depend on species life-history traits, but evidence suggests that pollen chemistry may act as a major floral filter and guide evolutionary host-shifts. [less ▲]

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See detailMesure de l'adhérence et principaux paramètres d'influence
Bissonnette, Benoît; Courard, Luc ULg; Garbacz, ANdrzej

Scientific conference (2017, February 20)

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See detailNotions de compatibilité relatives au développement de l'adhérence
Courard, Luc ULg; Garbacz, Andrzej; Bissonnette, Benoît

Scientific conference (2017, February 20)

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See detailSurface characterization methods for quality control of repair
Garbacz, Andrzej; Bissonnette, Benoît; Courard, Luc ULg

Scientific conference (2017, February 20)

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See detailAdhérence des réparations en béton: concepts, facteurs d'influence et évaluation
Bissonnette, Benoît; Courard, Luc ULg; Garbacz, Andrzej

Scientific conference (2017, February 20)

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See detailA Raster SOLAP Designed for the Emergency Services of Brussels Agglomeration
Kasprzyk, Jean-Paul ULg; Donnay, Jean-Paul ULg

in CLOUD COMPUTING 2017 - The Eighth International Conference on Cloud Computing, GRIDs, and Virtualization (2017, February 20)

In order to quickly reach incident locations, emergency services have to fairly distribute their resources on the territory. This distribution is based on an analysis which depends on heterogeneous ... [more ▼]

In order to quickly reach incident locations, emergency services have to fairly distribute their resources on the territory. This distribution is based on an analysis which depends on heterogeneous spatial data like past interventions (recurring risk), specific geographical places (sporadic risk), road network or socio-economic variables. On the other hand, Spatial Online Analytical Processing (SOLAP) tools are designed for the collection and the analysis of large spatial data sets. In this study, an original raster SOLAP model is implemented for emergency services of Brussels agglomeration. It allows decision-makers to freely generate risk maps (continuous fields), depending on several dimensions (time, intervention type, risk type, etc.), and to compare them with the accessibility of firefighters and ambulances. Simulations can also be performed on resources locations to see their impact on the main accessibility. [less ▲]

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See detailHTA et cholestérol : prise en charge intégrée - Cas cliniques
Krzesinski, Jean-Marie ULg

Conference (2017, February 18)

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See detailÉtudier un genre littéraire en Égypte Ancienne : approche(s) et méthode
Motte, Aurore ULg

Conference (2017, February 16)

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See detailDraft Genome of the Axenic Strain Phormidesmis priestleyi ULC007, a Cyanobacterium Isolated from Lake Bruehwiler (Larsemann Hills, Antarctica)
Lara, Yannick ULg; Durieu, Benoit ULg; Cornet, Luc ULg et al

in Genome Announcements (2017)

Phormidesmis priestleyi ULC007 is an Antarctic freshwater cyanobacte- rium. Its draft genome is 5,684,389 bp long. It contains a total of 5,604 protein- encoding genes, of which 22.2% have no clear ... [more ▼]

Phormidesmis priestleyi ULC007 is an Antarctic freshwater cyanobacte- rium. Its draft genome is 5,684,389 bp long. It contains a total of 5,604 protein- encoding genes, of which 22.2% have no clear homologues in known genomes. To date, this draft genome is the first one ever determined for an axenic cyanobacterium from Antarctica. [less ▲]

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See detailDevelopment and implementation of a methodology for hybrid fire testing applied to concrete structures with elastic boundary conditions
Sauca, Ana ULg

Doctoral thesis (2017)

Fire tests remain a precious tool to comprehend the behavior of structures under accidental fire conditions. The common practice in fire testing is to isolate the tested element in a furnace in which the ... [more ▼]

Fire tests remain a precious tool to comprehend the behavior of structures under accidental fire conditions. The common practice in fire testing is to isolate the tested element in a furnace in which the mechanical support conditions are maintained constant throughout the test. However, such tests fail to capture the effect of the structure surrounding the element of interest when this effect cannot be realistically modeled by a free or fixed support condition. It has been observed in large-scale tests that the behavior of entire structures under fire is different compared with the behavior observed in traditional tests on isolated elements. This indicates the importance of capturing accurately the boundary conditions between the element and the remainder of the structure when characterizing the behavior of this element in fire. The literature describes a few attempts at performing fire tests under realistic boundary conditions. In the latter, the tests were still performed on isolated elements but the boundary conditions were updated during the test taking into account the characteristics of the remainder structure. This technique, called hybrid testing, represents an appealing solution to test structural elements under realistic boundary conditions. Hybrid testing is a methodology which offers the advantage of testing singular structural elements (or a group of structural elements) named physical substructure PS while at the same time considering the characteristics of the remainder substructure named numerical NS, thus allowing to model realistic boundary conditions. Pioneering work has been done in the seismic field where this technique is now well described, but the implementation of this methodology for structural fire testing raises important challenges due to the specificities of the field. A few hybrid fire tests have been performed in the past on columns and slabs. Their analysis shows that they all use a similar methodology, which is referred to as the first generation method in this work. The objective of the thesis was to develop and implement a hybrid fire testing methodology on a reinforced concrete beam extracted from a moment resisting frame. Initially, it was intended to build on the first generation method, but after its detailed analysis in the development stage it has been observed that the process can be unstable. The value of the stiffness ratio between the numerical substructure and the physical substructures has been identified as critical in governing the stability of the test, dictating whether the hybrid test needs to be applied in displacement control or force control. This is a severe drawback of the first generation method, as the stiffness ratio is unknown and changing during the test; besides different degrees-of-freedom can require different procedures during the test. Therefore, it has been shown that the first generation method should not be applied as it can lead to instability prematurely during the tests. To overcome the drawbacks of the first generation method, the objective was to develop a new technique that leads to interface equilibrium and compatibility while at the same time is unconditionally stable (i.e. independently of the stiffness ratio). Thus a novel methodology was developed and applied to the case of a concrete beam (PS) being part of a concrete moment resisting frame (NS). The novel method makes use of the PS’s stiffness in addition to the NS’s stiffness as it was the case in the first generation method. The stiffness matrix of the PS is unknown during the test therefore the initial tangent stiffness matrix is considered during the calculations. The latter choice influences the value of the time step to be adopted during the test. Every time step the boundary conditions are updated and it will be discussed how the chosen value can influence the results. A predetermined matrix is used to describe the behavior of the NS during the hybrid fire tests. This approach does not capture the nonlinearity of the remainder but at the same time the implementation is relative simple and the negative effect of the time calculation is eliminated. The procedure to compute the predetermined matrix of the NS is presented in this thesis. One possible direction in the future development of hybrid fire testing is to model the NS in the finite element model. The algorithm of the proposed method is developed and implemented in nonlinear finite element software SAFIR in order to perform virtual hybrid fire tests. The same algorithm is translated in order to be implemented by the company in charge of the control system at the CERIB furnace facility. The thesis also presents a traditional fire test that has been performed on the beam, in order to highlight the differences when testing structural element without and with the real boundary conditions. For the hybrid test, three degrees-of-freedom are controlled at the interface. The furnace facility has an important role to perform successful test where the equilibrium and compatibility are ensured and no instability occurs during the test. The impediments encountered during the tests will be discussed along with the recommendation for a successful hybrid fire test. [less ▲]

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See detailLes plis du visuel. Réflexivité et énonciation dans l’image
Dondero, Maria Giulia ULg; Beyaert-Geslin, Anne; Moutat, Audrey

Book published by Lambert Lucas (2017)

L’ambition de cet ouvrage est de développer en sémiotique visuelle une théorie et une méthodologie originairement formulées en linguistique, celles de l’énonciation. L’analyse énonciative permet de ... [more ▼]

L’ambition de cet ouvrage est de développer en sémiotique visuelle une théorie et une méthodologie originairement formulées en linguistique, celles de l’énonciation. L’analyse énonciative permet de décrire les points de vue à partir desquels l’image a été conçue et d’étudier les valeurs, les formes de vie ainsi que les idéologies offertes à l’observateur. Les plis du visuel revient sur la théorie inaugurale d’Émile Benveniste, sur ses apports et ceux de l’histoire de l’art (Louis Marin, Meyer Schapiro, Victor Stoichita…) et de la sémiotique contemporaine en vue de restituer la trajectoire théorique de la sémiotique visuelle et de dépasser la simple transposition dans l’image d’un appareil formel de l’énonciation validé en linguistique. Cet ouvrage se donne plus exactement pour objectif principal de constituer un organon de concepts inter-définis et d’instruments analytiques permettant de diversifier les différents types d’énonciation dans le cadre du langage visuel, à partir non seulement des constructions langagières de chaque image (type de perspective, rapports entre figure et fond, entre espaces englobant et englobé, entre forme et texture, etc.) mais aussi de leur appartenance à différents domaines socio-culturels (la publicité, l’éducation, la politique, etc.) et à différents médias (le cinéma, l’art numérique, les jeux-vidéo, etc.). Il s’articule en trois parties, « Enonciation et pratiques de l’audiovisuel », « Enonciation et perception. Cas de la peinture, de la photographie et du numérique », et « Enonciation et métalangage visuel », qui explorent trois points fondamentaux de la réflexion sémiotique contemporaine : la question de la transposabilité/transversalité de l’appareil formel de l’énonciation et de la spécificité de chaque pratique médiatique, la relation entre énonciation et perception et les propriétés métalinguistiques de l’énonciation. Au fil des différentes contributions, cet ouvrage propose ainsi un parcours de la sémiotique visuelle qui accompagne l’innovation technologique et médiatique à l’origine des nouvelles formes d’image ; il met l’accent sur la spécificité de l’énonciation dans les langages visuel et audiovisuel et impose une conceptualisation spécifique des contextes médiatiques. [less ▲]

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See detailThe desire of parenthood: intuitive co-parental behaviors and quality of couple relationship among Italian and Belgian same-sex and opposite-sex couples.
Miscioscia, Marina ULg; Blavier, Adelaïde ULg; Pagone, Paolo et al

in Frontiers in Psychology (2017), 8(110),

Studies that focused on family issues have allowed a great understanding of the aspectsrelated to its subsystems, such as parenting desire and its expectations, couples’satisfaction and quality of child’s ... [more ▼]

Studies that focused on family issues have allowed a great understanding of the aspectsrelated to its subsystems, such as parenting desire and its expectations, couples’satisfaction and quality of child’s outcomes. All these aspects are greatly interconnectedand contribute to the creation of specific family dynamics, such as the quality offamily interactions. The present study focuses on intuitive co-parental behaviors andthe quality of couple relationship observed during the decision process (intention anddesire) to be (or become) parents. Our first goal was to explore these aspects ina cross-national sample made of Italian and Belgian heterosexual, lesbian and gaycouples. We then aimed to evaluate if the degree of internalized homophobia affectsco-parental alliance. The quality of couple relationship and co-parental behaviors havebeen evaluated through the recruitment of a group of 115 stable heterosexual, gay andlesbian couples (230 individuals, 20–50 years of age) without children, who wanted tobecome parents. We used the Prenatal Lausanne Trilogue Play to evaluate the Co-parental Alliance; the couple’s satisfaction was assessed with the Dyadic AdjustmentScale and the Internalized Homophobia with the MISS-LG. In line with the existentliterature, the analysis did not find any difference between lesbian, gay and heterosexualcouples in terms of co-parental alliance. High levels of couple adjustment lead to betterparental performances among both Italian and Belgian couples. The results suggestalso that sexual stigma differs from one country to another, and it has an impact on thecapability of managing co-parenting. Clinical implications should be verified in furtherlongitudinal studies in order to observe the impact on the inter-generational transmissionof psychopathology. [less ▲]

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See detailL’habit fait-il le moine ? Le confesseur du Gouverneur des Pays-Bas espagnols (XVIIe siècle)
Pirlet, Pierre-François ULg

Conference given outside the academic context (2017)

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See detailTendances globales, besoins locaux et réponses des politiques de développement rural en Wallonie, Belgique
Dogot, Thomas ULg

Conference given outside the academic context (2017)

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