Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailRepresentations about physical activity among firefighters. A study in Wallonie
Dubru, Gilles ULiege; Gribomont, Antoine; Cloes, Marc ULiege

Poster (2017, July)

Introduction To be a firefighter is a dangerous job. Many authors have found anxiety, stress, depression, sleep disorders, absenteeism and other deviant behaviors in this type of high-risk occupation ... [more ▼]

Introduction To be a firefighter is a dangerous job. Many authors have found anxiety, stress, depression, sleep disorders, absenteeism and other deviant behaviors in this type of high-risk occupation (Fullerton, Ursano & Wang, 2004 ; Carey, Al-Zaiti, Dean, Sessanna & Finnell, 2011 ; Elliot & Kuehl, 2007). Adopting an active lifestyle is therefore very important in reducing these health risks and thus maximizing the chances of staying healthy. It is for this reason that physical activity has an essential role for these people. According to this determining the place occupied by physical activity within the regional Walloon fire servicesseemed relevant. The first step should be to analyse the firefighters’ representations and lifestyle. Methods An online questionnaire (SurveyMonkey) was developed. It proposed a majority of closed-ended questions facing on age (38 ± 10.4 years), BMI (26.1 ± 3.7), gender (96.7% of men), rank, status (38.3% professional), PA representations and practices, well-being and self-esteem, job satisfaction, … We contacted one of the main firefighters association (FRCSPB) to reach a significant number of topics. 443 questionnaires were collected during a five weeks period. 394 were usable. 376 responses were needed to achieve a 95% confidence level with a 5% confidence interval based on all Belgian Firefighter. Results and discussion Results showed that firefighter showed positive representations about PA and were aware of the benefits of a regular practice on their health. Good stress management and cardiovascular endurance qualities were considerate as important in this profession. Nevertheless, subjects deplored a lack of maintenance of these qualities. The mean BMI of the subjects was above 26, indicating a slight overweight. Sedentary lifestyle, poor infrastructure, injuries due to lack of fitness allow us to suspect an insufficient training. Other factors were pointed out by the subjects (stress, absenteeism, deviant behavior…). Firefighters were generally satisfied with their job and considered that they have an acceptable quality of life. However lack of time, financial and human resources must not be a barrier to the practice of essential PA for those people who are directly related with danger. References Carey, M. G., Al-Zaiti, S. S., Dean, G. E., Sessanna, L., & Finnell, D. S. (2011). Sleep problems, depression, substance use, social bonding, and quality of live in professional firefighters. The international journal of occupational and environmental medicine, 53(8), 928-933. Doi: 10.1097/JOM.0b013e318225898f. Elliot, D. L., & Kuehl, K.S. (2007). The effects of sleep deprivation on firefighters and EMS responders: final report. International Association of fire Chiefs. Fullerton, C. S., Ursano, R.J.,& Wang, L. (2004). Acute stress disorder, posttraumatic stress disorder, and depression in disaster or rescue workers. The American Journal of Psychiatry, 161(8), 1370-76. [less ▲]

Detailed reference viewed: 33 (2 ULiège)
See detailElfriede Jelinek : l'abîme sous nos pieds
Neelsen, Sarah ULiege

Article for general public (2017)

Entretien avec Christian Longchamp sur l’œuvre d'Elfriede Jelinek à l'occasion de la première de l'opéra contemporain "Kein Licht" (mise en scène Nicolas Stehmann , musique Philippe Manoury) à l'Opéra ... [more ▼]

Entretien avec Christian Longchamp sur l’œuvre d'Elfriede Jelinek à l'occasion de la première de l'opéra contemporain "Kein Licht" (mise en scène Nicolas Stehmann , musique Philippe Manoury) à l'Opéra national du Rhin. [less ▲]

Detailed reference viewed: 23 (2 ULiège)
Full Text
Peer Reviewed
See detailPractical Trajectories of Parametric Tools in Small and Medium Architectural Firms
Stals, Adeline ULiege; Elsen, Catherine ULiege; Jancart, Sylvie ULiege

in Future trajectories for computation in design (2017, July)

Initially used as an extension of hand-drawing tools, digital design tools and moreover parametric ones are nowadays deeply modifying the architectural design process. Big offices with star-architects ... [more ▼]

Initially used as an extension of hand-drawing tools, digital design tools and moreover parametric ones are nowadays deeply modifying the architectural design process. Big offices with star-architects were able to adopt these tools but most architects working in a small office are still trying to cope with these parametric design tools. Several questions arise in this regard: what digital tools do architects usually use? Do they express interest for new technologies and software such as parametric ones? What is their understanding of the term “parametric architecture”? Why is this kind of tools still not largely adopted? Going through the results of an online survey, this paper first discusses the meaning of parametric design for architects. The contribution then analyzes the Belgian case regrouping mostly small and medium offices. It reflects particularly on the way architects do or do not implement these new digital tools in their workflows, and it sheds light on the fact that parametric tools also have the potential to free the creativity of SME’s. [less ▲]

Detailed reference viewed: 60 (20 ULiège)
Full Text
Peer Reviewed
See detailComparison of a dynamic model and experimental results of a residential heat pump with vapor injection and variable speed scroll compressor
Dechesne, Bertrand ULiege; Gendebien, Samuel ULiege; Lemort, Vincent ULiege et al

in PROCEEDINGS OF ECOS 2017 (2017, July)

The first part of this paper presents a Modelica-based dynamic model of the system. Finite-volume models are used for the heat exchangers and the evaporator model takes into account frost formation. A ... [more ▼]

The first part of this paper presents a Modelica-based dynamic model of the system. Finite-volume models are used for the heat exchangers and the evaporator model takes into account frost formation. A thermodynamic model of the vapor injection scroll compressor is developed using empirical correlations for the volumetric efficiency, isentropic efficiency and the ratio between the injection and suction mass flow rate. The second part presents experimental results of a vapor injection and variable speed scroll compressor air to water residential heat pump. The unit is a 10kW residential system working with R410a as working fluid and capable of providing floor heating and domestic hot water. It was tested in a controlled environment in order to achieve a wide range of outdoor, including frosting conditions, and indoor conditions. The model predictions and experimental results are compared in order to validate the component models in steady state. The experimental investigations showed that there is room for improvement on the control side of the system and the developed model can be used in order to develop model based control of the injection and outdoor electronic expansion valves. [less ▲]

Detailed reference viewed: 14 (0 ULiège)
Full Text
See detailAgency and delinquency among adolescence during their transition to adulthood: what role in the desistance process?
Puglia, Rosa ULiege; Glowacz, Fabienne ULiege

Poster (2017, June 31)

Recent studies have shown that agency plays an important role in the desistance process. This variable allows the transition from delinquent identity to non-delinquent identity. However, despite ... [more ▼]

Recent studies have shown that agency plays an important role in the desistance process. This variable allows the transition from delinquent identity to non-delinquent identity. However, despite increasing literature about this topic, there is a lack of consensus regarding the role of this variable in the desistance process. Also, the way to measure this phenomenon remains unclear. In our study, agency is thought within a border framework, namely the understanding of all kind of behavior. According to the social cognitive theory, emotional and cognitive processes influence human behavior: emotions and thoughts that will define ways of acting and will motivate behavioral changes. Outcomes expectancies can be help or hinder for the concretization of behavioral change. We conducted a qualitative research among adolescents (aged 17-18) who are engaged in a delinquent trajectory. Our objective are to understand how these young in transition to adulthood leave delinquent lifestyle by evaluating to their life course and delinquent course. Each participant was interviewed with a semi-structured interview. To ensure that the interviews provided rich insights into participants’ reality, the interview was designed to elicit detailed information on relevant themes including identity, turning point, future and delinquency trajectory. Desistance was not explicitly questioned. All interviews were taperecorded and analyzed using IPA method (Smith, 2003). Mastery Scale (Pearlin, 1978), Causal Attribution Scale (Rossier, 2002), Hope Scale (Snyder, 1991) and University Rhode Island Change Assessment Scale (McConnaughy, 1983) were also administered. We see that the younths interviewed are at different stage in their desistance process. All of them, persistent or desistant, consider taking a hold on their lives. These results encourage thinking agency in the understanding of all kind of behavior. We should then take into account the beliefs and expectations of results as a variable mediating the relationship between agency and desistance. [less ▲]

Detailed reference viewed: 20 (1 ULiège)
Peer Reviewed
See detailPopular Music Studies in French Universities
Pirenne, Christophe ULiege

Conference (2017, June 30)

Since the turn of the century, the study of popular music has become one of the hottest topics in French Universities. Of the 71 existing institutions, nearly all of them have one or another official ... [more ▼]

Since the turn of the century, the study of popular music has become one of the hottest topics in French Universities. Of the 71 existing institutions, nearly all of them have one or another official expert on that question. But between the study of a national or an international heritage, between scientific disciplines and humanities, researches devoted to popular music seems to be as perennial as fragmented. My paper will aim to present the evolution of recruitment in this area. Which disciplines were the most active in those recruitments and, beyond these raw numbers, what does it mean ? Why is the French academic situation so different to that of Italy for example ? What are the challenges of this academisation ? Which topics are taught under this heading ? I’d like to show that next to the objective reasons of this disciplinary interest, there are also various institutional issues that seems to correspond exactly to the assumptions of Bruno Latour (La science en action, 1989) and Edward Slowik (Structure of Musical Revolutions, 2007). [less ▲]

Detailed reference viewed: 14 (1 ULiège)
Peer Reviewed
See detailThe role of Gender, Race, and Class in Transnational Political Movements: Mexican and Colombian Women Engaging in Homeland Politics from Europe’s Capital
Lara-Guerrero, Larisa; Vivas Romero, Maria ULiege

Conference (2017, June 30)

Drug trafficking is a mounting security problem in Latin America, specifically for the primary producers of narcotics in the region: Mexico and Colombia. The security concern from both countries has ... [more ▼]

Drug trafficking is a mounting security problem in Latin America, specifically for the primary producers of narcotics in the region: Mexico and Colombia. The security concern from both countries has triggered the political and social mobilization of Mexican and Colombian migrants from abroad many of them from the Global City of Brussels. This paper unpacks the motivations and dynamics behind transnational political activism organized by Mexican and Colombian women living in Brussels. By integrating and revising insights from social movements theories, political transnationalism from migration studies and intersectionality studies, this paper elaborates on the role of migrant women organizing and sustaining transnational political movements to change the political conditions of their countries of origin. The ethnographic evidence presented in this paper reveals the importance to recognize the individual level in the analysis of transnational movements. Women are cognitive actors with political ideals and emotions whose political activism is highly influenced by social categorizations such as gender, race, class, and generation. [less ▲]

Detailed reference viewed: 25 (4 ULiège)
Full Text
See detailTable ronde : La formation continue chez les psychologues spécialisés en gérontologie : Pourquoi, pour quoi, par qui, quand et comment ?
Grotz, Catherine ULiege; Lagarde, Alexia; Stoykova, Ralitsa et al

Scientific conference (2017, June 30)

Detailed reference viewed: 13 (1 ULiège)
Full Text
See detailCaractérisation des argiles utilisées dans le secteur de la terre cuite de la région de Marrakech en vue d'améliorer la qualité des produits
El Boudour El Idrissi, Hicham ULiege

Doctoral thesis (2017)

The purpose of this study is to characterize the clay raw materials being exploited and used in the earthenware sector (pottery and building materials) of Marrakech region. It aims to improve product ... [more ▼]

The purpose of this study is to characterize the clay raw materials being exploited and used in the earthenware sector (pottery and building materials) of Marrakech region. It aims to improve product quality in 12 sites within a radius of 10 to 80 km around the city of Marrakech, where are active more than 850 potters spread over about 550 workshops. This characterization also aims at establishing a database on the properties of the raw materials of Marrakech and on the characteristics of the products. This will help in the selection of the most suitable materials, which generate the least defects, in restoring the historical sites of the city and in linking archaeological ceramics with their possible source of clayey material. A total of 34 samples of clay raw materials were collected from the various studied sites. 26 ceramic pastes were formed from these raw materials. Ceramic pastes have been characterized for their particle size (semi-wet sieving and laser particles size), chemical (XRF) and mineralogical compositions (XRD), plasticities (Atterberg limits), carbonate content (Bernard's calcimetry), drying behaviour (Bigot curve) and loss on ignition. The fired products were characterized by firing shrinkage, water porosity, compressive and flexural strengths and by SEM combined with EDX. The studied ceramic pastes show a large particle size variation: clay (18-66%), silt (12-53%) and sand (5-65%). Mineralogically, they are composed mainly of clay minerals (25-60%), quartz (20-55%), feldspars (5-35%), carbonates (≤15%), diopside (5-10%) and hematite (1-3%). Clay minerals are formed by illite (10-40%), kaolinite (5-15%), interstratified (≤10%), talc and pyrophyllite (≤10%), vermiculite (5%) and chlorite (≤5%). The chemical composition shows that the majority of the pastes are composed of SiO2 (48-74%), Al2O3 (12-20%), Fe2O3 (3-8%), CaO (0.4-8%), K2O (2-5%), MgO (0.5-3.5%), Na2O (0.1-2%), TiO2 (0.8-1.2%), P2O5 (≤ 0.4%) and MnO (≤ 3%). Plasticity varies from one paste to another with plasticity indices between 15 and 32. The shrinkage on drying is between 4 and 10%. For a firing temperature of 1050°C, the firing shrinkage of the various pastes is between 0.5 and 5%. The mineral transformations during firing are very diversified from one sample to another and from one site to another. The comparison of the obtained results shows that granulometry, mineralogy and degree of diagenesis are the main factors controlling plasticity. We showed a relationship between the properties of the pastes (particle size, mineralogy and plasticity) and the type of product. We proposed solutions for each of the many observed defects (poor quality of raw material, lime blowing, lime efflorescence, inadequate drying procedure, cracking, blisters, black hearts, crazing and poor ovens quality). In addition, this study valuated the clay raw materials of the Marrakech region for the use in the field of production of building materials. [less ▲]

Detailed reference viewed: 48 (8 ULiège)
Full Text
See detailAntarctic cyanobacteria: from diversity to genomics
Wilmotte, Annick ULiege

Conference (2017, June 30)

Detailed reference viewed: 22 (1 ULiège)
Full Text
See detailSoil Acidification in Southern China: Spatio-temporal Evolution and Effects on Phosphorus Availability
Zhou, Xiaoyang ULiege

Doctoral thesis (2017)

Rapid industrial development and intensive agriculture induced serious soil degradation in recent decades worldwide and specifically in China. In cropland, soil acidification and nutrient deficiency are ... [more ▼]

Rapid industrial development and intensive agriculture induced serious soil degradation in recent decades worldwide and specifically in China. In cropland, soil acidification and nutrient deficiency are often associated with increased use of nitrogen (N) fertilizers. Soil acidification can lead to reduction of phosphorus (P) availability, even though with high inputs of P fertilizer. The studies presented in the thesis deal with spatio-temporal evolution of soil pH in different soil types and land uses in southern China and effects of soil acidification on soil P availability. Evolution of inorganic P fractions in Red Soil was characterized upon fertilization trials, as a response to long-term fertilization and soil acidity changes. The first focus of the thesis deals with spatio-temporal evolution and main factors of soil acidification in different soil types, parent materials and land uses of Southern China. Firstly, data from 20 monitoring sites under 25-year fertilization on Paddy Soil were investigated to research changes of pH. Paddy Soil pH significantly declined from 1988-1998, then stabilized from 1998-2013 with conventional fertilization. Chemical N fertilization, manure application, soil available N and total N increases were significantly correlated with soil pH. Secondly, changes of pH in Red Soil and Paddy Soil were assessed in 32 monitoring sites of Hunan Province (Southern China) under 10-year fertilization in order to analyze soil acidification in different soil types and agro-systems. Soil pH decline was observed in Paddy Soils under rice-vegetable rotation but not observed in Paddy Soil under continuous cropping with rice. Soil pH significantly declined in Red Soil with high initial soil pH. Thirdly, spatio-temporal characteristics of soil pH were investigated by comparison of soil pH between 1982 and 2014 in Qiyang County (Hunan Province). Average topsoil pH declined of 0.58 units between the two surveys. Soil pH in the south was lower than in the north both in 1982 and 2014. Land use and parent materials are the main drivers of differences in the soil pH changes in Qiyang County. Soil pH declined significantly in forest and upland crop over non-alkaline parent materials during 1982-2014 period. Chemical N fertilizer application can have generated 12-42 kmol H+ ha-1yr-1, which is much higher than removal by crop harvest. Reduction of chemical N fertilization and return of straws to field should be conducted to reduce H+ production and supplement base cations in Qiyang County. The second approach studied evolution of inorganic P fractions in Red Soil under 25-year fertilization, and available P and inorganic P fractions responses to various soil acidity levels. Inorganic P fractions increased under P fertilization from 1990-2015, especially Ca2-P, Ca8-P and Al-P, but inorganic P fractions significantly decreased without P fertilization. Contributions of soil properties (SOC, C:P ratio and N:P ratio) and cumulative P apparent balance (CPAB) to inorganic P fractions were ≥ 95%, while interaction of CPAB and soil properties made greater contributions than did any single factor. Soil dissolved inorganic P (DIP) decreased with rising pH value, and a minimum DIP was observed between pH 5.5 and 6.5. Olsen-P, Ca-P and Al-P increased significantly with pH between 3.4 and 5.0. Soil with pH <5.0 P availability was much lower than soil with pH ≥5.0. Managing soil acidity is a key issue regarding availability of P in Red Soil of China and our results suggest that at least a pH of 5.0 should be targeted. [less ▲]

Detailed reference viewed: 35 (1 ULiège)
Full Text
Peer Reviewed
See detailNatural and induced loss of function mutations in SlMBP21 MADS-box gene led to jointless-2 phenotype in tomato
Gomez Roldan, Maria Victoria; Périlleux, Claire ULiege; Morin, Halima et al

in Scientific Reports (2017), 7

Abscission is the mechanism by which plants disconnect unfertilized flowers, ripe fruits, senescent or diseased organs from the plant. In tomato, pedicel abscission is an important agronomic factor that ... [more ▼]

Abscission is the mechanism by which plants disconnect unfertilized flowers, ripe fruits, senescent or diseased organs from the plant. In tomato, pedicel abscission is an important agronomic factor that controls yield and post-harvest fruit quality. Two non-allelic mutations, jointless (j) and jointless-2 (j-2), controlling pedicel abscission zone formation have been documented but only j-2 has been extensively used in breeding. J was shown to encode a MADS-box protein. Using a combination of physical mapping and gene expression analysis we identified a positional candidate, Solyc12g038510, associated with j-2 phenotype. Targeted knockout of Solyc12g038510, using CRISPR/Cas9 system, validated our hypothesis. Solyc12g038510 encodes the MADS-box protein SlMBP21. Molecular analysis of j-2 natural variation revealed two independent loss-of-function mutants. The first results of an insertion of a Rider retrotransposable element. The second results of a stop codon mutation that leads to a truncated protein form. To bring new insights into the role of J and J-2 in abscission zone formation, we phenotyped the single and the double mutants and the engineered alleles. We showed that J is epistatic to J-2 and that the branched inflorescences and the leafy sepals observed in accessions harboring j-2 alleles are likely the consequences of linkage drags. [less ▲]

Detailed reference viewed: 66 (8 ULiège)
Peer Reviewed
See detailLa narrativité greimassienne comme élément d'organisation du sens dans le croisement du football et la publicité
Bassilua Nzuzi, Anicet ULiege

Conference (2017, June 30)

Considérée comme principe d’organisation du discours (Greimas et Courtés, 1979), la narrativité greimassienne semble garder ce statut au-delà des types d’objets sur lesquels elle a été testée à l’origine ... [more ▼]

Considérée comme principe d’organisation du discours (Greimas et Courtés, 1979), la narrativité greimassienne semble garder ce statut au-delà des types d’objets sur lesquels elle a été testée à l’origine, par exemple le système d’oppositions dans les figures-signes. Notre étude, consacrée aux pratiques du football et de la publicité telles qu’elles se réalisent et se croisent au stade, montre que la narrativité, en lien avec le système tensif des possibles, organise aussi le parcours du sens dans cette interaction. Cette opération se déroule à deux niveaux de pertinence hiérarchisés: niveau de l’organisation syntagmatique de chacun des deux ensembles (niveau inférieur) et niveau de leurs ajustements l’un vers l’autre (niveau supérieur). On repère ainsi, pour le football, par exemple une organisation syntagmatique qui se réalise par la succession des séquences (passe, tacle, but, etc.) qu’opèrent des sujets (joueurs) à partir d’un système ordonné des modes d’existence des unités (potentialisation /virtualisation - actualisation/réalisation). Pour la publicité, cela se réalise à travers l’agencement des syntagmes (topologiques, eidétiques, chromatiques) qui s’inscrivent sur les objets-supports (panneaux) selon le même schéma. Les deux univers s’ajustent par la suite grâce à la combinaison de deux types d’articulations (statiques et dynamiques) qui, au final, aboutit à la formation d’une sorte de discours englobant “football-publicité” qui présente une organisation syntaxique propre. [less ▲]

Detailed reference viewed: 66 (1 ULiège)
See detailEcolo lave-t-il plus vert ?
Van Ruymbeke, Laurence; Grandjean, Geoffrey ULiege

Article for general public (2017)

Detailed reference viewed: 19 (1 ULiège)
Full Text
See detailPhD Support Day - présentation Justine Contor
Contor, Justine ULiege

Scientific conference (2017, June 30)

Il s'agit d'une présentation des mes travaux de recherche dans le cadre d'une journée d'échange entre les doctorant du Professeur Nadia Molenaers.

Detailed reference viewed: 10 (0 ULiège)
Full Text
Peer Reviewed
See detailSmall solar system bodies as granular systems
Hestroffer, Daniel; Campo Bagatin, Adriano; Losert, Wolfgang et al

in EPJ Web of Conferences (2017, June 30)

Detailed reference viewed: 37 (3 ULiège)
Full Text
Peer Reviewed
See detailVibration Induced Phenomena in Granular Media in Microgravity
Opsomer, Eric ULiege; Noirhomme, Martial ULiege; Vandewalle, Nicolas ULiege

in EPJ Web of Conferences (2017, June 30)

Detailed reference viewed: 28 (3 ULiège)