Last 7 days
Bookmark and Share    
Peer Reviewed
See detailAdolescents et délinquance : Quelles représentations de la sexualité et de la pornographie, pour quelle sexualité ?
Puglia, Rosa ULg; Glowacz, Fabienne ULg

Conference (2014, May)

Bien que la pornographie ne soit pas un phénomène nouveau, ses supports, ses modalités d’accès, son public, etc. se sont vus modifiés suite à l’avènement des nouvelles technologies. Ainsi, de nos jours ... [more ▼]

Bien que la pornographie ne soit pas un phénomène nouveau, ses supports, ses modalités d’accès, son public, etc. se sont vus modifiés suite à l’avènement des nouvelles technologies. Ainsi, de nos jours, les adeptes de ce média peuvent d’un simple clic visionner une variété d’images et de films à caractère pornographique de manière anonyme et gratuite. Alors que de nombreuses questions se posent quant à l’influence de ces médias sur le développement psycho-sexuel et sur les conduites des adolescents, peu d’études y ont été consacrées. Avant de considérer la population délinquante, il était important d’évaluer la consommation pornographique dans une perspective développementale auprès d’une population d’adolescents. Nos recherches se sont centrées, d‘une part sur l’impact de l’accessibilité et de la visualisation de ces médias au niveau des représentations de la sexualité et de la pornographie, et d’autre part, sur l’influence de la consommation pornographique au niveau du développement psycho-sexuel et des pratiques sexuelles des adolescents. Une enquête a été menée auprès de 319 jeunes (150 filles) comprenant, en plus des items se rapportant à la sexualité et la pornographie, plusieurs tests évaluant des dimensions du fonctionnement psychologique et social (test de solitude, recherche de sensation, relations aux pairs, délinquance auto-révélée,... ). Des entretiens semi-directifs ainsi que les différents tests ont été proposés à 20 adolescents délinquants judiciarisés. Nos résultats mettent en évidence que la consommation pornographique influence les représentations (et réciproquement) et certains aspects des pratiques sexuelles des jeunes. Il ressort également que les adolescents délinquants (auto-révélés et judiciarisés) apparaissent comme plus vulnérables par rapport aux sollicitations de ces médias. [less ▲]

Detailed reference viewed: 31 (3 ULg)
See detailVerso il fuorigioco. Una squadra di storie sul calcio
Curreri, Luciano ULg; Comberiati, Daniele

Book published by Il Foglio (2014)

Detailed reference viewed: 15 (0 ULg)
Full Text
Peer Reviewed
See detailStructured reflection breaks embedded in an online course – Effects on learning experience, time on task and performance
Verpoorten, Dominique ULg; Westera, Wim

in Interactive Learning Environments (2014)

The purpose of this paper is to gain insight into the effects of practicing short, frequent and structured reflection breaks interspersed with the learning material in a computer-based course. To that end ... [more ▼]

The purpose of this paper is to gain insight into the effects of practicing short, frequent and structured reflection breaks interspersed with the learning material in a computer-based course. To that end, the study sets up a standardised control trial with 2 groups of secondary-school pupils. The study shows that, while performance is not affected by these embedded “reflection rituals”, they significantly impact time on task and perceived learning. The study also suggests that the exposure to such built-in opportunities for reflection modifies the engagement with the content and fosters the claimed readiness for application of a similar reflective approach to learning in other occasions. [less ▲]

Detailed reference viewed: 8 (0 ULg)
Full Text
See detailL'intensification des procédés chimiques, une approche radicale
Henneuse, Catherine; Monbaliu, Jean-Christophe ULg

Article for general public (2014)

Detailed reference viewed: 11 (1 ULg)
Full Text
See detailL'immatériel en droit international privé - approche belge
Wautelet, Patrick ULg

Scientific conference (2014, May)

Ce rapport a été écrit sur base d'un questionnaire rédigé par le Professeur Tristan Azzi dans le cadre des journées internationales de l'Association Henri Capitant (Barcelone/Madrid 2014). Ce rapport ... [more ▼]

Ce rapport a été écrit sur base d'un questionnaire rédigé par le Professeur Tristan Azzi dans le cadre des journées internationales de l'Association Henri Capitant (Barcelone/Madrid 2014). Ce rapport aborde essentiellement deux questions liées à l'immatériel en droit international privé : le contentieux de la propriété intellectuelle et celui lié à l'usage d'internet. [less ▲]

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailVitamin D status of schoolchildren in Northern Algeria, seasonal variations and determinants of vitamin D deficiency
Djennane, M; Lebbah, S; Roux, C et al

in Osteoporosis International (2014), 25(5), 1493-502

Summary There are no published data on the vitamin D status of children living in North Africa. In 435 healthy Algerian children 5–15 years old, we found that vitamin D insufficiency (serum 25 ... [more ▼]

Summary There are no published data on the vitamin D status of children living in North Africa. In 435 healthy Algerian children 5–15 years old, we found that vitamin D insufficiency (serum 25-hydroxyvitamin D (25OHD) <50 nmol/L) was frequent, especially in winter. Low vitamin D status was associated with increased parathyroid hormone (PTH) and leg deformation Introduction As there are no published data on the vitamin D status of children living in North Africa, we evaluated the 25OHD concentration of healthy Algerian children at the end of summer and at the end of winter. As secondary objectives, we studied the various determinants of vitamin D status and the PTH-25OHD relationship in these subjects. Methods Four hundred thirty-five children 5–15 years old were examined and had a blood sample in September 2010. Of them, 408 were sampled again in March 2011. Results Median 25OHD concentration in the whole group was 71.4 nmol/L in September and 52.9 nmol/L in March. In September, 58.4, 29.9, and 8.1 % had a 25OHD concentration below 75, 50, and 30 nmol/L respectively. In March, these percentages increased to 65.2, 41.4, and 17.4 % for the 75, 50, and 30 nmol/L threshold, respectively. In multivariate analysis, older age, darker skin phototype, low daily vitamin D and calcium intake, poor socioeconomic status, and short daily sun exposure remained significantly associated with a 25OHD <50 nmol/L at both visits. In 72 (16.6 %) children, genu varum/valgum was present. Compared to the 363 children without leg deformation, they presented more frequently with the risk factors of vitamin D insufficiency. They also had lower 25OHD concentrations and higher PTH and tALP. Serum PTH and 25OHD concentrations were negatively and significantly correlated (r=−0.43; p<0.001) without a 25OHD threshold above which PTH does not decrease anymore. Conclusion Despite a sunny environment, vitamin D insufficiency is frequent in healthy Algerian children. [less ▲]

Detailed reference viewed: 14 (1 ULg)
Full Text
See detailSustainable Resource Availability : Ge, Ni, Al three contrasting stories
Pirard, Eric ULg

Conference (2014, May)

The sustainable availability of raw materials used in manufacturing advanced products is a question that consumers will raise more and more in the future. In order to answer this legitimate request it is ... [more ▼]

The sustainable availability of raw materials used in manufacturing advanced products is a question that consumers will raise more and more in the future. In order to answer this legitimate request it is mandatory to define characterization factors capable of taking into account the geological scarcity of an element but also the social and environmental impact of its exploitation and beneficiation. Recent studies (Vieira et al. 2012; Swart el al. 2013) have focused on decreasing ore grades as rough indicators, but clearly such indicators can be severely biased by breakthrough innovations in mining technologies as well as by high metal prices generated by increasing demand. In this paper, we will briefly review three metals that could technically be extracted from very different social and natural environments: Germanium is nowadays mainly a byproduct of coal burnt in China, but could as well be gained from alternative sources such as zinc sulfides. Aluminium is produced from bauxite with Gallium as a byproduct but could technically be extracted from alternative resources such as regionally available clays. Finally, the world nickel production follows two very different processing routes starting either from silicates (laterite deposits) or from sulfides (ultramafic magmas). By comparing the geological; environmental and social impact of mining operations for these three metals, we will try to show what is hidden behind simple ore grades and what indicators should be taken into account in a more complex analysis of sustainable availability. The intention is to build a geographical information system (GIS) of mineral resources and mining operations to help product manufacturers in properly selecting their raw materials providers. Vieira, M.D.M., Goedkoop, M.J., Storm, P. and Huijbregts, M.A.J., 2012, Ore grade decrease as a life cycle impact indicator for metal scarcity : The case of copper. Environ. Sci. Technol. 46, 12772-12778 Swart, P. and Dewulf, J., 2013, Quantifying the impacts of primary metal resource use in life cycle assessment based on recent mining data. Resources, Conservation and Recycling, 73, 180-187. [less ▲]

Detailed reference viewed: 14 (2 ULg)
Full Text
Peer Reviewed
See detailHeterochrony in a complex world: disentangling environmental processes of facultative paedomorphosis in an amphibian
Denoël, Mathieu ULg; Ficetola, Gentile Francesco

in Journal of Animal Ecology (2014), 83(3), 606-615

1. Heterochrony, the change in the rate or timing of development between ancestors and their descendants, plays a major role in evolution. When heterochrony produces polymorphisms, it offers the ... [more ▼]

1. Heterochrony, the change in the rate or timing of development between ancestors and their descendants, plays a major role in evolution. When heterochrony produces polymorphisms, it offers the possibility to test hypotheses that could explain its success across environments. Amphibians are particularly suitable to exploring these questions because they express complex life cycles (i.e. metamorphosis) that have been disrupted by heterochronic processes (paedomorphosis: retention of larval traits in adults). The large phenotypic variation across populations suggests that more complex processes than expected are operating, but they remain to be investigated through multivariate analyses over a large range of natural populations across time. 2. In this study we compared the likelihood of multiple potential environmental determinants of heterochrony. We gathered data on the proportion of paedomorphic and metamorphic palmate newts (Lissotriton helveticus) across more than 150 populations during 10 years, and used an information-theoretic approach to compare the support of multiple potential processes. 3. Six environmental processes jointly explained the proportion of paedomorphs in populations: predation, water availability, dispersal limitation, aquatic breathing, terrestrial habitat suitability, and anti-predator refuges. Analyses of variation across space and time supported models based on the advantage of paedomorphosis in favourable aquatic habitats. 4. Paedomorphs were favoured in deep ponds, in conditions favourable to aquatic breathing (high oxygen content), with lack of fish, and surrounded by suitable terrestrial habitat. Metamorphs were favoured by banks allowing easy dispersal. 5. These results indicate that heterochrony relies on complex processes involving multiple ecological variables and exemplifies why heterochronic patterns occur in contrasted environments. On the other hand, the fast selection of alternative morphs shows that metamorphosis and paedomorphosis developmental modes could be easily disrupted in natural populations. [less ▲]

Detailed reference viewed: 164 (79 ULg)
Full Text
Peer Reviewed
See detailThe XMM-Newton view of the yellow hypergiant IRC+10420 and its surroundings
De Becker, Michaël ULg; Hutsemekers, Damien ULg; Gosset, Eric ULg

in New Astronomy (2014), 29

Among evolved massive stars likely in transition to the Wolf-Rayet phase, IRC +10420 is probably one of the most enigmatic. It belongs to the category of yellow hypergiants and it is characterized by ... [more ▼]

Among evolved massive stars likely in transition to the Wolf-Rayet phase, IRC +10420 is probably one of the most enigmatic. It belongs to the category of yellow hypergiants and it is characterized by quite high mass loss episodes. Even though IRC+10420 benefited of many observations in several wavelength domains, it has never been a target for an X-ray observatory. We report here on the very first dedicated observation of IRC+10420 in X-rays, using the XMM-Newton satellite. Even though the target is not detected, we derive X-ray flux upper limits of the order of 1–3 ×10−14 erg cm−2 s−1 (between 0.3 and 10.0 keV), and we discuss the case of IRC+10420 in the framework of emission models likely to be adequate for such an object. Using the Optical/UV Monitor on board XMM-Newton, we present the very first upper limits of the flux density of IRC +10420 in the UV domain (between 1800 and 2250 Å and between 2050 and 2450 Å). Finally, we also report on the detection in this field of 10 X-ray and 7 UV point sources, and we briefly discuss their properties and potential counterparts at longer wavelengths. [less ▲]

Detailed reference viewed: 39 (10 ULg)
Full Text
Peer Reviewed
See detailMéthodes chromatographiques génériques de criblage pour lutter contre les médicaments de qualité inférieure
Habyalimana, Védaste; Kalenda Tshilombo, Nicodème; Dispas, Amandine ULg et al

in Spectra Analyse (2014), 43

Poor quality medicines are a danger and a threat to public health. In this context, several generic analytical methods have been developed to screen molecules of interest grouped by pharmacological class ... [more ▼]

Poor quality medicines are a danger and a threat to public health. In this context, several generic analytical methods have been developed to screen molecules of interest grouped by pharmacological class using an innovative strategy based on design of experiments followed in some cases by independent component analysis and calculation of design space. Once validated via the classical total error measurement approach, these methods were applied to quantify antimalarial, non-steroidal anti-inflammatory and antibiotic medicines. Alarming results regarding the dosage of these drugs widely used by people confirm the need to fight against this scourge. [less ▲]

Detailed reference viewed: 7 (0 ULg)
Full Text
See detailSEDIMENTS OXIDATION BY SEAGRASSES: INFLUENCE ON THE S CYCLE IN POSIDONIA OCEANICA (L.) DELILE INTERMATTES DYNAMIC
Abadie, Arnaud ULg; Lejeune, Pierre; Pergent, Gérard et al

Poster (2014, May)

The Mediterranean seagrass Posidonia oceanica forms meadows and develops a complex of rhizomes, roots and sediment which is called “matte”. P. oceanica meadows show discontinuity patterns in the form of ... [more ▼]

The Mediterranean seagrass Posidonia oceanica forms meadows and develops a complex of rhizomes, roots and sediment which is called “matte”. P. oceanica meadows show discontinuity patterns in the form of sand or dead matte (matte without living shoots) patches, called “intermattes”, which can have natural or anthropogenic origins. Mechanical processes (e. g. currents, anchoring) can initiate intermattes formation but their dynamic after creation seems to be linked with the sediment chemistry, especially with S cycle. P. oceanica plays an important role in controlling coastal belowground biogeochemistry, in particular by oxidizing sediments through the release of O2 by roots. This process allows creating more suitable condition for plant growth and colonization. The lack of H2S oxidation in SO4 2- can lead to limitation of the plant development or its regression. In order to investigate the effect of oxidation condition in sediments on intermattes dynamic and the neighboring meadow, we initiate, in December 2013, a study on six intermattes (three natural, three anthropogenic) at different depths in Calvi Bay, in Corsica (France). We hypothesize that redox potential and H2S concentration in sediments play an important role in the regression of P. oceanica meadows, particularly after a mechanical anthropic impact like anchoring. It also may be possible that two different kinds of processes are involved for each type of intermatte. Regular samplings throughout two years are planed with the aim of evaluating the seasonal variations of physicochemical parameters. [less ▲]

Detailed reference viewed: 25 (11 ULg)
See detailLes transferts artistiques dans l'Europe gothique. Repenser la circulation des artistes, des oeuvres, des thèmes et des savoir-faire (XIIe - XVIe siècle)
Van den Bossche, Benoît ULg; Guillouët, Jean-Marie; Dubois, Jacques et al

Book published by A. et J. Picard (2014)

Detailed reference viewed: 25 (6 ULg)
Full Text
See detailLe Pacifisme d'Auguste Beernaert. De l'homme d'Etat à l'homme des Etats
Genin, Vincent ULg

in Espace de Libertés : Magazine du Centre d'Action Laïque (2014), 429

Detailed reference viewed: 11 (1 ULg)
Full Text
See detailRuler cults in practice: Sacrifices and libations for Arsinoe Philadelphos, from Alexandria and beyond
Caneva, Stefano ULg

in Muccioli, Federicomaria; Gnoli, Tommaso (Eds.) Divinizzazione, culto del sovrano e apoteosi. Tra Antichità e Medioevo (2014)

In this paper I discuss the dossier of cults for Arsinoe II Philadelphos to investigate how the worship of a sovereign could concretely become a constitutive part of the religious life of the communities ... [more ▼]

In this paper I discuss the dossier of cults for Arsinoe II Philadelphos to investigate how the worship of a sovereign could concretely become a constitutive part of the religious life of the communities composing a kingdom. I argue that in order to let the worship of a sovereign survive the political context in which it was first conceived, a certain degree of freedom and of individual initiative must have been encouraged among potential worshippers, so that the cults could become part of a durable shared religious and political identity connecting the individual with the collective sphere. [less ▲]

Detailed reference viewed: 14 (1 ULg)
Full Text
See detailClassical and Hellenistic statuettes of the so–called “Temple Boys”: A religious and social reappraisal.
Caneva, Stefano ULg

in Terranova, Chiara (Ed.) La presenza dei bambini nelle religioni del Mediterraneo antico. La vita e la morte, i rituali e i culti tra archeologia, antropologia e storia delle religioni (2014)

Our paper reconsiders the religious and social significance of a corpus of statuettes representing crouching children with jewels and amulets, principally dedicated in shrines on Cyprus from about the ... [more ▼]

Our paper reconsiders the religious and social significance of a corpus of statuettes representing crouching children with jewels and amulets, principally dedicated in shrines on Cyprus from about the mid–fifth century BC down to the Hellenistic period. The most plausible interpretation of these statues, that of votive dedications aiming to evoke divine protection on small children, will be substantiated by discussion of discovery contexts and of the significance of amulets and other objects decorating these statues, as well as by broader considerations on the place of small children in temples. The variety of configurations of these statues will also be taken into account in order to discuss the possibility of various interpretations instead of one single interpretative paradigm. [less ▲]

Detailed reference viewed: 20 (0 ULg)