Last 7 days
Bookmark and Share    
Full Text
See detailStratospheric circulation in the WACCM chemistry-climate model: mean age of air against observations and CTM
Minganti, Daniele ULiege

Poster (2017, October)

The mean age of air is a classical diagnostic of the transit time from the troposphere to the various regions of the stratosphere, providing insights on the strength and structure of the Brewer-Dobson ... [more ▼]

The mean age of air is a classical diagnostic of the transit time from the troposphere to the various regions of the stratosphere, providing insights on the strength and structure of the Brewer-Dobson Circulation (BDC), the polar vortex and the irreversible mixing in the mid-latitudes. We apply this diagnostic to the WACCM chemistry-climate model for the 1985-2014 period. A comparison is presented between unconstrained simulations (FR-WACCM) with and without the representation of the QBO, simulations nudged to the MERRA-2 reanalysis (SD-WACCM), in-situ measurements and a chemistry-transport model (CTM). The results are different depending on the simulation, with SD-WACCM resulting closer to the observations w.r.t. FR-WACCM. In the FR-WACCM the QBO plays a role leading to older age of air. The time evolution over the considered period is slightly decreasing, while observations show a positive (not significant) trend. Given those results, further studies have to be carried out investigating the multi-decadal trends of mean age of air and involving actual tracers. [less ▲]

Detailed reference viewed: 13 (1 ULiège)
Full Text
See detailLe droit du recouvrement en ses aspects notariaux
Georges, Frédéric ULiege

in Leleu, Yves-Henri (Ed.) Chroniques notariales (2017)

Cette contribution analyse d'une part les récentes réformes législatives touchant à la matière abordée et d'autre part la jurisprudence pertinente

Detailed reference viewed: 250 (4 ULiège)
Full Text
See detailEléments relatifs à la saisie-exécution immobilière
Georges, Frédéric ULiege

Scientific conference (2017, October)

Ce document constitue une étude synthétique de la procédure de saisie-exécution immobilière, régie par les articles 1560 à 1626 du Code judiciaire

Detailed reference viewed: 185 (1 ULiège)
Full Text
See detailAdorno in France. The first critical Reception of the Critical Theory in the 50's
Franck, Thomas ULiege

Scientific conference (2017, October)

Detailed reference viewed: 45 (3 ULiège)
See detailD'hier à aujourd'hui, le rôle de la fratrie
Haxhe, Stéphanie ULiege

Conference given outside the academic context (2017)

Detailed reference viewed: 9 (0 ULiège)
Full Text
Peer Reviewed
See detailIntramolecular Continuous-Flow Strategy Towards Methylphenidate (Ritalin) Hydrochloride
Gerardy, Romaric ULiege; Winter, Marc; Vizza, Alessandra et al

Poster (2017, October)

Detailed reference viewed: 8 (1 ULiège)
Full Text
See detailPour une « didactique de l’enquête » : quels fondements, quels outils ?
Jadoulle, Jean-Louis ULiege

Scientific conference (2017, October)

Detailed reference viewed: 16 (1 ULiège)
Full Text
Peer Reviewed
See detailMultidisciplinary rehabilitation program after breast cancer: benefits on physical function, anthropometry and quality of life.
Leclerc, Anne-France ULiege; Foidart-Dessalle, Marguerite ULiege; Tomasella, Marco ULiege et al

in European Journal of Physical and Rehabilitation Medicine (2017), 53(5), 633-642

BACKGROUND: Different clinical trials show beneficial effects of physical training offered during and / or after breast cancer treatment. However, given the variety of side effects that may be encountered ... [more ▼]

BACKGROUND: Different clinical trials show beneficial effects of physical training offered during and / or after breast cancer treatment. However, given the variety of side effects that may be encountered, physical training could be combined with psychological, relational and social guidance. This kind of multidisciplinary program has been little studied so far. AIM: To determine the benefits of a three-month multidisciplinary rehabilitation program among women after breast cancer treatment. DESIGN: Controlled no-randomized trial. SETTING: University for outcomes, University Hospital Center for interventions. POPULATION: Two hundred and nine outpatients who have been treated for a primary breast carcinoma. METHODS: Patients were divided into a control group (n=106) and an experimental group (n=103) which has benefited from a rehabilitation program of three months including physical training and psycho-educational sessions. The assessments, performed before and after the program, included functional assessments ("Sit and Reach Test", maximal incremental exercise test and "Six-Minute Walk Test"), body composition measurements (body mass index (BMI) and body fat percentage) and a questionnaire (European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Core 30). RESULTS: After three months, flexibility, walking distance and all parameters measured during the maximal incremental exercise, except maximal heart rate, were significantly improved in the experimental group. The body fat percentage was significantly decreased and a significant improvement was observed for perceived health status (quality of life), functional role, emotional state, physical, cognitive and social functions and for most symptoms. In the control group, most of these improvements didn't appear and a significant increase in BMI and body fat percentage was observed. CONCLUSIONS: This trial identifies the benefits of a well detailed multidisciplinary rehabilitation program, including physical re-conditioning and psycho-educational sessions, with important improvements in functional capacity, body composition and the majority of functions and symptoms among women after breast cancer treatment. CLINICAL REHABILITATION IMPACT: Through its results, this study could contribute to the development of hospital quality standards for oncologic rehabilitation. Physiotherapists can efficiently propose this kind of multidisciplinary rehabilitation program. [less ▲]

Detailed reference viewed: 94 (24 ULiège)
Full Text
Peer Reviewed
See detailPond drying cues and their effects on growth and metamorphosis in a fast developing amphibian
Székely, Diana ULiege; Denoël, Mathieu ULiege; Székely, Paul et al

in Journal of Zoology (2017), 303(2), 129-135

The hydroperiod of breeding habitats imposes a strong selection on amphibians and pond-breeding species usually exhibit a high degree of plasticity in the duration of larval period. However, the potential ... [more ▼]

The hydroperiod of breeding habitats imposes a strong selection on amphibians and pond-breeding species usually exhibit a high degree of plasticity in the duration of larval period. However, the potential for phenotypic plasticity in fast developing species was investigated only in a small number of anurans, and the specific response to environmental cues such as low water versus decreasing water level, as well as the effects of such cues on particular developmental stages, are even less understood. In this context, we investigated the plastic response to pond desiccation in a neotropical species (Ceratophrys stolzmanni) by raising tadpoles in three water level treatments: constant high, constant low and decreasing. The growth rates were the highest reported for amphibian tadpoles (up to 0.3g/day) and the time to metamorphosis was short in all treatments, with the fastest developing tadpole metamorphosing in only 16 days after egg deposition. Individuals from the constant high water level treatment had a higher growth rate than those in the other two treatments, whereas decreasing and constant low water levels had similar effects on development, speeding up metamorphosis. In turn, this involved a cost as these tadpoles had a lower body size and mass at metamorphosis than the ones raised in constant high water levels. The final stages of metamorphosis, when tadpoles are the most vulnerable, were shorter in tadpoles exposed to a decreasing water level, allowing them to leave water quickly. Our experiment demonstrates that phenotypic plasticity is maintained even in environments devoid of permanent aquatic habitats. Ceratophryd tadpoles are able to shorten their developmental time when they perceive a risk of desiccation and react similarly to cues coming from the two unfavorable water conditions showing their adaptation to ephemeral and unpredictable breeding habitats. [less ▲]

Detailed reference viewed: 51 (11 ULiège)
Full Text
Peer Reviewed
See detailSpatiotemporal variation of drought characteristics in the Huang- Huai-Hai Plain, China under the climate change scenario
Li, Xiangxiang; Ju, Hui; Garré, Sarah ULiege et al

in Journal of Integrative Agriculture (2017), 16(10), 2308-2322

Understanding the potential drought characteristics under climate change is essential for reducing <br />vulnerability and establishing adaptation strategies, especially in the Huang-Huai-Hai Plain (3H ... [more ▼]

Understanding the potential drought characteristics under climate change is essential for reducing <br />vulnerability and establishing adaptation strategies, especially in the Huang-Huai-Hai Plain (3H Plain) which is the grain production base in China. In this paper, the variation of drought characteristics including drought event frequency, duration, severity and intensity for the past 50 years (1961-2010) and future scenarios (2010-2099) based on observed meteorological data and RCP 8.5 projections were investigated, respectively. Firstly, the applicability of three climatic drought indices including the Standardized Precipitation Index (SPI), the Standardized Precipitation Evapotranspiration Index based on the Penman–Monteith equation (SPEI-PM) and the Thornthwaite equation (SPEI-TH) were compared in tracing recorded agricultural drought areas. Then, the drought characteristics including drought event, duration, severity and intensity using “run theory” was analyzed for both historical observations and future RCP 8.5 scenarios based on the proper index. Correlation analysis between drought indexes and agricultural drought areas showed that SPEI-PM performed better than SPI and SPEI-TH in the 3H Plain. Based on the results of SPEI-PM, droughts over the past 50 years have experienced reduced drought with shorter durations, and weaker severity and intensity. However, for the future RCP 8.5 scenario, drought is predicted to rise in frequency, duration, severity and intensity from 2010-2099 although drought components during the 2010-2039 were milder compared to historical conditions. This study highlights that the estimations for atmospheric evaporative demand would bring in differences in long term drought trend of drought indexes and consequently the applicability in 3H Plain. The results of this paper can help inform researchers and local policy makers to establish drought risk management strategies. [less ▲]

Detailed reference viewed: 31 (5 ULiège)
Peer Reviewed
See detailLes biens, la propriété immobilière et la copropriété
Lecocq, Pascale ULiege; Boufflette, Sophie ULiege; Salvé, Arianne ULiege et al

in Leleu, Yves-Henri (Ed.) Chroniques notariales (2017)

Detailed reference viewed: 21 (1 ULiège)
Full Text
Peer Reviewed
See detailWhere Ion Mobility and Molecular Dynamics Meet to Unravel the (Un)Folding Mechanisms of an Oligorotaxane Molecular Switch
Hanozin, Emeline ULiege; Mignolet, Benoît ULiege; Morsa, Denis ULiege et al

in ACS Nano (2017), 11(10), 10253-10263

At the interface between foldamers and mechanically interlocked molecules, oligorotaxanes exhibit a spring-like folded secondary structure with remarkable mechanical and physicochemical properties. Among ... [more ▼]

At the interface between foldamers and mechanically interlocked molecules, oligorotaxanes exhibit a spring-like folded secondary structure with remarkable mechanical and physicochemical properties. Among these properties, the ability of oligorotaxanes to act as molecular switches through controlled modulations of their spatial extension over (un)folding dynamics is of particular interest. The present study aims to assess and further characterize this remarkable feature in the gas phase using mass spectrometry tools. In this context, we focused on the [4]5NPR+12 oligorotaxane molecule complexed with PF6 - counterion and probed its co-conformational states as a function of the in-source-generated charge states. Data were interpreted in light of electronic secondary structure computations at the PM6 and DFT levels. Our results highlight two major co-conformational groups associated either with folded compact structures, notably stabilized by intramolecular π-π interactions and predominant for low charge states or with fully stretched structures resulting from significant Coulombic repulsions at high charge states. Between, the oligorotaxane adopts intermediate folded co-conformations, suggesting a stepwise unfolding pathway under increasing repulsive Coulombic constraints. The reversibility of this superstructural transition was next interrogated under electron-driven (nondissociative electron transfer) and heat-driven (collision-induced unfolding) activation stimuli. The outcomes support the feasibility to either unfold or (partially) refold the oligorotaxane foldamer on purpose in the gas phase. Our results show that the balance between the stabilizing π-π interactions and the versatile Coulomb interactions dictates the elongation state of the foldamer in the gas phase and emphasizes the adequacy of mass spectrometry tools for the superstructural characterization of desolvated prototypical artificial molecular machines. © 2017 American Chemical Society. [less ▲]

Detailed reference viewed: 16 (16 ULiège)
Full Text
See detailLa neutralité du net n'est pas neutre
Gautier, Axel ULiege

in van Pottelsberghe, Bruno (Ed.) Les enjeux de l’innovation : quelles politiques ? Quelles gouvernances ? (2017)

Le principe de neutralité du net gouverne la gestion du trafic de données sur le réseau par les fournisseurs d’accès à internet (FAI) en leur imposant de traiter toutes les données de manière équivalente ... [more ▼]

Le principe de neutralité du net gouverne la gestion du trafic de données sur le réseau par les fournisseurs d’accès à internet (FAI) en leur imposant de traiter toutes les données de manière équivalente. Une des conséquences principales de la neutralité du net pour les FAI est la difficulté d’exiger des paiements de la part des fournisseurs de contenu. Les FAI se plaignent alors d’avoir à supporter seuls tout le poids des investissements dans l’infrastructure du réseau. Même si les analyses économiques ne donnent pas nécessairement droit à cette revendication, force est de constater que le principe de neutralité du net pose des problèmes en termes d’incitations à développer l’infrastructure. Ceci explique que l’on discute de plus en plus de l’opportunité d’accommoder la règle, par exemple en tolérant certaines pratiques récentes des FAI (comme l’exclusion d’applications, le ‘zero rating’ ou l’établissement de ‘voies prioritaires’). En Belgique, les FAI s’écartent relativement peu du principe de neutralité du réseau et que le réseau est, pour l’instant, correctement développé. Il n’en reste pas moins que des investissements conséquents devront rapidement être consentis pour continuer à améliorer l’infrastructure, ce qui, à entendre les FAI, pourrait nécessiter une [less ▲]

Detailed reference viewed: 103 (83 ULiège)
Full Text
Peer Reviewed
See detailIsotopic composition of nitrogen species in groundwater under agricultural areas: A review
Nikolenko, Olha ULiege; Jurado Elices, Anna ULiege; Borges, Alberto ULiege et al

in Science of the Total Environment (2017)

This work reviews applications of stable isotope analysis to the studies of transport and transformation of N species in groundwater under agricultural areas. It summarizes evidence regarding factors ... [more ▼]

This work reviews applications of stable isotope analysis to the studies of transport and transformation of N species in groundwater under agricultural areas. It summarizes evidence regarding factors affecting the isotopic composition of NO3−, NH4+ and N2O in subsurface, and discusses the use of 11B, 18O, 13C, 34S, 87Sr/86Sr isotopes to support the analysis of δ15N values. The isotopic composition of NO3−, NH4+ and N2O varies depending on their sources and dynamics of N cycle processes. The reported δ15N-NO3− values for sources of NO3− are: soil organic N – +3‰–+8‰, mineral fertilizers – −8‰–+7‰; manure/household waste – +5‰ to +35‰. For NH4+ sources, the isotopic signature ranges are: organic matter – +2.4–+4.1‰, rainwater – −13.4–+2.3‰, mineral fertilizers –−7.4–+5.1‰, householdwaste –+5–+9‰; animalmanure–+8–+11‰. ForN2O, isotopic composition depends on isotopic signatures of substrate pools and reaction rates. δ15Nvalues of NO3− are influenced by fractionation effects occurring during denitrification (ɛ=5–40‰), nitrification (ɛ=5–35‰) and DNRA (ɛ not reported). The isotopic signature of NH4+ is also affected by nitrification and DNRA as well as mineralization (ɛ=1‰), sorption (ɛ=1–8‰), anammox (ɛ=4.3–7.4‰) and volatilization (ɛ=25‰). As for theN2O, production of N2O leads to its depletion in 15N, whereas consumption – to enrichment in 15N. The magnitude of fractionation effects occurring during the considered processes depends on temperature, pH, DO, C/NO3− ratio, size of the substrate pool, availability of electron donors, water content in subsoil, residence time, land use, hydrogeology. While previous studies have accumulated rich data on isotopic composition of NO3− in groundwater, evidence remains scarce in the cases of NH4+ and N2O. Further research is required to consider variability of δ15N-NH4+ and δ15N-N2O in groundwater across agricultural ecosystems. [less ▲]

Detailed reference viewed: 54 (12 ULiège)
Peer Reviewed
See detailNew models to predict microcarriers just-suspended state in bioreactors for stem cell culture.
Loubière, Céline; Olmos, Eric; Guedon, Emmanuel et al

Conference (2017, October)

Detailed reference viewed: 12 (2 ULiège)
Full Text
Peer Reviewed
See detailLes savoirs paysans pour coordonner la conservation de la nature et l’agriculture - Piste pour une prise en compte renforcée des compétences des agriculteurs dans l’action agro-environnementale.
Brédart, David; Hatt, Séverin ULiege; Méhu, Marie et al

in Mille Lieux (2017), 7

Lors d’un travail de recherche, nous avons rencontré des agriculteurs de la zone limoneuse en Wallonie, un territoire de culture des plus productifs. Ces agriculteurs ont en commun d’avoir installé des ... [more ▼]

Lors d’un travail de recherche, nous avons rencontré des agriculteurs de la zone limoneuse en Wallonie, un territoire de culture des plus productifs. Ces agriculteurs ont en commun d’avoir installé des bandes aménagées en bordure de parcelles dans le cadre des méthodes agro-environnementales (MAEC - dispositifs de la Politique Agricole Commune visant à protéger l’environnement dans les espaces agricoles). Nous avons tenté de comprendre ce que sont et ce que pourraient devenir les bandes aménagées pour ces agriculteurs. En effet, alors que de nombreux travaux se sont intéressés aux aspects techniques, notamment à la composition et à la gestion des mélanges semés, peu d’attention a été portée aux agriculteurs et à la façon dont ils intègrent ces mélanges dans leur pratique. Nous explorons, à travers notre analyse, la possibilité d’une co-construction des MAEC avec les agriculteurs pour une action agro-environnementale pertinente aussi du point de vue de la production agricole. [less ▲]

Detailed reference viewed: 36 (4 ULiège)