Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailDrivers of inorganic carbon dynamics in first-year sea ice: A model study.
Moreau, Sebastien; Vancoppenolle, Martin; Delille, Bruno ULg et al

in Journal of Geophysical Research. Oceans (2014)

Sea ice is an active source or a sink for carbon dioxide (CO2), although to what extent is not clear. Here, we analyze CO2 dynamics within sea ice using a one-dimensional halo-thermodynamic sea ice model ... [more ▼]

Sea ice is an active source or a sink for carbon dioxide (CO2), although to what extent is not clear. Here, we analyze CO2 dynamics within sea ice using a one-dimensional halo-thermodynamic sea ice model including gas physics and carbon biogeochemistry. The ice-ocean fluxes and vertical transport of total dissolved inorganic carbon (DIC) and total alkalinity (TA) are represented using fluid transport equations. [less ▲]

Detailed reference viewed: 20 (2 ULg)
Full Text
See detailDrivers on carbon dioxide emissions from the Scheldt river basin
Gypens, N; Passy, P; Garnier, J et al

Poster (2014, April 27)

Detailed reference viewed: 9 (0 ULg)
Full Text
Peer Reviewed
See detailDrivers, mechanisms and long-term variability of seasonal hypoxia on the Black Sea northwestern shelf – is there any recovery after eutrophication?
Capet, Arthur ULg; Beckers, Jean-Marie ULg; Grégoire, Marilaure ULg

in Biogeosciences (2013), 10

The Black Sea northwestern shelf (NWS) is a shallow eutrophic area in which the seasonal stratification of the water column isolates the bottom waters from the atmosphere. This prevents ventilation from ... [more ▼]

The Black Sea northwestern shelf (NWS) is a shallow eutrophic area in which the seasonal stratification of the water column isolates the bottom waters from the atmosphere. This prevents ventilation from counterbalancing the large consumption of oxygen due to respiration in the bottom waters and in the sediments, and sets the stage for the development of seasonal hypoxia. A three-dimensional (3-D) coupled physical–biogeochemical model is used to investigate the dynamics of bottom hypoxia in the Black Sea NWS, first at seasonal and then at interannual scales (1981–2009), and to differentiate its driving factors (climatic versus eutrophication). Model skills are evaluated by a quantitative comparison of the model results to 14 123 in situ oxygen measurements available in the NOAA World Ocean and the Black Sea Commission databases, using different error metrics. This validation exercise shows that the model is able to represent the seasonal and interannual variability of the oxygen concentration and of the occurrence of hypoxia, as well as the spatial distribution of oxygen-depleted waters. During the period 1981–2009, each year exhibits seasonal bottom hypoxia at the end of summer. This phenomenon essentially covers the northern part of the NWS – which receives large inputs of nutrients from the Danube, Dniester and Dnieper rivers – and extends, during the years of severe hypoxia, towards the Romanian bay of Constanta. An index H which merges the aspects of the spatial and temporal extension of the hypoxic event is proposed to quantify, for each year, the intensity of hypoxia as an environmental stressor. In order to explain the interannual variability of H and to disentangle its drivers, we analyze the long time series of model results by means of a stepwise multiple linear regression. This statistical model gives a general relationship that links the intensity of hypoxia to eutrophication and climate-related variables. A total of 82% of the interannual variability of H is explained by the combination of four predictors: the annual riverine nitrate load (N), the sea surface temperature in the month preceding stratification (Ts), the amount of semi-labile organic matter accumulated in the sediments (C) and the sea surface temperature during late summer (Tf). Partial regression indicates that the climatic impact on hypoxia is almost as important as that of eutrophication. Accumulation of organic matter in the sediments introduces an important inertia in the recovery process after eutrophication, with a typical timescale of 9.3 yr. Seasonal fluctuations and the heterogeneous spatial distribution complicate the monitoring of bottom hypoxia, leading to contradictory conclusions when the interpretation is done from different sets of data. In particular, it appears that the recovery reported in the literature after 1995 was overestimated due to the use of observations concentrated in areas and months not typically affected by hypoxia. This stresses the urgent need for a dedicated monitoring effort in the Black Sea NWS focused on the areas and months concerned by recurrent hypoxic events. [less ▲]

Detailed reference viewed: 30 (7 ULg)
Full Text
See detailLes drives fermiers, une nouvelle formule de vente
Merenne-Schoumaker, Bernadette ULg

in Distribution d'Aujourd'hui (2014), Juillet-Septembre

Short presentation of a new sales formula which is in the new agricultural producers marketing strategy

Detailed reference viewed: 12 (0 ULg)
Full Text
See detailDriving and damping mechanisms in hybrid pressure-gravity modes pulsators
Dupret, Marc-Antoine ULg; Miglio, Andrea ULg; Montalban Iglesias, Josefa ULg et al

in Journal of Physics: Conference Series (2008), 118

We study the energetic aspects of hybrid pressure-gravity modes pulsations. The case of hybrid beta Cephei-SPB pulsators is considered with special attention. In addition to the already known sensitivity ... [more ▼]

We study the energetic aspects of hybrid pressure-gravity modes pulsations. The case of hybrid beta Cephei-SPB pulsators is considered with special attention. In addition to the already known sensitivity of the driving mechanism to the heavy elements mixture (mainly the iron abundance), we show that the characteristics of the propagation and evanescent regions play also a major role, determining the extension of the stable gap in the frequency domain between the unstable low order pressure and high order gravity modes. Finally, we consider the case of hybrid delta Sct-gamma Dor pulsators. [less ▲]

Detailed reference viewed: 16 (5 ULg)
Full Text
Peer Reviewed
See detailDRIVING FACTORS OF SOIL FERTILITY IN MOUNTAIN TERRACED PADDY FIELDS OF YUANYANG (CHINA)
Colinet, Gilles ULg; Wu, Bozhi; Li, Yongmei et al

Poster (2012, July)

Detailed reference viewed: 18 (1 ULg)
Full Text
Peer Reviewed
See detailThe driving mechanism of roAp stars : effects of global metallicity
Theado, S.; Dupret, Marc-Antoine ULg; Noels-Grötsch, Arlette ULg

in Communications in Asteroseismology (2008), 157

We have investigated the influence of global metallicity on the excitation mechanism of roAp star pulsations. Our computations show that the opacity in the driving region of the roAp modes is strongly ... [more ▼]

We have investigated the influence of global metallicity on the excitation mechanism of roAp star pulsations. Our computations show that the opacity in the driving region of the roAp modes is strongly sensitive to the metal content but surprisingly the roAp theoretical instability strip is only weakly affected by metallicity changes. [less ▲]

Detailed reference viewed: 6 (1 ULg)
Full Text
Peer Reviewed
See detailThe driving mechanism of roAp stars : effects of local metallicity enhancement
Théado, S.; Dupret, Marc-Antoine ULg; Noels-Grötsch, Arlette ULg

in Communications in Asteroseismology (2009), 158

We have investigated the influence of a local metallicity enhancement on the excitation mechanism of roAp star pulsations. Our computations show that such accumulations poorly affect the position of the ... [more ▼]

We have investigated the influence of a local metallicity enhancement on the excitation mechanism of roAp star pulsations. Our computations show that such accumulations poorly affect the position of the theoretical roAp star instability strip although the opacity in the driving region of roAp modes is affected by metal accumulation. [less ▲]

Detailed reference viewed: 26 (1 ULg)
Full Text
See detailThe driving mechanism of roAp stars
Dupret, Marc-Antoine ULg; Théado, S.; Noels-Grötsch, Arlette ULg

in Journal of Physics: Conference Series (2008), 118

We analyse in detail the driving mechanism of roAp stars and present the theoretical instability strip predicted by our models with solar metallicity. A particular attention is given to the interpretation ... [more ▼]

We analyse in detail the driving mechanism of roAp stars and present the theoretical instability strip predicted by our models with solar metallicity. A particular attention is given to the interpretation of the role played by the different eigenfunctions in the stabilization of the modes at the red edge of the instability strip. The gradient of temperature in the H[SUB]I[/SUB] opacity bump appears to play a major role in this context. We also consider the particular and complex role played by the shape of the eigenfunctions (location of the nodes, ...). [less ▲]

Detailed reference viewed: 7 (3 ULg)
Full Text
See detailDroes
Verwilghen, Denis ULg

Master's dissertation (2003)

Detailed reference viewed: 14 (4 ULg)
Peer Reviewed
See detailDrogas de algunas plantas medicinales en el Sistema Dunar y de Saladar de El Saler (Valencia)
Cascales - Miñana, Borja ULg; Soriano, Pilar; Martínez-Solís, Isabel

Conference (2004, November)

Detailed reference viewed: 14 (0 ULg)
Peer Reviewed
See detailDrogas de especies representativas del ecosistema costero de El Saler (Valencia)
Cascales - Miñana, Borja ULg; Soriano, Pilar; Martínez-Solís, Isabel

Poster (2005, April)

Detailed reference viewed: 9 (0 ULg)
Full Text
Peer Reviewed
See detailDrogas y politica "integrada". Entre intencion y paso a la accion.
Lemaître, André ULg; Fincoeur, Bertrand ULg

in Cahiers de la Sécurité (2009)

Detailed reference viewed: 14 (3 ULg)
Full Text
See detailDrogue d'usage, drogue d'abus; le médecin et l'usager de drogue
Jamoulle, Marc ULg

Scientific conference (1998)

Un titre provocateur, tant il engrisaille la limite entre l'usage et l'abus, entre le médicament et la drogue, entre l'utilisateur de produits pharmaceutiques et l'usager de drogue. Et pourtant c'est bien ... [more ▼]

Un titre provocateur, tant il engrisaille la limite entre l'usage et l'abus, entre le médicament et la drogue, entre l'utilisateur de produits pharmaceutiques et l'usager de drogue. Et pourtant c'est bien des limites de la thérapeutique médicale dont il s'agit quand il faut aborder les marchés détournés des opiacés thérapeutiques (codéine), des barbituriques (Vesparax®), des benzodiazépines (Valium®, Xanax®, Rohypnol®) et bientôt peut-être des sérotoninergiques (Prozac®, Seroxat ®). L’analogie d’usage entre les médicaments prescrits pour la sphère mentale et les drogues de rue est frappante. Les médicaments prescrits par les médecins et détournés de leur usage le sont-ils sans responsabilité aucune des producteurs, prescripteurs, délivreurs et autorités sanitaires ? [less ▲]

Detailed reference viewed: 9 (0 ULg)
See detailDrogues : en parler, se former
Born, Michel ULg; Vandorme, C.

in Revue d'Action Sociale (1989), 5

Detailed reference viewed: 5 (0 ULg)
Full Text
Peer Reviewed
See detailLes drogues dites "douces": cannabis et syndrome amotivationnel
Schmits, Emilie ULg; Quertemont, Etienne ULg

in Revue Médicale de Liège (2013), 68

Detailed reference viewed: 79 (14 ULg)
See detailDrogues et Sécurité Routière en Belgique
Charlier, Corinne ULg

Conference (1997)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailDrogues et « politique intégrée ». Entre intention et passage à l’acte
Lemaître, André ULg; Fincoeur, Bertrand ULg

in Cahiers de la Sécurité (2008), 5

Cette contribution tente de mettre en lumière les paradoxes et les faux-semblants qui entourent en Belgique le débat sur la mise en place d'une politique « intégrée » en matière de drogues. Entre discours ... [more ▼]

Cette contribution tente de mettre en lumière les paradoxes et les faux-semblants qui entourent en Belgique le débat sur la mise en place d'une politique « intégrée » en matière de drogues. Entre discours et réalité, les pratiques partenariales dans le champ de la lutte contre la toxicomanie sont examinées à travers les résultats de trois récentes études menées sur le territoire belge. Quelques réflexions sont développées dans ce cadre autour des freins et obstacles à une coopération au premier abord souhaitée par l'ensemble des acteurs. Dans cette perspective, la démarche participe d'une tentative d'objectivation du subjectif. [less ▲]

Detailed reference viewed: 82 (34 ULg)
Peer Reviewed
See detailLes drogues prohibées
Lequarré, Françoise; Verjans, Pierre ULg

in Courrier Hebdomadaire du CRISP (1996), (n° 1506-1507),

Les politiques publiques vis-à-vis des produits psychotropes illustrent le va-et-vient entre une politique sécuritaire et une politique sanitaire, en fonction des produits et en fonction des époques.

Detailed reference viewed: 67 (3 ULg)
Peer Reviewed
See detailDrogues stupéfiantes et sécurité routière en Belgique
Charlier, Corinne ULg; Verstraete, A.; Maes, V. et al

in Toxicorama (1998), X

Detailed reference viewed: 12 (0 ULg)