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See detailDetrimental effect of temperature increase on the fitness of an amphibian (Lissotriton helveticus)
Galloy, Valérie ULg; Denoël, Mathieu ULg

in Acta Oecologica: International Journal of Ecology (2010), 36(2), 179-183

Increases of global temperatures have resulted in measurable shifts in the distribution, phenology and survival of some plant and animal species. However, the mechanisms showing links between global ... [more ▼]

Increases of global temperatures have resulted in measurable shifts in the distribution, phenology and survival of some plant and animal species. However, the mechanisms showing links between global warming and biodiversity declines remain unclear. The aim of this study was to examine whether a key parameter of fitness, i.e. offspring number, could be affected by a temperature increase. To this end, we compared egg-laying traits at naturally occurring temperatures (14 °C, 18 °C and 22 °C) in palmate newts, Lissotriton helveticus. Our study suggests that water temperature increase has a negative effect on the fecundity of female newts. Females lay half as many eggs at high temperatures as they do at low temperatures, which results in a lower number of hatchlings. This study shows that global warming would affect amphibian populations. It complements other studies in pointing out that changes in phenology may not be driven only by warmer earlier temperatures but also by counter-selection during late-breeding, particularly in long-term breeders such as newts. More experimental studies should be carried out to understand the complex consequences of global warming and the proximate mechanisms of amphibian decline. [less ▲]

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See detailDétroit, récit d'enquête sauvage
Thoreau, François ULg

in Le collectif d'enquêtes politiques (Ed.) Cahiers d'enquêtes politiques. Vivre, expérimenter, raconter (2016)

Detailed reference viewed: 21 (3 ULg)
See detailDette d'extinction dans un hotspot de biodiversité: approches communauté et espèces
Piqueray, Julien ULg; Bisteau, Emmanuelle; Cristofoli, Sara et al

Conference (2009)

Detailed reference viewed: 89 (9 ULg)
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See detailDette de somme, intérêts moratoires et frais de recouvrement amiable
Biquet, Christine ULg

in Journal des Juges de Paix = Tijdschrift van de Vrederecters (2012), (5-6), 262-272

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See detailLa dette publique dans la zone euro
Artige, Lionel ULg

Conference given outside the academic context (2013)

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See detailLa dette wallonne: développements récents
Piron, Damien ULg; Bayenet, Benoît ULg

Conference (2015, March 11)

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See detailDetuning effects in the one-photon mazer
Bastin, Thierry ULg; Martin, John ULg

in Physical Review. A (2003), 67

The quantum theory of the mazer in the nonresonant case (a detuning between the cavity mode and the atomic transition frequencies is present) is described. The generalization from the resonant case is far ... [more ▼]

The quantum theory of the mazer in the nonresonant case (a detuning between the cavity mode and the atomic transition frequencies is present) is described. The generalization from the resonant case is far from being direct. Interesting effects of the mazer physics are pointed out. In particular, it is shown that the cavity may slow down or speed up the atoms according to the sign of the detuning and that the induced emission process may be completely blocked by use of a positive detuning. It is also shown that the detuning adds a potential step effect not present at resonance and that the use of positive detunings defines a well-controlled cooling mechanism. In the special case of a mesa cavity mode function, generalized expressions for the reflection and transmission coefficients have been obtained. The general properties of the induced emission probability are finally discussed in the hot, intermediate, and cold atom regimes. Comparison with the resonant case is given. [less ▲]

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See detailDetuning effects in the one-photon mazer
Martin, John ULg; Bastin, Thierry ULg

Poster (2002)

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See detailDetuning effects in the one-photon mazer
Martin, John ULg; Bastin, Thierry ULg

Poster (2002)

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See detailDetuning effects in the one-photon mazer
Bastin, Thierry ULg; Martin, John ULg

Poster (2002)

Detailed reference viewed: 1 (1 ULg)
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See detailDetuning effects in the vertical cold-atom micromaser
Martin, John ULg; Bastin, Thierry ULg

in European Physical Journal D -- Atoms, Molecules, Clusters & Optical Physics (2008), 48

The quantum theory of the cold atom micromaser including the effects of gravity is established in the general case where the cavity mode and the atomic transition frequencies are detuned.We show that ... [more ▼]

The quantum theory of the cold atom micromaser including the effects of gravity is established in the general case where the cavity mode and the atomic transition frequencies are detuned.We show that atoms which classically would not reach the interaction region are able to emit a photon inside the cavity. The system turns out to be extremely sensitive to the detuning and in particular to its sign. A method to solve the equations of motion for non resonant atom-field interaction and arbitrary cavity modes is presented. [less ▲]

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See detailDetuning effects on the mazer
Martin, John ULg; Bastin, Thierry ULg

in Physicalia Magazine (2003), 25

A short review of the theoretical studies of the cold atom micromaser (mazer) is presented. Existing models are then improved by considering more general working conditions. Especially, the mazer physics ... [more ▼]

A short review of the theoretical studies of the cold atom micromaser (mazer) is presented. Existing models are then improved by considering more general working conditions. Especially, the mazer physics is investigated in the situation where a detuning between the cavity mode and the atomic transition frequency is present. Interesting new effects are pointed out. Especially, it is shown that the cavity may slow down or speed up the atoms according to the sign of the detuning and that the induced emission process may be completely blocked by use of a positive detuning. The transmission probability of ultracold atoms through a micromaser is also studied and we generalize previous results established in the resonant case. In particular, it is shown that the velocity selection of cold atoms passing through the micromaser can be very easily tuned and enhanced using a nonresonant field inside the cavity. [less ▲]

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See detailLe Deuil de l'entre-deux-guerres. Sartre et la littérature engagée
Denis, Benoît ULg

in Van Beveren, Julien (Ed.) Littérature, langue et didactique. Hommages à Jean-Louis Dumortier (2014)

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See detailDeuil et traumatisme
Mormont, Christian ULg

in Revue Francophone du Stress et du Trauma (2009), 9(4), 218-223

Mourning and psychotrauma are distinct. Mourning is the painful and transient reaction following a loss. Psychotrauma is the psychic injury produced by the exposure to a too stressful event. A cruel loss ... [more ▼]

Mourning and psychotrauma are distinct. Mourning is the painful and transient reaction following a loss. Psychotrauma is the psychic injury produced by the exposure to a too stressful event. A cruel loss can induce psychotrauma, and critical event can result in loss and mourning. So, psychotrauma and mourning can coexist and interact. For the individual, it is also a single experience in which mourning and trauma are initially inseparable. [less ▲]

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See detailDeûs meûs al rikwîre dès p'titès bièsses nin k'nohowes d'vin lès baheûrs abôminabes dè Pole Sûd
Dauby, Patrick ULg

Conference given outside the academic context (2005)

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See detailDeuterium content of water increases depression susceptibility: the potential role of a serotonin-related mechanism.
Strekalova, Tatyana; Evans, Matthew; Chernopiatko, Anton et al

in Behavioural brain research (2015), 277

Environmental factors can significantly affect disease prevalence, including neuropsychiatric disorders such as depression. The ratio of deuterium to protium in water shows substantial geographical ... [more ▼]

Environmental factors can significantly affect disease prevalence, including neuropsychiatric disorders such as depression. The ratio of deuterium to protium in water shows substantial geographical variation, which could affect disease susceptibility. Thus the link between deuterium content of water and depression was investigated, both epidemiologically, and in a mouse model of chronic mild stress. We performed a correlation analysis between deuterium content of tap water and rates of depression in regions of the USA. Next, we used a 10-day chronic stress paradigm to test whether 2-week deuterium-depleted water treatment (91 ppm) affects depressive-like behavior and hippocampal SERT. The effect of deuterium-depletion on sleep electrophysiology was also evaluated in naive mice. There was a geographic correlation between a content of deuterium and the prevalence of depression across the USA. In the chronic stress model, depressive-like features were reduced in mice fed with deuterium-depleted water, and SERT expression was decreased in mice treated with deuterium-treated water compared with regular water. Five days of predator stress also suppressed proliferation in the dentate gyrus; this effect was attenuated in mice fed with deuterium-depleted water. Finally, in naive mice, deuterium-depleted water treatment increased EEG indices of wakefulness, and decreased duration of REM sleep, phenomena that have been shown to result from the administration of selective serotonin reuptake inhibitors (SSRI). Our data suggest that the deuterium content of water may influence the incidence of affective disorder-related pathophysiology and major depression, which might be mediated by the serotoninergic mechanisms. [less ▲]

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See detailDeutsch Belgien
Kurth, Godefroid ULg

in Deutsch-Belgien : Organ des deutschen Vereins zur Hebung und Pflege der Muttersprache im deutschredenden Belgien (1899), I

Detailed reference viewed: 24 (3 ULg)
See detailEine deutsch-belgische Grenzgeschichte seit 1815
Brüll, Christoph ULg

in Centre Charlemagne. Neues Stadtmuseum Aachen (Ed.) Mokka Türc & Marihuana. Schmuggel an der Aachener Grenze (2015)

Detailed reference viewed: 25 (0 ULg)