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See detailLe dépérissement de l'aulne en Wallonie (2ème partie) - Identification des symptômes et recommandations de gestion
Debruxelles, N.; Chandelier, A.; Dufays, Edwin ULg et al

in Silva Belgica (2007), 114(4), 24-29

La première partie de l’article, parue dans Silva Belgica n°3/2007, a été rédigé par les mêmes auteurs sous le titre : « Le dépérissement de l’aulne en Wallonie (1ère partie) ». Cette seconde partie ... [more ▼]

La première partie de l’article, parue dans Silva Belgica n°3/2007, a été rédigé par les mêmes auteurs sous le titre : « Le dépérissement de l’aulne en Wallonie (1ère partie) ». Cette seconde partie présente les symptômes et l’évolution du dépérissement de l’aulne, ainsi que les recommandations de gestion des cordons d’aulnes dépérissants. [less ▲]

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See detailDépérissement de nos abeilles?
Nguyen, Bach Kim ULg; Widart, Joëlle ULg; De Pauw, Edwin ULg et al

Article for general public (2007)

Detailed reference viewed: 53 (15 ULg)
See detailLe dépérissement des abeilles en Wallonie
Nguyen, Bach Kim ULg; Haubruge, Eric ULg

Article for general public (2004)

Detailed reference viewed: 24 (11 ULg)
See detailLe dépérissement des abeilles
Nguyen, Bach Kim ULg; Haubruge, Eric ULg

Conference given outside the academic context (2009)

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See detailLa dépersonnalisation, son espace, sa motricité
Gauthier, Jean-Marie ULg

in Evolution Psychiatrique (1981), 46(4), 895-907

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See detailDéphaseurs en polymères à cristaux liquides pour la coronographie
Piron, Pierre ULg

Scientific conference (2012, May 22)

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See detailDephasing in quantum chaotic transport: A semiclassical approach
Whitney, Robert S.; Jacquod, Philippe; Petitjean, Cyril ULg

in PHYSICAL REVIEW B (2008), 77(4), 045315-22

We investigate the effect of dephasing (decoherence) on quantum transport through open chaotic ballistic conductors in the semiclassical limit of small Fermi wavelength to system size ratio, lambda(F)/L ... [more ▼]

We investigate the effect of dephasing (decoherence) on quantum transport through open chaotic ballistic conductors in the semiclassical limit of small Fermi wavelength to system size ratio, lambda(F)/L < 1. We use the trajectory-based semiclassical theory to study a two-terminal chaotic dot with decoherence originating from (i) an external closed quantum chaotic environment, (ii) a classical source of noise, and (iii) a voltage probe, i.e., an additional current-conserving terminal. We focus on the pure dephasing regime, where the coupling to the external source of dephasing is so weak that it does not induce energy relaxation. In addition to the universal algebraic suppression of weak localization, we find an exponential suppression of weak localization proportional to exp[-(tau) over tilde/tau(phi)], with the dephasing rate tau(-1)(phi). The parameter (tau) over tilde depends strongly on the source of dephasing. For a voltage probe, (tau) over tilde is of order the Ehrenfest time proportional to ln[L/lambda(F)]. In contrast, for a chaotic environment or a classical source of noise, it has the correlation length xi of the coupling or noise potential replacing the Fermi wavelength lambda(F). We explicitly show that the Fano factor for shot noise is unaffected by decoherence. We connect these results to earlier works on dephasing due to electron-electron interactions and numerically confirm our findings. [less ▲]

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See detailDephasing in the semiclassical limit is system-dependent
Petitjean, Cyril ULg; Jacquod, P.; Whitney, R. S.

in JETP LETTERS (2007), 86(10), 647-651

Dephasing in open quantum chaotic systems has been investigated in the limit of large system sizes to the Fermi wavelength ratio, L/lambda F >> 1. The weak localization correction g(wl) to the conductance ... [more ▼]

Dephasing in open quantum chaotic systems has been investigated in the limit of large system sizes to the Fermi wavelength ratio, L/lambda F >> 1. The weak localization correction g(wl) to the conductance for a quantum dot coupled to (i) an external closed dot and (ii) a dephasing voltage probe is calculated in the semiclassical approximation. In addition to the universal algebraic suppression g wl proportional to (1 + tau(D)/tau(phi))(-1) with the dwell time tau(D) through the cavity and the dephasing rate, we find an exponential suppression of weak localization by a factor of proportional to exp[-(tau) over tilde/tau(phi)], where is the system-dependent parameter. In the dephasing probe model, (tau) over tilde coincides with the Ehrenfest time, (tau) over tilde proportional to ln[L/lambda(F)], for both perfectly and partially transparent dot-lead couplings. In contrast, when dephasing occurs due to the coupling to an external dot, (tau) over tilde proportional to ln[L/xi] depends on the correlation length xi of the coupling potential instead of lambda(F). [less ▲]

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See detailDEPHOSPHORIZATION OF LIMONITIC CONCENTRATE BY ROASTING, ACID LEACHING AND MAGNETIC SEPARATION
Ionkov, Krassimir ULg; Gaydardzhiev, Stoyan ULg; Corea de Araujo, Armando et al

in Holmes, M. (Ed.) Proceedings of the Iron Ore 2011 International Conference (2011, July)

The oolitic iron ore reserves in Lisakovsky, Northwest Kazakhstan represent a quite challenging deposit both from technological and from resource point of view. The difficulties in processing such type of ... [more ▼]

The oolitic iron ore reserves in Lisakovsky, Northwest Kazakhstan represent a quite challenging deposit both from technological and from resource point of view. The difficulties in processing such type of ore are connected with the extremely fine dissemination of phosphorus and gangue minerals inside the oolitic formations. The goethite crystals are cemented in their structure by aluminosilicates with quartz and other gangue minerals and dissemination is so fine that they are not separable by physical methods. The laboratory tests performed in direction of dephosphorisation have shown that the combination of alkaline roasting followed by low intensity magnetic separation and acid leaching enables the obtaining of high grade iron concentrate. The magnetic separation performed ahead of leaching has been efficient by means of buffering the high pH via washing out the soluble salts and the excess of bases and applied after leaching has facilitated the removal of secondary liberated gangue minerals in the non-magnetic fraction. As a consequence, phosphorous content has been dropped to a more acceptable for the ferrous metallurgy levels while iron grade and recovery have reached respectively 61.6 and 80.8 percent. [less ▲]

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See detailDephosphorylated-uncarboxylated Matrix Gla protein concentration is predictive of vitamin K status and is correlated with vascular calcification in a cohort of hemodialysis patients.
DELANAYE, Pierre ULg; KRZESINSKI, Jean-Marie ULg; Warling, X et al

in BMC Nephrology (2014), 15

Background: Matrix Gla protein (MGP) is known to act as a potent local inhibitor of vascular calcifications. However, in order to be active, MGP must be phosphorylated and carboxylated, with this last ... [more ▼]

Background: Matrix Gla protein (MGP) is known to act as a potent local inhibitor of vascular calcifications. However, in order to be active, MGP must be phosphorylated and carboxylated, with this last process being dependent on vitamin K. The present study focused on the inactive form of MGP (dephosphorylated and uncarboxylated: dp-ucMGP) in a population of hemodialyzed (HD) patients. Results found in subjects being treated or not with vitamin K antagonist (VKA) were compared and the relationship between dp-ucMGP levels and the vascular calcification score were assessed. Methods: One hundred sixty prevalent HD patients were enrolled into this observational cohort study, including 23 who were receiving VKA treatment. The calcification score was determined (using the Kauppila method) and dp-ucMGP levels were measured using the automated iSYS method. Results: dp-ucMGP levels were much higher in patients being treated with VKA and little overlap was found with those not being treated (5604 [3758; 7836] vs. 1939 [1419; 2841] pmol/L, p <0.0001). In multivariate analysis, treatment with VKA was the most important variable explaining variation in dp-ucMGP levels even when adjusting for all other significant variables. In the 137 untreated patients, dp-ucMGP levels were significantly (p < 0.05) associated both in the uni- and multivariate analysis with age, body mass index, plasma levels of albumin, C-reactive protein, and FGF-23, and the vascular calcification score. Conclusion: We confirmed that the concentration of dp-ucMGP was higher in HD patients being treated with VKA. We observed a significant correlation between dp-ucMGP concentration and the calcification score. Our data support the theoretical role of MGP in the development of vascular calcifications. We confirmed the potential role of the inactive form of MGP in assessing the vitamin K status of the HD patients. [less ▲]

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See detailDepicting the Missing: Prospective and Retrospective Person Memory for Age Progressed Photographs
Lampinen, James Michael; Miller, Justin T; Dehon, Hedwige ULg

in Applied Cognitive Psychology (2012), 26(2), 197-173

One approach that has been used to help recover missing children is forensic age progression. In forensic age progression, outdated photographs of missing children are aged to provide an estimate of the ... [more ▼]

One approach that has been used to help recover missing children is forensic age progression. In forensic age progression, outdated photographs of missing children are aged to provide an estimate of the current appearance of the child. We examined the effectiveness of age progressed image in the context of both prospective person memory and retrospective person memory. Memory for outdated pictures and age progressed pictures did not significantly differ. The results failed to demonstrate an advantage for age progressed pictures. [less ▲]

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See detailDépistage de la problématique alcool en médecine générale
Gosset, Christiane ULg; Filée, Dominique ULg; Dor, B et al

Conference (2002)

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See detailDépistage de la tuberculose en médecine du travail
Gosset, Christiane ULg; Prignot, J.; Toppet, M. et al

Report (1996)

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See detailDepistage des cancers du sein et du col de l'uterus: attitudes et comportements de la population feminine liegeoise
Escoyez, Bernadette; Mairiaux, Philippe ULg

in Revue Médicale de Liège (2003), 58(5), 319-26

Several surveys have shown that in Belgium the coverage of the female population for both breast and cervix cancers screening is too low and not evenly distributed in the target population. In order to ... [more ▼]

Several surveys have shown that in Belgium the coverage of the female population for both breast and cervix cancers screening is too low and not evenly distributed in the target population. In order to highlight modifiable behavioural factors about cancer screening and to know the profile of women who exhibit an inadequate preventive behaviour, a postal survey has been conducted in the city of Liege. A self-administrated questionnaire was sent to a randomised sample of 1.000 women from two age groups (25-37 and 45-57 years); 444 women returned the questionnaire (response rate: 45.4%). The results show that the responders who do not comply with the recommendations for cancer screening are more often unemployed women with a low educational level, women who have a poor perception of their health, or women who are not regularly followed by a gynaecologist. Those women have more often poor knowledge and wrong beliefs about prevention, a negative perception of the curability of a cancer detected early and of the efficacy of screening tests. In spite of an overrepresentation of women with an university degree among the responders, it was also observed that more than 1 woman out of 4 in the 25-37 years age group is not convinced of the pap smear efficacy. In view of these results, the design of screening campaigns for cancer prevention has to involve specific efforts targeted at under-privileged subgroups within the female population. [less ▲]

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See detailDepistage des neoplasies endocriniennes multiples de type 1 (NEM 1). Reflexion du Groupe d'Etude des Neoplasies Endocriniennes Multiples de type 1 (GENEM 1).
Cougard, P.; Calender, A.; Carnaille, B. et al

in Annales de Chirurgie (1995), 49(6), 500-506

The "Groupe d'Etude des Neoplasies Endocriniennes Multiples de type 1 (GENEM 1)" is a French group involved in a comprehensive multicentre study of Multiple Endocrine Neoplasia type 1 syndrome (NEM 1 ... [more ▼]

The "Groupe d'Etude des Neoplasies Endocriniennes Multiples de type 1 (GENEM 1)" is a French group involved in a comprehensive multicentre study of Multiple Endocrine Neoplasia type 1 syndrome (NEM 1). The objectives of this group are to define diagnostic and therapeutic protocols and to carry out genetic research on NEM1. The first aim of physicians is to recognize the syndrome and to determine the appropriate screening especially into two circumstances: 1 degree In case of isolated and sporadic glandular disease -i-e-parathyroid glands, endocrine pancreas, antehypophysis, adrenal glands and neuroendocrine tumors? 2 degrees In case of very high probability of NEM 1 syndrome? This paper answers these two questions, based on the analysis of the first 150 cases collected by the GENEM 1. [less ▲]

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See detailLe depistage du cancer colorectal
Piront, Patricia ULg; Louis, Edouard ULg; Belaiche, Jacques ULg et al

in Revue Médicale de Liège (2007), 62(1), 15-20

Colorectal cancer is the second leading cause of death in Northern countries and need a national screening program to reduce mortality and improve quality of life. Screening has to be cost-effective and ... [more ▼]

Colorectal cancer is the second leading cause of death in Northern countries and need a national screening program to reduce mortality and improve quality of life. Screening has to be cost-effective and acceptable for patients. Many screening tools, invasive or not, are existing and often debated: FOBT, sigmoidoscopy and complete colonoscopy. New tools are in development and have to be evaluated in current practice: virtual colonoscopy, new endoscopic technologies, DNA on faeces or proteomics with markers in serum. [less ▲]

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See detailLe depistage du cancer du col de l'uterus en Belgique: le point en 2003
Delvenne, Philippe ULg; Jacobs, Nathalie ULg; Lambert, Chantal ULg et al

in Revue Médicale de Liège (2003), 58(5), 316-8

Squamous cell cancer of the uterine cervix is associated with a high morbidity and mortality worldwide and in Belgium. Its development is related to the infection by oncogenic human papillomavirus (HPV ... [more ▼]

Squamous cell cancer of the uterine cervix is associated with a high morbidity and mortality worldwide and in Belgium. Its development is related to the infection by oncogenic human papillomavirus (HPV) types. Cervical cancer is preceded by dysplasic stages (squamous intraepithelial lesions) which can be detected by a Pap smear. The goal of this paper is to review the screening of uterine cervical cancer in Belgium. [less ▲]

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See detailDépistage et détection précoce des cancers : Pourquoi? Comment? Lesquels? Qui et où? A quel prix?
Castronovo, Vincenzo ULg

in Revue Médicale de Liège (2003), 58(5), 310-3

Cancer is fighting with cardiovascular diseases for the first place as the number one killer of humans living in industrialized countries. Several factors contribute to the high incidence of cancers. The ... [more ▼]

Cancer is fighting with cardiovascular diseases for the first place as the number one killer of humans living in industrialized countries. Several factors contribute to the high incidence of cancers. The spectacular increase in life expectancy of individuals living in these areas is certainly one of the major causes that explain the steady rise of the number of patients suffering and dying from cancer. For most cancers, when the issue is fatal, it is usually after a long morbidity period often very difficult for the patient and with heavy public health consequences. Thus, a major challenge that the health professionals are facing is the reduction of malignant disease incidence. Primary prevention would be certainly the most successful strategy. However, its implementation is of extreme difficulty. Secondary prevention, non-exclusive to the primary one, represents probably the best approach to decrease morbidity and mortality linked to these diseases. Screening and early diagnosis are the two axes of such a strategy. The first one concerns the detection of a malignant lesion in an asymptomatic patient. Early diagnosis implies to consider with attention and explore any signs or symptoms that can be easily missed by the patient or the doctor and, hence, could be the first indication of a progressing cancer. The impact of cancer screening on the mortality rate due to cancer is still the subject of intense debates, while the efficacy of early diagnosis is unanimously recognized. Still, it is cancer screening that is the center of most attentions.... [less ▲]

Detailed reference viewed: 137 (3 ULg)