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See detailMiddle Miocene climate and vegetation model reconstructions and their validation with the NECLIME database
François, Louis ULg; Henrot, Alexandra-Jane ULg; Utescher, Torsten et al

in Geophys. Res. Abstracts (2014), 16

The NECLIME database gathers data of the fossil flora recorded at many localities around the world at different times of the Miocene. François et al. (Palaeogeography, Palaeoclimatology, Palaeoecology ... [more ▼]

The NECLIME database gathers data of the fossil flora recorded at many localities around the world at different times of the Miocene. François et al. (Palaeogeography, Palaeoclimatology, Palaeoecology, 304, 359–378, 2011) have presented a new method for evaluating palaeoclimate model simulations from such fossil floras. In this method, palaeovegetation is simulated from climate model outputs, using a dynamic vegetation model. Model vegetation reconstruction is then compared to the vegetation cover indicated by the fossil flora record at the various localities, using a common classification of plant functional types (PFTs) in the data and the model. Here, we apply this method to test several published Middle Miocene climate simulations conducted with General Circulation Models of different complexity: (a) Planet Simulator, (b) FOAM-LMDZ4, (c) MPI-ESM, (d) CCSM3.0 and (4) CESM1.0. Corresponding palaeovegetation distributions are simulated with the CARAIB dynamic vegetation model, in which an upgraded vegetation classification involving 26 PFTs has been imple- mented. The NECLIME palaeoflora data from 154 localities distributed worldwide have been translated in terms of the presence/absence of these PFTs. A comparison of models and data is then undertaken globally and in selected regions of the world, using all available localities. The level of agreement varies among models, among PFTs and among regions. For instance, some models are able to produce tropical and subtropical PFTs in Europe consistently with the data, but the agreement for these PFTs may be much poorer in other parts of the world, such as in northeastern Eurasia. [less ▲]

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See detailMiddle Miocene climate and vegetation modelling with PLASIM and CARAIB
Henrot, Alexandra ULg; François, Louis ULg; Favre, Eric ULg et al

Conference (2009, April 21)

In a long-term climatic cooling trend, the Middle Miocene represents one of the last warm periods of the Neogene, culminating with the Miocene Climatic Optimum, MCO (17-15 My). Palynological studies ... [more ▼]

In a long-term climatic cooling trend, the Middle Miocene represents one of the last warm periods of the Neogene, culminating with the Miocene Climatic Optimum, MCO (17-15 My). Palynological studies suggest that the warmer climatic conditions prevailing during the MCO allowed warm forests to expand poleward of the subtropical zone, with evergreen forests proliferating in North America and Europe (Jimenez-Moreno and Suc, 2007, Palaeogeogr. Palaeoclimatol. Palaeoecol. 253: 208-225). In this work, we used the Planet Simulator (Fraedrich et al., 2005, Meteorol. Z. 14: 299-304 and 305-314), an Earth system model of intermediate complexity, to carry out several simulation experiments, where we have assessed the effects of the absence of ice on the continents, the opening of the Central American and Eastern Tethys seaways, the lowering of the topography on land and the effect of various atmospheric CO2 concentrations, in agreement with the values reported in the litterature. We then produced several vegetation distributions, using the dynamic vegetation model CARAIB (Galy et al., 2008, Quat. Sci. Rev. 27: 1396-1409), to analyse if the climatic forcings considered are sufficient to explain the expansion of warmer forest types to higher latitudes. Our results indicate that an increase of atmospheric CO2 concentration, higher than the present-day one, is necessary to allow subtropical forest types to expand poleward. This result agrees with recent paleo-atmospheric CO2 reconstruction from stomatal frequency analysis, which suggests 500 ppmv of CO2 during the MCO. However, the required warming may be due to processes not considered in our setup (e.g. full oceanic circulation or other greenhouse gases). [less ▲]

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See detailA Middle Paleolithic site with blade technology at Al Tiwayrat, Qena, Upper Egypt
Vermeersch, Pierre M.; Van Peer, Philip; Rots, Veerle ULg

in Antiquity (2005), 79(305),

Detailed reference viewed: 10 (0 ULg)
See detailThe Middle to Upper Palaeolithic transition in the North-Western European plain
Flas, Damien ULg

Scientific conference (2008)

Detailed reference viewed: 16 (1 ULg)
See detailThe Middle to Upper Paleolithic transition in Europe: current issues
Flas, Damien ULg

Scientific conference (2010)

Detailed reference viewed: 21 (1 ULg)
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See detailThe Middle-Devonian proto-ovule Runcaria heinzelinii Stockmans 1968
Gerrienne, Philippe ULg; Meyer-Berthaud, B.; Fairon-Demaret, Muriel ULg et al

Conference (2005)

Detailed reference viewed: 28 (0 ULg)
See detailLe Middle-Jazz , l'Ere des Big Bands
Sacré, Robert ULg

Conference given outside the academic context (1986)

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See detailMiddle-Upper Devonian Miospores from the Ghadamis Basin (Tunisia-Libya): systematics and stratigraphy
Loboziak, S; Streel, Maurice ULg

in Review of Palaeobotany and Palynology (1989), 58

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See detailMidsagittal Jaw Movement Analysis for the Scoring of Sleep Apneas and Hypopneas
Senny, Frédéric ULg; Destiné, Jacques ULg; Poirrier, Robert ULg

in IEEE Transactions on Biomedical Engineering (2008), 55(1), 87-95

Given the importance of the detection and classification of sleep apneas and hypopneas (SAHs) in the diagnosis and the characterization of the SAH syndrome, there is a need for a reliable noninvasive ... [more ▼]

Given the importance of the detection and classification of sleep apneas and hypopneas (SAHs) in the diagnosis and the characterization of the SAH syndrome, there is a need for a reliable noninvasive technique measuring respiratory effort. This paper proposes a new method for the scoring of SAHs based on the recording of the midsagittal jaw motion (MJM, mouth opening) and on a dedicated automatic analysis of this signal. Continuous wavelet transform is used to quantize respiratory effort from the jaw motion, to detect salient mandibular movements related to SAHs and to delineate events which are likely to contain the respiratory events. The classification of the delimited events is performed using multilayer perceptrons which were trained and tested on sleep data from 34 recordings. Compared with SAHs scored manually by an expert, the sensitivity and specificity of the detection were 86.1% and 87.4%, respectively. Moreover, the overall classification agreement in the recognition of obstructive, central, and mixed respiratory events between the manual and automatic scorings was 73.1%. The MJM signal is hence a reliable marker of respiratory effort and allows an accurate detection and classification of SAHs. [less ▲]

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See detailMidsagittal Jaw Movements as a Sleep/Wake Marker
Senny, Frédéric ULg; Destiné, Jacques ULg; Poirrier, Robert ULg

in IEEE Transactions on Biomedical Engineering (2009), 56(2), 303-309

The seriousness of the obstructive sleep apnea/hypopnea syndrome is measured by the apnea-hypopnea index (AHI), the number of sleep apneas and hypopneas over the total sleep time (TST). Cardiorespiratory ... [more ▼]

The seriousness of the obstructive sleep apnea/hypopnea syndrome is measured by the apnea-hypopnea index (AHI), the number of sleep apneas and hypopneas over the total sleep time (TST). Cardiorespiratory signals are used to detect respiratory events while the TST is usually assessed by the analysis of electroencephalogram traces in polysomnography (PSG) or wrist actigraphy trace in portable monitoring. This paper presents a sleep/wake automatic detector that relies on a wavelet-based complexity measure of the midsagittal jaw movement signal and multilayer perceptrons. In all, 63 recordings were used to train and test the method, while 38 recordings constituted an independent evaluation set for which the sensitivity, the specificity, and the global agreement of sleep recognition, respectively, reached 85.1%, 76.4%, and 82.9%, compared with the PSG data. The AHI computed automatically and only from the jaw movement analysis was significantly improved (p < 0.0001 ) when considering this sleep/wake detector. Moreover, a sensitivity of 88.6% and a specificity of 83.6% were found for the diagnosis of the sleep apnea syndrome according to a threshold of 15. Thus, the jaw movement signal is reasonably accurate in separating sleep from wake, and, in addition to its ability to score respiratory events, is a valuable signal for portable monitoring. [less ▲]

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See detailMieux "être": l'insecurité en question
Lemaître, André ULg

in Revue d'action sociale (1983), N°6

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See detailMieux comprendre et évaluer la réserve en eau des sols forestiers
Ridremont, François ULg; Degré, Aurore ULg; Claessens, Hugues ULg

in Forêt Wallonne (2012), 116

La ressource en eau constitue un des facteurs déterminants de l’adaptation de nos écosystèmes forestiers aux bouleversements climatiques annoncés. L’évaluation de la réserve en eau des sols devrait amener ... [more ▼]

La ressource en eau constitue un des facteurs déterminants de l’adaptation de nos écosystèmes forestiers aux bouleversements climatiques annoncés. L’évaluation de la réserve en eau des sols devrait amener à une meilleure perception de la vulnérabilité des stations forestières au stress hydrique et à des recommandations de gestion plus précises quant au choix des essences à implanter et aux techniques de sylviculture. Cet article introductif rappelle quelques fondamentaux concernant l’économie en eau d’un sol et la capacité des arbres à puiser l’eau stockée. [less ▲]

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See detailMieux comprendre le savoir-agir autonome - Développement et analyse d'usages d'un environnement d'apprentissage destiné aux élèves de 10 à 15 ans
Georges, François ULg

Doctoral thesis (2010)

Analyse du potentiel autonomisant d'un environnement d'apprentissage en ligne destiné aux élèves de 10 à 15 ans

Detailed reference viewed: 60 (27 ULg)
See detailmieux comprendre les modes non conventionnels d'expression politique et civique des adolescents et adolescentes. apport de la théorie de ls vulnérabilité sociétale et de la théorie de la reconnaissance
Gavray, Claire ULg

in de Bie, Maria; Roose, Rudi; vandenbroeck, Michel (Eds.) Maatchappelijk engagement: een besef van kwetsbaarheid : liber amicorum voor Nicole Vettenburg (2012)

La théorie de la vulnérabilité sociétale et de la reconnaissance trouvent confirmation dans l'analyse faite des données PIDOP portant sur l'engagement social et politique des jeunes.Ce résultat est discuté

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See detailMieux connaître la forêt privée. Appel aux propriétaires.
Rondeux, Jacques ULg; Bourland, Nils ULg

in Silva Belgica (2000), 107(1), 28-29

Dans le cadre de l'appui scientifique à l'Inventaire permanent des Ressources ligneuses de Wallonie, l'Unité de Gestion et Economie forestières (Prof. J. RONDEUX) de la Faculté universitaire des Sciences ... [more ▼]

Dans le cadre de l'appui scientifique à l'Inventaire permanent des Ressources ligneuses de Wallonie, l'Unité de Gestion et Economie forestières (Prof. J. RONDEUX) de la Faculté universitaire des Sciences agronomiques de Gembloux (FUSAGx) a été chargée de compléter l'information générale relative à la forêt privée, en particulier pour mieux identifier son degré de morcellement et l'évolution attendue de celui-ci dans un avenir proche. Ce travail est réalisé en étroite collaboration avec la Cellule Inventaire des Ressources ligneuses Wallonnes (Ir. H. LECOMTE) et bénéficie du soutien de la Société Royale Forestière de Belgique. [less ▲]

Detailed reference viewed: 13 (3 ULg)