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See detailEnclave volontaire, utilisation normale de la propriété et tolérance : jus est ars boni et aequi
Boufflette, Sophie ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2007)

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See detailLES ENCLOS-EXCLOS : UNE TECHNIQUE ÉPROUVÉE POUR L’ÉVALUATION ET LE MONITORING DE L’ÉQUILIBRE FORÊT-GRANDE FAUNE
Lehaire, François ULg; Morelle, Kevin ULg; Licoppe, Alain ULg et al

in Forêt Wallonne (2013), 125

During the last decades, populations of large ungulate herbivores have increased and their influence on forest vegetation have been clearly highlighted. Therefore, monitoring game pressure have become ... [more ▼]

During the last decades, populations of large ungulate herbivores have increased and their influence on forest vegetation have been clearly highlighted. Therefore, monitoring game pressure have become unavoidable for sustainable forest management. Such monitoring require a rigorous approach in order to evaluate objectively the forest-game balance. Under these conditions, the use of exclosure experiment has appeared an interesting solution. They enable to observe the ecosystem evolution due to forest-game imbalance as well as to detect any early deterioration of a situation that was initially considered acceptable. The enclosure-exclosure devices compare, on the one hand, the real environment (exclosure) fully accessible by wildlife and, secondly, a “control” fenced habitat (enclosures) inaccessible to all populations of large ungulates (e.g. wild boar, red deer, roe deer and mouflon). In 2006, enclosure-exclosure devices (4 x 4 m) were installed within forest gaps in order to monitore the understory dynamic in Wallonia. Observations were collected until 2012 and we computed a set of indicators characterizing the ecological changes due to large herbivores pressure on forest ecosystems. Such devices played a key educational role as it provide a visual comparison of two contrasted situations. Additionally, quantitative information were collected to perform further analysis (floristic survey, as well as height, number of stems and the cover of vegetation). We identified indicators of the ecological changes that responded within two years whereas other indicators required at least 4 monitoring years in order to quantify correctly herbivore pressure. Short-term indicators allow a rapid detection, but they have the disadvantage of being very sensitive to exogenous factors (climate changes, site conditions). At the opposite, medium-term indicators, such as regeneration growth, require a longer monitoring period, but they are more robust (mitigation interannual variations of environmental factors) than the short-term indicators. We evaluated the relative efficiency of various indicators using 17 enclosures distributed in two zones with contrasted deer densities. Some of the tested indicators allowed detecting significant differences between the two zones (Student's t test). In particular, among the short-term indicators we obtained significant result with the ground vegetation richness, regeneration richness, seedling density and height of Rubus fruticosus L. and Rubus idaeus L.. Among the medium-term indicators, the most relevant indicators were the average height of beech and birch, ground vegetation richness, seedling density and total cover of vegetation. [less ▲]

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See detailEnclosure-exclosure : management tools of forest-ungulates
Lehaire, François ULg

Scientific conference (2012, October 04)

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See detailEncoded haplotype data as input to ipPCA can better resolve population clustering
Chaichoompu, Kridsadakorn ULg; Pongsakorn, Wangkumhang; Anunchai, Assawamakin et al

Poster (2012, October)

Background Studies in population genetics are mainly based on the analysis of genetic variations among different populations. With the advent of advanced genotyping technology, large number of Single ... [more ▼]

Background Studies in population genetics are mainly based on the analysis of genetic variations among different populations. With the advent of advanced genotyping technology, large number of Single Nucleotide Polymorphisms (SNPs) can be used to capture the underlying population variations. Iterative pruning principal component analysis (ipPCA) is a very powerful tool to cluster subpopulations based on their SNP profiles. However, when several similar populations are considered in the analysis, differentiating these populations can become very challenging. Haplotype has been known to capture more segregation information and higher power than SNP but due to high inference complexity, this concept has not been widely used. Recently, haplotype sharing (HS) was reported as a good alternative method to evaluate variation among populations. HS interrogates the entire genotyping without estimating haplotype block, making it computational efficient, yet retaining population profile. Adopting HS technique and introducing a new haplotype encoding as the input to ipPCA to perform population clustering can yield very good outcomes. Results In this study we transformed an indigenous Thai SNP genotyping data, obtained from Pan Asian SNP consortium, into encoded haplotype profiles. The dataset include 13 indigenous populations (245 individuals) composing of approximately 54K SNPs for each individual. To do this, an encoded haplotype matrix was constructed by inferring overlapping haplotype based on sliding window approach in BEAGLE, an efficient haplotype inference tool. We fed this encoded haplotype matrix to ipPCA to cluster these individuals into sub-groups using only their genetic profiles. We compared the results obtained from standard protocol of ipPCA with the one that use the encoded haplotype matrix in terms of numbers of clustered subpopulations as well as the accuracy to correctly assign an individual to a correct subpopulation. Using the encoded haplotype matrix as input to ipPCA rendered the exact 13 subpopulations to be clustered with 99.18% of individual assignment accuracy, whereas the conventional ipPCA identified only 10 subpopulations with 93.47% of individual assignment accuracy. Conclusions Our result demonstrated the great potential of using the encoded haplotype matrix with ipPCA for population genetics studies. This new protocol can promote the clustering of individuals using only their genetic profiles. [less ▲]

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See detailLes encodeurs portables: une nouvelle voie pour l'enregistrement electronique des donnees en foret.
Rondeux, Jacques ULg; Fagot, Jean ULg

in Schweizerische Zeitschrift für Forstwesen = Journal Forestier Suisse (1984), 135(1), 27-35

Tragbare Datenregistriergeräte gleichen kleinen Rechenmaschinen; sie weisen eine grosse Speicherkapazität auf und können direkt mit einem Computer gekoppelt werden. Dieses System zur Datenerfassung ... [more ▼]

Tragbare Datenregistriergeräte gleichen kleinen Rechenmaschinen; sie weisen eine grosse Speicherkapazität auf und können direkt mit einem Computer gekoppelt werden. Dieses System zur Datenerfassung reduziert die Fehler bei der Codierung und der Kontrolle gegenüber den bisherigen Methoden. Zudem wird die Zeitspanne zwischen der Datenerfassung und der Auswertung wesentlich verkürzt. Nach unseren Erfahrungen sind die Datenregistriergeräte einfach in der Handhabung und eignen sich für zahlreiche forstliche Anwendungen. [less ▲]

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See detailEncoding Difficulty Promotes Postlearning Changes in Sleep
Schmidt, Christina ULg; Peigneux, Philippe ULg; Muto, Vincenzo ULg et al

in Journal of Neuroscience (2006), 26(35), 8976-8982

Learning-dependent increases in sleep spindle density have been reported during nocturnal sleep immediately after the learning session. Here, we investigated experience-dependent changes in daytime sleep ... [more ▼]

Learning-dependent increases in sleep spindle density have been reported during nocturnal sleep immediately after the learning session. Here, we investigated experience-dependent changes in daytime sleep EEG activity after declarative learning of unrelated word pairs. At weekly intervals, 13 young male volunteers spent three 24 h sessions in the laboratory under carefully controlled homeostatic and circadian conditions. At approximately midday, subjects performed either one of two word-pair learning tasks or a matched nonlearning control task, in a counterbalanced order. The two learning lists differed in the level of concreteness of the words used, resulting in an easier and a more difficult associative encoding condition, as confirmed by performance at immediate cued recall. Subjects were then allowed to sleep for 4 h; afterward, delayed cued recall was tested. Compared with the control condition, sleep EEG spectral activity in the low spindle frequency range and the density of low-frequency sleep spindles (11.25–13.75 Hz) were both significantly increased in the left frontal cortex after the difficult but not after the easy encoding condition. Furthermore, we found positive correlations between theseEEG changes during sleep and changes in memory performance between pre nap and post-nap recall sessions. These results indicate that, like during nocturnal sleep, daytime sleep EEG oscillations including spindle activity are modified after declarative learning of word pairs. Furthermore, we demonstrate here that the nature of the learning material is a determinant factor for sleep-related alterations after declarative learning. [less ▲]

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See detailL'encombrement des carrières libérales: causes et remèdes
Duesberg, Jules ULg

Speech (1937)

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See detailEnCOrE (Encyclopédie de Chimie Organique Electronique): an Original Way to Represent and Transfer Knowledge from Freshmen to Researchers in Organic Chemistry
Colaux, Catherine ULg; Krief, Alain

in Electronic Workshops in Computing (2003, December 03)

EnCOrE is an original proposal which is expected to allow to share and transfer knowledge in organic chemistry. The system will use MIDES a software, with a peer-to-peer architecture, which will allow to ... [more ▼]

EnCOrE is an original proposal which is expected to allow to share and transfer knowledge in organic chemistry. The system will use MIDES a software, with a peer-to-peer architecture, which will allow to set up a technological and methodological frame to allow collaborative building of knowledge in between chemists. Learning GRID's services will help for Experimental electronic laboratory "LabCOrE" as well as for predictive computational tools. [less ▲]

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See detailEnCOrE (Encyclopédie de Chimie Organique Electronique): An Original Way to Represent and Transfer Knowledge from Freshmen to Researchers in Organic Chemistry
Colaux, Catherine ULg; Krief, Alain

in Ritrovato, Pierluigi; Cerri, Stefano A.; Salerno, Saverio (Eds.) et al Towards the Learning Grid Advances in Human Learning Services (2005)

EnCOrE is an original proposal which is expected to allow the sharing and the transfer of knowledge in organic chemistry. The system will use MIDES software, whith a peer-to-peer architecture, which will ... [more ▼]

EnCOrE is an original proposal which is expected to allow the sharing and the transfer of knowledge in organic chemistry. The system will use MIDES software, whith a peer-to-peer architecture, which will allow setting up a technological and methodological frame to allow collaborative building of knowledge in between chemists. Learning Grid's services will help for Experimental Electronic Laboratory “LabCOrE” as well as for predictive computational tools. [less ▲]

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See detailEnCOrE : Encyclopédie de Chimie Organique Electronique
Colaux, Catherine ULg

Scientific conference (2007, January)

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See detailEnCOrE : Encyclopédie de Chimie Organique Electronique
Colaux, Catherine ULg; krief, Alain

Poster (2006, December)

Detailed reference viewed: 6 (0 ULg)
See detailEncore l'origine liégeoise des beguines
Kurth, Godefroid ULg

in Bulletin de la Classe des Lettres et des Sciences Morales et Politiques (1919)

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See detailEncore Ounamon 2,27
Winand, Jean ULg

in Lingua Aegyptia [= LingAeg] (2007), 15

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See detailEncore Renier de Huy
Kurth, Godefroid ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1905), 4

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See detailEncore un mot sur la définition de la latitude
Folie, François ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1894), 3e série, t. 27(1), 16-21

The author insists on the accuracy of his theory on the diurnal nutation.

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See detailEncore un pas vers la standardisation internationale du dosage d'HbA1c
Gillery; Bordas-fonfrède; Chapelle, Jean-Paul ULg et al

in Annales de Biologie Clinique (2008), 66(1), 6-8

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See detailEncres anciennes: l'encre ferro-gallique
Wymeersch, Noémie; Bouchat, Isabelle; Henry, Lauric et al

in L'analyse chimique, outil des experts (2012, October 11)

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See detailEncres anciennes: utilisation non conventionnelle d'aliments
Bouchat, Isabelle; Wymeersch, Noémie; Bchir, Brahim ULg et al

in Septième symposium du GCNAS: Vendredi 6 décembre, Louvain-La-Neuve (2013, December 06)

De tout temps l’homme utilise des pigments pour peindre. Il y a 27.000 ans déjà, près de Marseille, dans la grotte Cosquer, des fresques furent peintes par des hommes préhistoriques. Il existe deux ... [more ▼]

De tout temps l’homme utilise des pigments pour peindre. Il y a 27.000 ans déjà, près de Marseille, dans la grotte Cosquer, des fresques furent peintes par des hommes préhistoriques. Il existe deux grandes catégories de pigments et colorants: les naturels et les artificiels. La première catégories contient les pigments minéraux tels que les argiles (ocre jaune ou rouge, argile verte ou brune) mais aussi des pierres (lapis lazuli (bleu)) et les pigments organiques d’origine végétale (gaude (jaune)) ou d’origine animale (murex (pourpre). La deuxième catégorie contient les pigments et colorants artificiels issus de réactions chimiques (minium (orange)) ou bien des mi-végétaux, mi-minéraux comme les encres ferro-galliques classés dans les divers. Après avoir servi pendant plusieurs siècles, tous ces pigments ont été remplacés à la fin du XIXe par des colorants synthétiques issus de la pétrochimie, car ces derniers ont l'avantage de la reproductibilité constante des couleurs. Mais la fin programmée du pétrole suscite un regain d'intérêt pour les préparations naturelles. C'est donc très logiquement que notre laboratoire a décidé de s'intéresser au sujet et en particulier aux encres venant du jus de chou rouge et aux encres ferro-grenadiques en collaboration avec l'Abbaye de Villers-la-Ville. [less ▲]

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