Last 7 days
Bookmark and Share    
See detailLa Lumière ne sert pas qu’à voir ! Effet non-visuel de la lumière chez des personnes voyantes et non voyantes
Vandewalle, Gilles ULg

Conference given outside the academic context (2017)

Detailed reference viewed: 30 (1 ULg)
Full Text
Peer Reviewed
See detailA Markov Chain Monte Carlo Cellular Automata Model to Simulate Urban Growth
El Saeid Mustafa, Ahmed Mohamed ULg; Nishida, Gen; Saadi, Ismaïl ULg et al

in GEOProcessing 2017 proceedings, The Ninth International Conference on Advanced Geographic Information Systems, Applications, and Services (2017, March 25)

This paper investigates the potential of a cellular automata (CA) model based on logistic regression (logit) and Markov Chain Monte Carlo (MCMC) to simulate the dynamics of urban growth. The model ... [more ▼]

This paper investigates the potential of a cellular automata (CA) model based on logistic regression (logit) and Markov Chain Monte Carlo (MCMC) to simulate the dynamics of urban growth. The model assesses urbanization likelihood based on (i) a set of urban development driving forces (calibrated based on logit) and (ii) the land-use of neighboring cells (calibrated based on MCMC). An innovative feature of this CA model is the incorporation of MCMC to automatically calibrate the CA neighborhood transition rules. The MCMC based CA model is applied to Wallonia region (Belgium) to simulate urban growth from 1990 to 2000 using Corine Land Cover data (CLC). The outcome of logit model is evaluated by the relative operating characteristic (ROC). The simulated map of 2000 is then validated against 2000 actual map based on cell-to-cell location agreement. The model outcomes are realistic and relatively accurate confirming the effectiveness of the proposed MCMC-CA approach. [less ▲]

Detailed reference viewed: 36 (2 ULg)
Peer Reviewed
See detailBelgian heterosexuals’ attitudes towards different types of same-sex parenting
Scali, Thérèse ULg; D'Amore, Salvatore; Green, Robert-Jay

Conference (2017, March 25)

The legal situation of Belgian gay men and lesbians may be perceived as one of the best in Europe. Indeed, the Belgian Parliament has legalized marriage and parenting for same-sex couples, has enacted ... [more ▼]

The legal situation of Belgian gay men and lesbians may be perceived as one of the best in Europe. Indeed, the Belgian Parliament has legalized marriage and parenting for same-sex couples, has enacted anti-discrimination laws, and has funded several action plans to combat homophobia. More particularly, the access to parenthood is legally possible for same-sex couples through adoption, artificial insemination and in vitro fecundation. In this supportive political context, lots of same-sex-headed families exist. However, same-sex parenting is still considered as a controversial topic by some heterosexual people. Therefore, this paper aims at understanding heterosexuals’ attitudes towards the different types of same-sex parenting as well as the rationales underlying those attitudes. In Study 1, the degrees of support of 1168 heterosexual participants aged from 18 to 81 towards those types of parenting have been analysed through a self-report questionnaire. Results revealed that heterosexuals’ participants do not show the same degree of support towards the different types of same-sex parenting. In particular, adoption by lesbian and gay couples is the more accepted type of parenting, followed by artificial insemination. Then, adoption for single lesbians or gay men and surrogacy are the types of parenting that are the less supported. Then, though the content analysis of comments posted on social networks (Study 2), we highlighted the arguments in favour and against those specific types of parenting. Those results highlight that citizens’ attitudes can go from supportive to unsupportive and this could lead to some kind of discrimination towards children raised in specific forms of same-sex-headed families. This contribution highlights work’s implication for public policy and social transformation by understanding the challenges that gay and lesbian couples and their children have to face. [less ▲]

Detailed reference viewed: 32 (2 ULg)
See detailHistoire et images. Une épistémologie historienne du visuel : le cas d'Arlette Farge
Servais, Amandine ULg

Conference (2017, March 25)

Dans cet exposé, j'analyse le cas Montjean, inscrit au cœur de la pratique fargienne. Il m’intéresse particulièrement : il est révélateur tant du projet d’Arlette Farge que de sa mise en œuvre. Une ... [more ▼]

Dans cet exposé, j'analyse le cas Montjean, inscrit au cœur de la pratique fargienne. Il m’intéresse particulièrement : il est révélateur tant du projet d’Arlette Farge que de sa mise en œuvre. Une première fois appréhendé au sein d’un ouvrage – La vie fragile (Paris, Hachette, 1986) – qui annonce, en bien des lieux, la poétique de l’historienne, on le retrouve dans une étude récente qui, selon moi, condense – tout en légèreté – les outils de l’atelier fargien. J’estime, en effet, que La révolte de Mme Montjean (Paris, Albin Michel, 2016) est une sorte de manifeste qui, évidemment, ne se donne pas explicitement comme tel. Mais en la parcourant, librement, chapitre par chapitre, je montrerai que les fondamentaux de la pratique d’Arlette Farge – telle que je tente de la formaliser par le biais du paradigme visuel – y sont formulés. [less ▲]

Detailed reference viewed: 8 (1 ULg)
Full Text
Peer Reviewed
See detailInfectious diseases diagnosis and vaccination in pet rabbits : an everyday challenge
Marlier, Didier ULg

in Marlier, Didier (Ed.) Proceedings of the Third International Conference on Avian heRpetological and Exotic mammal medicine (2017, March 25)

Detailed reference viewed: 8 (2 ULg)
See detailN2O dynamics in sea ice, insights from a first time series and isotopic tools
Kotovitch, Marie ULg; Tison, Jean-Louis; Fripiat, François et al

Conference (2017, March 25)

Nitrous oxide (N2O) is a potent greenhouse gases that has a lifetime of 114 years in the atmosphere and a global warming potential 300 time higher than that of CO2. However there are still large ... [more ▼]

Nitrous oxide (N2O) is a potent greenhouse gases that has a lifetime of 114 years in the atmosphere and a global warming potential 300 time higher than that of CO2. However there are still large uncertainties and gaps in the understanding of the N2O cycle in polar oceans and particularly associated to sea ice. Sources and sinks of N2O are therefore poorly quantified. To date, only one study by Randall et al. 2012 present N2O measurements in sea ice. They pointed out that sea ice formation and melt has the potential to generate sea-air or air-sea fluxes of N2O, respectively. The main processes (except the transport processes) involved in the N2O cycle within the aquatic environment are nitrification and denitrification. Recent observations of significant nitrification in Antarctic sea ice shed a new light on nitrogen cycle within sea ice. It has been suggested that nitrification supplies up to 70% of nitrate assimilated within Antarctic spring sea ice. Corollary, production of N2O, a by-product of nitrification, can potentially be significant. Our recent studies in Antarctic land fast ice in McMurdo Sound, confirmed this suggestion, where N2O release to the atmosphere was estimated to reach 4 µmol.m-2.yr-1. But this assessment is probably an underestimation since it only accounts for dissolved N2O while a significant amount of N2O is likely to occur in the gaseous form like N2, O2 and Ar. We will then address the new tools to measure the bulk concentration of N2O (dissolved and gaseous) in sea ice, and the production of N2O by sympagic microorganisms - what process is dominant and how much N2O is produced - based on the first time series of N2O measurement in sea ice. The determination of the isotopic composition of N2O using cavity enhanced laser absorption spectroscopy technique (Off-axis ICOS) will allow us to determine the origin of these processes. [less ▲]

Detailed reference viewed: 15 (2 ULg)
Full Text
Peer Reviewed
See detailAn Affective Account of Distance Estimation Biases
Dumitru, Magdalena ULg

Conference (2017, March 25)

Dumitru and Joergensen (2016) employed a task designed to probe social attitudes to covertly investigate the magnitude estimation of digit-word expressions (e.g., ‘8 ants’). Here we employed a task ... [more ▼]

Dumitru and Joergensen (2016) employed a task designed to probe social attitudes to covertly investigate the magnitude estimation of digit-word expressions (e.g., ‘8 ants’). Here we employed a task designed to elicit affective states to gain insights into distance underestimation and boundary extension biases. [less ▲]

Detailed reference viewed: 11 (2 ULg)
See detailCorps et virtualité : Psychopathologie du sujet borderline
Englebert, Jérôme ULg

Scientific conference (2017, March 24)

Detailed reference viewed: 40 (6 ULg)
See detailThe implicit transformation of national administrative authorities in the service of supranational ‘fair trial’ rights
Van Cleynenbreugel, Pieter ULg

Scientific conference (2017, March 24)

This presentation analyses to what extent the fundamental right to a fair trial has been instrumental in shaping or modifying the structure of national competition and financial market authorities in five ... [more ▼]

This presentation analyses to what extent the fundamental right to a fair trial has been instrumental in shaping or modifying the structure of national competition and financial market authorities in five States (the United Kingdom, France, Germany, the Netherlands and Belgium). Submitting that the ECtHR and the CJEU have succeeded in imposing a limited number of administrative organisation templates on administrative authorities and uncovering the limits of that approach, it will call for a more fundamental reflection on the risks and opportunities associated with inter- and supranational courts establishing, in a bottom-up fashion, administrative organisation templates subsequently imposed on States. [less ▲]

Detailed reference viewed: 24 (1 ULg)
Full Text
Peer Reviewed
See detailAnosognosia for behavioral disorder is related to confidence for false self-related memories in Alzheimer’s disease
Mélon, Marlène; Collette, Fabienne ULg; Salmon, Eric ULg et al

Poster (2017, March 24)

Impaired self-awareness (i.e. anosognosia) and altered metacognitive monitoring in memory tasks have both been evidenced in AD. Furthermore, cognitive studies showed disrupted interaction between self and ... [more ▼]

Impaired self-awareness (i.e. anosognosia) and altered metacognitive monitoring in memory tasks have both been evidenced in AD. Furthermore, cognitive studies showed disrupted interaction between self and memory cognitive systems in AD, reducing cognitive advantages of self-related memories (i.e. decreasing self reference effect, SRE) in these patients. However, how anosognosia relates to impaired metacognitive monitoring in AD, particularly for self-related memories, is still an open question. To investigate this question, an ecological memory task based on face-name associations was administrated to 20 healthy older controls (HC) and 20 mild AD patients. The influence of self-reference at encoding was assessed on subsequent name recall and recollective experience, as well as on predictive (feeling-of-knowing, FOK) and postretrieval (judgments-of-confidence, JOC) metacognitive judgments on name recognition in all participants. Furthermore relationships between metacognitive outcomes and awareness of daily cognitive and behavioral impairment was examined in AD. Altered SRE was evidenced in name recall and recollective experience in AD. Patients also showed impaired FOK and JOC, as well as lower awareness of their daily functioning impairment (anosognosia). Nevertheless, differential effect of self on metacognitive judgment in AD and HC was only observed on JOC for false memories. Importantly, anosognosia for behavioral disorders was related to post-retrieval confidence for false recognition of self-related items in AD patients. Thus, anosognosia concerning behavioral disorder and altered post-retrieval monitoring of self-related memories appear to be related in AD. We hypothesized that impaired monitoring of personal false memories may lead AD patients to rely on distorted recent reality when providing judgment about their everyday behavioral functioning. [less ▲]

Detailed reference viewed: 31 (1 ULg)
Full Text
See detailInactivation of DNA damage repair provides additional efficacy to the treatment of thyroid cancer
Neelature Sriramareddy, Sathyanarayana ULg

Doctoral thesis (2017)

Incidence of thyroid cancer has increased steadily over the last several decades. This type of neoplasm accounts for the majority of deaths due to endocrine cancers. The most frequent form, well ... [more ▼]

Incidence of thyroid cancer has increased steadily over the last several decades. This type of neoplasm accounts for the majority of deaths due to endocrine cancers. The most frequent form, well-differentiated thyroid cancer, is characterized by disease persistence, recurrence and a lack of response to radioiodine-131. With survival rates of 9 weeks to 5 months, anaplastic thyroid cancer has very poor prognosis. To provide additional efficacy to the treatment of thyroid cancer, we investigated the mechanisms of DNA damage and repair. We found that thyroid cancer cells undergo mitosis in presence of unrepaired DNA damage. To proliferate and survive, these cells repair DNA lesions very efficiently using homologous recombination (HR) and non-homologous end joining (NHEJ). Pharmacological inhibition of these pathways significantly increases apoptosis of thyroid cancer cells. This thesis thus demonstrates that targeting DNA damage repair pathways might have therapeutic value in relapsing and advanced thyroid cancers. [less ▲]

Detailed reference viewed: 21 (4 ULg)
Full Text
See detailMonitoring Lions (Panthera leo) using Digital 3D Models of their Tracks
Marchal, Antoine ULg

Doctoral thesis (2017)

As the Earth may be entering a new human-influenced geological time, the Anthropocene, the pressure on biodiversity due to increasing human populations and activities is unprecedented. Monitoring animal ... [more ▼]

As the Earth may be entering a new human-influenced geological time, the Anthropocene, the pressure on biodiversity due to increasing human populations and activities is unprecedented. Monitoring animal populations is essential to gain demographic data and assess their viability. Because of the difficulties linked to invasive methods that involve direct observation or handling, many researchers have explored alternative approaches such as using tracks. Tracks are the material by-product of the interaction between terrestrial animals and their physical environment due to gravity. The interpretation of tracks exists since the dawn of mankind and is a crucial factor for human evolution. As an integral part of hunting, the art of tracking involves cognitive thinking that may well be part of the origin of science. However, monitoring species through their tracks is controversial due to several reasons: unreliable recording techniques limited to two-dimensions, manipulator bias, substrate variation, misidentification of the foot from which each track originates, and subjective identification of the age, sex and/or individual. The aim of this thesis was to evaluate the possibility of monitoring lions Panthera leo through digital three-dimensional (3D) models of their tracks. The first step was to assess close-range digital photogrammetry as a low-cost, rapid, practical and reliable field technique for the digital 3D modelling of lion paws, tracks and trails. A trail, that is a continuous sequence of tracks made by the same individual, reflects the morphology and kinematics of that individual. The use of traditional morphometrics enabled the extraction of variables such as distances, angles and areas from the digital 3D trails originating from individuals of known age, sex and/or identity. When comparing adult lions walking at the same gait (i.e. same kinematics), the trail variables provided sufficient information to identify the sex and individual. The digital solution permitted the extraction of more variables than the usual pace, stride and straddle. These additional variables enabled a better discrimination between the sexes and individuals. As for the paw and track morphology, traditional morphometrics conveys limited information about the geometric structure, and fails to quantify the shape variations along curves and surfaces. To overcome these drawbacks, geometric morphometrics allowed the extraction of the form (i.e. size and shape) by means of superimposed fixed landmarks, and curve- and surface-slider semi-landmarks. Using fixed landmarks, the paws and tracks presented enough shape variation to identify their position along the anteroposterior (front or hind) and mediolateral (right or left) axes. We used fixed landmarks, with and without curve- and surface-sliders, on paws and tracks from lions of known age, sex and/or identity. The identification of the age and sex from the paws, and the age, sex and individual from the tracks achieved higher accuracies when using size and shape variables together rather than independently. The information from curves and surfaces offered an advantage for the identification from the tracks but not from the paws. Due to the variation in anatomy, paw morphology and individuality in walking, tracks and trails contain information about the individual lion that created them. Recent advances in digital close-range photogrammetry and geometric morphometrics allow the recording and extraction of that information, which can then provide data to help monitor lion populations using a non-invasive approach. [less ▲]

Detailed reference viewed: 56 (3 ULg)
Peer Reviewed
See detailRecollection versus familiarity in normal aging and in mild cognitive impairment: Impact of test format
Simon, Jessica ULg; Gilsoul, Jessica ULg; SALMON, Eric ULg et al

Poster (2017, March 24)

If familiarity is better preserved than recollection in aging and in the early stage of Alzheimer's disease (Koen & Yonelinas, 2014), the experimental conditions promoting its use should be beneficial to ... [more ▼]

If familiarity is better preserved than recollection in aging and in the early stage of Alzheimer's disease (Koen & Yonelinas, 2014), the experimental conditions promoting its use should be beneficial to these populations. One condition influencing the relative contribution of recollection and familiarity during recognition is the format of the test. The aim of this study was to investigate the impact of test format on recollection and familiarity in normal aging and in MCI in two tasks where the level of performance is equalized. Seventy young participants, 70 younger-old (55-69 years old), 69 older-old (70-85 years old), and 13 MCIs were presented with forced-choice and yes/no visual recognition memory tasks with the Remember/Know/ Guess paradigm. Young participants had better recognition memory performance than younger-old, who performed better than older-old and MCIs. Recollection and familiarity declined progressively in healthy aging. In MCI, recollection was more affected than familiarity, but patients demonstrated a more liberal use of familiarity. Finally, test format did not influence strongly the results. Young people used recollection more often in the forced-choice task compared to the yes/no task. [less ▲]

Detailed reference viewed: 18 (2 ULg)
Full Text
Peer Reviewed
See detailDepression is a heterogeneous condition: A cluster-analysis approach
Wagener, Aurélie ULg; Baeyens, Céline; Van der Linden, Martial ULg et al

Poster (2017, March 24)

The heterogeneity of depression (i.e., symptomatology profiles, treatment responsiveness) is more and more evidenced. From a clinical perspective, having a clearer overview of the symptoms’ heterogeneity ... [more ▼]

The heterogeneity of depression (i.e., symptomatology profiles, treatment responsiveness) is more and more evidenced. From a clinical perspective, having a clearer overview of the symptoms’ heterogeneity of depression will help (1) to deeper understand its underlined psychological processes and (2) to tailor clinical treatments (i.e., psychological interventions and/or antidepressant medications). In order to so, an effort to determine subtypes of depression has been developed through a cluster-analysis approach. Andreasen et al. (1980) identified three clusters of depressed patients based on the Schedule for Affective Disorders and Schizophrenia; Schacht et al. (2014) evidenced five clusters based on the Hamilton Depression Rating Scale (i.e., lack of insight, sleep/sexual/somatic, typical MDD, gastrointestinal/weight loss, mild MDD); Hybels et al. (2012) found three clusters of depressive patients based on the Center for Epidemiologic Studies-Depression Scale in community seniors; and Guidi et al. (2011) found two clusters of depressives in medically ill patients based on the Structured Clinical Interview for DSM-IV (i.e., depressed somatizers, irritable/anxious depression). The current study aims at replicating and extending these previous findings in adults presenting depressive symptoms through a cluster-analysis approach. Unlike previous studies, the highlighting of the clusters will be based on the most frequently used assessment of depression, the Beck Depression Inventory-Second Edition (BDI-II). Further, the definition of the clusters will be based on the presence of the depressive symptoms rather than on their severity because symptoms’ severity on the BDI-II can be misrepresentative of the phenomenology of depressive symptoms’ clusters. A sample of 619 adults from community and mental healthcare centers has been recruited. Inclusion criteria were as follows: being a French-speaking adult aged between 18 and 60 years and presenting at least five symptoms on the BDI-II, irrespective of their severity. Data grouping was achieved through a combination of hierarchical (Ward’s method with squared Euclidian distance measurement) and nonhierarchical procedures (K-means cluster analysis), as recommended by recent theoretical trends. A six-cluster solution was evidenced: heavy sleepers (high levels of tiredness, loss of energy and increase of sleep), cognitive depressives (high levels of pessimism, past failures, guilty feelings, self-dislike and worthlessness), affective-somatic depressives (high levels of affective symptoms - loss of interest and pleasure - and somatic symptoms - increase of appetite and sleep, irritability), mild depressives (mild levels of all symptoms), sleepless depressives (high levels of decrease of sleep and tiredness), typical depressives (high levels of all symptoms). Results evidenced the heterogeneity of depressive symptoms, as six different clusters of depressive adults have been found. Two of the clusters identified in the current study are similar to two clusters identified by Schacht et al. (2014) (sleepless depressives are similar to the cluster “sleep/sexual/somatic” because their profile are highly characterized by symptoms related to insomnia and tiredness; mild depressives are similar to the cluster “mild MDD/symptoms” because their profile are characterized by low to average levels on all symptoms). The take-home message of this study is that depression is a heterogeneous condition. Consequently, it is necessary to consider this heterogeneity in order to tailor the psychological intervention. [less ▲]

Detailed reference viewed: 31 (4 ULg)