“Divinités incarnées et dauphins télépathes: Ethnographie de deux dispositifs d’enchantement

in Colon, Paul-Louis (Ed.) Rencontres sensorielles : approches sociologiques et anthropologiques des sens (in press)

Semantic Annotation of GPS Traces: Activity Type Inference

in Transportation Research Record: Journal of the Transportation Research Board (in press)

Due to the rapid development of technology, larger data sets concerning activity travel behavior become available. These data sets often lack semantic interpretation. This implies that annotation in terms ... [more ▼]

Due to the rapid development of technology, larger data sets concerning activity travel behavior become available. These data sets often lack semantic interpretation. This implies that annotation in terms of activity type and transportation mode is necessary. This paper aims to infer activity types from GPS traces by developing a decision tree-based model. The model only considers activity start times and activity durations. Based on the decision tree classification, a probability distribution and a point prediction model were constructed. The probability matrix describes the probability of each activity type for each class (i.e. combination of activity start time and activity duration). In each class, the point prediction model selects the activity type that has the highest probability. Two types of data were collected in 2006 and 2007 in Flanders, Belgium, i.e. activity travel data and GPS data. The optimal classification tree constructed comprises 18 leaves. Consequently, 18 if-then rules were derived. An accuracy of 74% was achieved when training the tree. The accuracy of the model for the validation set, i.e. 72.5%, shows that overfitting is minimal. When applying the model to the test set, the accuracy was almost 76%. The models indicate the importance of time information in the semantic enrichment process. This study contributes to future data collection in that it enables researchers to directly infer activity types from activity start time and duration information obtained from GPS data. Because no location information is needed, this research can be easily and readily implemented to millions of individual agents. [less ▲]

Acquired auditory agnosia in childhood and normal sleep electroencephalography subsequently diagnosed as Landau-Kleffner syndrome: report of three cases.

in Developmental Medicine & Child Neurology (in press)

Aim We report three cases of Landau-Kleffner syndrome (LKS) in children (two females, one male) in whom diagnosis was delayed because the sleep electroencephalography (EEG) was initially normal. Method ... [more ▼]

Aim We report three cases of Landau-Kleffner syndrome (LKS) in children (two females, one male) in whom diagnosis was delayed because the sleep electroencephalography (EEG) was initially normal. Method Case histories including EEG, positron emission tomography findings, and long-term outcome were reviewed. Results Auditory agnosia occurred between the age of 2 years and 3 years 6 months, after a period of normal language development. Initial awake and sleep EEG, recorded weeks to months after the onset of language regression, during a nap period in two cases and during a full night of sleep in the third case, was normal. Repeat EEG between 2 months and 2 years later showed epileptiform discharges during wakefulness and strongly activated by sleep, with a pattern of continuous spike-waves during slow-wave sleep in two patients. Patients were diagnosed with LKS and treated with various antiepileptic regimens, including corticosteroids. One patient in whom EEG became normal on hydrocortisone is making significant recovery. The other two patients did not exhibit a sustained response to treatment and remained severely impaired. Interpretation Sleep EEG may be normal in the early phase of acquired auditory agnosia. EEG should be repeated frequently in individuals in whom a firm clinical diagnosis is made to facilitate early treatment. [less ▲]

Two new SB2 binaries with main sequence B-type pulsators in the Kepler field

in Astronomy and Astrophysics (in press)

Context: OB stars are important in the chemistry and evolution of the Universe, but the sample of targets well understood from an asteroseismological point of view is still too limited to provide feedback ... [more ▼]

Context: OB stars are important in the chemistry and evolution of the Universe, but the sample of targets well understood from an asteroseismological point of view is still too limited to provide feedback on the current evolutionary models. Our study extends this sample with two spectroscopic binary systems. AIMS. Our goal is to provide orbital solutions, fundamental parameters and abundances from disentangled high-resolution high signal-to-noise spectra, as well as to analyse and interpret the variations in the Kepler light curve of these carefully selected targets. This way we continue our efforts to map the instability strips of beta Cep and SPB stars using the combination of high-resolution ground-based spectroscopy and uninterrupted space-based photometry. Methods: We fit Keplerian orbits to radial velocities measured from selected absorption lines of high-resolution spectroscopy using synthetic composite spectra to obtain orbital solutions. We use revised masks to obtain optimal light curves from the original pixel-data from the Kepler satellite, which provided better long term stability compared to the pipeline processed light curves. We use various time-series analysis tools to explore and describe the nature of variations present in the light curve. Results: We find two eccentric double-lined spectroscopic binary systems containing a total of three main sequence B-type stars (and one F-type component) of which at least one in each system exhibits light variations. The light curve analysis (combined with spectroscopy) of the system of two B stars points towards the presence of tidally excited g modes in the primary component. We interpret the variations seen in the second system as classical g mode pulsations driven by the kappa mechanism in the B type primary, and explain the unexpected power in the p mode region as a result of nonlinear resonant mode excitation. [less ▲]

Typical response of quantum pure states

in European Physical Journal B -- Condensed Matter (in press)

Amulettes ou exercices scolaires : sur les difficultés de la catégorisation des papyrus chrétiens

in de Haro Sanchez, Magali (Ed.) Écrire la magie dans l’Antiquité – Scrivere la magia nell’Antichità. Actes du colloque international (Liège, 13-15 octobre 2011) (in press)

Les modifications du fonctionnement exécutif dans le vieillissement normal

in Psychologie Française (in press)

Il est maintenu bien reconnu que le vieillissement cognitif est associé à une diminution des capacités exécutives. Toutefois, si des déficits sont effectivement observés au sein des différentes fonctions ... [more ▼]

Il est maintenu bien reconnu que le vieillissement cognitif est associé à une diminution des capacités exécutives. Toutefois, si des déficits sont effectivement observés au sein des différentes fonctions, des dissociations entre performances préservées/altérées ont également été observées au sein de chacune. Dans cette revue de question, nous détaillerons les effets du vieillissement dans les fonctions de mise à jour, flexibilité, inhibition et coordination de tâches doubles, ainsi que les modifications au sein des réseaux cérébraux associés à ces processus. Nous discuterons également l'influence des capacités attentionnelles, des ressources en mémoire de travail et de certaines caractéristiques génétiques sur ces modifications. [less ▲]

Huy / Ben Ahin : sondage dans l'abri de "Werleu II"

in Chronique de l'Archéologie Wallonne (in press), 20

Modelling Route Choice Decisions of Car Travellers Using Combined GPS and Diary Data

in Networks & Spatial Economics (in press)

The aim of this research is to identify the relationship between activity patterns and route choice decisions. The focus is twofold: on the one hand, the relationship between the purpose of a trip and the ... [more ▼]

The aim of this research is to identify the relationship between activity patterns and route choice decisions. The focus is twofold: on the one hand, the relationship between the purpose of a trip and the road categories used for the relocation is investigated; on the other hand, the relationship between the purpose of a trip and the deviation from the shortest path is studied. The data for this study were collected in 2006 and 2007 in Flanders, the Dutch speaking and northern part of Belgium. To estimate the relationship between the primary road category travelled on and the corresponding activity-travel behaviour a multinomial logit model is developed. To estimate the relationship between the deviation from the shortest path and the corresponding activity-travel behaviour a Tobit model is developed. The results of the first model point out that route choice is a function of multiple factors, not just travel time or distance. Crucial for modelling route choices or in general for traffic assignment procedures is the conclusion that activity patterns have a clear influence on the road category primarily driven on. Particularly, it was shown that the likelihood of taking primarily through roads is highest for work trips and lowest for leisure trips. The second model shows a significant relationship between the deviation from the shortest path and the purpose of the trip. Furthermore, next to trip-related attributes (trip distance), also socio-demographic variables and geographical differences play an important role. These results certainly suggest that traffic assignment procedures should be developed that explicitly take into account an activity-based segmentation. In addition, it was shown that route choices were similar during peak and off-peak periods. This is an indication that car drivers are not necessarily utility maximizers, or that classical utility functions in the context of route choices are omitting important explanatory variables. [less ▲]

La langue qui goûte. Manger marocain(s) en Italie.

in Cahiers européens de l’imaginaires (in press), 5

Fatéma Hal, ethnologue et restauratrice marocaine, décrit la nourriture, ainsi que la parole, comme ultime possession dont on ne peut jamais se défaire. On est ce qu’on mange, où qu’on soit. Mais on peut ... [more ▼]

Fatéma Hal, ethnologue et restauratrice marocaine, décrit la nourriture, ainsi que la parole, comme ultime possession dont on ne peut jamais se défaire. On est ce qu’on mange, où qu’on soit. Mais on peut pousser l’analyse au-delà de cela, en affirmant que c’est encore à travers le goût qu’on connait l’autre. Qu’il s’agisse d’ « exotisme culinaire » (Régnier 2004) ou de ce que l’on pourrait définir comme un « cannibalisme exogène », la dégustation des cuisines ainsi dites « ethniques » est une pratique à la mode. Manger l’Autre, pour le connaître ou pour le contrôler ; se faire manger par l’Autre, pour raconter de soi ou pour satisfaire les discours sur l’intégration, témoignent du rôle complexe de la nourriture dans les rapports humains à travers les cultures. L’étude ethnographique que je présente dans cet article vise à illustrer comment certaines femmes marocaines vivant en Italie construisent un savoir culinaire commun, fait de pratiques et de saveurs mobiles, et de quelle façon ce même savoir est acteur du domaine publique. [less ▲]