Snijders’ correction of Infit and Outfit indexes with estimated ability level : an analysis with the Rasch model

in Journal of Applied Measurement (in press)

The Infit mean square W and the Outfit mean square U are commonly used person fit indexes under Rasch measurement. However, they suffer from two major weaknesses. First, their asymptotic distribution is ... [more ▼]

The Infit mean square W and the Outfit mean square U are commonly used person fit indexes under Rasch measurement. However, they suffer from two major weaknesses. First, their asymptotic distribution is usually derived by assuming that the true ability levels are known. Second, such distributions are even not clearly stated for indexes U and W. Both issues can seriously affect the selection of an appropriate cut-score for person fit identification. Snijders (2001) proposed a general approach to correct some person fit indexes when specific ability estimators are used. The purpose of this paper is to adapt this approach to U and W indexes. First, a brief sketch of the methodology and its application to U and W is proposed. Then, the corrected indexes are compared to their classical versions through a simulation study. The suggested correction yields controlled Type I errors against both conservatism and inflation, while the power to detect specific misfitting response patterns gets significantly increased. [less ▲]

Dynamics of Environmental Migration

Book published by Palgrave Macmillan (in press)

Terroir dairy : Using mobile milking robots for special quality dairy products based on site specific grazing

Poster (in press)

An option for combining grazing and automatic milking is Infield Automatic Milking, with more or less mobilie infield automatic milking systems (IAMS) which have been practiced sin 2008 in several ... [more ▼]

An option for combining grazing and automatic milking is Infield Automatic Milking, with more or less mobilie infield automatic milking systems (IAMS) which have been practiced sin 2008 in several European countries. This emerging technology can be used to harvest milk from specific areas, giving specialized dairies the possibility to market concept milk, cheese or butter. [less ▲]

Determination of chloramphenicol in honey, 1 shrimp and poultry meat with liquid chromatography-mass spectrometry. Validation of the method according to Commission Decision 2002/657/EC

in Food Analytical Methods (in press)

Chloramphenicol (CAP) is an antibiotic used for the treatment of bacterial infections in human and veterinary medicine. The use of CAP was prohibited in the European Union in 1994. Control laboratories ... [more ▼]

Chloramphenicol (CAP) is an antibiotic used for the treatment of bacterial infections in human and veterinary medicine. The use of CAP was prohibited in the European Union in 1994. Control laboratories are required to use suitably validated analytical methods to check sample compliance with the regulation. A quantitative method based on liquid chromatography coupled to isotopic dilution tandem mass spectrometry (LC–IDMS/MS) was developed for the determination of chloramphenicol in honey, shrimp and poultry meat. The experimental protocol consisted of a liquid-liquid extraction with ethyl acetate. Separation and detection were realized respectively by a 2690 Waters HPLC (Milford, MA, USA) and a Micromass Triple Quadrupole mass spectrometer (Micromass, Manchester, UK), equipped with an Electrospray source. The effects of mobile phase additives on the response of LC/ESI/MS were examined. Two different HPLC columns were tested: the X-Terra from Waters and the Alltima HP C18 HL from Alltech (Deerfield, IL, USA). A validation of the method was conducted according to the EU criteria for the analysis of chloramphenicol in foods. The decision limits (CCα) were 0.04, 0.03, 0.07 µg kg-1 and the detection capabilities (CCβ) were 0.05, 0.04, 0.08 µg kg-1 for honey, shrimp and poultry meat respectively. Those values are below the minimum required performance limit (MRPL) set at 0.3 µg kg-1 by the EU and 0.1 µg kg-1 by Belgium. Our protocol has the advantage to propose a unique extraction method working as well for honey, shrimp and poultry meat, contrary to similar published methods in which a different extraction method is used for each type of matrix. [less ▲]

L'antipsychologisme de Brentano

in Gyemant, Maria (Ed.) Psychologie et psychologisme (in press)

Variability of new bone mineral metabolism markers in patients treated with maintenance hemodialysis: implications for clinical decision making

in American Journal of Kidney Diseases (in press)

La richesse du sensible: Stumpf contre les néokantiens

in Calori, François; Foessel, Michael; Pradelle, Dominique (Eds.) De la Sensibilité: les Esthétiques de Kant (in press)

Me focalisant sur la réception de l'esthétique transcendantale de Kant en Allemagne à la fin du XIXe et au début du XXe siècle, je confronte deux lectures concurrentes du kantisme: la lecture ... [more ▼]

Me focalisant sur la réception de l'esthétique transcendantale de Kant en Allemagne à la fin du XIXe et au début du XXe siècle, je confronte deux lectures concurrentes du kantisme: la lecture "déflationiste" des néokantiens, qui aboutit à une conception appauvrie du sensible, et la lecture "inflationiste" de Stumpf, qui fait du sensible un champ richement et intrinsèquement structuré. [less ▲]

Les nouveautés du droit des marchés publics en quelques mots clés (série) : les mécanismes de liste fermée de candidats sélectionnés et de pré-qualification pour les marchés nationaux (secteur classique)

in Marchés et Contrats Publics = Overheidsopdrachten en -Overeenkomsten (in press)

Climate and Security: Evidence, Emerging Risks and a New Agenda

in Climatic Change (in press)

Host-habitat location by the parasitoid, Nasonia vitripennis Walker (Hymenoptera: Pteromalidae).

in Journal of Forensic Sciences (in press)

This study investigated the role of odorant cues used during host-habitat location by the generalist parasitoid, Nasonia vitripennis Walker. N vitripennis is a common parasitoid of Dipteran pupae found in ... [more ▼]

This study investigated the role of odorant cues used during host-habitat location by the generalist parasitoid, Nasonia vitripennis Walker. N vitripennis is a common parasitoid of Dipteran pupae found in association with decaying carrion. Behavioral assays were used to investigate the host-habitat searching behavior under different scenarios. First, we demonstrated N. vitripennis to be significantly attracted toward odorant cues associated with decaying meat. The biological activity of nine of the volatile molecules constituting the odor of decaying meat were tested on the searching behavior of parasitoid females through two complementary chemoecological approaches: electronantennography (EAG) and olfactometry bioassays. Butanoic acid and butan-1-ol elicited high olfactory responses, but no attraction was induced by these two chemicals. Behavioral assays showed that, among the VOCs tested, methyldisulfanylmethane (DMDS) was the only volatile chemical to induce attraction in N. vitripennis. [less ▲]