Search Results - "Verhelst, D"

Output-only modal analysis using blind source separation techniques by Poncelet, F., Kerschen, G., Golinval, J.-C., Verhelst, D.

“…The present study carries out output-only modal analysis using two blind source separation (BSS) techniques, namely independent component analysis and…”
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Interferon-gamma expression and infectivity of Toxoplasma infected tissues in experimentally infected sheep in comparison with pigs by Verhelst, D., De Craeye, S., Jennes, M., Dorny, P., Goddeeris, B., Cox, E.

“…Livestock animals are a potential risk for transmission of toxoplasmosis to humans. Sheep and pigs still remain an important source because their meat is often…”
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Seroprevalence of Toxoplasma gondii in domestic sheep in Belgium by Verhelst, D., De Craeye, S., Vanrobaeys, M., Czaplicki, G., Dorny, P., Cox, E.

“…•87.4% of the tested sheep had IgG to T. gondii.•Seroprevalences in Antwerp and Wallonia are statistically lower than in other regions in Belgium.•First…”
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An enhanced GRA1–GRA7 cocktail DNA vaccine primes anti-Toxoplasma immune responses in pigs by Jongert, E, Melkebeek, V, De Craeye, S, Dewit, J, Verhelst, D, Cox, E

“…Summary The protozoan parasite Toxoplasma gondii is the causative agent of a worldwide zoonosis and high prevalencies can be found both in animals and humans…”
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Protective Th1 immune responses against chronic toxoplasmosis induced by a protein–protein vaccine combination but not by its DNA–protein counterpart by Jongert, E, Verhelst, D, Abady, M, Petersen, E, Gargano, N

“…Abstract Vaccine-induced protection against toxoplasmosis is correlated with cellular immune responses to Toxoplasma gondii , both in animals and man. The goal…”
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IFN-γ expression and infectivity of Toxoplasma infected tissues are associated with an antibody response against GRA7 in experimentally infected pigs by Verhelst, D., De Craeye, S., Dorny, P., Melkebeek, V., Goddeeris, B., Cox, E., Jongert, E.

“…Toxoplasma gondii, an obligate intracellular parasite, can be transmitted to humans via the consumption of infected meat. However, there are currently no…”
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Item calibration in incomplete testing designs by Eggen, Theo J.H.M, Verhelst, Norman D

“…This study discusses the justifiability of item parameter estimation in incomplete testing designs in item response theory. Marginal maximum likelihood (MML)…”
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An Efficient MCMC Algorithm to Sample Binary Matrices with Fixed Marginals by Verhelst, Norman D.

“…Uniform sampling of binary matrices with fixed margins is known as a difficult problem. Two classes of algorithms to sample from a distribution not too…”
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The Rasch Sampler by Verhelst, Norman D., Hatzinger, Reinhold, Mair, Patrick

“…The Rasch sampler is an efficient algorithm to sample binary matrices with given marginal sums. It is a Markov chain Monte Carlo (MCMC) algorithm. The program…”
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Profile Analysis: A Closer Look at the PISA 2000 Reading Data by Verhelst, Norman D.

“…When using IRT models in Educational Achievement Testing, the model is as a rule too simple to catch all the relevant dimensions in the test. It is argued that…”
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Individual Differences in Strategy Use on Division Problems: Mental Versus Written Computation by Hickendorff, Marian, van Putten, Cornelis M, Verhelst, Norman D, Heiser, Willem J

“…Individual differences in strategy use (choice and accuracy) were analyzed. A sample of 362 Grade 6 students solved complex division problems under 2 different…”
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Testing and modelling non-normality within the one-factor model by Molenaar, Dylan, Dolan, Conor V., Verhelst, Norman D.

“…Maximum likelihood estimation in the one‐factor model is based on the assumption of multivariate normality for the observed data. This general distributional…”
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Equivalent Linear Logistic Test Models by Bechger, Timo M, Verstralen, Huub H. F. M, Verhelst, Norma D

“…Discusses the Linear Logistic Test Model (LLTM) and demonstrates that there are many equivalent ways to specify a model. Analyzed a real data set (300…”
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Virchow–Troisier's node in a haemodialysed patient: it is not always cancer by Galloy, Anne-Cecile, Christophe, Jean-Louis, Cambier, Emmanuel, Petein, Michel, Verhelst, David

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CLUSTERING NOMINAL DATA WITH EQUIVALENT CATEGORIES by Hickendorff, Marian, Heiser, Willem J., Putten, Cornelis M. van, Verhelst, Norman D.

“…The problem considered in the present paper is how to cluster data of nominal measurement level, where the categories of the variables are equivalent (the…”
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Solution Strategies and Achievement in Dutch Complex Arithmetic: Latent Variable Modeling of Change by Hickendorff, Marian, Heiser, Willem J., van Putten, Cornelis M., Verhelst, Norman D.

“…In the Netherlands, national assessments at the end of primary school (Grade 6) show a decline of achievement on problems of complex or written arithmetic over…”
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An unusual cause of abdominal pain by Terneu, S, Verhelst, D, Thys, F, Ketelslegers, E, Hantson, P, Wittebole, X

“…A 36-year-old woman presented to the Emergency Room because of abdominal pain associated with hematuria and red blood blending to stool. On admission, the…”
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Lamivudine for the Treatment of Chronic Hepatitis B by Verhelst, D, Goffin, E

“…To the Editor: In their study of lamivudine as initial treatment for chronic hepatitis B, Dienstag and colleagues (Oct. 21 issue) 1 state that 34 (52 percent)…”
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A Dynamic Generalization of the Rasch Model by Verhelst, N. D, Glas, C. A. W

“…A model for describing dynamic processes is constructed by combining the Rasch model with the concept of structurally incomplete designs. This is accomplished…”
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Identifiability of nonlinear logistic test models by BECHGER, Timo M, VERHELST, Norman D, VERSTRALEN, Huub H. F. M

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