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Experimental results obtained in a batch reactor are presented showing different fast dynamic phenomena. All measured OUR-profiles show a ‘start-up’ phase upon substrate addition. Neither the response time of the DO-electrode, the mixing characteristics in the reactor or the extracellular transport limitations could explain this behaviour. It is… (More)

- Jan De Neve, Joris Meys, Jean-Pierre Ottoy, Lieven Clement, Olivier Thas
- Bioinformatics
- 2014

MOTIVATION
Recently, De Neve et al. proposed a modification of the Wilcoxon-Mann-Whitney (WMW) test for assessing differential expression based on RT-qPCR data. Their test, referred to as the unified WMW (uWMW) test, incorporates a robust and intuitive normalization and quantifies the probability that the expression from one treatment group exceeds the… (More)

We present a semiparametric statistical model for the probabilistic index which can be defined as P .Y Y Å/, where Y and Y Å are independent random response variables associated with covariate patterns X and XÅ respectively. A link function defines the relationship between the probabilistic index and a linear predictor. Asymptotic normality of the… (More)

“Biosensors” are defined as sensors that allow the measurement and interpretation of the biological response of activated sludge to a known disturbance. The purpose of “biosensing” the activated sludge, on-line at the full-scale plant or off-line in lab-scale tests, is to obtain specific information about one or several activated sludge processes. This… (More)

- E. Deschepper, Olivier Thas, Jean-Pierre Ottoy
- Computational Statistics & Data Analysis
- 2006

An intuitively appealing lack-of-fit test to assess the adequacy of a regression model is introduced together with a graphical diagnostic tool. The graphical method itself includes a formal testing procedure, and, it is particularly useful to detect the location of lack-of-fit. The procedure is based on regional residuals, using subsets of the space of the… (More)

- Olivier Thas, Jean-Pierre Ottoy
- JAMDS
- 2002

Recently the authors have proposed tests for the one-sample and the ksample problem, and a test for independence. All three tests are based on sample space partitions, but they were originally developed in different papers. Here we give an overview of the construction of these tests, stressing the common underlying concept of “sample space partitions.”

- Jan De Neve, Olivier Thas, Jean-Pierre Ottoy, Lieven Clement
- Statistical applications in genetics and…
- 2013

Classical approaches for analyzing reverse transcription quantitative polymerase chain reaction (RT-qPCR) data commonly require normalization before assessing differential expression (DE). Normalization often has a substantial effect on the interpretation and validity of the subsequent analysis steps, but at the same time it causes a reduction in variance… (More)

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