Piotr Tomaszewski

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Statistical fault prediction models and expert estimations are two popular methods for deciding where to focus the fault detection efforts when the fault detection budget is limited. In this paper, we present a study in which we empirically compare the accuracy of fault prediction offered by statistical prediction models with the accuracy of expert(More)
Software systems are normally developed in a number of releases. Each release usually modifies existing code. In this study we show that such modified code can be an important source of faults. Since faults are considered major cost drivers of software projects, the ability to identify fault-prone classes before they are implemented would give a chance to(More)
Fault prediction models still seem to be more popular in academia than in industry. In industry expert estimations of fault proneness are the most popular methods of deciding where to focus the fault detection efforts. In this paper we present a study in which we empirically evaluate the accuracy of fault prediction offered by statistical models as compared(More)
In the human organism 58 cytochrome P450 (CYP) isoenzymes belonging to 18 families have been described. These hemoproteins, with enzymatic activity characteristic for monooxygenases, show a broad affinity for chemically differentiated endo- or exogenous compounds, including drugs. CYP isoenzymes participate in metabolic pathways important for proper(More)
Cytochrome P450, initially perceived as a type of cell pigment, was soon identified as a hemoprotein with an enzymatic activity characteristic for monooxygenases with an affinity for differentiated endo- or exogenous substrates, including drugs. So far in the human organism 58 CYP isoenzymes belonging to 18 families have been described. Most from the CYP(More)