Piotr Sawicki

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A fleet sizing problem in a road freight transportation company with heterogeneous fleet and its own technical backup facilities is considered in the paper. The mathematical model of the decision problem is formulated in terms of multiobjective, non-linear, integer programming. The model is based on queuing theory. Three optimisation criteria that focus on(More)
Malignant neoplasms of the larynx are divided into epithelial and non-epithelial. Non-epithelial neoplasms include, among others, mesenchymal chondrosarcomas and osteosarcomas. Few cases of laryngeal osteosarcomas described in the literature were usually treated by surgery without the need to use adjuvant radio- or chemotherapy. Few authors propose the(More)
Metastases of renal clear cell carcinoma to the organs of the head are rare. Single cases show that they can appear either shortly after or many years after radical surgery. The diagnosis of this cancer is difficult because of its insidious course; therefore, it is often diagnosed too late. Late diagnosis is associated with a high risk of distant metastases(More)
The paper presents a process of technical diagnostic applied to a fleet of vehicles utilized in the delivery system of express mail. It is focused on evaluation of diagnostic capacity of particular characteristics, reduction of a set of initially selected characteristics to a minimal and satisfactory subset, recognition of a technical condition of vehicles(More)
The authors of the paper concentrate on diagnostic process applied to vehicles utilized in the delivery system of express mail. The paper is focused on evaluation of diagnostic capacity of particular characteristics, reduction of a set of primary applied characteristics to a minimal and satisfactory subset and generation of the maintenance decision rules.(More)
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