Scibor Sobieski

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Allegories are enriched categories generalizing a category of sets and binary relations. In this paper, we extend a new, recently-introduced conceptual data model based on allegories by adding support for modal operators and developing a modal interpretation of the model in any allegory satisfying certain additional (but natural) axioms. The possibility of(More)
The article describes the designing process, implementation and development of the middleclass computer project, accomplished by the students of University of Łódź. The project, which is called SUL, is a WWW-based portal with several set up purposes. Services for students ( news, emails or private web pages including secure and reliable communication(More)
The main purpose of this paper is to provide the reader with some insight into how Ethernet controller works on MPC8555E embedded platform produced by Freescale company. The paper will deal with the problems connected with Ethernet performance during power-up of computer when firmware is running on the hardware and later when FreeBSD loader works. Another(More)
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