Перегляд за автором "Zabierowski, W."

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  • Зображення мініатюри
    Публікація
    2EE in Applications Supporting Business Management
    (ХНУРЭ, 2012) Trojanowski, M.; Zabierowski, W.; Napier, A.
    The article presents an example of application, which could be used to support the work of a company that must deal with improvement and evalution of knowledge of their workers. Application provide rich client graphical interface that facilitate navigation. The core of the system is based on Spring services, which support application in business logic. On the bottom of the application is middle tier Hibernate. Thanks to this design the system is very scalable and flexible
  • Зображення мініатюри
    Публікація
    BB84 Analysis of Operation and Practical Considerations and Implementations of Quantum Key Distribution Systems
    (ХНУРЭ, 2011) Winiarczyk, P.; Zabierowski, W.
    Nowadays cryptography is applied in more and more applications. Most often asymmetric or hybrid systems are used, which are based on mathematical concepts. However, a promising family of quantum solutions tries to take over control. This article describes a technique of quantum key distribution called BB84. It gives an insight into quantum physics governing the proper operation of any system in quantum cryptography and then presents the detailed analysis of BB48 system. Its operation and security it provides are discussed. Next aspect that is covered is dedicated to practical considerations of quantum cryptography. All basic problems encountered while implementing BB84 or any other quantum system are explained.
  • Зображення мініатюри
    Публікація
    Methods of Sound Data Compression –omparison of Different Standards
    (ХНУРЭ, 2011) Nowak, N.; Zabierowski, W.
    The following article is about the methods of sound data compression. The technological progress has facilitated the process of recording audio on different media such as CD-Audio. The development of audio data compression has significantly made our lives easier. In recent years, much has been achieved in the field of audio and speech compression. Many standards have been established. They are characterized by more better sound quality at lower bitrate. It allows to record the same CD-Audio formats using "lossy" or lossless compression algorithms in order to reduce the amount of data surface area at almost noticeable difference in the quality of the recording. In order to compare methods of sound data compression I have used Adobe Audition 3.0 software and computer program of the sound compression system from manufacturers’ side. To illustrate the problem, I have used the graphs of the spectrum and musical composition spectrograms. The comparison has been done on the basis of uncompressed music track from the original CD-Audio.
  • Зображення мініатюри
    Публікація
    System for Transmitting HDTV over IP Networks Using Open-Source Software
    (ХНУРЭ, 2012) Starzak, M.; Zabierowski, W.; Napieralski, A.
    The article presents results of work in the field of transmission of standard and non-standard high definition television signals over IP networks for application in medical environment. 1An example system for realtime signal acquisition, compression and broadcast is presented. It was built from off-the-shelf computer equipment, as a part of a video consulting system for medical (cardiological) purposes. To complete the task a DirectShow filter imitating a video capture device driver for Microsoft Windows operating system has been created.