Wyniki 1-4 spośród 4 dla zapytania: authorDesc:"Mikolaj KARPINSKI"

The security of data transmission over telecommunication networks based on advanced data encryption methods

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An analysis of the data transmission security systems currently used in telecommunication networks was conducted. The features of cipher cryptanalysis based on elliptic curves are presented, in a that case possibilities construction of hardware based on FPGA. The testing of tool allowed to estimate time, necessary for the analysis of cipher, and comparison speed of hardware and software implementation. Streszczenie. Przeprowadzono analizę systemów bezpieczeństwa transmisji danych stosowanych w sieciach telekomunikacyjnych. Przedstawiono cechy charakterystyczne krytpoanalizy szyfrów opartych na krzywych eliptycznych, w tym możliwości budowy odpowiedniego sprzętu bazowanego na FPGA. Testowanie urządzenia pozwoliło ocenić czas, potrzebny dla analizy szyfru, i porównać szybkość sprzętowej[...]

Algorithms of topology building in the Wireless Sensor Networks

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The wireless sensors networks makes possible creation of different network topologies. Such construction associations is possible between the network elements, to provide the minimum fence of force through settings. It is particular substantial, one of main queries before WSN (Wireless Sensor Network) and have a long time labor of settings, without the exchange of source of energy. Application of such building topologies algorithms which will allow on a rational manage energy is substantial consequently. Streszczenie. Bezprzewodowe sieci czujników umożliwiają tworzenie różnych topologii sieciowych. Możliwe jest takie zbudowanie połączeń pomiędzy elementami sieci aby zapewnić minimalny pobór mocy przez urządzenia. Jest to szczególnie istotne, gdyż jednym z głównych wymagań wobec WSN ([...]

Circuit with distributed resistance sensor based on the residue numerical system DOI:10.15199/48.2017.01.69

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W pracy pokazano, że wykorzystanie systemu resztkowego pozwala skutecznie określić w różny sposób zmienną skokowo rezystancję każdego z kilku połączonych szeregowo rezystorów bazując na znanej całkowitej ich rezystancji. Wybór modułów rezystancji, które dobrze spełniają warunki formy systemu resztkowego lub jego modyfikacji, znacznie upraszcza obliczenia. Podano przykłady rozwiązywania zagadnień metodą analityczną oraz tabelaryczną (Układ z rozproszonym czujnikiem rezystancyjnym oparty na liczbowym systemie resztkowym). Abstract. It has been shown that the use of residual classes allows the known total resistance effectively determine the resistance of each of several series-connected resistors. Selection of modules that satisfy the conditions of perfect form system of residue systems, greatly simplifies the calculations. Examples of solving the problem by using analytical and tabular methods. Słowa kluczowe: system numeryczny resztkowy, czujniki rezystancyjne,. Keywords: Residue numerical systems, resistance sensors. Introduction From physics course is known that the total resistance of resistors connected in series is the sum of each resistance [1]. The reverse operation with the classical approach is virtually impossible. Its solution would be an important step for the development of automated management of specialized computer systems, technological objects are characterized by specific features that preclude direct access rights. One of the main tasks is a technical diagnostic of equipment and, also, control of a distributed liquid level or pressure, and temperatures in different points and at different levels of the studied ambient medium (e.g., to control the storage and movement records - oil and gas), where for money saving a two-wire line usage is highly recommended. Such problems are particularly relevant in geophysics, petroleum, coal, metallurgy, meteorology, aerospace and other industries. An important aspect of res[...]

Mathematical model in task of recurrent laryngeal nerve identification by electrophysiological method DOI:10.15199/48.2017.12.63

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Amount of patients that had surgical operations on the cancer of thyroid or parathyroid gland in the clinics of the world increases incessantly. The most common postsurgical complication is an injury of recurrent laryngeal nerve (RLN) which is a very important problem, especially for insurance medicine. Therefore, it is relevant to apply hardware and software tools for decreasing the risk of nerve damage. Main task of mentioned tools is monitoring of area of surgical operation in the process of surgery with a purpose of identification and visualization of RLN location and in such a way to avoid its damage. On the First World Congress of Neural Monitoring in Thyroid and Parathyroid Surgery, which took place in Krakow in September 2015 [1], it has been systematized presented methods, hardware and software tools for identification of RLN location in a surgical wound. Functioning principle of such tools based on the electrophysiological method of stimulation of surgical wound tissues by a direct or alternating current and on the registration and processing of stimulation results with the purpose of identification of informative characteristics of tissue type. For development of software for these tools, it is important to use adequatic mathematical models of informative characteristics of tissue in surgical operation area. Methods, tools and mathematical models for the RLN identification are considered in papers by V. Riddell, J. Galivan, J. Basmajian, W. E. Davis [2, 3, 4, 5]. The number of hardware and software tools developed for its monitoring. It is advisable to note universal tools among them: NEUROSIGN, NIM® [6, 7]. In spite of wide range of possibilities and substantial decrease of RLN damage risk during use of these tools, their practical application is limited in first to the high cost and to the necessity of the third stage of anesthesia for patient, which is especially dangerous for life. Lately, in papers by[...]

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