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Synthesis of Generalised Threshold Gates and Multi Threshold Threshold Gates

100%

Nikodem M. , Bawiec M. A. , Biernat J.

tom Vol, 58, No. 1

49-54

This paper presents synthesis algorithms for Generalised and Multi Threshold Threshold Gates. Both algorithms can be applied to generate circuit structures for arbitrary Boolean functions. We present gate's formal models, synthesis algorithms and complexity estimations of the resulting structures.

Bezprzewodowe sieci czujników w zastosowaniach monitorowania środowiska i alarmowania o zagrożeniach

100%

Słabicki M. , Nikodem M. , Wojciechowski B. , Surmacz T.

tom vol. 2

3--9

Artykuł prezentuje aktualny stan badań realizowanych w ramach projektu badawczego „Bezprzewodowe sieci czujników w zastosowaniach monitorowania środowiska i alarmowania o zagrożeniach, zapewniające długi czas działania i dużą niezawodność”. Celem badań jest opracowanie narzędzi wspomagających ocenę parametrów oraz projektowanie takich sieci z uwzględnieniem specyfiki wykorzystywanych urządzeń i zastosowań. Artykuł prezentuje wyniki pomiarów rzeczywistych węzłów sieci i ich wpływ na tworzone modele i symulatory.

This paper reports aims and current status of a research grant „Long time operating and robust wireless sensor networks with application to environment monitoring and threat alarming”. Research focus on simulation and modeling of wireless sensor networks with application to computer aided verification and developement of large sensor networks. This article presents results of measurements taken on real-life nodes of such network and how their influence WSN model and simulation.

Frequency-multiplexed gas sensing using chirped laser molecular spectroscopy

100%

Tomaszewska D. , Jaworski P. , Nikodem M.

Opto-Electronics Review

2018

tom Vol. 26, No. 2

103--107

A method for frequency-multiplexed multi-sample gas sensing is presented. It enables measuring multiple samples placed simultaneously in the setup, without any optical or mechanical switching. Samples are measured using heterodyne detection and signal from each sensing path is encoded at different carrier frequency. Subsequently, a signal from particular sample is retrieved through heterodyne beatnote demodulation at unique frequency. This technique is particularly suitable for real-time calibration of the sensor through a sequential (or simultaneous) detection of three signals: from unknown sample, reference sample and baseline. Basic setup is demonstrated and proof-of-concept experiments are presented. Very good agreement with spectra measured using standard tunable diode absorption spectroscopy is obtained.

Directed Cooperation in Multihop Wireless Sensors Network

88%

Nikodem J. , Klempous R. , Nikodem M. , Woda M. , Chaczko Z.

tom Vol. 56, No. 1

7-11

This paper proposes a relational abstraction for Wireless Sensors Network where node can identify its neighbors around it. Because of limited radio link range only some of nodes have a direct contact with the base station and transmission is carried out in a multihop way so information is send from one node to another towards the BS. We propose a relation π that represents cooperation between nodes and takes advantages of topological properties of the network. Based on the hop-distance from the BS any node k can determine a set N<(k) that consists of nodes to which k should send messages in order to retain a data-flow direction towards the BS.