Marek Wójcikowski - Publications - Bridge of Knowledge

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Year 2024
Year 2023
  • Accurate Lightweight Calibration Methods for Mobile Low-Cost Particulate Matter Sensors
    Publication

    - Year 2023

    Monitoring air pollution is a critical step towards improving public health, particularly when it comes to identifying the primary air pollutants that can have an impact on human health. Among these pollutants, particulate matter (PM) with a diameter of up to 2.5 μ m (or PM2.5) is of particular concern, making it important to continuously and accurately monitor pollution related to PM. The emergence of mobile low-cost PM sensors...

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  • Adaptive Wavelet-Based Correction of Non-Anechoic Antenna Measurements
    Publication

    - Year 2023

    Non-anechoic measurements represent an affordable alternative to evaluation of antenna performance in expensive, dedicated facilities. Due to interferences and noise from external sources of EM radiation, far-field results obtained in non-ideal conditions require additional post-processing. Conventional correction algorithms rely on manual tuning of parameters, which make them unsuitable for reliable testing of prototypes. In this...

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  • An NO2 sensor based on WO3 thin films for automotive applications in the microwave frequency range
    Publication
    • A. Paleczek
    • D. Grochala
    • K. Staszek
    • S. Gruszczyński
    • E. Maciak
    • Z. Opilski
    • P. Kałużyński
    • M. Wójcikowski
    • T. Cao
    • A. Rydosz

    - SENSORS AND ACTUATORS B-CHEMICAL - Year 2023

    A microwave system dedicated to the detection of nitrogen dioxide in the harsh environment of the Norway highways is proposed. An optimized transmission line type of sensor coated with a tungsten trioxide thin film that changes its electrical properties under NO2 gas exposure is developed. The sensors' response (S) is given in °/GHz and it is calculated based on wideband measurements. The advantage of wideband measurements in comparison...

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  • Automatic Correction of Non-Anechoic Antenna Measurements using Low-Pass Filters
    Publication

    Prototype measurements belong to key steps in the development of antenna structures. They are normally performed in expensive facilities, such as anechoic chambers (ACs). Alternatively, antenna performance can be extracted (at a low cost) in non-anechoic conditions upon appropriate post-processing. Unfortunately, existing correction algorithms are difficult to set up and prone to failure, which limits their practical usefulness....

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  • Hardware cryptography coprocessor for system on chip soft processor
    Publication

    W artykule przedstawiono realizację sprzętową i programową szyfrującejo i deszyfrującego algorytmu AES.Obydwie implementacje zostały zralizowane z wykorzystaniem układu Virtex II i przetestowane. Jako kryterium porónawcze wybrano zużycie zasobów układu oraz wydajność. Realizacja sprzętowa wykonuje operację szyfrowania 2 dekady szybcie niż wersja programowa, ale wymaga pięciokrotnie więcej zasobówIn this paper hardware and software...

  • Implementation of AES cryptography alghoritm in FPGA
    Publication

    W artykule przedstawiono porównanie dwóch realizacji algorytmu kryptograficznego AES w układzie programowalnym FPGA. W pierwszej wersji zrealizowano algorytm prosty i odwrotny łącznie z modułami sprzętowej realizacji rozwijania klucza. W drugiej wersji klucze są rozwijane programowo poprzez wbudowany procesor. Obie realizacje zostały przetestowane praktycznie na płytce prototypowej. Przedstawiono osiągnięte przepustowości jak również...

Year 2003

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