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  1. Article

    Open Access

    Analysis of the accessibility of selected massive open online courses (MOOCs) for users with disabilities

    The aim of this paper is to analyze the massive open online courses available on the platform “Coursera” from the perspective of their accessibility for users with disabilities. The analysis was carried out ag...

    Aleksandra Królak, Piotr Zając in Universal Access in the Information Society (2024)

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  2. No Access

    Chapter and Conference Paper

    Smart Pillcase System to Support the Elderly and the Disabled

    This paper analyzes the data concerning the elderly and the aspects of their lives that include taking medications and then proposes a device that was created in order to help elderly organize their medication...

    Michał Śniady, Aleksandra Królak in The Latest Developments and Challenges in … (2024)

  3. Article

    Open Access

    Incidence of bacterial and fungal infections in Polish pediatric patients with acute lymphoblastic leukemia during the pandemic

    The most common complications related to the treatment of childhood acute lymphoblastic leukemia (ALL) are infections. The aim of the study was to analyze the incidence and mortality rates among pediatric pati...

    Joanna Zawitkowska, Katarzyna Drabko, Monika Lejman, Adrian Kowalczyk… in Scientific Reports (2023)

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  4. No Access

    Chapter and Conference Paper

    Analysis and Comparison of Heart Rate Variability Signals Derived from PPG and ECG Sensors

    One of the methods of diagnosis and prevention of cardiovascular diseases is monitoring and analysis of heart rate variability (HRV). However, in order to accurately detect the RR intervals, the ECG signal mus...

    Aleksandra Królak, Edyta Pilecka in Biocybernetics and Biomedical Engineering … (2022)

  5. No Access

    Chapter and Conference Paper

    Analysis of Amped Heart Rate Sensor Performance Under the Influence of Various External Factors and User Characteristics

    Nowadays optical sensors in the form of wearable devices are omnipr...

    Aleksandra Królak, Julia Biskupiak in Current Trends in Biomedical Engineering a… (2020)

  6. No Access

    Chapter and Conference Paper

    Influence of Skin Tone on Efficiency of Vision-Based Heart Rate Estimation

    Non-contact methods of human heart rate (HR) facilitate medical assessment of this most important vital sign and increase patient comfort. Videoplethysmograpy (VPG) can be applied not only in healthcare units ...

    Aleksandra Królak in Recent Developments and Achievements in Bi… (2018)

  7. Article

    Open Access

    Eye-blink detection system for human–computer interaction

    A vision-based human--computer interface is presented in the paper. The interface detects voluntary eye-blinks and interprets them as control commands. The employed image processing methods include Haar-like f...

    Aleksandra Królak, Paweł Strumiłło in Universal Access in the Information Society (2012)

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  8. No Access

    Chapter and Conference Paper

    Analysis of Face Gestures for Human-Computer Interaction

    Vision-based systems become more and more popular due to increasing computation speed of the computer and quality of cheap webcams available for home users. Such systems can be implemented as human-computer in...

    Jacek Rondio, Aleksandra Królak in Hybrid Artificial Intelligent Systems (2011)

  9. No Access

    Article

    Temperature-programmed desoprtion of H2 from the surfaces of pd/support and Pd-Ag/support catalysts (support = Al2O3, SiO2)

    Thermal desorption of H2 from the surface of Pd/support and Pd-Ag/support (support = Al2O3, SiO2) catalysts has been investigated. Two wide desorption peaks can be observed for the 5% Pd/support catalyst. The pre...

    Izabela Witońska, Stanisław Karski… in Reaction Kinetics and Catalysis Letters (2008)