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Abstract

This paper presents the design process and the results of a novel fall detector designed and constructed at the Faculty of Electronics, Military University of Technology. High sensitivity and low false alarm rates were achieved by using four independent sensors of varying physical quantities and sophisticated methods of signal processing and data mining. The manuscript discusses the study background, hardware development, alternative algorithms used for the sensor data processing and fusion for identification of the most efficient solution and the final results from testing the Android application on smartphone. The test was performed in four 6-h sessions (two sessions with female participants at the age of 28 years, one session with male participants aged 28 years and one involving a man at the age of 49 years) and showed correct detection of all 40 simulated falls with only three false alarms. Our results confirmed the sensitivity of the proposed algorithm to be 100% with a nominal false alarm rate (one false alarm per 8 h).
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Authors and Affiliations

Bartłomiej Wójtowicz
Andrzej Dobrowolski
Kazimierz Tomczykiewicz
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Abstract

The paper attempts to place John Rawls’s social theory in an ontological frame of ideas. Józef M. Bocheński’s theory of systems was chosen to describe social reality without prejudging its role in the adequate theory. By adopting this approach the author presents several issues one by one: the characteristics of political philosophy and its relation to the ontology of social reality, Bocheński’s systems theory, the analysis of the industrial enterprise as a model example of a heterogeneous, dynamic and organic system, and Rawls’s structure of society. All this is done in terms of systems theory. The resulting outcome provides, among other things, a formal definition of Rawls’s basic social structure expressed in the language of systems theory, and it supports the thesis that the synthetic entity responsible for social functioning, such as the state, is correlated with the principles of justice as proposed by Rawls.
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Bibliography

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Authors and Affiliations

Janusz Kaczmarek
1
ORCID: ORCID

  1. Uniwersytet Łódzki, Instytut Filozofii, ul. Lindleya 3/5, 90-131 Łódź

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