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Imponderabilia w gospodarce, czyli o istotności procesów długiego trwania (rec.: Kultura i gospodarka, Jacek Kochanowicz, Mirosława Marody [red.], Warszawa 2010)

Michał Dudek
Kultura i Społeczeństwo | 2012 | No 4
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Michał Dudek
ORCID: ORCID

Przedsiębiorczość w perspektywie koncepcji zakorzenienia działania ekonomicznego

Michał Dudek
Studia Socjologiczne | 2011 | No 4
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Authors and Affiliations

Michał Dudek
ORCID: ORCID

Toward The Three–Level Power Distance Concept: Expanding Geert Hofstede’s Power Distance Beyond Cross–Cultural Context

Mateusz Stępień Michał Dudek
Studia Socjologiczne | 2021 | No 1 | 61-87 | DOI: 10.24425/sts.2021.136279
Keywords power power distance Hofstede
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Abstract

Power distance is one of the most researched dimensions of culture in Geert Hofstede’s framework. The vast majority of scholars refer to power distance as though it were something self-evident. Despite the hundreds of studies conducted on the basis of power distance, to date no one has seriously tried to propose a reconceptualization of power distance. Against that background, this paper aims to redefine Hofstede’s concept of power distance. It focuses on formulating a sketch of the three-level concept of power distance that essentially refers to Hofstedian tradition, but is at the same time entangled in different ontological and epistemological assumptions on the social world. The proposed way of understanding power distance creates space for, among other things, a more interactionfocused study on power dynamics in various settings. It also provides the possibility of formulating completely new hypotheses concerning psychological and sociological dimensions of exercising power.
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Authors and Affiliations

Mateusz Stępień
1
ORCID: ORCID
Michał Dudek
1
ORCID: ORCID
  1. Uniwersytet Jagielloński

Thermodynamic analysis of modular high-temperature nuclear reactor coupled with the steam cycle for power generation

Michał Dudek Marek Jaszczur Zygmunt Kolenda
Archives of Thermodynamics | 2019 | vol. 40 | No 4 | 49-66 | DOI: 10.24425/ather.2019.130007
Keywords Modular high-temperature nuclear reactor HTR Rankine cycle Steam turbine
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Abstract

Consumption of energy is one of the important indicators in developing countries, but a lot of companies from the energy sector have to cope with three key challenges, namely how to reduce their impact on the environment, how to ensure the low cost of the energy production and how to improve the system overall performance? For Polish energy market, the number of challenges is greater. The growing demand for electricity and contemporary development of nuclear power technology allow today’s design, implement new solutions for high energy conversion system low unit cost for energy and fuel production. In the present paper, numerical analysis of modular high-temperature nuclear reactor coupled with the steam cycle for electricity production has been presented. The analysed system consists of three independent cycles. The first two are high-temperature nuclear reactor cycles which are equipped with two high-temperature nuclear reactors, heat exchangers, blowers, steam generators. The third cycle is a Rankine cycle which is equipped with up to four steam turbines, that operate in the heat recovery system. The analysis of such a system shows that is possible to achieve significantly greater efficiency than offered by traditional nuclear reactor technology.

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Authors and Affiliations

Michał Dudek
ORCID: ORCID
Marek Jaszczur
Zygmunt Kolenda

Numerical simulations of a simple refractive index sensor based on side-hole optical fibres

Michał Dudek Kinga.K. Köllő
Opto-Electronics Review | 2022 | 30 | 4 | e143607 | DOI: 10.24425/opelre.2022.143607
Keywords fibre optic sensor finite-difference time-domain method numerical simulations refractive index side-hole optical fibre
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Abstract

In this work the influence of the cavity parameters on optical losses of a simple intensity-based in-line refractive index sensor utilizing a micromachined side-hole fibre was studied by means of numerical simulations. To perform these simulations, the Authors used the finite-difference time-domain method. The proposed sensor setup consists of light source, micromachined optical fibre as a sensor head, and a detector which makes it low-cost and easy to build. The changes of the external refractive index can be, therefore, recovered by direct measurements of the transmitted intensity from which insertion loss values can be calculated. By changing geometry of the cavity micromachined into the side-hole optical fibre, it was possible to determine its influence on the final sensor sensitivity and measurements range. Based on the provided analysis of simulations results, a simple fibre optic sensor can be fabricated mainly for sensing external liquids refractive index for application in biochemistry or healthcare.
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Authors and Affiliations

Michał Dudek
1
ORCID: ORCID
Kinga.K. Köllő
1
  1. Institute of Applied Physics, Military University of Technology, 2 gen. S. Kaliskiego St., 00-908 Warsaw, Poland

Detector diode circuit noise measurement and power supply method selection for the fiber optic seismograph

Sławomir Niespodziany Anna T. Kurzych Michał Dudek
Opto-Electronics Review | 2021 | 29 | 2 | 71-79 | DOI: 10.24425/opelre.2021.135830
Keywords fiber optic sensor fibre optics rotational seismograph closed-loop detector diode avalanche photodiode noise spectral density
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Abstract

This paper investigates the noise levels present at various points in the FOSREM type fiber optic seismograph. The main aim of this research was to discover magnitudes of noise, introduced by various components of the analog and optical circuits of the device. First, the noise present in the electronic circuit without any optics connected is measured. Further experiments show noise levels including the detector diode not illuminated and illuminated. Additional tests were carried out to prove the necessity of analog circuitry shielding. All measurements were repeated using three powering scenarios which investigated the influence of power supply selection on noise. The results show that the electronic components provide a sufficient margin for the use of an even more precise detector diode. The total noise density of the whole device is lower than 4⋅10−7 rad/(s√Hz). The use of a dedicated Insulating Power Converter as a power supply shows possible advantages, but further experiments should be conducted to provide explicit thermic confirmation of these gains.
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Authors and Affiliations

Sławomir Niespodziany
1
ORCID: ORCID
Anna T. Kurzych
2
ORCID: ORCID
Michał Dudek
2
ORCID: ORCID
  1. Institute of Heat Engineering, Warsaw University of Technology, 21/25 Nowowiejska St., Warsaw 00-665, Poland
  2. Institute of Technical Physics, Military University of Technology, 2 gen. S. Kaliskiego St., Warsaw 00-908, Poland

A test performance of optical fibre sensors for real-time investigations of rotational seismic events: a case study in laboratory and field conditions

Leszek R. Jaroszewicz Michał Dudek Anna T. Kurzych Krzysztof P. Teisseyre
Opto-Electronics Review | 2021 | 29 | 4 | 213-219 | DOI: 10.24425/opelre.2021.140102
Keywords Sagnac effect field tests rotational seismology fibre optic seismograph rotation rate signal analysis
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Abstract

Preliminary results of laboratory and field tests of fibre optic rotational seismographs designed for rotational seismology are presented. In order to meet new directions of the research in this field, there is clearly a great need for suitable and extremely sensitive wideband sensors. The presented rotational seismographs based on the fibre optic gyroscopes show significant advantages over other sensor technologies when used in the seismological applications. Although the presented results are prepared for systems designed to record strong events expected by the so-called “engineering seismology”, the described system modification shows that it is possible to construct a device suitable for weak events monitoring expected by basic seismological research. The presented sensors are characterized, first and foremost, by a wide measuring range. They detect signals with amplitudes ranging from several dozen nrad/s up to even few rad/s and frequencies from 0.01 Hz to 100 Hz. The performed Allan variance analysis indicates the sensors main parameters: angle random walk in the range of 3 ∙ 10 −8 - 2 ∙ 10 −7 rad/s and bias instability in the range of 2 ∙ 10 −9 - 2 ∙ 10 −8 rad/s depending on the device. The results concerning the registration of rotational seismic events by the systems located in Książ Castle, Poland, as well as in the coalmine “Ignacy” in Rybnik, Poland were also presented and analysed.
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Authors and Affiliations

Leszek R. Jaroszewicz
1
ORCID: ORCID
Michał Dudek
1
ORCID: ORCID
Anna T. Kurzych
1
ORCID: ORCID
Krzysztof P. Teisseyre
2
ORCID: ORCID
  1. Institute of Applied Physics, Military University of Technology, 2 gen. S. Kaliskiego St., Warszawa, 00-908, Poland
  2. Institute of Geophysics, Polish Academy of Sciences, 64 Ks. Janusza St., Warszawa, 01-452, Poland

Towards uniformity of rotational events recording – initial data from common test engaging more than 40 sensors including a wide number of fiber-optic rotational seismometers

Anna T. Kurzych Leszek R. Jaroszewicz Michał Dudek Bartosz Sakowicz Jerzy K. Kowalski
Opto-Electronics Review | 2021 | 29 | 1 | 39-44 | DOI: 10.24425/opelre.2021.135827
Keywords seismometer optical fiber interferometer recording rotational seismology
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Abstract

Rotational seismology is one of the fastest developing fields of science nowadays with strongly recognized significance. Capability of monitoring rotational ground motions represents a crucial aspect of improving civil safety and efficiency of seismological data gathering. The correct sensing network selection is very important for reliable data acquisition. This paper presents initial data obtained during the international research study which has involved more than 40 various rotational sensors collected in one place. The key novelty of this experiment was the possibility to compare data gathered by completely different rotational sensors during artificially generated ground vibrations. Authors collected data by four interferometric optical fiber sensors, Fiber-Optic System for Rotational Events & Phenomena Monitoring (FOSREM), which are mobile rotational seismographs with a wide measuring range from 10-7 rad/s up to even few rad/s, sensitive only to the rotational component of the ground movement. Presented experimental results show that FOSREMs are competitive in rotational events recording compared with the state-of-the-art rotational sensors but their operation still should be improved.
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Authors and Affiliations

Anna T. Kurzych
1
ORCID: ORCID
Leszek R. Jaroszewicz
1
ORCID: ORCID
Michał Dudek
1
ORCID: ORCID
Bartosz Sakowicz
2
ORCID: ORCID
Jerzy K. Kowalski
3
ORCID: ORCID
  1. Institute of Technical Physics, Military University of Technology., 2 gen. S. Kaliskiego St., Warsaw 00-908, Poland
  2. Dep. of Microelectronics and Computer Science, Lodz University of Technology, 221/223 Wólczańska St., Lodz 90-924, Poland
  3. Elproma Elektronika Ltd., 13 Szymanowskiego St., Łomianki 05-092, Poland

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