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Tytuł:
Control circuit for series active power filters based on programmable logic devices
Autorzy:
Supronowicz, H.
Olszewski, A.
Gawiński, H.
Powiązania:
https://bibliotekanauki.pl/articles/262739.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
power electronics
active power filter
power quality
Opis:
This paper describes a control circuit for the active power filters working with three-phase AC power line. It describes logic circuitries as well as laboratory test results. The control circuit was realized with programmable logic devices, fast analog-to-digital and digital-to-analog converters. Proposed system working with open-loop control, it allows significantly simplifying its logic structure. Programmable logic devices do simultaneously a few independent tasks, so a control algorithm can be performing fast, improving considerably compensation dynamic. This paper includes results of laboratory tests of the active power filter consisted of proposed control circuit and a voltage-source converter.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 2; 21-25
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Toward The Three–Level Power Distance Concept: Expanding Geert Hofstede’s Power Distance Beyond Cross–Cultural Context
Autorzy:
Stępień, Mateusz
Dudek, Michał
Powiązania:
https://bibliotekanauki.pl/articles/2076777.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power
power distance
Hofstede
Opis:
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 interaction- focused 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.
Źródło:
Studia Socjologiczne; 2021, 1; 61-87
0039-3371
Pojawia się w:
Studia Socjologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sharp power – introduction to the issue
Autorzy:
Skoneczny, Łukasz
Cacko, Bogusław
Powiązania:
https://bibliotekanauki.pl/articles/1892078.pdf
Data publikacji:
2021
Wydawca:
Agencja Bezpieczeństwa Wewnętrznego
Tematy:
state power
sharp power
soft power
hard power
smart power
information
warfare
hybrid conflict
Opis:
The aim of the article is an attempt to define the sharp power strategy, present characteristic ways of its employment and propose methods of minimizing its negative consequences for the security of the Republic of Poland. The analysis of the issues related to the types of state power (soft power, hard power, smart power) is followed by a coherent definition of sharp power formulated by the authors of the publication. The consecutive section of the article describes examples of methods of implementing the aforementioned strategy of influencing participants of international relations. Finally, the authors presented proposals for institutional and legal solutions, which are to counteract potential sharp power moves aimed at undermining the security and international position of the Republic of Poland.
Źródło:
Przegląd Bezpieczeństwa Wewnętrznego; 2021, 13, 25; 325-340
2080-1335
2720-0841
Pojawia się w:
Przegląd Bezpieczeństwa Wewnętrznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sampled Method of Active Power Filter Control. Part II
Autorzy:
Szromba, A.
Powiązania:
https://bibliotekanauki.pl/articles/262604.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
shunt active power filter
power factor
power quality
Opis:
The aim of the paper is to demonstrate how to use sampled method of control of a shunt active power filter to maintain invariable power of a supplying voltage source, even though the supplied load varies randomly. The definition by S. Fryze of load current components is used as a basis for the construction of a family of shunt active power filters. The distinctive property of these filters is maintaining non-deformed source current in every one individually considered period T. The main features of the family of filters are described in the first part of the paper, which is devoted to DC circuit. In the second part, the results are implemented to a single- and a three-phase circuit. Additionally, some new features, which may be applied only for AC circuit, are discussed in the second part. All the presented waveforms are obtained using computer simulation tools.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 1; 29-39
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sampled method of active power filter control. Part 1
Autorzy:
Szromba, A.
Powiązania:
https://bibliotekanauki.pl/articles/262771.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
shunt active power filter
power factor
power quality
Opis:
The aim of the paper is to demonstrate how to use sampled method of control of a shunt active power filter to maintain invariable power of a supplying voltage source, even though the supplied load varies randomly. The definition by S. Fryze of load current components is used as a basis for the construction of a family of shunt active power filters. The under discussion family of filters is designed to work synchronically with a time period T. The period T may be regulated in some range. The distinctive property of these filters is maintaining non-deformed source current in every one individually considered period T. Main features of the family of filters are described in the first part of the paper, which is devoted to DC circuit. Then in the second part, the results, which are obtained in DC circuit, are implemented to a single- and then to a three-phase circuit. Additionally, some new features, which may be applied only for AC circuit, are discussed in the second part. All the presented waveforms are obtained using computer simulation tools.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2005, 11, 2; 91-98
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
One phase active filter with energy storage for active power surge compensation in feed line
Autorzy:
Sowa, K.
Baszyński, M.
Piróg, S.
Powiązania:
https://bibliotekanauki.pl/articles/141248.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power quality
active power filter
power surge compensation
Opis:
The paper presents a concept of an active filter with energy storage. This solution can be used for the compensation of momentary one phase high power loads with discontinued power consumption (e.g. spot welding machines). Apart from the typical filtering capabilities, the system’s task is also the continuity of the input power from the feeder line and limiting its fluctuation. The proposed by the author’s solution can produce measurable economic benefits by reducing the rated power necessary to energize periodically operating loads and improving the indicators of electrical energy quality. The developed method of active power surges compensation enables a flexible approach to requirements concerning the rated power of the point to which the periodically operating loads with high peak current value are connected. The tests were conducted on a simulation model specially developed in Matlab & Simulink environment, proving high effectiveness of the presented solution.
Źródło:
Archives of Electrical Engineering; 2016, 65, 2; 221-234
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specific features and models of electric power consumption by household - type consumers
Autorzy:
Frąckowiak, R.
Gałan, T.
Powiązania:
https://bibliotekanauki.pl/articles/97403.pdf
Data publikacji:
2012
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
electric power consumption
power consumption
power network
electrical energy
Opis:
In the paper, the results of analysis of the load curves for the household - type consumers fed from the LV electric power network are presented. In the study, the influence of the sunset time and ambient temperature on the electric load curves has been assessed and, consequently, the specific features of the graphs for the allocated consumer groups have been defined. Also, suitable models considering the impact of the observed factors on the electrical energy consumption have been developed. Energy consumption in the tariff zones by the consumers settled according to G12 tariff has been of special interest.
Źródło:
Computer Applications in Electrical Engineering; 2012, 10; 264-274
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power Sharing Strategy for Photovoltaic based Distributed Generators Operating in Parallel
Autorzy:
Patel, U. N.
Patel, Hiren H.
Powiązania:
https://bibliotekanauki.pl/articles/136196.pdf
Data publikacji:
2016
Wydawca:
EEEIC International Barbara Leonowicz Szabłowska
Tematy:
photovoltaic
reactive power
power sharing
Opis:
In many countries, the grid-code or standards do not allow the Photovoltaic (PV) inverters to exchange reactive power with the grid. Recently, some countries have relaxed the standards. Hence, capacity of the inverters to control reactive power must be utilized. However, the reactive power that a PV inverter can supply is constrained by the maximum power that a PV array generates and changes with the environmental conditions. A reactive power sharing algorithm is proposed that not only ensures proper distribution of reactive power amongst the inverters, but also ensures that the maximum power generated by PV is supplied to the grid. In case of identical PV inverters, the algorithm operates all inverters at nearly equal apparent power leading to nearly equal percentage utilization of the inverters, thereby achieving uniform heating of the similar devices of the inverters. The algorithms are further investigated for power sharing amongst PV inverters of unequal ratings. It is highlighted that the proposed algorithm results into the least change in the utilization factor of a PV inverter, whose power changes due to the change in environmental conditions. The effectiveness of the algorithm over other algorithms in sharing power amongst inverters is displayed through MATLAB/Simulink simulations.
Źródło:
Transactions on Environment and Electrical Engineering; 2016, 1, 4; 1-9
2450-5730
Pojawia się w:
Transactions on Environment and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Currents physical components theory and p-q power theory in the control of the three-phase shunt active power filter
Autorzy:
Firlit, A.
Powiązania:
https://bibliotekanauki.pl/articles/262629.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
active power filter
power theory
p-q power theory
CPC power theory
switching compensators
electric power quality
Opis:
This paper presents the comparison among the control algorithms of a three phase, three wire shunt active power filter. The control algorithms are based on: 1) the current's physical components theory, 2) the p-q power theory. The active power filter operation under the distorted supply voltage at the point of common coupling condition is considered. The comparison concerns the aspects of: filtering current harmonics, reactive power compensation (defined in the fundamental harmonic domain), supply current balancing and dynamic performance. The results of the laboratory investigation, using the fast prototyping system dSPACE, are given in the paper. This paper confirms that the current's physical components theory allows developing the control algorithm of shunt active power filter and its practical implementation. The investigation allows the conclusion that this control algorithm enables achieving the supply system current shape close to the sinusoidal, despite shunt active power filter operation under the distorted supply voltage. A sinusoidal supply current cannot be attained by the control algorithm based on the p-q power theory without some additional control elements, such as: PLL, signal filters, etc. The experiment also has shown that the control algorithm based on the p-q power theory is easier to implement and less demanding in terms of hardware than the control algorithm based on the current's physical components theory.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2007, 13, 1; 59-66
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of the SSC as reactive power compensator
Autorzy:
Delfino, F.
Procopio, R.
Powiązania:
https://bibliotekanauki.pl/articles/262564.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
power quality
custom power
DC-AC power conversion
reactive power
Static Series Kompensator (SSC)
Opis:
The paper deals with the possibility of employing the Custom Power Static Series Compensator (SSC), whose primary aim is to compensate voltage sags, also as a Reactive Power Compensator. The idea arises from the observation that such device does not work for the majority of time and can therefore be usefully employed for other purposes, such as power factor corrections. To this aim, an "ad hoc" control algorithm is developed and thoroughly discussed in the paper. The effectiveness of such control scheme is then tested by applying the SSC to a load represented by an induction motor in order to improve its power factor. The whole system is modelled with the aid of the electromagnetic code PSCAD -EM TDC, which allows to describe with high detail all its components. The results of the simulations show the good response of the device, which enables to rapidly increase the power factor of the motor and maintains the Total Harmonic Distortion (THD ) of the injected phase voltages under the threshold value of 8%, as prescribed by CEI EN 50160 3.11.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2007, 13, 2; 39-47
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shunt power electronic buffer as active filter and energy flow controller
Autorzy:
Szromba, A.
Powiązania:
https://bibliotekanauki.pl/articles/141224.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
active power filter
active current
power control
power quality
Opis:
The considered shunt active power filter can be controlled not only to compensate non-active current in the supply source, but additionally to optimize energy flow between the source and the load. In such a case the filter shapes the source current to be active and simultaneously regulates its magnitude. The presented filter/buffer can operate properly even when the load contains AC or DC variable energy source of any characteristic. The device can optimize energy flow for a single load, but also for a group of loads as well. The distinctive feature of the employed control method of the filter/buffer is that certain changes of energy stored in the device are utilized as the source of information concerning the active current of the load. This control method is very flexible and can be implemented to nearly all structures of active filters, for DC, single- and multiphase circuits.
Źródło:
Archives of Electrical Engineering; 2013, 62, 1; 55-75
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power electronic systems as a crucial part of Smart Grid infrastructure - a survey
Autorzy:
Benysek, G.
Kaźmierkowski, M.
Popczyk, J.
Strzelecki, R.
Powiązania:
https://bibliotekanauki.pl/articles/200105.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power electronics
smart grid
converter
power control
power conditioning
Opis:
This article gives a tutorial overview of the most important issues related to the use of power electronic systems in power engineering, with respect to the urgent need for modernization of existing grids in the direction of intelligent networks. The main problems and conditions bound up with the construction of Smart Grids and the location, as well as functioning in them of the most important power electronic systems are presented here. Special attention is directed therein to the potential possibilities of so-called ‘smart’ transformers and V2G and V2H technologies.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 455-473
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Case of Hidden Instantaneous Powers
Autorzy:
Balci, M. E.
Emanuel, A. E.
Powiązania:
https://bibliotekanauki.pl/articles/262606.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
harmonics
power definitions
power factor
Opis:
This brief communication addresses the case of a dc nonlinear load supplied with a perfectly constant instantaneous power. A careful analysis shows that this condition does not provide optimum transfer of electric energy .
Źródło:
Electrical Power Quality and Utilisation. Journal; 2008, 14, 2; 3-5
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of objects based on metric images as an effective diagnostic tool used in power engineering
Autorzy:
Gasz, R.
Powiązania:
https://bibliotekanauki.pl/articles/377230.pdf
Data publikacji:
2013
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
electric power lines
power engineering
Opis:
The paper presents the method for semi-automatic diagnostics of support structures for high voltage lines with use of metrical photographs. Diagnostics of electric power lines is an important component of their operation and consists of determination which components of the support structures need repairs or maintenance. However, it is a very time-consuming and usually really expensive process. Therefore this paper discloses the method that may make it easier to determine current technical condition of poles since it consists in comparison of real photos against virtual patterns that are developed on the basis of 3D models worked out from technical documentation. The proposed method makes it possible to analyze data that have been collected beforehand or can be applied online to carry out real-time investigations. However, application of the method in the on-line mode would enable much faster selection of poles for further assessment of them.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 74; 87-94
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Investigations of the Upqc Arrangement
Autorzy:
Benysek, G.
Powiązania:
https://bibliotekanauki.pl/articles/262602.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
power quality
power flow control
harmonics compensation
reactive power compensation
Opis:
This paper presents the fundamental properties and dependences describing the UPQC (Unified Power Quality Conditioner) arrangements. The UPQC devices simultaneously permit to fulfill the following functions: voltage and current harmonics compensation, network voltage and load current symmetrization as well as network voltage stabilization and power flow control. The selected results of the experimental investigations conducted on the small power laboratory model have been described. Applied method for DC link capacity selection was talked over in details and confirmed with experimental results. Results of experimental investigations, including operation of the UPQC arrangement in case of thyristor rectifier load were also introduced.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 1; 27-34
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy consumed by valves in conventional water systems and the application of a power-decentralization system
Autorzy:
Fu, Y.
Cai, Y.
Zhang, Z.
Wu, K.
Powiązania:
https://bibliotekanauki.pl/articles/1955328.pdf
Data publikacji:
2006
Wydawca:
Politechnika Gdańska
Tematy:
power-centralized system
power-decentralized system
valves' power consumption
valve
Opis:
The power consumption by valves of a conventional (i.e. power-centralized) water system is analyzed on the example of a water heating system in order to evaluate the extent of energy savings achievable in a power-decentralized system. The configuration and appli-cation of a power-decentralized system is briefly discussed.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2006, 10, 3; 311-320
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of transient states in the start-up path during voltage and start-up power application
Autorzy:
Grządzielski, Ireneusz
Olejnik, Bartosz
Zakrzewski, Mikołaj
Powiązania:
https://bibliotekanauki.pl/articles/949916.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
blackout
electric power system
restoration power
Opis:
During a blackout, after the post-disaster collapse of an electric power system (EPS), units of thermal power plants should switch-over to the house load operation mode (PPW). However, regarding the dynamics of a post-disaster blackout process, many units can be in forced outage Therefore, restart of these units from the start-up sources with a self-start capability is necessary. The Transmission Network Code in force imposes periodic tests and system tests for such sources. Any system test must be preceded and followed by simulation investigations in which the possibilities: (1) to bring voltage to the started-up power plant by a starting path and (2) to activate the highest-power auxiliaries (PW) of the unit being started-up are evaluated. In the paper, chosen results of simulative investigations of the transient phenomena in the starting path from the hydroelectric power plant of Włocławek (HPP Włocławek) to the thermal power plant of Pątnów (w (TPP Pątnów), related to the system test conducted in September 2017 have been presented.
Źródło:
Archives of Electrical Engineering; 2019, 68, 4; 749-769
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sharp power – wprowadzenie do problematyki
Sharp power – introduction to the issue
Autorzy:
Skoneczny, Łukasz
Cacko, Bogusław
Powiązania:
https://bibliotekanauki.pl/articles/1886664.pdf
Data publikacji:
2021
Wydawca:
Agencja Bezpieczeństwa Wewnętrznego
Tematy:
potęga państwa
sharp power
soft power
hard power
smart power
wojna informacyjna
konflikt hybrydowy
state power
information
warfare
hybrid conflict
Opis:
Celem artykułu jest próba zdefiniowania strategii sharp power, przedstawienie charakterystycznych sposobów jej zastosowania oraz zaproponowanie metod minimalizowania jej negatywnych skutków dla bezpieczeństwa Rzeczpospolitej Polskiej. Po przeanalizowaniu problematyki związanej z rodzajami potęgi państwa (soft power, hard power, smart power) autorzy publikacji sformułowali koherentną definicję sharp power. W dalszej części artykułu opisano przykładowe metody realizacji wspomnianej strategii oddziaływania na uczestników stosunków międzynarodowych. Na koniec autorzy przedstawili propozycje rozwiązań instytucjonalno-prawnych, których zadaniem jest przeciwdziałanie potencjalnym posunięciom z zakresu sharp power ukierunkowanym na zachwianie bezpieczeństwem i pozycją międzynarodową RP.
The aim of the article is an attempt to define the sharp power strategy, present characteristic ways of its employment and propose methods of minimizing its negative consequences for the security of the Republic of Poland. The analysis of the issues related to the types of state power (soft power, hard power, smart power) is followed by a coherent definition of sharp power formulated by the authors of the publication. The consecutive section of the article describes examples of methods of implementing the aforementioned strategy of influencing participants of international relations. Finally, the authors presented proposals for institutional and legal solutions, which are to counteract potential sharp power moves aimed at undermining the security and international position of the Republic of Poland.
Źródło:
Przegląd Bezpieczeństwa Wewnętrznego; 2021, 13, 25; 102-119
2080-1335
2720-0841
Pojawia się w:
Przegląd Bezpieczeństwa Wewnętrznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Modified Signal Feed-Through Pulsed Flip-Flop for Low Power Applications
Autorzy:
Panahifar, E.
Hassanzadeh, A.
Powiązania:
https://bibliotekanauki.pl/articles/226160.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
low power
pulsed flip-flop
delay
leakage power
dynamic power
Opis:
In this paper a modified signal feed-through pulsed flip-flop has been presented for low power applications. Signal feed-through flip-flop uses a pass transistor to feed input data directly to the output. Feed through transistor and feedback signals have been modified for delay, static and dynamic power reduction. HSPICE simulation shows 22% reduction in leakage power and 8% of dynamic power. Delay has been reduced by 14% using TSMC 90nm technology parameters. The proposed pulsed flip-flop has the lowest PDP (Power Delay Product) among other pulsed flip-flops discussed.
Źródło:
International Journal of Electronics and Telecommunications; 2017, 63, 3; 241-246
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possession and Subordination to Power in Professional Relations vs Power in Close Sexual Relations
Autorzy:
Mandal, Eugenia
Kocur, Dagna Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2129761.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Power
need for power
sense of power
sexual domination
Sexuality
Opis:
The aim of the paper was to analyse relations between power in professional work and in close sexual relationships. Power in professional work was analysed with respect to the managerial position, the number of subordinates and salary. Power in close sexual relationships was determined on the basis of a sense of reinforcement of power as a sexual motivation, a propensity for sexual domination, the sense of power in relations with a partner in a close relationship, sexual assertiveness, realization of one’s own sexual phantasies and inclination to initiate sexual activity. The research was carried out on a group of 205 participants in which 100 of respondents occupied managerial positions at work and 105 were subordinates. The following tools were used: the Sense of Power Scale (Anderson, John, & Keltner, 2012), the Multidimensional Sexuality Questionnaire (Snell, Fisher, & Walters, 1993), the AMORE scale (Hill & Preston, 1996), the Need for Power and Influence Questionnaire (Bennett, 1988) and a data sheet. The results showed that power in the workplace was correlated a more frequent initiation of sexual activity, greater assertiveness in sexual matters, more frequent realisation of one’s own phantasies and an increased propensity for sexual domination.
Źródło:
Polish Psychological Bulletin; 2019, 50, 4; 326-333
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power supply with parallel reactive and distortion power compensation and tunable inductive filter – Part 1
Autorzy:
Gwóźdź, M.
Ciepliński, Ł.
Krystkowiak, M.
Powiązania:
https://bibliotekanauki.pl/articles/200798.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
distortion power
PFC
power supply
reactive power
tunable inductive filter
Opis:
The work presents a DC power supply with power factor correction (PFC). This device is also equipped with a parallel active filter function, which enables the possibility of compensation (minimization) of reactive and distortion power, generated by a group of loads, connected to the same power grid node. A passive filter with variable inductance applied at the input of the power supply allows for a significantly improvement in quality of the system control (given specific criteria), as compared to the solution with a filter with fixed parameters. This is possible by increasing the dynamics of current changes at the power supply input (extending its “frequency response”). The paper presents the principle of operation as well as structures and models of the power supply control system and its power stage. Selected test results its power of the simulation model of the electric system with the power supply, in various operating conditions, are also presented.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 401-408
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid Power-Sharing in Indonesia
Autorzy:
Trzciński, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/594502.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Indonesia
hybrid power-sharing
territorial power-sharing
power-sharing
centripetal
consociational
Opis:
The aim of this study is to demonstrate the validity of the thesis that in Indonesia one can find institutions that characterize two power-sharing models which are considered opposites of one another in political theory – centripetalism and consociationalism. In consequence, the Indonesian power-sharing system should be viewed as a hybrid, or mixed, system, and not a typically centripetal system as is usually the case in the literature. At the beginning of this article, a short analysis of Indonesia's political situation is given for the purpose of defining the factors which determined the introduction of inter-segmental power-sharing solutions in that country. This is followed by a description of the specificity of consociationalism and centripetalism. The article goes on to discuss specific institutions of both power-sharing models which exist in Indonesia and ends with some concluding remarks on the thesis advanced at the outset.
Źródło:
Polish Political Science Yearbook; 2017, 1 (46); 168-185
0208-7375
Pojawia się w:
Polish Political Science Yearbook
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The development of the utilisation of water power in Poland
Autorzy:
Mikulski, Zdzisław
Mikulska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2029411.pdf
Data publikacji:
2004-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
hydro power
hydroelectric power stations
water power industry
water power engineering history of technology
Polska
Opis:
First hydroelectric power stations in Poland were built in 19th century, mostly in the region of Podhale (Carpathian tributaries of the Vistula River) and in the Old Polish Industrial District (for the needs of the iron and steel industry) from the initiative of Stanisław Staszic. They were used in mills and saw mills, for home lighting in settlements, etc. After World War I two medium size hydroelectric power stations were constructed in Pomerania (Gródek and Żar) and the construction of a dam (at that time the largest in Europe) was started in Rożnów on the Dunajec River (50 MW); the hydroelectric power station was opened as late as 1941. A small growth in this field took place in the 1950s and 1960s, and in the late 1960s / early 1970s large hydroelectric power stations were built (Solina, Włocławek, Żydowo). The largest growth occurred in the late 1980s and early 1990s, when the two giant peak-load, pumped-storage power stations were put into operation (Porąbka-Żar: 500 MW and Żarnowiec: 680 MW), reaching the total power of 2000 MW. The most recent two large installations are: Czorsztyn-Niedzica (92 MW, 1997) and the modernisation of Solina (200 MW, 2003).
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2004, 11; 185-194
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measuring a Collectivity’s Power to Act in Proper, Simple Voting Games : Why We Should Resist the Readiness to Use the Coleman Index
Autorzy:
Kleinowski, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2044031.pdf
Data publikacji:
2015-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
the power of a collectivity to act
voting power
power of a voting body
power indices
Opis:
James S. Coleman proposed the power of a collectivity to act as a measure of the ease with which the individual interests of one member can be transformed into the collective action of a voting body, or into decisions being undertaken by that body which go against the interests of the voters. It was also to be applied in simple voting games, for which the vote threshold was set at a lower level than the majority of votes. Coleman based his model for determining the power of a collectivity to act on the classical definition of probability. In practice, the index is calculated as a quotient of the number of winning coalitions and of all possible coalitions which can be formed by the players – under the existing voting rule. The central hypothesis of the article has as its premise that in proper, simple nperson voting games the Coleman index does not determine passage probability, but only the probability of drawing a winning coalition from the set of all possible combinations of members of the voting body. A new index has also been proposed which should serve to determine a collectivity’s power to act.
Źródło:
Kultura i Edukacja; 2015, 2(108); 9-29
1230-266X
Pojawia się w:
Kultura i Edukacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparative Analysis of the Power of Selected European Countries. The Economic Determinants
Autorzy:
Paluch, Alicja
Spustek, Henryk
Powiązania:
https://bibliotekanauki.pl/articles/1807597.pdf
Data publikacji:
2021-09-30
Wydawca:
Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie
Tematy:
power of a state
economic power-building factors
a state power model
Opis:
The ever-increasing need for in-depth analysis and quantification of the national power, in particular ‘hard’ and ‘soft’ power-generating factors as well as difficulties in identifying a comprehensive and effective method for scientific determination of the national power, have given rise to research in the indicated scientific issues within this article. The presented considerations aim to define the assumptions for a descriptive sub-model that would enable a comparison of Poland’s power in the economic sphere (which is a component of the non-military sphere) with the power of selected European countries. The research hypothesis is that, among the variety of descriptive variables in the economic sphere of the national power, there is a subset of mutually independent variables, at the same time strongly correlated with the national power, which make it possible to define assumptions for the sub-model of the national power. The steps of the research procedure were carried out using the method of system analysis (multi-criteria comparative analysis) and statistical analysis. The research activities undertaken have shown that the factors that are strongly correlated with the national power in the economic area of the European countries adopted for the analysis are: dynamics of industrial production, private sector credit flows and economic freedom index. The comparative analysis carried out demonstrates that the greatest increase in the economic power in the analysed period took place in Germany (0.68). Slightly smaller growth was recorded in the Czech Republic (0.62) and Poland (0.60), while the lowest value of increase was in Romania (0.23). The conducted qualitative comparative analysis of the economic power of selected European countries allowed to conclude that the independent variables identified are crucial for the formation of the economic power of the analysed countries. At the same time, a fairly strong position of the Czech Republic and Poland in relation to the economic power of Germany was found. The performed quantification of the economic power of the European countries provides a basis for the correct determination of changes in the power distribution of political units, assessment of the power and resources held by the state.
Źródło:
Security Dimensions; 2021, 37(37); 22-42
2353-7000
Pojawia się w:
Security Dimensions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Assessment of Power Quality and Electricity Consumer’s Rights in Restructured Electricity Market in Turkey
Autorzy:
Gul, O.
Powiązania:
https://bibliotekanauki.pl/articles/262663.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
consumer rights
power interruption
power quality
Turkey
Opis:
Recently, electricity consumers have shown increasing concern for power quality. Indeed, power quality standards have become higher than before for certain customers due to sensitivity of automation devices. In addition, power quality is affected by the deregulation of power markets in Turkey. In this study, the consumers are provided with the basic knowledge of power quality and the cost of the poor power quality while on the other hand, the existent regulations are evaluated in terms of consumers’ rights so that poor power quality costs and loss are identified and amended. There are so many regulations in relation to the rights of electrical power consumers in legislation that regulates the relations between distribution companies and the consumers, whereas, in this study, only the issue of power quality is dealt with.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2008, 14, 2; 29-34
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active power filters – optimization of sizing and placement
Autorzy:
Maciążek, M.
Grabowski, D.
Pasko, M.
Powiązania:
https://bibliotekanauki.pl/articles/200825.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power quality
active power filter
harmonics
optimization
Opis:
The significant problem of compensator placement and sizing in electrical networks has been analyzed in the paper. The compensation is usually realized by means of passive or active power filters. The former solution is widely used mainly because of the economical reasons, but the latter one becomes more and more popular as the number of nonlinear loads increases. Regardless of the compensator type the most important goal consists in voltage and current distortion drop below levels imposed by standards. Nevertheless, the desired effects should be achieved with the minimum cost. So far a few objective functions have been proposed for this optimization problem. It is claimed that minimization of the compensator currents leads also to the minimum costs. This paper shows that such simplified approach could lead to suboptimal solutions and in fact a function g(·) reflecting the relation between the compensator size and its price must be incorporated into objective functions. Moreover, in this case it is very easy to compare solutions obtained using compensators offered by different suppliers - it is enough to change the function g(·). Theoretical considerations have been illustrated by an example of active power filter allocation and sizing.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 847-853
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Increasing power supply safety in the aspect of supporting the renewable energy sources by conventional and virtual power stores
Autorzy:
Jakowski, D.
Dzida, M.
Powiązania:
https://bibliotekanauki.pl/articles/259988.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
OZE
power market
energy stores
DSR
power supply safety
electric power system
mangement of electric power demand
Opis:
This paper presents characteristics and purposefulness of supporting the renewable energy sources (OZE) by means of energy stores. The main emphasis was placed on analysis of virtual energy stores available for implementation in Polish economy conditions. A role which management of Demand Side Response (DSR) may play in balancing Polish electric power system, is discussed. Implementation of such solutions together with conventional energy stores may significantly influence power supply safety by assuring continuity of electric power supply at an acceptable price. Involvement of electric power consumers ( DSR ) should be one of the basic solutions for power markets in Poland and Europe.
Źródło:
Polish Maritime Research; 2018, S 1; 189-197
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elektrownia Ostrołęka C w budowie a "momentum-FSI"
Autorzy:
Badur, Janusz
Chróścielewski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/89266.pdf
Data publikacji:
2019
Wydawca:
Nowa Energia
Tematy:
elektroenergetyka
elektrownia
budowa elektrowni
Ostrołęka
power engineering
power station
power plant construction
Opis:
Mimo przeszkód, trwa budowa elektrowni Ostrołęka C. O tym zapewniają nas główni decydenci – Jarosław Małkowski, Prezes Elektrowni Ostrołęka, czy Sławomir Żygowski, Prezes GE Power, firmy odpowiedzialnej projekt, wykonanie i budowę. Możemy o tym dowiedzieć się w mediach społecznościowych. Ale te same media informują również, że 31 lipca 2019 r. Sąd Okręgowy w Poznaniu stwierdził nieważność uchwały Walnego Zebrania akcjonariuszy spółki Enea, zezwalającej na budowę 1000 MW bloku węglowego elektrowni w Ostrołęce. Sąd uznał, że uchwała ma wady formalne dyskwalifikujące budowę. Czy oznacza to koniec tego wspaniałego projektu? Można się z dużym prawdopodobieństwem spodziewać, iż kolejnej instancji sądy UE utrzymają werdykt.
Źródło:
Nowa Energia; 2019, 4; 4-7
1899-0886
Pojawia się w:
Nowa Energia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time-Domain CPC Decomposition: Answers to Comments on “Physical Interpretation of the Reactive Power in Terms of CPC Power Theory Revisited”
Autorzy:
Jeltsema, D.
van der Woude, J.
Powiązania:
https://bibliotekanauki.pl/articles/262614.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
power theory
reactive power
currents' physical components
Opis:
This note addresses some issues raised in [4] and refines some assertions made in our previous work on the time-domain Currents’ Physical Components (CPC) decomposition in [10].
Źródło:
Electrical Power Quality and Utilisation. Journal; 2014, 17, 1; 13-20
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Poynting Vector Approach to the Study of Power Flow through a Transformer
Autorzy:
Todeschini, G.
Emanuel, A. E.
Powiązania:
https://bibliotekanauki.pl/articles/262661.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
power definitions
power quality
Poynting vector
harmonics
Opis:
This work deals with the flow of the electromagnetic energy through an idealized single-phase transformer supplied with nonsinusoidal voltage and supplying a nonlinear load. The electromagnetic flux components of the energy that flows from primary to secondary as well as the flux of energy stored in and ejected from the dielectric space surrounding the windings are identified and quantified. The electromagnetic flux components are correlated to well known instantaneous powers. These powers are not clever mathematic expedients but correct expressions that mirror the actual physical phenomena and lead to a more realistic interpretation of apparent power and its resolution.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2007, 13, 1; 129-137
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Introduction to the Problem of Truncated Power Series Distributions
Wprowadzenie do problemu uciętych rozkładów typu szeregu potęgowego
Autorzy:
Gerstenkorn, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/906298.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
power series
power series distributions
truncated distributions
Opis:
W pracy zostaje podany rozkład uciętej zmiennej losowej klasy typu szeregu potęgowego (PSD). Z klasy tego typu można otrzymać ważne rozkłady prawdopodobieństwa jako szczególne przypadki. Rozważania tu podane dotyczą przypadku, gdy ucięcie jest dokonywane w dowolnym punkcie с, a w szczególnym przypadku, gdy с = 0. Ten przypadek był już rozpatrywany w pracy W. Dyczki (1974).
In the paper there has been characterized a distribution of a truncated random variable of the class of power series distributions (abbrev.: PSD). From this class one can obtain some important distributions as special cases. The considerations relate to the case when the truncation is made at an arbitrary point с and to the special case when с = 0. In this special case one obtain formulae which are identical with those given in paper by W. Dyczka (1974).
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2009, 228
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Does power corrupt or does it facilitate goal attainment? Dominance and functionalist perspectives in psychological models of power
Autorzy:
Ziemiański, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2127569.pdf
Data publikacji:
2019-04-08
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
power
psychological models of power
social perception
Opis:
This article describes how psychological models of power adopt the dominance and functionalist perspective in examining the influence of power on power holders. According to the dominance perspective, power leads to a desire to increase dominance over others and has a negative and corruptive influence on the person holding it, whereas the functionalist perspective puts emphasis on how power aids the attainment of the power holder’s and the group’s goals and should therefore trigger processes helpful in goal attainment. The main object of analysis is the assumptions about how power influences social perception.
Źródło:
Roczniki Psychologiczne; 2017, 20, 3; 641-660
1507-7888
Pojawia się w:
Roczniki Psychologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Balance Sheet and Analysis of Reactive Power Demand in the Polish Power System
Bilans i zapotrzebowanie mocy biernej w Krajowym Systemie Elektroenergetycznym
Autorzy:
Kot, A.
Powiązania:
https://bibliotekanauki.pl/articles/397414.pdf
Data publikacji:
2013
Wydawca:
ENERGA
Tematy:
reactive power
power demand
electric power system
moc bierna
zapotrzebowanie mocy
system elektroenergetyczny
Opis:
The paper presents an analysis of the balance sheet and the reactive power demand of the Polish Power System. Reactive power balance sheets were made for the specific operating conditions of the system: the last winter peak, summer peak and summer off peak load. The basis of the study was load flow models and selected load flow calculation results. In addition, changes in demand for active and reactive power in recent years were presented.
Artykuł podejmuje próbę analizy bilansu i zapotrzebowania na moc bierną Krajowego Systemu Elektroenergetycznego (KSE). Bilanse mocy biernej sporządzono dla charakterystycznych stanów pracy systemu, to jest szczytu zimowego, szczytu letniego oraz doliny letniej. Dane wejściowe stanowiły modele rozpływowe systemu elektroenergetycznego oraz wybrane wyniki obliczeń rozpływów mocy. Ponadto zaprezentowano wielkości zapotrzebowania na moc czynną i bierną w KSE w charakterystycznych stanach pracy systemu na przestrzeni ostatnich lat. Przeanalizowano występujące tendencje zmian na tle warunków regulacji wynikających z bilansów mocy i sformułowano wnioski.
Źródło:
Acta Energetica; 2013, 1; 68-74
2300-3022
Pojawia się w:
Acta Energetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A multi-pulse diode rectifier with a coupled three-phase reactor - the design method and results of the simulation and laboratory tests
Autorzy:
Mysiak, P.
Jankowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/262693.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
power conditioning
multi-pulse power network converters
coupled three-phase power network reactors
Opis:
The article presents the principle of operation, design method, and results of laboratory and simulation tests of a 24-pulse power network converter system with direct-voltage output, the concept and practical realisation of which was worked out within the framework of a research project financed by the State Committee for Scientific Research. The presented converter allows significant reduction of undesirable higher harmonics in the power network current, including the elimination of harmonics of an order 23 and 25. The 24-pulse nature of operation of the system is obtained using three sets of coupled three-phase power network reactors (CTR).
Źródło:
Electrical Power Quality and Utilisation. Journal; 2005, 11, 1; 83-92
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Behavior of single-point harmonic producer indicators in electrified AC railways
Autorzy:
Mariscotti, Andrea
Powiązania:
https://bibliotekanauki.pl/articles/1849160.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
distortion power
electric transportation systems
harmonic source
Power Quality
power system harmonics
railways
Opis:
Electrified railways are an example of AC single phase distribution networks. A non-negligible amount of active and nonactive power may be related to harmonics, especially for distorted highly-loaded systems. The paper considers the relevance of the harmonic power terms in order to identify distortion sources in a single-point perspective, in line with the approach of EN 50463 for the quantification of the power and energy consumption. Some single-point Harmonic Producer Indicators (HPI) based on harmonic active power direction and nonactive distortion power terms are reviewed and evaluated using pantograph voltage and current measured during several hours of runs in two European AC railways (operated at 16.7 and 50 Hz). The HPI based on active power shows to be consistent and provides detailed information of rolling stock characteristic components under variable operating conditions; those based on nonactive distortion power are global indexes and hardly can operate with complex harmonic patterns in variable operating conditions.
Źródło:
Metrology and Measurement Systems; 2020, 27, 4; 641-657
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A power constraint index to rank and group critical contingencies based on sensitivity factors
Autorzy:
Arenas-Crespo, O.
Candelo, J. E.
Powiązania:
https://bibliotekanauki.pl/articles/141453.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
contingency ranking
critical contingencies
power system operation
power system planning
sensitivity power factors
Opis:
Finding the most critical contingencies in a power system is a difficult task as multiple evaluations of load and generation scenarios are needed. This paper presents a mathematical formulation for selecting, ranking, and grouping the most critical N-1 net- work contingencies, based on the calculation of a Power Constraint Index (PCI) obtained from the Outage Transfer Distribution Factors (OTDF). The results show that the PCI is only affected by the impedance parameter of the transmission network, the topology, and the location of all generators. Other methods, such as the Performance Index (PI) and the Overload Index (OL) are affected by the power generation and demand variations. The proposed mathematical formulation can be useful to accelerate the calculation of other methods that evaluate contingencies in power system planning and operation. Furthermore, the fast calculation of indices makes it suitable for online evaluation and classification of multiple events considering the current topology. The results showed that the proposed algorithm easily selected and ranked the expected contingencies, with the highest values of the index corresponding to the most critical events. In the filtering process, the computational calculation time improved without losing the robustness of the results.
Źródło:
Archives of Electrical Engineering; 2018, 67, 2; 247--261
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soft power współczesnej Japonii
The soft power of contemporary Japan
Autorzy:
Łoś, Robert
Powiązania:
https://bibliotekanauki.pl/articles/26850866.pdf
Data publikacji:
2017
Wydawca:
Akademia Zamojska
Tematy:
Japanese soft power resources
public diplomacy
soft power
soft power Japonii
dyplomacja publiczna
Opis:
Pozycja Japonii po II wojnie światowej nabrała innego znaczenia. Wyznaczały ją klęska wojenna i konieczność szukania innej drogi rozwoju. Tą drogą było przyjęcie części zachodnich wartości – głównie amerykańskich – i zasad wolnego rynku w sferze ekonomii. Reorientacji uległa również polityka zagraniczna, która musiała nastawić się na wsparcie gospodarki poprzez szukanie i utrzymanie dobrych relacji z zagranicą. Większego znaczenia nabrały wszelkie instrument związane z soft power, czyli typowej dla Japonii kultury i wartości, które jednak połączone z wartościami Zachodu, maja korzystny wpływ na rozwój tego kraju. Najlepiej jest to widoczne we wzroście znaczenia tego państwa, które potrafiło wiele zyskać w kategorii miękkiej siły, pomimo hermetyczności własnej kultury i wartości. To one wraz z pokojową polityką i modelem gospodarczego rozwoju idealnie odzwierciedlały możliwości użycia soft power.
Japan’s position after World War II acquired a new dimension determined by the loss of war and the necessity of finding a new path of development. It derived itself from taking over Western values, mainly Northern American ones, as well as free market principles. Foreign policy underwent a significant reorientation, as supporting economy and developing new foreign relations became necessary. Therefore, instruments related to soft power gained importance. Culture and values characteristic for Japan combined with Western values had a positive effect on Japan’s development. It is most evident when observing the increase of Japan’s international relevance. In spite of having rather hermetic culture, this country was able to achieve a lot in the category of soft power. Those values and culture in general, together with peaceful policies and a new model of economic development, ideally mirrored the opportunities deriving from the usage of soft power.
Źródło:
Facta Simonidis; 2017, 10, 1; 49-65
1899-3109
Pojawia się w:
Facta Simonidis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Holomorphic non-holonomic differential systems on complex manifolds
Autorzy:
Dimiev, S.
Powiązania:
https://bibliotekanauki.pl/articles/1312446.pdf
Data publikacji:
1991
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
power -expansion
Opis:
We study coherent subsheaves of the holomorphic tangent sheaf of a complex manifold. A description of the corresponding -stable ideals and their closed complex subspaces is sketched. Our study of non-holonomicity is based on the Noetherian property of coherent analytic sheaves. This is inspired by the paper [3] which is related with some problems of mechanics.
Źródło:
Annales Polonici Mathematici; 1991, 55, 1; 65-73
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kondensatory energoelektroniczne nowej generacji. Podwyższone parametry użytkowe dzięki zastosowaniu nowoczesnych materiałów oraz technologii
Autorzy:
Sobieski, R.
Powiązania:
https://bibliotekanauki.pl/articles/304997.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo Druk-Art
Tematy:
kondensator energoelektroniczny
półprzewodnik mocy
układ energoelektroniczny
power electronics layout
power semiconductor
power capacitor
Opis:
Jeden z największych producentów kondensatorów – firma Ducati Energia – wprowadza systematycznie na rynek nowe serie produktów o podwyższonych parametrach użytkowych dla spełnienia wymagań odbiorców z branży energoelektronicznej.
Źródło:
Napędy i Sterowanie; 2017, 19, 9; 22-24
1507-7764
Pojawia się w:
Napędy i Sterowanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bilans mocy biernej Krajowego Systemu Elektroenergetycznego
Balance sheet and analysis of reactive power demand in the polish power system
Autorzy:
Kot, A.
Powiązania:
https://bibliotekanauki.pl/articles/267495.pdf
Data publikacji:
2013
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
moc bierna
zapotrzebowanie mocy
system elektroenergetyczny
reactive power
power demand
electric power system
Opis:
Artykuł podejmuje próbę analizy bilansu i zapotrzebowania na moc bierną Krajowego Systemu Elektroenergetycznego (KSE). Bilanse mocy biernej sporządzono dla charakterystycznych stanów pracy systemu. Przeanalizowano występujące tendencje zmian na tle warunków regulacji wynikających z bilansów mocy i sformułowano wnioski.
The paper presents an analysis of the balance sheet and the reactive power demand of the Polish Power System. Reactive power balance sheets were made for the specific operating conditions of the system: the last winter peak, summer peak and summer off peak load. The basis of the study was load flow models and selected load flow calculation results. In addition, changes in demand for active and reactive power in recent years were presented.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2013, 32; 23-26
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finding Poland’s International Position
Autorzy:
Lubojemski, Aleksander M.
Powiązania:
https://bibliotekanauki.pl/articles/594657.pdf
Data publikacji:
2019
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
national power
middle power
regional power
Polska
militaristic capabilities
economic strength
Eastern Europe
Opis:
The changing political system of the XXI century has brought many shifts not only in the global balance of power but also in various regional balances scattered across the globe. The rise of national power in countries beforehand classified as small powers or other equivalents has forced to once again place these states in the newly created balances of power. Amongst these states is Poland, whose national power has grown substantially in the last decade. Hence, it is necessary to analyze how Poland compares to other states in the international system, on a global and regional level, and through this evaluate what Poland’s international position is. The article aims at assessing Polish national power and roles in regional initiatives to examine how Poland is placed in the global and regional balance of power.
Źródło:
Polish Political Science Yearbook; 2019, 1 (48); 90-102
0208-7375
Pojawia się w:
Polish Political Science Yearbook
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical Interpretation of the Reactive Power in Terms of CPC Power Theory Revisited
Autorzy:
Jeltsema, D.
van der Woude, J.
Powiązania:
https://bibliotekanauki.pl/articles/262600.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
power theory
reactive power
current’s physical
components
Opis:
Recently the authors have developed a time-domain representation of the Currents’ Physical Components (CPC) power theory. Consequently, piece-wise continuous currents and voltages, such as square waves and sawtooth signals, can naturally be taken into account without approximating them by a finite number of harmonics. Based on the time-domain CPC approach, this paper refines and corrects some of the assertions made by Czarnecki in his paper ‘Physical Interpretation of the Reactive Power in Terms of CPC Power Theory’.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2013, 16, 2; 1-6
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power Quality Enhancement Using DSTATCOM in Industry Plants
Autorzy:
Bayu, Atinkut
Powiązania:
https://bibliotekanauki.pl/articles/1193908.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
power quality
power quality problem
DSTATCOM
Matlab/Simulink
Opis:
This paper is focused on increasing the power quality of Unique Macaroni factory, located in Bahir Dar Town. Necessary data have been collected from the factory and the collected data are analysed. Based on the analysis of data, it is found that the factory working power factor is low and hovering around 0.7125. Voltage variations are up to 9.09%, average voltage unbalance is 2.2% and total harmonic distortion (THD) of load currents and voltage are 24.17% and 10.16%, respectively. Harmonic components have existed in the power distribution system of the factory. Based on the analysis of power quality problem in the factory, distribution static compensator (DSTATCOM) and its control system have been designed to boost power quality of the factory and the results are obtained by generating simulations using Matlab software. It is observed from outputs of the Matlab simulations that DSTATCOM can improve the power quality of the factory. Generally, the shape of the waveform of load voltage and current is improved and THD level of load voltage is minimised to 1.55% and load current THD level is 7.09%. The reactive power needed by the loads (442 kVAr) is almost provided by the DSTATCOM, so reactive power from source supply is very small such as 22 kVAr so that the power factor of the source tends to unity.
Źródło:
Power Electronics and Drives; 2020, 5, 40; 157-175
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A - 5 dBm 400MHz OOK Transmitter for Wireless Medical Application
Autorzy:
Yousefi, M.
Koozehkanani, Z. D.
Jangi, H.
Nasirzadeh, N.
Sobhi, J.
Powiązania:
https://bibliotekanauki.pl/articles/226054.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transmitter
power amplifier
on-off keying
low power
Opis:
A 400 MHz high efficiency transmitter for wireless medical application is presented in this paper. Transmitter architecture with high-energy efficiencies is proposed to achieve high data rate with low power consumption. In the on-off keying transmitters, the oscillator and power amplifier are turned off when the transmitter sends 0 data. The proposed class-e power amplifier has high efficiency for low level output power. The proposed on-off keying transmitter consumes 1.52 mw at-5 dBm output by 40 Mbps data rate and energy consumption 38 pJ/bit. The proposed transmitter has been designed in 0.18μm CMOS technology.
Źródło:
International Journal of Electronics and Telecommunications; 2014, 60, 2; 193-198
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Sources of Russia’s Soft Power in Relation to Belarus
Autorzy:
Ławniczak, Ryszard Franciszek
Powiązania:
https://bibliotekanauki.pl/articles/31343396.pdf
Data publikacji:
2024-03-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
soft power
hard power
information warfare
Belarus-Russia
Opis:
This paper aims to evaluate the sources of Russia’s soft power as a tool which should enable it to integrate Belarus more closely with Russia. The research question is as follows: what are Russia’s main sources of attractiveness, and what kind of instruments of soft power is the Russian government applying to achieve that aim? To what extent was this soft policy successful? The author applied a qualitative research method. It is inductive and allows the researcher to explore meanings and insights into Russia’s notion of “soft power” in its foreign policy toward Belarus. The basis of it lies in the interpretive approach to the present reality of Russia – Belarus political and economic relations and in the evaluation of Russian efforts to integrate its closest neighbour by using only non-military means.
Źródło:
Nowa Polityka Wschodnia; 2024, 1(40); 21-31
2084-3291
Pojawia się w:
Nowa Polityka Wschodnia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected issues of coal-fired power generation in terms of maintaining its high share in the future structure of electricity generation in Poland
Autorzy:
Pospolita, W.
Cholewinski, M.
Powiązania:
https://bibliotekanauki.pl/articles/101756.pdf
Data publikacji:
2018
Wydawca:
Instytut Polityki Energetycznej im. Ignacego Łukasiewicza
Tematy:
coal power engineering
conventional power engineering
renewable energy sources
power generation system
European Union
Opis:
The Polish economy is one of the most dynamically developing economies in Europe. However, this development over the next 30 years is threatened by the lack of adequate supply of cheap and reliable energy. This is due to an array of negligence and delays in the expansion and reconstruction of the energy system. Due to the increasingly urgent need to solve this problem, many concepts about the direction in which the development of the Polish power system should go have emerged. This article presents arguments emphasising the advisability of maintaining the maximum high share of coal-fired power plants in the future structure of power generation. There is proven that raw materials in Poland may ensure stable development of the economy for next 100 years. Also, thanks to new technologies, CO2emissions may by reduced by half.
Źródło:
Energy Policy Studies; 2018, 1 (2); 62-80
2545-0859
Pojawia się w:
Energy Policy Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mathematical description of the electromagnetic transitory processes in synchronous electric mashine as the shaft-generator. Principles and the methodology of the description
Autorzy:
Nienartowicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/359961.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
ship power
power plan
electric power station
dynamics
mathematical model
electromagnetics system
shaft generator
Opis:
On the contemporary ships wide applies the systems electromagnetic with the shaft-generator. The simulating investigations of the dynamics of the electromagnetic transitory processes in such system need the complex model mathematical study, describing the dynamics of objects in him contained. The following article is the next part of the final description of the mathematical model of the shipping system electromagnetics with the shaft-generator. The paper describes external conditions, which can influencing on the course of electromagnetic processes in the systems and there is giving exit principles of the description of the electromagnetic transitory processes in synchronous electric mashine, which is working as the shaft-generator (PW).
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 2; 153-158
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mathematical model of the shipping main engine as the drive of the shaft-generator. Assumptions and the methodology of the description
Autorzy:
Nienartowicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/359994.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
ship power
power plant
electric power station
dynamics
mathematical model
electromagnetic system
shaft generator
Opis:
The contemporary shipping technics wide applies the systems electromagnetic with the shaft -generator. The simulating investigations of transitory processes electromagnetic in such system need the complex model mathematical study, describing the dynamics of objects in him contained. The following article is the first part of the final description of the mathematical model of the shipping system electromagnetics with the shaft-generator. The paper describes external conditions, which can influencing on the course of electromagnetic processes in the systems and there is giving the proposed mathematical model of the Shipping Main Engine as the drive of the Shaft-Generator.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 2; 148-152
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alternatywne podejście do bezpieczeństwa – soft power
Alternative approach to security – soft power
Autorzy:
Maciejewski, Jan
Borowska, Donata
Powiązania:
https://bibliotekanauki.pl/articles/1933811.pdf
Data publikacji:
2020-12-17
Wydawca:
Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie
Tematy:
bezpieczeństwo
miękka siła
twarda siła
siła rozsądku
security
soft power
hard power
smart power
Opis:
Celem artykułu jest przedstawienie w ujęciu politologiczno-socjologicznym problemu alternatywnego podejścia do bezpieczeństwa, które ma powiązania z soft power w kontekście zapewnienia bezpieczeństwa każdemu człowiekowi. Autorzy proponują rozpatrywanie alternatyw bezpieczeństwa w drugiej dekadzie XXI wieku jako połączenia soft power i hard power – czyli smart power – w dziedzinie relacji społecznych i politycznych. Prowadzenie polityki w duchu soft power zdaje się szczególnie zasadne i istotne w obliczu współczesnego kryzysu imigracyjnego i uchodźczego. Nowoczesne państwa, zwłaszcza europejskie oraz Stany Zjednoczone, to podmioty bezpieczeństwa, które zarówno bronią, jak i szukają bezpieczeństwa za pomocą soft power przy ewentualnym wsparciu – w razie konieczności – hard power. Autorzy omawiają to zjawisko na przykładzie USA. Artykuł w istotny dla nauk o bezpieczeństwie sposób przedstawia relacje pomiędzy wiedzą a władzą, ponieważ to one określają współczesne społeczeństwa. Podejście do bezpieczeństwa w duchu soft power wyrasta na ważny element kształtujący kulturę bezpieczeństwa.
The purpose of the article is to describe, from the perspective of political science and sociology, an alternative approach to security connected with soft power in the context of the endeavour to ensure security to every human being. The authors propose to consider security-related alternatives of the second half of the 21st century as a combination of soft power and hard power – that is, smart power – applied in the area of social and political relations. Conducting politics in the spirit of soft power seems particularly justified and substantial in the face of the contemporary immigration and refugee crisis. Modern states, especially European states and the US, are security subjects that both defend security and seek it using soft power with potential support – when necessary – on the part of hard power. The authors discuss this phenomenon on the example of the US. The article shows, in a manner substantive for security sciences, the relations between knowledge and power, because it is them that determine contemporary societies. An approach to security in the spirit of soft power is becoming a significant factor shaping security culture.
Źródło:
Kultura Bezpieczeństwa. Nauka – Praktyka – Refleksje; 2020, 38(38); 66-78
2299-4033
Pojawia się w:
Kultura Bezpieczeństwa. Nauka – Praktyka – Refleksje
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 5245

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