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Wyświetlanie 1-15 z 17
Tytuł:
Belief in the causative power of words as a manifestation of magical thinking in late childhood
Autorzy:
Bieńkowska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/430131.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magical thinking
late childhood
language
phraseological units
Opis:
The purpose of the research was to present one of the manifestations of magical thinking in late childhood, i.e. belief in the causative power of words, and relations between this phenomenon and language. One hundred and three primary school students (43 girls and 60 boys), grades 4 to 6, aged 10 to 13 were studied. A significant relation was found between belief in the direct effect of words on reality, and correct comprehension and number of phraseological units concerning the causative power of words.
Źródło:
Polish Psychological Bulletin; 2011, 42, 4; 226-234
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Delimitacja jednostek architektoniczno-krajobrazowych kluczem do efektywnego zarządzania krajobrazem miasta
Delimitation of architectonic-landscape units as key for efficient management of the city land
Autorzy:
Nowak, P.
Powiązania:
https://bibliotekanauki.pl/articles/131739.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
zarządzanie krajobrazem
delimitacja jednostek krajobrazowych
landscape management
delimitation of city landscape units
Opis:
W strukturach miast zachodzą stałe przemiany funkcjonalno-przestrzenne, które znajdują odzwierciedlenie w ich współczesnym krajobrazie. Ogromna skala obecnych miast stwarza trudności w zarządzaniu ich niejednorodnym krajobrazem, który w ramach jednego miasta może składać się z szeregu różnych jednostek krajobrazowych o odrębnej charakterystyce i walorach. Identyfikacja i delimitacja jednostek architektoniczno- -krajobrazowych w oparciu o badania terenowe oraz studialne jest więc kluczem do zarządzania krajobrazem miast. Obecne podziały administracyjne nie stanowią podstawy do zarządzania krajobrazem poszczególnych dzielnic, w ramach których może występować nawet kilka jednostek architektoniczno-krajobrazowych. Delimitacja krajobrazów miasta, stanowiąca część składową Miejscowego Planu Zagospodarowania Przestrzennego może stać się podstawą do ustalania szczegółowych wytycznych kształtowania krajobrazu poszczególnych jednostek architektoniczno-krajobrazowych i efektywnego zarządzania krajobrazem miast.
In the structure of cities functional and spatial transformations are constant and are reflected in their contemporary landscape. The enormous scale of present cities creates difficulties in managing their heterogeneous landscape. This city landscape is composition of a number of different landscape units with distinct characteristics and values. Identification and delimitation of those landscape units based on field and study research could therefore be the key for urban landscape management. The current administrative city districts do not include landscape in as material for administration. In one administrational city district even few landscape units can be found. The delimitation of city landscapes as a part of Local Spatial Development Plan may be the basis for setting detailed guidelines for landscape administration. Landscape units therefore could become efficient management tool for urban landscaping.
Źródło:
Teka Komisji Urbanistyki i Architektury Oddział PAN w Krakowie; 2018, 46; 335-342
0079-3450
2450-0038
Pojawia się w:
Teka Komisji Urbanistyki i Architektury Oddział PAN w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Typologia międzykrajowych badań porównawczych a kluczowe problemy metodologiczne
THE TYPOLOGY OF INTERNATIONAL COMPARATIVE RESEARCH AND KEY METHODOLOGICAL PROBLEMS
Autorzy:
Slomczynski, Kazimierz M.
Powiązania:
https://bibliotekanauki.pl/articles/427486.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
EQUIVALENCY OF OBSERVATION UNITS
FUNCTIONAL EQUIVALENCY OF VARIABLES
TYPES OF CROSS-NATIONAL STUDIES
Opis:
One can distinguish between the sociological comparative research depending on whether they aim to explain international (macro-macro relationships) or intra-national differentation (macro - micro). Based on this distinction, the typology has been made which takes into account various kind of characterictics of the countries as well as number of countries. The typology allows to fi gure out many problems related to functional equivalence in the comparative research. In particular, the analysis of the three kinds of the functional equivalence was made - namely that of: the units of observation (subject equivalence), indicators and constructs (measurement equivalence), as well as the stage of observed facts (processual - temporal equivalence). Key words: types of cross-national studies; equivalency of observation units; functional equivalency of variables.
Źródło:
Studia Socjologiczne; 2011, 1(200); 469-482
0039-3371
Pojawia się w:
Studia Socjologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of unit load formation taking into account the mass of packaging units
Autorzy:
Popiela, K.
Wasiak, M.
Powiązania:
https://bibliotekanauki.pl/articles/224047.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
unit loads
formation of loading units
loading space
optimalization
jednostki ładunkowe
przestrzeń ładunkowa
optymalizacja
Opis:
This article presents a mathematical formulation of the optimization problem of loading unit formation taking into account the mass of packaging units. Proposed model can be applied to optimize the arrangement of non-uniform cubical loading units in loading spaces. The model ensures possibility of defining various dimensions, masses, resistances of particular packaging units and their vertical axis rotation. Within the constraints of formulating optimization problem, taking into account masses and resistances ensures that all packaging units will rest on a pallet or on other packaging units, and the surface of contact between loading units guarantees stability of units arranged in subsequent layers. The mathematical model was verified. The paper provides an appropriate calculation example.
Źródło:
Archives of Transport; 2014, 32, 4; 73-80
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of safety requirements for large offshore units evacuation systems. LSA safety function
Analiza wymagań dotyczących bezpieczeństwa systemów ewakuacyjnych dużych obiektów oceanotechnicznych. Funkcja bezpieczeństwa LSA
Autorzy:
Abramowicz-Gerigk, T.
Burciu, Z.
Powiązania:
https://bibliotekanauki.pl/articles/224341.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
drilling platforms
large offshore units
safety
evacuations
platformy wiertnicze
duże obiekty oceanotechniczne
bezpieczeństwo
ewakuacja
Opis:
The paper presents the problems related to the effectiveness of evacuation systems for large offshore installations. The analysis of safety requirements related to the complex evacuation, escape and rescue (EER) system elements has been carried out on the basis of the reports from the accidents of offshore drilling and production platforms. The safety function developed for life saving appliances (LSA) - the 6, 10 and 20 persons liferafts is presented as an example of a method for life saving appliances safety assessment.
W artykule przedstawiono problemy dotyczące efektywności systemów ewakuacji ludzi z dużych obiektów oceanotechnicznych w sytuacji zagrożenia życia. Na podstawie raportów powypadkowych platform wiertniczych i wydobywczych przeprowadzono analizę wymagań związanych z bezpieczeństwem elementów złożonych systemów ewakuacyjnych, ratunkowych i ratowniczych. Przedstawiono funkcję bezpieczeństwa opracowaną dla środków ratunkowych - 6, 10 i 20 osobowych tratew ratunkowych, jako przykład metody oceny bezpieczeństwa zbiorowych środków ratunkowych.
Źródło:
Archives of Transport; 2012, 24, 4; 429-440
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving state estimation in smart distribution grid using synchrophasor technology: a comparison study
Autorzy:
Richter, M.
Komarnicki, P.
Hauer, I.
Powiązania:
https://bibliotekanauki.pl/articles/141592.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
accuracy analysis
case study
distribution grid state estimation
phasor measurement units
weighted least squares
Opis:
Both the growing number of dispersed generation plants and storage systems and the new roles and functions on the demand side (e.g. demand side management) are making the operation (monitoring and control) of electrical grids more complex, especially in distribution. This paper demonstrates how to integrate phasor measurements so that state estimation in a distribution grid profits optimally from the high accuracy of PMUs. Different measurement configurations consisting of conventional and synchronous mea- surement units, each with different fault tolerances for the quality of the calculated system state achieved, are analyzed and compared. Weighted least squares (WLS) algorithms for conventional, linear and hybrid state estimation provide the mathematical method used in this paper. A case study of an 18-bus test grid with real measured PMU data from a 110 kV distribution grid demonstrates the improving of the system’s state variable’s quality by using synchrophasors. The increased requirements, which are the prerequisite for the use of PMUs in the distribution grid, are identified by extensively analyzing the inaccuracy of measurement and subsequently employed to weight the measured quantities.
Źródło:
Archives of Electrical Engineering; 2018, 67, 3; 469--483
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
El papel del co(n)texto en la interpretación de las unidades fraseológicas
The role of co(n)text in the interpretation of phraseological units
Autorzy:
Gwiazdowska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2054288.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phraseology
co(n)textual dependency
co(n)textual supports
phraseological meaning
markers of phraseological units
Opis:
The aim of this article is to analyze the role of phraseological units (PhUs) in discourse and to investigate their co(n)textual dependency. The paper presents a typology of the lexical and phraseological units, labelled as co(n)textual supports and developed by Olza y Losada (2011): expressions that paraphrase the initial phraseological meaning; expressions that highlight a specific component of this meaning; lexical and phraseological units that are synonymous with the ‘central’ phraseological expression they co-occur with; and lexical and phraseological units that are antonymous with the ‘central’ expression. These units orient and specify the use and interpretation of PhUs. The analysis also focuses on the so-called markers of phraseological units that function as (quasi) PhUs that serve to introduce phraseology within discourse in a (more or less) explicit way and have pragmatic discursive value (cfr. Olza 2013). The last part of the article examines some PhUs whose implicatures can be affected by contextual circumstances and characterized by greater dependence on the general context of the statement despite showing some degree of conventionalization.
Źródło:
Linguistica Silesiana; 2020, 41; 85-103
0208-4228
Pojawia się w:
Linguistica Silesiana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methodology of testing shot blasting machines in industrial conditions
Autorzy:
Wrona, R.
Zyzak, P.
Ziółkowski, E.
Brzeziński, M.
Powiązania:
https://bibliotekanauki.pl/articles/382809.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
badanie nieniszczące
obróbka wykańczająca
metodyka badań
nondestructive testing
finishing treatment
blasting units
operation and maintenance
test methodology
Opis:
Shot blasting machines are widely used for automated surface treatment and finishing of castings. In shot blasting processes the stream of shots is generated and shaped by blasting turbines, making up a kinetic and dynamic system comprising a separating rotor, an adapting sleeve and a propelling rotor provided with blades. The shot blasting performance- i.e. the quality of shot treated surfaces depends on the actual design and operational parameters of the unit whilst the values of relevant parameters are associated with the geometry of turbine components and the level of its integration with the separator system. The circulation of the blasting medium becomes the integrating factor of the process line, starting from the hopper, through the propeller turbine, casting treatment, separation of contaminated abrasive mixture, to its recycling and reuse. Inferior quality of the abrasive agent (shot) and insufficient purity of the abrasive mixture are responsible for low effectiveness of shot blasting. However, most practitioners fail to fully recognise the importance of proper diagnostics of the shot blasting process in industrial conditions. The wearing of major machine components and of the blasting agent and quality of shot treated surfaces are often misinterpreted, hence the need to take into account all factors involved in the process within the frame of a comprehensive methodology. This paper is an attempt to formulate and apply the available testing methods to the engineering practice in industrial conditions.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 97-104
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmentally friendly replacement of mature 200 MW coal-fired power blocks with 2 boilers working on one 500 MW class Steam Turbine Generator (2on1 unit concept)
Autorzy:
Grzeszczak, J.
Grela, Ł.
Achter, T.
Powiązania:
https://bibliotekanauki.pl/articles/240337.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
coal fired power plant
flexibility increasing
old units replacement
elektrownia opalana węglem
zwiększanie elastyczności
wymiana starych jednostek
Opis:
The paper covers problems of the owners of a fleet of long-operated conventional power plants that are going to be decommissioned soon in result of failing to achieve new admissible emissions levels or exceeding pressure elements design lifetime. Energoprojekt-Katowice SA, Siemens AG and Rafako SA presents their joint concept of the solution which is a 2on1 concept – replacing two unit by two ultra-supercritical boilers feeding one turbine. Polish market has been taken as an example.
Źródło:
Archives of Thermodynamics; 2017, 38, 4; 165--190
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grid-side current harmonic suppression based on Butterworth filter and quasi-proportional resonance controller
Autorzy:
Zhao, Feng
Zhang, Jianing
Chen, Xiaoqiang
Wang, Ying
Powiązania:
https://bibliotekanauki.pl/articles/2172801.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Butterworth filter
current harmonic suppression
high-speed electric multiple units
quasi-PR controller
traction drive system
Opis:
In order to meet the lightweight requirements of high-speed trains, the inductancecapacitance (LC) resonance circuits are cancelled in the traction drive system of some high-speed electric multiple units (EMUs) in China, which will lead to large low-order current harmonics on the grid side in the traction drive system of EMUs, seriously affecting the power quality. Therefore, the low-order harmonic current of the traction drive system of an EMU is studied in this paper. Firstly, the working principle of a four-quadrant pulse rectifier in a traction drive system is analyzed, and then the generation mechanism of loworder current harmonics on the grid side is studied deeply. Secondly, the voltage outer loop and current inner loop control of a four-quadrant pulse rectifier are optimized respectively. In the voltage outer loop control, a Butterworth filter is designed to suppress the beat frequency voltage of the DC side voltage, so as to indirectly suppress the low-order current harmonics. In the current inner loop, a quasi-proportional resonance (PR) controller with harmonic compensation is used to suppress low-order current harmonics, and a novel loworder current harmonics suppression strategy based on the Butterworth filter and quasi-PR controller is proposed. Finally, the results of the simulated validation of the proposed control strategy show that compared with the existing method of the notch filter ₊ PR controller, the proposed optimal control strategy has a better effect on low-order current harmonic suppression, and improves the dynamic performance of the control system, further showing the correctness and effectiveness of the optimal control strategy.
Źródło:
Archives of Electrical Engineering; 2022, 71, 4; 909--929
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Фразеологические и паремиологические заимствования петровской эпохи как диалог культур
Phraseological and Paremiological Borrowings During the Era of Peter the Great: A Dialogue of Cultures
Autorzy:
Мокиенко, Валерий
Powiązania:
https://bibliotekanauki.pl/articles/2030660.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
The era of Peter the Great
European innovations of Peter’s time
phraseological units
paremias
proverbs
tracing
Źródło:
Slavia Orientalis; 2021, LXX, 4; 799-811
0037-6744
Pojawia się w:
Slavia Orientalis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Continuation of Prof. Władysław Latek’s research – revitalization of old power units
Autorzy:
Krok, R.
Pasko, M.
Powiązania:
https://bibliotekanauki.pl/articles/200213.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
turbogenerator design
modernization of power units
increase of installed power
turbogenerator
modernizacja bloków energetycznych
wzrost mocy zainstalowanej
Opis:
The research conducted by Prof. Władysław Latek (1916‒1991) has contributed greatly to development in turbogenerator design. The economical transformation taking place in Poland after 1991 initiated the process of revitalization of old power units in electric power stations. For the past 25 years, a team of scientists continuing the work on perfecting the turbogenerator design and design methods has been working in the Faculty of Electrical Engineering of Silesian University of Technology. The work of this team has led to proposing and implementing many modernization projects for turbogenerators operating in Polish power plants, as well as in power plants in European Union and Asian states. Numerous novel and innovative solutions have made it possible to significantly increase turbogenerator power, improve effectiveness of electrical energy production and reliability and safety of operation.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 4; 957-962
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of the internal reheat application on the efficiency of the 900 MW ultra-supercritical coal-fired power unit
Autorzy:
Łukowicz, H.
Dykas, S.
Stępczyńska, K.
Rulik, S.
Powiązania:
https://bibliotekanauki.pl/articles/240128.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sprawność generowania energii elektrycznej
ultra-nadkrytyczne bloki energetyczne
wewnętrzne podgrzewanie
electricity generation efficiency
internal reheat
ultra-supercritical coal-fired power units
Opis:
The paper presents a thermal-economic analysis of a 900 MW coal-fired power unit for ultra-supercritical parameters with internal steam reheat. The subject of the study was the cycle proposed as the "initial thermal cycle structure" during the completion of the project "Advanced Technologies for Energy Generation" with the steam parameters of 650/670 [degrees]C/30 MPa. Two configurations of internal reheat were analysed: with a fourand seven-section exchanger. The effect of reheat on the operation of the power unit under a partial load was also analysed, and preliminary calculations of the heat exchange area of the internal reheat were made.
Źródło:
Archives of Thermodynamics; 2011, 32, 3; 127-144
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcje i metody w polskich badaniach przestrzenno-elektoralnych
Autorzy:
Matykowski, Roman
Powiązania:
https://bibliotekanauki.pl/articles/2021517.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electoral geography
spatial pattern units
concepts of the impact of factors and conditions on election results
Polska
Nauki Humanistyczne i Społeczne
Źródło:
Studia komitetu przestrzennego zagospodarowania kraju PAN; 2018, 183; 149-171
0079-3507
Pojawia się w:
Studia komitetu przestrzennego zagospodarowania kraju PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal and economic investigation of straight and U-bend double tube heat exchanger with coiled wire turbulator
Autorzy:
Andrzejczyk, Rafał
Muszyński, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/239983.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
NTU – number of transfer units
heat exchanger
heat transfer coefficient
energy efficiency
wymiennik ciepła
współczynnik wnikania ciepła
efektywność energetyczna
metoda NTU
Opis:
Experimental research has been carried out for four individual heat exchanger constructions, i.e., plain double tube, turbulized double tube, plain U-bend and U-bend with turbulator. Tests were made for the water-water system. The study covered a wide measuring range, i.e., Re = 800–9000 – on the shell side, for a constant cold water temperature of 9°C and hot water of 50°C. The heat exchangers were made from copper tubes with external diameter of 10 mm and 18 mm respectively and wall thickness of 1 mm. The helicoidal vortex generator was made from brass wire with a diameter of 2.4 mm, coil diameter of 13 mm and pitch of 11 mm. For these geometries, the values of pressure drop, heat flux and heat transfer coefficient were determined. Wire coil turbulator increased the heat transfer coefficient (HTC) over 100% and pressure drop up by 100%. The comparison of heat transfer efficiency was performed based on the number of transfer units-effectivenes (NTU-ε) method. The modified construction achieved a similar efficiency. Economic analysis of wire coil turbulator was made to validate its use in the system. It showed that a coiled wire turbulator can greatly decrease the investment cost of the double tube heat exchanger while maintaining transferred heat at a constant level.
Źródło:
Archives of Thermodynamics; 2019, 40, 2; 17-33
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 17

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