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Wyświetlanie 1-15 z 55
Tytuł:
Академик Петър Динеков и младият полски българист Едвард Можейко (епистоларни свидетелства от 60-те години на ХХ век)
Autorzy:
Иванова, Мая
Powiązania:
https://bibliotekanauki.pl/articles/1890762.pdf
Data publikacji:
2021-02-23
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Petar Dinekov
Edward Możejko
unknown letter
1960s
Stanisław Urbańczyk
Józef Magnuszewsk
Stanisław Pigoń
Jerzy Rusek
Jan Safarewicz
Włodzimierz Kot
Charles A. Mose
Bulgarian-Polish academic contacts
Bulgaria
archive materials
Opis:
The article presents hitherto unknown letters in Polish by Edward Możejko, a Canadian scholar of Polish origin, to the Bulgarian scholar Petar Dinekov. These letters reveal the professional contacts between the two men in the 1960s when the young Możejko defends his dissertation on a topic in the field of Bulgarian studies at the Jagiellonian University and Dinekov is one of his reviewers. The letters are explored in the context of other documentary sources. The present study is part of a larger project on epistolary heritage testifying the active professional contacts of Dinekov with the Polish cultural intelligentsia.
Źródło:
Poznańskie Studia Slawistyczne; 2020, 19; 169-190
2084-3011
Pojawia się w:
Poznańskie Studia Slawistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zimowanie nietoperzy Chiroptera w wybranych obiektach wolno stojących Frontu Fortecznego Łuku Odry i Warty
Wintering of bats Chioptera in selected stand-alone objects of the Fortified Front of the Odra-Warta Arch
Autorzy:
Warchalowski, A.
Lupicki, D.
Cichocki, J.
Pietraszko, M.
Rusek, A.
Zawadzka, A.
Mazur, N.
Powiązania:
https://bibliotekanauki.pl/articles/32793.pdf
Data publikacji:
2013
Wydawca:
Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
Tematy:
nietoperze
Chiroptera
zimowanie zwierzat
Miedzyrzecki Rejon Umocniony
gatunki zwierzat
sklad gatunkowy
roznorodnosc gatunkowa
Front Forteczny Luku Odry i Warty
inwentaryzacja zwierzat
bunkry
schrony
Źródło:
Kulon; 2013, 18
1427-3098
Pojawia się w:
Kulon
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A counterexample to a conjecture of Drużkowski and Rusek
Autorzy:
van den Essen, Arno
Powiązania:
https://bibliotekanauki.pl/articles/1311428.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
polynomial automorphisms
Jacobian Conjecture
Opis:
Let F = X + H be a cubic homogeneous polynomial automorphism from $ℂ^n$ to $ℂ^n$. Let $p$ be the nilpotence index of the Jacobian matrix JH. It was conjectured by Drużkowski and Rusek in [4] that $deg F^{-1} ≤ 3^{p-1}$. We show that the conjecture is true if n ≤ 4 and false if n ≥ 5.
Źródło:
Annales Polonici Mathematici; 1995, 62, 2; 173-176
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating experimental activities in Czech chemistry textbooks: A critical analysis
Autorzy:
Špísová, Klára
Rusek, Martin
Powiązania:
https://bibliotekanauki.pl/articles/31342697.pdf
Data publikacji:
2023
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
textbook analysis
experimental activities
chemistry education
analiza podręczników
eksperymenty
aktywność
edukacja chemiczna
Opis:
This study analysed the nature and integration of experimental activities in Czech lower-secondary chemistry textbooks which are currently in use. Focusing on four dominant textbook series (published since 1990’s), and one recently (2019) published and certified, it investigated the offered types of student activities, their cognitive demands, placement in the educational process, and inquiry levels. The findings reveal two distinct groups of textbooks based on the quantity of experimental activities. Some textbooks align with traditional teaching methods, emphasising teacher-led demonstrations, while others attempt a balance between safety concerns and student engagement. However, a general lack of focus on higher-order cognitive skills and inadequate scaffolding for scientific process skills development was found. The results showed future research should investigate the impact of experimental activities on student outcomes, highlighting the need for more modern approaches in chemistry education.
Źródło:
Chemistry-Didactics-Ecology-Metrology; 2023, 28, 1-2; 93-104
2084-4506
Pojawia się w:
Chemistry-Didactics-Ecology-Metrology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of methods of electrical load of permanent magnet synchronous generator for small wind turbines
Analiza sposobów elektrycznego obciążania generatora synchronicznego z magnesami trwałymi w elektrowniach wiatrowych z osiami pionowymi
Autorzy:
Shchur, I.
Rusek, A.
Klymko, V.
Gastołek, A.
Sosnowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1368096.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
Wind turbine
PMSG
electric load control
active rectifier
DC-DC converter
energy efficiency
Elektrownia wiatrowa
regulowanie obciążenia elektrycznego
prostownik aktywny
DC-DC przekształtnik
sprawność
Opis:
W artykule porównano różne sposoby powstawania i regulowania obciążenia elektrycznego generatorów synchronicznych z magnesami trwałymi (PMSG) w elektrowniach wiatrowych małej mocy, o pionowej osi obrotu (VAWT). Krótko opisano metody regulujące siłę elektromotoryczną PMSG. Skupiono się na metodach, w których stosuje się najprostsze trójfazowe PMSG, a regulację ich obciążenia elektrycznego prowadzi się za pomocą przetworników półprzewodnikowych. Sposoby regulowania obciążenia elektrycznego porównano pod względem efektywności energetycznej. Jako kompromis między tymi wskaźnikami zaproponowano mieszany sposób z DC-DC-przekształtnikiem małej mocy, pracującym przy niskich wiatrach i sterowaniem pasywnym – przy dużych wiatrach. Badania prowadzono z użyciem symulacji komputerowej w środowisku Matlab/Simulink.
The article compares the different ways to create and regulate electrical load of synchronous generator with permanent magnets (PMSG) in the low-power wind turbines with vertical axis (VAWT). Briefly describes the methods that allow you to adjust the electromotive force of PMSG. But focuses on such in which the simplest unregulated three phase PMSG is applied, and control of electric load is carried out by means of semiconductor converters. The methods of adjusting the electrical load were relied to each other in terms of complexity and thus of realize cost and of the value and energy efficiency. As a compromise between these indicators a combined method with a low-power DC-DC-converter, which operate at low winds, and passive control –at high winds is proposed. The research was conducted by computer simulation in Matlab/Simulink.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2015, 1, 105; 75-81
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelowanie symulacyjno-komputerowe silnika synchronicznego z magnesami trwałymi na podstawie wyników badań polowych
Simulation modelling of synchronous motor with permanent magnets on the base of results of field research
Autorzy:
Shchur, I.
Rusek, A.
Makarchuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/1369615.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
modelowanie symulacyjno-komputerowe
silnik synchroniczny z magnesami trwałymi
wyniki badań polowych
Opis:
To develop control systems of nonlinear electromechanical systems operated on the base of a synchronous machine with permanent magnets (PMSM), particularly for high-precision dynamic systems, it is necessary to use a mathematical and computer simulation models that adequately reflect such phenomena as real law of induction distribution in the air gap, effect of armature reaction, magnetic saturation of paths of the machine's working flux, iron loss. The best way to account these phenomena is constructing 2D and 3D field models of electrical machines. However, these mathematical models with distributed parameters are complex and not suitable for fast computer simulation. The article suggests to build the simple computer models on the results of previously conducted field research. The study of PMSM with the four characteristic ways of placing of permanent magnets on the rotor is conducted and the spectral distribution of magnetic induction in air gap is estimated. On the basis of the constructed field model of electromagnetic processes in the machine's armature obtained the dependences of self and mutual inductances of phase windings versus the angle of rotor position are obtained. With the use fo the obtained results the simple mathematical model of PMSM was developed, In which the descriptions on phase and transformation to the rotor reference frames are combined. The corresponding computer model in Matlab-Simulink is developed, too. The results of simulation of machine's start obtained by the field modeling and computer simulation showed a good convergence.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2012, 3, 96; 189-195
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the FT-IR/PAS and DRS Methods for Studying Heavy Metal Ions Sorption οn the Inorganic Sorbents
Autorzy:
Rusek, P.
Hubicki, Z.
Wójcik, G.
Debczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/1807755.pdf
Data publikacji:
2009-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
82.80.Kq
81.70.Cv
82.50.-m
Opis:
The scope of this study was the removal of heavy metal ions, ammonium and organic substances by ion exchange from municipal wastewaters. Clinoptilolite, bentonite, and palygorskite are especially interesting in the group of inorganic sorbents because of their specific physico-chemical properties. Specific surface areas and pore distributions were determined for the above sorbents. Sorption kinetics of Zn(II), Cu(II), Ni(II), Pb(II) and ammonium ions in synthetic solutions and wastewaters were investigated on the above sorbents. Ion sorption process was carried out with a static method at various phase contact times. The atomic adsorption spectroscopy method was used for measurements of heavy metal contents. The adsorption process was found to be pH and concentration dependent. The removal mechanism of metal ions was by adsorption and ion exchange processes. The FT-IR photoacoustic spectroscopy method was used to study mechanism of Zn(II), Cu(II), Ni(II), Pb(II) and ammonium ions sorption on the clinoptilolite, bentonite and palygorskite. The spectra of FT-IR/PAS before and after sorption of Zn(II), Cu(II), Ni(II), Pb(II) and ammonium ions were investigated.
Źródło:
Acta Physica Polonica A; 2009, 116, 3; 407-409
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conditions for experimental activities at elementary and high schools from chemistry teachers’ point of view
Autorzy:
Rusek, Martin
Chroustová, Kateřina
Bílek, Martin
Skřehot, Petr A.
Hon, Zdeněk
Powiązania:
https://bibliotekanauki.pl/articles/1430301.pdf
Data publikacji:
2020
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
experimental activity
chemistry teacher
lower-secondary school
general chemistry education
działalność eksperymentalna
nauczyciel chemii
gimnazjum
ogólnokształcące nauczanie chemii
Opis:
School experiments represent a necessary means of subject-matter presentation in chemistry education and are important for chemical (scientific) thinking. Despite being a focus of several texts, a complex view on the experimental activity in chemistry education in Czechia is missing. The results of a questionnaire survey among 466 lower-secondary, lyceum and grammar school teachers focused on types of conducted experiments, their frequency, the place they are conducted. The most frequently used chemicals and sources of inspiration are presented in the paper. The results show that despite experiments’ significant role in education, its occurrence is rather seldom and teacher’s demonstrations prevail over students’ experiments. The list of the most often used chemicals suggests the experiments are mostly focused on inorganic chemistry. These results open further questions regarding occupational safety at schools as an important factor which could also be the reason for such a low representation of experiments in Czech chemistry education.
Źródło:
Chemistry-Didactics-Ecology-Metrology; 2020, 25, 1-2; 93-100
2084-4506
Pojawia się w:
Chemistry-Didactics-Ecology-Metrology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Archiwum” i „repertuar”. Kłopoty z klasyką w szkole podstawowej
“Archive” and “Repertoire”. Problems with Classics in the Primary School
Autorzy:
Rusek, Marta
Powiązania:
https://bibliotekanauki.pl/articles/782942.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
literary classics
reading, canon
literary education in the primary school
A. Fredro Zemsta (Revenge)
B. Prus Katarynka (The Barrel Organ)
Cinderella
renarrations
literature didactics
literatura klasyczna
czytanie
kanon
kształcenie literackie w szkole podstawowej
Zemsta Fredry
Katarynka Prusa
Kopciuszek
renarracje
dydaktyka literatury
Opis:
The article is dedicated to the issue of reception of literary classics by primary school pupils. The fundamental contemporary reception problem consists in the increasing linguistic and cultural strangeness which hampers, and sometimes even prevents independent reading by pupils. The theoretical reflection concerning the ways of preventing the rejection of the classics, as well as overcoming their strangeness is combined with the analysis of particular cases (Cinderella and its contemporary renarrations, The Barrel Organ by B. Prus, and Revenge by A. Fredro). The conclusions emphasize the importance of hermeneutic activities on the part of the teacher, which should precede and boost the act of reading. These are metaphorically referred to as the “gesture of familiarizing the classics”. The “archive” and “repertoire” metaphors introduced in the title are intended to indicate the direction of changes in the manner of presenting the works from the past. Classics should be perceived not as texts from an archive, but as works from the repertoire which are being prepared for staging, i.e. for (re)reading.
prepared for staging, i.e. for (re)reading. Key words: literary classics, reading, canon, literary education in the primary school, A. Fredro Zemsta (Revenge), B. Prus Katarynka (The Barrel Organ), Cinderella, renarrations
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Litterarum Polonarum et Linguae Polonae Pertinentia; 2019, 10, 285; 134-143
2082-0909
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Litterarum Polonarum et Linguae Polonae Pertinentia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anderson Localization of Electromagnetic Waves in Dielectric Media: Model Studies
Autorzy:
Rusek, M.
Orłowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/2044616.pdf
Data publikacji:
2006-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.25.Fx
42.25.Hz
72.10.Fk
78.20.Ci
Opis:
Anderson localization of electromagnetic waves in random arrays of dielectric cylinders confined within a planar metallic waveguide is studied. The disordered dielectric medium is modeled by a system of randomly distributed 2D electric dipoles. An effective theoretical approach based on the method of images is developed. A clear distinction between isolated localized waves (which exist in finite media) and the band of localized waves (which appears only in the limit of the infinite medium) is presented. The Anderson transition emerging in the limit of an infinite medium is observed both in finite size scaling analysis of transmission and in the properties of the spectra of some random matrices. The sound physical interpretation of the obtained results suggests deeper insight into the existing experimental and theoretical work.
Źródło:
Acta Physica Polonica A; 2006, 109, 1; 109-119
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of Argon Clusters in an Intense Laser Pulse: Bloch-Like Hydrodynamic Model
Autorzy:
Rusek, M.
Orłowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/2038167.pdf
Data publikacji:
2004-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
36.40.-c
32.80.Rm
42.50.Hz
07.05.Tp
Opis:
The dynamics of small (<55 atoms) argon clusters ionized by an intense, infrared, femtosecond laser pulse is studied using a Bloch-like hydrodynamic model. Evolution of both free electrons and ions formed in the cluster explosion process is examined. Oscillations of the electron cloud in a rare-gas atomic cluster are described as a motion of a fluid obeying Bloch-like hydrodynamic equations. Our theoretical approach includes all possible ionization mechanisms: tunnel (or field) ionization both by an external laser field, and by an internal field due to the space-charge distribution inside the cluster, as well as electron-impact (or collisional) ionization. The results of our simulations are compared both with experimental findings and with predictions of other theoretical models.
Źródło:
Acta Physica Polonica A; 2004, 106, 1; 3-12
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Explosion of Atom Clusters in a Free-Electron Intense Laser Pulse
Autorzy:
Rusek, M.
Orłowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/2037285.pdf
Data publikacji:
2004-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
36.40.-c
32.80.Rm
42.50.Hz
07.05.Tp
Opis:
The explosion of rare-gas atomic clusters induced by short, intense X-ray pulses generated by a free-electron laser is studied. A numerical approach for an explicitly time-dependent description of small to medium size clusters in 3D is developed within the Thomas-Fermi model. Such an approach, though strongly simplified in comparison to fully quantum-mechanical schemes, is nevertheless expected to yield a qualitatively correct description of the electronic and ionic dynamics of these systems, at a much lower computational cost.
Źródło:
Acta Physica Polonica A; 2004, 105, 5; 425-436
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Free Electrons Generation in the Interaction of Intense Laser Pulses with Atomic Clusters
Autorzy:
Rusek, M.
Orłowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/2041831.pdf
Data publikacji:
2005-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.80.-t
36.40.Gk
52.50.Jm
Opis:
Interaction of argon clusters with intense laser pulses is studied theoretically. Free electrons energy distribution is studied. Differences between infrared and vacuum ultraviolet frequency regimes are pointed out. Clear physical interpretation of the obtained results is given.
Źródło:
Acta Physica Polonica A; 2005, 107, 3; 473-478
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Light Localization in Left-Handed Media
Autorzy:
Rusek, M.
Orłowski, A.
Mostowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2047827.pdf
Data publikacji:
2007-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Nk
41.20.Jb
72.10.Fk
72.15.Rn
Opis:
Localized waves in disordered left-handed materials are studied using a generalized coupled-dipole model. Resonances in an open system consisting of randomly distributed electric and magnetic dipoles are investigated. A new type of long-lived resonance modes localized at the boundary of the system is found. They resemble evanescent waves responsible for a superfocusing phenomenon by a left-handed lens.
Źródło:
Acta Physica Polonica A; 2007, 112, 4; 673-680
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transient and stationary characteristics of a packet buffer modelled as an MAP/SM/1/b system
Autorzy:
Rusek, K.
Janowski, L.
Papir, Z.
Powiązania:
https://bibliotekanauki.pl/articles/330560.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
router interface
Markovian arrival process
semi Markov service time
hidden Markov model
finite buffer queue
packet loss
first passage time
proces Markowiana
model Markowa niejawny
utrata pakietu
Opis:
A packet buffer limited to a fixed number of packets (regardless of their lengths) is considered. The buffer is described as a finite FIFO queuing system fed by a Markovian Arrival Process (MAP) with service times forming a Semi-Markov (SM) process (MAP/SM/1/b in Kendall’s notation). Such assumptions allow us to obtain new analytical results for the queuing characteristics of the buffer. In the paper, the following are considered: the time to fill the buffer, the local loss intensity, the loss ratio, and the total number of losses in a given time interval. Predictions of the proposed model are much closer to the trace-driven simulation results compared with the prediction of the MAP/G/1/b model.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2014, 24, 2; 429-442
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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