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Wyświetlanie 1-15 z 371
Tytuł:
Doskonalenie procesu projektowania melioracji
Autorzy:
Ilnicki, P.
Lewandowski, B.J.
Los, M.J.
Powiązania:
https://bibliotekanauki.pl/articles/810096.pdf
Data publikacji:
1989
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
melioracja
odwodnienie
nawodnienie
siedliska wodne
hydrogeologia
gleboznawstwo
hydrologia
sieci drenarskie
badania geomorfologiczne
uzytki zielone
bilans wodny
efektywnosc ekonomiczna
deszczownie
ekspertyzy
zagospodarowanie pomelioracyjne
ochrona srodowiska
prace projektowe
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1989, 375
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uwagi na temat miejsca powstania oraz autorstwa Quaestio- nes disputatae super octo libros Physicorum Aristotelis zawartych w rkps. BJ 688
New Propositions Concerning the Place of Origin and the Authorship of the Quaestio- nes disputatae super octo libros Physicorum Aristotelis Contained in MS no. BJ 688
Autorzy:
Grzesik, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/2106890.pdf
Data publikacji:
1990
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Opis:
Most present-day Polish medievalists consider the Quaestiones disputatae, contained in MS no. BJ 688 of the Jagellonian Library in Cracow, to be a work written by Andrew Wężyk OP alias „Magister Serpens”. Some, as for instance M. Markowski, even call it a Cracovian commentary. The author of this paper traces the history of the question of authorship and place of origin of these Quaestiones disputatae. Recent research advocates a revision of opinions as regards these two problems. Firstly, Cracow should no longer be considered as the place of origin of this work. Ample evidence stems from the text of this work, proving that it was written not in Cracow, but in Prague. Secondly, there is some doubt as to how one should treat the heading on f. 2r which, as some scholars have remarked, is an adscription and cannot therefore be considered as part of the original text of this work (W. Wisłocki, M. Kowalczyk, M. Zwiercan). Until now, this heading seems to have been accepted as the title of the work and, it being treated as such, has resulted in the doubtful interpretations of these problems in the past. Yet although a later addition to the work, the heading on f. 2r gives us a clue as to the true role of the alleged author of this work: the expression „magistri Serpentis editionis” found in this heading, as well as numerous editorial signs in the text of the work all dating from the same epoch as the heading, suggest that the person mentioned in it was not so much the author of the Quaestiones disputatae BJ 688 but rather their editor. The paper concludes by proposing that one should refrain from using the adscription on f. 2r of this work as its title. Until more data is available regarding the authorship of this work, it should be known under the following title: Quaestiones disputatae, quae cuidam magistro Serpenti attribuuntur.
Źródło:
Roczniki Filozoficzne; 1990, 37-38, 1; 145-152
0035-7685
Pojawia się w:
Roczniki Filozoficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron Annihilation in and Adiabatic Compressibility of Water-Organic Solutions. The System Water-Dimethylsulfoxide
Autorzy:
Jerie, K.
Baranowski, A.
Rozenfeld, B.
Jeżowska-Trzebiatowska, B.
Gliński, J.
Powiązania:
https://bibliotekanauki.pl/articles/1887375.pdf
Data publikacji:
1991-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.25.Em
78.70.Bj
Opis:
The results of positron lifetime and ultrasonic velocity measurements in dilute aqueous dimethylsulfoxide (DMSO) solutions show the usual extreme characteristic for polar organic solutes. The results obtained suggest that strong structural changes occur in the system, in the region of low DMSO concentrations. Liquid clathrate hydrates forming in the system are supposed, with unusual stoichiometry and untypical geometry of the hydrates.
Źródło:
Acta Physica Polonica A; 1991, 79, 4; 507-515
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron Annihilation Study of Structural Relaxation in Amorphous Fe$\text{}_{40}$Ni$\text{}_{40}$B$\text{}_{20}$ Alloy
Autorzy:
Pavlovský, J.
Powiązania:
https://bibliotekanauki.pl/articles/1887646.pdf
Data publikacji:
1991-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
78.70.Bj
Opis:
Structural relaxation of amorphous Fe$\text{}_{40}$Ni$\text{}_{40}$B$\text{}_{20}$ alloy has been studied by the method of angular correlation of positron annihilation. Inexpressive changes of the spectra after the annealing for 2 x 10$\text{}^{3}$ min at 473 K suggest some changes in topological order. The relatively low sensitivity of positron annihilation to the structural relaxation of the amorphous alloy is probably caused by the high density of vacancy-like defects in the alloy.
Źródło:
Acta Physica Polonica A; 1991, 79, 5; 751-753
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron Annihilation in and Compressibility of Water-Organic Solutions. The System Water-Pyridine
Autorzy:
Jerie, K.
Baranowski, A.
Gliński, J.
Jeżowska-Trzebiatowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/1920939.pdf
Data publikacji:
1992-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.25.Em
78.70.Bj
Opis:
The results of positron lifetime and ultrasonic velocity measurements in dilute aqueous pyridine (PYR) solutions show unusual changes in ultrasonic, annihilation data in function of pyridine concentration. The results obtained suggest that strong structural changes occur in the system, in the region of low pyridine concentrations. Liquid clathrate hydrates forming in the system are supposed with unusual stoichiometry and untypical geometry. They are supposed to be very short-living and/or unstable.
Źródło:
Acta Physica Polonica A; 1992, 82, 3; 471-479
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Defect Recovery in α-Fe e$\text{}^{-}$-irradiated at 300 K
Autorzy:
Dai, G. H.
Li, X. H.
Moser, P.
Moya, G.
Van Duysen, J. C.
Powiązania:
https://bibliotekanauki.pl/articles/1928989.pdf
Data publikacji:
1993-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.70.Bv
61.80.Fe
78.70.Bj
Opis:
Defect annealing recovery has been studied, by measuring positron lifetime spectra, in high-purity α-iron irradiated at 300 K with 3 MeV electrons to a fluency of 7 × 10$\text{}^{19}$ cm$\text{}^{-2}$. Vacancy clusters containing 6-10 single vacancies were observed immediately after irradiation during which they were possibly forming (the so-called "irradiation annealing"). With increasing temperature, the agglomerates continually grow in size at the expense of their concentration, giving rise to the formation of microvoids (> 15 vacancies). Also present were other types of defects, probably immobile vacancies trapped by impurity (e.g. carbon) atoms and dislocation/loops generated presumably from collapse of voids during the relatively high dose irradiation and/or the annealing. The immobile vacancies eventually became movable at around 350 K, supplying the growing clusters and thus leading to a stabilization in their concentration till around 500 K. Between 500 and 700 K, microvoids gradually evaporated, but the dislocation-associated defects were able to survive annealing at temperatures as high as 700 K. The void size and concentration and their evolution have been evaluated on the basis of both the to date theoretical and experimental studies. The temperature dependence was also, observed of positron trapping into vacancy agglomerates of various sizes.Za
Źródło:
Acta Physica Polonica A; 1993, 83, 3; 277-286
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Densities of Valence Electrons in Simple Metals Effective with Respect to Electron-Positron Correlations
Autorzy:
Kontrym-Sznajd, G.
Rubaszek, A.
Powiązania:
https://bibliotekanauki.pl/articles/1929097.pdf
Data publikacji:
1993-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
71.20.-b
Opis:
The influence of the electron-positron interactions on the momentum density of annihilation quanta in real metals is discussed. The role of momentum dependence of two-particle electron-positron correlations is set forth. The effective densities describing electron-positron correlations are presented for valence electrons in simple metals.
Źródło:
Acta Physica Polonica A; 1993, 83, 3; 333-337
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electroni-Positron Scattering in Real Metals
Autorzy:
Boroński, E.
Daniuk, S.
Stachowiak, H.
Powiązania:
https://bibliotekanauki.pl/articles/1928926.pdf
Data publikacji:
1993-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
71.60.+z
Opis:
The purpose of the paper is to point at the importance of some detailed studies of electron-positron scattering in real metals using wave functions obtained from band structure calculations. In this work some preliminary investigations of the matrix elements of electron-positron scattering, e.g. the transitions from occupied to non-occupied states close to the Fermi surface are presented. One can observe that for s → s transitions of the positron (s, p are orbital quantum numbers) electrons do not change their orbital quantum numbers but for s → p transitions of the positron, electron quantum numbers change by unity.
Źródło:
Acta Physica Polonica A; 1993, 83, 3; 255-260
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electronic Constitution of Paramagnetic 3d Complexes and Positronium Conversion Rate Constants
Autorzy:
Fantola Lazzarini, A. L.
Lallarini, E.
Powiązania:
https://bibliotekanauki.pl/articles/1929063.pdf
Data publikacji:
1993-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
36.10.Dr
61.66.Fn
71.70.Ch
78.40.Dw
78.70.Bj
Opis:
The rate constants, k$\text{}_{SE}$, of ortho- into para-positronium spin conversion reactions promoted by paramagnetic 3d complexes may be correlated with their electronic constitution as it is described by the spin-orbit coupling and interelectronic repulsion parameters. The correlation is explained in terms of unpaired metal-electron delocalization towards the complex boundaries.
Źródło:
Acta Physica Polonica A; 1993, 83, 3; 297-302
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Solid-Liquid Phase Transition for SnIn Alloys by the Positron Annihilation Method
Autorzy:
Chabik, S.
Rudzińska, W.
Szuszkiewicz, M.
Szymański, C.
Powiązania:
https://bibliotekanauki.pl/articles/1928947.pdf
Data publikacji:
1993-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.Dv
61.72.Cc
78.70.Bj
Opis:
The monovacancy formation energy in Sn-17 wt.% In and Sn-32 wt.% In was determined on the basis of the temperature dependence of the peak counting rate for these alloys. A sudden increase in the counting rate was observed between solidus and liquidus temperature. This phenomenon is connected with the formation of large defects acting as positron traps.
Źródło:
Acta Physica Polonica A; 1993, 83, 3; 261-265
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of Extracting Electron-Positron Enhancement Factors from Experimental ACAR Data
Autorzy:
Kontrym-Sznajd, G.
Rubaszek, A.
Powiązania:
https://bibliotekanauki.pl/articles/1929100.pdf
Data publikacji:
1993-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
71.20.-b
Opis:
Methods of extracting the full shape of the electron-positron momentum density from experimental angular correlation of positron annihilation radiation curves are discussed. The proposed analysis of experimental data allows more reliable verification of the form of electron-positron enhancement factors near the Fermi surface in simple metals.
Źródło:
Acta Physica Polonica A; 1993, 83, 3; 339-344
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron Annihilation in Chloropolystyrenes
Autorzy:
Baranowski, A.
Dębowska, M.
Jerie, K.
Mirkiewicz, G.
Rudzińska-Girulska, J.
Sikorski, R. T.
Powiązania:
https://bibliotekanauki.pl/articles/1928863.pdf
Data publikacji:
1993-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.60.+z
78.70.Bj
81.20.Sh
82.30.Hk
Opis:
Results of angular correlation of annihilation radiation and positron annihilation lifetime measurements are presented for atactic polystyrene and chloropolystyrenes. The inhibition of positronium formation follows the chlorine introduction as the decrease in intensities of the narrow component in angular correlation of annihilation radiation curves and of the longest-lived component in positron annihilation lifetime spectra prove. In general, the chlorine "activity" towards positrons seems to depend on its position in the polymer structure. The annihilation rate distribution as well as the radius and volume distributions of free-volume sites where positronium is assumed to be formed obtained with the use of CONTIN program for the raw sample in the 2nd series are given additionally.
Źródło:
Acta Physica Polonica A; 1993, 83, 3; 239-249
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron Annihilation in Helium Charged Ni Samples
Autorzy:
Pająk, J.
Rozenfeld, B.
Powiązania:
https://bibliotekanauki.pl/articles/1929108.pdf
Data publikacji:
1993-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
Opis:
The angular correlation curves of annihilation quanta and isochronal annealing curves for the plastically deformed nickel samples charged with helium have been measured. The results indicate that helium is effectively trapped at crystal lattice defects and is released from them at the temperature below 350 K.
Źródło:
Acta Physica Polonica A; 1993, 83, 3; 371-374
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 371

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