Temat: BR - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fitting the long-range order of a decagonal quasicrystal
Autorzy:: Chodyń, M.
Kuczera, P.
Wolny, J.
Powiązania:: https://bibliotekanauki.pl/articles/1075925.pdf
Data publikacji:: 2016-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
Opis:: The generalized Penrose tiling is an infinite set of decagonal tilings. It is constructed with the same rhombs (thick and thin) as the conventional Penrose tiling, but its long-range order depends on the so-called shift parameter sın łangle 0,1). The formula for structure factor, calculated within the average unit cell approach, works in physical space only and is directly dependent on the s parameter. It allows to straightforwardly change the long-range order of the refined structure just by changing the s parameter and keeping the tile decoration unchanged. The possibility and viability of using the shift as one of the refinement parameters during structure refinement was tested for a numerically generated simple binary decagonal quasicrystal.
Źródło:: Acta Physica Polonica A; 2016, 130, 4; 845-847
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Multidimensional "Paperfolding" Structures - Three and Four Dimensions
Autorzy:: Ben-Abraham, S.
Flom, D.
Richman, R.
Shapira, D.
Powiązania:: https://bibliotekanauki.pl/articles/1202904.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
Opis:: We recapitulate our previously developed recursive algorithm for creating "paperfolding" structures in arbitrary dimensions. Here we explain and apply it specifically to three and four dimensions. We visualize the results by suitable projections. We also explicitly enumerate the number of "folds" in the first four generations of the recursion. We conjecture (without proof) that the Fourier spectrum of the structures is pure point (the Bragg peaks).
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 435-437
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Direct and Reciprocal Space Properties of the Generalized Penrose Tiling
Autorzy:: Chodyń, M.
Kuczera, P.
Wolny, J.
Powiązania:: https://bibliotekanauki.pl/articles/1202908.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
Opis:: We have constructed a generalized Penrose tiling by the cut-and-project method and compared its structure with that of the regular Penrose tiling. We derived the structure factor of the generalized Penrose tiling and applied it to calculate the diffraction pattern of a non-decorated structure.
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 442-445
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Finite Element Method for Static Problems of Cubic Quasicrystals
Autorzy:: Yang, L.
He, F.
Gao, Y.
Powiązania:: https://bibliotekanauki.pl/articles/1202985.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
Opis:: We put forward a finite element method for static problems of cubic quasicrystals by variation of a suitable general potential functional. As an example we study a quasicrystal column containing a penny-shaped crack. The comparison with analytical results shows that the precision and efficiency of the numerical solution are satisfactory. The procedure can be used to solve more complicated boundary value problems and can be extended towards more sophisticated methods of crack tip loading analysis.
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 471-473
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Topological Bragg Peaks and How They Characterise Point Sets
Autorzy:: Kellendonk, J.
Powiązania:: https://bibliotekanauki.pl/articles/1203066.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
Opis:: The positions of the Bragg peaks in point set diffraction show up as eigenvalues of a dynamical system. Topological Bragg peaks arise from topological eigenvalues and determine the torus parametrisation of the point set. We will discuss how qualitative properties of the torus parametrisation characterise the point set.
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 497-500
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Inhomogeneous Electronic Localization in Icosahedral Quasicrystals
Autorzy:: Prekul, A.
Schegolikhina, N.
Shalaeva, E.
Powiązania:: https://bibliotekanauki.pl/articles/1203241.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
Opis:: Experimental results indicating that the electronic inhomogeneity may be a fundamental property of icosahedral quasicrystals and their approximants are presented.
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 556-559
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Inverse Hall-Petch Like Mechanical Behaviour in Nanophase Al-Cu-Fe Quasicrystals: A New Phenomenon
Autorzy:: Mukhopadhyay, N.
Ali, F.
Scudino, S.
Samadi Khoshkhoo, M.
Stoica, M.
Srivastava, V.
Uhlenwinkel, V.
Vaughan, G.
Suryanarayana, C.
Eckert, J.
Powiązania:: https://bibliotekanauki.pl/articles/1373423.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
Opis:: The structural and mechanical stability of quasicrystals are important issues due to their potential for possible applications at high temperatures and stresses. The aim of the present work is, therefore, to review the earlier works on conventional crystalline and quasicrystalline materials and also to report the results and the analysis on the Hall-Petch and inverse Hall-Petch like behavior of nanoquasicrystalline $Al_{62.5}Cu_{25}Fe_{12.5}$ alloys. It was observed that, at large grain sizes, the hardness increases with decreasing grain size, exhibiting the conventional Hall-Petch relationship, whereas for smaller grains, inverse Hall-Petch behavior was identified. The inverse Hall-Petch behavior in the nanoquasicrystalline phase could be attributed to thermally activated shearing of the grain boundaries, leading to grain boundary sliding in nanostructures of quasicrystalline grains. These results were analyzed based on the dislocation pile-up model as well as the grain boundary shearing models applicable to nanomaterials.
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 543-548
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Surface Decorations of Al-Cu-Fe and Al-Cu-Co Single Quasicrystals
Autorzy:: Surowiec, M.
Bogdanowicz, W.
Krawczyk, J.
Sozańska, M.
Powiązania:: https://bibliotekanauki.pl/articles/1373609.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
Opis:: We studied surface decorations of faceted icosahedral Al-Cu-Fe and decagonal Al-Cu-Co single quasicrystals by the scanning electron microscopy using primary and secondary electrons. Both types of single quasicrystals exhibited decorations on their facets, however the character of the decorations was totally different. Three kinds of decorations has been developed. On icosahedral $Al_{60}Cu_{26}Fe_{14}$ quasicrystals we found three kinds of decorations: cellular, cavity type and fractal-like. There was no evident difference in chemical composition between the inner dodecahedra and the decorations of all types. Surface decorations found on decagonal $Al_{73.5}Cu_{17.5}Co_9$ quasicrystals formed a kind of irregular dendritic stars on the separate bright islands.
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 597-598
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Similar Submodules and Coincidence Site Modules
Autorzy:: Zeiner, P.
Powiązania:: https://bibliotekanauki.pl/articles/1373706.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
Opis:: We consider connections between similar sublattices and coincidence site lattices and, more generally, between similar submodules and coincidence site modules of general (free) ℤ-modules in $ℝ^d$. In particular, we generalise results obtained by S. Glied and M. Baake on similarity and coincidence isometries of lattices and certain lattice-like modules called S-modules. An important result is that the factor group OS(M)/OC(M) is Abelian for arbitrary ℤ-modules M, where OS(M) and OC(M) are the groups of similar and coincidence isometries, respectively. In addition, we derive various relations between the indices of coincidence site lattices and their corresponding similar sublattices.
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 641-644
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Nutritional profile and oxidative stress in adolescent soccer players
Autorzy:: Milani Guissoni, Francine
Deminice, Rafael
Payão Ovidio, Paula
Zangiacomi Martinez, Edson
Jordao, Alceu Afonso
Mialich, Mirele S.
Powiązania:: https://bibliotekanauki.pl/articles/1030959.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:: alceu@fmrp.usp.br
Opis:: High-intensity exercise increases reactive oxygen species formation, which in excess may cause oxidative stress. We assessed nutritional status and exercise-induced oxidative stress in 20 adolescent male soccer players (age: 15-17). Participants were divided into two teams for a 60-minute friendly match and evaluated immediately before (Pre-match), 30 minutes after (Post-match I) and 24 hours after (Post-match II) the game. All players recorded a 3-day dietary intake. Biochemical tests were performed for lipid profile, muscle damage (creatinine and creatinine kinase [CK]) and oxidative stress (thiobarbituric acid-reactive substances [TBARS], protein carbonyls [PC], reduced glutathione [GSH], and vitamins E, C, and A). CK and creatinine were significantly elevated at Post-match I (p < 0.01), returning to baseline at Post-match II. Vitamins E, C and A were significantly elevated at Post-match I (p < 0.01), but only vitamins E and A remained high at Post-match II. TBARS showed no significant changes. GSH showed a significant decrease (p < 0.01) and PC showed a slight but significant increase (p < 0.01) at Post-match II. The recruitment of non-enzymatic antioxidants prevented lipid peroxidation, but dietary and especially endogenous defence responses were insufficient to prevent protein oxidation. Proper nutrition is essential to improve the activity of the antioxidant defence system, preventing exercise-induced oxidative stress.
Źródło:: Central European Journal of Sport Sciences and Medicine; 2020, 32, 4; 51-59
2300-9705
2353-2807
Pojawia się w:: Central European Journal of Sport Sciences and Medicine
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "BR" wg kryterium: Temat

Źródło danych

Dostawca treści

Podbaza

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język