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Wyszukujesz frazę "Robaszkiewicz, K." wg kryterium: Autor


Wyświetlanie 1-12 z 12
Tytuł:
The concept of tourism enrichment potential of Witkowo commune concerning Gniezno county area
Autorzy:
Robaszkiewicz, K.
Lisiak, M.
Borowiak, K.
Kanclerz, J.
Powiązania:
https://bibliotekanauki.pl/articles/101600.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
tourism enrichment potential
touristic values
non-touristic values
Witkowo commune
GIS tool
Opis:
Witkowo commune is located in the eastern part of Wielkopolska region at Gniezno county. This is typical agricultural commune with some tourism infrastructure. The aim of the work was to evaluate of an existing tourism potential of Witkowo commune based on comparison analysis of indexes describing its tourism potential and other communes located in administration boundaries of the same county. For this purpose the multidimensional comparison analysis of synthetic measures was performed. Afterwards the concept of tourism potential enrichment was proposed based on aforementioned analysis. The obtained results revealed, that the highest synthetic measure was noted for Witkowo commune, where the highest tourism potential was observed. The lowest level was recorded for Niechanowo commune, which revealed the lowest values almost in every analysed group of indexes. The proposed tourist trail contributes to tourism enrichment potential of Witkowo commune. The trail goes through Powidzko-Bieniszewski Landscape Protected Area. This is in agreement to the goal of tourism management for the development of the tourism at a protected area with considering the protection rules and local features. Simultaneously the tourist trail designation does not disturb ecological balance and create consistent tourist infrastructure.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2016, IV/2; 1373-1383
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stable and Metastable Phases in the Atomic Limit of the Extended Hubbard Model with Intersite Density-Density Interactions
Autorzy:
Kapcia, K.
Robaszkiewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/1426712.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Fd
71.45.Lr
64.60.My
64.75.Gh
71.10.Hf
Opis:
We have studied a simple effective model of charge ordered insulators. The tight binding Hamiltonian consists of the effective on-site interaction U and the intersite density-density interaction $W_{ij}$ (both: nearest-neighbor and next-nearest-neighbor). In the analysis of the phase diagrams and thermodynamic properties of this model we have adopted the variational approach, which treats the on-site interaction term exactly and the intersite interactions within the mean-field approximation. Our investigations of the general case (as a function of the electron concentration n) have shown that the system exhibits various critical behaviors including among others bicritical, tricritical, critical-end, and isolated critical points. In this report we concentrate on the metastable phases and transitions between them. One finds that the first- and second order transitions between metastable phases can exist in the system. These transitions occur in the neighborhood of first as well as second order transitions between stable phases. For the case of on-site attraction the regions of metastable homogeneous phases occurrence inside the ranges of phase separated states stability have been also determined.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1029-1031
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charge Orderings and Phase Separations in the Atomic Limit of the Extended Hubbard Model with Intersite Density-Density Interactions
Autorzy:
Kapcia, K.
Kłobus, W.
Robaszkiewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/1537054.pdf
Data publikacji:
2010-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Fd
71.45.Lr
64.75.Gh
71.10.Hf
Opis:
A simple effective model of charge ordered insulators is studied. The tight binding Hamiltonian consists of the effective on-site interaction U and the intersite density-density interactions $W_{ij}$ (both: nearest-neighbour and next-nearest neighbour). In the analysis of the phase diagrams we have adopted the variational approach, which treats the on-site interaction term exactly and the intersite interactions within the mean-field approximation. The phase separated states have not been taken into account in previous analyses. Our investigations of two cases of the on-site interaction: attraction (U/(- $W_{Q}$) = - 10) and repulsion (U/(- $W_{Q}$) = 1.1) show that, depending on the values of the next-nearest neighbour attraction, the system can exhibit not only homogeneous phases: charge ordered and nonordered, but also various phase separated states (charge ordered-nonordered, charge ordered-charge ordered).
Źródło:
Acta Physica Polonica A; 2010, 118, 2; 350-352
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Orderings and Phase Separations in the Zero-Bandwidth Limit of the Extended Hubbard Model with Intersite Magnetic Interactions
Autorzy:
Kłobus, W.
Kapcia, K.
Robaszkiewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/1537056.pdf
Data publikacji:
2010-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Fd
75.10.-b
75.30.Gw
64.75.Gh
71.10.Hf
Opis:
A simple effective model for a description of magnetically ordered insulators is analysed. The tight binding Hamiltonian consists of the effective on-site interaction (U) and intersite magnetic exchange interactions $(J^{z}, J^{xy})$ between nearest neighbours. The phase diagrams of this model have been determined within the variational approach, which treats the on-site interaction term exactly and the intersite interactions within the mean-field approximation. We show that, depending on the values of interaction parameters and the electron concentration, the system can exhibit not only homogeneous phases: (anti-)ferromagnetic $(F_α)$ and nonordered (NO), but also phase separated states $(PS_α: F_α-NO)$.
Źródło:
Acta Physica Polonica A; 2010, 118, 2; 353-355
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interplay between Charge and Magnetic Orderings in the Zero-Bandwidth Limit of the Extended Hubbard Model for Strong On-Site Repulsion
Autorzy:
Kapcia, K.
Kłobus, W.
Robaszkiewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/1426720.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Fd
71.45.Lr
75.30.Fv
64.75.Gh
71.10.Hf
Opis:
A simple effective model of charge ordered and (or) magnetically ordered insulators is studied. The tight binding Hamiltonian analyzed consists of (i) the effective on-site interaction U, (ii) the intersite density-density interaction W and (iii) intersite magnetic exchange interaction $J^{z}$ (or $J^{xy}$) between nearest-neighbors. The intersite interaction are treated within the mean-field approximation. One shows that the systems considered can exhibit very interesting multicritical behaviors, including among others bicritical, tricritical, tetracritical and critical end points. The analysis of the model has been performed for an arbitrary electron concentration as well as an arbitrary chemical potential in the limit of strong on-site repulsion (U → +∞). The phase diagrams obtained in such a case are shown to consist of at least 9 different states, including four homogeneous phases: nonordered (NO), ferromagnetic (F), charge ordered (CO), ferrimagnetic (intermediate, I) and five types of phase separation: NO-NO, F-NO, F-F, CO-F, CO-I.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1032-1034
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some Exact Results for the Zero-Bandwidth Extended Hubbard Model with Intersite Charge and Magnetic Interactions
Autorzy:
Kapcia, K.
Kłobus, W.
Robaszkiewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/1385252.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Fd
71.10.-w
71.10.Hf
71.45.Lr
75.30.Fv
Opis:
The extended Hubbard model in the zero-bandwidth limit is studied. The effective Hamiltonian consists of (i) on-site U interaction, (ii) intersite density-density interaction W, and (iii) Ising-like magnetic exchange interaction J between the nearest-neighbors. We present rigorous (and analytical) results obtained within the transfer-matrix method for 1D chain in two particular cases: (a) W=0 and n=1; (b) U → +∞ and n=1/2 (W ≠ 0, J ≠ 0). We obtain the exact formulae for the partition functions which enables to calculate thermodynamic properties such as entropy, specific heat (c), and double occupancy per site. In both cases the system exhibits an interesting temperature dependence of c involving a characteristic two-peak structure. There are no phase transitions at finite temperatures and the only transitions occur in the ground state.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 284-286
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Phase Diagram of the Zero-Bandwidth Extended Hubbard Model with Intersite Magnetic Interactions for Strong On-Site Repulsion Limit
Autorzy:
Murawski, S.
Kapcia, K.
Pawłowski, G.
Robaszkiewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/1426734.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Fd
75.30.Fv
64.75.Gh
71.10.Hf
Opis:
In this report we have analyzed a simple effective model for a description of magnetically ordered insulators. The Hamiltonian considered consists of the effective on-site interaction (U) and the intersite Ising-like magnetic exchange interaction (J) between nearest neighbors. For the first time the phase diagrams of this model have been determined within Monte Carlo simulation on 2D-square lattice. They have been compared with results obtained within variational approach, which treats the on-site term exactly and the intersite interactions within mean-field approximation. We show within both approaches that, depending on the values of interaction parameters and the electron concentration, the system can exhibit not only homogeneous phases: (anti-)ferromagnetic (F) and nonordered (NO), but also phase separated states (PS: F-NO).
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1035-1037
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some Properties of Two-Dimensional Extended Repulsive Hubbard Model with Intersite Magnetic Interactions - A Monte Carlo Study
Autorzy:
Murawski, S.
Kapcia, K.
Pawłowski, G.
Robaszkiewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/1374074.pdf
Data publikacji:
2014-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Fd
75.10.-b
75.30.Fv
64.75.Gh
71.10.Hf
Opis:
In this paper the two-dimensional extended Hubbard model with intersite magnetic Ising-like interaction in the atomic limit is analyzed by means of the classical Monte Carlo method in the grand canonical ensemble. Such an effective simple model could describe behavior of insulating (anti)ferromagnets. In the model considered the Coulomb interaction (U) is on-site and the magnetic interactions in z-direction (J>0, antiferromagnetic) are restricted to nearest-neighbors. Simulations of the model have been performed on a square lattice consisting of N=L× L=400 sites (L=20) in order to obtain the full phase diagram for U/(4J)=1. Results obtained for on-site repulsion (U>0) show that, apart from homogeneous non-ordered (NO) and ordered magnetic (antiferromagnetic, AF) phases, there is also a region of phase separation (PS: AF/NO) occurrence. We present a phase diagram as well as some thermodynamic properties of the model for the case of U/(4J)=1 (and arbitrary chemical potential and arbitrary electron concentration). The AF-NO transition can be second-order as well as first-order and the tricritical point occurs on the diagram.
Źródło:
Acta Physica Polonica A; 2014, 126, 4a; A-110-A-114
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monte Carlo Study of Phase Separation in Magnetic Insulators
Autorzy:
Murawski, S.
Kapcia, K.
Pawłowski, G.
Robaszkiewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/1385243.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Fd
75.10.-b
75.30.Fv
64.75.Gh
71.10.Hf
Opis:
In this work we focus on the study of phase separation in the zero-bandwidth extended Hubbard with nearest-neighbors intersite Ising-like magnetic interactions J and on-site Coulomb interactions U. The system has been analyzed by means of the Monte Carlo simulations (in the grand canonical ensemble) on two-dimensional square lattice (with N = L × L = 400 sites) and the results for U/(4J) = 2 as a function of chemical potential and electron concentration have been obtained. Depending on the values of interaction parameters the system exhibits homogeneous (anti-)ferromagnetic or non-ordered phase as well as phase separation state. Transitions between homogeneous phases (i.e. antiferromagnetic-non-ordered transitions) can be of first or second order and the tricritical point is also present on the phase diagrams. The electron compressibility K is an indicator of the phase separation and that quantity is of particular interest of this paper.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 281-283
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pilotażowe badania nad wykorzystaniem zdjęć lotniczych z bsp do oceny stanu zdrowotnego świerka Picea abies Karst.
The pilot study on the use of aerial photographs from bmp to assess the state health of spruce Picea abies Karst.
Autorzy:
Robaszkiewicz, A.
Bedkowski, K.
Buraczyk, W.
Szymanski, P.
Kwasny, L.
Powiązania:
https://bibliotekanauki.pl/articles/881018.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
lesnictwo
drzewostany swierkowe
swierk pospolity
Picea abies
stan zdrowotny drzew
monitoring
systemy bezzalogowe
samoloty bezzalogowe
teledetekcja
zdjecia lotnicze
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2014, 16, 4[41]
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fotogrametryczny monitoring drzewostanu dębu bezszypułkowego (Quercus petraea Liebl.) w rezerwacie "Zimna Woda" w Rogowie
Photogrammetric monitoring of sessile oak (Quercus petraea Liebl.) stand in the reserve "Zimna Woda" in Rogow
Autorzy:
Szymanski, P.
Robaszkiewicz, A.
Bedkowski, K.
Brach, M.
Kwasny, L.
Powiązania:
https://bibliotekanauki.pl/articles/881241.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
lesnictwo
drzewostany debowe
fotogrametria
teledetekcja
rezerwaty przyrody
rezerwat Zimna Woda
drzewa lesne
dab bezszypulkowy
Quercus petraea
stan zdrowotny drzew
monitoring
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2014, 16, 4[41]
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Brachypodium distachyon – a model plant to study grass genome structure, dynamics and evolution
Autorzy:
Idziak, D.
Hasterok, R.
Betekhtin, A.
Borowska-Zuchowska, N.
Braszewska-Zalewska, A.
Chwialkowska, K.
Gorkiewicz, R.
Kus, A.
Kwasniewska, J.
Kwasniewski, M.
Robaszkiewicz, E.
Siwinska, D.
Wolny, E.
Chrominski, K.
Tkacz, M.
Powiązania:
https://bibliotekanauki.pl/articles/951271.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Brachypodium distachyon
model plant
grass
genome structure
Expressed Sequence Tag programme
fluorescent in situ hybridization
chromosome painting
DNA methylation
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-12 z 12

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