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Wyszukujesz frazę "González, J." wg kryterium: Autor

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Wyświetlanie 1-15 z 72
Tytuł:
Wspólnoty tzeltal-tzotziles a kształtowanie przestrzeni regionalnych w Meksyku
Tzeltal-Tzotzil communities and the formation of regional spaces in Mexico
Autorzy:
Gonzalez Martinez, J.R.
Powiązania:
https://bibliotekanauki.pl/articles/2085432.pdf
Data publikacji:
1994
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Opis:
The article presents some aspects of the culture Tzeltal-Tzotzil of the Chiapas Highlands and the way it manifests itself in the conformation and use of the regional space. One of its more visible features is the toltec principle of duality, according to which the dual deity manifests its presence in all the objects, natural phenomena, in the mesoamerican nations' concepts of the world and of life. The catholic believes brought by missionaries were integrated into the logic of the principle of duality, in the way that the old Mayan believs system adopted some elements of Spanish culture, analyzing them according to its own vision of the world, fulfilling the requirements imposed by the colonial govemment. From that moment on, the Indian culture analyzed here undergoes the constant process of adaptation in which all the elements coming from non-Indian society (sociedad ladina) are being integrated or interpreted according to the dual logic giving as a result the cultural complex transposed in the conformation of the society and space. It also works as an element of the strategy of social reproduction - and because of tha t, the vision of the society and the culture of the Tzeltal-Tzotzil maintains its vitality in the conditions of the changing social development process.
Źródło:
Prace i Studia Geograficzne; 1994, 15; 103-118
0208-4589
Pojawia się w:
Prace i Studia Geograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A convolution operation for a distributional Hankel transformation
Autorzy:
J. Betancor, J.
González, B.
Powiązania:
https://bibliotekanauki.pl/articles/1288540.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Hankel transformation
convolution
distributions
Bessel functions
Opis:
We investigate the Hankel transformation and the Hankel convolution on new spaces of generalized functions.
Źródło:
Studia Mathematica; 1995-1996, 117, 1; 57-72
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advantages of application of the backscattered electron scanning images in the determination of soil structure and soil constituents
Autorzy:
Wierzchos, J.
Garcia-Gonzalez, M.T.
Ascaso, C.
Powiązania:
https://bibliotekanauki.pl/articles/25149.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil structure
backscattered electron scanning image
soil constituent
microanalytical technique
soil component
Źródło:
International Agrophysics; 1995, 09, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Current Annealings and Magnetoimpedance in Co-Fe Amorphous Ribbons
Autorzy:
González, J.
Domínguez, L.
Blanco, J. M.
Aragoneses, P.
Valenzuela, R.
Powiązania:
https://bibliotekanauki.pl/articles/1956111.pdf
Data publikacji:
1997-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.Nt
75.50.Kj
Opis:
Amorphous ribbons of composition (Co$\text{}_{0.95}$Fe$\text{}_{0.05}$)$\text{}_{100-x}$Si$\text{}_{0.4x}$ B$\text{}_{0.6x}$, with x=25 and 30 were prepared by the melt-spinning technique. Current annealings at 600 mA were performed for annealing times between 15 s and 60 min. The magnetoimpedance response was investigated by submitting the ribbons to ac currents at frequencies in the 10-200 kHz range, with amplitudes between 1 and 15 mA (rms), and measuring their voltage response. The observed results show that a transverse anisotropy is induced by the thermal treatments, which can be evaluated by means of the magnetoimpedance effect. Due to its lower Curie temperature, the x=30 ribbons exhibited lower sensibility to the current annealings.
Źródło:
Acta Physica Polonica A; 1997, 91, 2; 451-454
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Invariants and flow geometry
Autorzy:
González-Dávila, J.
Vanhecke, L.
Powiązania:
https://bibliotekanauki.pl/articles/965888.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
flow model spaces
normal, contact and curvature homogeneous flows
invariants and characterizations of special Riemannian manifolds
flows generated by a unit Killing vector field
Opis:
We continue the study of Riemannian manifolds (M,g) equipped with an isometric flow $ℱ_ξ$ generated by a unit Killing vector field ξ. We derive some new results for normal and contact flows and use invariants with respect to the group of ξ-preserving isometries to charaterize special (M,g,$ℱ_ξ$), in particular Einstein, η-Einstein, η-parallel and locally Killing-transversally symmetric spaces. Furthermore, we introduce curvature homogeneous flows and flow model spaces and derive an algebraic characterization of Killing-transversally symmetric spaces by using the curvature tensor of special flow model spaces. All these results extend the corresponding theory in Sasakian geometry to flow geometry.
Źródło:
Colloquium Mathematicum; 1999, 81, 1; 33-50
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dipolar Contributions to Magnetoelastic Energy of Crystal Grains with Interfaces
Autorzy:
Szumiata, T.
Żuberek, R.
Szymczak, H.
Gonzalez, J.
Powiązania:
https://bibliotekanauki.pl/articles/2013177.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.80.+q
68.90.+g
78.66.Jg
Opis:
The magnetic anisotropy and magnetostriction in nanocrystalline grains in non-magnetic or magnetic matrix (nanoparticles or nanocrystalline materials) differ from their bulk properties. The interactions between atoms at the interface play the important role in these magnetic properties. In this paper the magnetic dipolar contribution to magnetostriction energy has been calculated for spherical crystal grains (of bcc and fcc symmetry) with interface layer of atoms possessing different magnetic moment. Total magnetoelastic energy of the sphere-interface system is a sum of magnetoelastic energy of the sphere, energy of the interactions between the sphere and the interface and also the energy of the interface. It was shown that magnetoelastic energy depends on the sphere size and interface thickness.
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 531-534
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Joule Heating Preannealing Effect in the Coercivity Field and Magnetostriction Constant of Co$\text{}_{66}$Fe$\text{}_{4}$Mo$\text{}_{2}$Si$\text{}_{16}$B$\text{}_{12}$ Alloy
Autorzy:
Garcia Tello, P.
González, J.
Blanco, J.
Żuberek, R.
Powiązania:
https://bibliotekanauki.pl/articles/2013239.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.30.Gw
75.80.+q
Opis:
The effect of thermal treatments (by the Joule heating and conventional annealing) on the coercivity and saturation magnetostriction constant in the amorphous and nanocrystalline Co$\text{}_{66}$Fe$\text{}_{4}$Mo$\text{}_{2}$Si$\text{}_{16}$B$\text{}_{12}$ alloy is reported. It is noticeable the near insensibility to the external stress of coercive field and anisotropy field (leading to extremely low value of magnetostriction 1.5×10$\text{}^{-8}$) achieved after the Joule heating by two steps (first one to relax the internal stresses and the second one to develop a fine nanocrystalline structure).
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 595-598
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elastic Properties of Zinc Blende MnTe
Autorzy:
Djemia, P.
Roussigné, Y.
Stashkevich, A.
Szuszkiewicz, W.
Gonzalez Szwacki, N.
Dynowska, E.
Janik, E.
Kowalski, B. J.
Karczewski, G.
Bogusławski, P.
Jouanne, M.
Morhange, J.
Powiązania:
https://bibliotekanauki.pl/articles/2038250.pdf
Data publikacji:
2004-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.Dc
75.50.Pp
78.35.+c
Opis:
The Brillouin light scattering was used to investigate elastic properties of the zinc blende, MBE-grown MnTe layer that was deposited on a (001) GaAs substrate covered by CdTe buffer layer. The three elastic constants of the zinc blende MnTe, namely c$\text{}_{11}$, c$\text{}_{12}$, and c$\text{}_{44}$, were directly determined for the first time from the frequency of the Rayleigh mode, of the pseudo-surface mode, and of the shear horizontal bulk mode traveling parallel to the layer surface. The value of c$\text{}_{11}$ was checked using the frequency of longitudinal bulk waves propagating at different angles from the normal of the layer plane. This value was also independently determined by results of the folding of acoustic phonons, observed for MnTe/CdTe superlattices by the Raman scattering. Finally, the bulk modulus given by the formula B=(c$\text{}_{11}$+2c$\text{}_{12}$)/3 was determined for zinc blende MnTe by ab initio calculations making use of the density functional theory and atomic pseudopotentials; spin polarization of MnTe was taken into account. A satisfactory agreement between theoretical and experimental values was obtained.
Źródło:
Acta Physica Polonica A; 2004, 106, 2; 239-247
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Properties of MnTe, ZnTe, and ZnMnTe
Autorzy:
Gonzalez Szwacki, N.
Przeździecka, E.
Dynowska, E.
Bogusławski, P.
Kossut, J.
Powiązania:
https://bibliotekanauki.pl/articles/2038244.pdf
Data publikacji:
2004-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.50.Ah
75.50.Pp
61.10.-i
Opis:
Structural properties of ZnTe, MnTe, and Mn$\text{}_{1-x}$Zn$\text{}_{x}$Te alloy with zinc-blende, NiAs, and wurtzite phases were investigated by ab initio calculations. The calculated structural properties are in good agreement with the available experimental data. Theory predicts that the zinc-blende phase is more stable than wurtzite for all compositions. Mn$\text{}_{1-x}$Zn$\text{}_{x}$Te samples with 0.01 < x < 0.20 were grown by MBE. X-ray analysis of their crystalline structure revealed the presence of zinc-blende, wurtzite, and NiAs phases. The dominant phase changes from NiAs for the sample with x=0.01 to wurtzite for x=0.20. The observed stabilization of the wurtzite phase is possibly due to the hexagonal structure of the MnTe buffer.
Źródło:
Acta Physica Polonica A; 2004, 106, 2; 233-238
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Investigation of Large-Signal Noise in Nanometric Schottky-Barrier Diodes Operating in External Resonant Circuits
Autorzy:
Shiktorov, P.
Starikov, E.
Gružinskis, V.
Varani, L.
Vaissière, J.
Reggiani, L.
Pérez, S.
González, T.
Powiązania:
https://bibliotekanauki.pl/articles/1178800.pdf
Data publikacji:
2005-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.20.Ht
72.30.+q
72.70.+m
Opis:
We report Monte Carlo simulations of electronic noise in heavily doped nanometric GaAs Schottky-barrier diodes operating in series with a parallel resonant circuit when a high-frequency large-signal voltage is applied to the whole system. Significant modifications of the noise spectrum with respect to the unloaded diode are found to occur in the THz-region.
Źródło:
Acta Physica Polonica A; 2005, 107, 2; 396-399
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electromagnetic Properties of Substituted Barium Hexaferrites
Autorzy:
Sláma, J.
Grusková, A.
Jančárik, V.
Štofka, M.
González-Angeles, A.
Powiązania:
https://bibliotekanauki.pl/articles/1813950.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.50.Vv
81.20.Ev
81.20.Ka
Opis:
Substituted M-type ferrite $BaFe_{12-2x}(Me_1Me_2)_xO_{19}$, 0≤x≤0.6 was prepared by both mechanical alloying and precursor method, where $Me_1$ = Co, Ni, Zn, Sn and $Me_2$ =Ru, Ti, Zr, Sn. Magnetic phase purity, change of saturation polarization, Curie temperature, coercivity and magnetic susceptibility was studied as function of x. Attention was focused to results obtained for $(NiRu)_x,$ $(ZnRu)_x,$ and $(SnRu)_x$ mixtures with low doping ratio x.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 609-612
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protection From Steam at High Pressures: Development of a Test Device and Protocol
Autorzy:
Sati, R.
Crown, E. M.
Ackerman, M.
Gonzalez, J.
Dale, D.
Powiązania:
https://bibliotekanauki.pl/articles/90402.pdf
Data publikacji:
2008
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
steam protection
high pressure steam
protective materials
Opis:
Extensive use of pressurized steam in the oil and gas sectors has led to incidents where workers were seriously injured. In this study a test device and procedure to measure heat transfer through fabrics during steam exposure were developed and evaluated. Several factors were considered while designing the test device to simulate work site conditions. Fabrics were exposed to steam at 2 distances (50 and 100 mm) and 2 pressures (207 and 69 kPa). Theoretical considerations included heat and mass transfer, and fabric structure and performance properties. The test device and procedure differentiated well among both fabric and exposure conditions. For all fabrics, maximum heat transfer was observed at highest steam pressure and shortest distance. Laminated and coated fabrics performed better than a fabric without such treatments.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2008, 14, 1; 29-41
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractal dimension and anisotropy of soil CO2 emission in an agricultural field during fallow
Autorzy:
La Scala, N.,Jr.
Panosso, A.R.
Pereira, G.T.
Gonzalez, A.P.
Miranda, J.G.V.
Powiązania:
https://bibliotekanauki.pl/articles/24282.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2009, 23, 4; 353-358
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving the intensification and diversification balance of the tabu solution for the Robust Capacitated International Sourcing problem (RoCIS)
Autorzy:
Huacuja, H. J. F.
González-Velarde, J. R.
Valdez, G. C.
Powiązania:
https://bibliotekanauki.pl/articles/385145.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
RoCis
heuristic approach
optimization
initial solution
tabu search
memory strategies
Opis:
This paper addresses the robust capacitated international sourcing problem (RoCIS), which consists of selecting a subset of suppliers with finite capacity, from an available set of potential suppliers internationally located. This problem was introduced by González-Velarde and Laguna in [1], where they propose a deterministic solution method based on tabu search memory strategies. The pro cess consists of three steps: build an initial solution, create a neighborhood of promising solutions and perform a local search in the neighborhood. In this work we propose improving the construction of the initial solution, the cons truction of the neighborhood, the local search, and the intensification and diversification balance. Experimental evidence shows that the improved tabu solution with diver sification outperforms the best solutions reported for six of the instances considered, increases by 18% the number of best solutions found and reduces by 44% the deviation of the best solution found, respect to the best algorithm reported.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 4; 64-73
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 72

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