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Wyświetlanie 1-10 z 72
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:
Diálogos metaficcionales e intermediales (II) entre Agustín Fernández Mallo y Enrique Vila-Matas
Metafictional and Intermedial (II) Dialogues Between Agustín Fernández Mallo and Enrique Vila-Matas
Autorzy:
Gil González, Antonio J.
Powiązania:
https://bibliotekanauki.pl/articles/1051209.pdf
Data publikacji:
2013-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Metafiction
intermediality
Darío Villanueva
Umberto Eco
Agustín Fernández Mallo
Enrique Vila-Matas
Nocilla Lab
Opis:
The essay, dedicated to Darío Villanueva, one of the most important Spanish specialists in literary theory and comparative literature of the 20th century, explores in the first part his contribution to the research on metaliterature and metafiction in the Spanish contemporary novel of the decades of 1980-1990. His works establish the relationships of these concepts with postmodernity theories and with umberto Eco’s thesis in Il nome della rosa, Postille and other relevant essays of the Italian author. In the second part of the text, the aim is to apply these concepts of literary self-consciousness and reflexivity in the novel as a story-telling device in the work of one of the most relevant Spanish young writers of the 21st Century, Agustín Fernandez Mallo’s Nocilla Lab. In this sense, we will focus the ending sequence, written (and designed) in form of a comic book or graphic novel, in which the young author puts himself beside the more recognized Enrique Vila-Matas, as an allegoric and fictional reflection of Pierre Bourdieu’s theories about the literary field.
Źródło:
Studia Romanica Posnaniensia; 2013, 40, 2; 39-49
0137-2475
2084-4158
Pojawia się w:
Studia Romanica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
Electron Transmission through Graphene Bilayer Flakes
Autorzy:
Chico, L.
González, J.
Santos, H.
Pacheco, M.
Brey, L.
Powiązania:
https://bibliotekanauki.pl/articles/1419511.pdf
Data publikacji:
2012-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.22.-f
73.63.-b
Opis:
We investigate the electronic transport properties of a bilayer graphene flake contacted by two monolayer nanoribbons. This finite-size bilayer flake can be built by overlapping two semi-infinite ribbons. We study and analyze the electronic behavior of this structure by means of a tight-binding method and a continuum Dirac model. We have found that the conductance oscillates markedly between zero and the maximum value of the conductance, allowing for the design of electromechanical switches.
Źródło:
Acta Physica Polonica A; 2012, 122, 2; 299-303
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:
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:
Control in loan transactions: adjusting the payments to the real inflation rates
Autorzy:
Cruz Rambaud, S.
González Sánchez, J.
Powiązania:
https://bibliotekanauki.pl/articles/205670.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
adjustment
loan
payment
inflation
interest rate
Opis:
This paper explores the effect of inflation on general financial transactions and particularly on loans. For this purpose, inflation is specified in the mathematical expression of a capitalization or discounting function. Thus, we write these functions as the product of an inflation-free capitalization or discounting function and the law of variation of the money purchasing power. As an immediate consequence, we show that the instantaneous rate of a capitalization or discounting function is the sum of the instantaneous rates of each component. Later, this decomposition is applied to simple and compound financial transactions, leading to the equivalence among deflated amounts by means of an inflation-free capitalization or discounting function. This analysis is applied to a loan transaction where we introduce six methods to adjust the payments to the real inflation, because, in a beginning, these payments were calculated with the predicted inflation rates.
Źródło:
Control and Cybernetics; 2013, 42, 4; 829-853
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 72

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