273 research outputs found

    Increment of the collective pinning energy in Na1 − xCa x Fe2As2 single crystals with random point defects introduced by proton irradiation

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    We study the influence of random point defects introduced by 3 MeV proton irradiation (doses 1 × 1016 and 2 × 1016 cm2) on the vortex dynamics of Na x Ca1 − xFe2As2 (x = 0.5 and x = 0.75) single crystals. Our results indicate that the irradiation produces an enhancement of the critical current density and a reduction of the creep rate in vortex relaxation. The plateau in the temperature dependence of vortex creep rate initially present in as-grown single crystals disappears after irradiation. This fact can be associated with a large increment of the collective pinning energy (from <100 to 350–400 K). On the other hand, Maley analysis indicates that after irradiation both samples present a glassy exponent μ close to the one expected in the so-called large bundle regime (μ ≈ 7/9) for random point defects.Fil: Haberkorn, Nestor Fabian. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Kim, Jeehoon. Pohang University of Science and Technology; Corea del SurFil: Maiorov, B.. Los Alamos National Laboratory; Estados UnidosFil: Usov, I.. Los Alamos National Laboratory; Estados UnidosFil: Chen, G. F.. Renmin University of China; ChinaFil: Yu, W.. Renmin University of China; ChinaFil: Civale, L.. Los Alamos National Laboratory; Estados Unido

    Structural characterisation and Kerr magnetometry of Fe/Mo(110) epitaxial system

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    THESIS 7579This thesis describes the investigation of the growth and magnetic properties of ultrathin Fe films on the Mo(110) surface. The surface magneto optical Kerr effect (SMOKE) setup was designed and built by author and used in conjunction with the surface characterisation techniques to study magnetic anisotropy and magnetic phase transition in Fe/Mo(110) films. The emphasis is made on correlation between magnetic properties and film morphology

    Physics of Atomic Nuclei V. 68, I. 11

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    Physics of Atomic Nuclei -- November 2005 Volume 68, Issue 11, pp. 1765-1955 NUCLEI Experiment Comparative Analysis of the 178m2Hf Yield at Reactions with Different Projectiles S. A. Karamian pp. 1765-1776 Full Text: PDF (260 kB) Study of the pd Reaction at Ultralow Energies Using Hydrogen Liner Plasma V. M. Bystritsky, Vit. M. Bystritskii, G. N. Dudkin, V. V. Gerasimov, A. R. Krylov, G. A. Mesyats, B. A. Nechaev, V. M. Padalko, S. S. Parzhitsky, F. M. Pen'kov, N. A. Ratakhin, and J. Wozniak pp. 1777-1786 Full Text: PDF (273 kB) Determination of Nuclear Excitation Energies from the Number of Evaporated Particles V. A. Ditlov, V. V. Dubinina, N. P. Egorenkova, V. I. Krotkova, E. A. Pozharova, and V. A. Smirnitsky pp. 1787-1789 Full Text: PDF (122 kB) ELEMENTARY PARTICLES AND FIELDS Experiment Single-Spin Asymmetry of Inclusive Neutral-Pion Production in pp[up-arrow] Interactions at 70 GeV in the Region –0.4 < xF < –0.1 A. N. Vasiliev, V. N. Grishin, A. M. Davidenko, A. A. Derevshchikov, Yu. A. Matulenko, Yu. M. Mel'nik, A. P. Meshchanin, V. V. Mochalov, L. V. Nogach, S. B. Nurushev, A. F. Prudkoglyad, P. A. Semenov, L. F. Soloviev, V. L. Solovianov[dagger], V. Yu. Khodyrev, K. E. Shestermanov, A. E. Yakutin, N. S. Borisov, V. N. Matafonov[dagger], A. B. Neganov, Yu. A. Plis, Yu. A. Usov, A. N. Fedorov, and A. A. Lukhanin pp. 1790-1795 Full Text: PDF (170 kB) Measurements of the Total-Cross-Section Difference DeltasigmaL(np) at 1.39, 1.69, 1.89, and 1.99 GeV V. I. Sharov, N. G. Anischenko, V. G. Antonenko, S. A. Averichev, L. S. Azhgirey, V. D. Bartenev, N. A. Bazhanov, A. A. Belyaev, N. A. Blinov, N. S. Borisov, S. B. Borzakov, Yu. T. Borzunov, Yu. P. Bushuev, L. P. Chernenko, E. V. Chernykh, V. F. Chumakov, S. A. Dolgii, A. N. Fedorov, V. V. Fimushkin, M. Finger, M. Finger, Jr., L. B. Golovanov, G. M. Gurevich, A. Janata, A. D. Kirillov, V. G. Kolomiets, E. V. Komogorov, A. D. Kovalenko, A. I. Kovalev, V. A. Krasnov, P. Krstonoshich, E. S. Kuzmin, V. P. Ladygin, A. B. Lazarev, F. Lehar, A. de Lesquen, M. Yu. Liburg, A. N. Livanov, A. A. Lukhanin, P. K. Maniakov, V. N. Matafonov[dagger], E. A. Matyushevsky, V. D. Moroz[dagger], A. A. Morozov, A. B. Neganov, G. P. Nikolaevsky, A. A. Nomofilov, Tz. Panteleev, Yu. K. Pilipenko, I. L. Pisarev, Yu. A. Plis, Yu. P. Polunin, A. N. Prokofiev, V. Yu. Prytkov, P. A. Rukoyatkin, V. A. Schedrov, O. N. Schevelev, S. N. Shilov, R. A. Shindin, M. Slunecka, V. Slunecková, A. Yu. Starikov, G. D. Stoletov[dagger], L. N. Strunov, A. L. Svetov, Yu. A. Usov, T. Vasiliev, V. I. Volkov, E. I. Vorobiev, I. P. Yudin, I. V. Zaitsev, A. A. Zhdanov, and V. N. Zhmyrov pp. 1796-1811 Full Text: PDF (497 kB) Theory Self-Consistent Description of the Inner Crust of a Neutron Star with Allowance for Superfluidity Effects M. Baldo, U. Lombardo, É. E. Saperstein, and S. V. Tolokonnikov pp. 1812-1829 Full Text: PDF (438 kB) Determination of Quark–Antiquark Component of the Photon Wave Function for u, d, s Quarks A. V. Anisovich, V. V. Anisovich, L. G. Dakhno, V. A. Nikonov, and A. V. Sarantsev pp. 1830-1841 Full Text: PDF (330 kB) Rare Radiative Leptonic Decays B0d,s --> [script-l]+[script-l]–gamma D. I. Melikhov, N. V. Nikitin, and K. S. Toms pp. 1842-1850 Full Text: PDF (262 kB) Higgs Bosons in the Two-Doublet Model Involving CP Violation É. N. Akhmetzyanova, M. V. Dolgopolov, and M. N. Dubinin pp. 1851-1865 Full Text: PDF (325 kB) Color Flows for the Process gg --> Bc + c + b-bar A. V. Berezhnoy pp. 1866-1872 Full Text: PDF (288 kB) A Systematic Study of QCD Coupling Constant from Deep-Inelastic Measurements V. G. Krivokhizhin and A. V. Kotikov pp. 1873-1903 Full Text: PDF (557 kB) Gravity as the Affine Goldstone Phenomenon and Beyond Yu. F. Pirogov pp. 1904-1915 Full Text: PDF (251 kB) X INTERNATIONAL CONFERENCE "SYMMETRY METHODS IN PHYSICS" ARMENIA, YEREVAN, AUGUST 13–19, 2003 An Approach to Reduction of the Real Symmetric 3 × 3 Secular Problem and Applications I. M. Mladenov and C. D. Mladenova pp. 1916-1921 Full Text: PDF (172 kB) Order–Disorder Transition in One-Dimensional System with Disorder in Composition V. F. Morozov, A. V. Badasyan, E. Sh. Mamasakhlisov, and A. V. Grigoryan pp. 1922-1925 Full Text: PDF (129 kB) One-Electron States of a 2D Spatially Limited System R. M. Movsesyan and A. S. Sahakyan pp. 1926-1928 Full Text: PDF (120 kB) Rational Conformal Correlation Functions of Gauge-Invariant Local Fields in Four Dimensions N. M. Nikolov, Ya. S. Stanev, and I. T. Todorov pp. 1929-1940 Full Text: PDF (264 kB) Spectrum Generating Algebra and Coherent States of the Clambda-Extended Oscillator C. Quesne pp. 1941-1946 Full Text: PDF (169 kB) On Two Nonintegrable Cases of the Generalized Hénon–Heiles System S. Yu. Vernov and E. I. Timoshkova pp. 1947-1955 Full Text: PDF (192 kB)Archived web conten

    JETP Letters V. 69, I .02

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    JETP Letters -- January 25, 1999 Volume 69, Issue 2, pp. 91-168 FIELDS, PARTICLES, AND NUCLEI Quasielastic neutron scattering by diffusive adsorbed hydrogen as a possible cause of the energy spreading of ultracold neutrons during long storage in traps Yu. N. Pokotilovskii Full Text: PDF (75 kB) The decay phi --> eta[prime] gamma V. M. Aul'chenko, M. N. Achasov, A. V. Bozhenok, A. D. Bukin, D. A. Bukin, S. V. Burdin, I. A. Gaponenko, V. B. Golubev, T. V. Dimova, S. I. Dolinskii, V. P. Druzhinin, M. S. Dubrovin, V. N. Ivanchenko, P. M. Ivanov, A. A. Korol', S. V. Koshuba, A. A. Mamutkin, E. V. Pakhtusova, S. I. Serednyakov, V. A. Sidorov, Z. K. Silagadze, Yu. V. Usov, V. V. Sharyi, and Yu. M. Shatunov Full Text: PDF (129 kB) The running BFKL: resolution of Caldwell's puzzle N. N. Nikolaev and V. R. Zoller Full Text: PDF (149 kB) ATOMS, SPECTRA AND RADIATION Four-wave mixing under conditions of Doppler-free resonance induced by strong radiation A. K. Popov and A. S. Baev Full Text: PDF (103 kB) Intensity fluctuations in the presence of weak localization of light in a disordered medium D. B. Rogozkin Full Text: PDF (92 kB) CONDENSED MATTER Effect of a pulsed magnetic field on the microhardness of C60 single crystals Yu. A. Osip'yan, R. K. Nikolaev, S. Z. Shmurak, Yu. I. Golovin, D. V. Lopatin, and R. B. Morgunov Full Text: PDF (43 kB) Effect of a magnetic field on the plasticity and photo- and electroluminescence of ZnS single crystals Yu. I. Golovin, R. B. Morgunov, A. A. Baskakov, M. V. Badylevich, and S. Z. Shmurak Full Text: PDF (65 kB) Self-organization of the critical state in a two-dimensional multijunction SQUID under closed boundary conditions S. L. Ginzburg and N. E. Savitskaya Full Text: PDF (91 kB) Green's function of a 2D Fermi system undergoing a topological phase transition V. P. Gusynin, V. M. Loktev, and S. G. Sharapov Full Text: PDF (111 kB) Electromagnetic waves in the nonlocal Josephson electrodynamics of a thin film of a magnetic superconductor A. I. Lomtev Full Text: PDF (113 kB) The de Haas–van Alphen effect in quasi-two-dimensional materials P. D. Grigoriev and I. D. Vagner Full Text: PDF (101 kB) MISCELLANEOUS Synthesis, structure, and formation mechanism of boron nitride nanotubes T. S. Bartnitskaya, G. S. Oleinik, A. V. Pokropivnyi, and V. V. Pokropivnyi Full Text: PDF (238 kB)Archived web conten

    ETHICS OF LIABILITY K.-O.APELY IN THE LANDSCAPES OF CONTRACTUALISM

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    The purpose is to analyse comprehensively the work of the famous German philosopher K-O. Apel through the light of the urgent needs for a comprehensive study of modern contractualism and the development of new variants of philosophical anthropology. In this context to reveal April’s thesis that the main background for the possibility of understanding between people is the ideal communicative community and its attempts to discourse ethics, new, practical content. Methodology. In order to make a sequential analysis of the basic components and principles of ethical responsibility in K-O. Apel’s view of counteractualism the author uses genealogical, hermeneutic and comparative methods that allow to reconstruct Apel’s philosophy as the ethics of global responsibility and solidarity of communicative interaction under the conditions of global environmental and social crisis and the urgent need of vital combination of social contract idea, fairness and responsibility. Scientific novelty. The purpose of the article is clearly defined and productive methodological principles consistently enabled the author to find out that Apel perceives the source of social agreement in rational desire of each participant to obey voluntarily the relevant rules and procedures. And a true freedom and responsibility are based on the correlation of the rights and duties; respect them, which is more significant for the enforcement of their conventional or forced recognition. It is also investigated the attempt of K.-O. Apel to enable such an agreement and understanding between people, which would take into account the following important human virtues and aspirations, respect, justice and solidarity. And above all they are important as being the social and existential foundations for a new philosophical and anthropological discourse. It is consistently proved that in the context of substantial interest of justification was established the algorithms of universal values of modern philosophical anthropology, which will become the core of Apel’s responsible person. Excluding the ethical component of this or that agreement, the essence of democratic behaviour changes to rational behaviour of the participants and to the law validity of agreements belongs only the effectiveness in achieving the best interests of their members. It was reconstructed the memories of K.-O. Apel and Y. Habermas about the need and methodological importance of significance of epistemological (or methodological) solipsism of modern philosophy and its replacement by the concepts of "understanding", "agreement", "communication" within which even a single person can know and understand the world. Conclusions. An important feature of the latest philosophical theories, which include communication philosophy of K.-O. Apel is their organic belonging to the realm of discussion about the search of moral foundations of modern society where basic ethical guidelines and values must leave and eventually leave the sphere of private life, indicating that real attempts to overcome the fragmentation and dispersion of responsibility of the individual. It was exactly K.-O. Apel who stresses that collective irresponsibility should be replaced by collective responsibility

    DIFFERENTIAL AND DIAGNOSTIC CRITERIA OF THE RECURRENCE OF GLIOMAS IN THE POST-OPERATIONAL PERIOD USING OF DYNAMIC CONTRAST-ENHANCED MRA AND PERFUSION MRI

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    Objective: to elaborate differential diagnostic criteria for recurrent gliomas after combination treatment, by using dynamic contrast-enhanced magnetic resonance angiography (DCE-MRA) and T2*-weighted perfusion magnetic resonance imaging (MRI).Material and methods. The retrospective study enrolled 16 men and 7 women (mean age 34.6±15.4 years) who had undergone multiparametric magnetic resonance imaging of the brain to prevent cancer recurrence after combination treatment. The study used the following protocols: 1) static contrast-enhanced MRI, including T2- and T1-weighted MRI, and post-contrastenhanced T1-weighted images at 5–8 minutes after DCE-MPA); 2) DCE-MPA at a dose of 0.2 mmol/kg; 3) in the presence of precontrast-enhanced T2*-weighted perfusion MRI at a dose of 0.1 mmol/kg. A morphological diagnosis was done in all cases. Tumor hemodynamics was evaluated by DCE-MRA using contrast ratios (CR or CBR) in each scanning phase, as well as contrastenhancement ratios (ER or CER) and a venous-arterial ratio in the first venous phase (VAR1). Relative Cerebral Blood Volumes (rCBV) were estimated on the contrast-enhanced T1-weighted perfusion maps. Statistical processing of the results was performed using ROC analysis.Results. According to T2*-weighted perfusion MRI and the results of a follow-up using the RECIST criteria, the investigators formed two comparison groups: 1) progressions (n = 7 (30.4%)) with increased rCBV (&gt;1.75) and 2) stabilization (n = 16 (69.6%)) with reduced rCBV (&lt;1.75). Based on the found threshold values of hemodynamic parameters at DCE-MPA (VAR1 = 1.59) and T2*-weighted perfusion MRI (rCBV = 1.75), they were compared with operational characteristics, which could classify 5 types of hemodynamics (G0–G4) in relation to rCBV and VAR1. A relapse was detected when the category of tumor malignancy coincided with the type of hemodynamics (VAR1 &gt; 1.59), stabilization was found with a decrease (VAR1&lt;1.59), as demonstrated by DCEMRA with 64% sensitivity and 94% specificity.Conclusion. The developed classification of types of hemodynamics at DCE-MRA allows the differential diagnosis of recurrence from stabilization

    Une source cadastrale du district de Temnikov (1613/14) : Lecture continue et étude statistique

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    À l’issue du Temps des Troubles fut lancée une description des terres de l’État russe nécessaire au pouvoir nouvellement installé. La dozornaja kniga du district de Temnikov, établie en 1613/14 par Ivan Usov et ses collègues, est une des rares sources cadastrales de ce type qui nous est parvenue. Sa valeur pour l’histoire des cadastres comme pour l’histoire des Tatars est incontestable. L’auteur présente ici les remarques qui se sont imposées à elle lors de la lecture suivie et de l’étude statistique de cette source. Elle aborde notamment les méthodes de compilation du cadastre, les caractéristiques du peuplement et de la population, la question religieuse, le statut de détenteurs de biens-fonds et insiste sur les questions auxquelles ne permet pas de répondre ce document.By the end of the ‘Times of Trouble’ (Smutnoe vremja), the Russian state initiated a survey of its lands – a project, which was essential to its newly installed power. The dozornaja kniga of the Temnikov district, which was compiled in 1613/14 by Ivan Usov and his colleagues, constitutes one of the few existing cadastral sources of this kind. Its value for the history of cadastral registers and for the history of the Tatars is indisputable. In this article, the author presents those aspects of the document that impressed her as she read it and made a statistical analysis of the data it contains. She examines, among other things, the methods employed in compiling the register, the characteristics of the settlement and the population, the religious question, and the status of landowners. Finally, she reflects on the questions that remain unanswered in the document
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