1,599 research outputs found

    Elements of the Integrated Support Model for Innovative Academic Entrepreneurship

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    Przedstawiony artykuł poświęcony jest tendencjom rozwoju przedsiębiorczości akademickiej. W pierwszej jego części omówiono pojęcie oraz formy przedsiębiorczości akademickiej. Rozwój tej postaci przedsiębiorczości jest konsekwencją przekształceń uczelni wyższych oraz jej dopasowania do wyzwań współczesnego rozwoju gospodarczego. W drugiej części skoncentrowano się na wybranych zagadnieniach związanych ze wsparciem przedsiębiorczości akademickiej, a w szczególności: etapach działań wspierających inicjatywy przedsiębiorcze, czynnikach i modelach wsparcia przedsiębiorstw. Omówiono także kontekst międzynarodowy podejmowania innowacji i jego wpływ na postawy przedsiębiorcze w środowisku akademickim

    Anomalous magnetotransport in the heavy-fermion superconductor Ce2PdIn8

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    The normal state behavior in the heavy-fermion superconductor Ce2PdIn8 has been probed by means of Hall coefficient (RH) and transverse magnetoresistivity (MR) measurements. The results indicate the predominance of contributions from antiferromagnetic spin fluctuations at low temperatures. Anomalous non-Fermi-liquid-like features, observed below 8 K in both RH(T) and MR(T), are related to underlying quantum critical point, evidenced before in the specific heat and the electrical resistivity data. The magnetotransport in Ce2PdIn8 is shown to exhibit specific types of scaling that may appear universal for similar systems at the verge of magnetic instability.Comment: Accepted as a Rapid Communication in Physical Review

    Doping dependence of the Nernst effect in Eu(Fe1-xCox)2As2 - departure from Dirac fermions physics

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    We report a systematic study of the transport properties in the series of Eu(Fe1-xCox)2As2 single crystals with x = 0, 0.15, 0.20 and 0.30. Spin-density-wave order is observed in the undoped and the least doped samples (x = 0, 0.15), while for x = 0.15 and 0.20 Eu(Fe1-xCox)2As2 becomes a superconductor. We found the properties of the parent EuFe2As2 compound well described by the Dirac fermions model, whereas cobalt doping caused an evolution of the system toward a regular metallic state. The antiferromagnetic ordering of the Eu2+ ions at T_N ~ 20 K has only minor influence on the measured quantities.Comment: 5 pages, 5 figures; ver.3: the sign convention for the Nernst coefficient is change

    Enhancement of the Hall-Lorenz number in optimally doped YBa2Cu3O_7-d

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    Electronic heat transport in the normal state of a high-quality single crystal of optimally-doped superconductor YBa2Cu3O6.95 was studied by measurements of longitudinal and transverse transport coefficients. For the temperature range from 100 to 300 K, the Hall-Lorenz number (Lxy) depends weakly on temperature and is about two times larger than the Sommerfeld value of the Lorenz number Lo = (pi^2)/3. Our results can be interpreted using a Fermi liquid model when effects of the pseudogap that opens at the Fermi level are included. However, we find that the bipolaron model can also explain both the enhanced value and the weak temperature dependence of the Hall-Lorenz number.Comment: Accepted for publication in Europhysics Letters; 16 pages, 2 figure
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