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Search results for: structure

  • Crystal structure and electronic structure of CePt2In7

    Publication
    • T. Klimczuk
    • O. Walter
    • L. Müchler
    • J. W. Krizan
    • F. Kinnart
    • R. J. Cava

    - JOURNAL OF PHYSICS-CONDENSED MATTER - Year 2014

    We report a corrected crystal structure for the CePt2In7 superconductor, refined from single crystal x-ray diffraction data. The corrected crystal structure shows a different Pt–In stacking along the c-direction in this layered material than was previously reported. In addition, all of the atomic sites are fully occupied with no evidence of atom site mixing, resolving a discrepancy between the observed high resistivity ratio of...

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  • Electronic structure of TbBa2Cu3O7

    W pracy wykonano obliczenia kwantowomechaniczne struktury elektronowej hipotetycznego materiału TbBa2Cu3O7 (Dy123) metodą FP-LAPW (full potential - linearized augmented plane wave) w ramach formalizmu DFT (density functional theory) stosując przybliżenie GGA (generalized gradient approximation). Ze względu na silne oddziaływania korelacyjne elektronów 4f w atomie Tb zastosowano dodatkowo poprawkę kulombowską U w ramach modelu...

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  • The structure of nystatin A2

    Publication

    Budowa chemiczna składnika kompleksu nystatyn (nystatyny A2) została ustalona na podstawie analizy estru metylowego N-acetylonystatyny A2 przy pomocy metod spektroskopowych UV, MS i NMR. Widmo UV wskazało obecność w badanym związku chromoforu tetraenowego. Ciężar cząsteczkowy ustalono jako 909 j.m. na postawie analizy MS z wykorzystaniem techniki FAB, co pozwoliło wydedukować skład elementarny nystatyny A2 jako C47H75NO16. Analizy...

  • Fatigue of the ship structure.

    Publication

    - Year 2004

    Zaprezentowano wyniki prac badawczych zachowania paneli SANDWICH pod obciążeniem zginającym. Prace prowadzone były w Kat. Technol. Okrętów i Obiektów Oceanotechn. Wydz. OiO i obejmowały między innymi badania konstrukcji w skali rzeczywistej. Dokonano porównania uzyskanych rezultatów z wynikami prezentowanymi w literaturze.

  • Electronic structure of CeBa2Cu3O7.

    Przeprowadzono obliczenia ab initio struktury elektronowej związku CeBa2Cu3-O7(Ce123) metodą LAPW oraz porównano z analogicznymi strukturami otrzymanymi dla YBa2Cu3O7 (Y123), NdBa2Cu3O7(Nd123) i PrBa2Cu3O7(Pr123). Wszystkie wyliczone struktury pasmowe są zasadniczo podobne. W pracy postawiono hipotezę dotyczącą korelacji pomiędzy silnym rozszczepieniem spinowym w Pr123 i Ce123a niestabilnością strukturalną tych układów.

  • The Boltzmann sequence-structure channel

    Publication

    - Year 2016

    We rigorously study a channel that maps binary sequences to self-avoiding walks in the two-dimensional grid, inspired by a model of protein statistics. This channel, which we also call the Boltzmann sequence-structure channel, is characterized by a Boltzmann/Gibbs distribution with a free parameter corresponding to temperature. In our previous work, we verified experimentally that the channel capacity has a phase transition for...

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  • Structure and Interactions in Chitosan Composites

    Publication
    • K. Lewandowska
    • A. Sionkowska
    • G. Furtos
    • S. Grabska
    • M. Michalska

    - Key Engineering Materials - Year 2016

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  • Structure and Magnetic Properties of Eu2CaCu2O6

    Publication

    - CHEMISTRY OF MATERIALS - Year 2006

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  • Structure and magnetic properties of Eu2CaCu2O6

    Publication
    • Q. Xu
    • T. Klimczuk
    • J. Jansen
    • R. J. Cava
    • H. W. Zandbergen

    - CHEMISTRY OF MATERIALS - Year 2006

    Dyskutowany jest nowy typ związku na bazie tlenku miedzi. Jest to pierwszy związek o tzw. zero wymiarowym charakterze Cu-O.

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  • Probing the structure of quantum mechanics

    Publication

    - Year 2002

    Wstęp do problemów dotyczących struktury mechaniki kwantowej, a w szczegółności związanych z jej nieliniowością, nielokalnością, a także problemami aks-jomatyzacji i wykorzystaniem zjawisk kwantowych do budowy komuterów.

  • Increasing ship structure crashworthiness

    Publication

    - Year 2011

    Zmniejszanie ryzyka zanieczyszczenia środowiska w przypadku transportu morskiego materiałów niebezpiecznych stanowi ważny problem badawczy. Jednym z kluczowych zagadnień w tym obszarze stanowią aspekty związane ze zwiększaniem odporności konstrukcji na kolizję. W pracy omówiono najważniejsze metody zwiększania możliwości pochłaniania energii kolizji przez konstrukcje cienkościenne.

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  • Average Structure, Local Structure, Photoluminescence, and NLO Properties of Scheelite Type NaCe(WO4)2

    Publication
    • A. Munirathnappa
    • J. Neuefeind
    • P. Yanda
    • A. Sundaresan
    • I. Kityk
    • K. Ozga
    • J. Jedryka
    • P. P.
    • A. Rao
    • N. Sundaram

    - CRYSTAL GROWTH & DESIGN - Year 2019

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  • Structure and thermal expansion of liquid bismuth

    Publication

    - MATERIALS SCIENCE-POLAND - Year 2015

    Experimental structural data for liquid Bi were used for estimation of the main structure parameters as well as the thermal expansion coefficient both in supercooled and superheated temperature ranges. It was shown that the equilibrium melt had a positive thermal expansion coefficient within a temperature range upon melting and a negative one at higher temperatures. The former was related to structure changes upon melting, whereas...

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  • Structure and paramagnetism in weakly correlated Y8Co5

    Publication
    • T. Klimczuk
    • V. A. .. Sidorov
    • A. Szajek
    • M. Werwiński
    • S. A. J. Kimber
    • A. Kozub
    • D. Safarik
    • J. D. Thompson
    • R. J. Cava

    - JOURNAL OF PHYSICS-CONDENSED MATTER - Year 2013

    We report the basic physical properties of monoclinic Y8Co5 determined by means of magnetic susceptibility, electrical resistivity, and specific heat measurements. The crystal structure of Y8Co5 is monoclinic (P21/c) with lattice parameters a = 7.0582(6) Å, b = 7.2894(6) Å, c = 24.2234(19) Å, and β = 102.112(6)° as refined by using synchrotron powder x-ray diffraction data. The compound shows temperature independent paramagnetism...

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  • Surface Structure of Components Created by Stereolitography

    Publication

    Stereolithography is an additive rapid prototyping method. This method is based on the principle of solidifying a liquid photopolymer (resin) by laser radiation. Models obtained with this method are characterized by a specific surface structure called “stairstep effect”. It causes that, the surface should be processed by additional finishing (postprocessing). To minimize the additional machining process, the model should be set...

  • Superconducting properties and electronic structure of NaBi

    Publication
    • S. K. Kushwaha
    • J. W. Krizan
    • J. Xiong
    • T. Klimczuk
    • Q. D. Gibson
    • T. Liang
    • N. Ong
    • R. J. Cava

    - JOURNAL OF PHYSICS-CONDENSED MATTER - Year 2014

    Resistivity, dc magnetization, and heat capacity measurements are reported for superconducting NaBi. Tc, the electronic contribution to the specific heat γ, the ΔCp/γTc ratio, and the Debye temperature are found to be 2.15 K, 3.4 mJ mol−1 K−2, 0.78, and 140 K respectively. The calculated electron–phonon coupling constant (λep = 0.62) implies that NaBi is a moderately coupled superconductor. The upper critical field and coherence...

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  • Quantum structure in competing lizard communities

    Publication

    - ECOLOGICAL MODELLING - Year 2014

    Almost two decades of research on applications of the mathematical formalism of quantum theory as a modeling tool in domains different from the micro-world has given rise to many successful applications in situations related to human behavior and thought, more specifically in cognitive processes of decision-making and the ways concepts are combined into sentences. In this article, we extend this approach to animal behavior, showing...

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  • Structure and Randomness in Planning and Reinforcement Learning

    Publication

    - Year 2021

    Planning in large state spaces inevitably needs to balance the depth and breadth of the search. It has a crucial impact on the performance of a planner and most manage this interplay implicitly. We present a novel method \textit{Shoot Tree Search (STS)}, which makes it possible to control this trade-off more explicitly. Our algorithm can be understood as an interpolation between two celebrated search mechanisms: MCTS and random...

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  • Structure and properties of magnesium cast alloys

    Publication
    • L. Dobrzański
    • T. Tański
    • L. Čížek
    • Z. Brytan
    • Z. Brytan

    - Journal of Materials Processing Technology - Year 2007

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  • Destabilisation of the structure of transthyretin is driven by Ca2+

    Publication
    • E. Wieczorek
    • S. Kędracka-Krok
    • D. Bystranowska
    • M. Ptak
    • K. Wiak
    • Z. Wygralak
    • U. Jankowska
    • A. Ożyhar

    - International Journal of Biological Macromolecules - Year 2021

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