201 research outputs found

    Panegiryk jako narzędzie komunikacji społecznej. Charites słowieńskie Jana Zawickiego i Łabęć żałośnie śpiewający Hiacynta Przetockiego

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    Udostępnienie publikacji Wydawnictwa Uniwersytetu Łódzkiego finansowane w ramach projektu „Doskonałość naukowa kluczem do doskonałości kształcenia”. Projekt realizowany jest ze środków Europejskiego Funduszu Społecznego w ramach Programu Operacyjnego Wiedza Edukacja Rozwój; nr umowy: POWER.03.05.00-00-Z092/17-00

    The Nature of the Interlayer Interaction in Bulk and Few-Layer Phosphorus

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    An outstanding challenge of theoretical electronic structure is the description of van der Waals (vdW) interactions in molecules and solids. Renewed interest in resolving this is in part motivated by the technological promise of layered systems including graphite, transition metal dichalcogenides, and more recently, black phosphorus, in which the interlayer interaction is widely believed to be dominated by these types of forces. We report a series of quantum Monte Carlo (QMC) calculations for bulk black phosphorus and related few-layer phosphorene, which elucidate the nature of the forces that bind these systems and provide benchmark data for the energetics of these systems. We find a significant charge redistribution due to the interaction between electrons on adjacent layers. Comparison to density functional theory (DFT) calculations indicate not only wide variability even among different vdW corrected functionals, but the failure of these functionals to capture the trend of reorganization predicted by QMC. The delicate interplay of steric and dispersive forces between layers indicate that few-layer phosphorene presents an unexpected challenge for the development of vdW corrected DFT.Comment: 8 pages, 6 figure

    Social work practice with Latino Pentecostals : applying femininst family theory and object relations theory

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    This study was undertaken to provide a framework for understanding the identity formation and experience of Latino Pentecostals. The exploration of Feminist Family Theory accompanied by Object Relations Theory provided two opportunities to appreciate the Latino Pentecostal experience. This study focuses on documenting the evolution of the Latino Pentecostal community in the United States and a description of the traditional aspects of this faith group in terms of practice of Spirit Baptism and traits as religious fundamentalists, collectivistic, and social activists. The application of a Feminist Family Theory lens provides a perspective on opening the conversation to dismantle the dominant discourse and unearth the subjugated story of the Latino Pentecostals. Object Relations Theory provides a frame for exploring the internalized experience of Latino Pentecostals in relation to their external experience. The major points of the discussion include the notion that much of the Latino Pentecostal tradition is based in experience rather than rules and religiously structured guidelines to practice. The experiential nature of Latino Pentecostalism leaves much as indefinable. The indefinable nature of the experience leaves a lot of ambiguity. The ambiguity of the experience is well complimented by the Feminist Family Theory in that it is a lens through which one works rather than a set of treatment modalities. Object Relations Theory also leaves room for the individual experience providing a theoretical frame for which to explore the treatment of Latino Pentecostals

    When is better ground state preparation worthwhile for energy estimation?

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    Many quantum simulation tasks require preparing a state with overlap γ\gamma relative to the ground state of a Hamiltonian of interest, such that the probability of computing the associated energy eigenvalue is upper bounded by γ2\gamma^2. Amplitude amplification can increase γ\gamma, but the conditions under which this is more efficient than simply repeating the computation remain unclear. Analyzing Lin and Tong's near-optimal state preparation algorithm we show that it can reduce a proxy for the runtime of ground state energy estimation near quadratically. Resource estimates are provided for a variety of problems, suggesting that the added cost of amplitude amplification is worthwhile for realistic materials science problems under certain assumptions
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