4,418 research outputs found

    Failure of Universality in Noncompact Lattice Field Theories

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    The nonuniversal behavior of two noncompact nonlinear sigma models is described. When these theories are defined on a lattice, the behavior of the order parameter (magnetization) near the critical point is sensitive to the details of the lattice definition. This is counter to experience and to expectations based on the ideas of universality.Comment: 24 pages, REVTeX version 3.0 with 4 embedded figures, provided separately in compressed-uuencoded postscript packed in a self-extracting csh script produced with uufiles. To appear in J. Math. Phys

    The Institutional Structure and the Cost of Bank Loans: an International Comparison

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    In recent years international comparisons emphasized the importance of institutional and legal factors in capital market development and the performance of private firms. Here that approach is applied to the pricing of bank loans. Loan rates depend on contract parameters such as risk, the existence of covenants and loan size. Syndicate structure and the number of lenders also determine the cost of borrowing. Loan prices are also negatively impacted if the lending banks operate as part of larger conglomerates. Loan prices are also shown to depend on a number of institutional factors, such as the quality of protection of creditor rights and the quality of law enforcement. Curiously, we find that contracts with customers in "French tradition" countries were priced lower, as if having lower risk, than others, other things held equal. This is not in line with other segments of the literature on international capital market differences and institutional factors. It suggests that differences across legal traditions are more complicated than previously understood

    Mapping Diversity of Publication Patterns in the Social Sciences and Humanities: An Approach Making Use of Fuzzy Cluster Analysis

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    &lt;b&gt;Purpose:&lt;/b&gt; To present a method for systematically mapping diversity of publication patterns at the author level in the social sciences and humanities in terms of publication type, publication language and co-authorship.&lt;br&gt;&lt;b&gt;Design/methodology/approach:&lt;/b&gt; In a follow-up to the hard partitioning clustering by Verleysen and Weeren in 2016, we now propose the complementary use of fuzzy cluster analysis, making use of a membership coefficient to study gradual differences between publication styles among authors within a scholarly discipline. The analysis of the probability density function of the membership coefficient allows to assess the distribution of publication styles within and between disciplines.&lt;br&gt;&lt;b&gt;Findings:&lt;/b&gt; As an illustration we analyze 1,828 productive authors affiliated in Flanders, Belgium. Whereas a hard partitioning previously identified two broad publication styles, an international one vs. a domestic one, fuzzy analysis now shows gradual differences among authors. Internal diversity also varies across disciplines and can be explained by researchers&#39; specialization and dissemination strategies.&lt;br&gt;&lt;b&gt;Research limitations:&lt;/b&gt; The dataset used is limited to one country for the years 2000-2011; a cognitive classification of authors may yield a different result from the affiliation-based classification used here.&lt;br&gt;&lt;b&gt;Practical implications:&lt;/b&gt; Our method is applicable to other bibliometric and research evaluation contexts, especially for the social sciences and humanities in non-Anglophone countries.&lt;br&gt;&lt;b&gt;Originality/value:&lt;/b&gt; The method proposed is a novel application of cluster analysis to the field of bibliometrics. Applied to publication patterns at the author level in the social sciences and humanities, for the first time it systematically documents intra-disciplinary diversity.&lt;b&gt;Purpose:&lt;/b&gt; To present a method for systematically mapping diversity of publication patterns at the author level in the social sciences and humanities in terms of publication type, publication language and co-authorship.&lt;br&gt;&lt;b&gt;Design/methodology/approach:&lt;/b&gt; In a follow-up to the hard partitioning clustering by Verleysen and Weeren in 2016, we now propose the complementary use of fuzzy cluster analysis, making use of a membership coefficient to study gradual differences between publication styles among authors within a scholarly discipline. The analysis of the probability density function of the membership coefficient allows to assess the distribution of publication styles within and between disciplines.&lt;br&gt;&lt;b&gt;Findings:&lt;/b&gt; As an illustration we analyze 1,828 productive authors affiliated in Flanders, Belgium. Whereas a hard partitioning previously identified two broad publication styles, an international one vs. a domestic one, fuzzy analysis now shows gradual differences among authors. Internal diversity also varies across disciplines and can be explained by researchers&#39; specialization and dissemination strategies.&lt;br&gt;&lt;b&gt;Research limitations:&lt;/b&gt; The dataset used is limited to one country for the years 2000-2011; a cognitive classification of authors may yield a different result from the affiliation-based classification used here.&lt;br&gt;&lt;b&gt;Practical implications:&lt;/b&gt; Our method is applicable to other bibliometric and research evaluation contexts, especially for the social sciences and humanities in non-Anglophone countries.&lt;br&gt;&lt;b&gt;Originality/value:&lt;/b&gt; The method proposed is a novel application of cluster analysis to the field of bibliometrics. Applied to publication patterns at the author level in the social sciences and humanities, for the first time it systematically documents intra-disciplinary diversity.</span

    Medicinal plants growing in the Judea region: network approach for searching potential therapeutic targets

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    Plants growing in the Judea region are widely used in traditional medicine of the Levant region. Nevertheless, they have not so far been sufficiently analyzed and their medicinal potential has not been evaluated. This study is the first attempt to fill the gap in the knowledge of the plants growing in the region. Comprehensive data mining of online botanical databases and peer-reviewed scientific literature including ethno-pharmacological surveys from the Levant region was applied to compile a full list of plants growing in the Judea region, with the focus on their medicinal applications. Around 1300 plants growing in the Judea region were identified. Of them, 25% have medicinal applications which were analyzed in this study. Screening for chemical-protein interactions, together with the network-based analysis of potential targets, will facilitate discovery and therapeutic applications of the Judea region plants. Such an approach could also be applied as an integrative platform for further searching the potential therapeutic targets of plants growing in other regions of the world

    Analisis Hidrokemograf Airtanah Karst Sistem Sungai Bawah Tanah Bribin Kabupaten Gunung Kidul

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    Penelitian ini dilakukan pada kawasan bertopografi karst, yaitu daerah tangkapan Sungai Bawah Tanah Bribin yang secara administratif terletak di Kabupaten Gunungkidul, Propinsi Daerah Istimewa Yogyakarta. Tujuan dari penelitian ini adalah menganalisis variasi spasial dan temporal karakteristik hidrokimia dari Sungai Bawah Tanah Bribin sepanjang tahun. Metode yang digunakan dalam penelitian ini adalah purposive sampling Dilakukan pengambilan sampel pada daerah hulu hilir dan imbuhan pada Sungai Bawah Tanah Bribin. Data primer yang digunakan adalah debit aliran , kualitas fisik dan kimia. Analisa yang digunakan pada peneitian ini adalah analisa hidrograf, analisa kemograf dan analisa deskriptif. Hasil penelitian menunjukan variasi kimia airtanah pada Sungai Bawah Tanah Bribin pada musim kemarau dan musim penghujan. Pada musim penghujan konsentrasi zat terlarut kalsium (Ca2+) and bikarbonat (HCO3-) di daerah imbuhan, hulu, hilir dan bocoran mengalami penurunan berbanding terbalik dengan besarnya debit aliran,begitu pula dengan nilai DHL. Pada musim kemarau penurunan debit aliran menyebabkan terjadi peningkatan nilai DHL dan konsentrasi zat terlarut kalsium (Ca2+) and bikarbonat (HCO3-) pada Sungai Bawah Tanah Bribin

    Pengaruh Hypnoparenting terhadap Status Gizi Balita

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    Tujuan: Dampak dari gizi kurang yang terjadi pada Balita yaitu terhambatnya perkembangan otak, pertumbuhan fisik, perkembangan motorik, perkembangan mental serta meningkatnya angka kesakitan dan kematian Balita. Karena masalah ini dihawatirkan bangsa Indonesia akan mengalami loss generation (Depkes RI, 2002). Suatu metode hipnosis yaitu hypnoparenting dapat mengubah berbagai perilaku negatif anak yang menolak makan guna meningkatkan asupan nutrisi dan status gizi. Tujuan penelitian ini adalah untuk mengetahui pengaruh hypnoparenting terhadap status gizi Balita di Indralaya dengan parameter BB/U, TB/U dan BB/TB. Metode: Desain penelitian ini adalah quasy experiment dengan non randomised pre test post test design. Populasi pada penelitian ini adalah Balita di wilayah kerja puskesmas Indralaya dan sampel didapatkan secara purposive sampling sebanyak 21 responden (10 intervensi, 11 kontrol). Hasil: Dari penelitian ini didapatkan hasil karakteristik umur rata-rata responden 45,57±18,92, berat badan 15,81±4,00, tinggi badan 99,00±7,69 dan laki-laki 8 (38,09%) dan perempuan 13 (61,90%). Analisis statistik non parametrik menunjukkan bahwa tidak terdapat perbedaan rata-rata status gizi sebelum dan sesudah dilakukan hypnoparenting dan tidak terdapat perbedaan rata-rata status gizi antara kelompok intervensi dan kelompok kontrol. Simpulan: Perlu adanya investigasi lebih lanjut tentang rentang waktu pelaksanaan hypnoparenting yang efektif dan penelitian lanjut kehadiran peneliti pada saat hypnoparenting

    Regulation of brain endothelial barrier function by microRNAs in health and neuroinflammation

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    Brain endothelial cells constitute the major cellular element of the highly specialized blood–brain barrier (BBB) and thereby contribute to CNS homeostasis by restricting entry of circulating leukocytes and blood-borne molecules into the CNS. Therefore, compromised function of brain endothelial cells has serious consequences for BBB integrity. This has been associated with early events in the pathogenesis of several disorders that affect the CNS, such as multiple sclerosis, HIV-associated neurologic disorder, and stroke. Recent studies demonstrate that brain endothelial microRNAs play critical roles in the regulation of BBB function under normal and neuroinflammatory conditions. This review will focus on emerging evidence that indicates that brain endothelial microRNAs regulate barrier function and orchestrate various phases of the neuroinflammatory response, including endothelial activation in response to cytokines as well as restoration of inflamed endothelium into a quiescent state. In particular, we discuss novel microRNA regulatory mechanisms and their contribution to cellular interactions at the neurovascular unit that influence the overall function of the BBB in health and during neuroinflammatio

    Checks and balances in democratic control of public police. A case study of the Dutch national police after the reform

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    This paper researches the quality of democratic control of the public police in a democratic society. Governance structures tend to be complex, reflecting that in democratic societies the police perform a wide range of tasks, both (inter) nationally and locally. Given the variety of police authorities and consultations at different levels, is there room for adequate democratic oversight? In this article, a theoretical frame on democratic control is drawn up which is applied on the recently established Dutch system of national police. Based on an extensive multi-method field research the authors conclude that the governance of the Dutch national police is not multi-level, that centralist influences are strong, that the mechanisms for vertical integration of local concerns in national policies are weak, and that there is a democratic deficit within the Dutch police system
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