170 research outputs found

    Melting and evaporation transitions in small Al clusters: canonical Monte-Carlo simulations

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    A dimer of bound atoms cannot melt, only dissociate. Bulk metals show a well defined first order transition between their solid and liquid phases. The appearance of the melting transition is explored for increasing clusters sizes via the signatures in the specific heat and the root mean square of the bond lengths δB\delta_{\rm B} (Berry parameter) by means of Monte-Carlo simulations of Al clusters modelled by Gupta potentials. Clear signatures of a melting transition appear for N6N\sim 6 atoms. Closed-shell effects are shown for clusters with up to 56 atoms. The melting transition is compared in detail with the dissociation transition, which induces a second and possibly much larger local maximum in the specific heat at higher temperatures. Larger clusters are shown to fragment into dimers and trimers, which in turn dissociate at higher temperatures.Comment: 6 pages, 7 figure

    Does Providing Informal Elderly Care Hasten Retirement? Evidence from Japan

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    This paper examines the implications of providing care to elderly parents for adult children’s retirement plans using micro data from a Japanese survey. We find no significant effect of caregiving on family caregivers’ planned retirement age if we do not take into account caregiving intensity but find a negative and significant effect onretirement plans for intensive caregivers, particularly among women. These findings suggest that relying on family members to provide elderly care can pose a serious challenge to the ongoing efforts of the government to promote the labor supply of women and the elderly to address the shrinkage of the working-age population in Japan. The estimation results suggest that ensuring access to formal care services can help family members reconcile their paid work with caregiving requirements, thereby alleviating the adverse effect of caregiving on their retirement plans. The results also suggest that the financial burden of formal care services could require caregivers to postpone retirement in some cases

    PENERAPAN BINMAS (BIMBINGAN MASYARAKAT) TERHADAP PERILAKU PATOLOGIS DALAM MASYARAKAT (STUDI KASUS KEPOLISIAN SEKTOR DANAU TELUK, KOTA JAMBI)

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    Penelitian ini dilatar belakangi oleh fenomena yang terjadi sekarang ini banyaknya kenakalan–kenakalan remaja. Dakwah di pandang sebagai proses pembinaan yang baik dan benar-benar harus mengacu pada nilai-nilai islam yang di terapkan sedini mungkin kepada anak-anak. Apabila proses tersebut dapat berjalan dengan baik, maka akan muncullah generasi muda yang memiliki komitmen yang kuat terhadap ajaran islam.Akan tetapi hal itu tidak mudah untuk diwujudkan sebab banyak faktor eksternal yang mempengaruhi para remaja dan memperlemah pembentukan kepribadian mereka, disamping beberapa faktor internal dalam diri mereka sendiri yang berpengaruh bagi mereka. Semakin banyak faktor yang mempengaruhi remaja dalam membentuk kepribadiannya, semakin banyak pula penyimpangan yang akan di timbulkan. Penyimpangan yang di tunjukkan oleh para remaja di sebut kenakalan remaja yang dapat menimbulkan\ud sebuah problematika remaja sehingga mengganggu diri sendiri dan orang lain. Jenis penelitian yang di gunakan adalah penelitian lapangan (field research) dengan kualitatif deskriptif, dengan mendeskripsikan Upaya Tokoh Agama Dalam Mengatasi Kenakalan Remaja. Penelitian ini menggunakan teknik purposive sampling dan snowball sampling. Pengumpulan data berupa observasi, wawancara dan dokumentasi dengan teknik analisis data yaitu reduksi data, penyajian data, danverifikasi data. Dari penelitian ini maka penulis menemukan bentuk perilaku patologis yang sering terjadi dikalangan remaja kelurahan Olak Kemang kecamatan Danau Teluk Kota Jambi ialah, perjudian, kekerasan terhadap anak, penyalahgunaan narkoba, balapanliar atau geng motor, kekerasan dalam rumah tangga. Bentuk penerapan Binmas (bimbingan masyarakat) yaitu, penerapan bimbingan masyarakat, penerapan bimbingan keamanan remaja dan wanita. Keefektifan binmas terhadap masyarakat, sangat efektif karena dalam setiap tahun tingkat masalah yang terjadi dimasyarakat semakin menurun dari kasus tersebut dapat dilihat keefektifan yang dilakukan oleh anggota bimbingan masyarakat dapat menciptakan dan mewujudkan masyarakat yang aman dan damai

    The Variations in Religious and Legal Understandings on Halal Slaughter

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    Purpose: This paper attempts to provide an overview of different understandings regarding the concept of "what constitutes halal" and "who determines this concept?" In practice, this equates to contemporary legal understandings versus religious understandings. The paper further aims to provide an overview of competing Muslim understandings regarding the concept of "What does or does not constitute halal slaughter?" In practice, this equates to evaluating the application of no stunning at all upon an animal (unanimous acceptance) versus the application of reversible stunning upon an animal (contested). Design: The study includes a review of priori literature and considers the current scenario of the halal poultry trade and raises important questions regarding Islamic dietary practices, halal food integrity, religious and animal welfare understandings. Three key questions were raised: "To what extent does stunning impact halal slaughter?’, ‘Who determines what is halal slaughter?’ and ‘What are the variations and tensions between legal and religious understandings of halal slaughter?’ Findings: The examination of such requirements and concomitant consumer and provider expectations is underpinned by a study of an operational framework, i.e. industry practices with poultry (hand slaughter, stunning, mechanical slaughter, etc.), ethical values and market forces to appraise whether there is a point of convergence for these that can be beneficial for both seller and consumer concerns. This paper has considered different perspectives on the religious slaughter and provided an overview of competing understandings regarding the above concepts. Originality/value – This study although academic and philosophical in nature, raises questions on route to suggesting future research directions. It provides real value in stimulating more research in the area of halal food production and contributes to the understanding of different slaughter requirements for religious slaughter and the meat industry. It further sheds light on not only the religious and secular legal frameworks on animal slaughter and welfare but also the variations in understanding between them and provides examples of attempts to bridge any gap. The paper highlights the importance of halal food based on religious values and its implications for wider society

    Measurement of the Strong Coupling alpha s from Four-Jet Observables in e+e- Annihilation

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    Data from e+e- annihilation into hadrons at centre-of-mass energies between 91 GeV and 209 GeV collected with the OPAL detector at LEP, are used to study the four-jet rate as a function of the Durham algorithm resolution parameter ycut. The four-jet rate is compared to next-to-leading order calculations that include the resummation of large logarithms. The strong coupling measured from the four-jet rate is alphas(Mz0)= 0.1182+-0.0003(stat.)+-0.0015(exp.)+-0.0011(had.)+-0.0012(scale)+-0.0013(mass) in agreement with the world average. Next-to-leading order fits to the D-parameter and thrust minor event-shape observables are also performed for the first time. We find consistent results, but with significantly larger theoretical uncertainties.Comment: 25 pages, 15 figures, Submitted to Euro. Phys. J.
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