نتایج جستجو برای: Accioly
تعداد نتایج: 10 فیلتر نتایج به سال:
It is shown that the exact Foldy-Wouthuysen transformation for spin-0 particles on spacetimes described by the metrics ds = V dt −W dx, where V = V (x) and W = W (x), only exists if the scalar field is nonminimally coupled to the Ricci scalar field with a coupling constant equal to 1 6 . The nonminimal coupling term, in turn, does not violate the equivalence principle. As an application we obta...
Este artigo tem por objetivo analisar a estetização da violência presente na obra do alagoano Breno Accioly, através recorte que traceja linguagem literária no conto Zoraide Colhe Margaridas , Os cata-ventos (1999). Accioly pertence à geração modernista de 45 e apresenta uma forte influência barroca sua estética que, interligada fatores sociais, culturais memorialistas, conduzem o seu estilo. A...
N. Locatelli, A. Mizrahi, A. Accioly, R. Matsumoto, A. Fukushima, H. Kubota, S. Yuasa, V. Cros, L. G. Pereira, D. Querlioz, J.-V. Kim, and J. Grollier Unité Mixte de Physique CNRS/Thales, 1 avenue A. Fresnel, Campus de l’Ecole Polytechnique, 91767 Palaiseau, France, and Université Paris-Sud, 91405 Orsay, France Institut d’Electronique Fondamentale, UMR CNRS 8622, Université Paris-Sud, 91405 Ors...
An alternate Hamiltonian H different from Ostrogradski’s one is found for the Lagrangian L = L(q, q̇, q̈), where ∂2L/∂(q̈)2 6= 0. We add a suitable divergence to L and insert a = q an d b = q̈. Contrary to other approaches no constraint is needed because ä = b is one of the canonical equations. Another canonical equation becomes equivalent to the fourth–order Euler–Lagrange equation of L. Usually, ...
The addition of a topologically massive term to an admittedly nonunitary three-dimensional massive model, be it an electromagnetic system or a gravitational one, does not cure its non-unitarity. What about the enlargement of avowedly unitary massive models by way of a topologically massive term? The electromagnetic models remain unitary after the topological augmentation but, surprisingly enoug...
The vanishing of the divergence of the matter stress–energy tensor for General Relativity is a particular case of a general identity, which follows from the covariance of the matter Lagrangian in much the same way as (generalized) Bianchi identities follow from the covariance of the purely gravitational Lagrangian. This identity, holding for any covariant theory of gravitating matter, relates t...
در این مطالعه، به منظور بررسی تغییرات خاکشناختی منطقة حسینآباد حپشلو در اثر کشت آتریپلکس، پس از بازدید عرصة مورد مطالعه، دو سایت نزدیک به هم هر یک به مساحت یک هکتار انتخاب شد، که در یک سایت بوتهکاری با گونة آتریپلکس کانسنس انجام شده بود، و سایت مجاور، که شاهد درنظر گرفته شد، فاقد بوته بود. با روش تصادفی- سیستماتیک و با استقرار 3 ترانسکت به طول 100 متر در هر سایت نمونهبرداری انجام شد. در سا...
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