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Some Properties of the Bel and Bel-Robinson Tensors
General Relativity and Gravitation, 1997The properties of the Bel and Bel-Robinson tensors seem to indicate that they are closely related to the gravitational energy-momentum. Some new properties of these tensors which might throw some light onto this relationship are presented. For any spacetime the authors find a natural linear decomposition of the Bel tensor in terms of the Bel-Robinson ...
Bonilla, Miguel Á. G. +1 more
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Classical and Quantum Gravity, 1997
Vf. präsentiert eine neue, für \(n\) Dimensionen verallgemeinerte Form des Bel-Robinson-Tensors, die für \(n=4\) mit der Energiedichte des Gravitationsfeldes in Zusammenhang gebracht wird.
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Vf. präsentiert eine neue, für \(n\) Dimensionen verallgemeinerte Form des Bel-Robinson-Tensors, die für \(n=4\) mit der Energiedichte des Gravitationsfeldes in Zusammenhang gebracht wird.
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Letter: Review of the Definitions of the Bel and Bel-Robinson Tensors
General Relativity and Gravitation, 2003Since the Bel and Bel-Robinson tensors were discovered in the 1950's several equivalent but different definitions have appeared in the literature. This note presents the different definitions in historical order and suggests Bel's 1962 definition to be taken as the foundation.
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Origin of Bel-W3, Bel-C and Bel-B tobacco varieties and their use as indicators of ozone
Environmental Pollution, 1991Since 1962, the tobacco variety Bel-W3 (Nicotiana tabacum L.), has been used in many countries as an indicator of the presence of phytotoxic concentrations of O(3). It is super-sensitive to O(3) and may produce easily recognizable symptoms for several weeks on the new, fully expanded leaves. Bel-B and Bel-C, tolerant and sensitive to O(3), respectively,
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Kronik bel ağrısında bel okulunun etkinliğinin değerlendirilmesi
202162 ÖZET Uludağ Üniversitesi Tıp Fakültesi Fiziksel Tıp ve Rehabilitasyon Ana Bilim Dalına bağlı bir Bel Okulunun ön hazırlığını yapmak ve kronik bel ağrılı hastalarda bel okulunun ağrı, lomber fleksibilite, yatak istirahati süresi, analjezik kullanımı ve fonksiyonel sakatlık skorlarına etkisini değerlendirmek amacıyla bu çalışmayı planladık.
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Kronik bel ağrılarında bel okulunun etkinliğinin değerlendirilmesi
202031 7. ÖZET Bu çalışma, kronik bel ağrılı hastalarda bel okulunun etkinliğini araştırmak amacıyla planlanmıştır. Çalışmaya altı aydan uzun süreli bel ağrısı ı olan 45 hasta alınmıştır. Hastalar rastgele seçimle üç gruba ayrılmıştır ; hastaların 15'ine İsveç bel okulu benzeri program, 15'ine fizik tedavi programı, 15'ine plasebo kısa dalga
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