exhilaration 发表于 2025-3-26 21:16:11
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Duality and Hidden Symmetries in Gravitational Theories,ng theories in ten dimensions, hoped to be just different limits of one unique eleven dimensional theory [.]. The main role of duality is to relate two different regimes— e.g. one of weak and one of strong coupling— of these theories. In most cases duality is not a very precise concept, just because创作 发表于 2025-3-27 07:17:49
Time-Independent Gravitational Fields,eat are isolated bodies at rest or in uniform rotation in an otherwise empty universe. In such cases one expects the gravitational field to have no “independent degrees of freedom”. Very loosely speaking, the spacetime geometry should be uniquely determined by the matter content of the model under cneuron 发表于 2025-3-27 11:45:47
Gravitational Lensing from a Geometric Viewpoint, a time- like curve γ (worldline of a light source) in a 4-dimensional Lorentzian manifold (spacetime) and we investigate how many past-pointing lightlike geodesics (light rays) go from ρ to γ. If there is more than one such geodesic, then we are in a gravitational lensing situation. Among other thiendoscopy 发表于 2025-3-27 14:31:01
Tilman Mayerinterest to. .neurologists, residents and fellows, internists, and general practitioners who treat patients with neurologic disorders and other systemic autoimmune diseases..978-1-4939-5773-6978-1-60327-860-7Series ISSN 1559-0585 Series E-ISSN 2524-4043Notify 发表于 2025-3-27 18:43:25
Data Bases in Acute Medicine, seeking patterns. By contrast, computer applications in acute medicine have tended to concentrate on data acquisition, communication, calculation and transformation, control and display, and perhaps some diagnostics.蛰伏 发表于 2025-3-27 23:23:30
the aid of potentiodynamic polarization experiments and leaching tests. The investigated Fe−Ni system consisted of various amounts of pure metallic Fe, Ni, α -FeNi alloy containing maximum 5 pct Ni and γ-FeNi alloy containing cca 50 pct Ni..The polarization measurements indicate that as pure mettali碳水化合物 发表于 2025-3-28 05:01:18
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