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西周“三事”考  [PDF]
钱大群
法学研究 , 1982,
Abstract: 在谈到西周奴隶制国家的国家机构时,近年来一些史学著作及高等学校的中国法制史教材,都提到了“三事”及“三事大夫”的问题。正确解释“三事”及“三事大夫”对认识西周奴隶制国家机构的特点有很大意义。可是目前有关这个问题的解释,很多说法还应该认真地作进一步的推敲。
“事企融合”与“事企分开”  [PDF]
张光阳
科技进步与对策 , 1998,
Abstract: 通过对湖北省农业科学院畜牧所和果茶所“事企融合”和“事企分开”改革的内容、特点及效果进行比较分析,指出存在观念滞后、改革不配套等问题,提出了要从解放思想、更新概念;优化外部环境;培植有科研优势的支柱产业;与社会资金开放式重组等方面深化改革,以增强农业科研单位综合实力,提高自我发展能力。农业科研改革农业科学研究所体制改革
Quantized Fields and Chronology Protection  [PDF]
William A. Hiscock
Physics , 2000,
Abstract: Several recent possible counterexamples to the Chronology Protection Conjecture are critically examined. The ``adapted'' Rindler vacuum state constructed by Li and Gott for a conformal scalar field in Misner space is extended to nonconformally coupled and self-interacting scalar fields. For these fields, the vacuum stress-energy always diverges on the chronology horizons. The divergence of the vacuum stress-energy on Misner space chronology horizons cannot be generally avoided by choosing a Rindler-type vacuum state.
The quantum physics of chronology protection  [PDF]
Matt Visser
Physics , 2002,
Abstract: This is a brief survey of the current status of Stephen Hawking's ``chronology protection conjecture''. That is: ``Why does nature abhor a time machine?'' I'll discuss a few examples of spacetimes containing ``time machines'' (closed causal curves), the sorts of peculiarities that arise, and the reactions of the physics community. While pointing out other possibilities, this article concentrates on the possibility of ``chronology protection''. As Stephen puts it: ``It seems that there is a Chronology Protection Agency which prevents the appearance of closed timelike curves and so makes the universe safe for historians.''
On the Astronomical Records and Babylonian Chronology  [PDF]
V. G. Gurzadyan
Physics , 2003,
Abstract: We outline the priority of high quality data of astronomical content as our strategy for the analysis of the ancient astronomical records in the search of the absolute chronology of the Near East in II millennium BC. The correspondingly defined set of data for two lunar eclipses of EAE 20 and 21 tablets linked to Ur III period enables us the choice of eclipses of 27 June 1954 BC and 17 March 1912 BC; here the information on the exit position of the darkening of the lunar disk acts as a crucial informator survived in the records. We then discuss why the 56/64 year Venus cycle cannot be traced in the Venus Tablet and therefore cannot serve as an anchor for the search of chronologies. The month length method is discussed as well. In sum the available data support the Ultra-Low Chronology proposed in the book by H.Gasche, J.A.Armstrong, S.W.Cole and V.G.Gurzadyan, "Dating the Fall of Babylon" (1998) and, particularly, leave no astronomical background for the High Chronology. Ultra-Low Chronology is supported also by archaeological, dendrochronological, Assyrian king lists and other data as summarized at the Intern. Colloquium on Ancient Near Eastern Chronology (Ghent, July, 2000).
Astronomical Dating and the Internal Chronology of the Pentateuch  [PDF]
Pierfrancesco La Mura
Physics , 2011,
Abstract: Some of the narratives in the Pentateuch can be associated with known astronomical events to provide absolute dates for biblical chronology.
Cosmic Strings and Chronology Protection  [PDF]
James D. E. Grant
Physics , 1992, DOI: 10.1103/PhysRevD.47.2388
Abstract: A space consisting of two rapidly moving cosmic strings has recently been constructed by Gott that contains closed timelike curves. The global structure of this space is analysed and is found that, away from the strings, the space is identical to a generalised Misner space. The vacuum expectation value of the energy momentum tensor for a conformally coupled scalar field is calculated on this generalised Misner space. It is found to diverge very weakly on the Chronology horizon, but more strongly on the polarised hypersurfaces. The divergence on the polarised hypersurfaces is strong enough that when the proper geodesic interval around any polarised hypersurface is of order the Planck length squared, the perturbation to the metric caused by the backreaction will be of order one. Thus we expect the structure of the space will be radically altered by the backreaction before quantum gravitational effects become important. This suggests that Hawking's `Chronology Protection Conjecture' holds for spaces with non-compactly generated Chronology horizon.
Constraining the Cratering Chronology of Vesta  [PDF]
David P. O'Brien,Simone Marchi,Alessandro Morbidelli,William F. Bottke,Paul M. Schenk,Christopher T. Russell,Carol A. Raymond
Physics , 2014, DOI: 10.1016/j.pss.2014.05.013
Abstract: Vesta has a complex cratering history, with ancient terrains as well as recent large impacts that have led to regional resurfacing. Crater counts can help constrain the relative ages of different units on Vesta's surface, but converting those crater counts to absolute ages requires a chronology function. We present a cratering chronology based on the best current models for the dynamical evolution of asteroid belt, and calibrate it to Vesta using the record of large craters on its surface. While uncertainties remain, our chronology function is broadly consistent with an ancient surface of Vesta as well as other constraints such as the bombardment history of the rest of the inner Solar System and the Ar-Ar age distribution of howardite, eucrite and diogenite (HED) meteorites from Vesta.
Chronology violation and the Cosmological Argument  [PDF]
G. E. Romero
Physics , 2003,
Abstract: The Kalam Cosmological Argument is perhaps the most solid and widly discussed argument for a caused creation of the universe. The usual objections to the argument mainly focus on the second premise. In this paper we discuss the dependency of the first premise on the topological structure of the space-time manifold adopted for the underlying cosmological model. It is shown that in chronology-violating space-times the first premise is also violated. The chronology-violation, in turn, requires a massive violation of the so-called energy conditions which could have observational effects that are briefly discussed here. Hence, astronomical observations could be relevant for the validity of the metaphysical argument. In this sense, it is possible to talk of "observational theology".
Chronology Protection in Generalized Godel Spacetime  [PDF]
Wung-Hong Huang
Physics , 2002, DOI: 10.1103/PhysRevD.60.067505
Abstract: The effective action of a free scalar field propagating in the generalized Godel spacetime is evaluated by the zeta-function regularization method. From the result we show that the renormalized stress energy tensor may be divergent at the chronology horizon. This gives a support to the chronology protection conjecture.
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