传统与非传统:对石油安全的双重解读

石油安全是关系到中国发展的一项重大议题,目前对它尚存在着不同解读,但大多把它归入非传统安全范畴。石油安全不应仅仅被视为非传统安全,事实上它早已被纳入传统安全的视野。在安全议题日益复杂化的时代背景下,运用传统与非传统安全的双重视角来考察石油安全问题,无疑具有重大意义。而且,石油安全问题的解决思路集中体现了综合安全观的发展。     

东汉雒阳县男子□□卿买地铅券研究

新发现的汉中平五年雒阳县男子□□卿买地铅券是冥世的土地私有权凭证和早期道教实施镇墓安魂、驱鬼解谪活动的遗物。买地铅券的实质是镇墓文,它袭用阳世土地买卖契约的格式,注入了冥间隔断死生、厌镇鬼神的内容。     

两件西汉时期鎏金与鎏银青铜器镀层中的金属化合物

采用金相显微分析、环境扫描电子显微镜、X-射线衍射、X-射线荧光对两件西汉时期的鎏金与鎏银青铜马镳进行了分析,揭示了西汉时期鎏金与鎏银青铜器的部分金相学特征和部分金属化合物,研究结果表明我国西汉时期已采用了金汞齐与银汞齐在铅锡铜合金表面火法鎏金和鎏银技术。     

Electrochemical Characterization and Dating of Archaeological Leaded Bronze Objects Using the Voltammetry of Immobilized Particles

The application of solid state electrochemistry techniques for the characterization and dating of leaded bronze objects is described. Characteristic voltammetric signatures of copper and lead corrosion products were used as markers of more or less prolonged corrosion periods. The proposed methodology was applied to samples from the Roman archaeological sites of Valeria (Spain) and Gadara (Jordan), Roman and medieval sites in Xàtiva (Spain), and modern statuary exhibited outdoors, on the campus of the Universitat Politècnica of Valencia, Spain, covering a time interval between the fourth to second century bc and the 20th century ad . For such samples, the ratio between the signals for copper and lead corrosion products decreased monotonically with the corrosion time. This variation was modelled on the basis of thermochemical and kinetic considerations, the experimental data being consistent with a potential rate law for the corrosion process.     

HHpXRF study of recent zinc and lead pollution on lava stepping stones from Pompeii: Tourist footfall,tyre dust and leaded petrol

A helium-enabled Niton X-ray analyser (HHpXRF) study of 296 lava stepping stones from ancient Pompeii showed that their surfaces were contaminated with superficial deposits of Zn and Pb. Recent research has shown that concentrations of these elements are highest in urban areas, where they were attributed to tyre dust and leaded petrol, respectively. The distribution of these elements on the stepping stones is represented on maps of the site. Zn pollution is most abundant in areas visited by tourists and is attributed mostly to wear from their rubber-soled footwear. Pb pollution is attributed to the movement of onsite vehicles using leaded petrol.     

敦煌学海拾贝

敦煌学内容“博大精深”。本文选择“博大”切入论题 ,从见诸史料记载的古代标点符号、财务会计学的“四柱结算法”、“市声吟叫辞”、石油和煤油、硬笔书法等的最早应用 ,纠正了过去在这些方面存在的讹误 ,为修正中国文化史有关方面存在的问题提供了可靠的依据。