RIA: The Role of Lubricant Viscosity in the Frictional Behavior of the Magnetic Slider/Disk

本项目将继续对史前的ESR测年研究， 考古遗址和原始人遗址 能量储存在自然 由于自然放射性的轰击而产生的物质。 储存的能量随着时间的推移而增加， 以确定材料的年龄。 存储量 能量可以由电子自旋的强度来确定 共振（ESR）信号显示这些材料。 ESR测年 可以应用于大型哺乳动物的牙釉质， 在火中加热过 牙釉质通常 在考古和原始人类遗址中发现， ESR的时间范围从几千到超过三百万 精度为+5至10%。 燃烧的燧石和石英 在考古遗址中也很常见 ESR测年法 成功应用于欧洲、非洲和 亚洲，并促成了一个革命性的新观点， 现代人的出现。本项目将继续研究 ESR分析方法及其现场应用 美国考古学家和人类学家正在研究 位于加拿大汉密尔顿的麦克马斯特大学的实验室是 北美唯一一家进行此类分析的实验室， 被公认为世界范围内的重要性， 人类进化的一部分。

This project will continue research on ESR dating of prehistoric archeological and hominid sites. Energy is stored in natural materials as a result of bombardment by natural radioactivity. The amount of stored energy increases with time and can be used to determine the age of the material. The amount of stored energy can be determined from the intensity of an electron spin resonance (ESR) signal displayed by these materials. ESR dating can be applied to tooth enamel of large mammals, and to quartz which has been heated in fires. Tooth enamel is very commonly found in archaeological and hominid sites, and can be dated by ESR over a time range from a few thousand to over three million years with a precision of + 5 to 10%. Burnt flint and quartz are also common in archaeological sites. ESR dating has been successfully applied to prehistoric sites in Europe, Africa and Asia, and has contributed to a revolutionary new view of the emergence of Modern Man. This project will continue research on methods of ESR analysis and application of the methods to sites now being studied by U.S. archaeologists and anthropologists. The laboratory at McMaster University, Hamilton, Canada, is the only lab in North America carrying out such analyses, which have been recognized world-wide for their importance to the chronology of human evolution.