We describe a duality transformation in a cosmological model of four time and four space dimensions ((4 + 4)-dimensions)......

Initiation, growth, and rupture of cerebral aneurysms are caused by hemodynamic factors. It is extensively accepted that......

通过局部惯性系，把狭久相对论中异地两点同时性的定义推广到引力场中，导出用坐标时表示引力空间同时性的关系式，说明引力场中空间距离......

Background: 4D-CT has been used to localize the parathyroid adenomas and hyperplasia since 2006 as a second line study a......