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391.
Determination of the sequence of intersecting lines using Focused Ion Beam/Scanning Electron Microscope 下载免费PDF全文
Jiye Kim M.Sc. MinJung Kim M.Sc. JinWook An Ph.D. Yunje Kim Ph.D. 《Journal of forensic sciences》2016,61(3):803-808
The aim of this study was to verify that the combination of focused ion beam (FIB) and scanning electron microscope/energy‐dispersive X‐ray (SEM/EDX) could be applied to determine the sequence of line crossings. The samples were transferred into FIB/SEM for FIB milling and an imaging operation. EDX was able to explore the chemical components and the corresponding elemental distribution in the intersection. The technique was successful in determining the sequence of heterogeneous line intersections produced using gel pens and red sealing ink with highest success rate (100% correctness). These observations show that the FIB/SEM was the appropriate instrument for an overall examination of document. 相似文献
392.
Qiran Sun M.Sc. Yiwen Luo M.Sc. Qinghua Zhang Ph.D. Xu Yang B.Sc. Che Xu B.Sc. 《Journal of forensic sciences》2016,61(4):1116-1121
Questioned document examiners are frequently required to determine whether the questioned ink entries on a document are written with the same ink, either for forged document identification or relative ink dating. How many methods are sufficient to discriminate potentially different inks? In this paper, 18 blue ballpoint inks were first nondestructively examined with a video spectral comparator. The ink entries were subsequently extracted with organic solvents for analysis of the volatile solvents and dyes by GC/MS, TLC, and LC‐MS/MS. The 18 ink samples were divided into 10, 9, 12, and 14 categories by these four methods, respectively. With the combined results, there were only two inks that remained indistinguishable, but they were further differentiated by microscopy. Therefore, to achieve effective discrimination of ballpoint ink entries, the authors suggest that a complete examination should include an analysis of their optical features, volatile solvents, and dyes as well as the ink quality. 相似文献
393.
This article consists of statements by three young people with a passion for human rights. Two of the young people, Jude Smith (aged thirteen) and Khalil Richard (aged twenty) are members of the Sheffield Youth Cabinet. The third young person, Natasha Siguake (aged twenty), is a Young Advisor for Sheffield Futures. The three contributors talk about the human rights that are most important to them and why human rights are important for the future. 相似文献
394.
吴晓翠 《中华女子学院山东分院学报》2007,(1):65-68
近年来,高校扩招后女大学毕业生在就业中遭受性别歧视的问题日益严重。从经济学角度看,造成这种状况的原因包括:扩招背景下女大学毕业生的供过于求;政策失灵;生儿育女和操持家务等属于非市场劳动;统计性歧视等。我们应该采取针对性措施解决女大学生就业中的性别歧视问题。 相似文献