油浸法测定玻璃折射率的不确定度评定

目的建立油浸法测定玻璃折射率不确定度的评定方法。方法按照不确定度的A类和B类评定方法,对未知玻璃折射率测定过程中不确定度分量进行计算,最终确定扩展部不确定度。结果油浸法测定玻璃折射率的扩展不确定度约为4×10-5。结论根据不确定度计算出来的折射率的变化范围与实际分析中折射率的变化范围完全吻合。     

论证明妨碍法律效果之择定——以文书提出妨碍为例

证明妨碍之构成以相对人负有相应之义务为其逻辑基点,提出义务产生于诉讼提起之时,而保存义务则始于诉讼可＂合理预期＂之际。基于救济、惩罚和阻却等三大功能目标,并充分考量证明妨碍行为本身所呈现出的三种不同样态,在择定其法律效果时,可考虑推定文书之内容为真、拟制文书之应证事实为真、罚款或强制交付和提起独立之诉等不同路径的选择适用,从而为最大限度地回复当事人之公平,实现当事人之平等接近事证,提供多重救济路径。     

玻璃雨飞溅高度及分布的实验研究

目的研究平板玻璃打碎后玻璃雨的飞溅高度及空间分布,从而为玻璃物证提取和现场分析提供依据。方法应用自制的实验装置,模拟嫌疑人手持硬物击碎窗户玻璃,收集窗户下地面上和打击者处飞溅的玻璃微粒,对颗粒大小、散布区域进行统计分析,并与通过动力学计算得出的分布进行比较。结果在距离窗户0.5m处,玻璃颗粒的飞溅高度可高于玻璃上相应来源点的高度;较小颗粒有较大的飞溅范围。结论玻璃雨颗粒大小分布和空间分布规律对于嫌疑人身上、头部玻璃物证的提取以及案件的现场分析有十分重要的意义。     

玻璃刺创形态学特点的初步研究

目的研究玻璃刺创的形态学特点。方法分别用3个厚度为0．31cm带尖状突起的啤酒瓶残端及3块厚度为0．29cm有尖的普通窗玻璃碎片按设定的不同方向刺击带皮猪肉组织,重复此过程3次,形成198例创口,观察、编号、拍照、测量各创口。结果198例创口的整体形态可分为5种类型,即“工”型、“”型、“”型、“上”型与“一”型,各型在不同刺击方向的分布上存在差异,其中前4种为主要类型,共约占总数的93％,其共同点为在损伤的中部出现了一段与损伤整体走向垂直的创口,啤酒瓶残端所致垂直创口的长度为0．31±0．Olcm（x±s）,窗玻璃碎片所致垂直创口的长度为0．29±0．Olcm（x±s）。结论损伤中部有与损伤整体走向垂直的短创口是玻璃刺创中易出现的一种形态学特点,垂直创的长度与致伤玻璃的厚度具有一致性。     

毛细管气相色谱柱的保养与维护

综述了毛细管气相色谱柱的保养与维护.就毛细管柱分析使用中常遇到的一些问题,例如如何避免色谱柱的断裂,固定相的损伤,色谱柱的污染以及如何解决一些不能避免的问题和应采取的措施、步骤.     

玻璃折射率数据处理方法初探

目的探讨玻璃折射率数据处理方法。方法将案件中收集到的45个玻璃样品和同一个车灯不同部位的45块玻璃样品进行折射率测定。用独立样本Student’st检验、welch检验以及方差分析（ANOVA）对数据进行成对检验。结果方差分析法中Dunnett’s C法处理玻璃折射率数据,有效控制了第一类和第二类错误。当α=0．05时,犯第一类错误的概率约为4．44％,犯第二类错误的概率约为3．54％。     

汽车风挡玻璃的鉴别方法研究

目的研究油浸法和X射线荧光光谱法对汽车风挡玻璃的鉴别能力。方法应用油浸法对30个风挡玻璃样品进行折射率测试，并将所得数据进行t检验分析。对不能区分的样品再用X射线荧光光谱进行元素成分分析。结果30个样品共组成的435对中，折射率t检验在置信度959／5时区分427对，其余8对通过元素成分实现区分。结论折射率测试和元素分析相结合，可对常见汽车风挡玻璃进行有效区分。     

“天花板现象“与女性领导胜任力的保障、培育与开发

女性参与和组织公共事务管理活动,是妇女参与的最高形式,在当今世界被视为提高妇女地位的重要方面,也是衡量一个国家社会发展和文明进步的标志之一。但是,我国女性在职务晋升中还存在着只能担任低层职务,或者做到一定职位后便再难晋升的"玻璃天花板"现象。本文分析了这一现象的表现、形成根源,并提出了通过提高女性领导胜任力克服"玻璃天花板"现象的对策措施。     

平板玻璃受热后折射率的变化规律初探

目的探索平板玻璃受热后折射率的变化规律。方法首先采用差示扫描量热仪测定玻璃样品的转变温度Tg,将样品加热至不同的温度(温度范围从室温到Tg以上),自然冷却至室温后再用GRIM3测量折射率。结果加热温度在Tg以下时,玻璃的折射率基本不变,加热温度在Tg以上时,折射率有明显变化。结论对于从火灾和爆炸现场提取的玻璃,在进行折射率比对时应当考虑现场高温对测量值的影响,并进行必要的修正。     

混和硅油测定玻璃折射率

目的建立混合硅油测定单纯用B油和C油无法测定的玻璃折射率的方法。方法将B油和C油分别按1:2和2:3的体积比配成两种混合硅油,用此两种混合硅油测定同一块玻璃的折射率。结果用此两种硅油测得的玻璃的折射率结果无显著性差异。该方法克服了玻璃折射率仪温度范围窄(25℃～125℃)的缺点。     

汽车玻璃贴膜紫外及可见光谱特性检验的物证价值

目的通过对汽车玻璃贴膜紫外、可见光谱特性的检验,研究其对汽车玻璃物证检验的辅助作用,证实其物证价值。方法应用紫外、可见分光光度计对55个品牌,不同型号汽车贴膜的光谱特性进行测试。结果 55个不同品牌、不同型号贴膜紫外截止波长、吸收峰数、紫外可见吸收曲线都是有差异的。结论贴膜可以通过测试紫外、可见光谱进行区别及比对检验,弥补玻璃检验的不足,起到辅助玻璃区别认定的目的。     

油浸法鉴别汽车后视镜玻璃的研究

目的研究油浸法对汽车后视镜玻璃的鉴别能力。方法应用油浸法对20种汽车后视镜玻璃进行折射率值测定并用t检验法对数据进行处理。结果在置信度为95％时，20个后视镜玻璃样品的区分率为97．9％。结论油浸法对汽车后视镜玻璃有很好的区分能力，而且使用样品量少，可以达到微克级，是一种鉴别后视镜玻璃的有效方法。     

玻璃破碎的物证分析研究

玻璃碎片及形态是案发现场常见的物证形式,开展对玻璃的物证分析研究,能够确定玻璃的来源与种类,推断玻璃破碎原因等,为案件的取证、重建和侦破提供线索和证据。简要介绍了常见玻璃的种类,分析了玻璃破碎的根本原因,总结了低速冲击和高速冲击下玻璃破碎的形态特征,还从玻璃碎片收集和检验两个方面探讨了玻璃实体物证的分析。     

基层经侦工作机制“1+N”模式初探

基层经侦工作机制的有效延伸有助于提升经侦部门的整体作战效能,将会实现打击经济犯罪的法律效果与社会效果的统一,揭示经济犯罪的发案规律,从而为有效预防和精确打击经济犯罪奠定坚实的基础。针对目前基层经侦工作机制延伸中存在的经侦职能延伸不到位、经侦协作落实不到位、经侦基础工作不到位、经侦业务考核不到位、少数经侦民警综合素质不到位等问题,提出在基层经侦大队构建"1+N"模式,即"经侦大队+六室"延伸模式,强化基层经侦工作机制。在中心基层派出所、同级行政执法部门、大型商圈、大型企业、大队内部分别建立经侦工作室、协作室、咨询室、联络室、档案室、法制室等,实现经侦工作向基层、行政执法部门及商圈、企业等延伸。     

高速动车车窗玻璃破损成因研究

本文通过对24例高速动车组车窗玻璃破损现场勘查资料的分析，归纳了车窗玻璃在非人为因素和人为因素两种不同情况下玻璃破损的特点，探讨了动车车窗玻璃破损的机理，提出了勘查此类现场的要点及防范措施。     

The random presence of glass and paint on the clothing and footwear of members of the general population: A US baseline survey at various seasons

This study assists the interpretation of glass and paint evidence by filling an existing gap in the background occurrence that reflects the socioeconomic and demographic circumstances in the United States. The collection was performed in a college US city (Morgantown, West Virginia) to determine the effect of the type of clothing worn at different seasons on the presence of glass and paint. Tape lifts and sole scrapings (1038) were collected from 210 participants and up to six clothing and footwear areas per individual. Glass fragments were analyzed via polarized light microscopy (PLM), refractive index (RI), micro-X-Ray fluorescence (μXRF), and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), while paint specimens were examined by light microscopy and infrared spectroscopy (μFTIR). Higher occurrences of glass and paint were found in the winter season. The winter collection yielded 10 glass fragments and 68 paint particles, whereas the summer collection resulted in one glass fragment and 23 paint particles. The percentage of individuals with traces varied between seasons; 7% of individuals in the winter and 0.9% in the summer had glass, whereas 36% of individuals in the winter and 19% in the summer bore paint. Lastly, when considering the overall garment and footwear areas, glass was detected in 1.4% of the winter set, compared to 0.2% in the summer collection; paint was found in 9.2% of the winter collection, whereas only 4.2% was found in the summer set. There were no instances where both glass and paint were detected on the clothing and footwear of the same individual.     

Determination of Fracture Patterns in Glass and Glassy Polymers,

The study of fractures of glass, glassy‐type materials, and plastic has long been of interest to the forensic community. The focus of this interest has been the use of glass and polymer fractures to associate items of evidence under the assumption that each fracture is different. Generally, it is well‐accepted that deviations exist; however, the emphasis has been on classifying and predicting fracture rather than determining that each fracture is different. This study documented the controlled fracture patterns of 60 glass panes, 60 glass bottles, and 60 plastic tail light lens covers using both dynamic impact and static pressure methods under closely controlled conditions. Each pattern was intercompared, and based on the limited specimens tested in this study, the results illustrate that the fracture patterns are different. Further repetitive studies, under controlled conditions, will be needed to provide more statistical significance to the theory that each fracture forms a nonreproducible fracture pattern.     

The Death of Countess Agusta in Portofino (Northern Italy) and the Soil from Two Mismatched Slippers

Abstract:  Accident, suicide, or homicide might have caused the death of Countess Agusta who fell from the 80-m tall cliff of her villa. Two mismatched slippers were recovered along the cliff. Use was made of microscope, X-ray diffractometry, scanning electron microscopy, and microprobe techniques to compare 40 mg of soil collected from the slipper soles with samples from the villa garden. Structural details of the slipper soles were consistent with the lady wearing them during the fall. Analysis of the soil residues confirmed that they originated from the garden only. The features of a few, minute glass chips adhering to the slipper soles reasonably matched those of other fragments that were found on a small ledge on the cliff beyond the garden parapet. Based on this and other evidence, the case was closed with a verdict of accidental fall.     

根据爆炸现场玻璃的破碎推算炸药量的研究

本文通过对爆炸现场玻璃破碎处冲击波峰值超压的研究,得出推算炸药量的三个计算公式,并通过实际案例的验算,对推算炸药量公式的适用范围进行了分析讨论.     

Evaluation of match criteria used for the comparison of refractive index of glass fragments

For comparative glass examinations, the refractive indices (RIs) of recovered glass fragments are often compared to a test interval defined by measurements from a broken glass object. RI measurements from five modern float glasses were used via resampling to assess the frequencies of false exclusion errors for eight test criteria as functions of the number of measurements. The test criteria were based on ranges, fixed intervals, and multiples of standard deviations of the known source measurements. The observed error rates for the eight tests studied are between zero and c. 35%, depending upon the match criteria, the number of measurements, and the RI distribution for a glass source. The results of this study can be used to predict the false exclusion rate for a test criterion under a given set of conditions or to select test criteria that result in a desired error rate for these typical sheet glasses.