略论高校后勤文化建设的原则、内容和方法

高校后勤文化建设是高校后勤职工按照“三服务、三育人”的宗旨,在长期的管理、服务过程中逐渐形成的具有后勤特色的思想理念、价值标准、管理模式、行为规范以及与之相联系的各项制度的总和。是落实党的“始终代表中国先进文化前进方向”的具体体现,是推进后勤改革与发展的迫切需要,也是打造一支高素质后勤队伍的根本途径。本文就高校后勤文化建设问题,从遵循的原则、实施的内容以及方法、要求等方面进行了扼要的阐述。     

A Reappraisal of Developing Deciduous Tooth Length as an Estimate of Age in Human Immature Skeletal Remains

This study provides an update on a quantitative method for immature age estimation based on postnatal deciduous mandibular tooth length. Two known sex and age skeletal collections from Western Europe were sampled (n = 97). Linear regression models for age estimated were calculated for each individual tooth, each sex, and sex combined sample using classical calibration. Prediction errors, residuals, and percentage of individuals whose real age fell within the 95% prediction interval were calculated. The teeth which develop earlier in life, the incisors and the first molar, showed the greatest precision, while the canine showed the least. This method has greater applicability to archeological skeletons or to children in developing countries than for use in North American or European forensic contexts. The method can be applied to incomplete or poorly preserved remains of unknown sex, particularly when dental radiographs are not an option or when teeth have been removed from the alveolus or crypt.     

A Study of Background Levels of Antimony,Barium, and Lead on Vehicle Surface Samples by Graphite Furnace Atomic Absorption

Law enforcement agencies routinely sample for gunshot residue (GSR) by bulk techniques and often submit swabs taken from other surfaces besides the hands of the suspect shooter. This study aims to establish the prevalence of antimony, barium, and lead on normally handled automobile surfaces by graphite furnace atomic absorption analysis. No positives were determined on 50 sampled automobile surfaces above cutoff (positive) from background levels. Transfers of GSR particles from shooter hands to automobile surfaces were found to potentially allow for positive GSR determinations, but such transfers seem to be dependent on the shooting conditions and length of GSR exposure. We determined that our bulk analysis method yields an overall 87.94 ± 5.52% extraction efficiency from cotton swabs, while the LOQ determinations strengthening the fact that bulk analysis methods are valid and valuable tools for GSR investigations.     

Study of Color Laser Printer and Photocopier Class Using a Pattern Location Measurement Method

A trace code pattern location measurement approach is proposed. It includes a method that can precisely extract the trace code pattern to identify the color laser printer or photocopier class. In this study, we collected 379 samples from 15 brands, including 129 models and 196 printers or photocopiers. The trace code pattern class is identified. Four class characteristics are used to identify the print source: (i) the relation between the pattern and print output direction; (ii) observation of the shape features from among the trace code pattern units; (iii) the feature arrangement from among the trace code pattern units; and (iv) the arrangement relation of the trace code pattern. Blind testing shows that the accuracy of the proposed method is approximately 96.9% for the Questioned Document Examiners, and 84.3% in the non‐Questioned Document Examiners. It is thus an effective technique for determining a print's color laser printer or photocopier source class.     

Contactless Visualization of Latent Fingerprints on Nonporous Curved Surfaces of Circular Cross Section—A Statistical Evaluation on the Materials as Plane Mirror

A new contactless technique for latent fingerprint visualization on nonporous curved surfaces of circular cross section was introduced by Low et al. (1). The technique utilizes a plane mirror to convey the light rays toward the inspected surfaces for latent fingerprint visualization. This research activity came up as an extension of the previous study which utilized an aluminum plate as the plane mirror to illuminate the inspected surfaces. Dulling spray was used to increase the diffuse component of the reflective aluminum plate. However, the amount of dulling spray will affect the uniformity of the illumination on the inspected curved surfaces. In this study, a study on the new materials for the plane mirror was carried out. Coated aluminum, opal, and ground glass diffusers were selected as the new materials. The performance of the new materials was compared to the aluminum based on the quality of the captured images on various nonporous cylindrical surfaces. A statistical approach known as randomized complete block design was used to design the experiment. The quality of the captured images was obtained using Spectral Image Validation and Verification. Two‐way analysis of variance and Fisher's least significant difference test were used to analyze the quality of the images. From the results of the statistical analysis, coated aluminum has the best performance compared to aluminum, opal, and ground glass diffusers.     

随机模拟法进行混合样本拆分分析

目的以随机模拟法对大量混合样本拆分进行统计分析。方法在Identifiler、PP18D、AGCU EX20、PP21、AGCU EX20&AGCU 21+1等5个系统中,使用自主研发软件模拟100万组混合样本,每组逐个拆分,统计平均拆分基因座数(L)和平均拆分组合数(Π)。结果 Identifiler、PP18D、AGCU EX20、PP21、AGCU EX20&AGCU 21+1系统的L分别为4.8、5.8、6.7、7.0、11.1;Π分别为3.71×104、1.06×105、3.34×105、6.40×105、2.48×1012。结论本文结果对于混合样本拆分具有一定的指导意义。     

造作性鼓膜穿孔鉴别确认方法的研究

目的研究伤害、疾病和造作所致的鼓膜穿孔特征,为鼓膜穿孔性质的法医学鉴别确认提供理论与方法依据。方法收集全市公安机关法医鉴定2005至2017年度共3720例鼓膜穿孔的案件,通过鼓膜穿孔形态学特征,研究穿孔形成机制与致伤性质。结果鼓膜穿孔的形态特征和形成机制决定穿孔的性质,可据此得出鼓膜穿孔损伤性质的鉴别方法。结论建立了造作性鼓膜穿孔的法医学鉴定方法。     

“Just Describing is Not Enough”: Policy Learning,Transfer, and the Limits of Best Practices

Despite widespread use in the cultural field, best practices remain theoretically and empirically under-researched. The aim of this article is to achieve better understanding of their use and effectiveness in policy learning and transfer, using a case study of a cross-national policy coordination process in the European Union, the Open Method of Coordination. Using empirical data from interview and participant observation material, the article highlights several fundamental challenges of best practices, such as issues of contextualization, representativeness, and critical analysis. It finishes by offering six critical reflection questions on the use of best practices.     

侦查学研究现状评析--《侦查论坛》1-3卷论文引证情况和研究方法之分析

对三卷《侦查论坛》所刊载的三年全国侦查学术会议的参会论文的引证资料和侦查学研究群体的研究方法的分析,可以发现当前侦查学理论研究中存在着过于关注价值论意义上的形而上的理论问题,忽视认识论上的形而下的侦查实践问题研究的倾向。侦查学研究群体在知识结构上存在着对自然科学知识的欠缺,在研究方法上过多的依赖于理性思辨而缺乏实证性调查研究。侦查学理论研究之于侦查实践的意义, 就在于能够为实践提供指导,特别是能够为侦查实践部门如何提高侦查能力带来帮助。     

关于高校物资实行政府采购的思考

按照政府采购法的要求,高校物资应实行政府采购。但这一采购模式目前仍处于尝试阶段,高校采购部门对其认识也不太明确,如何正确认识、实施政府采购以及实施政府采购过程中需注意哪些问题值得我们思考。