关于突发公共事件处置中警方与媒体关系研究

在突发公共事件处置中,警方与媒体基于维护公共利益,在处置事件的各个方面须进行配合与协作,两者相互影响、相互制约。大众传播媒介通过收集有关警察组织形象的信息等方面对警察组织施加影响,警察组织通过警务信息公开等方式对大众传播媒介产生影响。警方与媒体在某些方面也存在着不一致,必然导致双方在某些方面的不和谐,甚至对抗和冲突。因此两者必须互信、合作,最终达到共赢的目标。     

在大型群众性活动安全保卫中如何做好服务群众工作

国家对群众性大型活动的安全管理工作以立法的方式加以调整,足以见得对群众性大型活动的高度重视。作为大型活动主管部门的政府机关——公安机关,必须不折不扣的贯彻执行《大型活动管理办法》,把《大型活动管理办法》中的服务群众立法宗旨,贯穿于大型活动保卫始终。在做好审查资质、安全许可、安全检查、安保指导的同时,必须做好大型活动现场的安全保卫工作。     

从革命党到执政党的转型——中共八大到十七大党代会报告及历届党章文本分析

经历了九十年的风雨激荡,中国共产党在时代的洪流中实践着自身的逐步转型.中国共产党从革命党到执政党的转型问题一直以来都是学界讨论的焦点问题.转型的逻辑、方式与表现都深刻地影响着中国政治道路的选择与国家的发展.从中共执政之后的历次党代会报告内容以及历届党章的文本分析中,找出中共转型的基本表征,理解中共转型的基本框架.     

群体性事件的理论探索

近年来群体性事件频发,引起了社会各界的广泛关注。由于受＂路径依赖＂和政治因素的影响,中国学术界对群体性事件的研究还只停留在描述和对策的层面,更没有形成较为成熟的理论;文章认为,群体性事件是现代化进程中社会的一个自然态,是一种动态的平衡。     

员工非财务指标披露满意度研究

国内外从未有人从员工角度进行过非财务指标披露的满意度排序研究和分组研究,从员工角度出发进行研究,是对员工所关注的反映其利益要求和实现方式信息的非财务指标披露的满意度进行的排序研究和分组研究。研究得出结论:员工对不同类的反映其利益要求和实现方式信息的非财务指标披露的满意度存在显著差异;个体和企业因素产生了员工同一类非财务指标披露的满意度差异。对满意度低的非财务指标的披露,企业应当改善其披露。对不同类别员工披露满意度存在显著差异的非财务指标,企业应当特别需要改善披露。     

The detection of multiply charged dyes using matrix-assisted laser desorption/ionization mass spectrometry for the forensic examination of pen ink dyes directly from paper

Abstract:  Laser desorption mass spectrometry (LDMS) is emerging as a technique for questioned document examination. Its use is limited to detecting ink dyes that are neutral or singly charged. Several inks contain dyes that are multiply charged and LDMS cannot be employed for their identification. We have successfully detected >20 polyionic dyes that can be used in the manufacture of inks using matrix-assisted laser desorption/ionization (MALDI) MS, directly from paper, with the matrix, 2-(4-hydroxyphenylazo)benzoic acid (HABA), and the additive, diammonium hydrogen citrate (DAHC). For example, Acid Violet 49, a charged dye containing one positively-charged site and two negatively charged sulfonate groups, cannot be detected by LDMS, but forms intact, singly charged ions in the MALDI MS experiment. The method described is also useful for identifying multiply charged dye mixtures that are used in modern pen inks.     

The fate of the chemical warfare agent during DNA extraction

Forensic laboratories do not have the infrastructure to process or store contaminated DNA samples that have been recovered from a crime scene contaminated with chemical or biological warfare agents. Previous research has shown that DNA profiles can be recovered from blood exposed to several chemical warfare agents after the agent has been removed. The fate of four toxic agents, sulfur mustard, sodium 2-fluoroacetate, sarin, and diazinon, in a lysis buffer used in Promega DNA IQ extraction protocol was studied to determine if extraction would render the samples safe. Two independent analytical methods were used per agent, selected from GC-MS, 1H NMR, 19F NMR, (31)P NMR, or LC-ES MS. The methods were validated before use. Determinations were carried out in a semi-quantitative way, by direct comparison to standards. Agent levels in the elution buffer were found to be below the detectable limits for mustard, sarin, sodium 2-fluoroacetate or low (<0.02 mg/mL) for diazinon. Therefore, once extracted these DNA samples could be safely processed in a forensic laboratory.     

Analysis of Pigmented Inkjet Printer Inks and Printed Documents by Laser Desorption/Mass Spectrometry*,†

Abstract: Anyone with a computer, scanner, and color printer has the capability for creating documents such as identification cards, passports, and counterfeit currency. Laser desorption mass spectrometry (LDMS) has been demonstrated as a powerful tool for colorant analysis. Inkjet printers are now moving largely toward the use of pigments as colorants; their insolubility makes analysis by simpler methods such as thin‐layer chromatography no longer an option. Recent developments in pigmented inkjet printer inks, such as gloss optimizers that coat pigment particles, may prohibit colorant analysis by LDMS. We demonstrate here that pigments used in inks from two Epson printers can be detected and analyzed by LDMS. Also, LDMS spectra of various colors created using a 4‐cartridge (cyan/magenta/yellow/black, CMYK) inkset are evaluated, to begin to develop an approach for unraveling LDMS data from real samples, to determine the number of inks used by a printer, and the chemical composition of the colorants.     

The Differentiation of the Volatile Organic Signatures of Individuals Through SPME-GC/MS of Characteristic Human Scent Compounds

Abstract:  Human scent evidence is utilized as an investigative tool through canine scent discriminations based on the premise that human scent is an individualizing characteristic. This study describes the development of what is effectively a human scent barcode consisting of the relative ratios of an individual's "primary odor" compounds utilized to determine a reproducible and individualizing profile which can be stored in a searchable database for a proof of concept of human scent as a biometric measure. Triplicate hand odor samples were evaluated from 10 subjects utilizing solid phase micro-extraction gas chromatography/mass spectrometry (SPME-GC/MS) and compared via Spearman Rank Correlations. Narrowing the compounds considered for each subject to only those common in all three samples, or a subject's "primary odor constituents," produced a greater degree of both individualization and discrimination; at both correlation thresholds of 0.9 and 0.8, the individuals were correctly discriminated and identified in 99.54% of the cases.     

Postmortem Blood Concentrations of R‐ and S‐Enantiomers of Methadone and EDDP in Drug Users: Influence of Co‐Medication and P‐glycoprotein Genotype

Abstract: We investigated toxicological and pharmacogenetic factors that could influence methadone toxicity using postmortem samples. R‐ and S‐methadone were measured in femoral blood from 90 postmortem cases, mainly drug users. The R‐enantiomer concentrations significantly exceeded that of the S‐enantiomers (Wilcoxon’s test, p < 0.001). The samples were divided into four groups according to other drugs detected (methadone only, methadone and strong analgesics, methadone and benzodiazepines, or methadone and other drugs). There was no significant difference in any of the R‐methadone/total methadone ratios among the four groups. The median R/S ratio was 1.38, which tends to be higher than that reported for the plasma of living subjects. In addition, we investigated whether small nucleotide polymorphisms in the MDR1 gene that encode the drug transporter P‐glycoprotein were associated with the concentrations of R‐ and S‐methadone and its metabolite 2‐ethylidene‐1,5‐dimethyl‐3,3‐diphenylpyrrolidine. No significant association was detected.