Preliminary Study on Determining the Sequence of Intersecting Lines by Fluorescence Technique

The determination of the sequence of intersecting lines is an important part of questioned document examinations. A fluorescence technique was used to determine the sequence of heterogeneous intersecting lines produced using inkpad ink, stamp‐pad ink, ballpoint pens, gel pens, fountain pens, colorants of carbon paper, photocopiers, laser printers, and inkjet printers. A SteREO Discovery.V20 equipped with the ZEN Blue Lite software was chosen to perform the tests.As the results obtained from the study were positive under most conditions, the fluorescence technique was found to be very successful in determining the sequence of intersecting lines from ballpoint pen, gel pen, fountain pen, photocopier, laser and inkjet printers, and inkpad inks. The method was also successful in determining the sequence of intersecting lines from ballpoint pen, photocopier, laser printer, and stamp‐pad inks under most conditions. The technique was not successful in determining the order of crossing lines blending together.     

Visualization of Aged Fingerprints with an Ultraviolet Laser

Detection of aged fingerprints is difficult because they can degrade over time with exposure to light, moisture, and temperature. In this study, aging fingerprints were visualized by time‐resolved spectroscopy with an ultraviolet‐pulsed laser. Fingerprints were prepared on glass slides and paper and then stored under three lighting conditions and two humidity conditions for up to a year. The fluorescence intensities of the fingerprints decreased with time. Samples were stored in the dark degraded less than in sunlight or under a fluorescent lamp. Samples were stored under low humidity degraded less than under moderate humidity. As the storage period increased, a fluorescence emission peak appeared that was at a longer wavelength than the peak visible in earlier spectra. This peak was used for visualization of an aged fingerprint over time. An image of the fingerprint was not initially visible, but an image appeared as the time since deposition of the fingerprint increased.     

Hong Kong's political influence over China: institutional,informative, and interactive dynamics of sovereignty

Abstract

This article explores how Hong Kong has exercised political influence on China since the transfer of sovereignty in 1997, and tries to comprehend such seemingly impossible influences by reinterpreting the concept of sovereignty. It argues that the British Hong Kong existed as a ‘reference society’ for China's modernization and helped to change Chinese perceptions of capitalism. As this resulted in Chinese recognition of the legitimacy of Hong Kong's colonial institutions, which were featured with political legacies of civic freedom and the rule of law, it also reveals the institutional dimension of sovereignty. Secondly, the information flow from Hong Kong to China reflects a communicative (in contrast to coercive) nature of sovereignty, which highlights Hong Kong's central position in the Chinese world of information. Thirdly, Hong Kong's ongoing democratization challenges Chinese authoritarianism through societal interactions that are beyond state control. Conceptually, in this article, state sovereignty is argued as being something fluid and constantly reshaped in everyday practice with institutional, informative, and interactive dynamics; practically, it attempts to find some remaining ‘silver lining’ to the growing authoritarian Chinese clouds above Hong Kong as reversing the logic of examining external factors in democratization.     

Enhancing the Visibility of Injuries with Narrow‐Banded Beams of Light within the Visible Light Spectrum

The use of narrow‐banded visible light sources in improving the visibility of injuries has been hardly investigated, and studies examining the extent of this improvement are lacking. In this study, narrow‐banded beams of light within the visible light spectrum were used to explore their ability in improving the visibility of external injuries. The beams of light were induced by four crime‐lites^® providing narrow‐banded beams of light between 400 and 550 nm. The visibility of the injuries was assessed through specific long‐pass filters supplied with the set of crime‐lites^®. Forty‐three percent of the examined injuries improved in visibility by using the narrow‐banded visible light. In addition, injuries were visualized that were not visible or just barely visible to the naked eye. The improvements in visibility were particularly marked with the use of crime‐lites^® “violet” and “blue” covering the spectrum between 400–430 and 430–470 nm. The simple noninvasive method showed a great potential contribution in injury examination.     

毗邻朝韩海域越界捕捞活动的特点及对策研究

近年来,我国渔船在毗邻朝韩海域进行越界捕捞活动成为了影响中朝、中韩海域安全稳定的焦点问题,也是困扰我边境管理工作的重难点问题。公安边防部门作为渔船民管理的主管部门,为有效地预防和制止越界捕捞活动,应针对边防管理工作中存在的问题,结合部队的实际情况,从根本上预防和制止越界捕捞行为,有力地维护毗邻朝韩海域的安全与稳定,促进毗邻朝韩海域海洋经济可持续发展。     

在必然代替与必须利用的失衡中折翅——苏联解体的两制关系视角解读与反思

苏联在两制关系问题上长期处于一种失衡状态,斯大林时期片面强调必然代替而忽视必须利用,导致苏联社会主义建设艰难困苦,经济失力;戈尔巴乔夫时期,苏联在实践上滑入单纯注重必须利用而忽视必然代替的泥潭,这直接引发苏联上层建筑领域的波动,导致政治失向。中国特色社会主义建设必须深刻汲取苏联的教训,在必然代替与必须利用的平衡中壮大自身。     

Trace Elemental Analysis of Titanium Dioxide Pigments and Automotive White Paint Fragments for Forensic Examination Using High‐Energy Synchrotron Radiation X‐Ray Fluorescence Spectrometry*

Abstract: High‐energy synchrotron radiation x‐ray fluorescence spectrometry (SR‐XRF) utilizing 116 keV x‐rays was used to characterize titanium dioxide pigments (rutile) and automotive white paint fragments for forensic examination. The technique allowed analysis of K lines of 9 trace elements in 18 titanium dioxide pigments (rutile), and 10 trace elements in finish coat layers of seven automotive white paint fragments. High‐field strength elements (HFSE) were found to strongly reflect the origin of the titanium dioxide (TiO₂) pigments, and could be used as effective parameters for discrimination and classification of the pigments and paint fragments. A pairwise comparison of the finish coat layers of seven automotive white paint fragments was performed. The trace elements in the finish coat layers detected by the high‐energy SR‐XRF were especially effective for identification. By introducing the trace element information of primer and electrocoat layers, all the automotive white paint fragments could be discriminated by this technique.     

Determining an Optimal Sequence for Chemical Development of Latent Prints on Cartridge Casings and Shotgun Shells*,†

Abstract: In developing latent prints on cartridge casings and shotgun shells, multiple chemical processes should be used in order to obtain the best results. In Phase I, this study established an optimal chemical sequence for both Brass and Nickel cartridge casings based on six sequences involving four chemicals: Cyanoacrylate, Black Powder, Rhodamine 6G and Acidified Hydrogen Peroxide. Phase II was a validation study of Phase I involving a random sample of both Brass and Nickel cartridge casings, which were processed according to the determined optimal sequences. In addition, ribbed shotgun shells were processed under Phase I results and determined to be dependent upon the utilization of a CrimeScope at 515 nm. Consideration should be given to the type of cartridge case being examined. Although limitations exist, some chemical sequences undeniably work better than others. All photographs were manipulated with Adobe^® Photoshop^®. All results were verified by a senior latent print examiner.     

大鼠骨骼肌挫伤后细胞间黏附分子-1mRNA表达变化

目的应用荧光原位杂交（fluorescence in situ hybridization,FISH）技术检测大鼠骨骼肌挫伤后细胞间黏附分子-1（intercellular adhesion molecular—1,ICAM-1）mRNA表达。分析其与挫伤时间的关系。方法建立大鼠骨骼肌挫伤模型．分别取伤后0．5、1、6、12、18、24、30h及对照组检材。检材冰冻切片后进行FISH．激光共聚焦显微镜观察。结果大鼠骨骼肌挫伤后ICAM-1mRNA的表达6h达到峰值,18h下降至对照组的3．46倍．随后继续升高。结论大鼠骨骼肌挫伤后30h内ICAM—1mRNA的表达有一定的时间规律性．可望作为推断骨骼肌早期损伤时间的指标之一。     

公安院校思想政治教育工作的“两并举”

公安院校作为高等教育的一个重要组成部分,担负着为公安战线培养合格专门人才的重任。新形势下不断加强公安院校思想政治教育工作,提高公安大学生的思想政治素质,对加强公安队伍建设、促进公安工作发展,具有十分特殊的意义。而公安院校思想政治教育要取得实效,必须围绕政治坚定、业务精通、作风优良、执法公正的高素质公安人才的培养目标,以科学发展观统领思想政治教育工作的全局,突出特色,创新方法,实现教师思想政治教育工作与学生思想政治教育工作“两并举”。