塑造民警时代精神打造一流警察队伍——论弘扬和培育新时期江苏监狱民警精神

监狱民警精神是民警队伍建设和监狱事业赖以生存和发展的灵魂和支柱。弘扬和培育新时期江苏监狱民警精神，有必要对该精神的内涵和监狱民警精神的概念、特点进行辨析．深刻把握监狱民警精神的功能，充分认识塑造监狱民警精神的重要性和必要性。同时，结合江苏监狱工作形势发展的实际，其对江苏监狱警察精神进行了提炼和内涵解读，对弘扬和培育民警精神的途径进行了阐述。     

DNA Analysis of Natural Fiber Rope*

Abstract: When rope is found at a crime scene, the type of fiber is currently identified through its microscopic characteristics. However, these characteristics may not always unambiguously distinguish some types of rope from others. If rope samples contain cells from the plants of origin, then DNA analysis may prove to be a better way to identify the type of rope obtained from a crime scene. The objective of this project was to develop techniques of DNA analysis that can be used to differentiate between ropes made from Cannabis sativa L. (hemp), Agave sisalana Perrine (sisal), Musa textilis Née (abaca, “Manila hemp”), Linum usitatissimum L. (flax), and Corchorus olitorus L. (jute). The procedures included extracting the DNA from the rope, performing polymerase chain reaction (PCR) using the extracted DNA as a template, and analyzing the DNA products. A primer pair for PCR, chosen from within a chloroplast gene for the large subunit of ribulose bisphosphate carboxylase/oxygenase, was designed to be specific for plant DNA and complementary to the genes from all five plants. The resulting PCR fragments were approximately 771 base pairs long. The PCR fragments, distinguished through base sequence analysis or restriction enzyme analysis, could be used to identify the five different rope types. The procedure provides a useful addition to visual methods of comparing rope samples.     

女性与科学关联探析

女性与科学是研究科学及科学史问题的重要内容。国内外学者近年来,围绕女性与科学发表了大量的文章,本文着重从"人类发展的需要、社会进步和时代发展的需要、女性求知需要、自我实现需要"和"传统科学发展存在偏差、女性有未开发的智力和性别优势、女性有独特的关注内容、研究方法"等女性与科学关联的角度进行剖析,为女性进入科学提供一个新的合理性和内在逻辑可能。     

大连地区不同职业人群语音特点分析

文章运用社会语言学的做法，采集大连市内四区100个大连生、大连长的，不同职业人群的语音进行了分析，运用数学方法统计其在不同语体中普通话语音变体的百分比，目的在于侦破利用言语进行作案的案件时，为分析犯罪嫌疑人职业特点提供科学依据。     

Differentiation between drug use and environmental contamination when testing for drugs in hair

The differentiation between systemic exposure and external contamination for certain drug groups has been frequently referred to as one of the limitations of in drug testing in hair. When hair samples are used, three steps are usually employed in order to minimise the possibility of external contamination causing a misinterpretation. The first consists of decontaminating hair samples by washing the hair before analysis, the second is the detection of the relevant metabolites in the hair samples and the third is the use of cut-off levels. Difficulty in the interpretation arises when metabolites are not detected either due to external contamination of the hair or low doses of the drugs used. A wash protocol needs to be practical and ideally remove any drug deposited on the external portion of the hair.     

刑事化验常见化学概念辨析

刑事化验常涉及较多的化学理论知识。对常见的、容易混淆的、有联系又有区别的十六个化学概念进行辨析。     

DNA recovery after sequential processing of latent fingerprints on copy paper

Forensic examiners must determine whether both latent fingerprint development and DNA profiling can be performed on the same area of an evidence item and, if only one is possible, which examination offers the best chance for identification. Latent fingerprints can be enhanced by targeting different components of fingerprint residues with sequential chemical treatments. This study investigated the effects of single-reagent and sequential latent fingerprint development processes on downstream DNA analysis to determine the point at which latent fingerprint development should be stopped to allow for DNA recovery. Latent fingerprints deposited on copy paper by one donor were developed using three sequential processes: 1,8-diazafluoren-9-one (DFO) → ninhydrin → physical developer (PD); 1,2-indanedione-zinc (IND-Zn) → ninhydrin → PD; and IND-Zn → ninhydrin → Oil Red O (ORO) → PD. Samples were examined after the addition of each chemical treatment. DNA was collected with cotton swabs, extracted, quantified, and amplified. DNA yields, peak heights, number of alleles obtained, and percentage of DNA profiles eligible for CODIS upload were examined. DNA profiles were obtained with varying degrees of success, depending on the number and type of treatments used for latent fingerprint development. The treatments that were found to be the least harmful to downstream DNA analysis were IND-Zn and IND-Zn/laser, and the most detrimental treatments were DFO, DFO/laser, and PD. In general, as the number of treatments increase, the opportunities for DNA loss or damage also increase, and it is preferable to use fewer treatments when developing latent fingerprints prior to downstream DNA processing.     

An investigation into the accuracy of follow-on GPRS/mobile data CDRs

This study investigated the accuracy of 3G and 4G follow-on GPRS (General Packet Radio Service)/mobile data CDRs (Call Detail Records) from three UK mobile network operators (EE, Vodafone and Three). Follow-on GPRS/mobile data CDRs are currently considered to be more open to misinterpretation than voice/SMS CDRs as uncertainties exist regarding the correspondence between the timestamp and the Cell ID presented within the CDRs. Consequently, follow-on GPRS/mobile CDRs may be disregarded during criminal investigations, potentially losing valuable intelligence and evidence. To assess the accuracy of follow-on GPRS/mobile data CDRs, connected mode RF (Radio Frequency) surveys were conducted while simultaneously producing follow-on GPRS/mobile data CDRs in a travelling vehicle. This allowed a comparison of the start Cell ID presented in the CDR and the Cell ID that provided coverage to the device at the start time of the CDR to assess the correspondence between the timestamp and the Cell ID presented within the CDRs, and to consider the validity of the terminology used by experts. It was found that individual follow-on GPRS/mobile data CDRs cannot consistently place a device within the coverage area of the start Cell ID at the start time of the CDR. Instead, the results indicate that a terminology which places the device within the coverage area of the start Cell ID ‘at or before’ the start time of the CDR is appropriate. It is crucial that follow-on GPRS/mobile data CDRs are analysed with this consideration in mind so to interpret the evidence correctly.     

Genetic analysis instrumentation innovations built into the SeqStudio ™ Flex Genetic Analyzers

The new Applied Biosystems™ SeqStudio ™ Flex Series Genetic Analyzer have improved the benchmark for research use only for Capillary Electrophoresis (CE) by providing innovative approaches to enhanced hand-free operation, flexibility, ease of use, data quality and connectivity. This newly designed 8 or 24 capillary system supports fragment sizing and DNA sequencing applications providing scientists with medium throughput technology for use in research applications. The steps from system set-up to size or base-called data have been simplified with hardware functionality and user-friendly software enhancements designed into this new CE system.We will discuss innovations related to ease of use including one button start-up, an on-board computer with touchscreen, intuitive software, easier to use capillary arrays, and desktop and cloud-based plate manager software. Innovations related to increased flexibility include continuous plate loading, automated plate linking that be able to maintain traceability from sample to result when using barcoded plates, urgent sample reprioritization, fragment and sequencing samples be run on the same plate, and multi-user support will also be discussed. In addition, gold standard fragment analysis and sequencing data quality has been enhanced through innovative algorithms providing autospectral calibrations, and off-scale recovery of data for fragment analysis. Innovative service and support functionality including remote troubleshooting with instrument system login capability, and on-board instrument help videos are included. Finally, we will touch upon new connectivity, which includes Thermo Fisher connect for remote monitoring, analysis, and data sharing as well as other functionality such as voice commands and Wi-Fi capability that the system will provide. The following summarizes highlights from the developmental validation performed to demonstrate the functionality of SeqStudio ™ Flex Series Genetic Analyzer.