侦查权的性质辨析

刑事诉讼是行使国家刑罚权的活动,侦查权是刑事诉讼中的重要国家权力。长期以来,我国理论界与实务界对于侦查权性质的认识与定位一直存在争议、侦查权的性质界定不仅关乎理论的认识问题,而且关涉司法的实践问题。侦查权是一项行政权,具有行政权的性质。     

论秘密侦查的存在基础

秘密侦查是我国侦查实践中一种功效卓著的特殊侦查手段,但由于人们认识上的误区,始终没有赋予这种手段以公正合理的地位。文章拟从学理依据及法治化前提的角度探讨秘密侦查措施存在的正当、合法性的基础。     

莫达非尼药片的激光共聚焦显微拉曼光谱快速检验

目的建立莫达非尼药片的拉曼光谱快速定性检验方法。方法莫达非尼对照品和药片检材分别研磨后经拉曼光谱检验得到拉曼谱图。结果经比较,二者图谱一致,确定检出莫达非尼成分,结果可靠。结论莫达非尼药片在本文所述的条件下有较好的响应,峰型较好,峰位准确,同时药片中的淀粉等物质干扰较小。本文所建立的拉曼光谱检验方法,简便、高效、准确,可供一线执法、检验部门对查获的莫达非尼药片进行快速的定性检验。     

Scalable code clone search for malware analysis

Reverse engineering is the primary step to analyze a piece of malware. After having disassembled a malware binary, a reverse engineer needs to spend extensive effort analyzing the resulting assembly code, and then documenting it through comments in the assembly code for future references. In this paper, we have developed an assembly code clone search system called ScalClone based on our previous work on assembly code clone detection systems. The objective of the system is to identify the code clones of a target malware from a collection of previously analyzed malware binaries. Our new contributions are summarized as follows: First, we introduce two assembly code clone search methods for malware analysis with a high recall rate. Second, our methods allow malware analysts to discover both exact and inexact clones at different token normalization levels. Third, we present a scalable system with a database model to support large-scale assembly code search. Finally, experimental results on real-life malware binaries suggest that our proposed methods can effectively identify assembly code clones with the consideration of different scenarios of code mutations.     

职务犯罪侦查工作保障机制完善探析

当前,影响职务犯罪侦查工作发展的消极制约因素主要体现在侦查措施手段滞后、信息查询机制不顺、领导不当干预、基础力量保障不足、司法协作途径不畅、机构设置有待整合等方面。因而,有必要采取适当措施,切实提升侦查措施的综合运用效能、健全信息查询检索评判机制、规范党内请示报告机制、加强检察基础建设机制、畅通检察执法协作协调机制、有效整合内部司法资源。     

Classification algorithm using halftone features of counterfeit bills and CNN

With recent advancements in image processing and printing technology, home printers have improved in performance and grown more widespread. As such, they have been increasingly used in counterfeiting and forgery. Most counterfeit bills in Korea have been created using home scanners and printers. The identification of printer model is thus necessary to rapidly track down criminals and solve crimes. Household printers can be largely divided into inkjet and laser printers. These two types of printers print halftone textures instead of continuous images. This study proposed a technique of printer classification based on halftone textures that can be observed in printed documents. Since halftone textures are expressed as periodic lattices, the images were transformed via FFT, which is highly effective at expressing periodicity. ResNet, known for its superior gradient flow, was used for training. The experiment was conducted on 12 color laser jets and 2 inkjets. Scans of bills printed by each printer were used, and halftone texture analysis was performed on these images for printer model classification. Each image was cropped into several parts; one of the cropped parts was analyzed. The analysis showed that laser printers could be 100% distinguished from inkjet printers. An accuracy of 98.44% was achieved in make classification. When 50 cropped images were used instead of a single image, the technique achieved 100% accuracy in model classification. The proposed technique is non-destructive; it offers high accessibility and efficiency as it can be performed using a scanner alone, without requiring additional optical equipment.     

Mechanisms underlying response bias in deception detection

Abstract

The present research aims to explore the mechanisms underlying response bias in detection of deception. In addition to examining the predictive value of generalized communicative suspicion (GCS), age, and professional experience, the present approach also investigates the role of error weighting by testing the hypothesis that a greater concern about Misses is associated with a lie bias. In Study 1, we analyzed samples of (a) students, (b) police trainees, and (c) police officers. Results revealed an asymmetrical error weighting as the strongest predictor of response bias. Supporting our hypothesis, participants who were more concerned about False Alarms were particularly truth biased, whereas a lie bias was observed among those who were more concerned about Misses. In Study 2, we manipulated the error weighting in order to test its causal relation to response bias. Results again show the predictive value of asymmetrical error weighting for response bias in deception detection, and indicate that the effects of the manipulation are moderated by individuals' habitual error weighting.     

Who should I look at? Eye contact during collective interviewing as a cue to deceit

Pairs of liars and pairs of truth tellers were interviewed and the amount of eye contact they made with the interviewer and each other was coded. Given that liars take their credibility less for granted than truth tellers, we expected liars to monitor the interviewer to see whether they were being believed, and to try harder to convince the interviewer that they were telling the truth. It was hypothesised that this monitoring would manifest itself through more eye contact with the interviewer and less eye contact with each other than in the case of truth tellers. A total of 43 pairs of participants took part in the experiment. Truth tellers had lunch in a nearby restaurant. Liars took some money from a purse, and were asked to pretend that instead of taking the money, they had been to a nearby restaurant together for lunch. Pairs of liars looked less at each other and displayed more eye contact with the interviewer than pairs of truth tellers. The implications of these findings are discussed.     

溺死尸体器官硅藻检出率季节性差异

目的 研究溺水死亡者肺、肝、肾、骨髓等器官淡水硅藻检出率可能存在的季节性差异,为法医学解决水中尸体死因鉴定提供技术帮助与科学证据.方法 收集2009～2011年1、4、7、10月沈阳市浑河中溺死尸体每月(组)各5例;45只家兔分相应月份生前、死后入水组及对照组,分别于当月发现水中尸体后第2天入水,取人及兔肺、肝、肾、股骨骨髓及现场水样备检,应用酶消化法检测各组器官中硅藻数量、种属并与现场水样比对.结果 各组溺死尸体肺中均检出多量硅藻且种属与现场水样一致,春、秋及冬季溺死尸体肝、肾中仅可检出少量体积较小的小环藻等中心纲硅藻,夏季肝、肾及骨髓中均未检出硅藻;各组溺死家兔肺中均检出少量小环藻等中心纲硅藻,肝、肾及骨髓中未检出硅藻.结论 硅藻种群的季节性变化及不同种群硅藻体积的差异可能造成肝、肾等大循环器官中硅藻检出率的季节性差异;仅肺中检出硅藻,肝、肾中硅藻检验结果阴性并不能排除溺死可能.