• 분석과학
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• 제37권3호
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• pp.189-199
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• 2024

법유전학에서 개인의 신원확인을 위한 STR 프로필 분석이 불가한 경우, DNA를 이용한 외형추정특성을 이용하여 개인에 대한 정보를 얻을 수 있다. 최근 눈동자, 머리카락, 피부 색과 같은 외형추정특성을 확인하는 방법들이 연구되고 있지만, 이러한 외형추정특성 정보만 가지고는 한국을 비롯한 동아시아 지역에서 적용하기에는 한계가 있다. 본 연구에서는 개인의 외형과 관련된 표현형을 수사정보로서 활용하기 위해 눈 모양, 머리카락 굵기, 피부 색 뿐만 아니라 탈모, 체형, 고도근시, 얼굴모양, 여드름, 행동습관과 관련된 SNP를 탐색하였다. 이들 표현형과 관련된 50개의 SNP를 선정하여 한 번에 증폭할 수 있는 targeted amplicon NGS 방식의 multiplex PCR 패널을 개발하였다. 실험 결과 14개 샘플에서 50개 SNP의 대립유전자 유형과 빈도를 확인할 수 있었다. 향후 본 패널을 가지고 더 많은 샘플을 이용하여 유전형과 표현형 간 연관성 확인 및 결과 해석 방법을 분석할 예정이다.

• Journal of Korean Biological Nursing Science
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• 제16권3호
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• pp.211-218
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• 2014

Purpose: This research was designed to investigate the effects of forensic education and autopsy attitude of nursing students. Methods: Data on autopsy attitude were determined and collected by means of a self-reporting questionnaire including 14 questions on perception of a need for an autopsy and 11 questions on resistance to autopsy, the respondents being 846 nursing students. The collected data were analyzed by means of an independent t-test with one-way ANOVA in an SPSS WIn 18.0 program. Results: The perception of a need for an autopsy was 4.06 on average and resistance to autopsy was 2.64 on average. The nursing students taking a forensic course showed a relatively higher level of perception of the need for an autopsy (t=-5.63, p <.001) than those not attending such a course (t=2.93, p <.001). Perception of the need for an autopsy and resistance to autopsy show a negative correlation (r=-.382, p=.003). Conclusion: A forensic medicine course raises the level of perception of the need for an autopsy by nursing students and reduces the level of resistance to autopsy.

• 대한수사과학회지
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• 제1권2호
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• pp.44-56
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• 2006

The reform necessity of medicolegal death investigation system is continuously issued. The problems from the current death investigation system are discussed, specially on the professionalism of the involved personnel such as policemen, doctors, prosecutors. Death investigation exists not only to prosecute the criminals but also primarily to protect the general public's health, safety, and welfare. The reform proposals of death investigation system are followed as below. Statutes require that the prosecutor be notified of certain deaths. All deaths that may reasonably result from anything other than natural disease should be investigated. A death certificate is a legal document which authenticate a death, therefore it is issued by the doctor. The postmortem examination must be rearranged on the university base and performed by the qualified doctors who are trained at least in pathology. The police officer specified in death investigation and forensic identification should be encouraged to keep doing their special work in many ways.

• 대한임상검사과학회지
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• 제41권2호
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• pp.76-82
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• 2009

It would be one of the most important tests that determination of semen in crime scene as a matter of significant evidences. Recently, it has been developed for the identification of semen in forensic specimens which was used simply, easily and reproductively. In this study, Prostate-Specific-Antigen (PSA) Rapid Test kit was evaluated for the forensic identification of semen and compared with one step semen inspection forensic rapid test kit. The sensitivity and specificity of the rapid PSA kit were examined in addition to the stability of PSA. The positive band of rapid PSA kit shown even with 1,000,000-fold diluted semen, which was at least 100 timed higher than qualitative one step semen inspection forensic rapid test kit. PSA was detected in urine from normal male adult, however, it was not detected in urine from young boys and female body fluids. It was shown that PSA was very stable to resist boiling for 20 minutes and the effect of bacteria. In crime scene investigation, rapid PSA kit is expected to help to identify semen easily in the evidences.

• 산경연구논집
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• 제12권6호
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• pp.47-55
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• 2021

Purpose: Organizational crime is an offense committed by an individual or an official in a corporate entity for organizational gain. This study aims to explore the literature on challenges facing digital forensics and further discuss possible solutions to such challenges as far as the protection of corporate crime is concerned. Research design, data and methodology: Qualitative textual methodology matches the interpretative approach since it is a quality method meant to consider the inductivity of strategies. Also, a qualitative approach is vital because it is distinct from the techniques used in optimistic paradigms linked to science laws. Results: For achieving justice through the investigation of digital forensic, there is a need to eradicate corporate crimes. This study suggests several solutions to reduce corporate crime such as 'Solving a problem to Anti-forensic Techniques', 'Cloud computing technique', and 'Legal Framework' etc. Conclusion: As corporate crime increases in rate, the data collected by digital forensics increases. The challenge of analyzing chunks of data requires digital forensic experts, who need tools to analyze them. Research findings shows that a change of the operating system and digital evidence interpretation is becoming a challenge as the new computer application software is not compatible with older software's structure.

• Journal of Information Science Theory and Practice
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• 제12권1호
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• pp.39-59
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• 2024

An online social network is a platform that is continuously expanding, which enables groups of people to share their views and communicate with one another using the Internet. The social relations among members of the public are significantly improved because of this gesture. Despite these advantages and opportunities, criminals are continuing to broaden their attempts to exploit people by making use of techniques and approaches designed to undermine and exploit their victims for criminal activities. The field of digital forensics, on the other hand, has made significant progress in reducing the impact of this risk. Even though most of these digital forensic investigation techniques are carried out manually, most of these methods are not usually appropriate for use with online social networks due to their complexity, growth in data volumes, and technical issues that are present in these environments. In both civil and criminal cases, including sexual harassment, intellectual property theft, cyberstalking, online terrorism, and cyberbullying, forensic investigations on social media platforms have become more crucial. This study explores the use of machine learning techniques for addressing criminal incidents on social media platforms, particularly during forensic investigations. In addition, it outlines some of the difficulties encountered by forensic investigators while investigating crimes on social networking sites.

• 대한수사과학회지
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• 제1권1호
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• pp.88-91
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• 2006

• 한국재료학회지
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• 제27권8호
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• pp.431-437
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• 2017

This study investigated the surface pit corrosion of SS420J2 stainless steel accompanied by intergranular crack. To reveal the causes of surface pits and cracks, OM, SEM, and TEM analyses of the microstructures of the utilized SS420J2 were performed, as was simulated heat treatment. The intergranular cracks were found to have been induced by a grain boundary carbide of $(Cr,Fe)_{23}C_6$, which was identified by SEM/EDS and TEM diffraction analyses. The mechanism of grain boundary sensitization occurred at the position of the carbide, followed by its occurrence at the Cr depleted zone. The grain boundary carbide of $(Cr,Fe)_{23}C_6$ type precipitated during air cooling condition after a $1038^{\circ}C$ solid solution treatment. The carbide precipitate formation also accelerated at the band structure formed by cold working. Therefore, using manufacturing processes of cooling and cold working, it is difficult to protect SS420J2 stainless steel against surface pit corrosion. Several counter plans to fight pit corrosion by sensitization were suggested, involving alloying and manufacturing processes.

• 분석과학
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• 제34권3호
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• pp.122-127
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• 2021

Polyvinylpyrrolidone과 1,2-indanedione 혼합물(PVP-IND)은 감열지에 부착된 잠재지문을 현출하는데 가장 좋은 시약이라고 알려져 있다. 그러나 PVP-IND가 감열지에 부착된 혈흔지문을 증강할 수 있는지에 대해서는 알려지지 않았으므로 PVP-IND의 혈흔지문 증강 능력을 연구하였다. 비교 대상으로는 감열지에 부착된 혈흔지문을 증강할 때 가장 우수한 성능을 나타낸다고 알려진 amido black 수용액을 이용하였다. 그 결과, 물에 희석된 혈액이 묻은 손가락으로 만든 혈흔지문을 증강할 경우에는 PVP-IND가 amido black 수용액보다 증강 능력이 우수했다. 반면 희석되지 않은 혈흔지문을 PVP-IND로 처리하면 융선이 번져 나타나서 amido black 수용액의 증강 능력이 우수했다. PVP-IND로 처리했을 때 융선이 번져서 나타나는 것은 PVP와 혈액에 포함된 amino acid가 반응했기 때문인 것으로 추정된다.

• 분석과학
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• 제35권6호
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• pp.237-241
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• 2022

유리 표면에 부착된 지문을 인화성액체(휘발유, 등유, 경유 혹은 신너)로 오염시킨 후 hexane 혹은 heptane으로 세척하였을 때의 세척 효과를 연구하였다. 이 때 지문은 cyanoacrylate fuming 후 basic yellow 40으로 염색하는 방법으로 가시화하였다. 한 지문을 4등분하여 세척 효과를 비교한 결과 지문 성분이 인화성액체에 용해되어서 융선이 훼손된다는 것을 확인할 수 있었다. 이렇게 인화성액체로 오염된 지문을 hexane이나 heptane으로 세척한 결과 휘발유, 등유 및 신너로 오염되었던 지문은 오염 당시에 융선이 훼손되어서 세척 효과가 나타나지 않았고, 경유로 오염되었던 지문에서만 세척 효과가 나타나 융선의 품질이 향상되었다. 오히려 세척용액으로 사용한 hexane과 heptane은 융선을 훼손시키기 때문에 휘발유, 등유 및 신너로 오염된 지문은 세척과정을 생략하고 바로 증강하는 것이 오히려 낫다는 것을 알 수 있었다. 또한 경유로 오염된 지문을 세척할 때에는 세척용매의 양과 접촉 시간을 최소로 해야 한다는 것을 알 수 있었다.