• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.284.3-285
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• 2002

Paraquat(methyl viologen) is a bis-quaternary ammonium compound as a wide range herbicide. which was first introduced as an oxidation-reduction indicator dye. When paraquat(fatal dose. 1-2g) was administered to men, the oxido-reduction system of cell was repeatedly acted to perpetuate the cell membrane system, Many death cases had been occurred after ingestion of paraquat around Daejon area for the last six months. (omitted)

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.284.2-284.2
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• 2002

Gastric contents and blood samples are generally analyzed for the detection of the Drug-toxic substances(DTS) in the postmortem specimens, but tissue specimens from postmortem for the detection of the DTS are, especially, required in the cases that analysis of DTS in blood or gastric contents is impossible because of insufficient or inaccessible specimens in special cases. (omitted)

• 한국인터넷방송통신학회논문지
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• 제16권5호
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• pp.49-54
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• 2016

디지털 증거를 다루는 범죄 사건 수사가 증가함에 따라 초동조치를 할 수 있는 인력과 개선된 수사절차 모델의 필요성이 증가하고 있다. 최근 들어 디지털 포렌식 분류(triage)와 예비분석 등의 개념이 수사 연구기관에 각광을 받고 있다. 하지만 초동조치 대응인력 및 예비분석관들이 구체적으로 어떤 훈련을 받아야 하는지에 대한 연구는 그다지 주목받지 못했다. 오히려 많은 조직에서 초동조치 대응인력이 전문적인 디지털 포렌식 분석관과 같은 실력을 갖추어야 한다고 여기고 있다. 본 연구에서는 '이상적인' 상황에서 디지털 수사의 초동조치 대응인력과 예비분석관들이 어떤 능력을 갖추어야 하며, 하드웨어 및 소프트웨어 측면에서의 필요사항과, 어쩌면 가장 중요하다 할 수 있는 교육훈련 조건에 대해 논하고자 한다.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2017년도 추계학술발표회
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• pp.78-78
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• 2017

• Structural Engineering and Mechanics
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• 제47권2호
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• pp.247-263
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• 2013

It is evident that torsional resistance of a reinforced concrete (RC) member is attributed to both concrete and steel reinforcement. However, recent structural design codes neglect the contribution of concrete because of cracking. This paper reports on the results of an experimental and numerical investigation into the torsional capacity of concrete beams reinforced only by longitudinal rebars without transverse reinforcement. The experimental investigation involves six specimens tested under pure torsion. Each specimen was made using a cast-in-place concrete with different amounts of longitudinal reinforcements. To create the torsional moment, an eccentric load was applied at the end of the beam whereas the other end was fixed against twist, vertical, and transverse displacement. The experimental results were also compared with the results obtained from the nonlinear finite element analysis performed in ANSYS. The outcomes showed a good agreement between experimental and numerical investigation, indicating the capability of numerical analysis in predicting the torsional capacity of RC beams. Both experimental and numerical results showed a considerable torsional post-cracking resistance in high twist angle in test specimen. This post-cracking resistance is neglected in torsional design of RC members. This strength could be considered in the design of RC members subjected to torsion forces, leading to a more economical and precise design.

• Computers and Concrete
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• 제15권3호
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• pp.391-410
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• 2015

One of the most common applications of ferrocement is the manufacturing of thin stiffened plates which are prone to buckling. This study focuses on the investigation of the behavior of a ferrocement plate, stiffened in both directions by means of an appropriate grid of ribs. In the present paper detailed three-dimensional numerical Finite Element models are formulated for the simulation of the behavior of the structure under study, which are able to take into account both the geometric and material non-linearities that are present in the subject at hand (plasticity, cracking, large displacements). The difference among the formulated models lies on the use of different types of finite elements. The numerical results obtained by each model are compared and the most efficient model is determined. Finally, this model is in the sequel used for the further investigation of the effect of different parameters on the ultimate load capacity, such as the initial out-of-plane imperfection of the plate and the interaction between the axial loads in both directions.

• 한국항해항만학회지
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• 제27권6호
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• pp.605-610
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• 2003

According to SOLAS Convention, a voyage data recorder(VDR) is to be fitted onboard ships to assist in the marine casualty investigation However, a review of Korean Maritime Safety tribunal(KMST), shows that the current VDR systems is inconvenient in practical because the storage format of VDR and the casualty reproduction method are different from one manufacturer to another making it economically and timely difficult for the maritime casualty investigation bodies to carry out investigation in a proper manner. To solve this problem, this paper proposed a newly designed VDR Analysis System(VDRAS), which decodes the voyage data of VDR producea by different manufacturers, reproduces the condition at the time of casualty in an accurate, and performs necessary checks.

• 자동차안전학회지
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• 제13권4호
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• pp.66-72
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• 2021

This study was initiated to improve of the defect investigation method using event data recorders (EDR) and suggested a solution through the regulation and system analysis of EDR. The EDR data has been used for various purposes such as the vehicle defect investigation and the traffic accident investigation. However the EDR regulation has not been updated since the implementation in 2012. "Trigger Threshold" can be used to analyze a single accident such as the frontal crash, the side crash, and the rollover. In the case of a complex accident in which a rollover accident and a crash accident occur simultaneously, it is difficult to analyze a complex accident due to current "Trigger Threshold". This study proposed the method of separating the "Trigger Threshold" into a crash accident and a rollover accident so that accidents can be analyzed using the EDR data even when a complex accident occurs. In addition, it proposed the improvement method to quickly use the data of EDR in accident reconstruction software.

• 한국화재조사학회학술대회
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• 한국화재조사학회 2010년도 제 19회 춘계학술대회
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• pp.56-65
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• 2010

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.207-215
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• 2005

This paper presents a case history of a geosynthetics-reinforced segmental retaining wall, which collapsed during a sever rainfall immediately after the completion of the wall construction. In an attempt to identify possible causes for the collapse, a comprehensive investigation was carried out including physical and strength tests on the backfill, stability analyses on the as-built design based on the current design approaches, and slope stability analyses with pore pressure consideration. The investigation revealed that the inappropriate as-built design and the bad-quality backfill were mainly responsible for the collapse. This paper describes the site condition including wall design, details of the results of investigation and finally, lessons learned. Practical significance of the findings from this study is also discussed.