• 대한건축학회논문집:구조계
• /
• 제35권3호
• /
• pp.3-10
• /
• 2019

On November 15, 2017, an earthquake($M_L5.4$) occurred in Pohang. Pohang earthquake was the second largest earthquake since earthquake was observed in Korea, but structural damage caused by earthquake was biggest. Structural damage caused by Pohang earthquake was mainly caused by schools and pilotis, above all damage to pilotis was outstanding. This is because area where pilotis structures are concentrated is located near epicenter, and seismic performance of pilotis structures is not excellent compared with general structures. In this study, described results of damage investigation and analysis of damage causes through analysis of pilotis Structures on 131 buildings that were investigated immediately after Pohang earthquake. In addition, cause of damage was analyzed through analysis of seismic wave. Investigation site was selected to Jangseong-dong, where damage occurred in large numbers. Damage level was classified into A, B, and C level by measuring residual crack width and story drift of structural members.

• International Journal of Railway
• /
• 제6권2호
• /
• pp.45-52
• /
• 2013

Railway construction needs vast soil investigation for its infrastructure foundation designs along the planned railway path to identify the design parameters for stability and serviceability checks. The soil investigation data are usually classified and grouped to decide design input parameters per each construction section and budget estimates. Deterministic design method which most civil engineer and practitioner are familiar with has a clear limitation in construction/maintenance budget control, and occasionally produced overdesigned or unsafe design problems. Instead of using a batch type analysis with predetermined input parameters, data population collected from site soil investigation and design load condition can be statistically estimated for the mean and variance to present the feature of data distribution and optimized with a best fitting probability function. Probabilistic approach using entire feature of design input data enables to predict the worst, best and most probable cases based on identified ranges of soil and load data, which will help railway designer select construction method to save the time and cost. This paper introduces two Monte Carlo simulations actually applied on estimation of retaining wall external stability and long term settlement of organic soil in soil investigation area for a recent high speed railway project.

• 한국지하수토양환경학회지:지하수토양환경
• /
• 제13권6호
• /
• pp.31-39
• /
• 2008

본 연구는 전국 및 경기도에서 수행한 토양오염실태조사를 평가하고 그 효율성을 제고하기 위하여 수행하였다. 2002년${\sim}$2007년 동안 경기도 및 전국의 실태조사결과 오염발견율은 전국이 2.7%, 경기도가 평균 1.9%를 나타내 일본, 미국에 비해 낮은 발견율을 나타내었다. 또한 전국의 중금속과 석유류 기준초과물질 구성 비율이 89.8%와 8.9%였는데, 이는 중금속을 대상으로 하는 표토 조사대상이 38%인 점과 석유류를 대상으로 하는 심토의 조사비중이 62%를 나타낸 것과 모순된 현상으로 심토에 대한 조사방법의 개선이 요구된다. 오염 발견율에 영향을 미치는 요소로 지점선정단계, 시료채취단계, 시료분석단계를 들 수 있으며 이중 가장 중요한 지점선정단계에 있어서 우선순위선정을 위한 방침을 제시하였다. 부연하여 사후관리를 위한 방안으로 녹색업체 부여 등의 인증 제도를 건의하였다.

• 분석과학
• /
• 제11권3호
• /
• pp.1033-1043
• /
• 1998

• 정보보호학회논문지
• /
• 제23권2호
• /
• pp.193-201
• /
• 2013

저작권자의 동의 없이 파일을 공유하는 행위는 불법이다. 그러나 BitTorrent를 통해 발생하는 불법 공유가 계속 증가하고 있다. 이러한 증가 추세에도 불구하고, 불법 공유자들을 처벌하기 위한 법적 근거와 수사 절차가 명확하지 않기 때문에 불법 공유자들을 처벌하기 어렵다. 또, 서버가 존재하지 않는 BitTorrent의 특성으로 인해 P2P를 통한 불법 공유에 대한 기존 수사절차의 적용 역시 어렵다. 본 논문에서는 BitTorrent를 이용하여 발생하는 불법 공유에 대한 형사상 수사 절차에 대해서 정립함으로서 수사절차에 적용 가능한 포렌식 프레임워크를 제시하고자 한다.

• 동의신경정신과학회지
• /
• 제32권4호
• /
• pp.329-335
• /
• 2021

Objectives: The purpose of this study was to determine how analyzing movies, including mental symptoms, according to a certain method, might affect the understanding of psychiatric disorders. Methods: Forty-four oriental medicine students who had completed Korean medicine neuropsychiatric science were required to submit reports on episode analysis, psychiatric personal history investigation, diagnostic criteria, and the connection between Korean medicine and psychiatric diseases after watching a movie, including psychiatric symptoms. After submitting the report, a questionnaire related to understanding before and after watching the movie was asked to be filled out. Demographic survey, frequency analysis, and response sample t-test were performed based on 42 questionnaires. Results: Results of analyzing the questionnaire were as follows. 1. The average number of movies watched was three. 2. Psychiatric disorders and psychiatric symptoms, diagnostic criteria, psychiatric personal investigation, and understanding of the connection between Korean medicine and psychiatric diseases all increased statistically significantly. 3. A separate process might be needed to improve the understanding of psychiatric personal strength investigation and oriental medicine connection. Conclusions: Movie analysis, including individual mental symptoms, could improve students' understanding of psychiatric disorders in psychiatric symptoms, diagnostic criteria, and psychiatric personal investigation, but some students might need feedback.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2018년도 추계 학술논문 발표대회
• /
• pp.138-139
• /
• 2018

The purpose of this study is to analyze the work of the existing manpower dependent cleaning method by investigating the window cleaning site. In this study, detailed work contents were confirmed by on-site investigation and interview with experts, and the relationship, procedure, repetition work, and time required for each work were analyzed. The future analysis results will be used as a basic data for comparative analysis of productivity and economical efficiency with the window cleaning device to be developed.

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2014년도 춘계학술대회
• /
• pp.36-37
• /
• 2014

It is necessary to develop highly sophisticated Modeling & Simulation (M&S) system for the scientific investigation of marine accident causes and for the systematic reproduction of accidental damage procedure. To ensure an accurate and reasonable prediction of marine accidental causes, such as collision, grounding and flooding, full-scale ship M&S simulations would be the best approach using hydrocode, such as LS-DYNA code, with its Fluid-Structure Interaction (FSI) analysis technique. The objectivity of this paper is to present three full-scale ship collision, grounding and flooding simulation results of marine accidents, and to show the possibility of the scientific investigation of marine accident causes using highly sophisticated M&S system.

• The Journal of Asian Finance, Economics and Business
• /
• 제9권1호
• /
• pp.311-324
• /
• 2022

The objective of this study is to examine the influence of fraud investigation on organizational performance of Thai listed companies through mediating effects of internal audit quality, accounting information transparency and financial effectiveness, and moderating effect of corporate governance. In this study, 333 Thai listed companies are the samples of the study. Both the structural equation model and multiple regression analysis are used to examine the research relationships. The results of this study show that fraud investigation has a significant influence on internal audit quality, accounting information transparency, and financial effectiveness. Internal audit quality significantly influences accounting information transparency, financial effectiveness, and organizational performance while financial effectiveness significantly influences organizational performance. Next, both internal audit quality and financial effectiveness potentially mediate the fraud investigation-organizational performance relationships. In addition, corporate governance critically moderates the fraud investigation-internal audit quality relationships and the fraud investigation-financial effectiveness relationships. In summary, fraud investigation functions as an important valuable technique of internal audit practices. As a result, businesses must build and implement a systematic fraud investigation procedure to generate and improve beneficial outcomes in the short, medium, and long term.

• 항공우주시스템공학회지
• /
• 제7권4호
• /
• pp.27-35
• /
• 2013

Identifying the stability of rotor systems is prerequisite for clear determination of the parameter identification and safety, through which operating conditions may be rationally ascertained. For this purpose, the complex modal analysis of periodically time-varying system has been introduced by transforming the relation between periodic eigen-vectors and the corresponding adjoint vectors into the latent value problem. Stability investigation associated with modal features for rotor systems is performed using numerical simulation based upon the analysis model.