AHP를 이용한 건축건설공사 공종별 위험도 분석

김정민,이종빈,장성록,Kim, Jeongmin,Lee, Jong-Bin,Chang, Seong Rok 한국안전학회 2017 한국안전학회지 Vol.32 No.5

The highest fatal accident ratio was recorded in the construction industry. According to the industrial insurance premium rate & business type example, among the construction industry, the architectural work has the highest fatal and loss time accident ratio. Previous literature has investigated various aspects of accident occurrence and prevention in architectural work. However, those studied were limited in that they only focused on the fatal accident without considering the loss time accident. But non fatal accidents were recorded more than 50 times of fatal accidents. Therefore non fatal accidents must be controlled to lessen industrial accidents. Based on this, the goal of this study was to investigate the nature of the loss time accident and derive the risk index of work type in architectural work. In this study, opinions of safety experts were gathered and the risk index of work type was derived using AHP(Analytic Hierarchy Process). And verification was accomplished by comparing the results of this study with the risk index derived by analysis of accident records. Results showed that the risk index of work type was significantly higher in steel frame work, temporary installation work, earth & foundation work, facilities work, concrete work. And statistical analysis for verification showed that coefficient of Pearson correlation was 0.686 and P-value was 0.001.

건축건설공사의 공종별 위험도와 직무스트레스의 상관관계

김정민,이종빈,장성록,Kim, Jeongmin,Lee, Jong-Bin,Chang, Seong Rok 한국안전학회 2017 한국안전학회지 Vol.32 No.4

In this study, the risk level of architectural works was calculated by applying work period and number of input workers based on accidents records from 2012 to 2014 and the architectural works were divided into four groups(High-High, High-Low, Low-High, Low-Low) according to risk levels of fatal accidents and loss time accidents. And then questionnaire on the job stress level of workers was performed for 670 workers working in the architectural work using Korean Occupational Stress Questionnaire Form developed by KOSHA. And then the relationship between the risk level and job stress level of four groups was analyzed. Results showed that 1) risk levels of fatal and loss time accidents applied by work period and input workers were analyzed to be different with those of previous research based on the number of fatal and loss time accidents; 2) job stress level of workers has been analyzed to have a significant relationship with the risk level of fatal and loss time accident; 3) specially, the average of job stress level of 'HH(High-High)' group was higher than those of other groups; 4) among the subfactors of job stress, interpersonal conflict, job insecurity, organizational system and lack of reward were analyzed to be key factors to affect the risk level.

이벤트 기반 비디오 디블러링을 위한 딥러닝 모델

김정민(Jeongmin Kim),정용주(Yong Ju Jung) 한국정보과학회 2022 한국정보과학회 학술발표논문집 Vol.2022 No.06

동력분기방식 하이브리드 시스템의 구동 및 제동시 동력 특성 분석

김정민(Jeongmin Kim),김용하(Yongha Kim),강재영(Jaeyoung Kang),김성민(Sungmin Kim),김현수(Hyunsoo Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4

In this paper, power characteristics of the power split HEV for the input split, output split and compound split configurations are investigated. Using the lever analysis, state equations of each power split configuration is obtained and power characteristics such as torque and speed of two motor-generator(MG1, MG2) are obtained. It is found from the simulation results that the input split configuration can carry out electric vehicle mode and regenerative braking mode by the simple motor control, which is connected to the output shaft. The compound split configuration shows some advantages such as relatively smaller electric machine power during hybrid electric vehicle mode, which provides the reduced cost of the electric machines. From the power characteristics and transmission efficiency of each configuration depends on the speed ratio, proper combination of power split configuration considering the operating speed can provide the improved system efficiency with reduced electric machine cost. It is expected that the power characteristics of each power split configuration can be used in development of the power split HEV transmission system.

칸트 철학에서 신 존재 증명

김정민(Jeongmin Kim) 전남대학교 종교문화연구소 2021 종교문화학보 Vol.18 No.2

이 논문의 목적은 칸트의 이론철학에서 신 존재 증명을 정립하고 인간의 도덕적 삶의 근간이 신에 대한 신앙과 희망임을 밝히는 데 있다. 칸트가 형이상학을 학문으로서 재정립하는 과정에서 나타나는 신 존재 증명의 문제는 무엇인가? 특히 전통적 신 존재 증명을 거부한 칸트 주장의 근거는 무엇인가? 이 논문은 칸트가 전통 형이상학과는 다르게 제시하고자 하는 신 존재 증명과 그 근거, 전통 형이상학자들의 주장에 대한 태도를 검토하고, 그리고 결론에서 그 유용성을 규명할 것이다. 이를 위해 『순수이성비판』을 텍스트로 삼고 칸트 비판서 이전의 『신의 현존을 입증하기 위한 유일하게 가능한 증명 근거』 등의 자료들을 참고하여 신 존재 증명의 문제를 구명할 것이다. 칸트는 신 존재 문제의 토대를 마련하면서 『순수이성비판』 [B판] 서론에서 「철학은 모든 선험적(a priori) 인식의 가능성과 원리들과 범위를 규정해 주는 학문을 필요로 한다.」는 주제로 우리의 어떤 인식들은 모든 가능한 경험(Erfahrung)의 영역을 벗어나서, 경험 중에서는 그에 상응하는 대상이 주어질 수 없는 개념들에 의거해 우리의 판단의 범위를 경험의 모든 한계를 넘어 초월적(transzendental)세계까지 확장하려는 모습을 가지고 있다는 점에 대해 설명하고 그 대안의 필요성을 강조 제기한다. 따라서 우리는 칸트의 이론철학에서 신 존재 증명이라는 주제 아래 ‘신의 실재성(die Realität Gottes)’ 증명 여부를 탐구할 수 있겠다. 칸트에 의하면 신 존재 증명 여부는 불가능하다. 왜냐하면, 형이상학의 대상들은 감성세계의 현상학적 대상들처럼 지성개념의 원리와 방식에 따라 인식할 수 있도록 증명이 가능하지 않기 때문이다. 초월세계의 형이상학적 대상들은 사고할 수는 있으나 경험적으로 증명 여부는 불가능하다는 것이 ‘칸트의 신관’이다. 칸트의 논의에 따라 먼저 추론 가능한 형이상학적 대상인 신의 현존에 대한 유일한 증명 근거를 검토하고, 신 존재 증명에 대한 논증을 정리한 후, 신의 존재를 존재론적, 우주론적, 물리 신학적으로 증명하려는 사변적 시도들의 불가능성을 검토하고 칸트의 입장에서 비판한다. 결국 형이상학적 대상인 신 존재는 이념(Idee)적 가상(Schein)일뿐이어서 증명의 대상이 아니라, 신앙(Glaube)과 희망(Hoffnung)의 대상이라는 사실을 규명함으로써 인간의 도덕적 삶의 근간을 규명할 것이다. The purpose of this paper is to establish a proof of divine existence in Kant's theoretical philosophy and to reveal that the basis of human moral life is faith and hope in God. What is the problem of proving the existence of God in Kant's process of re-establishing metaphysics as a discipline? In particular, what is the basis for Kant's argument that rejected the traditional proof of existence of God? This paper will examine Kant's Proof of God's existence, its basis, and attitudes toward the arguments of traditional metaphysics, and clarify its usefulness in conclusions. To this end, the problem of proving God's existence will be investigated by using Pure Reason Criticism as a text and referring to data such as “the only possible basis for proving the existence of God's before Kant's criticism. Kant laid the foundation for the problem of God's existence and under the theme of “Philosophy requires learning that defines the possibility, principles and scope of all a priori perceptions,” some of our perceptions go beyond the limits of all possible experiences, based on concepts that cannot be given corresponding to them. Therefore, we can explore whether or not to prove 'The reality of God's under the theme of proof of God's existence in Kant's theoretical philosophy. According to Kant, it is impossible to prove the existence of God. This is because metaphysics objects cannot be proved so that they can be recognized according to the principles and methods of intellectual concepts like phenomenological objects in the emotional world. Kant's God's belief is that metaphysical objects in the transcendental world can be thought about, but empirically it is impossible to prove. Based on Kant's discussion, we first review the sole basis for proof of God's existence of God, a metaphysical object that can be inferred, organize arguments for proof of divine existence, then review the impossibility of speculative attempts to prove God's existence ontologically, cosmologically, and physically. In the end, we will clarify the basis of human moral life by finding out that the metaphysical object of God is not only an ideological virtual and is not an object of proof, but an object of faith and hope.

파장 코딩된 실시간 슬릿 공초점 현미경의 설계

김정민(Jeongmin Kim),강동균(DongKyun Kang),권대갑(DaeGab Gweon) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월

New real-time confocal microscopy using spectral encoding technique and slit confocal aperture is proposed and designed. Spectral encoding technique, which encodes one-dimensional spatial information of a specimen in wavelength, and slit aperture make it possible to obtain two-dimensional lateral image of the specimen simultaneously at standard video rates without expensive scanning units such as polygon mirrors and galvano mirrors. The working principle and the configuration of the system are explained. The variation in axial responses for the simplified model of the system with normalized slit width is numerically analyzed based on the wave optics theory. Slit width that directly affects the depth discrimination of the system is determined by a compromise between axial resolution and signal intensity from the simulation result. On the assumption of the lateral sampling resolution of 50 ㎚, design variables and governing equations of the system are derived. The system is designed to have the mapping error less than the half pixel size, to be diffraction-limited and to have the maximum illumination efficiency. The designed system has the FOV of 12.8 um×9.6 um, the theoretical axial FWHM of 1.1 um and the lateral magnification of -367.8.

전곡 지역 제4기 현무암질 암석의 <SUP>40</SUP>Ar-<SUP>39</SUP>Ar 연대 측정

김정민(Jeongmin Kim),최정헌(Jeong-Heon Choi),전수인(Su In Jeon),박울재(Ul Jae Park),남성수(Seong Soo Nam) 한국암석학회 2014 암석학회지 Vol.23 No.4

한반도 중부 전곡 지역 한탄강 유역에는 제4기 시기에 분출한 현무암질 암석들이 화산대지 및 하식절벽으로서 분포한다. 국내 최초로 도입된 다검출기 불활성기체 질량분석기와 레이저 가열장치를 이용하여 전곡 지역에서 산출하는 현무암질 암석의 <SUP>40</SUP>Ar-<SUP>39</SUP>Ar 연대를 측정하였다. 전곡읍 은대리 지역 하식절벽의 현무암들은 하부에서 상부로 가면서 0.54±0.07 Ma, 0.48±0.01 Ma, 0.12±0.01 Ma의 연대를 나타내며 전곡리 지역의 현무암에서 0.43±0.04 Ma의 연대가 얻어진다. 이 결과는 0.12-0.54 Ma 사이에 전곡 지역에 단속적인 화산암의 분출이 있었을 가능성을 시사한다. Quaternary basaltic rocks occur as volcanic plateau and/or river cliff in the watershed area of Hantan River in Jeongok, central Korea. We measured <SUP>40</SUP>Ar-<SUP>39</SUP>Ar ages for the basaltic rocks from Jeongok area using the multi-collector noble gas mass spectrometer and laser heating device introduced for the first time in Korea. The basaltic rocks from the river cliff in Eundae-ri area show the systematic change in <SUP>40</SUP>Ar-<SUP>39</SUP>Ar ages from 0.54±0.07 Ma through 0.48±0.01 Ma to 0.12±0.01 Ma toward the top. The other sample from Jeongok-ri area yields the age of 0.43±0.04 Ma. This results suggest that there might be a episodic volcanic eruption between 0.12-0.54 Ma in Jeongok area.

Petrogenesis of the Precambrian Hongjesa granite

Jeongmin Kim(김정민),Moonsup Cho(조문섭) 한국암석학회 1994 암석학회지 Vol.3 No.1

자동화 컨테이너 터미널의 복수 규칙 기반 AGV 배차전략 최적화

김정민(Jeongmin Kim),최이(Ri Choe),박태진(Taejin Park),류광렬(Kwang Ryul Ryu) 한국항해항만학회 2011 한국항해항만학회지 Vol.35 No.6

본 논문은 컨테이너 운송을 위한 AGV(Automated Guided Vehicle) 배차 전략을 대상으로 한다. AGV 배차 문제는 안벽 크레인의 대기 시간과 AGV의 주행 거리를 최소화하도록 AGV에 작업을 할당하는 것이 목표이다. 터미널 환경의 동적인 특성으로 인해 계획 결과의 정확한 예측이 어렵고 수정이 빈번하기 때문에 실무에서는 의사결정 시간이 짧은 단순 규칙 기반 배차가 많이 쓰인다. 그러나 단순 규칙 기반배차는 근시안적 특성으로 인해 배차의 다양한 성능 지표를 만족시키지 못하는 한계가 있으며 이를 극복하기 위해 본 논문에서는 복수 규칙기반의 배차 전략을 제안한다. 복수 휴리스틱 기반 배차 전략은 여러 규칙의 가중합으로 구성되며 규칙 사이의 가중치를 최적화하기 위해 다목적 진화 알고리즘을 적용하였다. 시뮬레이션 실험을 통해 제안 방안이 기존 단일 규칙 기반 배차에 비해 더 좋은 성능을 보임을 확인하였다. This paper focuses on dispatching strategy for AGVs(Automated Guided Vehicle). The goal of AGV dispatching is assigning AGVs to requested job to minimizing the delay of QCs and the travel distance of AGVs. Due to the high dynamic nature of container terminal environment, the effect of dispatching is hard to predict thus it leads to frequent modification of dispatching decisions. In this situation, approaches based on a single rule are widely used due to its simplicity and small computational cost. However, these approaches have a limitation that cannot guarantee a satisfactory performance for the various performance measures. In this paper, dispatching strategy based on multicriteria heuristics is proposed. The Proposed strategy consists of multiple decision criteria. A multi-objective evolutionary algorithm is applied to optimize weights of those criteria. The result of simulation experiment shows that the proposed approach outperforms single rule-based dispatching approaches.

초음파센서를 기반으로한 통학차량 내 남겨진 아이 감지에 관한 연구

김정민(Jeongmin Kim),김정재(Jeongjae Kim),문태은(Taeeun Mun),박훈민(Hunmin Park) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11