시뮬레이션을 이용한 전시 간부 동원자원의 수급 분석

정철우 한국경영과학회 2015 한국경영과학회 학술대회논문집 Vol.2015 No.4

상수처리시 유기물 제거에 접합한 무기성 고분자응집제 제조시 황산이온의 영향

정철우,한승우,황보봉형,강임석 대한환경공학회 1998 대한환경공학회 학술발표논문집 Vol.1998 No.12

이제는 건설재료의 미래를 대비할 때

정철우 한국건축시공학회 2020 건축시공 Vol.20 No.2

음주운전 교통사고의 특성과 음주운전자의 준법성향에 관한 연구

정철우 경찰대학교 2007 경찰학연구 Vol.7 No.2

This study examined two main themes, the characteristics of drunken driving accident and the impact of law-abiding propensity of drunken drives on drunken driving accident, by using binominal logistic regression model. The characteristics of drunken driving accident are as follows: 1. The damage caused by drunken driving accident is larger in beginner group than in the experienced group. The largest damage was found in the group of drivers with 5~10 years of driving experience. 2. The degree of injured damage appeared to be dependent on the degree of alcohol rate. Severe damage was found in two group: low alcohol rate group and high alcohol rate group. Interestingly, the middle alcohol rate group tended to experience less severe damage than the other two groups. It appeared that the low alcohol rate drive a bold driving because they feel safe or have confident out of little drinking. On the other hand, the high alcohol rate group tended to lose attentiveness remarkably. 3. Regarding the correlation between law-violation experiences and degree of alcohol rate, more traffic accident experiences and more alcohol rate were associated with lower alcohol rate. Fear of enforcement and/or high probability of accident seemed to lead to less alcohol consumption before driving. The logistic regression model discovered an interesting finding. Only one indicator of the law-abiding propensity, accident experience, was statistically significant after controlling for the other two indicators, variables-insurance, law-violation experience. Overall, it appeared that law-abiding propensity reduces the chance of traffic accident. This study shows that the group of low law-abiding propensity have higher probability to the traffic accident than that of high law-abiding propensity. According to the result, we can derive the countermeasure to the drunken driving accident 1. It is necessary to manage the driving license rigorously to the beginning driver group through education and observation, for example, beginning driver observation system in German and Japan. 2. It requires to drop the drunken driving enforcement threshold from 0.05% to 0.03% or 0.00% because even drunken driving in low alcohol rate in blood can cause injured damages more severely. 3. It is necessary to make it a rule all driver should have insurance from the step of their purchasing cars, and all insurance system to be uniform one, comprehensive insurance. The result may used to develop the education program for the drivers causing accidents, to decide the criterion of premium insurance rates and to planning law enforcement agencies activities. The other factors affect to the drunken driving accident and how they impact maybe considered in the future researches.

The Use of Semi-Adiabatic Calorimetry for Hydration Studies of Cement Paste

정철우,김지현,이수용 한국건축시공학회 2016 한국건축시공학회지 Vol.16 No.2

The semi-adiabatic calorimetry technique is a robust and easy technique that can be used to measure thetemperature rise of concrete. This method is often used for investigating the maturity of concrete, as well as to predictmaximum temperature rise of mass concrete using various heat loss compensating models. Semi-adiabatic calorimetrycan also be used for predicting setting time of concrete. However, it has seldom been used to investigate the hydrationcharacteristics of various cement paste samples. In this research, semi-adiabatic calorimetry and X-ray diffractionmethods were used to investigate the hydration characteristics of 3 different ASTM type I Portland cements. Firstderivative of temperature rise (dT/dt) curve was used to isolate individual peaks. Based on the results of theexperiments, a combination of dT/dt curve with XRD could be used to successfully identify hydration at a specifictime period, showing its potential to be used as an alternative tool for hydration studies of cement-based materials.

인질 테러 작전 성공 영향요인 분석

정철우 경찰대학 공공안전학연구원 2022 공공안전학연구 Vol.2 No.2

본 연구는 인질 테러가 발생하였을 경우, 인질을 안전하게 구조하고 인질범을 검거하여 테러 상황이 원만히 해결될 수 있는 요인이 무엇인지를 과학적으로 밝히기 위할 목적으로 수행되었다. 실제로 발생한 인질 테러 사건을 대상으로, 사건의 성공/실패에 대한 공통적인 요인을 추출하여 이를 분석하였다. 분석결과, ‘정보수집’, ‘전문가 개입’, ‘라포 형성’, ‘긴 작전시간’은 인질 테러 상황을 성공적으로 종결시키는 데에 있어 긍정적인 영향을 미치고 있었다. ‘특수부대 투입’, ‘제3 중재인 개입’은 유의한 영향을 미치지 못하는 것으로 나타났다. 이러한 연구결과는 기존의 연구에서 개별적 사건에 대한 성공/실패 요인에 대하여 과학적 검정이 이루어진 것이므로, 향후 인질 테러 진압 작전의 계획수립이나 실행에 있어서 중요하게 고려할 사항이라고 할 수 있다. 또한, 협상가 양성 교육의 프로그램에 있어서 이러한 요인을 중점적으로 강조하여야 할 사항이라고도 할 수 있을 것이다. 한편 영향력의 크기를 보면 ‘협상 전문가의 투입’이 가장 큰 영향을 미치고 있으므로, 이들의 양성을 위한 교육에 보다 많은 투자가 있어야 할 것으로 보인다. 또한, 전문가뿐만 아니라 테러 관련 국가기관이나 종사자들의 테러 정보 수집 능력이 제고될 수 있어야 할 것이다. The purpose of this study was to scientifically clarify the factors that can smoothly resolve the terror situation by safely rescuing the hostage and arresting the hostage in the event of a hostage attack. Common factors for the success/failure of the incident were extracted and analyzed for the actual hostage terrorist incident. As a result of the analysis, "information collection," "expert intervention," "labo formation," and "long operation time" were having a positive impact on successfully ending the hostage terrorist situation. It was found that 'implementation of special forces' and 'intervention of third intervention' did not have a significant effect. These findings can be said to be an important consideration in planning or implementing future hostage terrorist suppression operations, as scientific tests have been conducted on the success/failure factors of individual events in previous studies. In addition, it can be said that these factors should be emphasized in the program of training negotiators. On the other hand, looking at the magnitude of their influence, "the input of negotiation experts" has the greatest impact, so it seems that there should be more investment in education to foster them. In addition, not only experts but also state agencies and workers related to terrorism should be able to improve their ability to collect terrorist information.

국내 패각류 재활용 방안에 대한 고찰 - 굴 패각을 중심으로

정철우,Chung, Chul-Woo 한국건설순환자원학회 2016 한국건설순환자원학회지 Vol.11 No.1

측색기를 활용한 건설안전표지의 측색과 평가

정철우,이재용 한국건축시공학회 2019 한국건축시공학회지 Vol.19 No.3

Safety sign panel has been used in construction sites to assure the safety of the workers. Such safety panel can be categorized as 4 different signals, such as prohibition, warning, indication, and information. Each of the categorized item must follow lawful which is specifically designated for its own purposes, on its color and the shape. However, the color and shape of the safety sign panels that have been used in construction sites are not found to follow the suggested lawful requirement, and such differences are originated from safety merchandise production company or vendor, and construction company. In this study, samples of safety sign panels were obtained from various construction sites in Republic of Korea then the colors of such samples were measured, analyzed, and compared. According to the results, colors of the safety sign panels were out of the lawful requirement due to the aging and surface contamination of the safety sign panel. Frequent maintenance on the safety sign panel is therefore necessary. In addition, steel panels that were used in the construction sites were found to be unsuitable to meet the lawful requirements. In order to the color requirements on safety sign panel, it is recommended for Korea Occupational Safety and Health Agency to provide standard reference sample for each material used to produce safety sign panel, to distribute them to the producer and construction sites, and to supervise overall system. 본 연구에서는 건설현장에 설치된 표지판을 측색하여 색 기준에 대한 적합성 검토와 현장여건에 적합한 관리 방안을 제시하고자 하였으며, 현장에 설치된 안전표지판은 관련기준에 적합한 정도가 적색 33%, 황색 22%, 청색 3%, 녹색 28%로 나타나 각각의 현장에 설치된 법적인 기준에 대부분 적합하지 않은 것으로 나타났으며, 청색 안전표지판에 대하여 보다 적극적인 제조생산과 관리에 대한 관련기관의 감독이 필요하다.

상수원수내 유기물제거에 적합한 응집공정과 UF 공정의 결합

정철우,김효진,류동춘,임중근,강임석 대한환경공학회 2001 대한환경공학회 학술발표논문집 Vol.2001 No.12

‘운전면허 특혜점수’ 제도 효과연구

정철우 한국경찰연구학회 2015 한국경찰연구 Vol.14 No.3

교통안전을 확보하기 위하여 기존의 정책은 법규를 위반한 운전자나 교통사고를 발생시킨 운전자에 대하여 단속이나 형벌부과, 운전면허 행정에 따른 운전면허 정지 나 취소, 또는 벌점부여, 보험료의 인상 등 규제적인 방법을 취해왔다. 하지만 이러 한 규제위주의 제재방법은 교통안전을 확보하는 데에 있어 효과의 한계성을 가지고 있다는 것이 여러 연구결과 밝혀지고 있다. 이러한 점에 착안하여 경찰청에서는 2013 년 8월 1일부터 무위반·무사고 서약을 한 후 1년 동안 법규위반이나 교통사고발생이 없는 운전자에 대하여 특혜점수를 부여하는 이른 바 ‘면허 특혜점수’정책을 시행하였 다. 모든 정책은 시행 후 그 효과를 측정하여야 한다. 효과측정을 바탕으로 정책시행 을 지속할 것인지의 여부를 판단할 수 있을 뿐만 아니라 정책의 오류를 개선할 수 있는 방안을 모색할 수 있기 때문이다. 본 연구는 본 정책에 응한 운전자와 그렇지 않은 운전자의 법규위반특성을 바탕으로 본 제도의 교통안전 효과를 분석하기 위한 목적으로 수행되었다. 연구결과, 본 제도에 응한 운전자는 그렇지 않은 운전자에 비 하여 안전운전에 대한 태도의 변화효과가 있는 것으로 나타났다. 또한 지속적인 정 보제공 교육은 본 제도 정착에 기여할 것으로 판단된다. The primary purpose of this study is to suggest new empirical material for traffic safety policies by analysing the effectiveness of ‘Privilege License Score’. Some earlier researches on these subject didn’t take the characteristics of offenders into consideration, so they analysed the only violation or accident themselves. But this study considered this factor, because the purpose of safety policies were changing the attitudes of drivers. For this study, data of 43,618 drivers in Seoul were collected. For matching the number of sample, every 30 drivers of not requested data were selected. To analyse the effectiveness of ‘Privilege License Score’, a multiple regression analysis method was conducted. The result of this study showed that ‘Privilege License Score’ policy is effective in changing the attitude of offenders. So this policy should be continued consistently, and should be improved through continuous information providing or education for that let the drivers change their driving attitude. This study had a major limitations. Above all, socioeconomic variables such as education level, marriage status, and economic condition were not controlled. Future study will be expected continued by overcome these weakness.