EMAT를 이용한 냉연강판의 소성이방성 측정

황의찬,장경영,안봉영,이승석,김수광,김상영 한국정밀공학회 1995 한국정밀공학회 학술발표대회 논문집 Vol.1995 No.11월

AHP를 이용한 인천항 물류보안 평가에 관한 연구 -컨테이너 터미널을 중심으로-

황의찬,민정웅 한국해양수산개발원 2009 해양정책연구 Vol.24 No.11

To improve the efficiency of logistics and ensure safe freight flow, a comprehensive set of supply chain security initiatives have been implemented and practiced throughout the world. Since such initiatives might become a trade barrier in the future, it is necessary to respond and correspond to the logistics security in a timely manner. However, research in this area is still lacking, especially quantitative research or surveys on local port facilities and ships. In this context, this study included the logistics companies (maritime shipping companies, container terminals) in Incheon Port as well as many logistics security experts in Korea in order to assess the security level of Incheon Port. Using AHP, this research derived the security items with respect to the importance level and their priorities. The research result showed that each group posed different perception in terms of the importance level of security items. Overall, Incheon Port facilities were fairly managed for security but it needs considerable preparation for the item such as ‘cargo inspection and tracing,’ and ‘crisis management and disaster recovery & self assessment’ for further security enhancement. The weighted priority value was calculated by multiplying the importance value of the specific items and the evaluation value of the preparation level. Based on this result, this paper suggests that the item ‘cargo inspection and tracing’ and ‘security training/program’ need to get prepared further for responding global supply chain security requirements.

The Effectiveness of the Integrated Health Promotion Program for the Elderly

황의찬,조한라,여영훈 사단법인 미래융합기술연구학회 2021 아시아태평양융합연구교류논문지 Vol.7 No.2

As the elderly population has been rapidly increasing, interest in health in senescence has been amplified, and diverse health programs for the elderly have been implemented. The integrated health promotion program for the elderly attempted to overcome the limitations of the existing fragmented and scattered health programs for the elderly. First, a health promotion program incorporating the three topics of dementia, depression, and fall risk was planned, and a one-on-one customized program was implemented by visiting elderly households for multilateral aspects of physical and mental health. Second, a standardized manual was prepared, and the generalization of the manual is being attempted with 2,900 elderly persons who use 34 welfare facilities for the elderly in Jeollabuk-do. The purpose of this study is to examine the effectiveness of the visiting type integrated health promotion program. Changes in dementia, suicidal ideation, cognitive ability, fall risk, and ambulatory function ability were examined using the pre-and post-paired t-tests with 278 elderly persons in six institutions. Based on the results, positive effects of the program appeared in all areas except for the risk of falls. The results of single regression analyses, in which the amounts of changes in five health elements were used as dependent variables, showed that gender and age were not significant, indicating that the effects of the program were universal regardless of gender or age. The study results supported the effectiveness and important role of the integrated health promotion program for the elderly by verifying health improvement among the program participants.

납세자의 정서가 정부의 조세정책 결정에 미치는 영향

황의찬,우석진 한국법경제학회 2022 법경제학연구 Vol.19 No.1

In this paper, the effect of taxpayer tax resistance on the tax policy-making process was analyzed. Specifically, in order to measure the tax sentiment for tax policy, a tax sentiment dictionary was established using a textmining technique and a tax sentiment index was developed. A total of 12 tax policies with a significant level of Naver comment were selected and used as tax resistance episodes among the tax law amendments, the Ministry of Public Administration and Security, and emotional scores were established by collecting comments on credit card income deduction reduction policies in 2019. In order to calculate the tax sentiment index, Naver’s comments for each policy were text-minimized in units of words, and then the tax policy ontology established was signed. In this paper, logistic regression analysis was conducted as an example to confirm the correlation between the government's tax policy decision and tax sentiment. As a result of the analysis, it was found that the negative emotions of taxpayers are likely to withdraw government policies. Specifically, if the tax sentiment index is lowered by one unit, the likelihood of the government withdrawing the policy increases by about 1.5%, and when the tax sentiment index –69.87 is set as a threshold, the classification accuracy of the model is observed to increase to 75%. 본 논문에서는 납세자의 조세저항이 조세정책 결정 과정에 주는 영향을 분석하였다. 구체적으로 조세정책에 대한 조세감정을 측정하기 위해 텍스트마이닝 기법을 활용하여 조세 감성사전을 구축하고 조세감정지수를 개발하였다. 기획재정부 세법개정안, 행정안전부 세법 개정안, 지방세제개편안 중 유의미한 수준의 네이버 댓글 수준을 가진 조세정책을 총 12건 선정하여 조세저항 에피소드로 사용하였으며, 조세 감성사전을 제작하기 위해 2019년 신용 카드 소득공제 축소정책 관련 댓글을 수집하고 형태소를 분석하여 추출한 감정단어에 감성 점수를 부여하는 방식으로 조세정책 온톨로지를 구축하였다. 조세감정지수를 산출하기 위해 각 정책에 대한 네이버 댓글을 어절 단위로 텍스트마이닝한 이후 구축한 조세정책 온톨로 지를 조인하였다. 본 논문에서는 정부의 조세정책 결정과 조세감정의 상관관계를 확인하기 위한 예시로 로지스틱 회귀분석을 진행하였다. 분석 결과 납세자의 부정적 정서는 정부 정 책을 철회시킬 가능성이 있는 것으로 나타났다. 구체적으로 조세감정 지수가 1단위 낮아지 면 정부가 정책을 철회할 가능성은 약 1.5% 증가하는 것으로 분석되었고 조세감정지수 -69.87을 임계치로 설정할 때 모델의 분류 정확도는 75%로 가장 커지는 것으로 관측되었다.

폭력 피해 경험이 있는 초등 교사의 대인관계 문제와 교사 소진의 관계에서 자기 자비의 매개 효과

황의찬(Hwang Eui Chan),김지혜(Kim Ji hye),유지연(You Jee Youn),송남옥(Song Nam Ok),신효정(Shin Hyo Jung) 학습자중심교과교육학회 2020 학습자중심교과교육연구 Vol.20 No.5

본 연구는 폭력 피해 경험이 있는 초등 교사를 대상으로 교사의 대인관계 문제가 자기 자비를 매개로 교사 소진에 미치는 영향을 검증하였다. 이를 위해 서울ㆍ경기도에서 근무하고 있는 초등 교사 333명(남자 78명, 여자 255명)을 대상으로, 폭력 피해 경험, 대인관계 문제, 자기 자비, 교사 소진 척도로 설문을 실시하였고, 폭력 피해 경험이 있다고 응답한 대상자의 자료, 237부를 분석하였다. 연구 결과는 첫째, 초등 교사가 인식한 폭력 피해 경험 실태의 빈도 분석에서 학생에 의한 폭력 피해경험이 학부모보다 높은 빈도를 나타냈다. 둘째, 폭력 피해 경험 유, 무에 따른 소진의 하위 유형별 평균 차이 검증에서 정서적 탈진, 성취감 상실은 유의미한 차이가 있었고 비인간화는 유의미한 차이가 없었다. 셋째, 폭력 피해 유경험자들의 대인관계 문제와 교사 소진의 관계에서 자기 자비의 매개효과는 부분 매개 효과가 있는 것으로 나타났다. 이러한 결과는 폭력 피해 경험이 있는 교사의 대인관계 문제는 교사 소진에 영향을 주는데 이 때 자기 자비에 초점을 둔 개입이 교사 소진을 낮추는데 효과적일 수 있음을 시사한다. 마지막으로 본 연구의 기여도, 후속 연구를 위한 제언, 그리고 교사 소진을 예방하기 위한 상담 프로그램을 논의하였다. This study investigated the mediating effects of self-compassion on relationship between interpersonal problem and burnout among teachers who experience violence victimization. A total of 333 elementary school teachers (78 males and 255 females) in Seoul and Kyunggi provinces participated in the survey. Each participant filled out a interpersonal problems, self-compassion scale, Maslach Burnout Inventoty- educator survey. 237 teachers who experience violence victimization of total 333 were analyzed. The results of this study are as follows: First, the frequency analysis of teachers who experience violence victimization was presented. Second, emotional exhaustion and reduced accomplishment of teacher burnout were significant differences comparing teachers who experience violence victimization to teachers who inexperience violence victimization. Third, self-compassion mediated partially the relationship between interpersonal problem and burnout. This result suggests that the personal intervention of self-compassion can be effective in decreasing teacher burnout. Finally, implications of teacher burnout, directions for future research and counseling programs to prevent teacher burnout are discussed.

미래 모빌리티 기술리딩을 위한 제동 시스템

황의찬(Euichan Hwang),황우현(Woohyun Hwang),정완교(Wankyo Jung),하병우(Byoungwoo Ha) 한국자동차공학회 2023 오토저널 Vol.45 No.8

배터리 패키징 구조 최적화

황의찬(Eui-chan Hwang),이재준(Jae-jun Lee),한성식(Seong-Sik Han),김흥규(Heung-Kyu Kim),장시열(Siyoul Jang) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11

평야지역과 산간지역 정호수 수질에 미치는 요인에 관한 조사

황의찬,이동배 忠南大學校 環境問題硏究所 1992 環境硏究 Vol.10 No.-

To find out the affecting factors of water quality of wells in the plain and mountainous area. I carried out the water quality test of 36 wells from plain area and 35 wells from mountainous area. The water quality test had done monthly for 5 months from November 1, 1991 to March 31, 1992. The results were concluded as follows: 1. The disqualified rate of wells in plain area was 15.6%, and the rate was 25.7% in mountainous area. There was no statistical differences of disqualified rates by types of well in both areas. 2. For the chemical water quality test, disqualified rate was higher in plain area, but for the bacteriological test, disqualified rate was higher in mountainous area. 3. There was no statistical significant differences of disqualified rates by the depth and structure of wells. 4. There was no statistically significant differences of disqualified rates among the wells by the sorts of contamination sources and distance from contamination sources. 5. In both area, the disqualified rates of wells tested during Autumn was highest but that was lowest during Winter. 6. In both area, there were positive correlations between NH₃-N and coliform group, NO₃-N and Cl-, NO₃-N and hardness, Cl- and hardness(p<0.001). 7. In plain area, there showed positive correlations between the distance of privy and sewer and standard plate count(p<0.01), but in mountainous area, there were positive correlations between the depth of wells and NO₃-N and Cl-, distance of barnㆍcompost and hardness, and coliform group, the distance from fieldㆍroad and hardness(p<0.01).

AHP를 이용한 인천항 물류보안 평가에 관한 연구 : 컨테이너 터미널을 중심으로

황의찬(Hwang Eui-chan),민정웅(Min Jung-ung) 한국해양수산개발원 2009 해양정책연구 Vol.24 No.1

To improve the efficiency of logistics and ensure safe freight flow, a comprehensive set of supply chain security initiatives have been implemented and practiced throughout the world. Since such initiatives might become a trade barrier in the future, it is necessary to respond and correspond to the logistics security in a timely manner. However, research in this area is still lacking, especially quantitative research or surveys on local port facilities and ships. In this context, this study included the logistics companies (maritime shipping companies, container terminals) in Incheon Port as well as many logistics security experts in Korea in order to assess the security level of Incheon Port. Using AHP, this research derived the security items with respect to the importance level and their priorities. The research result showed that each group posed different perception in terms of the importance level of security items. Overall, Incheon Port facilities were fairly managed for security but it needs considerable preparation for the item such as 'cargo inspection and tracing,' and 'crisis management and disaster recovery & self assessment' for further security enhancement. The weighted priority value was calculated by multiplying the importance value of the specific items and the evaluation value of the preparation level. Based on this result, this paper suggests that the item 'cargo inspection and tracing' and 'security training/program' need to get prepared further for responding global supply chain security requirements.

고도에 따른 엔진 출력 변화를 고려한 TCS 성능 최적화

황의찬(Euichan Hwang),강민구(Mingu Kang),육상덕(Sangduck Youk),명재상(Jaesang Myung) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11

In order to reduce vehicle accidents, ESC is installed in many contries as a standard. Among ESC, TCS is to request the engine torque increase when the driver press the accelerator pedal while driving. Generally, the speed increase of the vehicle can be predicted by the degree of the force applied to the accelerator pedal. However, the torque does not increase as much as the intention of the driver due to the low friction, gravel road, driving on road which friction ratio ratio are smaller than grips, and many other reasons. In this paper, the engine torque degradation due to the difference of oxygen partial pressure according to the altitude of the internal combustion engine has studied. In addition optimization model has applied to TCS control to maintain aceeleration and compensate the engine torque.