계면활성 (界面活性) 아미노싸이클리톨 유도체(誘導體)의 계면화학적 성질

이창섭,손주환 한국유화학회 1987 한국응용과학기술학회지 Vol.4 No.1

Plasma levels of liporoteins were observed in vegetarians and non-vegetarians in order to compare the values between the two groups with different dietary habits, and among different age groups. All 162 vegetarians and 95 non-vegetarians were selected for this study. In detail, male vegetarians subjects were devided into three groups according to their ages, 20's, 30's and 40's. And three control groups were also selected at matching basis. Two groups each were selected for female subjects in their 20's and 40's. All ten groups were adopted and the lipids levels were compared appropriately. Plasma pre-β-lioprotein levels of non-vegetarians were not significantly in all groups. And plama α-liporotein levels of non-vegetarians were higher than the ones for vegetarians as compared with male of 20's, male 30's female of 40's, and it was not significantly as compared with female of 20's. And plasma β-liporotein levels of vegetarians were significantly lower than the ones for non-vegetarians in all groups. Most of plasma liporotein levels measured were found to be lower in vegetarians and tended to be higher age proups of both vegetarians and non-vegetarians. Ans plasma α-lipoprotein levels which is known to be adversely related to atheroscherosis were higher in non-vegetarians, it can be concluded in this study that the plasma lipoprotein levels of non-vegetarians under Korean dietary patterns are quite acceptable.

수종의 유치 수복재료의 세포독성에 관한 실험적 연구

이창섭,박주철,임광호 朝鮮大學校 口腔生物學硏究所 1999 Oral Biology Research (Oral Biol Res) Vol.23 No.2

The purpose of this study was to compare the cytotoxicity of deciduous teeth restorative materials - dental amalgam, composite resin, glass-ionomer cement, and stainless-steel preformed crown - on fibroblasts cultivated form human child ginagiva. Cell numbers were counted and cell morphology was observed on the 2en, 4th, and 6thexperimental days. And viable cell count was performed to evaluation the short-term cytotoxicity. The obtained results were as follows. 1. In the cell morphology observation, viable cell nember of amalgam and composite resin group decreased and showed distropic shape on the 2nd and 4th dsys 2. Amalgam and composite resin group showed cytotoxicity compared to the control and preformed crown goup on the 2nd and 4th days, ranks ordered the relative cytotoxicity of the test materials, as follows ; amalgam, composite resin, G-I cement, S-S preformed crown, and control group 3. Amalgam and composite resin group more cytotoxicity than control goup on the 2nd and 4th days, but it was reduced and showd viable rate as 92.25%, 92.67% on the 6th days.

코로나19에 따른 국내 제약회사의 하방경직적 원가행태 변화

이창섭,우소희 한국콘텐츠학회 2023 한국콘텐츠학회논문지 Vol.23 No.1

본 연구는 2018년부터 2021년 국내 유가증권에 상장된 제약회사를 대상으로 코로나19가 판매관리비의 하방경직적 원가행태에 미치는 영향을 실증적으로 분석하였다. 원가의 하방경직성은 기업의 매출이 증가할 때의 원가 증가 수준보다 매출이 감소할 때의 원가 감소 수준이 낮은 것을 의미하며, 이는 경영자의 조정비용을 고려한 의사결정으로 발생한다. 코로나19 확산 이후 국내 제약회사의 경우, 한정된 자원을 신약 연구개발 및 코로나 관련 상품의 수입 등에 집중해야 하며, 매출의 장기적 감소가 예상되는 상황을 대면하였다. 본 연구에서는 이와 같은 상황에서 경영자는 판매관리비를 코로나 19 확산 이전보다 적극적으로 절감하는 효율적 의사결정을 수행하여 원가의 하방경직성이 완화될 것으로 예측하였다. 실증검증을 위해 Anderson et al.(2003)의 모형을 사용하였으며 실증분석 결과, 코로나 19 팬데믹 이후 판매관리비의 하방경직성이 코로나 19 이전에 비해 완화되었음이 관찰되었다. 본 연구결과는 코로나19가 경영자의 판매관리비에 관련된 의사결정에 유의한 영향을 줄 수 있음을 제시함으로써, 관련 실무자 및 학계에 기여할 수 있을 것으로 기대된다.

집단상담 및 스포츠 활동 프로그램이 여중생의 인성변화에 미치는 효과

이창섭,진영철 忠南大學校體育科學硏究所 2001 體育科學硏究誌 Vol.19 No.1

The purpose of this study was to investigate the effects of group counseling and sports program on the personality enhancement of girls' middle school students. Group counseling and sports program were executed with 24 girls' middle school students for 12 weeks(twice a week). The instrument for this study was the 'Personality Test for middle & high school students'. The statistical methods for the data analysis was paired t-test. From the analysis of this study, the obtained conclusions were as follows; 1. The programmed group counseling and sports activity(soccer) enhanced the emotional stability of deviants in the girls' middle school students. 2. The programmed group counseling and sports activity(soccer) enhanced the sociability of deviants in the girls' middle school students. 3. The programmed group counseling and sports activity(soccer) enhanced the reflectiveness of deviants in the girls' middle school students. 4. The programmed group counseling and sports activity(soccer) decreased the impulsiveness of deviants in the girls' middle school students. In summary, the results of this study showed that participation in the programmed group counseling and sports activity could enhance the certain factors of deviants' personality in the girls' middle school students.

체육교사의 지도행동 유형에 관한 선호도 분석

이창섭,김우년 忠南大學校體育科學硏究所 2002 體育科學硏究誌 Vol.20 No.1

The purpose of this study is to examine the Physical education teachers preferred type of teaching behavior. The population of this study was middle school students, physical education teachers, other teachers, and administration officials, such as principals and vice-principals, studying and serving in Taejeon megalopolis. Using random sampling, 674 subjects were asked to respond the survey. The survey had 22 questionnaires about physical education teachers teaching behavior. The survey divided teaching behavior into 5 types, which is Teaching & Instruction Behavior. democratic behavior, Social Support Behavior, and Positive Feedback Behavior. To analyze the data collected for this study factor analysis, t-test, paired t-test, and one-way ANOVA were used. Conclusions from the results of this study are as follows: First, the students preferred democratic behavior among the 5 types of behavior. Second was positive feedback, third was teaching & instruction, fourth was social support, and last was autocratic behavior. Second, the teachers and administration officials preferred positive feedback behavior among 5 types of behavior. Second was social support, third was teaching & instruction, fourth was democratic, and last was autocratic behavior. Third, students preferred behavior considering class satisfaction was democratic behavior. And teachers preferred behavior considering class accomplishment and result was positive feedback behavior. Fourth, administrator groups preference of teaching & instruction, positive feedback, and social support behavior were highest among 4 subject groups (physical education teacher, teacher, administrator, and student group). And students group preference of autocratic behavior and democratic behavior were the highest among 4 subject groups (physical education teacher, teacher, administrator, and student group).

제주도 한라산조면암의 풍화특성에 관한 연구

이창섭,조태진,이상배,원경식,Lee, Chang-Sup,Cho, Tae-Chin,Lee, Sang-Bae,Won, Kyung-Sik 대한지질공학회 2007 지질공학 Vol.17 No.2

한라산 정상부의 백록담 암체는 백록담조면현무암이 분포하는 동측구역과 한라산조면암이 분포하는 서측구역으로 구분된다. 백록담에서 진행되는 풍화, 암벽붕괴, 낙반은 전반적으로 백록담 서측구역에 분포하는 한라산 조면암의 풍화작용과 밀접한 연관성을 가지며, 동측구역에서는 개별 암석 블록들의 국지적 붕락현상이 발생한다. 본 연구에서는 한라산조 면암 분포지역의 지질학적 및 지형학적 특성을 조사하였으며, 풍화단계별로 조면암 시료를 채취하여 편광현미경분석, X-선 회절분석, 전자현미경관찰, 지화학분석, 공학적 물성시험 등을 수행하였다. 실험결과에 의거하여 한라산조면암의 광물 암석학적 특성변화, 화학적 특성변화와 물리적 특성변화를 분석하였으며, 백록담을 구성하는 조면암체의 풍화특성과 원인을 조사하여 풍화 메커니즘을 고찰하였다. Baeknokdam rock mass at the crest of Halla mountain is composed of Baeknokdam trachybasalt in the eastern region and Hallasan trachyte in the western region. On-going weathering, rockfall and collapse of Baeknokdam wall rock are closely linked to the weathering of trachyte distributed in the western region of Baeknokdam, though within the restricted area of eastern region trachybasalt blocks has been naturally formed and may be rolled down neering properties have been conducted. Based on the results of these experiments variations of mineralogical-petrographical characteristics of trachyte together with chemical and physical properties with respect to the degree of weathering have been analyzed. Weathering mechanism of Baeknokdam trachyte has been delineated by investigating the environmental cause of weathering and the peculiar features of weathered rock mass.

청소년의 정신장애에 대한 임상적 고찰

이창섭 大韓神經精神醫學會 1977 신경정신의학 Vol.16 No.2

In order to understand the psychopathology in adolescence, a cumulative psychiatric case register was utilized to examine patterns of psychopathology in 267 adolescent patients, who were seen at Department of Neuro-Psychiatry, Busan University Hospital, during past 3 years, from January 1973 to December 1975. In this study, particularly at issue are the following: (1) Number of adolescent patients compared with total psychiatric patients; and (2) The distribution of patterns of psychopathology among adolescents in relation to their age, sex, social class, and the treatment setting in which they are seen. The results obtained were as follows: 1) The adolescent psychiatric patients were 3.68% of the total psychiatric patients. 2) In sex difference, the male was two times more prevalent than the female in O.P.D cases(male : female=69.2% : 30.8%), but there was no remarkable difference in admitted cases(male : female=55.2%:44.8%). 3) Between the age of 16 and 18, 75.9% of total male patients and 66.3% of total female patients were occupied and total average mean was 72.7%. Only neurosis occurred frequently in female patients. 4) The diagnostic proportion was revealed in order as follow: Neurosis, schizophrenia, organic brain syndrome, transient situational disorder, mental retardation, psychosomatic disorder, and behavior disorder. The admission rate was increased by year.

射擊選手의 競爭不安要因 및 水準에 관한 硏究

金相斗,李昌燮 忠南大學校體育科學硏究所 1990 體育科學硏究誌 Vol.8 No.1

This study was performed to find out the effective psychological coaching points for peak performance in the shooting by analyzing the causes of anxiety of shooters. The test papers used here were developed by K. U. Kim in 1986 for korean. It was consisted of 100 questions in 10 factors. Eighty-nine shooting athletes over high school were served as subjects for the test. Test data was analyzed statistically thru one way ANOVA according to the subjects' age, shooting career(year), and their shooting ability. Following conclusions were obtained. 1. The cause of anxiety according to the age was significant in 5 factors (lack of confidence, unfamiliar facility and place, troubles with team members, anxiety about training, and complaints about the physical condition). The anxiety level in the under 20 years aged was the highest and got lowered in the 21-25 years aged and over 26 years aged shooters in that order. 2. The cause of anxiety according to the years of shooting career was significant in 7 factors out of 10. In the anxiety level, the level of the group whose career was under 4 years was the highest and got lowered in the 4-5 years career group and over 6 years career group in that order. 3. In the level of anxiety according to the shooting ability, average shooters' higher than excellent shooters'. And the main causes of anxiety were worry about the training before game, mental burden about the expectancy of supporter, fear about failure, and troubles with team members.

A Study of Employer-Supported Childcare and Women Employment

이창섭,허광복 단국대학교 미래산업연구소 2019 산업연구 Vol.43 No.2

Despite the high academic level of Korean women, the rate of female employment remains low among OECD countries. One of the main reasons for this low female employment rate is career interruption due to childcare. Thus, various measures are proposed to reduce the career interruption of female employees, and this study focused on the employer-supported childcare among these measures. We collect opinions from employers and employees through surveys about the employer-supported child care. In addition, the opinions on how to promote the employer-supported childcare program are investigated through expert interviews. From the survey results, we find that both employers and employees agree that the employer-supported childcare program would be helpful to maintain and create women employment. Also, we report the suggestions of expert interview that tax-benefit and joint program are the solutions for small-size and private companies to install the employer-supported childcare program. This study is expected to contribute to the labor market and academia by suggesting the importance of the employer-supported childcare program for activating the women employment.

지질조건을 고려한 한라산 남벽 우회탐방로 설계사례

이창섭,이병욱 대한지질공학회 2018 대한지질공학회 학술발표회논문집 Vol.2018 No.1