• 한국환경과학회지
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• 제32권5호
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• pp.285-301
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• 2023

This study analyzed characteristics of ozone (O₃) formation regimes in Busan over a period of recent five years (2015~2019) and compared the findings with those obtained in Seoul. We employed four observed variations: early morning commuting-hour (i.e., 06:00-09:00 LST) nitrogen dioxide (NO₂), peak-hour (i.e., 12:00-16:00 LST) O₃, 8-hour average O₃ (MDA8 O₃), and △O₃ (=O_{3_max}- O_{3_min}) in Busan and Seoul. In addition, the NO₂-O₃ relation was assessed to interpret which of NOx-limited or volatile organic compound (VOC)-limited was dominant. In Busan, the annual mean O₃ concentration was relatively higher than in Seoul, whereas there were fewer high-concentration days. The Pearson correlation coefficients (R) between Early morning-hour NO₂ and the Peak-hour O₃ was positive (but close to zero) in Busan and negative in Seoul. Likewise, the R between the Early morning-hour NO₂ and the △O₃ showed a relatively considerable positive correlation (R=+0.4~0.5)(R=+0.4~0.5) in Busan, while a weak positive correlation (R=+0.1~0.2) in Seoul. From this result, it can be inferred that the O₃ formation regime in Busan was intrepreted to be nearly neutral or relatively closer to the NO_x-limited regime than Seoul, while Seoul to the VOC-limited regime. The study findings imply that O₃ control strategies should be applied differently in Busan and Seoul. The results here were inferred from surface NO₂ and O₃ observations, and the varification studies based on in-situ VOCs measurements would be needed.

• 대한치과기공학회지
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• 제29권1호
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• pp.59-72
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• 2007

This study executed to offer the basis for dental technology student who chanced better clinical training. This investigation conducted on 267 of seniors who have been taken clinical training to self written a questionnaire. We used and dealt a spss 12.0 program. Study results below 1. In a question about relationship, one answered "Harmonious" took largest proportion by 40.9% during training, and about the degree of satisfaction of campus life who answered :normal: were the most with 50.0% 2. In a question about clinical training place, most(50.0%) choose place less than 10 for clinical training, and more than 10 for clinical training with 29.7%. Residue statues was most of them resided own home with 78.6%. About their commuting time from home to training place, 50.0% was under 30min, 34.1% took time 30$\sim$60min. 3. In a question about clinical trainer, most (34.4%) choose as dental lab president, as each part manager with 34.1%, a senior with 7.6% and not exist to clinical trainer with 7.6%. 4. A perfect score about teaching efficiency and satisfaction of clinical practice of dental technology students was 5. The average of score about satisfaction of clinical practice was 3.25 and circumstance of clinical training got 3.50 as a highest score. the lowest score was 2.87 that is about satisfaction of clinical training period. The average of score of teaching efficiency was 3.25. 'a Role model' got 3.55 as the highest score and 'utility for student' got 3.12 as the lowest 3.12. 5. The result of T-test to see of the satisfaction according to the general character and clinic training condition between teaching efficiency is that the degree of satisfaction of clinical training showed statistical significance only in the degree of satisfaction of college life(p<0.05), teaching efficiency has a statistical significance with age and satisfaction of college life(p<0.05). 6. The relation between of teaching efficiency of clinical training and satisfaction of clinical training of dental technologic student has a statistical relation r=0.551 and a statistical meaning in significance leveler 0.01.

• 대한치과기공학회지
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• 제28권1호
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• pp.121-142
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• 2006

Collecting materials for study on teaching efficiency and satisfaction of clinical training, it changes. Dental technology's educational procedure to many ways of a prospect. In a circumstance that needed higher level of education, this study is aimed on realizing an importance of clinical training through the various materials that previously carried out and offering basic knowledge to take better clinical training for the students. Study results below 1. This Investigation conducted on 123 of sophomores(70.3%) and 52 of juniors(29.7%) who have been taken clinical training, and men's proportion(51.45%)is a bit higher than girls(48.6%). The 64% of respondents taken largest proportion were 20 to 24 years old. As 67.9% of respondents attended daytime school and 30.3% of them attended nighttime one, their school time shows a little difference. In a question about relation ship, one answered "Harmonious" took largest proportion by 72.6% during training, and about the degree of satisfaction of campus life who answered "normal" were the most with 59.4%. 2. About the reason choosing dental technology as a major, 41.1% taken the most answered "due to the specialized job", "Getting job easily" was second with 26.9%, and third was "recommended from around" with 18.3%. 50.3% of the respondents answered "normal" about the Satisfaction of their major, student marked in grade "B" most with 51.4% 3. In a investigation result about clinical training statues and preference, most(72.6%) choose place less than 10 for clinical training, and 60.6% of them resided own home. About their commuting time from home to training place, 44% was under 30min, 40% took time 30-60min. It shows students prefer shotter distance in terms of choosing training place. 4. Each part manager took large proportion as a clinical trainer with 33.7%, Training curriculum reform and developing method were most answer as a improvement measure after completing training with 30%. 5. The average of total score about clinical training was 3.15 of 5. In the detailed question, 'satisfaction of clinical training' got 3.38 as a highest score, the lowest score was 2.86 that is about satisfaction of clinical training period. The average score about efficiency of study was 2.86 and in detailed question, 'a Role model' got 3.26 as a highest score and participation of student got 3.05 as a lowest score. 6. The result of T-test to see the difference of the satisfaction according to the general character and clinic training condition between teaching efficiency is that the degree of satisfaction of clinical training showed statistical significance only in the degree of satisfaction of campus life(p<0.05), and teaching efficiency has a statistical significance with their age, grade, and satisfaction of campus life (p<0.05). 7. The relation between of teaching efficiency of clinical training and satisfaction of clinical training of dental technologic student has a statistical meaning in significance leveler 0.01. Now, therefore we suggest following based on these result. 1. To elevate satisfaction of clinical training, it agentry needs development of consistent clinical training curriculum. 2. To grasp the satisfaction and requirement, in needs to measure anxiousness and satisfactory degree after completing training 3. To train efficiently and evaluate efficiency over the teaching activities, it needs to develop measuring tools for teaching efficiency in terms of teacher's important rules in a clinical training. 4. Strengthen the relations with the study developing and managing curriculum gathering theoretical knowledge and practice. And make an effort to apply to their students. 5. Let the trainee take a class setting a belief, sense of value, function and obtain behavior by making the students comfort over clinical training as increasing teaching efficiency.

• 가족자원경영과 정책
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• 제25권3호
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• pp.103-120
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• 2021

본 연구는 맞벌이와 외벌이 아버지의 미취학자녀 돌봄시간의 변화를 파악하고 아버지의 자녀돌봄 활동의 특성 변화를 규명하기 위하여 돌봄의 하위활동영역을 각각 필수돌봄, 발달돌봄, 기타돌봄으로 분류하였다. 이를 위해 통계청 생활시간조사자료 중 2004, 2009, 2014, 2019년의 4개 연도 15년간의 자료를 사용하여 평일(근무일)의 아버지 자녀돌봄시간과 참여율을 분석하였다, 본 연구의 주요결과는 다음과 같다. 첫째, 아버지가 미취학자녀를 돌보는 시간은 증가 추이를 나타냈다. 특히, 맞벌이 아버지는 2004년과 비교하여 2019년에 자녀돌봄시간이 24분 증가하여 15년 동안 2배 가량의 증가를 보였다. 둘째, 아버지의 돌봄유형을 분석한 결과, 2004년에는 생존과 직결되지 않고 간헐적 참여가 가능한 발달돌봄 참여율이 자녀의 생존과 건강유지를 위한 필수돌봄에 참여율보다 적었으나, 2019년에는 외벌이 아버지는 필수돌봄과 발달돌봄 참여율이 유사하였고, 맞벌이 아버지는 필수돌봄 참여율이 더 높게 나타났다. 셋째, 아버지의 자녀돌봄시간에 영향을 미치는 변수에는 아버지의 연령, 교육수준, 성평등의식, 시장노동시간, 출퇴근시간 등이 통계적으로 유의하였다. 특히, 시장노동시간은 모든 조사시기에 영향을 미치는 변수였으며, 성평등의식은 외벌이 아버지 집단에서 최근까지 영향을 미치는 변수로 나타났다. 이상의 연구결과는 맞벌이 아버지와 외벌이 아버지 모두 자녀돌봄시간이 점차 증가하는 추세를 보였으며, 특히 발달돌봄뿐아니라 필수돌봄에 사용하는 시간이 늘어났다는 점에서 부모의 공동양육 책임이 실현되는 방향으로의 긍정적 변화를 시사한다. 또한, 이는 지난 15년간의 아버지 자녀돌봄 행태의 변화에 대한 이해를 위한 기초자료로 사용될 수 있으며, 향후 가족친화 정책의 구체적 과제를 제안하고 지역사회 등에서 아버지 대상 자녀돌봄 프로그램을 개발하는 근거자료로 활용될 것으로 기대된다.