• 디지털융복합연구
• /
• 제16권3호
• /
• pp.303-309
• /
• 2018

컴퓨터 비전 기술은 인공지능의 한 분야로 인간의 눈의 기능을 기계가 수행 할 수 있도록 카메라로부터 영상 이미지를 취득하고, 알고리즘을 통하여 분석하고 판별한 후 생산부품의 양품과 불량을 판별하는 부품 검사에 많이 적용되고 있다. 볼트 생산 시스템에서 생산되는 볼트 탭의 유무를 컴퓨터 비전 기술을 적용하여 자동으로 불량품을 선별하는 장치를 개발하였다. 형상검사 방법으로는 라인 스캔방식으로 검사영역의 시작점과 끝점의 위치를 파악하여 높이를 측정하는 방법을 사용하였으며, 볼트 탭의 유무를 판별하기 위한 방식으로는 원형 스캔방식으로 검사영역의 평균 밝기 값의 차이를 측정하여 유사도를 구하는 방식을 사용하였다. 두 종류의 볼트 탭의 검사 성능실험에서 총 검사에 소요되는 시간은 분당 300개 검사가 가능하며, 완벽한 검사 정확도를 나타내어 생산라인에서 검사의 정확성과 효율성을 입증하였다.

• 한국강구조학회 논문집
• /
• 제21권4호
• /
• pp.413-420
• /
• 2009

일반적으로 대형 지붕구조나 초대형 보와 같은 대형 구조물을 양중하는 방법은 유압잭이 이용된다. 또한, 양중시 안전을 위하여 CCTV를 이용하여 각 포인트에 설치된 줄자를 모니터링하여 레벨체크를 수행하고, 상대 변위가 기설정된 한계를 벗어나면 유압잭을 정지하고 상대변위를 수동으로 조정한 후에 양중을 수행하였다. 그러나, 이러한 종래의 양중 방법은 CCTV를 육안으로 확인하여 레벨을 체크하기 때문에 정확도가 높지 않았고, 실시간 계측은 현실적으로 불가능하였다. 이러한 문제를 개선하기 위하여 자동추적형 토탈스테이션, 레이저 거리계, 데이터로거, 변형도게이지 등을 이용하여 대형 구조물 양중시 적용할 수 있는 계측-평가 시스템 구축하였다. 시스템을 구현하기 위한 프로그램 작성 후 실험실에서 시연을 통해 계측-평가 데이터의 정확성 및 활용 가능성을 평가하였으며, 안정적인 데이터 취득 및 연산을 통해 적용성이 검증되었다.

• 한국소성가공학회:학술대회논문집
• /
• 한국소성가공학회 2006년도 춘계학술대회 논문집
• /
• pp.295-299
• /
• 2006

The inner-structure bonded(ISB) sheet metal is defined as a composite sheet metal which has middle layer of truss-structure between two skin sheets. The characteristics such as ultra-light weight, high rigidity, high strength, etc are required especially for automobile parts. The characteristic of ISB sheet metal depends on inner-structure pattern or method of bonding. Pyramid type of crimped expanded metal is used for inner-structure and both of resistance welding and adhesive bonding are applied to make a specimen. As a result of compression test, it is appeared that forming limit is 10% reduction in thickness under a load of 8kgf per unit element(one inner-structure). In case of uniaxial tensile test the non-uniform surface integrity rather than the buckling of inner-structure happened at a load of 450kgf, which indicates elongation of 7.2% and thickness reduction of 13%. The eye-inspection method was applied to examine the defects occurring on the specimen during stretch forming. In case of biaxial stretch forming only the non-uniform deformation on the surface of a skin sheet could be observed. The forming limit in stretching of ISB sheet metal with the hemi-spherical punch of 150mm in diameter was 3mm in forming depth and 5% reduction in thickness.

• 한국환경과학회지
• /
• 제13권6호
• /
• pp.497-503
• /
• 2004

In this research, we have performed a T-test to see how the relationship between dependent variable or visual point level and independent variable or visual quantity is in order to clear up the correlation between pattern of visual point and visual quantity by the constituents of a view from a different visual point level and the results are as follows: 1) In case of the character of Mt. Uam landscape of the city, Uamsan is set as a fixed point and about a direction of view(D), the north is a datum point from which the range of direction is distributed within 1800 westwardly and the visual range(R) is also within 2000m. An elevation is an average of 7.40 and the average story of the buildings is 3.85. Here the height of a story is about 4m so the average of the visual point difference is estimated at 15.4m. 2) The type of visual point is divided into the intersection group and the front of the highly used public buildings group. Double intersection types account for about 78.80%(52 spots) which forms a majority part of LCP. 3) The analysis of the difference of visual point level divided by eye level and that of the top of the buildings has been proved that there's a sharp difference resulted from t-test at 1 % significant level. The significant difference of elevation from height difference(l5.93m), however, has not been shown. 4) From the result of T-test about visual quantity by the elements of a view from a different visual point level, the visual quantity of mountain(VQM), sky(VQS), ground(VQG) is significant at about 1% each and that of building(VQB) is at about 5%. The difference in visual quantity of a mountain by the visual point level is at about 4% which can meet a marginal level of LCP necessary for evaluation of mountainscape.

• 한국의상디자인학회지
• /
• 제15권2호
• /
• pp.15-26
• /
• 2013

The purpose of this study is to offer basic data for designing and making of brassiere with the consideration of the physiological nature of man. Each of 3/4-cup wired upward-support-type Mold Bra of 75 size with basic pad made at three representative domestic companies (A, B and C Company) was selected for analysis of pattern and components. The following is the result of this study. 1. That Company A's bra had the highest cup, relatively narrow width, the widest front-center and the highest front center at front pad. That of Company B had relatively short wing over the base and much difference at the height of cup depending on the presence of wire. That of Company C had low and wide cup, the widest bust span and the front center width, the front center height of front pad, the base length of front pad and the length of wings were observed to be of the figures between those of Company A and B. 2. The Bra of Company A had the biggest front center angle of $6^{\circ}$, while that of Company C had the biggest wing angle of $18^{\circ}$. The Bra of Company B showed the biggest difference of patterns depending on the presence of wire. Those of Company A and C showed very similar shape when wire was inserted. 3. The order of making brassiere is following: making of exterior mold cup${\rightarrow}$ sewing exterior cup and circumference of mold${\rightarrow}$ sewing base and wings${\rightarrow}$ sewing binding tape to base${\rightarrow}$ sewing cup and main pad${\rightarrow}$ sewing binding tape to upper sides and upper part of wings${\rightarrow}$ sewing wire-tape to interior base of cup${\rightarrow}$ inserting of wire inside wire-tape${\rightarrow}$ sewing hook & eye on the back of wings${\rightarrow}$ sewing shoulder string.

• 한국직업건강간호학회지
• /
• 제26권3호
• /
• pp.184-196
• /
• 2017

Purpose: We investigated the effects of emotional labor and workplace violence on various physical and mental health outcomes among female workers. Methods: We obtained data from 24,760 female workers who participated in the 4th Korean Working Conditions Survey (2014). Hierarchical logistic regression analysis was used to analyze the relationships. Results: Female emotional workers were more exposed to workplace violence than were female non-emotional workers. Verbal abuse was the most common type of workplace violence. Logistic regression analyses revealed that (1) emotional labor was significantly associated with higher odds of having musculoskeletal or abdominal pain (physical health outcomes), along with overall fatigue (a mental health outcome), and (2) workplace violence experiences were significantly associated with higher odds of musculoskeletal pain, headache/eye strain, abdominal pain, depression/anxiety disorder, overall fatigue, and insomnia/sleep disturbance, after controlling for covariates. Conclusion: This study demonstrated that both emotional labor and workplace violence have negative effects on physical and mental health. However, workplace violence experience has a stronger negative impact on health outcomes than does emotional labor alone. A management system to eradicate workplace violence and programs aimed at managing emotional labor are urgently needed at the organizational level.

• 한국융합학회논문지
• /
• 제11권2호
• /
• pp.147-154
• /
• 2020

본 연구는 조절훈련을 통한 기능성 근시개선 효과를 유발할 수 있는, ICT 기반의 시력회복용 웨어러블 디바이스의 개발에 관한 것이다. 시력훈련기기(OTUS)는 헤드마운트 형태를 가지는 웨어러블 디바이스로써 섬모체 근육의 수축과 이완, 눈모음과 눈벌림을 자연스럽게 자극하는 조절 훈련기기이다. 사용자는 디바이스를 통해 저장된 개인 시력정보를 바탕으로 맞춤형 시력훈련을 진행할 수 있다. 실험에서는 기능성 근시를 유발한 후 두 그룹(비교군 16명, 조절훈련군 16명)에 대해 조절훈련으로 인한 증상의 개선 효과를 비교 분석하였다. 그 결과 조절훈련군에서 기능성 근시가 평균 0.44D±0.35(p<0.05)로 개선되었다. 이 연구가 시력훈련기기(OTUS)의 기능성 근시에 대한 유효성을 밝히고 있지만, 기능성 근시를 장기간 제어할 수 있는 가능성을 입증하기 위해 추가적인 임상시험이 필요할 것으로 판단된다.

• Journal of Plant Biotechnology
• /
• 제36권3호
• /
• pp.275-280
• /
• 2009

Direct shoot regeneration from leaf or internode or petiole segments was conducted in 33 cultivars of chrysanthemum. Shoot regeneration rates varied according to cultivars, culture media, and explant types. The high shoot regeneration rate of more than 70% in 15 cultivars (‘Pink Pangpang’, ‘Orange Memory’, ‘Relance’, ‘Zinba’, ‘Beakma’, ‘Innocence’, ‘Sunny Pangpang’, ‘Euro Yellow’, ‘Dublin’, ‘Boramae’, ‘Peak’, ‘Euro White’, ‘Vesuvio White’, ‘Linneker Salmon’ and ‘Pink Pride’) and 2 ones (‘Forward’ and ‘Agason’) was obtained from the segments of leaves and internodes, respectively, cultured on MS medium containing 1.0 mg-$L^{-1}$ BAP, 0.5 mg-$L^{-1}$ IAA and 30 g-$L^{-1}$ sucrose. That in 6 cultivars (‘Shuhonochikara’, ‘Hakunosen’, ‘Whitney Pangpang’, ‘Plaisir D’Amour’, ‘Grace’ and ‘Kumsu’) was observed from the segments of leaves or internodes cultured on 1/2 MS medium 1.0 mg-$L^{-1}$ BAP, 0.5 mg-$L^{-1}$ IAA and 15 g-$L^{-1}$ sucrose In case of 3 cultivars (‘Ilweol’, ‘Puma White’ and ‘Sharon’), when internode explants excised from mother plants, which were pre-cultured on MS medium containing 2 g-$L^{-1}$ activated charcoal and 30 g-$L^{-1}$ sucrose for two months in the dark, and cultured on MS medium containing 1.0 mg-$L^{-1}$ BAP, 0.5 mg-$L^{-1}$ IAA and 30 g-$L^{-1}$ sucrose, that was shown. Seven cultivars including ‘Puma Yellow’, ‘Argus’, ‘Yes Morning’, ‘Whiparam’, ‘Hakunohikari’, ‘Charming Eye’ and ‘Moon light’ requires more improved culture conditions. Tissues with the highest shoot regeneration rate were in descending order, leaf, petiole, and internode segments.

• 의학교육논단
• /
• 제22권3호
• /
• pp.198-206
• /
• 2020

This study aimed to identify needed improvements to current evaluation methods in medical school computer-based test (CBT) programs and test environments. To that end, an analysis of the importance and satisfaction was conducted through a survey of 3rd and 4th year medical students who had sufficient experience with CBT programs. Importance performance analysis methodology using the correlation coefficient was applied to assess average satisfaction and importance. The first quadrant (keep up the good work) was a factor of review and time management and test facilities among the conveniences of the CBT program. The second quadrant (concentrate here) was a factor of the convenience of the CBT program and computer monitor and chair factor within the test facilities. The third quadrant (low priority) was a factor of cheating and computer failure. The fourth quadrant (possible overkill) was the location, spacing, and temperature factors of the test facilities. Improvements are needed to reduce 'eye fatigue' and help students focus and understand the questions in the CBT programs. It is necessary to improve computer monitors, desks and chairs, and consider the subject's body type and manager in order to cope with computer breakdown and peripheral failures. Spare computers are needed. These findings are meaningful in that they have been able to identify factors that require improvement in the CBT program and test environment resulting from changes in assessment tools.

• 한국안광학회지
• /
• 제13권4호
• /
• pp.1-8
• /
• 2008

목적: 관련 이익 집단의 대학 안경광학과 부설 안경원의 필요성에 대한 인식 정도와 운영형태에 관한 의견을 조사하였다. 대상 및 방법: 현업 안경사 집단 50명과 안경광학과 재학생 및 일반인 집단 51명을 대상으로 설문을 통하여 대학 부설 안경원에 대한 의견과 예상되는 긍정적 또는 부정적인 효과, 업무 허용범위, 운영방식 등에 대하여 질의하고 그에 대한 답변을 바탕으로 집단별 통계를 분석하였다. 결과: 대부분의 응답자들은 대학 부설 안경원 설립에 긍정적인 반응을 보였으며, 부설 안경원을 통한 임상실습교육으로 안경광학과 졸업생의 검안능력을 향상시킬 수 있으리라 기대하는 것으로 나타났다. 결론: 한국에서 대학 부설 안경원의 설립운영은 임상분야의 교육과 연구에 크게 기여할 것으로 기대되며, 설립을 위하여 법률적인 제도 개선과 각 대학 안경광학과의 적극적인 추진노력이 요청된다.