智島의 有形文化

崔啓遠 국립목포대학교 도서문화연구원 1987 島嶼文化 Vol.5 No.-

미숙아와 만삭아에서의 눈물막 기능과 눈표면 상태의 비교

최계원,이해영 대한안과학회 2006 대한안과학회지 Vol.47 No.4

Purpose: To describe the ocular surface and tear function findings in premature and term babies. Methods: Sixty eyes of 30 premature babies and 60 eyes of 30 healthy term babies were studied. The subjects underwent routine ophthalmic examinations: corneal sensitivity test, corneal fluorescein test, Schirmer test with anesthesia, tear breakup time test, lipid layer pattern test and conjuctival impression cytology. Results: The mean corneal sensitivity scores were 35.2±5.0 mm and 54.2±3.7 mm in the premature and term babies, respectively (P0.001). Mean squamous metaplasia scores were 1.05±0.59 in the premature and 0.18±0.39 in the term babies (P

아크릴릭 인공수정체안에서 동공영역으로 증식하는 전낭하 상피세포

최계원,황영훈,문상웅,김재호,Gye Won Choi,M,D,Young Hoon Hwang,M,D,Sang Woong Moon,M,D,Jae Ho Kim,M,D,Ph,D 대한안과학회 2007 대한안과학회지 Vol.48 No.1

Purpose: To report upon two cases of anterior capsule opacification (ACO) proliferating into the pupillary region of the anterior surface of a single piece acrylic AcrySof? intraocular lens (IOL) (SA60AT, Alcon Laboratories, Inc., USA). The surgical removal of the ACO was also reported. Methods: An 80-year-old woman and a 75-year-old woman underwent phacoemulsification with implantation of a single piece foldable AcrySof? IOL in the posterior capsular bag. ACO proliferating from the opposite sides of the IOL along the central axis were found three months after surgery. To recover visual acuity in the 80-year-old woman`s eye, ACO was surgically removed with a Sinskey hook and irrigation and aspiration system. Results: The patient`s visual acuity was recovered after surgical removal of the ACO. Histopathologic findings of the removed tissues revealed fibroblastic proliferation of lens epithelial cells. The ACO in 75-year-old woman`s eye was not treated, as it was not associated with a visual disturbance. Conclusions: In eyes containing an AcrySof? IOL, clinically significant ACO proliferation into the pupillary region along the central axis can occur. Surgical removal can be beneficial for recovery of visual acuity.

건성안에서 인공누액 점안 후의 안구 수차의 변화 양상

최계원,문상웅,주명진 대한안과학회 2006 대한안과학회지 Vol.47 No.2

Purpose: To identify the effects of artificial tear instillation on tear film changes using wavefront aberrations. Methods: Artifical tear was instilled every 2 hours for 14 days into 20 normal eyes and 20 dry eyes. The changes in tear film using wavefront aberrations were analyzed 1 minute after the final instillation of artifical tear. Results: In dry eyes, total wavefront aberration and total high order wavefront aberration decreased significantly (p

2003년 한국 취학전 아동 시력검진결과

최계원,구본술,이해영,Kye Won Choi,Bon Sool Koo,Hae Young Lee 대한안과학회 2006 대한안과학회지 Vol.47 No.1

Purpose: To report the results of preschool vision screening in South Korea in 2003. Methods: Nation wide, population-based vision screening tests were conducted in preschool children over the age of 3 years from March to September 2003. The first step involved home-screening using picture cards. The children who did not pass the first test were sent to public health care centers, where their visual acuity was re-tested. After the re-tests, some children were referred to ophthalmologists. The referral criteria for visual acuity were: age 3, less than 0.5 visual acuity; age 4 or older, less than 0.63 visual acuity in at least one eye. Results: Among 56,836 subjects who had been enrolled, 2,637 (4.6%) children were referred to ophthalmologists. Refractive error was found in 1,746 (66.2%) children. Amblyopia was discovered in 480 (18.2%) children. Anterior segment abnormalities were detected in 269 (10.2%) children, manifest strabismus was detected in 169 (6.4%) children, and fundus abnormalities were found in 17 (0.6%) children. Myopic astigmatism (31.0%) was the most common type of refractive error. Refractive error (87.9%) was the most common cause of amblyopia and exodeviation (63.9%) was the most common type of strabismus. Conclusions: From the results of the 2003 Preschool Vision Screening, we collected data about the ophthalmic abnormalities that can affect visual development in children. This information will foster improvement in the overall quality and design of preschool vision screening systems.

대한공업교육학회지의 출판 동향 분석: 1976년~2021년까지

최계원,이영민 대한공업교육학회 2022 대한공업교육학회지 Vol.47 No.1

The paper aims to analyze publication trend and research productivity, targeting papers published for the past 46 years in the Journal of Korean Institute of Industrial Education, which is a representative academic journal in the industrial education. For the publication trend analysis, the content analysis was conducted and research productivity of authors was investigated through Lotka’s Law. The research subjects were 1,019 papers published on the Journal of Korean Institute of Industrial Education from 1976 to June 2021. Research findings are as follows. First, the pattern of writing showed that the percentage of co-authors over 2 was higher than a single author. Second, the authors were most likely to belong to the university, followed by university, elementary and secondary schools, government agency, affiliated organization, and public institutions. Third, the flow of records in giving paper showed that the number of continuants has decreased from time and only a few writers have presented their papers. Fourth, the analysis results from the research productivity discovered difference in actual figure and revised, theoretical one, which indicates that Lotka‘s Law was not applied to the Journal of Korean Institute of Industrial Education. Based on findings as shown below, this study suggests plan to develop the Journal of Korean Institute of Industrial Education and increase research productivity in the future. 본 연구는 공업교육분야의 대표 연구 학술지인 대한공업교육학회지에 지난 46년간 게재된 논문들을 대상으로 출판 동향을 분석하였다. 출판 동향 분석을 위해 학술지 내 용 분석을 실시하였고 Lotka법칙을 적용하여 저자의 연구 생산성을 파악하였다. 분석 자료는 1976년부터 2021년 6월까지 대한공업교육학회지에 게재된 1,019편의 논문이었 다. 분석결과는 다음과 같다. 첫째, 저술 유형 분석결과 단독 저술보다 2인 이상 공동 의 비율이 높았다. 둘째, 저자의 소속기관은 대학교가 가장 많았고 대학교, 초중등교육 기관, 정부부처·산하기관·공공기관순으로 나타났다. 셋째, 논문 발표 실적 흐름은 시간 이 경과할수록 지속저자의 수가 감소하였고 소수의 저자들만이 지속적으로 다수의 논 문을 발표하였다. 넷째, 연구 생산성 분석결과 실제치와 수정 이론치의 차이가 있어서 대한공업교육학회지는 Lotka법칙을 적용할 수 없었다. 이상의 분석결과를 바탕으로 향 후 대한공업교육학술지의 출판 활성화와 연구 생산성을 높일 수 있는 방안들을 제언하 였다.

Opportunistic Scheduling Algorithm for Throughput Maximization in Cooperative Communication

최계원,정동근,전화숙 에스케이텔레콤 (주) 2009 Telecommunications Review Vol.19 No.2

Recently, a novel technology called cooperative communication has attracted great attention due to its benefits of achieving multiple antenna gain with multiple single antenna devices. In this paper, we propose a cooperation technique based on the hybrid automatic repeat request (HARQ), which adapts its transmission mode opportunistically according to channel qualities in order to maximize the capacity. We first present a basic HARQ-based architecture for opportunistic cooperation. This architecture enables the system to select which channel to use among the source-destination, relay-destination, and source-relay channels on the basis of the qualities of these channels. The cooperative scheduler takes charge of deciding the channel to use. To design the cooperative scheduler, we formulate the optimization problem of which the target is to maximize the throughput, and solve it by using the dual optimization technique. We present the simulation results showing that the proposed scheme outperforms the non-cooperative scheme.

고령자의 은퇴 기대에 관한 잠재프로파일 분석

최계원,이영민 계명대학교 사회과학연구소 2022 한국사회과학연구 Vol.41 No.2

The purpose of this study was to classify the aged’s retirement expectation groups and investigate factors that influence each group. To classify the retirement expectation group, the latent profiles analysis (LPA) was carried out targeting 422 non-retired aged over 60. It turned out they could be classified into three types as follows; 'reality-adaption group', 'future-oriented group', and 'reality-satisfaction group.' The group where accounted for largest portion was 'reality-adaption group' who did not have high level of education with low family income and elementary workers were overwhelmingly in the majority in this group. ‘Future-oriented group’ showed high economic level, expectation for future and satisfaction on their present life but their job satisfaction was lowest. ‘Reality-satisfaction group’ showed highest job satisfaction but recorded lowest expectation for future and satisfaction on their present life. OLS was conducted in an attempt to analyze factors that influence the best age to retire and it turned out there’s no significant difference in the best age to retire between groups. Based on research findings, it’s expected to formulate more targeted policies on the retirement issues of the aged. 본 연구는 고령자의 은퇴 기대 집단을 유형화하고, 각 유형에 영향을 미치는 요인이 무엇인지를 파악하고자 하였다. 은퇴 기대 집단을 유형화하기 위해 60세 이상 422명의 비은퇴자를 대상으로 잠재프로파일분석(LPA)을 실시하였으며, 분석결과, ‘현실순응형’, ‘미래지향형’, ‘현실만족형’의 세 가지 유형으로 분류되었다. 이 중 가장 많은 비중을 차지하는 집단은 ‘현실순응형’이었으며, 이들은 학력과 가구 소득이 낮고 단순노무 종사자가 다수를 차지하고 있었다. ‘미래 지향형’은 경제적 수준이 높고, 미래에 대한 기대와 현재 삶의 만족도가 높은 반면, 일자리 만족도는 가장 낮은 특성을 지니고 있었다. ‘현실 만족형’은 일자리 만족도가 가장 높은 반면, 미래에 대한 기대감과 현재 삶의 만족도 수준은 가장 낮은 특성을 보였다. 은퇴 희망 연령의 영향 요인을 분석하기 위하여 OLS를 실시한 결과, 은퇴 희망연령은 집단 간 유의한 차이가 없는 것으로 나타났다. 본 연구 결과를 토대로 고령자들의 은퇴에 대해 보다 표적화된 정책 대응 방안을 마련할 수 있을 것으로 기대한다.

[주제Ⅰ] 마을조사와 향토사연구

崔啓遠 목포대학교 도서문화연구소 1986 島嶼文化 Vol.4 No.-

기업 교육훈련의 시장 실패와 정부 개입의 효과 분석

최계원,이영민 한국기업교육학회 2023 기업교육과인재연구 Vol.25 No.2

The purpose of this study is to systematically review the feasibility of the failure of the corporate education and training market and the government’s intervention in the vocational education and training market through the analysis of corporate education and training investment. To empirically review this, panel regression analysis was conducted using the 4th to 7th data of the Human Capital Enterprise Panel Survey I. The investment index of companies’ education and training was set as education and training expenses compared to labor costs and per capita education and training expenses, and the independent variables were set as participation in government projects and market failure. The analysis results are as follows. First, no evidence has been found that market failure due to the problem of manpower theft has a significant effect on companies’ investment in education and training. However, the government’s intervention was found to positive effect the investment in education and training expenses per capita compared to labor costs. Second, the control variable found that the ratio of women, the ratio of regular workers, the age of companies, the size of companies, and the presence or absence of unions affect investment in education and training. Based on these empirical analysis results, a plan was proposed to increase the effectiveness of the government’s intervention in education and training 본 연구의 목적은 기업 교육훈련에서 관련 변인들을 통제한 후, 시장실패와 정부 개입의 효과성을체계적으로 분석하는 것이다. 이를 실증적으로 검토하기 위해 인적자본기업패널조사Ⅰ 4∼7차 자료를 활용하여 패널회귀분석을 실시하였다. 기업의 교육훈련 투자 지표는 인건비 대비 교육훈련비와 1 인당 교육훈련비로 설정하고 독립변수는 정부사업 참여와 시장실패로 설정하였다. 분석 결과는 다음과 같다. 첫째, 인력 탈취 문제로 인한 시장실패는 기업의 인건비 대비 교육훈련비와 1인당 교육훈련비 투자에 유의한 영향을 미친다는 근거가 파악되지 않았다. 그러나, 정부의 개입은 인건비 대비 교육훈련비와 1인당 교육훈련비 투자에 정적인 영향을 미치는 것으로 나타났다. 둘째, 통제 변수에서는여성 비율, 정규직 비율, 기업연령, 기업 규모, 노조 유무가 교육훈련 투자에 영향을 미치는 것으로나타났다. 이러한 실증분석 결과를 바탕으로 정부의 교육훈련에 대한 개입 효과성을 높일 수 있는방안을 제시하였다.