Effects of Aging and Chronotype on Sleep Habits in Korean Workers

박영만,서유진,마츠모토 카즈야,Park, Young-Man,Seo, Yoo-jin,Matsumoto, Kazuya The Ergonomics Society of Korea 2000 대한인간공학회지 Vol.19 No.3

The Korean version of the morningness-eveningness questionnaire (MEQ) and sleep habits inventory were administered to 1,038 Korean male daytime workers and were analyzed according to age and chronotype to determine what these factors reveal about sleep habits in view of phase difference of circadian rhythm. The mean and distribution of scores on the MEQ moved significantly toward the morning type with aging. Bedtimes and waking times were progressively later from the morning, intermediate, to evening types, and were also earlier with aging. Preferred bedtimes and waking times showed more distinct differences than did the habitual times in each chronotype. The percentage of subjects who answered that sleep length was 'short', mood upon waking was 'bad', and variabilities of bedtime and sleep length were 'large' were greater in the young and evening types than in the elder and morning types, respectively. These findings suggested that subjects were shifted toward the morning type and the phase of circadian rhythm had moved forward with aging. Preferred bedtime and waking time were a better reflection of individual circadian rhythms than habitual bedtime and waking time.

함정의 다기능레이더(MFR) 자원할당 방안에 관한 연구

박영만,이진호,조현진,박경주,김하철,임요준,김해근,이호철,정석문,Park, Young-Man,Lee, Jinho,Cho, Hyunjin,Park, Kyeongju,Kim, Ha-Chul,Lim, Yo-Joon,Kim, Haekeun,Lee, Hochul,Chung, Suk-Moon 한국시뮬레이션학회 2019 한국시뮬레이션학회 논문지 Vol.28 No.1

A warship equipped with Multi Function Radar(MFR) performs operations by evaluating the degree of threats based on threats' symptom and allocating the resource of MFR to the corresponding threats. This study suggests a simulation-based approach and greedy algorithm in order to effectively allocate the resource of an MFR for warships, and compares these two approaches. As a detection probability function depending on the amount of allocations to each threat, we consider linear and exponential functions. Experimental results show that both the simulation-based approach and greedy algorithm allocate resource similarly to the randomly generated threats, and the greedy algorithm outperforms the simulation-based approach in terms of computational perspective. For a various cases of threats, we analyze the results of MFR resource allocation using the greedy algorithm.

수중 표적 탐색전술 분석용 시뮬레이션 시스템 설계 및 개발

박영만,신성철,Park, Young-Man,Shin, Seoung-Chul 한국정보통신학회 2009 한국정보통신학회논문지 Vol.13 No.12

해군에서는 수중 표적을 효과적으로 탐색하기 위한 소나운용전술을 개발하기 위해 노력하고 있다. 효율적인 소나운용전술 개발을 위해서는 먼저 다양한 소나운영전술에 대한 효과도를 분석할 수 있는 시뮬레이션 시스템이 필요하다. 시뮬레이션 시스템은 해양환경 정보, 자함 정보, 소나 정보, 그리고 수중표적의 정보를 매개변수로 입력받아 소나운용전술에 대한 시뮬레이션을 수행하며, 시뮬레이션의 진행에 따른 다양한 정보를 제공할 수 있어야 한다. 본 연구에서는 다양한 환경에서 수중표적에 대한 함정의 최적 탐색 전략을 평가할 수 있는 탐색효과도 분석용 시뮬레이션 시스템을 설계 개발하였다. 시뮬레이션 시스템은 소나방정식 및 탐지확률곡선을 이용할 수 있도록 개발되었으며, 표적의 실제적인 행동패턴을 고려하여 여러 가지 형태의 기동 패턴을 시스템에 묘사하였다. 개발된 시스템은 앞으로 수중표적에 대한 효율적인 소나운용전술을 개발하고 발전시키는데 유용하게 사용될 수 있을 것으로 판단된다. The Navy is trying to develop a sonar-operation strategy that efficiently searches for underwater targets. To develop an efficient sonar-operation strategy, a simulation system, which can analyze the efficiency of various operation strategies, is needed. The simulation executes the strategical operation by collecting information of sea environment, destroyer, sonar, and target. Also, it should be able to provide diverse information according to its progression. In this study, the simulation system that can evaluate and analyze the effectiveness of the search strategy for underwater targets in different environments was designed and developed. The simulation system was developed, utilizing the sonar equation and the lateral-range-curve, and it portrays many patterns of realistic movements of a target. This system will contribute to developing and improving efficient sonar-operation strategies to find underwater targets in the future.

유아체육 지도자의 안전관리 인식에 대한 연구

박영만 ( Park Young-man ) 한국융합과학회 2021 한국융합과학회지 Vol.10 No.6

Purpose: This study has the necessity and purpose of research to establish a safety culture of safe children's physical activity through research on safety management perceived by early childhood sports leaders. Methods: This study was conducted from September 1 to September 30, 2021 using in-depth interview, which is a qualitative research technique, targeting six children’s physical education specialists over 5 years of age who were selected by the objective sampling method. Result: First, the awareness of safety management of facilities and equipment of early childhood sports recognizes the safety of the use of space and teaching aids necessary for early childhood activities, and prevents safety accidents through the use of safe spaces for facilities and safe teaching management. It can be prevented. Second, the awareness of safety management of early childhood sports safety accident prevention activities and follow-up measures should improve the educational environment of leaders through safety management manuals for a high-quality educational environment and institutional improvement on liability for compensation. Third, the awareness of safety management of human resources and safety education necessary for coping and prevention of safety accidents by early childhood sports leaders should be unified and systematic by developing professional leaders' educational programs and safety education manuals. Conclusion: Early childhood physical education Along with the development of systematic safety management manuals necessary for activities, it is necessary to develop safety training manuals that can be applied to various environments.

복합환경 통합 시스템 개발에 관한 연구

박영만(Young-Man Park),안동순(Dong-Soon Ahn) 한국컴퓨터정보학회 2000 한국컴퓨터정보학회논문지 Vol.5 No.1

High - technology horticulture institution needs automation of environment management work to control complex environment, which is not accomplished in domestic production. In this paper, complex environment union system for institute's automation of environment management such as warm, heating, humidification, dehumidify and ventilation is developed to provide general farmhouses institute with the automatic system at a low cost. The complex environment union system being developed will be promising in applications such as office automation and remote monitoring system.

신변보호사 전문성 제고를 위한 자격제도 개선방안

박영만 ( Young-man Park ),정귀영 ( Kwi-youn Jung ) 한국융합과학회 2016 한국융합과학회지 Vol.5 No.1

Purpose: To enhance the professionalism of private security market (Inc)Korea Security Association, the result of several personal bohosa eligible to apply for a nationally recognized qualification December 2012 was recognized as a nationally recognized qualification. Therefore, this specification is intended to discuss the qualifications for personal improvement bohosa enhance professionalism. Methods: Review of previous studies on the personal bohosa and analyze the statistical data and to achieve the object of this study. Results : First, the current basic training and completion time is remarkably short by expanding conducted training on the various equipment for training and positive law, seamless equipment utilization not against the law in carrying out the practice. Second, to strengthen the eligibility criteria of training lecturers and personal bohosa to receive qualitatively improved education. Third, improve the education and maintenance of personal credibility bohosa qualified to respond to a rapidly changing era flow and enforce eligible party management through refresher training. Conclusion: And this is like three kinds of improvements suggested above, is expected to contribute to the skills of personal bohosa, will be eligible issuing the (Inc)Korea Security Association efforts followed to be a personal bohosa eligible for recognition in the field.

크레인 대수의 제약을 고려한 선석계획 문제에 대한 발견적 해법

박영만(Young-Man Park), 김갑환(Kap Hwan Kim) 한국항해항만학회 2011 한국항해항만학회지 Vol.35 No.1

This paper discusses the problem of scheduling berth and container cranes simultaneously in port container terminals. A mixed-integer programming model is formulated by considering various practical constraints. A heuristic algorithm is suggested for solving the mathematical model. A numerical experiment was conducted to test the performance of the suggested heuristic algorithm.

시큐리티 종사자의 내부 서비스품질 인식 요인의 중요도 분석

박영만 ( Park Young-man ) 한국융합과학회 2017 한국융합과학회지 Vol.6 No.3

Pupose: The purpose of this study is to analyze the hierarchical importance of the components of security service practitioner `s internal service quality perceptions and to identify their utilization strategies. Methods: The research method used to achieve the purpose of this study is component identification through the first stage expert meeting. In the second stage, hierarchical analysis was performed for the subordinate elements of the constituent parent elements. Conclusion: First, among the sub - factors of upper factor type, the most recent facility proved to be the most important factor. Second, fulfillment is one of the most important factors of reliability. Third, among the sub - factors of responsiveness, business communication was found to be the most important factor. Fourth, among the sub - factors of guarantee, rest and worry were found to be the most important factors.

공연예술 서비스업의 코로나-19 환경 대응 안전관리 전략

박영만 ( Park¸ Young-man ),유진주 ( You¸ Jin-zoo ) 한국융합과학회 2020 한국융합과학회지 Vol.9 No.4

Purpose: This study was conducted with the aim of presenting safety management strategies in the performing arts field by exploring the post-corona era response plan and future prospects in the performing arts service industry and performance hall management. Methods: The research method used to effectively achieve the research purpose is a review of the literature and consultation with a group of experts. The research results identified by the research method are as follows. Result: First, the use of an online platform to verify the health of visitors. Second, it is permitted to perform performances in buildings specializing in independent performance halls. Third, it is necessary to reinforce the management before entering the building by pre-determining and notifying the entrance route of the performance hall building. Fourth, we will develop a viewing service with visitors to the actual concert hall and non-visit visitors. Conclusion: First, it is necessary to continuously monitor the government's post-corona response economic policy and prepare and operate an organization or system for flexible response arrangements. Second, it is necessary to quickly implement a strategy for upgrading the performing arts and cultural contents. Third, it is necessary to respond to the growth trend of the non-face-to-face content industry, which is referred to as untact and on-tact, and strive for innovation.

퍼지회귀분석을 이용한 프로젝트 성과예측

박영만(Young-Man Park),박광박(Kwang-Bak Park) 한국지능시스템학회 2008 한국지능시스템학회논문지 Vol.18 No.6

퍼지회귀분석은 독립변수들과 종속변수간의 관계를 평가하는데 사용된다. 만약 언어적 표현으로 된 자료를 처리할 때 일반적인 회귀분석을 사용한다면 과도한 단순화 때문에 어느 정도 한계를 가진다. 본 논문에서는 프로젝트의 성과를 예측하기 위해 퍼지 입출력을 갖는 퍼지회귀분석을 사용한다. Fuzzy regression model is used in evaluating relationship between the dependent and independent variables. If linguistic data are obtained, ordinary regression have limitation due to oversimplification of data. In this paper, fuzzy regression model with fuzzy input-output data for estimation of project performance is used.