VDT작업별 정신사회적 스트레스와 근골격계 장애에 관한 연구

백남종,강종두,주영수,배인근,권호장,박종만,조수헌,김돈규,김재용,최홍렬 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.4

It has been hypothesized that jobs that have both high psychological demands and low decision latitude("job strain") can lead to musculoskeletal disorder. The objective of this study was to test whether job strain was correlated with the presence of work-related musculoskeletal disorder, especially myofascial pain syndrome(MPS). Information on demographic factors, confounders such as household load and taking care of children or not, and scores for decision latitude, job demand, and social support was obtained by self-administered questionnaire, which had been developed in Korean language, by adopting NIOSH instrument and Extended Karasek Model(16 items). All subjects were also examined by rehabilitation medicine specialists for musculoskeletal disorders. Subjects(n=370) could be categorized into 4 groups, these were, housewives(n=89), shipyard CAD workers(n=89), general female workers(n=79; nurses, insurance counselors, public officials, clerks, etc), and telephone directory assistance operators(n=113). Results from univariate analyses indicated that all demographic factors, all confounders, scores for decision latitude and social support were not associated with the risk of musculoskeletal disorder. However, score for job demand was higher in musculoskeletal disorder cases than others. In subgroup analysis, this association was convinced again, in telephone directory assistance operators. Job strain model showed that the group of telephone directory assistance operators was high-stain group, and OR of musculo skeletal disorder was 2.446(95% C. I. : 1.174, 5.096), when comparing this with the low strain group. In conclusion, job strain is a risk factor for work-related musculoskeletal disorder.

사용자 인식 스마트 홈 미러

최건영,고성화,김종옥,박은서,김완규,백경동,박동규 순천향대학교 부설 산업기술연구소 2021 순천향 산업기술연구소논문집 Vol.27 No.2

The Internet of Things, the core of the Fourth Industrial Revolution, is growing by incorporating various technologies into various fields. Among them, smart home systems that apply IoT technology to home environments are being actively studied. The home hub market, a means of communication for smart homes, is also developing at the same time. As the home hub market develops, security threats are also increasing accordingly. In this paper, 'Smart Home Mirror' is implemented by combining mirror and IoT technologies so that users can use them to communicate with smart home applications and other devices. To meet security issues, users in it are recognized by using face recognition technology and AES between all data communications in it is applied. The proposed device’s usefulness is approved by implementing it in smart home environments.

간척지에서 옥수수 나방류 해충 3종의 발생소장

이휘종,최원영,김상열,서종호,황정동,오성환,정진교,김주일,구현나,김길하 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.2

Occurrence of three troublesome lepidopterous pests, Ostrinia furnacalis, Helicoverpa armigera and Pseudaletia separata in corn cultivation of the reclaimed land were recorded using sex pheromone traps from 2012 to 2014. In case of O. furnacalis adult, two generations were observed in a year and its occurrence pattern was very regular. The 1st generation showed the highest occurrence in late May-early June and the 2nd generation was in late July-early August. On the other hand, H. armigera occurred at least three times a year but its occurrence was somewhat irregular. H. armigera adult showed the highest occurrence in mid May, late June, early August, respectively in 2012 but their occurrence patterns of the 2nd and 3rd generations were varied in 2013 and 2014. In case of P. separata, a few number of adult were captured during the survey period, indicating few number of P. separata migrated from China. Based on the control effect of O. furnacalis by Etofenprox and Carbofuranin 2012, June 26 treatment showed the highest control rate with 96.8% for Etofenprox, 85.8% for Carbofuran, respectively. Late treatment at June 19 and June 26 significantly decreased the control rate of O. furnacalis and June 26 treatment showed the lowest control rate of 1.9% for Etofenprox. 18.1% for Carbofuran, respectively.

강유전성 BaTiO₃의 분극처리에 의한 유사체액 내에서 Calcium Phosphate 생성

송종은,김은주,황규석,임용무,박영준 대한치과기재학회 2000 대한치과재료학회지 Vol.27 No.4

Barium titanate (BaTiO3; BTO) has wide application in industry, particularly in the manufacturing of dynamic random access memory chips, electro-optical switches, optical modulators, shutters, optical mixers, and sensors, owing to its ferroelectric and piezoelectric properties after poling treatment. There has recently been considerable interest in the properties of its role in osseointegration. In this study, we investigated the possibility of treating BTO by poling to improve osseointegration by examining the calcium phosphate (Ca-P) crystal growth behavior on the poled and non-poled BTO surfaces in simulated body fluids (SBF). The BTO samples were sintered at 1350℃ for 2 h in air, producing an average grain size of 7 ㎛, which were confirmed by SEM observation. The sintered BTO samples were then polarized (Ep=5 kV/cm) from 160℃ to 25℃ in a Si oil bath for 2 h. The poled and non-poled BTO samples were immersed in 1.5 SBF for 15 days, or 30 days at 37℃. After the immersion period, the morphological and compositional changes of the surface of the immersed BTO specimens were investigated using a field emission scanning electron microscope (FE-SEM) and an energy dispersive X-ray spectrometer (EDX). Qualitative analysis was then performed using fourier transform infrared (FTIR) analysis. Weak and coarse Ca-P crystals had grown on the surface of the non poled BTO, while a marked difference in the Ca-P forming pattern was visible for the poled BTO, showing the negatively charged surface induces a Ca-P layer more easily. We assumed that rapidly adsorbed cations (Ca2+ ions) on the negatively charged surface at the initial stage acted as nuclei for the formation of Ca-P crystals, while no nuclei would be available on the positively charged surface, due to the fact that sodium chloride (NaCl) crystals were formed owing to anion adsorption (Cl ions). In summary, these results demonstrate that poling the ferroelectric BTO surface negatively the possibility of implant osseointegration.

집단에 따른 노인들의 자가건강관리행태, 일상생활수행능력, 신체적 자기효능감에 관한 연구

김세종,이의철,염원상,서혜림,백영호 釜山大學校 附設 體育科學硏究所 1998 體育科學硏究所 論文集 Vol.14 No.-

This study was carried out to identify the status of self-care, activity of daily living and physical self-efficacy among aged people in Pusan and thus to provide basic data for maintaining health, making affirmative-self among elders. The subjects of this study were 761 elders 65years and over in Pusan. The means of measurement used were the status self-care scale, activity of daily living scale and physical self-efficacy scale. The data was used by One-way Anova, Duncan's Multiple Range and Pearson's Correlation Coefficient as statistical method. The level of significance of all hypotheses tested was p<.05 and the results were as follows; 1) Aged people who participated in elderly academy classes was higher than other groups in the status of self-care statistically significant. 2) Aged people who participated in elderly academy classes and elderly houses ·respect for age association and group were higher than other groups in activity of daily living statistically significant. 3) Aged people who participated in elderly academy classes, elderly house ·respect for age association and just stay at home group were higher than other group in physical self-efficacy statistically significant. 4) Aged people's status of self-care, activity of daily living and physical self-efficacy was statistically significant correlation with each other.

小賣壽命週期에 대한 組織論的 接近

朴琮熙,許永道 울산대학교 1986 연구논문집 Vol.17 No.1

小賣壽命週期理論은 소매상의 進化過程을 설명하는 유력한 이론이나 보다 더 근본적이고 포괄적인 개념이 필요하다고 보고 組織論의 관점을 도입하였다. 소매수명주기를 組織壽命週期로 연장하여 조직이론의 적용가능성을 탐색해 보고 規模와 構造化, 構造化와 效果性과의 관계를 살펴 보았다. 그리고 조직이론이 소매조직에 적용될 때 야기되는 문제도 검토해 보았다. 연구를 통해서 소매진화현상을 조직론의 관점에서 접근할 수 있는 가능성이 풍부하다는 암시를 받을 수 있었다. Retail life cycle theory has considerable utility for explaining the process of retail revolution, though it still needs to expand the concept fundermentally and comprehensively. This study attempts to apply organization theory to retail organization and to gauge the applicability by the review of organization life cycle concept and the relationships between organization size, structure and effectiveness. It also investigates some problems associated with the application of the theory to retail organization. It suggestes that the organization theory offers theoretical foundation to explain the retail evolutionary process.

운동시 성장호르몬 대사에 관한 고찰

백영호,염종우,서혜림 부산대학교 체육과학연구소 2000 體育科學硏究所 論文集 Vol.16 No.-

Through the literature study of the effects on the growth hormone metabolic of exercises, we had a conclusion as follows: 1.During exercises, growth hormone secretion has a variable of exercise Intensity and time, secretion threshold of growth hormone by exercises has a constant latency period of 15∼20 minutes after beginning exercise, and growth hormone secretion reacher to maximum after 30 minutes of the maximum exercises. 2.There are more or less differences of time, but amount of secretion of the growth hormone is shown to be similar according to the gender. 3.Injection of the growth hormone to the elders is shown to be most effective in the case of accompanied with exercises. 4.Because exercises causes the natural secretion of the growth hormone and the metabolic, the constant exercises are needed regardless of ages.

公有林 經營合理化에 關한 硏究 : 太白市 公有林을 中心으로 A Model Analysis of Taebaek City Area

崔鍾天,金東周,徐榮完 江源大學校 林科大學 森林科學硏究所 1993 Journal of Forest Science Vol.9 No.-

본 연구는 江原道 道有林과 太白市 市有林의 經營實態와 문제점을 파악하고 그에 대한 개선 방안을 제시하는데 있으며 연구 결과는 다음과 같다. 1. 江原道 道有林은 25,896ha, 太白市 公有林은 550ha였으며, 太白市 公有林 중 道有林은 470ha, 太白市 私有林은 80ha로서 그의 관리는 太白市에서 담당하고 있다. 2. 太白市 公有林 550ha를 현지 조사한 결과 창죽동 산 1-2번지의 443ha를 제외하고 나머지 107ha는 32개 지역으로 小規模로 分散되어 있었다. 3. 창죽동 산 1-2번지에 소재하고 있는 산림의 경우 석탄공사에서 대부를 받아 석탄을 채취하고 있으며, 나머지 公有林은 小規模로 分散되어 있어 山林經營 生産基盤이 취약하고 經營管理 상태는 매우 열악한 것으로 나타났다. 이와같은 점을 고려해 볼 때 太白市 公有林의 合理的인 經營을 위해서는, 첫째, 小規模로 分散되어 있는 公有林을 團地化 할 필요가 있고, 둘째, 體系的인 經營 計劃을 수립하여 지속적인 木材生産이 가능하도록 유도하여야 하며, 세째, 自然休養林 造成을 고려한 合理的 山地利用 體系를 강구하여야 할 것이다. The situation and the problems of the management of public forest owend by Kangweon provincial and Taebaek municipal governments were investigated throughout literature and field survey. The results were as follows; 1. Kangweon provincial forest is 25,896ha and Taebaek municipal forest is 550ha, which consists of Kangweon provincial forest, 470ha and municipal forest, 80ha. Taebaek city is responsible for the management of the province-owned forest in its administrative district in addition to its own forest. 2. Except San 1-2Changjookdong(443ha) which is leased by Dai Han Coal. Cooperation for mining coal, the remaining forest(107ha) consists of 32 scattered, small-area forest lands. 3. Due to small area and dispersal of municipal forest, the management base for forest production is not sound and the management at present is nearly absent. Based on these actual conditions, the following suggestions are provided for the rationalization for the municipal forest management. First, scattered, small-scale forests should be gathered to prepare a management complex. Second, the sustaining production of timber should be attained through the estblishment of systematic management plan. Third, the reasonable system for forest land utilization shoule be established in consideration of the recreational use of public forest.

주파수 선택적 페이딩 채널에서의 다중반송파 CDMA의 다중채널 결합 검출 성능 분석

황용선,이종훈,김동구 延世大學校 電波通信共同硏究所 1999 電波通信論文誌 Vol.4 No.1

본 논문에서는 다중사용자/다중경로 환경에서 다중반송파 CDMA 시스템의 오류확률을 해석적으로 구하고, 다중사용자, 다중반송파, 다중경로에 의한 간섭의 영향을 분석하였다. 또한, 다중반송파 시스템에 역상관 검출기(decorrelating detector)를 결합한 다중반송파/다중사용자/다중경로 결합 검출 방식을 제시하고 성능 및 역상관 과정에 의한 백색가우시안 잡음(AWGN)의 증가를 분석하였다. 제안한 결합 검출 방식의 오류 확률은 사용자 한 명만이 존재하는 경우의 이상적인 성능에 근접하였다. In this paper, the bit error ratio(BER) performance of multi-carrier CDMA system in multi-user/multi-path environment is analytically derived, and effect of interferences due to multi-user, multi-carrier, multi-path is analyzed. A multi-carrier/multi-user/multi-path joint detection scheme incorporating a decorrelating detector is proposed, and its performance as well as the enhancement of noise due to decorrelating process are analyzed BER of the proposed joint detection scheme is only slightly degraded compared to the ideal case of single user environment.

한반도 동부회랑의 경쟁력 강화방안

한종길,하영석 한국해운물류학회 2003 해운물류:이론과실천 Vol.- No.6

본 연구는 물류 회랑 정비는 지역 경제권의 형성 및 발전의 전제 조건이며 동북 아시아 지역에서 환동해경제권이나 동북아 공동시장과 같은 지역 경제권의 형성을 위해서는 회랑 정비가 우선되어야 한다는 관점에서 접근하고 있다. 또, 동북아 물류중심국가 논의에 부응하는 실천 수단의 하나로써 동해항의 발전을 위해서는 한반도 동부 회량의 정비가 중요한 과제 중의 하나라는 점이 본 연구의 중요한 관점이다. 이를 위해 본 연구에서는 먼저 경제권 형성과 물류 회랑 논의에 대하여 선진 사례라고 할 수 있는 유럽의 사례를 개괄하고, 일본의 ERINA에서 제안한 동북아 물류 회랑의 개요를 고찰하였으며 마지막으로 동북아 물류 회랑과 한반도 동부 회랑의 경쟁력 강화를 위한 동해항과 강원도 역할에 대하여 제시하였다. 한반도 동부 회랑의 경쟁력 강화를 위해서는 첫째로 시급한 인프라 정비, 두 번째로 해상 부문 네트워크와의 접속, 셋째로 가격 경쟁력의 확보를 위한 노력이 필요하다. 이를 위해 강원도와 동해항은 ①개발회랑 개념으로 정부의 정책적 지원을 요구. ②한반도 동부 회랑 사업에 대한 지속적 정보 전달이 필요하다. This paper focused on how to strengthen the competitiveness of Korean East transportation corridor (Busan~Donghae~Rajin Khasan~Ussuriysk~SLB) compare to nine transportation corridors in northeast Asia. Development of transportation corridor is one of the key issues for mutual cooperation and collaboration in the Northeast Asian Region. In order to increase the competitiveness of Korean East transportation corridor, we propose following 3 issues. 1) Develop key infrastructure urgently. 2) connecting network with ocean transport. 3) obtaining price competitiveness compare to other corridors. The roles of the local government in promoting development are 1) to obtain cooperation and financial assistance from national government with concept of development corridor. 2) to provide most up-to-date information about corridor to cargo owner, etc., for realizing the transportation routes in a practical way.