HA 라우팅 기반의 개선된 멀티캐스트 제공 방안

김인경(In-Kyeong Kim),하정락(Jeong-Lak Ha),현은희(Eun-Hee Hyun),김상하(Sang-Ha Kim) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.2Ⅲ

IETF Mobile IP는 이동 컴퓨팅 환경에서 IP 멀티캐스트를 지원하기 위한 메커니즘으로 HA 기반 라우팅과 FA 기반 라우팅을 간략히 언급하고 있다. FA 기반 라우팅의 경우, 단말기 이동 시 멀티캐스트 트리를 재구성하는 오버헤드가 존재하는 단점이 있다. 반연, HA 기반 라우팅의 경우, 단말기 이동시 경로 최적화가 이루어지지 않는 단점에도 불구하고, 멀티캐스트 트리 수정에 대한 오버헤드가 존재하지 않은 장점이 있다. 이러한 장점은 망의 안정성을 높일 수 있기 때문에 많은 연구에서 HA 기반 라우팅을 채택하고 있다. 하지만, 기존의 HA 기반 라우팅 방법에서 가장 큰 장애 요소는 터널링 집중화 현상이며, 이를 해결하기 위해 Mobile Multicast(MOM) 등에서 정성적인 방법을 제안하고 있지만, 구체적인 프로토콜이 없으며 모든 HA들이 관여하는 복잡도로 인해 실제로 망에 배치되는 데 한계성을 가진다. 본 논문에서는 현재의 Mobile IP 메시지의 간단한 확장과 FA에 멀티캐스팅을 위한 기능을 첨가하여, 터널링 집중화 현상을 해결하는 프로토콜을 제안하고자 한다. 제안되는 프로토콜은 현재의 모든 IP 멀티캐스트를 수용하고, Mobile IP와의 호환성을 유지한다.

이동 환경에서 멀티캐스트 적용 방안

홍형섭(Hyung-Seop Hong),하정락(Jeoung-Lak Ha),현은희(Eun-Hee Hyun),김상하(Sang-Ha Kim) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.2Ⅲ

Mobile IP(MIP)[1] Working Group에서 제안하고 있는 멀티캐스트 적용 방안에는 크게 HA기반 라우팅과 FA기반 라우팅으로 구분된다. HA기반 라우팅 방법은 멀티캐스트 패킷을 HA에서 터널링하는 방법을 사용하므로 경로의 최적화가 이루어지지 않게 되며 터널 집중화 현상이 발생하게 된다. FA기반 라우팅 방법은 이동 호스트의 핸드오프가 일어날 때마다 멀티캐스트 트리의 재구성이 필요하므로 많은 오버헤드가 발생하지만 경로 최적화는 얻을 수 있다. 본 논문은 HA기반 라우팅과 FA기반 라우팅 방안을 절충한 새로운 멀티캐스트 제공 방안을 제안한다. MH의 이동이 빈번한 마이크로 레벨에서는 HA기반 라우팅을 이용하고, MH의 이동 거리가 큰 매크로 레벨에서는 경로 최적화를 위하여 새로운 멀티캐스트 트리를 재구성함으로써 보다 효율적 멀티캐스트 서비스가 가능한 메커니즘의 프로토타입을 제안한다.

Interaction between Brain-Derived Neurotrophic Factor Val66Met Polymorphism and Recent Negative Stressor in Harm Avoidance

Kim, Seog Ju,Cho, Seong-Jin,Jang, Ha Min,Shin, Jonghan,Park, Pil-Whan,Lee, Yu Jin,Cho, In Hee,Choi, Jung-Eun,Lee, Heon-Jeong S. Karger AG 2009 Neuropsychobiology Vol.61 No.1

<P>There have been controversial results regarding the association between brain-derived neurotrophic factor (BDNF) Val66Met polymorphism and anxiety-related traits such as harm avoidance (HA). We aimed to investigate the interaction between <I>BDNF</I> Val66Met polymorphism and negative life stressors in HA. <I>BDNF</I> Val66Met polymorphism was genotyped in 391 community-dwelling Koreans (152 males, 239 females; 43.2 ± 14.1 years old). The Temperament and Character Inventory (TCI) and the Center for Epidemiological Studies for Depression Scale (CES-D) were self applied. The Structured Clinical Interview for DSM-IV axis I disorders and face-to-face interviews investigating negative life stressors within the last 6 months were also performed. There was no significant difference in TCI score, major depressive disorder prevalence and CES-D score among the 3 genotypes (94 Met/Met, 188 Val/Met and 109 Val/Val subjects). There was no significant difference in TCI scores between subjects with stressors and those without stressors, while more common major depressive episodes (p = 0.03) and higher CES-D scores (p < 0.001) were found in subjects with stressors. However, there was a significant interaction between the <I>BDNF</I> genotype and negative life stressors in HA (p = 0.02). Only subjects with the Val/Val genotype showed higher HA with recent negative stressors. Our finding suggests that <I>BDNF</I> Val66Met polymorphism might influence HA by interacting with recent negative stress experience.</P><P>Copyright © 2009 S. Karger AG, Basel</P>

우리 나라 보건관리대행서비스 평가 연구

하은희,조수헌,김선민,주영수,한상환,하미나,권호장,홍윤철,김창엽 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.1

Group occupational health service programme started in 1990 is one of the measures to cope with limited human and financial resources in occupational health. The programme has expanded rapidly to include 52 institutions, private as well as public, all over the country. In spite of its potential impact on health of employees and practice of occupational health in small and medium sized industries, comprehensive evaluation in terms of quality has not been tried. This study has aims to develop the criteria to assess the quality of newly developed group occupational health service programme, and to investigate the quality of institutions, and finally to develop policies for the quality improvement. 1) Criteria development : By defining occupational health services, in particular for small and medium sized industries, as one of the primary health care, followings are included as core elements of qualitative occupational health programme; accessibility, continuity, comprehensiveness, technical quality, intersectoral collaboration, emphasis on preventive services, community participation, and adequacy. Again each element is divided into five major components of national health system infrastructure developed by the World Health Organization; development of health resources, organized arrangement of resources, delivery of health care, economic support, and management. In turn, each component is categorized into three aspects of quality assessment, structure, process and outcome. Expert panel selected several criteria for each category to evaluate the programme. Criteria were modified according to each group of interviewees, to produce two sets of questionnaire, one for chief operating officer and another for nurses in the institutions, and the chief operating officer and workers in the workplace. 2) Subject : Of all 52 institutions, 25 voluntarily participated in the survey. At individual institution, chief operating officer and practicing nurses were interviewed in depth. After intensive education for interviewees, every interviewees, every interview was performed with standardized guideline and questionnaire. The quality of the 'Group occupational health service programme' was found to be lower than expected. Especially in continuity, comprehensiveness, technical quality, community participation and adequacy, lower quality in structural aspect was commonly identified throughout all the institutions,. Quality in terms of accessibility and continuity highly varied among institutions., To improve quality of the programme, more comprehensive and systematic programme such as accreditation has to be introduced. In addition, human resources, governmental fund and information systems for individual workers are to be developed. As a long range plan, integration of occupational health services into the national health systems and pooling of financial resources and planned allocation should be considered.

건강증진학교 모형개발 : Based on Health Center of University 대형 보건소 활동을 중심으로

하은희,조희숙,윤영옥,강명근 韓國學校保健學會 2001 韓國學校保健學會誌 Vol.14 No.1

Objectives: The purpose of this study is to develop a health-promoting program centered on the university-health center and to provide a developed program for students and faculties. Methods: A survey was conducted of 719 female students and 238 faculties concerning their health-promoting programs. Based on the results of the survey, we developed programs that could be applied to students and faculties. After operating the programs, we developed further models by evaluating the effectiveness and satisfaction. Conclusions: We selected a comprehensive health-promoting program that included weight control, preventive inoculation, sex education and control of disease based on repsective needs. We also applied programs developed through collaboration with other departments from September 1998 to August, 1999. Users of the preventive inoculation-program increased by one point five during the year. Also, participants were generally satisfied with the weight control program and succeeded in reducing weight We hope that we can set up this program and expand it by developing various other projects in Korea. Key Words: Modeling, Health-Promoting School, Health Center of University

보건관리자 직무평가도구의 개발

하은희,박혜숙,김영주 이화여자대학교 의과대학 2003 EMJ (Ewha medical journal) Vol.26 No.2

Objectives : The purpose of this study is to deliver effective worksite health management by specifying job of occupational physician, occupational nurse, occupational hygienist and making job reference manual and health performance audit. Therefore, We can contribute to disease prevention and health promotion of workers by enhancing quality of worksite health management. Method : The methodology of making performance audit is comprised of developing audit questions and weighting the questions. Measures are made by scoring the values. The question-naires were grouped by the categories and sections. This occupational audit was distributed to the health personnel of 350 workplaces by mail. The self-administered results were returned and analyzed, Results : We plot the field of occupational health service by basic policy, preventive health service, health care, administration, and other services. We gave the weight A on the primary job, B on the supplementary job, and C on the minor job. This weight was made through the delphi procedures where 30 specialists joined. Basic policy got score of 16.1% preventive health service got 36.5%, health care 20.4%, administration 10.9%, and other services 10.1%. Further weightings on the questionnaire sections were made through the survey on specialists and final weighting on each questionnaire was made by making formula considering weights of each stage. The audit was composed of 96 questions which has dichotomos scales and full score was 1,000. Person-nels from 80 workplaces (23%) replied the audit and the scores of physicians, nurses, and hygienists were 608.6, 587.1 and 535.4, respectively, all a little higher than 500. Discussion : The health performance audit can be used by the sorksite health personnels providing health service. However, this work would not be complete without further comprehe-sion and application in the real settings. 목적: 본 연구에서는 사업장 보건과리를 활성화하기 위하여 사업장에서 수행되고 있는 산업보건관리직무를 객관적으로 평가할 수 잇는 사업장 보건관리직무 평가항목과 평가척도를 개발하고자 하였다. 방법: 평가항목은 산업보건서비스의 내용별로 대항목, 소항목, 세부항목으로 구분하였다. 평가도구의 타당성을 검증하고 실제 사업장에서의 직무활동을 평가하여 평가의 기준을 현실에 맞게 설정하고자 위의 과정을 거쳐 만들어진 평가도구를 350개 사업장의 보건관리자에게 설문조사를 통해 적용하였다. 연구대상자는 산업간호사와 산업위생관리기사의 경우 한국산업안전공단 안전교육원에서 실시하는 보수교육자 이수자명단을 이용하였으며 설문실시기간은 1996년 7월 24일부터 8월 24일가지로 하여 우편설문의 형식을 취하였다. 결과: 1차 설문조사결과 산업보건의사, 산업간호사, 산업위생관리기사의 평균점수를 보면 기본방침 14.5%, 예방보건 서비스 39.0%, 치료서비스 18.0%, 관리 및 행정서비스 17.2%, 기타서비스 10.3%로 예방보건서비스가 가장 높은 점수를 보였다. 이 결과를 다시 1차 설문에 응하여준 응답자에게 통보하고 2차 Delphi를 시행한 결과 기본방침 16.1%, 예방보건서비스 36.5%, 치료서비스 20.4%, 관리 및 행정서비스 16.9%, 기타서비스 10.1%로 예방보건 서비스의 점수는 다소 낮아지고 기본방침과 치료서비스의 점수가 올라가는 결과를 보여주었다. 산업보건학계, 대행기관, 사업장 실무 인력인 산업보건의사 10인, 산업간호사 10인, 산업위생관리기사 10인을 대상으로 한 설문조사를 통해 대항목 각각을 100%로 하였을 때의 소항목의 점수(백분율)를 구하였다. 기본방침 중에서는 기본방침의 설정이 가장 높은 점수를 보였으며 예방보건서비스중에서는 건강상담 및 보건교육이 가장 높은 점수를 보였다. 치료서비스 중에서는 환자치료가 관리 및 행정 서비스에서는 기록 및 보고가 높은 점수를 보였다. 우편설문을 보낸 350개 사업장중 85개 사업장, 110명의 보건관리자에서 직무평가설문에 응답하였으며 응답사업장 보건관리자들의 직종별 인원수는 의사 41명, 간호사 78명, 산업위생관리기사 24명, 환경관리기사 65명, 기타 2명으로 산업위생관리기사 대신 환경관리기사를 채용한 사업장이 많았다. 응답사업장의 업종은 대부분이 제조업이었으나 매우 다양하였고 규모별로는 300인 미만이 38.5%, 300~999인 사업장이 32.5%, 1000인 이상이 28.8%었다. 결론: 본 평가도구가 개발목적에 부합되기 위해서는 사업장에 실제로 적용하여 사업장에서 실제 사용해 보고 이 결과를 바탕으로 사업장 규모별, 업종별로 내용을 분석하여 직무를 평가함으로써 문제를 파악하고 특히 보건관리 인력을 얼마만큼 투입할 것인가를 결정할 때에 반영되어야 할 것이다. 그리고 보건관리자의 직무 즉, 사업장내 산업보건서비스를 올바로 수행하기 위한 보건관리자의 교육훈련제도지에 대한 정책이 마련되어야 할 것이다.

C.V.D. 방법에 의한 Cd_0.78Zn_0.22 S박막 성장과 광전기적 특성연구

유상하,이상렬,홍광준,서상석,김혜숙,전승룡,윤은희,문종대 조선대학교 기초과학연구소 1993 自然科學硏究 Vol.16 No.1

We had grown Cd_0.78Zn_0.22S polycrystal thin films on slide substrate using chemical vapour deposition(CVD) method. We measured X-ray diffraction patterns in order to study Cd_0.78Zn_0.22S polycrystal structure. We studied its band gap using transmission curves and photocurrent and also analyzed photoluminescence using configurational coordinate model. We measured Hall effect·on this sample by Van der Pauw method and studied on carrier density and mobility depending on temperature.

컴퓨터-소프트웨어 분야 수요지향적 교과과정의 개발

노은하,박수희,장준호 한국컴퓨터교육학회 2005 컴퓨터교육학회 논문지 Vol.8 No.4

아연 결정유에 관한 연구

김은희,이병하 明知大學校 産業技術硏究所 2005 産業技術硏究所論文集 Vol.24 No.-

To develop willemite crystalline glaze which is useful to table ware, the additives and firing conditions were detected and it’ s glaze formula was fixed. Willemite crystalline glaze was formulated by adding potassium feldspar instead of sodium at the firing temperature up to 1250°C, and in this case the frit was not included in this glaze formula.

농업부산물의 재활용을 위한 Vermistabilization에 관한 연구

김은호,하상영,손희정 東亞大學校生命資源科學大學附設 農業資源硏究所 1997 農業生命資援硏究 Vol.6 No.1

The objective of this study was to investigate the effect of bulking agents including cow manure, saw dust and rice straw in the ripening of leather sludge for vermistabilization. The changes of the waste properties for ripening time for 50 days were observed according to the various mixture ratios of leather sludge and bulking agents. The pH values of the mixture wastes were decreased from 7.5~8.5 to 6.4~7.3 with the ripening time for 50 days, and it was indifferent of the mixture ratio and type of the bulking agent. The initial value of oxidation-reduction potential(Eh) of the mixture waste was a negative(-)value indicating an unfavorable condition for earthworm life, but the values of Eh were increased with the ripening time. The increase rate of Eh value was proportional to the mixture ratio of bulking agents, but the increase rate for saw dust was higher than that of the cow manure and the rice straw. The value of alkalinity was also changed into the favorable range for earthworm after 50days except for 9:1 of the mixture ratio of leather sludge and bulking agents. When the mixture ratios of leather sludge to the bulking agents were increased from 6:4 to 9:1, the growth characteristics of earthworms were decreased from 95% to 31.7% for the survival rate, 225% to 103% for the liveweight increase rate. It can be concluded that the proper content of the bulking agents in the leather sludge to ensure effective vermistabilization was over 30%, when the mixture was ripened during 50 days.