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.

불확실성을 가지는 비선형 시간지연 시스템에 대한 견실제어

정은태,권성하 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

This paper presents a design method of robust control for T-S fuzzy systems with time delay and uncertainties. Based on parallel distributed compensation (PDC), a delay-dependent control is utilized. An appropriate Lyapunov-Krasovskii functional is chosen for delay-dependent stability analysis. A sufficient condition for delay-dependent control is represented in terms of linear matrix inequalities (LMIs).

아크릴아미드 고정 구멍갈파래에 의한 중금속 Cd(Ⅱ), Pb(Ⅱ) 이온의 흡착특성 (Ⅰ)-Column법

박광하,권영두,정영진,장은경 한국공업화학회 2004 공업화학 Vol.15 No.1

본 연구에서는 동해안 해조류인 구멍갈파래를 아크릴아미드에 고정하여, Cd(Ⅱ) 및 Pb(Ⅱ) 중금속 이온의 흡착 특성을 살펴보았다. 수순한 Ulva pertusa 및 Si-Ulva pertusa 흡착제보다는 아크릴아미드에 고정화된 Ulva pertusa의 경우 많은 양의 중금속이 흡착되었으며, Pb(Ⅱ) 이온이 Cu(Ⅱ) 이온보다 더 잘 흡착되는 것으로 나타났다. 흡착제의 농도가 작은 경우 중금속 이온의 흡착량은 pH에 큰 영향이 없었으나, 흡착제의 농도가 클 경우 중금속 이온의 흡착량은 pH에 큰 영향을 받았다. pH에 따른 중금속 이온의 흡착량은 pH 10.5 > 8.5 > 7.0 > 5.5 > 3.5 순으로 나타났다. 아크릴아미드에 고정화된 Ulva pertusa의 단위 질량에 대해 Cd(Ⅱ) 및 Pb(Ⅱ) 이온의 최대 흡착량은 각각 최대 8.73 ㎎과 13.20 ㎎으로 나타났다. 또한 Cd(Ⅱ) 및 Pb(Ⅱ) 이온의 회수율은 pH에 따라 다소 차이가 있었으나, 각각 61.3~75.5% 및 61.4~54.1%로 나타났다. 중금속 이온의 회수에 있어서 산성 조건이 알칼리성 조건보다 효율적이었으며, 본 실험에 의한 중금속 이온의 흡착 특성은 Freundlich 흡착 특성과 잘 일치하는 것으로 나타났다. Adsoprtion characteristics of Cd(II) and Pb(II: heavy metal ions onto the Acrylamide-immobilized Ulva pertusa, and algae of the eastern coastal area. was examined in this work. Much amounts of heavy metal ions were adsorbed onto the Acrylamide-immobilized than either bare Ulva pertusa or Si-Ulva pertusa. It was also observed that Pb(II) was more readily adsorbed on the algae that Cu(II). The adsorption amounts of heavy metal ions showed no great dependence on the pH value at low adsorbent concentration, but those were high dependent on pH value at high adsorbent concentration. The adsorption amounts of heavy metal ions were in the following order; pH 10.5 > 8.5 > 7.0 > 5.5 > 3.5. The maximum adsorption amounts of Cd(II) and PB(II) onto Ig of Acrylamide-immobilized Ulva pertusa were 8.73 mg and 13.20 mg, respectively. It was found that recovery yields of Cd(II) and Pb(II) ions were in the range of 61.3∼75.5% and 61.4∼54.1% depending on the pH level. In the heavy metal recovery, acidic condition was more efficient that alkaline condition. The adsorption behavior of these heavy metal ions was well matched with the Freundlich adsorption isotherm.

난화를 이용한 자극제시 방법이 정신지체아의 언휘력 증가에 미치는 효과

장은정,권도하 한국언어치료학회 1997 言語治療硏究 Vol.6 No.1

The purpose of this study is to know the effects of two teaching methods using scribble with picture card and picture card only to increase vocabularies in the mentally retarded children. The subjects were four mentally retarded children who were between seven and eleven in chronological age. Each child was experimented with the two word lists using picture card and picture card with scribble. Scribble was used with the words spoken by the teacher. At that time the picture card of target word was presented. The results are as follows. 1. There was no difference in the mean time required for acquiring a single word between the two teaching methods. 2. The child who is the lowest IQ is the best learner with the scribble with picture card method than the rests of the subjects. 3. Even though there was no difference in the mean time in the two methods, the scribble with picture card method seems better than the card only in the respects of developing the learning attitudes. 4. The effects of improving and maintaining articulation observed in scribble plus picture method.

황사 기간 동안에 어린이, 성인, 노인에서의 자각증상과 예방행동에 대한 조사연구

이보은,하은희,박혜숙,권지숙,신경림 韓國學校保健學會 2005 韓國學校保健學會誌 Vol.18 No.1

Purpose: Recently there are scientific evidences for the health effects of Asian dust-storms. Particularly in 2002, the daily average of PM_(10) exceeded 600 and 700 ㎍/㎥ in March and April respectively. We examined the effects of Asian dust-storms on perceived symptoms and preventive behaviors among children, adults, and elders. Method: The subjects of this study were 425 children, 444 adults and 60 elders. A questionnaire survey was carried out on the children and the adults by teachers and on the elders by interviewers to obtain information on demographic variables, perceived symptoms and preventive behaviors, previous respiratory disease, environmental tobacco smoke, and proximity between the house and the road during Asian dust-storms. We analyzed using descriptive statistics, X_(2) test and multiple logistic regression models. After adjustment for potential confounders, we estimated the odds ratios and 95% confidence intervals of the children and the elders for perceived symptoms and preventive behaviors. Result: The elders had a significantly higher prevalence of respiratory symptoms than the other groups. The children had a significantly higher prevalence than the adults in getting URI (1.51), coughing (1.68), rhinorrhea (1.46), fever (2.39) and medication for allergy or asthma (1.90). The children had better behaviors than the elders in closing windows (3.57), taking less outdoor recreational activity (2.59) and staying home (2.60).

빠른 매핑(fast mapping) 프로그램이 정신지체아동의 언어능력에 미치는 영향

유은미,권도하 대구대학교 특수교육재활과학연구소 2006 再活科學硏究 Vol.24 No.1

This study is done to find out if the program is effective on improvement of learning new nouns, verbs. and adjectives on metal retarded children with limited ability of words, as well as effective on development of semantic relation and on improvement lexical diversity that children take in. The participants for this study are three children with developmental years of 3 to 4 and IQ of 50 to 70. This study is examined by Ab Design which contains 3 main processes; 1) Pre-test Stage, 2) Treatment Stage, 3) Post-test Stage. The program is designed to examine the preparatory stage to select target words and treatment stage contains 3 main precesses such as word exposure stage, word comprehensive stage, word expressive stage. The results for the study are shown as below.; First, all participated children under the study have improved their ability to learn new vocabularies. Especially, ti has been more effective on comprehensive ability of vocabulary than expressive ability of vocabulary. Second, all participants have positive changes in semantic relation. Third, all participated children under the study have improved their TTR As on can see results above, the fast mapping program is certainly effective on improving linguistic competence of the mental retarded children. 본 연구는 빠른 매핑 프로그램을 이용한 중재가 낱말 능력에 제한을 보이는 정신지체아동의 명사와 동사, 그리고 형용사의 어휘력 증가에 영향을 미치는지, 또한 이렇게 습득된 명사와 동사, 그리고 형용사가 의미 관계의 출현빈도와 어휘다양도(Type-Token Ratio)의 증가에 영향을 미치는지에 대해 알아보고자 하였다. 언어 연령이 3~4세이고 지능지수가 50~75인 아동 3명이 이 연구에 참여하였다. 이 연구는 사전평가단계(pre-test stage), 치료 단계(treatment stage), 사후 평가 단계(post-test stage)를 가진 Ab design으로 설계되었으며, 프로그램의 구성은 목표 어휘 선정을 위한 준비 단계와 어휘 노출 단계(word exposure stage), 어휘 이해 단계, 어휘 산출 단계의 치료 단계로 이루어져 있다. 본 연구의 결과는 다음과 같다. 첫째, 대상 아동 모두 어휘력이 증가하였다. 특히, 산출 어휘력보다는 이해 어휘력에서 더욱 큰 효과를 나타내었다. 둘째, 대상 아동 모두 의미관계에서 긍정적인 변화를 나타내었다. 아동들은 모두 치료 전 많이 사용하던 의미관계의 단계가 전체 발화 수에서 차지하는 비율이 줄어드는 대신, 그 보다 높은 의미관계의 단계가 전체 발화 수에서 차지하는 비율이 증가하였다. 셋째, 대상 아동 모두 어휘다양도가 증가하였다. 이상의 결과를 살펴보았을 때, 빠른 매핑 프로그램이 정신지체아동의 언어능력에 영향을 미쳤다.

시간지연 시스템에 대한 출력궤한 H∞ 제어

정은태,김성미,권성하 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-

This paper presents an H∞controller design method for linear time-invariant systems with delayed state and control. Using the second method of Lyapunov, the stability for delayed systems is discussed. For delayed systems, we derive a sufficient condition of the bounded real lemma(BRL)which is similar to BRL for nondelayed systems. And the sufficient conditions for the existence of an output feedback H∞controller of any order are given in terms of three linear matrix inequalities(LMIs). Futhermore, we briefly explain how to construct such controllers from the positive definite solutions of their LMIs and give a simple example to illustrate the validity of the proposed design procedure.

전체 고유치구조 배치에 의한 HEADBOX의 최적제어기에 관한 연구

정은태,정맹화,권성하 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-

A computationally simple sequential algorithm for headbox optimal controller is presented. The approach is capable of systematically calculating a set of appropriate weighting matrices for the quadratic performance index, so that the resulting optimal control law would not only minimize the index, but also place the eigenspectrum of the closed-loop system at some predefined location.

개선된 등가 T-S 퍼지 모델 구성 방법

민형기,권성하,정은태 국립7개대학공동논문집간행위원회 2003 공업기술연구 Vol.3 No.-

This paper presents an improved method that constructs an equivalent T-S fuzzy model for nonlinear systems expressed by nonlinear differential equations including terms of power series. The proposed method has fewer numbers of the rules than the previous methods as well as exactly expresses nonlinear systems. Moreover, this method can get wider feasible area satisfying the stability conditions than the previous methods. We show the improvement of modeling by comparing the proposed method with two previous methods through an inverted pendulum on a cart.

丹參飮 煎湯液이 心筋細胞 搏動數에 미치는 影響

손창식,권강범,김상범,이호승,서은아,이호섭,류도곤 대한동의병리학회 2001 동의생리병리학회지 Vol.15 No.2

In order to elucidate toxic mechanism of myocardial damage and protective effect of herbal extract, Dansamyeum (丹參飮) against cytotoxic effect of xanthine oxidase/hypoxanthine(XO/HX) and cardioprotective effect of Dansamyeum (丹參飮) were examined by MTT assay and heart beating rate after cultured myocardial cells derived from neonatal mouse were treated with various concentrations of XO/HX, a free radical. The results of these experiments were fellows : XO/HX, a oxygen radical, decreased the survial rate on MTT assay in cultured myocardial cells. Dansmyeum(丹參欲) water extract have efficacy of increasing heart beating rate decreased by XO/HX in cultured myocardial cells. Radix Salviae Miltiorrhizae and Lignum Santali Album water extract have efficacy of increasing heart beating rate decreased by XO/HX in cultured myocardial cells. From above the results, it is suggested that XO/HX showed toxic effect in cultured myocardial cell derived from neonatal mouse and herbal extract such as Dansamyeum(丹參飮) is very effective in the prevetion of XO/HX cardiotoxicity. Key ward : Dansamyeum(丹參飮), Xanthine Oxidase/Hypoxanthine(XO/HX), myocardial Cell, Radix Salviae Miltiorrhizae, Lignum Santali Album, MTT, beating rate