직업성 연중독의 Screening Test로서 Erythrocyte Protoporphyrin량과 연중독지수간의 상관에 관한 연구

김광종 대한보건협회 1985 대한보건연구 Vol.11 No.1

Aiming to determine an availability of the erythrocyte protoporphyrin level as a biological parameter for early diagnosis and detection in the precision physical examination for lead poisoning in lead workers, the following study was carried out during May 1 through Sep. 30, 1984. The determination of erythrocyte protoporphyrin level, blood lead, urine delta-aminolevulinic acid, urine coproporphyrin, hemoglobin, hamatocrit in lead workers were examined for 16 battery workers, 92 lead smelters, 68 lead solders and 47 printing workers. Supplementary, the determination of erythrocyte protoporphyrin level was examined for 109 health male adults and 42 Ni & Cr plating workers who had not occupational exposed to lead and its compounds. Lead concentration in working environment was also measured for finding out lead and its compounds. The distribution of erythrocyte protoporphyrin level in healthy male adults was analysed with lognormal probability paper test for setting of normal values in the screening test. The obtained data from the lead workers was examined by simple regression analysis and stepwise multiple regression analysis in order to finding out the relationship between erythrocyte protoporphyrin level and blood lead, urine delta-aminolevulinic acid, urine coproporphyrin, hemoglobin, hematocrit. The results were obtained as follows: 1. In healthy male adults who had not occupational exposed to lead, the distribution of erythrocyte protoporphyrin level showed to be log normal. Arithmatic mean and standard deviation was 35.1±10.8㎍/dl with geometric mean 33.6㎍/dl. 2. When values of erythrocyte protoporphyrin level showed 84.6±52.3㎍/dl in lead workers which was significantly higher than the healthy male adults on one hand and on the other, mean values of erythrocyte protoporphyrin level showed 33.1±13.2㎍/dl in Ni & Cr plating workers which was significantly lower than the lead workers. 3. It was shown in the study that the higher lead concentration of working environment, the higher the erythrocyte protoporphyrin level of lead workers, and also the higher correlation coefficients between erythrocyte protoporphyrin and blood lead, urine delta aminolevulinic acid, urine coproporphyrine, hemoglobin and hematocrit. 4. The correlation coefficient between erythrocyte protoporphyrin and blood lead showed r=0.64, therefore with blood lead only as an independent variable (blood lead), erythrocyte protoporphyrin level may be easily predicted as the predicted variable. 5. In dose-effect relationship between blood lead and erythrocyte protoporphyrin, urine delta-aminolevulinic acid, urine coproporphyrin for lead workers, the value of erythrocyte protoporphyrin began to increase at 30 to 35㎍/dl of blood lead. Compared with erythrocyte protoporphyrin, delayed onset of increase in urine delta-aminolevulinic acid and urine coproporphyrin were observed. In short, it was recommended that the measurement of erythrocyte protoporphyrin was available as a biological indicator of screening test for detection of early effect of lead and its compounds in lead workers, and it was also suggested that the screening level of erythrocyte protoporphyrin between 100 and 120㎍/dl was able to apply in detection for lead posioning.

네트워크 소요시간 최소화를 위한 이동 에이전트의 멀티캐스트 이주 모델 구현

김광종,고현,김영자,이연식,Kim Kwang-jong,Ko Hyun,Kim Young Ja,Lee Yon-sik 한국정보처리학회 2005 정보처리학회논문지D Vol.12 No.2

The mobile agent has very various performance according to the element of communication number of times between hosts, quantity of transmission data agent's size, network state etc. specially, migration method is caused much effect in whole performance of distributed system. Most existing migration methods have simplicity structure that it moves doing to accumulate continuously result after achieving task by visiting host in the fixed order. Therefore, in case there are situation such as fault, obstacle, and service absence etc. This can be inefficient due to mobile agent increased network required time. In this paper, we design and implementation Multicast Migration Model for minimizing network required time by solving this problems. Multicast Migration Model includes components such as mobile agent including call module and naming agent, which provides object replication information and distributed server's location transparence. And we evaluate and compare with existing migration method applying prototype system to verify implemented migration model. 이동 에이전트는 호스트 간의 통신 횟수, 전송 데이터의 양, 에이전트의 크기, 네트워크 상태 등의 요소에 따라 매우 다양한 성능을 보이며 특히, 이주 방식은 분산 시스템의 전체 성능에 큰 영향을 준다. 대부분의 기존 이주 방식은 고정된 순서대로 호스트를 방문하고 방문한 호스트에서 작업을 수행한 후, 결과를 계속 누적시키면서 이주하는 단순 구조를 가지고 있다. 그러므로 호스트의 결점 및 장애, 서비스 부재 등과 같은 상황이나 방문해야할 호스트의 수가 많을 경우, 네트워크 소요시간이 증가되어 이동 에이전트를 사용하는 것 자체가 비효율적일 수 있다. 따라서 본 논문에서는 이러한 문제들을 해결하여 네트워크 소요시간을 최소화하기 위한 멀티캐스트 이주 모델을 설계 및 구현한다. 멀티캐스트 이주 모델은 분산된 서버의 위치 투명성 및 에이전트 객체 복제 정보를 제공하는 네이밍 에이전트와 호출 모듈만을 포함한 이동 에이전트 등과 같은 요소를 포함한다. 그리고 구현된 이주 모델을 검증하기 위해 프로토타입 시스템에 적용하여 기존 이주 방식과 비교 평가한다.

네이밍 에이전트의 메타데이터를 이용한 멀티 에이전트의 협력 및 노드 이주 기법

김광종,이연식,Kim, Kwang-Jong,Lee, Yon-Sik 한국정보처리학회 2004 정보처리학회논문지D Vol.11 No.1

In this paper, we propose a collaboration method of diverse agents each others in multi-agent model and describe a node migration algorithm of Mobile-Agent (MA) using by the metadata of Naming-Agent (NA). Collaboration work of multi-agent assures stability of agent system and provides reliability of information retrieval on the distributed environment. NA, an important part of multi-agent, identifies each agents and series the unique name of each agents, and each agent references the specified object using by its name. Also, NA integrates and manages naming service by agents classification such as Client-Push-Agent (CPA), Server-Push-Agent (SPA), and System-Monitoring-Agent (SMA) based on its characteristic. And, NA provides the location list of mobile nodes to specified MA. Therefore, when MA does move through the nodes, it is needed to improve the efficiency of node migration by specified priority according to hit_count, hit_ratio, node processing and network traffic time. Therefore, in this paper, for the integrated naming service, we design Naming Agent and show the structure of metadata which constructed with fields such as hit_count, hit_ratio, total_count of documents, and so on. And, this paper presents the flow of creation and updating of metadata and the method of node migration with hit_count through the collaboration of multi-agent. 본 논문에서는 멀티 에이전트 모델에서 각 에이전트의 협력 방법을 제안하고 네이밍 에이전트의 메타데이터를 이용한 MA(Mobile Agent)의 노드 이주 알고리즘을 제시한다. 멀티 에이전트의 협력은 에이전트 시스템의 안정성과 분산 환경에서의 정보 검색의 신뢰성을 향상시킨다. 이러한 멀티 에이전트의 중요한 구성 요소 중, 네이밍 에이전트는 상호 에이전트를 식별하고 특정 객체를 참조하도록 에이전트 이름을 지원하며, 각 에이전트는 이러한 고유의 이름으로서 특정 객체를 참조한다. 또한 네이밍 에이전트는 에이전트 특성에 따라 SPA(Server Push Agent), CPA(Client Push Agent) 및 SPA(Server Push Agent) 등으로 각 에이전트를 분류하여 네이밍 서비스를 통합하고 관리하는 역할을 수행하며, 특정 MA에 노드 이주 정보를 제공하게 된다. 그러므로 MA의 노드 이주 시 적중 문건의 수, 적중률, 노드 처리 시간 및 네트워크 지연시간에 따른 우선순위를 부여하여 노드 이주의 효율성을 높일 수 있는 방안이 요구된다. 따라서 본 논문은 통합된 네이밍 서비스를 위한 네이밍 에이전트를 설계하고 적중 문건의 수, 적중률 및 탐색 문건의 수 등으로 구성된 메타데이터 구조를 보인 후, 멀티 에이전트의 협력을 통한 메타데이터의 생성과 갱신 및 적중 문건의 수에 따른 노드 이주 방법을 보인다.

저준위 방사성폐기물 함유 시멘트, 유리 고화체의 물리 화학적 내구성 평가

김광종,이규성,정찬우,서용칠 한국폐기물자원순환학회(구 한국폐기물학회) 2003 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2003 No.-

객체 복제를 통한 이동 에이전트의 병렬 이주 방식 설계

김광종,이연식,Kim, Kwang-Jong,Lee, Yon-Sik 한국정보처리학회 2004 정보처리학회논문지D Vol.11 No.2

대부분의 이동 에이전트는 순차적인 노드 이주 방식에 의하여 다수의 이동 에이전트 시스템들로 이주된다. 하지만, 이러한 이주방식에서는 호스트의 결점이나 장애 등과 같은 문제가 발생하였을 경우, 이동 에이전트가 무한 대기나 고아 상태에 빠지므로 노드들 사이의 네트워크 소요시간이 증가하기 때문에 실제 다른 분산 기술들을 사용한 것만큼의 기대효과를 얻기가 어렵다. 따라서 이러한 문제를 해결하기 위한 연구들이 진행되어 왔지만 대부분 수동적 라우팅 테이블을 기반으로 노드의 이주를 결정하거나 문제가 발생된 호스트를 선회하는 방법이므로 실제 전체적인 네트워크 소요시간을 감소시키기 위한 연구는 아직 미흡하다. 본 논문에서는 이동 에이전트가 이동 에이전트 시스템들로 이주시 네트워크 소요시간을 감소시키기 위하여 네이밍 에이전트의 메타-테이블에 등록된 구현 객체 정보를 기반으로 능동적 라우팅 테이블을 설계한다. 또한 사용자의 키워드에 대하여 메타-테이블에서 일치하는 객체 참조자의 정보와 수에 따라 다수의 에이전트 객체를 복제한다. 복제된 객체는 이동에이전트 시스템들로 병렬 이주되며, 최소의 네트워크 소요시간을 제공한다. Most mobile agents are migrated to many mobile agent systems by the sequential node migration method. However. in this case, if some problems such as host's fault or obstacle etc. happened, mobile agent falls infinity walt or orphan states. Therefore, it is difficult to get an expectation effect as use of other distribution technologies because the required time for networking between nodes increases. And so, many researches have been performed to solve this problems. However, most of methods decide node migration based on passive routing table or detour hosts which have some problems. Actually, the researches for reducing the total required time for networking are insufficient yet. In this paper, to reduce the required time for networking of mobile agent we design an active routing table based on the information of implemented objects which are registered in the meta-table of naming agent. And also, for user's keyword, we propose an replication model that replicates many agent object according to the information and number of object references corresponding to meta-table. Replicated objects are migrated to mobile agent systems in parallel and it provides minimized required time for networking.

유해물질분과 : 유리고화체의 화학적 내구성에 대한 조성의 영향에 관한 연구

김광종,이규성,정찬우,김인태,김준형,서용칠 한국폐기물자원순환학회(구 한국폐기물학회) 2003 한국폐기물자원순환학회 추계학술발표논문집 Vol.2003 No.-

우리나라 산업위생의 발전방향

김광종 한국기술사회 1999 技術士 Vol.32 No.3

사업장의 유해 작업환경 관리

김광종 대한간호협회 1992 대한간호 Vol.31 No.4

韓末 愛國啓夢運動의 時代的 背景

金光鍾 又石大學校 1982 論文集 Vol.4 No.-

Patriotism enlightenment campaign were initiated by intellectuals in the late Yi Dynasity when the invasion of the foreign powers were fatal. It was recognized Yi Dynasity was at the crisis of becoming a colony. For this idea was quite different from the modernization movement, it was much welcomed by the people(masses). Many of the intellectuals among the modernized citizens realized the importance of taking charge of the roles in campaign. They tried to encourage the people to recognize the real of the country's destiny. This atmosphere was highly elevated during the period 1905-1910. Backgrounds of patriotism enlightenment campaign are as follows: 1. The incidents of opening ports made the people take a task to defense the nation against the foreign powers and to work for the nation. 2. Kyewhapa (Enlightenment Group) that initiated the Modernization using foreign aids and Choksapa that rejected the inclusion of foreign powers to the Modernization Movement never got the sincere attention from the people(masses) 3, Tonghak Peasant Movement was failed by the foreign powers. But this movement enlightened the self-consciousness of the nation that the people is only the root and master of this country. 4. Through the Toklip Hyupoe Movement (Independence Group) the problem of human rights was presented and the people also became systemized in taking part in the movement. Just after the loss of the national right in 1905, this could be the basic influence to realize the importance of the Patriotism Enlightenment Campaigns.

납 취급근로자의 증상호소와 임상검사치간의 관련성에 관한 연구

김성봉,이은일,김광종 大韓産業醫學會 1990 대한직업환경의학회지 Vol.2 No.2

This research was conducted to determine the usefulness of reported symptoms for the diagnosis of lead poisoning for workers exposed to lead. A group of 147 male lead smelting workers were given special physical examinations from June to September of 1989. The examinations included the reporting of ailments (symptoms) by the workers, as well as analyses of their blood lead concentrations and urinary coproporphyrine and delta-aminolevulinic acid concentrations. The associations were analyzed between the biological exposure indices and the symptoms described by the workers. The results were as follows : 1. The only symptoms which were described more frequently by the lead workers compared to the control group were paresthesia of the extremities, myalgia, arthralgia, and insomnia. The frequency of other symptoms described were actually lower for the lead-exposed workers. 2. For those workers whose blood lead concentrations were above 60 ㎍/dl, only the increase in the frequencies of arthralgia and paresthesia of the extremities were statistically significant, compared to those workers whose blood lead concentrations were below 60 ㎍/dl. Also, arthralgia was the only symptom which increased in frequency in workers whose urinary coproporphyrine concentrations were above 100 ㎍/1; however, this increase was not statistically significant by urinary delta-aminolevulinic acid levels.