Zeolite X 촉매를 이용한 WO₃의 CO 환원-탄화반응

이동활,이종대,전진혁,박노국,류시옥,이태진 嶺南大學校 工業技術硏究所 2003 工業技術硏究所論文集 Vol.31 No.2

This study was performed to manufacture tungsten carbide from CO reduction- carburization of WO₃using zeolite-NaX catalyst. Zeolite-NaX catalyst could improve the reduction property of WO₃. Moreover, zeoite-HX and KX catalysts also improved the reduction property of WO₃. This improvement of reduction property leaded to the decrease of reaction temperature. The size of WC particle was 50∼60 nm at 650 ℃ for 10h. From these results, it is concluded that the various zeolite X catalysts could be used for the reduction-carburization of W0₃ as the catalysts.

위암과 식도암이 병발된 다발성 원발성 악성종양 1예

박사영,이나영,이효진,이선영,최진혁,이순남,심강섭,성순희,한운섭 梨花女子大學校 醫科大學 醫科學硏究所 1996 EMJ (Ewha medical journal) Vol.19 No.3

Multiple primary cancer means that more that two cancers occur independently in an individual. Recently, the incidence of multiple primary cancer has increased with lengthened survival, of cancer patients, development of new diagnostic technique and increased clinical evaluation. We report a patient who had adenocarcinoma of stomach combined with squamous cell carcinoma of esophagus simultaneously.

서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1994)

김재홍,안진균,정성재,김영태,김중환,김시영,이석종,이홍렬,서호석,김경훈,권혁진,정우권,고우석,이용석,안필수,오준규,오용섭 대한화학요법학회 1996 대한화학요법학회지 Vol.14 No.1

Background : In recent years gonorrhoea has been panendemic and remains one of the most common Sexually Transmitted Diseases in the world, especially in developing countries. Objective & Method : For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria Gonorrhoeae(PPNG), Ive have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results : In 1994, 168 strains of N. gonorrhoeae were isolated, among which 109 (64,9% ) were PPNG. Conclustion : Our results suggests that the prevalence of PPNG in Seoul is still increasing.

대전 장태산 자연휴양림의 관광특성에 관한 연구

이혁진 문화관광연구학회 2001 문화관광연구 Vol.3 No.2

The purpose of this study is to analyze the tourism characteristics of Mt. Jangtae recreational forest by examining its geographical environment, recreational facilities and tourists' behavioral patterns. Field work and questionnaires were administered after a review of literature. The major findings from the study shows: as a result of field survey, Mt. Jangtae, one of the most popular private forests in Korea, consists of a various recreational facilities; As for tourists' residential distributions, this area can be classified as Daejeon and Choongnam type; in the case of their travel behaviors, the most frequent response on visiting type was the one accompanied by family and friends; for means of transportation, a majority of respondents used their cars; for preferred seasons, the favorite one was summer. Next was spring, fall and winter; satisfaction with its tourism resources and facilities was generally high. Based on the findings, the following suggestions can be made; 1) the development and managemental plan of private forest such as Mt. Jangtae should be linked with not only individual income but also useful space for public welfare and outdoor recreation. Accordingly, the continuous establishment of internal recreational facilities to increase functions of forest recreation and owners' economic income are required: 2) in the case of the specialization of private forest, advertising strategies by various media need to be developed in order to be well-known. Reasonable management in order to harmonize environmental conservation and resource use should be considered.

PCA와 ANN을 이용한 VOC 측정기기 개발

이장훈,권혁구,박승호,김동진,홍철호 한국환경독성학회 2004 환경독성보건학회지 Vol.19 No.2

Air quality monitoring is a primary activity for industrial and social environment. The government identifies the pollutants that each industry must monitor. Especially, the VOCs(Volatile Organic Compounds), which are very harmful to human body and environment atmosphere, should be controlled under the government policy. However, the VOCs, which have not been confirmed in emission sources are very difficult to monitor. It is needed to develop the monitoring system that allow the continuous and in situ measurement of VOCs mixture in different environmental matrices. Gas chromatography and mass spectrometry are the most prevalent current techniques among those available for the analysis of VOCs. But, they need a large size analytical instrument, which costs a great deal for purchase and operation. In addition, it has some limitations for real time environmental monitoring such as location problems and slow processing time. Recently, several companies have commercialized a portable VOCs measurement systems, which cannot classify various kinds of VOCs but total quantities. We have developed a VOCs measurement system, which recognizes various kinds and quantities of VOCs, such as benzene, toluene, and xylene(BTX). Also, it can be used as a stand-alone type and/or fixed type in the vehicle with rack for real-time environmental monitoring.

우리나라 觀光圈의 類型區分에 關한 考察 : 首都圈응답자의 觀光地 滯在日數를 中心으로

이혁진 서울保健大學 1996 論文集 Vol.16 No.1

The purpose of this study is to classify types of Tourism Areas' in terms of the time-distance method. For this, the types of tourism area are set up by the 'Stay Period'. Literature review and questionnaire method have been used for the purpose. Respondents are centered on Seoul metropolitan area, capital circle. The major findings of this study are summarized as follows; First, As for the recognition about tourism area, the male respondents showed higher degree of recognition than the female ones. Younger respondents with higher educational background also displayed higher recognition. Second, As for the preference on tourism area, Ch'ungbu area is the most preferred one, and it is followed by Tongnam, Ch'ungch'oˇng, Seonam, and Cheju area. The stay period in each area is that Ch'ungbu is 1 day, Ch'ungch'oˇng is 1 night 2 days, Seonam is 2 nights 3 days and Tongnam and Cheju are 3 nights 4 days. Third, as far as 'Administrative Unit' concerns, the favorite district is Kyoˇnggi-do. Next is Kangwon, Kyoˇngbuk, Kyoˇngnam, Ch'ungnam, Choˇnnam, Cheju, Ch'ungbuk and Choˇnbuk. In regard to distribution by the stay period in them, 1 day's trip is preferred in Kyoˇnggi-do, 1 night 2 days' trip in Kangwon-do and Ch'ungchoˇngnambuk-do, 2 nights 3 days' trip in Kangwon-do and Kyoˇngsangnambuk-do and 3 nights 4 days' trip in Kyoˇngsangnambuk-do and Cheju-do. Fourth, tourism area types can be divided into 4 patterns on the basis of the stay period;'1 Day', '1 night', '2 nights' and '3 nights'. 1. '1 day' is composed of Seoul-neighborhood zone, Inch'oˇn-Coastal zone, and Ch'unchoˇn zone in Ch'ungbu area. 2. '1 night' is composed of Ch'ungch ng area and a part of Ch'ungbu area. 3. '2 nights' is composed of Tongnam and Seonam area. 4. '3 nights' is composed of South-coastal zone and Cheju area including many islands. Based on the results, the following suggestions can be made for future study. One is the necessity of classifying the tourism areas around other Kwangyeok cities like Pusan, Taegu, Kwangju and Taejon. The other is that it is needed to classify these types by traffic modes and socio-demographic characteristics.

LCD산업의 성과분석과 리더쉽 유지가능성에 대한 고찰

이정동,유진혁,임채윤,박성배 한국생산성학회 2001 生産性論集 Vol.15 No.2

Learning effect has implication for the performance analysis for the LCD industry which is highly process oriented and capital intensive industry. In this study, we estimate the learning parameter in that industry and investigate the difference in learning across generations. Based on the estimated learning effect, we provide some implication for the question whether the leadership in the industry is sustainable or not.

國有 自然休養林의 空間的 特性과 利用者 餘暇패턴 分析 : 京畿道 有明山·仲美山을 事例로

이혁진 경희대학교 문리과대학 지리학과 1998 地理學叢 Vol. No.

The purpose of this study is to analyze the characteristics of Mt. Yoomyung and Mt. Joongmi nationalized recreational forest by examining the geographic environment and recreational facilities and users' leisure patterns. Literature review, field survey and questionnaire method have been used. The questionnaires numbering 604 were collected from 2 areas. The major findings of this paper are summarized as follows. First, as a result of the field survey, Mt. Yoomyung and Mt. Joongmi belong to 'nationalized forest' according to the right of ownership. From the analysis of the geographic locations, there are relationships with mutual competition and cooperation between 2 areas. In regard to the area and recreational facilities, Mt. Yoomyung showed higher degree of quality than Mt. Joongmi. Second, as for users' residential distributions, study areas belong to 'the Seoul metropolitan circle type'. In the case of users' travel behaviors, the type accompanied with family or friends was the most plentiful. As for the stay period, '1 night 2 day' was the most important. Driving a car was ranked first in traffic modes. Most users spent about 2 hours from their residences to the forest. As for preferred seasons, the favorite one was summer. Next was autumn, spring and winter. Third, in the case of motivation of leisure activities, users tend to prefer 'forest recreation' and 'a rest/recreation'. As for the degree of users' participation, 'forest recreation', 'the sightseeing of physical landscape' and 'relaxation/a simple rest' were higher than 'the gathering and purchase of forest goods' and 'the use of facilities'. They were positively concerned with the mountain location and physical environment. Fourth, from the analysis of users' satisfaction concerning natural resources, users were satisfied with 'physical landscape'. As for the level of recreational facilities, the value of lodging facilities is much higher than that of any other facilities. But as the level of satisfaction, Mt. Yoomyung were higher than that of Mt. Joongmi. Based on the findings of this paper, the following suggestions can be made. First, as a result of the study that focused on 2 areas, there is a need to increase multipurpose spaces for use during 4 seasons in nationalized recreational forests of Korea. Second, the development and managemental plan of the nationalized recreational forest should be linked with not only the income source of nationalized economy but also the place of forest recreation. Thus what is needed is to increase functions of forest recreation and economic income by establishing various recreational facilities. Third, in the case of the nationalized recreational forest, advertising strategies by using various media are needed in order to improve the name value of this forest. Management of recreational facilities is needed in order to harmonize physical environment, conservation and recreational use.

퇴근후 비업무 방문행태에 관한 연구

이동규,정진혁 中央大學校 建設環境硏究所 2002 環境科學硏究 Vol.13 No.1

활동기반 접근방법에서 인간의 통행은 그 자체가 목적이 아니고, 통행과 그 목적지에서의 활동으로 이루어진 파생수요로 정의된다. 이러한 개념을 바탕으로 본 연구에서는 첨두시 교통체증의 주요 원인이 되는 직장인의 활동패턴에 대하여 분석하였다. 이를 위하여 본 연구에서는 개인적인 특성에 대한 변수와 직장인의 업무 후 활동에 관한 활동기반 변수를 고려하여 분석에 사용하였다. 분석에 사용된 자료는 1997년 서울시에서 조사된 일기식 가구 설문조사를 이용하였고, 분석모형은 순서형 프로빗 모형을 이용하여 직장인의 업무 후 비업무 방문수에 관한 모형을 추정하였다. 추정된 결과로 직장인의 업무 후 비업무 방문수는 주 업무 체류시간에 영향을 받는다는 것을 알 수 있었다. 이는 주 업무 시간이 길어지게 되면 직장인들은 가정으로 돌아가야 하는 시간적 제약을 받게 되기 때문에 다른 활동에 제한을 받게 되는 현상을 설명한 것으로 볼 수 있다. 또한, 직장인들의 사회ㆍ경제적인 지표에 대한 영향은 나이가 젊은 직장인일수록 많은 방문을 하고, 남성 직장인일 경우 그리고 수입이 많을수록 많은 방문을 하는 것으로 나타났다. 본 연구는 직장인들의 업무 후 방문 행태에 대한 이해를 위한 시발점이라 할 수 있으나, 보다 깊은 행태 이해를 위해서는 시간에 따른 행태 변화의 이해가 절실하며, 이를 위해서는 패널 자료 구축 및 이용이 필요하다. This paper deals with number of stops made by individuals during their evening commute in the Seoul Metropolitan Area of Korea. Data used here is sample of Household Survey conducted in 1997. The empirical model -Ordered response Probit Models-provides valuable insights with respect to the evening commute trip making behaviors. The findings are, firstly, number of stops during evening commute are significantly related to durations of work-related activities. Secondly, Socio-economic and demographics of workers also effect or number of stops during evening commute . For instance, male, high income, arid younger persons make more number of stops. This research remains a large room for future works. In order to improve the approach, Panel dataset is indispensable to understand behavior of worker along time axes.

고수동굴의 관광특성과 개발에 관한 연구

이혁진,구경원 문화관광연구학회 2000 문화관광연구 Vol.2 No.4

The purpose of this study is to analyze the tourism characteristics of Gosu-Cavern by examining its tourism resources and tourists' behavioral patterns. Field work and questionnaires were administered after a review of literature. The questionnaires numbering 220 were collected from the study area. Major findings from the study show: Gosu-Cavern, one of the most popular limestone caverns of Korea, consists of a various speleothems: stalactite, stalagmite, column and flowstone; it is assumed to have been created about 450 million years ago; As for tourists' residential distributions, this area can be classified as the Seoul Metropolitan Circle and Danyang and Choongcheong type; The most frequent response on visiting type was the one accompanied by family and friends(65.4%); In regard to leigh of stay, a majority of respondents(82.3%) answered 'over 4 hours'. For means of transportation, around half the tourists(48.2%) used their cars; Satisfaction with its internal features was generally high(90.9%). Based on the findings, the following suggestions can be made; 1) natural caves such as Gosu-cavern offer not only National Cultural Assets but also useful leisure spaces for tourists. Accordingly, the continuous management of caves, establishment of internal facilities, and eventually the measures to harmonize their environments and the resources are required: 2) in the case of development of caves, advertising strategies by various media need to be developed in order to be well-known. For this, it is urgent to train the tour guides to explain in detail the mysterious features of the second formation of the caves. 3) in the cases of development of many tour courses, the cooperation between Danyang-gun and its close areas, along with the connection with any other caves and tourism resorts in this area should be considered.