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.

Sol-gel법을 이용한 미세공 실리카 세라믹의 기공구조 변화에 관한 연구

이진휘,연만형,정은정,박노혁 서울産業大學校 1996 논문집 Vol.43 No.1

솔-젤법에 의하여 제조된 미세공 실리카 세라믹에 대하여 N₂-adsorption isotherm 및 TEM에 의하여 기공구조 변화를 조사하였다. Group 1, 2 및 3의 경우 물의 양이 각각 11, 5.5 및 3.8mole까지는 급격히 surface area의 증가를 보이다가 그 이후에는 완만한 상승을 보이는데, 이것은 앞의 실험에서 보인[4.5]gelation time 및 FT-IR의 실험결과와 일치하는 것이다. 서로 다른 물의 양에 대하여 BET surface area와 Cumulative surface area의 차이가 Group 1서 Group 3으로 옮아감에 따라 커지는 것은 용매의 양은 감소하는 반면 TEOS의 양 증가로 인하여 물과 TEOS의 반응이 원활하지 못한 결과로 덜 발달된 polymer에 기인한 작은 particle에 의하여 형성된 작은 기공들에 기인한 것으로 사료된다. 이와같은 기공구조는 TEM의 결과에 의하여 확인할 수 있다. Group A에서 E쪽으로 갈수록 물의 양의 증가에 기인하여 surface area는 증가하며, Group a에서 d쪽으로 갈수록 물의 양의 감소에 기인하여 surface area는 감소한다. N₂-adsorption isotherm and TEM were used to investigate the micro-porous silica ceramic prepared by sol-gel process to find the structural changes of pores. In the case of Group 1, 2 and 3, the drift of the surface area increased steeply till the amount of water 11, 5.5 and 3.8 moles individually and after that showed increased smoothly. It is the same results as the gelation time and the FT-IR[4.5]. It is the reason that the differences of BET and Cumulative surface area become larger proportionally as moving from Group 3 that the reaction of water and TEOS is less active, caused by using decreased quantity of water but increased TEOS, and therefore the smaller pores by the smaller particles were formed. It was identified by TEM. The surface area is increased by the increased water as moving from Group A to Group E, and decreased by the decreased water as moving from a to e.

비정형 기관지 유암종에 의한 이소성 ACTH 증후군 1례

이창훈,천남일,홍세인,정진욱,윤인석,조동혁,강호철,정동진,정민영 全南大醫大 2001 전남의대학술지 Vol.37 No.2

뇌자도 측정을 위한 저잡음 Nb SQUID 센서의 설계 및 제작

이용호,권혁찬,김진목,이상길,임청무,박용기,박종철 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

We report on the design, fabrication and performances of a low-noise Nb SQUID sensor for neuromagnetic measurements. The main features of the developed sensor are i) large flux-to-voltage transfer, making the SQUID readout electronics simple, and ii) use of the integrated planar pickup coil to eliminate the environmental magnetic field noises. The magnetic field noise of the developed SQUID sensor is below 5 fT/√Hz at 100 Hz, which is low enough to be used in neuromagnetic measurements.

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.

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.

자연휴양림의 형성과정과 분포에 관한 연구

이혁진 서울保健大學 1997 論文集 Vol.17 No.1

The leisure time is growing as the result of rapid economic growth in Korea and there are rapid changes how people spend their leisure time. As the counteractive result of the rapid growth of cities in modern society, severe pollution problems have occurred and urban residents are more in hunger for clean air and natural forests. Recreational forest areas are for public health care and rest to promote national welfare as public use of forest resouces in addition to existing forest management. Spending time in recreational forests is highly recommendable activities for many people and their demands for these places are growing rapidly. The purpose of this study is to analyze overall characteristics of recreational forests in Korea by examining the development process, the institutional backgrounds and the distributions of recreational forests. Literature review has been used for the study. The major findings of this study are summarized as follows. First, recreational forests are distributed at 58 regional places, and the space covers an area of about 80,010ha. Recreational forests will be classified 3 kinds, nationalized, public-owned and private forest according to the right of ownership. Second, as a result of analysis of geographical location, distribution pattern of site is closely with position of forest area near a chain of mountains in Korea. Third, as for the number of recreational forests in each' Administrative Unit', Kangwon is the most plentiful one and it is followed by Ch'ungnam, Kyongbuk, Kyongnam, Chonnam and Chonbuk. In regard to distribution by an area, Kyongbuk and Kangwon occupy 86% of all. Fourth, as for changes for 9years(I988~1996), the ratio of the number and area of privated forests has been increased gradually since 1991. Based on the results of the study, the following suggestions can be made for future study in Tourism and Tourism Geography: First, One is the necessity of many studies on the analysis of geographical location on human and physical landscapes as tourist attractions and on the analysis of tourist's travel behavior and leisure pattern by using questionnaire method. The other is that it is needed to analyze impacts of recreational forest as tourism resource on economic, sociocultural and physical environment.

뇌졸중 후 치매환자에서 도네피질(아리셉트^(?))이 인지기능 및 일상생활 수행능력, 삶의 질에 미치는 효과

이상열,장혁,송재은,조성옥,류정미,이미경,조진호,신용일 圓光大學校 醫科學硏究所 2008 圓光醫科學 Vol.23 No.1

Background: This study evaluated the efficacy of administering Donepezil(Aricept^(?)) for improving cognitive function, activities of daily living, and quality of life in patients with post-stroke dementia. Methods: Patients(n=99; mean age, 69.89 years; 48.5% men) with post-stroke dementia, according to criteria of the DSM-IV and MRI, were treated with donepezil 5mg/day or 10mg/day during 24 weeks. They were examined using Mini-mental Status Examination(MMSE), Chinical Dementia Rating(CDR), Barthel Activities of daily living(B-ADL), Instrumental Activities of daily living(I-ADL), Short Form 36 Health Survey-Korean(SF-36-K), and Geriatric Depression Scale(GDS) at before treatment and 24 weeks after treatment. Results: The 97 patients completed the trial. At 24 weeks, they showed significant improvement in MMSE(p<0.001), CDR(p<0.001), B-ADL(p=0.002), I-ADL(p<0.001), and SF-36-K(p=0.003) except GDS(p=0.288). Donepezil was well tolerated. There was no withdrawal due to adverse events. Conclusion: This results demonstrate that donepezil was beneficial in improving the cognitive function, activities of daily living, and quality of life in patients with post-stroke dementia and was well toleraetd.