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.

무선 애드 혹 기반 액티브네트워크상에서 QoS지원에 관한 연구

李基源,裵振勝,丁燦赫,金玄郁,李光培,姜景仁,朴京培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-

Abstract - In this thesis, we propose a QoS supporting method on wireless ad hoc-based active network for improving reliability. On the loss of route path, the existing DSR routing protocol has several problems with wireless network communication because of decease of data reception rate and increase of network load. The proposed method improves reliability of data transfer by using functions of active network. That is, by using functions of active nodes and active packets, the proposed method supports QoS with reservation transfer method that saves data packets on transfer at intermediate nodes with lost path and then re-transmit the packets after route reconfiguration.

초기의 수신증 환자의 요로폐쇄 진단에 있어 Tc-99m MAG3 신장 스캔시 실질통과지연 소견의 유용성

이원우,문대혁,김재승,류진숙,이희경 대한핵의학회 2002 핵의학 분자영상 Vol.36 No.5

목적: 신우 확장이 심하지 않은 상부 요로 폐쇄 환자는 신우의 순응도가 낮아 이뇨신장스캔에서 위음성으로 나올 수 있다. 실질통과지연이 이뇨신장스캔 위음성을 감별해 내는 유용한 소견이 될 가능성이 있다. 저자들은 일측성 요로폐쇄가 의심되는 성인 환자들을 대상으로 Tc-99m MAG3 신장스캔을 실시하였을 때 이뇨신장스캔과 실질통과지연의 폐쇄진단 능력을 비교해 보았다. 대상 및 방법: 일측성 요로폐쇄가 의심되어 Tc-99m MAG3 이뇨신장스캔을 실시한 54명(남:여=30:24, 나이 40.7±15.5세)이 대상 환자군이었다. 이뇨신장스캔의 폐쇄 양성에 대한 진단기준은 T_(1/2)>15분 이었고, 반대측 정상신장에 비해 신우에 방사능이 늦게 나타나고 실질에 방사능 저류가 현저할 때 실질통과지연이 있다고 하였다. 수신증의 정도는 1∼2분 배설기 영상에서 수신증이 있는 신장대 반대편 신장의 면적 비로 구하였다. 폐쇄의 최종 진단은 중재시술 후에 수신증이 호전될 때 혹은 중재시술을 하지 않은 경우는 수신증이 악화될 때였다. 폐쇄 없음으로 정의한 경우는 6개월이상 추적하였을 때 수신증이 변화 없을 때였다. 결과: 26예는 폐쇄가 있었고 28예는 폐쇄가 없었다. 이뇨신장스캔과 실질통과지연의 민감도는 각각 69% (18/26) 와 50% (13/26)이었고 이뇨신장스캔으로 위음성을 보였던 2예의 폐쇄를 실질통과지연으로 더 찾을 수 있었으며 이들은 신장 면적 비가 1.1미만이었다. 이뇨신장스캔 혹은 실질통과지연으로 폐쇄를 진단할 수 있었던 20예 중 실질통과지연이 있었던 13예는 실질통과지연이 없었던 7예보다 신장 면적 비가 유의하게 작았으나(0.97±0.20 vs 1.30±0.41, p<0.05) 상대신기능은 차이가 없었다. 특이도는 실질통과지연이 100% (28/28)이고 이뇨신장스캔은 89% (25/28)이었다. 결론: Tc-99m MAG3 스캔에서 실질통과지연은 신우 확장 정도가 심하지 않은 요로폐쇄에서 이뇨신장스캔이 위음성인 경우의 요로폐쇄 진단에 도움이 될 수 있다. Purpose: Diuretic renography (DR) can be false negative in patients with upper urinary tract obstruction due to low compliance of the renal pelvis. Delayed parenchymal transit (DPT) may be a valuable sign in case of false negative DR. We compared the diagnostic values of DR and DPT during Tc-99m MAG3 diuretic scan in adults with suspected unilateral obstructive uropathy. Materials and Methods: Fifty-four patients (male:female=30:24, age: 40.7 15.5 yrs) who underwent Tc-99m MAG3 diuretic scan due to suspicious unilateral obstructive uropathy were analyzed. DR with a T_(1/2) of > 15 min was considered as positive for obstruction. DPT was considered to be present when there was delayed appearance of radioactivity in the renal pelvis and prolonged retention of radioactivity in the renal parenchyma. The renal area ratios was defined as the ratic of pixel number of hydronephrotic kidney over that of normal contralateral at 1∼2 min images. Definition of obstruction was improved hydronephrosis after intervention, or aggravated hydronephrosis without intervention. Non-obstruction was defined as unchanged hydronephrosis over 6 months. Results: Twenty-six renal units had obstruction and 28 no obstruction. The sensitivities of DR and DPT were 69% (18/26) and 50% (13/26) respectively. Two renal units with DPT but negative DR showed the renal area ratio of <1.1. Among the 20 obstructive renal units with DPT or positive DR, 13 with DPT had lower renal area ratio than 7 renal units without DPT (0.97±0.20 vs 1.30=0.41, p<0.05). Differential renal function was not significantly different between these groups. DPT correctly diagnosed all renal units with non-obstruction (specificity 100%), while the specificity of DR was 89% (25/28). Conclusion: DPT during Tc-99m MAG3 diuretic scan may be a valuable sign in diagnosing urinary obstruction especially in patients with false negative DR and early HN. (Korean J Nucl Med 2002;36:306-13)

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.

결합조직형성 모종 1예

이병진,노진혁,조옥자,박시룡 대한피부과학회 2003 大韓皮膚科學會誌 Vol.41 No.1

Desmoplastic trichilemmoma is a rare variant of trichilemmoma characterized by typical features of trichilemmoma with abundant desmoplastic stroma. We report herein a 54-year-old man presented with 2-year history of a solitary bean sized verrucous nodule on the occipital scalp. Histologically, the tumor showed a well-defined lobular growth extending from the epidermis into the dermis with abundant central desmoplastic stroma. Epithelial lobules at the margins of the neoplasm showed the typical features of trichilemmoma composed of glycogen-rich clear cells and peripheral palisading columnar cells. In contrast, at the center the cells assume a more random pattern of cords and strands traversed by the hyaline stroma, mimicking invasive carcinoma. It was diagnosed desmoplastic trichilemmoma by the distinctive histologic appearance and totally excised. (Korean J Dermatol 2003;41(1) : 120∼122)

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.

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.

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.