혈액 투석 환자에서 중심정맥 협착에 대한 스텐트 삽입술 : Wallstent Placement

임대승,노상필,이유선,정승현,김보영,이정우,강정아,김정희,이민수,정준용,최시완,정진옥,성인환,이강욱,신영태 충남대학교 의과대학 의학연구소 2002 충남의대잡지 Vol.29 No.1

Stenosis of central vein is a common complication arising after percutaneous subclavian vein catheter insertion performed for temporary vascular access in chronic renal failure patients undergoing hemodialysis. There are several treatment methods for the condition like percutaneous angioplasty(PTA), stent insertion, and surgery, but recent trend is toward PTA and stents. Among the patients diagnosed with chronic renal failure from March 1993 to May 2002 and undergoing hemodialysis through AV fistula, the 14 Patients in whom central vein stenosis arose were selected for the study. A total of 28 percutaneous interventions(5 PTA and 23 stent placement) were performed, and restenosis rate and the time taken till the restenosis in de novo lesions and instant lesions were compared. All 28 cases were operated successfully. The 14 cases that received both anigioplasty and stent placement initially. (de novo lesion : 14 cases), Among the 10 cases with de novo lesion that followed up more than 1 year, 3 cases are currently undergoing hemodialysis without restenosis, and the remaining 7 cases have recurred stenosis with the mean time to restenosis of 10.9 months. In the 7 cases in whom stenosis recurred, 11 interventions were done(instent lesion: 11 cases). 4 of these were using only ballon angioplasty with 100% restenosis rate and the mean time of 3 months until restenosis. The remaining 7 cases were using both balloon angioplasty and stent placement, also with 100% restenosis rate but with the mean time of 12 months until restenosis, which was later than the group receiving only balloon angioplasty. In treating the patients with central vein stenosis, stent placement seems to be more advantageous over PTA in terms of restenosis rate and the mean duration of patency. In the case of instent lesion, inserting the stent for the second time after stenosis recurred lengthened the duration of patency compared to performing balloon angioplasty alone.

소속 학교별 탁구지도자의 리더십유형과 경기력의 관계

임준택,김주희 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3

The purpose of this study is to determine the effect of leadership styles on performances of table-tennis players. With a population consisting of table-tennis players in secondary schools and colleges, who are registered in the Korea Table-Tennis Association as of 2003, stratified cluster random sampling was used for sampling and thus the data of a total of 554 students-259 males and 295 females-were actually used for an analysis. This study used the leadership scale for sport, (LSS), which is a domestic adaptation and standardization by Kim Byeong-hyeon and his associates (1990) of the development by Chelladurai and Saleh, The questionnaire to measure basic background variables included three questions, sex, position, and career, and that to measure performances, included two questions, 'performances in personal competitions' and 'those in team competitions.' Researchers and assistants personally visited the students in the sample to distribute questionnaires and then collected them after answered with the self-administrated method. Among the data collected, the data with double or no answers were excluded from those for the analysis; each of encoded data was inputted in a computer and then was processed according to the purpose of analysis using the SPSS Windows 10.0 Version, a statistical program. For data analysis, this study conducted one-way ANOVA and the standard multiple regression analysis. Based on hypotheses of this study, the concrete results were as follow: First, there were significant differences in leadership styles by basic background variables (sex, position and career). Second, there were in part significant differences in performances of table-tennis players by basic background variables (sex, position and career). Third, leadership styles of each school affected performances of table-tennis players.

원자 모형과 오비탈에 대한 고등학생들의 이해

임희준 한국과학교육학회 2005 한국과학교육학회지 Vol.25 No.2

본 연구에서는 고등학생들을 대상으로 원자 모형과 오비탈에 대한 이해, 원자 모형과 오비탈 사이의 관계에 대한 이해, 그리고 오비탈 개념의 유용성 및 다른 개념과의 관련성에 대한 인식을 조사하였다. 조사 결과, 각각 1/3정도의 학생만이 원자 모형과 오비탈 개념을 현대적 관점으로 적절하게 설명하고 있었으며, 이 두 개념 모두를 올바르게 이해하고 있는 학생은 매우 적었다. 특히 적지 않은 학생들이 현대의 원자 모형을 오비탈 개념을 토대로 적절하게 이해하지 못하고 있었으며, 서로 밀접하게 관련되어 있는 이 두 개념에 대한 설명 사이에 일관성이 없었다. 두 개념 사이의 관계에 대해서도 대부분의 학생들이 이를 아예 인식하지 못하고 있거나 부적절하게 인식하고 있었다. 또한 60% 정도의 학생들이 오비탈 개념이 다른 학습에 도움이 된 것이 없다고 응답하여, 많은 학생들이 오비탈 개념을 다른 개념과 관련되어 있는 의미있고 유용한 개념으로 인식하지 못함을 알 수 있었다. 이로부터 원자 모형과 오비탈 개념 자체뿐만 아니라 이들 개념의 상호 관련성 및 다른 화학 개념과의 관련성이 유의미하게 이해되도록 지도할 필요가 있음을 논의하였다. This study investigated high school students' understanding of the atomic model, orbitals, and the relationship between the two concepts. This study also examined their perceptions of the usefulness of the learning about orbitals in learning other concepts. The results revealed that only one third of the students were able to properly explain either the atomic model or orbitals concepts, respectively. But there were few students who understood both concepts well. Most students did not understand the modern atomic model on the basis of orbitals concept. Rather, they exhibited their mixed understanding between the quantum mechanics model and Bohr's model. In general, students showed not only the difficulty understanding the concepts of the atomic model and orbitals, but also a disconnected and inconsistent way of understanding those concepts. In particular, only a few of the students understood that there is relationship between the atomic model and orbitals. Sixty percent of the students conceived the learning of orbitals concept was not helpful for their science learning, which showed their perceptions that the learning of orbitals was not meaningful and useful to learn other concepts. Thus, the findings imply that we need to aim for helping students not only understand the concepts themselves, but also make sense of the interconnected nature of those two concepts along with other relevant science concepts.

근대건축물의 상업용도 활용 사례연구 : 일본 교토시의 등록문화재를 대상으로

임태희,石田潤一郞,김태영 대한건축학회 2004 대한건축학회논문집 Vol.20 No.7

Many have been expected, such as the change of the recognition and the amplified efforts toward the conservation of historical architecture, by the execution of ‘the registered cultural properties act’ since July of 2001 in Korea. This act is mainly intended to promote both the reuse and the restoration of the modern architecture. I hereby introduce the present situation of modern architecture and the analysis of preceding examples for the reuse and restoration of them in Kyoto city, by the comparison of the original uses and the present applications, especially on commercial purpose. Buildings having large internal spaces, like public halls, banks, offices, and educational building, are modified to hold shops or commercial complexes, and their modern interior elements are still functioning as ornaments to remind their original era. Houses are usually modified into restaurants or cafes in order to make the most of living facilities. This commercial modification largely depends on their new uses and the layout of the internal space changes dramatically. Accordingly, new methods and technologies are put into practice to acquire structural stability and facility reinforcement, however the original structures have been damaged by the repeated restructuring and the customers of various kinds.

일본 근대건축 보존개념의 변천에 관한 연구 : 1970-1999까지의 월간 『신켄치쿠(新建築)』誌를 대상으로 by Reviewing Monthly Magazine, 'Shinkenchiku' between 1970 to 1999.

임태희,石田潤一郞 대한건축학회 2005 대한건축학회논문집 Vol.21 No.3

Ever since explosive interest was drawn to the conservation and renovation of modern architecture in 1970’s, there have been a series of changes in its concepts and application patterns in Japan. These changes were analyzed by reviewing the works and the articles on the monthly magazine, 'Shin-kenchiku' of last 30 years, and can be regarded as trend transition by the time. To illustrate the characteristics of those trends are mentioned three concepts, dot, line, and area. When the movement of the conservation and renovation first appeared in 1974, they were evaluated historically and preserved as heritages. This pattern is regarded as ‘dot’ since being independent. But it is promoted to 'line' when harmonizing with the surroundings, just as seen in the case of 'Nakakyo Post Office' in 1978. From around 1988, it became 'area' through introduction of new concepts, like 'application of architectural method' and 'activation of the region'. In other words, the concept of the conservation of modern architecture shifted from something historical, cultural, and preservative to social, commercial, and utilizable.

용융슬래그로부터 합성된 제올라이트 이용한 해수 중의 N, P 제거

임준혁,정진영,이성우,홍성호,김경희,이제근 한국공업화학회 2003 응용화학 Vol.7 No.1

This study examined, as the one way of using zeolite, the about the removal of ammonia nitrogen and phosphorus that cause the eutrophication occurred the adjoining seas.4A type zeolite was used as an adsorbent to remve NH_4-N, PO_4^3-P ion in the artificial seawater. Zeolite is more required than in the fiesh water, under the same conditions, in order to remove NH_4-N in the sea water. The lower the thickness of NH_4-N is in the early stage, the more Freundlich type equation the value of 1./n increases. In case of PO_4^3-P indicated that the removal efficiency was relatively independent of PO_4^3-P concentration. Freundlich parameter 1/n has the value nuder 2. So it shows that absorption is made with relatively ease.

원발성 후복막 점액낭샘암종 1예

지준호,이화정,박승찬,박정철,최은정,서혜진,이원식,이정림,배병조,손경락,이경희 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

Primary retroperitoneal mucinous cystadenocarcinoma is a very rare malignancy, and little is known concerning its Pathogenesis, optimal treatment, and prognosis. A 29-year-o1d pregnant woman (21 weeks) Presented with abdominal discomfort CA 19-9, CA 125, and CEA were normal Abdominal CT scanning revealed a 19x15x13 cm retropentoneal tumor Exploratory laparotomy and tumor excision were performed. Mucinous retropentoneal implants were removed as completely as possible Histologically, the tumor showed focal areas of capsular invasion, but free resection margins The uterus and both ovaries were normal in appearance No adjuvant therapy was pursued. Six months later, Peritoneal and bilateral ovarian metastases were discovered. Hence, we report the details of this case of primary retroperitoneal mucinous Cystadeno-carcinoma and present a review of the literature.

예견퍼지 알고리즘을 사용한 트럭-트레일러의 자율주차 제어 시스템에 관한 연구

손준익,박희경,박재현,강신출,임영도 東亞大學校 附設 情報通信硏究所 1999 情報通信硏究所論文誌 Vol.7 No.1

본 논문에서는 예견퍼지 알고리즘을 사용하여 트럭-트레일러의 자율주차 제어 시스템의 시뮬레이션을 행한다. 트럭-트레일러의 전·후진 동특성 방정식을 설정하여 예견퍼지 제어기의 설계시에 사용하고, 새상 시스템으로도 사용한다. 제안한 알고리즘으로 시뮬레이션을 통해서 일정 지역내의 임의의 출발점에서 적절한 도중목표를 설정하여 전후진을 하면서 핸들조작 횟수가 적게 최종목표 위치에 잘 주차됨을 입증하였다.

반복 용체화처리에 의해 조직제어된 Ti-6Al-4V 합금의 인장성질

조형준,임영호,이준희 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.2

The purpose of the present study is to improve the tensile properties of the beta-quenched with little strain due to processing, only by heat treatment. Control of volume fraction, morphology and distribution of alpha is of great importance in achieving desired mechanical properties with a good combination of strength and elongation. Accordingly, a cyclic solution treatment has been proposed to obtain bimodal structures of equiaxed and acicular alphas. The microstructures of the specimens subjected to the Cyclic Ⅲ solution treatment consisted of nearly equiaxed and acicular alphas with the matrix of the tempered martensite. As a result, the tensile properties became almost equivalent to the specimens of the double solution treatment in the α+β region.

SD Rats를 이용 1-hexene의 흡입독성 연구

김현영,임철홍,정용현,이권섭,이성배,이준연,한정희,전윤석,이용묵 한국환경독성학회 2001 환경독성보건학회지 Vol.16 No.4

The purpose of this study was to investigate the acute (4 hours) and repeated-dose (6 hours a day, 5 days a week, 4 weeks) toxic effects of I -hexene on Sprague- Dawley (SD) rats which were treated by inhalation. The results were as follows; I. The median lethal concentration (LC_(50)) was estimated 52,694 ppm (confidence limit 95%; 49,494~55,447 ppm) in acute inhalation. Abnormal clinical signs related to the l-Hexene were not observed with the acute inhalation dose. Gross findings of necropsy revealed on evidence of specific toxicity related to the 1-hexene, II. By repeated inhalation exposure the body weight of male were more or less reduced by the dose of 2,500 ppm and 5,000 ppm compared with control group. However there were no significant variation hematology and blood biochemistry for the exposed rats compared with the control rats. Abnormal clinical signs and gross findings of necropsy related to the 1-hexene were not shown. In conclusion when we exposed I-hexene to SD rats for 4 weeks, 5 days per week, 6 hours per day, the Lowest observed effect level (LOEL) was over 2,500 ppm and Non observed effect level (NOEL) was below 500 ppm.