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간세포암의 직경과 위치에 따른 고주파 열치료의 치료효과 및 합병증에 관한 연구
유정남 ( Jung Nam Yoo ),신우원 ( Woo Won Shin ),강기태 ( Ki Tae Kang ),조정환 ( Jung Hwan Cho ),문성훈 ( Sung Hun Moon ),윤욱돈 ( Uk Don Yun ),장채령 ( Chae Ryeong Jang ),이태영 ( Tae Yeong Lee ),안원석 ( Won Suk An ),이종훈 ( Jon 대한내과학회 2002 대한내과학회지 Vol.63 No.5
Background : Induction of coagulation necrosis by using thermal energy sources such as radio-frequency (RF), microwaves and lasers has recently been as a new, minimally invasive technique for percutaneous tumor ablation. RF ablation is considerd effective and safe for the local control of small HCCs. The aim of this study is to evaluate the therapeutic efficacy and complications according to the diameter and location of the HCC. Methods : Between May 1999 and December 2000, one hundred fifty patients underwent RF thermal ablation in Dong-A university hospital. Among them, forty nine patients were enrolled in this study who have no history of prior other treatment including hepatic resection, TAE, PEI, and chemotherapy, also who have follow-up CT performed at least six months after ablation. The patients devided into two groups, who have small HCC (.3 cm in diameter) and the others. Recurrence rate was also evaluated with spiral CT performd at least six months after treatment. Results : In large HCC group (>3 cm in diameter), the mean follow-up duration was 10.8 months and local recurrence rate was 51.0%?12.4. In small HCC group (.3 cm in diameter), the mean follow-up duration was 12.7 months. Local recurrence rate was 16.2%?8.6 in patients with small HCC. Among one hundred fifty patients underwent radio-frequency thermal ablation, 5 cases of intraperitoneal bleeding, 5 cases of pleural effusion and 3 cases of pneumothorax were observed. In most of cases, the necrotic area of HCC reached to the capsule of liver or located in hepatic dome. Conclusion : Radio-frequency ablation appears to be more effective and safe for the treatment of small HCC than that of large HCC and more attetion must be given to the RF ablation if the tumor is larger than 3cm or located close to the capsule of liver or in hepatic dome. (Korean J Med 63:507-512, 2002) Key Words : Radio - frequency Ablation, Carcinoma, Hepatocellular
센터필라 적용을 위한 이종 접합강의 충격 특성 해석에 관한 연구
남기우(Ki Woo Nam),박상현(Sang Hyun Park),유정수(Jung Su Yoo),이상문(Sang Mun Lee) 대한기계학회 2012 大韓機械學會論文集A Vol.36 No.8
본 연구에서는 레이저 TWB로 용접된 이종재료의 동적 특성에 대한 해석이 수행되었다. 해석프로그램은 Hyper works 10.0으로 Solver는 LS-DYNA v.971, 모델링 요소는 2D-Shell, 요소 수는 35,641개, 노드 수는 36,561개이다. 충격속도는 10 ㎞/h이다. 상ㆍ하부의 용접선 높이에 따르는 영향을 연구하기 위하여, 하부의 길이를 300 ㎜와 400 ㎜로 하였다. 얻어진 결론은 다음과 같다. 길이 300 ㎜인 하부 재료 SPFC980의 변형은 가장 작고, 충돌 흡수 에너지는 가장 크다. 하부 냉연강 기준으로 TWB의 위치가 짧을수록 성능이 우수하게 나타났다. 즉, 상대적으로 상부 고강도강인 SABC1470 재료가 차지하는 비율에 따라 성능이 좌우되었다. 하부 재료 SPFH590은 큰 변형이 나타났고, 충돌성능은 SPFC980보다 현저히 떨어졌다. 따라서 충돌 성능 해석 결과에서 하부 재료 SPFC980인 길이 300 ㎜가 가장 우수한 것으로 나타났다. This study was carried out to analyze the dynamic characteristics of laser tailor-welded blanks (TWBs) made of dissimilar materials. The analysis was performed using Hyper Works 10.0 with Solver LS-DYNA v.971. 2D-Shell was used as the modeling element, and the number of elements and nodes was 35,641 and 36,561, respectively. The impact speed was 10 ㎞/h. To analyze the impact characteristics according to the height of the weld line for the upper and lower parts of the center pillar, the length of the lower part was set as 300 and 400 ㎜. When the lower part was made of SPFC980 steel with a length of 300 ㎜, the deformation was the smallest and the absorbed energy of the impact force was the largest. On based the lower part of center pillar, the position of TWB shows the shorter and the better value. In other words, the performance depended on the proportion of the upper part made of high-strength SABC1470 steel. A lower part made of SPFH590 steel showed large deformation. In contrast, a lower part made of SPFC980 steel showed significantly lesser deformation. Therefore, the impact performance of a lower part made of SPFC980 steel with a length of 300 ㎜ showed the best analysis result.
유정남(Jung-Nam Yoo),이정철(Jung-Chul Lee) 한국여행학회 2001 여행학연구 Vol.14 No.-
Service quality, customer satisfaction and switching barrier are increase to repeat guests and aids to customer loyalty. Increasing of repeat guest give profits of hotel's F &8 products. Specialty, hotel products intention to service quality are has to distinction of service and increasing to production and interesting of concern with loyalty. Result of this study presents fourth device for customer loyalty in hotel's F &8 products. First, Hotel must managing guest managing program with effect and systemic and reviewing importance of customer management. Second, Hotel has going to effect of brand recognition, store recognition and service recognition for example managing of image, professional and kindness and education of staffs, correctness and convenience of reservation and atmosphere of restaurant marketing acts for customer loyalty etc. Third, Improving total service quality for customer satisfaction and recognition of importance of membership to staffs. Fourth, Marketer is going to effect increasing of customer loyalty with membership service system.
외식서비스 인카운터 유목(類目)시스템(Category System) 개발에 관한 연구
박정영(Jung young Park),유정남(Jung nam Yoo) 한국외식경영학회 2001 외식경영연구 Vol.4 No.1
The quality of each service encounter which consists of an entire service should be improved in order to get high qualities in the practical services. The main purpose of this study is to develop a category system of foodservice encounters, which can be the grounded base for the food service studies. In order to achieve the purpose, this study applied the Critical Incident Technique(CIT) to foodservice encounters as a research method that could have researchers collecting very detailed critical data and giving practical insights to the practitioners. 177 satisfying and 169 dissatisfying incidents were collected on-line from 246 customers who had visited restaurants at least once during the last year. The category system developed in this study has five main groups such as core services, employee responses to the needs requested by customers, unprompted and unsolicited employee actions, surroundings and facilities, and system itself and thirty-six categories, which are more detailed than those of other CIT studies. The thirty-six categories include very precise critical elements in the foodservice encounters and some of them have never been found in other foodservice studies. The six management strategies were suggested based on the results.
불안정 지지면에서의 유산소 운동이 심폐기능과 균형능력에 미치는 영향
권효륜(Hyo-Ryun Kwon),김미소(Mi-So Kim),남유정(Yu-Jung Nam),박혜민(Hye-Min Park),이경선(Kyeong-Sun Lee),조홍덕(Hong-Deok Jo),최동원(Dong-Won Choi),양회송(Heo-Song Yang),유영대(Young-Dae Yoo),강효정(Hyo-jeong Kang),정찬주(Chan-Joo Jeo 대한심장호흡물리치료학회 2018 대한심장호흡물리치료학회지 Vol.6 No.1
The purpose of this study was to investigate the effects of aerobic exercise with unstable supporting surface on cardio-pulmonary function and balance ability. Methods : This study was performed on 20 subjects. The subjects were divided into two groups; stable supporting surface group(Group Ⅰ, n=10), unstable supporting surface group(Group Ⅱ, n=10). The groups performed the aerobic exercise, which is jump rope exercise, 2 times a week for 4 weeks. Results : The results were as follows. There was statistically significant difference of cardiovascular endurance in Group Ⅰ(p<0.05), and there were statistically significant difference of cardiovascular endurancedynamic, OSI and dynamic APSI in Group Ⅱ (p<0.05). However, there were no statistically significant difference in pulmonary functions which were FVC and FEV1 in Group Ⅰand Group Ⅱ. Conclusion : As a result of this study, aerobic exercise with unstable supporting surface have a potential to induce positive responses in cardiovascular endurance and dynamic balance ability of healthy adults.
CT 유도하 경피적 흉부 세침생검 후 발생한 뇌 공기 색전증 1례
양두경 ( Doo Kyung Yang ),이수걸 ( Soo Keol Lee ),서성환 ( Sung Wan Suh ),손유정 ( You Jeong Sohn ),김경태 ( Kyoung Tae Kim ),유정남 ( Jung Nam Yoo ),김종국 ( Jong Kuk Kim ),노미숙 ( Mee Sook Roh ),최필조 ( Pil Jo Choi ),김기남 ( 대한결핵 및 호흡기학회 2004 Tuberculosis and Respiratory Diseases Vol.57 No.5