제주특별자치도 10년, 지방세 세입성과와 과제에 대한 사례연구

채종우(Jong Woo Chae),정순여(Soon Yeo Jung) 제주대학교 관광과경영경제연구소 2016 産經論集 Vol.37 No.1

This study is mainly actively working practices for tax exemption and tax revenue raising to explore ways for sustainable growth of the local tax revenue from 2006 to 2015 were analyzed. This was mainly to present the local tax revenue environmental changes, thus local tax revenue and kidney due, the main cause analysis of revenues kidney, kidney revenue challenges for sustainable revenue raising measures, etc.

유비쿼터스 컴퓨팅 환경을 위한 적응적 SSL/TLS 보안서비스

채종우(Jongwoo Chae),서정철(Jungchul Seo),정목동(Mokdong Chung) 한국정보과학회 영남지부 2003 한국정보과학회 영남지부 학술발표논문집 Vol.11 No.1

적응적 네트워크 보안 관리

채종우(Jongwoo Chae),함창현(Chang-Hyun Ham),정목동(Mokdong Chung) 한국정보과학회 영남지부 2004 한국정보과학회 영남지부 학술발표논문집 Vol.12 No.1

본 연구는 다양한 유무선 인터넷 환경에서 안전한 보안서비스를 제공하기 위하여, 단말기의 성능, 단말기가 제공하는 네트워크의 종류, 서비스 종류, 사용자 보안 선호도 등의 다양한 환경 변수에 따라 적응성 있게 보안 정도를 동적으로 결정할 수 있도록 MAUT와 휴리스틱스를 이용한 보안 정책 알고리즘을 개발한다. 이 알고리즘은 무선 PKI가 적용되지 않는 상황에서도 최적의 보안 방법을 사용자에게 제시하여 사용자에게 신뢰성 있는 유무선 인터넷 환경을 이용할 수 있는 시스템을 구축한다. 제안된 보안 서비스는 유무선 인터넷 환경에 존재하는 다양한 네트워크 장비, 디바이스에 대한 효율적인 관리를 수행하기 위하여 SNMP를 사용한다.

청소년 야구 선수에서 발생한 거골하 관절의 활액막 골연골종증

채종우 ( Jong Woo Chae ),조형래 ( Hyung Lae Cho ),오용승 ( Yong Seung Oh ),이완석 ( Wan Seok Lee ) 대한스포츠의학회 2018 대한스포츠의학회지 Vol.36 No.4

Synovial chondromatosis is an uncommon disorder characterized by cartilaginous proliferation within the synovial membrane of the articular joint. Smaller joints are rarely affected and it may be progressed to osteochondromatosis after ossification or calcification of metaplastic cartilage. It is commonly presented in the third to fourth decade of life, but rarely presented in adolescence. We report a unique case of synovial osteochondromatosis of the subtalar joint in 14-year-old baseball player. Arthroscopic removal of loose body and complete excision of the osteochondral mass with concomitant synovectomy resulted in satisfactory outcome without recurrence at final follow-up.

벽돌 쌓기 기법을 이용한 원위 요골 관절 내분쇄 골절의 해부학적 정복술

김형민,조형래,채종우,신명지 대한골절학회 2018 대한골절학회지 Vol.31 No.1

Purpose: This study examined the clinical outcomes of comminuted intraarticular distal radius fractures treated by an anatomical reduction using a brick-work technique. Materials and Methods: Seventeen patients with AO/OTA type 23-C3 distal radius fractures were enrolled in this study. An anatomical reduction of the articular surface was achieved using a brick-work technique through the dorsal approach and dorsal plates were used for fixation. The postoperative functional results were assessed with the range of motion of the wrist and the modified Mayo wrist score (MMWS). In addition, the radial length, radial inclination, volar tilt, and Lidstrom score were evaluated from the radiology results. The mean postoperative follow-up period was 13.6 months. Results: All patients showed bony union and the mean range of motion of the injured wrists was 94% (92% to 95%) of the uninjured side. The mean MMWS was 85.3, and the functional results were excellent in 12 patients, good in 4, and fair in one at the final follow-up. Based on the final radiographic measurements, the radial length, volar tilt, and radial inclination were 11.4 mm (10.0 to 13.5 mm), 6.6° (—1.8° to 9.2°), and 21.3° (20.1° to 25.7°), respectively. The radiologic results according to the Lidstrom score were excellent in 14 patients and good in three. Conclusion: An anatomical reduction with the brick-work technique is relatively easy, results in a reproducible clinical outcome, and could be a safe and effective treatment option for severe comminuted intraarticular distal radius fractures that are not amenable to volar plate fixation.

13Cr 마르텐사이트계 스테인리스강의 내식성에 미치는 Mo 첨가량 및 템퍼링 온도의 영향

안용식,박화순,채종우 대한금속재료학회(대한금속학회) 1999 대한금속·재료학회지 Vol.37 No.7

Martensitic Stainless Steel has high strength and hardness in comparison with other stainless steels. But the toughness and corrosion resistance is lower. So lots of researches have been done in order to improve these properties. In the previous study the alloying element of Mo resulted in increasing the toughness at tempered condition of the steel. It has been investigated in this work how the Mo addition and tempering condition influence on the various types of corrosion behavior of 13% Cr martensitic stainless steel. Corrosion resistance was hardly changed by the tempering up to temperature of 500℃, but decreased at 600℃ due to the formation of Cr carbide on the prior austenite boundary. However, the corrosion resistance increased again at 700℃, because Cr carbides were resolved and redistributed. Both general corrosion resistance and intergranular corrosion resistance of tempered steel are significantly improved with Mo content.

적응적 보안등급을 이용한 컨텍스트-기반 보안정책 관리모델

서정철(Jungchul Seo),채종우(Jongwoo Chae),정목동(Mokdong Chung) 한국정보과학회 2004 한국정보과학회 학술발표논문집 Vol.31 No.1A

최근 인터넷의 급성장을 기반으로 유비쿼터스 환경이 도래하면서 다양한 환경요소를 가진 자원들이 네트워크 상에 공존한다. 이러한 환경에서 적절한 보안 서비스를 제공하기 위해서는 자원의 환경정보를 제공하는 컨텍스트(Context)를 기반으로 적절한 보안정책을 결정하는 것이 필요하다. 본 논문에서는 유비쿼터스 환경에서 제공되는 상황정보를 통해 사용자의 선호도, 디바이스의 성능, 서비스의 가치 등 다양한 자원의 환경요소를 획득하여 MAUT와 간결한 휴리스틱스를 이용하여 자원에 적절한 보안 등급을 적응적으로 결정하는 알고리즘을 제안하고, 이를 바탕으로 유비쿼터스 환경에 적합한 보안정책 관리 모델을 제안한다.

후방 강선 고정법을 이용한 환축추 후방유합술 19례 분석 : Analysis of 19 Cases

장한,김승기,박종범,채종우,이성재 대한척추외과학회 1997 대한척추외과학회지 Vol.4 No.2

Study design : Clinical and radiological outcomes of nineteen patients who underwent posterior atlantoaxial stabilization with wiring were reviewed. Objectives : To determine the efficacy of the procedure per se. Particular attentions were paid on the technical problems associated with and the relationship between the outcome and the rotatory motion. Summary of Literature Review : Some authors have reported posterior atlantoaxial fusion to some extent restricts the rotatory movement of the cervical spine despite of relatively high success rate. Materials and Methods : The patients included rheumatoid atlantoaxial instability(8), type 11 dens fracture(5), atlantoaxial rotatory fixation(3), traumatic atlantoaxial subluxation(2), and Os odontoideum(l ). Pre and post-operative radiographs including flexion/extension lateral views from all paitents were studied. From five patients, the residual and compensatory rotatory motion at atlantooccipital joint and other cervical segments were assessed using dynamic CT scans at which the patients underwent extreme right and left axial rotation of the head in the transverse plane. Results : Solid fusion was achieved in sixteen of nineteen patients (84.2%). Three cases of nonunion were observed : two from rheumatoid group and one from dens fracture group. Of sixteen patients, recurrent translation secondary to wire loosening was seen in four patients, of whom two were rheumatoid atlantoaxial instability. Wire breakage was found in one case which 19-gauge wire was used. The assessed values for the total range of axial rotation across the entire cervical spine(from CO-C l to C7-T1) were 36, 32, 56, 73, and 56 degrees in five patients who were evaluated postoperatively with dynamic CT scans at 6, 9, 36, 36, and 48 months respectively. Conclusions : The rotatory motion data along with clinical evaluation of patients revealed no significant limitation in daily activities despite of the absence of motion at the C1-2 joint. In rheumatoid atlantoaxial instability, the problems associated with wire loosening were apparent. Consequently, the greater technical precision and more rigid internal fixation such as transarticular screw fixation or external immobilization can be suggested.

X9.59를 이용한 DRM 기반 컨텐츠 유통 시스템 설계 및 구현

김환조(Hwan-Jo Kim),채종우(Jong-woo Chae),정목동(Mokdong Chung) 한국멀티미디어학회 2003 한국멀티미디어학회 학술발표논문집 Vol.2003 No.1

퇴행성 척추관 협착증과 동반된 골다공증성 압박 골절의 병합 치료

백승욱,김 철,장 한,채종우 대한골다공증학회 2014 Osteoporosis and Sarcopenia Vol.12 No.1

Objectives: To analyze the treatment results of combined treatment with percutaneous vertebroplasty and adhesiolysis in the patients who happened the osteoporotic compression fractures during the conservative treatment of pre-existing degenerative spinal stenosis. Materials and Methods: A retrospective review was carried out on 38 patients who happened the osteoporotic compression fractures during the conservative treatment of pre-existing degenerative spinal stenosis. We performed percutaneous vertebroplasty for osteoporotic compression fractures and adhesiolysis for degenerative spinal stenosis after 4 weeks after vertebroplasty. Radiologic results were evaluated by progression of compression rate, fractures in adjacent segment and change of the BMD. Clinical results were evaluated with Denis pain scale for osteoporotic compression fractures and Katz satisfaction scale for degenerative spinal stenosis. Results: The compression rate was 30.2% preoperatively, 21.4% postoperatively, and 24.6% at 12 months postoperatively. There was no fracture in adjacent segment. Clinically, the Denis score were P3 in 13 and P4 in 25, preoperatively, P1 in 11 and P2 in 26, P3 in 1, postoperatively (P=0.03). In regard to degenerative diseases, the Kats scale were 38 to 5, 86.8% in low back pain (P=0.017) and 38 to 4, 89.4% in claudication (P=0.006). The overall Katz satisfaction scale was 81.5% at 12 months postoperatively. The BMD changes in patients who treated neuroplasty was not significant (P=0.175). Conclusions: The combined treatment with percutaneous vertebroplasty and adhesiolysis may be an effective treatment strategy for the osteoporotic compression fracture and spinal stenosis without surgical intervention in old age patients.