http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
VoIP 보안 취약점 공격에 대한 기존 보안 장비의 대응 분석 연구
박진범(Jin-Bum Park),백형구(Hyung-Goo Paek),원용근(Yong-Geun Won),임채태(Chae-Tae Im),황병우(Byoung-Woo Hwang) 한국정보보호학회 2007 情報保護學會誌 Vol.17 No.5
초고속 인터넷의 보급 확산과 IT 기술의 급격한 발전으로 우리 사회에서 인터넷 이용이 보편화를 넘어 필수적인 요소로 자리 잡고 있다. 이러한 현상에 따른 이용자 증가로 인해 최근 들어 패킷 망에 음성을 실어 보내는 VoIP(Voice Over Internet Protocol) 기술이 주목을 받고 있다. 이 기술로 인해 저렴한 통신비용 및 다양한 부가 서비스의 제공 가능성에 따라 새로운 비즈니스 모델이 증가할 것으로 예상되고 있다. 그러나 VoIP 서비스는 기존 인터넷망에서 발생할 수 있는 보안 취약성 뿐만 아니라 인터넷 전화 트래픽 통과 문제 및 VoIP 스팸이나 도청 같은 기존에 없었던 새로운 형태의 보안이슈들이 많이 발생할 것으로 예상한다. 본 논문에서는 VoIP 신규 보안 위협을 분석하고, 분석된 보안 위협을 바탕으로 VoIP 공격 패킷 발생 도구를 구현하여 실제 공격 시 기존 보안 장비 시스템의 대응 여부에 대해서 기술하고자 한다.
저온 분자선 에피택시법을 이용한 GaMnAs 자성반도체 성장 및 특성 연구
박진범,고동완,박용주,오형택,신춘교,김영미,박일우,변동진,이정일,Park Jin-Bum,Koh Dongwan,Park Young Ju,Oh Hyoung-taek,Shinn Chun-Kyo,Kim Young-Mi,Park Il-Woo,Byun Dong-Jin,Lee Jung-Il 한국재료학회 2004 한국재료학회지 Vol.14 No.4
The LT-MBE (low temperature molecular beam epitaxy) allows to dope GaAs with Mn over its solubility limit. A 75 urn thick GaMnAs layers are grown on a low temperature grown LT-GaAs buffer layer at a substrate temperature of $260^{\circ}C$ by varying Mn contents ranged from 0.03 to 0.05. The typical growth rate for GaMnAs layer is fixed at 0.97 $\mu\textrm{m}$/h and the V/III ratio is varied from 25 to 34. The electrical and magnetic properties are investigated by Hall effect and superconducting quantum interference device(SQUID) measurements, respectively. Double crystal X-ray diffraction(DCXRD) is also performed to investigate the crystallinity of GaMnAs layers. The $T_{c}$ of the $Ga_{l-x}$ /$Mn_{x}$ As films grown by LT-MBE are enhanced from 38 K to 65 K as x increases from 0.03 into 0.05 whereas the $T_{c}$ becomes lower to 45 K when the V/III ratio increases up to 34 at the same composition of x=0.05. This means that the ferromagnetic exchange coupling between Mn-ion and a hole is affected by the growth condition of the enhanced V/III ratio in which the excess-As and As-antisite defects may be easily incorporated into GaMnAs layer.
관절내 종골 골절에 대해 AO 종골 금속판을 이용한 수술적 치료 결과
김성택,윤태현,박진범,이준영,Kim, Seong-Tek,Youn, Te-Hyun,Park, Jin-Bum,Lee, Jun-Young 대한족부족관절학회 2009 대한족부족관절학회지 Vol.13 No.1
Purpose: To evaluate the outcomes of intra-articular calcaneal fractures treated using AO calcaneal plate surgically. Materails and Methods: Total 15 cases of intra-articular calcaneal fracture that treated with open reduction and internal fixation using AO calcaneal plate were evaluated. The patients were followed over a mean period of 19.8 months. The mean age was 41.6 years. By Sanders classification, there were 2 cases of type II, 10 cases of type III, and 3 cases of type IV. We evaluated radiological outcomes by Bohler angle, Gissane angle, calcaneal hight, calcaneal width and clinical outcomes by Creighton-Nebraska health foundation score. Results: All fractures united at a mean duration of 13.3 weeks. Radiologically, the mean preoperative Bohler angle was $8.5^{\circ}$ and restored to $23.3^{\circ}$. The mean preoperative Gissane angle was $118.7^{\circ}$ and restored to $124.2^{\circ}$. The mean preoperative calcaneal hight was 30.8 mm and restored to 38.9 mm. The mean preoperative calcaneal width was 41.3 mm and restored to 35.3 mm. 10 cases had excellent and good clinical outcomes and 5 cases having fair outcome. Conculsion: In our study, open reduction and internal fixation using AO calcaneal plate showed good results with anatomical restoration of articular surface and stable fixation without late collapse.
야구 선수 주관절의 통증과 골 변화에 대한 유병률 조사
임채준,김성택,김창윤,안기용,박진범,윤태현,Lim, Che-Joon,Kim, Seong-Tek,Kim, Chang-Yoon,An, Ki-Yong,Park, Jin-Bum,Youn, Te-Hyun 대한정형외과스포츠의학회 2007 대한정형외과스포츠의학회지 Vol.6 No.1
목적: 소년부터 성인까지의 야구 선수들의 주관절 손상의 빈도와 발생 양상 및 추이를 알아보고자 하였다. 대상 및 방법: 2004년 1월부터 12월까지 초등학교, 중학교, 고등학교 그리고 프로 야구 선수 각각 80명, 총 320명을 대상으로 설문 조사 및 양측 주관절의 전 후면과 측면 단순 방사선 촬영을 시행하였다. 결과: 모든 선수 군에서 주관절의 통증 부위와 골 변화가 내측에서 가장 많았으며 특히 내측 상과 골단 비후(Hypertrophy of medial epicondyle)가 많았다. 선수의 연령이 증가할수록 주관절의 방사선학적 변화가 증가하였으며 초등학교 선수 65%, 중학교 선수 82%, 고등학교 선수 85%, 프로 선수 88%에서 주관절의 골 변화가 나타났다. 결론: 야구 선수들의 주관절 골 변화는 연령이 증가할수록 많았으며 과거에 비해 증가하였다. Purpose: To evaluate the aspect of occurrence and transition of the elbow injuries in baseball players from childhood to adult. Materials and Methods: We had a survey and took the simple X-ray from the anteroposterior view and the lateral view of both elbows for subjects of total 320 baseball players. - each of 80 players in elementary school, middle school, high school, and professional baseball players between January and December in 2004. Results: The region of pain and the bony changes in elbow were the most frequent in medial side from all the groups of players. Especially, hypertrophy of medial epicondyle were the most numerous. As baseball players got older, the radiological changes of elbow were increased. The bony changes were found out 52 cases (65%) of the elementary school players, 66 cases (82%) of the middle school players, 68 cases (85%) of the high school players and 70 cases (88%) of the professional players out of the total 320 baseball players. Conclusion: The bony changes of the elbow in baseball players got frequent as they were getting older and increased in comparison with past.
송성환(Sung-hwan Song),권성훈(Seong-hoon Gwon),박진범(Jin-bum Park),이형진(Hyung-jin Lee) 한국경영과학회 2009 한국경영과학회 학술대회논문집 Vol.2009 No.5
Becoming larger, convergence, and high technology of R&D, it has been changed to adopt the Cyberinfrastructure which is the next-generation research environment. Korea has devised the establishment plan of a supporting center for utilizing the mass research facilities and their mass experiment data. The Mass Experiment Data Center supports data-intensive basic science researches with security of experiment data of mass research facilities which is difficult to be accessed and built. This study analyzes economic effect of the center using cost-benefit analysis. Due to characteristics of the service, the benefit is calculated from the cost reduced by establishment of the center. This economic analysis is the first study to make possible to examine the value of the center quantitatively. It is expected to be a principal basis for direction of foundation and management of Korean Cyberinfrastructure
송성환(Sung-hwan Song),권성훈(Seong-hoon Gwon),박진범(Jin-bum Park),홍순기(Soon-ki Hong) 한국경영과학회 2009 經營 科學 Vol.26 No.1
AHP is widely used in various fields owing to its simplicity and clarity. However, it has the problems of reliability of panel's judgement and the assumption that each panelist's ability is equal. In this paper, we propose a reliable AHP method using Delphi technique, which aims to incorporate the relative expertise of panel and to increase their consensus. The method is called the Modified Delphi-AHP. We apply the method to analyzing the demand for lectures of Management of Technology.
송성환(Sung-hwan Song),권성훈(Seong-hoon Gwon),박진범(Jin-bum Park),이형진(Hyung-jin Lee) 대한산업공학회 2009 대한산업공학회 춘계학술대회논문집 Vol.2009 No.5
Becoming larger, convergence, and high technology of R&D, it has been changed to adopt the Cyberinfrastructure which is the next-generation research environment. Korea has devised the establishment plan of a supporting center for utilizing the mass research facilities and their mass experiment data. The Mass Experiment Data Center supports data-intensive basic science researches with security of experiment data of mass research facilities which is difficult to be accessed and built. This study analyzes economic effect of the center using cost-benefit analysis. Due to characteristics of the service, the benefit is calculated from the cost reduced by establishment of the center. This economic analysis is the first study to make possible to examine the value of the center quantitatively. It is expected to be a principal basis for direction of foundation and management of Korean Cyberinfrastructure