클라우드 시스템의 씬 클라이언트에서의 표시 지연 절감

강승수,고현,윤희용,Kang, Seung Soo,Ko, Hyun,Yoon, Hee Yong 한국정보처리학회 2013 정보처리학회논문지. 컴퓨터 및 통신시스템 Vol.2 No.4

클라우드 시스템을 이용하여 스트리밍 게임 서비스를 제공하는 것은 많은 유리한 점이 있지만, 씬 클라이언트에서 표시 지연(Presentation latency)이 발생한다는 문제점도 갖고 있다. 게임은 사용자의 입력에 즉각적으로 반응해야 하는 특성을 갖는 서비스이므로 씬 클라이언트에서의 표시 지연은 다른 이슈에 비해 중요한 문제이다. 본 연구에서는 서버와 씬 클라이언트 사이에서의 표시 지연을 감소시키는 방법을 제안한다. 이를 위해, 서버 단에서는 서버와 씬 클라이언트의 영상포맷 일치화, 미디어 타입에 따른 인코딩 포맷 변경, 동기화를 위해 주기적으로 클럭을 전송하도록 하는 것을 해결 방안으로 제안한다. 그리고 씬 클라이언트 단에서는 패킷화 과정에서 명령어 수 절감, 암호화 과정에서 가벼운 알고리즘 사용, 압축해제 과정에서 하드웨어 디코딩 개선을 해결 방안으로 제안한다. 이를 실제 상용화 수준까지 개발된 게임 서비스 시스템에 적용하여 검증 하였는데, 수백 ms 정도의 상당한 표시 지연 감소를 통해 허용 가능한 수준인 100ms까지 표시 지연 감소가 가능함을 확인하였다. Cloud-based streaming game service has numerous merits, but it may suffer from presentation latency in a thin-client. It is an important issue especially for game service which needs instantaneous response to user inputs. This research proposes the methods for reducing the presentation latency between the server unit and the thin-client unit. The approaches proposed to be employed with server unit include the source/sync video format equalization, encoding format configuration according to the media type, and the S/W implementation for transmitting clock periodically. The methods for the thin-client unit include the decreasing the number of instructions, use of light encryption algorithm, and improvement on H/W decoding. The proposed schemes are tested with a commercialized streaming service platform, which reveals the reduction of presentation latency as large as a few hundred milliseconds and reaches the acceptable level (about 100 milliseconds).

요가 요통체조와 요부 신전근 지구력 운동이 만성요통 환자의 통증에 미치는 영향

강승수,구봉오,Kang, Seung-Soo,Goo, Bong-Oh 대한물리치료학회 2012 대한물리치료학회지 Vol.24 No.2

Purpose: In the present study, the degree of subjective pain in chronic low back pain patients through the course of six week of yoga low back pain exercise and lumbar extensor muscle strengthening training was analyzed, and a systematic and effective home exercise therapy program was proposed. Methods: For this study, we sampled 21 random patients with chronic low back pain who were receiving outpatient treatment at G Hospital Pusan, and conducted experiment for six weeks by applying yoga low back pain exercise+modalities (7) lumbar extensor muscle endurance exercise+ modalities (7) and modalities (7). To measure the degree of pain, the visual analogue scale (VAS) and Oswestry Low Back Pain Questionnaire were used. Pain was measured before the experiment and after six weeks. Results: Significant differences were observed between yoga, extensor muscle endurance exercise and modalities (VAS=0.00 Oswestry=0.00). The yoga and extensor endurance muscle exercise reduced low back pain by more than the modalities. Conclusion: This study will be used to develop a preventive and reduction method of LBP. Therefore, Yoga and extensor muscle endurance exercise are appropriate for use as a home program exercise to reduce low back pain in patients.

환경에 따른 과제 지향적 일상생활동작 훈련이 만성 뇌졸중 환자의 일상생활에 미치는 영향

강승수 ( Seung Soo Kang ),구봉오 ( Bong Oh Goo ) 대한물리의학회 2013 대한물리의학회지 Vol.8 No.2

The purpose of this study was to investigate the effects of task oriented ADL exercise in different environments in patients with chronic stroke. Methods: A total of 28 patients with hemiplegia resulting from stroke were included in this study. The patients were randomized into two groups. The control group(n=14) was received neurodevelopment therapy + task oriented ADL exercise and experimental group(n=14) was received neurodevelopment therapy + home based task oriented ADL exercise for 30 minutes twice per week during 6weeks. A task oriented ADL exercise pretest and postest design was used examine the change of FIM(Functional Independent Measure) and K-MBI(Korea-Modified Bathel Index) at the completion of 6 weeks task oriented ADL exercise. Results: After 6 weeks, the experimental group compared with control group showed a significant improvement(p<.05) in FIM and K-MBI scores. Conclusion: The results indicate that the home based task oriented ADL exercise improves functions in the persons with chronic stroke.

모바일 장치와 공용 디스플레이 장치를 포함하는 환경에서 사용자의 특성에 기반한 Adaptive UI 설계 방안

강승수(Seung-Soo Kang),고현(Hyun Ko),윤희용(Hee Yong Youn) 한국IT서비스학회 2012 한국IT서비스학회지 Vol.11 No.4

The one of the most meaningful change in the recent ubiquitous environment is the omnipresence of public digital display device for providing ubiquitous information. It is the important issue to provide publicity as well as adaptive information to each user in the field of the public digital display device. This research proposes the idea ensuring fast response speed by the selection of user preference function. The preference function is selected by statistics using Zipf distribution in the system comprising mobile device and digital display device based on NFC (Near Field Communication). The idea is proved by CPM-GOMS model and the improvement of user response can be achieved.

논문집 : 태권도 코치의 리더십 유형이 선수 만족도에 미치는 영향

강승수 ( Seung Soo Kang ),이세형 ( Se Hyoung Lee ) 제주대학교 체육과학연구소 2002 체육과학연구 Vol.8 No.-

시뮬레이션 과제 수행이 뇌졸중 환자의 균형 능력에 미치는 효과

구봉오 ( Bong Oh Goo ),강승수 ( Seung Soo Kang ) 대한물리의학회 2010 대한물리의학회지 Vol.5 No.4

Purpose:This study was performed to examine the effect of stimulation task-oriented training on the balance ability of the hemiplegic patients caused by stroke. Methods:We made a random sampling of 25 hemiplegic patients caused by stroke. 10 patients (experimental group) were treated by simulation Task-oriented training and Conventional training used by balance pad. The other 10 patients (control group) were only treated by Conventional training used by balance pad. During the training, 3 patients from the experimental group and 2 patients from the control group were excluded by private affairs. The control group has done Conventional training 6 times a week for 6 weeks. And experimental group has done Simulation task-oriented training two times, conventional training four times a week for 6 weeks. Balance ability was assessed by Fuctional Reaching Test (FRT) : unilateral and bilateral reaching. Results:In comparison of FRT before and after training, two groups all was significantly improved(p<05). But bilateral reaching variation was significantly improved in experimental group. Conclusion:we can use simulation Task-oriented training valuably to increase balance ability of hemiplegic patients.

만성 C 형 간염 환자에서 인터페론치료에 의한 갑상선질환의 발생

김민대(Min Dae Kim),전익수(Ik Soo jeon),강승수(Seung Su Kang),엄재섭(Jae Sup Eum),손호성(Ho Seung Son),박현용(Hyung Lyong Park),윤병철(Byung Cheol Yun),이상욱(Sang Uk Lee),한병훈(Byung Hoon Han) 대한소화기학회 2001 대한소화기학회지 Vol.37 No.6

Background/Aims: It has been suggested that hepatitis C virus is associated with the autoimmune disease and interferon also induces hepatic and non-hepatic autoimmune reaction. We conducted this study to assess the effect of interferon-alpha (INF-α) on the induction of thyroid autoantibodies and clinical thyroid disease and to know whether the thyroid autoantibodies affect the IFN-α efficacy in patients with chronic hepatitis C. Methods: Twenty-nine patients with chronic hepatitis C were enrolled. Anti-thyroglobulin antibody (ATA), anti-microsomal antibody (AMsA), thyroid stimulating hormone and free thyroxine were measured before, during, and after IFN-α therapy. Results: Two of the 29 patients (6.5%) were positive for ATA and AMsA before IFN-α therapy. Of these two patients, one patient was a woman, who showed hyperthyroidism druing IFN-α therapy. Of the 27 patients who had been negative for ATA and AMsA, one female patient became ATA positive with the development of hyperthyroidism, and 3 male patients became AMsA positive during IFN-α therapy. There was no difference in the efficacy of INF-α therapy between the thyroid autoantibody positive and negative groups. Conclusions: IFN-α therapy induced thyroid disease with high prevalence in the patients with chronic hepatis C. Thus, thyroid status should be checked even in patients without thyroid autoantibodies, especially in woman. Antithyroid autoantibodies seem unlikely to affect the efficacy of IFN-α therapy. (Korean J Gastroenterol 2001;37:436-442)

다제약제내성 결핵의 유병율

김길수,전익수,신성훈,김민대,강승수,권성일,옥철호,조현명,장태원,정만홍 고신대학교 의학부 2001 高神大學校 醫學部 論文集 Vol.16 No.1

Background Multidrug-resistant tuberculosis (MDRTB) is defined as the reduction in susceptibility of Mycobacterium tuberculosis to Isoniazid and Rifampicin with or without resistance to additional drugs. The development of MDRTB is a big problem not only to the patients but also to the society given with its lower cure rate. The purpose of this study is to investigate the prevalence and the clinical features of MDRTB at university hospital and to establish the proper therapeutic plan. Method The incidence of MDRTB among 161 patients diagnosed as pulmonary tuberculosis by the AFB culture between January 1997 and June 2000, and the relationship of MDRTB with the history of previous therapy, associated diseases, bronchial involvement, and the consequence of treatment were studied retrospectively. Results Fortyeight (29.8%) patients were resistant to at least one drug and 27 (16.8%) patients suffered from MDRTB. Among the MDRTB patients, 22 had the previous history of therapy. More than 30 percent of all the patients had associated diseases, such diabetes mellitus, malignancy, chronic liver disease, systemic erythematous lupus or psychosis. Endobronchial lesions suggesting bronchial involvement of tuberculosis were found in 37 (35%) patients. Out of the 16 patients eligible for the efficacy of treatment among 27 MDRTB patients, nine (56.3%) patients were treated successfully but seven (43.8%) were failed. Conclusion Prevalence of MDRTB was high especially in patients with previous therapy history and the results of treatment was modest in this study. It is imperative to prevent the emergence of drug resistance by the proper delivery of chemotherapy and the development of new drugs.

13세 여아에서 발생한 담관낭종 합병의 담도암 1 예

이상욱,박재선,윤병철,김성만,한병훈,정한호,강승수,권기범 대한소화기내시경학회 2000 Clinical Endoscopy Vol.21 No.4

Choledochal cyst, also referred to as cystic dilatation of the extrahepatic bile duct, is a rare malformation most frequently seen in female. Malignant changes in choledochal cyst have frequently been described, but only one case of malignant change in childhood has been reported till now. Recently, we experienced a case of bile duct cancer arising in choledochal cyst in a 13-year-old girl. She had been complaining of right upper abdominal pain for 15 days. Abdominal CT scan and ERCP showed a cylindrical dilatation of extrahepatic bile duct with irregular cystic wall mass and multiple liver metastasis which was confirmed as adenocarcinoma by ultrasono-guided needle biopsy. Anomalous pancreaticobiliary ductal union was not seen. This patient was the youngest case of bile duct carcinoma arising in choledochal cyst in Korea.