FD-CD 트랜스코팅기법에서 CD에 의한 전파/누적 왜곡의 분석과 모델링

김진수,김재곤,김형명,홍진우,Kim Jin soo,Kim Jae Gon,Kim Hyung Myung,Hong Jin Woo 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.12C

최근에 FD(frame Dropping)-CD(Coefficient Dropping) 트랜스코딩기법은 계산량을 줄이고, 손쉽게 구현할 수 있다는 측면에서 주목을 받고 있다. 그러나, 기존의 기법에서는 CD로 인하여 발생되는 왜곡 특성이 GOP내의 부호화 의존성을 갖는 프레임의 복호화 영상 품질에 전파 및 누적되는 성질을 고려하고 있지 않다. 본 논문에서는 CD로 인하여 발생되는 왜곡을 수식적으로 분석하고, CD왜곡이 전파/누적됨을 모의실험을 통하여 분석한다. 또한, 실험직인 결과에 기초하여, CD에 의한 전파/누적 왜곡 특성을 지수 감소함수 형태로 모델링한다. 모의실험을 통하여, 제안된 모델은 CD로 인해 초래되는 전체 누적왜곡 크기를 잘 예측할 수 있음을 보인다. Recently, FD (Frame Dropping)-CD (Coefficient Dropping) transcoding is considered due to the low computational complexity and simple implementation. The conventional FD-CD transcoding schemes have not considered the CD errors that tend to be propagated and accumulated. In this paper, we derive the error characteristics incurred by the CD errors and, through computer simulations, we show that the CD errors are propagated and not negligible to the decoded qualities of the next frames within single GOP. Then, we propose an exponential-decaying model that describes well the characteristics of propagation/accumulation errors. Finally, it is shown that the proposed model can be effectively used for estimating the overall distortions incurred by the CD errors.

하악 과두 과형성증에 관한 방사선학적 연구

김진수,김영진,최의환,김재덕,Kim Jin-Soo,Kim Young-Jin,Choi Eui-Hwan,Kim Jae-Duk 대한영상치의학회 1995 Imaging Science in Dentistry Vol.25 No.2

Condylar hyperplasia is a self-limiting condition characterized by a slowly progressing, enlargement of the mandible that results in facial asymmetry and a crossbite malocclusion. The facial asymmetry, open bite or crossbite, and radiographic evidence of an enlarged condyle confirm the diagnosis of condylar hyperplasia. The etiology of the condition is unknown. This condition usually first becomes apparent during the second decade of life, when one condyle continues to grow while the other is no longer active. Radiographically, the condyle may appear enlarged or the neck of the condyle maybe elongated or both may occur, Sometimes, however, no radiographically demonstrable condylar abnormality will be noted. Surgical correction with subcondylar osteotomy is the treatment of choice. We have observed two cases of condylar hyperplasia occurred in the left mandibular condyle of 24-year-old and 35-year-old women. We obtained that two cases were shown the followed results; 1. Clinically, both cases was unilaterally developed on C/C area, with temporomandibular disorders and pain, facial asymetry and malocclusion. 2. Radiographically, hyperplastic mass confined to the condyle. 3. Histopathologically, these cases shown increased hypertrophic region in parts, and lamellated bone with irregular trabeculae.

실린더에 존재하는 축방향 표면균열에 대한 공학적 J-적분식 (I) - 변형소성에 기초한 방법-

김진수,김윤재,박영재,김영진,Kim, Jin-Su,Kim, Yun-Jae,Park, Yeong-Jae,Kim, Yeong-Jin 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.8

This paper provides an engineering J estimation equation for cylinders with finite internal axial surfacecracks under internal pressure. The proposed equation is the J estimation equation based on deformation plasticity using Ramberg-Osgood (R-O) materials. Based on detailed 3-D FE results using deformation plasticity, plastic influence functions for fully plastic J components are tabulated for practically interesting ranges of the mean radius-to-thickness ratio, the crack depth-to-length ratio, the crack depth-to-thickness ratio. the strain hardening index for the R-O material, and the location along the semi-elliptical crack front. Based on tabilated plastic influence functions, the J estimation equation along the crack front is proposed and validated for R-O materials. Good agreements between the FE results and the proposed J estimation provide confidence in the use of the proposed method to elastic-plastic fracture mechanics of pressurized piping.

전방락킹, 후방락킹 운동 및 MET(Muscle Energy Techniques)를 이용한 Sway-back 자세 환자의 치험 3례

김진수,김종수,김정원,추원정,남항우,김창연,Kim, Jin-Soo,Kim, Jong-Su,Kim, Jung-Won,Choo, Won-Jung,Nam, Hang-Woo,Kim, Chang-Yeon 척추신경추나의학회 2012 척추신경추나의학회지 Vol.7 No.1

Sway-back 자세를 가진 환자 3례에 전방락킹, 후방락킹 운동 및 MET를 이용하여 치료한 결과 Whole spine X-ray(lateral)상의 척추만곡각도 및 NRS score의 호전을 확인하였다. 이에 저자는 본 증례를 보고하는 바이다. Objectives : The purpose of this study is to investigate the clinical application of Rocking forward, Rocking backward Exercise and MET(Muscle Energy Techniques) to three patients who had sway-back posture. Methods : Three patients diagnosed as sway-back posture, not have discogetic pain, were hospitalized Bu-Chun Jaseng hospital of Oriental Medicine about 20 days and they were treated by Rocking forward, Rocking backward Exercise and MET. To measure the outcome of the patients' improvement, we observed the X-ray of Whole spine and Numerical Rating Scale(NRS). Results : After being treated by Rocking forward, Rocking backward Exercise and MET, the patients' posture was significantly improved and the pain was reduced. The X-ray of Whole spine became almost normal and the improvement of patients' in the NRS score was detected. Conclusions : These results suggest that Rocking forward, Rocking backward Exercise and MET were effective treatment on patients who had sway-back posture.

T-DMB/AT-DMB 비디오 서비스를 위한 스케일러블 부호화기 모델에 따른 복잡도 및 성능 분석

김진수,김규석,김필중,이시웅,김재곤,최해철,Kim, Jin-Soo,Kim, Kyu-Seok,Kim, Pil-Joong,Lee, Si-Woong,Kim, Jae-Gon,Choi, Hae-Chul 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.11

본 논문에서는 고품질-DMB(Advanced Terrestrial-DMB) 비디오 서비스를 제공하기 위해 SVC(Scalable Video Coding) 부호화기 법을 다룬다. SVC 기저계층으로 T-DMB 서비스와 호환이 되도록 하면서, 향상계층은 공간 확장성을 통하여 AT-DMB 비디오 서비스를 제공할 수 있다. 그러나 SVC 부호화 기법은 매우 복잡하므로, 이를 구현하기 위해서는 SVC 부호화기의 복잡도에 따른 성능 분석이 필요하다. 본 논문에서는 SVC 부호화 파라미터에 따른 성능 변화를 조사하고, 이를 기반으로 3가지 부호화기 모델에 따른 복잡도 및 성능 특성을 모의실험을 통하여 비교 분석한다. This paper presents the SVC(Scalable Video Coding) scheme which enables the AT-DMB(Advanced Terrestrial-DMB) video service in enhancement layer, while keeping the current T-DMB video service in base layer. But, it is very complicate to implement the SVC encoder and so it is necessary to analyze the complexity and performance for SVC encoder#s structures and coding parameters. In this paper, through computer simulations, SVC coding parameters are tested and then, based on these results, three types of SVC encoder models are compared from the viewpoint of the complexity and performance.

학교 이전적지의 적정활용 방안에 관한 연구 - 서울시 은평구 'A' 초등학교를 중심으로 -

김진수,김창신,김현호,동재욱,이화룡,Kim, Jin-Su,Kim, Chang-Shin,Kim, Hyoun-Ho,Dong, Jae-Wook,Lee, Hwa-Ryong 한국교육시설학회 2011 敎育施設 Vol.18 No.1

ent years, the change of urban function and the decrease in birth rate have given rise to merge, abolition and relocation of the existing schools. This study explores the possibilities for various land utilizations of relocated school sites, using the trial case of 'A' elementary school in Eun-pyeong gu, Seoul. 'A' elementary school has happened transfer plan due to the urban development project of the redevelopment area, Eun-pyeong gu in Seoul. Firstly, it studies the land use categories and the development methodologies of 7 relocated school sites happened in Seoul. In addition, it analyzes the land utilization after relocation, development principals, area, building usage and changes in land use regulation. Finally, it proposes the commercial exploitation of school site targeting 'A' elementary school site. Throughout the profit analysis, this study concludes that it is available to exploit the relocated school sites by the variety of development methodologies, especially in a metropolis like Seoul.

Open-label, Randomized Comparison of the Efficacy of Intravenous Dolasetron Mesylate and Ondansetron in the Prevention of Acute and Delayed Cisplatin-induced Emesis in Cancer Patients

김진수,Ji Yeon Baek,Sook Ryun Park,최인실,Sang-Il Kim,김동완,Seock-Ah Im,Tae-You Kim,허대석,Yung-Jue Bang,Noe Kyeong Kim 대한암학회 2004 Cancer Research and Treatment Vol.36 No.6

Purpose: The aim of this study is to compare the antiemetic efficacy and tolerability of intravenous dolasetron mesylate and ondansetron in the prevention of acute and delayed emesis. Material and Methods: From April 2002 through October 2002, a total of 112 patients receiving cisplatin- based combination chemotherapy were randomized to receive a single i.v. dose of dolasetron 100 mg or ondansetron 8 mg, 30 minutes before the initiation of chemotherapy. In the ondansetron group, two additional doses of ondansetron 8 mg were given at intervals of 2 to 4 hours. To prevent delayed emesis, dolasetron 200 mg p.o. daily or ondansetron 8 mg p.o. bid was administered from the 2nd days to a maximum of 5 days. The primary end point was the proportion of patients that experienced no emetic episodes and required no rescue medication (complete response, CR) during the 24 hours (acute period) and during Day 2 to Day 5 2 days (delayed period), after chemotherapy. The secondary end points included the incidence and severity of emesis. Results: 105 patients were evaluable for efficacy. CR rates during the acute period were 36.0% for a single dose of dolasetron 100 mg, and 43.6% for three doses of ondansetron 8 mg. CR rates during the delayed period were 8.0% and 10.9%, respectively. There was no significant difference in the efficacy between the two groups. Adverse effects were mostly mild to moderate and not related to study medication. Conclusions: A single i.v. dose of dolasetron 100 mg is as effective as three i.v. doses of ondansetron 8 mg in preventing acute and delayed emesis after cisplatin- based chemotherapy, with a comparable safety profile.(Cancer Res Treat. 2004;36:372-376)

서부 경남지역 토마토 농장에서의 위생 미생물의 분포

김진수,심원보,김지훈,김세리,정덕화,Kim Jin-Soo,Shim Won-Bo,Kim Ji-Hun,Kim Se-Ri,Chung Duck-Hwa 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.1

This study were conducted to investigate the microbial contamination level in 5 tomato farms in Western Gyeongnam. A total of 130 samples was examined for sanitary indicator bacteria, such as aerobic plate count (APC), coliforms, and Escherchia coli, and pathogenic bacteria such as E. coli O157:H7, Salmonella spp., Staphylococcus aureus, and Listeria monocytogenes. APC and coliform count ranged $0\~6.62\;and\;0\~4.52 log_{10}\;CFU/(ml,\;g,\;100\;cm^2,\;hand)$, respectively, and $32.5\%$ were contaminated with E. coli. Especially, most of the samples from employees are high as above $4.0\;log_{10}\;CFU/(ml,\;g,\;100\;cm^2,\;hand)$ in APC. S. aureus, detected at $10.7\%$, was found in employees' hands, irrigation water, and hydroponic solution. whereas E. coli $O157:H7$, Salmonella spp, and L. monocytogenes were not detected. These results will provide fundamental microbiological information for introduction of good agricultural practice (GAP)system in tomato farms.

시편두께 및 균열깊이 영향을 고려한 비표준시편의 J 시험법 및 구속효과의 정량화

김진수,조수만,김윤재,김영진,Kim, Jin-Su,Cho, Soo-Man,Kim, Yun-Jae,Kim, Young-Jin 대한기계학회 2003 大韓機械學會論文集A Vol.27 No.9

This paper compiles solutions of plastic $\eta$ factors and crack tip stress triaxialites for standard and nonstandard fracture toughness testing specimens, via detailed three-dimensional (3-D) finite element (FE) analyses. Fracture toughness testing specimens include a middle cracked tension (M(T)) specimen, SE(B), single-edge cracked bar in tension (SE(T)) and C(T) specimen. The ligament-to-thickness ratio of the specimen is systematically varied. It is found that the use of the CMOD overall provides more robust experimental J estimation than that of the LLD, for all cases considered in the present work. Moreover, the J estimation based on the load-CMOD record is shown to be insensitive to the specimen thickness, and thus can be used for testing specimen with any thickness. The effects of in-plane and out-of-plane constraint on the crack tip stress triaxiality are also quantified, so that when experimental J value is estimated according to the procedure recommended in this paper, the corresponding crack tip stress triaxiality can be estimated. Moreover, it is found that the out-of-plane constraint effect is related to the in-plane constraint effect.

이산사건 워게임 시뮬레이션을 위한 실시간 병렬 엔진의 설계 및 구현

김진수,김대석,김정국,류근호,Kim, Jin-Soo,Kim, Dae-Seog,Kim, Jung-Guk,Ryu, Keun-Ho 한국정보처리학회 2003 정보처리학회논문지 A Vol.10 No.2

군사용 워게임 시뮬레이션 모델들의 상호연동을 위해서는 국제표준연동(HLA : High Level Architecture)구조를 반드시 갖추어야하며 타 모델과 연동시 발생되는 시스템 오버헤드를 줄이기 위해서는 병렬 시뮬레이션 엔진 도입이 효과적이다. 그러나 기존 군사용 워게임 시뮬레이션 모델엔진의 이벤트 처리는 순차적 이벤트-드리븐 방식으로 처리하고 있다. 이는 병렬로 처리 시 글로벌 자료영역에 대한 동시참조등의 문제점들이 발생하기 때문이다. 아울러 기존 시뮬레이션 플랫폼으로 다중 CPU 시스템을 사용하여도 여러 개의 CPU를 다 활용하지 못하는 결과를 초래하고 있다. 따라서 이 논문에서는 군사용 워 게임 모델의 시스템 처리능력 향상과 글로벌 자료 영역에 대한 동시참조, 대외적인 시뮬레이션 시간처리, 장애 회복(Crash Recovery)시 병행 처리된 이벤트들의 순서를 보장 할 수 있는 객체모델에 기반한 병렬 시뮬레이션 엔진으로의 전환을 제안한다 이 전환된 병렬 시뮬레이션 엔진은 다중 CPU 시스템(SMP)상에서도 병렬 실행이 가능하도록 설계하고 구현하였다. Military wargame simulation models must support the HLA in order to facilitate interoperability with other simulations, and using parallel simulation engines offer efficiency in reducing system overhead generated by propelling interoperability. However, legacy military simulation model engines process events using sequential event-driven method. This is due to problems generated by parallel processing such as synchronous reference to global data domains. Additionally. using legacy simulation platforms result in insufficient utilization of multiple CPUs even if a multiple CPU system is under use. Therefore, in this paper, we propose conversing the simulation engine to an object model-based parallel simulation engine to ensure military wargame model's improved system processing capability, synchronous reference to global data domains, external simulation time processing, and the sequence of parallel-processed events during a crash recovery. The converted parallel simulation engine is designed and implemented to enable parallel execution on a multiple CPU system (SMP).