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한기훈,이영렬,Han, Gi-Hun,Lee, Yeong-Ryeol 한국통신학회 2007 정보와 통신 Vol.24 No.6
ITU-T VCEG과 ISO/IEC MPEG의 공동작업으로 만들어진 H.264/AVC는 기존의 비디오 압축표준들과 비교할 때 동일한 화질에서 비트율을 약 $30{\sim}70%$정도 절감할 수 있어 많은 비디오 스트리밍 서비스 장치에서 사용되고 있다. 또한 네트워크 대역폭과 관련 하드웨어의 발달, 언제, 어디서나 고화질의 비디오를 보고자 하는 사용자의 욕구 등으로 RTP를 이용한 H.264/AVC 전송이 빈번해 질것으로 예상된다. 본 논문에서는 H.264/AVC 전송을 위한 RTP포맷을 살펴본다.
한기훈(Han Kihoon),한청용(Han Cheng Yoong) 인하대학교 스포츠과학연구소 2003 스포츠과학논문집 Vol.15 No.-
Our adolescents, despite of its importance, cannot build their own healthy recreation culture and they have the distorted forms of recreations due to several factors which restrain their recreation activities. Therefore we need to find out how they spend their spare time through sports and leisure activities and what kinds of problems are lie in it in order to offer basic data of adolescents' recreational activities and build up their characters. This study surveyed and analyzed actual conditions of their recreation activities. And the purpose of the study was to offer basic data which might help adolescents to build their own healthy recreation culture and to give teachers guiding data for recreation education. As the result of the survey and analysis, it is necessary to assign more recreation time to students and to take recreation education actively through normalizing school system. Following conclusions are made from the study. 1) It must be analyzed why adolescents don't take part in sports and leisure activities. Then adolescents' participation in them should be encouraged. 2) We should teach teenagers the necessities of doing sports and leisure activities at home, in school and in society to understand the recreation newly. 3) Most adolescents spend tim~ in sports and leisure activities twice a week and less than one hour a day, showing the amount of exercise is lacking. Especially, as they move to the upper grade, the amount of time for sports and leisure was decreased. 4) About 80% of students have thought that they don't have the sufficient amount of time for indoor and outdoor sports due to too many school works. Therefore school curriculum must be reconsidered. 5) Cultivating friendship motivates adolescents to recreate themselves with sports and leisure activities. For that reason, sports and leisure activities which can be enjoyed with their friends should be developed and publicized. 6) Adolescents do sports and leisure activities in a passive way because of their personalities, game rules and boredom. Hence the schooling of them must be required. 7) Because of the scarcity of facilities, most adolescents enjoy sports and leisure activities in school. Accordingly, we must deliberate on expanding facilities, cutting down on the rental fees.
DCT 제어기 설계 및 검증을 위한 HIL 기반의 시험 자동화 시스템 구축
한기훈(Kihoon Han),주희훈(Heehun Ju) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
DCT system is innovational transmission system. But because of complexity of DCT system, model based development is essential for DCT TCU function development. Also, new validation system is necessary to reduce development / validation cycle time and cost. This study suggests the a HIL(Hardware-In-the-Loop) simulator, which can validate DCT TCU system, and HIL based automated test process. This system can not only reduce the development/validation cycle time and cost but also ensure more reliable vehicle quality. This automated test process makes possible to perform tests that require critical timing, hazardous environment, complex scenario and repetitive practice under various conditions. And we can obtain more reliable test results, as well as validation cycle time is reduced and the quality of vehicle is improved.
복합 운동이 비만 중년성인의 건강변인에 미치는 효과에 대한 메타분석
한기훈(Han, Ki-Hoon),김영욱(Kim, Young-Wook) 한국사회체육학회 2017 한국사회체육학회지 Vol.0 No.68
The aim of this study is to analyze the effect of exercise programs through the meta-analysis of the influence of combined exercise by obese middle-aged adults on health-related parameters. For the analysis of the data, 38 preceding studies were selected to analyze the effect of the combined exercise program and meta-analysis was conducted by using the CMA3.0 program. The findings of the study are as follows: First, a total of 38 effect sizes were calculated and the overall effect size of the combined exercise was .810, indicating a large effect size. Second, according to the sub-analysis based on the health variables of composite exercise, all health variables had a moderate effect size. Specifically, participating in combined exercise had a strong effect on BMI, body fat percentage among the sub-factors of body composition as well as cardiopulmonary endurance among the sub-factors of fitness. In addition, Adiponectin Insulin, HOMA-IR, TNF-a, Leptin, LDL-C and Glucose had a significant effect on blood variables. Third, for obese middle-aged adults, working out in the order of resistance exercise after aerobic exercise at least 4 times per week for a minimum 60 minutes a day for a period of 10 weeks or more was effective.
노면 경사도 추정 기법을 이용한 CVT 최적 정속 주행 제어 기법에 관한 연구
한기훈(Kihoon Han),이동진(Dongjin Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Estimation of longitudinal load such as road slope and rolling resistance is essential for precise cruise control of automotives. In this paper, using model based road slope estimation method with gravity sensor, precise longitudinal dynamic model of automotive vehicle is presented for vehicle auto-cruise control. Continuously Variable Transmissions (CVT) can cover a wide range of ratios and shift the engine operating points for a certain demanded power towards higher loads and lower speeds. This makes it possible to operate a combustion engine in more efficient working points than stepped. With this merit, fuel optimal cruise control by CVT ratio control is possible using precise longitudinal dynamic model using model based road slope estimation.