고속 움직임 추정을 위한 시공간적 상관관계 기반의 효율적인 부분 왜곡 탐색 알고리즘

하동원(Dong Won Ha),조효문(Hyo Moon Cho),이종화(Jong Hwa Lee) 大韓電子工學會 2010 電子工學會論文誌-SD (Semiconductor and devices) Vol.47 No.1

H.264/AVC와 같은 영상압축표준에서 움직임 추정 및 보상은 비디오 코딩 과정에서 가장 많은 연산량을 차지하는 중요한 처리과정이다. 영상 코덱에서 일반적으로 사용되는 전역 탐색 기법(Full Search)은 가장 좋은 화질을 보여주긴 하지만 매우 많은 계산량이 필요하다는 단점이 있다. 따라서 좋은 화질을 유지하면서도 계산량을 낮추기 위한 많은 고속 알고리즘들이 제안되었다. 그 중 NPDS(Normaized Partial Distortion Search)는 개선된 블록 정합 오류 연산을 이용하여 계산량을 낮추면서도 전역 탐색 기법에 거의 근접한 화질을 얻어 낼 수 있었다. 본 논문에서는 움직임 예측 벡터를 이용하여 초기에 최소 정합에러를 결정하고, 새로운 탐색 순서를 적용한 알고리즘을 제안한다. 실험결과에 따르면 제안하는 알고리즘은 기존의 전역탐색 알고리즘에 비해 비교적 화질열화가 없고 계산량이 평균적으로 약 95% 감소하는 것을 확인할 수 있었다. In video standards such as H.264/AVC, motion estimation (ME) / compensation (MC) is regarded as a vital component in a video coder as it consumes a large amount of computation resources. The full search technique, which is used in general video codecs, gives the highest visual quality but also has the problem of significant computational load. To solve this problem, many fast algorithm has benn proposed. Among them, NPDS show that can maintain its video quality very close to the full search technique while achieving computation reduction by using a halfway-stop technique in the calculation of block distortion measure. In this paper, we proposed algorithm by determining minimum distortion measure with predictive motion vector and using the new search order. As the result, we can check that the proposed algorithm reduces the computational load 95% in average compared to the full search, respectively with the PSNR lost about 0.04㏈.

광역관광개발의 지역 간 네트워크 분석

하동원(Ha Dong Won) 한국지역개발학회 2012 韓國地域開發學會誌 Vol.24 No.3

The aim of this paper is to analyze empirically structure of network among regions where progress multi-region tourism development. The sample was drawn from 23 regions which included in Namhaean tourism-belt. UCINET6.0 as social network analysis program was used to analyze density, centrality and structure hole of network among regions. The result of analysis as follows. First, real network emerged from low cooperation stage in the multi-region tourism development. Second, the result of analysis showed that the network was at an early stage. Third, hub region exists in the multi-region tourism development. Forth, The outcome suggested that geographical accessibility was important variable. Fifth, network among regions which have the similar type of resources was very strong. Finally, regions have to contact more various regions for advantageous position in the multi-region tourism development. In conclusion, the result of this paper implies the method how the central government and the local government develop tourism of regions using analysis of network structure in the multi-region tourism development.

조기에 재발한 미세낭종성 뇌수막종 -증례보고-

하동원 ( Dong Won Ha ),김세혁 ( Se Hyuk Kim ),신용삼 ( Yong Sam Shin ),안영환 ( Young Hwan Ahn ),윤수한 ( Soo Han Yoon ),조기홍 ( Ki Hong Cho ),조경기 ( Kyung Gi Cho ),임현이 ( Hyun Yee Lim ) 대한뇌종양학회·대한신경종양학회·대한소아뇌종양학회 2005 대한뇌종양학회지 Vol.4 No.2

We report a case of microcystic meningioma which showed unusual radiological findings resembling malignant tumor. A 44-year-old woman presented with generalized tonic clonic seizure and right hemiparesis. Computed tomography and magnetic resonance images showed a mass at left frontal, parasagittal area with septa-like enhancement and surrounding edema. 201Tl SPECT showed focal uptake in mass lesion which suggests the malignant tumor. The histopathological findings of this tumor revealed to be a microcystic meningioma and Ki-67 labeling index was 3.8. Although the mass was a subtype of meningioma, it showed a early recurrence 10 months after grossly total resection because of high proliferative index. We suggest that the biological behaviour in addition to morphologic classification should be considered in the management of benign brain tumor, such as meningioma.

축제 공간의 복잡적응계적 현상과 진화

하동원(Dong Won Ha),김현정(Hyun Jung Kim) 한양대학교 관광연구소 2013 觀光硏究論叢 Vol.25 No.4

본 연구는 축제공간을 복잡적응계로 간주하고 축제공간의 복잡적응계적 관점에서 축제의 현상을 파악하고 축제 공간 참여자의 행동을 이해하는데 목적이 있다. 복잡 적응계의 구성요소 중에서 자기조직화와 공진화의 개념을 사용하여 축제 공간에서 축제 참여자 간 행동의 상호작용을 분석하였다. 연구결과, 축제공간에서 참여자의 미시적 행동의 상호작용에는 복잡적응계적 현상이 나타났으며 진화의 가능성도 있었다. 복잡적응계적 현상으로 자기조직화가 나타났는데, 이는 창발성, 자기유사성, 양의 피드백, 이상한 끌개로 확인되었다. 또한, 진화의 가능성은 공진화의 개념을 사용하여 확인되었다. 본 연구의 결과는 축제공간과 그 속의 참여자의 행동을 이해하는데 있어 새로운 이론적 틀을 제공하고, 축제기획 및 운영, 마케팅에 실무적인 시사점을 제공할 것이다. The aim of this paper is to analyze phenomenon of festival in point of Complex Adaptive System(CAS) and to understand participant behavior in the festival place. Using the concept of self-organization and co-evolution of CAS`s component, the study examined interaction of behaviors among festival participants. As a result of this paper, CAS phenomenon appeared in the festival place and there were possibilities that festival place evolves. This paper identified emergent properties, self-similarity, positive feedback, strange attractor as a self-organization. Possibility of evolution was found by using the concept of co-evolution. In conclusion, this paper suggest new theoretical frame to understand behaviors among festival participants and practical implication for festival plan, operation and marketing.

광역관광개발에서 관광개발 자원의존 특성이 지방정부간 협력에 미치는 영향

하동원(Dong Won Ha),최승담(Seung Dam Choi) 한국관광연구학회 2015 관광연구저널 Vol.29 No.5

The purpose of this study is to analyze the relationship of tourism development resource dependency of local government, trust and collaboration among local governments in the multi-regional tourism development within the framework of Resource Dependency Theory. Based on literature review, conceptual model which composed of resource dependency characteristics(independent variable), collaboration among the local governments(dependent variable) and trust among the local governments(moderate variable) was developed and 7 hypotheses were formulated to test the model. H1~5 explain how possession, importance, discretion, substitutability and connection of resources affect collaboration among local governments, and H6, H7 explain the roles of trust among local governments as a moderating variable associated with H1~5. This survey was conducted targeting the public officials in charge of Jirisan multi-regional tourism development. The results showed the effects of possession, importance, substitutability and connection on collaboration was significant, and the moderating effect of trust was significant between possession, importance, discretion, substitutability and connection of resources. Concrete results as follows. While the possession and importance of resource among the five factors have a negative effect on tourism development collaboration, substitutability and connection of resources have a positive effect on that one. From the perspective of resource dependency theory, the effects of possession and connection of resource on collaboration seem to fit into the theory. This study presents a theoretical significance extending the resource dependence theory in tourism development perspective and the policy implications for improving local government collaboration in multi-regional tourism development policy decisions.

게임콘텐츠를 이용한 정신장애인의대인관계능력 향상의 효과 연구

이연숙 ( Lee Yeon-sook ),하동원 ( Ha Dong-won ) 한국디자인트렌드학회 2008 한국디자인포럼 Vol.18 No.-

본 논문은 소외계층인 정신장애 치료에 대해 디지털 기술이 기여할 수 있는 바를 게임 콘텐츠 분야를 중심으로 진행하였다. 앞으로 정신장애 중에서 정신증 환자들은 사회가 복잡해지고 다양해질수록 그 수는 더욱 늘어날 것으로 예측된다. 하지만 이에 대한 연구가 미비하며, 게임의 가능성을 정신장애의 치료와 연결시킨 기능성 게임에 대한 연구도 전혀 없는 상황이다. 이러한 현실에서 디지털 게임 원래의 목적인 재미와 즐거움의 요소에 또 다른 측면이 더해진 기능성게임 개발이 필요하다. 치료용 기능성 게임은 현실과 유사한 가상의 공간에서 장애자들이 반복, 훈련, 학습을 통해 일상을 선(先)경험을 함으로서 정신장애의 원인인 욕구와 결핍을 해소 할 수 있는 치료에 적합한 매체이다. 본 연구의 타당성을 위해 서울시 신길동에 있는 사회복지 재단에서 정신증 환자를 대상으로 실험 하였으며 이러한 결과 정신장애인 중 정신증 환자의 치료에 디지털 게임이 효과가 있음을 입증하였다. Culture contents industry has changed traditional industry paradigm owe to digital information technology development. Digital game has developed owe to personal computer supply and computer graphics development. However, game industry, the core of culture contents industry, has been developed too much emphasis on consumption and hobby. I studied therapyfor the disturbed with digital technology within game contents field. As a society as complicated and diverse, psychosis patients will be growing fast. However, there are few studies on game for the disturbers healing. In the real world, we need functional games addition to their fun and pleasure as nature. Functional game is a proper medium that the disturbed can be recovered from their disease. In virtual space, the disturbed can be cured their over or less feelings through repetition, training, and education. For this study`s adequacy,I made an experiment on neurosis patients at a social welfare foundationin Singil-dong, Seoul. The result of experiment proves that the digital game is effective on the remedy of neurotic patients.