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박재석 ( Jaeseok Park ),정재권 ( Jaekwon Jung ),김현수 ( Hyunsoo Kim ),박창근 ( Changkeun Park ),김대진 ( Daejin Kim ),이재광 ( Jaekwang Lee ),류한준 ( Hanjun Ryu ) 대한내과학회 2021 대한내과학회지 Vol.96 No.2
On 11 February, 2020, the World Health Organization announced that COVID-19 was a novel coronavirus disease first detected in Wuhan, Hubei Province, China. COVID-19 is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The complete clinical picture is not fully known. Illness ranges from mild to fatal. The common symptoms include fever, cough, and dyspnea usually developing 2-14 days after exposure. However, diarrhea was present in a few patients with COVID-19. We report a case of COVID-19 mimicking acute colitis. (Korean J Med 2021;96:143-146)
데이터 스트림에 대한 연속 질의를 위한 우선순위 기반의 의미적 부하 제한
박재석(Jaeseok Park),조행래(Haengrae Cho) 한국정보과학회 데이터베이스 소사이어티 2005 데이타베이스 연구 Vol.21 No.1
데이터 스트림 관리 시스템(Data Stream Management System: DSMS)은 대량의 데이터 스트림과 다수의 연속 질의를 처리하는 시스템이다. 시스템에 입력되는 데이터 스트림의 양이 시스템의 처리 능력을 초과할 경우, DSMS는 입력 데이터의 일부를 무시함으로써 적정 부하를 유지한다. 기존에 연구된 데이터 스트림에 대한 질의 알고리즘들의 공통적인 목표는 모든 질의 결과들 사이의 평균 오차를 줄이는 것이다. 이와는 달리 본 논문에서는 각 질의의 우선순위를 고려하여 중요한 질의일수록 신빙성 있는 결과를 출력하는 부하 제한 알고리즘을 제안한다. 즉, 본 논문에서 제안하는 알고리즘은 질의를 실행하는 각 응용들의 중요도를 반영하여 차별화된 QoS(Quality of Service)를 지원할 수 있다. 본 논문에서는 모의실험을 통해 제안하는 알고리즘의 성능을 평가한다. The data stream management system (DSMS) has to handle high-volume and bursty data streams with large number of continuous queries. When the input rate of any data stream exceeds the system capacity, the DSMS has to shed load by dropping some fraction of the unprocessed data items. This paper proposes a new load shedding algorithm for queries over data streams. Unlike previous algorithms that try to reduce the average deviation of the estimated answers of all queries, the proposed algorithm considers the priority of each query so that more important queries can make more convincing outputs. As a result, the proposed algorithm can support differentiated quality of services by exploiting semantics inherent to applications. We also report the experiment results confirming the benefits of the proposed algorithm.
박재석(Jaeseok Park),원유집(Youjip Won),이모원(Mowon Lee),이주훤(Joowheun Lee),김영진(Youngjin kim),김락기(Rakki Kim) 대한전자공학회 2006 대한전자공학회 학술대회 Vol.2006 No.11
In this paper, we propose robust file structure and file recovery for multimedia application. First, file for multimedia application is large file. So multimedia file has many indirect block but safeness for indirect block is not enough. So we replicate indirect block. And if bad block occur in indirect block we recover by copying secondary indirect block information to primary indirect block. Then HDD remap bad block to spare block and we can use primary indirect block Second, bad block in file area is critical for real-time multimedia application. And small loss is bearable if bad block occur we use force writing bad block area. Then small losses are occurred. But we can use file smoothly without read-fail. We evolve multimedia file system with indirect block replication and recovery with force writing.
박재석(Jaeseok Park),양명훈(Myunghoon Yang),김용준(Yongjoon Kim),박영규(Youngkyu Park),윤현준(Hyunjun Yoon),강성호(Sungho Kang) 대한전자공학회 2008 電子工學會論文誌-SD (Semiconductor and devices) Vol.45 No.9
본 논문은 높은 압축 성능을 가진 테스트 데이터 압축 기법을 제안한다. 제안하는 기법은 돈 케어 리맵핑을 이용한 천이 추가 단계와 천이 이전 단계로 구성된다. 실험 결과는 새로운 기법이 가장 높은 성능의 기법들 중 하나인 RL-huffman보다 높은 압축률을 제공하고 더 작은 하드웨어 면적을 필요로 함을 보여준다. 따라서 이 기법은 테스트 데이터 압축을 위한 실제적인 해법으로 널리 쓰일 수 있다. This paper proposes a new test data compression scheme which has good performance. The proposed scheme is composed of adding transition stage and shifting transition stage using don't care remapping technique. The experimental results show that the new scheme provides higher compression ratio than RL-huffman encoding which is the one of the highest performance schemes, and requires smaller hardware overhead. Therefore it can be widely used as a practical solution for test data compression.
에드워드 사이드와 유종호의 접점 찾기 : 인문주의(人文主義)의 지평 확장을 위하여
박재석 ( Park Jaeseok ) 국제비교한국학회 2020 비교한국학 Comparative Korean Studies Vol.28 No.1
The two contemporaries of the 20th century, Edward Said and Yoo Jong-ho, shared the same humanistic position, show as many similarities and contacts as the differences. The mutual lighting of the two humanistic positions will provide clues that can lead to reflection related to the future of humanities, while expanding the horizon of humanism(人文主義, Inmunjuui). Edward Said’s theory of humanism is an example that leads to historical criticism and reflection of the humanistic ideology itself. Humanism closely tied to ‘criticism’ for Said is open to ‘newness’ and is a democratic process that approaches more true universality through ‘expansion of reason’. Compared to the side that tries to democratically criticize and overcome the established humanism, Yoo in itself pursues traditional Humanism that exists as “an ideal without alternatives.” He wants to stick to the classic and original ideology of liberalism in that he advocates an ideology that aims for excellence and is a product of European culture, but also for universality. This is why Yoo Jong-ho and Sides are revealing the clearest differences in their positions, especially over the issue of ‘canon’. Beyond these differences, the two first appear closest in that they place ‘language’ at the core of ‘Humanism’. This shows the two men’s common trust in the autonomous ability of humans to govern ‘language’. The fact that they emphasize the ability to empathize and empathize in the humanities is also a point where the two meet. Yoo repeatedly emphasizes the expanding function of literature’s ‘imaginary empathy’ in the context of liberal literary advocacy, while Said understands the humanistic reading as an imaginary act to sympathize with the author’s position and try to put himself in that position. Finally, the two also show contact in the flexible openness of the mind, which Keats’ concept of ‘Negative Capability’ means. Said’s unsystematic character in Auerbach’s mimmesis relates to the character of humanistic knowledge, which is similar to the critical concept of Lionel Trilling’s ‘Negative Capability’ mentioned by Yoo Jong-ho. Passive ability relates to the openness of flexible thinking in terms of rejecting or withholding doctrinal fidelity to ideology and theory, and Auerbach’s work also leaves much room for explanation for the flexible openness of Negative Capability. And in this context, it can also be noted that the two humanists are based on the ethics of doctrines rejection and tolerance while pursuing cultural pluralism.
골반 X-ray 영상에서의 대퇴골두 무혈성 괴사의 Normative Modeling
정조은(Joeun Jeong),박재석(Jaeseok Park),채동식(Dongsik Chae),신태훈(Taehoon Shin) 대한전자공학회 2024 대한전자공학회 학술대회 Vol.2024 No.6
In this paper, we introduce a normative modeling method using X-ray images to distinguish stages of osteonecrosis of the femoral head (ONFH). For ONFH, caused by impaired blood flow, early treatment is important. MRI is effective but expensive and less accessible, while X-ray imaging is more accessible but struggles with early-stage diagnosis. The proposed method uses a U-Net model and a modified autoencoder for femoral head segmentation to learn normal femoral head features. Through the proposed model, we compare and analyze the distribution of ONFH by grade in latent space.
한필구(Pilkoo Han),박재석(Jaeseok Park),전병호(Byoungho Jun),강병구(Byunggoo Kang) 한국IT서비스학회 2010 한국IT서비스학회지 Vol.9 No.3
Mobile applications market has emerged as new business model. The purpose of this study is to analyze the factors of mobile applications adoption. Based on prior studies of TAM and mobile technology/service, service quality, user experience, OS compatibility, self-efficacy, innovativeness, perceived usefulness, perceived ease of use, and cost were identified as affecting factors of mobile applications adoption. According to the results, service quality is significantly related to the perceived usefulness, and self-efficacy and innovativeness are significantly related to the perceived ease of use. User experience was also found to be related to both the perceived usefulness and the perceived ease of use. In case of OS compatibility, it was found to be significantly related to the perceived ease of use, but not to the perceived usefulness. Both the perceived usefulness and the perceived ease of use were found to be related to the adoption of mobile applications. However, cost was not found to be significant to the relationship between the perceived usefulness/the perceived ease of use and the adoption of mobile applications. This study contributes to provide the base of activation strategies and practical implications for mobile applications.