• Proceedings of the Korean Information Science Society Conference
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• 2006.10b
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• pp.535-538
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• 2006

디지털 기술이 급격하게 발전함에 따라서 사용자들은 더 현실감을 느낄 수 있고 능동적으로 상호작용 할 수 있는 방송을 원하게 되었다. 최근 들어서 삼차원 다시점 방송이 이러한 것을 만족시키는 서비스로서 많은 관심을 받으면서 두각 되고 있다. 일반적으로 서버에 입력되는 모든 영상들은 전부 클라이언트로 전송되게 된다. 이후에 사용자는 전체 시점 중에서 몇 개의 시점을 골라서 보게 된다. 하지만 이러한 종류의 시스템은 클라이언트와 서버 모두가 막대한 처리 능력을 필요로 하게 되고 이것은 응용 프로그램을 구현하는데 있어서 어려운 문제가 된다. 이러한 문제를 극복하기 위해서 두 개의 시점을 선택하여 클라이언트로 전송하는 간략한 방법이 사용 가능하다. 본 논문의 시점 선택 과정은 MPEG-21 DIA (Digital Item Adaptation)와 융합되어있기 때문에 우리의 시스템은 MPEG-21 멀티미디어 프레임워크와 완벽하게 호환된다. 그리고 다시점 카메라와 시스템에 대한 XML 형식의 다시점 명세서를 최초로 소개한다. 마지막으로 우리는 다시점 입체 영상을 시청하는 동안에 사용자가 느낄 수 있는 불편함을 최소화 하는 방법으로 IVR (Intermediate View Reconstruction) 제안한다.

• Parasites, Hosts and Diseases
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• v.43 no.1 s.133
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• pp.15-18
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• 2005

The diagnosis of human hydatidosis is primarily made using radiological and serological methods. Radiological methods are generally of low specificity and serological methods lack sensitivity, especially for pulmonary disease. In this study the capabilities of a new rapid test, the hydatid antigen dot immunobinding assay (HA-DIA), which was developed for the diagnosis of pulmonary hydatidosis, were studied and compared with another immunodiagnostic method, indirect hemagglutination (IHA). The study subjects included 18 patients, 9 women, 9 men; range 7 to 63 years; mean 30 years, with surgically proven pulmonary hydatidosis, a control group comprised of 14 patients; viral respiratory infections (1), cirrhosis (2), connective tissue disease (2), taeniasis (3), and 6 healthy donors. We found that the HA-DIA test had a sensitivity of $67\%$ and specificity of $100\%$, and that the IHA test had a sensitivity of $50\%$ and specificity of $100\%$. We conclude that HA-DIA is a simple, rapid, low cost assay that does not require instrumentation and has a higher sensitivity than IHA for the diagnosis of pulmonary hydatidosis.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.22 no.8
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• pp.538-544
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• 2010

An experimental investigation is presented to study the effect nozzle spacing, jet to plate spacing and Reynolds number on the local heat transfer to normally upward impinging submerged circular water jets on a flat heated surface. Nozzle arrays are a single jet(nozzle dia. = 8 mm), a row of 3 jets(nozzle dia. = 4.6 mm, nozzle spacing = 37.5 mm) and a row of 5 jets(nozzle dia. = 3.6 mm, nozzle spacing = 25 mm), and jet to plate spacing ranging from 16∼80 mm(H/D = 2∼10) is tested. Reynolds number based on single jet exit condition is varied 30000∼70000($V_o$ = 3∼7 m/s). Except for the condition of H/D = 10, the average Nusselt number of multi-jet is higher than that of single jet. For H/D = 2, average Nusselt number is increased by 50.3∼82.5% for a row of 3 jets and by 52.9∼65.2% on a row of 5 jets when compared to the average Nusselt number on the single jet.

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.1 no.2
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• pp.70-81
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• 2002

1990년대 후반부터 다양한 디지털 통신망을 이용하여 멀티미디어 컨텐츠 서비스가 가능하게 되었다. 하지만 멀티미디어 컨텐츠의 전달 및 이용을 위한 기반 구조들의 독자적 발전 및 다양한 통합 관리 시스템 때문에 멀티미디어 컨텐츠 표현 방식의 호환성, 네트워크 방식과 단말기 등의 잠재적인 문제점이 발생한다. 이를 위해서 현재 존재하는 기술 및 기반 구조들 사이의 연동을 통한 큰 멀티미디어 프레임워크인 MPEG-21이 진행 중이다. 본 논문에서는 현재 표준화 작업이 진행 중인 MPEG-21을 기반으로 하는 웹 (Web) 기반 테스트베드를 제안한다. 기본적으로 테스트베드는 서버(server), 클라이언트(client), DIA(Digital Item Adaptation)의 세 모듈로 구성된다. 서버의 역할은 멀티미디어 컨텐츠를 Digital Item(DI)의 형태로 생성하고, 클라이언트가 DI를 요구할 경우 DIA 모듈을 통해서 변환된 DI를 클라이언트에게 제공한다. DIA 모듈은 서버에서 동작되며 클라이언트로부터 요청된 DI를 분석하고 클라이언트로부터 전송된 환경 정보를 이용하여 클라이언트 환경에 적합하게 변환된 (adapted) DI를 생성하는 것이 주 기능이다. 클라이언트는 서버에 저장되어 있는 DI를 선택하고 사용자 선호도(user preferences), 터미널 능력(terminal capabilities) 등의 필요한 정보를 서버로 전송한다. 테스트베드에서는 스포츠 경기의 동영상, 정지 영상, 경기 내용, 역사를 기록한 파일 등의 DI를 이용한다. 표현 언어는 XML이며, HTTP 기반의 웹 환경에서 구동되도록 설계된다.

• Journal of radiological science and technology
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• v.39 no.3
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• pp.369-376
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• 2016

Positron Emission Tomography(PET) is nuclear medical tests which is a combination of several compounds with a radioactive isotope that can be injected into body to quantitatively measure the metabolic rate (in the body). Especially, Phenomena that increase (sing) glucose metabolism in cancer tissue using the $^{18}F$-FDG (Fluorodeoxyglucose) is utilized widely in cancer diagnosis. And then, Numerous studies have been reported that incidence seems high availability even in the modern diagnosis of dementia and Parkinson's (disease) in brain disease. When using a dynamic PET iamge including the time information in the static information that is provided for the diagnosis many can increase the accuracy of diagnosis. For this reason, clinical researchers getting great attention but, it is the lack of tools to conduct research. And, it interfered complex mathematical algorithm and programming skills for activation of research. In this study, in order to easy to use and enable research dPET, we developed the software based graphic user interface(GUI). In the future, by many clinical researcher using DIA-Tool is expected to be of great help to dPET research.

• Journal of the Society of Disaster Information
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• v.13 no.2
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• pp.233-248
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• 2017

Uniform laws and regulations and reasonable design is necessary for the prevention of possible fire in super high-rise building. To this end, this study focused on super high-rise and massive building-related architectural review performance-based design (PBD) evaluation disaster impact assessment (DIA), and provided fire engineering measures for improving fire prevention on the basis of performance-based design by analyzing the buildings subject to these systems and problems in terms of contents. Above all, in the aspect of law and standard improvement, first, with regard to dual parts of two statutes though significant portion of them has the same contents in performance-based design (PBD) evaluation and disaster impact assessment (DIA), it is necessary to operate the systems after making them conform with each other and consolidating or abolishing them. Second, if it is impossible to consolidate or abolish performance-based design (PBD) evaluation and disaster impact assessment (DIA), the areas of contents of performance-based design (PBD) evaluation and disaster impact assessment (DIA) should be precisely classified and established. Next, engineering improvement measures against fire hazard in super high-rise building are as follows. First, it is necessary to revise the provisions of straight-run stairs in special escape stairs. And in case of installing a mechanical smoke exhaust system instead of smoke vent, sandwich pressurization used in the United Stated should be permitted. Second, with regard to smoke control system for special escape stairs, it was shown that there was necessity for revising the standards in order to enable air to be supplied according to section in case of fire, carrying out performance-based design, and the like from the early design stages to the completion stages. In the future, it is expected that an epoch-making contribution will be made to a decrease in casualties and property damage due to fire in case of super high-rise building where the results can be reflected after carrying out a study on maintenance and carrying out an additional study on other considerations of super high-rise building together with reflecting the improvement measures provided in the above-mentioned study.

• KOGO NEWS
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• v.9 no.2
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• pp.5-9
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• 2009

• Journal of Korea Foundry Society
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• v.14 no.6
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• pp.558-565
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• 1994

The horizontal continuous casting process with the heated mold was applied to obtain the unidirectionally solidified rods($4{\sim}8mm$ dia.) of pure copper with good surface quality. The results could be summarized as follows. 1. The unidirectional solidification of pure copper rods with good surface(mirror surface) quality could be obtained by placing the S/L interface inside the heated mold cavity even though the cast copper rods were covered with thin copper oxide layer. 2. The casting speed for 4mm dia. rods with mirror surfaces was affected significantly by the mold-cooler distance rather than the cooling flow rate when other casting conditions were fixed. 3. The casting speed was the main factor affecting the oxidation of copper during the continuous casting and the thickness of copper oxide layer decreased almost linearly as the casting speed increased.

• Proceedings of the IEEK Conference
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• 2003.07d
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• pp.1483-1486
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• 2003

This paper describes design and implementation of the DIDL(Digital Item Declaration Language) parser and Session mobility in Digital Item Adaptation. The DIDL is a declaration language which is a uniform and flexible abstraction and interoperable schema for declaring Digital Items. Session mobility specifies a mechanism to preserve a user's current state of interaction with a Digital Item. In this paper, Session mobility is implemented through the DIDL. For session mobility, the XDI (context digital item) shall capture the configuration-state of a Content digital item, shich is defined by the state of Selection elements in DIDL.

• Proceedings of the IEEK Conference
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• 2003.07d
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• pp.1475-1478
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• 2003

When multimedia contents are adapted to different terminals in the ubiquitous computing environment, the contents' modalities can be converted variously. In this paper, we present an efficient user preference that enable user to specify his choices on the modalities of the adapted contents. We also propose the methods to systematically integrate the user preference into the content adaptation process. This modality conversion preference has been developed as a description tool for MPEG-21 Digital Item Adaptation (DIA).