• Journal of Advanced Marine Engineering and Technology
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• v.19 no.1
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• pp.36-44
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• 1995

Melting characteristics of unrestrained liquid ice in a rectangular vessel with heated top wall were investigated experimentally. The liquid ice, a mixture of ice particles and ethylene-glycol aqueous solution, was adopted as a testing material. During the melting process the liquid ice was drawn by buoyancy to the heated top wall of the rectangular vessel where close-contact melting occured. The melting behavior and melting rate of the liquid ice as well as local/mean heat-transfer coefficient at the heated top wall were observed and measured under a variety of conditions of heat flux and various initial concentration of the aqueous binary solution. It was found that the heat transfer of the heated top wall is remarkably promoted by the close-contact melting, and that the dendritic frozen layer at the lower interface of the liquid ice is formed. Photographic evidence demonstrated that plumes containing solute-rich liquid issued from isolated chimneys within the liquid ice layer where segregation of interstitial channel took place.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.3
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• pp.681-689
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• 2008

Graphic User Interface(GUI) of mobile application is the working environment exchanging informations and almost functions on mobile are operated by it. In order to increase the productivity and to develop reliable mobile software, GUI test is absolutely needed. In this paper, we introduce the scenario based GUI test method and automatic tool(MoGuT). The MoGuT can detect the functional faults using scenarios and operate in SKVM environment.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10a
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• pp.611-613
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• 1999

테스터의 간섭없이 테스트를 수행할 수 있는 새로운 테스트 도구인 테스트 에이전트 시스템을 구현하였다. 이 시스템에서 테스터는 테스터 이름, 테스트 시간을 입력하고, 테스트 대상을 선택 후, 그 밖에 테스트에 필요한 정보를 입력하고 나면 테스트 에이전트 시스템이 스스로 테스트를 수행한 후 각 테스트 레벨에 대한 테스트 항목의 테스트케이스와 Quality 측정치를 테스트결과로 받아 볼 수 있다. 이 테스트 에이전트 시스템은 3개의 에이전트로 구성이 되어 있고 각 에이전트들은 에이전트의 특성인 자율성, 사회성, 지능성을 가지고 있다. 특히 지능성을 나타내 주는 것을 규칙 기반 시스템을 이용하여 구현하였다. 'User Interface Agent'에는 '리그래션 테스트 대상 판단 규칙'과 'Test History 크기 관리 규칙'이 있고, 'Test Case Selection '||'&'||' Testing Agent'에는 테스트케이스를 선택하는 데에 적용하는 '중복성 제거 규칙'과 '일관성 있는 테스트케이스 선택 규칙'이 있다. "Regression Test Agent'에서는 리그래션 테스트 관련 항목 찾는 규칙'이 있어 각 에이전트들의 지능성을 뒷받침해 준다. 본 논문에서는 각 규칙들을 술어 논리로 표현하여 제시하였고, 구현한 테스트 에이전트 시스템의 Prototype을 기술한다.

• The Transactions of the Korean Institute of Power Electronics
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• v.27 no.5
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• pp.397-401
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• 2022

The construction of the ITER tokamak machine is ongoing at a 77% process rate to achieve the first plasma in 2025. The 18 sets of power supply systems comprising 400 MVA thyristor AC/DC converters for the superconducting magnets supplied by Korea (KO) are being installed with other systems, such as PF converters (China), DC busbars (Russia), and cooling water systems (India), in two buildings (Europe). The system interfaces have been defined during the design stage, and the systems have been manufactured. However, during the on-site installation work, several installation and integration issues emerged due to the manufacturing tolerance and design mistakes. To continue the installation and testing, the engineers of each system resolved the interface issues, planned the commissioning, and integrated the test plan. This paper describes the on-site installation status and issues and the commissioning plan of KO AC/DC converters.

• BMB Reports
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• v.55 no.5
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• pp.213-219
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• 2022

The blood-brain barrier (BBB) is an interface between cerebral blood and the brain parenchyma. As a gate keeper, BBB regulates passage of nutrients and exogeneous compounds. Owing to this highly selective barrier, many drugs targeting brain diseases are not likely to pass through the BBB. Thus, a large amount of time and cost have been paid for the development of BBB targeted therapeutics. However, many drugs validated in in vitro models and animal models have failed in clinical trials primarily due to the lack of an appropriate BBB model. Human BBB has a unique cellular architecture. Different physiologies between human and animal BBB hinder the prediction of drug responses. Therefore, a more physiologically relevant alternative BBB model needs to be developed. In this review, we summarize major features of human BBB and current BBB models and describe organ-on-chip models for BBB modeling and their applications in neurological complications.

• Journal of the Korean Institute of Telematics and Electronics
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• v.24 no.3
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• pp.425-432
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• 1987

The microprogram is the key technology of the implementation of the processor's control unit. But the coding and testing it is the most tedious process in the developing a new computer system. We developed the conversational micro architecture simulator(C-MAS) in order to use it as a microprogram development tool and a run time analyzer of the microprogram. We discuss the hardware description language(HDL) for a smulation, the design constraints of the C-MAS, and the user interface of it in this paper. We used the C language as the description language, and developed it on the berkeley UNIX4.2.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.05a
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• pp.59-60
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• 2021

To measure the effect of the stress-strain dispersion across the installed waterproofing layer on the concrete surface, a strain gauge was attached to the gap between the waterproofing layer and the concrete structure at specified points of upper, center and bottom of the load-displacement simulation specimen, and the peak stress-strain at the displacement interface were measured and compared with stress-strain at other areas to analyze each material types' stress-strain dispersion ratio properties. Based on the results of the testing, it was shown that materials with high load-displacement resistance performance accordingly had high stress-strain dispersion ratio results, and the materials from highest performance to lowest performance were; CAS, SAS, PUC and CSC.

• Annual Conference of KIPS
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• 2007.11a
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• pp.383-386
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• 2007

X-Forms 기반의 웹 UI(User Interface)를 개발하는 소프트웨어는 개발이 완료되어 운영되는 과정에도 사용자의요구, 성능향상, 기능개선, 기능추가 등의 이유로 변경이 가능하다. 이러한 소프트웨어의 유지보수도 일반적인 요구사항명세, 분석, 설계, 구현의 개발 프로세스를 따른다. 본 논문에서는 UI 개발 소프트웨어의 유지보수 단계에서 효율적인 테스트를 하기 위해 V-모델을 확장, 변형한 테스트 프로세스 제안한다. 제안한 테스트 프로세스의 주요 활동은 요구사항분석을 통한 테스트 계획, 테스트 데이터를 식별하고 환경을 구축하는 분석과 설계, 테스트 케이스를 명세화하고 테스팅 방법론을 적용하는 구현과 실현, 리포팅과 산출물을 정리하는 테스트 마감 활동으로 진행한다. 웹 UI 개발 소프트웨어의 특징에 맡게 테스트 프로세스를 구축하고 실무에 적용하여 에러 검출률, 테스트 시간, 테스트 결과의 효율성을 높일 수 있는 방법을 제안한다.

• Annual Conference of KIPS
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• 2007.05a
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• pp.151-154
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• 2007

소프트웨어는 의도하지 않은 결함을 반드시 가지고 있다. 이러한 결함을 찾아내기 위해서는 테스트가 반드시 진행 되어야 한다. 수많은 소프트웨어 제품들이 나오게 되면서 테스팅 기법도 표준화 되어 가고 있다. 이러한 테스팅 기법들을 현업에 종사하는 테스터가 사용시 많은 시간과 비용이 들게 된다. 이를 좀더 효과적으로 테스트 하여 시간과 비용을 줄일 수 있는 방안을 찾고자 하는 것이 본 논문의 목적이다. 실행 가능한(eXecutable), 확장된(eXtended), X-internet 환경을 구축하는 UI(User Interface)개발 도구를 개발함에 있어 제품의 안정성을 향상 시키기 위하여 기존의 소프트웨어 테스팅 기법을 이용한 테스팅 방법론을 연구하고자 한다.

• The Journal of the Convergence on Culture Technology
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• v.7 no.3
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• pp.497-508
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• 2021

After the spread of COVID-19, the OTT market has grown rapidly. Accordingly, competition of OTT platforms has intensified. Among them, TVing provides users distinct characteristics of service, such as media and commerce, to differentiate it from other platforms. It is important to offer appropriate usability when proving combined service in one mobile application. Otherwise, it can adversely affect the user experience. In this regard, this research conducted usability testing of TVing and found out what user experience should be considered when integrating different characteristics of service in one mobile application. Through the usability testing, we measured and analyzed effectiveness, efficiency, and satisfaction based on the ISO usability testing guidelines. As a result, three important considerations of UX design for mobile application of combined services were found; 1) connectivity between services, 2) easy navigation, 3) consistent UI design, and 4) relations between subjects and provided information. This design consideration is expected to be applicable not only to TVing mobile application, but also to the situation where composed services are provided in one application.