• Annual Conference of KIPS
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• 2002.04a
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• pp.501-504
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• 2002

오늘날 어떠한 복잡한 기기에 있어서도 S/W 의 신뢰도는 중요한 요소가 리고 있다. S/W 신뢰도는 보통 NHPP와 같은 신뢰도모델에 의해서 평가한다. S/W 시스템은 테스트 단계예서 품질이 향상되고 운영단계에서는 거의 변화가 없다. 신뢰도를 테스트 단계에서 추정할 것인가 아니면 운영단계에서 추징할 것인가의 여부에 따라서 그 추정방법이 달라져야 한다. 본 논문에서는 두 가지의 상이한 신뢰도개념 즉 운영신뢰도와 테스트 신뢰도를 명확히 구분하여 자세히 고찰한다. 이러한 개념은 기존의 여러 문헌에서 혼용해 사용하거나 잘못사용되어 왔다. 상이한 신뢰도개념을 사용하면 상이한 신뢰도를 얻게 되며, 추후 상이한 신뢰도기준 결정기법에 이르게 된다.

• 기계와재료
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• v.22 no.2
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• pp.20-30
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• 2010

석탄화력발전소의 효율향상은 스팀온도 및 압력의 증가를 통해 꾸준하게 이루어지고 있으며, 이러한 고효율의 화력발전은 사용 연료의 감소 뿐 아니라 $SO_x$, $NO_x$, $CO_2$ 등의 환경 가스배출을 감소시키는 효과도 있다. 이에 따라 운전조건을 고온, 고압화하려는 노력이 전 세계적으로 꾸준히 전개되고 있으며, 경제성 있고 높은 고온특성을 갖는 터빈 및 보일러 소재확보 여부가 발전소 건설 가능성을 결정하는 가장 주요한 요소 중 하나로 작용하고 있다. 본 고에서는 USC(Ultra Super Critical) 조건에 사용하기 위한 소재의 개발과정과 현대 사용되고 있는 다양한 발전용 고온소재의 특징에 대해 기술하고자 한다.

• Annual Conference of KIPS
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• 2003.11c
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• pp.1379-1382
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• 2003

분산 시스템 환경의 사용이 증가하면서 트렌잭션 처리의 중요성이 부각되고 있다. 이러한 트랜잭션의 사용에 있어서 효과적인 트랜잭션 제어 및 수행완료 검증의 필요성이 제기된다. 이에 본 논문에서는 개념적 설계와 수학적 해석이 가능한 EMFG(Extended Mark Flow Graph)로 트랜잭션 기본 연산을 표현하고 이를 이용하여 다중 트랜잭션을 표현하고, 이를 통해 도달가능트리기법을 사용하여 트랜잭션 수행완료 여부를 검증하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04a
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• pp.283-285
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• 2001

DRM(Digital Right Management)은 다양한 채널을 통해 유통되는 디지털 콘텐츠를 불법 사용으로부터 보호하고, 컨텐츠 소유자가 정한 사용 규칙이 지속적(persistent)으로 관리 되도록 하는 기술이다. DRM 서비스의 각 기능을 컴포넌트화 시켜서 재사용성을 강화시키고, 기존 DRM 시스템의 서비스의 문제점을 해결하기 위해서 선(Sun)의 엔터프라이즈자바빈(Enterprise JavaBeans, EJB) 어플리케이션 프레인 워크 상에서 DRM을 구현하였다. DRM 시스템의 가동에 있어서 비즈니스 룰의 충돌은 DRM시스템 작동 여부를 결정할 만큼 중요한 문제이다. 룰 자체가 자연어로 기술되고 언젠가는 모순을 유발할 가능성이 높기 때문에 먼저 명확한 논리식으로 표현하고 LEGO라는 정형 기법 도구를 통해 검증하도록 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.10a
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• pp.313-316
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• 2012

각 지방청에서 통항선박의 안전을 위하여 추진하고 있는 항로표지시설(등표, 등부표) 설치 시 해당 공유수면에 대한 점 사용 협의 여부에 대한 명확한 해석이 필요하고, 또한 공유수면에 항로표지시설을 설치할 경우 공유수면 점 사용협의의 필요성과 관련된 항로표지법 및 공유수면 관리 및 매립에 관한 법령을 검토한 결과를 알리고자함.

• Annual Conference of KIPS
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• 2000.04a
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• pp.907-911
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• 2000

타포린 제조 공정에서 함침의 발생 여부를 검사하는 것은 동 업계의 중요한 문제이다. 본 논문에서는 모폴로지를 사용한 함침 검사를 수행하였다. 모폴로지를 이용한 변환들 중의 하나인 Top hat 변환을 사용하였으며, 이 변환은 완만하게 불균일한 배경에서 급격한 변화를 가지는 물체를 추출하는데 탁월한 성능을 가진다. 이를 사용한 결과, 250dpi 영상에서 0.2mm 이상 크기의 함침을 검출할 수 있었다.

• Korean Journal of Social Welfare
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• v.69 no.2
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• pp.247-269
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• 2017

This study aims to analyze multiple mediating effects of asset and self-esteem on the relationship between disability of household head and life satisfaction. This study used 9th panel data of KoWePS(Korean Welfare Panel Study) and employed path analysis with A-MOS. Research findings of this study are as follows: First, disability of household head had a negative effect on life satisfaction, total assets, and self-esteem. Second, we found not full but partial mediating effects of assets on the relationship between disability and life satisfaction. Third, similarly we found not full but partial mediating effects of self-esteem on the relationship between disability and life satisfaction. Finally, we found multiple partial mediating effects of assets and self-esteem on the relationships between disability and life satisfaction. The findings of this study suggest that financial education as well as asset management targeting persons with disability are necessary and very helpful to sustain their life satisfaction. In addition, we need to think about asset-building programs targeting persons with disability.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.3
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• pp.310-315
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• 2021

In the case of weapon systems used by the military, defense standards are applied for economical and efficient procurement, management, and maintenance. Defense specifications are documents describing procedures and methods for determining whether technical requirements for products and services are consistent and apply to the production of weapon systems, quality assurance, and configuration management. Software is also subject to defense specifications, and is documented and managed in the same way as other defense specifications. Sometimes it happened to be standardized without some(or all) software. In this case, a competitive contract is impossible and it may affect the quality of weapon systems because the manufacturer arbitrarily changes the software without prior approval. So, software standardization is required, but it is very difficult to verify for firmware installed in hardware. This paper proposed a verification method for g software standardization, and we expect it will contribute to the efficient production and quality assurance of weapon systems.

• Journal of dental hygiene science
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• v.8 no.4
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• pp.267-274
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• 2008

The purpose of this study was to examine the use of dentifrice among children in a bid to provide information on dentifrice including its function to children's parents, the major consumers of dentifrice for child. And it's additionally meant to offer useful information on the production of toothpaste for kid. The subjects in this study were parents with children, who dwelled in Seoul and Gyeonggi province. After a self-administered survey was conducted for about three months from May to July 2007 to gather data on their use of dentifrice for child, a comparative analysis was implemented. The findings of the study were as follows: 1. Concerning the state of the use of their children's dentifrice, the largest number of the children(58.1%) started to use toothpaste at the age of one or down, and the most common first toothpaste they used was dentifrice for preschooler(86.8%). As for whether to use fluoride-containing toothpaste, the largest group of the parents(58.1%) gave an affirmative answer. Regarding the form of the toothpaste in use, the majority of their children used toothpaste of cream type(86.2%). The greatest group of the children used the amount of toothpaste that was as large as the three-tenths or four-tenths of the bristles(35.9%). 2. As for the state of the use of dentifrice for kid, the greatest group used that kind of toothpaste(81.4%). In the event of those who didn't use it, the last time when their children used toothpaste for kid was when they were at the western age of 3(33.9%) and 4(33.9%). Concerning the reason why they replaced toothpaste for kid with one for adult, the largest group of the parents did that on their own judgment(58.1%). As to the right time for replacing toothpaste for kid by one for adult, the greatest group considered it advisable for children to start using toothpaste for adult at the western age of 4 or 5(43.2%). 3. In relation to the state of the purchase of toothpaste for their children, the largest group was under the moderate influence of the children when they bought it(45.2%). The greatest group attached importance to the ingredients of toothpaste(41.6%), and the most preferred ingredient was fluoride(56.3%). 53.0 percent took consideration on the content of ingredients or the instructions. 4. In regard to priorities for the choice of toothpaste for their children, they gave top priority to brand(16.7%), followed by quality(14.6%) and ingredients(13.5%). The age of the parents made a statistically significant difference to the children's age when they started using toothpaste, and how they started to do that and whether they used fluoride-containing toothpaste were statistically significantly different according to that as well(p < 0.01). In regard to the impact of the occupation of the parents, the use of fluoride-containing toothpaste was more common among the stay-at-home mothers(p < 0.01).

• Journal of Korean Library and Information Science Society
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• v.40 no.2
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• pp.223-242
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• 2009

This is an exploratory study targeting initial users to evaluate the usability of an aggregator-supplied full-text database and to analyze the differences in task performance and perceptions based on participant characteristics. The differences in completion time and perceptions on ease of use, terminology, subject categories and satisfaction were analyzed based on the participant characteristics such as Kolb learning style, gender and participation in user instruction on full-text databases. The results indicated that there was a statistically significant difference in completion time based on the Kolb learning style. Also a statistically significant difference was found in perceptions on ease of use and terminology based on gender. However no statistically significant difference was found in perceptions on the usability of the database based on the participation in user instruction.