• Journal of the Korea institute for structural maintenance and inspection
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• v.27 no.1
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• pp.54-63
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• 2023

In this paper, the effect of corrosion level and crack width on the cohesive strength-slip behavior of corroded steel rebar and concrete interface is conducted. The existing studies mainly focus on the decrease in bond strength with respect to the level of corrosion; there are, however, few studies on the decrease in cohesive strength according to the crack width of the concrete surface due to corrosion. Therefore, in this study, a series of tests for the cohesive strength, slip behavior and mass loss of the reinforcing bar is evaluated at the surface of corroded rebar and concrete. It is found that the tendency to decrease the bond strength is closely related to the crack width rather than the corrosion level. Hence, to determine the degradation performance for the bond strength-slip behavior relation, the occurrence of cracks on the concrete surface can be a suitable index.

• Journal of Food Hygiene and Safety
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• v.33 no.4
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• pp.259-265
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• 2018

Since Korean housewives are responsible for the dietary practices of family at home, it is important to know what information will make them to buy safe food. This study was designed to determine the role of perceived threats, behavioral assessments, and self-efficacy factors known to promote healthy behavior in health belief models (HBM) based on food safety awareness and behavior of housewives. This study involved 191 housewives, based on key variables such as perceived severity, perceived susceptibility, perceived benefits, perceived barriers, self-efficacy, and purchase behavior. The results showed that higher levels of education and urbanization increased the threat perception and the likelihood of buying safe food. The correlation analysis showed that increased awareness and knowledge of safe foods and interest in health contributed to higher relative benefit or self-efficiency of food, and thus, ensured food safety. The conceptual model of food safety behavior based on the HBM was verified via structural equation analysis. The findings suggest that a suitable model showcasing knowledge levels and relative benefits resulted in a greater impact on purchasing behavior than perceived threats. This study suggests that it is more effective for housewives to provide more preventive information than risk information to purchase safe food.

• The Journal of Korean Association of Computer Education
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• v.23 no.4
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• pp.61-68
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• 2020

The purpose of this study is to develop a debugging task to support process-centered assessment on software(SW) education and to develop a service site. Achievement criteria for programming in elementary and middle school SW curriculum consists of control structures such as repetition and condition, and elements such as variables and input/output. In order to apply the process-centered assessment presented by the Ministry of Education, it is necessary to present tasks that can be used in the actual classroom environment and to consider connection with achievement levels. Therefore, in this study, 12 tasks for elementary school and 15 tasks for middle school were developed as debugging tasks and their validity was verified. As a result of conducting Delphi verification for validity, it was found that the level and content of the debugging task are appropriate. In addition, as a result of verifying the usability of the debugging challenge site by applying a heuristic evaluation method, it was found that it is suitable for use in the real educational field.

• Journal of The Korean Association of Information Education
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• v.4 no.1
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• pp.32-39
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• 2000

The traditional programs developed by the existing CAI technique have the fixed curricular, which make it difficult to deliver various study materials that fit the learners of various levels. In addition, a lack of the flexibility prevents from helping to make their methodology in studying uniform open minded. In order to solve these problems, we have designed and implemented a learner interface that can exclude the limits in the learners active study in solving the fractional operation. In addition to the user interface, this study includes a diagnosis module that can intellectually extract the status of learners understanding, ostensible bugs, and the associated misconceptions through the interface. The experimentation based on the learner interface and the diagnosis module shows that this system correctly diagnoses the level of learners' understanding and the errors in learning, which greatly helps the individualized study.

• Journal of Digital Convergence
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• v.9 no.4
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• pp.143-156
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• 2011

To accomplish these purposes, First, this research divided hallmark of the environment friendly agricultural products into organic products and pesticide-free products and participants are classified as having promotion or prevention regulatory focus. In addition, consumer value type is categorized into value of social psychology and functional value. Second, construal level divided into high and low on the relationships between the consumer value and purchase intention. The main factors of the consumer value such as value of social psychology and functional value were found from the previous studies. This study is meaningful that the fit of regulatory focus between hallmark of organic products and pesticide-free products in environment friendly agricultural products. The regulatory relevance could moderate the level of persuasion knowledge activation. Also, This research is meaningful that the fit of construal level theory between Consumer value and purchase intention by person's psychological personality. The construal level relevance could moderate the level of marketing activation.

• Journal of dental hygiene science
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• v.11 no.3
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• pp.265-272
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• 2011

The purpose of this study is to compare oral hygiene status between young adult group and older adult group and to suggest a pathway model of oral health level in self-assessed. Subjects were totally 80 people with young adult group and the older adult group. The data, which was collected by surveying for one month from July 1, 2010 to July 30, was analyzed with SPSS VERSION 19.0 and AMOS 19.0. Oral hygiene test and questionnaire survey were carried out from targeting. 1. The young adult group and older adult group had the same quality in oral health level score and living habit. 2. The oral hygiene status in young adult and older adult group was same in 7 items(58.33%) out of 12 items. 3. Oral health level score in self-assessed of young adult group could be explained with 34% by 3 variables. Older adult group could be explained with 26% by 2 variables. 4. In young adult, the fitness of path model was very good with 0.96 in CFI, 0.94 in TLI, and 0.00 in RMSEA. In older adults, the fitness of path model was very good with 1.00 in CFI, 1.15 in TLI, and 0.00 in RMSEA. This might imply if TMJ disorder level and number of infection is neglected in young aldults, mastication function will be significantly effected in older adults. Thus, development and management of health education program is needed based on self-assessment oral health level by young adults group and older adults group.

• Proceedings of the Korean Society for Quality Management Conference
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• 2007.04a
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• pp.229-234
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• 2007

반도체 산업에서 동일제품을 여러 라인에서 생산하는 것은 일반적이다. 모든 라인에서 생산된 제품의 품질수준의 동일 여부는 반도체 공정 계측데이터의 동일성 여부로 결정된다. 이러한 의사결정에 앞서 계측데이터를 생산하는 라인간 계측시스템의 동일성 검정은 필수적이다. 일반적인 두 집단의 동일성검정 방법은 동일시료를 두 집단에서 반복 측정하여 측정값의 차이를 비교하는 방법이다. 그러나, 반도체 계측특성은 동일시료를 반복 측정할 때, 물리적 영향 등에 의해 시료가 변화하여 반복측정이 난해한 특징을 가지고 있어 일반적인 반복측정 방식의 동일성 검정방법은 적합하지 않다. 본 연구에서는 반복측정이 난해한 반도체 계측 특성 하에서 가설검정을 이용한 라인간 계측 동일성 검정방법을 제시하고 실제 반도체 공정에 적용한 사례를 소개하고자 한다.

• Journal of KIISE:Information Networking
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• v.28 no.2
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• pp.207-216
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• 2001

이동 방송 환경은 정보를 가지고 있는 서버가 다수의 이동 클라이언트에게 모든 데이터를 주기적으로 방송하면 클라이언트가 자신이 원하는 데이터가 방송 채널에 나타날 때 이를 검색하는 환경을 말한다. 이때 클라이언트가 수행하는 읽기 전용 트랜잭션은 일관적이면서도 가장 최근에 갱신된 데이터를 필요로한다. 이동 방송환경에 적합하도록 연구된 기존의 병행성 제어 기법들을 클라이언트가 일관적인 데이터를 읽는 것은 보장하지만 가장 최근에 갱신된 데이터를 읽을수 있게 하는 최신 현행성은 보장하지 못한다. 본 논문에서는 기존 기법들과 동일한 수준의 일관성뿐만 아니라 최신 현행성을 보장하는 효율적인 병행성 제어 기법을 제안하고 이를 검증한다. 아울러 제안된 기법의 성능을 평가하기 위하여 최신이 아닌 데이터를 읽은 경우(stale read)의 수와 트랜잭션 중단의 수를 각각 측정하였다. 시뮬레이션을 통한 실험결과 본 논문에서 제안하는 기법은 기존의 방법과 비교할 때 항상 최신의 데이터를 읽으면서 트랜잭션중단의 수를 감소시킨다는 것을 알수 있었다.

• 한국벤처창업학회:학술대회논문집
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• 2019.04a
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• pp.109-118
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• 2019

기업가정신이 기업의 혁신 및 국가 경제발전에 중요한 역할을 한다는 인식이 높아지면서 기업가정신교육도 전 세계적으로 확산되고 있는 추세이다(Katz, 2003; Kurako, 2005). 한국 정부는 '창의인재양성'이라는 교육정책 목표로 기업가정신교육 예산이 증가시키고 있으며, 교육 대상자도 대학생 및 성인 대상을 중심에서 중 고등학생으로까지 확장하고 있는 실정이다. 기업가정신교육은 창업가적 스킬을 발전시키고 진로선택에 있어서 도움을 주는 것을 목적으로 하고 있으나(Linan, 2004), 다수의 기관에서는 저마다의 기업가정신에 대한 정의 및 운영방식을 적용되고 있는 것이 현실이다. 일반적으로 대학수준의 프로그램에서는 교육의 효과성을 창업의도(Entrepreneurial Intention)로 측정하고 있지만, 사회에 진출하기에 이른 시기인 청소년에게 그 지표를 그대로 적용하는 것은 적절하지 않다는 비판이 제기되고 있다. 이에 따라, 본 연구에서는 한국에서 운영되고 있는 대표적인 2개의 청소년 기업가정신교육기관의 커리큘럼을 분석하여 청소년에게 적합한 효과성 지표를 제시하고, 두 프로그램의 효과성 결과를 비교분석하여 향후 청소년 기업가정신교육의 발전방안에 대해 제시하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10c
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• pp.664-666
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• 2003

임베디드 소프트웨어가 점점 더 복잡해지고, 시장화시간(time­to­market)은 점점 짧아 짐으로써 임베디드 소프트웨어 디자이너들은 세부적으로 모듈화 되고 재설정 가능한 소프트웨어를 작성하도록 요구된다. 그러나 이렇게 재설정 가능한 모듈과 컴포넌트들이 급속히 늘어남에 따라 많은 모듈과 컴포넌트들을 설정하고 관리하는 것은 매우 복잡한 작업이 되고 있다. 특히, 모듈이나 컴포넌트간에 의존성이 있는 경우 이를 적절히 기술하고 체크 할 수 있는 방법이 요구된다. 본 논문은 재설정 가능한 모듈과 컴포넌트가 수작업으로 관리하기 어렵도록 높은 수준일 때 간단한 툴인 Target Builder를 이용해 이들간의 관계를 기술하고 관리하는 방법을 제시한다. 비록, 이 툴은 간단한 수준의 기능만을 제공하지만. 실제 개발 현장에 적용한 결과 높은 정도의 재설정을 요구하는 소프트웨어 시스템의 관리에 매우 적합하며, 기존의 소프트웨어 시스템에도 쉽게 적용될 수 있었다.