• 한국간호교육학회지
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• 제8권1호
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• pp.61-71
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• 2002

purpose : The purpose of this study was to find out the influencing factors of smoking-cessation behavior of patients with coronary heart disease and to suggest the model of smoking-cessation behavior which was based on the relationship between influencing factors and then to test its fitness empirically. method : This study was based on the Theory of Reasoned Action and a hypothetical model was constructed with fifteen paths in consideration of main predictive factors of smoking-cessation behavior such as biological factor, disease-related characteristics, self-efficacy, supportive factor, environmental factor, disease-related perception factor, intention-to-quit, and psychological factor. The validity of a smoking- cessation model was tested to 264 patients with coronary heart disease by using SPSS 8.0 and Window LISREL 8.12a. results : 1. Seven of the 15 paths of smoking-cessation behavior proved to be significant. 2. The final model excluded three paths in the hypothetical model was demonstrated to be improved by $x^2$=44.31 (df=38, p=.22), Goodness of Fit Index (GFI)=.98, Adjusted Goodness of Fit Index (AGFI)=.96, Non-Normed Fit Index(NNFI)=1.00, Normed Fit Index(NFI)=1.00, and Root Mean Square Residual(RMR)=.24. 3.The smoking-cessation behavior was influenced directly by biological factor, self-efficacy, supportive factor, environmental factor, intention-to-quit, and psychological factor. The smoking-cessation behavior was accounted for 82% of variance by these factors. conclusion : although the adolescents' smoking behavior can be predicted by only smoking intention, it is hard to predict the adults' smoking-cessation behavior by only this factor. Therefore, intention-to-quit, self-efficacy, supportive factor should be improved because these are promotive factors for smoking-cessation behavior. Biological factor, environmental factor, and psychological factor are inhibitive factors, so nicotine replacement therapy is helpful to the high nicotine-dependents, and ex-smokers avoid other smokers in their environment and also patients should learn and practice the stress coping-skills.

• 대한교통학회지
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• 제28권6호
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• pp.55-62
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• 2010

도시의 쾌적한 공간조성을 통하여 도시공간의 질과 공공성을 높이기 위해 도입된 공개공지는 건축법, 지구단위계획에 의해 법제화되었다. 그러나 현행 제도는 공개공지 조성에 있어 필요한 최소한의 규정에 지나치지 않아 공개공지 본연의 기능을 다하지 못하고 공공성의결여, 설치 및 유지 관리상의 문제 등 여러 가지 문제점을 나타내었고 이용자 만족도와 활용도를 높여 도시공간의 공공성을 높이는 공개공지 조성의 필요성이 대두되었다. 따라서 본 연구에서는 인자분석을 통하여 공개공지 주요 설계요소 어떤 인자가 가장 큰 영향을 미치는지를 분석하여 현 공개공지의 개선방안 제시 및 향후 공개공지 설치기준 설정을 위한 기초자료를 제공하는데 목적이 있다. 현 공개공지 문제점을 해결하고 보다 개선된 공개공지 조성을 위하여 설문조사를 통하여 선별된 주요 설계요소를 제어 시뮬레이션하고. 심리적 평가와 인자분석을 실시한 결과 편의성, 친근성, 쾌적성, 접근성, 개방성의 5개 인자가 추출되었다. 이 중 제1인자인 편의성의 설명력이 기여율 25.0%로 가장 높게 나타났으며, 편의성 측면을 향상 시킬 수 있는 공개공지의 대지 내 위치, 편의시설의 설치 및 적절한 배치, 공개공지 접도유형이 주요 설계요소임을 인식하고 계획 및 설계시 반영하여야 할 것으로 판단된다. 또한 앞으로 이런 요인을 들을 반영하기 위해서는 건축법의 상세한 법적 기준 설정과 지구단위계획에서 세부지침 등이 상세하게 다루어져야 할 것이다. 최근 공개공지와 관련된 연구와 본 연구의 결과를 바탕으로 공개공지를 설계하고, 유지 관리한다면 공개공지 활용도를 높이고 도시공간의 공공성을 향상시킬 수 있는 것으로 기대된다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2012년도 추계학술대회 논문집
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• pp.258-264
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• 2012

The overall aim of this paper is to determine coupling loss factor of welding point between shell and cylinder using loss factor and structural loss factor. For this purpose, two kinds of loss factor were adopted. One is loss factor of each sub structure, another is structural loss factor based on the complex welded or assembled structure. Using these two parameters, it is possible to derive the coupling loss factor which represents characteristic condition of SEA theory. Coupling loss factor of conjunction in complex structure was expressed as power balance equation. The derived equation for a coupling loss factor has been simplified on the assumption of one way (uni-directional) power flow between multi-sub structures. Using these conditions, it is possible to find the equation of coupling loss factor expressed as above two loss factors. To check the effectiveness of above equation, this paper used two-stage application. The first approach was application between simple cylinder and shell. The next was adopted rotary compressor. Rotary compressor has three main conjunctions between shell and internal vibration part. This equation was applied to find out the optimum welding point with respect to reduce the noise propagation. It shows the effective tool to evaluate the coupling loss factor in complex structure.

• Journal of Advanced Marine Engineering and Technology
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• 제37권1호
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• pp.40-46
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• 2013

열전달 향상을 위하여 이차유동을 발생시켜 열전달을 증가시키는 방법에는 여러 가지가 있다. 본 연구에서는 수평채널에 다양한 형태의 립을 설치하여 유속을 변화시켰을 때의 열전달 및 압력강하 특성을 수치해석을 통하여 고찰하였다. 립은 수평채널의 아랫면에 설치하였고, 립의 높이는 5mm이다. 립이 $60^{\circ}$ 기울어지고 그루브도 설치된 경우 열전달 특성이 가장 우수하게 나타났는데, 이는 주유동이 립을 따라 흘러가면서도 유속이 어느 정도 유지되기 때문이다. 끊어진 립에서 주유동이 립의 저항을 적게 받으면서 압력강하가 가장 작게 나타났다. 모든 립의 형태에서 유속이 증가함에 따라 열전달이 향상되는 경향을 보였지만 성능계수는 감소하였다.

• 대한불안의학회지
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• 제8권2호
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• pp.99-105
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• 2012

Objective : The aim of this study is to evaluate the five-factor model of personality in patients with obsessive-compulsive disorder (OCD) related to obsessive-compulsive symptom severity and the distinct symptom subgroups. Methods : We recruited 95 patients with OCD and 116 normal controls in the study. We used the short version of Revised NEO Personality Inventory and the Yale-Brown Obsessive Compulsive Scale (Y-BOCS) for the assessment. Results : Patients with OCD showed significantly higher scores in neuroticism than normal controls. On multiple linear regression analysis, we found that agreeableness and conscientiousness were associated with the total Y-BOCS scores. On subscale analysis, agreeableness and neuroticism were associated with the obsession subscale scores and only conscientiousness was associated with the compulsion subscale scores. Furthermore, we found that patients who have contamination/cleaning or symmetry/ordering/counting/arranging as a main symptom presentation had significantly higher mean scores in conscientiousness than patients who have harm due to injury/violence/aggression as a main symptom presentation. Conclusion : In this study, we found that specific personality factors are associated with the obsessive-compulsive symptom severity. In addition, this is the first study to investigate the relationship between the personality factors in the five-factor model and the distinct symptom subgroups in OCD.

• International Journal of Computer Science & Network Security
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• 제21권7호
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• pp.119-124
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• 2021

Today, both sides of modern culture are decisively invaded by digitalization. Authentication is considered to be one of the main components in keeping this process secure. Cyber criminals are working hard in penetrating through the existing network channels to encounter malicious attacks. When it comes to enterprises, the company's information is a major asset. Question here arises is how to protect the vital information. This takes into account various aspects of a society often termed as hyper connected society including online communication, purchases, regulation of access rights and many more. In this research paper, we will discuss about the concepts of MFA and KBA, i.e., Multi-Factor Authentication and Knowledge Based Authentication. The purpose of MFA and KBA its utilization for human.to.everything..interactions, offering easy to be used and secured validation mechanism while having access to the service. In the research, we will also explore the existing yet evolving factor providers (sensors) used for authenticating a user. This is an important tool to protect data from malicious insiders and outsiders. Access Management main goal is to provide authorized users the right to use a service also preventing access to illegal users. Multiple techniques can be implemented to ensure access management. In this paper, we will discuss various techniques to ensure access management suitable for enterprises, primarily focusing/restricting our discussion to multifactor authentication. We will also highlight the role of knowledge-based authentication in multi factor authentication and how it can make enterprises data more secure from Cyber Attack. Lastly, we will also discuss about the future of MFA and KBA.

• 한국정보기술학회논문지
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• 제16권11호
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• pp.23-34
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• 2018

본 논문에서는 고효율 고역률 LED 조명장치용 전원공급장치를 제안한다. 제안한 전원공급장치는 풀브리지 다이오드 정류기와 플라이백 컨버터로 구성된 단일단 전력구조이며, 이에 따라 하나의 제어기 IC와 하나의 전력반도체스위치만을 사용하여 역률개선과 출력전압조정을 동시에 수행한다. 또한 제안한 전원공급장치는 회생스너버를 이용하여 주스위치의 전압스트레스와 스위칭손실을 감소시키며, 동기정류기를 이용하여 시스템 효율을 향상한다. 적용된 동기정류기는 새로운 전압구동형이며 동작과 구성이 간단하다. 본 논문에서는 역률개선부와 주전력변환부의 동작분석을 통하여 제안한 전원공급장치의 동작원리를 설명하고 동기정류기의 동작에 관하여 간략하게 설명한다. 또한 40W급 프로토타입 전력회로의 설계예시를 제시하며, 설계된 회로파라미터들에 의해 제작된 프로토타입의 실험 결과를 통하여 제안한 전원공급장치의 동작특성을 입증한다.

• 한국보육학회지
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• 제19권3호
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• pp.31-46
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• 2019

본 연구는 보육교사의 소진에 영향을 미치는 요인에 대해 종합적이고 객관적인 결과를 도출하고, 그들의 경험을 심도 있게 파악함으로써 현장에서 보육교사가 겪는 소진에 대해 더욱 심층적으로 파악하는 것을 목적으로 한다. 이를 위해 메타분석과 심층인터뷰를 활용한 혼합연구방법을 수행하였다. 연구결과 보육교사의 소진에 가장 큰 영향을 주는 요인은 조직특성의 보호요인으로 나타났으며, 이에 대한 개입과 예방은 어린이집 조직의 근무환경을 개선하는 등 환경적 접근이 더 효과적임을 의미한다. 또한 심층인터뷰를 통해 13개의 주제와 28개의 세부주제가 발견되었는데 메타분석 결과에서 유의미하게 나온 대부분의 요인이 심층인터뷰를 통해 재확인되었다. 그 중 영향력이 가장 크게 나온 하위 요인은 심리적 요인의 자아존중감으로 나타났다. 이러한 결과를 바탕으로 보육교사의 소진을 감소시키고 보육서비스의 질적인 향상을 도모하기 위해 보육환경의 일원화, 보육교사 양성교육과정 및 자격기준 강화, 평가인증제도의 재검토 등을 제언하였다.

• 대한기계학회논문집A
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• 제21권3호
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• pp.447-456
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• 1997

Stress intensity factor of semi-infinite parallel crack propagation with constant velocity in dissimilar orthotropic strip under out-of-plane clamped desplacement is investigated. Using Fourier integral transforms the boundary value problem is derived by a pair of dual integral equation and finally reduced to a single Wiener-Hopf equation. By applying Wiener-Hopf technique the equation is solved. Applying this result the asymptotic stress fields near the crack tip are determined, from which the stress intensity factor is obtained in closed form. The more the ratio of anisotropy or the ratio of bi-material shear modulus increase in the main material including the crack, the more the stress intensity factor increases. Discontinuity in the stress intensity factor is found as the parallel crack approaches the interface. In special case, the results of isotropic materials agree well with those by the previous researchers.

• 디지털융복합연구
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• 제6권2호
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• pp.41-53
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• 2008

This research is to redefine the concept of Good School and to validate an effective Good Secondary School Scale in Kyung-gi Province and Seoul. As statistical methods, SPSS 13.0 and AMOS 5.0 were used. Item Analysis and Exploratory Factor Analysis(EFA) were conducted to test the reliability of items and the factor structure. And Confirmatory Factor Analysis(CFA) was conducted to test the validity and fitness of the Good School Scale. The outcomes are as follows: First, six factors(school environment, curriculum, teacher, school-based management system, director) will increase the good schooling effectiveness. Second, As a result of Confirmatory Factor Analysis(CFA), the goodness of fit indices(GFI AGFI, CFI, RMSEA) demonstrate statistically significance and fitness of the model. The final Good School Scale supports 6 Good School Factors obtained in main test. Therefore, we can say that this scale can be used as a valid instrument to measure a real Good Schooling Effectiveness at the secondary school situation in Korea.