• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권3호
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• pp.1321-1332
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• 2016

Wireless sensor networks (WSN) are self-organized networks that typically consist of thousands of low-cost, low-powered sensor nodes. The reliability and availability of WSNs can be affected by faults, including those from radio interference, battery exhaustion, hardware and software failures, communication link errors, malicious attacks, and so on. Thus, we propose a novel multi-agent fault tolerant system for wireless sensor networks. Since a major requirement of WSNs is to reduce energy consumption, we use multi-agent and mobile agent configurations to manage WSNs that provide energy-efficient services. Mobile agent architecture have inherent advantages in that they provide energy awareness, scalability, reliability, and extensibility. Our multi-agent system consists of a resource manager, a fault tolerance manager and a load balancing manager, and we also propose fault-tolerant protocols that use multi-agent and mobile agent setups.

• 한국콘텐츠학회논문지
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• 제21권1호
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• pp.684-697
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• 2021

본 연구는 우울, 불안, 충동성의 청소년의 개인 심리적 위험요인이 스마트폰 중독(일상장애, 가상지향, 내성, 금단)과 자아탄력성(활력성, 낙관성, 호기심, 대인관계)에 미치는 영향을 규명하고자 함에 있다. 이러한 검증을 통해 청소년들의 스마트폰 중독과 관련된 개인 심리적 위험요인들과 자아탄력성, 스마트폰 중독의 통합적 모형이 타당한지 알아보고, 이를 통해 청소년들의 스마트폰 중독을 예방하고 관련 문제를 해결하기 위한 방안을 제시하는데 본 연구의 목적이 있다. 이러한 연구목적을 달성하기 위해 서울과 수도권에 재학 중인 청소년 356명을 연구대상으로 2019년 8월 1일부터 9월 30일까지 약 2개월간 조사하여 결과를 분석하였다. 본 연구의 연구결과는 다음과 같다. 첫째, 청소년의 "스마트폰 중독요인(우울, 불안, 충동성)은 청소년의 자아탄력성(활력성, 낙관성, 호기심, 대인관계)에 부(-)의 영향을 미치는 것으로 나타났다. 둘째, 청소년의 "스마트폰 중독요인(우울, 불안, 충동성)은 청소년의 "스마트폰 중독(일상장애, 가상지향, 내성, 금단)"에 정(+)의 영향을 미치는 것으로 나타났다. 셋째, 청소년의 "자아탄력성(활력성, 낙관성, 호기심, 대인관계)"은 "스마트폰 중독(일상장애, 가상지향, 내성, 금단)"에 부(-)의 영향을 미치는 것으로 나타났다. 본 연구의 의의는 스마트폰 중독에 영향을 미치는 개인 심리적 위험요인을 살펴봄과 함께 자아탄력성을 활용하여 스마트폰 중독에 미치는 영향을 미시적으로 분석하여 청소년들의 스마트폰 중독을 예방하고 관련 문제를 해결하기 위한 방안을 제시하였다는데 연구의 의의가 있다.

• 의학교육논단
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• 제16권2호
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• pp.77-87
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• 2014

The purpose of this study was to investigate the influence of demographic data, academic demand, perfectionism, and academic failure tolerance on academic burnout of medical and graduate students at Yeungnam University. A mixed method study was conducted. Fourteen students participated in a focus group interview and 302 students, including 151 medical students and 151 graduate students, completed a survey, which addressed the factors of academic burnout, academic demand, perfectionism, and academic failure tolerance. There were significant differences in the academic burnout by age and year in school. The 2nd year medical & graduate students experienced significantly higher academic burnout than the other students. Multiple regression analysis revealed that academic burnout of medical and graduate students was significantly affected by academic demand (p<0.001), self-oriented and socially-prescribed perfectionism (p<0.001, p<0.01), and feeling and behavior, which were sub-factors of academic failure tolerance (p<0.05, p<0.01). It is suggested that comparative studies with other student groups, a longitudinal study of medical and graduate students, and a prospective study of coping styles and methods of preventing academic burnout need to be conducted.

• 한국융합학회논문지
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• 제9권2호
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• pp.33-42
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• 2018

본 연구의 목적은 간호 대학생의 데이트 폭력 가해경험, 폭력 허용도, 사회적 문제해결능력의 정도를 확인하고, 이들 간의 관계를 파악하는 것이다. 충청권 소재 5개 대학교에서 편의 표집된 간호학과 대학생 219명에게 자가보고 형식의 질문지를 통해 자료를 수집하였다. 자료 분석은 SPSS 20.0프로그램을 이용하여 t-test, ${\chi}^2$ test, Partial correlation coefficients를 시행하였다. 그 결과, 간호대학생의 데이트 폭력 가해경험이 높을수록 데이트 폭력 허용도가 높고(r=0.31, p<.001), 데이트 폭력 허용도가 높을수록 사회적 문제해결능력이 부정적임(r=-0.26, p<.001)을 알 수 있었고, 학과 만족도와 음주 정도가 데이트 폭력 가해와 관련이 있는 것으로 나타난다. 따라서 데이트 폭력을 예방하기 위해 데이트 폭력 허용도에 대한 올바른 인식과 사회적 문제해결능력을 함양시키기 위한 데이트 폭력 예방 교육 및 훈련 프로그램을 마련하는데 합리적인 근거를 제시하였다.

• 융합정보논문지
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• 제8권3호
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• pp.115-125
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• 2018

본 연구의 목적은 대학생의 데이트 폭력 허용도 및 데이트 폭력 인식 정도를 살펴보고 관련 요인들을 대상자의 일반적, 이성교제 및 성 관련 교육 경험 특성을 중심으로 파악하는 것이다. 충남 에 소재한 B 대학교 남녀 대학생으로부터 수집된 설문지 365부를 SPSS WIN 22.0을 이용하여 기술통계, t-검정, 상관관계 분석을 하였다. 연구 결과, 대학생들의 데이트 폭력 허용도는 매우 낮았고, 폭력 인식은 전반적으로 높은 것으로 나타났다. 일반적, 이성교제 및 성 관련 교육 경험 특성에 따른 데이트 폭력 허용도와 폭력 인식 정도는 통계적으로 유의한 차이를 보이지 않았으나 데이트 폭력 허용도와 데이트 폭력 인식은 부적 상관관계를 보여 데이트 폭력에 대한 인식이 높을수록 데이트 폭력 허용도가 낮은 것으로 나타났다. 이와 같은 결과를 토대로 추후 연구의 방향성과 데이트 폭력 예방을 비롯한 실천적 개입에의 함의를 제시하였다.

• 대한산업공학회지
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• 제19권3호
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• pp.123-137
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• 1993

In this paper, an integrated approach is proposed to generate gouging-free Cartesian tool paths for machining sculptured surfaces from 3D measurement data. The integrated CAD/CAM system consists of two modules : offset surface module an Carteian tool path module. The offset surface module generates an offset surface of an object from its 3D measurement data, using an offsetting method and a surface fitting method. The offsetting is based on the idea that the envelope of an inversed tool generates an offset surface without self-intersection as the center of the inversed tool moves along on the surface of an object. The surface-fitting is the process of constructing a compact representation to model the surface of an object based on a fairly large number of data points. The resulting offset surtace is a composite Bezier surface without self-intersection. When an appropriate tool-approach direction is selected, the tool path module generates the Cartesian tool paths while the deviation of the tool paths from the surface stays within the user-specified tolerance. The tool path module is a two-step process. The first step adaptively subdivides the offset surface into subpatches until the thickness of each subpatch is small enough to satisfy the user-defined tolerance. The second step generates the Cartesian tool paths by calculating the intersection of the slicing planes and the adaptively subdivided subpatches. This tool path generation approach generates the gouging-free Cartesian CL tool paths, and optimizes the cutter movements by minimizing the number of interpolated points.

• 한국생활과학회지
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• 제23권1호
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• pp.47-61
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• 2014

The purpose of this study was to identify the relationship among financial debt burden, psychological factors and financial stress. Data was collected by surveying 450 individuals who were over twenty years old, and 384 were used for the analysis. As the result, first, number of sources of debt, use of each debt, marital status/double income, housing, debt amount and financial stress were found to be significantly different among three groups(debt free, non risky, risky). In addition, marital status/double income, gender, housing and income were found to significantly influence to the probability of being one of the three groups. Second, level of debt burden, age, employment and income were found to significantly influence to financial stress, while psychological factors such as risk tolerance and self-control were not. It might be noteworthy that people in debt were likely to have higher level of stress, while the older, employed, and having higher income were likely to have lower level of stress. This study would provide useful information in terms of debt policy to relieve the financial stress.

• 디지털산업정보학회논문지
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• 제19권2호
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• pp.147-160
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• 2023

Unlike other currencies, cryptocurrency is not a currency used for general transactions, but is currently applied to various investment assets and its scope is expanding. The purpose of this study is to the effect of personal characteristics on investment intention. As a theoretical background, it was verified by applying the Extended Technical Acceptance Model (ETAM). self-confidence propensity, bandwagon propensity, risk tolerance propensity, network externality, attitude, and Investment intention were composed of variables. The research method collected data from 871 people who had experience in cryptocurrency investment through a survey and analyzed it after excluding the data of 71 people who were judged to be inappropriate. The structural equation modeling method using AMOS was used. As a result of this paper, five hypotheses were accepted as statistically significant. This study concluded that self-confidence propensity, bandwagon propensity, risk tolerance propensity, network externality, and attitude had statistically significant effects on Investment intention. In this respect, this study will be able to provide useful information for cryptocurrency research.

• 한국철도학회논문집
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• 제9권6호
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• pp.725-731
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• 2006

Hot Standby sparing system detecting faults by using software, and being tolerant any faults by using Hardware Redundancy is difficult to perform quantitative reliability prediction and to detect real time faults. Therefore, this paper designs Hot Standby sparing system using hardware basis self checking logic in order to overcome this problem. It also performs failure mode analysis of Hot Standby sparing system with designed self checking logic by using FMEA (Failure Mode Effect Analysis), and identifies reliability assessment of the controller designed by quantifying the numbers of failure development by using FTA (Fault Tree Analysis)

• International Journal of Human Ecology
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• 제17권2호
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• pp.31-42
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• 2016

We examine the self-control problems of U.S households and their effects on households' retirement preparedness based on the Behavioral Life-Cycle Hypothesis. Using the 2010 Survey of Consumer Finances dataset, the level of retirement adequacy was estimated with income replacement ratio (IRR), and only 42% of households were adequately prepared for retirement. Results from logistic regression analysis indicated that households with loan payment and saving self-control problems were less likely to be prepared adequately for retirement compared to those without such problems. Age, education, race/ethnicity, marital status, employment status, retirement plans, expected retirement age and risk tolerance were significantly related to retirement preparedness. This study provides financial educator and researchers with suggestions on how to help household make a better retirement plan.