• 가정과삶의질연구
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• 제25권3호
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• pp.119-135
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• 2007

The purpose of this study is to find out the level of digital stress that people experience and to investigate the effects of socio-economic variables on that. To collect data, structured questionnaire was developed and 1,200 questionnaires were distributed through internet. There were 2 dimensions in this study to examine digital stress. First dimension was about the devices themselves: computers and the other digital goods. Second dimension was about the time digital stress occurring in consumers' decision-making process: purchasing and using. Based on Yeo&Kim(2004), sub-dimensions of purchasing and using aspects were chosen. 5 sub-dimensions in purchasing side were new technology, cost, variety of alternatives, warranty service, and informational problem 6 sub-dimensions in using field were mal(or impaired)-functioning. physical aspects, immaturity in use, pressure to use, addiction to use, and informational problem. As independent variables, sex, age, educational level, digitalization acceptability and computer usability were used. The overall level of digital stress was around the average point which was not as high as expected. Digital stress of purchasing was higher than that of using. First, in purchasing aspects, the level of digital stress was relatively high in cost, variety of alternatives and warranty service. Hence, clear communications with consumers about the distinctive aspects and cost of digital devices in market are needed. Secondly, in using side, mal-functioning and physical aspects were relatively more powerful stressors. In the other words, the more serious problems were not from the characteristics of individual consumers but from those of products. Producers should put their best efforts to reduce imperfection (defectiveness) and develop user-friendly digital devices. Also, users' individual efforts to overcome the problems that can be solved privately are necessary. Finally, it was discovered that sex and computer usability were very important variables on digital stress. To extend computer usability of consumers and get over digital illiteracy, it is essential to expand the paths to give chances for people to contact with computers and other digital goods. Still there are lots of people whore computer-illiterate or low-skilled at computers. In policies or educational programs made by government, communities, or schools, more attention should be paid to the digitally vulnerable groups.

• Journal of Biosystems Engineering
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• 제33권6호
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• pp.416-422
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• 2008

This study was performed to design and construct a digital soil shear stress sensor in order to replace the conventional devices for measuring soil shear property. The developed digital shear stress measuring device can store measured data with GPS position information as a vector format into a computer. Based on the experiments at various field conditions, the measuring characteristic of the device was quite similar to that of a conventional device, SR-2 that has been a major tool to measure the soil shear property. It was concluded that the digital shear stress measuring device was an effective and comprehensive sensor for measuring soil shear property.

• 소성∙가공
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• 제16권4호
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• pp.323-328
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• 2007

The residual stress in axial direction of the steel wires has been measured by using a method based on the combination of the focused ion beam(FIB) milling and digital image correlation(DIC) program. The residual stress is calculated from the measured displacement field before and after the introduction of a slot along the steel wires. The displacement is obtained by the digital correlation analysis of high-resolution scanning electron micrographs, while the slot is introduced by FIB milling with low energy beam. The experimental procedures are described and the feasibilities are demonstrated in steel wires fabricated with different conditions. It reveals that the tensile residual stress is formed in all steel wires and this is strongly influenced by the fabrication conditions.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2007년도 춘계학술대회 논문집
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• pp.241-245
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• 2007

The residual stress in axial stress in the axial direction of the steel filaments has been measured by using a method based on the combination of the focused ion beam (FIB) and high resolution strain mapping program (VIC-2D). That is, the residual stress was calculated from the measured displacement field before and after the introduction of a slot along the steel filaments. The displacement was obtained by the digital correlation analysis of high-resolution scanning electron micrographs, while the slot was introduced by FIB milling with low energy beam. The present measurement revealed that the residual stress within 8% of the magnitude was persistent in the steel filaments fabricated.

• 디지털융복합연구
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• 제16권8호
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• pp.1-10
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• 2018

디지털 기술 발달에 따라 디지털 범죄가 크게 증가하였으며, 이를 해결하기 위한 디지털 포렌식 분야 역시 꾸준히 성장하고 있다. 특히 디지털 포렌식 업무를 담당하는 디지털증거분석관의 중요성과 업무 비중이 높아지고 있지만, 기존 디지털 포렌식 관련 연구는 기술적 측면에 편향되어 있으며, 수행 인력 관련 연구는 부족한 실정이다. 이에 본 연구는 디지털증거분석관의 이직 의도 실증을 위해 기존 이직 의도 관련 연구에 다수 활용된 직무스트레스 등의 요인을 적용하여 연구모델을 설정하였다. 최종 124명 디지털증거분석관을 대상으로 설문을 진행하여, Smart PLS 3.0으로 분석하였다. 분석결과 디지털증거분석관의 직무스트레스는 직무만족과 조직몰입 및 이직 의도에 유의미한 영향을 확인하였고, 본 연구 결과로 디지털증거분석관의 직무스트레스 및 이직 의도 개선에 유효한 시사점을 제공할 수 있을 것이다.

• 산업융합연구
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• 제20권12호
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• pp.117-124
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• 2022

본 연구는 간호대학생의 코로나19 스트레스와 디지털중독 간의 관계에서 대인관계능력의 매개효과를 확인하기 위하여 수행되었다. 2개 도시의 대학교 간호학과 1~2학년 학생 207명을 대상으로 2022년 4월 1일부터 4월 30일까지 온라인 설문조사로 자료수집을 진행하였다. 수집된 자료는 SPSS/WIN 22.0과 AMOS 22.0 프로그램을 이용하여 분석하였다. 분석 결과 코로나19 스트레스는 대인관계능력(β =.21, p =.015)과 디지털중독(β =.20, p =.003)에 대해 유의한 직접 효과가 있었다. 그러나 간접효과는 유의하지 않아 코로나19 스트레스와 디지털중독 사이에서 대인관계능력의 매개효과는 없는 것으로 확인되었다(β =.07, p =.314). 본 연구결과를 토대로 디지털중독에 영향을 미치는 요인을 확인하고 디지털중독의 예방 및 관리 프로그램 개발 연구를 제언한다.

• 한국멀티미디어학회논문지
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• 제23권4호
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• pp.574-580
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• 2020

Stress induces change to the body functions and causes chronic problems such as worsening a disease. Thus, humans want to evade anxiety and would try any means to reduce stressful situations. Generally, a person would handle their stress by either regulating their emotions or merely coping with the situation, for which the former is most widely used. Our research aims to effectively reduce stress by using the emotional response structure developed by Plutichik and the vitalization method. We extracted the relevant components of the stress-reduction method that would be applicable in any space using digital technologies such as sensors, IoT, and augmented reality. An architect or designer may incorporate these structural components into any structure to effectively reduce people's stress. The research aims to provide a new perspective of architectural space and to show applications of the stress-reducing architectural spaces, which should also fulfill the people's needs. Further research is needed to develop an automatic system to utilize spatial components more effectively.

• Nuclear Engineering and Technology
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• 제54권9호
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• pp.3205-3214
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• 2022

The aim of this study is to provide a clear and accessible method to obtain accurate true-stress strain data, and to extend the limited material data beyond the ultimate tensile strength (UTS) for AISI 304L. AISI 304L is used for the outer construction for some types of nuclear transport packages, due to its post-yield ductility and high failure strain. Material data for AISI 304L beyond UTS is limited throughout literature. 3D digital image correlation (DIC) was used during a series of uniaxial tensile experiments. Direct method extracted data such as true strain and instantaneous cross-sectional area throughout testing such that the true stress-strain response of the material up to failure could be created. Post processing of the DIC data has a considerable effect on the accuracy of the true stress-strain data produced. Influence of subset size and smoothing of data was investigated by using finite element analysis to inverse model the force displacement response in order to determine the true stress strain curve. The FE force displacement response was iteratively adapted, using subset size and smoothing of the DIC data. Results were validated by matching the force displacement response for the FE model and the experimental force displacement curve.

• 한국주조공학회지
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• 제40권1호
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• pp.1-6
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• 2020

Many studies involving a thermal stress analysis using computational methods have been conducted, though there have been relatively few experimental attempts to investigate thermal stress phenomena. Casting products undergo thermal stress variations during the casting process as the temperature drops from the melting temperature to room temperature, with gradient cooling also occurring from the surface to the core. It is difficult to examine thermal stress states continuously during the casting process. Therefore, only the final states of thermal stress and deformations can be detemined. In this study, specimens sensitive to thermal stress, were made by a casting process. After which the residual stress levels in the specimens were measured by a hole drilling method with Electron Speckle-Interferometry technique. Subsequently, we examined the thermal stresses in terms of deformation during the casting process by means of a numerical analysis. Finally, we compared the experimental and numerical analysis results. It was found that the numerical thermal stress analysis is an effective means of understanding the stress generation mechanism in casting products during the casting process.

• 한국빅데이터학회지
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• 제7권1호
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• pp.29-36
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• 2022

감정 노동 및 서비스업 종사자의 급격한 증가에 따른 감정노동자의 스트레스 및 우울증 유병률이 증가하고 있다. 하지만, 현재 감정노동자의 정신건강 관리는 스트레스 상황 당시의 정서반응을 고려하기 어렵고 개인의 기저 상태가 반영되지 않아 기존 정신건강 관리의 한계가 존재한다. 본 연구에서는 개인 맞춤형 스트레스 위험 관리 솔루션인 멘탈 헬스케어 디지털 트윈 솔루션 기술을 제시한다. 감정노동으로 인한 정신건강 위험 관리를 위해, 정서/신체반응 및 환경 등의 개인별 스트레스 위험요인을 다양한 모달리티로 추출하고 가상 공간에서 동적 객체의 동기화/모델링을 통하여 스트레스 위험도를 정밀 예측하는 솔루션 탐색 시뮬레이션을 수행한다. 사용자에게 맞는 인터벤션을 제공하여, 감정노동자의 환경에 맞게 모달리티와 객체의 구성이 가능하고 사용자의 피드백에 따라 개선 가능한 개인 맞춤형 정신건강 위험 예측을 위한 멘탈 헬스케어 디지털 트윈 솔루션을 제공한다.