• Nuclear industry
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• v.35 no.7
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• pp.12-18
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• 2015

원자력안전위원회는 9월 24일 제45차 회의에서 월성 원전 1호기와 고리 원전 1호기를 대상으로 추진해온 스트레스 테스트를 마무리하고 국내 가동 중인 전체 원전으로 확대하여 극한 자연 재해에 대한 원전의 안전성을 확인하기 위한 "가동 원전 스트레스 테스트 추진 계획"을 확정하였다. 최근 7월 24일 상업 운전을 시작한 신월성 원전 2호기까지 포함하여 원자로 기준으로 총 22개 원전이 내년부터 시작될 스트레스 테스트의 대상이 된다.

• Journal of Korea Port Economic Association
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• v.39 no.2
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• pp.97-110
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• 2023

This study examines the effect of macroeconomic shocks on the financial stability of the Korean shipping industry. Using Firth logistic regression model, this study estimates the default probability of a shipping company. The results from a default prediction model suggest that total assets are negatively correlated with default probability, while total debt is positively correlated with default probability. Based on the results from a default prediction model, this study investigates the effect of macroeconomic shocks, namely total assets, sales, and total debt shocks, on a shipping company's default probability. The stress test results indicate that a decrease in sales and total assets significantly deteriorates the financial stability of a shipping company.

• 건강소식
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• v.37 no.10
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• pp.6-7
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• 2013

많은 사람이 나도 모르게 스트레스 테스트, 우울증 테스트를 해보고 '나도 그랬어'라고 공감하지만 적극적으로 개선하고자 하지 않는다. 이제는 스스로의 정신건강을 돌아보고 건강하고 행복한 삶을 지켜나가려는 움직임이 필요하다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.3
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• pp.103-108
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• 2016

In daily life, humans get stress very often. Stress is one of the important factors of healthy life and closely related to the quality of life. Too much stress is known to cause hormone imbalance of our body, and it is observed by the brain and bio signals. Based on this, the relationship between brain signal and stress is explored, and brain signal based stress index is proposed in our work. In this study, an EEG measurement device with 32 channels is adopted. However, only two channels (FP1, FP2) are used to this study considering the applicability of the proposed method in real enveironment, and to compare it with the commercial 2 channel EEG device. Frequency domain features are power of each frequency bands, subtraction, addition, or division by each frequency bands. Features in time domain are hurst exponent, correlation dimension, lyapunov exponent, etc. Total 6 subjects are participated in this experiment with English sentence reading task given. Among several candidate features, ${\frac{{\theta}\;power}{mid\;{\beta}\;power}}$ shows the best test performance (70.8%). For future work, we will confirm the results is consistent in low price EEG device.

• Journal of the Korean Society for information Management
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• v.27 no.4
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• pp.259-281
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• 2010

The purpose of the study is to prove the effectiveness of the bibliotherapy in decreasing the stress among the elderly. A 4-week program was developed and provided in 2 types, group meeting and individual telephone contact, for the old over 60 years. A total of 121 participants completed the program offered at 16 institutions. Participants' stress perception and stress response were measured prior to the bibliotherapy and post-tests were followed. 17 hypotheses were tested statistically by t-test and ANOVA. The followings are the main results. Both types of the bibliotherapy are effective in decreasing the stress of the old. Group meeting program is more effective than individual contact program. There were no significant effectiveness difference among the groups divided by sex, age, and education level. Bibliotherapy effectiveness is differ among groups divided by the initial stress perception level. Obviously, bibliotherapy was more effective for the old in high stress level than those in low stress level. Based on the results, recommendations are suggested to promote the bibliotherapy program.

• Journal of Korean Society of Steel Construction
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• v.18 no.6
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• pp.793-804
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• 2006

Various PSC and steel-concrete composite railway bridges are being developed for short-medium spans with structural and economic efficiency. According to the design concept, the prestressed composite girder bridge has the advantages of being lightweight and having low girder depth, with the capacity for long spans. However, the dynamic behavior under a passing train is one of the critical issues concerning these railway bridges designed with more flexibility. Therefore, it is very important to evaluate the modal parameters before performing dynamic analyses. In this paper, real-scale prestressed composite girders were fabricated as a test model and modal testing was carried out to evaluate modal parameters including natural frequency and modal damping ratio. During the modal testing, a digitally controlled vibration exciter as well as an impact hammer was applied to obtain frequency-response functions, and the modal parameters were also evaluated after the fracture of test models. With application of reliable properties from modal tests, the estimation of dynamic performances of prestressed composite girder railway bridges can be obtained from various parametric studies on dynamic behavior under the passage of a moving train.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.1033-1035
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• 2007

최근 PDA와 휴대폰 등 모바일 디바이스의 급격한 증가로 모바일 응용 SW 개발이 주목을 받고 있다. 다양한 방법과 기술들이 모바일 응용 SW 개발을 지원하기 위해 개발되었으며, 다양한 언어가 J2ME 또는 Brew 플랫폼에서 SW 개발을 위해 제시되었다. 그러나 이러한 환경에서 SW 테스트는 큰 관심을 받지는 못하였다. 그 동안 모바일 응용 SW의 기능 테스트에 대한 몇몇 연구 성과들이 발표되어 왔고, 성능, 사용성, 스트레스 테스트 등에 관련된 연구들이 주로 진행되어 왔다. 특히 단위 테스트는 개발자의 역량에 의존하는 방식으로 진행되어 왔다. 본 논문에서는 모바일 응용 SW를 비즈니스로직 측면과 GUI 측면으로 구분하여 각각에 대한 단위 테스트 방법을 제시하고자 한다.

• Proceedings of the Ginseng society Conference
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• 1984.09a
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• pp.97-105
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• 1984

Effect of water extract of red ginseng (Panax ginseng C.A. Meyer) from Nagano prefecture on (1) forced exercise in mice using rope climbing test, (2) extinction of memory in hanging stressed mice and rectal temperature during the exposure to hanging stress, (3) sex and learning behavior of chronic hanging stressed mice, (4) sex cycle in the adult female mice using chronic hanging stress, and (5) motor coordination and one trial passive avoidance response in $40\%$ alcohol administered mice using rotar-rod and step-through tests, were studied. Drugs tested were given orally. (1) When it was given before the forced exercise, it potentiated the performance of the forced exercise. When it was given just after the forced exercise once a day for 2 weeks, it protected the mice against the reduction of the performance on the forced exercise. (2) When it was given just after the stress once a day for 4 days, it delayed the extinction of passive avoidance response in both step through and stepdown tests, and protected the stressed mice against the decrease in rectal temperature slightly. (3) It protected the stressed mice against the decrease of sex behaviour and the increase in the failure of performance of passive avoidance response, and delayed the extinction of passive avoidanc

• Journal of IKEEE
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• v.25 no.3
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• pp.578-583
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• 2021

This paper describes acceleration tests for reliability of semiconductors. It also describes AEC-Q100, international test standard for reliability of automotive semiconductors. Semiconductors can be used for dozens of years. So acceleration tests are essential to test potential problems over whole period of product where test time is minimized by applying intensive stresses. AEC-Q100 is a typical acceleration test in automotive semiconductors, and it is designed to find various failures in semiconductors and to analyze their causes of occurance. So it finds many problems in design and fabrication as well as it predicts lifetime and reliability of semiconductors. AEC-Q100 consists of 7 test groups such as accelerated environmental stress tests, accelerated lifetime simulation tests, package assembly integrity tests, die fabrication reliability tests, electrical verification tests, defect screening tests, and cavity package integrity tests. It has 4 grades from grade 0 to grade 3 based on operational temperature. AEC-Q101, Q102, Q103, Q104, and Q200 are applied to discrete semiconductors, optoelectronic semiconductors, sensors, multichip modules, and passive components, respectively.

• 한국IT서비스학회:학술대회논문집
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• 2007.11a
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• pp.378-381
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• 2007

최근 PDA와 휴대폰 등 모바일 디바이스의 급격한 증가로 모바일 응용 SW 개발이 주목을 받고 있다. 다양한 방법과 기술들이 모바일 응용 SW 개발을 지원하기 위해 개발되었으며, 다양한 언어가 J2ME 또는 Brew 플랫폼에서 SW 개발을 위해 제시되었다 그러나 이적한 환경에서 SW 테스트는 큰 관심을 받지는 못하였다. 그 동안 모바일 응용 SW의 기능 테스트에 대한 몇몇 연구 성과들이 발표되어 왔고, 성능, 사용성, 스트레스 테스트 등에 관련된 연구들이 주로 진행되어 왔다. 본 논문에서는 모바일 응용 SW를 비즈니스 로직 측면과 GUI 측면으로 구분하여 각각에 대한 테스트 방법을 제시하고자 한다.