• Journal of the Korea Convergence Society
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• v.8 no.2
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• pp.235-241
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• 2017

This study aimed to help the college students majoring in beauty to have interests and manage the functional areas of scalp and hair by accurately identifying the condition of scalp and hair and realizing the convergence management habit and subjective symptoms for the condition. The study conducted a survey on 160 beauty major college universities in their 20s living in the Jeonnam area by asking the subjects to directly write the answers. The study found that many subjects had combination type of scalps and hair problems of split ends and thin hair, and recognized that their hair was damaged. They answered that frequent dyeing and perm caused the damage and they were using the shampoo for damaged hair to prevent hair damage. Regarding the observable symptoms on scalp and hair, it was identified that self-perception was higher as the interest in scalp was high, which influenced age and sleeping time.

• Journal of Convergence for Information Technology
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• v.8 no.3
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• pp.53-62
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• 2018

This study aims to find a program that may positively contribute to the promotion of periodontal health. The investigation is performed with 201 periodontal disease patients visited to denial hospitals and the anonymous self-filling survey. The result shows that Significant variables influential to the quality of life related to the oral health are revealed to be he awareness on periodontal diseases, the oral hygienic product, the sleep amount and the age. Therefore, it is considered that consultations suitable to each patient condition are required to define the criticalities of stress management capacity and responsive measure.

• Journal of Convergence for Information Technology
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• v.9 no.6
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• pp.130-139
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• 2019

This study investigates the future world of The Perfect Society (1967), science fiction written by Yunsung Moon that was a very rare science fiction publication in the 1960s. In The Perfect society, the main character Woo Sungoo, who was chosen to survive in a sleeping capsule as a representative of $20^{th}-century$ human beings, wakes in the $22^{nd}$ century where only women remain. He experiences this female utopia and finds that this world still contains as much abnormal antipathy to the others and absolute autocracy as the 20th-century world he remembers even though the future people succeed in overcoming the past problems like famine and pollution. The author warns that science alone without humanistic insight in a unity-oriented society cannot settle the human's fate; rather, it only changes the aspects of human conflict.

• Sleep Medicine and Psychophysiology
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• v.6 no.1
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• pp.61-67
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• 1999

Objectives: The aim of this study was to examine the impact of shift work on psychological, physical and social adjustment in nurses. Methods: Two hundred ninety-nine female nurses(179 shift worker, 120 non-shift worker) filled out a questionnaire, which consisted of fifty-six items including demographic characteristics. Subjective ratings of psychological, physical, social and sleeprelated distresses were assessed with a visual analogue scale(100mm). Results: Shift work exerted significantly negative impacts on all psychological, physical, social and sleep-related variables of the shift work nurses. The subjective perception about psychological and physical health of shift work nurses was significantly negative as compared to that of non-shift work nurses. Shift work nurses complained of more shift work related social dysfunction and limited social activity. Shift work nurses were also suffering from significant sleep difficulties as compared to non-shift work nurses. Conclusions: This study suggests that shift work can exert a negative impact on psychological and physical health of nurses as it can cause disturbances of the normal circadian rhythms of the psychophysiological functions, beginning with the sleep-wake cycle. Shift work can also cause difficulties in maintaining the usual relationships both at family and social levels. These results may suggest that we need appropriate coping strategies to overcome adverse effects of shift work.

• Journal of Korean Society of Environmental Engineers
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• v.22 no.1
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• pp.159-167
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• 2000

In recent years, combined and separated sewer overflows (CSOs, SSOs) have been recognized as a significant pollution problem. To solve this problem a series of experiments were performed in a small scale Rapid Floc Settler (RFS) device to determine its ability in removing micro particles and dissolved materials from polluted waters. The RFS device is a compact physico-chemical wasterwater treatment system. Polyacrylamide (PAM) is used as a coagulant for treating stormwater in the RFS. The results of Jar test showed that PAM could be an excellent coagulant as compared with aluminum sulfate. and ferric chloride. In several experimental conditions, the influence of different variation parameters was tested to measure the efficiency of the RFS. Tests have been carried out with typical CSOs concentrations (50~1.000mg SS/L). The treatment efficiency with regard to SS and COD, which can be obtained at an overflow rate of $130m^3/m^2/day$, are 90% and 80%, respectively. Comparing other sedimentation technologies with RFS, the overflows rate of RFS is ten times faster. The distribution of particle size and number were analyzed. The RFS is suitable for the treatment of CSOs and also the removal of settleable and dissolved materials in urban stormwater runoff.

• Journal of The Korean Association For Science Education
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• v.24 no.6
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• pp.1118-1130
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• 2004

This article aims to (a) investigate children's images of a scientist's life style by comparing children's drawings about a scientist's schedule with those about a company employee's schedule in a weekday and on Sunday; and (b) examine the usefulness of 'Drawing A Scientist's Schedule (DASS)' test as a new instrument of learners' conceptions of a scientist and his/her work. To do those, thirty sixth- grade children participated in this study. The children, 15 boys and 15 girls, were selected from a classroom of an elementary school located in Gongju city. The children's drawings were analyzed in conjunction with individual interviews. The interviews facilitated the clarification of any ambiguous attributes of the drawings by questioning after their completion. Several significant conclusions can be drawn from this work: First, the children conceived that a scientist has more mandatory time, and less necessary and leisure time than does a company employee. Interestingly, many children thought that a scientist has similar life style on Sunday to that in a weekday, unlike a company employee. Second, in case of necessary time use in a weekday and on Sunday, the difference between a scientist and a company employee results from their sleeping time. Also, the children showed more various conceptions of a scientist's sleeping time than those of a company employee's sleeping time. Third, in case of mandatory time use, the children conceived that a scientist spends more time for his/her occupational work and less time for his/her housework activities than does a company employee. Fourth, the children's drawings showed that there is difference between a scientist's and a company employee's leisure time use and activities. Finally, the DASS test indicated its possibility and usefulness as an instrument for investigating learners' images on a scientist and his/her work. The instrument exhibited several distinctive children's conceptions that is difficult in identifying by using the DAST, a popular instrument.

• Proceedings of the Korean Nuclear Society Conference
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• 1998.05b
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• pp.363-368
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• 1998

고리 1호기 주요기기들에 대한 수면평가 과정에서 원자로 압력용기의 중성자 조사취화에대한 잔여수명평가를 정량적으로 수행하였다. 그 결과 가압열충격 기준온도(R $T_{PTS}$)가 운전년수 34년경에 심사기준온도를 초과할 것으로 예측되어 연장운전 추진 시 선결되어야 할 과제로 인식되었다. 이에 따라 USNRC 가압열충격 규제지침서에 의한 상세 가압열충격 평가연구를 수행하고 있다. 본 논문에서는 원자로 압력용기 가압열충격 현상에 대해 간략히 설명하고 가압열충격 평가의 목적과 방법에 대하여 소개하였다. 더불어 현재 수행중인 고리 1호기 원자로 압력용기 가압열충격 평가의 일부로 수행한 계통 열수력해석과 확률론적 파괴역학 해석의 결과를 제시하고 가압열충격 위험도를 완화하기 위한 조치사항들에 대하여 검토하였다.다.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2001.05a
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• pp.160-165
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• 2001

In this study, the effects on hydraulic characteristics are discussed as the permeable underlayer width of the rubble mound structure changes. A series of hydraulic experiments were performed and wave run-up, reflection and set-up were investigated. Results indicated that wave run-down was affected by the water out from the permeable underlayer during down-rush. As the width increased, relative wave run-up decreased.

• Electronics and Telecommunications Trends
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• v.21 no.2 s.98
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• pp.66-73
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• 2006

PC-to-PC 또는 PC-to-Phone에서 구현되었던 초기 VoIP 서비스의 낮은 음성 품질은 기존 유선 전화서비스와 경쟁이 되지 않는 것으로 인식되었고 규제의 대상에서 제외되었다. 그러나 기술의 발전에 따라 향상된 품질의 음성서비스 및 다양한 응용서비스 등을 저렴한 가격에 제공할 수 있게 되었으며, 식별번호의 부여를 통해 VoIP 서비스는 기존 음성전화서비스와 동등한 수준의 경쟁력을 확보할 수 있는 것으로 평가되어, 기간통신서비스로서 기존 음성전화서비스와 유사한 수준의 규제를 받게 되었다. 최근에는 이러한 VoIP 서비스가 유선 환경에서뿐만 아니라 무선 LAN 환경에서도 구현되었고, 나아가 VoWLAN과 이동전화를 묶음으로 제공하는 기술이 가능하게 되었으며, 궁극적으로 VoIP가 이동전화서비스와 같이 완전한 이동 환경에서의 구현이 멀지않은 것으로 전망되고 있다. 이에 따라 무선 또는 이동 환경에서의 VoIP 서비스에 대한 이슈가 수면 위로 부상할 전망이며, 특히 이동 환경은 기존 이동전화사업자의 주파수 할당대가 납부 등의 측면에서 유선 환경과는 다소 차이가 있으므로 이동 환경에서의 VoIP를 어떤 식으로 규정해야 될지에 대해 많은 논란이 일 것으로 예상된다.

• Proceedings of KOSOMES biannual meeting
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• 2005.05a
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• pp.73-78
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• 2005

최근에 선박충돌사고나 좌초사고와 같은 중대한 해양사고를 조사할 때 사고관련자의 피로도(Fatigue)는 선박의 안전운항에 부정적인 영향을 미치는 인간과실(Human error) 유발요인으로써 항해사의 인지능력 및 업무수행능력을 저하시키는 중요한 요인으로 인식되고 있을 뿐 만 아니라, 이에 대한 많은 조사가 수행되고 있는 것이 각종 연구보고서를 통하여 나타나고 있다. 따라서 본 연구에서는 국내 해양사고관련자에 대한 피로도를 체계적으로 조사$\cdot$분석하기 위한 일환으로 미국연안경비대의 피로도 조사프로그램을 토대로 국내 해양안전심판원 웹싸이트에 조사프로그램을 구현하고 그 결과를 고찰하여 효율적인 피로도조사가 이루어질 수 있도록 몇 가지 방안을 검토하였다.