• 한국재난정보학회 논문집
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• 제9권4호
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• pp.462-468
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• 2013

제방 월류방지 대체공법으로 전도식, 부력식 홍수방지벽을 국내 외에서 개발하는 실정이다. 그러나, 사전점검 불가 및 유지관리 문제점이 있어 본 연구에서는 국내 외 최초로 경량 재질이면서 강도가 우수한 유리섬유복합소재를 이용한 승하강식 홍수방지 벽체구조물을 연구 개발하였다. 개발된 홍수방지 벽체구조물은 수치해석을 통해 구조적 안정성과 함께 현장 적용성을 제시하여 공사비를 약 87%~95%로 감소시키고 벽체구조물 내부에 고무 지수부재를 설치하여 차수성이 확보되는 것을 확인하였다.

• 대한안전경영과학회지
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• 제9권4호
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• pp.29-38
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• 2007

We adapted association rules of data mining in order to investigate the relation among the factors of musculoskeletal disorders and proposed the method of preventing the musculoskeletal disorders associated with multiple logistic regression in previous study. This multiple logistic regression was difficult to establish the method of preventing musculoskeletal disorders in case factors can't be managed by worker himself, i.e., age, gender, marital status. In order to solve this problem, we devised association rules of factors of musculoskeletal disorders and proposed the interactive method of preventing the musculoskeletal disorders, by applying association rules with the result of multiple logistic regression in previous study. The result of correlation analysis showed that prevention method of one part also prevents musculoskeletal disorders of other parts of body.

• 기술사
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• 제44권4호
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• pp.44-49
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• 2011

For the pleasant dwelling place, the most of apartments are designed with the increased green area ratio in ground space and the underground parking lot. However, the condensation in underground space has occasionally occurred due to the insufficient ventilation and insulation treatment. Despite reinforcement of the insulation treatment and mechanical ventilation for the preventing method of condensation. It seems difficult to expect preventing effects for the condensation without consideration of the thermal characteristic of structures. Furthermore, no fundamental measure has been established because maintenance work for these defects incurs a lot of costs and these defects could be occurred again. This study suggests a new method for preventing floor surface condensation through analyzing the reasons of condensation which occurred in the underground floor.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.4-5
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• 2021

In this study, in the coating-sheet composite waterproofing method, a specimen was formed to prevent the transmission of the no-node tensile stress occurring under the junction between sheets by forming an insulating structure when the junction was formed, and to compare the effect of preventing breakage with the existing common junction. For this, tensile performance evaluation was conducted. As a result of the evaluation, it was confirmed that it exhibited higher tensile strength compared to the existing joint and at the same time exhibited a large width of displacement characteristics, and thus, had an effect of preventing breakage.

• 한국음향학회:학술대회논문집
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• 한국음향학회 1994년도 FIFTH WESTERN PACIFIC REGIONAL ACOUSTICS CONFERENCE SEOUL KOREA
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• pp.728-733
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• 1994

Scientific foundation for ultrasonic scale preventing devices construction was given in 40S-50S of this century but their production in former USSR was organized later in 70th. Several different principles of scale preventing is overviewed together with physical principles of ultrasonic method. Practical experience received in USSR in 80S is discussed. Technical decisions and inventions used for construction of the first device UZU-1 produced in Cheboksary plant are enumerated and principles of UZU-2 device are briefly sketched.

• 한국화재소방학회논문지
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• 제20권2호
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• pp.80-86
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• 2006

본 고찰은 화재시 고강도 콘크리트의 주요 이슈 중의 하나인 폭열 현상에 초점을 맞추어 폭열의 정의, 분류 및 각각의 특징, 발생원인과 그 반응기구에 대하여 선행연구를 중심으로 분석하였다. 폭열은 급격한 온도 상승, 높은 수분 함유량, 낮은 물시멘트비(W/C), 콘크리트 내에 국부적인 높은 응력 발생 등과 같은 요인이 복합적으로 작용하여 발생한다. 이러한 요인을 토대로 폭열을 방지하기 위한 방법으로 크게 콘크리트의 온도 상승을 억제하는 방법, 콘크리트의 비산을 억제하는 방법, 그리고 빠르게 내부 수분을 건조시키는 방법 등을 들 수 있다. 본 고찰에서는 이러한 방법 가운데 가장 효율적인 폭열 방지 방안으로서 콘크리트 내부의 수분을 빠르게 건조시킴으로써 폭열에 이르게 하는 함수율 이하로 낮추어서 콘크리트 자체의 내폭열성을 높이는 방안을 고찰하였다. 실제 강제건조를 통해 함수율을 어떤 임계치(critical value) 이하로 낮추게 되면 폭열을 방지할 수 있으며 이를 위해서는 수동적인 자연건조 외에 강제건조 등으로 함수율을 낮출 필요가 있을 것이다. 이러한 임계치 결정을 위해 추가적인 많은 실험 및 자료가 도출되어야 할 것이다.

• 월간포장계
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• 통권280호
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• pp.86-89
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• 2016

• 약학회지
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• 제42권4호
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• pp.447-458
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• 1998

Inhibitory activity of pesticide-preventing active carbon fiber mask on the penetrations in pesticide spray and its inhibitory effect on acute inhalation toxicity in rats were s tudied. Pesticides were sprayed into box ($1.O{\times}1.2{\tmies}O.6\;m$) at a dose of 20ml/min of diazinon ($Diatone^{TM}$) suspension (340ppm) and 5g/min of BPMC powder (2.0%) for 4 hours, and then captured the penetrated pesticides into water via mask in box under 8l/sec suction. The pesticides were analysed by A.O.A.C. method and GC/MS. Pesticide-preventing active carbon fiber mask significantly inhibited the penetration of diazinon by 93.4% as compared with control, and cotton mask and pesticide-preventing mask did it by 74.2% and 83.7%,respectively. This result shows that pesticide-preventing active carbon fiber mask has the most prominent inhibitory effect in preventing the penetration of diazinone. In the penetration of BPMC, all of three masks, such as active carbon fiber mask, cotton mask and pesticide-preventing mask, have a similar inhibitory effect, which were 99.3%, 98.6% and 97.0%, respectively. The penetrated pesticides via pesticide-preventmg active carbon fiber mask did not exert acute inhalation toxicity.

• Child Health Nursing Research
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• 제25권1호
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• pp.74-84
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• 2019

Purpose: The purpose of this study was to develop content for safety education to prevent hospital safety accidents among hospitalized children and to investigate the status of safety education performed by nurses. Methods: First, the Delphi method was used, with 18 experts, to develop educational contents for preventing safety accidents. Second, an exploratory survey was performed of the actual status of safety education for preventing safety accidents among hospitalized children using a questionnaire developed based on the Delphi method. The participants of this study were 159 nurses with at least 6 months of work experience. Results: The educational content developed through the Delphi method for preventing safety accidents among hospitalized children contained seven domains (falls, injury, electric shocks/burns, suffocation/aspiration, poisoning/abuse, kidnapping, medical devices) with 44 topics. The item mean of nurses'perceptions of the importance of child safety education was 4.18, and the actual performance score was 3.72, which was a statistically significant difference (t=11.58, p<.001). Conclusion: These seven comprehensive domains of accident prevention education for hospitalized children are expected to be useful for interventions to support the safety of hospitalized children.

• 전기의세계
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• 제18권1호
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• pp.11-14
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• 1969

This paper shows experimentally one method of preventing porcelain insulators from salt accident likely to be caused in the region of sea coast. In this experiment some results that, if a conductor barrier is inserted into the flash over discharge path which is wetted by salt dissolved water, the flash over voltage found to be raised up, were gotten. This results may be actually applied to suspension insulator or bushing to prevent them from salt accidents.