• 한국전산유체공학회지
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• 제20권2호
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• pp.52-60
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• 2015

The objective of this research lies in the effect of installation parameters influencing on the wind proof performance of the coastal forest for damage prevention. The dissipation ratio of incident wind power is developed as an assessment index to make a lumped parameter study possible. From the real field data of East, West, and South Sea bounded on the Korean peninsula, single and double storied forests were modeled in three-dimensional shape with computer aided design, and so was done the artificial structures such as wind break, sand accumulating fence, and sand dune, etc With a commercial code ANSYS-CFX, the computational result from the comparison of dissipation ratio between single and double storied forest shows the effect of composition, and also the installation effect is investigated for artificial structures with optimal dimension of distance.

• 한국주조공학회지
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• 제17권6호
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• pp.577-584
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• 1997

Evaluation of rolling contact fatigue damage as well as material development for roll of rolling mill is being studied until quite recently. In this paper, a focus has been imposed on evaluating the rolling contact fatigue damage. In order for this, the accumulating process of rolling contact damage using the ferritic, pearlitic and bainitic DCI has been analyzed by X-ray diffraction technique. The main finds are; 1) The graphite in DCI is considered to be a cause of interfering in the redistribution of stress. Eventually, it results in the branching of crack. 2) The evaluation of rolling contact fatigue damage can be estimated in terms of the change of residual stress and/or a half-value breadth on surface during rolling contact.

• 한국중재학회지:중재연구
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• 제32권3호
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• pp.93-109
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• 2022

Cosmetics are products that consumers use every day to maintain or improve the health of their skin and hair. Therefore, the expansion of the cosmetics market leads to the expansion of disputes over cosmetic damage. Along with constant social changes, new conflicts continue to arise. In order to resolve these disputes, various consumer dispute resolution organizations and methods are required. Therefore, Alternative Dispute Resolution (ADR), an alternative method that can provide a reasonable judgment on problems that occur during the manufacture and distribution of cosmetics with expert knowledge of the industry, is required. Korea resolves disputes between consumers and manufacturers caused by cosmetics through the ADR of the Korea Cosmetics Association and the Korea Consumer Agency. It handles disputes related to accidents caused by cosmetics, offers consultation on consumer complaints on cosmetics and provides information on accidents and safety related to cosmetics. It is not possible to completely eradicate disputes from cosmetic damages. Therefore, it is necessary to expand and efficiently operate the cosmetic ADR system for consumers. In this study, the current status of cosmetic damage disputes and damage relief and the role of the domestic ADR system were reviewed. Consumers should be easily relieved from damage caused by cosmetics. By accumulating important precedents with an efficient cosmetic damage dispute resolution system, disputes over cosmetic damage should be smoothly resolved.

• Steel and Composite Structures
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• 제21권3호
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• pp.517-536
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• 2016

Thick steel plate is commonly found with mega steel structures but its properties have not been fully explored. Grade Q345GJ-C steel plate with thickness ranging from 60 mm to 120 mm are studied in this paper. Both the static and cyclic performance of material in different directions (horizontal and through-thickness directions) and locations (outer surface, 1/4 thickness and mid-depth) are experimentally obtained. The accumulative damage during cyclic loading is also calculated by using bilinear mixed hardening (BMH) constitutive relationship together with the Lemaitre's damage model. Results show that the static properties are better at the outer surface of thick steel plates than those at mid-depth. Properties in through-thickness direction are similar to those at mid-depth in the horizontal direction. The cyclic performance at different locations of a given plate is similar within the range of strain amplitude studied. However, when damage parameters identified from monotonic tensile tests are included in the numerical simulation of cyclic loading tests, damage is found accumulating faster at mid-depth than close to outer surface.

• 한국독성학회:학술대회논문집
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• 한국독성학회 2001년도 International Symposium on Dietary and Medicinal Antimutgens and Anticarcinogens
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• pp.137-138
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• 2001

There has been accumulating evidence for the association of inflammatory tissue damage with the process of cancer development. Cyclooxygenase (COX), an important enzyme involved in mediating the inflammation, catalyzes the formation of prostaglandins (PGs) from arachidonic acid. There are two isoforms of COX, designated as COX-l and COX-2. COX-l is a housekeeping enzyme which is constitutively expressed and is thought to be involved in maintaining physiological functions.(omitted)

• 대한물리치료과학회지
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• 제1권2호
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• pp.301-311
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• 1994

Most patients treated by physical therapists have suffered some neurological trauma resulting from disease or injury. The traditional teaching used to be that damage of central neurons is irreversible. However, it has been necessary to cast aside this traditional view because of accumulating evidence that the brain is endowed with remarkable plasticity. This paper reviews the literature relating to neuroplasticity within the brain and draws implications pertinent to physical therapy practice.

• 한국해안·해양공학회논문집
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• 제22권5호
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• pp.295-305
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• 2010

국내 경사식 방파제는 거의 매년 태풍 피해를 지속적으로 입고 있지만 피복블록의 침식피해를 정량적으로 분석한 사례가 드물다. 본 논문에서는 피복블록의 침식을 상대피해로 표준화하여 나타내었다. 블록의 이탈 개수가 조사된 경우에는 이를 블록의 전체 개수로 나누어 상대피해를 계산하였으며, 피해 복구 비용이 조사된 경우에는 현재 가치로 환산한 복구 비용과 상대피해의 관계를 이용하여 상대피해를 산정하였다. 상대 피해는 태풍 매개변수인 중심기압 및 최대풍속과 지역별로 뚜렷한 상관관계를 보였다. 또한 기존 누적 피해 계산 방법 중에서 합리적 방법을 선정하기 위해 수리모형 실험결과와 두 가지 수치 모의 방법을 비교하였다. 본 연구에서 Melby and Kobayashi (1998) 방법이 합리적임을 증명하였고 이 방법으로 계산된 상대피해를 관측된 상대피해와 비교하였다. 여수항 동방파제에서 관측된 상대피해와 수치 모의 결과는 잘 일치하지만 나머지 방파제에서는 상당한 차이를 보였다. 이는 기후변화에 따른 태풍 강도의 증가로 방파제의 설계파고보다 큰 파고가 사용년수 동안에 발생하여 실제 상대피해가 증가된 것으로 추정된다.

• 환경영향평가
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• 제21권5호
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• pp.715-724
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• 2012

In this study, we simulated water temperature in the downstream according to withdrawal types of dam using EFDC model. Three scenarios were assumed as water was released from the surface layer, the middle layer, and the bottom layer at intervals of 10m depth. In case of the surface layer withdrawal, the water temperature rose from March and lowered gradually after it reached a peak in August. The middle and the bottom layers effluence temperatures were lower than the surface layer temperature by maximum $15.9^{\circ}C$(in July), but after September, temperature inversion appeared. It was advantageous for the surface layer withdrawal to decrease cold damage and fog in downstream area and was possible to the middle and the bottom layers withdrawal from August to September. However, the reliability of model should be improved by accumulating the real-time information of water temperature.

• 한국환경생태학회지
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• 제32권2호
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• pp.140-146
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• 2018

최근 국내 멧돼지 문제는 농작물 피해 및 도심 출몰로 인하여 사회적으로 심각한 상황에 직면해 있다. 본 연구는 경남 거창군의 멧돼지에 의한 농작물 피해사례를 바탕으로 피해에 영향을 끼치는 환경 요인들에 대하여 파악하고자 2012년 5월부터 10월까지 수행 되었다. 농작물 피해 분석 결과 주로 8월과 9월 사이 피해가 가장 많이 발생하였고, 벼의 빈도가 가장 높았으며 피해 강도는 고구마가 가장 높은 것으로 나타났다. 이는 멧돼지의 농작물 선호성과 특정시기에 대한 가용성과 관련이 있는 것으로 판단된다. 또한 농작물 피해에 경사, 지형기복, 산림과의 거리, 수계로부터의 거리, 도로로부터의 거리, 주거지로부터의 거리의 요인들이 영향을 미치는 것으로 나타났다. 피해 강도에 따른 환경요인의 차이는 나타지 않아 멧돼지는 한번 피해를 끼친 농경지를 지속적으로 방문하여 피해를 누적 시키는 것으로 파악된다. 따라서 멧돼지에 의한 농작물 피해를 저감시키기 위해서는 피해가 발생할 수 있는 곳에 멧돼지가 비선호하는 작물로 대체 재배하며 전기펜스 설치, 엽사와 포획틀을 이용한 멧돼지 개체수 조절이 필요할 것으로 판단된다.

• 전기학회논문지P
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• 제57권2호
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• pp.146-152
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• 2008

The frequency of lightning is increased due to improbable weather condition and global wanning. This phenomenon increases economical damage as well as human damage. Advanced countries like europe and north america have applied the facility standard of lightning by accumulating a store of quantitative data about lightning research. Lightning facility is composed of the lightning accepting part for induction lightning, ground connected electrode which conducts lightning current. The lightning accepting part is composed of normal rod, horizontal conductor, ESE lightning rod. Moreover, lightning accepting part is taken to use by the method of protection. This paper suggests HEC(Hybrid ESE-Conductor) method which mixes horizontal conductor and ESE lightning rod. This is also discovered by experiment that the starting point of corona discharge current is low, so it is efficient for lightning protection comparing with other methods. Moreover, distribution of electric field is analyzed qualitatively by finite element method. It also results in the relation of the starting point of corona discharge current. Corona discharge current makes minute current about some ${\mu}A$ between the electrodes by the strength of electric field. Also it occurs insulation destruction of gas, and it is developed to the shape of streamer by increase of the strength of electric field. We can find that the initial occurrence of streamer and contact probability of lightning can have advantage after researching the starting point of corona discharge current and discharge current of lightning striking point. This research demonstrates that the suggested HEC method is economically competitive as a lightning protection facility, and it takes a capably perfect role.