• 한국임상약학회지
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• 제21권3호
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• pp.256-269
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• 2011

Omega-3 fatty acids are a specific type of unsaturated fat that the body cannot manufacture on its own, so they must be obtained from food which is essential fatty acids (EFAs). Omega-3 fatty acids consist of three types which are a-Linolenic Acid (ALA), Eicosapentaenoic (ELA), and Docosahexaenoic Acid (DHA). Especially, EFAs help to prevent skin and hair drying, acne, eczema, prevention from allergies, brittle nails, rashes, and tiny lumps. The aim of this study is to investigate improvement and protection for hair damaged by chemical treatment with omega-3 formulated shampoo. We selected virgin hair sample and divided into two groups for bleaching once and three times and then damaged hair by changing the number of hair bleaching (twice with interval of 15 minutes). Each bleached hair was treated by five different kinds of shampoo (Control, Horse shampoo, DHA shampoo, EPA shampoo, Omega-3 shampoo mixture). Apart from this, EPA/DHA 2, 5, 8, 10 and 12% shampoo were prepared and treated to hair for comparing rate of progress in damaged hair. To quantify improved condition of damaged hair, we performed Scanning Electron Microscope (SEM) for ultrastructure of damaged hair fraction, measurement of thickness change and BCA Protein Assay for recovery rate of damaged hair. The moisture in hair was measured by Thermal analysis machine. In results, we observed the particle of hair surface damaged by bleaching treatment were well improved with treatment with EPA and DHA shampoo. Also, quantity of protein was lowered with higher concentration of EPA & DHA i.e., 8 and 12 % then compared with horse oil shampoo in three times treatment group. It shows that bleached hair have been recovered by treating rapidly and get protective coat. In conclusion, EPA and DHA shampoo improved damaged hair, especially with EPA / DHA 12% shampoo. Also, EPA shampoo could protect the damaged hair depending on increasing concentration of EPA. Therefore, we conclude omega-3 shampoo could make damaged hair protect and get healthy hair environment.

• 대한조선학회논문집
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• 제49권1호
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• pp.52-59
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• 2012

Among many factors to be considered for higher safety level requirements, the hull stability in intact and damaged conditions in seaways is of utmost importance. Since the assessment of a damaged ship is complicated due to the highly non-linear behavior, it is widely acknowledged that computational fluid dynamics (CFD) methods are one of the most feasible approaches. Although many research activities are being reported on the damaged ship stability recently, most of them are not designed for validation of CFD studies. In this study, well-designed model tests were performed to build a CFD validation database, which is essential in developing better CFD methods for the damage stability assessment. The geometry of the damaged compartment and test conditions were determined based on preliminary CFD simulations. Free roll decay tests in calm water with both intact and damaged ships were performed and the roll motion characteristics were compared. The damaged ship showed a larger roll damping coefficient and more rapid decrease of roll amplitude than the intact ship. The primary reason of these efforts can be explained by the movement of the flooded water.

• 터널과지하공간
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• 제24권3호
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• pp.187-200
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• 2014

굴착 또는 발파 후 암반손상대 내 암반 물성은 응력재분배나 발파충격에 의해 영구히 약화된다. 본 논문에서는 이러한 암반손상대를 사면에 적용하였다. 손상대 유 무에 따라 2차원 모델링을 통해 암반사면의 역학적 정성을 비교하고 안전율에 영향을 미치는 인자를 분석하는 것이 본 연구의 목적이다. 모델링 결과 사면의 역학적 안정성은 손상대 유 무에 따라 현저하게 차이가 있었다. 특히 손상대를 고려한 안전율은 고려하지 않을 때 보다 약 49.4%가 감소하였다. 부분요인설계법을 이용하여 안전율에 관한 인자 분석을 실시한 결과 안전율에 영향을 미치는 주요 인자는 사면 경사, 점착력, 내부마찰각, 높이였다.

• 대한의생명과학회지
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• 제12권4호
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• pp.361-370
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• 2006

To evaluate an effect of pathological liver damage on the conjugation of cyclohexane metabolites, rats were pretreated with 50% $CCl_4$ dissolved in olive oil (0.1 ml/100 g body weight) 10 or 17 times intraperitoneally at intervals of every other day. On the basis of liver function, the animals pretreated with $CCl_4$ 10 times were identified as acutely liver damaged ones and the animals pretreated with $CCl_4$ 17 times were identified as severly liver damaged ones. To these liver damaged animals, cyclohexane (a single dose of 1.56 g/kg body weight, i.p.) was administered at 48 hr after the last injection of $CCl_4$. The rats were sacrificed at 4 or 8 hr after injection of cyclohexane. The cyclohexane metabolites, cyclohexanol (CH-ol), cyclohexane-1,2-diol (CH-1,2-diol), cyclohexane-1,4-diol (CH-1,4-diol), and their glucuronyl conjugates and cyclohexanone were detected in the urine of cyclohexane treated rats. The urinary concentration of cyclohexane metabolites was generally more increased in liver damaged animals than normal ones, and the increasing rate was higher in $CCl_4$ 17 times injected rats than 10 times injected ones. And liver damaged.ats, especially $CCl_4$ 17 times treated ones, had an enhanced ability of glucuronyl conjugation to CH-ol analogues compared with normal group. Futhermore, CH-1,2 and 1,4-diol were all conjugated with glucuronic acid in $CCl_4$ 17 times injected animals. On the other hand, the increasing rate of activities of hepatic cytochrome P450 dependent aniline hydroxylase, alcohol dehydrogenase and urine diphosphate glucuronyl transferase was higher in 17 times $CCl_4$-treated rats compared with normal and $CCl_4$ 10 times injected animals. Taken all together, it is assumed that an increased urinary excretion amount of cyclohexane metabolites in liver damaged rats might be caused by an increase in the activities of cyclohexane metabolizing enzymes. And enhanced conjugating ability of CH-ol in liver damaged animals and novel finding of conjugating form of CH-1,2 and 1,4-diol might be caused by increase in the activity of hepatic diphosphouridine glucuronyltransferase.

• 대한공간정보학회지
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• 제18권4호
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• pp.41-50
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• 2010

우리나라는 국토에서 산림이 차지하는 비율이 매우 높기 때문에 산불은 방재에 있어서 중요한 요소로 취급된다. 산불 피해 면적 산정은 향후 복원계획을 수립함에 있어서 예산 수립이나 물량 산출에 기초가 되는 중요한 자료이므로 정확하게 산정되어야 한다. 우리나라에서는 산불이 발생되면 GPS를 이용하여 피해 면적을 조사하고 있다. 그러나 실제 산불 피해 면적을 산정하는 데 있어서는 여러 가지 문제로 인하여 신속하고 정확한 산정이 잘 이루어지지 않고 있다. 우리나라의 산불 담당 기관인 산림청은 전국을 대상으로 하여 충분한 수의 산림 헬리콥터를 운용하고 있다. 따라서 산불 피해가 발생한 후에 산림 헬리콥터를 이용하여 피해지역을 디지털 카메라로 사진 촬영하는 것이 가능할 것이다. 본 연구에서는, 공중에서 디지털 카메라로 스냅 촬영한 산불 피해 지역 사진을 이용하여 그 피해 조사를 수행할 수 있도록, 여러 가지 처리 방법을 비교 고찰함으로써 적합한 방안을 정립하였다. 본 연구의 결과는 향후에 디지털 사진을 이용한 산불 피해 조사 시스템 개발에 유용하게 활용될 수 있을 것이다.

• 한국환경복원기술학회지
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• 제23권1호
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• pp.1-14
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• 2020

In this study, we 1) identified the damaged areas along the south limit line (SLL) of the demilitarized zone (DMZ) by the military's 'DMZ barren land campaign', and 2) categorized the identified damaged areas into a few ecological types. Using high-resolution satellite images, we delineated the total damaged areas to be 1,183.2 ha, which accounted for 50.1% of the 100-m northern buffer regions from the SLL. Of the total damaged areas, 16% were severely damaged, i.e., they had been damaged until recently and so remained barren without vegetation cover. In other areas, the levels of damage were either moderate (59.9%) or slight (24.1%), due to natural succession that turned those areas to grassland or forest. Using satellite image-derived land cover maps and climatic and topographic data, we categorized the damaged areas into seven types: lowland grassland (19.8%), western lowland forest (21.4%), low-altitude forest (25.5%), mid-altitude forest (18.4%), high-altitude forest (6.8%), vicinity in east coast (7.9%), and waterbody (0.2%). These types can be used to identify proper measures to restore ecosystems in the DMZ for now and after Korean reunification.

• 한국해양학회지:바다
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• 제10권3호
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• pp.171-180
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• 2005

2004년 수마트라 지진에 의해 야기된 지진해일의 충격과 관련하여 태국 피해연안에서 "Tsunami impact on the coastal zone of Thailand"라는 제목의 야외답사가 3일간 수행되었다. 태국 안다만해 연안의 지진해일 피해지역은 피해정도에 따라 심한 피해 연안역, 중간 피해 연안역, 약한 피해 연안역으로 구분된다. 하구의 수로들은 넓어지고 해빈 모래는 침식되어 인근해역이나 배후지역에 재퇴적되었다. 답사는 심한 피해 연안역인 팡아(Phang Nga)주와 약한 피해 연안역인 푸켓 섬 등 대표지역의 총 12개 지점에서 수행되었다. 본고에서는 지진해일 이전과 이후의 위성자료와 현장답사 사진을 중심으로 지질해일이 태국의 연안역에 미친 지질학적 영향을 소개한다.

• 한국BIM학회 논문집
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• 제9권1호
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• pp.11-21
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• 2019

Recently, there is an increase in fire incidents in building structures. Due to this, the importance of fire-damaged buildings' safety diagnosis and evaluation after fire is growing. However, the existing fire-damaged safety diagnosis and evaluation methods are personnel-oriented, so the diagnostic results are intervened by investigators' subjectivity and unquantified. Thus, improper repair and reinforcement can result in secondary damage accidents and economic losses. In order to overcome these limitations, this study proposes using 3D laser scanning technology. The case analysis of fire-damaged building structures was conducted to verify the effectiveness of accuracy and manpowering by comparing the existing method and the proposed method. The proposed method using 3D laser scanning technology to obtain point cloud data of fire-damaged field. The point cloud data and BIM model is combined to inspect the fire-damaged area and depth. From inspection, quantified repair and reinforcement quantity take-off can be acquired. Also, the proposed method saves half of the manpowering within same time period compared to the existing method. Therefore, it seems that using 3D laser scanning technology in fire-damaged safety diagnosis and evaluation will improve in accuracy and saving time and manpowering.

• 한국응용과학기술학회지
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• 제39권5호
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• pp.614-622
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• 2022

본 연구는 라벤더추출물을 첨가한 제형제를 제조하여 손상된 모발에 도포할 때 미치는 영향에 대하여 알아보고자 하였다. 실험재료는 라벤더추출물 함량을 0 g, 3 g, 6 g, 9 g 으로 펌베이스제에 첨가하여 제조하였다. 제조한 제형제로 4개의 손상 모발 시료에 도포하여 비교 분석하였다. 손상 모발에 미치는 영향에 대한 측정방법은 인장강도, 메틸렌블루를 이용한 흡광도, 광택을 측정하였다. 연구결과의 신뢰성을 위해 통계분석을 하였다. 인장강도 측정결과는 8레벨에 6 g 과 9 g 을 함유한 제형제로 도포 한 시료의 인장강도가 증가하여 손상모발에 영향을 미치는 것을 알 수 있었다. 메틸렌블루를 이용한 흡광도 분석 결과 추출물을 첨가하여 도포 한 모든 시료의 흡광도가 감소하여 손상모발에 영향을 미치는 것을 알 수 있었다. 광택 측정 결과는 9 g 첨가시에 손상모발에 영향을 미치는 것을 알 수 있었다. 결론은 라벤더추출물이 손상된 모발에 영향을 미치는 것을 알 수 있어 모질 개선효과가 있을 것으로 생각된다.

• Journal of the Korean Wood Science and Technology
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• 제31권4호
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• pp.57-62
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• 2003

본 연구에서는 산불 피해 소나무재의 이용을 위한 기초자료를 얻고자 역학적 및 건조 특성을 조사하였다. 산불피해재는 종압축 특성, 전단강도, 충격휨흡수에너지 등에서 건전재와 거의 유사한 결과를 보여주었으며, 산불피해재 변재부의 휨특성은 건전재보다 양호하게 나타났다. 건전재와 산불피해재 변재부의 생재함수율은 산불피해재가 다소 낮았으나, 건조속도는 거의 차이가 없었다. 건조시 발생되는 초기할렬은 건전재가 산불피해재보다 발생율이 높았고, 내부할렬은 건전재와 산불피해재에서 발생되지 않았다. 따라서 산불에 의해 피해를 입은 목재의 대부분은 수피부를 제거하여 이용할 경우 건전재와 거의 동일한 용도로서 사용이 가능할 것으로 생각된다.