• 한국수정란이식학회지
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• 제26권2호
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• pp.141-145
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• 2011

Seven male Himalayan tahrs were strongly assumed to have accidently fed on foreign bodies in 2007. At the time, zoo caretakers witnessed missing fence padding, such as carpet, plastic awning, and ropes. The incident occurred the morning after the items had been set up to protect indigenous, wild long-tailed gorals from self injury caused by head butting the steel fence. Adult male Himalayan tahrs were obviously suspected of mostly eating the paddings mainly composed of carpet, thin and long plastic awning, and ropes. Even though they had not shown digestive problems, surgery was determined necessary in order to remove any indigestible foreign bodies. Left flank rumenotomy was conducted on seven male Himalayan tahrs from April to May, 2011. After anesthesia with xylazine, rumenotomy was performed on a concrete floor, with legs and head secured by ropes. No access to water and hay prior to operation for two days was needed to make the surgical procedure done quickly. Two sheets of small hand towels protecting against inflow of ruminal contents were beneficial during surgery. Antibiotics were administered intramuscularly for seven days. No abscesses at the surgical site were found after surgery. Like domestic ruminants, wild ruminants also ingest metalic or non-metalic, indigestible foreign bodies by accident. Therefore, simplified rumenotomy must be developed to apply to those wild animals to lengthen their longevity and to advance the quality of life in captivity. This case report is the first showing how to perform rumenotomy of Himalayan tahr, a wild ruminant, in Korea.

• Ocean and Polar Research
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• 제26권1호
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• pp.23-32
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• 2004

As a baseline survey for long-term monitoring on environmental change around the Antarctic King Sejong Station, distribution pattern of Deschampsia antarctica Desv., a flowering plant newly colonized were investigated qualitatively and quantitatively in both austral summer 2002 and 2003. Dispersal of the seeds and vegetative leaves by skuas might lead to the colonization into this area from neighbors in Maxwell Bay. The pioneer populations were observed around ponds and a stream of the Sejong Point in January 2002, and the maximum dispersal area was four times expanded after a year. Most of the populations were formed on the stable and well-drained substrate, which consisted of moss carpet of Sanionia georgico-uncinata (65%) and pebbles (25%), while only a few young individuals were observed on the unstable and watertight silt-sandy area. Especially, S. georgico-uncinata was being effectively utilized as their primary substrate with the soft, coarse and water-contained leaves. Also the perennial mature plants of D. antarctica were mainly formed on the moss carpet rather than pebbles. A few individuals were grown on other mosses of Polytrichastrum alpinum, Bryum pseudotriquetrum, Pohlia cruda, and Conostomum magellanicum and on a liverwort of Cephaloziella varians. We expect that dispersal of D. antarctica and the following succession to grass field will be countinuously and dynamically proceeded in this area, with the characteristics of ecological niche against the initial moss populations, on the similar continuity of environmental conditions. The continuous observations are needed with establishment of database on environmental change of micro-habitats, e.g. the water content and nutrients of soil and the underground temperature and permafrost.

• 한국화재소방학회논문지
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• 제11권1호
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• pp.3-9
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• 1997

화재시 설내의 열적성충의 형성을 연구하기 위하여 쓰레기통, 의자, 카페트, 소파, 매트리스 및 장 농의 화재실험을 실제건물에서 수행하였다. 카페트와 같은 균퉁분산 가연물화재의 경우는 초기 점화기 간과 성장기의 기간이 화재 전기간에 비하여 매우 짧고, 최성기는 매우 길게 나타났다. 반면에 쓰레기 통, 매트리스 및 장농과 같은 집중 가연물화재의 경우는 초기점화기간과 성장기가 매우 길게 나타났다. 쓰레기통과 같은 위에서 아래인 한쪽 방향으로만 연소하는 경우는 봉우리가 하나로 나타났고, 의자, 소 파, 매트리스 및 장농과 같은 연소방향이 다양한 화재의 경우는 봉우리가 2개이상 나타났다. 어느 화재 의 경우나 경계면이 뚜렷이 나타났고, 상부충의 온도는 거의 일정하며 경계면 높이는 가구화재시 모두 1 l[m] 근처에서 일정한 상태값을 유지하였다. 다만, 최대온도를 나타내는 시간에는 경계면 높이가 바 닥에서 O.2S[m]내지 O.7S[m]까지도 내려왔다.

• 한국도로학회논문집
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• 제8권3호
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• pp.39-48
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• 2006

세립의 포리에틸렌, 카펫부산물, 시멘트와 라텍스로 코팅된 매끄럽고 둥근 규사질의 강자갈을 가지고 실험적인 조사가 이루어졌으며 아스팔트 혼합물 공시체를 만들었다. No. 4번체 이상에 남아 있는 골재만 코팅을 하였다. 개념은 매끄럽고 둥근 강자갈을 코팅함으로서 표면 거칠기를 증가시켜 공학적 특성이 우수한 혼합물을 만들어 내는 것이다. 표준 테스트와 비표준 테스트를 이용하여 아스팔트 혼합물 공시체를 평가하였다. 코팅과정과 제한된 혼합물 공시체 테스트 결과에 근거하여 다음과 같은 결과를 얻을 수 있었다. 세 가지 종류로 코팅된 골재를 사용한 혼합물들은 Hveem과 Marshall 안정도, 인장강도와 회복탄성계수가 증가되었으며 이는 코팅되지 않은 골재로 만든 혼합물과 비교하여 소성변형과 균열저항성이 향상된 것으로 판단할 수 있다.

• 항공우주기술
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• 제4권1호
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• pp.108-113
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• 2005

본 연구 에서는 고해상도 우주용 카메라의 경통부의 복합재 적층설계를 열환경 및 흡습에 의한 영향을 고려하여 수행하고 다층 지그재그이론에 기초하여 개발된 삼각형 유한요소를 이용 열흡 습 해석을 수행하여 융단도표를 통하여 도출된 최적 적층설계가 광학성능 허용범위를 만족하는지 검증 하였다.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2003년도 봄 학술발표회 논문집
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• pp.335-336
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• 2003

The synthesis of poly(trimethylene terephthalate) (PTT), whose application is being expanded very rapidly to new apparel and carpet materials, was investigated by melt condensation polymerization using 1,3-propanediol (PDO) and terephthalic acid (TPA). No catalyst was used in the 1st step reaction (esterification), but tetrabutyl titanate(TBT) was used as a polyesterification catalyst ranging from 25 to 75 ppm based on the weight of TPA used in the 2nd step reaction (polyesterification). The molar ratio of PDO to TPA was set as 2.2:1. The effect of reaction conditions on the color and intrinsic viscosity of the final product was investigated. (omitted)

• 한국조경학회지
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• 제28권1호
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• pp.54-61
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• 2000

Covering rate, visual rating and sod development were evaluated under three natural fiber materials with Phragmites spp. when over a plastic sheet. The results were as follows. (1) The last covering rate was high on jute net, coir mat and on Miscanthus sacchariflorus, respectively while the early covering rate was high on coir mat and on Miscanthus sinensis+perennial ryegrass. (2) The early growth was good on perennial ryegrass but the covering rate gradually turned poor because of summer drought. (3) Sod was highly developed on Phragmites japonica, Miscanthus sacchariflorus and Miscanthus sinensis compared with other species and mixtures. (4) The covering rate and visual rating were high on natural fiber materials such as coir mat and jute net when compared with on natural fiber materials such as none treatment plots. (5) The natural fibers materials on Phragmites spp. and Miscanthus spp. were effect on sod establishment. Sod coir mat was highly established. (6) The carpet-type sod was best developed on the coir mat.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2009년도 추계학술발표대회 논문집
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• pp.245-250
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• 2009

A variety of change in modern society has affected a family structure. In addition birth rate is getting lower and nuclear family type is getting common, influence of children has highly increased. According to this phenomenon, needs and concern about education and culture for children increase sharply. Children cultural complex can be learning field, which helps children not only to rediscover the world by themselves but also to have various and abundant experience. The purpose of this study is going to extract a planning factor of the children cultural complex through case studies of korean and oversea project for adaptable children cultural complex. In addition, this study tries to analyze the features of the children cultural complex in korean and oversea. Consequently, The analysis result is to be introduced party room to children cultural complex, used the PVC tile and carpet tile for safety of children and variety, and executed program relevant to nature.

• 한국대기환경학회지
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• 제25권3호
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• pp.237-247
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• 2009

The combustion characteristics of car components have been investigated, The combustion parameters like heat release rate, smoke production, yield of carbon dioxide and carbon monoxide and mass loss rate were analyzed by cone-calorimeter for representative samples (seat, carpet, headrest, rubber mat, dash board and electric wire) collected from a used car. The results from sample combustion showed that cover and sponge in seat more quickly ignited and flamed than other parts. The heat released from the combustion of dash board sample was 144.29$kw/m^2$ and the smoke produced by the wire combustion was 6896.4 $m^2/m^2$. The yields of carbon dioxide and carbon monoxide were in the ranges of 1.09${\sim}$2.76 kg/kg and 0.0262${\sim}$0.1008 kg/kg, respectively.

• 한국전산유체공학회지
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• 제17권2호
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• pp.58-64
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• 2012

Turbulent flows in a intake part of vacuum cleaner are studied by RANS simulations. The governing equations are solved by the SIMPLE algorithm based on the finite volume method of the unstructured grid system. The predicted results show that the suction performance is closely related to the variation of flow structure in the intake part. In order to investigate for the cleaning of bedclothes and carpet without sticking, several design changes are applied. The introduction of a solid cylinder in the intake part changes vortical structures significantly. Based on this result, a new design with spiral brushes is proposed. The design shows a good behavior for the suction performance and the flow control.