• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2007년도 동계학술발표대회 논문집
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• pp.600-605
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• 2007

In this study, the risk rates of different contamination sources of the Foreign material in a minienvironment were analyzed through CFD simulation. From the results, the ambient contamination sources mainly affect wafers in the FOUP, whereas the internal contamination sources mainly affect wafers laid on the robot arm in the minienvironment. And the purging plenum system is very useful in protecting the wafers in the FOUP from Foreign materials transferred from the FFU. However, this system is unable to protect the wafers on the robot arm from internal Foreign materials and the wafers in the FOUP from sources of the interface between the FOUP and the minienvironment.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 추계학술대회 논문집 Vol.16
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• pp.558-562
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• 2003

In this paper, neural networks is studied to apply as a PD source classification in XLPE power cable specimen. For treeing discharge sources in the specimen, three defected models are made. And these data making use of a computer-aided discharge analyser, statistical and other discharge parameters is calculated to discrimination between different models of discharge sources. And also these parameter is applied to classify PD sources by neural networks. Neural Networks has good recognition rate for three PD sources.

• Laboraroty Animal Research
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• 제34권4호
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• pp.270-278
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• 2018

This study was conducted to compare the anesthetic effects of 2,2,2-tribromoethanol (TBE, $Avertin^{(R)}$) in ICR mice obtained from three different sources. TBE (2.5%) was intraperitoneally injected at three doses: high-dose group (500 mg/kg), intermediate-dose group (250 mg/kg), and low-dose group (125 mg/kg). Anesthesia time, recovery time, end-tidal peak $CO_2$ ($ETCO_2$), mean arterial blood pressure, heart rate, oxygen saturation ($SpO_2$), body temperature, pH, $PCO_2$, and $PO_2$ of the arterial blood were measured. Stable anesthesia was induced by all doses of TBE and the anesthesia time was maintained exhibited dose dependency. No significant differences in anesthetic duration were found among the three different strains. However, the anesthesia time was longer in female than in male mice, and the duration of anesthesia was significantly longer in female than in male mice in the high-dose group. The recovery time was significantly longer for female than male mice in the intermediate- and high-dose groups. In the ICR strains tested, there were no significant differences in the mean arterial blood pressure, $SPO_2$, arterial blood $PCO_2$, and $PO_2$, which decreased after TBE anesthesia, or in heart rate and $ETCO_2$, which increased after TBE anesthesia. In addition, body temperature, blood biochemical markers, and histopathological changes of the liver, kidney, and lung were not significantly changed by TBE anesthesia. These results suggested that ICR mice from different sources exhibited similar overall responses to a single exposure to TBE anesthesia. In conclusion, TBE is a useful drug that can induce similar anesthetic effects in three different strains of ICR mice.

• Asian-Australasian Journal of Animal Sciences
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• 제14권7호
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• pp.979-985
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• 2001

Two experiments on commercial broiler chickens (3-37 d) and WL layers (252-364 d) were conducted to study the relative bioavailability of phosphorus (P) from different P supplements in comparison to tricalcium phosphate (TCP), at constant dietary calcium (Ca):P ratio. The P sources tested were dicalcium phosphate (DCP), steam sterilized bone meal (SSBM), commercial mineral mixture (CMM), phosphoric acid (PA) and a combination of CMM + PA. Fluorine (F) content in CMM and SSBM was 13.12 and 0.14 g/kg, respectively. In commercial broiler diets, DCP, SSBM or PA could be used as supplemental P sources without affecting (p<0.05) weight gain, feed intake, tibia ash and, P and Ca contents in tibia ash when compared to TCP. Severity of leg abnormality and deposition of F in bone were higher (p<0.05) in group fed CMM. P retention and serum inorganic P content was significantly reduced (p<0.05) in CMM fed birds compared to those fed TCP, SSBM, PA or CMM+PA. Among other P sources (TCP, SSBM, PA and CMM+PA) the serum inorganic P levels did not vary significantly (p<0.05). The P retention also significantly reduced in CMM fed groups compared to those fed DCP or PA. The P retention significantly increased from 0.183 to 0.216 units by supplementation of PA to CMM diet. In layers, egg production was not affected by replacing TCP with DCP, SSBM, PA or CMM+PA, but significantly (p<0.05) reduced with CMM. Feed (kg)/kg egg mass, egg weight, shell quality (shell weight and shell thickness) and serum Ca levels were not influenced by dietary variation in P source. The poor performance of both broilers and layers fed on CMM based diets could be attributed to the presence of hlgher levels of F (647.8 and 630.1 mg/kg, respectively) and low P utilization. Based on growth, bone mineralization and P retention it is concluded that DCP, SSBM or PA can be used as alternatives to TCP in broiler diets. In WL layer diets, in addition to above P sources, CMM can also be used as supplemental P source by replacing one half of P from CMM with PA without affecting egg production and shell quality.

• Journal of Nutrition and Health
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• 제29권9호
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• pp.925-933
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• 1996

This study intended to compare the hypolipidemic effects among six experimental groups fed by three different dietary carbohydrates on hyperlipodemic rats. Sixty experimental animals were divided into 6 groups, SB, ST, SP and CB, CT, CP after production of hyperlipidemia fed by SB diet on Sprague-Dawley rats for 4 weeks. Rats were fed by six experimental diets for eight weeks. Hyjperlipidemic rats showed three times higher in plasma TG level not in cholesterol content compare to control group fed by stock diet. Two different dietary carbohydrates seem to be effective in body weight gain and fat cumulation as weight of epididymal fat pad. In comparison of S and C groups, C fed groups showed lowering effect in plasma TG and total lipid contents, but among S fed groups, ST and SP group showed lower than SB in this respects. Dietary carbohydrates seem to be more effective than fat in plasma lipid contents. When we compare among three different fat groups, only T groups with different carbohydrates increased in peroxisomal lipid oxidation and decreased in lipogenic enzyme activites. As same token, sucrose fed group with three fat sources seem to increase activiteies enzyme activities. In epididymal fat pad and Heart, SP and CP effect more in LPL activites than other groups. In conclusion, we can recommed to consume polysaccharides rather than disaccharide and n-3 fatty acids such as perilla and tuna oils to alleviate hypertringlycemic condition.

• 복식문화연구
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• 제10권1호
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• pp.89-101
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• 2002

The purpose of this study was to investigate the effect of demographics and general clothing buying behavior of college male students in China. A questionnaire was developed to measure clothing purchasing motives, fashion information sources, evaluation criteria of apparel product, stores selection criteria, and general clothing buying behavior. The questionnaire was administered to 300 college male students in Dandong of China. The data was analyzed using percentage, frequency, mean, factor analysis, and ANOVA, duncan test. The results of the study were as fellows: 1. The clothing purchasing motives of consumers were significantly different depending on demographics. 2. The fashion information sources of consumers were significantly different depending on subjects, pocket money, and level of life. 3. The evaluation criteria of apparel product of consumers were significantly different depending on parent's jobs. 4. The stores selection criteria of consumers were significantly different depending on parent's school career, mother's jobs, household income. 5. Apparel buying places of consumers were in order of ; department stores, speciality stores, natural market. The buying frequency of apparel showed the most three times a year. The consumers were influenced by friends for apparel purchasing, and the method of payment mainly cash. 6. About purchase experience of the imported clothing, the 67% consumers answered 'yes', and the country of origin of the imported clothing were in order of ; Japan, Italy, France, Korea. The imported clothing satisfaction level of consumers were significantly different depending on demographics.

• 대한토목학회논문집
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• 제33권6호
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• pp.2293-2302
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• 2013

홍수위험관리에서 홍수범람도는 가장 기본적인 자료로 사용되고 있다. 그러나 홍수범람도 구축과정에서 다양한 형태로 불확실성이 발생하기 때문에 이는 정확한 홍수 방재계획 수립에 걸림돌로 작용할 수 있다. 그러므로 불확실성 요소를 제거하거나 개선하여 홍수범람도의 정확성을 향상시키는 것이 필요하나, 모든 불확실성을 완벽하게 제거하는 것은 경제적 타당성과 홍수에 대한 지식의 한계 때문에 불가능하며 매우 비효율적일 수 있다. 또한, 홍수범람도에 전달되는 불확실성 요소의 영향은 다른 환경변수에 따라 다를 수 있기 때문에 다양한 주변 환경의 조건을 고려한 불확실성 요소에 대한 민감도 분석이 필요하다. 이를 통하여 제거해야하거나 개선시켜야할 불확실성 요소의 우선순위를 정함으로써 전략적이면서도 효율적인 홍수위험관리를 유도할 수 있을 것으로 판단된다. 본 연구는 주변 환경의 조건에 따라 홍수범람도에 미치는 불확실성 요소의 민감도를 FOA방법을 이용하여 분석하고, 이를 미국 Indiana주 Columbus시 근처의 Flatrock 강에 적용하여 홍수범람도에 가장 큰 불확실성을 전달하는 요소를 선별하였다. 본 연구결과는 하나의 불확실성 요소가 다른 입력변수나 매개변수와 같은 주변 환경에 의해 홍수범람도에 다르게 영향을 준다는 것을 확인하였으며 또한, 대상유역의 홍수범람도 구축과정에서 가장 큰 불확실성 요소는 지형자료로 판명되었다.

• Asian-Australasian Journal of Animal Sciences
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• 제17권8호
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• pp.1131-1138
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• 2004

The objective of this study was to investigate the effects of different sources of Ca and P on urine and ileal digesta pH, and ammonia ($NH_{3}$), methane ($CH_{4}$), and odor emission. In experiment 1, eight pigs (commercial three-way cross; initial BW 67$\pm$3 kg) were arranged in a repeated 4$\times$4 Latin Square design. All pigs were equipped with a T-cannula in the distal ileum. Four corn-soybean meal based diets were formulated. Diet 1 was the control in which dicalcium phosphate (DCP) and limestone ($CaCO_{3}$) were used as the sources of inorganic P and Ca. In Diets 2 and 3, ${H_{3}}{PO_{4}}$, monocalcium phosphate (MCP), and $CaSO_{4}$replaced DCP and $CaCO_{3}$ as the inorganic sources of P and Ca. Diet 4 was similar to Diet 1 except that it was fortified with HCl to provide an acid load similar to that of diet 2. Urine and ileal digesta pH were determined in pigs fed each of these diets. In Exp. 1, urine pH decreased (p<0.05) in animals consuming diets containing ${H_{3}}{PO_{4}}$-$CaSO_{4}$ (5.85$\pm$0.38) and MCP-$CaSO_{4}$(5.73$\pm$0.30) compared with the DCP-$CaCO_{3}$ diet (6.89$\pm$0.24). In the pigs consuming ${H_{3}}{PO_{4}}$-$CaSO_{4}$, ileal digesta pH decreased compared with the control (5.52$\pm$0.28 vs. 6.66$\pm$0.17; p<0.05). Based on the results of Exp. 1, a total of four trials were performed in environmental chambers for determining how $NH_{3}$, $NH_{4}$, and odor were affected by the different dietary Ca and P sources (Exp. 2). In Exp. 2, pigs fed the ${H_{3}}{PO_{4}}$-$CaSO_{4}$ diet had decreased (30%) $NH_{3}$ emissions compared with the control (p<0.05). Also, a combination of MCP-$CaCO_{3}$-$CaCl_{12}$ decreased $NH_{3}$ emission by 15% (p<0.05). Emission of $CH_{4}$ was decreased only with the ${H_{3}}{PO_{4}}$-$CaSO_{4}$ diet with 14% (p<0.05). Odorant emission of phenolics and volatile fatty acids increased roughly three-fold with the DCP-$CaSO_{4}$ diet but was not affected by other test diets. In conclusion, acidogenic Ca and P sources in swine diets can decrease the urinary pH and reduce $NH_{3}$ and $CH_{4}$ emission from swine facilities.

• Fisheries and Aquatic Sciences
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• 제5권2호
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• pp.103-107
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• 2002

A 6-week feeding trial was conducted to investigate the effects of six different dietary animal protein sources on growth and body composition of olive flounder, Paralichthys olivaceus in recirculating system. White fish meal (WFM), flounder muscle (FLM), carp muscle (CM), blood meal (BM), squid liver powder (SLP) and casein (CA) were used as the main animal protein sources in the six experimental diets. Fish averaging $2.9\pm0.03g$ $(mean\pm SD)$ were distributed to each aquarium as a group of 15 fish and were fed one of the six experimental diets to each treatment of triplicate groups. After 6-week of the feeding trial, fish fed white fish meal (WFM) and flounder muscle (FLM) diets showed a significant higher weight gain $(WG\%)$ (P<0.05) than those of fish fed the CM, BM, SLP and CA diets. Fish fed BM diet showed the lowest WG among all the dietary treatments. Feed conversion ratio (FCR) and protein efficiency ratio (PER) showed the similar trend as WG. Hematocrit and hemoglobin were not affected by the dietary treatments. Fish fed the FLM and CM diets showed significant higher survival rate than those of fish fed BM diets, and there was no significant difference in survival of fish fed WFM, FLM, CM, SLP and CA diets. These results indicated that WFM and FLM are the best dietary protein sources tested in olive flounder.

• Journal of international Conference on Electrical Machines and Systems
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• 제1권4호
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• pp.457-463
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• 2012

Cascaded H-bridge multilevel inverters shows a useful circuit configuration to increase the number of output voltage levels to obtain high quality output voltage. By applying the concept of the power of three to dc voltage sources, it can increase the number of output voltage levels effectively. To realize this concept, two approaches may be considered. One is to use independent dc voltage sources pre-scaled in the power of three, and the other is to use instantaneous dc voltage sources generated from a cascaded transformer, which has the secondary turn-ratios scaled in the power of three in sequence. A common feature in both approaches is to use the concept of the power of three for dc voltage sources, and a point of difference is whether it adopts a low frequency transformer or not, and where the transformer is located. According to the difference, application areas are limited and show different characteristics on THD of output voltages. We compare and analyze both approaches for their circuit configurations, voltage level generating method, THD characteristics of output voltage, efficiency, application areas, limitations, and other characteristics by experiments using 500 [W] prototypes when they generate a 27-level output voltage.