• Journal of the Korean Society of Clothing and Textiles
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• v.32 no.1
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• pp.123-133
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• 2008

The purpose of this study is to analyze dissatisfaction and size appropriateness of the women with big breast for design the high functional big size brassiere. The data were collected from 179 women(between the ages of 20 and 39) residing in Gwang-ju using a questionnaire to purchase, wearing comfort, dissatisfaction of the size, wire and the pad of the big size brassiere. The data were analyzed with Chi-square test, t-test and ANOVA using statistical program SPSS 12.0. The results of this research are as follows; 1) Seven-two-point-two percent of the women with big breast more than C cup size polled said they had difficulty in looking for the suitable size of the brassiere and they usually weared the smaller size than the their own size. As a result, they felt inconvenience for the discord with the nipples and lack of the shape revision. 2) According to the result of the correlation analysis, breast size and Rohrer's index showed low correlation. 3) After dividing all respondents for this research into categories of the group of more than C cup and less than B cup the differences in responses were compared. The dissatisfaction with brassier were 'discord of cup size', 'pain due to the wire' and 'unnatural breast shape' in the group of more than C cup, compared to 'discord of cup size' and 'deformation of the wire and pad' in the group of less than B cup.

• Journal of Biosystems Engineering
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• v.32 no.1 s.120
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• pp.13-19
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• 2007

Storage rough rice in low temperature using the winter cold air avoids rough rice temperature increase which happens from early May, and this is possible by installing a cooling system in the top of a bin, the room between top rice level and bin ceiling. The research objective is to establish low temperature rough rice storage technique, furnishing winter cold air to rough rice, by investigating the cooling system potential of maintaining low rough rice temperature and by analyzing rough rice storage characteristics over a storage period. The rough rice storage characteristics were evaluated from January to August 2003, using a storage and dry bin of 400-ton capacity. Results of this research are as follows: Cooling bin using the cooling system in the top of the bin maintained the rice temperature less than 15$^{\circ}C$ in entire portions in August. Moisture contents and germination rates of rough rice were decreased over the storage period, on the other hand, the rough rice stored in the ambient temperature bin had relatively lower moisture contents and germination rates to compare with the bin using winter cold air. Crack ratio and acid value of brown rice in the ambient temperature bin storage had increased more than the cooling bin storage. The result indicates that the storage bin using winter cold air and the cooling system maintains moisture content and germination of rice, minimizes cracked kernel and acid value, and preserves rice quality as well.

• Journal of the Korean Society for Precision Engineering
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• v.27 no.5
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• pp.75-84
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• 2010

The aim of this paper is to design the blank shape of SPFH 590 high strength steel for stamping of the center hinge of automotive via numerical analyses and experiments for multi-stages transfer forming process. Three-dimensional elasto-plastic finite element analyses for the transfer forming process with six stages were performed using a commercial code AUTOFORM V4.2. The influence of the blank shape on the formability and the shape conformity were quantitatively examined through the FE analyses. From the results of the FE analysis, a feasible shape of the blank and the forming load were estimated. Stamping experiments were carried out using the proposed blank shape. The results of experiments were shown that the center hinge parts with the desired shapes can be manufactured successfully as the proposed blank shape is used. Through the comparison of the results of the experiments with those of the analyses, it was shown that the estimation of blank shape using the FE analysis is a proper methodology to create a feasible shape of the blank for the center hinge of automotive.

• Tunnel and Underground Space
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• v.19 no.5
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• pp.463-472
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• 2009

Many old domestic mines were excavated with the room and pillar method or the sublevel caving method and they involve the great possibility of surface subsidence, especially in the shallow depth mines. In most of these cases, the mine roadways and openings are very irregular in shape and the information about the local geology is uncertain. Consequently it is not simple to standardize the estimation method for the possibility of subsidence, especially the sinkhole subsidence. In this study, the fuzzy reasoning method has been applied for development of estimating the possibility of subsidence occurrence in abandoned mine area. This method has the advantage in producing the reliable estimation results with a simple performance procedure even when the precise information on the local geology and mining conditions is rare. For the verification of applicability of this method, the developed method has been applied to Kumho mine in Bonghwa, Kyungbook province and the Choong-ju mine in Iryu, Choongbook province where the surface subsidence occurred already.

• Korean Journal of Remote Sensing
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• v.27 no.4
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• pp.495-506
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• 2011

COMS In-Orbit Tests(IOT), performed from July, 2010 to Jan, 2011, were successfully completed and the scientific data from MI and GOCI has been distributed officially from April, 2011. This paper focuses on the geometric calibration system tests conducted during the IOT. The geometric calibration process, which is one of the primary objectives of the IOT is the final step of COMS data pre-processing. The basic principles of the geometric calibration (or image navigation and registration, INR) algorithm for COMS are described and the functional and performance tests of COMS INR system were summarized according to the COMS IOT phases. Final performance testes were carried out using data sets acquired from the real-time COMS data pre-processing system. Geometric calibration accuracy of the COMS data showed excellent quality and met requirement specifications.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.08a
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• pp.256-256
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• 2010

투명전극부터 디스플레이 산업에 이르기까지 광범위하게 응용되어지고 있고 개발되어지고 있는 투명전도산화물(TCO)은 ZnO, In2O3, SnO2 등을 기본으로 하는 n-type 재료가 대부분이다. 그러나 투명전도 산화물을 이용한 light emitting diode(LED), 투명한 태양전지, p-형 TFT와 같은 투명전자소자의 개발을 위해서는 p-type 소재가 필수적이다. p-type TCO 소재는 비교적 연구 개발 실적이 매우 부진한 실정이었다. 1997년 넓은 밴드갭을 가지는 ABO2(delafossite) 산화물이 p-type으로서 안정적이라는 것을 보고함에 따라 이에 대한 연구가 활발히 진행되고 있다. 현재 ABO2 형태를 가진 Delafossite구조 산화물이 가장 유망한 p-type 투명전도체 소재로 거론되고 있다. Delafossite 구조가 p-type 투명전도체에 적합한 결정구조인 이유는 밴드갭이 넓고 공유결합에 유리하기 때문이다. Delafossite구조는 상온에서 2종류의 polytype(상온에서 Rhombohedaral구조와 hexagonal 구조)이 존재하며 이들은 각각 3R 및 2H의 결정 구조를 가지고 있다. ABO2의 delafossite구조에서 Cu+의 배열은 c-축을 따라 Cu-O-Cr-O-Cu의 연속적인 층 구조로서 2차원연결로 보여 진다. 보고된 Cu- base delafossite구조를 가지는 재료들은 CuAlO2, CuGaO2, CuInO2 등 여러가지가 있다. 본 연구에서는 PLD를 이용하여 c-plane 사파이어 기판위에 성장된 delafossite구조인 CuCrO2박막의 특성을 알아보았다. p-type 특성을 위하여 CuCrO2에 Zn를 첨가하였으며 그에 따른 구조적 전기적 특성을 조사하였다. 성장온도와 산소분압을 $500{\sim}700^{\circ}C$, 0~10mTorr로 변화시켜 특성을 연구하였다. 성장온도 $700^{\circ}C$, 산소분압 10mTorr에서 c-plane 사파이어 기판위에 c-축 배향의 에피성장된 CuCrO2:Zn 박막을 얻을 수 있었다. Mg를 도핑함에 따른 p-type 특성보다 현저히 떨어지는 것을 확인하였다. 또한 동일한 조건임에도 특정한 이차상의 존재를 통해 도핑된 Zn의 위치를 추측할 수 있었다. 온도와 분압에 따른 결정성과 표면상태를 SEM을 통해서 확인하였다.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2005.05a
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• pp.274-277
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• 2005

보다 위생적인 한우육 생산을 위해서는 단계별의 위해요소중점관리(HACCP)의 적용은 물론, 생산 및 유통단계에서 가축 및 축산물의 이동경로를 추적, 관리함으로써 생산, 가공 및 유통 정보가 투명하고 정확하게 소비자에게 제공되도록 각 단계의 정보들이 통합되어져야 한다. 또한 필수적으로 개체이력 관리체계 구축 및 추적을 위한 도축장 전산화, 판매장 전산화가 이루어져야 한다. 따라서, 생산${\cdot}$도축${\cdot}$가공${\cdot}$판매 단계의 정보를 통일화 할 수 있는 ID 체계 및 ID 식별 체계를 구축하고 각 단계에서 발생하는 정보를 공유하여 효율적이며 위생적인 생산이 될 수 있는 전산시스템을 구축하고 개체추적이 가능한 생산단계, 도축단계, 가공${\cdot}$판매단계 자동화 시스템이 개발 되어야 한다. 소비자 선호도 및 도축${\cdot}$가공 정보를 생산자, 관련기관 및 단체에 효과적으로 전달하여 차별화된 브랜드 개발을 유도하고 생축 및 한우육 유통단계를 투명화 하여 소비자 및 생산자의 이익을 극대화 시켜야 한다. 고품질 축산물을 소비자에게 안전하게 제공할 수 있도록 생산이력관리시스템을 구축하는 것은 궁극적으로 수입육과의 차별화 및 고품질 한우육 공급으로 국내산 한우육의 신뢰성을 회복하여 지속적이며 안정적인 한우 경영을 유지${\cdot}$발전의 기반을 마련하는 계기를 제공하는데 있다.

• Journal of Physiology & Pathology in Korean Medicine
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• v.20 no.3
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• pp.581-589
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• 2006

These studies were investigated the effects of Gamicheungpyehwadam-tang (CPHDT) on immune-cell regulation in association with bronchial asthma in OVA-induced mouse model. The administration of 400 mg/kg CPHDT significantly reduced the number of total cells in lung, peripheral lymph node and spleen in OVA-induced bronchial asthma mouse model. The administration of 400 mg/kg CPHDT significantly reduced $CD3^+,{\;}CD19^+$and $CD3^+,{\;}CD69^+$ cell numbers separated from lung, peripheral lymph node and spleen in OVA-induced bronchial asthma mouse model. CPHDT significantly reduced $CD3^+/CCR3^+,{\;}CD4^+,{\;}B220^+/IgE^+$, and $CD3^+/DX5^+$ cell numbers separated from lung, peripheral lymph node and spleen in OVA-induced bronchial asthma mouse model in a dose dependent manner, However, CPHDT significantly reduced $CD8^+$ cell numbers from only lung and spleen. The administration of CPHDT significantly reduced $NK^+$ cell numbers separated from lung of OVA-induced bronchial asthma mouse model in all concentrations, but 200 mg/kg CPHDT reduced $NK^+$ cell numbers separated from peripheral lymph node. These results suggest that CPHDT has anti-asthma and anti-allergy effects. In addition to, CPHDT may be useful treatment of asthma based on the further studies about the individual efficacy search of the components of CPHDT and the adding of variety drugs to CPHDT.

• Proceedings of the Korean Vacuum Society Conference
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• 2011.02a
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• pp.441-441
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• 2011

$TiO_2$ nanoparticles were grown on carbon fiber by atomic later deposition (ALD) with TTIP $(Ti(OCH(CH_3)_2)_4$ and $H_2O$ precusors. After sampe surfaces were treated by electron beam (1 MeV, 5 KGy), an improvement in the photocatalytic reacitivity of $TiO_2$ nanoparticles on carbon fiber was observed. An increase in the population of hydroxyl group on $TiO_2$ particles and the oxidation of carbon fiber were found upon e-beam exposure, whereas there was no noticeable changes of their morphology. It implies that those changes in O and C 1s state of $TiO_2$ particles/carbon fiber induced by e-beam treatment could be related to the enhancement of the photocatalytic activity. In contrast, when carbon fiber fully covered with $TiO_2$ thick films was treated with high-energy electron beam under same conditions, the improvement of photocatalytic activity as well as any changes in XPS spectra (Ti 2p, O 1s and C 1s) could not be found.

• Proceedings of the Korean Vacuum Society Conference
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• 2011.02a
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• pp.238-239
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• 2011

최근 반도체 산업은 더 높은 성능의 회로 제작을 통해 초고집적화를 추구하고 있다. 이를 위해서 회로 설계의 최소 선폭과 소자 크기는 지속적으로 감소하고 있고 이를 위한 배선 기술들은 플라즈마 공정을 이용한 식각공정에 크게 의존하고 있다. 식각공정에 있어서 반응가스의 조성은 식각 속도와 선택도를 결정하는 중요한 요소이다. 본 연구에서는 CIS QMS (closed ion source quadrupole mass spectrometer)를 이용하여 CF4+Ar를 이용한 실리콘 산화막의 플라즈마 식각 공정 시 생성되는 라디칼과 이온 종들을 측정하였다. Ar 이온이 기판표면과 충돌하여 기판물질간의 결합을 깨놓으면, 반응성 기체 및 라디칼과의 반응성이 커져서 식각 속도를 향상 시키게 된다. 본 실험에서는 2 MHz의 RPS (remote plasma source)를 이용하여 플라즈마를 발생시키고 13.56 MHz의 rf 전력을 기판에 인가하여 식각할 웨이퍼에 바이어스 전압을 유도하였다. CF4/(CF4+Ar)의 가스 혼합비가 커질수록 식각 부산물인 SiF3의 양은 증가 하였으며, CF4 혼합비가 0일 때(Ar 100%) 비하여 1일 때(CF4 100%) SiF3의 QMS 이온 전류는 106배 증가하였다. 이때의 Si와 결합하여 SiF3를 형성하는 F라디칼의 소모는 0.5배로 감소하였다. 또한 RPS power가 800 W일 때 플라즈마에 의해서 CF4는 CF3, CF2, CF로 해리 되며 SiO2 식각 시 라디칼의 직접적인 식각과 Si_F2의 흡착에 관여되는 F라디칼의 양은 CF3 대비 7%로 검출되었고, 식각 부산물인 SiF3는 13%로 측정되었다. Ar의 혼합비를 0 %에서 100%까지 증가시켜 가면서 측정한 결과 F/CF3는 $1.0{\times}105$에서 $2.8{\times}102$로 변화하였다. SiF3/CF3는 1.8에서 6.3으로 증가하여 Ar을 25% 이상 혼합하는 것은 이온 충돌 효과에 의한 식각 속도의 증진 기대와는 반대로 작용하는 것으로 판단된다.