• 대한기계학회논문집B
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• 제29권10호
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• pp.1101-1110
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• 2005

In this paper we present the numerical results of the behavior of the horizontal vortex generated by ejecting a liquid vertically upward from an orifice into the bulk fluid above the orifice. The numerical calculation has been performed for the axi-symmetric Navier-Stokes equation. A simple flow-visualization experiment was also conducted to qualitatively verify the numerical solutions. Three cases of the flow configurations studied in this paper are; firstly, the vortex was generated without any background rotation, secondly, the vortex was made under a full background rotation, and thirdly, the vortex was made during the spin-up process such that only the region adjacent to the side wall was set into motion viewed in the inertial frame of reference. It was shown that the swirl flow at the inlet boundary affects considerably the formation and development of the vortex for the second case. In the third case, it was remarkable to see that the vortex cannot penetrate into the region near to the side wall of the tank, because of the strong swirl flow and corresponding high pressure gradient in the region.

• Journal of Astronomy and Space Sciences
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• 제23권3호
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• pp.269-288
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• 2006

We revised the OTFTOOL which was developed in Five College Radio Astronomy Observatory (FCRAO) for the On-The-Fly (OTF) observation. Besides the improvement of data resampling function of conventional OTFTOOL, we added a new SELF referencing mode and data pre-reduction function. Since OTF observation data have a large redundancy, we can choose and use only good quality samples excluding bad samples. Sorting out the bad samples is based on the floating level, rms level, antenna trajectory, elevation, $T_{sys}$, and number of samples. And, spikes are also removed. Referencing method can be chosen between CLASSICAL mode in which the references are taken from the OFFs observation and ELLIPSOIDAL mode in which the references are taken from the inner source free region (this is named as SELF reference). Baseline is subtracted with the source free channel windows and the baseline order chosen by the user. Passing through these procedures, the raw OTF data will be an FITS datacube. The revised-OTFTOOL maximizes the advantages of OTF observation by sorting out the bad samples in the earliest stage. And the new self-referencing method, the ELLIPSOIDAL mode, is very powerful to reduce the data. Moreover since it is possible to see the datacube at once without moving them into other data reduction programs, it is very useful and convenient to check whether the data resampling works well or not. We expect that the revised-OTFTOOL can be applied to the facilities of the OTF observation like SRAO, NRAO, and FCRAO.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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• pp.723-726
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• 2002

We give pressure stimulation into organic thin films and then manufacture a device under the accumulation condition that the state surface pressure is 10[mN/m]. In processing of a device manufacture, we can see the process is good from the change of a surface pressure for organic thin films and transfer ratio of area per molecule. The structure of manufactured device is Au/Poly-$\gamma$ Benzyl $_D$-Glutamate/Al; the number of accumulated layers is 1, 3, 5 and 7. Also, we then examined of the MIM device by means of I-V. The I-V characteristic of the device is measured from 0 to +2[V]. We determined electrochemical measurement by using cyclic voltammetry with a three-electrode system. LB film accumulated by monolayer on an ITO. In the cyclicvoltammetry, An Ag/AgCl reference electrode, a platinum wire counter electrode and LB film-coated ITO working electrode measured in $LiBF_4$ solution, stable up to 0.9V vs. Ag/AgCl.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 제4회 영호남학술대회 논문집
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• pp.101-104
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• 2002

Abstract We give pressure stimulation into organic thin films and then manufacture a device under the accumulation condition that the state surface pressure is 10[mN/m]. In processing of a device manufacture, we can see the process is good from the change of a surface pressure for organic thin films and transfer ratio of area per molecule. The structure of manufactured device is Au/Poly-${\gamma}$ Benzyl $_D$-Glutamate/Al; the number of accumulated layers is 1, 3, 5 and 7. Also, we then examined of the MIM device by means of I-V. The I-V characteristic of the device is measured from 0 to +2[V]. We determined electrochemical measurement by using cyclic voltammetry with a three-electrode system. LB film accumulated by monolayer on an ITO. In the cyclicvoltammetry, An Ag/AgCl reference electrode, a platinum wire counter electrode and LB film-coated ITO working electrode measured in $LiBF_4$ solution, stable up to 0.9V vs. Ag/AgCl.

• 융합신호처리학회논문지
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• 제11권2호
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• pp.137-142
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• 2010

다 모델 음성인식기는 잡음환경에서 매우 우수한 성능을 보이는 것으로 평가되고 있다. 그러나 지금까지 다 모델 기반인식기의 성능시험에는 잡음에 대한 적응을 고려하지 않은 일반적인 전처리 방식이 주로 활용하였다. 본 논문에서는 보다 정확한 다 모델 기반인식기에 대한 성능 평가를 위해서 잡음에 대한 강인성이 충분히 고려된 전처리 방식을 채택하였다. 채택된 전처리 알고리듬은 ETSI (European Telecommunications Standards Institute)에서 DSR (Distributed Speech Recognition) 잡음환경을 위해서 제안된 AFE (Advanced Front-End) 방식이며 성능비교를 위해서 DSR 환경에서 좋은 성능을 나타낸 것으로 알려진 MTR (Multi-Style Training)을 사용하였다. 또한, 본 논문에서는 다 모델 기반인식기의 구조를 개선하여 인식성능의 향상을 이루고자 하였다. 기존의 방식과 달리 잡음음성과 가장 가까운 N개의 기준 HMM을 사용하여 기준 HMM의 선택시에 발생할 수 있는 오류 및 잡음신호의 변이에 대한 대비를 하도록 하였으며 각각의 기준 HMM을 훈련을 위해서 다수의 SNR 값을 이용함으로서 구축된 음향모델의 강인성을 높일 수 있도록 하였다. Aurora 2 데이터베이스에 대한 인식실험결과 개선된 다 모델기반인식기는 기존의 방식에 비해서 보다 향상된 인식성능을 보임을 알 수 있었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 하계학술대회 논문집
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• pp.275-276
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• 2009

We have studied physical properties of organic light-emitting diodes (OLEDs) in a device with 7,7,8,8-tetracyanoquinodimethane (TCNQ). Since the TCNQ has a high electron affinity, it is widely used for a charge-transport and injection layer. And the TCNQ-derivatives have also been used to control the conductivity of the materials. It is known that a charge injection and transport in OLEDs with a TCNQ-derivative enhances a performance of the devices such as operating voltage and efficiency. To see how the TCNQ affects on the device performance, we have made a reference device in a structure of ITO(170nm)/TPD(40nm)/$Alq_3$(60nm)/LiF(0.5nm)/Al(100nm). And several type of devices were manufactured by doping TCNQ either in TPD or $Alq_3$ layer. The TCNQ layer was also formed in between the organic layers. N,N'-diphenyl-N,N'-di(m-tolyl)-benzidine (TPD), tri(8-hydroxy quinoline) aluminium ($Alq_3$), and TCNQ layers were formed by thermal evaporation at a pressure of $10^{-6}$ torr. The deposition rate was $1.0{\sim}1.5\;{\AA}/s$ for TPD, and $1.0{\sim}1.5\;{\AA}$ for $Alq_3$. The LiF was thermally evaporated at a deposition rate of $0.2\;{\AA}/s$ successively. The device with TCNQ-derivative improved the turn-on voltage compared to the one without TCNQ-derivative.

• 한국ITS학회 논문지
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• 제15권4호
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• pp.26-32
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• 2016

자율주행자동차는 운전자의 조작 없이 목표지점까지 스스로 주행환경을 인식하여 운행하는 최첨단 자동차를 말하며 위성항법장치, 센서 등으로 위치를 측정하고 주행환경을 인식, 연산장치로 가감속 차선변경 등 자율주행을 제어한다. 최근, 자동차 산업은 기존 기계공학과 정보통신, 센서, 위성항법 등 첨단기술이 총 집약된 자율주행 자동차로 빠르게 진화중이다. 교통안전 정책과제 분석은 Issue-Tree를 활용하여 분석하였다. Issue-Tree 방법론은 복잡한 문제를 세분화하여 구체화하고, 체계적으로 접근하는 문제해결 도구로 자율주행자동차 도입에 따른 교통안전 관련 Issue의 해결을 위한 정책과제를 도출하기 위해 사용된다. 교통안전 정책과제를 분석하기 위해는 우선 미래 사회 및 교통여건 변화로부터 Key Word를 도출하고, 이와 연계되는 국내외 도로교통 정책/계획을 확인하여 국내외 도로 교통 정책목표 Key Word를 도출하였다. 도출된 정책목표 Key Word로부터 핵심적인 Issue를 도출하였는데, 이때 Issue-Tree 방법을 통해 체계화하였다.

• 패션비즈니스
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• 제23권5호
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• pp.1-18
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• 2019

The purpose of this study is to analyze the Muslim fashion that has recently appeared in the global fashion collection to see how the global fashion brand expresses Muslim's traditional costumes so as to provide references in design development to prepare for the larger Muslim fashion market in the future. In order to analyze Muslim fashion, keywords related to Muslims such as "Muslim," "Islamic fashion" and "hijab" were searched on Google, Samsung Design Net and Vogue websites, and a total of 370 fashion photos were selected for the final data, which was judged to reflect Muslim fashion styles after a review by four clothing experts. Muslim fashion styles have the following characteristics: Above all, the use of veils was most noticeable, with many T-shaped loose long tunic dresses. The hijab, which had the highest proportion of veils, was used to produce various images with wide range of materials and colors. Achromatic colors were the most common, but more than three colors were used to create an exotic image. There have also been cases of using direct religious images such as arabesque patterns and mosques and Muslim priests. As a final, Muslim fashion styles were studied follow: first, a unique style using a veil. Second, conservative style with minimal exposure, third, restrained long-and-lose fit style, fourth, exotic style by elaborate pattern. The domestic fashion industry is also expected to generate economic demand if it is designed with reference to such collection trends along with market research on Muslim consumers.

• 대한한의학원전학회지
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• 제30권1호
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• pp.167-184
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• 2017

Objectives : The paper attempted to analyze the contents found in the networks of five viscera in Yixuerumen's Zangfutiaofen published by Li Chan in 1575, and tried to reveal the body structure dealt in the contents through anatomical verification. Methods : Books such as Huataxianshengneizhaotu, Tushupian, and Shisijingfahui were used to compare, understand, and interpret the original texts and annotations of Yixuerumen in an attempt to verify these through anatomy reference texts and computer programs. Results : In Yixuerumen, some contents of the networks of five viscera were revised to see feixi as not one but two, and explained the relationship of intestinal organs through heart and lung. Anatomically speaking, the networks of five viscera has a vertical structure that unfolds top to bottom centering on aorta, and has many organs connected to it such as trachea, esophagus, splenic artery, pulmonary trunk, ureter, mesentery arteriovenous, gonadal artery, and ductus deferens. Conclusions : The networks of five viscera has a great significance in that it is the fruit of much efforts where oriental medicine tried to explain not only the functions of five viscera, but also the creation and circulation of qi, blood, and bodily fluids through anatomical observation.

• 한국의상디자인학회지
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• 제12권1호
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• pp.25-34
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• 2010

Design in the 21st Century requires showing extraordinary and revolutionary possibilities by merging multiple cultures or different art forms. 21C fashion also increases its's complexity through the blending in of other design field's styles and forms. In other words, 21C's fashion design involves not only clothing, but combines techniques, aspects and functions fulled from various design categories. As a result, Current fashion design becomes more unique, and shows various styles. From this point of view, this study focuses on creating and suggesting unique textile designs through the understanding of design processes of textiles, which are inspired by high tech architectural structures. The fundamental shape of the architectural structures were simplified into thick lines and geometric shapes. these design elements were then transferred into textile designs. As a result, unique textile looks were created, and were applied to the apparel designs by CAD to see 3d simulations. Exchanging or merging ideas of different design categories leads innovative and fresh looks. 21C is rapidly changing, and designers need to continually introduce new looks every season. Incorporating 21st Century consumption patterns, designers must understand the process of creating original designs through various methods. The innovative fabric designs for this study involved a creative process of drawing from a step by step breakdown of two separate design fields, which were then merged into one finished design. The data and research from this study can be used as a reference tool for any further applicable fashion and textile designs in the future.