• 한국의상디자인학회지
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• 제3권1호
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• pp.117-127
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• 2001

In the 1980's discuss in the postmodernism and at the 1990's that is globalization. Globalization is the compression of time and space. That is the products of modernism and postmodernism. Global trends are the multiculturalism, localism, tribuism, etc. These trends have a important effect modern fashion. 20th fashion have a modernity -variation, functionalism and popularity, postmodernity-uncertainty, multiculturalism, post structuralism, etc. If Korean fashion have the globality, open to the world other country and culture, deep study of that, and view point of intercultureity. This Study Suggest to achieve globalize of Korean costume. 1. Plon up base on the scholastic study of giobalization. 2. Promote global project of Korean collection. 3. Collect of ethnic, culture, information of fashion America, Europe, etc. and make high up our a sense of disorimination. 4. Manifold studing abroad 5. Strergthening of globalization and ethnic curriculum on Educational course

• Korea-Australia Rheology Journal
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• 제15권3호
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• pp.117-124
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• 2003

Elastohydrodynamic lubrication (EHL) film is measured under the condition of viscosity index improver added to base oil. In-situ optical contact method using the interference principle make the measuring resolution of ~5 nm possible and enables the measuring range all over the contact area of up to ~300 $\mu\textrm{m}$ diameter. What is more important to the developed method by the author is that the measurement of EHL film thickness is possible in the range from 100 nm to 2 $\mu\textrm{m}$, which is the regime of worst contact failures in precision machinery. Viscosity index improver (VII) is one of the major additives to the modem multigrade lubricants for the viscosity stability against temperature rise. However, it causes shear thinning effects which make the film thickness lessened very delicately at high shear rate (over $10^5 s^{-1}$) of general EHL contact regime. In order to exactly verify the VIIs performance of viscosity stability at such high shear rate, it is necessary to make the measurement of EHL film thickness down to ~100 nm with fine resolution for the preliminary study of viscosity control. In this work, EHL film thickness of VII added lubricant is measured with the resolution of ~5 nm, which will give very informative design tool for the synthesis of lubricants regarding the matter of load carrying capacity at high shear rate condition.

• 제어로봇시스템학회논문지
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• 제13권5호
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• pp.499-506
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• 2007

The tiny camera module used in a modern cellular phone requires precise assembly processes. To meet the requirement of high resolution and functionality, the number of parts used in a camera module becomes larger and larger. As the market grows rapidly, an automatic camera phone assembly process is required. However, diverse production line and short life cycle make it difficult to build an affordable assembly line. To attack this problem, a flexible and expandable lens assembly system is proposed. To save the manufacturing line set-up time, modular concept is adopted. Also, each module is designed to have intelligence to simplify the set-up process. The assembly system is built up on the standard flat-form that includes a vibration free base, air and electric supplies, and electronic controllers, etc. Furthermore, the assembly cell has the capability of handling tiny, thin, or transparent parts which are very difficult to identify without machine vision.

• 한국정밀공학회지
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• 제16권4호통권97호
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• pp.37-45
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• 1999

Many automated welding equipment are used in the industry. However, there are some problems to get quality welds because of the geometric error, thermal distortion, and incorrect joint fit-up. These factors can make the gap between base plates in case of a thick plate welding. The welding product with the quality welds can not be obtained without consideration of the gap. In this paper, the robot path and welding conditions are modified to get the quality weld by detecting the position and size of the gap. In this work, a low-priced laser range sensor is used. The 3-dimensional information is obtained using the motion of a robot, which holds a laser range sensor. The position and size of the gap is calculated using signal processing of the measured 3-dimensional information of joint profile geometry. The data measured by a laser range sensor is segmented by an iterative end point method. The segmented data is optimized by the least square method. The existence of gap is detected by comparing the data with the segmented shape of template. The effects of robot measuring speed and gap size are also tested. The recognizability fo the gap is verified as good by comparing the real joint profile and the calculated joint profile using the signal processing.

• 한국전기전자재료학회논문지
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• 제21권10호
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• pp.889-895
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• 2008

This paper presents a comprehensive mathematical analysis and simulation of trench IGBT with the help of PIN-PNP combinational model. Since trench IGBT is characteristically influenced by PIN diode, it may be almost impossible to analyze the trench IGBT using PNP-MOS modeling methods, even PIN-MOS techniques which neglect the hole current components coming into p-base region. A new PIN-PNP complementary cooperational model is developed in order to make up the drawbacks of existing models. It would allow us to make qualitative analysis as well as simulation about switching and on-state characteristics of 1,700 V trench IGBT. Moreover, if we improve the PIN diode effects through the optimization of trench structure, trench IGBT is expected to be one of the most promising devices in the not only high-voltage but also high speed switching device field.

• 대한치과기공학회지
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• 제28권2호
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• pp.331-346
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• 2006

Free-end partial dentures, which are supported by teeth surrounded by dental root membranes and elastic mucous membrane tissues, may cause stress to the abutment teeth due to external force imposed on the denture base, increase the mobility of the abutment teeth, and bring about a change in the periodontal tissue. General retainers used in partial dentures are categorized into clasp, attachment, and Konus crown. Stress imposed on the abutment teeth and mobility of the denture base have relations with the lifetime of a crown and abutment teeth, and have direct relations with the chewing ability. Thus, a need arises to make a comparative analysis of stress of the three direct retainers on the abutment teeth and interpret the mobility of the denture base. This study designed three kinds of removable partial dentures (one kind of attachment partial denture, one kind of Konus crown partial denture, and one kind of clasp partial denture), and fabricated Dentiforms of bilateral partial dentures (Kennedy Class I) with lower left 1st premolar and lower right 1st and 2nd premolars being as the abutment teeth. A strain gauge was installed in the mesial and distal surface of the lowerr left 1st premolar (No. 34) of the fabricated dentiform and in the lower part of the denture base, and installed were a clasp partial denture, an attachment partial denture, and a Konus crown partial denture. Then, the vertical static load of 5kgf and 7.5kgf at the occlusion surface of the lower left No. 6 molar was generated for a total of 20 frequencies of load each using a push-full gauge, and thus a change in the output of the strain gauge was measured. With the respective application of Konus crown, attachment and RPI clasp in the free-end partial denture, surveyed was the distribution of stress imposed on the abutment teeth and the denture base according to the location of occlusion force load so as to come up with the following results. 1. Konus crown and attachment partial dentures generated much stress, and more stress on the abutment teeth than RPI clasp dentures did. Attachment dentures tended to further intensify stress on the abutment teeth than Konus crown dentures did. 2. Attachment dentures and Konus dentures imposed less stress on the denture base than RPI clasp dentures did. There was no stress difference between Attachment and Konus crown dentures. 3. Dentures that were designed with the application of retainers using sturdy linkage methods tended to be less mobile.

• 디지털콘텐츠학회 논문지
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• 제18권1호
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• pp.141-147
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• 2017

스케일러블 HEVC에서 상위계층의 계층 간 예측에서 기본계층의 부호화 잔차 영상에 대한 업샘플링 된 결과를 참조하여 예측하게 된다. 본 논문에서는 고효율 영상 압축 기반 스케일러블 부호화 (Scalable Extension of High Efficiency Video Coding)에서 상위계층 잔차 데이터 예측에 대한 개선 기법을 제안한다. 제안하는 적응적 필터 선택 기법은 스무싱 필터와 샤프닝 필터를 사용함으로써 계층 간 예측 방법에서 효율을 향상시킨다. 기존의 업샘플링 필터와 두 개의 필터를 추가하여 율-왜곡 비용함수 기반의 경쟁기법을 통한 계층 간 예측 알고리즘을 SHVC 5.0에 구현함으로써 Y, U, V 컴포넌트에 대한 평균 1.5%, 2.1%, 1.7%의 BD-rate 향상을 보여준다.

• 지적과 국토정보
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• 제47권2호
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• pp.185-199
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• 2017

본 연구는 예측하기 어려운 미래의 다양한 수요를 수용하기 위하여 재조합방법을 통한 공간정보제품 제작방법을 제안한다. 현재의 측량중심의 공간정보제품의 생산방안은 특정 지도제품 중심의 Top-down방식이므로 공간정보의 활용 확산 관점에서는 한계점을 가지고 있다. 이는 불특정 다수를 위한 공간정보의 활용성 관점보다는 모두를 위한 지도라는 관점에서 다양한 수요를 만족시키기에는 한계가 있다. 이런 한계점을 해결을 위해 사용자 맞춤형의 Bottom-up방식 공간정보 생산과 재조합을 통한 공간정보 제품 제작이 요구되고 있다. 이를 위해 본 논문은 기존의 Top-down 방식의 결과인 수치지도와 재조합을 통한 공간정보제품의 제작에 대한 이론적 고찰과 비교를 통해 보완 방안을 제안하였다. 이는 공간정보를 기초속성을 가지는 형태와 관계된 속성정보를 가지는 데이터로 재분류하고 각 데이터에 관계성 및 관리에 관한 속성을 부여하는 방안이다. 이 방법의 실효성 증명을 위해 기존 수요의 만족 가능성과 미래 수요의 대응 가능성을 중심으로 적용사례를 도출하였다, 그리고 기존의 국가기본도, 주제도, 향후 수요 예측 제품의 해당 대표제품을 제작하여 확인하였다.

• 한국산업융합학회 논문집
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• 제23권5호
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• pp.875-880
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• 2020

In this paper, a novel 3-DOF hybrid robot with enlarged workspace is presented for high speed applications. The 3-DOF hybrid robot is made up of one linear actuator and 2-DOF planar parallel robot in series. The actuation consists of one ball-screw to make one linear motion and two rotary ball-screws to transmit rotational motion to 2-DOF parallel robot. The workspace can be enlarged according to ball-screw stroke and the moving inertia can be reduced due to locating all the heavy actuators at the fixed base. The inverse kinematics and workspace analyses are presented. The robot prototype and PC-based control system are developed.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1994년도 봄 학술발표회 논문집
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• pp.203-208
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• 1994

These tests were conducted to get a device high strength concrete products in factory using admixtures for high strength concrete. The superplasticzer was used to compensate low slump of base concrete keeping its slump up about $6\pm1cm$. To examine the property for strength revelation of concrete using admixtures for high strength concrete, steam and standard curing were compared each other. Test results show that admixtures for high strength concrete is effective in steam curing and compressive strength 500kgf/$\textrm{cm}^2$ is obtained at one day, 650kgf/$\textrm{cm}^2$ at 28days as added to concrete at the ratio of 10-15%, and 740kgf/$\textrm{cm}^2$ at the ratio of 30%. Therefore admixtures for high strength concrete is effective in steam curing and make it possible to get high strength concrete using only steam curing not using autoclave curing.