• 반도체디스플레이기술학회지
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• 제9권2호
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• pp.55-60
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• 2010

Ink transfer process from the printing roll to the moving web was investigated using a CFD technique for the application in R2R printed electronics. In line with the requirement that the web handling speed needs to be increased further for the cost competitiveness, the effects of web moving velocity with relatively complex roll patterns were analyzed. To make the present analysis more realistic, the numerical geometry and the ink properties were selected to match those of the real printing production system. Our numerical results showed that both web handling speed and complex printing-roll patterns influenced the shape of the transferred ink. As the web moving speed approaches towards 30mpm, a significant distortion of the shape of the transferred ink occurred. In the range of pattern width smaller than 100 microns, a phase distortion was also found to occur in all the printing-roll patterns considered in the present work but the ratio of the phase distortion to the line width gets smaller as the width becomes smaller. Thus, the web handling speed and the shape of printing-roll pattern will be important elements for the better printing quality under 100 micron line width range.

• 복식
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• 제30권
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• pp.201-210
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• 1996

The perpose of this study is to compare and to analyze the characters of the shape of up-per arm and armscye line between young and aged women. The subjects were measured with the Mar-tin's anthropometer and with free curve ruler. 10 items in the shape of upper arm were measured and 16 items in the shape of armscye line measured indirectly based on the measured shape taken from the subjects with free curve ruler and both date were analyzed. Mean standard deviation f-test factor analysis were performed for the statistical analysis of the date. The main results were as follows: 1) The shape of the upper arm is long and narrow in youg women compared with aged. 2) The length of the axilla of the aged women were longer than that of young women. 3) There are significant differences young and aged women on the shape of armscye line. THe length of from the front point of axilla to shoulder point width and depth of the shape of the armscye line length of axilla of aged women were longer than that of young. but the length of from the back point of axilla to shoulder point of yyoung women was longer than aged. 4.) The front point of axilla was existed lower than back point of axilla in aged women while front point of axilla was existed higher than the back point in young. 5) Through the factor analysis two factors were obtained from the shape of the upper arm and five factors from the shape on armmscye line in both groups. Factor compornents in the shape of the up per arm were length width and girth of that and in the shape of the armscye line were width and length of upper and lower back and front part of the shape of the armscye line depth of the axilla. he items in the same factor were resemble each other between two groups.

• 한국산학기술학회논문지
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• 제7권3호
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• pp.385-392
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• 2006

본 논문은 오프라인 필기체 한글 인식을 위한 요소 기술의 하나인 자소 분할을 위한 새로운 자획 추출법을 제안한다. 수평 런 길이를 이용하여 자소의 자획을 수직, 경사, 수평으로 구분 분리한다. 수직 자획이나 경사 자획의 수평 런 길이는 자획 두에가 되며, 수평 자획의 수평 런의 개수가 자획 두께가 된다. 수평 자획을 분리 추출한 후, 끊어진 수직, 경사 자획을 자획 두께의 수평 런으로 연결하여 분리한 자획들이 문자의 특징을 나타내게 한다. 추출된 자획들은 온라인 필기체 한글 인식 시스템에서 개발 사용되고 있는 자획 사전 정합을 통해 문자 인식을 할 수 있다.

• 패션비즈니스
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• 제10권4호
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• pp.55-69
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• 2006

The purpose of this study is to evaluate the differences of visual effects by variations in the location and width of the waist band of one-piece dress. The stimuli are 24 samples: 8 variations of the location of the waist band and 3 variations of the width of the waist band. The data has been obtained from 50 fashion design majors. The data has analyzed by Factor Analysis, Anova, Scheffe's Test and the MCA method. The results of the study are as follows: According to the result of factor analysis of the visual effects based on the changes in the location and width of waist bands for one-piece dress, four factors were identified - verticality of whole-body, horizontality of upper-body, curves of lower-body and shape of breast. Whole-body verticality and upper-body horizontality were found to be the most important factor among them. In all of the four factors of the visual effects, significant differences were observed according to the location of the waist bands for one-piece dress. The visual effects were evaluated positively when the waist bands were positioned above the natural waist line and negatively when the waist bands were positioned below the natural waist line. In addition, significant differences were observed in the visual effects according to the width of waist bands when the waist bands were positioned above the natural waist line, and visual effects were better when the band width was 3.5cm and 4.5cm than the others. The interaction of the visual effect showed significant differences in horizontality of upper-body, curves of lower-body and shape of breast.

• Restorative Dentistry and Endodontics
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• 제18권2호
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• pp.291-316
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• 1993

Restorative procedures can lead to tooth fracture due to the relatively small amount of the remaining tooth structure. It is essential to prevent fractures by having a clear concept of the designs for cavity preparations. Among the several parameters in cavity designs, profound understanding of isthmus width factor would facilitate selection of the appropriate cavity preparation for a specific clinical situation. In this study, MO amalgam cavity were prepared on maxillary first premolar and filled with amalgam. Three dimensional, model with 1365 8-node brick elements was made by serial photographic method. In this model, isthmus was varied in width at 1/4, 1/3, 1/2 and 2/3 of intercuspal width and material properties were given for three element groups, i.e., enamel, dentin and amalgam. A load of 500 N was applied vertically on amalgam and enamel. In case of enamel loading, 2 model (with and without amalgam) was compared to consider the possibility of play at the interface between tooth material and amalgam. These models were analyzed with three dimensional finite element method. The results were as follows: 1. The stress was concentrated on the facio-pulpal line angle and distal marginal ridge of the cavity. 2. With the increase of the isthmus width, the stress spread around the facio-pulpal line angle and the area of stress concentration moved toward the proximal box. 3. In case of narrow isthmus width, the initiation point of crack would be in the area of isthmus corner of the cavity, and with the increase of the isthmus width, it would move toward the proximal box and at the same time the possibility of crack increase at the distal marginal ridge. 4. The direction of crack progressed outward and downward from the facio-pulpal line angle, and with the increase of the isthmus width, it approximated vertical direction. At the marginal ridge, it occurred in vertical direction. 5. It would be favorable to make the isthmus width narrower than a third of the intercuspal width, and to cover the cusp if isthmus width were wider than half of the intercuspal width. 6. It is necessary to apply the possibility of play to the finite element analysis.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1993년도 춘계학술대회 논문집
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• pp.96-99
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• 1993

대면적 액정 표시판 (Liquid Crystal Display:LCD) panel내(內)의 구동소자인 비정질 실리콘 (amorphous silicon) 박막 트랜지스터 (Thin Film Transistor:TFT)의 구동신호전달 소자특성 향상을 위한 본(本) 연구의 목적은 액정 panel TFT 제조공정 상(上)의 증착금속 전극박막들의 Test Elements Group(TEG) metal line pattern별(別) 전기적 저항특성 평가에 있다. 현(現) TFT 전극용(用)으로 개발이 진행 중(中)인 Aluminum(Al), Tantalum(Ta) 및 Chromium(Cr) 이 특성평가 대상 금속 박막으로 선정 되었으며, 이들 금속막의 증착 thickness 와 TEG metal line width가 저항특성 변수로 성립 되었다. 본(本) 실험을 통해 금속 박막의 TEG line width별(別) 체적(體積)저항 (bulk resistance), 면(面)저항(sheet resistance), 비(比)저항 (resistivity) 및 기판 상(上)의 metal pattern 위치 변화에 따른 전기적 저항 uniformity 특성변화 평가가 있었다. TEG metal line 측정 변위에 따른 저항율의 선형변화 특성도 연구 되었으며, metal line별(別) 전기적 연속, 불연속 배선 단락 특성(electrical continuity test) 관찰도 있었다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 V
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• pp.2851-2854
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• 2003

The purpose of this paper was to find out the stabilized and effective value of RC-parameter by using PSpice simulation, considering that gate signal voltage can be distorted by RC-delay of signal line. the results of this study were as follows: TFT-LCD with high quality resolution increased the number of gate signal line and this made TFT on-time shorter over-width of signal line to improve the performance of TFT made the electrostatic capacity increase and the time constant higher, making problems and errors. and owing to the decrease of the aperture ratio, an electro optic character of LCD, we must consider the capacity and the condition of production process in deciding the width and the thickness of the gate signal line.

• 한국전산유체공학회지
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• 제13권1호
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• pp.1-6
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• 2008

Direct Write Technologies are being utilized in various industrial fields such as antennas, engineered structures, sensors and tissue engineering. With Direct Write Technologies, producing features have the mesoscale range, from 1 to 100 microns. One form of the Direct Write Technologies is based on aerosol dynamics. The shape of deposited aerosols determine the form of products in the Direct Write Technology based on aerosol dynamics. To predict shape of deposited aerosol, a prediction model is created. In this study, we estimated Line-Width and Line-Thickness from the prediction model. Results of prediction model is valid from comparison with experimental results.

• 한국레이저가공학회지
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• 제3권2호
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• pp.25-33
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• 2000

One of perspective direction of microfabrication is direct laser writing technology that allows to create metal, semiconductive and dielectric micropatterns on substrate surface. In this work, a two step method, the combination of seed forming process, in which metallic Al seed was selectively generated on AlN ceramic substrate by direct writing technique using a pulsed Nd : YAG laser and subsequent electroless Ni plating on the activated Al seed, was presented. The effects of laser parameters such as pulse energy, scanning speed and pulse frequency on shape of Alseed and conductor line after electroless Ni plating were investigated. The nature of the laser activated surface is analyzed from XPS data. The line width of this metallic Al and Ni is analyzed using SEM. As a results, Al seed line with 24㎛ width and 100㎛ isolated line space is obtained. Finally, laser direct writing can be applied in the field between thin and thick film technique in electronic industry.

• 전기전자학회논문지
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• 제22권3호
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• pp.882-885
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• 2018

시스템의 동작 속도가 빨라짐에 따라 인쇄 회로 기판(PCB: printed circuit board)에서 신호 무결성 문제가 매우 중요해지고 있다. 지금까지는 관습적으로 PCB 면적을 줄이고 가격을 낮추도록 설계하는데 치중해왔다. 그러나 초고속으로 동작하는 PCB에서는 유전체 특성, 배선 폭, 배선 간격, 임피던스 정합 등을 고려하여 정밀하고 세심하게 설계하지 않으면 제대로 동작하기 어렵다. 본 논문에서는 초고속 PCB에서 생기는 여러 가지 문제점과 이를 완화할 수 있는 다양한 설계 기법에 대해 살펴본다.