• 대한전자공학회논문지SD
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• 제45권2호
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• pp.7-12
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• 2008

본 연구에서는 게이트 finger수가 증가될수록 드레인 전류의 증가율과 차단주파수가 감소되는 wide width effect를 관찰하였으며, 이 현상을 모델링하기 위하여 기존 BSIM3v3 RF 모델에 finger수에 무관한 외부 소스 저항을 새로 첨가한 개선된 SPICE MOSFET RF 모델을 개발하였다. 이러한 모델로 시뮬레이션된 Nf 종속 드레인 전류와 차단주파수는 기존 BSIM3v3 RF모델보다 $0.13{\mu}m$ multi-finger MOSFET의 측정데이터와 더 잘 일치하였으며, 이는 개선된 RF 모델의 정확도를 증명한다.

• 한국의상디자인학회지
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• 제17권3호
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• pp.159-168
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• 2015

In this study, visual evaluation was wide pants with changes in length of pants and width of hem line of wide pants design to provide data which can enhance wearing image effects at the production of wide pants. According to the length of pants and width of hem line of wide pants, a total of 9 stimulants were chosen. Then, they were evaluated using a seven-point rating scale against 40 fashion students. The data has been analyzed by Factor Analysis, ANOVA, $Scheff{\acute{e}}$'s Test and the MCA method. The results of the study are as follows : 1. According to factor analysis, the components of visual evaluation depending on the length of pants and width of hem line of wide pants were divided into five factors: individuality, body correction, modesty, body length and cute. 2. According to visual evaluation depending on changes in the length of pants, no significant difference was found in all five positions. 3. According to visual evaluation depending on changes in the length of pants and width of hem line of wide pants, 'width of hem line 60, 100' revealed a significant difference in body correction. 'width of hem line 80' revealed a significant difference in body correction and body length. 4. In terms of interactions over changes in the length of pants and width of hem line of wide pants, no interaction effects were found in all five factors. According to multiple classification analysis(MCA) on the factors without interaction effects, length of pants had more effect on visual image in body correction, body length and cute. In other factors, more influence was observed depending on the width of hem line.

• 대한전자공학회논문지SD
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• 제45권9호
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• pp.21-25
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• 2008

본 연구에서는 MOSFET의 RF 성능을 극대화하기 위해 단위 게이트 finger 폭($W_u$)에 대한 $f_T$ 및 $f_{max}$의 종속데이터를 측정하고 이 결과를 소신호 모델 파라미터들을 추출함으로써 새롭게 분석하였다. 이러한 물리적 분석결과로 $f_T$의 최대값이 존재하는 원인은 좁은 $W_u$에서 $W_u$에 무관한 parasitic gate-bulk capacitance와 넓은 $W_u$에서 트랜스컨덕턴스의 증가율이 감소하는 wide width effect에 의한 것임을 알 수 있다. 또한, $f_{max}$의 최대값은 게이트저항이 좁은 $W_u$에서 크게 줄어들고 넓은 $W_u$에서 점점 일정하게 되는 non-quasi-static effect에 의해 발생된다는 사실이 밝혀졌다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 봄학술 발표회 논문집(I)
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• pp.119-122
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• 2005

The purpose of this study is to evaluate a effect of girder-column width ratio to PC wide girder-column joint. Three half scale subassemblies were representing a portion of a protype structure were design, constructed, and tested to failure. From the test result, girder-column width ratio play an important role in the improvement of strength and ductility.

• 한국의류학회지
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• 제21권6호
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• pp.1060-1071
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• 1997

The purpose of this study is to identify the effect of clothing cues(sleeve and skirt width, length) on female impressions. The experimental materials developed for this study are a set of stimuli and response scales. The stimuli are 16 pictures manipulated with sleeve and skirt width · length variations by computer drawing. The experimental design consists of 3 factorial design: (1) sleeve shapes(plain, upper expanded, below expanded, all expanded) (2) skirt width (wide, narrow) (3) skirt length(long, short) The 7-point semantic differential response scale designed for visual evaluation of female' s impression formation on sleeve shape and skirt width · length is 27 bipolar adjectives. The results of this study are as follows: 1. When we analize the impressions of female figure by sleeve shape and width · length of skirt, it becomes clear that maturity, modernity, attention, elegance and tenderness are proved to be important. Among these five factors, maturity, modernity and attention are identified as more important ones. 2. Sleeve shape have an effect on all factors except maturity and the effects of sleeve on the four factors are not striking. ' Width of skirt are most influential to the maturity and attention, but it does not have any effect on modernity. However two factor, that is width of skirt and sleeve have an effects on modernity, attention and tenderness. ' The length of skirt has an effects on the tenderness, elegance and modernity, but it dose not have any effect on attention. But width and length of skirt have an effects on attention, tenderness and modernity The length of skirt and sleeve have an effect on tenderness.

• 한국의상디자인학회지
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• 제11권1호
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• pp.111-121
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• 2009

The purpose of this study is to investigate the effect of body type(thin, standard, fat), necktie width(narrow, medium, wide), gender(man, woman) on image formation. Sets of stimulus and response scales(7 point semantic) were used as experimental materials. The stimuli were 9 color pictures manipulated with the combination of necktie-width and body type using computer simulation. The subjects were 116 male undergraduates and 99 female undergraduates living in Gyeongsangnam-do. Image factor of the stimulus was composed of 4 different components, young-activity, attractiveness-gracefulness, stability, and boldness. In the young-activity, attractiveness-gracefulness and stability, body type and necktie-width showed independent effect. In the boldness, body type showed independent effect. Significant interaction effects of body type and necktie-width on young-activity, attractiveness-gracefulness and stability were found. For young-activity image, necktie of narrow width were effective. For attractiveness-gracefulness image, body type of standard were effective. For stability image, body type of standard and body type of thin on necktie of narrow and medium width were effective. The male fashion image can be perceived differently according to combination of the clues used in body type and necktie-width. Therefore, when the male fashion to create images that will have to consider the body type and necktie width.

• 반도체디스플레이기술학회지
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• 제18권4호
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• pp.69-74
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• 2019

The aim of this work is to investigate the effect of the microtip length in a slot-die head on coating of a fine poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) stripe. To this end, we have employed a meniscus guide with a 150-㎛-wide microtip and performed roll-to-roll slot-die coatings by varying its length between 500 ㎛ and 50 ㎛. When the microtip length is 150 ㎛ or shorter, we have observed three unexpected phenomena; 1) though the solution spreads much wider than the microtip width, yet the coated stripe width is almost the same as the microtip width, 2) the stripe width decreases, but the stripe thickness is rather increased with increasing coating speed at a fixed flow rate, 3) we obtain stripes much narrower than the microtip width at high coating speeds. It is due to the fact that 1) the meniscus is not well controlled by a short microtip, 2) the main stream of solution from the outlet is very close to the substrate and thus the distributed solution along the head lip merges with the main stream, and 3) the solution is not spread over the entire microtip end at high coating speeds, causing a tiny wobble in the meniscus. Using the 150-㎛-wide and 250-㎛-long microtip, we have fabricated 153-㎛-wide and 94-nm-thick PEDOT:PSS stripe at the maximum coating speed of 13 mm/s. To demonstrate its applicability in solution-processable organic light-emitting diodes (OLEDs), we have also fabricated an OLED device with the fine PEDOT:PSS stripe and obtained strong light emission from it.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2006년도 춘계학술대회
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• pp.59-62
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• 2006

Formability is requested to successfully develop of a metal bipolar plate for mass production. From this point of view, wider channel and land width is more helpful to improve formability. But the performance of the fuel cell can be affected by its channel and land shape. So it is very important to select proper channel and land shape not to deteriorate the fuel cell performance. In this work, 3-dimensional, non-isothermal numerical simulation was performed to analyse the effects of channel and land width on the fuel cell performance. 3 types of straight channel were selected for the numerical simulation. The simulation results reveal that wide channel and land width lower fuel cell performance and decrease voltage at a high current density region. Water activity, temperature, oxygen concentration distributions were investigated to find the reasons of performance degradation. The results show that wide channel and land width give an bad effect on fuel cell performance because of low cool ins efficiency and lack of oxygen gas under the land.

• 대한전자공학회논문지SD
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• 제40권9호
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• pp.638-643
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• 2003

Channel width dependence of hot-carrier effect in nMOSFET with shallow trench isolation is analyzed. $I_{sub}$- $V_{G}$ and $\Delta$ $I_{ㅇ}$ measurement data show that MOSFETs with narrow channel-width are more susceptible to the hot-carrier degradation than MOSFETs with wide channel-width. By analysing $I_{sub}$/ $I_{D}$, linear $I_{D}$- $V_{G}$ characteristics, thicker oxide-thickness at the STI edge is identified as the reason for the channel-width dependent hot-carrier degradation. Using the charge-pumping method, $N_{it}$ generation due to the drain avalanche hot-carrier (DAHC) and channel hot-electron (CHE) stress are compared. are compared.

• 토지주택연구
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• 제3권4호
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• pp.433-449
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• 2012

횡력을 받는 넓은 보와 기둥 내부접합부의 거동을 평가하기 위하여 넓은 보-기둥 접합부의 휨강성비와 유효폭 및 슬래브 유무를 변수로 6개의 1/2축소 모델 실험체를 제작하여 구조성능 평가를 수행하여 하중-변형, 연성, 강성 등을 평가하였다. 동 모델을 대상으로 비탄성해석을 수행하여 구조성능평가 결과와 비교하였다. 연구결과 도출된 결론은 다음과 같다. 넓은 보-기둥 내부 접합부는 중진지역인 국내에서 적용하고 있는 부분골조형 구조에 적용이 가능한 것으로 판단된다. 슬래브의 강성이 횡력을 받는 넓은 보-기둥 내부 접합부의 거동에 영향을 미치는 것으로 나타났다. 휨강성비가 2.0이상의 경우 T형보의 플랜지로서 슬래브 유효폭은 넓은 보 유효깊이의 2.0d로 평가되며, 휨강성비가 1.4~2.0일 경우, 슬래브 유효폭의 영향은 고려하지 않아도 되는 것으로 나타났다.