• 제목/요약/키워드: research front

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다기능 전방 카메라 개발을 위한 영상 DB 구축 방법에 관한 연구 (A Study on the Image DB Construction for the Multi-function Front Looking Camera System Development)

  • 기석철
    • 한국자동차공학회논문집
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    • 제25권2호
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    • pp.219-226
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    • 2017
  • This paper addresses the effective and quantitative image DB construction for the development of front looking camera systems. The automotive industry has expanded the capability of front camera solutions that will help ADAS(Advanced Driver Assistance System) applications targeting Euro NCAP function requirements. These safety functions include AEB(Autonomous Emergency Braking), TSR(Traffic Signal Recognition), LDW(Lane Departure Warning) and FCW(Forward Collision Warning). In order to guarantee real road safety performance, the driving image DB logged under various real road conditions should be used to train core object classifiers and verify the function performance of the camera system. However, the driving image DB would entail an invalid and time consuming task without proper guidelines. The standard working procedures and design factors required for each step to build an effective image DB for reliable automotive front looking camera systems are proposed.

Distribution and Vertical Structures of Water Masses around the Antarctic Continental Margin

  • Kim, Seong-Joong;Lee, Bang-Yong
    • Ocean and Polar Research
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    • 제27권3호
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    • pp.277-288
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    • 2005
  • Spatial distribution and vertical structures of water masses around the Antarctic continental margin are described using synthesized hydrographic data. Antarctic Surface Water (AASW) over the shelf regime is distinguished from underlying other water masses by the cut-off salinity, varying from approximately 34.35 to 34.45 around Antarctica. Shelf water, characterized by salinity greater than the cut-off salinity and potential temperature less than $-17^{\circ}C$, is observed on the Ross Sea, off George V Land, off Wilkes Land, the Amery Basin, and the Weddell Sea, but in some shelves AASW occupies the entire shelf. Lower Circumpolar Deep Water is present everywhere around the Antarctic oceanic regime and in some places it mixes with Shelf Water, producing Antarctic Slope Front Water (ASFW). ASFW, characterized by potential temperature less than about $0^{\circ}C$ and greater than $-17^{\circ}C$, and salinity greater than the cut-off salinity, is found everywhere around Antarctica except in the Bellingshausen-Amundsen sector. The presence of different water masses over the Antarctic shelves and shelf edges produces mainly three types of water mass stratifications: no significant meridional property gradient in the Bellingshausen and Amundsen Seas, single property gradient where ASFW presents, and a V-shaped front where Shelf Water exists.

퀜치 시 초전도 한류기의 온도 (Temperature Behavior of Superconducting Fault Current Limiters during Quenches)

  • 김혜림;심정욱;현옥배
    • Progress in Superconductivity
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    • 제6권2호
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    • pp.108-112
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    • 2005
  • We investigated temperature behavior of superconducting fault current limiters (SFCLs) during quenches. Knowledge on temperature behavior during quenches is important to the design of SFCLs, because the temperature of SFCLs is related to their stability. SFCLs were fabricated by patterning $Au/YBa_2Cu_3O_7$ thin films grown on sapphire substrates into meander lines by photolithography. A gold film grown on the back side of the substrate was patterned into a meander line, and used as a temperature sensor. The front meander line was subjected to simulated AC fault currents, and the back line to DC current. They were immersed in liquid nitrogen during the experiment for effective cooling. Overall, temperature at the back side of SFCLs was close to that at the front side. It was closer at the beginning of faults, and at lower applied voltages. Temperature distribution at the back side was even except at the edge, as at the front side. These results tell that the whole SFCL was heated to similar degree during quenches, and that effective cooling of SFCLs at the back side is as important to the stability of SFCLs as at the front side. The results could be explained with the concept of heat transfer within the film.

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지수치를 이용한 Plus-size 여성의 하반신 체형 연구 (A Study of Lower Body Shapes of Plus-sized Women to Index)

  • 하희정;성옥진
    • 복식문화연구
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    • 제13권1호
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    • pp.6-17
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    • 2005
  • The purpose of this research is to define low body shapes of Plus-sized women at ages between 21 and 69 whose satisfied the Plus-sized judgment criteria took part in this study. This research also classifies different body types, and provides basic data for designing skirt's and slacks' prototypes according to each body type. Based on factor analysis of the measured data, seven key factors are grouped. And four different body types are classified based on the cluster analysis using factor marks. Type 1 refers to those who are tall in stature and balanced. This body type is characterized by trapezoid body shape when looked from the front, and slim the abdomen, bulge the belly and flat the buttocks when looked from the side. Type 2 refers to short and an obese body shapes, with trapezoid front and bulge abdomen and belly and flat the buttocks. Type 3 refers to those who are of medium height and long-legged body shapes, with rectangular front, protruding belly and buttocks. Type 4 refers to obese body shapes, with rectangular front, protruding abdomen and belly, flat the buttocks. 9 items are available to judge Plus-sized women's low body types and the hit ratio is 93.5%.

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동일 플렛폼 차량에 대한 저속 충돌시 손상성 수리성에 미치는 영향에 관한 연구 (A Study on Characteristics of Damageability and Repairability with Similar Platform Type at Low Speed 40% Offset Crash Test)

  • 임종훈;박인송;허승진
    • 한국자동차공학회논문집
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    • 제13권2호
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    • pp.108-113
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    • 2005
  • The damageability and repairability of similar platform type vehicles could be very concerned with design optimization. In all the vehicles crash tested, small size passenger vehicles were weakness in aspect of damageability and repairability. The most critical area appears to be repair cost considering that parts cost is the largest portion of total repair cost segments. Besides repair cost, attaching method of front sidemember and subframe are placed special importance for impact energy absorption and damageability and repairability. So in order to improve damageability and repairability of vehicle structure and body component of the monocoque type passenger vehicles, the end of front side member and front back beam should be designed with optimum level and to supply the end of front side member as a partial condition approx 300mm. The effectiveness of design concept on the 40% offset frontal impact characteristics of the passenger vehicle structure is investigated and summarized.

부인복 길원형 제도법에 관한 비교연구 (A Comparative Research on the Drafting Method of the Basic Basuc Bodice Patterns for Women)

  • 구미지
    • 대한가정학회지
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    • 제32권2호
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    • pp.219-230
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    • 1994
  • The purpose of this comparative research is to investigate the change of the drafting method of the basic patterns for women in Korea. Followings were the findings of this research: 1) The concept of the basic pattern could be found after the first of the 1950s and there was introduction of the many basic patterns. At first measurement couldn't be found. Gradually the personal body type could be expressed in the basic pattern through the practical measurements such as the width of highest bust level and the length of neck to bust. 2) Through the ages the changes of the basic patterns were between 1950,60s and 1980,90s distinctively at the back width back shoulder angle front and back shoulder height from biceps line back neck ratio(height/width) BP position at the biceps line the amounts of underarm dart underarm dart position from the biceps lines and front ease angle at BP line. 3) 4 Grouping the types of the basic pattern followings are their characters; 1st Munwha or Doreme style 2nd waist dart group 3rd underarm dart and rectangular front ease 4th the usage of many measurements like as front length upper bust girth etc.

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rf 마그네트론 스파터법에 의해 제조된 태양전지용 ZnO:Al 박막의 전기 광학적 특성 (Electrical and Optical Characteristics of ZnO:Al Films Prepared by rf Magnetron Sputtering for Thin Film Solar Cells Application)

  • 전상원;이정철;박병옥;송진수;윤경훈
    • 한국재료학회지
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    • 제16권1호
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    • pp.19-24
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    • 2006
  • ZnO:Al(AZO) films prepared by rf magnetron sputtering on glass substrate and textured by post-deposition chemical etching were applied as front contact and back reflectors for ${\mu}c$-Si:H thin film solar cells. For the front transparent electrode contact, AZO films were prepared at various working pressures and substrate temperature and then were chemically etched in diluted HCl(1%). The front AZO films deposited at low working pressure(1 mTorr) and low temperature ($240^{\circ}C$) exhibited uniform and high transmittance ($\geq$80%) and excellent electrical properties. The solar cells were optimized in terms of optical and electrical properties to demonstrate a high short-circuit current.

An Analog Front-End Circuit for ISO/IEC 14443-Compatible RFID Interrogators

  • Min, Kyung-Won;Chai, Suk-Byung;Kim, Shi-Ho
    • ETRI Journal
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    • 제26권6호
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    • pp.560-564
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    • 2004
  • An analog front-end circuit for ISO/IEC 14443-compatible radio frequency identification (RFID) interrogators was designed and fabricated by using a $0.25{\mu}m$ double-poly CMOS process. The fabricated chip was operated using a 3.3 Volt single-voltage supply. The results of this work could be provided as reusable IPs in the form of hard or firm IPs for designing single-chip ISO/IEC 14443-compatible RFID interrogators.

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단계별 이미지 적층법을 통한 디자인 구체화 과정에 관한 연구 (Study on the Design Materializing Process through a Stage of the 'Image Layered Technique)

  • 황인희;박경진
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2008년도 춘계학술대회 논문집
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    • pp.892-899
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    • 2008
  • In this research, adapted was the 'Image Layered Technique(ILT)' to determine the character-line of the nose. Moreover, to derive the image of the front and side views of the nose, analyzed were the heads of animals and transportations. Presented was the pattern with the image to determine the volume with a front outline. Also, the image to be suggested to 'ILT' was applied to a front character design.

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Effective Light Management of Three-Dimensionally Patterned Transparent Conductive Oxide Layers

  • Kim, Joon-Dong;Kim, Min-Geon;Kim, Hyun-Yub;Yi, Jun-Sin
    • 한국진공학회:학술대회논문집
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    • 한국진공학회 2012년도 제43회 하계 정기 학술대회 초록집
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    • pp.85-85
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    • 2012
  • For effective light harvesting, a design weighting should be implemented in a front geometry, in which the incident light transmits from a surface into a light-active layer. We designed a three-dimensionally patterned transparent conductor layer for effective light management. A transparent conductive oxide (TCO) film was formed as three-dimensional structures. This efficiently drives the incident light at the front surface into a Si absorber to yield a reduction in reflection and an enhancement of current. This indicates that an optimum architecture for a front TCO surface will provide an effective way for light management in solar cells.

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