• 제목/요약/키워드: Waffle structure

검색결과 9건 처리시간 0.024초

Waffle-Iron 도파관 여파기 설계 (Design of Waffle-Iron Waveguide Filter)

  • 고지환;조영기
    • 한국전자파학회논문지
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    • 제18권11호
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    • pp.1318-1326
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    • 2007
  • 본 논문에서는 waffle-iron 도파관 여파기의 실용적인 설계 방법을 기술하였다. 설계 과정은 두 단계로 이루어진다. 첫 단계로는 waffle-iron 구조의 단일 window에 대해 EM S/W tool를 이용하여 S-파라미터를 구하고, ABCD 파라미터로 변환하여 K-인버터를 계산하고, 두 번째 단계는 분포 정수 원형 여파기와 일치되게 window의 크기를 최적화한다. 설계 방법을 검증하기 위해 위성통신용 Ka 대역 여파기를 설계하고 제작하였다. 측정 결과는 계산 결과와 비교하여 양호하게 일치하였다.

초저저항 MOS 스위치의 최적 배치설계 (Optimal Layout Methods for MOSFETs of Ultra Low Resistance)

  • 김준엽
    • 대한전기학회논문지:시스템및제어부문D
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    • 제51권12호
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    • pp.596-603
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    • 2002
  • New layout methods for implementing MOS switches of ultra low channel resistance are presented. These area-effective layout methods include the waffle structure, zipper structure, star zag structure and fingered waffle structure. The design equations for these new layout structures are analyzed. The area-effectiveness of these structures is compared with that of the conventional alternating bar structure. MOS switches of the waffle structure were fabricated using a standard 0.25um CMOS process. The experimental characterization results of the fabricated MOS switches are presented. The analytical comparison and experimental results show that area reductions over 40% are achievable with the new structures.

구조요소의 단면특성에 따른 와플슬래브의 동적특성 분석 (Study on the Performance of Waffle slab by Variation on the Section Properties of the Constituent Structural Elements)

  • Choong, K.K.;Kim, Jae-Yeol;Kim, Kwang-Il;Kang, Joo-Won
    • 한국공간구조학회논문집
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    • 제9권1호
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    • pp.61-68
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    • 2009
  • 본 연구는 와플구조의 구조적 거동에 파악하고자 한다. 와플슬래브의 두께, 주요 보의 깊이와 기둥의 크기를 변수로 하여 와플구조의 모드형상과 고유진동수를 파악하고자 하였다. 또한 쉘요소와 입체요소를 사용한 유한요소모델의 해석결과를 비교하였다. i)레벨2에서 주요 보의 깊이가 증가함에 따라, ii)레벨3에서 와플슬래브 두께가 감소함에 따라 모드진동수는 증가하였다. 3차원 모델과 2차원 모델의 모드형상은 유사한 형상을 보였다. 또한, 3차원 모델과 2차원 모델사이의 모드진동수는 25%에서 36%의 차이를 보였다.

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Correlation between Sustain Electrode Shape and Luminous Efficiency of ac-PDP with Waffle-type Barrier ribs

  • Park, Jung-Tae;Kim, Dong-Hyun;Sun, Jong-Ho;Yoo, Choong-Hee;Park, Chung-Hoo;Cho, Jung-Soo
    • Journal of KIEE
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    • 제11권1호
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    • pp.46-50
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    • 2001
  • In order to improve the luminous efficiency in ac PDP(Plasma Display Panel), we have suggested the new structures of sustain electrodes with waffle-type barrier ribs and the discharge current for a given pulse voltage has been decreased by eliminating the electrode area which has nothing to do with visible light emission area compared with conventional structure. As a result, the luminous efficiency was improved about 30% compared with the conventional structure.

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TECHNOLOGIES FOR REDUCING POWER CONSUMPTION OF PDPS IN PIONEER

  • Uchidoi, Masataka
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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    • pp.159-163
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    • 2004
  • We have introduced fourth generation PDPs last year. The performance of these PDPs is the highest level among TV displays. At the same time the power consumption of them has reached to the lowest level among FPDs (Flat Panel Displays). High panel luminous efficacy and low address power are necessary for the reduction of total power consumption. Following technologies have been developed and applied to the fourth generation PDPs. High panel luminous efficacy: T-shape electrode, waffle rib structure, high Xe content gas Low address power; CLEAR driving method, etc.

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타월용 시판소재의 촉감과 역학적 특성 (Tactility and Mechanical Properties of Marketing Towel)

  • 정하경;김선경;조효숙;김주용
    • 대한가정학회지
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    • 제44권10호
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    • pp.57-66
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    • 2006
  • The purpose of this study was to evaluate the relationship between the tactile sensation and mechanical properties of towel. Six kinds of towels with different surface structure and fiber composition were used for this study. To evaluate the tactility of towel, 36 adjectives were collected and then 11 adjectives were selected. The subjective evaluation was examined by one to one comparative method and by blind test for estimating the only the sense of touch of the towels. Kawabata's Evaluation system for fabrics was used to measure the mechanical properties which are tensile, bending, shear, compression, surface, weight, and thickness of six towels. The results are as follows; First, surface structure of the towels had an effect on estimation the sense of touch. Pile surface was evaluated thicker, compacter, more cushiony, and more elastic. Waffle surface was evaluated knottier and rougher, and microfiber suede surface was evaluated softer and denser. Second, the highest value of the mechanical properties measured were G, 2HG, B, and SMD of 100% cotton 100% pile, WC, T, and W of elban loop pile, WT, 2HB, and LC of 100% cotton cut pile, RT and MIU of microfiber suede, and RC of microfiber waffle. Third, the 11 adjectives were correlated with more than one mechanical property. 'Knotty' and 'rough' were correlated with MMD and SMD, 'soft' were correlated with B, 2HB, MMD, and SMD. 'Thick', 'heavy', 'compact', and 'elastic' were correlated with WC, T, and W, 'cushiony' was correlated with WC. 'Stiff' was correlated with B and 2HB, 'dry out' was correlated with RT, WC, MIU, and T. 'Dense' was correlated with RT and SMD.

단열복합 구조에 따른 지붕일체형 태양전지모듈의 성능 분석 (Analysis of Roof Integrated Photovoltaic Module's Performance with Insulation Hybrid Structure Layer)

  • 강기환;김현일;박경은;유권종;이소미
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2007년도 제38회 하계학술대회
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    • pp.1220-1221
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    • 2007
  • Building-integrated photovoltaic(BIPV) perform traditional architectural function of walls and roof while also generating electricity. But most of the absorbed solar energy appears passively as heat, raising the temperature of cells and reducing the efficiency with which the active part is converted into electricity. Therefore this paper presents the comparison of electrical, architectural and thermal performance of roof integrated photovoltaic(PV) modules, which is composed of different hybrid structure layer such as urethane form, waffle stud etc.

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항노화 패션을 위한 여성 요실금 팬티 연구 (A Study of Women's Incontinence Panties with Anti-aging Effect)

  • 구미란
    • 한국의상디자인학회지
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    • 제18권1호
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    • pp.51-60
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    • 2016
  • This study aims to contribute to development of women's incontinence panties with anti-aging effect meeting customers' requirements by examining types, sorts, sizes and specifications of women's incontinence panties currently sold in the market. The results of analysis of a total of 22 commercial products are as follows. 1. Among the samples, 21 incontinence panties were slip on type like regular underwear; only 1 was pad insertion type. With respect to the length of side seam, 17 (77.3%) incontinence panties were above 14 cm which is classified as maxi; the rest of them (5, 22.7%) were 7~11 cm which is classified as middy. 2. With respect to size, the percentage of Size 3 was 40.9% showing the largest, followed by Size 4 (31.8%), Size 2 (18.2%), Size 5 (9.1%). To produce the incontinence panties considering various ages and body shapes, it is recommended to select above Size 4 as a minimum. 3. With respect to materials of the incontinence panties, natural fibers such as cotton or rayon were mostly used and a polyurethane, nylon or polyester was mixed to enhance the wearing sensation and stretchability of the panties. Finally, for structure of the crotch area, single knit was the largest (9, 40.9%), terry weave 7 (31.8%), sofe pile weave 4 (18.2%), and waffle weave or diamond weave 2.

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교차형 와이드 거더를 이용한 아파트구조의 수치해석적 연구 (A Numerical Study on the Apartment Structure Using Crossed Wide Girder)

  • 박정현
    • 한국산학기술학회논문지
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    • 제8권5호
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    • pp.1186-1191
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    • 2007
  • 본 연구는 교차형 와이드 거더를 이용한 건축구조로 최소한의 슬래브 두께로 가능한 최장의 스팬을 확보할 수 있도록 함으로써, 층고를 높이지 않으면서 실내 공간에 자유롭고 다양한 변화를 가져올 수 있도록 하는 것이다. 즉, 본 연구는 교차형 와이드 거더를 응력분포에 따라 일정 간격으로 연속 배치함으로써, 낮은 층고에서 해당 경계 공간을 무주 공간으로 형성시킬 수 있도록 하는 것이다 본 연구의 수치적 타당성을 검토하기 위하여 3차원 횡력 설계가 가능한 프로그램인 Midas Gen을 이용하여 기존의 벽체 시스템과 교차형 Wide Girder에 의한 연성골조 시스템을 해석한 결과, 구조적으로 횡변위 및 층간변위와 바닥의 처짐 등이 기존의 벽체시스템과 비교하여 크게 불리하지 않으며, 전체적인 콘크리트 물량이 기존 벽체시스템과 비슷하며 건축적인 가변성을 확보하는데 큰 장점이 있는 것으로 나타났다.

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