• 제목/요약/키워드: Strip-type

검색결과 359건 처리시간 0.029초

AUTOMATIC ADJUSTMENT OF DISCREPANCIES BETWEEN LIDAR DATA STRIPS - USING THE CONTOUR TREE AND ITERATIVE CLOSEST POINT ALGORITHM

  • Lee, Jae-Bin;Han, Dong-Yeob;Yu, Ki-Yun;Kim, Yong-Il
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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    • pp.500-503
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    • 2006
  • To adjust the discrepancy between Light Detection and Ranging (LIDAR) strips, previous researches generally have been conducted using conjugate features, which are called feature-based approaches. However, irrespective of the type of features used, the adjustment process relies upon the existence of suitable conjugate features within the overlapping area and the ability of employed methods to detect and extract the features. These limitations make the process complex and sometimes limit the applicability of developed methodologies because of a lack of suitable features in overlapping areas. To address these drawbacks, this paper presents a methodology using area-based algorithms. This approach is based on the scheme that discrepancies make complex the local height variations of LIDAR data whithin overlapping area. This scheme can be helpful to determine an appropriate transformation for adjustment in the way that minimizes the geographical complexity. During the process, the contour tree (CT) was used to represent the geological characteristics of LIDAR points in overlapping area and the Iterative Closest Points (ICP) algorithm was applied to automatically determine parameters of transformation. After transformation, discrepancies were measured again and the results were evaluated statistically. This research provides a robust methodology without restrictions involved in methods that employ conjugate features. Our method also makes the overall adjustment process generally applicable and automated.

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선저부 공기공동을 이용한 실선선형의 저항성능 개선을 위한 선저형상 개량연구 (On the Suitable Shape of Bottom for the Application of Air Cavity on Hull Bottom to the Practical Hull Form)

  • 고석천;김효철
    • 대한조선학회논문집
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    • 제36권3호
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    • pp.1-7
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    • 1999
  • 본 논문에서는 충주호에서 유람선으로 사용되고 있는 광폭천흘수형 선박을 대상으로 선정하고, 공기를 공급하여 선저에 공동을 형성시켜 마찰저항을 감소시킬 수 있도록 선박의 선저형상을 개량하였다. 2차원 공동문제로 이상화하여 선저에 부착되는 공동을 이론적 방법으로 수치해석하여 공기공동의 형상과 내부압력을 추정하였고 공동현상을 지배하는 무차원수를 살펴보았다. 예인수조에서 모형선실험을 시행하고 단의 높이변화, 선측의 공기유출막이벽 등에 의한 공기공동의 형성과 저항감소효과를 조사하였다. 또한 투명한 아크릴로 제작된 선저부를 통해, 선저에 부착되는 공기공동의 발달과정을 관측하였다. 이러한 연구를 통하여, 실선선형의 선저부 형상을 적절히 개량하고 공기를 공급함으로써 설계속도 부근에서 원래선형의 전저항의 25%정도를 줄일 수 있음을 모형선에서 확인하였다.

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다중 도파기를 사용한 직렬 급전 다이폴 쌍 안테나 설계 (Design of Series-fed Dipole Pair Antenna Using Multiple Directors)

  • 여준호;박진택;이종익
    • 한국정보통신학회:학술대회논문집
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    • 한국정보통신학회 2015년도 춘계학술대회
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    • pp.471-472
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    • 2015
  • 본 논문에서는 다중 도파기를 사용하여 직렬 급전 다이폴 쌍 안테나의 이득을 향상시키는 설계방법에 대하여 연구하였다. 직렬 급전 다이폴 쌍 안테나의 두 번째 다이폴 위에 스트립 형태의 도파기가 위치하며 두 번째 다이폴의 길이와 도파기의 갯수에 따른 입력 전압 정재파비(VSWR; voltage standing wave) 대역폭과 이득의 변화를 분석하였다. 1.7-2.7 GHz 대역에서 8 dBi 이상의 이득을 갖도록 최적화하였으며, 3개의 도파기를 가진다. 최적화된 안테나는 FR4 기판 상에 $86.2mm{\times}152.3mm$ 크기로 설계되었으며, VSWR < 2인 대역이 1.67-2.79 GHz이고 이득이 8 dBi 이상인 대역은 1.69-2.72 GHz이다.

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Overproduction of 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) confers resistance to the herbicide glyphosate in transgenic rice

  • Lee, Soo-In;Kim, Hyun-Uk;Shin, Dong-Jin;Kim, Jin-A;Hong, Joon-Ki;Kim, Young-Mi;Lee, Yeon-Hee;Koo, Bon-Sung;Kwon, Sun-Jong;Suh, Seok-Chul
    • Journal of Plant Biotechnology
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    • 제38권4호
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    • pp.272-277
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    • 2011
  • Plants expressing Agrobacterium sp. strain CP4 5-enolpyruvylshikimate-3-phosphate synthase (CP4 EPSPS) are known to be resistant to glyphosate, a potent herbicide that inhibits the activity of the endogenous plant EPSPS. In order to develop herbicide-resistant rice, we prepared transgenic rice plants with CP4 EPSPS gene under the control of CaMV 35S promoter for over-expression. A recombinant plasmid was transformed into rice via Agrobacterium-mediated transformation. A large number of transgenic rice plants were obtained with glyphosate and most of the transformants showed fertile. The integration and expression of CP4 EPSPS gene from regenerated plants was analyzed by Southern and northern blot analysis. The transgenic rice plants had CP4 EPSPS enzyme activity levels more than 15-fold higher than the wild-type plants. EPSPS enzyme activity of transgenic rice plants was also identified by strip-test method. Field trial of transgenic rice plants further confirmed that they can be selectively survived at 100% by spay of glyphosate (Roundup$^{(R)}$) at a regular dose used for conventional rice weed control.

Effect of line and floor type on growth performance and feather characterization during the growth period of White Roman geese

  • Lin, Min Jung;Chang, Shen Chang;Chen, Tzu Jou;Lin, Wei Chih;Peng, Shao Yu;Lee, Tzu Tai
    • Asian-Australasian Journal of Animal Sciences
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    • 제33권9호
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    • pp.1455-1462
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    • 2020
  • Objective: The purpose of this study was to investigate whether goose growth and feather characteristics are influenced by their line and feeding surroundings, inclusive of floor materials and types, since there are no reports regarding these factors. Methods: The 240 White Roman geese which were hatched and sex identified came from 3 commercial goose farms. They were randomly distributed to 24 pens depending on a completely random design. The study continued for 13 weeks and included 3 lines of commercial geese and 2 floor types (cement strip floor [CSF] or cement floor [CF]). Results: The day one gosling weight from A farm was lower than other two farms (96 g vs 107 and 115 g; p<0.001). Afterwards, the body weight, back length, keel length, chest girth and main wing feather length among 3 farms showed no significance difference prior to 12 weeks. The CF group showed heavier body weight, shorter back length, longer keel length, shorter chest girth and shorter main wing feather length than the CSF group prior to 12 weeks. The down weight in the CF was heavier than the CSF group (57.1 g vs 41.8 g; p<0.01) prior to 13 weeks. Conclusion: The body weight showed the positive relations for dry feather weight (r = 0.59), down weight (r = 0.69), percent of the down weight of live body weight prior to 13 weeks (r = 0.61).

The Differences in Chemical Composition, Physical Quality Traits and Nutritional Values of Horse Meat as Affected by Various Retail Cut Types

  • Seong, Pil Nam;Park, Kyoung Mi;Kang, Geun Ho;Cho, Soo Hyun;Park, Beom Young;Chae, Hyun Seok;Ba, Hoa Van
    • Asian-Australasian Journal of Animal Sciences
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    • 제29권1호
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    • pp.89-99
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    • 2016
  • The effects of retail cut type on chemical, quality and nutritional characteristics of horse meat were studied. Jeju female breed horses (n = 9) at 32-mo-old were slaughtered and the carcasses at 24 h post-mortem were fabricated into 10 retail cuts including: tender-loin, loin, strip-loin, shoulder-chuck-roll, shoulder-clod, top-round, outside-round, brisket, short-plate-brisket, and shank. The results revealed that all of parameters (chemical, meat quality and nutritional composition) examined significantly (p<0.05) differed between the cuts. The chemical composition range (minimum to maximum) of cuts was found as such: moisture 65.06% to 71.69%; protein 19.07% to 21.28%; collagen 1.40% to 2.45%; fat 2.56% to 12.14% and cholesterol 55.76 to 79.50 mg/100 g. Shoulder-chuck-roll had the highest pH and water-holding capacity, while top-round had the highest cooking loss. Shear force ranged between the cuts from $2.80kg/cm^2$ to $4.98kg/cm^2$. The Cu, Fe, and Zn contents ranged between the cuts from 1.52 mg/kg to 2.75 mg/kg, 21.25 mg/kg to 30.85 mg/kg, and 16.51 mg/kg to 40.42 mg/kg, respectively. Additionally, most of the cuts studied showed favorable polyunsaturated fatty acid/saturated fatty acid, n-3/n-6 and essential amino acid/non-essential amino acid ratios.

2:1 임피던스 대역폭 비를 가지는 광대역 quasi-Yagi 안테나 설계 (Design of a Broadband Quasi-Yagi Antenna with a 2:1 Impedance Bandwidth Ratio)

  • 이종익;여준호;박진택
    • 한국항행학회논문지
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    • 제16권5호
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    • pp.760-765
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    • 2012
  • 본 논문에서는 임피던스 대역폭 비가 2 : 1 이상의 광대역 특성을 갖고 이득이 최소 3.5 dBi 이상인 quasi-Yagi 안테나(QYA) 설계방법에 대해 연구하였다. QYA는 코프래너 스트립에 내장된 마이크로스트립으로 급전되며, 평면 다이폴과 그에 근접하는 도파기, 그리고 접지면 반사기 등 3 개의 소자로 구성된다. 폭이 넓은 직사각 패치 모양의 도파기를 스트립 다이폴 가까이 두어서 광대역 정합 특성을 구현하였다. 시뮬레이션을 통해 1.6-3.5 GHz (대역폭 비 2.2 : 1) 대역용으로 최적화된 3 소자 QYA를 FR4 기판 상에 $90mm{\times}90mm$ 크기로 제작하여 특성을 실험하였다. 실험결과, VSWR < 2 인 임피던스 대역은 1.56-3.74 GHz(대역폭 비 2.4 : 1), 피크이득은 4.2-6.3 dBi이고, 전후방비(FBR)는 13.6 dB 이상 이다.

복합재 유연보를 갖는 무베어링 로우터 시스템의 정지 비행시 공탄성 안정성 해석 (Aeroelastic Stability Analysis of Bearingless Rotors with Composite Flexbeam in Hover)

  • 임인규;최지훈;이인;한재흥
    • Composites Research
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    • 제17권3호
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    • pp.29-37
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    • 2004
  • 본 연구에서는 대변형 보이론을 이용하여 정지 비행 시 복합재 무베어링 로우터 시스템의 공력탄성학적 안정성 해석을 수행하였다. 무베어링 로우터 시스템은 유연보, 토오크 튜브, 피치 링크, 그리고 메인 블레이드로 구성된다. 유연보, 토오크 튜브, 그리고 메인 블레이드를 각각 플랩 굽힘, 리드-래그 굽힘, 비틀림 그리고 축 방향 변형의 탄성 운동을 하는 보로 가정하고, 1차원 보 요소로 모델링을 하였다. 또한, 유연보를 복합재료 적층판으로 구성된 비틀림에 유연한 직사각형 단면을 갖는 보로 모델링 하여, 1차원 보 해석에 필요한 유효 단면 상수를 얻었다. 외력으로는 2차원 준-정상 공기력 모델을 적용하였으며, 보의 유한 요소 지배방정식은 헤밀턴 원리(Hamilton's principle)를 이용하여 얻었다. 공력 탄성학적 안정성 해석을 수행하기 위하여 p-k 방법을 이용하였으며, 유연보의 적층각과 적층 순서에 따른 구조적 연성이 무베어링 로우터 시스템의 공란성 안정성에 미치는 영향을 알아보았다.

SOI 구조를 이용한 열전쌍열(Thermopile) 제작 (Fabrication of the thermopile using SOI structure)

  • 이영태
    • 센서학회지
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    • 제11권1호
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    • pp.1-8
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    • 2002
  • 온도 측정이 필요한 다양한 용도의 소자에 응용되고 있는 열전쌍열(thermopile) 제작에 SOI 구조를 응용하여, 특성을 개선하였다. 열전쌍열을 구성하는 저항체가 단결정 실리콘으로, 제벡 계수(seebeck coefficient)가 높은 재료일 뿐 아니라, 실리콘 저항체를 산화막을 이용하여 실리콘 기판과 절연 분리한 구조로 되어있어서, 기존의 이온주입 공정에 의해 불순물을 주입하는 방법으로 제작된 저항체에 비해서 두 접점(hot junction 및 cold junction) 사이의 열 전달을 극적으로 감소시킬 수 있어서 소자의 특성을 개선할 수 있었다. 열전쌍열은 p형 단결정 실리콘 저항체 17개 및 n형 17개를 직렬 연결로 구성했다. 저항체의 길이 $1600{\mu}m$, 폭 $40{\mu}m$, 두께 $1{\mu}m$으로 제작된 열전쌍열에 빛을 조사하여 소자 양단에 온도차를 발생시키고, 그 때 발생하는 기전력을 측정한 결과 130mV/K의 우수한 특성을 나타냈다.

The Analysis of Seminal Plasma Proteins by Two-Dimensional Polyacrylamide Gel Electrophoresis (2-DE) in Hanwoo (Korean Native Cattle)

  • Lee, Yong-Seung;Song, Eun-Ji;Yoo, Han-Jun;Park, Joung-Jun;Cheong, Hee-Tae;Yang, Boo-Keun;Park, Choon-Keun
    • 한국수정란이식학회지
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    • 제25권4호
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    • pp.281-286
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    • 2010
  • This study was to evaluate the protein profile of seminal plasma using 2-DE in Hanwoo. Seminal plasma was harvested from five mature Hanwoo, and seminal plasma protein was extracted by M-PER Mammalian Protein Extraction Reagent. Proteins were refined by clean-up kit and quantified by Bradford method until total protein was $300\;{\mu}l$. Immobilized pH gradient (IPG) strip was used 18 cm and 3~11 NL. SDS-PAGE was used 12% acrylamide gel. Each gels were visualized by comassie brilliant blue and silver staining. These spots were analyzed by MALDI-TOF MS and searched on NCBInr. The result, 20 proteins of 36 protein spots were searched through peptide sequencing on the NCBInr. 8 proteins profiled by 2-DE were proved through previous bovine studies and the name of each protein was albumin, nucleobindin, clusterin, TIMP-2, spermadhesin Z13, spermadhesin-1 and BSP proteins (BSP 30 kDa and BSP A1/A2). 12 new proteins were ATP synthase, protein MAK16 homolog, Transmembrane protein 214, E3 ubiquitin-protein ligase BRE1A, dual serine/threonine and tyrosine protein kinase, tissue factor pathway inhibitor 2, alpha-actinin-4, RUN domain-containing protein 3B, catenin alpha-1, protein-glutamine gamma-glutamyltransferase 2, plakophilin-1 and inter-alpha-trypsin inhibitor heavy chain H1 has not been previously described in the bovine seminal plasma study. These proteins may be contribute to define the type of proteins affecting fertility of male and improve the fertilizing ability of semen in Hanwoo.