• Journal of Computational Design and Engineering
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• 제1권3호
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• pp.202-212
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• 2014

To survive in the current shipbuilding industry, it is of vital importance for shipyards to have the ship components' accuracy evaluated efficiently during most of the manufacturing steps. Evaluating components' accuracy by comparing each component's point cloud data scanned by laser scanners and the ship's design data formatted in CAD cannot be processed efficiently when (1) extract components from point cloud data include irregular obstacles endogenously, or when (2) registration of the two data sets have no clear direction setting. This paper presents reformative point cloud data processing methods to solve these problems. K-d tree construction of the point cloud data fastens a neighbor searching of each point. Region growing method performed on the neighbor points of the seed point extracts the continuous part of the component, while curved surface fitting and B-spline curved line fitting at the edge of the continuous part recognize the neighbor domains of the same component divided by obstacles' shadows. The ICP (Iterative Closest Point) algorithm conducts a registration of the two sets of data after the proper registration's direction is decided by principal component analysis. By experiments conducted at the shipyard, 200 curved shell plates are extracted from the scanned point cloud data, and registrations are conducted between them and the designed CAD data using the proposed methods for an accuracy evaluation. Results show that the methods proposed in this paper support the accuracy evaluation targeted point cloud data processing efficiently in practice.

• Asian-Australasian Journal of Animal Sciences
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• 제14권3호
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• pp.326-332
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• 2001

On a urea-molasses-straw (3:15:82; UMS) based diet effect of graded levels of cottonseed cake (CSC) supplementation on the performance of native (Bos indicus) bulls has been studied for 167 days. Eighteen growing bulls of $129{\pm}13.4kg$ weight and about 14 months old were randomly allocated to three dietary treatments designed in a completely randomized design, having six animals in each treatment. Three dietary treatments were 0, 0.5 and 1.0 kg CSC per head/d. In addition, each animal also received ad lib. UMS, 4 kg Napier (Pennisetum purpureum) grass, 500 g of each of rice and wheat bran and 60 g mineral mix daily. For unit increase in CSC, total DM intake was increased by $1g/kg\;W^{0.75}/d$ but the straw DM intake decreased by $0.54g/kg\;W^{0.75}/d$. Whole gut digestibility of DM and OM was not effected but N and ADF digestibility increased with incremental increase in dietary CSC. For unit (1kg) increase in dietary CSC intake N and ADF digestibility increased by 10 (${\pm}1.155$) and 3 (${\pm}1.732$) unit respectively. Microbial N yield for the 0, 0.5 and 1.0 kg CSC were 5.63, 5.28 and 5.16 g/kg OM apparently fermented in the rumen respectively. For each gram increase in CSC, N intake and N balance increased by 0.626 (${\pm}0.015$) and 0.625 (${\pm}0.0814$) mg/kg $W^{0.75}/d$. High apparent N balance was contrasted with low live weight gain, e.g., for 1 kg increase in CSC supplementation, live weight gain increased by only 0.077 (${\pm}0.00288$) kg/d ($r^{2}=0.99$; p<0.01). The conversion efficiency was 12.98 kg CSC per kg of live weight gain. It was concluded that unless the protein is being protected from the rumen degradation, addition of CSC to UMS diet would have little nutritional or economic advantages.

• 한국작물학회지
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• 제30권4호
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• pp.419-426
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• 1985

동부의 파종적기와 한계기를 구명함과 동시에 Growing Degree Days(GDD)의 이용 가능성을 검토하였던 바 시험결과를 요약하면 다음과 같다. 1. 파종기 지연에 따라 파종후 개화 및 성숙시까지의 일수가 단축되었으며 8월 14일 이후 파종은 개화하지 못했다. 2. 파종이 늦어질 수록 생육초기의 생장속도가 빨라졌고, 중원재래가 그 경향이 뚜렷하였다. 3. 5월 1일부터 7월 15일까지의 파종에서는 주경장, 주경절수, 분지수 및 경직경의 차가 없었으나 7월 30일 이후 파종부터는 파종지연 정도에 따라 급격히 감소했다. 4. 주경화경수, 분지화경수, 화경당착협수, 개체당착협수 및 100입중과 수량간에는 고도의 정의 상관관계가 있었다. 5. VITA#5는 중원재래에 비해 화경수, 개체당착협수가 않고, 100입중도 무거워 다수성이며, 두품종 공히 조파할 수록 증수의 경향이었고, 파종 한계기는 VITA#5가 6월 30일, 중원재래가 6월 15일 이었다. 6. 개화·착협 당시의 생육조건이 불량하면 협당입수가 감소된다. 7. GDD에 의한 개화까지의 표시방법은 일반 날자로 표시하는 것보다 변이계수가 작아 동부에도 이용가능성을 보였다.

• Journal of Plant Biotechnology
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• 제34권3호
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• pp.189-195
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• 2007

Helicteres isora is medicinally important plant effective against asthma, diabetes, hypolipidemia, HIV, besides a good source of diosgenin. Seed dormancy and low rate of natural fruit production make this plant a perfect candidate for developing an in vitro method useful for its clonal propagation and further biotechnological developments. This is the first report on in vitro production of this plant. Nodal explants obtained from aseptically germinated seedlings were cultured on MS medium (Murashige and Skoog 1962) fortified with indole-3-acetic acid (IAA) ($0.57-22.83\;{\mu}M$), indole-3-butyric acid (IBA) ($0.41-16.58\;{\mu}M$), 6-benzylaminopurine (BA) ($0.44-17.75\;{\mu}M$) and kinetin (Kin) ($0.46-13.94\;{\mu}M$) either singly or in combinations of IAA + BA, IAA + Kin and BA + Kin. Combinations of cytokinins (BA and Kin) were most suitable for multiple shoot induction and $13.94\;{\mu}M\;Kin\;+\;13.31\;{\mu}M\;BA$ was optimum (79% frequency) associated with high number of microshoots (7.1 shoots per explant) after 20 days of culture. Maximum shoot elongation and proliferation (10 shoots per explant with 4.8 cm average height) was achieved on MS media containing $2.32\;{\mu}M\;Kin\;+\;2.22\;{\mu}M\;BA\;+\;2.85\;{\mu}M\;IAA$. High rooting frequency (70%) was achieved on MS medium (1/2 basal strength) fortified with $4.14\;{\mu}M$ IBA, while activated charcoal showed inhibitory effects on rooting. Hardening was done with 76% survival rate and these plants were growing without any visual defects and morphologically mimicking the naturally growing plants.

• Journal of Microbiology and Biotechnology
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• 제17권11호
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• pp.1868-1874
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• 2007

We have developed a robotic system for an automated parallel cell cultivation process that enables screening of induction parameters for the soluble expression of recombinant protein. The system is designed for parallelized and simultaneous cultivation of up to 24 different types of cells or a single type of cell at 24 different conditions. Twenty-four culture vessels of about 200 ml are arranged in four columns${\times}$six rows. The system is equipped with four independent thermostated waterbaths, each of which accommodates six culture vessels. A two-channel liquid handler is attached in order to distribute medium from the reservoir to the culture vessels, to transfer seed or other reagents, and to take an aliquot from the growing cells. Cells in each vessel are agitated and aerated by sparging filtered air. We tested the system by growing Escherichia coli BL21(DE3) cells harboring a plasmid for a model protein, and used it in optimizing protein expression conditions by varying the induction temperature and the inducer concentration. The results revealed the usefulness of our custom-made cell cultivation robot in screening optimal conditions for the expression of soluble proteins.

• 대한전자공학회논문지SD
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• 제37권3호
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• pp.14-19
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• 2000

Seed crystal 로 bare (0001) 사파이어 기판을 사용하여 hydride vapor Phase epitaxy (HVPE)법을 이용하여 free-standing GaN 단결정기판을 성장시켰다. 일정한 두께의 GaN막을 성장한 후 사파이어 기판을 mechanical polishing 작업으로 제거하여 두께 200 ㎛, 10×10 ㎛ 크기의 free-standing GaN 기판을 얻을 수 있었으며, 성장 전 GaCl 전처리를 수행함으로써 crack이 없는 기판을 제작할 수 있었다. 이렇게 제작된 free-standing GaN 기판의 특성을 SiO/sub 2/ patterned sapphire위에 LEO (Lateral Epitaxial Overgrowth) 방법으로 성장된GaN박막과 double crystal x-ray diffraction (DC-XRD), cathode-luminescence (CL) 및 photoluminescence (PL) 방법으로 특성을 비교하였다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.236-236
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• 2017

Low soil pH causes from $H^+$ rhizotoxicity results in nutrients unavailability in the growing media, inhibits plant growth, development and reduces crop yields. The present study was carried out to reveal morpholophysiological and biochemical responses of wheat (Triticum aestivum L.) to acidity stress. Four wheat varieties viz. BARI Wheat-21, BARI Wheat-25, BARI Wheat-26 and BARI Wheat-30 were used in the study. Eight-day-old seedlings were exposed to different pH levels (3.5, 4.5, 5.5 and 6.5) of growing media. Acidity stress at any level reduced biomass, water, and chlorophyll contents in all the varieties; whereas BARI Wheat-26 showed the least damage. $H^+$ rhizotoxicity also caused oxidative stress through excess production of reactive oxygen species and methylglyoxal which increase lipid peroxidation in all the varieties but the lowest oxidative damage was observed in BARI Wheat-26 due to better performance of the antioxidant defense and glyoxalase systems. Considering the growth, physiological and biochemical attributes BARI Wheat-26 may be considered as acidity stress tolerant, among the variety examined.

• 한국잠사곤충학회지
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• 제44권1호
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• pp.9-12
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• 2002

한반도에 자생하는 돌뽕나무(Morus tiliaefolia)의 임성과 재배학적 특성은 다음과 같다. 1. 종자형성률은 46∼80%이며 종자의 발아율은 19∼28%에 불과하다 2. 개화최성기(1994년)는 4월 28일∼5월 3일로서 산뽕나무보다는 늦고 개량뽕보다 빠르다 3. 춘기 동아의 탈포기는 4월 21일∼24일로서 산뽕나무와 개량뽕보다 늦다. 4. 잎은 대형으로 엽형지수 1.05의 폭광성을 나타내며 잎두께는 산뽕나무보다 두껍다. 5.성숙엽의 화학성분은 가용성 무질소물과 조회분이 많고 조단백질, 조지방, 조섬유가 적다. 6. 낮추베기때의 자세는 대부분 전개성이며 가지는 조장형이고 절간장이 길다 7. 추위견딜성과 뽕나무 동고병에 약하다.

• Asian-Australasian Journal of Animal Sciences
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• 제28권4호
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• pp.485-493
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• 2015

This study evaluated the in situ ruminal degradability, and subsequent small intestinal digestibility (SID) of dry matter, crude protein (CP), and amino acids (AA) of cottonseed meal (CSM), sunflower seed meal (SFSM) and distillers dried grains with solubles (DDGS) by using the modified three-step in vitro procedure. The ruminal degradability and subsequent SID of AA in rumen-undegradable protein (RUP-AA) varied among three protein supplements. The result show that the effective degradability of DM for SFSM, CSM, and DDGS was 60.8%, 56.4%, and 41.0% and their ruminal fermentable organic matter was 60.0%, 55.9%, and 39.9%, respectively. The ruminal degradable protein (RDP) content in CP for SFSM, CSM, and DDGS was 68.3%, 39.0%, and 32.9%, respectively, at the ruminal solid passage rate of 1.84%/h. The SFSM is a good source of RDP for rumen micro-organisms; however, the SID of RUP of SFSM was lower. The DDGS and CSM are good sources of RUP for lambs to digest in the small intestine to complement ruminal microbial AA of growing lambs. Individual RUP-AA from each protein source was selectively removed by the rumen microorganisms, especially for Trp, Arg, His, and Lys (p<0.01). The SID of individual RUP-AA was different within specific RUP origin (p<0.01). Limiting amino acid was Leu for RUP of CSM and Lys for both RUP of SFSM and DDGS, respectively. Therefore, different protein supplements with specific limitations should be selected and combined carefully in growing lambs ration to optimize AA balance.

• 식물병연구
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• 제19권3호
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• pp.233-236
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• 2013

본 실험은 강원도 마늘 주산지인 삼척시와 정선군의 바이러스 감염 정도를 조사하기 위해 수행되었다. 지역별 100개 시료의 검정을 위해 4종 primer(GLV, LYSV, GCLV, OYDV)를 이용한 RT-PCR 검정을 하였다. 진단 결과 삼척시와 정선군 두 지역에서 바이러스 감염율이 GLV 95%, LYSV 95%, GCLV 92%, OYDV 33%로 조사되었다. 본 조사에 사용된 마늘 검정 시료는 적어도 한 개 이상의 바이러스에 감염되어 있는 것으로 확인되었다. GLV, LYSV, GCLV 3종류의 바이러스 복합감염과 GLV, LYSV, GCLV, OYDV 4종류 바이러스의 복합감염이 각 60%와 25%로 나타났다. GLV, LYSV, GCLV는 두 지역 모두에서 고르게 나타나는 반면 OYDV는 삼척시 보다는 정선군에서 많이 감염되어 있는 것으로 조사되었다. 현재 전국 및 강원도 마늘 포장에서 바이러스 감염은 매우 심각하다. 따라서 마늘의 바이러스 무병종구 및 종구갱신 기술개발이 필요하다.