• 한국작물학회:학술대회논문집
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• 한국작물학회 1996년도 추계 학술대회지
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• pp.18-19
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• 1996

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 D
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• pp.2249-2251
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• 2001

This paper proposes that it minimizes interference between link at high speed trajectory tracking of 2-degree parallel link manipulator and QFT(Quantitative Feedback Theory) controller which robust structure uncertainty and disturbance of plant. And using ICD(Individual Channel Design), it separates two channel from multivariable system, parallel link manipulator and designs robust controller with applying MISO QFT to each channel. Finally, we make sure of robustness and excellence of QFT controller through simulation and experiment.

• 한국기계가공학회지
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• 제3권4호
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• pp.37-42
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• 2004

End-milling have been widely used in aircraft, automobile part and moulding industry. However, various working factors such as spindle speed, feed rate and depth of cut in end-milling have an effect on spindle vibration. There it is demanded the quantitative analysis of spindle vibration in order to get the optimum surface roughness. This study was carried out to analyze an influence of working factors on spindle vibration by design of Experiment. The results are shown that mathematical model of regression equation for an influence of working factors on vibration acceleration of spindle in end-milling by regression analysis is presented.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1996년도 추계 학술대회지
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• pp.122-123
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• 1996

• 한국작물학회지
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• 제48권1호
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• pp.56-64
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• 2003

If a quantitative trait loci (QTL) marker identified in a population is applicable to different populations (marker universality), this will not only reduce the labor and cost in marker assisted selection (MAS), but accelerate the application of molecular markers to real breeding programs. Present study aims to evaluate the defined QTL related markers from a population to a different breeding population for the MAS. Four rice breeding populations were subjected to seventy-five simple sequence repeat (SSR) markers which were already identified for their polymorphism information content (PIC) in the parents of the crossings. Among them, eight markers were evaluated for their correlation between presence of marker alleles and phenotypic expression in breeding populations. A reasonable level of polymorphism for the mapped markers originated from any sources of rice accessions was observed between crosses of any sources (marker repeatability). However, correlation between presence of markers and expression of the traits in rice breeding populations was not significant except for minor portion of traits and markers examined (failure of marker universality). In the present study, various strategies were discussed to develop new markers with universality of breeding application.

• 한국과학교육학회지
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• 제42권2호
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• pp.201-214
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• 2022

본 연구에서는 학생들의 자유 탐구 활동에서 나타나는 실험 모델링의 특징을 탐색하였다. 연구는 '학교과학탐구'라는 주제로 이루어진 3년의 연구 과제 수행에서 기수집한 자료를 '실험 모델' 관점에서 재해석한 것이다. 4명의 학생들로 구성된 1개 소집단이 7회에 걸쳐 수행한 탐구 활동을 녹화하고 녹음한 파일을 주된 자료원으로 하였으며, 녹화 및 전사본을 해석적인 방법에 따라 분석하였다. 문제 상황으로부터 출발하여 이를 해결하고 마무리되는 과정을 포괄하는 것을 모델링 단위로 볼 때, 학생들의 활동은 3개 실험 모델링 단위로 구분되었다. 연구의 결과는 각 모델링 단위에서 분산인지체계로서 실험 모델링의 역동적 과정과 특징을 조명하고 교육적 의미를 논하는 것을 포괄한다. 구체적으로는 첫째, 학생과 실험도구 그리고 그들 사이의 상호작용으로 나타나는 원시적 형태의 계산은 실험 모델링을 구성하는 분산인지체계의 중요한 요소로 드러났다. 둘째, 초기에 학생이 도구에 익숙해지는 비언어적인 활동이 이루어졌으며, 그 활동이 충분히 이루어졌을 때 언어적인 양적 기호가 창출되었다. 창출된 양적 기호는 이후 활동에서 참고할 수 있는 데이터와 자신감의 원천이 되었다. 셋째, 도구의 전용화가 발생하였으며, 변인통제와 같이 기존의 과학 탐구에서 중요하게 다룬 요소들이 나타났다. 연구의 결과는 기존의 과학교육에서 주목받지 못했던 실험 모델링의 특징을 학생 활동을 통해 펼쳐 보임으로써, 설명 모델 중심으로 이루어져왔던 과학교육 연구와 교육에 새로운 시사점을 제공한다.

• Mass Spectrometry Letters
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• 제13권4호
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• pp.133-138
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• 2022

Taurine is a type of sulfur-containing amino acid having a sulfate functional group, that is biosynthesized from cysteine. It is mainly distributed in high concentrations in animal tissues and is known to have various effects such as osmotic pressure control, calcium control, anti-inflammatory, antioxidant, and hepatocellular protection. Also, taurine deficiency causes a variety of symptoms, including visual impairment. In particular, in the case of cats, taurine is not biosynthesized and must be supplied through food, so it is classified as an essential amino acid. In this study, an analysis method using mass spectrometry was developed instead of the commonly used derivatization method to quickly, environmentally, and precisely analyze taurine in various animal feeds. The developed analytical method showed good linearity (R² > 0.99), accuracy (81.97-105.78%), and precision (0.07-12.37%). In addition, the developed method was further verified through quantitative comparison with the derivatization method. This developed method was used in the determination of taurine in 20 animal feed samples obtained from South Korea. The levels of taurine found ranged from 81.53 to 6,743.53 mg/kg. The developed analysis method will be used for the detection and quantification of taurine in domestic feed.

• International Journal of Industrial Entomology and Biomaterials
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• 제2권1호
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• pp.79-81
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• 2001

A study was conducted to establish the degree of genetic divergence between different hybrid forms and rearing conditions through estimation of the minimum number of genes (allelic pairs) differentiating parents in terms of specific quantitative traits. It was established that the minimum gene numbers differentiating parental lines in the inheritance of cocoon was 1, of cocoon shell weight- between 1 and 2, and of silk filament length- between 2 and 3. The variability in the specific genetic parameter could be explained by the reliability of the statistical-and-genetic method used and the expression of genes affecting the formation of each of the characters tested. Gene expression, in its turns is conditioned both by the gene interaction within the genotypes and the different genotype response to environmental change. To go deep in the problem, experiments should be conducted under strictly controlled conditions, reducing the mathematical-and-genetic analysis to a physiological levels and hence to analyse the genetic nature of the specific quantitative character formation and its genetic control.

• Asian-Australasian Journal of Animal Sciences
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• 제24권10호
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• pp.1329-1334
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• 2011

The Hinai-dori is a breed of chicken native to Akita Prefecture, Japan. An $F_2$ resource population produced by crossing low- and high-growth lines of the Hinai-dori breed was analyzed to detect quantitative trait loci (QTL) for growth traits. Highly significant QTLs for body weight at 10 and 14 weeks of age and average daily gain between 4 and 10 weeks and between 10 and 14 weeks of age were accordingly mapped in a common region between ADL0198 and ABR0287 on chromosome 1 and between MCW0240 and ABR0622 on chromosome 4, respectively. A significant QTL for body weight at 4 weeks of age and a significant QTL for average daily gain between 0 and 4 weeks of age were mapped for the first time to the same region flanking ABR0204 and ABR0284 on chromosome 1. These QTLs are good candidates for application in the development of marker-assisted selection strategies for increasing growth efficiencies in the Hinai-dori breed and native breeds of chickens in Asia.

• 대한산업공학회지
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• 제43권3호
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• pp.176-183
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• 2017

In recent years, studies about multitasking becomes more important. During multitasking, operators can feel frustration when they are interrupted during the task and frustration can affect operator's emotional state and performance. However there is no research on measuring the frustration quantitatively in multitasking environment. In this paper, we suggested quantitative measurement of frustration during multitasking. In order to measure the frustration, we made a mathematical representation with emotional decay model and the initial intensity of frustration based on cognitive closure theory. The amount of initial intensity could be represented as the ratio of actual remaining time to expected remaining time. By the experiment, we measured the frustration during the experiment and compared this values with values of frustration dimension of NASA-TLX. Finally we got the linear regression model with a good accuracy ($R^2=0.986$). This study contributes to measuring the emotion quantitatively by the relation of expected and actual remaining time in multitasking environment.