• International Journal of Industrial Entomology and Biomaterials
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• 제18권2호
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• pp.69-75
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• 2009

Daba ecorace of Antheraea mylitta Drury (Lepidoptera: Saturniidae), the semi domesticated Indian tropical tasar silkworm being reared outdoor; the egg and silk yields are dependent of genotype environment interaction. The insufficient maintenance and multiplication of its P4 seed stock need a coherent as well as scientific strategy to safeguard breed potential, being commercially applied ecorace. The sort-out lines of P4 stock studied over five generations highlighting on commercial trait up gradation suits for a tropical crop season, revealed enhanced performance. The line with high pupal parents (T2) shown improved fecundity (12.9%) and the line with high shell parents (T3) recorded higher shell weight (40.0%) and silk ratio (24.1%). While, the line of high pupal female and high shell male (T4) reveal enhancement in fecundity (9.0%), egg hatching (14.1%), shell weight (50.0%), silk ratio (35.2%) and absolute silk yield (52.0%) indicating the need and role of varied basic seed stock lines. The approach could improve economically vital egg fecundity and cocoon shell weights besides balancing them in same line for commercial operation. The progressive show of lines (T1 to T4) along successive generations (G1 to G5), in spite of passing through seed crop (Jul-Aug) and commercial crop (Sep-Nov) seasons emphasize their compatibility. The study infers that the strategic plan of combining preferred parental phenotypes, methodical selection for desired commercial trait(s) through generations with best possible genotype environment interaction has enriched P4 stock with elevation in needy trait(s) besides assuring choice of suitable lines for seasons and regions and timely replenishment of basic seed of Daba ecorace.

• 한국가정과학회지
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• 제4권2호
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• pp.94-109
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• 2001

The purpose of this study was to explore dietary attitude among middle school students by sex. The subjects were collected from 211 boy students and 198 girl students in the city of Kunsan, Jeonbuk province. The mean age of the subjects was 13.7 years old. The average score of food habit was 4.61 $\pm$ 1.92. The average score of food habit of boy students was higher than the score of girl students. The correlations between the score of food habit and father's education level. family income, and nutritional supplements were positive. The correlation between the scores of the nutrition knowledge and father's education level was also positive. On the other hand the mother's occupation did not have any influence on the scores of food habits and the scores of the nutrition knowledge. As a staple food, cooked rice was preferred on boy and girl students at breakfast(82.7%) and supper(94.3%). The preference of snacks was fruit and fruit juice. The reason of skipping breakfast was the lack of time and no appetite, and skipping lunch was due to no appetite. Lastly the main reason of skipping supper was playing computer on boys. on the other hand no appetite and weight control on girls. In order to improve the nutritional status of the middle school students, they must establish good food habits by eating three regular meals per day and balancing their diet. Also they should be notified that severe weight control is very harmful for health. This study indicate that nutrition education and correct information for body image. balanced diet. regularity of meals and food selection are required for middle school students at both school and home.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제12권2호
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• pp.111-118
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• 2006

본 연구에서는 클러스터 시스템에 적용되는 새로운 부하할당 알고리즘을 기존의 알고리즘과 비교하여 분석하고자 한다. PWLC 알고리즘은 설정된 가중치 산정주기마다. 시스템의 부하를 감지하여, 각 서버에 가중치를 부여하여 다음 주기에 가중치에 의하여 부하를 분산시키는 알고리즘이다. PWLC 알고리즘과 DWRR 알고리즘을 가중치 산정주기를 변화시키면서 분산과 대기시간 등에 비교하였다. 가중치 산정주기가 너무 짧으면 시스템은 부하를 감지하는데 잉여부하가 소요될 수 있으며, 이와 반대로, 가중치 산정주기가 너무 길면 알고리즘 적용에 의한 부하할당이 비효율적으로 될 수 있다. PWLC 알고리즘이 DWRR 알고리즘보다. 더 효율적임을 알 수 있다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.209-214
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• 2003

We developed a new type of human-sized BWR (biped walking robot), named KUBIR1 which is driven by the closed-chain type of actuator. A new type of the closed-chain actuator for the robot is developed, which is composed of the four-bar-link mechanism driven by the ball screw which has high strength and high gear ratio. Each leg of the robot is composed of 6 D.O.F joints. For front walking, three pitch joints and one roll joint at the ankle. In addition to this, one yaw joint for direction change, and another roll joint for balancing the body are attached. Also, the robot has two D.O.F joints of each hand and three D.O.F. for eye motion. There are three actuating motors for stereo cameras for eyes. In all, a 18 degree-of-freedom robot was developed. KUBIR1 was designed to walk autonomously by adapting small 90W DC motors as the robot actuators and batteries and controllers are on-boarded. The whole weight for Kubir1 is over 90Kg, and height is 167Cm. In the paper, the performance test of KUBIR1 will be shown.

• 대한물리치료과학회지
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• 제17권1_2호
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• pp.33-39
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• 2010

Purpose: The purpose of this study was to analyze the effects of a balance training program using the TARGET Balance Trainer(TBT), which utilizes a visual target, on the balancing ability of normal, healthy individuals. Methods: Twelve healthy female students with an average of 20.7 years(SD=0.25), were participated in this study. They were randomly divided into two groups(6 subjects in each group); experimental group, control group. The experimental group underwent a 3-week training program using the TBT, while the control group trained using only a dynamic air cushion(DAC). Results: Compared to those who trained using only the DAC, participants who trained with the TBT had a smaller difference between the weights distributed(N) to their left and right foot while normal standing with their eyes open. The TBT group also showed a smaller discrepancy between the weights distributed(N) to their left and right sides while standing on one leg with their eyes open, and also with their eyes closed by eye band. Conclusions: TBT is effective to reduce the degree of weight shifting between left and right side in each group. This study is expected to provide a model for future clinical studies.

• 한국정보과학회논문지:소프트웨어및응용
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• 제36권5호
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• pp.396-400
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• 2009

다량의 데이터를 전송할 때, 시간 단축과 효율적인 트래픽관리를 위해 네트워크의 라우팅 선택 방법이 사용되고 있다. Ant 알고리듬을 적용한 AntNet은 라우팅 선택 확률이 동일할 때, 랜던선택을 한다. 그로인해서 불필요한 가중치가 발생하여 트래픽이 증가한다. 본 논문은 이를 해결하기 위해 GA 알고리듬을 AntNet에 적합하여 데이터 전송을 위한 전송시간 감소와 효율적인 트래픽 분산을 해결하였다. 제안한 알고리즘 성능평가를 위해서 본 논문에서는 대량의 데이터를 전송하기 위한 경로를 설정하고, 전송시간과 전송 오류율을 평가하여 우수성을 보였다.

• 설비공학논문집
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• 제28권10호
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• pp.414-419
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• 2016

Air flow measurement is a fundamental and important task for testing, adjusting, and balancing of HVAC system. However, it is difficult to carry out in the field due to the large size and weight of the flow meter. In this study, for the purpose of developing a small and portable flow meter, we proposed a different method of static pressure measurement and verified it experimentally. In the proposed method, static pressure difference was measured by inserting a tube inside the chamber before and after the nozzles. The results were compared with measurements according to the ANSI/ASHRAE standard. The results were in good agreement, indicating that the inserted tube method could be used for static pressure measurement of a portable flow meter. The proposed method eliminates the pressure tubes that are attached outside, which results in smaller size and easy handling.

• EDISON SW 활용 경진대회 논문집
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• 제5회(2016년)
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• pp.183-189
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• 2016

In this paper, an optimization study on a helicopter rotor blade cross-section was made. Generalization was made to the baseline cross-section to simplify the analysis. To have better performance in aeroelastic response, with the aerodynamic center being the origin of the baseline, the distance between aerodynamic center and shear center, and the distance between mass center and shear center of the blade were minimized. For efficient searching of optimum solutions over the design space, grid search method, which is a method of graphical search was used. Two design variables, radius of balancing weight at leading edge, and offset of the spar from leading edge were selected for the study. Cubic spline interpolation method was used to accommodate searching of the optimum solution. 2-Leveled searching system was devised in accordance with the interpolation method. Optimum solution was found to show 6% decrease in both distance between aerodynamic center and shear center, and mass center and shear center to the baseline.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2000년도 제26회 펄프종이기술 국제세미나
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• pp.34-39
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• 2000

Today's size of production operations in the packaging paper sector I sconstantly increasing , featuring integral processing systems, high-speed paper machines, and the increased marketing of lower basis weight products. The risk factors involved in these large investments lie more than ever in the available furnish potential and ongoing requirements for further closure of water loops and lower operating costs. A comparison is drawn between recovered paper furnish mixtures used in European mills with regard to fibre properties, strength potential and contaminant content, Both the furnish situation and development trends in modern fluting and testliner machines are instigating concept changes in stock preparation, the approach flow as well as in process water and rejects technology. Developments are currently focussed for example on more efficient debris separation using fine slotted screening, optimized refining , more systematic process water management with loop separation and integral water clarification as well as more efficient removal of microstickies, fillers and fines through appropriate combination of rejects handling and water clarification processes. Product quality differentiation depends decisively on strength characteristics as a function of refining , fines removal , paper machine technology, and sizing . Maximum availability of today's high speed paper machines and , as a result, cost effective production can be ensured by optimum balancing of all subsystems with in the overall concept and by reliable control of problems with contaminants and deposits.

• 한국운동역학회지
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• 제30권4호
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• pp.301-309
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• 2020

Objective: This study aimed to investigate the effect of white noise on dynamic balance in patients with stroke during walking. Method: Nineteen patients with chronic stroke (age: 61.2±9.8 years, height: 164.4±7.4 cm, weight: 61.1±9.4 kg, paretic side (R/L): 11/8, duration: 11.6±4.9 years) were included as study participants. Auditory stimulus used white noise, and all participants listened for 40 minutes mixing six types of natural sounds with random sounds. The dynamic balancing ability was evaluated while all participants walked before and after listening to white noise. The variables were the center of pressure (CoP), the center of mass (CoM), CoP-CoM inclined angle. Results: There is a significant increase in the antero-posterior (A-P) CoP range, A-P inclination angle, and gait speed on the paretic and non-paretic sides following white noise intervention (p<.05). Conclusion: Our findings confirmed the positive effect of using white noise as auditory stimulus through a more objective and quantitative assessment using CoP-CoM inclination angle as an evaluation indicator for assessing dynamic balance in patients with chronic stroke. The A-P and M-L inclination angle can be employed as a useful indicator for evaluating other exercise programs and intervention methods for functional enhancement of patients with chronic stroke in terms of their effects on dynamic balance and effectiveness.