• Title/Summary/Keyword: KOGA

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Status and Risk Factors of Strongyloides stercoralis Infection in Rural Communities of Xayaburi Province, Lao PDR

  • Senephansiri, Phasouk;Laummaunwai, Porntip;Laymanivong, Sakorn;Boonmar, Thidarut
    • Parasites, Hosts and Diseases
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    • v.55 no.5
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    • pp.569-573
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    • 2017
  • The present study was performed to reveal the current status and risk factors of Strongyloides stercoralis infections in the villages of Kenethao district, Xayaburi Province, Lao PDR. Fecal specimens were collected and examined for S. stercoralis using Koga-agar plate culture technique. Among 516 individuals, the prevalence of S. stercoralis and hookworm infection was 44.2% and 17.1%, respectively. Co-infection was detected in 13.2% of the cases. The prevalence did not significantly differ between males and females (P=0.193). However, the prevalence of S. stercoralis infection increased significantly with age (P=0.041). Of the risk factors examined, both performing farming activities (P=0.001) and walking barefoot when going outside of the house (P=0.003) showed significant correlations with S. stercoralis infections. Our results suggest that S. stercoralis is highly endemic in this area. The National Helminth Control Program of Lao PDR should take actions to control S. stercoralis infection. In addition, provision of health education about the benefits of wearing shoes would be important for reducing infection in the study area. Moreover, the application of high-sensitivity diagnostic approaches is needed to obtain the true impact of S. stercoralis infections in all rural communities in order to provide surveillance activities in Lao PDR.

Coarse Grid Wave Hindcasting in the Yellow Sea Considering the Effect of Tide and Tidal Current (조석 및 조류 효과를 고려한 황해역 광역 파랑 수치모의 실험)

  • Chun, Hwusub;Ahn, Kyungmo
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.30 no.6
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    • pp.286-297
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    • 2018
  • In the present study, wave measurements at KOGA-W01 were analyzed and then the numerical wind waves simulations have been conducted to investigate the characteristics of wind waves in the Yellow sea. According to the present analysis, even though the location of the wave stations are close to the coastal region, the deep water waves are prevailed due to the short fetch length. Chun and Ahn's (2017a, b) numerical model has been extended to the Yellow Sea in this study. The effects of tide and tidal currents should be included in the model to accommodate the distinctive effect of large tidal range and tidal current in the Yellow Sea. The wave hindcasting results were compared with the wave measurements collected KOGA-W01 and Kyeockpo. The comparison shows the reasonable agreements between wave hindcastings and measured data, however the model significantly underestimate the wave period of swell waves from the south due to the narrow computational domain. Despite the poorly prediction in the significant wave period of swell waves which usually have small wave heights, the estimation of the extreme wave height and corresponding wave period shows good agreement with the measurement data.

Back Ground and Expectation for Matrix Converter (PWM Cyclo-Converter) as New Drive System in Next Generation

  • Koga Takashi;Lee Hyun-Woo
    • Proceedings of the KIPE Conference
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    • 2003.07a
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    • pp.216-222
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    • 2003
  • Today we have excellent motor drive system using high frequency carrier PWM control voltage source inverter in the other hand, we have met serious problems caused by high frequency switching. PWM Cyclo-converter called Matrix converter is expected as the new strategy Possible to improve these problems and add some more convenient features suitable for new drive system. in this Paper, we will introduce the background, features and outline of this converter, and additionally introduce some remarkable activity on this converter

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Neural network structure design using genetic algorithm

  • Murata, Junichi;Tanaka, Kei;Koga, Masaru;Hirasawa, Kotaro
    • 제어로봇시스템학회:학술대회논문집
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    • 1995.10a
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    • pp.187-190
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    • 1995
  • A method is proposed which searches for optimal structures of Neural Networks (NN) using Genetic Algorithm (GA). The purpose of the method lies in not only finding an optimal NN structure but also leading us to the goal of self-organized control system that acquires its structure and its functionality by itself depending on its environment.

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An interactive environment for simulation and real-time implementation of control systems

  • Koga, Masanobu
    • 제어로봇시스템학회:학술대회논문집
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    • 1995.10a
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    • pp.336-339
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    • 1995
  • An approach to efficient implementation of real-time control systems is presented in this paper. A compiler for translation of control algorithms is used in combination with a general program for real-time control. The compiler translates control algorithms written for the simulation in a design language to an implementation language. The translated algorithms are then automatically incorporated in the real-time control program.

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AKARI-FIS POINT SOURCE CATALOGUE: CURRENT STATUS AND FUTURE PLAN

  • Yamamura, Issei;Makiuti, Sin'itirou;Ikeda, Norio;Koga, Tatsuya;Yoshino, Akira;Yamauchi, Chisato
    • Publications of The Korean Astronomical Society
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    • v.27 no.4
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    • pp.105-109
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    • 2012
  • The current status of the AKARI-FIS Point Source Catalogue is reported. The first version of the Bright Source Catalogue has been in public since March 2010 and used extensively in the various fields in astronomy. The second version of the Bright Source Catalogue and the first version of the Faint Source Catalogue are currently under development. The revised Bright Source Catalogue is expected to have improved completeness, reliability, and accuracy compared to the current version. The Faint Source Catalogue will have a scan-density dependent detection limit and will enable much deeper exploration of the sky especially in the high-ecliptic latitude regions. Both catalogues will be available in a year time scale.