• Title/Summary/Keyword: research instruments

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Smart support system for diagnosing severe accidents in nuclear power plants

  • Yoo, Kwae Hwan;Back, Ju Hyun;Na, Man Gyun;Hur, Seop;Kim, Hyeonmin
    • Nuclear Engineering and Technology
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    • v.50 no.4
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    • pp.562-569
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    • 2018
  • Recently, human errors have very rarely occurred during power generation at nuclear power plants. For this reason, many countries are conducting research on smart support systems of nuclear power plants. Smart support systems can help with operator decisions in severe accident occurrences. In this study, a smart support system was developed by integrating accident prediction functions from previous research and enhancing their prediction capability. Through this system, operators can predict accident scenarios, accident locations, and accident information in advance. In addition, it is possible to decide on the integrity of instruments and predict the life of instruments. The data were obtained using Modular Accident Analysis Program code to simulate severe accident scenarios for the Optimized Power Reactor 1000. The prediction of the accident scenario, accident location, and accident information was conducted using artificial intelligence methods.

Concurrent Validity, Inter-Tester and Intra-Tester Reliability of Goniometric Measurement of Active Elbow Range of Motion Using 4 Different Types of Measuring Instruments (주관절 가동범위 측정법에 대한 동시타당도와 신뢰도)

  • Current, Marion E.;Yi, Chung-Hwi
    • Physical Therapy Korea
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    • v.2 no.2
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    • pp.46-55
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    • 1995
  • The purpose of this study was to assess the concurrent validity and reliability of goniometric measurement of joint motion. Subjects were 40 healthy university students. Measurements were performed by 4 inexperienced physical therapy students. Four different instruments were used and three readings were taken with each instrument in random order making a total of 12 readings for flexion of the right elbow of each subject. Goniometers used were 1. universal 2. fluid-based goniometer/inclinometer 3. digital LCD goniometer 4. electronic goniometer/torsiometer. The results were as follows: Concurrent validity was highest (r= .94) with the universal and digital LCD tools. Interrater reliability (Pearson Product Moment Correlation) was good for each tool. Interrater reliability calculated by ICC(2,1) was highest (.96) with the tensiometer and lowest (.78) with the digital LCD goniometer. Intrarater reliability calculated by ICC was excellent (${\geq}.90$) for all instruments. These results show that concurrent validity, intrarater and interrater reliability are very good in the used of all four types of goniometers/inclinometer/tensiometer, even with inexperienced raters. These results confirm the almost universal reliance on hand held goniometers for joint measurement by physical therapists as being a reliable practice. Further research should be done clinically with actual patients.

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Development Plan of Package-type Instruments for Next-Generation Space Weather Observation Network

  • Choi, Seonghwan;Kwak, Young-Sil;Lee, Wookyoung
    • The Bulletin of The Korean Astronomical Society
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    • v.46 no.2
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    • pp.77.2-77.2
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    • 2021
  • Starting with the observation of sunspots in 1987, Korea Astronomy and Space Science Institute (KASI) has developed and installed various ground-based instruments for space weather research in Korea. Recently, SNIPE and CODEX are also being developed as space-based instruments. Expansion of the observation area and simultaneous observation have become important in the study of space weather. We have started Next-Generation Space Weather Observation Network Project this year. In order to establish a solar observation network, we planned to develop the Next Solar Telescope (NxST) which is a solar imaging spectrograph, and to install three NxST in the northern hemisphere. And we also planned to develop the Thermosphere-Ionosphere-Mesosphere Observation System (TIMOS), Global Navigation Satellite System (GNSS), and Geomagnetic packages, and install them in about ten sites over the world, for the purpose of establishing a global observation network for the near-earth space weather. We can take simultaneously observed space weather data in the global area, and are expecting it will play an important role in the international community for space weather research. We also have a strategy to secure observational technologies necessary for big space missions in the future, through this project.

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Technical Status of Microwave Remote Sensing of Tropical Cyclones (열대저기압 마이크로파 원격탐사의 기술 현황)

  • Choi, Geun-Chul;Yang, Chan-Su;Pack, Han-Il
    • Proceedings of KOSOMES biannual meeting
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    • 2006.11a
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    • pp.193-199
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    • 2006
  • This article reviews several microwave instruments employed in observation and analysis of tropical cyclones (TCs), typhoon, and hurricanes. Microwave signals are useful for observing tropical cyclones with severe storms since it isn't severely absorbed by the clouds and rain in the storm. The instruments discussed include scatterometers, microwave radiometers, synthetic aperture radars (SARs), and rain radar from space. The date such as winds, rainfall and cloud-distribution in the TCs obtained by microwave instruments provide important informations for forecasting the intensity and path of the typhoon. For example, there're wind-distribution provided by SSM/I which has a wide swath, detailed wind fields from ERS-1, 2 scatterometers and RADARSAT-1 SAR and TRMM's rain radar pro 떠 ding high resolution. Operational satellite instruments lunched recently have improved upon the problems of low resolution and narrow swath indicated at the beginning microwave remote sensing. Understanding and practical using sufficiently about the microwave instruments will serve for searching the features such as generation and development of the TCs.

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Monitoring the Use of Health-Related Quality of Life Measurements in Korean Studies of Patients with Diabetes (국내 연구에서 당뇨병 환자 건강관련 삶의 질 측정에 관한 모니터링)

  • Lee, Eun-Hyun;Kim, Chun-Ja;Cho, Soo-Yeon;Chae, Hyun-Ju;Lee, Sun-Hee;Kim, Eun-Jung
    • Journal of Korean Academy of Nursing
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    • v.41 no.4
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    • pp.558-567
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    • 2011
  • Purpose: The purpose of this study was to monitor the use of health-related quality of life (HRQOL) instruments in Korean studies of patients with diabetes. Methods: Of 86 Korean studies initially identified, 17 studies met the inclusion criteria. For each study, a description of the instrument and its psychometric properties were monitored by the Instrument Review Criteria of the Scientific Advisory Committee. These criteria include conceptual definition, attributes, taxonomy, reliability, validity, responsiveness, administrative mode, and language adaptations. Results: Five generic and one diabetes specific type questionnaires were identified from the 17 studies. Of those studies, conceptual definitions with the attributes of multi-dimension and subjectiveness were provided for 11 studies (71%). In the analysis of conceptual taxonomy, only 6 studies were classified as HRQOL, while other studies were done as QOL or health status. In monitoring of psychometric properties, reliability, validity, and responsiveness were reported for 88.2%, 64.7%, and 29.4%, respectively. One generic instrument was developed with a Korean population, while the other instruments were developed for Western countries. However, language adaptations were performed for only a few of the instruments. Conclusion: The psychometric properties including responsiveness of most instruments warrants further research, and the development of diabetes-specific HRQOL measurements should be sought to facilitate intervention outcomes across Korean studies of patients with diabetes.

Development of National Curriculum-Based Assessment Standards and Instruments for High School Common Science (국가 교육과정에 근거한 공통과학 평가 기준 및 평가 도구 개발 연구)

  • Lee, Yang-Rak;Lee, Sun-Kyung;Hong, Mi-Young;Hong, Jae-Sig
    • Journal of The Korean Association For Science Education
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    • v.19 no.1
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    • pp.159-172
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    • 1999
  • This is the second year study of ''The Development of Model of National Criterion- Referenced Assessment Standards" that had started in 1997. In the study, national assessment standards for high school common science were developed based on national curriculum. In the whole process of developing the standards, high school teachers, university professors and administrators of the Ministry of Education have participated as the "developing group" or "consulting group". Through various activities such as conference, workshop, intensive work, examination by science education experts, the standards and instruments were developed and modified. The research contents can be itemized as follows: - modifying the achievement standards developed in the first year research based on the opinions of various experts(science teachers, professors of science education, philosophers) - developing assessment standards based on the specially designed system. The standards divide students' achievements into three levels(upper/middle/low) and state each level so that it can guide evaluation of achievement. - developing various types of test instruments to probe students' achievement levels for each assessment standard.

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A Study on the Musical Iconography Consideration of Yanggeum (양금의 음악도상학적 고찰)

  • Lee, You-Jung
    • Journal of Korea Entertainment Industry Association
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    • v.14 no.2
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    • pp.85-95
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    • 2020
  • An Instruments are not only for musical usage, but also for historical, social and cultural contexts. The yanggeum instrument began to be played in Persia before the 10th century and is played in various parts of the world in the 21st century. It has been handed over for many years and played creatively beyond the boundaries of the region. In this paper, we will learn about the meaning of Korean traditional yanggeum, which preserves its original shape without any change in form or technique, through a method of musical iconography. As a method of musical Iconography for the musical instruments, we examined the data on the drawings and compared it with the literature, focusing on the origin, form and performance of the instruments. I hope that this study will not only provide a new perspective on instrument research, but also help understand the historical, social and cultural implications of the instrument. It is hoped that research on musical instruments will be done in many different ways and that the realm of musical science will be approached widely.