• Title/Summary/Keyword: experience in plants

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How do Export Pioneers Emerge and How are They Related to Product Creators?

  • HAHN, CHIN HEE
    • KDI Journal of Economic Policy
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    • v.43 no.1
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    • pp.1-27
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    • 2021
  • In this paper, we empirically examine how export pioneers emerge and how they are related to product creators/innovators, utilizing a rich plant-product level dataset from the Korean manufacturing sector for the period of 1990-1998. Our analysis covers the process from the appearance of product creators as well as product imitators to the emergence of export pioneers. We find, first, that product imitators are larger, more productive and older than product creators. Second, most export pioneers are nevertheless found to be product creators. This result is largely due to the fact that almost all export pioneers export the products in the same year as product creation. Third, there are similarities as well as differences between product creators and export pioneers. Plants that are more productive or larger are more likely to become product creators as well as export pioneers. However, previous exporting experience positively affects the probability of export pioneering only, while plants' engagement in R&D positively affects the probability of product creation only. We discuss possible explanations for our main empirical results as well as their policy implications.

Development Process of Nuclear Power Industry in a Developing Country : Korean Experience and Implications (개발도상국에 있어서 원자력산업의 기술발전과정 분석 : 한국의 경험과 시사점)

  • 홍사균
    • Proceedings of the Technology Innovation Conference
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    • 1999.06a
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    • pp.176-202
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    • 1999
  • Korea has exerted her efforts to assimilate nuclear power technology, and reportedly localized 95 percent of nuclear power technology by 1995. This paper investigates the evolution of nuclear power program in Korea to exploit the development process of the nuclear power industry and key factors for the technological localization of nuclear power plant. In developing countries, an imitative catching-up process can be shown as a course for developing the absorptive capacity of foreign technology, which depends on prior knowledge base and the intensity of effort. The process of technological learning consists of five stages including preparation, implementation of foreign technology, acquisition of peripheral technology, acquisition of core technology, and improvement f foreign technology. Moreover, this paper discusses six essential factors that have influenced the successful achievement of technological localization of nuclear power plants in Korea. They include the role and strategies of the government, the leading role of utility firm, the development and cooperation of the related organizations, the development of human resources and their efforts, market conditions and the assistance of foreign donors, and social conditions. Finally, this paper discusses about implications offered by the Korean experience for other developing countries.

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A Study on the Flow Characteristic of surroundings of the Extracting Nozzle for Shell Wall Thinning of a Feedwater Heater (고압형 급수가열기 동체 감육 완화를 위한 추기노즐 주변의 유동특성 연구)

  • Seo, Hyuk-Ki;Kim, Yoon-Shin;Kim, Kyung-Hun;Hwang, Kyeong-Mo
    • Proceedings of the SAREK Conference
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    • 2009.06a
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    • pp.841-846
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    • 2009
  • Several nuclear power plants in Korea have experienced wall thinning damage in the area around the impingement baffle-installed downstream of the high pressure turbine extraction stream line inside number 5A and 5B feedwater heaters. At that point, the extracted steam from the high pressure turbine is two phase fluid at high temperature, high pressure, and high speed. This paper describes operation of experience and numerical analysis composed similar condition with real high pressure feedwater heater. This study applied several impingement baffle plates to feedwater heater same as previous study. In addition, it shows difference of pressure distribution and value between single phase and two phase based on experience and numerical analysis.

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A Study on the Environmental Education Experience and Environmental Perceptions of Citizens in Daegu (대구시민의 환경교육경험과 환경인식에 대한 연구)

  • Yamada, Keiko
    • Journal of Environmental Science International
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    • v.23 no.8
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    • pp.1469-1480
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    • 2014
  • This study, through the survey of citizens of Daegu in regard to the environment education experience and citizens perception, seeks to identify the order of importance and perception on the severity of environment. The survey has found that 36.4% citizens of Daegu have environment education experience. Those who have experience have high standard of living, live in high population density area and where pollutant generating plants are prevalent. In addition they are likely to live in apartment, are younger, and the higher the education level, more opportunities they have in getting environment education. The study has found that the environment education experience gives noticeable influence on environment perception, environment attitude, and environment activities. Also, those who have the environment education are likely to be interested in environment, know green growth policies, and are positive about local environment activities. Thus, they are willing to participate in activities to improve local environment and have emphasized the need for more environment education. As for what environment elements are most severe, they pointed to the "global warming and climate change" and "everyday garbage" and as for what are important, they chose "drinking water quality" and "global warming and climate change." Based on the study, we came to the conclusion that more environment education should be provided to elevate the interest in environment and subsequently, foster the sense of responsibility and civic mind toward the preservation of environment. In light of above, local governments must expand their supports and fully utilize the Local Agenda 21 to promote the education and increase the perception of citizens on the environment.

Safety Review Experience of Computerized Logic System for YGN 3 and 4

  • Yun, Won-Young;Kim, Dae-Il;Koh, Jong-Soo;Kim, Bok-Ryul;Oh, Sung-Hun;Lim, Jang-Hyun
    • Proceedings of the Korean Nuclear Society Conference
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    • 1995.05a
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    • pp.602-607
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    • 1995
  • This article presents safety review experience of microprocessor-based Interposing Logic System(ILS) of Engineering Safety Feature Actuation System(ESFAS). The ILS is the first application of computerized logic design to safety system in Korean nuclear power plants without verification of the system reliability by proven technology concept. As a result of evaluation for the ILS, Korea Institute of Nuclear Safety(KINS) concluded that the microprocessor-based ILS is not acceptable in some features detailed enough to defend against software common mode failures(CMF). Therefore, we required licensee to install hardwired interlock signal configuration and a Hardwired Backup Panel to control safety-related equipment. We believe that the microprocessor-based ILS with the hardwired backup panel and inter-connection of interlock signal by hardwired configuration will improve the plant safety.

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The Lived Experience of Working Women Raising Children (직장여성의 육아경험 - 1세 이하 유아를 중심으로 -)

  • Lee, Nae-Young;Koo, Mi-Jee;Kim, So-Hee;Kim, Young-Mi;Chang, Koung-Oh;Kim, Young-Hae
    • Child Health Nursing Research
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    • v.13 no.3
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    • pp.329-337
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    • 2007
  • Purpose: This study was done to describe the essential structure of the lived experience of working women raising children. Method: Data were collected from 10 employed women with children who were under 2 years of age. The analysis of the data was done using the phenomenological analytic method suggested by Colaizzi (1978). Results: In this study, 6 essential themes were extracted: 'knowing by intuition child-rearing is difficult', 'having guilt-conscious of not being able to perform duties as a mother', 'hard work of maintaining two jobs', 'Lost self', 'realizing that one has become amother', 'thirsting for a social support system'. Conclusion: With a rapidly increasing number of working women, the significance of this study in the field of nursing is in understanding the child-rearing experience of working women. The findings indicate the need for a systemic and emotional support system for working women raising children.

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The MSW Pyrolysis & Melting Plant DONGBU R21 (생활폐기물 열분해용융시설 동부 R21)

  • Choi, Sang-Sim;Kim, Seok-Hwan;Kim, Kyong-Lae
    • 한국연소학회:학술대회논문집
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    • 2004.06a
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    • pp.314-328
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    • 2004
  • Mitsui Engineering and Shipbuilding Co., Ltd. (MES) has completed Recycling 21 (R21) pyrolysis and melting technology for municipal solid wastes. The basic technology is licensed from Siemens, but MES has made major improvements to the design and operation of the R21 system Consequently, up to now, MES has been completed six (6) R21 plants in Japan. The following text will provide a brief overview of the design & operating features of R21 technology, focused on the reliability of system and low emission of hazardous material, which have been proved by the successful construction & operation experience of the plants.

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Development of Component Reliability Database for Korean Nuclear Power Plants and Chemical Plants (국내 원자력 발전소 및 화학공장의 기기 신뢰도 데이터베이스 구축)

  • 최선영;한상훈
    • Proceedings of the Korean Reliability Society Conference
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    • 2000.11a
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    • pp.269-277
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    • 2000
  • The component reliability database is required in PSA (Probabilistic Safety Analysis) for NPP (Nuclear Power Plant). We have applied a generic database to the PSA for the Korean NPPs, since there is no specific component reliability database. Therefore we are developing the plant-specific component reliability database for domestic NPPs. We also extend the experience and knowledge of PSA and component reliability database for NPP to chemical industry We collect the raw data like component operation history and maintenance history and then input the required data for the component reliability database through failure analysis. With the database, we can not only perform PSA with real data but also perform maintenance optimization.

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Qualitative Analysis of Positive Science Experiences in the Memory of Pre-service Elementary School Teachers (초등 예비교사의 기억 속 긍정적 과학 경험 사례에 대한 질적 분석)

  • Lim, Sung-Man;Shin, Jung-Yun
    • Journal of the Korean Society of Earth Science Education
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    • v.15 no.2
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    • pp.299-309
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    • 2022
  • The purpose of this study is to categorize specific factors and characteristics of positive science experience by qualitatively analyzing the positive science experience cases in the memories of pre-service elementary school teachers. For this purpose, 101 essays written by pre-service teachers on the theme of 'my enjoyable science class experience' were analyzed. The collected data were analyzed using an inductive analysis method, and as a result, the characteristics of positive science experience cases in the memories of pre-service teachers were categorized into 4 categories and 12 topic groups. Specifically, 'experience of exploratory activities using special materials', such as long-term raising and observation of animals and plants, experiments using edible materials, and using special experimental tools had a positive effect on scientific experience. In addition, 'experience of activities emphasizing scientific inquiry' such as emphasizing observation activities, experiments accompanied by clear experimental results, making activities, and using various materials also had a positive effect on science experience. In addition, 'student-centered activity experience' such as strengthening student autonomy, emphasizing collaboration between students, and performing science activities outside of the curriculum also had a positive influence on the science experience. Lastly, 'positive influence of teachers', such as teachers' encouragement and enthusiasm, helped to positively recognize science.

Learning Effects of SPACE Instructional Strategy on Children's Conceptual Change of Plants Growth (식물의 생장에 관한 아동들의 개념변화에 미치는 SPACE 수업전략과 효과)

  • Chung, Wan-Ho;Choi, Byung-Soon;Kim, Jeong-Ho
    • Journal of The Korean Association For Science Education
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    • v.13 no.3
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    • pp.327-333
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    • 1993
  • The purpose of this study was to investigate children's ideas about growth of plants and their conceptural change after instruction to apply SPACE (Science Processes And Concepts Exploration) Learning strategy. For this study, a total of 55 students from infants to 5th grade were sampled. Data were obtained by the individual interview procedure and summarized by using network analysis. The major results of this study were as follows : 1. A very small number of students responded reforming or reorganisation of materials about the mechanism of germination and growth inside the seeds. 2. Almost all students confused between conditions necessary for germination and growth. Water and sunlight were mentioned by many students, while air and temperature were mentioned by a few students as the condition. 3. Some of the students showed that growth occurs continuously. Many students explaned occurence of growth about Plants related to the night, monning, or evening. 4. With the explaning about the necessary conditions for caterpillar growth, students mentioned conditions related in terms of human experience. 5. Many young childrens showed tendency of the egocentric and human-centered view of the world. Students scientific concepts increased significantly with age. Many students conceptions depend on the context-specificity ideas.

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