• Title/Summary/Keyword: Conversion Education

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Design of Simulated Photovoltaic Power Streetlight for Education using Renewable Energy Utilization and Storage Function (신재생에너지 활용 및 저장기능을 이용한 교육용 모의 태양광발전 가로등 설계)

  • Yoon, Yongho
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.21 no.2
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    • pp.137-142
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    • 2021
  • A Photovoltaic power streetlight is a system that uses solar energy to charge a secondary battery and then uses it for night lighting through a lamp, and can be configured as a standalone or grid-connected type by installing an LED streetlight at the load end. The energy generated through the solar cell module can be charged to the secondary battery through the charge/discharge control device, and then the LED street light can be turned on and off by comparing the power generation voltage and the charging voltage according to the monitoring of solar radiation, or by setting a specific time after sunset or sunrise. Based on these contents, this paper designed and manufactured a simulated solar power streetlight for education using new and renewable energy utilization and storage functions. Using these educational equipment, students can 1) understand the flow of energy change using renewable energy including sunlight as electric energy, 2) understand new and renewable energy, and cultivate basic design and manufacturing application power of related products, 3) The use of new and renewable energy through power conversion and strengthening of practical training and analysis through hardware production can be instilled.

Responses in growth performance and nutrient digestibility to a multi-protease supplementation in amino acid-deficient broiler diets

  • Cho, Hyun Min;Hong, Jun Sun;Kim, Yu Bin;Nawarathne, Shan Randima;Choi, Inchul;Yi, Young-Joo;Wu, Di;Lee, Hans;Han, Seung Eun;Nam, Ki Taeg;Seoung, Eun Il;Heo, Jung Min
    • Journal of Animal Science and Technology
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    • v.62 no.6
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    • pp.840-853
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    • 2020
  • The present study was conducted to investigate the effect of a multi-protease on production indicators of broiler chickens fed a crude protein and amino acid deficient-diets for 35 days immediately after hatch. A total of 448 one-day-old Ross 308 male broiler chicks were allocated in a completely randomized design into one of eight dietary treatments (positive control [PC], negative control [NC: minus 0.5% from PC, and minus 2% of lysine, methionine, threonine and methionine plus cysteine], extreme negative control [ENC: minus 1% from PC, minus 4% of lysine, methionine, threonine and methionine plus cysteine], and plus multi-protease 150 or 300 g per ton [e. g., PC-150]; PC, PC-150, NC, NC-150, NC-300, ENC, ENC-150, ENC-300) to give eight replicates with seven birds in a battery cage. Body weight, average daily gain, average daily feed intake, feed conversion ratio, and mortality were measured every week. Carcass traits, proximate analysis of breast meat, and ileum digestibility were analyzed on day 21 and 35. Feeding a multi-protease (i.e., more than 150 g/ton) for 35 days immediately after hatching improved feed efficiency and ileum digestibility (i.e., dry matter, crude protein, and energy) compared to their counterparts (i.e., diets without multi-protease: PC, NC, and ENC). In conclusion, our results indicated that broiler chickens fed nutrients deficient-diet (i.e., crude protein and amino acids) supplemented a multi-protease had an ability to compensate and (or) improve their growth performance commensurate with increased ileal digestibility for 35 days immediately after hatch.

A Study on the Application Status of RDA and Librarians' Perceptions in University Libraries in Korea (국내 대학도서관의 RDA 적용현황 및 사서들의 인식에 관한 연구)

  • Cho, Sungwon
    • Journal of the Korean Society for Library and Information Science
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    • v.56 no.3
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    • pp.363-389
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    • 2022
  • The study aims to investigate the perception of RDA by domestic university library librarians, the current status and plan of RDA application in university libraries, and propose considerations for establishing RDA in domestic university libraries. Through literature review, questionnaire items were prepared to investigate librarians' perception of RDA and the status of RDA in university libraries, and the application status of cataloging rules and education status of cataloging rules in Korea were investigated. Based on the results of the survey, the conversion of the cataloging rules from AACR2 to RDA requires expansion of RDA education and development of curriculum for librarians, and efforts and support such as preparing RDA format and application guidelines at the library level. At the level of national institutions such as the National Library of Korea, implications such as the necessity of enacting RDA application guidelines were presented.

Optimization of Hydrogen Production Process using 50 Nm3/h Biogas (50 Nm3/h급 바이오가스 직접 이용 수소 생산 공정 최적화)

  • Gi Hoon Hong;DongKyu Lee;Hyeong Rae Kim;SangYeon Hwang;HyoungWoon Song;SungJun Ahn;SungWon Hwang
    • Journal of the Korean Institute of Gas
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    • v.28 no.1
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    • pp.44-52
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    • 2024
  • This study presents a novel approach to hydrogen production by biogas from organic waste without CO2 removal. A process model was developed to reduce the costs associated with biogas pretreatment and purification processes. Through optimization of heat exchange networks, the simulation aimed to minimize process costs, maximizing hydrogen production and flue gas temperature. The results reveal that the most efficient process model maximizes the flue gas temperature while following the constraint of the number of heat exchangers. These findings hold promise for contributing to the expansion of "Biogas-to-clean hydrogen" energy conversion technology.

Analyses of the Basic Inquiry Process in Korean 3-10 Grade Science Textbooks: Focused on Observation and Measurement (우리나라 3-10학년 과학 교과서에 나타난 기초탐구과정 분석: 관찰 및 측정 탐구요소를 중심으로)

  • Park, Bo-Hwa;Kim, Hee-Kyong;Lee, Bong-Woo
    • Journal of The Korean Association For Science Education
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    • v.27 no.5
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    • pp.421-431
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    • 2007
  • The purpose of this study was to examine the characteristics of observation and measurement inquiry process in the Korean science textbooks. For the inquiry process of observation, the higher grade textbooks contained more 'comparative observation' rather than 'simple observation'. Students should express their observation results in written words rather than verbal descriptions in the higher grade. For the inquiry process of measurement, the temperature measurement was the most frequent measurement activity. 'Measurement design' was found more frequently in the lower grade textbooks. The uses of measurement tools were not presented systematically and were presented restrictively when the relevant experiment wanted to use these tools. The higher grade textbooks include 'quantitative measurements' rather than 'qualitative measurements' and 'operation measurement' rather than 'simple measurement'. In the application of measurement results, we had difficulty in finding the activities related with the usage of unit, unit conversion, significant figure, error and uncertainty.

Effect of thermal treatment on spray deposited CdTe thin films (스프레이 증착법을 이용한 CdTe박막의 열처리에 따른 특성 분석)

  • Lee, Jinyoung;Hwang, Sooyeun;Lee, Taejin;Ryu, Siok
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.11a
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    • pp.49.2-49.2
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    • 2010
  • Polycrystalline CdTe thin films for solar cell continues to be a promising material for the development of cost effective and reliable photovoltaic processes. The two key advantages of this material are its high optical absorption coefficient and its near ideal band gap for photovoltaic conversion efficiency of 1.4-1.5 eV. In this study we made the CdTe thin films for solar cell application which was deposited on the glass substrates using a modified chemical spray method at low temperature. This process does not require the sophisticated and expensive vacuum systems. The prepared CdTe films were characterized with the aid of scanning electron microscope (SEM), UV-visible spectrophotometer, and X-ray diffraction spectrometer (XRD). Following are results of a study on the "Human Resource Development Center for Economic Region Leading Industry" Project, supported by the Ministry of Education, Science & Tehnology(MEST) and the National Research Foundation of Korea(NRF).

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A Study on the Cause of Occurrence of unsold School Facilities and the Use of Sites (미매각 학교시설용지의 발생원인 규명 및 용지 활용에 관한 연구)

  • Lee, Seong Keun
    • The Journal of Sustainable Design and Educational Environment Research
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    • v.17 no.1
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    • pp.40-49
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    • 2018
  • School facilities are important facilities in neighboring residential areas and occupy important physical and social positions. Not using school facility occur to an obstacle to the environment of the local residents and cause a great waste of local land resources, due to its size and location. Therefore, it is necessary to establish a system to identify the cause of the unsold school facility site and to prevent it. On the other hand, it is necessary to make quick use of the unemployed school facility site through conversion of usage.

An Analysis of the Archetypical Symbols of Children's Performance with Water During Sandplay Therapy (아동의 모래놀이치료에서 물(水)을 통한 연행의 상징 분석)

  • Goh, Eun-Kyoung;Chung, Kai-Sook
    • Korean Journal of Child Studies
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    • v.32 no.3
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    • pp.185-202
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    • 2011
  • The purpose of this study was to understand the archetypical symbols present when conducting sandplay therapy with water from a hermeneutic point of view. The research participants were 6 children aged 8~9 who experienced problems in parent-children relationships. The result were as follows : The nature of archetypical symbols of present when working with water can be structured along two themes, vertical movements and horizontal movements. In vertical movements with three sub-themes, the meaning of 'to put in and boil out' is interpreted as 'mother's feeding baby', the meaning of 'to sink and bring out of water' is interpreted as 'resource acquisition', 'to swamp and float on the water' represents 'death and rebirth'. In horizontal movements consisted of two sub- themes, the meaning of 'to be swept away' is interpreted as 'initiation and conversion', the meaning of 'to wave and fix' is interpreted as 'to overcome the difficulties and create stability'.

A Model Development of Oriental Nursing Management System Through a Comparative Study of Korea & China (${\cdot}$ 중 비교연구를 통한 한방간호 관리체계 모형개발)

  • Park, Shin-Ae;Kim, Kwang-Joo;Kim, Il-Won;Moon, Heui-Ja
    • Journal of Korean Academy of Nursing Administration
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    • v.10 no.1
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    • pp.121-140
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    • 2004
  • Purpose: This study is to analyse and observe the college of oriental medicine related with nursing investment contents, its conversion process and output to get good qualified oriental nursing result, thus developing a matrix of oriental nursing management system on the basis of that project. Method: This study was nursing management system of matrix developmental study for Korea was performed to the objectives of 11 college of oriental medicine nursing directors and 328 nurses with more than three-year experiences in Korea. Result: We found difficulties to utilize knowledge obtained through the regular curriculum to the practice of oriental nursing because only me or two subjects were running or even no syllabus. Therefore, we recommend that oriental nursing in-service education program as well as oriental nursing practice preceptorship should be administered en site. The evaluation of oriental nursing and its feedback, duty related multiple evaluation, aggressive QI activity and feedback of the performance evaluation oriental nurse's role and duty manual also should be essentially organized. Conclusion: We urgently request that the consensus of nursing school and nurse association to be made about oriental nursing activity as a basic curriculum of compulsive subject.

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Promoting of Social Enterprise and Training System for Social Enterpriser (사회적 기업의 육성과 사회적 기업가 양성 체계)

  • Lee, Yoon-Jung
    • The Journal of the Korea Contents Association
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    • v.10 no.8
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    • pp.341-348
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    • 2010
  • The aim of this article is suggesting the training system of social enterpriser through the discussion about the promoting of social enterprise to meet the demands of the times. The part of discussion about the promoting of social enterprise addresses the social background, a fundamental concept, directivity, the present condition of social enterprise and the current social enterpriser's training program. The part of proposal about the training system of social enterpriser gives two areas that support social enterprise's establishment and conversion with supply a basic knowledge of social enterprise and deal with expert knowledge and management strategy making preparations as a social enterpriser. These suggestions introduced in the training system should go ahead in phases through the government aids.