• 제목/요약/키워드: Summer Program

검색결과 316건 처리시간 0.032초

습도 영향을 고려한 초소형 터보제트 엔진 성능시험 소개 (The introduction of Engine Performance Test for Miniature Turbojet Engine considering humidity effects)

  • 이보화;이경재;양수석;김유일
    • 한국추진공학회:학술대회논문집
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    • 한국추진공학회 2010년도 제35회 추계학술대회논문집
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    • pp.335-338
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    • 2010
  • 대기 중의 수증기는 가스터빈엔진의 주요성능에 많은 영향을 끼친다. 습공기의 영향은 기온 및 기압이 높은 여름철 해면 고도, 높은 비행 마하수 그리고 낮은 엔진 회전수에서 그 영향이 더욱 두드러진다. 이러한 습공기 유입에 따른 가스터빈 엔진의 성능변화의 정도를 살펴보고자 200lbf 급 초소형 터보제트 엔진의 고공환경 성능시험을 통해 습도가 엔진성능에 미치는 영향에 대하여 알아보았다. 고공환경 엔진시험을 통해, 건공기 유입에 비해 습공기 유입 시 순추력에서 2.826% 낮게, 비연료소모율에서 1.325% 높게 측정되었다.

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현장실습 참여학생에 대한 산재시 법적인 성격 (Legal nature on industrial disasters of students to participate in Co-op program)

  • 이무성
    • 대한안전경영과학회지
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    • 제17권2호
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    • pp.177-182
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    • 2015
  • Many students can experience, such as for credit and social activities through field trips and participate in field trips. For on-site field training exercise participants currently in Gwangju University They take part in field trip 1, 2, 3 and 4 as the type.. Field Practice 1 type in summer and 2 in winter of 4-week period during vacation holidays with 3 credits, field trips 3 type of 8-week period during vacational holidays with 6 credits recognized for \400,000 in job training fee is also payable by the Leaders in INdustry-university Cooperation Agency. 4 types of job training are fourth grade (Architecture Grade 5) can be employed in conjunction for more than 15 weeks and admitted to the second semester of 15 credits by participating in job training. For most schools, but to pay a fee-job training at the University of Hanyang University, Kyungpook National University has a student assistance in the field training participating companies. This establishment does not have a clear idea of the legal entities responsible in the event of industrial accidents. Academic research is also nonexistent state for them. In this paper, we distinguish the personality for it via the existing labor precedents with respect to the legal responsibility of an industrial accident. This aims at putting the means to establish the role of the University of job training support.

대학생의 이벤트 식단에 대한 선호도 조사 (A survey on Preference of the Event Menus in the Foodservice Operations for University Students)

  • 배현주
    • 대한영양사협회학술지
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    • 제12권3호
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    • pp.235-242
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    • 2006
  • The purpose of this study of was to provide basic data for preparing event menus to increase customer's satisfaction by investigating university students' participation and preference for the event menus in the foodservice operations. The questionnaires were distributed to 300 customers from August 1 to 31, 2005. 88.0% of the questionnaires were analyzed. Statistical analysis of data was performed using SAS package program(version 8.2) for descriptive analysis and $χ^2$-test, t-test, one-way ANOVA, Duncan multiple range test. The results of this study can be summarized as follows : 50.4% of the students have participated in foodservice operation's event and the average degree of the satisfaction was 2.67 out of 5. The type of the events customers have most frequently participated in were the national holiday·subdivisions of the season event(47.3%), the day event(34.1%), environment event(26.9%) and so on. In large classification, preferred were season event(85.2%), international food event(76.9%), and healthy food event(73.1%) and so on. In small classification, orgarnic food event(53.0%), summer fruits festival(41.3%), midsummer event(36.6%) and christmas event(34.4%) and so on. From now on, the event reflecting customers' expectation and requirement should be planned and implemented.

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시뮬레이션 분석기법을 이용한 주거용 건물의 공간별 채광성능 연구 (Space study on Lighting Performance For Residential Buildings By using Simulation Analysis)

  • 임태섭;임정희;김병선
    • KIEAE Journal
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    • 제13권3호
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    • pp.97-104
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    • 2013
  • This proposed simulation-based design study is based on the design of residential high-rise buildings in South-Korea. the purpose of this study is to evaluate the amount of daylighting performance passing through building glazing according to sky conditions, orientation of windows and each space of Apartment buildings. The clear sky includes sunshine and is intense and brighter at the horizon than at the zenith, except in the area around the sun. Daylight received within a building is directly dependent upon the sun's position and the atmospheric conditions. Orientation of the building generally used to refer to solar orientation which is the siting of building with respect to solar access. Although any building will have different orientations for its different sides, the orientation can refer to a particular room, or to the most important facade of the building. north-facing windows receive twice the winter sun than east and west facing windows, allowing light and warmth into the home. They can be easily shaded from the high summer sun to help keep the house cool. Ideally, the glazing area should be between 10-25% of the floor area of the room. This paper was calculated by a Desktop Radiance program. The space dimensions were based on a unit module of real constructed apartment having divided into five sections such as living room, room1, room2, room3 and kitchen.

Abnormal Winter Melting of the Arctic Sea Ice Cap Observed by the Spaceborne Passive Microwave Sensors

  • Lee, Seongsuk;Yi, Yu
    • Journal of Astronomy and Space Sciences
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    • 제33권4호
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    • pp.305-311
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    • 2016
  • The spatial size and variation of Arctic sea ice play an important role in Earth's climate system. These are affected by conditions in the polar atmosphere and Arctic sea temperatures. The Arctic sea ice concentration is calculated from brightness temperature data derived from the Defense Meteorological Satellite program (DMSP) F13 Special Sensor Microwave/Imagers (SSMI) and the DMSP F17 Special Sensor Microwave Imager/Sounder (SSMIS) sensors. Many previous studies point to significant reductions in sea ice and their causes. We investigated the variability of Arctic sea ice using the daily sea ice concentration data from passive microwave observations to identify the sea ice melting regions near the Arctic polar ice cap. We discovered the abnormal melting of the Arctic sea ice near the North Pole during the summer and the winter. This phenomenon is hard to explain only surface air temperature or solar heating as suggested by recent studies. We propose a hypothesis explaining this phenomenon. The heat from the deep sea in Arctic Ocean ridges and/or the hydrothermal vents might be contributing to the melting of Arctic sea ice. This hypothesis could be verified by the observation of warm water column structure below the melting or thinning arctic sea ice through the project such as Coriolis dataset for reanalysis (CORA).

태양전지와 LED를 이용한 인삼재배용 유리온실의 조도 시뮬레이션 (The Glass Greenhouse's Lighting Simulation for Ginseng with Solar Cell and LED)

  • 이붕주
    • 한국산학기술학회논문지
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    • 제20권2호
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    • pp.14-19
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    • 2019
  • 본 연구에서는 Si 및 DSSC의 태양 전지와 LED를 활용하여 제작될 유리 온실을 제작하기 전에 조명시뮬레이션 프로그램인 리룩스를 활용하여 최적의 유리 온실 설계 조건을 찾고자 진행 되었다. 천장의 투과율 15%과 측면의 투과율 40%을 기준으로 한 태양 전지가 다르게 설치되는 점을 감안하여 자연광에 따른 조명 시뮬레이션을 한 결과에 의하면, 유리 온실 건축물은 설계시 태양의 궤도에 대해 90도(북남방향) 배향 설계하는 것이 자연광을 가장 효과적으로 활용 할 수 있는 것을 확인하였고, 유리 온실내의 최적의 식물 성장을 위하여 자연광 조건을 고려한 시간별 인공 광원의 제어를 하는 경우 최대 에너지 절감은 하지인 경우 5.6 kwh (LED 제어 전 대비 42% 수준), 동지인 경우 7.8 kwh (LED 제어 전 대비 58% 수준)의 에너지 절감이 가능하며 광보상점 이상의 최적의 광특성 조건에서 인삼 재배가 가능함을 확인하였다.

Prediction of the number of public bicycle rental in Seoul using Boosted Decision Tree Regression Algorithm

  • KIM, Hyun-Jun;KIM, Hyun-Ki
    • 한국인공지능학회지
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    • 제10권1호
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    • pp.9-14
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    • 2022
  • The demand for public bicycles operated by the Seoul Metropolitan Government is increasing every year. The size of the Seoul public bicycle project, which first started with about 5,600 units, increased to 3,7500 units as of September 2021, and the number of members is also increasing every year. However, as the size of the project grows, excessive budget spending and deficit problems are emerging for public bicycle projects, and new bicycles, rental office costs, and bicycle maintenance costs are blamed for the deficit. In this paper, the Azure Machine Learning Studio program and the Boosted Decision Tree Regression technique are used to predict the number of public bicycle rental over environmental factors and time. Predicted results it was confirmed that the demand for public bicycles was high in the season except for winter, and the demand for public bicycles was the highest at 6 p.m. In addition, in this paper compare four additional regression algorithms in addition to the Boosted Decision Tree Regression algorithm to measure algorithm performance. The results showed high accuracy in the order of the First Boosted Decision Tree Regression Algorithm (0.878802), second Decision Forest Regression (0.838232), third Poison Regression (0.62699), and fourth Linear Regression (0.618773). Based on these predictions, it is expected that more public bicycles will be placed at rental stations near public transportation to meet the growing demand for commuting hours and that more bicycles will be placed in rental stations in summer than winter and the life of bicycles can be extended in winter.

과학동산 운영에 관한 질적 연구 (A Qualitative Study of Running질 Science Garden질)

  • 채동현;이수영
    • 한국초등과학교육학회지:초등과학교육
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    • 제21권2호
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    • pp.263-288
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    • 2002
  • 'Science Garden' is a science program that develops acquirements of science & technology at an early stage through experiential study and inspire the spirit of scientific inquiry by carrying out laboratory work, science movie, science lecture, scientific work, outdoor activities, computer classes and science experiment which is hard to do through the regular educational course. It is targeted grade 4,5,6 students during summer and winter vacation. 'Science Garden' is conducted by selective participation freely. It is a wholelistic activity that develops children's potential talents or creativities, improves interest and attitude toward science, and also gives opportunity for self-realization by extending capacity for inquiry to show each student's ability. This study is observed and is compared how it is conducted in elementary school using qualitative study. This study is used narrative observation, in-depth interview and document analysis. Objects of narrative observation are two elementary schools, each from Jellabukdo and Gyeonggido, and 7 teachers were interviewed in-depthly. Here are results of the study. 1 A teacher in school G never takes part in student activities, tends to be indifferent to classes, but focuses on observation and experiment in laboratory. And feedback or evaluation about student's activity is never done. On the other hand, a teacher in school S guides students to understand the principals of science on themselves, and wide variety forms of activities such as role playing, discussion, and games are being done. But an effort to evaluate student's activity is not being made properly. 2. Teachers set a high valuation on the need of 'Science Garden'. Observing the way of conducting 'Science Garden', usually teachers who is in charge of science for official work is selected as a teacher in charge, and groan under a heavy burden of conducting it without anyone's help. Participating students are selected by volunteering or teacher's recommendation, but because of low Participation rate, teachers have difficulty in conducting it. Plan for conducting ‘science Garden’ is made 20 days before it, after getting an official document from Office of Education, refering to booklets produced by National Jungang Science Institute, or data from Office of Education, and internet. Teachers evaluate rarely Most school principals have interest in 'Science Garden' but parents are not well aware of it, The budget is made at the same time with the plan, and scale is varied between 200,000∼500,000 won. Because of the improper way of selecting teacher in charge, difficulty in selecting students, heavy works caused by planning, conducting the program, as well as reporting teacher's work, and lack of parents' awareness, 'Science Garden' has been conducted formally and superficially. Next gives you direction to change, for the right way of conducting' Science Garden'. It is important to motivate competent teachers to instruct students actively. For students' active participation, They should publicize thoroughly beforehand, and develope 'Science Garden' program for teachers to be able to make better use of it. Evaluation of student activities and program should be done in the aspect of developing students’ faculties. Beside of school facilities, they need to put diverse local facilities and places to practical use for immediate natural experience. And not only separate schools but also associated form of schools to conduct it is necessary.

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과학교육 개혁 프로그램 '과학-기술-사회'의 국제적 동향-아이오와 프로그램을 중심으로- (The International Trend of Science Education Reform Program 'Science-Technology-Society'-The Case of Iowa Chautauqua Program-)

  • 조정일
    • 한국과학교육학회지
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    • 제18권1호
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    • pp.71-82
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    • 1998
  • 과학-기술-사회 (Science-Technology-Society)와 구성주의(constructivism) 학습올 근간으로 한 아이오와 치타콰 프로그램과 Iowa-Scope, Sequence and Coordination 현직교육 프로그램은 80년대와 90년대의 과학 교육 연구 결과와 사회의 변화에 기초하고 있다. 초, 중,고등학교 과학 교과과정을 마친 학생들이 아주 피상적인 과학적 소양올 갖고 있음이 많은 연구들을 통해 확인 된 것이다. 반면 학생들의 관심과 호기싱을 바탕으로 학 생들의 삶과 유관한 교육과정과 교수는 의미있는 과학학습으로 인도될 수 있다. 아이오와 치타콰 프로그램과 Iowa-Scope, Sequence and Coordination 현직교육 프로그램은 교사교육을 통해 현실과 유관한 과학교육을 수행하는데 큰 영향을 미쳤다. 인간의 삶의 맥락에서 구성주의 전략을 사용하여 과학을 가르치는 기법은 교사들에게 교수와 학습의 의미를 되새기게 했으며, 참여 교사들의 교수 전반에 영향을 주었다. 특히 모듈 개발을 통해 현장에서의 경험과 아이디어를 구체화하고 다양한 평가 방법을 통해 확인 된 연구 결과는 교사와 학생 모두에게 바랍직한 영향을 준 것으로 확인되었다. 본 현직교육 프로그햄들은 1년 혹은 3년 동안 같은 교사들을 대상으로 지속적으로 이루어져 현장 교육에 직접적인 영향을 주었다. 이 프로그램에 대한 구체적 적용을 통해 우리 나라 과학교육의 방향을 지식 암기 중심에서 학생들의 삶에 기초한 탐구와 적용 중심의 학습으로 바꿀 수 있을 것이다. 또한, 현직교육 프로그램의 개선을 통해 이론과 현장이 만나는 장을 만들 수 있을 것으로 사료된다.

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지역아동센터를 이용하는 아동을 위한 급식 및 요리활동 프로그램의 적용효과 평가 (Assessment of Foodservice and Cooking Program for Children Attending Community Child Centers in Korea)

  • 권수연;여윤재
    • 동아시아식생활학회지
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    • 제26권3호
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    • pp.223-229
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    • 2016
  • 본 연구는 2015년 여름방학과 겨울방학 기간 동안 전국에 위치한 60여 개소의 지역아동센터에서 급식 및 요리활동 프로그램을 실시하고 프로그램에 참여한 아동 1,120명을 대상으로 효과평가를 실시하였다. 해당 프로그램 중 급식 프로그램에서는 지역아동센터의 급식 관리자를 대상으로 영양 및 위생관리, 아동식생활 교육을 실시하고, 급식 제공 시 활용 가능한 지역아동센터 식단을 제공하였다. 요리활동 프로그램에서는 지역아동센터 이용 아동을 대상으로 요리활동을 6회 이상 지역아동센터에서 자체적으로 진행하도록 하였다. 설문지를 통하여 아동의 일반사항, 식생활 태도, 급식섭취량 및 프로그램 의견 및 만족도에 대해 조사하였다. 본 연구결과, 지역아동센터 아동은 급식 및 요리활동 프로그램 참여 이후, 설문조사를 통해 조사한 식생활 태도 관련 17개 모든 문항에 대해 평균 점수가 유의하게 증가하였으며, 식생활태도 총점이 85점 만점에 평균 59.71점에서 63.62점으로 유의하게 증가하여 아동의 식생활 태도가 긍정적으로 변화한 것으로 나타났다. 또한 급식 섭취량을 분석한 결과, 모든 급식의 섭취량이 유의하게 증가하였다. 특히, 선호도가 낮은 채소반찬의 섭취량은 프로그램 참여 전에는 3.63점이었으나, 프로그램 참여 후 3.81점으로 유의하게 증가하였다. 아동의 급식 및 요리활동 프로그램에 대한 만족도 총점은 35점 만점에 28.34점이었고, 만족도 조사 항목의 모든 항목의 평균 점수가 최저 3.81점, 최고 4.27점으로 비교적 만족도 높은 것으로 나타났다. 특히 '급식 및 요리활동 프로그램에 계속 참여하고 싶다'의 항목에서 가장 높은 만족도(4.27점)를 보여 지속적으로 참여하기를 희망하고 있었다. 본 연구결과, 지역아동센터에서 실시되는 급식 및 요리활동 프로그램은 아동의 편식을 개선하고, 식생활을 긍정적으로 변화시키는데 중요한 도구로 활용될 수 있는 것으로 나타났다. 그러나 지역아동센터에서는 예산 및 인력 등의 이유로 지속적으로 급식 및 요리활동 프로그램을 실행하기에는 어려움이 있는 것으로 생각된다. 이에 정부 및 유관기관에서는 지역아동센터에서 급식 및 요리활동 프로그램이 장기적 및 지속적으로 운영될 수 있도록 환경을 구축하는 방안 마련이 필요할 것으로 생각된다. 본 연구결과는 지역아동센터의 급식지원 프로그램 개발 및 보완을 위한 기초자료로 활용될 수 있을 것으로 여겨지며, 또한 향후 지역아동센터 아동이 건강한 식생활을 실천할 수 있도록 지원하는 정책 및 지침 마련에 활용될 수 있을 것이다.