• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2006년도 한국컴퓨터종합학술대회 논문집 Vol.33 No.1 (B)
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• pp.61-63
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• 2006

앞으로 도래하게 될 유비쿼터스 기술은 사람의 생활을 편리하게 만들어 줄 것이다. 또한 이미 많은 나라에서도 유비쿼터스 기술개발에 많은 투자를 하고 있다. 본 논문에서는 이러한 유비쿼터스 기술을 바탕으로 제공될 서비스와 서비스 시나리오에 대해 연구하였다. 누구(서비스를 제공받는 사람)에게 어떠한 서비스를 제공해야 하는가의 문제와 실제 서비스가 어떠한 과정으로 실행되어지는가의 문제는 앞으로 유비쿼터스 환경에서 반드시 풀어야 할 문제이다. 따라서 시스템 개발을 위한 서비스 결정 모델과 서비스의 상태전이를 통해 원활한 서비스 제공을 하기 위한 모델을 제시하였으며 유비쿼터스 환경을 갖춘 고등학교라는 특정 도메인을 대상으로 서비스 시나리오에 모델을 적용 및 프로토콜을 적용한 사례연구를 하였다.

• 천문학회지
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• 제41권3호
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• pp.77-81
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• 2008

As a continuation of a previous work by Park et al. (2006), we have developed a two-element radio interferometer that can measure both the phase and amplitude of a visibility function. Two small radio telescopes with diameters of 2.3 m are used as before, but this time an external reference oscillator is shared by the two telescopes so that the local oscillator frequencies are identical. We do not use a hardware correlator; instead we record signals from the two telescopes onto a PC and then perform software correlation. Complex visibilities are obtained toward the sun at ${\lambda}\;=\;21\;cm$, for 24 baselines with the use of the earth rotation and positional changes of one element, where the maximum baseline length projected onto UV plane is ${\sim}\;90{\lambda}$. As expected, the visibility amplitude decreases with the baseline length, while the phase is almost constant. The image obtained by the Fourier transformation of the visibility function nicely delineates the sun, which is barely resolved due to the limited baseline length. The experiment demonstrates that this system can be used as a "toy" interferometer at least for the education of (under)graduate students.

• 한국과학교육학회지
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• 제37권4호
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• pp.625-636
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• 2017

이 연구는 과학영재학교, 과학고, 일반고의 운영 형태 측면에서 어떤 차이가 있는지 비교하고, 이 중 고등학교 유형에 따라 차이가 큰 핵심 변인은 무엇인지 과학영재교육 수혜자의 인식을 토대로 알아보기 위한 것이다. 이를 위하여 수혜자 288명을 대상으로 고등학교 교육 경험에 대한 설문을 실시한 후 응답 결과를 졸업한 고등학교 유형에 따라 과학영재학교, 과학고, 일반고의 세 집단으로 구분하고 일원배치분산분석을 실시한 후 집단 간 차이를 비교하였다. 분석 결과는 다음과 같다. 첫째, 최대유사체계 분석기법을 활용하여 고등학교 유형별 운영형태를 비교한 결과 교육과정 및 교원 운영 관련 변인에 차이가 있음을 확인하였다. 둘째, 수혜자들의 교육경험을 토대로 과학영재학교, 과학고, 일반고의 교육과정 운영 및 교사 전문성 측면에 대한 인식을 분석한 결과 모든 영역에 걸쳐 과학영재학교일수록 만족도가 높고 과학고, 일반고로 갈수록 만족도가 낮았다. 셋째, 고등학교 유형별 운영형태에 대한 수혜자들의 인식을 비교한 결과 과학영재학교와 과학고의 운영 형태에 차이를 보이는 핵심 변인은 교육과정 측면의 교육내용, 교수-학습과정 및 학습 환경으로 나타났다. 이 연구결과는 향후 영재 교육과정 개선을 위한 기초자료로 활용될 수 있을 것으로 기대된다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2003년도 춘계전력전자학술대회 논문집(2)
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• pp.491-494
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• 2003

This paper presents a new conceptual electromagnetic induction eddy current-based stainless steel plate spiral type heater for heat exchanger or Dual Packs Heater in hot water producer, boiler steamer and super heated steamer, which is more suitable and acceptable for new generation consumer power applications. In addition, all active clamped edge resonant PWM high frequency inverter using trench gate IGBTs power module can operate under a principle oi zero voltage soft communication with PWM is developed and demonstrated for a high efficient Induction heated hot water producer and boiler in the consumer power applications. This consumer induction heater power appliance using active clamp soft switching PWM high frequency inverter is evaluated and discussed on the basis of the simulation and experimental results.

• 한국과학교육학회지
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• 제6권2호
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• pp.43-52
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• 1986

It is the purpose at thus survey to get hold at problems in teaching integrated science in middle school. For this purpose, problems and suggestions were collected by questionnaire which were made out by middle school science teachers. Through the analysis of the questionnaire, it was found that the present curriculum of science education in the college of education and the in-service training program were not suitable for training middle school science teacher. Form the results of the analysis, this survey concluded that the curriculum and program mentioned above need improvement as follows. (1) science education curriculum in the college of education should be set up with two part. One is the part that middle school science teachers are trained and the other is the part that high school science teachers are trained. (2) In-service training program should be set off into two kinds. One is the program that middle school science teachers are trained and the other program that high school science teachers are trained.

• 수산해양교육연구
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• 제25권6호
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• pp.1306-1314
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• 2013

The purpose of this study is to find the structural relationships among major satisfaction, career search efficacy, and career exploration behavior with marine science high school students. For investigating this topic, 524 students were surveyed from the marine science high schools. In order to find out the structural relationships among major satisfaction, career search efficacy, and career exploration behavior, structural equation modeling was used. Followings were the results of the research: (a) Major satisfaction effected significantly on the career search efficacy. (b) Career search efficacy effected significantly on the career exploration behavior. (C) There was not significant direct cause and effects from major satisfaction to career exploration behavior, but indirect effect was significant. Some recommendations were suggested for increasing career exploration behavior of marine science high school students.

• 한국식품조리과학회지
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• 제32권2호
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• pp.222-232
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• 2016

Purpose: Sodium intake in school meals is very high. Accordingly, many health problems have emerged. The objective of this study was to assess school dietitian's awareness and practice of sodium contents in urban and rural locations schools and suggest sodium reduction plan in school meal service. Methods: A total of 524 nationwide school dietitians from elementary, middle, and high schools in south Korea were surveyed using questionnaires to determine their awareness and practicing behavior for reducing high-salt contents in meals. Sodium reduction plan was then suggested accordingly. Results: Most school dietitians (83%, n=436) were aware of the necessities of sodium reduction in school meals. They were aware of optimum sodium levels at 700-1000 mg. However, the percentages of dietitians who had practicing behavior of using measuring utensils for seasoning were 20.7% (n=108), 14.9% (n=78), and 13.5% (n=71) in elementary, middle, and high schools, respectively (p<0.001). Dietitians in urban elementary and middle schools had significantly (p<0.01) higher practicing behavior of using measuring utensils compared to those in rural locations. Considering low levels of soup contents with high amount of leftover, the desirable soup portions to be reduced were '50-100 mL' (n=66, 12.7%) for elementary school and '100-150 mL' for middle school (n=62, 12.0%) and high school (n=57, 11.0%, p<0.001). Conclusion: Dietitians' awareness for sodium reduction was high but their practicing behavior was relatively low. Thus, continuous efforts are required to develop reduced-sodium menu by promoting the use of measuring utensils when preparing meals and by planning no soup meal day or educating students and teachers about the importances of reducing sodium in school meals.

• 한국지구과학회지
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• 제26권6호
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• pp.511-523
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• 2005

본 연구에서는 한국 지구과학 올림피아드 문항의 질 향상 방안을 모색하고자 1회와 2회 예선 및 본선 문항을 다양한 측면에서 분석하였다. 문항 분석을 위해 내적 및 외적 문항 분류틀을 구안하여 적용하였다. 고전 검사이론을 적용하여 문항의 난이도와 변별도, 상관계수, 그리고 신뢰도를, 일반화가능도 이론을 적용하여 일반화가능 도를 각각 추정하였다. 문항 분류틀 적용 결과는 다음과 같다: (1) 내용 차원에서는 지질 영역과 천문 영역에, 지식 및 탐구과정 차원에서는 자료 분석 및 해석에 집중되는 경향을 보였다. 또한 맥락 차원에서는 거의 대부분의 문항이 교과서적인 상황을 토대로 한 것이었다. (2) 요구 사고 수준에서 예선과 본선간의 차이를 발견할 수 없었다. (3) 문항 표현 범주에서는 그림의 사용 비율이 가장 높았고, 문항 유형 범주에서는 예선은 선다형과 단답형의 비율이, 본선은 서술형의 비율이 높았다. 또한 문항 형식 범주에서는 중학부와 예선은 단독형의 비율이 높고, 고교부와 본선은 복합형의 비율이 높았다. 문항을 분석한 결과는 다음과 같다: (1) 중학부는 대체로 난이도가 낮고, 변별도는 적절하였다. 그러나 고교부는 일반고와 과학고간에 상당한 차이가 있었다. (2) 중학부는 대기 영역과 총점과의 상관이, 고교부는 천문 영역과 총점과의 상관이 가장 높았다. (3) 양호한 문항이 가장 많은 일반고부의 문항 내적 일관성신뢰도와 일반화가능도가 가장 높았다. (4) 일반 고는 출제된 문항 수로 적정 수준의 일반화가능 도에 도달되나, 중학부나 과학고는 출제된 문항보다 2배 이상 많은 문항수가 필요한 것으로 나타났다.

• 대한영양사협회학술지
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• 제9권1호
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• pp.13-21
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• 2003

Dietitians' satisfaction between elementary school and high school in KangWon Do region were surveys with questionnaires. 61 elementary school dietitians and 30 high school dietitians participated. The dietitians in elementary schools had higher scores in age, marital status, years at work, types of employment, average annual income and had lesser hours of work. In overall, elementary schools had higher percentage on self operation and on the period of their food distribution to students. High schools had higher percentage on conventional systems, freedom in the amount of food distribution, number of meals per day and the meal charge. It was clear that dietitians in high schools showed more interests in changing their careers due to the poor working environment and salary. The highest score was on the relationship with other coworkers and the lowest score was on the poor working environment and salary. In general, dietitians in both types of schools are not satisfied with their career, especially with the working environment and salary.

• 한국식품조리과학회지
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• 제16권2호
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• pp.112-120
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• 2000

The purpose of this study was to examine the needs of high school students on foodservice. A survey from 8 high school foodservice operations in Seoul was undertaken and detailed information was collected from 538 high school students. Completed questionnaires were received from 3 self-operated and 5 contracted school foodservice operations. Statistical analyses were performed by SPSS including descriptive analysis and t-test. The 49.8% of the respondent students were male and 50.2% female. The whole students assessed the importance and performance of school foodservice as 4.18 and 2.83 out of 5 respectively, which suggests that the school foodservice needs to be improved. The Importance-Performance Analysis(IPA) used for obtaining information on high school foodservice management suggested that foodservice attributes with fair to poor performance but with high importance were sanitation of food, service of foodservice personnel, dealing with complaints and the reflection of students'opinion in menu.