• Industrial Engineering and Management Systems
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• 제11권3호
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• pp.233-240
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• 2012

The implementation of business process management (BPM) systems in large number of business organizations transforms BPM system into such a level of maturity and tends to collect large repositories of business process (BP) models. This issue encourages BP flexibility that leads to a large number of process variants derived from the same model, but differing in structure, to be stored in the large repositories of BP models. Therefore, the repositories may include thousands of activities and related business objects with variation of requirements and quality of service. It is a common practice to customize processes from reference processes or templates in order to reduce the time and effort required to design and deploy processes on all levels. In order to address redundancy and underutilization problems, a generic process model, called as reference BP, is absolutely necessary to cover the best of process variants. This study aims to develop multiple-objective business process genetic algorithm (MOBPGA) to find a set of non-dominated (Pareto) solutions of business reference model to enhance conventional approach which considered only a single objective on creating BP reference model by using proximity score measurement. A mixed-integer linear program is constructed to evaluate performance of the proposed MOBPGA on small-scale problems by using standard measures for multiple-objective techniques. The results will show the viability of applying MOBPGA in terms of simultaneously maximizing proximity score measurement, minimizing total duration, and total costs of the selected reference model.

• 한국항해항만학회지
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• 제36권6호
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• pp.437-442
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• 2012

국토해양부에서는 NDGPS 서비스의 광역화와 상용화를 위하여 2012년 현재 지상파 DMB 기반 DGPS 서비스를 구축하여 전국적으로 실험방송을 하고 있다. 이 연구에서는 저가의 GPS 수신 장비를 사용하여 지상파 DMB 기반 DGPS 서비스를 이용한 동적환경에서의 이동측위를 수행하고 정확도를 평가하였다. GPS 단독측위, NTRIP 기반의 단일기준국 NDGPS 측위, 그리고 지상파 DMB 기반의 가상기준국 DGPS 측위를 동시에 수행하였으며 고정밀 측위 결과와의 비교를 통해 수평오차를 산출하였다. 그 결과 GPS 단독, NTRIP-DGPS, DMB-DGPS 측위의 수평오차가 DMB 송출간격이 3초일 때 2.3m, 1.0m, 0.7m, 1초일 때 2.0m, 1.2m, 0.8m로 나타났다. 이를 통해 해당 서비스를 이용할 경우에 단일기준국 기반의 NDGPS 서비스를 이용하는 경우보다 수평 정확도가 향상되는 것을 확인하였다.

• 한국비블리아학회지
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• 제3권1호
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• pp.39-55
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• 1978

The following results have been driven out from a survey of the actual conditions of the public libraries service in Korea, made through questionnaire in reference with the actual service for youth that are presently done by the foreign countries' libraries, in order to prepare a perfect and objective base in establishing a service activities of the public libraries in this country: (1) It was found that the public libraries' loarning hours during the week days which accords with the schooling hours of the schools are shown to 50 %. On Saturdays during Summer season seven libraries and during Winter season twelve libraries would close their loaning before 17 : 00 hours, and on Holidays and Sundays fifteen libraries are not doing their loarning. (2) The followings are the present status of the service activities for the youth by the public libraries: a. It was found that they do introduction activity (50 %) of newly published books as a service for inducing reading interestings of the youth, and except this it was found that others are on beginning. b. The service activities by the data for the visual and auditory sense are almost negelected. and the rate of doing such activity is shown to 9.74%. c. It has been found that little information service activity is for inducing the youth to the libraries. d. As a cooperative activity with the school's, a passive service activity to have pursuaded to visit the public libraries by each class, are mostly being done (27.27%). Some research meeting for solving all the matters between the school libraries are not held mostly.

• 한국식생활문화학회지
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• 제11권1호
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• pp.13-21
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• 1996

To find out the reference data of the school food service system, I serveyed four primary schools in Seoul, Korea and Nara, Japan respectively. The school children and their parents of whom arbitrary selected two classes among each primary school, were taken the questionaire about the present school food service system and their favorate food. The results were as follows; 1) 74.8% of Korean and Japanese children, and 92.5% of their parents were in favor of school food service. 2) Korean childrin wanted more amount of food and less salty taste. 3) Korean and Japanese children and their parents believed that the school food service system correct children's unbalanced diet. 4) Korean children wished more kinds of foods, western-styled cooking and that the food would be served in warm state. 5) Korean parents wanted that school food service system should be natural and better quality food material, and teacher should educate good eating habit. 6) Korean school children prefer yogurt, cuttle-fish, chicken, bean-curd, tomato, orange, dried laver, sweet potato, pine-mushroom in each food group. In conclusion, school food service system should be enough to meet children's good nutrition status, and the menu would be selected with consideration of children's preference and Korean traditional diet habit. Good table manner and eating all kinds of foods should be targht by school food service system as well as preparing good quality of food.

• 한국초등과학교육학회지:초등과학교육
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• 제40권1호
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• pp.1-12
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• 2021

This study investigated pre-service elementary teachers' understanding of the planetary revolution movement of Mars and their explanatory models to show how the Sun-Earth-Mars system worked. An assessment item set using five celestial maps drawn from the Stellarium was designed to probe pre-service teachers' understanding of the prograde-retrograde motion of Mars. Among 23 participants, only four showed scientifically accurate understanding of Mars movement and drawing correct explanatory models for the planetary movement. Even the pre-service teachers who construed correctly prograde and retrograde motions of Mars showed a clockwise movement model due to their intuitive perceptions of Mars movement data from the celestial maps. Pre-service teachers with poor understanding of planetary movement also showed weak explanatory models due to their limited observation or lower spatial thinking. Although the planetary motion is not an easy topic for pre-service elementary teachers, it can be argued if the alternative approach, such as using appropriate observational data of a planet and changing the frames of reference between Earth-based view and Space-based view, is employed effectively in teaching planetary motion, pre-service teachers can reach the upper level of leaning planetary motion in terms of the planet's revolution.

• 정보관리학회지
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• 제31권4호
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• pp.29-47
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• 2014

본 연구는 J교육대학교 기록관 이용자들을 대상으로 기록정보서비스에 대한 인식 및 경험을 조사하고 이를 바탕으로 서비스 개선방안을 도출하는 것을 그 목적으로 한다. 본 연구는 아카이브 매트릭스 프로젝트(Archival Metrics Project)에서 대학기록관의 기록정보서비스를 평가하기 위해 개발한 이용자 설문지를 수정하여 사용하였으며 이용자들의 기록관에 대한 인식, 이용현황, 직원에 대한 평가, 시설 및 서비스에 대한 만족도 등을 파악하였다. 본 연구는 47명에 대한 이용자 설문 결과와 기록연구사와의 면담결과를 바탕으로 기록관의 서비스 개선방안을 제안하였다.

• 한국문헌정보학회지
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• 제49권4호
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• pp.401-417
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• 2015

질문 분류는 질의응답과정에서 질문자의 정보요구를 이해하고 주어진 질문에 대해 적합한 답변을 제공하기 위한 중요한 방법 중의 하나이다. 이 연구의 목적은 온라인 및 도서관에서 활용 가능한 질의응답 서비스의 질문 분류체계를 조사해보고, 각 질의응답서비스의 유형별로 어떠한 특징이 있는지 살펴보고자 하였다. 이를 위해, 도서관의 참고서비스 및 온라인 상의 소셜 레프런스, 자동 질의응답 시스템을 대상으로 질문을 어떻게 분류하여 활용하고 있는지를 문헌 조사를 통해 살펴보고 종합하여 질문의 유형을 정리하였다.

• 인간식물환경학회지
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• 제22권2호
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• pp.219-229
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• 2019

This study was carried out to verify the accuracy of fitness tracking devices in monitoring heart rate and energy consumption and to contribute to the development of a forest exercise program that can recommend the intensity and amount of forest exercises based on personal health-related data and provide monitoring and feedback on forest exercises. Among several commercially available wearable devices, Fitbit was selected for the research, as it provides Open API and data collected by Fitbit can be utilized by third parties to develop programs. Fitbit provides users with various information collected during forest exercises including exercise time and distance, heart rate, energy consumption, as well as the altitude and slope of forests collected by GPS. However, in order to verify the usability of the heart rate and energy consumption data collected by Fitbit in forest, the accuracy of heart rate and energy consumption were verified by comparing the data collected by Fitbit and reference. In this study, 13 middle-aged women were participated, and it was found that the heart rate measured by Fitbit showed a very low error rate and high correlation with that measured by the reference. The energy consumption measured by Fitbit was not significantly different from that measured in the reference, but the error rate was slightly higher. However, there was high correlation between the results measured by Fibit and the reference, therefore, it can be concluded that Fitbit can be utilized in developing actual forest exercise programs.

• 한국통신학회논문지
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• 제36권5B호
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• pp.471-476
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• 2011

본 논문에서는 최근에 기본 개념이 창안된 개인 환경 서비스(Personal Environment Service: PES)의 시스템과 프로토콜 구조에 대해 확장된 방안이 제안되었다. PES는 스마트폰과 사용자 프로파일을 기반으로 하는 대표적인 모바일 컨버전스 서비스로 그 파급 효과가 매우 크다. 그러나 초기부터 시스템 구조에 대해 충분히 연구되지 않으면 효과적인 실용화 가능성이 낮아진다. 본 논문에서 제안된 PES 서비스 시스템과 프로토콜 구조는 향후 본격적인 연구개발 단계에서 좋은 참조 내용이 될 것이다.

• 전기학회논문지P
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• 제61권2호
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• pp.103-109
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• 2012

This paper analyzed major factors affecting video quality in IPTV (Internet Protocol TV) services in multicasting under our lab network environment similar to practical IPTV service networks. We measured video qualities for the broadcasting traffics in IPTV multicasting with or without applying QoS (Quality of Service) technique. The measurements allowed us to extract thresholds of network measurement factors affecting the quality for the service. It will be a good choice that the factors can be a reference to ensure stable video quality for practical IPTV services in multicasting.