• 정보교육학회논문지
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• 제14권1호
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• pp.13-23
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• 2010

정보화 시대의 개인의 개성과 창의력은 지식산업에 요구되는 시대적 요청이다. 로봇 프로그래밍 교육이 학습자의 창의성 신장의 측면에 있어 의미 있는 효과가 있는 것으로 알려지고 있다. 기존의 로봇프로그래밍 도구들은 텍스트 기반 혹은 GUI 기반 저작도구기능을 가지고 있다. 그러나 대부분의 프로그래밍 도구들은 상호작용기능이 없는 단순한 튜토리얼을 제공하고 있는 실정이다. 본 연구에서는 웹 2.0의 상호작용 기술을 응용하여, 협력 코드 생성이 가능한 로봇 프로그래밍 교육 시스템을 연구하였다. 시스템이 제공하는 협력코드 생성기능을 통해 학습자들은 협력하여 로봇 프로그래밍을 생성하는 경험을 할 수 있다. 또한 학습자들은 지식공유 기능을 활용하여 효과적인 프로그램 디자인의 경험과 소스코드의 공유가 가능하다.

• 한국수자원학회논문집
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• 제32권5호
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• pp.525-535
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• 1999

유역내의 수력 에너지자원과 수자원의 효율적 관리를 위하여 통합혼합정수계획법(combined mixed integer proguamming)을 사용한 최적 발전기 운영계획 모형을 개발하였다. 통합혼합정수계획법 모형은 기왕에 개발된 혼합정수계획법 모형에서 발생할 수 있는 모순을 해결하기 위하여 개발되었다. 또한, 조건부 제약조건과 택일 제약조건들을 선형계획법 모형에서 사용 할 수 있도록 수정하는 기법을 제안하였다. 미국 콜로라도강 하부유역에 통합혼합정수계획법을 적용한 경우를, 최적화 모형을 사용하지 않은 경우 및 혼합정수계획법을 사용한 경우와 비교한 결과, 최적화 기법을 사용하지 않은 경우보다 유역효율이 0.67% 증가하였고, 혼합정수계획법을 사용한 경우보다 유역효율이 1.53% 감소하였다. 통합혼합정수게획모형의 효율이 감소한 이유는 혼합정수계획법모형보다 전력요구량과의 허용오차를 감소시켰기 때문인 것으로 판단된다.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• 제4B권1호
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• pp.29-35
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• 2004

Locomotive scheduling in railway systems experiences many difficulties because of the complex interrelations among resources, knowledge and various constraints. Artificial intelligence technology has been applied to solve these scheduling problems. These technologies have proved to be efficient in representing knowledge and rules for complex scheduling problems. In this paper, we have applied the CSP (Constraints Satisfaction Problems) programming technique, one of the AI techniques, to solve the problems associated with locomotive scheduling. This method is more effective at solving complex scheduling problems than available mathematical programming techniques. The advanced locomotive scheduling system using the CSP programming technique is realized based on the actual timetable of the Saemaul type train on the Kyong-bu line. In this paper, an overview of the CSP programming technique is described, the modeling of domain and constraints is represented and the experimental results are compared with the real-world existing schedule. It is verified that the scheduling results by CSP programming are superior to existing scheduling performed by human experts. The executing time for locomotive scheduling is remarkably reduced to within several decade seconds, something requiring several days in the case of locomotive scheduling by human experts.

• 한국항행학회논문지
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• 제17권3호
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• pp.346-353
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• 2013

소프트웨어 개발의 주요 동향 중 하나는 소프트웨어 산업의 세계화에 있다. 글로벌 소프트웨어 개발은 여러 가지 문제에 직면해 있다. 이러한 문제를 해결하기 위해 새로운 소프트웨어 개발 방법론과 프로세스가 필요하다. 최근 XP 동향에서의 개발 단계로 본다면 기존의 개발자와 개발자간의 협업을 위한 도구에서 벗어나 조직 구성원 전체가 협업할 수 있는 시스템이 필요하다. 텍스트 기반의 IDE 플러그인 형태나 단순한 화면공유, 채팅 기능을 제공하는 것이 아닌 구성원 전체가 협업할 수 있는 분산 페어 개발을 지원하는 시스템의 설계하고 개발하였다.

• 한국철도학회논문집
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• 제8권5호
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• pp.391-397
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• 2005

In this paper we present a model for the maintenance routing construction and the trainset allocation (maintenance routing problem). The model solves the maintenance routing problem using column generation algorithm which was used to combine constraint programming and linear programming. Ilog-cplex was used to solve the linear programming model and Ilog-solver was used to solve the constraint programming model. The computational experience is also provided.

• 산업경영시스템학회지
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• 제18권34호
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• pp.185-191
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• 1995

In this research, a mathematical programming model is developed for the economic modeling of sampling plans based on two evaluation criteria : the outgoing quality and the average total inspection cost A fuzzy goal programming model and its solution procedure are proposed for the managers whose management objectives on the two evaluation criteria are not rigorous. To study the sensitivity of quality characteristic dependence on the resulting inspection plans, a numerical example is solved several times for a dependent model.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -1
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• pp.250-253
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• 2002

We have implemented an interactive multimedia education system for C programming. The system consists of two pars. One is multimedia contents to help students better understand C language syntax, programming style, and program logic and the other is a web-based compilation support system that compiles C programs at the server side which are submitted trough Web by students and returns their execution results to the students' PC. Although there are currently some restrictions that students should replace the inputs functions such as scanf(), getc() and getch() with assignment statements or fscanf(fp, , ), since the system has been implemented using general web technologies and shareware C compiler, the education system could be one solution that education institutions seek to reduce annual immense expenditure of money on C complier.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.40-43
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• 1996

An off-line programming, OLP, system is widely used in automation fines. To help an on-line robot system to carry out desirable tasks planned by the off-line simulation, an approach to the real-time communication is presented. The OLP system developed consists of a software, a host computer(PC), a SCARA robot body, four servo drivers, and four independent joint controllers. This study focuses on the software where real-time communication is included. The software, can be used in teaching, trajectory planning, real-time running, and performance evaluation. The evaluation of different control algorithms is one of the merits of the software. The software can give servo commands for task running. A comparison of generated and corresponding actual trajectories provides the evaluation of task performance. The safety, of the OLP system is ensured by alarming malfuntions of the system. The OLP system developed can reduce the teaching time and increase the user's convenience.

• 대한교통학회지
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• 제13권1호
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• pp.83-94
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• 1995

Many taxis called "Mobum" in Seoul are empty and waiting along the curb during the day time. However, it is almost impossible for elderly and handicapped people, and women carrying babies to use them .It is because they can not serve passengers who request services by phone. If taxis, expecially "Mobum" taxis which offer high quality services, can be dispatched based on requests by phone, not only elderly and handicapped people but also auto commuters will easily call and use them. This paper shows a taxi dispatching system. The system minimizes the total empty vehicle hours under given number of empty vehicles and passengers and their locations. As a result, the system maximizes number of services and revenue under given number of taxis. The system adopts a well -known linear programming model and the model can fast and easily be solved by PC level linear programming packages. Also, practical solutions of the system's constraints such as size and travel time forecast are discussed.ecast are discussed.

• 한국컴퓨터정보학회논문지
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• 제20권6호
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• pp.151-159
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• 2015

In traditional programing education, computers were used as the main tool. Consequently, it was problematic to provide education in an environment without computers or for learners without computer skills. To address this problem, this study developed and validated an unplugged robot education system capable of computerless programming education. The key feature of the proposed system is that programing can be done only by connecting programming blocks in symbols of a flow chart with built-in commands. Validation of the system was performed by a specialist group. Validity was very high with values of content validity ratio (CVR) over 0.7 in all evaluation criteria except "Ease of error debugging" and "Linkages to educational curriculum," whose CVR values were each 0.6. Future directions include improvement in the two areas that scored lower than the others did by, respectively, system improvement to support debugging in error conditions that may occur during the programming process, and development of user guide to support linkages to educational curriculum.