• 전자공학회논문지
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• 제50권12호
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• pp.141-149
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• 2013

본 논문은 멀티 코어 프로세서 기반의 영상 감시 시스템을 위한 침입 탐지 처리의 가속화를 제안한다. 침입 탐지 처리의 가속화를 위해 병렬화를 진행하였고, 이를 위해 기존 침입 탐지 알고리즘을 분석하고 데이터 의존성을 고려하여 프레임 단위의 병렬화된 처리 구조를 설계하였다. 병렬화된 침입 탐지 처리의 유효성을 검증하기 위하여 다중 쓰레드 기반의 프로그램으로 구현하여 침입 탐지의 가속화 정도를 측정하였다. 구현한 침입 탐지 처리 프로그램의 탐지 속도는 논리적 쓰레드를 8개까지 구현할 수 있는 환경에서 기존 단일 쓰레드 처리 대비 최대 353.76%가 향상되었다.

• 한국컴퓨터정보학회논문지
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• 제19권12호
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• pp.359-368
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• 2014

프로세스 동기화는 학생들이 운영체제 과목에서 가장 어려워하는 주제 중 하나이다. 한 번에 한 가지만을 생각하는 인간의 특성 상 여러 사건이 동시에 일어나는 병행 프로세스 환경을 이해하기 어렵기 때문이다. 유한버퍼 문제나 식사하는 철학자 문제 등 고전적 동기화 예제는 그 내용이 너무 기술적이거나 비현실적이기 때문에 운영체제를 처음 접하는 저학년 학생들의 관심과 이해를 이끌기 어려웠다. 본 논문에서는 이러한 고전적 동기화 예제의 대안으로 은행계좌 문제의 사용을 제안한다. 은행계좌 문제는 쉽고 현실적이며 일상생활에서 누구나 경험해 본 문제이기 때문에 학생들의 높은 이해와 흥미를 이끌 수 있었다. 프로세스 실행 순서의 제어, 경쟁조건으로 인한 잘못된 결과의 발생, 세마포어 사용, 교착상태, 모니터 등 다양한 동기화 주제에 대한 은행계좌 문제의 적용에 대해 연구하였다.

• Journal of Information Processing Systems
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• 제11권3호
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• pp.370-388
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• 2015

The localization of multi-agents, such as people, animals, or robots, is a requirement to accomplish several tasks. Especially in the case of multi-robotic applications, localization is the process for determining the positions of robots and targets in an unknown environment. Many sensors like GPS, lasers, and cameras are utilized in the localization process. However, these sensors produce a large amount of computational resources to process complex algorithms, because the process requires environmental mapping. Currently, combination multi-robots or swarm robots and sensor networks, as mobile sensor nodes have been widely available in indoor and outdoor environments. They allow for a type of efficient global localization that demands a relatively low amount of computational resources and for the independence of specific environmental features. However, the inherent instability in the wireless signal does not allow for it to be directly used for very accurate position estimations and making difficulty associated with conducting the localization processes of swarm robotics system. Furthermore, these swarm systems are usually highly decentralized, which makes it hard to synthesize and access global maps, it can be decrease its flexibility. In this paper, a simple pyramid RAM-based Neural Network architecture is proposed to improve the localization process of mobile sensor nodes in indoor environments. Our approach uses the capabilities of learning and generalization to reduce the effect of incorrect information and increases the accuracy of the agent's position. The results show that by using simple pyramid RAM-base Neural Network approach, produces low computational resources, a fast response for processing every changing in environmental situation and mobile sensor nodes have the ability to finish several tasks especially in localization processes in real time.

• 대한수학교육학회지:수학교육학연구
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• 제9권1호
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• pp.263-278
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• 1999

Computer with various powerful functions has profound potential for mathematics instruction and learning. As computer technology progress, its applicability to mathematics education become more comprehensive. Not only its functional development but various psychological positions also changed the way computer technology utilized in mathematics education. In behaviorist's perspective, computer viewed as a teaching machine and constructivist viewed computer as microworld where students could explore various mathematical contents. Both theoretical positions emphasized individual aspect of learning because behaviorist tried to individualize learning using computer and constructivist focused on the process of individual construction. But learning is not only a individual event but also a social event. Therefore we must take social aspect into account. This is especially important when it comes to computer based learning. So far, mathematics loaming with computer weighed individual aspect of loaming. Even in microworld environment, learning should be mediated by teacher and collaborative learning activities. In this aspect, the roles of teacher and peers are very important and socio-cultural perspective sheds light on the computer based learning. In socio-cultural perspective, the idea of scaffold is very important in learning and students gradually internalize the social dimension and scaffolding is gradually faded. And in the zone of proximal development, teacher and more competent peers guide students to formulate their own understanding. In sum, we must take following points into account. First of all, computer should not be viewed as a medium for individualized teaming. That is, interaction with computer should be catalyst for collaborative activities with peers. So, exploration in computer environment has to be followed by small group activities including small group discussion. Secondly, regardless of the role that computer would play, teacher should play a crucial role in computer based learning. This does not mean teacher should direct every steps in learning process. Teacher's intervention should help student construct actively. Thirdly, it is needed to conceptualize computer in learning situation as medium. This would affect learning situation and result in the change of pre-service and in-service teacher training. Computer to be used effectively in mathematics classroom, researches on assessment of computer based learning are needed.

• International Journal of Computer Science & Network Security
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• 제22권8호
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• pp.25-34
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• 2022

Today, further education of adults in the UK is one of the developing areas of continuing education. The Open University with distance learning, in the process of which innovative forms and methods based on computer and telecommunication technologies are used, is particularly successful in the organization of additional education of the adult population. The advantages of distance learning, multimedia - the latest information technologies, which provide the combination of graphic images, video, sound with the help of modern computer tools, are noted. The basic principles and forms underlying the technologies and forms of work with the elderly are defined. The international experience of implementing "Universities of the Third Age" is summarized. The most widespread approach in adult education in Great Britain is informational. The use of computer technologies motivates a new paradigm in educational methods and strategies, which requires new approaches, forms of learning, and innovative ways of delivering educational materials to adult learners. Information technologies have gained great popularity in such activities as distance learning, online learning, assistance in the education management system, development of programs and virtual textbooks in various subjects, online search for information for the educational process, computer testing of students' knowledge, creation of electronic libraries, formation of a single scientific electronic environment, publication of virtual magazines and newspapers on pedagogical topics, teleconferences, expansion of international cooperation in the field of Internet education. The information technology of synchronous distance learning "online" has gained considerable popularity in the educational process today. A promising direction is the use of multimedia technologies in educational activities to create a design of a virtual computer environment by decoding audiovisual information.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권4호
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• pp.595-617
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• 2010

This paper proposes a novel of a personalized Computer Assisted Language Learning (CALL) system based on learner's cognitive abilities related to foreign language proficiency. In this CALL system, a strategy of retrieval learning, a method of learning memory cycle, and a method of repeated learning are applied for effective vocabulary memorization. The system is designed to offer personalized learning based on cognitive abilities related to the human language process. For this, the proposed CALL system has a cognitive diagnosis module which can measure five types of cognitive abilities. The results of this diagnosis are used to create dynamic learning scenarios for personalized learning and to evaluate user performance in the learning. This system is also designed in order to have users be able to create learning word lists and to share them simply with various functions based on open APIs. Additionally, through experiments, it has shown that this system helps students to learn English vocabulary effectively and enhances their foreign language skills.

• 디자인학연구
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• 제11권1호
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• pp.229-236
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• 1998

컴퓨터가 컬러 색 체계를 갖게됨에 따라 컴퓨터 그래픽스는 중요한 기술적 진보를 이루게 되었다. 그러나 컴퓨터에서 구현되는 색 체계는 컴퓨터 모니터 상에서 빛으로 존재하기 때문에 인쇄 잉크나 물감에 의한 기존의 색 체계와는 전혀 다른 구조로 되어 있다. 따라서 기존의 디자인 프로세스나 사진에서의 색 재현이나 호환성에 여러 문제가 제기되고 있다. 컴퓨터에 의해 디자인 프로세스가 통합되어 조절, 관리되는 현재의 디자인 시스템에서는 정확한 색의 재현과 관리는 매우 중요하다고 할 수 있다. 본 연구는 기존의 색 체계의 역할과 그 기능을 고찰하고, 컴퓨터 그래픽스에 있어 컴퓨터 색 체계의 특성을 전통적인 색 체계와 비교, 분석하여 컴퓨터의 기술적인 표현이 가져다주는 조형적 특성을 고찰함으로써 컴퓨터를 이용한 재현과 디자인 프로세스의 새로운 가능성을 탐구하는데 그 목적이 있다.

• Journal of information and communication convergence engineering
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• 제9권4호
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• pp.379-384
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• 2011

The scope of the problems that could be solved by monitoring and the improvement of the recognition time is directly correlated to the performance of the management function of the business process. However, the current monitoring process of business activities decides whether to apply warnings or not by assuming a fixed environment and showing expressions based on the design rules. Also, warnings are applied by carrying out the measuring process when the event attribute values are inserted at every point. Therefore, there is a limit for distinguishing the range of occurrence and the level of severity in regard to the new external problems occurring in a complicated environment. Such problems cannot be ed. Also, since it is difficult to expand the range of problems which can be possibly evaluated, it is impossible to evaluate any unexpected situation which could occur in the execution period. In this paper, a process-evaluating model based on the goal scenario is suggested to provide constant services through the current monitoring process in regard to the service demands of the new scenario which occurs outside. The new demands based on the outside situation are analyzed according to the goal scenario for the process activities. Also, by using the meta-heuristic algorithm, a similar process model is found and identified by combining similarity and interrelationship. The process can be stopped in advance or adjusted to the wanted direction.

• 한국정밀공학회지
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• 제19권2호
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• pp.177-186
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• 2002

This paper describes a research work on the development of computer-aided design system far the deep drawing & ironing of high pressure gas cylinder. An approach to the design system is based on the knowledge-based rules. Knowledge for the system is formulated from plasticity theories, handbook, experimental results and the empirical knowledge of field experts. This system has been written in AutoLISP on the AutoCAD Rl4.0 using personal computer. This system is composed of three modules which are input. process design and drawing.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.153-156
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• 2005

Real-time monitoring and controlling manufacturing process is important because of the unexpected events. When unexpected event like mechanical trouble occurs, prior plan becomes unacceptable and a new schedule must be generated though manufacturing schedule is already decided for order. Regenerating the whole schedule, however, spends much time and cost. Thus automated system which monitors and controls manufacturing process is required. In this paper, we present a system which uses radio-frequency identification and computer vision system. The system collect real-time information about manufacturing conditions and generates new schedule quickly with those information.