• 로봇학회논문지
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• 제2권1호
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• pp.21-28
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• 2007

The Intelligent Space(ISpace) provides challenging research fields for surveillance, human-computer interfacing, networked camera conferencing, industrial monitoring or service and training applications. ISpace is the space where many intelligent devices, such as computers and sensors, are distributed. According to the cooperation of many intelligent devices, the environment, it is very important that the system knows the location information to offer the useful services. In order to achieve these goals, we present a method for representing, tracking and human following by fusing distributed multiple vision systems in ISpace, with application to pedestrian tracking in a crowd. And the article presents the integration of color distributions into particle filtering. Particle filters provide a robust tracking framework under ambiguity conditions. We propose to track the moving objects by generating hypotheses not in the image plan but on the top-view reconstruction of the scene. Comparative results on real video sequences show the advantage of our method for multi-object tracking. Also, the method is applied to the intelligent environment and its performance is verified by the experiments.

• Journal of Communications and Networks
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• 제11권6호
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• pp.607-614
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• 2009

Recently, Lu et al. proposed an efficient conditional privacy preservation protocol, named ECPP, based on group signature scheme for generating anonymous certificates from roadside units (RSUs). However, ECPP does not provide unlinkability and traceability when multiple RSUs are compromised. In this paper, we make up for the limitations and propose a robust and efficient anonymous authentication protocol without loss of efficiency as compared with ECPP. Furthermore, in the proposed protocol, RSUs can issue multiple anonymous certificates to an OBU to alleviate system overheads for mutual authentication between OBUs and RSUs. In order to achieve these goals, we consider a universal re-encryption scheme and identity-based key establishment scheme as our building blocks. Several simulations are conducted to verify the efficiency and effectiveness of the proposed protocol by comparing with those of the existing ECPP.

• Communications for Statistical Applications and Methods
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• 제13권1호
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• pp.1-10
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• 2006

Many of statistical experimental designs have multiple goals. It is often impractical to use the single-objective criterion for this purpose. It is necessary to modify the existing optimum experimental design criteria. There exist three criteria handling this problem in general: compound, constrained, maxi-min approach. This paper extends Kahng and Kim's idea to develop another approach to incorporate several experimental design criteria in accordance of their importance in practical way. Furthermore this paper investigate its relationship with the maxi-min approach. It shows logically that the often realized infeasibility can be still avoided with the rank of importance of the objectives intact.

• ETRI Journal
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• 제45권5호
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• pp.735-745
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• 2023

This paper surveys recent multiagent reinforcement learning and neural Myerson auction deep learning efforts to improve mobility control and resource management in autonomous ground and aerial vehicles. The multiagent reinforcement learning communication network (CommNet) was introduced to enable multiple agents to perform actions in a distributed manner to achieve shared goals by training all agents' states and actions in a single neural network. Additionally, the Myerson auction method guarantees trustworthiness among multiple agents to optimize rewards in highly dynamic systems. Our findings suggest that the integration of MARL CommNet and Myerson techniques is very much needed for improved efficiency and trustworthiness.

• 한국정보시스템학회지:정보시스템연구
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• 제10권1호
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• pp.27-50
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• 2001

The purpose of this study was to examine some of the most important factors for the development of information systems with today's fast-paced, ever-changing, and exciting information system environment. Especially, it was focused to investigate current information technology related to develop information systems, to find some important problems during the development process, and to suggest solutions for the problems. Case research methodology was used because a natural setting was needed and a focus was on contemporary events for this study. Similarly, research phenomena was not supported by a strong theoretical base. The case was the development of an integrated information systems in a specific university. Multiple-case designs were desirable, but single-case study was used because of limitations of site selection. Multiple data collection methods were employed in this study such as documentation, interviews, and direct observation. Some major problems were found during the system development. First, the schedule to complete a project was delayed over six months. Second, the system did not ensure to align organizational goals and information systems goals based on BPR (Business Process Reengineering). Third, there was a difficulty in evaluating request for proposal (RPR) returns and choosing a vendor. Finally, information technology is changing too fast. So, it was very difficult to get the transparency of new technology The study has suggested a few solutions: top management support, matching If planning with business planning, complete project plan and control, user participation, and training Finally, joint application development (JAD) is strongly recommended, which is a workshop that unites management, IT specialists, and knowledge workers to define and specify the logical requirements and technical alternatives for a proposed system.

• 대한수학교육학회지:학교수학
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• 제19권3호
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• pp.481-494
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• 2017

다중해법 문제는 수학적 창의성 함양에 적합하다고 알려져 왔다. 그런데 학생들이 제시한 다중해법들이 모두 유용하거나 의미 있는지, 학생들이 다중해법을 찾아 나가면서 어떤 사고를 하는지에 대한 연구는 매우 부족하다. 본 연구는 학생들이 제시한 다중해법 간에 질적 차이가 존재하는지, 존재한다면 수학적 창의성의 관점에서 어떤 차이인지를 확인하는 데 목표를 둔다. 이를 위해 영재교육원에 재원 중인 중학교 2학년 학생 8명에게 두 가지 버전의 과제를 제시한 후, 해법 간에 나타난 질적 차이를 분석하였다. 연구 결과, 처음에 제시한 해법과 나중에 제시한 해법 간에 차이가 있었으며, 유연성과 독창성 면에서 질적으로 상당한 차이가 나타났다. 이에 다중해법 문제를 설계하고 적용함에 있어 이와 같은 질적 차이를 고려할 필요가 있음을 결론으로 제시하였다.

• 한국콘텐츠학회논문지
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• 제13권2호
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• pp.488-497
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• 2013

본 연구는 지상, 수상, 항공 레저스포츠 중심의 관광활동 참가자들의 참여정도와 몰입의 관계를 규명하는데 그 목적이 있다. 지상(등산, 골프, 캠핑), 수상(래프팅, 스킨스쿠버, 낚시), 항공(패러글라이딩, 스카이다이빙) 레저스포츠 중심의 관광활동에 참가하는 총 437명의 설문지가 최종 분석에 사용되었다. 수집된 자료를 바탕으로 SPSSWIN 18.0을 이용하여 일원변량분석, 다중회귀분석을 실시하여 다음과 같은 결과를 도출하였다. 첫째, 레저스포츠 중심의 관광활동 유형에 따라 몰입은 명확한 목표, 시간감각 왜곡, 자의식 상실, 도전과 기술의 균형, 자기 목적적 경험, 즉각적인 피드백, 통제감에서 유의한 차이가 있었다. 둘째, 참가 기간과 빈도가 몰입에 정(+)적인 영향을 미치는 것으로 나타났으며, 구체적으로 참가 기간은 도전과 기술의 균형, 명확한 목표에, 참가 빈도는 도전과 기술의 균형, 시간감각 왜곡, 명확한 목표, 자기 목적적 경험, 즉각적인 피드백, 통제감에, 참가 강도는 시간감각의 왜곡, 자기 목적적 경험에 통계적으로 유의한 정의 영향을 미치는 것으로 나타났다.

• International Journal of Quality Innovation
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• 제4권1호
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• pp.131-147
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• 2003

This paper considers that a public department under specialized TQM manpower constraints have to implement multiple total quality management (TQM) policies to promote its service performance (fundamental goal) by adopting a centralized sequential advancement strategy (CSAS). Under CSAS, the decision-makers (DMs) start off by focusing specialized TQM manpower on a single policy, then transfer the specialized TQM manpower to the next policy when the first policy reaches the predetermined implementation time limit (in terms of education and training). Suppose that each TQM policy has a different desirous education and training goal. When the desirous goals for all TQM policies are achieved, we say that the fundamental goal will be satisfied. Within the limitation of total implementation period of time for all policies, assume the desirous goals for all TQM policies cannot be achieved completely. Under this premise, the optimal implementation sequence for all TQM policies must be calculated to maximize the weighted achievement of the desirous goal. We call this optimization problem a TQM case of "centralized sequential decision-making problem (CSDMP)". The achievement of the desirous goal for each TQM policy is usually affected by the experience in prior implemented policies, which makes solving CSDMP quite difficult. As a result, this paper introduces the concepts of sequential effectiveness and path effectiveness. The structural properties are then studied to propose theoretical methods for solving CSDMP. Finally, a numerical example is proposed to demonstrate CSDMP′s usability.

• 한국생활과학회지
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• 제20권1호
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• pp.273-284
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• 2011

The purpose of this study was to investigate the understanding of a multicultural education curriculum(educational goals, contents, methodology, subjects, problems, and revitalization) by college students and its process, to provide base materials to be used in revitalizing an efficient multicultural education. The subjects were 750 college students located in Jeonbuk province. In this statistical analysis, SPSS 12.0 program was used to conduct frequency analysis, credibility analysis, $X^2$ test, t-test, one-way ANOVA, and Duncan' multiple comparison. For the educational goals of multicultural education, most people responded it was "to positively experience cultural diversity and commonality." As for methodology, the paper found that there were two elements, namely, consolidation form and specific form; there were no differences between responses given by different genders, but differences were observed among different grade levels and majors. Looking at the content of multicultural education, emphasis was given to the equality of different cultures. Multicultural education was taught most frequently in Home Economics Education. In conclusion, by focusing on university students, the paper looked at the awareness of multicultural the necessity of multicultural education, and the awareness of the multicultural education process. Above all, in terms of home economics education, there must be more systematic studies on school field education and related educational programs in order to revitalize multicultural education.

• Journal of Information Processing Systems
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• 제5권4호
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• pp.175-186
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• 2009

Power consumed by modern computer systems, particularly servers in data centers has almost reached an unacceptable level. However, their energy consumption is often not justifiable when their utilization is considered; that is, they tend to consume more energy than needed for their computing related jobs. Task scheduling in distributed computing systems (DCSs) can play a crucial role in increasing utilization; this will lead to the reduction in energy consumption. In this paper, we address the problem of scheduling precedence-constrained parallel applications in DCSs, and present two energy- conscious scheduling algorithms. Our scheduling algorithms adopt dynamic voltage and frequency scaling (DVFS) to minimize energy consumption. DVFS, as an efficient power management technology, has been increasingly integrated into many recent commodity processors. DVFS enables these processors to operate with different voltage supply levels at the expense of sacrificing clock frequencies. In the context of scheduling, this multiple voltage facility implies that there is a trade-off between the quality of schedules and energy consumption. Our algorithms effectively balance these two performance goals using a novel objective function and its variant, which take into account both goals; this claim is verified by the results obtained from our extensive comparative evaluation study.