• Smart Structures and Systems
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• 제8권1호
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• pp.107-117
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• 2011

Biological sensory systems continuously monitor and analyze changes in real-world environments that are relevant to an animal's specific behavioral needs and goals. Understanding the sensory mechanisms and information processing principles that biological systems utilize for efficient sensory data acquisition may provide useful guidance for the design of smart-sensing systems in engineering applications. Weakly electric fish, which use self-generated electrical energy to actively sense their environment, provide an excellent model system for studying biological principles of sensory data acquisition. The electrosensory system enables these fish to hunt and navigate at night without the use of visual cues. To achieve reliable, real-time task performance, the electrosensory system implements a number of smart sensing strategies, including efficient stimulus encoding, multi-scale virtual sensor arrays, task-dependent filtering and online subtraction of sensory expectation.

• 대한안전경영과학회지
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• 제3권3호
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• pp.33-44
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• 2001

Needs of each enterprises for safety managers ability should be clarified and then the result should be taken into account regular curriculum and assessed it regularly. Keeping the student competance without this series of feedback will not be possible. A method, to assess the effectiveness of curriculum course, DACUM(Developing A Curriculum) could be applied in order to find out what subject will be useful. Questionnaire results with weight factor could be put into this study Task Analysis method and the importance determining method have been introduced here. As a further study, it is concealed that a study taking into account of company size, nature, local situation are needed to find out more useful application.

• 대한임베디드공학회논문지
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• 제7권4호
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• pp.193-199
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• 2012

Virtualization allows multiple commodity operating systems to share on a single physical machine. Resource allocation among virtual machines is a key to determine virtual machine performance. To satisfy time-sensitive task on a domain, hypervisor needs to observe the resource requirements and allocates proper amount of CPU resources in a timely manner. In this paper, we propose a realtime credit scheduler for latency sensitive application on virtual machines. The key idea is to register a time event in the Xen hypervisor. Experiment result shows that the proposed scheme is superior to Credit scheduler.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.137.1-137
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• 2001

A new method for a guide robot using Real-Time Linux OS is introduced in this paper. A guide robot is to guide people in museums or buildings. So it has to be more reliable and stable in its control system. In addition, it has to satisfy Real-Time operation requirement because it needs to react to changing environment prompty. The task includes localization, map building, collision avoidance, path planning, and user interface software. The modular guide robot is designed with Real-Time Linux OS, which is composed of many open sources for scheduler, interrupt dispatcher, fifos, shared memory, timer services. We developed application software to satisfy the given task. The developed guide robot moves at 0.2ms and the interrupt latency is less than 100$\mu\textrm{s}$ It is thought that the developed system can be a stable and low cost open architecture robot controller for ...

• ETRI Journal
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• 제42권3호
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• pp.388-398
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• 2020

We herein propose a heuristic redundancy selection algorithm that combines resubmission, replication, and checkpointing redundancies to reduce the resiliency overhead in fault-tolerant workflow scheduling. The appropriate combination of these redundancies for workflow tasks is obtained in two consecutive phases. First, to compute the replication vector (number of task replicas), we apportion the set of provisioned resources among concurrently executing tasks according to their needs. Subsequently, we obtain the optimal checkpointing interval for each task as a function of the number of replicas and characteristics of tasks and computational environment. We formulate the problem of obtaining the optimal checkpointing interval for replicated tasks in situations where checkpoint files can be exchanged among computational resources. The results of our simulation experiments, on both randomly generated workflow graphs and real-world applications, demonstrated that both the proposed replication vector computation algorithm and the proposed checkpointing scheme reduced the resiliency overhead.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1996년도 춘계공동학술대회논문집; 공군사관학교, 청주; 26-27 Apr. 1996
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• pp.389-394
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• 1996

The product-user interface for consumer electronic products became complex due to the increased variety of functions corresponding to consumer needs. In this study, three types fo design improvement of the menu interface for a video cassette recorder is studied. Three modifications to an existing menu interface was designed using the semantic, the syntactic and the lexical design factors. A series of the validation experiments was performed to test the effect of the three types of task modifications. The results showed that performance time, number of errors and learning effect were improved for all task modification. It also showed that the performance improvement effect of the semantic factors was 8.8%, that of the syntactic factors was 5.9% and that of the lexical factors was 5.6% respectively. It was found out that the performance improvement effect of the semantic design factors were relatively more significant than the syntactic and the lexical design factors.

• 한국국방경영분석학회지
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• 제29권1호
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• pp.57-75
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• 2003

Policy-based networking offers a network manager the ability to manage the network in a holistic and dynamic fashion rather than force a network manager to manage the network by dealing with each device individually. Policy-based networking is focusing on users and applications instead of emphasizing devices and interfaces. An important part of the policy-based networking is to simplify the task of administration and management for different disciplines. The Defense Information System(DIS) of today are complex and heterogeneous systems. Operational needs are not a trivial task and Quality of Service(QoS) is not generally guaranteed. So, important data may be missed or congested by trivial data. Policy-based networking provide a way to support QoS and simplify the management of multiple devices deploying complex technologies. This paper suggest implementation of policy-based networking in DIS to improvement of performance, and implementation is progressed step by step. Especially this paper is focusing on the providing QoS with policy-based networking using Lightweight Directory Access Protocol(LDAP) Server.

• 과학교육연구지
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• 제40권1호
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• pp.52-71
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• 2016

이 연구의 목적은 문화역사적 활동이론을 통하여 무성생식 학습용 어플리케이션을 활용한 특수교육 대상 중학생들의 학습활동을 분석하는 것이다. 이를 위해 특수교육 대상 학생들을 위한 무성생식 학습용 어플리케이션을 개발하였고, 이 어플리케이션을 이용한 학습 활동을 문화역사적 활동 이론 측면에서 분석하였다. 무성생식 학습 어플리케이션은 무성생식 탐구학습에 활용하기 위한 학습 보조 자료로서 개발되었다. 그리고 어플리케이션의 주요 기능은 개념학습 기능, 문제풀이 기능, 학습 관련 동영상 플레이 기능, 그리고 무성생식 관찰 보고서 작성 기능으로 구성되었다. 문화역사적 활동이론을 통해 분석한 결과, 주체인 특수교육 대상 학생들은 도구의 어플리케이션을 통해 수업에 적극적으로 참여하려하는 객체(목적)를 가지고 협동학습을 위한 분업을 하게 되었다. 결과적으로 학생들은 산출물로 무성생식 개념을 효율적으로 학습 하게 되었다. 이와 같은 연구 결과는 어플리케이션을 활용한 수업이 특수교육 대상 학생들의 학습 성취와 과제수행행동을 향상시키는데 긍정적인 영향을 미치는 방법임을 제시한다.

• 정보관리학회지
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• 제38권2호
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• pp.305-336
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• 2021

본 연구는 대학도서관의 서비스 개발을 위해 대학을 둘러싼 환경에 대한 인식에 기반하여 이용자가 가진 정보요구와 정보행위를 탐색하였다. 질적 데이터의 내용분석 결과, 심층면담 참여자들은 사회, 교육, 연구 환경의 변화를 경험하면서, '적합성, 최신성, 고유성, 신뢰성, 현장성, 편의성'의 6가지 특성을 띠는 심층적 정보요구를 갖고 있었다. 참여자들은 정보요구를 해결하기 위해 정보매체와 인적자원, 그리고 장소매체를 활용하고 있었다. 이러한 정보행위를 수행하는 가운데, 참여자들의 신분이나 주제분야, 소속대학을 뛰어넘어 공통적으로 겪고 있는 정보문제로서 '개개인의 미디어·정보활용역량 차이, 대학간 자원인프라 격차, 저작권과 소통채널의 문제' 등을 발견하였다. 이에 본 연구는 대학도서관서비스 방향성으로 '개인화된 미디어·정보리터러시 서비스, 정보요구 특성에 부합하는 장소매체로서의 도서관, 인적교류장소로서 자원인프라플랫폼, 접근성 높은 정보매체 활용지원 서비스'를 제시하였다.

• 한국실천공학교육학회논문지
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• 제3권2호
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• pp.158-165
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• 2011

본 연구는 직업능력개발 분야의 중추적인 역할을 수행하는 직훈기관의 최고관리자 교육프로그램을 개발하기 위해서 교육요구분석 차원에서 직훈기관장의 역량을 추출하여 역량모델을 개발할 목적으로 수행되었다. 조사대상은 전국의 공공직훈기관, 민간직훈기관, 학원 및 기타 평생교육기관의 최고관리자로서, 주요조사 내용은 교육요구조사와 역량모델에 관한 이론적 고찰, 직훈기관장의 직무분석, 잠정적으로 정리한 역량에 대한 설문문항에 대한 중요도, 숙달수준, 학습 희망도를 통해 역량의 우선순위의 파악과 이에 기초한 교육요구의 우선순위를 산정하였다. 연구방법은 설문조사, FGI, 현장조사 등의 연구방법이 적용되었다. 교육역량모델에 기반한 교육훈련요구 분석결과 그 우선순위가 높은 역량은 '인재확보능력', '시장변화 및 교육생의 요구파악', '문제해결능력', '리더십 스킬', '창의적 사고', '조직역량분석 및 진단', '정보수집 분석능력' 등이다.