• The Journal of Korean Association of Computer Education
• /
• v.8 no.6
• /
• pp.75-83
• /
• 2005

In this paper we studied English listening and speaking test part of foreign language using web and VoiceXML-based education testing system, which is irrespective of time and space. The testing system interface based on VoiceXML consists of user registration module, testing module, and testing result module. User registration module registers user's name and ID, password in user database, and when a tester calls for testing, the User listens to the telephone sound supported by vxml scenario. After that, if a tester logs in, the tester is verified, In the VoiceXML-based education testing system, the manager can reduce time and effort for gaining testing result. The tester listens to the voice by scenario supported by VoiceXML markup language using wire/wireless telephone at any time or anywhere and can improve the effect of foreign language studying by valuating in voice directly. verified. In the VoiceXML-based education testing system, the manager can reduce time and effort for gaining testing result. The tester listens to the voice by scenario supported by VoiceXML markup language using wire/wireless telephone at any time or anywhere and can improve the effect of foreign language studying by valuating in voice directly.

• Proceedings of the Korean Information Science Society Conference
• /
• 2011.06b
• /
• pp.395-397
• /
• 2011

RT-eCos3.0은 대표적 분산 실시간 객체 모델인 TMO(Time-triggered Message-triggered Object)의 실행을 제공하기 위하여 공개소스 eCos3.0 기반으로 개발된 초경량 경성 실시간 임베디드 운영체제이다. RT-eCos3.0에서는 그간 스레드의 최장 수행 시간 입력이 필요 없는 EDF 및 FIFO 스케줄러를 지원하여 왔다. 본 논문에서는 TMO의 시간 구동 스레드와 메시지 구동 스레드의 스레드 등록 시 최장 수행 시간을 입력 받아 이를 기반으로 마감시간까지의 수행시간 대비 잔여시간을 이용하는 LLF (Least Laxity First) 스케줄러를 클럭 인터럽트 핸들러 내에 구현하고 각 스레드로 하여금 스케줄링 정책을 선택할 수 있도록 구현하였다.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
• /
• 2008.10a
• /
• pp.100-105
• /
• 2008

EPCglobal은 기업 간의 물류 활동 촉진과 글로벌 유통물류 시스템 구축을 위하여 EPCglobal Architecture Framework을 제시 하였다. EPCglobal Architecture Framework의 한 구성 요소인 EPCIS(Electronic Product Code Information Services)는 EPC, 시간, 위치와 같은 물류 관련 정보에 대해 저장 및 검색 서비스를 제공한다. EPCIS는 단발성 질의(poll)와 연속 질의(subscribe) 검색 서비스를 제공한다. EPCIS의 연속 질의는 시스템 자동화 및 재고 관리, 공급망 관리를 위해 다양한 응용에서 활용이 가능하다. 일반적으로 연속 질의 처리를 위해서는 등록된 연속 질의와 입력된 데이터를 순차적으로 비교하는 Sequential Matching 기법을 사용한다. Sequential Matching기법은 등록된 연속 질의 수가 증가 할 경우 많은 부하를 발생 시키고, 이로 인해 시스템 처리 지연이 발생한다. 본 논문에서는 EPCIS의 시공간 EPC 데이터의 연속질의 처리 성능 향상을 위해 선택률 기반 효율적인 연속질의 처리 기법을 제안한다. 13차원의 도메인을 여러 개의 질의 색인으로 구성하고, 등록된 질의 정보를 기반으로 선택률을 계산한다. 선택률에 의해 변경되는 동적 질의 실행 계획을 제안함으로써, EPCIS에서 시공간 EPC 데이터의 연속질의 처리에 대해 평균 60%의 성능이 향상이 가능하도록 하였다.

• Journal of Korean Society of Archives and Records Management
• /
• v.7 no.1
• /
• pp.145-170
• /
• 2007

Unlike paper records, accessing electronic records needs to be supported by specific combination of hardware and software. The electronic records have longer life span than the storage media, hardware, software and the formats that were used for the production of such records. Because the quality of electronic record can become deteriorated as time goes on, we need to have appropriate mechanisms to secure the long-term preservation and access to the digital information at a certain point in the future. Based on this reality, this study proposes the functions and the development method of the format registry, which efficiently supports the preservation strategy such as migration and emulation, collecting and managing technical information elements. These elements consist of the foundation of the long-term preservation of the electronic records.

• Proceedings of the Acoustical Society of Korea Conference
• /
• autumn
• /
• pp.97-103
• /
• 2001

The speaker recognition method using DTW algorithm has the problem that is reducing the performance of the speaker recognition system as the time variation. So there are many proposed algorithms to solve these problems. This paper proposes the new method If make the reference pattern that is acceptable to intra-speaker variation by reference pattern normalization. And to avoid reducing performance of speaker recognition system, we use the modified reference pattern to recognize the system user. The used methods in this paper are VQ and DTW. As the result of simulation we can obtain the $97.5\%$ of recognition accuracy rate.

• The Journal of the Korea Contents Association
• /
• v.9 no.9
• /
• pp.226-234
• /
• 2009

This study aims to research the influencing factors of field education outcome. This study is to help the social welfare subject find out the field education orientation. Following is the result brought out from the research. First, it was found that the evaluation of field manager, field agency and field education outcome working in social welfare agencies had no meaningful statistical difference. Second, the results of regression analysis showed that the evaluation of field manager and field agency had influenced on field education outcome. Along with major of the study, implications for expanding opportunities of continuing educations for managers in non-profit organization are discussed.

• The Journal of Korean Society for Radiation Therapy
• /
• v.29 no.2
• /
• pp.119-128
• /
• 2017

Purpose: The purpose of this study was to measure the average actual treatment time at the time of Tomotherapy treatment. We want to investigate the time required for the procedure in the treatment process that affects the actual treatment time. Patients and Methods: We measured the time required by the procedure in 31 patients who were treated with tomography therapy. Beam-on time, Image registration time, Set-up with scan time and Actual treatment time were measured and stepwise regression analysis was performed. Result: The average treatment time per a patient was 21.44 - 23.92 minutes. Beam-on time, Image registration time, and Set-up with Scan time were the important factors affecting the actual treatment time. The biggest influence was Beam-on time and Registration time was less affected by analysing. Conclusion: The average treatment time per a patient in tomotherapy treatment was $22.68{\pm}3.37$ minutes. The Approximately 21 patients are expected to be treated within 8 hours of regular work time. However, if the treatment is interrupted or the time of the procedure is changed during the treatment process, it affects the schedule of the daily treatment patients and the workload is expected to increase.

• Journal of KIISE:Information Networking
• /
• v.32 no.3
• /
• pp.370-381
• /
• 2005

Mobile IP provides an efficient and scalable mechanism for host mobility within the Internet. Using Mobile If, mobile nodes may change their point of attachment to the Internet without changing their If address. However, it would result in a high signaling cost. To reduce the signaling cost, we factor in the fact that mobile users will not be actively communicating much of the time. In fact, there Is no necessity to send a binding update message to the home agent when an mobile node does not communicates with others while moving. From this point of view, we propose a lazy update strategy for minimizing signaling cost using the forwarding pointer in hierarchical Mobile IPv6. In our proposal, binding updates are sent only when a mobile node is in a busy mode. If an mobile node is in a dormant mode, binding update messages are delayed until busy mode using the forwarding pointer. As a result, our proposal can reduce the total signaling cost by eliminating unnecessary binding update messages when a mobile node Is in a dormant mode. In addition to, our proposal reduces unnecessary location update cost resulting from ping-pong effect under mobile node's dormant mode. Analysis results using the discrete analytic model presented in this paper shows that our proposal can has superior performance than hierarchical Mobile nv6 when the call-to-mobility ratio is low and the length of the forwarding pointer chain K is low.

• Digital Contents
• /
• no.10 s.161
• /
• pp.88-89
• /
• 2006

다른 게임 장르에 비해 RPG란 장르는 상대적으로 유저의 평균체류시간이 길다. 이는 RPG의 특성상 FPS나 RTS장르처럼 단판 위주의 게이미 아니라 광활한맵을 이동하면서 사냥과 퀘스트가 끊임없이 반복되기 때문이다. 그러나 같은 RPG라 할지라도 게임마다 특성이 다르기 때문에 평균체류시간은 다르게 나타나고 있다.현재까지 게임마다 평균체류시간이 다르게 나타난다는 것은 잘 알려진 사실이다. 그러나 이에 대한 원인분석이나 체계적인 연구가 부족했던 것 또한 사실. 이는 RPG장르 내 어떤 요인들이 평균체류시간에 영향을 미치는가에 대한 실증분석이 전무한 상태에서 막연한 '감' 에 의한 평가가 대부분이었기 때문이다. 여기서는 지난 5월 30일을 기준으로 게임트릭스에 등록된 86개의 MMORPG중에서 이미 서비스가 종료됐거나 과거 1년 동안 갑작스럼 패치, 업그레이드등으로 데이터 손실이 많았던 게임, 그리고 데이터를 구할 수 없었던 게임들을 제외한 총 51개의 MMORPG를 대상으로 평균체류시간을 분석했다.

• Journal of KIISE:Computer Systems and Theory
• /
• v.37 no.1
• /
• pp.35-42
• /
• 2010

Guest operating systems running over the virtual machines share a variety of resources. Since CPU is allocated in a time division manner it consequently leads them to having the unknown physical time. It is not regarded as a serious problem in the server virtualization fields. However, it becomes critical in embedded systems because it prevents guest OS from executing real time tasks when it does not occupy CPU. In this paper we propose a hypercall to register a timer service to notify the timer request related real time. It enables hypervisor to schedule a virtual machine which has real time tasks to execute, and allows guest OS to take CPU on time to support real time. The following experiment shows its implementation on Xen-Arm and para-virtualized Linux. We also analyze the real time performance with response time of test application and frames per second of Mplayer.