• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2002.11a
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• pp.520-532
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• 2002

A new architecture called the Storage Area Network(SAN) was developed in response to the requirements of high availability of data scalable growth and system performance. In order to use SAN more efficiently, most SAN operating systems support storage virtualization concepts that allow users to view physical storage devices attached to SAN as a large volume virtually. A logical volume manager plays a key role in storage virtualization. In order for mapping managers to process snap-shots and reorganizations, an efficient freespace manager is required, and it affects the overall performance of logical volume. In this thesis, we design and implement a freespace manager for logical volume manager. The freespace manager efficiently allocates physical blocks for logical blocks. Also, it processes space allocation requests for suports snapshots and reorganizations.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06c
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• pp.138-143
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• 2008

RFID 기술은 기존의 바코드 기술보다 발전된 무선의 비접촉 인식 기술로서, 유비쿼터스 컴퓨팅의 핵심기술로 간주되고 있다. RFID 태그는 기존의 단순한 사물의 인식 기능 중심에서 사물의 상태 및 환경 정보를 감지할 수 있는 센서 태그로의 발전으로 물류 프로세스의 양적, 질적 향상을 도모할 수 있게 되었다. 센서 태그는 환경 정보를 센싱하기 위하여 배터리를 내장하고 있으며, RF Transceiver의 내장 유무에 따라 자체적으로 신호를 보낼 수 있는 active 센서 태그와 리더로부터의 신호를 사용하는 semi-passive 센서 태그로 구분된다. Semi-passive 센서 태그는 배터리를 부착함으로써 passive 태그에 비해 인식률과 인식거리가 향상되었고 active 태그에 비해 단가가 매우 저렴하여 센서 태그가 부착된 물품의 상태를 모니터링하고 환경을 감시하는 다양한 응용에 사용될 수 있다. 이러한 응용의 요구에 따라 Edge Manager는 기존의 passive 태그는 물론 센서 태그를 지원함으로써 상위 응용에게 정제된 결과를 전달할 필요성이 있다. 본 논문에서는 특히 semi-passive 센서 태그를 지원하는 Edge Manager의 설계를 위하여, 센서를 사용한 또 다른 활용 분야인 센서 네트워크에서의 질의 유형을 분석하고, semi-passive 센서 태그의 특징을 고려한 요구사항을 분석한다. Semi-passive 센서 태그는 센서 네트워크의 센서 노드와는 달리 태그 레벨에서 필터링과 병합을 수행할 수 없으므로 Edge Manager에서 이러한 기능이 제공되어야 한다. 본 논문에서는 Edge Manager에서의 센서 태그 데이터에 대한 질의를 위한 방법으로 EPCglobal ALE 표준명세의 ECSpec을 확장하는 방법을 제안하고, 센서 태그 데이터의 특성을 고려한 필터링 기법과 병합(aggregation) 기법을 적용한 질의 처리가 가능한 Edge Manager의 구조를 제시한다.

• Journal of Technology Innovation
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• v.22 no.2
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• pp.157-183
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• 2014

This paper examines how the concentration of ownership in firms influences the R&D investment decision and whether the type of a firm's management (i.e, the owner-manager or professional manger) differentiates the relationship between the ownership concentration and R&D investments by using data of Korean pharmaceutical companies between 2004 and 2008. The results show that the share of the largest shareholder and R&D investment have an inverted U-shaped relationship, and whether a CEO is an owner or a professional manager affects the curvature of the inverted U-shaped relationship. Specifically, when a firm's CEO is a professional manager and the share of his stock is small, increase in the CEO's share increases the R&D investment in the larger amount than when a firm's CEO is an owner. This is because the increase in ownership reduces agency cost; However, when the share of his stock is large, the increase in CEO's share decreases R&D investment in the larger amount than when a firm's CEO is an owner. This is because a professional manager gets concerned over excessive risk exposure more than an owner-manager does.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2002.11a
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• pp.520-532
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• 2002

A new architecture called the Storage Area Network(SAN) was developed in response to the requirements of high availability of data, scalable growth, and system performance. In order to use SAN more efficiently, most SAN operating systems support storage virtualization concepts that allow users to view physical storage devices attached to SAN as a large volume virtually. A logical volume manager plays a key role in storage virtualization. In order for mapping managers to process snap-shots and reorganizations, an efficient freespace manager is required, and it affects the overall performance of logical volume. In this thesis, we design and implement a freespace manager for logical volume manager. The freespace manager efficiently allocates physical blocks for logical blocks. Also, it processes space allocation requests for supports snapshots and reorganizations.

• East Asian Journal of Business Economics (EAJBE)
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• v.8 no.1
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• pp.21-40
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• 2020

Purpose - The labor management department is an important area in charge of the labor-management relations that affects the competitiveness of the company. This study seeks to diagnose labor management education focusing on labor manager competency strengthening curriculum that is currently being conducted domestically and propose an educational model that can contribute to the labor manager competency development by researching improvement measures. Research design, data, and methodology - In this study, the first phase is a Delphi open form survey and 15 expert panels participated. The second phase had 31 expert panels participating and in the final IPA analysis, targeting 111 on-site subjects, it conducted a survey regarding desired level of current educational level and future education requirement. Results - A final 57 subjects regarding 11 items to increase the competency of the labor managers through the first and second Delphi survey was deduced through this study. To add, regarding the current education level and desired level that the current workers are thinking with respect to analysis results of the 57 subjects through the IPA analysis, an educational model could be deduced to increase competency of the labor managers based on the result. Conclusions - Thus far, research regarding labor management has been insufficient as it was defined as a subordinate role to human resources. This study reviews the role and competency of labor managers and presented an educational model to strengthen the capabilities of internal labor managers to re-illuminate the labor manager. However, this study is limited in terms of the diversity of the types of companies participating and the small number of panels. Better data can be produced if such parts are supplemented in the future.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2007.04a
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• pp.283-287
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• 2007

Pine Wilt Disease (Bursaphelenchus Xylophilus) has been attacked since 1988, then it becomes very serious problem of the all over the country. Government has been invested a lot of money to prevent but it is hard to survey the damaged area and ineffectively control the process of prevention. Therefore, this study is focused on development of Pine Wilt Disease (Bursaphelenchus Xylophilus) Prevention System using GIS and GPS through constructiong database of digital map, satellite imagery and attribute data and development component for desktop PC, internet and mobile system to realtime data transmission between project manager and field worker. Especially, we developed the mobile system that can transmit field conditions in realtime using GPS, GIS and CCD camera, the telecommunication control server that transmit received field condition data to web connecting module and system manager, the web system for end user to notify prevention details, the control system lot manager to recognize filed conditions and to control field workers and the wireless telecommunication module to connect in realtime between field and control center.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.20 no.8
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• pp.2436-2448
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• 1996

This paper presents the development of three types of network performance manager for IEEE 802.4 token bus networks that are a part of Manufacturing Automation Protocol(MAP). The performance managers attempt to keep the average data latency below a certain level specified for each priority class. All of the three performance managers are based on a set of fuzzy rules incorporating the knowledge on the relationship between data latency and parameters of the priority mechanism. These Fuzzy Network Performance Managers(FNPMs) have been evaluated via discrete event simulation to demonstrate their efficacy.

• Journal of the Korea Society of Computer and Information
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• v.10 no.4 s.36
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• pp.355-364
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• 2005

An example of such a new device is a mobile phone. The demand for wireless data communication is growing rapidly. However, agencies have not yet completed the standardization of the markup language. Due to the evolution of the Mobile Device, the agencies in this field have provided different data formats with each Mobile Device Platform. Traditionally, contents are hand-tailored to suit the target devices. A key problem is that the characteristics and capabilities of mobile devices are too diverse to service the most suitable mobile contents. Owing to this problem, the need for a reusable document description language increases. In this paper, we defined Template file that is common data to service mobile devices. We proposed method that could be effective wireless web service though design and the implementation of the Call Manager & the XSL Generator. In the methodology, when requesting wireless internet service, the mobile device finds out Markup language and hardware specification of the mobile device through the Call Manager component supports. The XSL Generator component creates XSL file dynamically that is the most suitable to device. Finally, contents is serviced to each device by XSLT.

• Journal of Korea Multimedia Society
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• v.11 no.7
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• pp.914-927
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• 2008

Grid database management systems are used for large data processing, high availability and data integration in grid computing. Furthermore the grid database management systems are in the use of manipulating the queries that are sent to distributed nodes for efficient query processing. However, when the query processing is concentrated in a random node, it will be occurred with imbalance workload and decreased query processing. In this paper we propose a load balancing method for query processing based on cache Management in grid databases. This proposed method focuses on managing a cache in nodes by cache manager. The cache manager connects a node to area group and then the cache manager maintains a cached meta information in node. A node is used for caching the efficient meta information which is propagated to other node using cache manager. The workload of node is distributed by using caching meta information of node. This paper shows that there is an obvious improvement compared with existing methods, through adopting the proposed algorithm.

• IE interfaces
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• v.8 no.1
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• pp.15-21
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• 1995

Since anthropometric data are essential to the design of industrial products, the national anthropometric survey was performed three times in Korea. An Anthropometric Data Manager system (ADaM) was implemented based on the 1992 national anthropometric survey to promote the utilization of the data. The system provides graphic user interface to facilitate usability. Anthropometric information can be obtained in various ways by the following statistical analyses; multivariate features analysis, correlation analysis, and regression. In addition, recommendations for design parameters of industrial products were provided in this system.