• 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 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.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.47 no.3
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• pp.202-216
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• 2024

In today's rapidly changing business environment, rapid decision making and effective project management are essential for business growth. This study examines how project manager competencies and organizational structures affect business performance. Successful project execution depends on the strategic use of project managers' skills and organizational resources to maximize performance. An empirical study was conducted with 475 participants from the construction and engineering sectors. The applied analyses included multiple regression analysis and two-way ANOVA to assess how project manager competencies and organizational types affect business performance. The results of the study show that project manager competencies significantly improve business performance, especially when combined with appropriate organizational types. Effective use of organizational frameworks leads to better financial results, increased market competitiveness, and greater innovation. The results of the study are as follows: First, project manager competencies were found to have a significant positive effect on business performance. Second, the use of functional, project, and matrix organizations had a significant positive effect on business performance. This suggests that aligning organizational structures with business objectives is important for achieving optimal performance. Overall, this study provides valuable insights into the academic literature and practical applications of project management and organizational research. In addition, if we can select organizational members based on the learning effects of previous projects when operating new projects in the future, it will help reduce risks. Ultimately, it will improve the project manager's competency level, promote the individual abilities and knowledge sharing of team members, and provide opportunities for the company to build efficient new systems. This will be evaluated as a valuable study in terms of academic and practical productivity.

• Proceedings of the KIEE Conference
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• 2001.11c
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• pp.107-110
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• 2001

Recently, there are lots of concerning on robot agent system working for itself with the trends of the research of bio-mimetic system and intelligent robot. In this paper, a virtual 3D interface system is proposed based on Internet for remote controlling and monitoring of mobile robot. The proposed system is constructed as manager-agent model. A worker can order the robot agent move to a new position by clicking the destination on virtual space of 3D graphic interface in manager. Then the robot agent move to the position automatically with avoiding collision by using range finding and autonomous control algorithm. The proposed robot agent system lets us control the mobile robot remotely located more conveniently.

• The KIPS Transactions:PartA
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• v.8A no.2
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• pp.91-98
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• 2001

TCP/IP based remote system using internet presented the method to access and control all the types of resources connected to network system over time and space. In this paper, We studied a resource control method through a mutual communication of a system association composed of service user, provider, and manager of the network system for the web based remote control system. The service users require the resources, and its providers are a variety of devices and digital electronic products which can provide the services in a network system. The service manager who operates the whole system performs the role to interconnect its users with its providers. Through an experiment, an implemented system confirmed flexibility, stability, and extensibility of the method presented in this paper.

• Annual Conference of KIPS
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• 2002.11a
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• pp.167-170
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• 2002

본 고의 Multi-Media Caching System 은 이동 단말기의 보급 & 발달로 예상되는 Trans-coder 부하의 증가와 응답 시간 개선 하기 위한 것으로 기존의 Web 문서의 Caching System 과 비교 분석 하고, 빈번한 이동 단말기의 요구에 의해서 발생하는 않은 trans-coder 작업을 최소화 할 수 있는 XML 기반의 Caching System을 연구 하고자 한다. 즉, 기존의 Web Caching System의 장점과 XML의 재 사용 성, 확장 성, 플랫폼 독립성, 다양한 종류의 응용 프로그램과의 접목성 등의 장점을 살리고, Cache System Manager에 의해 최소환의 Trans-coder 동작이 일어나도록 한다. 따라서 Trans-coder 된 작업을 Caching System 에 보관 관리 하는 최적의 Caching System Manager 방법을 제안하고자 한다.

• Convergence Security Journal
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• v.4 no.2
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• pp.1-7
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• 2004

The growth of incidents on the Internet has reflected growth of the internet itself and growth of the computing Power. while in Previous years, external attacks tended to originate from those interested trend in exploring the Internet for its own sake and testing their skills, there is an increasing trend towards intrusions motivated by financial, Political, and military objectives. so, attacks on the nation's computer infrastructures are becoming an increasingly serious problem. Even though the problem is ubiquitious, government agencies are particularly appealing targets and they tend to be more willing to reveal such events than commercial organizations. The threat of damage made necessity of security's recognition, as a result, many researches have been carried out into security of system actively. Intrusion Detection technology is detection of intrusion using audit data differently from using traditional simple filtering and informs manager of it. It has security manager of system deal with the intrusion more quickly. but, cause current environment of Internet manager can't doing response Intrusion alert immediately That's why IPS needed. IPS can response automatically the intrusion alert. so, manager is more comfortable and can response quickly.

• The KIPS Transactions:PartC
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• v.11C no.7 s.96
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• pp.999-1008
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• 2004

The Jini system provides an infrastructure to facilitate a programmer to develop distributed systems. As one of the Jini services, JavaSpare has been used as a repository which is accessible publicly in the Java distributed environment. Although JavaSpace could give a useful method for saving and sharing java object, it would not be applicable to develop a distributed system requiring access securities for the objects because JavaSpare does not support secure access control. In this paper, we present a secure JavaSpare service based on Jini2.0 named SeureJS, which strengthens the security weakness of JavaSpare. The system consists of ObjectStore to store Java objects, AccessManager to control access of ObjectStore and KeyManager to manage public keys.

• Journal of the Korea Society of Computer and Information
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• v.4 no.4
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• pp.177-184
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• 1999

GDMO Agent platform based on TMN modeling operating status of network elements and resources to Managed Object as GDMO standard and controled by telecommunication management function requests of manager supporting status of resources. To supporting basic function of these GDMO agent, 13 kinds of system management function has to be implemented. Event-Report-Management function related to all system management functions. The reason that rapidly reporting has been performed as status of resources to manager by continuously communication with real resources. In this paper, a number of approach has been analyzed to communication with real resources for effective event-report management function and we proposed new real resource monitoring schemes of RRMC(Real Resource Message Coordinator) architecture for improving these resulted problem.

• Journal of KIISE:Computing Practices and Letters
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• v.8 no.4
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• pp.376-388
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• 2002

Recently, although there are strong requirements to manage multimedia data, there are a few researches on efficient storage and retrieval of multimedia data. In this paper, we design an object storage engine which can store and retrieve various multimedia objects efficiently. For this, we design an object manager for storing a variety of multimedia data and an inverted file manager for indexing unformatted text objects. In addition, we implement the objects storage engine which can support concurrency control and recovery schemes of DBMS by integrating the object manager and the inverted file manager with the SHORE low-level storage system. Finally, we develope a TIROS(Thesis Information Retrieval using Object Storage engine) system in order to verify the usefulness of our object storage engine.