• Journal of the Institute of Electronics Engineers of Korea TC
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• v.42 no.10 s.340
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• pp.31-38
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• 2005

Ipsec is a security protocol suite that provides encryption and authentication services for IP messages at the network layer of the internet. Internet Key Exchange (IKE) is a protocol that is used to negotiate and provide authenticated keying materials in a protected manner for Security Associations (SAs). In this paper, we propose a dynamic key lifetime change algorithm for performance enhancement of virtual private networks using IPSec. The proposed algorithm changes the key lifetime according to the number of secure tunnels. The proposed algorithm is implemented with Linux 2.4.18 and FreeS/WAN 1.99. The system employing our proposed algorithm performs better than the original version in terms of network performance and security.

• The Research Journal of the Costume Culture
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• v.7 no.4
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• pp.1-13
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• 1999

The purpose of this study is to remind the necessity of reengineering establishment of future-oriented fashion industry and to research the devices for the devices for the system establishment at this present time when the consumer\`s demands level is extremely high. This research has been done by the literature review of the relative articles, books and the case study. First, through the analysis of the important changes and movements of fashion industry environment by the environmental interpretation model of Draft and Weick, the strategic development, corresponding the environment change of fashion industry, has been attempted. Second, this study examined QR integration management method according to the Kunz\`s behavior theory of the apparel firms. Third, as the prior occupation strategy regarding the things can be done very well from now on the things are needed, the necessity and establishment of SCM, based on companionship and beyond the boundary between the companies has been studied through the exchange of the data of manufacture and sales which has been regarded as the secret of the companies. Finally, to become a company to lead the market, in addition to the re-organization of the internal process of a company with the leadership which has the clear vision for the consumer\`s satisfaction, the process have ti be integrated under the cooperation with its business partners and the cost have to be reduces, and the which takes to correspond to the consumer\`s requirements have to be reduced.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.30 no.4
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• pp.155-163
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• 2007

Future war needs a lot of changes for military organization. Specially, concept of the "Speed" is raised importantly after Iraq war of U.S. Armed Forces. So, He is a lot of studying supply chain for logistical support speed improvement. Korea Marine Corps has made an efforts to improve supply chain. However it is real that is putting various techniques by prescription rather than fundamental change. These simplicity prescriptions are not only systematic but also insufficient for Marine Corps' survival. In addition, Korea marine corps in actuality is depending on many members in marine and navy in feed chain. Thus it is not establishing even tactical, decision-making plan of operation for support ability cultivation. Therefore, in this study, with Sense and Response concept that is United States Marine Corps' support strategy, presented theoretical background and basis frame that serve that Korea Marine Corps's supply chain changes to perception reaction formation.

• Industrial Engineering and Management Systems
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• v.11 no.1
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• pp.54-69
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• 2012

Chan and Qi (SCM 8/3 (2003) 209) developed an innovative measurement method that aggregates performance measures in a supply chain into an overall performance index. The method is useful and makes a significant contribution to supply chain management. Nevertheless, it can be cumbersome in computation due to its highly complex algorithmic fuzzy model. In aggregating the performance information, weights used by Chan and Qi-which aim to address the imprecision of human judgments-are incompatible with weights in additive models. Furthermore, the default assumption of linearity of its scoring procedure could lead to an inaccurate assessment of the overall performance. This paper addresses these limitations by developing an alternative measurement that takes care of the above. This research integrates three different approaches to multiple criteria decision analysis (MCDA)-the multiattribute value theory (MAVT), the swing weighting method and the eigenvector procedure-to develop a comprehensive assessment of supply chain performance. One case study is presented to demonstrate the measurement of the proposed method. The performance model used in the case study relies on the Supply Chain Operations Reference (SCOR) model level 1. With this measurement method, supply chain managers can easily benchmark the performance of the whole system, and then analyze the effectiveness and efficiency of the supply chain.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.232-234
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• 2017

In this research, the BLDC motor 2 axis controller was designed using a dual core processor. The controller used TMS320F28377D which is TI's latest dual-core DSP, and the BLDC motor was selected with the position of resolver having high reliavility and the speed sensor built-in type motor.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.565-568
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• 2004

최근 ERP에 고객관계관리(CRM), 공급망관리(SCM), 지식관리(KMS) 등의 기능을 확장한 확장형 ERP에 대한 연구개발이 활발해지고 있다. 그러나 타산업과 달리 건설산업의 특수성으로 인한 정보화의 부진으로 인해 이러한 새로운 개념을 적용할 수 있는 ERP 확장모델이 없는 상태이며, 대기업의 경우 일부 이러한 모듈을 부분적으로 적용하려는 움직임은 보이고 있으나, ERP와 별도의 이종시스템으로 관리되고 있어 통합적인 ERP운용을 통해 얻을수 있는 효과를 기대하기 어려운 실정이다. 이에 본 연구에서는 산자부에서 건설표준ERP템플릿으로 지정받은 ERP엔진을 모체로 협력업체와의 인터페이스 제공을 위한 협업적IT시스템과 전자계약시스템, 그리고 변화되는 ISO에 대한 기업의 대처능력 향상을 위한 ISO인증관리시스템, 고객과의 관계관리를 위한 고객관계관리시스템, 절차서와 같은 기업 내의 표준화 된 문서를 관리하기 위한 전자매뉴얼관리시스템, 결재관리를 위한 그룹웨어, 기업 내의 지식저장소 관리를 위한 지식관리시스템을 연구범위로 하여 건설분야 확장형ERP 모델(E2CM)을 개발하였으며, 이를 검증을 위한 시스템(eCOMIS)을 개발하였다.

• Journal of Distribution Science
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• v.20 no.12
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• pp.59-69
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• 2022

Purpose: The purpose of this research is to identify and design a model for the integration between marketing and supply chain management (SCM) of technopreneurship-based souvenirs MSMEs to fulfil customer value creation. Research design, data and methodology: This research method uses the system development life cycle method. This study draws its insights and conclusions from a literature review in several fields followed by an interactive research approach that helps identify, validate, and implement a theoretical framework so that the modelling results can be adopted in applicative manner for souvenir MSMEs. Result: Implementing the "G-ASPOO-L" supply chain management integration model based on technopreneruship to fulfil value creation in the 5.0 society era created three perspectives: an inter-functional perspective, a process perspective, and an integrated business concept perspective. The supply chain management involves enterprise integration, strategic customer integration, strategic supplier integration, and marketing strategy integration. Conclusion: The proposed model framework leads to managerial problems of supply chain management strategy, which urgently requires an interaction approach that challenges the traditional view of demand creation and implementation of supply chain management to fulfil value creation. This research leverages existing knowledge and advances our understanding of the strategic integration issues companies face in digital-based competition.

• Journal of Korea Port Economic Association
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• v.24 no.4
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• pp.329-347
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• 2008

This thesis aims to contribute to upgrading its position to the biggest 8 ports in Korea by suggesting activating schemes of Kunsan Port in rapidly changing shipping environments. The research methodologies such as literature survey, O/D analysis are adopted in the study. The following several conclusions can be suggested. Firstly, in port logistics system the dredging in navigational channels and in Kumgang Dam and the incentive schemes for the shipping companies and the international freight forwarders are required. Secondly cargo inducement schemes should be introduced to induce container cargoes originated in Junbook Do Province and adjacent area etc. Thirdly the development of new shipping routes and strengthening the coastal routes among domestic sea ports. Fouthly establishing supply chain management system with adjacent Chinese Provinces such as Shandong.

• The Journal of the Korea institute of electronic communication sciences
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• v.14 no.6
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• pp.1077-1082
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• 2019

The development of computing technology and networking has developed into a fundamental technology of the Fourth Industrial Revolution, which provides a ubiquitous environment. In the ubiquitous environment, the IoT environment has become an issue so that various devices and the things can be actively accessed and connected. Also, the RFID system using the wireless identification code attaches an RFID tag to the object, such as the production and distribution of products. It is applied to the management very efficiently. EPCglobal is conducting a research on RFID system standardization and various security studies. Since RFID systems use wireless environment technology, there are more security threats than wire problems. In particular, failure to provide confidentiality, indistinguishability, and forward safety could expose them to various threats in the Fourth Industrial Revolution. Therefore, this study analyzes the standard method of EPCgolbal and proposes RFID security method using hash code that can consider the amount of computation.

• The Journal of Korean Physical Therapy
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• v.30 no.2
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• pp.47-53
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• 2018

Purpose: To find the effect of visual feedback of head angle with using a mobile posture-aware system on craniocervical angle and neck and shoulder muscles fatigue for preventing or decreasing the forward head posture. Methods: Twenty-four healthy young adults in Chungbuk to participate in this study. The subjects started to watch a movie clip for 10 minutes with visual feedback in $0^{\circ}$, $30^{\circ}$, and $60^{\circ}$ of head angles. During the task, surface electromyography (EMG) was used to collect data from the upper trapezius (UT), sternocleidomasetoid muscle (SCM), cervical erecter spinae (CES) during watching the smartphone. Craniocervical angles were measured using a sagittal-view photograph of the subject in a sitting posture. A one-way repeated analysis of variance with a significant level of 0.05 used for statistical analysis. Results: Craniocervical angle with $0^{\circ}$ visual feedback was significantly greater than $30^{\circ}$ and $60^{\circ}$. Craniocervical angle with $30^{\circ}$ visual feedback was significantly greater than $60^{\circ}$. In addition, MDF of UT muscles in $0^{\circ}$ and $30^{\circ}$ of visual feedback was significantly greater than $60^{\circ}$. Conclusion: We concluded that $0^{\circ}$ visual feedback of head angle with using a mobile posture-aware system would be beneficial to prevent or decrease forward head posture during watching a smartphone. We also could recommend using of $30^{\circ}$ visual feedback in case of caring UT muscle fatigue primarily.