• Spatial Information Research
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• v.22 no.2
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• pp.73-87
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• 2014

The fact that the limits of information recency, diversity, and usability are mainly caused by the supply oriented geospatial data and service development is commonly recognized. It is recently tried to overcome the limits by facilitating user experience and VGI(Volunteered Geographic Information) in several geospatial web services. This study suggests 10C framework of geospatial web service for VGI through review and examination of previous research. Based on the 10C framework, the value chain system of 23 use cases relevant to the geospatial web service involving the creation of user's VGI is investigated. The result of the value chain analysis is applied to examine and formulate the strategies to generate value addition from public spatial information with respect to creation, aggregation, delivery, and consumption process of VGI.

• International Journal of Computer Science & Network Security
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• v.21 no.6
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• pp.107-118
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• 2021

The deployment of 5G is in full swing, with a significant yearly growth in the data traffic expected to reach 26% by the year and data consumption to reach 122 EB per month by 2022 [10]. In parallel, the idea of smart cities has been implemented by various governments and private organizations. One of the main objectives of 5G deployment is to help develop and realize smart cities. 5G can support the enhanced data delivery requirements and the mass connection requirements of a smart city environment. However, for specific high-demanding applications like tactile Internet, transportation, and augmented reality, the cloud-based 5G infrastructure cannot deliver the required quality of services. We suggest using multi-access edge computing (MEC) technology for smart cities' environments to provide the necessary support. In cloud computing, the dependency on a central server for computation and storage adds extra cost in terms of higher latency. We present a few scenarios to demonstrate how the MEC, with its distributed architecture and closer proximity to the end nodes can significantly improve the quality of services by reducing the latency. This paper has surveyed the existing work in MEC for 5G and highlights various challenges and opportunities. Moreover, we propose a unique framework based on the use of MEC for 5G in a smart city environment. This framework works at multiple levels, where each level has its own defined functionalities. The proposed framework uses the MEC and introduces edge-sub levels to keep the computing infrastructure much closer to the end nodes.

• Journal of Information Processing Systems
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• v.3 no.1
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• pp.1-7
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• 2007

In mobile ad hoc networks, an application scenario requires mostly collaborative mobility behavior. The key problem of those applications is scalability with regard to the number of multicast members as well as the number of the multicast group. To enhance scalability with group mobility, we have proposed a multicast protocol based on a new framework for hierarchical multicasting that is suitable for the group mobility model in MANET. The key design goal of this protocol is to solve the problem of reflecting the node's mobility in the overlay multicast tree, the efficient data delivery within the sub-group with group mobility support, and the scalability problem for the large multicast group size. The results obtained through simulations show that our approach supports scalability and efficient data transmission utilizing the characteristic of group mobility.

• The Transactions of the Korea Information Processing Society
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• v.4 no.4
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• pp.973-981
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• 1997

This paper identifies the main features and problems which have to be considerde when providing multicast services for mobile hosts.We also present a schme for solving these problems.To do this,we intreduce the ieda of the group view with a host status and present a multicast algorithm based on the group view concept.This paper mainly fouces on the exactly-once semantic for multicast delivery.It will provide basis for build-ing multicast servies for mobile hosts.

• IEMEK Journal of Embedded Systems and Applications
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• v.2 no.3
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• pp.155-163
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• 2007

In Ad Hoc Networks, a connection breaks due to the irregular movement of mobile nodes and the inherent characteristics of the wireless medium such as the interference and the multi-path fading. AODV, a typical on-demand routing protocol in Ad Hoc networks, uses Destination sequence numbering for loop-free, but it may cause RREQ broadcast storm problem. This paper proposes AODV_ods that does not need destination sequence number, in routing message and routing table without routing loop. To show the effectiveness of the proposed scheme, we performed extensive simulation with NS-2. The simulation results show that the proposed ADOV_ods efficiently uses wireless bandwidth compare to the original AODV. Finally AODV ods reduces the routing overhead, end to end delay and increases the overall packet delivery ratio.

• Korean Parent-Child Health Journal
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• v.7 no.1
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• pp.28-37
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• 2004

This study intends to analyse the concept on the child-rearing of parents. Through analysis, several concepts on the child-rearing would be cleared, and therefore the groundwork of the theoretical framework can be constructed. The concepts were analyzed by the method of Walker & Avant(1995). The attribute of child-rearing is as follows; nutrition supply, affectionate mind, caring, growth development supporting, protecting, instructing, pregnancy, delivery etc. The proper child-rearing helps reinforce child development, mother-infant attachment, social disposition, parental-role contentment and family relationship. This study would be helpful to the establishment of child-rearing paradigm. And therethrough this result although helps construct proper child-rearing as well as theoretical groundwork.

• IE interfaces
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• v.22 no.1
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• pp.1-9
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• 2009

As the LCD fabrication factories (Fab) are highly capital-intensive and the markets are very competitive, it is an essential requirement of operational management to achieve full-capacity production while meeting customer demands on time. In a typical LCD Fab, medium-term schedules such as release plans and production plans are critical to achieve the goal of full-capacity production and on-time delivery. Presented in this paper is a framework for weekly planning system generating medium-term schedules using a finite-capacity planning method. Also this paper presents a release planning method applying capacityfiltering algorithm, especially backward capacity-filtering procedure, which is one of the finite-capacity planning methods. In addition, performance analyses using actual data of a TFT-LCD Fab show that the proposed method is superior to existing methods or commercial S/W products generating release plans.

• Asia pacific journal of information systems
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• v.13 no.4
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• pp.97-118
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• 2003

The Internet provides a new way of doing business, but ease of copying and of sharing valuable digital information illegally across the Internet undermine many viable business models. This paper investigates the Digital Rights Management(DRM) as a means to provide safe protection and proper delivery of digital contents through the Information highway. First, we briefly summarize the current endeavor of DRM technical development and standardization process held in key technical working groups. Then, the paper provides a generic architecture for a DRM framework and shows the implementation of a prototype of DRM system incorporating key conceptual and technical standardization development. This study emphasizes the importance of developing the DRM architecture that provides the proper protection and safe transformation of digital contents in electronic commerce.

• 한국경영정보학회:학술대회논문집
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• 2007.06a
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• pp.473-478
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• 2007

As customers' participation in B2C e-commerce increases, customers are getting more involved in the delivery of services, which may even go beyond the completion of service transactions. To examine such proactive extra-role online customer behavior, we delve into organizational citizenship behavior framework, which has been recently extended to examine customer citizenship behavior (CCB) in the service market area. Although CCB is vital for online retailing success, MIS and e-commerce research efforts have generally focused on the customer's customer coproduction that are customer in-role behaviors. Moreover, although the effect of information created by anonymous strangers on other customers increase, interpersonal trust research have focused on only the relationship between a seller and a customer. Therefore, this study attempts to answer two research questions: What are motivational factors that affect CCB? How differently do the two kinds of interpersonal trusts (trust in online retailer and trust in customers) influence customers?

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2001.11b
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• pp.99-102
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• 2001

MPEG-4 시스템은 객체기반 코딩을 통하여 각각의 객체들이 독립적으로 운용될 수 있다. 객체들은 ES(Elementary Stream)로 구성되며 DMIF(Delivery Multimedia Integration Framework)를 통해 전송된다. DVB-Data Carousel은 데이터의 반복적인 전송을 통해 서비스의 안정성 및 효율성을 향상시킬 수 있다. 본 논문은 MPEG-4 시스템에서 주기적으로 갱신이 필요한 정보나 반복적인 전송을 필요로 하는 객체에 대해서 DMIF를 이용하여 DVB-Data Carousel을 전송하는 방법에 대하여 기술하며 각각의 시스템은 DMIF의 Descriptor를 이용하여 상호 연동할 수 있다. 본 논문은 MPEG-4시스템 객체의 일부를 DVB-Data Carousel을 이용하여 위성을 통하여 클라이언트에게 전달하는 시스템을 기술한다.