• The Journal of Korean Institute of Communications and Information Sciences
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• v.38C no.7
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• pp.587-594
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• 2013

With the development of web 2.0 and the rapid diffusion of smart devices, current web service, which only provides very limited information and service, has been transformed into user-friendly and comprehensive web service called mash-up service. Mash-up service is defined as comprehensive service that is created by combining variety of web services. When composing a mesh-up service, Open API is used as web service interface. Current mash-up service, however, has fundamental problem in that it could not satisfy the various needs of users who want I-centric personalized service because it is developed and provided by service developers. To overcome these obstacles, a lot of studies on mesh-up framework are being performed for improving mash-up proess though, it is still in beginning stage. In this paper, we introduce an API selection and compostion method as the key technology for mesh-up framework that support the automatic creation of mesh-up service.

• Journal of Korea Society of Digital Industry and Information Management
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• v.6 no.2
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• pp.81-89
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• 2010

The major worldwide communication network operators have designed and are building up the NGN with various network capabilities, which conventional Internet do not have. The open network service model makes these network capabilities available to the third party of the value added service providers through the standardized API providing users with more intelligent and enhanced services. This paper proposes the open network service model as NaaS (Network as a Service) and examines service models of several levels. It is believed that these efforts presented in this paper will make the network operators expand their service ranges through the opening of invested network resources producing more various communication services for users.

• Journal of the Korean Association of Geographic Information Studies
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• v.16 no.4
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• pp.141-152
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• 2013

The applications and concerned technologies of cloud computing services, one of major trends in the information communication technology, are widely progressing and advancing. OpenStack, one of open source cloud computing platforms, is comprised of several service components; using these, it can be possible to build public or private cloud computing service for a given target application. In this study, a remote sensing image analysis processing service on cloud computing environment has designed and implemented as an operational test application in the private cloud computing environment based on OpenStack. The implemented service is divided into instance server, web service, and mobile app. A instance server provides remote sensing image processing and database functions, and the web service works for storage and management of remote sensing image from user sides. The mobile app provides functions for remote sensing images visualization and some requests.

• Journal of Korean Elementary Science Education
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• v.28 no.4
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• pp.404-414
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• 2009

The revised curriculum in 2007 includes open inquiry approach to increase students' interest in science and to build up creativity. So teachers and pre-service teachers should be equipped with the ability of open inquiry performance. In order to investigate pre-service teachers' readiness to perform open inquiry tasks, we analyzed reports written as homework by a group of 71 juniors in a national university of education. The investigation tool was composed of four domains: topic selection, the inquiry process, the conclusion, and reporting. Each domain had three or four sub-domains. By using the framework, four raters scored the students' inquiry reports. The findings reveal that the pre-service elementary school teachers have difficulty in the domain of 'topic selection' and the 'conclusion' compared with the other domains. Under the topic selection domain, they showed weaknesses in 'creativity' and 'scientific topic' and under the conclusion domain, they had difficulty in 'recognizing limits' and 'value of conclusion'. The finding suggests that pre-service teaching program should provide with opportunities to perform open inquiry continually.

• 한국공간정보시스템학회:학술대회논문집
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• 2005.05a
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• pp.79-84
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• 2005

LBS 플랫폼은 이동통신망과 LBS 사이에서 필요한 기반 기술을 제공하기 위한 플랫폼으로서, 망과의 접속 및 위치 정보 서비스, 사용자 정보 서비스, 망 관리 등의 기술을 제공하는 LBS 포털 서버 기술, 다양한 LBS 응용 서비스를 지원하는 응용 서버 기술, 실시간 대용량 위치정보를 처리하는 위치데이터 서버 기술로 구분된다. 본 연구는 다양한 LBS 응용 어플리케이션을 개발하기 위한 응용서버기술로써 OpenLS Core Service 사양의 'Presentation Service', 'Location Utility Service', 'Directory Service'를 W3C 웹 서비스 표준을 준수하도록 구현하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.5
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• pp.1146-1154
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• 2010

A virtual machine lease service in the cloud computing environment has been implemented using the open source cloud computing platform, OpenNebula. In addition, a web-based cloud user interface is developed for both convenient resource management and efficient service access. The present virtual machine allocation scheme adopted in OpenNebula has performance reduction problem because of not considering CPU allocation scheduler of the virtualization software. In order to address this problem we have considered both the priority of the idle CPU resources of the cluster and credit scheduler of Xen, which resulted in performance improvement of the OpenNebula virtual machine scheduler. The experimental results showed that the proposed allocation scheme provided more virtual machine creations and more CPU resource allocations for cloud service.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.255-255
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• 2004

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.475-477
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• 2001

흠 네트워킹에 대한 관심이 높아지며 이를 실현하는데 필요한 Residential Home Gateway를 구현하기 위해 2000년 5월 OSGi에서 Open Service Gateway Specification을 발표했다. 본 논문에서는 이에 따른 Home Automation Controller를 구현하기 위한 방법을 논하고 있다. 먼저 Home Automation Controller의 개념에 대해서 알아보고 OSGi의 배경과 Open Service Gateway Specification의 내용을 살펴본다. 그리고 specification에 따른 Home Automation Controller용 개방형 서비스 게이트웨이를 구현하는 방법에 대해 고찰해 본다.

• Journal of Digital Convergence
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• v.11 no.6
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• pp.113-127
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• 2013

The open market are expanding service quality which was used as rating scale in the field of marketing. In accordance with open market, they convert it to e-service quality and use it. Udo et al.[6] suggested web service quality combining e-SEVQUAL[2] and extended Information Success Model[7]. This study suggests four influence factors of e-service quality in the open market; website privacy and security, web site contents, web site convenience, and images of the open market companies. The study conducted survey on 301 college students and life long education center students in Busan. The study found that all four influence factors have positive effects on the web service quality and ultimately web service quality has beneficial effects on the satisfaction in open market users' information system.

• Korean Journal of Remote Sensing
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• v.33 no.4
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• pp.339-350
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• 2017

In recent, cloud computing paradigm and open source as a huge trend in the Information Communication Technology (ICT) are widely applied, being closely interrelated to each other in the various applications. The integrated services by both technologies is generally regarded as one of a prospective web-based business models impacting the concerned industries. In spite of progressing those technologies, there are a few application cases in the geo-based application domains. The purpose of this study is to develop a cloud-based service system for satellite image processing based on the pure and full open source. On the OpenStack, cloud computing open source, virtual servers for system management by open source stack and image processing functionalities provided by OTB have been built or constructed. In this stage, practical image processing functions for KOMPSAT within this service system are thresholding segmentation, pan-sharpening with multi-resolution image sets, change detection with paired image sets. This is the first case in which a government-supporting space science institution provides cloud-based services for satellite image processing functionalities based on pure open source stack. It is expected that this implemented system can expand with further image processing algorithms using public and open data sets.