• Proceedings of the Korea Information Processing Society Conference
• /
• 2002.04b
• /
• pp.1053-1056
• /
• 2002

누구나 컴퓨터를 사용하면서 제 때 백업을 하지 않아 낭패를 본 경험을 가지고 있을 것이다. 특히, 요즘과 같이 무형의 정보 자산이 큰 가치를 가지는 시대에는 그 중요성이 더 크다. 9.11 미국 테러 사태 이후 데이타 백업의 중요성이 크게 부각되고 있다. 많은 기업이나 기관 뿐만 아니라 개인까지도 백업에 중요성에 대해 인식하고 있고, 많은 네트워크 시스템들이 앞다투어 백업 및 복구 시스템을 도입하고 있다. 거기다 근래에는 로컬 백업보다는 인터넷을 이용한 사이트 백업 방식이 더 선호되고 있다. 하지만 사이트 백업은 구축과 운영에 많은 비용이 들게 되고, 이미 망관리 시스템과 같은 관리 시스템이 설치되어 있는 환경에서는 관리 체계가 이원화되어 복잡해 질 수 있다. 이러한 추세에 맞추어 본 논문에서는 자바로 구현한 백업 및 복구 시스템을 소개하고자 한다. 본 시스템은 기존의 망관리 시스템에 부가하여 사용할 수 있도록 모듈화시켜 JDK가 설치되어 있는 어떠한 유닉스 시스템에서도 편리하게 백업을 수행할 수 있도록 설계 및 구현되어 있고, 웹기반의 사용자 인터페이스를 제공하고 있어 원격지에서도 관리하고 있는 호스트들의 백업 작업을 쉽게 수행할 수 있다.

• Journal of Digital Convergence
• /
• v.10 no.9
• /
• pp.101-110
• /
• 2012

In recent days, lots of social commerce newly emerged business types of e-commerces are on the basis of social network. Therefore social commerce with social network might be powerful communication channel among customers and has suggested new paradigm in transaction model on the internet. In general, major roles of social commerce sites are to promote transaction with high discount rate and/or lots of event and to activate markets of local area. As characteristics of social commerce such as dynamic, rapid, and open, this research was assumed that design factors of sites that are different from existing e-commerce sites might be influential elements in decision making of purchase. This research is to empirically investigate which factors affect purchase decision making behaviors for 20s respondents who are major users of social commerce services. As a result major factor, easy-to-use, affecting decision making factors was identified and this result can give implication to researchers and persons in charge of fields who have interests in commerce site design and upgrade.

• The Journal of the Korea Contents Association
• /
• v.17 no.4
• /
• pp.108-118
• /
• 2017

This study focuses on an effectiveness of socially recommended advertising on social network sites (SNSs) and investigates the impact of three critical factors on SNS advertising effectiveness - reward type for advertising recommenders' intention, product type on advertisements, and tie strength. A $2{\times}2$ factorial design was used to test the interaction effects between the two variables, reward type and product type on advertisements, moderated by tie strength. The results indicate that when participants observe socially recommended advertising, hedonic product ads with non-monetary reward shows the most effectiveness, and reward type and product type are also effective. In the combination of reward type and product type, we have confirmed the regulating factor influencing the effectiveness of social advertising according to the tie strength between the recommenders and the consumers. Strong-tie recommenders have more influence on the effectiveness of the social advertising than weak-tie recommenders. Based on these results, theoretical and practical implications were provided to refine marketing environments on SNSs.

• KIISE Transactions on Computing Practices
• /
• v.22 no.11
• /
• pp.547-558
• /
• 2016

Construction of multi-site Cloud Infrastructure with OpenStack, the most popular cloud open source project with various ICT infrastructure technologies, has operational inefficiency due to installation complexity and geographical limitation. To address this inefficiency, we gradually developed automated installation/configuration tools to automate installation/configuration of Linux and OpenStack by complying with DevOps methodology over a multi-site OpenStack testbed called OF@KOREN SmartX Playground. However, the pre-developed installation tools can be used only for limited cases. Therefore, we designed and developed a prototype of SmartX Provisioning Framework which could conducts Playground-wide provisioning flexibly by following three steps of resource management in Software-defined Infrastructure. We verified the efficiency of the provisioning functionality of the framework by demonstrating an example of automated multi-site cloud construction.

• Journal of KIISE:Computing Practices and Letters
• /
• v.8 no.2
• /
• pp.206-218
• /
• 2002

In this paper, we design and implement a system that presents a method for selecting and providing personalized services independently without unifying the existing system platform with shopping malls joined in the hub site. This system provides a mechanism for gathering information left behind by many clients visiting Web sites for analysis of customers property, vector model for selecting personalized services, and mechanism for providing them to customers who visited in a shopping mall joined to the hub site. In a position of shopping mall site, this kind of personalization system can provide target advertisement, point marketing, and point share service etc. without changing existing shopping mall's environment through wrapper web server. Hub site customers can get personalized services from many shopping mall sites with only once registration for the hub site.

• The Journal of Korean Association of Computer Education
• /
• v.7 no.3
• /
• pp.67-78
• /
• 2004

Since the 7th National Curriculum was established, ICT has emerged as an indispensable tool for teaching a variety of subjects in K-12 education systems. This paper develops the model for explaining the factors affecting students' satisfaction level in using web contents for science class. Based on data collected from a questionnaire survey from the students who evaluated the web sites providing the information related to the science subject, the structural equation model is presented. From this model, a following conclusion is provided : credibility and understandability/motivation are the most important factors affecting the level of satisfaction, but the presentation method, the screen design as well as contents itself has indirect impact on user satisfaction through understandability/motivation. Other interesting results are also provided. This result might provide the useful guidelines for designing the web-contents for science class in high school.

• Journal of Information Management
• /
• v.33 no.3
• /
• pp.87-104
• /
• 2002

With China Market and strengthening of an international and political position of China, we need to promote exchange and cooperation with China for the supplement of economic vitality and for contriving the contribution of the flow of growth. The necessity of salient traits is needed such as sharing information, training a specialist, network between China Specialists, system establishment of China information DB and sharing China information. Accordingly, KIEP makes the most of limited special manpower and information, and developed China Specialist Forum Website : CSF which will make a stepping stone of systematic, synthetic exchange and cooperation with China. KIEP presented a development direction, comparing and analyzing promptly easy to get the information China Specialists want here, CSF made for mutual exchange of science, trade and the other issue, Taiwan website "a commercial business intelligence network of China and Taiwan", and Singapore "IE Singapore".

• Journal of the Korea Society of Computer and Information
• /
• v.12 no.5
• /
• pp.19-27
• /
• 2007

We have implemented a WWW homepage which finds an optimal route for users. There already exist many web sites which provide the optimal route when a start and a destination cities are given. However, none of them can find the optimal route when a number of cities to be visited. The problem of finding the optimal route starting at a given start city and visiting through all the given intermediate cities and finally returning to the start city is called Travelling Sales Person(TSP) problem. TSP is a well known exponential time complexity problem. We have implemented an artificial intelligent search algorithm for TSP on our homepage. The main feature of our algorithm is that the destination may not be the same as the start city whereas all of the existing heuristic algorithms for TSP assume that the start and the destination cities are the same. The web page asks a user to select all the cities he or she wants to visit(including start and destination city), then it finds a sequence of the cities such that the user would travel minimum distance if he or she visits the cities in the order of the sequence. This paper presents algorithms used in the homepage.

• Convergence Security Journal
• /
• v.24 no.1
• /
• pp.35-42
• /
• 2024

Multi-tenancy architecture plays a crucial role in cloud-based services and applications, and data isolation within such environments has emerged as a significant security challenge. This paper investigates various data isolation methods including schema-based isolation, logical isolation, and physical isolation, and compares their respective advantages and disadvantages. It evaluates the practical application and effectiveness of these data isolation methods, proposing security considerations and selection criteria for data isolation in the development of multi-tenant websites. This paper offers important guidance for developers, architects, and system administrators aiming to enhance data security in multi-tenancy environments. It suggests a foundational framework for the design and implementation of efficient and secure multi-tenant websites. Additionally, it provides insights into how the choice of data isolation methods impacts system performance, scalability, maintenance ease, and overall security, exploring ways to improve the security and stability of multi-tenant systems.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2006.05a
• /
• pp.561-564
• /
• 2006

인터넷을 기반으로 하는 동호회의 모임은 매우 활성화되어 있으며, 대부분의 포탈 사이트에서도 '카페' 등과 같은 서비스명으로 동호회 모임을 지원하고 있다. 그러나 대부분의 동호회에서는 대규모 파일을 공유하기 위해서는 대규모 데이터 저장 공간의 부족 및 협소한 네트워크 등의 이유로 대규모 파일을 공유하는데 제약이 많다. 이에 본 논문에서는 인터넷 동호회 사이트에서 대규모 파일을 효과적으로 공유할 수 있도록 지원하기 위한 MAFI 시스템을 설계, 구현하였다.