• The Journal of the Korea institute of electronic communication sciences
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• v.3 no.2
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• pp.71-78
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• 2008

The sensor node's performance is expected to be improved and the price will be largely decreased. As USN-applied field is expanded, multiple application services are expected to be provided through one USN soon. Multiple applications be required a periodic data reporting, consecutive information monitoring, event-driven data and query-based data as the data pattern that USN is delivered. Accordingly, the mechanism which can assure QoS according to each data characteristic is required. In this paper, A proposed protocol apply the duty cycle of S-MAC protocol variably and flexible according QoS level. This method largely reduces the delay on the delay-sensitive traffic, while keeping the energy efficiency.

• Journal of Advanced Navigation Technology
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• v.13 no.3
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• pp.438-447
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• 2009

Digital home devices aims at providing the multimedia service which is not limited at time and space in home network environment. However, it is incapable of the fair use of consumers who legally buys contents, and causes damage to the contents providers owing to the indiscriminate distribution and use of illegal contents. DRM system appeared to solve this problem cannot protect the license stored on digital home devices and manage license by redistribution. This paper proposes a license audit model which makes an inspection of illegal access, modification and redistribution and reports alert logs to server.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.409-412
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• 2006

빠르게 변화하는 시장 및 기업 간의 경쟁 환경에서 기업의 의사결정권자들은 보다 신속한 의사결정을 내려야 하고, 의사결정의 위험을 최소화해야 하는 무거운 중책이 새롭게 추가 되었다. 이에 비즈니스 인텔리전스는 주로 고차원의 분석을 필요로 하는 시장분석가나, IT조직의 소수 멤버들을 위한 여러가지 BI툴을 제공 하였다. 과거의 비즈니스 인텔리전스 제품 가격이나 솔루션 구축에 따른 비용은 사용자가 적음에도 불구하고 만만치 않았다. 최근 들어, 환경 변화와 사용자의 요구의 다양성에 따라 기업 내의 많은 사용자들은 데이터를 분석하길 원한다. 또한 기업의 업무를 보다 원할히 진행시키기 위해 많은 의사결정이 하부조직에서 이루어지고 있으며, 그에 따라 현장 직원들에게 의사결정에 대한 책임이 부과되고 있다. 또한 BI 제품의 데이터 저장소의 기술차이에 따라 호환성이 떨어지는 플랫폼을 기반으로 보고서를 작성하였다. 이에 본 논문에서는 XMLA 웹서비스를 이용하여 다중 플랫폼을 지원하는 자바 기반의 리포팅 툴과 연동 가능한 OLAP/데이터마이닝 비즈니스 인텔리전스 툴을 제안한다. 구현 시스템은 다양한 형태로 표현 가능한 프론트엔드 툴을 제공함으로써 최종 사용자의 편의성을 제공하며 BI의 기능을 지원한다.

• CRM연구
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• v.4 no.1
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• pp.55-68
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• 2011

Recently with the development of Web services by utilizing a variety of web content, the studies on user experience and personalization based on web usage has attracted much attention. Majority of personalized analysis are have been carried out based on existing data, primarily using the database and statistical models. These approaches are difficult to reflect in a timely mannerm, and are limited to reflect the true behavioral characteristics because the data itself was just a result of customers' behaviors. However, recent studies and commercial products on web analytics try to track and analyze all of the actions from landing to exit to provide personalized service. In this study, by analyzing the customer's click-stream behaviors, we define U-Score(Usage Score), P-Score (Preference Score), M-Score(Mania Score) to indicate variety of customer preferences. With the devised three indicators, we can identify the customer's preferences more precisely, provide in-depth customer reports and customer relationship management, and utilize personalized recommender services.

• Proceedings of the Korea Contents Association Conference
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• 2007.11a
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• pp.591-594
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• 2007

We construct the test process site about X-Internet and X-Forms base software. This software is developed with X-Forms base web UI tool. Basically, this software is operated on the Client. Even in operating process, this kind of software could be updated because of user's request, improvement in efficiency, reformation and addition in functions and so on. In order to test a updated software, V-Model will be extended and transformed test process will be proposed. This proposed test process is starting with test plan which defines test object and activities for attainment of process's goal. The following steps are recognizing testcase and data, analysis and design for constructing process environment, setting forth testcase in detail, realization of test methodology, and the arrangement of results. This paper will be helpful to build more efficient process site by managing and recording the test process.

• Journal of the Korea Convergence Society
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• v.8 no.10
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• pp.29-35
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• 2017

In this paper, we describe certificate policy and characteristics in cooperation condition with Cooperative intelligent transport system and autonomous driving vehicle. Among the authentication functions of the vehicle, there is a pseudonym authentication function. This pseudonymity is provided for the purpose of protecting the privacy of information that identifies the vehicle driver, passenger or vehicle. Therefore, the purpose of the pseudonym certificate is to be used for reporting on BSM authentication or misbehavior. However, this pseudonym certificate is used in the OBE of the vehicle and does not have a cryptographic key. In this paper, we consider a method for managing a pseudonym authentication function, which is a key feature of the pseudonym certificate, such as location privacy protection, pseudonym function, disposition of linkage value or CRL, request shuffling processing by registry, butterfly key processing, The authentication policy and its characteristics are examined in detail. In connection with the management of pseudonymes of the vehicle, the attacker must record the BSM transmission and trace the driver or vehicle. In this respect, the results of this study are contributing.

• Journal of Advanced Navigation Technology
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• v.22 no.5
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• pp.467-471
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• 2018

During the fourth industrial revolution, the amount of data available to users has surged. And it became a stepping stone for various convergence technologies such as ECMA script, WebAssembly, and web of things using web technology. Also, as the amount of data shared on the web increases, the web has emerged as the most influential media in modern life. As a result, web developers have tried to deliver data quickly over the Web. So, various web application analysis tools appeared, and developers tried to find a solution to solve the speed problem by analyzing the web application. However, the performance of web application analysis tools has not improved significantly. Most existing analytical tools require direct installation, require expertise on the Web to perform analysis, and do not have function to analysis new technologies such as WebAssembly. Therefore, in this paper, we propose the design of a new reporting solution that can solve problems of existing web application analysis tool.

• Journal of Satellite, Information and Communications
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• v.11 no.2
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• pp.36-41
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• 2016

In order to take advantage of the building as an energy demand resources, it requires automated systems that can respond to the demand response event. Load aggregator has been started business in Korea, research and development of building energy management and demand response systems that can support them has been active recently. However, the ratio of introducing automated real-time demand response systems is insufficient and the cost is also high. In this research, we developed a building energy management system and OpenADR protocol to participate in a demand response and then evaluated them in real building. OpenADR is a standard protocol for automated system through the event and reporting between load aggregator and demand-side. In addition, we also developed a web-based building control system to embrace different control systems and to reduce the peak load during demand response event. We verified that the result systems are working in a building and the reduced load is measured to confirm the demand response.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.43 no.1
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• pp.1-6
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• 2020

Fast service access involves keeping track of the location of mobile users, while they are moving around the mobile network for a satisfactory level of QoS (Quality of Service) in a cost-effective manner. The location databases are used to keep track of Mobile Terminals (MT) so that incoming calls can be directed to requested mobile terminals at all times. MT reporting cell system used in location management is to designate each cell in the network as a reporting cell or a non-reporting cell. Determination of an optimal number of reporting cells (or reporting cell configuration) for a given network is reporting cell planning (RCP) problem. This is a difficult combinatorial optimization problem which has an exponential complexity. We can see that a cell in a network is either a reporting cell or a non-reporting cell. Hence, for a given network with N cells, the number of possible solutions is 2^N. We propose a biogeography based optimization (BBO) for design of mobile station location management system in wireless communication network. The number and locations of reporting cells should be determined to balance the registration for location update and paging operations for search the mobile stations to minimize the cost of system. Experimental results show that our proposed BBO is a fairly effective and competitive approach with respect to solution quality for optimally designing location management system because BBO is suitable for combinatorial optimization and multi-functional problems.

• Journal of Korea Game Society
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• v.18 no.5
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• pp.23-30
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• 2018

With the development of ICT technology, the game industry is growing rapidly. However, due to the excessive play of the game, there are cases where normal life is difficult. It is necessary to study the diagnosis and countermeasures against such game addiction. This paper study a system for diagnosing game addiction based on game usage information of game users. In order to develop a game addiction diagnostic system, this study classifies game addiction and abuse users and collects and models log information in real game environment. In addition, the addiction and good use model of game users was used as a knowledge to diagnose the addiction of new game users. Through the experiment, we could confirm the meaningful results. Also, according to the result of the diagnosis, the service such as SMS and reporting was suggested.