• Proceedings of the Korean Information Science Society Conference
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• 2003.10c
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• pp.715-717
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• 2003

본 논문은 형태소 분석 기법과 전문가 시스템 제작 도구를 이용하여 표준 주소를 검색하기 위한 주소 보정 시스템의 구현에 대해 기술 한다. 즉, 주소가 가지는 특성을 고려하여 표준 주소에 대한 다양한 형태의 주소들을 각각 지역 단위의 의미를 가지는 형태소로 분리하고 전문가 시스템에서 정의된 규칙에 의해 주소 요소의 원형으로 변환하게 한다. 따라서, 각각 주소 요소의 원형으로 이루어진 보정된 주소는 데이터 베이스 상에 존재하는 표준 주소가 될 것이고 정확한 검색이 이루어진다. 이는 데이터 베이스에 축적된 해당 주소에 대한 새로운 정보를 참조하는데 활용될 수 있다.

• Journal of Korea Multimedia Society
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• v.13 no.6
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• pp.901-910
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• 2010

$IP^2$, as an extended concept of the next generation IMT network, is a concept of basically supporting mobility using two steps of IP address (i.e. IPha (IP Host address) and IPra (IP routing address)) in IP backbone network. Current $IP^2$system has a shortcoming of excess usage of network resources caused by sending paging messages to all cells in LA (Location Area) in paging procedure. Considering the evolving direction of network, which is taking mobility with various speed and integration of devices into consideration, this shortcoming must be overcome. In this paper, we proposed a method to reduce time and memory for paging by maintaining current information of MN (Mobile Node) not in Active state with proxy server. Performance evaluation based on NS-2 simulations has shown that the efficiency of network resources is improved in the proposed method.

• Journal of Korea Multimedia Society
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• v.13 no.2
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• pp.265-278
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• 2010

Most recent E-mail systems, that are serviced in Korea, are supporting Hangul in many fields of E-mail(For example, contents, subject, attachment, etc.). However, these systems do not support Hangul in the address field of E-mail. In 2003, IDNA built the international standard in order to support multi-lingual besides the alphabetic character, a number, and '-'. So, Hangul cab be used in the domain part where is the right of '@' mark among the compositional element of the E-mail address. But, the local-part, where is the left of '@' mark, doesn't still support multi-lingual. So Hangul cannot be used in the local-part. In order to support multi-lingual including Hangul in the local-part, this paper designs and implements the E-mail system according to the EAI standardization research that it is progressed in IETF.

• Convergence Security Journal
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• v.13 no.2
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• pp.95-100
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• 2013

As the near field communication technology's application scope tends to expand gradually in the various fields, application of mobile-based NFC(Near Field Communication) is increasing in the various types of technologies. The method which reads the URL address and supports access to the web site of the address if you touch the NFC device in the tag(RFID) that the URL address is stored was applied to the unmanned security system. It proposed the effective plan to manage mobilization security business in the aspects of Integrity, Damage, Real-Time, and Speed through comparison and verification of the method with the existing unmanned security system.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.68-71
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• 2012

본 논문은 운영 체제(Operating System)에서 수행되는 프로세스(Process)의 가상 주소 공간(Virtual Address Space)을 기존의 단일 가상 주소 공간에서 다중 가상 주소 공간으로 확장시켜서, 하나의 프로세스가 기존보다 더욱 넓은 가상 메모리 영역을 쉽게 사용할 수 있도록 해주는 방안을 제안한다. 최근 컴퓨팅 기기들은 비약적으로 증가한 메모리를 쉽게 사용할 수 있는 수단이 필요하다. 최근 PAE(Physical Address Extension)를 지원하는 32 비트 프로세서나 32 비트 명령어를 같이 지원하는 64비트 프로세서들은 프로세스의 가상 주소 크기보다 더욱 큰 용량의 메모리를 사용할 수 있어서, 한 프로세스가 장착된 메모리의 일부분 밖에 사용할 수 없는 일이 발생한다. 이를 해결하기 위해서 64비트 프로세서의 경우 64-비트 명령어를 사용하지만 이는 프로그램의 명령어 크기나 포인터 변수 크기의 증가로 메모리 사용량을 크게 늘릴 수 있어서 서버 컴퓨터나 데스크탑 PC 와 같이 충분한 양의 메모리를 장착한 시스템에서만 효과적이다. 본 논문에서 제안하는 다중 주소 공간을 지원하는 프로세스는 모바일 및 임베디드 기기와 같이 상대적으로 제한된 용량의 메모리를 지원하는 시스템에 유용할 것으로 기대한다.

• Journal of Information Technology Services
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• v.22 no.1
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• pp.43-56
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• 2023

With the development of the e-commerce market, various types of products continue to be released. However, customers face an information overload problem in purchasing decision-making. Therefore, personalized recommendations have become an essential service in providing personalized products to customers. Recently, many studies on GCN-based recommender systems have been actively conducted. Such a methodology can address the limitation in disabling to effectively reflect the interaction between customer and product in the embedding process. However, previous studies mainly use implicit feedback data to conduct experiments. Although implicit feedback data improves the data scarcity problem, it cannot represent customers' preferences for specific products. Therefore, this study proposed a novel model combining explicit and implicit feedback to address such a limitation. This study treats the average ratings of customers and products as the features of customers and products and converts them into a high-dimensional feature vector. Then, this study combines ID embedding vectors and feature vectors in the embedding layer to learn the customer-product interaction effectively. To evaluate recommendation performance, this study used the MovieLens dataset to conduct various experiments. Experimental results showed the proposed model outperforms the state-of-the-art. Therefore, the proposed model in this study can provide an enhanced recommendation service for customers to address the information overload problem.

• Journal of Digital Convergence
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• v.10 no.3
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• pp.127-135
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• 2012

This study improves the existing user identification method using user ID and password. The new protocol protecting unauthorized access is designed and developed using user's ID, password, and OTP for user certification as well as MAC address for computer identification on networks. The safety on trials of unauthorized certification is tested and analyzed for four types following the criterion of information acquisition.

• Spatial Information Research
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• v.13 no.2 s.33
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• pp.185-194
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• 2005

The purpose of this study is to create address standardization through an Algorithm based on cadastral maps, as well as to establish a method of transforming one information area to all of the domestic areas in relation to the geographic information system. To do this, it analyzed the current level of e-government cadastral data and their integration strategy with addresses of both the administrator and the cadastral data. This study will provide a more efficient method for co-operative work between private sector and public sector. In addition, we can expect that the information strategy of local government will become more active.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.45 no.3
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• pp.94-100
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• 2008

It is necessary to develop the flash memory system software FTL(Flash Translation Layer) which is used in mobile storage like Compact Flash memory. In this paper, we design the FTL using clustered hash table and two phase software caching method to translate logical address into physical address fastly. The experimental results show that the address translation performance of CFTL is 13.3% higher than that of NFTL and 8% higher than that of AFTL, and the memory usage of CFTL is 75% smaller than that of AFTL.

• Structural Engineering and Mechanics
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• v.78 no.3
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• pp.369-378
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• 2021

This paper reviewed a few output-only system identification algorithms and identified the shortcomings of those popular blind source separation methods. To address the issues such as less sensors than the targeted modal modes (under-determinate problem), repeated natural frequencies as well as systems with complex mode shapes, this paper proposed a complex wavelet modified second order blind identification method (CWMSOBI) by transforming the time domain problem into time-frequency domain. The wavelet coefficients with different dominant frequencies can be used to address the under-determinate problem, while complex mode shapes are addressed by introducing the complex wavelet transformation. Numerical simulations with both high and low signal-to-noise ratios validate that CWMSOBI can overcome the above-mentioned issues while obtaining more accurate identified results than other blind identification methods.