• The KIPS Transactions:PartA
• /
• v.12A no.5 s.95
• /
• pp.427-432
• /
• 2005

I studied about existent load distribution algorithms and the WLC(Weighted Least Connection) algerian that is using much at present to distribute the connection request of users to real servers efficiently in web cluster system. The efficiency of web cluster system is fallen by load imbalance between servers, because there is problem In inaccurate load status measuring of servers and measuring timing at these load distribution algorithms. In this paper, I suggest an algorithm that distributes load base on various load state of servers by real time using broadcasting RPC(Remote Procedure Call) when a user requests connection, and implement a prototype and experiment its performance. The experiment result shows that load imbalance phenomenon between reai sowers was improved greatly than existing method, and performance of web cluster system was improved by efficiency that response time is shortened.

• JOURNAL OF ELECTRICAL WORLD
• /
• s.301
• /
• pp.68-73
• /
• 2002

미쓰비시(삼릉)전기는 1999년 5월치바현 이치가와시 동빈에$''$특정가정용기기재상품화법(통칭 : 가전리사이클법)$''$에 대응하기 위하여 일본국내 최초의 전기제품 리사이클 플랜트를 가동시켰다. 이 플랜트에서는 종합전기메이커로서의 특징을 살려 연소를 수반하지 않는 철저한 머티어리얼 리사이클, 물을 쓰지 않는 완전건식에 의한 소재(素材)의 분리$\cdot$분별(分別)을 실현하였다. 최대의 특징은 수(手)작업에 의한 부분분해와 기계분해(파쇄에 의한 소재분리)를, 리사이클률, 경제성, 환경부하성의 3가지 관점에서 조화를 시키고 있는 점이다. 본고에서는 리사이클 플랜트의 개요를 소개하고 리사이클률 향상과 리사이클 처리비용 저감을 위해 대처해 온 다음의 3개 항목에 대하여 기술한다. (1) 플라스틱찌꺼기(殘材) 리사이클설비의 개발 주파쇄분리(主破碎分離) 프로세스에서 배출되는 금속과 염화비닐을 포함한 플라스틱찌꺼기를 처리하여, 플라스틱을 고로환원재(高爐還元材)로서 유효 활용할 수 있도록 하였다. (2)효율적인 물류(物流)레이아웃 및 수해체방식(手解體方式)의 설계 공장내의 폐제품(廢製品)$\cdot$분별물(分別物)에 대한 보관장소, 반송수단$\cdot$경로를 최적 설계하여 처리비용을 요하는 수해체 작업을 효율적으로 할 수 있도록 업무흐름을 설계하였다. (3)리사이클공장 관리시스템의 구축 공장관리의 효율화와 배출자(排出者)에 대한 리사이클정보가 분명하게 나타날 수 있게 하기 위하여 리사이클공장관리시스템을 개발하여 도입하였다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.15 no.10 s.89
• /
• pp.996-1004
• /
• 2004

1-Dimensional Cluster-Based Sequence Equalizer(1-D CBSE) lessens computational load, compared with the classic maximum likelihood sequence estimation(MLSE) equalizers, and has the superiority in the nonlinear channels. In this paper, we proposed an algorithm of searching for optimal training sequence that estimates the cluster centers instead of time-varying multipath fading channel estimation. The proposed equalizer not only resolved the problems in 1-D CBSE but also improved the bandwidth efficiency using the shorten length of taming sequence to improve bandwidth efficiency. In experiments, the superiority of the new method is demonstrated by comparing conventional 1-D CBSE and related analysis.

• Annual Conference of KIPS
• /
• 2009.04a
• /
• pp.1233-1236
• /
• 2009

현재 다량의 네트워크 대역폭을 소모하는 응용 프로그램 트래픽을 확인하고 분류하는데 많은 방법들이 사용되고 있지만 정통적인 트래픽 분류 방법론인, 포트 번호, ip 등 등의 헤더 정보만으로는 응용 프로그램의 트랙픽을 정확하게 분류하지 못한다. 최근 동적인 포트 번호를 사용하는 새로운 트래픽 응용의 등장과 방화벽을 통과하기 위한 포트번호 변경으로 인하여 전통적인 TCP/UDP 헤더 기반의 트랙픽 분류 방법은 부정확해지고 있다. 이러한 트래픽을 정확하게 식별하고 분류하기 위해서는 패킷의 페이로드 내용에 대한 조사도 병행되어야 하고 시그니처 기반의 식별 방법을 사용하여야 한다. 하지만 이 방법은 정확도가 높은 반면 시그니처의 목록을 매번 최신 상태로 유지하여야 하는 단점과 길어지는 탐색 시간에 따른 시스템 부하의 문제를 가지고 있다. 본 연구에서는 이러한 단점을 향상시키는 목적으로 새로운 시그니처 기반의 해쉬 테이블에 캐시를 이용한 방법론인 효율적인 알고리즘을 제안하고 시그니처의 자료구조와 실제 패킷과 시그니처의 비교 방식을 수정함으로써 효율성을 높이는데 목적을 두고 있다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2023.07a
• /
• pp.269-272
• /
• 2023

본 논문은 디지털 플랫폼과 헬스케어 서비스를 통합한 병원 애플리케이션(병원 앱)의 개발 및 활용에 초점을 맞춘다. 목표는 환자와 의료 제공자 간의 의사 소통과 효율성을 향상시키는 것이다. 이 연구는 병원 앱의 주요 기능과 이점을 탐색하고, React Native를 사용하여 기술적 측면과 디자인 원칙을 제공하고, 적절한 사용 및 보안을 위한 지침을 검토한다. 이 연구는 병원 앱의 잠재력과 장점을 평가하고 의료 서비스 효율성과 품질을 향상시키기 위한 실용적인 지침을 제공하고 있다. 병원 앱의 통합으로 환자 치료, 커뮤니케이션을 개선하고 의료 프로세스를 간소화할 수 있다. React Native와 같은 기술을 활용하여 약속 일정, 예약 확인, 의료 정보 액세스, 의료 전문가 디렉토리와 같은 기능을 구현하여 포괄적인 사용자 경험을 제공할 수 있다. 지침과 규정을 준수하는 것은 의료 데이터의 적절한 사용과 보호를 보장하는 데 필수적이다. 향후 연구에서는 인공 지능 및 원격 의료와 같은 신기술을 병원 앱에 통합하고 장기적인 영향을 평가할 수 있다. 이 분야의 지속적인 개발과 혁신은 디지털 시대에 의료 서비스를 변화시킬 잠재력을 가지고 있다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.19 no.1
• /
• pp.577-586
• /
• 2018

In this study, traffic safety technology was developed for rural areas by reviewingthe relevant literature and data from the Traffic Accident Analysis System for the Chungcheong region.The goal is to reduce traffic accidents in small regional cities and rural areas in Korea. A road shoulder recognition light was developed to fit the pedestrian characteristics of the people using transportation in rural areas. It also minimizes damage to crops due to light pollution from traffic lights and street lights, and it supplements problems of damage from collision with vehicles and agricultural machines. The efficiency of the technology developed in this study was verified by comparing and analyzing the number of traffic accidents and the saved cost before and after its installation. A test bedwas established based on rural areas and is being evaluated for its applicability and effectiveness. It is expected that the reliability of such facilities could be improved through continuous studies, data collection, and analysis.

• The KIPS Transactions:PartD
• /
• v.15D no.3
• /
• pp.297-304
• /
• 2008

Due to the proliferation of the Internet and intranet, new application domains such as stream data processing have emerged. Stream data is real-timely and continuously generated. In stream data environments, a lot of queries are registered, and then, the arrived data item is evaluated by registered queries. Thus, to accelerate the query performance, diverse continuous query index schemes have been proposed for stream data processing systems. In this paper, we focus on the query index technique for stream data. In general, a stream query contains the range condition. Thus, by using range conditions, the queries can be indexed. In this paper, we propose an efficient query index scheme, called QUISIS, using a modified Interval Skip Lists to accelerate search time. QUISIS utilizes a locality where a value which will arrive in near future is similar to the current value. Through the experimental study, we show the efficiency of our proposed method.

• The Journal of the Korea Contents Association
• /
• v.17 no.7
• /
• pp.133-143
• /
• 2017

The objective of this study is to examine whether citizens' expectations of policy impacts of the government's efforts to reduce overlap and duplication among its programs have any influence on citizens' policy attitude. Furthermore, this study examines whether the influence is differential and dependent on income class differences. The results suggest that 'reducing budget waste' bas a positive impact on policy attitude whereas 'enhancing work performance' bad no significant impact. And the results reveal that middle class bold a more negative view than upper class on the government's efforts. Concerning the moderating effect. income class differences weaken the positive relationship between 'reducing budget waste' and policy attitude as well the negative relationship between 'enhancing work performance' and policy attitude. The policy implication of this study is, to gain support from citizens for its overlap and duplication reduction policies, it is critical that the government should publicize that there exists a more of citizens benefitting from such policies.

• KIISE Transactions on Computing Practices
• /
• v.22 no.12
• /
• pp.632-645
• /
• 2016

The enterprise environment, various interface systems are utilized for business processes and for exchange of messages. In the interface communication environment, as business complexity increases, the interface system is connected with numerous systems. With increasing number of linked systems, there is a proportional increase in the workforce, leading to a rise in numerous risks (inconsistency of information, non-compliance with standards, etc.). To solve the problem, we propose a system for managing and centralizing information of the message based interface system. The proposed system enables information integration management, message information distribution, standard code generation, risk management and risk evasion. Using the proposed system, the in development environment user can prevent inconsistent information, analyze risk, avoid risk, distribute information automatically and create a standard code. Ultimately, there is an increase in user productivity and it is possible to evade the risks involved.

• Journal of Service Research and Studies
• /
• v.7 no.4
• /
• pp.69-81
• /
• 2017

Smart work refers to enhancing the efficiency of work by utilizing smart devices. Smart work improves business productivity by improving business productivity of companies, reducing costs, but there is a threat to various information protection. To operate telecommuting, mobile office, and smart work center, hardware and software are needed to support various network resources, servers, and platforms. As a result, there are many vulnerabilities to security and information protection that protect information resources. In this paper, we analyze the smart work environment for smart work service and analyze vulnerability for smart work information protection through analysis of IOS27001 and KISA-ISMS. We have developed requirements for information protection requirements for users and service providers. We have developed a solution for information security protection for smart work environments such as common parts, mobile office, telecommuting, and smart work center for security threats and weaknesses per smart work type.