• 융합정보논문지
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• 제9권2호
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• pp.17-22
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• 2019

캐시는 클라이언트의 응답 시간을 향상 시켜 대역폭을 줄여 효과적인 면을 보이는 기법이다. 하지만 캐시 기법이 어느 기법들과 같이 취약점이 존재한다. 웹 캐시는 편리성이 있지만 해킹에 악용되어 문제가 발생할 가능성이 있다. 웹 캐시의 문제점은 주로 캐시 미스와 과도한 캐시 선인출로 인해 발생한다. 캐시 미스가 높고 과도하게 선인출을 하게 되면 캐시는 오히려 취약점이 되어 안전한 데이터를 변형 시키는 등 오류를 발생시키며 사용자의 클라이언트와 시스템 모두 문제가 생기게 된다. 사용자는 캐시 감염, 오류의 대응책을 미리 숙지를 하게 된다면 더 이상 캐시에 관한 오류, 감염 발생에 문제점을 느끼지 못하게 될 것이다. 따라서 본 연구서는 네 가지의 캐시 감염, 오류에 대한 대응책을 사용자에게 제안하여 웹캐시 감염에 대한 대응책을 제시하였다.

• 예술인문사회 융합 멀티미디어 논문지
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• 제7권6호
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• pp.827-837
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• 2017

스마트 홈 분야가 주목받고 있음에 따라 하나의 컨트롤러로 다양한 전자제품을 통합적으로 제어하기 위한 연구가 진행되어 왔다. 기존 연구들은 별도의 범용 컨트롤러나 리모컨 역할을 하는 애플리케이션을 개발하고 제품별 제어 화면을 구성하여 전자제품을 제어하는 방식이다. 그러나 이러한 방식들은 전용의 컨트롤러를 개발해야 하고 전자제품마다 별도의 제어 화면을 구성하여 전자제품을 제어하기 때문에 다양한 전자제품을 제어하기에는 적합하지 않다. 본 논문에서는 웹 기반의 원격제어 플랫폼을 제안한다. 다양한 전자제품의 사용자 인터랙션을 분류하여 여러 장치에서 적용 가능한 범용 사용자 인터페이스를 정의하고 API로 구현한다. 제안하는 API를 IPTV와 자동차 내비게이션 장치에 적용하여 웹 브라우저만 있으면 제어가 가능함을 확인한다. 또한, 연속적인 제어 요청을 효율적으로 처리하기 위하여 다수의 제어 요청을 그룹핑하는 기법을 제안하고 응답시간과 데이터 사용량의 개선을 확인한다.

• Earthquakes and Structures
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• 제3권2호
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• pp.181-201
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• 2012

The benchmark on the ASCE cable-stayed bridge has gathered since its proposal the interest of many specialists in the field of the structural control and the dynamic response of long span bridges. Starting from the original benchmark statement in the MATLAB framework, a refined version of the bridge model is developed in the ANSYS commercial finite element environment. A passive structural control system is studied through non linear numerical analyses carried out in time domain for several seismic realizations in a multiple support framework. An innovative electro-inductive device is considered. Its positive performance is compared with an alternative version considering traditional metallic dampers.

• 품질경영학회지
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• 제18권2호
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• pp.54-68
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• 1990

Contingency response in a FMS system requires that the system be able to identify and evaluate a number of alternatives. This paper is outlined that DSS completes with a problem processor in corporating Timed Petri Nets model, and a data base system. DSS enables the FMS user to get the maximum benefit from a FMS. The structure of this DSS parallels the organizational activities involved in running the FMS. In designing a shop floor controller for FMS, interactions between the different real time, discrete event functions must be established. The specification of the machine tool and material handling system functions working as a concurrent and cooperative system is given in terms of Timed Petri Nets. In addition, the basic concepts and uses of Petri Nets are surveyed. The system to be studied is first modelled by a Timed Petri Nets and then procedure for evaluating the FMS system performance are presented. Numerical examples are studied to illustrate a session of the FMS used-DSS interaction.

• 한국음향학회:학술대회논문집
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• 한국음향학회 2004년도 추계학술발표대회논문집 제23권 2호
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• pp.283-286
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• 2004

Due to advances in electronics very high quality audio reproduction is today possible. But the listening environment causes deviation of the audio system from the expected behavior. Firstly the listening Room significantly changes the audio signal frequencies and their phase. Secondly the position of the user in the room affects the perceived sound. With existing DSP technology it is possible to adequately correct these effects. In our work we developed a room correction system, correcting up to 7.1 channels using dual Motorola 56367 fixed point DSP's, implementing position dependent room effects measurement, real time compensation filter design and equalization filtering procedures.

• 한국생물정보학회:학술대회논문집
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• 한국생물정보시스템생물학회 2003년도 제2차 연례학술대회 발표논문집
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• pp.236-244
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• 2003

Summary: The analysis of human genetic variation is one of the key issues far the understanding of the different drug response among individuals and many programs are developed for this purpose. However, current publicly available programs have so many limitations such as time complexity problem for the analysis of large amount of alleles or SNPs, difficult manipulation for installation, data import, and usage, and low-quality visual output. Here we present workbench for SNP anlaysis, SNPAnalyzer. SNPAnalyzer consists of 3 main modules: 1)Hardy-Weinberg Equilibrium ,2) Haplotype Estimation, and 3) Linkage Disequilibrium. Each module has several different widely-used algorithms for the extensive analysis and can handle large amount of alleles and SNPs with simple format. Analysis results are displayed in user-friendly formats such as table, graph and map. SNPAnalyzer is developed using C and C$^{++}$ and users can easily access through web-interftce. Availability: SNPAnalyzer can be freely implemented at http://www.istech.info/istech/board/login_form.jsp

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2001년도 춘계학술대회 논문집
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• pp.529-532
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• 2001

A Remote Monitoring Server(RMS) server which uses Internet and World Wide Web is constructed for SMD in-line system. Hardware base consists of server computer, virtual SMD in-line system and other computers. Software includes assignment of server, RDBMS and various modules in server home page. Web browser provide production quantity, bad PCB quantity, error number and error message in virtual SMD module, user information in setup module, detailed error information in fault diagnosis module, fault history in fault history module and customer information in customer service management module. These functions of the RMS helps a decrease of non-operation time and a service response as fast as possible.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 심포지엄 논문집 정보 및 제어부문
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• pp.159-161
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• 2006

The peer-to-peer (P2P) systems have Brown significantly over last few years due to their hish potential of sharing various resources. Super-peer based P2P systems have been found very effective by dividing the peers into two layers, SP (Super-Peer) and OP (Ordinary-Peer). In this paper, we present ISP2P (Intelligent Super-peer based P2P system), which allows us to choose the best SP. Through analyzing capacity and similarity between SP and OP, we can help OPs to select the most appropriate SP respectively. Proposed system can improve the performance of the average response time by superior SP, reduce the bandwidth cost by small path length due to content similarity and solve frequent SP replacement problem by considering similarity of user behavior.

• Asia pacific journal of information systems
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• 제15권1호
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• pp.1-24
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• 2005

The purpose of this study is to identify the factors affecting the performance of knowledge management systems. To extend DeLone & MeLean's model, we included the user specialization in the information systems success model. The questionnaires are collected from 109 knowledge management system users. The major findings are summarized as followed. First, system characteristics such as ease of use, response time, and knowledge management process support affect the knowledge management systems usage. Second, knowledge characteristics such as relevancy, completeness, reliability, importance, and currency also affect the knowledge management systems usage. Third, the end-users are satisfied with the knowledge management systems because it is easy to use and relevant.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.275-276
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• 2006

An intelligent arm-wrestling system is recently developed in our laboratory that is comprised of an arm-force generation mechanism and a control system that detects the maximum arm-force of a user in the early stage of the match, generates a different game scenario each time, and executes force feedback control to implement the scenario. This paper presents the mathematical model of the force control system of the intelligent arm-wrestling system, and some improvements of it via experimental frequency responses using a control signal analyzer.