• Title/Summary/Keyword: User Response Time

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A User-Centric Response Time Analyzer for Improving User Experience of Android Applications (스마트폰 응용 프로그램의 사용자 경험 향상을 위한 사용자 중심 반응 시간 분석 도구)

  • Song, Wook;Sung, Nosub;Kim, Jihong
    • KIISE Transactions on Computing Practices
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    • v.21 no.5
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    • pp.379-386
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    • 2015
  • We propose a novel user-perceived performance optimization framework for the Android platform that takes advantage of the user-centric response time analysis. To this end, we propose a new definition of response time, which we call the user-centric response time, as a metric for the quality of user-perceived performance of the smartphone application. In this paper, we describe the design and implementation of an on-line user-centric response time analyzer for Android-based smartphones, which provides smartphone application developers with valuable insight for user-perceived performance optimization. We implemented the user-centric response time analyzer on the Android platform, version 4.0.4 (ICS) running on a Galaxy Nexus smartphone. From our experimental results, the proposed user-centric response time analyzer accurately estimates user-centric response times with an accuracy of 92.0% compared to manually measured times with less than 1% performance penalty. In order to evaluate the efficiency of the proposed framework, we were able to reduce the user-centric response time of the target application by up to 16.4% based on the evaluation results by the proposed framework.

A Decreasing Methodology of User Response Time - Mainly Focused On SAP R/3 System (튜닝을 통한 User Response Time 감소 기법 - SAP R/3 ERP System 을 중심으로)

  • Lee, Jung-Jae;Song, Gwann-Ho;Choi, Jin-Young
    • Proceedings of the Korea Information Processing Society Conference
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    • 2007.05a
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    • pp.625-628
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    • 2007
  • 갈수록 복잡화, 대량화되고 있는 시스템의 성능은 유지하면서 User Response Time 을 단축시키는 Tuning 은 투자 대비 이익률(ROI : Return On Investment)에 탁월한 효과를 가져온다는 점에서 중요시 되고 있다. 본 연구는 SAP R/3 System 환경에서 Tuning 통한 User Response Time 감소를 위하여 Query 분석 및 Table Index 생성, Program Logic 수정, Parallel Processing, SAP R/3 System 의 고유 기능인 Notes 적용을 통한 User Response Time 감소 기법을 제시한다.

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An Exploratory Analysis on the User Response Pattern and Quality Characteristics of Marketing Contents in the SNS of Regional Government (지역마케팅 콘텐츠의 사용자 반응패턴과 품질특성에 관한 탐색적 분석: 지방자치단체가 운영하는 SNS를 중심으로)

  • Jeong, Yeon-Su;Jeong, Dae-Yul
    • The Journal of Information Systems
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    • v.26 no.4
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    • pp.419-442
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    • 2017
  • Purpose The purpose of this study is to explore the pattern of user response and it's duration time through social media content response analysis. We also analyze the characteristics of content quality factors which are associate with the user response pattern. The analysis results will provide some implications to develop strategies and schematic plans for the operator of regional marketing on the SNS. Design/methodology/approach This study used mixed methods to verify the effects and responses of social media contents on the users who have concerns about regional events such as local festival, cultural events, and city tours etc. Big data analysis was conducted with the quantitative data from regional government SNSs. The data was collected through web crawling in order to analyze the social media contents. We especially analyzed the contents duration time and peak level time. This study also analyzed the characteristics of contents quality factors using expert evaluation data on the social media contents. Finally, we verify the relationship between the contents quality factors and user response types by cross correlation analysis. Findings According to the big data analysis, we could find some content life cycle which can be explained through empirical distribution with peak time pattern and left skewed long tail. The user response patterns are dependent on time and contents quality. In addition, this study confirms that the level of quality of social media content is closely relate to user interaction and response pattern. As a result of the contents response pattern analysis, it is necessary to develop high quality contents design strategy and content posting and propagation tactics. The SNS operators need to develop high quality contents using rich-media technology and active response contents that induce opinion leader on the SNS.

User Experience Assisted Energy-Efficient Software Design for Mobile Devices on the big.LITTLE Core Architecture (사용자 경험을 기반으로 big.LITTLE 멀티코어 구조의 스마트 모바일 단말의 에너지 소비를 최적화 하는 소프트웨어 구조 설계)

  • Lim, Sung-Hwa
    • Journal of the Semiconductor & Display Technology
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    • v.19 no.1
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    • pp.23-28
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    • 2020
  • In Smart mobile devices embedding big.LITTLE architectures, the conventional multi-core assignment scheme for user applications may incur wasteful energy consumption and long response time. In this paper, we propose a user experience assisted energy-efficient multicore assignment scheme. Our simulation results show that the proposed scheme achieves at 40% less energy consumption and at 20% less response time comparing to the legacy scheme.

PC User Authentication using Hand Gesture Recognition and Challenge-Response

  • Shin, Sang-Min;Kim, Minsoo
    • Journal of Advanced Information Technology and Convergence
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    • v.8 no.2
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    • pp.79-87
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    • 2018
  • The current PC user authentication uses character password based on user's knowledge. However, this can easily be exploited by password cracking or key-logging programs. In addition, the use of a difficult password and the periodic change of the password make it easy for the user to mistake exposing the password around the PC because it is difficult for the user to remember the password. In order to overcome this, we propose user gesture recognition and challenge-response authentication. We apply user's hand gesture instead of character password. In the challenge-response method, authentication is performed in the form of responding to a quiz, rather than using the same password every time. To apply the hand gesture to challenge-response authentication, the gesture is recognized and symbolized to be used in the quiz response. So we show that this method can be applied to PC user authentication.

A data prefetching scheme to improve response time of Video Streaming service (비디오 스트리밍 응답 시간 개선을 위한 데이터 사전 배치 방법)

  • Min, Ji-won;Mun, Hyun-su;Lee, Young-seok
    • KNOM Review
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    • v.22 no.1
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    • pp.52-59
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    • 2019
  • As the video streaming service are supported by various devices, the amount of usage increases and efforts to improve the service from the viewpoint of users have continued. When a user watches a video, a response time occurs from input to playback, and if this response time becomes longer, the user's service satisfaction decreases. In this paper, we are proposing a method prefetching each user's preference video data obtained by analyzing user's past history record to the device for reducing the response time. We will show the result that prefetching data can improve the response time to 41% at most. And we analyzed real-video streaming viewing record and got each user's preferred video list. We investigated the change of response time according to a hit-ratio and amount of overhead data that was prefetched to the device, but not viewed. It was shown that as the hit-ratio grows bigger, the improvement of response time becomes more effective.

System Infrastructure of Efficient Web Cluster System to Decrease the Response Time using the Load Distribution Algorithm (부하분산 알고리즘을 적용하여 반응시간을 감소시키는 웹 클러스터 시스템 구축)

  • Kim Seok-chan;Rhee Young
    • Journal of KIISE:Computing Practices and Letters
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    • v.10 no.6
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    • pp.507-513
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    • 2004
  • In this paper, we consider the methodology of efficient resource usage, specially web clustering system. We develope an algorithm that distributes the load on the web cluster system to use the system resources, such as system memory equally. The response time is chosen as a performance measure on the various clustering models. And based on the concurrent user to the web cluster system, the response time is also examined as the number of users increases. Simulation experience with this algorithm shows that the response time seems to have a good results compare to those with the other algorithm. And, also the effectiveness of clustered system becomes better as long as the number of concurrent user increases. The usage of developed algorithm is more useful when the system consists of many different sub-systems, a heterogeneous clustering system.

Oil Spill Response System using Server-client GIS

  • Kim, Hye-Jin;Lee, Moon-Jin;Oh, Se-Woong
    • Journal of Navigation and Port Research
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    • v.35 no.9
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    • pp.735-740
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    • 2011
  • It is necessary to develop the one stop system in order to protect our marine environment rapidly from oil spill accident. The purpose of this study is to develop real time database for oil spill prediction modeling and implement real time prediction modelling with ESI and server-client GIS based user interface. The existing oil spill prediction model cannot provide one stop information system for public and government who should protect sea from oil spill accident. The development of multi user based information system permits integrated handling of real time meteorological data from external ftp. A server-client GIS based model is integrated on the basis of real time database and ESI map to provide the result of the oil spill prediction model. End users can access through the client interface and request analysis such as oil spill prediction and GIS functions on the network as their own purpose.

Impact of User Convenience on Appliance Scheduling of a Home Energy Management System

  • Shin, Je-Seok;Bae, In-Su;Kim, Jin-O
    • Journal of Electrical Engineering and Technology
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    • v.13 no.1
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    • pp.68-77
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    • 2018
  • Regarding demand response (DR) by residential users (R-users), the users try to reduce electricity costs by adjusting their power consumption in response to the time-varying price. However, their power consumption may be affected not only by the price, but also by user convenience for using appliances. This paper proposes a methodology for appliance scheduling (AS) that considers the user convenience based on historical data. The usage pattern for appliances is first modeled applying the copula function or clustering method to evaluate user convenience. As the modeling results, the comfort distribution or representative scenarios are obtained, and then used to formulate a discomfort index (DI) to assess the degree of the user convenience. An AS optimization problem is formulated in terms of cost and DI. In the case study, various AS tasks are performed depending on the weights for cost and DI. The results show that user convenience has significant impacts on AS. The proposed methodology can contribute to induce more DR participation from R-users by reflecting properly user convenience to AS problem.

A study of Client Response Time Collection Method by changing the Dynamic HTML in the Web Application Server System (Dynamic HTML 변경을 통한 Web Application Server 시스템에서의 Client Response Time 수집 방식에 관한 연구)

  • Jung, Dong-Ki;Min, Sung-Gi
    • Proceedings of the Korean Information Science Society Conference
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    • 2012.06a
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    • pp.305-307
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    • 2012
  • World Wide Web (WWW)의 지속적인 성장으로 인해 Web Service의 Response Time을 수집하는 방식에 관한 연구가 진행되고 있다. 현재 Client Response Time을 수집하는 방식은 sniffer[1] 를 이용한 Agent 방식을 사용하고 있다. 하지만, 기존의 방식은 클라이언트 PC에 설치되어 수집하게 되므로 Agent의 설치가 쉽지 않고, 관리 또한 어려운 문제점을 갖고 있다. 이러한 문제점을 개선하기 위하여, 본 논문에서는 Web Application Server (WAS)[2] 에서의 Dynamic HTML 변경을 통해 Client에 추가적인 Application을 설치하지 않고도 Client의 Response Time을 Collection하는 방식에 대하여 제안하였다. 이를 통해, 사용자 (End-User)에게 추가적인 응용 프로그램을 설치하지 않고도 Dynamic HTML 을 이용하여 Client Response Time을 수집함과 동시에 Server에 Feedback할 수 있다.