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2009 Fifth International Conference on Autonomic and Autonomous Systems最新文献

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Web QoE Evaluation in Multi-agent Networks: Validation of ITU-T G.1030 多智能体网络中的Web QoE评估:ITU-T G.1030的验证
2009 Fifth International Conference on Autonomic and Autonomous Systems Pub Date : 2009-04-20 DOI: 10.1109/ICAS.2009.40
Eva Ibarrola, F. Liberal, Ianire Taboada, Rodrigo Ortega
{"title":"Web QoE Evaluation in Multi-agent Networks: Validation of ITU-T G.1030","authors":"Eva Ibarrola, F. Liberal, Ianire Taboada, Rodrigo Ortega","doi":"10.1109/ICAS.2009.40","DOIUrl":"https://doi.org/10.1109/ICAS.2009.40","url":null,"abstract":"User's requirements have become a key factor for any Quality of Service (QoS) management model to succeed. The advent and rise of new broadband services and network architectures (Triple-Play-Services, NGN…) depends on the ability of providers to achieve user's expectations in these scenarios. For that reason, the overall end user's perception (Quality of Experience – QoE) must be audited, on a regular basis, to address changing user's needs. This paper presents a general system developed to evaluate QoE on IP networks. The system architecture is designed to be capable of emulating multi agent networks and dynamically changing conditions. In addition, the results of a Web browsing QoE experiment, laid out within this emulation system, are described. The experiment was conducted on the basis of ITU-T Recommendation G.1030, and aimed to update the perceptual model, provided in this Recommendation, to today’s user requirements and technical improvements.","PeriodicalId":258907,"journal":{"name":"2009 Fifth International Conference on Autonomic and Autonomous Systems","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125586930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 75
Measuring Performance of Virtual Keyboards Based on Cyclic Scanning 基于循环扫描的虚拟键盘性能测量
2009 Fifth International Conference on Autonomic and Autonomous Systems Pub Date : 2009-04-20 DOI: 10.1109/ICAS.2009.35
A. Molina, Octavio Rivera, I. Gómez
{"title":"Measuring Performance of Virtual Keyboards Based on Cyclic Scanning","authors":"A. Molina, Octavio Rivera, I. Gómez","doi":"10.1109/ICAS.2009.35","DOIUrl":"https://doi.org/10.1109/ICAS.2009.35","url":null,"abstract":"This paper presents an exhaustive study into the different topologies of virtual ambiguous keyboards that operate by scanning techniques, analyzing the text entry average time (tc) and the average number of user inputs (UIc) per character. An mathematical model shows that in comparison with unambiguous one, text entry, in multi-tap mode, doesn't offers better performance, because both tc and UIc are greater in them. Another method of text entry, called Tnk (Text in n keys), offers improvement with respect to unambiguous keyboards. But solely highly ambiguous key-board (4-keys keyboards) shows a jointly reduction in tc and UIc. Results obtained with the model do to focus on highly ambiguous keyboard. This paper demonstrate, using simulation with extensive text, that character prediction with TnK mode only have better performance than unambiguous keyboard with character prediction in UIc parameter. Another techniques of text entry are also studied","PeriodicalId":258907,"journal":{"name":"2009 Fifth International Conference on Autonomic and Autonomous Systems","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116329782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
An Assessment of Self-Managed P2P Streaming 自管理P2P流媒体的评估
2009 Fifth International Conference on Autonomic and Autonomous Systems Pub Date : 2009-04-20 DOI: 10.1109/ICAS.2009.47
M. Alhaisoni, A. Liotta, M. Ghanbari
{"title":"An Assessment of Self-Managed P2P Streaming","authors":"M. Alhaisoni, A. Liotta, M. Ghanbari","doi":"10.1109/ICAS.2009.47","DOIUrl":"https://doi.org/10.1109/ICAS.2009.47","url":null,"abstract":"Peer-to-Peer (P2P) IPTV applications have increasingly been considered as a potential approach to online broadcasting. These overcome fundamental client-server issues and introduce new, self-management features that help improving performance. Recently, many applications such as PPlive, PPStream, Sopcast, and Joost have been deployed to deliver live and Video-on-Demand streaming via P2P. However, the P2P approach has also shown some points of failure and limitations. In this paper we analyze, assess and compare two popular Live and Video-on-Demand P2P streaming applications, Sopcast and Joost. Our goal is not simply to underline similarities and differences from the architectural and functional point of view, but also to highlight their performance in terms of traffic behavior and network efficiency; thus our experiments have been conducted in different scenarios including a large-scale event (Euro 2008).","PeriodicalId":258907,"journal":{"name":"2009 Fifth International Conference on Autonomic and Autonomous Systems","volume":"289 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116862571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Component-Based Self-Healing via Cellular Adaptation 基于组件的细胞自愈适应
2009 Fifth International Conference on Autonomic and Autonomous Systems Pub Date : 2009-04-20 DOI: 10.1109/ICAS.2009.61
M. Bisadi, M. Sharifi
{"title":"Component-Based Self-Healing via Cellular Adaptation","authors":"M. Bisadi, M. Sharifi","doi":"10.1109/ICAS.2009.61","DOIUrl":"https://doi.org/10.1109/ICAS.2009.61","url":null,"abstract":"Self-healing is a way for tackling the ever increasing complexities to manage and fix manually computer software. This paper proposes a cellular adaptation inspired mechanism to make a component based distributed system self heal. In this mechanism components of distributed system are seen as cellules of body. Environmental changes in our body cause cellular adaptations; similarly, changes incomponents' environment cause system reconfiguration. Healing is done by healer components. Each node has one healer component that monitors components residing in that node. The system is monitored via monitoring messages that pass through components and it is adapted by reconfiguration. Components of system are considered as black boxes to keep the code of components intact even when they are self healed. The proposed mechanism is evaluated by running a scenario that is implemented in CORBA Component Model (CCM). The CCM is a serverside component model for building and deploying CORBA applications.","PeriodicalId":258907,"journal":{"name":"2009 Fifth International Conference on Autonomic and Autonomous Systems","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132853428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Impact of Video Content on Video Quality for Video over Wireless Networks 无线网络视频内容对视频质量的影响
2009 Fifth International Conference on Autonomic and Autonomous Systems Pub Date : 2009-04-20 DOI: 10.1109/ICAS.2009.23
Asiya Khan, Lingfen Sun, E. Ifeachor
{"title":"Impact of Video Content on Video Quality for Video over Wireless Networks","authors":"Asiya Khan, Lingfen Sun, E. Ifeachor","doi":"10.1109/ICAS.2009.23","DOIUrl":"https://doi.org/10.1109/ICAS.2009.23","url":null,"abstract":"Video streaming is a promising multimedia application and is gaining popularity over wireless/mobile communications. The quality of the video depends heavily on the type of content. The aim of the paper is threefold. First, video sequences are classified into groups representing different content types using cluster analysis based on the spatial (edges) and temporal (movement) feature extraction. Second, we conducted experiments to investigate the impact of packet loss on video contents and hence find the threshold in terms of upper, medium and lower quality boundary at which users’ perception of service quality is acceptable. Finally, to identify the minimum send bitrate to meet Quality of Serive (QoS) requirements (e.g. to reach communication quality with Mean Opinion Score (MOS) greater than 3.5) for the different content types over wireless networks. We tested 12 different video clips reflecting different content types. We chose Peak-Signal-to-Noise-Ratio (PSNR) and decodable frame rate (Q) as end-to-end video quality metrics and MPEG4 as the video codec. The work should help optimizing bandwidth allocation for specific content in content delivery networks.","PeriodicalId":258907,"journal":{"name":"2009 Fifth International Conference on Autonomic and Autonomous Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134316111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 40
An Observation Framework for Multi-agent Systems 多智能体系统的观察框架
2009 Fifth International Conference on Autonomic and Autonomous Systems Pub Date : 2009-04-20 DOI: 10.1109/ICAS.2009.55
Joonas Kesäniemi, A. Katasonov, V. Terziyan
{"title":"An Observation Framework for Multi-agent Systems","authors":"Joonas Kesäniemi, A. Katasonov, V. Terziyan","doi":"10.1109/ICAS.2009.55","DOIUrl":"https://doi.org/10.1109/ICAS.2009.55","url":null,"abstract":"Existing middleware platforms for multi-agent systems (MAS) do not provide general support for observation. On the other hand, observation is considered to be an important mechanism needed for realizing effective and efficient coordination of agents. This paper describes a framework called Agent Observable Environment (AOE) for observation-based interaction in MAS. The framework provides 1) possibility to model MAS components with RDF-based observable soft-bodies, 2) support for both query and publish/subscribe style ontology-driven observation, and 3) ability to restrict the visibility of observable information using observation rules. Additionally, we report on an implementation of the framework for the JADE middleware platform, where AOE is realized as a custom kernel service.","PeriodicalId":258907,"journal":{"name":"2009 Fifth International Conference on Autonomic and Autonomous Systems","volume":"313 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116764207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
An Enhanced IMS Architecture Featuring Cross-Layer Monitoring and Adaptation Mechanisms 具有跨层监控和自适应机制的增强型IMS体系结构
2009 Fifth International Conference on Autonomic and Autonomous Systems Pub Date : 2009-04-20 DOI: 10.1109/ICAS.2009.36
Lemonia Boula, H. Koumaras, A. Kourtis
{"title":"An Enhanced IMS Architecture Featuring Cross-Layer Monitoring and Adaptation Mechanisms","authors":"Lemonia Boula, H. Koumaras, A. Kourtis","doi":"10.1109/ICAS.2009.36","DOIUrl":"https://doi.org/10.1109/ICAS.2009.36","url":null,"abstract":"IP Multimedia Subsystem (IMS) entails novel business opportunities for pioneering and emerging multimedia services, such as IPTV and VoIP video call applications. However, this strong commercial interest on this promising convergent IMS environment is balanced by the lack of efficient user/customer-centric network management mechanisms. ADAMANTIUM project proposes an IMS-compatible Multimedia Content Management System (MCMS) focused on performing dynamic cross layer in terms of perceptual quality for IPTV and VoIP services. This paper specifies and defines the various monitoring and adaptation modules that must be developed within Open Core IMS testbed architecture towards this enhanced IMS architecture.","PeriodicalId":258907,"journal":{"name":"2009 Fifth International Conference on Autonomic and Autonomous Systems","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128025975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
A 3-D Localization Algorithm for Robot Swarms under the Presence of Failures 存在故障的机器人群体三维定位算法
2009 Fifth International Conference on Autonomic and Autonomous Systems Pub Date : 2009-04-20 DOI: 10.1109/ICAS.2009.64
Martin Enrique Barrera Cerda, A. Ramirez-Serrano
{"title":"A 3-D Localization Algorithm for Robot Swarms under the Presence of Failures","authors":"Martin Enrique Barrera Cerda, A. Ramirez-Serrano","doi":"10.1109/ICAS.2009.64","DOIUrl":"https://doi.org/10.1109/ICAS.2009.64","url":null,"abstract":"In many applications, localization systems are important to enable unmanned vehicles (UV) operate autonomously. An example of such applications is the exploration of unknown terrains, such as the zone of an earthquake or a similar disaster. In any such scenarios errors in the UV's sensors or systems used for localization may be present. Due to the harsh environment, errors can not be avoided. Thus, a localization technique that can operate effectively even in the presence of errors is highly desirable. In this paper, a technique used for 3D localization is presented. The technique operates with heterogeneous swarm of autonomous robotic systems, is scalable and robust enough to attain a position estimate even in the presence of errors in the available sensor information.","PeriodicalId":258907,"journal":{"name":"2009 Fifth International Conference on Autonomic and Autonomous Systems","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126295889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Predicting Web Server Crashes: A Case Study in Comparing Prediction Algorithms 预测Web服务器崩溃:比较预测算法的案例研究
2009 Fifth International Conference on Autonomic and Autonomous Systems Pub Date : 2009-04-20 DOI: 10.1109/ICAS.2009.56
Javier Alonso, J. Torres, Ricard Gavaldà
{"title":"Predicting Web Server Crashes: A Case Study in Comparing Prediction Algorithms","authors":"Javier Alonso, J. Torres, Ricard Gavaldà","doi":"10.1109/ICAS.2009.56","DOIUrl":"https://doi.org/10.1109/ICAS.2009.56","url":null,"abstract":"Traditionally, performance has been the most important metrics when evaluating a system. However, in the last decades industry and academia have been paying increasing attention to another metric to evaluate servers: availability. A web server may serve many users when running, but if it is out of service too much time, it becomes useless and expensive. The industry has adopted several techniques to improve system availability, yet crashes still happen. In this paper, we propose a new framework to predict time-to-failure when the system is suffering transient failures that consume resources randomly. We study which machine learning algorithms build a more accurate model of the behavior of the anomaly system, and focus on Linear Regression and Decision Tree algorithms. Our preliminary results show that M5P (a Decision Tree algorithm) is the best option to model the behavior of the system under the random injection of memory leaks.","PeriodicalId":258907,"journal":{"name":"2009 Fifth International Conference on Autonomic and Autonomous Systems","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126482033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 31
Resource-Aware Contracts for Addressing Feature Interaction in Dynamic Adaptive Systems 动态自适应系统中解决特征交互的资源感知契约
2009 Fifth International Conference on Autonomic and Autonomous Systems Pub Date : 2009-04-20 DOI: 10.1109/ICAS.2009.24
Yu Liu, R. Meier
{"title":"Resource-Aware Contracts for Addressing Feature Interaction in Dynamic Adaptive Systems","authors":"Yu Liu, R. Meier","doi":"10.1109/ICAS.2009.24","DOIUrl":"https://doi.org/10.1109/ICAS.2009.24","url":null,"abstract":"Dynamic adaptive systems are becoming increasingly popular due to their ability to adapt to heterogeneous and changing environments. Such systems must avert adverse feature interaction where the adaptation of an existing feature or the introduction of a novel feature may result in unexpected and possibly adverse system behavior. This paper proposes resource-aware contracts for addressing adverse feature interaction in dynamically adaptable systems resulting from resource constraints. Resource-aware contracts explicitly capture the resource requirements of the individual components comprising a system. They are considered a fundamental means towards detecting and ultimately resolving adverse feature interaction and a key enabler of dynamic system adaptation.","PeriodicalId":258907,"journal":{"name":"2009 Fifth International Conference on Autonomic and Autonomous Systems","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131104594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
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