2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops)最新文献_第8页

Device discovery and connection establishment approach using Ad-Hoc Wi-Fi for opportunistic networks 机会网络中使用Ad-Hoc Wi-Fi的设备发现和连接建立方法

2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops) Pub Date : 2011-03-21 DOI: 10.1109/PERCOMW.2011.5766934

Shanshan Lu, Sankalp Shere, Yanliang Liu, Yonghe Liu

{"title":"Device discovery and connection establishment approach using Ad-Hoc Wi-Fi for opportunistic networks","authors":"Shanshan Lu, Sankalp Shere, Yanliang Liu, Yonghe Liu","doi":"10.1109/PERCOMW.2011.5766934","DOIUrl":"https://doi.org/10.1109/PERCOMW.2011.5766934","url":null,"abstract":"We propose a device discovery approach and connection establishment scheme for opportunistic networks using Ad-Hoc Wi-Fi as the underlying communication technology. We employ beacon stuffing method for a device to announce its existence in its neighborhood by broadcasting beacons stuffed with useful information in the field of SSID to remote devices. This method can allow a device to discover multiple devices and their running applications without performing connection establishment attempt while limiting the communication for device discovery only on MAC layer. In order to enhance energy efficiency, we also develop a score-based scanning schedule for device discovery operation. Once the neighbor is discovered, we present a connection establishment scheme between peers. We implement our proposed scheme on HP IPAQ 910 mobile phone equipped with Wi-Fi and Bluetooth. Extensive experiments have been carried out to evaluate our approach. The experiment results show that our approach can achieve high energy efficiency and satisfactory peer connection speed and quality.","PeriodicalId":369430,"journal":{"name":"2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125212868","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: 15

Gait characterization via pulse-Doppler radar 脉冲多普勒雷达步态表征

2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops) Pub Date : 2011-03-21 DOI: 10.1109/PERCOMW.2011.5766971

T. Yardibi, P. Cuddihy, Sahika Genc, C. Bufi, M. Skubic, M. Rantz, Liang Liu, C. E. Phillips

{"title":"Gait characterization via pulse-Doppler radar","authors":"T. Yardibi, P. Cuddihy, Sahika Genc, C. Bufi, M. Skubic, M. Rantz, Liang Liu, C. E. Phillips","doi":"10.1109/PERCOMW.2011.5766971","DOIUrl":"https://doi.org/10.1109/PERCOMW.2011.5766971","url":null,"abstract":"Falls are a major cause of injury in the elderly with almost 1/3rd of people aged 65 and more falling each year [1]. This work aims to use gait measurements from everyday living environments to estimate risk of falling and enable improved interventions. For this purpose, we consider the use of low-cost pulse-Doppler range control radar. These radars can continuously acquire data during normal activity of a person in night and day conditions and even in the presence of obstructing furniture. A short-time Fourier transform of the radar data reveals unique Doppler signatures from the torso motion and the leg swings. Two algorithms that can extract these features from the radar spectrogram are proposed in this study for estimating gait velocity and stride durations. The performance of the proposed radar system is evaluated with experimental data, which consists of 9 different walk types and a total of 27 separate tests. A high accuracy motion-capture camera system has also been used to acquire data simultaneously with the radar and provides the ground truth reference. Results indicate that the proposed radar system is a viable candidate for gait characterization and can be used to accurately track mean gait velocity, mean stride duration and stride duration variability. The gait velocity variability can also be estimated but with relatively larger error levels.","PeriodicalId":369430,"journal":{"name":"2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114661906","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: 38

Exploiting human state information to improve GPS sampling 利用人类状态信息改进GPS采样

2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops) Pub Date : 2011-03-21 DOI: 10.1109/PERCOMW.2011.5766898

Athanasios Bamis, A. Savvides

引用次数: 3

A demonstration of PyViz, a flexible smart home visualization tool 演示PyViz，一个灵活的智能家居可视化工具

2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops) Pub Date : 2011-03-21 DOI: 10.1109/PERCOMW.2011.5766889

Brian L. Thomas, Aaron S. Crandall

引用次数: 21

QoI-aware energy management for wireless sensor networks 无线传感器网络的qos感知能量管理

2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops) Pub Date : 2011-03-21 DOI: 10.1109/PERCOMW.2011.5766978

C. Liu, Pan Hui, Joel W. Branch, Bo Yang

引用次数: 18

A context-aware cost of interruption model for mobile devices 移动设备的上下文感知中断成本模型

2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops) Pub Date : 2011-03-21 DOI: 10.1109/PERCOMW.2011.5766933

Sina Zulkernain, P. Madiraju, Sheikh Iqbal Ahamed

引用次数: 6

Fidelity-based continuous query introspection and adaptation 基于保真度的连续查询自省和自适应

2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops) Pub Date : 2011-03-21 DOI: 10.1109/PERCOMW.2011.5766859

C. Julien, V. Rajamani, J. Payton, G. Roman

{"title":"Fidelity-based continuous query introspection and adaptation","authors":"C. Julien, V. Rajamani, J. Payton, G. Roman","doi":"10.1109/PERCOMW.2011.5766859","DOIUrl":"https://doi.org/10.1109/PERCOMW.2011.5766859","url":null,"abstract":"In this paper, we address the fidelity of information collected from distributed, interactive, pervasive computing environments. Queries in these dynamic networks come in two forms: snapshot queries and continuous queries. The former executes through the network and returns values that satisfy the query criteria at a particular instant in time. The latter expects a result that is updated over time to reflect changes in the system. The fidelity, or quality, of the results of these queries can be significantly impacted by the unpredictability of the dynamic network; as the query is distributed and executed, changes that occur due to network and environmental dynamics can cause the query to miss potential results or to report inconsistent information. Our previous work has shown how we can provide semantically meaningful statements about the fidelity, or quality, of the result of a snapshot query in a dynamic networked environment. In this paper, we demonstrate how this fidelity can also be used to adapt a continuous query's processing to make its execution best match the conditions in the underlying dynamic environment.","PeriodicalId":369430,"journal":{"name":"2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128984178","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: 1

Location based learning content authoring and content access in the docendo platform docendo平台中基于位置的学习内容创作和内容访问

2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops) Pub Date : 2011-03-21 DOI: 10.1109/PERCOMW.2011.5766950

Christoph Rensing, Stephan Tittel, Mojisola Erdt

{"title":"Location based learning content authoring and content access in the docendo platform","authors":"Christoph Rensing, Stephan Tittel, Mojisola Erdt","doi":"10.1109/PERCOMW.2011.5766950","DOIUrl":"https://doi.org/10.1109/PERCOMW.2011.5766950","url":null,"abstract":"Learning does not only take place in a conventional classroom setting but also during everyday activities such as field trips. Such context sensitive learning is not new and can be observed in many different areas. The increasing availability of mobile devices and network access opens up new possibilities for providing context aware support for such learning scenarios. Related work focuses mainly on supporting the learner by delivering context aware learning content and by appropriately adapting the learning media to the limited viewing capabilities of their mobile devices. The learning content provided is dependent on the context of the learner e.g. the learner's current location. In this paper, we argue the need for providing context aware support for authors of learning content. We present an extension of docendo, an open learning content authoring and management platform, to support teachers while creating location based learning material for field trips. An important new feature is the automatic mapping of the location of the author to the learning resources collected by the author.","PeriodicalId":369430,"journal":{"name":"2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117335118","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

Efficient collaboration in opportunistic networks 机会主义网络中的有效合作

2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops) Pub Date : 2011-03-21 DOI: 10.1109/PERCOMW.2011.5766918

U. Sadiq

{"title":"Efficient collaboration in opportunistic networks","authors":"U. Sadiq","doi":"10.1109/PERCOMW.2011.5766918","DOIUrl":"https://doi.org/10.1109/PERCOMW.2011.5766918","url":null,"abstract":"Content sharing, dissemination and collaboration in open environments require the ability to send and combine data packets across network even in the absence of an end-to-end connected path [1]. User mobility plays a fundamental role in selection of intermediate relays for multi-hop communication [2]. Current schemes do not take into account the effect of power law distribution of inter-contact times, flight lengths and pause duration between flights that are shown to be statistically significant in real traces [3]. We analyze how these properties can be utilized for forwarding data and composition of services available at devices in an open environment (parks, malls, streets in a city etc.) where citizens interact. Contributions of this dissertation include: i) an analytical model to infer user's location over time; ii) a distributed algorithm with low overhead and complexity to infer network topology; iii) a scheme for efficient route discovery between mobile users; and iv) a scheme for scheduling requests to compose services available across the network to provide enhanced functionality in minimal time. Initial simulations on simple forwarding in real environments show improved delivery ratios and reduced delays in comparison to existing schemes.","PeriodicalId":369430,"journal":{"name":"2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129708606","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: 1

Imirok: Real-time imitative robotic arm control for home robot applications Imirok:用于家庭机器人应用的实时仿生机械臂控制

2011 IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops) Pub Date : 2011-03-21 DOI: 10.1109/PERCOMW.2011.5766906

Heng-Tze Cheng, Zheng Sun, Pei Zhang

引用次数: 25