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检索条件"任意字段=Proceedings of the 19th ACM Conference on Embedded Networked Sensor Systems"

共 791 条记录，以下是401-410 订阅

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Poster: EMMON - A WSN system architecture and toolset for large-scale and dense real-time embedded monitoring

Poster: EMMON - A WSN system architecture and toolset for la...

引用

9th acm conference on embedded networked sensor systems, SenSys 2011

作者： Tennina, Stefano Bouroche, Mélanie Gomes, Ricardo Mirza, Farrukh Alves, Mario Carrozza, Gabriella Santos, Manuel Ciriello, Vincenzo Braga, Pedro Oliveira, Pedro Cahill, Vinny Porto Portugal Distributed Systems Group Trinity College TCD Dublin Ireland SESM Scarl Giugliano in Campania Naples Italy Critical Software Coimbra Portugal

ISBN: (纸本)9781450307185

Wireless sensor networks (WSNs) have attracted growing interest in the last decade as an infrastructure to support a diversity of ubiquitous computing and cyber-physical systems. However, most research work has focused on protocols or on specific applications. As a result, there remains a clear lack of effective and usable WSN system architectures that address both functional and non-functional requirements in an integrated fashion. this poster outlines the EMMON system architecture for large-scale, dense, real-time embedded monitoring. It provides a hierarchical communication architecture together with integrated middleware and command and control software. It has been designed to maintain as much as flexibility as possible while meeting specific applications requirements. EMMON has been validated through extensive analytical, simulation and experimental evaluations, including through a 300+ nodes test-bed the largest single-site WSN test-bed in Europe. © 2011 Authors.

关键词： Wireless sensor networks

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Demo: Achieving a 10x lifetime increase with IEEE 802.15.4e motes

Demo: Achieving a 10x lifetime increase with IEEE 802.15.4e ...

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9th acm conference on embedded networked sensor systems, SenSys 2011

作者： Bhadra, Sandeep Choi, Soon-Hyeok Sun, Yanjun Lu, Xiaolin Texas Instruments Inc. 12500 TI Blvd. Dallas TX 75243 United States

ISBN: (纸本)9781450307185

We present Texas Instruments' implementation of IEEE 802.15.4e protocols (CSL and TSCH) in a multi-hop mesh. At the MAC layer, we discuss techniques which reduce radio duty-cycle in our CSL implementation. Further, we propose RPL adaptation, to operate the network in 2 phases, one with small DIO timer and another with large DIO timer to minimize the impact of RPL broadcasts. Our demo shows 10x reduction in radio power consumption resulting from careful implementation of our MAC and Routing layer techniques using TelosB motes running Contiki OS. © 2011 Authors.

关键词： sensor networks

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Demo: Organic solar cell-equipped energy harvesting active networked tag (EnHANT) prototypes

Demo: Organic solar cell-equipped energy harvesting active n...

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9th acm conference on embedded networked sensor systems, SenSys 2011

作者： Stanje, Gerald Miller, Paul Zhu, Jianxun Smith, Alexander Winn, Olivia Margolies, Robert Gorlatova, Maria Sarik, John Szczodrak, Marcin Vigraham, Baradwaj Carloni, Luca Kinget, Peter Kymissis, Ioannis Zussman, Gil Electrical Engineering Columbia University New York NY 10027 United States Computer Science Columbia University New York NY 10027 United States

ISBN: (纸本)9781450307185

Energy Harvesting Active networked Tags (EnHANTs) will be a new class of devices in the domain between RFIDs and sensor networks. Small, flexible, and energetically self-reliant, EnHANTs will be attached to objects that are traditionally not networked, such as books, furniture, toys, produce, and clothing. More information about the EnHANTs project is available at http://***. In this demo we present a small network of EnHANT prototypes. the current EnHANT prototypes are integrated with novel custom in-house-developed energy harvesting and communications hardware, namely organic solar cells and ultra-wide-band impulse radio (UWB-IR) transceivers. the demo showcases prototypes communicating using the novel UWB-IR transceivers and adapting their communications and networking parameters to the available environmental energy harvested by the organic solar cells. © 2011 Authors.

关键词： Radio transceivers

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Demo: Achieving robust sensor networks through close coordination between narrow-band power line and low-power wireless communications

Demo: Achieving robust sensor networks through close coordin...

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9th acm conference on embedded networked sensor systems, SenSys 2011

作者： Sun, Yanjun Bhadra, Sandeep Choi, Soon-Hyeok Fu, Minghua Lu, Xiaolin Texas Instruments Inc. 12500 TI Blvd. Dallas TX 75081 United States

ISBN: (纸本)9781450307185

sensor networks are increasingly available in home and industry automation applications. the use of battery-powered wireless sensor nodes eases network deployment, but the dynamic wireless medium, along with energy and bandwidth constraints, poses a great challenge to achieve a robust sensor network only with these nodes. In this demonstration, we present a hybrid sensor node platform equipped with a narrow-band power line communication (PLC) transceiver and a low power RF transceiver, which closely coordinates the two transceivers to improve robustness of a sensor network. Our platform is composed of the TelosB running Contiki and a PLC module that supports several latest narrow-band PLC standards. In addition, we have extended the COOJA simulator of Contiki to support this hybrid sensor node platform in order to aid protocol designs in the context of large sensor networks. © 2011 Authors.

关键词： Radio transceivers

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A database in every sensor

A database in every sensor

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9th acm conference on embedded networked sensor systems, SenSys 2011

作者： Tsiftes, Nicolas Dunkels, Adam Swedish Institute of Computer Science Box 1263 SE-16429 Kista Sweden

ISBN: (纸本)9781450307185

We make the case for a sensor network model in which each mote stores sensor data locally, and provides a database query interface to the data. Unlike TinyDB and Cougar, in which a sink node provides a database-like front end for filtering the current sensor values from a data collection network, we propose that each sensor device should run its own database system. We present Antelope, a database management system for resource-constrained sensors. Antelope provides a dynamic database system that enables run-time creation and deletion of databases and indexes. Antelope uses energy-efficient indexing techniques that significantly improve the performance of queries. the energy cost of a query that selects 100 tuples is less than the cost of a single packet transmission. Moving forward, we believe that database techniques will be increasingly important in many emerging applications. © 2011 acm.

关键词： Energy efficiency

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Poster: Enhanced collaborative sensing scheme for user activity recognition

Poster: Enhanced collaborative sensing scheme for user activ...

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9th acm conference on embedded networked sensor systems, SenSys 2011

作者： Nishida, Yuki Kawahara, Yoshihiro Asami, Tohru Graduate School of Information Science and Technology University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo Japan School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30308 United States

ISBN: (纸本)9781450307185

Accelerometer data on a user's mobile phone contains abundant information that can be employed for user activity recognition. However, the existing schemes cannot provide accurate inference results under moving environments (e.g. on a train). this is because raw sensor data changes with the motion of the environment as well as the user. In this paper, we propose an enhanced collaborative recognition scheme that exploits neighborhood sensor data shared over a wireless network. Our preliminary experiment showed that the acceleration data of two different subjects on the same train was highly correlated. Further, it was possible to detect whether two subjects were on the same train with an accuracy of 69%. this result indicates that raw sensor data shared by spatially neighboring users can be used to detect transportation modes and enrich social networking applications. © 2011 Authors.

关键词： Wireless sensor networks

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Demo: Zoom - A multi-resolution tasking framework for crowdsourced geo-spatial sensing

Demo: Zoom - A multi-resolution tasking framework for crowds...

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9th acm conference on embedded networked sensor systems, SenSys 2011

作者： Dang, thanh Feng, Wu-Chi Bulusu, Nirupama Tran, Huy Sch. of Eng. and Comp. Science Washington State Uni. Vancouver Vancouver WA 98686 United States Department of Computer Science Portland State University Portland OR 97201 United States

ISBN: (纸本)9781450307185

Current sensor networks have limited use after deployment due to inability to dynamically update sensing tasks in the networks. Assigning multiple tasks to multiple sensor groups in a sensor network deployed over a large geographic region at fine granularity is problematic because the sensors are heterogeneous, potentially mobile, and owned by users instead of network operators. We demonstrate Zoom [1], a multi-resolution tasking framework for crowdsourced geo-spatial sensor networks. the key idea in Zoom is decoupling the task specification from the task implementation using a spatial 2-dimensional representation of the tasking region (e.g., maps). Zoom allows users to define sensor groups over heterogeneous, unstructured and mobile networks and assign different sensing tasks to each group. To the best of our knowledge, this is the first work to propose a map based approach for mobile sensing systems. © 2011 Authors.

关键词： sensor networks

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Demo: An unobtrusively wearable sensor suite for inferring the onset, causality, and consequences of stress in the field

Demo: An unobtrusively wearable sensor suite for inferring t...

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9th acm conference on embedded networked sensor systems, SenSys 2011

作者： Ertin, Emre Raij, Andrew Stohs, Nathan Al'Absi, Mustafa Kumar, Santosh Mitra, Somnath Ohio State University Columbus OH 43210 United States Universit of South Florida Tampa FL 33620 United States University of Minnesota Duluth MN 55812 United States University of Memphis Memphis TN 38152 United States

ISBN: (纸本)9781450307185

Effect of psychosocial stress on health has been a central focus area of public health research. this demonstration features a wireless sensor suite called AutoSense that collects and processes cardiovascular, respiratory, and thermoregularity measurements that can inform about the general stress state of test subjects in their natural environment. the AutoSense suite is complemented with a software framework called FieldStream on a smart phone that processes sensor measurements received from AutoSense to infer stress and other rich human behaviors (e.g., activity). In the demonstration we will have subjects wearing AutoSense suite and ANT enabled mobile phones providing real time data analysis to compute various stress indices and contextual information based on activity and respiration analysis. © 2011 Authors.

关键词： mHealth

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On the implications of the log-normal path loss model: An efficient method to deploy and move sensor motes

On the implications of the log-normal path loss model: An ef...

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9th acm conference on embedded networked sensor systems, SenSys 2011

作者： Chen, Yin Terzis, Andreas Computer Science Department Johns Hopkins University Baltimore MD 21218 United States

ISBN: (纸本)9781450307185

IEEE 802.15.4 links can be classified into three distinct reception regions: connected, transitional, and disconnected. the transitional region is large in size and characterized by the existence of links with intermediate reception ratios. Our work leverages previous work on understanding the properties of wireless links in the space and time domains but differs in the sense that we seek opportunities to actively adjust the physical topologies of sensor networks to improve link quality. Based on an existing theoretical model supported by extensive experiments in a variety of environments, we propose an efficient mechanism to identify locations with high reception ratios in the transitional region. the proposed mechanism can be used to effectively construct long, yet high reception ratio links that are 100% longer than the size of the connected region, thereby reducing the number of relay nodes necessary to interconnect sparse sensor networks by 34%. Furthermore, this mechanism can help better position mobile sinks and guide the communication protocols for mobile sensor networks. Overall, this paper provides fresh insights into the implications of the log-normal path loss model on deploying and moving sensor motes. © 2011 acm.

关键词： sensor nodes

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Demo: A solar-powered wireless parking guidance system for outdoor car parks

Demo: A solar-powered wireless parking guidance system for o...

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9th acm conference on embedded networked sensor systems, SenSys 2011

作者： Lee, Pius Tan, Hwee-Pink Han, Mingding A STAR Singapore Singapore

ISBN: (纸本)9781450307185

In this demonstration, we implement and deploy a solar-powered wireless sensor network in an outdoor carpark to provide parking guidance to motorists. Combining energy harvesting, multi-hop opportunistic routing and adaptive duty-cycling technologies, the system provides low-cost, real-time, sustainable and eco-friendly operation. We make use of solar energy harvesting sources to power our wireless vehicle detection sensor nodes. Upon detecting the presence of a car, this information is transmitted via a multi-hop wireless network to a base station, before being forwarded to the central server for information dissemination to motorists. We will display, in real-time, the variance in the duty cycle and energy level according to the time of day throughout the conference period. For similar demos we typically provide both a live video stream and real-time sensor data from the carpark, displayed on desktop web browsers and mobile devices, so that visitors can see parking lot occupancy data in real-time and compare it with a live video feed, but due to the time difference between Singapore and Seattle, we will be showing a video recording instead. © 2011 Authors.

关键词： sensor nodes

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