Efficient data acquisition in WSNs has attracted significant interest. For example, TinyDB [2] introduced query dissemination and data aggregation trees. Later, a probabilistic model of the physical world is used in [...
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ISBN:
(纸本)9781595937636
Efficient data acquisition in WSNs has attracted significant interest. For example, TinyDB [2] introduced query dissemination and data aggregation trees. Later, a probabilistic model of the physical world is used in [1]. Recently, [3] argues that probabilistic models of the physical world used in acquisition may miss outliers and introduces spatio-temporal suppression-based methods. We classify these established approaches as query-and-data centric approaches for optimizing the data acquisition process.
Soil contains vast ecosystemsthat play a key role in the Earth's water and nutrient cycles, but scientists cannot currently collect the high-resolution data required to fully understand them. In this paper, we pr...
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ISBN:
(纸本)9781605587486
Soil contains vast ecosystemsthat play a key role in the Earth's water and nutrient cycles, but scientists cannot currently collect the high-resolution data required to fully understand them. In this paper, we present Suelo, an embeddednetworked sensing system designed for soil monitoring. An important challenge for Suelo is that many soil sensors are inherently fragile and often produce invalid or uncalibrated data. therefore Suelo is an assisted sensing system: it actively requests the help of a human when necessary to validate, calibrate, repair, or replace sensors. this approach allows us to use available sensors without sacrificing data integrity, while minimizing the human resources required. We tested our system in multiple real soil monitoring deployments and demonstrate that, using human assistance, Suelo produced 91% fewer false negatives and false positives than common fault detection solutions on these datasets.
We present a modular sensor network platform capable of supporting a wide range of applications. We developed a platform to support a broad spectrum of scenarios, instantiating our system for applications on the groun...
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ISBN:
(纸本)9781450302654
We present a modular sensor network platform capable of supporting a wide range of applications. We developed a platform to support a broad spectrum of scenarios, instantiating our system for applications on the ground, in the water, and in the air. Our system has operated in the field for over 240 days with month long continuous deployments, measuring positions, temperatures, pressures, and rainfall, while computing cattle behaviors, event locations, and future river level. We use this experimental experience to discuss the lessons learned in designing and using a modular and multi-functional system.
this paper illustrates both challenges and benefits found in expanding a traditional game concept to a situated environment with a distributed set of wireless sensing modules. Our pervasive game equivalent of the Whac...
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ISBN:
(纸本)9781605587486
this paper illustrates both challenges and benefits found in expanding a traditional game concept to a situated environment with a distributed set of wireless sensing modules. Our pervasive game equivalent of the Whac-A-Mole game, Whac-A-Bee, retains the find-and-seek aspects of the original game while extending the location, the number of players, and the time-span in which it can be played. We discuss the obstacles met during this work, and specifically address challenges in making the game robust and flexible enough for large and long-term deployments in unknown territory.
We present TinyVM, a Virtual Machine (VM) for nesC and C applications on sensor motes. TinyVM executes compressed bytecode on-the-fly to conserve memory. To facilitate creation of application-specific VMs, partitionin...
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ISBN:
(纸本)9781605587486
We present TinyVM, a Virtual Machine (VM) for nesC and C applications on sensor motes. TinyVM executes compressed bytecode on-the-fly to conserve memory. To facilitate creation of application-specific VMs, partitioning of applications into bytecode, VM instruction set extensions and machine-code is supported. We provide experimental evidence for the efficiency of TinyVM on Atmega128-based motes and on the Intel iMote2. TinyVM also runs on Windows and Linux, and we are currently porting TinyVM to Telos-based motes.
Physicalnet is a fully implemented middleware for wireless networks of sensors and actuators (WNSAs). Based on a lightweight service oriented architecture (SOA), Physicalnet allows the users to create administrative d...
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ISBN:
(纸本)9781605587486
Physicalnet is a fully implemented middleware for wireless networks of sensors and actuators (WNSAs). Based on a lightweight service oriented architecture (SOA), Physicalnet allows the users to create administrative domains, in which owners of the nodes can share and protect their resources so that multiple applications can simultaneously use the same sensors and actuators with conflict resolution mechanisms. By using a general programming abstraction, named "bundle", Physicalnet allows programming across networks and administrative domains, and has a good support for node mobility. Other features of Physicalnet include using the Java language, supporting heterogeneous devices, and providing a chain of user tools.
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