free -electronics-sensor network
Wireless sensor networks
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A centralrootnode (the top level of the hierarchy) is connected to one or more other nodes that are one level lower in the hierarchy (ie, the second level) with a point-to-point link between each of the second level nodes and the top level centralrootnode, while each ofUse body as the medium, inspiration and a source of energy to provide continuous sensing, monitoring and intervention Since the first edition of this book, the field of Body Sensor Networks (BSNs) has advanced rapidly. The original motivation of BSN was to harness
Multi- sensor aerosol products sampling system (MAPSS)
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Global and local properties of atmospheric aerosols have been extensively observed and measured using both spaceborne and ground-based instruments, especially during the last decade. Unique properties retrieved by the different instruments contribute to an
Sensor networks: An overview
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Sensor networks are dense wireless networks of small, low-cost sensors, which collect and disseminate environmental data. Wireless sensor networks facilitate monitoring and controlling of physical environments from remote locations with better accuracy. They have
Query Processing in Sensor Networks.
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Hardware for sensor nodes that combine physical sensors, actuators, embedded processors, and communication components has advanced significantly over the last decade, and made the large-scale deployment of such sensors a reality. Applications range The vast reduction in size and power consumption of CMOS circuitry has led to a large research effort based around the vision of wireless sensor networks. The proposed networks will be comprised of thousands of small wireless nodes that operate in a multi-hop fashionTime synchronization is a critical piece of infrastructure for any distributed system. Distributed, wireless sensor networks make extensive use of synchronized time, but often have unique requirements in the scope, lifetime, and precision of the synchronization
Wireless sensor network designs
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The emergence of compact, low-power, wireless communication sensors and actuators in the technology supporting the ongoing miniaturization of processing and storage, allows for entirely new kinds of embedded system. These systems are distributed and deployed in
Model-driven data acquisition in sensor networks
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Declarative queries are proving to be an attractive paradigm for interacting with networks of wireless sensors. The metaphor that the sensornet is a database is problematic, however, because sensors do not exhaustively represent the data in the real world. In order to map
Body sensor network a wireless sensor platform for pervasive healthcare monitoring
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With recent advances in wireless sensor networks and embedded computing technologies, miniaturized pervasive health monitoring devices have become practically feasible. In addition to providing continuous monitoring and analysis of physiological parameters, the
Maintaining sensing coverage and connectivity in large sensor networks.
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(OGDC), for density control in large scale sensor networks. The OGDC algorithm is fully localized and can maintain coverage as well as connectivity, regardless of the relationship between the radio range and the sensing range. Ns-2 simulations show that OGDC
TEEN: ARouting Protocol for Enhanced Efficiency in Wireless Sensor Networks.
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Wireless sensor networks are expected to find wide applicability and increasing deployment in the near future. In this paper, we propose a formal classification of sensor networks, based on their mode of functioning, as proactive and reactivenetworks. Reactive networks, as
Active sensor networks
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We propose using application specific virtual machines (ASVMs) to reprogram deployed wireless sensor networks. ASVMs provide a way for a user to define an applicationspecific boundary between virtual code and the VM engine. This allows programs to be very concise
The lightning imaging sensor
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The Lightning Imaging Sensor (LIS) is a NASA Earth Observing System (EOS) instrument on the Tropical Rainfall Measuring Mission (TRMM) platform designed to acquire and investigate the distribution and variability of total lightning (ie, cloud-to-ground and
Routing protocols in wireless sensor networks A survey
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Advances in wireless sensor network (WSN) technology has provided the availability of small and low-cost sensor nodes with capability of sensing various types of physical and environmental conditions, data processing, and wireless communication. Variety of sensing
System architecture for wireless sensor networks
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Jason Lester Hill Doctor of Philosophy in Computer Science University of California at Berkeley Professor David Culler, Chair In this thesis we present and operating system and three generations of a hardware platform designed to address the needs of wireless sensor
Wireless sensor networks in precision agriculture
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We present the initial setup of the Lofar Agro project that concentrates on monitoring micro- climates in a crop field. In addition to the agronomic experiment, Lofar Agro aims at gathering statistics on the wireless sensor network itself. These statistics will form the basis
Modelling data-centric routing in wireless sensor networks
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Sensor networks differ from traditional networks in several ways: sensor networks have severe energy constraints, redundant low-rate data, and many-to-one flows. The end-to-end routing schemes that have been proposed in the literature for mobile ad-hoc networks are
Constraints and approaches for distributed sensor network security (final)
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Confidentiality, integrity, and authentication services are critical to preventing an adversary from compromising the security of a distributed sensor network. Key management is likewise critical to establishing the keys necessary to provide this protection. However, providing key
A survey of sensor network applications
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In the past few years, many wireless sensor networks had been deployed, these applications serve to explore the requirements, constraints and guidelines for general sensor network architecture design. In this paper, we present a snapshot of the recent CSE PROJECTS