Results 1 - 10 of 3,006

ANALYSIS OF WIRELESS SENSOR NETWORKS FOR HABITAT MONITORING

by Joseph Polastre, Robert Szewczyk, Alan Mainwaring, David Culler, John Anderson , 2004
"... We provide an in-depth study of applying wireless sensor networks (WSNs) to real-world habitat monitoring. A set of system design requirements were developed that cover the hardware design of the nodes, the sensor network software, protective enclosures, and system architecture to meet the require ..."
Abstract - Cited by 1490 (19 self) - Add to MetaCart
We provide an in-depth study of applying wireless sensor networks (WSNs) to real-world habitat monitoring. A set of system design requirements were developed that cover the hardware design of the nodes, the sensor network software, protective enclosures, and system architecture to meet

Model-Driven Data Acquisition in Sensor Networks

by Amol Deshpande , Carlos Guestrin, Samuel R. Madden, et al. - IN VLDB , 2004
"... 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 the raw sensor ..."
Abstract - Cited by 449 (36 self) - Add to MetaCart
readings onto physical reality, a model of that reality is required to complement the readings. In this paper, we enrich interactive sensor querying with statistical modeling techniques. We demonstrate that such models can help provide answers that are both more meaningful, and, by introducing

The synchronous approach to reactive and real-time systems

by Albert Benveniste, Gerard Berry - Proceedings of the IEEE , 1991
"... This special issue is devoted to the synchronous approach to reactive and real-time programming. This introductory paper presents and discusses the application fields and the principles of synchronous programming. The major concern of the synchronous approach is to base synchronous programming langu ..."
Abstract - Cited by 436 (15 self) - Add to MetaCart
to call real-time a program or system that receives external interrupts or reads sensors connected to the physical world and outputs commands to it. Real-time programming is an essential industrial activ-

Cartel: a distributed mobile sensor computing system

by Bret Hull, Vladimir Bychkovsky, Yang Zhang, Kevin Chen, Michel Goraczko, Allen Miu, Eugene Shih, Hari Balakrishnan, Samuel Madden - In 4th ACM SenSys , 2006
"... CarTel is a mobile sensor computing system designed to collect, process, deliver, and visualize data from sensors located on mobile units such as automobiles. A CarTel node is a mobile embedded computer coupled to a set of sensors. Each node gathers and processes sensor readings locally before deliv ..."
Abstract - Cited by 327 (30 self) - Add to MetaCart
CarTel is a mobile sensor computing system designed to collect, process, deliver, and visualize data from sensors located on mobile units such as automobiles. A CarTel node is a mobile embedded computer coupled to a set of sensors. Each node gathers and processes sensor readings locally before

Giotto: A time-triggered language for embedded programming

by Thomas A. Henzinger, Benjamin Horowitz, Christoph Meyer Kirsch - PROCEEDINGS OF THE IEEE , 2001
"... Giotto provides an abstract programmer's model for the implementation of embedded control systems with hard real-time constraints. A typical control application consists of periodic software tasks together with a mode switching logic for enabling and disabling tasks. Giotto speci es timetrigger ..."
Abstract - Cited by 286 (37 self) - Add to MetaCart
timetriggered sensor readings, task invocations, and mode switches independent of any implementation platform. Giotto can be annotated with platform constraints such as task-to-host mappings, and task and communication schedules. The annotations are directives for the Giotto compiler, but they do not alter

Lessons From A Sensor Network Expedition

by Robert Szewczyk, Joseph Polastre, Alan Mainwaring, David Culler , 2004
"... Habitat monitoring is an important driving application for wireless sensor networks (WSNs). Although researchers anticipate some challenges arising in the real-world deployments of sensor networks, a number of problems can be discovered only through experience. This paper evaluates a sensor network ..."
Abstract - Cited by 243 (11 self) - Add to MetaCart
at densities previous impossible; however, we show that the sensor data is also useful for predicting system operation and network failures. Based on over one million data and health readings, we analyze the node and network design and develop network reliability profiles and failure models.

P.: Discovering Flow Anomalies: A SWEET Approach

by James Kang, Shashi Shekhar, Christine Wennen, Paige Novak, James M. Kang, Shashi Shekhar, Christine Wennen, Paige Novak - In: University of Minnesota, MN, Technical Report , 2009
"... Given a percentage-threshold and readings from a pair of consecutive upstream and downstream sensors, flow anomaly discovery identifies dominant time intervals where the fraction of time instants of significantly mis-matched sensor readings exceed the given percentage-threshold. Discovering flow ano ..."
Abstract - Cited by 3 (2 self) - Add to MetaCart
Given a percentage-threshold and readings from a pair of consecutive upstream and downstream sensors, flow anomaly discovery identifies dominant time intervals where the fraction of time instants of significantly mis-matched sensor readings exceed the given percentage-threshold. Discovering flow

Evaluating Probabilistic Queries over Imprecise Data

by Reynold Cheng - In SIGMOD , 2003
"... Sensors are often employed to monitor continuously changing entities like locations of moving ob-jects and temperature. The sensor readings are reported to a database system, and are subsequently used to answer queries. Due to continuous changes in these values and limited resources (e.g., net-work ..."
Abstract - Cited by 278 (45 self) - Add to MetaCart
Sensors are often employed to monitor continuously changing entities like locations of moving ob-jects and temperature. The sensor readings are reported to a database system, and are subsequently used to answer queries. Due to continuous changes in these values and limited resources (e.g., net

Graduate Program in Water Resources Science,

by James M. Kang, Shashi Shekhar, Christine Wennen, Paige Novak, Department Of Civil Engineering
"... Given a percentage-threshold and readings from a pair of consecutive upstream and downstream sensors, flow anomaly discovery identifies dominant time intervals where the fraction of time instants of significantly mis-matched sensor readings exceed the given percentage-threshold. Discovering flow ano ..."
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Given a percentage-threshold and readings from a pair of consecutive upstream and downstream sensors, flow anomaly discovery identifies dominant time intervals where the fraction of time instants of significantly mis-matched sensor readings exceed the given percentage-threshold. Discovering flow

TENSE (MIS)MATCHES BETWEEN VERBS AND OBLIQUES IN MALAGASY *

by Matt Pearson
"... In Malagasy, spatial deictic adverbials, certain prepositions, and other oblique elements may carry the prefix t-. This prefix is generally treated as a past tense marker, since oblique predicates take t- when denoting past states, while oblique dependents of verbs generally require t- when the verb ..."
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the oblique denotes an instrument, location, source, etc., rather than a goal, tense mismatching triggers a past habitual reading of the clause. Although this paper is largely descriptive, I propose a tentative syntactic analysis of the recent past reading, and some speculative generalizations concerning
Results 1 - 10 of 3,006