Results 1 - 10 of 7,308

The design of an acquisitional query processor for sensor networks

by Samuel Madden, Michael J. Franklin, Joseph M. Hellerstein, Wei Hong - In SIGMOD , 2003
"... We discuss the design of an acquisitional query processor for data collection in sensor networks. Acquisitional issues are those that pertain to where, when, and how often data is physically acquired (sampled) and delivered to query processing operators. By focusing on the locations and costs of acq ..."
Abstract - Cited by 523 (25 self) - Add to MetaCart
, and execution. We evaluate these issues in the context of TinyDB, a distributed query processor for smart sensor devices, and show how acquisitional techniques can provide significant reductions in power consumption on our sensor devices. 1.

Tinydb: An acquisitional query processing system for sensor networks

by Samuel R. Madden, Michael J. Franklin, Joseph M. Hellerstein, Wei Hong - ACM Trans. Database Syst , 2005
"... We discuss the design of an acquisitional query processor for data collection in sensor networks. Acquisitional issues are those that pertain to where, when, and how often data is physically acquired (sampled) and delivered to query processing operators. By focusing on the locations and costs of acq ..."
Abstract - Cited by 626 (8 self) - Add to MetaCart
, and execution. We evaluate these issues in the context of TinyDB, a distributed query processor for smart sensor devices, and show how acquisitional techniques can provide significant reductions in power consumption on our sensor devices. Categories and Subject Descriptors: H.2.3 [Database Management

Data Mining: Concepts and Techniques

by Jiawei Han, Micheline Kamber , 2000
"... Our capabilities of both generating and collecting data have been increasing rapidly in the last several decades. Contributing factors include the widespread use of bar codes for most commercial products, the computerization of many business, scientific and government transactions and managements, a ..."
Abstract - Cited by 3142 (23 self) - Add to MetaCart
of data and information. This explosive growth in stored data has generated an urgent need for new techniques and automated tools that can intelligently assist us in transforming the vast amounts of data into useful information and knowledge. This book explores the concepts and techniques of data mining

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

Comparing data acquisition techniques

by Lorenzo Cioni
"... The main aim of this paper is to present a qualitative and quantitative comparison among some of the techniques used at the present to acquire samples of speech. Such techniques share the source of the data as well as their final destination but they differ as to the ways by which the stream of spee ..."
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The main aim of this paper is to present a qualitative and quantitative comparison among some of the techniques used at the present to acquire samples of speech. Such techniques share the source of the data as well as their final destination but they differ as to the ways by which the stream

Data Acquisition Techniques

by Frank Gielsdorf, Andreas Rietdorf, Lothar Gründig, Frank Gielsdorf, Andreas Rietdorf, Lothar Gruendig
"... As buildings are mostly parameterised by 3D point coordinates in CAD systems, the acquisition of geometrical data for buildings can be a very expensive task. Even for not very complex buildings this approach results in large data sets of redundant data. As a consequence, geometry is often disregarde ..."
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As buildings are mostly parameterised by 3D point coordinates in CAD systems, the acquisition of geometrical data for buildings can be a very expensive task. Even for not very complex buildings this approach results in large data sets of redundant data. As a consequence, geometry is often

Algorithms for Scalable Synchronization on Shared-Memory Multiprocessors

by John M. Mellor-crummey, Michael L. Scott - ACM Transactions on Computer Systems , 1991
"... Busy-wait techniques are heavily used for mutual exclusion and barrier synchronization in shared-memory parallel programs. Unfortunately, typical implementations of busy-waiting tend to produce large amounts of memory and interconnect contention, introducing performance bottlenecks that become marke ..."
Abstract - Cited by 573 (32 self) - Add to MetaCart
Busy-wait techniques are heavily used for mutual exclusion and barrier synchronization in shared-memory parallel programs. Unfortunately, typical implementations of busy-waiting tend to produce large amounts of memory and interconnect contention, introducing performance bottlenecks that become

Ontology Learning for the Semantic Web

by Er Maedche, Steffen Staab - IEEE Intelligent Systems , 2001
"... The Semantic Web relies heavily on the formal ontologies that structure underlying data for the purpose of comprehensive and transportable machine understanding. Therefore, the success of the Semantic Web depends strongly on the proliferation of ontologies, which requires fast and easy engineering o ..."
Abstract - Cited by 492 (16 self) - Add to MetaCart
of ontologies and avoidance of a knowledge acquisition bottleneck. Ontology Learning greatly facilitates the construction of ontologies by the ontology engineer. The vision of ontology learning that we propose here includes a number of complementary disciplines that feed on different types of unstructured, semi

Knowledge Acquisition Techniques and Tools: A Review

by R. Hepziba Gnanamalar, C. Janani, T. Devi
"... Abstract: This research analyses the modern subject of knowledge acquisition techniques and tools. The purpose of this research is to enable one to understand knowledge acquisition tools and techniques, perform analysis, and review processes in a structured way. This review investigates the efficien ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
Abstract: This research analyses the modern subject of knowledge acquisition techniques and tools. The purpose of this research is to enable one to understand knowledge acquisition tools and techniques, perform analysis, and review processes in a structured way. This review investigates

Study and Analysis of Knowledge Acquisition Techniques for Acquiring Knowledge on Product Functionality

by unknown authors
"... Abstract: This research is concerned with the Study and Analysis of Knowledge Acquisition Techniques, detailed study on Product Functionality, comparison of various Knowledge Acquisition Techniques and to select a Knowledge Acquisition Method for Acquiring Knowledge on Product Functionality efficien ..."
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Abstract: This research is concerned with the Study and Analysis of Knowledge Acquisition Techniques, detailed study on Product Functionality, comparison of various Knowledge Acquisition Techniques and to select a Knowledge Acquisition Method for Acquiring Knowledge on Product Functionality
Results 1 - 10 of 7,308