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	<pub:Article rdf:about="http://ebiquity.umbc.edu/paper/html/id/158/Collaborative-Joins-in-a-Pervasive-Computing-Environment">
		<rdfs:label><![CDATA[Collaborative Joins in a Pervasive Computing Environment]]></rdfs:label>
		<pub:title><![CDATA[Collaborative Joins in a Pervasive Computing Environment]]></pub:title>
		<pub:publishedOn rdf:datatype="&xsd;dateTime">2005-04-01T00:00:00-05:00</pub:publishedOn>
		<pub:abstract><![CDATA[We propose a collaborative query processing protocol based on the
principles of Contract Nets. Locating and obtaining context-sensitive
information in a mobile environment has always been a
challenge. Pervasive computing environments only exacerbate this
issue. In addition to operating on limited computing and battery
resources, mobile devices cannot always rely on the help of a
proxy-based wired infrastructure. Instead, a collaboration among peer
mobile devices becomes necessary. Collaborating devices will be able
to obtain data otherwise inaccessible due to the nature of the
environment. Additionally, by reusing answers generated by peers,
devices will be able to reduce their computation cost. In our model, a
mobile device identifies information it needs via the help of user's
profiles and constructs a query that requires one or more data
streams. The device queries its vicinity and locates peer data
sources. Our protocol then enables the device and the data sources to
combine jointly their data streams in order to calculate a required
answer. We show the effectiveness of our approach by performance
evaluation of entities querying for data while moving in a city-like
environment.]]></pub:abstract>
		<pub:pages><![CDATA[182-196]]></pub:pages>
		<pub:number><![CDATA[2]]></pub:number>
		<pub:volume><![CDATA[14]]></pub:volume>
		<pub:counter>4833</pub:counter>
		<pub:googleKey>tsU83ySxAxMJ</pub:googleKey>
		<pub:googleCitations>15</pub:googleCitations>
		<pub:booktitle><![CDATA[VLDB Journal]]></pub:booktitle>
		<pub:publisher><![CDATA[Springer]]></pub:publisher>
		<pub:author>
			<rdf:List>
				<rdf:first>
					<person:Person rdf:about="http://ebiquity.umbc.edu/person/html/Filip/Perich"><person:name><![CDATA[Filip Perich]]></person:name><rdfs:label><![CDATA[Filip Perich]]></rdfs:label></person:Person>
				</rdf:first>
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						<rdf:first>
							<person:Person rdf:about="http://ebiquity.umbc.edu/person/html/Anupam/Joshi"><person:name><![CDATA[Anupam Joshi]]></person:name><rdfs:label><![CDATA[Anupam Joshi]]></rdfs:label></person:Person>
						</rdf:first>
						<rdf:rest>							<rdf:List>
								<rdf:first>
									<person:Person rdf:about="http://ebiquity.umbc.edu/person/html/Yelena/Yesha"><person:name><![CDATA[Yelena Yesha]]></person:name><rdfs:label><![CDATA[Yelena Yesha]]></rdfs:label></person:Person>
								</rdf:first>
								<rdf:rest>									<rdf:List>
										<rdf:first>
											<person:Person rdf:about="http://ebiquity.umbc.edu/person/html/Tim/Finin"><person:name><![CDATA[Tim Finin]]></person:name><rdfs:label><![CDATA[Tim Finin]]></rdfs:label></person:Person>
										</rdf:first>
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<person:Person rdf:about="http://ebiquity.umbc.edu/person/html/Filip/Perich"><person:name><![CDATA[Filip Perich]]></person:name><rdfs:label><![CDATA[Filip Perich]]></rdfs:label></person:Person>
		</pub:firstAuthor>
		<pub:relatedProject><project:PastProject rdf:about="http://ebiquity.umbc.edu/project/html/id/2/MoGATU-Data-Management-in-Pervasive-Computing-Environments"><project:title><![CDATA[MoGATU: Data Management in Pervasive Computing Environments]]></project:title><rdfs:label><![CDATA[MoGATU: Data Management in Pervasive Computing Environments]]></rdfs:label></project:PastProject></pub:relatedProject>
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			<pub:softCopyFormat><![CDATA[PDF Document]]></pub:softCopyFormat>
			<pub:softCopyURI><![CDATA[http://ebiquity.umbc.edu/get/a/publication/1356.pdf]]></pub:softCopyURI>
			<pub:softCopySize>280967</pub:softCopySize>
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