Results 1 - 10 of 11,142

Studying information technology in organizations: Research approaches and assumptions

by Wanda J. Orlikowski, Jack J. Baroudi - Information Systems Research , 1991
"... We examined 155 information systems research articles published from 1983 to 1988 and found that although this research is not rooted in a single overarching theoretical perspective, it does exhibit a single set of philosophical assumptions regarding the nature of the phenomena studied by informatio ..."
Abstract - Cited by 463 (2 self) - Add to MetaCart
We examined 155 information systems research articles published from 1983 to 1988 and found that although this research is not rooted in a single overarching theoretical perspective, it does exhibit a single set of philosophical assumptions regarding the nature of the phenomena studied

Land-Use Controls, Natural Restrictions, and Urban Residential Land Prices

by Ra Guidry, James D. Shilling, C. F. Sirmans
"... Abstract: Research has focused on how variations in land-use controls explain interurban variations in prices. With the notable exception of the work by Rose (1989a, 1989b), virtually no attention has been focused on how natural restrictions (bodies of water, mountains, etc.) impact land prices. The ..."
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Abstract: Research has focused on how variations in land-use controls explain interurban variations in prices. With the notable exception of the work by Rose (1989a, 1989b), virtually no attention has been focused on how natural restrictions (bodies of water, mountains, etc.) impact land prices

Application-Level Multicast Using Content-Addressable Networks

by Sylvia Ratnasamy, Mark Handley, Richard Karp, Scott Shenker , 2001
"... Most currently proposed solutions to application-level multicast organize the group members into an application-level mesh over which a DistanceVector routing protocol, or a similar algorithm, is used to construct source-rooted distribution trees. The use of a global routing protocol limits the s ..."
Abstract - Cited by 372 (8 self) - Add to MetaCart
the scalability of these systems. Other proposed solutions that scale to larger numbers of receivers do so by restricting the multicast service model to be single-sourced. In this paper, we propose an application-level multicast scheme capable of scaling to large group sizes without restricting the service

On consistency, natural restrictions and estimability under classical and extended growth curve models

by Yongge Tian , Yoshio Takane
"... Abstract. For the general growth curve model {Y, X 1 ΘX 2 , σ 2 (Σ Σ Σ 2 ⊗Σ Σ Σ 1 )} with X 1 , X 2 , Σ Σ Σ 1 and Σ Σ Σ 2 of arbitrary ranks, we study the following three problems: (I) Necessary and sufficient conditions for the model to be consistent. (II) Natural restrictions to the parameter mat ..."
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Abstract. For the general growth curve model {Y, X 1 ΘX 2 , σ 2 (Σ Σ Σ 2 ⊗Σ Σ Σ 1 )} with X 1 , X 2 , Σ Σ Σ 1 and Σ Σ Σ 2 of arbitrary ranks, we study the following three problems: (I) Necessary and sufficient conditions for the model to be consistent. (II) Natural restrictions to the parameter

Parts Of Recognition

by D.D. Hoffman, Whitman Richards - COGNITION , 1983
"... A complete theory of object recognition is an impossibility not simply because of the multiplicity of visual cues we exploit in elegant coordination to identify an object, but primarily because recognition involves fixation of belief, and anything one knows may be relevant. We finesse this obstacle ..."
Abstract - Cited by 319 (8 self) - Add to MetaCart
with two moves. The first restricts attention to one visual cue, the shapes of objects; the second restricts attention to one problem, the initial guess at the identity of an object. We propose that the visual system decomposes a shape into parts, that it does so using a rule defining part boundaries

A Multiscale Finite Element Method For Elliptic Problems In Composite Materials And Porous Media

by Thomas Y. Hou, Xiao-hui Wu - JOURNAL OF COMPUTATIONAL PHYSICS , 1997
"... In this paper, we study a multiscale finite element method for solving a class of elliptic problems arising from composite materials and flows in porous media, which contain many spatial scales. The method is designed to efficiently capture the large scale behavior of the solution without resolving ..."
Abstract - Cited by 312 (27 self) - Add to MetaCart
resolving all the small scale features. This is accomplished by constructing the multiscale finite element base functions that are adaptive to the local property of the differential operator. Our method is applicable to general multiple-scale problems without restrictive assumptions. The construction

Characterization of microbial diversity by determining terminal restriction length polymorphisms of genes encoding 16S rDNA.

by Wen-Tso Liu , Terence L Marsh , Hans Cheng , Larry J Forney - Appl. Environ. Microbiol. , 1997
"... A quantitative molecular technique was developed for rapid analysis of microbial community diversity in various environments. The technique employed PCR in which one of the two primers used was fluorescently labeled at the 5 end and was used to amplify a selected region of bacterial genes encoding ..."
Abstract - Cited by 263 (7 self) - Add to MetaCart
16S rRNA from total community DNA. The PCR product was digested with restriction enzymes, and the fluorescently labeled terminal restriction fragment was precisely measured by using an automated DNA sequencer. Computersimulated analysis of terminal restriction fragment length polymorphisms (T

Stable models and an alternative logic programming paradigm

by Victor W. Marek - In The Logic Programming Paradigm: a 25-Year Perspective , 1999
"... In this paper we reexamine the place and role of stable model semantics in logic programming and contrast it with a least Herbrand model approach to Horn programs. We demonstrate that inherent features of stable model semantics naturally lead to a logic programming system that offers an interesting ..."
Abstract - Cited by 310 (19 self) - Add to MetaCart
In this paper we reexamine the place and role of stable model semantics in logic programming and contrast it with a least Herbrand model approach to Horn programs. We demonstrate that inherent features of stable model semantics naturally lead to a logic programming system that offers an interesting

A steepest descent method for oscillatory Riemann–Hilbert problems: asymptotics for the MKdV equation

by P. Deift, X. Zhou - Ann. of Math , 1993
"... In this announcement we present a general and new approach to analyzing the asymptotics of oscillatory Riemann-Hilbert problems. Such problems arise, in particular, in evaluating the long-time behavior of nonlinear wave equations solvable by the inverse scattering method. We will restrict ourselves ..."
Abstract - Cited by 303 (27 self) - Add to MetaCart
In this announcement we present a general and new approach to analyzing the asymptotics of oscillatory Riemann-Hilbert problems. Such problems arise, in particular, in evaluating the long-time behavior of nonlinear wave equations solvable by the inverse scattering method. We will restrict ourselves

Semantics and Complexity of SPARQL

by Jorge Perez, Marcelo Arenas, Claudio Gutierrez
"... SPARQL is the standard language for querying RDF data. In this article, we address systematically the formal study of the database aspects of SPARQL, concentrating in its graph pattern matching facility. We provide a compositional semantics for the core part of SPARQL, and study the complexity of th ..."
Abstract - Cited by 277 (25 self) - Add to MetaCart
of the evaluation of several fragments of the language. Among other complexity results, we show that the evaluation of general SPARQL patterns is PSPACE-complete. We identify a large class of SPARQL patterns, defined by imposing a simple and natural syntactic restriction, where the query evaluation problem can
Results 1 - 10 of 11,142