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Machine Learning Research: Four Current Directions

by Thomas G. Dietterich , 1997
"... Machine Learning research has been making great progress in many directions. This article summarizes four of these directions and discusses some current open problems. The four directions are (a) improving classification accuracy by learning ensembles of classifiers, (b) methods for scaling up super ..."
Abstract - Cited by 287 (0 self) - Add to MetaCart
learning theory, neural networks, statistics, and pattern recognition have discovered one another and begun to work together. Second, machine learning techniques are being applied to new kinds of problems including knowledge discovery in databases, language processing, robot control, and combinatorial

Arbitrary Pattern Formation by Asynchronous, Anonymous, Oblivious Robots

by Paola Flocchini, Giuseppe Prencipe, Nicola Santoro, Peter Widmayer , 2008
"... From an engineering point of view, the problem of coordinating a set of autonomous, mobile robots for the purpose of cooperatively performing a task has been studied extensively over the past decade. In contrast, in this paper we aim at an understanding of the fundamental algorithmic limitations on ..."
Abstract - Cited by 20 (7 self) - Add to MetaCart
on what a set of autonomous mobile robots can or cannot achieve. We therefore study a hard task for a set of weak robots. The task is for the robots in the plane to form any arbitrary pattern that is given in advance. This task is fundamental in the sense that if the robots can form any pattern, they can

Microscopic Evolution of Social Networks

by Jure Leskovec , Lars Backstrom, Ravi Kumar, Andrew Tomkins , 2008
"... We present a detailed study of network evolution by analyzing four large online social networks with full temporal information about node and edge arrivals. For the first time at such a large scale, we study individual node arrival and edge creation processes that collectively lead to macroscopic pr ..."
Abstract - Cited by 206 (10 self) - Add to MetaCart
We present a detailed study of network evolution by analyzing four large online social networks with full temporal information about node and edge arrivals. For the first time at such a large scale, we study individual node arrival and edge creation processes that collectively lead to macroscopic

A General Algorithm for Robot Formations Using Local Sensing and Minimal Communication

by Jakob Fredslund, Maja J Mataric , 2002
"... We study the problem of achieving global behavior in a group of distributed robots using only local sensing and minimal communication, in the context of formations. The goal is to have N mobile robots establish and maintain some predetermined geometric shape. We report results from extensive simulat ..."
Abstract - Cited by 130 (0 self) - Add to MetaCart
simulation experiments, and 40+ experiments with four physical robots, showing the viability of our approach. The key idea is that each robot keeps a single friend at a desired angle #, using some appropriate sensor. By panning the sensor by # degrees, the goal for all formations becomes simply to center

Coil sensitivity encoding for fast MRI. In:

by Klaas P Pruessmann , Markus Weiger , Markus B Scheidegger , Peter Boesiger - Proceedings of the ISMRM 6th Annual Meeting, , 1998
"... New theoretical and practical concepts are presented for considerably enhancing the performance of magnetic resonance imaging (MRI) by means of arrays of multiple receiver coils. Sensitivity encoding (SENSE) is based on the fact that receiver sensitivity generally has an encoding effect complementa ..."
Abstract - Cited by 193 (3 self) - Add to MetaCart
reconstruction from multiple receiver data. Using the framework of linear algebra, two different reconstruction strategies have been derived. In their general forms the resulting formulae hold for arbitrary sampling patterns in k-space. A detailed discussion is dedicated to the most practical case, namely

A Decentralized Approach to Formation Maneuvers

by Jonathan R. T. Lawton, Al W. Beard, Senior Member, Brett J. Young - IEEE Transactions on Robotics and Automation , 2003
"... Abstract—This paper presents a behavior-based approach to formation maneuvers for groups of mobile robots. Complex formation maneuvers are decomposed into a sequence of maneuvers between formation patterns. The paper presents three formation control strategies. The first strategy uses relative posit ..."
Abstract - Cited by 133 (0 self) - Add to MetaCart
Abstract—This paper presents a behavior-based approach to formation maneuvers for groups of mobile robots. Complex formation maneuvers are decomposed into a sequence of maneuvers between formation patterns. The paper presents three formation control strategies. The first strategy uses relative

Effects of Tone and Focus on the Formation and Alignment of F0 Contours

by Yi Xu , 1999
"... The present study examines how lexical tone and focus contribute to the formation and alignment of f0contours in speech. This was done through an investigation of f0contour formation in short Mandarin sentences. These sentences all consisted of five syllables with varying tones on the middle three s ..."
Abstract - Cited by 148 (50 self) - Add to MetaCart
syllables. The sentences were produced by eight Mandarin speakers with four different focus patterns: focus on the first, second, or last word, or with no narrow focus. The f0patterns of these sentences were examined through point-by-point f0tracing, graphical comparison of averaged f0contours, f0-contour

The Synthetic Modeling of Language Origins

by Luc Steels, John Benjamins , 1997
"... The paper surveys work on the computational modeling of the origins and evolution of language. The main approaches are clarified and some example experiments from the domains of the evolution of communication, phonetics, lexicon formation, and syntax are discussed. 1 Introduction The paper surveys ..."
Abstract - Cited by 167 (21 self) - Add to MetaCart
The paper surveys work on the computational modeling of the origins and evolution of language. The main approaches are clarified and some example experiments from the domains of the evolution of communication, phonetics, lexicon formation, and syntax are discussed. 1 Introduction The paper surveys

Pattern Formation by Autonomous Robots without Chirality

by Paola Flocchini, Giuseppe Prencipe, Nicola Santoro, Peter Widmayer - In Proc. SIROCCO , 2001
"... Consider a set of anonymous mobile robots, and the patterns they can collectively form in the plane. If each robot has a compass needle that indicates North but there is no agreement on East and West (i.e., no chirality), it is known that every arbitrary pattern given in input can be formed if a ..."
Abstract - Cited by 15 (5 self) - Add to MetaCart
Consider a set of anonymous mobile robots, and the patterns they can collectively form in the plane. If each robot has a compass needle that indicates North but there is no agreement on East and West (i.e., no chirality), it is known that every arbitrary pattern given in input can be formed

Corrective feedback and learner uptake: Negotiation of form in communicative classroom.

by Roy Lyster , Leila Ranta , Dawn Allen , Linda Corliss , Yakov Goldstein , Randall Halter , Thierry Karsenti , Lyne Laganière , Tamara Loring , Nina Padden , James Poirier , Nicole Sabourin - Studies in Second Language Acquisition, , 1997
"... This article presents a study of corrective feedback and learner uptake (i.e., responses to feedback) in four immersion classrooms at the primary level. Transcripts totaling 18.3 hours of classroom interaction taken from 14 subject-matter lessons and 13 French language arts lessons were analyzed us ..."
Abstract - Cited by 173 (6 self) - Add to MetaCart
This article presents a study of corrective feedback and learner uptake (i.e., responses to feedback) in four immersion classrooms at the primary level. Transcripts totaling 18.3 hours of classroom interaction taken from 14 subject-matter lessons and 13 French language arts lessons were analyzed
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