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Integral projection models for species with complex demography.

by Stephen P Ellner , Mark Rees - American Naturalist , 2006
"... abstract: Matrix projection models occupy a central role in population and conservation biology. Matrix models divide a population into discrete classes, even if the structuring trait exhibits continuous variation (e.g., body size). The integral projection model (IPM) avoids discrete classes and po ..."
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(IPM) predicts a population growth rate l with associated eigenvectors and statedependent sensitivity and elasticity functions Several empirical studies have illustrated how a kernel can be estimated from the same data as a matrix model The currently available general theory for IPMs When several

Incremental Web Crawling as a Competitive Game of Learning Automata

by Svein Arild Myrer, Morten Goodwin Olsen , 2005
"... There is no doubt that the World Wide Web has lived up to it’s hype of being the world’s central information highway through the past years. An increasing amount of versatile services keeps finding their way onto the Web as information providers continue to embrace the possibilities that the Web can ..."
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knapsack problem we propose two solutions based on a machine learning technique known as learning automata. We show empirically that our proposed solutions continuously improve their performance through a learning process and that they are capable of operating in non-stationary environments. We also show

The Desired Sensation Level Multistage Input/Output Algorithm The Desired Sensation Level Multistage Input/Output Algorithm Work that Leads to the 2005 Algorithm

by Univ Of , Ontario On
"... The Desired Sensation Level (DSL) Method was revised to support hearing instrument fitting for infants, young children, and adults who use modern hearing instrument technologies, including multichannel compression, expansion, and multimemory capability. The aims of this revision are to maintain asp ..."
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participant, as determined by the four-frequency pure-tone average (i.e., thresholds at 500, 1000, 2000, 4000 Hz). The contralateral ear was plugged by leaving its hearing instrument in place, but turned off. This monaural measurement of the PLL was chosen to facilitate comparison with previously published

Efficient Management of Data Center Resources for Massively Multiplayer

by Online Games, Vlad Nae, Ru Iosup, Stefan Podlipnig, Radu Prodan, Dick Epema, Thomas Fahringer, Multiplayer Online Games
"... (MMOGs) can include millions of concurrent players spread across the world. To keep these highly-interactive virtual environments online, a MMOG operator may need to provision tens of thousands of computing resources from various data centers. Faced with large resource demand variability, and with m ..."
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of both the player population and the player interactions. We evaluate several algorithms, including a novel neural network predictor, for predicting the resource demand. Using trace-based simulation, we evaluate the impact of the data center policies on the resource provisioning efficiency; we show

Empirical Articles Validation of a Parent Outcome Questionnaire From Pediatric Cochlear Implantation

by Terezinha Nunes , Ursula Pretzlik , Selin Ilicak
"... This paper analyzes the reliability and validity of a questionnaire designed by The aim of this investigation was to carry out an independent assessment of a parent outcome questionnaire from pediatric cochlear implantation designed by Correspondence should be sent to Terezinha Nunes, Department ..."
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questionnaire that summarizes parents' views would be a good way of obtaining an overview of the process and outcomes. Thus this method is desirable in its own right. Second, parents whose children received implants can offer comments of great value to implant teams and policy makers. They not only provide

Different pedagogy, different politics: High school learning opportunities and youth political engagement.

by Joseph Kahne , David Crow , Nam-Jin Lee - Political Psychology, , 2013
"... Using data from an original two-wave panel survey of California high school students and a two-wave panel survey of high school students in Chicago, we find that different pedagogical approaches influence different forms of civic and political engagement. Specifically, controlling for prior levels ..."
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, skills, and habits Two Strategies for Promoting Civic and Political Engagement We focus on two prominent civic learning strategies that scholars, policy makers, and practitioners have identified as promising (see Open Discussion of Societal Issues Portraits of effective strategies for promoting civic

doi:10.1155/2012/826702 Research Article Exploiting the Burstiness of Intermediate-Quality Wireless Links

by Muhammad Hamad Alizai, Olaf L, Klaus Wehrle
"... Copyright © 2012 Muhammad Hamad Alizai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. We address the challenge of link estima ..."
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estimation and routing over highly dynamic links, thats is, bursty links that rapidly shift between reliable and unreliable periods of transmissions. Based on significant empirical evidence of over 100,000 transmissions over each link in 802.15.4 and 802.11 testbeds, we propose two metrics, expected future

A Framework for Evaluating Approximation Methods for Gaussian Process Regression

by Krzysztof Chalupka Computation, Neural Systems, Christopher K. I. Williams, Iain Murray, Neil Lawrence
"... Gaussian process (GP) predictors are an important component of many Bayesian approaches to machine learning. However, even a straightforward implementation of Gaussian process regression (GPR) requires O(n 2) space and O(n 3) time for a data set of n examples. Several approximation methods have been ..."
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.g., Subset of Data and FITC). We empirically investigate four different approximation algorithms on four different prediction problems, and make our code available to encourage future comparisons.

Learning and memory impairments in a neuroendocrine mouse model of anxiety/depression

by Flavie Darcet , Indira Mendez-David , Laurent Tritschler , Alain M Gardier , Jean-Philippe Guilloux , Denis J David , EA3544 Denis J David
"... Cognitive disturbances are often reported as serious incapacitating symptoms by patients suffering from major depressive disorders (MDDs). Such deficits have been observed in various animal models based on environmental stress. Here, we performed a complete characterization of cognitive functions i ..."
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-spatial (Morris water maze, MWM; Barnes maze, BM) learning/memory. Altered emotional phenotype after chronic corticosterone treatment was confirmed in mice using tests predictive of anxiety or depression-related behaviors. In the NORT, CORT-treated mice showed a decrease in time exploring the novel object during

4 Studying Context: A Comparison of Activity Theory, Situated Action Models, and Distributed Cognition

by Griffin Newman , Cole
"... It has been recognized that system design will benefit from explicit study of the context in which users work. The unaided individual divorced from a social group and from supporting artifacts is no longer the model user. But with this realization about the importance of context come many difficult ..."
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in the situated view. There is no attempt to catalog and predict invariant reactions (as in classical behaviorism) as situations are said to vary unpredictably, but the relation between actor and environment is one of reaction in this logic. 7 People ``orient to a situation'' rather than proactively
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