Institution
University of Windsor
Education•Windsor, Ontario, Canada•
About: University of Windsor is a education organization based out in Windsor, Ontario, Canada. It is known for research contribution in the topics: Population & Argumentation theory. The organization has 10654 authors who have published 22307 publications receiving 435906 citations. The organization is also known as: UWindsor & Assumption University of Windsor.
Papers published on a yearly basis
Papers
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TL;DR: It appears that a much smaller, high band of sEMG frequencies may be associated with force and the remainder of the spectrum has little relevance for force estimation, challenging previous assumptions that the raw s EMG signal power between about 20 and 500 Hz should used when estimating muscle force.
210 citations
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TL;DR: It is demonstrated that the emerald ash borer has spread in North America through a combination of diffusive range extension, associated with local flights, and by long-distance ‘jump’ dispersal associated with human movement of infested sapling or contaminated firewood.
Abstract: Limiting the damage by non-indigenous species requires rapid determination of current and potential distributions and vectors of dispersal, and development of appropriate management measures. The emerald ash borer ( Agrilus planipennis ), a wood-boring beetle native to South-East Asia, was first reported in the Great Lakes region during summer 2002. The beetle poses an enormous threat to native ash ( Fraxinus ) species of North America, as untreated trees in infested areas of Ontario, Michigan and Ohio suffer high mortality. We demonstrate that the borer has spread in North America through a combination of diffusive range extension, associated with local flights, and by long-distance ‘jump’ dispersal associated with human movement of infested sapling or contaminated firewood. Probability of infestation was inversely related to distance from borer epicentres but positively related to the size of human population centres. At least 9 of 39 populations that were first reported in Michigan during 2004 cannot be accounted for by local diffusion, raising the possibility that other unidentified mechanisms may be contributing to the dispersal of the beetle. In the absence of quarantine, by 2005 all of Michigan’s lower peninsula was contained within the boundaries of potential diffusive range expansion. Infested ash saplings also were introduced from Michigan to Maryland during 2003, and subsequently transplanted to five sites in Maryland and Virginia. Quarantine and eradication measures have had mixed results: in the south-central USA, the species appears on the brink of eradication, whereas its distribution has continued to spread during 2005 in the Great Lakes region despite extensive containment and quarantine measures. Quarantine success in the Great Lakes region is encumbered by multiple dispersal vectors, larger borer population sizes and by the more extensive geographical distribution that was achieved prior to implementation of control measures.
209 citations
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TL;DR: The proposed conceptual framework will help practitioners in the field to structure their reverse logistics activities and also help academics in developing better decision models.
209 citations
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TL;DR: The higher WBV amplitude (4 mm) and frequencies (35, 40, 45 Hz) resulted in the greatest increases in EMG activity, and WBV had no effect on BB EMG, but did increase TB activity.
Abstract: Whole-body vibration (WBV) training uses a vertically oscillating platform and reports suggest that this perturbation elicits reflexive muscle contractions that augment muscle activity and contribute to increased strength. No WBV study has measured both upper- and lower-body muscle activation. The purpose of this study was to determine the optimal WBV stimulus (frequency x amplitude) to increase electromyography (EMG) in upper- and lower-body muscles for three distinctive unloaded actions: isometric semi-squat, dynamic leg squats, and static and dynamic bilateral bicep curls. Surface EMG was measured for the vastus lateralis (VL), biceps femoris (BF), biceps brachii (BB), and triceps brachii (TB) in 10 recreationally active male university students (24.4+/-2.0 years; mean+/-SD) when WBV was administered at 2 and 4 mm and at 25, 30, 35, 40, and 45 Hz. EMG changes are reported as the difference between WBV and no WBV EMG root mean square expressed as a percentage of maximum voluntary exertion (%MVE). In static semi-squat, WBV increased muscle activity 2.9%-6.7% in the VL and 0.8%-1.2% in the BF. During dynamic squatting, WBV increased muscle activity in the VL by 3.7%-8.7% and in the BF by 0.4%-2.0%. In a static biceps curl, WBV had no effect on BB EMG, but did increase TB activity 0.3%-0.7%. During dynamic biceps curls, WBV increased BB EMG activity by 0.6%-0.8% and TB activity by 0.2%-1.0%. The higher WBV amplitude (4 mm) and frequencies (35, 40, 45 Hz) resulted in the greatest increases in EMG activity.
208 citations
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TL;DR: In this paper, the authors extended the linear stochastic frontier model to a semiparametric frontier model in which the functional form of the production frontier is unspecified and the distributions of the composite error terms are of known form.
Abstract: This article extends the linear stochastic frontier model proposed by Aigner, Lovell, and Schmidt to a semiparametric frontier model in which the functional form of the production frontier is unspecified and the distributions of the composite error terms are of known form. Pseudolikelihood estimators of the parameters characterizing the two error terms of the model are constructed based on kernel estimation of the conditional mean function. The Monte Carlo results show that the proposed estimators perform well in finite samples. An empirical application is presented. Extensions to a partially linear frontier function and to more flexible one-sided error distributions than the half-normal are discussed
207 citations
Authors
Showing all 10751 results
Name | H-index | Papers | Citations |
---|---|---|---|
Jie Zhang | 178 | 4857 | 221720 |
Robert E. W. Hancock | 152 | 775 | 88481 |
Michael Lynch | 112 | 422 | 63461 |
David Zhang | 111 | 1027 | 55118 |
Paul D. N. Hebert | 111 | 537 | 66288 |
Eleftherios P. Diamandis | 110 | 1064 | 52654 |
Qian Wang | 108 | 2148 | 65557 |
John W. Berry | 97 | 351 | 52470 |
Douglas W. Stephan | 89 | 663 | 34060 |
Rebecca Fisher | 86 | 255 | 50260 |
Mehdi Dehghan | 83 | 875 | 29225 |
Zhong-Qun Tian | 81 | 646 | 33168 |
Robert J. Letcher | 80 | 411 | 22778 |
Daniel J. Sexton | 76 | 369 | 25172 |
Bin Ren | 73 | 470 | 23452 |