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Search Results: 1 - 10 of 299706 matches for " Steve J. Hodges "
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Pre- and Postnatal Management of Hydronephrosis
Steve J. Hodges
The Scientific World Journal , 2010, DOI: 10.1100/tsw.2010.240
Steve J. Hodges,David Werle,Gordon McLorie,Anthony Atala
The Scientific World Journal , 2010, DOI: 10.1100/tsw.2010.54
Halofuginone- and Chitosan-Coated Amnion Membranes Demonstrate Improved Abdominal Adhesion Prevention
Scott Washburn,Jamie L. Jennell,Steve J. Hodges
The Scientific World Journal , 2010, DOI: 10.1100/tsw.2010.234
Posterior Urethral Valves
Steve J. Hodges,Bhavin Patel,Gordon McLorie,Anthony Atala
The Scientific World Journal , 2009, DOI: 10.1100/tsw.2009.127
The Response Activation Model and Cross-Modal Facilitation and Inhibition of Return: A Trajectory Analysis
Lawrence E.M. Grierson, Timothy N. Welsh, Steve Hansen, Nicola J. Hodges, Spencer Hayes, James LyonsDigby Elliott
The Open Psychology Journal , 2008, DOI: 10.2174/1874350100801010035]
Abstract: Non-informative spatial cues presented prior to a goal-directed movement influence not only movement initiation time but also the spatial characteristics of the movement trajectories. These trajectory effects are thought to stem from an integration of competing motor responses. In the present experiments, trajectories of rapid aiming movements were examined under the constraints of a cue-target inhibition of return (IOR) paradigm. Aiming movements were made to targets that were preceded by a cue stimulus in the same or different location. Four experiments were conducted in which the modality of the cue and target stimulus was manipulated across vision and audition. Although facilitation effects were present under the cross modality protocols, IOR effects were observed only for same cue-target pairings. At short stimulus onset asynchronies, limb trajectories deviated toward the target that had just been cued, particularly when the cue occurred in left space. These trajectory effects are consistent with response activation models of selective attention and movement preparation.
On the Cremmer-Gervais quantizations of SL(n)
Timothy J. Hodges
Mathematics , 1995,
Abstract: Non-standard quantum groups $C_R [GL(n)]$ and $C_R [SL(n)]$ are constructed for a two parameter version of the Cremmer-Gervais $R$-matrix. An epimorphism is constructed from $C_R [GL(n)]$ onto the restricted dual $U_{\bar{R}}(\frak{gl}(n-1))$ associated to a related smaller $R$-matrix of the same form. A related result is proved concerning factorizable Lie bialgebras. For any such Lie bialgebra, the dual Lie bialgebra has a canonical homomorphic image which is again factorizable.
Nonstandard quantum groups associated to Belavin-Drinfeld triples
Timothy J. Hodges
Mathematics , 1996,
Abstract: A construction is given of a family of non-standard quantizations of the algebra of functions on a connected complex semi-simple algebraic group. For each ``disjoint'' triple in the sense of Belavin and Drinfeld, a 2-cocycle is constructed on certain multi-parameter quantum groups. The new non-standard quantum groups are the Hopf algebras obtained by twisting the known quantum groups by these 2-cocycles. In particular, the Cremmer-Gervais quantization of $SL(3)$ can be constructed in this way.
Generating functions for the coefficients of the Cremmer-Gervais R-matrices
Timothy J. Hodges
Mathematics , 1999,
Abstract: The coefficients of certain operators on $V\otimes V$ can be constructed using generating functions. Necessary and sufficient conditions are given for some such operators to satisfy the Yang-Baxter equation. As a corollary we obtain a simple, direct proof that the Cremmer-Gervais R-matrices satisfy the Yang-Baxter equation. This approach also clarifies Cremmer and Gervais's original proof via the dynamical Yang-Baxter equation.
Double quantum groups and Iwasawa decomposition
Timothy J. Hodges
Mathematics , 1996,
Abstract: The double quantum groups are the Hopf algebras underlying the complex quantum groups of which the simplest example is the quantum Lorentz group. They are non- standard quantizations of the double group $G \times G$. We construct a corresponding quantized universal enveloping algebra (QUE) and prove that the pairing between a quantum double group and its QUE is nondegenerate. We analyze the representation theory of these double quantum groups, give a detailed version of the Iwasawa decomposition proved by Podles and Woronowicz for the quantum Lorentz group, and show that they are noetherian algebras. Finally we outline a construction of more general non-standard quantum groups using quantum double groups and their generalizations.
The Cremmer-Gervais solution of the Yang-Baxter equation
Timothy J. Hodges
Mathematics , 1997,
Abstract: A direct proof is given of the fact that the Cremmer-Gervais R-matrices satisfy the Yang-Baxter equation.
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