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Search Results: 1 - 10 of 45596 matches for " Michael Roche "
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Food Regimes Revisited: A New Zealand Perspective
Michael Roche
Urbani Izziv , 2012,
Abstract: ‘Food Regimes’ was coined by Friedmann and McMichael in 1989 and provided a organising framework for a considerable amount of Australian and New Zealand research during a period of economic restructuring and ‘deregulation’. Subsequently Food regimes were overtaken by other perspectives in New Zealand and elsewhere including an interest in commodity productions chains, regulation, post-productivist landscapes, and post structural political economy. More recently McMichael has reintroduced Food Regimes to his analysis. The paper will compare and contrast McMichael’s earlier and more recent engagements with Food Regimes. The export meat, the dairy, and pip fruit industries of Zealand it will be used to illustrate points about the timing, boundaries and margins as well as the transformation of Food Regimes. Finally the paper will attempt to connect the more recent focus on commodity chain analysis and post productivist landscapes with McMichael’s renewed interest in food Regimes.
From classroom tutor to hypertext adviser: an evaluation
Michael Kemp,H. C. Davis,William Roche,Wendy Hall
Research in Learning Technology , 2002, DOI: 10.3402/rlt.v10i3.11409
Abstract: This paper describes a three-year experiment to investigate the possibility of making economies by replacing practical laboratory sessions with courseware while attempting to ensure that the quality of the student learning experience did not suffer. Pathology labs are a central component of the first-year medical undergraduate curriculum at Southampton. Activities in these labs had been carefully designed and they were supervised by lab demonstrators who were subject domain experts. The labs were successful in the eyes of both staff and students but were expensive to conduct, in terms of equipment and staffing. Year by year evaluation of the introduction of courseware revealed that there was no measurable difference in student performance as a result of introducing the courseware, but that students were unhappy about the loss of interaction with the demonstrators. The final outcome of this experiment was a courseware replacement for six labs which included a software online hypertext adviser. The contribution of this work is that it adds to the body of empirical evidence in support of the importance of maintaining dialogue with students when introducing courseware, and it presents an example of how this interaction might be achieved in software.
The utility of measures of electrophysiological and information processing variability in distinguishing between normal age-related cognitive decline, Subjective Memory Complaint (SMC), Mild Cognitive Impairment (MCI), and Alzheimer's disease (AD)
Hogan Michael,Roche Richard,Dockree Paul,Robertson Ian
Annals of General Psychiatry , 2006, DOI: 10.1186/1744-859x-5-s1-s214
Safe From Harm: Learned, Instructed, and Symbolic Generalization Pathways of Human Threat-Avoidance
Simon Dymond, Michael W. Schlund, Bryan Roche, Jan De Houwer, Gary P. Freegard
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0047539
Abstract: Avoidance of threatening or unpleasant events is usually an adaptive behavioural strategy. Sometimes, however, avoidance can become chronic and lead to impaired daily functioning. Excessive threat-avoidance is a central diagnostic feature of anxiety disorders, yet little is known about whether avoidance acquired in the absence of a direct history of conditioning with a fearful event differs from directly learned avoidance. In the present study, we tested whether avoidance acquired indirectly via verbal instructions and symbolic generalization result in similar levels of avoidance behaviour and threat-beliefs to avoidance acquired after direct learning. Following fear conditioning in which one conditioned stimulus was paired with shock (CS+) and another was not (CS?), participants either learned or were instructed to make a response that cancelled impending shock. Three groups were then tested with a learned CS+ and CS? (learned group), instructed CS+ (instructed group), and generalized CS+ (derived group) presentations. Results showed similar levels of avoidance behaviour and threat-belief ratings about the likelihood of shock across each of the three pathways despite the different mechanisms by which they were acquired. Findings have implications for understanding the aetiology of clinical avoidance in anxiety.
Aplicación informática para gestionar repositorios, establecer semejanzas y caracterizar ontologías
Edgar Rojas Ricardo,Dayné Gutierrez González,Flavio Enrique Roche Rodríguez,Michael Eduardo Marrero Clark
Revista Cubana de Ciencias Informáticas , 2012,
Abstract: El objetivo de la investigación es desarrollar una aplicación informática que gestione repositorios de ontologías, caracterice y establezca semejanzas entre ontologías representativas del conocimiento en la web. Para ello se realizó un análisis y selección de las tecnologías y herramientas adecuadas para la gestión de ontologías y el desarrollo de la aplicación. Se identificaron y documentaron las funcionalidades de la aplicación y se realizó el dise o implementación y pruebas de la misma. Esta aplicación permitirá gestionar repositorios de ontologías, obtener características y semejanzas entre las ontologías, para facilitar los procesos de almacenamiento, búsqueda y recuperación de ontologías, así como la reutilización del conocimiento almacenado en ellas
Natural resistance to cancers: a Darwinian hypothesis to explain Peto’s paradox
Roche Benjamin,Hochberg Michael E,Caulin Aleah F,Maley Carlo C
BMC Cancer , 2012, DOI: 10.1186/1471-2407-12-387
Abstract: Background Peto's paradox stipulates that there is no association between body mass (a surrogate of number of cells and longevity) and cancer prevalence in wildlife species. Resolving this paradox is a very promising research direction to understand mechanisms of cancer resistance. As of present, research has been focused on the consequences of these evolutionary pressures rather than of their causes. Discussion Here, we argue that evolution through natural selection may have shaped mechanisms of cancer resistance in wildlife species and that this can result in a threshold in body mass above which oncogenic and tumor suppressive mechanisms should be increasingly purified and positively selected, respectively. Summary We conclude that assessing wildlife species in their natural ecosystems, especially through theoretical modeling, is the most promising way to understand how evolutionary processes can favor one or the other pathway. This will provide important insights into mechanisms of cancer resistance.
Book Reviews
Colonel Michael D. Kohn,Edward M. Roche,Keely M. Fahoum,David G. Popp
Journal of Strategic Security , 2009,
Abstract: The Intelligence Wars: Lessons from Baghdad by Steven K.O'Hern.Spies for Hire: The Secret World of Intelligence Outsourcingby Tim Shorrock.The Shadow Factory: The Ultra-Secret NSA from 9/11 to theEavesdropping on America by James Bamford.Human Intelligence, Counterterrorism, and NationalLeadership: A Practical Guide by Gary Berntsen.Executive Measures, Terrorism, and National Security—Havethe Rules of the Game Changed? by David Bonner.The Human Factor: Inside the CIA's DysfunctionalIntelligence Culture by Ishmael Jones.The Lost Spy: An American in Stalin's Secret Service byAndrew Meier.Threats to Homeland Security: An All-Hazards Perspective.Edited by Richard J. Kilroy, Jr.
Quenching of the quantum Hall effect in graphene with scrolled edges
Alessandro Cresti,Michael M. Fogler,Francisco Guinea,A. H. Castro Neto,Stephan Roche
Physics , 2011, DOI: 10.1103/PhysRevLett.108.166602
Abstract: Edge nanoscrolls are shown to strongly influence transport properties of suspended graphene in the quantum Hall regime. The relatively long arc length of the scrolls in combination with their compact transverse size results in formation of many nonchiral transport channels in the scrolls. They short-circuit the bulk current paths and inhibit the observation of the quantized two-terminal resistance. Unlike competing theoretical proposals, this mechanism of disrupting the Hall quantization in suspended graphene is not caused by ill-chosen placement of the contacts, singular elastic strains, or a small sample size.
Quantum Friction: Cooling Quantum Systems with Unitary Time Evolution
Aurel Bulgac,Michael McNeil Forbes,Kenneth J. Roche,Gabriel Wlaz?owski
Physics , 2013,
Abstract: We introduce a type of quantum dissipation -- local quantum friction -- by adding to the Hamiltonian a local potential that breaks time-reversal invariance so as to cool the system. Unlike the Kossakowski-Lindblad master equation, local quantum friction directly effects unitary evolution of the wavefunctions rather than the density matrix: it may thus be used to cool fermionic many-body systems with thousands of wavefunctions that must remain orthogonal. In addition to providing an efficient way to simulate quantum dissipation and non-equilibrium dynamics, local quantum friction coupled with adiabatic state preparation significantly speeds up many-body simulations, making the solution of the time-dependent Schr\"odinger equation significantly simpler than the solution of its stationary counterpart.
Quantized Superfluid Vortex Rings in the Unitary Fermi Gas
Aurel Bulgac,Michael McNeil Forbes,Michelle M. Kelley,Kenneth J. Roche,Gabriel Wlaz?owski
Physics , 2013, DOI: 10.1103/PhysRevLett.112.025301
Abstract: In a recent article, Yefsah et al. [Nature 499, 426 (2013)] report the observation of an unusual excitation in an elongated harmonically trapped unitary Fermi gas. After phase imprinting a domain wall, they observe oscillations almost an order of magnitude slower than predicted by any theory of domain walls which they interpret as a "heavy soliton" of inertial mass some 200 times larger than the free fermion mass or 50 times larger than expected for a domain wall. We present compelling evidence that this "soliton" is instead a quantized vortex ring by showing that the main aspects of the experiment can be naturally explained within the framework of time-dependent superfluid DFT.
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