2,407 research outputs found
Spin fluctuations influence on quasiparticle spectrum of realistic p-d model
In the present work the multiband p-d model for -layer is treated. It
was shown that for the realistic set of parameters besides Zhang-Rice
two-particle singlet there is non-negligible contribution of two-particle
triplet state to the top of the valence band. Also shown, that to gain
quantitative agreement with experimental data the minimal approximation should
include the spin fluctuations beyond the Hubbard-I scheme. Quasiparticle
spectrum, obtained in this approximation, is in fairly good agreement with
ARPES data on Bi2212 High- compound.Comment: Submitted to ICM 2003 Conference 3 pages, 2 figure
A Theoretical and Experimental Analysis of Radiofrequency Ablation with a Multielectrode, Phased, Duty-Cycled System
Background: The development of a unique radiofrequency (RF) cardiac ablation system, for the treatment of cardiac arrhythmias, is driven by the clinical need to safely create large uniform lesions while controlling lesion depth. Computational analysis of a finite element model of a three-dimensional, multielectrode, cardiac ablation catheter, powered by a temperature-controlled, multiphase, duty-cycled RF generator, is presented. Methods: The computational model for each of the five operating modes offered by the generator is compared to independent tissue temperature measurements taken during in vitro ablation experiments performed on bovine myocardium. Results: The results of the model agree with experimental temperature measurements very closely—the average values for mean error, root mean square difference, and correlation coefficient were 1.9°C, 13.3%, and 0.97, respectively. Lesions are shown to be contiguous and no significant edge effects are observed. Conclusions: Both the in vitro and computational model results demonstrate that lesion depth decreases consistently as the bipolar-to-unipolar ratio increases—suggesting a clinical application to potentially control lesion depth with higher fidelity than is currently available. The effect of variable design parameters and clinical conditions on RF ablation can now be expeditiously studied with this validated model. (PACE 2010; 33:1089–1100)Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/79205/1/j.1540-8159.2010.02801.x.pd
Life threatening nontraumatic tension gastrothorax
Tension gastrothorax is a rare condition, which poses a diagnostic dilemma and can be mistaken for a tension pneumothorax. Awareness of the risk factors, clinical presentation, and radiology findings of tension gastrothorax can help with the prompt identification and successful management of this life-threatening condition
Grief and Avoidant Death Attitudes Combine to Predict the Fading Affect Bias
The fading affect bias (FAB) occurs when unpleasant affect fades faster than pleasant affect. To detect mechanisms that influence the FAB in the context of death, we measured neuroticism, depression, anxiety, negative religious coping, death attitudes, and complicated grief as potential predictors of FAB for unpleasant/death and pleasant events at 2 points in time. The FAB was robust across older and newer events, which supported the mobilization-minimization hypothesis. Unexpectedly, complicated grief positively predicted FAB, and death avoidant attitudes moderated this relation, such that the Initial Event Affect by Grief interaction was only significant at the highest 3 quintiles of death avoidant attitudes. These results were likely due to moderate grief ratings, which were, along with avoidant death attitudes, related to healthy outcomes in past research. These results implicate complicated grief and death avoidant attitudes as resiliency mechanisms that are mobilized during bereavement to minimize its unpleasant effects
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Young adults and the 5 a day campaign: perceived benefits and barriers of eating more fruits and vegetables
Although consuming adequate amounts of fruits and vegetables reduces the risk of developing
chronic diseases, it is widely recognized that young adults’ intakes are currently well
below the Department of Health’s recommended five portions a day, with men consuming
even less than women. One approach in the UK has been to introduce health campaigns
such as the 5 A DAY programme; however, little is currently known about how well their
messages are understood amongst young adults. This study examined current knowledge of
the 5 A DAY message in young adults, as well as the perceived benefits and remaining
barriers towards consuming more fruits and vegetables. In total, four focus groups were
conducted using male (n = 22) and female (n = 18) students at the University of Reading.
Content analysis revealed that while participants were aware of the 5 A DAY recommendation,
there was widespread confusion regarding the detail. In addition, men were less
accepting of the message than women, reporting greater disbelief and a lack of motivation
to increase intake. Finally, a range of barriers was reported by participants of both genders,
despite the perceived beneficial effects for health and appearance. The results illustrate a
considerable gap between awareness and knowledge of the 5 A DAY message, and underscore
the challenge that changing behaviour in young adults represents. As well as stepping
up education- and skill-based health campaigns, more targeted gender specific interventions
will be needed to achieve sustained increases in fruit and vegetable intake
Reporters for the analysis of N-glycosylation in Candida albicans
Copyright © 2013 The Authors. Published by Elsevier Inc. All rights reserved.Peer reviewedPublisher PD
Democratic localism and the implementation of the Community Remedy in England and Wales
This article assesses the development and implementation of the Community Remedy anti-social behaviour policy by Police and Crime Commissioners (PCCs) in England and Wales. The Community Remedy, introduced by the Anti-Social Behaviour, Crime and Policing Act (2014), allows victims of ‘low-level’ anti-social behaviour to select an informal action for their offender from a list designed by their local PCC via consultation with the public. This article reports the results of a benchmarking exercise that investigates how PCCs have translated this policy into practice by examining: public consultation procedures; the contents of the Community Remedy documents; and police usage. The findings indicate an uneven implementation across regions with variable levels of engagement from PCCs, police forces and members of the public. We assess the enactment and adoption of this new power alongside its potential to stimulate democratic localism
Difficulty Accessing Syringes Mediates the Relationship Between Methamphetamine Use and Syringe Sharing Among Young Injection Drug Users
Injection drug users (IDU) who use methamphetamine (MA) are at an increased risk of HIV infection due to engagement in injection-related risk behavior including syringe sharing. In this cohort study of young IDU aged 18-30, we investigated the relationship between injection MA use and syringe sharing, and whether difficulty accessing sterile syringes mediated this association. Behavioral questionnaires were completed by 384 IDU in Vancouver, Canada between October 2005 and May 2008. Generalized estimating equations were used to estimate direct and indirect effects. The median age of participants was 24 (IQR: 22–27) and 214 (55.7%) were male. Injecting MA was independently associated with syringe sharing. Mediation analyses revealed that difficulty accessing sterile syringes partially mediated the association between injecting MA and syringe sharing. Interventions to reduce syringe sharing among young methamphetamine injectors must address social and structural barriers to accessing HIV prevention programs
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