Quantum heat machines enabled by the electronic effective mass

Publication date: December 2019Source: Results in Physics, Volume 15Author(s): Cleverson FilgueirasAbstractIn this letter, we analyze a conceptual design for the operation of an Otto cycle heat machine driven by adiabatic modifications on the electronic effective mass. Such tailoring of it can be implemented, for instance, via the application of external electron fields in some materials, as in Gallium Nitride (GaN). We show that due both the energy quantization on this structure and the adiabatic transformation of the effective mass, the machine performance can be improved. The realization of classically inconceivable Otto machines, with an incompressible working substance, can be realized as well. Our finds hold in cases where the electronic effective mass, in the low temperature regime, remains constant during the isochoric strokes.
Source: Results in Physics - Category: Physics Source Type: research

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Publication date: Available online 14 September 2019Source: Molecular Genetics and MetabolismAuthor(s): Róisín M. Boggan, Albert Lim, Robert W. Taylor, Robert McFarland, Sarah J. PickettAbstractMitochondrial diseases, caused by mutations in either the nuclear or mitochondrial genomes (mtDNA), are the most common form of inherited neurometabolic disorders. They are remarkably heterogeneous, both in their clinical presentation and genetic etiology, presenting challenges for diagnosis, clinical management and elucidation of molecular mechanism. The multifaceted nature of these diseases, compounded by the unique ...
Source: Molecular Genetics and Metabolism - Category: Genetics & Stem Cells Source Type: research
Source: Journal of Allied Health - Category: Universities & Medical Training Authors: Tags: International Perspectives. Source Type: research
ConclusionsFindings from this meta-analysis indicate that walking pace is inversely associated with the risk of stroke.Graphical abstract
Source: Journal of Sport and Health Science - Category: Sports Medicine Source Type: research
CONCLUSION: Game-based chin-tuck against resistance exercise not only has a similar effect to head-lift exercise on swallowing function of patients with dysphagia, but is also a less strict and more enjoyable and interesting method. PMID: 31515567 [PubMed - as supplied by publisher]
Source: Journal of Rehabilitation Medicine - Category: Rehabilitation Tags: J Rehabil Med Source Type: research
ConclusionsThe incidence of PSE after mechanical thrombectomy was low in our cohort. All blood biomarkers displayed interesting sensitivity and specificity. However, the number of PSE cases was small and more studies are needed on risk factors for PSE after mechanical thrombectomy. The potential of blood markers of brain injury markers to contribute to assessment of PSE risk should be explored further.This article is part of the Special Issue "Seizures &Stroke".
Source: Epilepsy and Behavior - Category: Neurology Source Type: research
Source: Neurological Sciences - Category: Neurology Source Type: research
AbstractBackgroundThe Aphasia Rapid Test (ART) is a screening questionnaire used for examining language in acute stroke patients. The ART was initially developed and validated in French. The purpose of this study was to assess the inter-rater reliability of Italian ART.MethodsThe original version of the ART was translated into Italian. The inter-rater reliability was assessed by two independent neurologists who were blind to each other ’s ratings in 52 acute post-stroke patients.ResultsThe 52 patients (28 men, 24 women; mean age 73.73  ± 28.99 years) were included within 1 week of strok...
Source: Neurological Sciences - Category: Neurology Source Type: research
AbstractPosterior circulation strokes affect the vertebrobasilar arterial system, account for about 20 –25% of all ischemic strokes, and are a significant cause of patient disability and mortality. Diagnosis can be challenging; clinical presentation and common pitfalls facing posterior circulation stroke have been discussed elsewhere. In the first part of the review, we focus on the imaging, discus sing the information that can be gathered through a correct selection and interpretation of different possible studies helping to achieve an early diagnosis and to select the best medical treatment. In the second part of t...
Source: Neurological Sciences - Category: Neurology Source Type: research
Publication date: June 2019Source: Revista Portuguesa de Cardiologia (English Edition), Volume 38, Issue 6Author(s): Gonçalo J. Morgado, Inês R. Cruz, Ana Catarina Gomes, Ana Rita Almeida, Maria José Loureiro, Carlos Cotrim, Hélder PereiraAbstractA 24-year-old woman who was 11 weeks pregnant and had a mechanical mitral valve presented at the emergency department with ischemic stroke. Although treatment with aspirin and unfractionated heparin was initially successful, subsequent management was almost impossible, as she eventually suffered a right hemispheric stroke, requiring percutaneous interven...
Source: Revista Portuguesa de Cardiologia - Category: Cardiology Source Type: research
This study aims to analyze the incidence and short-term outcomes associated with stroke (ischemic and hemorrhagic) after implantation of LVAD.MethodsStudy cohorts were identified from the National Inpatient Sample database from January 2009 to September 2015 using ICD 9 codes. The primary outcome was an incidence of stroke and secondary outcomes were associated mortality, length of stay and cost of hospitalization. Multivariate logistic regression analysis was performed to analyze adjusted in-hospital mortality.ResultsUse of LVAD increased significantly from 2009 to 2014 (2,278 in 2009 to 3,730 in 2014 (Ptrend
Source: Indian Heart Journal - Category: Cardiology Source Type: research
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