Silicon carbide defects and luminescence centers in current heated 6H-SiC

At room temperature yellow photoluminescence with a broad peak of 2.13 eV is a well-known feature of boron-doped 6H-SiC. Usually yellow luminescence is regarded as recombination involving both the boron-related deep acceptor and donor level. But the nature of the deep level has not been clearly understood yet. We annealed 6H-SiC substrates by current in vacuum without boron injection at the temperature of 1350 and 1500 ºC. We received red and yellow luminescence in PL spectrum for the heated 6H-SiC. The luminescence was regarded as donor-acceptor pair recombination involving the deep aluminum acceptor related to the adjacent carbon vacancies and nitrogen donor or the formation of quantum well like regions of 3C-SiC in 6H-SiC matrix

Risk profiles and one-year outcomes of patients with newly diagnosed atrial fibrillation in India: Insights from the GARFIELD-AF Registry.

BACKGROUND: The Global Anticoagulant Registry in the FIELD-Atrial Fibrillation (GARFIELD-AF) is an ongoing prospective noninterventional registry, which is providing important information on the baseline characteristics, treatment patterns, and 1-year outcomes in patients with newly diagnosed non-valvular atrial fibrillation (NVAF). This report describes data from Indian patients recruited in this registry. METHODS AND RESULTS: A total of 52,014 patients with newly diagnosed AF were enrolled globally; of these, 1388 patients were recruited from 26 sites within India (2012-2016). In India, the mean age was 65.8 years at diagnosis of NVAF. Hypertension was the most prevalent risk factor for AF, present in 68.5% of patients from India and in 76.3% of patients globally (P < 0.001). Diabetes and coronary artery disease (CAD) were prevalent in 36.2% and 28.1% of patients as compared with global prevalence of 22.2% and 21.6%, respectively (P < 0.001 for both). Antiplatelet therapy was the most common antithrombotic treatment in India. With increasing stroke risk, however, patients were more likely to receive oral anticoagulant therapy [mainly vitamin K antagonist (VKA)], but average international normalized ratio (INR) was lower among Indian patients [median INR value 1.6 (interquartile range {IQR}: 1.3-2.3) versus 2.3 (IQR 1.8-2.8) (P < 0.001)]. Compared with other countries, patients from India had markedly higher rates of all-cause mortality [7.68 per 100 person-years (95% confidence interval 6.32-9.35) vs 4.34 (4.16-4.53), P < 0.0001], while rates of stroke/systemic embolism and major bleeding were lower after 1 year of follow-up. CONCLUSION: Compared to previously published registries from India, the GARFIELD-AF registry describes clinical profiles and outcomes in Indian patients with AF of a different etiology. The registry data show that compared to the rest of the world, Indian AF patients are younger in age and have more diabetes and CAD. Patients with a higher stroke risk are more likely to receive anticoagulation therapy with VKA but are underdosed compared with the global average in the GARFIELD-AF. CLINICAL TRIAL REGISTRATION-URL: http://www.clinicaltrials.gov. Unique identifier: NCT01090362

Molecular cluster theory of chemical bonding in actinide oxides

La structure électronique des mono-oxydes et des dioxydes d'actinides AcO et AcO2 (où Ac = Th, U, Np, Pu, Am, Cm et Bk) est étudiée à l'aide de modèles moléculaires dans le cadre du formalisme de la densité locale. Les orbitales moléculaires des systèmes AcO10-6 et AcO12-8 utilisés comme modèles pour les mono- et dioxydes, ont été calculées pour toute la série des actinides dans l'approximation Hartree-Fock- Slater non relativiste avec et sans polarisation de spin. Pour ThO, UO et NpO, nous utilisons le modèle complètement relativiste de Dirac-Slater afin d'évaluer l'importance du couplage spin-orbite et des déplacements des niveaux. Nous effectuons un calcul self-consistent dans le cas de NpO, le groupement NpO6 étant placé dans le champ moléculaire du solide. Finalement, nous appliquons au composé NpO un modèle de moment polarisé tenant compte de façon coherente de la polarisation de spin et des effets relativistes.The electronic structure of actinide monoxides AcO and dioxides AcO2, where Ac = Th, U, Np, Pu, Am, Cm and Bk has been studied by molecular cluster methods based on the first-principles one-electron local density theory. Molecular orbitals for nearest neighbour clusters ACO10-6 and ACO12-8 representative of monoxide and dioxide lattices were obtained using non-relativistic spin-restricted and spin-polarized Hartree- Fock-Slater models for the entire series. Fully relativistic Dirac-Slater calculations were performed for ThO, UO and NpO in order to explore magnitude of spin-orbit splittings and level shifts in valence structure. Self-consistent iterations were carried out for NpO, in which the NpO6 cluster was embedded in the molecular field of the solid. Finally, a moment polarized model which combines both spin-polarization and relativistic effects in a consistent fashion was applied to the NpO system

Efficacy evaluation of functional motor regulation method with mathematical analysis of EEG

Effects of functional motor regulation method have been measured using the spectral and coherent EEG. Obtained results have fully confirmed the hypothesis that the clinical effectiveness of the method is associated with the formation of new regulatory links in the CNS with inclusion of such deep structures as the limbic and diencephalic system