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Detached cataclysmic variables are crossing the orbital period gap
(2016)
A central hypothesis in the theory of cataclysmic variable (CV) evolution is the need to explain the observed lack of accreting systems in the ≃2-3 h orbital period range, known as the period gap. The standard model, ...
Paleointensity data from Early Cretaceous Ponta Grossa dikes (Brazil) using a multisample method
(TERRA SCIENTIFIC PUBL CO, 2009)
Definition of the long-term variation of the geomagnetic virtual dipole moment requires more reliable paleointensity results. Here, we applied a multisample protocol to the study of the 130.5 Ma Ponta Grossa basaltic dikes ...
Transport properties of polycrystalline boron doped diamond
(Elsevier B.V., 2014-08-30)
The influence of doping level in the electronic conductivity and resistivity properties of synthetic diamond films grown by hot filament chemical vapor deposition (HFCVD) was investigated. Eight different doping level ...
Quasi-biennial oscillation in GPS VTEC measurements
(Elsevier, 2014-07)
The quasi-biennial oscillation, QBO, a well known periodicity in the equatorial stratospheric zonal winds, is also found in ionospheric parameters and in solar and geomagnetic activity indices. Many authors speculated about ...
X-Ray Determination of the Variable Rate of Mass Accretion onto TW Hydrae
(IOP Publishing, 2012-11-05)
Diagnostics of electron temperature (Te), electron density (ne), and hydrogen column density (NH) from the Chandra High Energy Transmission Grating spectrum of He-like Ne ix in TW Hydrae (TW Hya), in conjunction with a ...
Carbothermal Reduction of Iron Ore Applying Microwave Energy
(WILEY-BLACKWELLMALDEN, 2012)
This paper presents the results of a study on carbothermal reduction of iron ore made under the microwave field in equipment specially developed for this purpose. The equipment allows the control of radiated and reflected ...
Longitudinal Shortening of the Left Ventricle by Cine-CMR for Assessment of Diastolic Function in Patients with Aortic Valve Disease
(Sociedade Brasileira de Cardiologia - SBC, 2019)
AbstractBackground: Diastolic dysfunction, commonly evaluated by echocardiography, is an important early finding in many cardiomyopathies. Cardiac magnetic resonance (CMR) often requires specialized sequences that extends ...
Testing the cooling flow model in the intermediate polar EX Hydrae
(Edp Sciences, 2015-05)
We use the best available X-ray data from the intermediate polar EX Hydrae to study the cooling-flow model often applied to interpret the X-ray spectra of these accreting magnetic white dwarf binaries. First, we resolve a ...
Análisis de periodicidades de TEC en latitudes ecuatoriales durante 2008Analysis of day-to-day variability in TEC at equatorial latitudes during 2008
(Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología, 2016-03)
En el presente trabajo se analiza la periodicidad de valores promedio del contenido electrónico total (TEC) para cinco estaciones GPS de la región ecuatorial durante 90 días del año 2008 (día 32 a día 122). El análisis ...
Extrinsic compression of popliteal artery in asymptomatic athlete and non-athlete individuals - A comparative study using duplex scan (color duplex sonography)
(Edizioni Minerva Medica, 2004-09-01)
Aim. Extrinsic compression of the popliteal artery and absence of surrounding anatomical abnormalities characterize the functional popliteal artery entrapment syndrome (PAES). The diagnosis is confirmed to individuals who ...