[1] Extremely low frequency/very low frequency (ELF/VLF) radio waves are difficult to generate with conventional antennas. Ionospheric high frequency (HF) heating facilities generate ELF/VLF waves via modulated heating of the lower ionosphere. HF heating of the ionosphere changes the lower ionospheric conductivity, which in the presence of natural currents such as the auroral electrojet creates...

We applied frequency domain analysis to detect and quantify spontaneous fluctuations in the blood flow velocity of the middle cerebral artery (MCAFV). Instantaneous MCAFV of normal volunteers was detected using transcranial Doppler sonography. Spectral and transfer function analyses of MCAFV and arterial blood pressure (ABP) were performed by fast Fourier transform. We found the fluctuations in...

AIMS Heart failure (HF) has a poor prognosis. Several right ventricular (RV) echocardiographic parameters have been proposed as sensitive markers to detect patients at risk. Our objective was to compare the predictive value of four RV systolic echocardiographic parameters for outcomes in patients with HF. METHODS AND RESULTS One hundred and thirty-six patients with stable HF and a left ventri...

Polycyclic aromatic hydrocarbons (PAHs) are a class of compounds consisting of more than twobenzene rings fused in a linear, angular, or clustered arrangement and do not contain hetero atomsor carry subsistent. PAHs originate from various sources. They are primarily formed byincomplete combustion of carbon-containing fuels such as wood, coal, diesel, fat, or tobacco. Thepresent study reports an...

BackgroundPatients with heart failure reduced left ventricular ejection fraction (LVEF) (HFrEF) experience long-term deterioration of autonomic function and cardiac electrical stability linked to increased mortality risk. The Autonomic Neural Regulation Therapy Enhance Myocardial Function in Heart Failure (ANTHEM-HF) trial reported improved rate variability (HRV) turbulence (HRT) T-wave alterna...

OBJECTIVE We investigate the relationship between changes in heart rate variability and electroencephalographic (EEG) activity during sleep. METHOD Nine male subjects with regular non-rapid-eye movement-rapid-eye movement (NREM-REM) sleep cycles were included in the study. They underwent EEG and cardiac recordings during one experimental night. Heart rate variability was determined over 5-min...

The nuclear-electronic orbital ~NEO! method for the calculation of mixed nuclear-electronic wave functions is presented. Both electronic and nuclear molecular orbitals are expressed as linear combinations of Gaussian basis functions. In the NEO-HF ~Hartree-Fock! method, the energy corresponding to the single-configurational mixed nuclear-electronic wave function is minimized with respect to the...

Wafer diameters for microelectronics fabrication will soon transition from 300 to 450 mm at a time when excitation frequencies for capacitively coupled plasmas CCPs are increasing to 200 MHz or higher. Already for 300 mm tools, there is evidence that wave behavior i.e., propagation, constructive, and destructive interference affects the uniformity of processing. The increase in diameter to 450 ...

HF radar systems have the potential to measure wind direction, in addition surface currents and wave fields. However, studies on for direction determination are rare scientific literature. Starting with results presented Saviano et al. (2021), we here expand reliability of multiannual data retrieved over two periods, from May 2008 December 2010 January 2012, by a network three SeaSonde high-fre...