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Oxygen production by solar vapor-phase pyrolysis of lunar regolith simulant
No full textThe oxide-rich lunar surface regolith can be used to extract the oxygen needed for the future of lunar exploration efforts as a consumable for life-support systems and spacecraft propulsion. Various techniques for the extraction of oxygen have been developed already, with solar vapor-phase pyrolysis shown to be a promising yet understudied approach. In contrast to other techniques, it requires only locally available resources, such as unbeneficiated regolith, sunlight, and vacuum in order to liberate oxygen and oxygen-bearing molecules. This study presents experimental work conducted in a purpose-built solar-vacuum furnace showing the evaporation of sodium and iron from a regolith simulant sample and their deposition on the crucible surface. This is matched by the thermochemical equilibrium modeling done in FactSage, which analyzes the process at varying pressures down to ultra-high vacuum. It highlights the need for precise temperature and pressure control, as well as the impact of regolith composition on oxygen dissociation for an efficient extraction of molecular oxygen
Separation of temporal gravity signals using standard statistical and neural network methods
No full textMAGIC’s ability to estimate the long-term trend in climate-related mass-transport signals
No full text
Impact of GRACE-FO LRI on the high-frequency domain of a combined static Earth gravity field solution
No full textHealthy Lifestyle and Cardiac Rehabilitation for Weight Loss
No full textPurpose of review: Considerable current interest is directed at pharmacological agents for producing significant weight loss. However, healthy lifestyle choices can also lead to clinically meaningful weight loss and improvements in cardiovascular disease (CVD) risk factors.
Recent findings: In this review, we summarize the recent research from our PROmoting Successful Weight Loss in Primary CarE in Louisiana (PROPEL) randomized controlled trial and review previous data on the potential benefits of cardiac rehabilitation and exercise training (CRET) programs to produce weight loss and improvements in CVD risk factors. Although obesity medications are becoming extremely attractive for secondary and even primary CVD prevention, high-intensity non-pharmacological therapies with healthy lifestyle choices reviewed herein can also lead to substantial health improvements in patients with obesity, including improvements in body weight and other body composition parameters as well as overall CVD risk
The influence of marathon running on resting-state EEG activity: a longitudinal observational study.
No full textPhysical activity (PA) has positive effects on various health aspects and neuronal functions, including neuronal plasticity. Exceeding a certain exercise frequency and duration has been associated with negative effects. Our study investigated the effects of excessive PA with a marathon run (MA) and regular PA (training and recovery phases) on electrocortical activity, as measured by electroencephalography (EEG). Thirty healthy marathon runners (26 male, 45 ± 9 yrs) were enrolled in the study. Four resting-state 32 channel EEG recordings were conducted: 12-8 weeks before MA (T-1), 14-4 days prior to MA (T0), 1-6 days after (T2), and 13-15 weeks after MA (T3). Power spectrum analyses were conducted using standardized Low-Resolution Electromagnetic Tomography (sLORETA) and included the following frequency bands: delta (1.5-6 Hz), theta (6.5-8.0 Hz), alpha1 (8.5-10 Hz), alpha2 (10.5-12.0 Hz), beta1 (12.5-18.0 Hz), beta2 (18.5-21.0 Hz), beta3 (21.5-30.0 Hz), and total power (1.5-30 Hz). Statistical nonparametric mapping showed reduced power both in the alpha-2 (log-F ratio = - 0.705, threshold log-F ratio = ± 0.685, p < 0.05) and in the delta frequency band (log-F ratio = -0.699, threshold log-F ratio = ± 0.685, p < 0.05) in frontal cortical areas after MA (T2 vs. T0). These effects diminished at long-term follow-up (T3). The results can be interpreted as correlates for subacute neuroplasticity induced by strenuous and prolonged PA. Although previous studies reported an increase in alpha frequency during and directly postexercise, the adverse observation a few days after exercise cessation suggests counterregulatory mechanisms, whose complex origin can be suspected in subcortical circuits, changes in neurotransmitter systems and modulation of affectivity
