Micromilling of Uniform Nanoparticles for Space Applications

Fritsch micromills have enhanced one NASA labs ability to develop optimized ceramic nanoparticulate materials for demanding research projects, including energy storage and thermoelectric device applications

Solid State Ultracapacitor

An ink of the formula: 60-80% by weight BaTiO3 particles coated with SiO2; 5-50% by weight high dielectric constant glass; 0.1-5% by weight surfactant; 5-25% by weight solvent; and 5-25% weight organic vehicle. Also a method of manufacturing a capacitor comprising the steps of: heating particles of BaTiO3 for a special heating cycle, under a mixture of 70-96% by volume N2 and 4-30% by volume H2 gas; depositing a film of SiO2 over the particles; mechanically separating the particles; incorporating them into the above described ink formulation; depositing the ink on a substrate; and heating at 850-900 C for less than 5 minutes and allowing the ink and substrate to cool to ambient in N2 atmosphere. Also a dielectric made by: heating particles of BaTiO3 for a special heating cycle, under a mixture of 70-96% by volume N2 and 4-30% by volume H2 gas; depositing a film of SiO2 over the particles; mechanically separating the particles; forming them into a layer; and heating at 850-900 C for less than 5 minutes and allowing the layer to cool to ambient in N2 atmosphere

High Performance Composite Dielectric Ink for Ultracapacitors

The present invention is a dielectric ink and means for printing using said ink. Approximately 10-20% of the ink is a custom organic vehicle made of a polar solvent and a binder. Approximately 30-70% of the ink is a dielectric powder having an average particle diameter of approximately 10-750 nm. Approximately 5-15% of the ink is a dielectric constant glass. Approximately 10-35% of the ink is an additional amount of solvent. The ink is deposited on a printing substrate to form at least one printed product, which is then dried and cured to remove the solvent and binder, respectively. The printed product then undergoes sintering in an inert gas atmosphere

Effect of Resistance Training on VCAM-1 and Cortisol in HIV+ Men with Chemical Dependence

Effect of resistance training on VCAM-1 and Cortisol in HIV+ men with chemical dependence Curtis, John H., Vingren, Jakob L., Hill, David W., The Applied Physiology Laboratory, The University of North Texas, Denton, TX Resistance training can reduce the effects of inflammatory diseases and contribute to skeletal muscle repair and regeneration. Cortisol functions to reduce inflammation in the body however, it can impair the immune system. Elevated levels of Vascular Cell Adhesion Molecule 1 (VCAM-1) are associated with an increased risk of cardiovascular disease. Chemical dependency is also associated with immune impairment. Purpose: The purpose of this study was to look at the impact of resistance training on the level of cortisol and VCAM-1 as an inflammatory response to resistance training. Methods: Sixteen HIV+ men (Age: 41.5 ± 10.9, Height: 180.4 ± 9.1 cm, Weight: 89.2 ± 20.7 kg) enrolled in an in-patient chemical dependence rehabilitation program were recruited and assigned to one of two groups using randomization: supervised resistance training 3 times per week (Exercise) or no exercise training (Control) for six weeks. Before and after the 6-week period, a resting and fasted blood sample was obtained and analyzed for cortisol and VCAM-1 concentrations. Results: Resting levels of VCAM-1 were statistically unchanged in both the Control group (6.05 ± 4.5 vs. 6.13 ± 4.5) and in the Exercise group (7.05 ± 3.4 vs. 7.6 ± 3.6). Levels of Cortisol were also statistically unchanged in both the Control group (26.33 ± 9.3 vs. 26.08 ± 7.9) and the Exercise group (21.84 ± 3.5 vs. 22.37 ±4.8). Conclusion: A six week resistance training program might not be long enough to illicit the benefits of lower Cortisol levels and an increase in VCAM-1 levels in this given population

ISM Multi Material Fabrication Flexible Sensing Development

No abstract availabl

Overview of NASA Ultracapacitor Technology

NASA needed a lower mass, reliable, and safe medium for energy storage for ground-based and space applications. Existing industry electrochemical systems are limited in weight, charge rate, energy density, reliability, and safety. We chose a ceramic perovskite material for development, due to its high inherent dielectric properties, long history of use in the capacitor industry, and the safety of a solid state material

Materials & Process Development for Printable Electronics at MSFC

No abstract availabl

ISM In-Space Manufacturing

Develop and enable the technologies, materials, and processes required to provide affordable, sustainable on-demand manufacturing, recycling, and repair during Exploration Missions

The Effect of Work Rate on Oxygen Uptake Kinetics During Exhaustive Severe Intensity Cycling Exercise

The effect of work rate on oxygen uptake kinetics during exhaustive severe intensity cycling exercise Jennifer L. Sylvester, Samantha D. Burdette, Steven W. Cross, Nosa O. Idemudia, John, H. Curtis, Jakob L. Vingren, David W. Hill. Applied Physiology Laboratory, University of North Texas, Denton, TX During exhaustive severe intensity exercise, the oxygen uptake (VO2) increases exponentially, with a time constant of ~30 s. After ~1 to 2 min, a slow component emerges and drives the VO2 to its maximum. There are clear differences in the VO2 response profile across exercise intensity domains. These disparities might not be attributable to metabolic demand but, rather, to characteristics of the various intensity domains, such as the consequences of lactic acid production. PURPOSE: To investigate the role of exercise intensity on the VO2 response profile at intensities wholly within the severe domain. METHODS: Four women (mean ± SD: age 22 ± 2 years, height 167 ± 7 cm, mass 66 ± 5 kg) and eight men (age 23 ± 2 yr, height 179 ± 9 cm, mass 78 ± 10 kg) performed exhaustive constant-power cycle ergometer tests at two different severe intensity work rates (263 ± 78 W and 214 ± 64 W). Smoothed breath-by-breath VO2 data were fitted to a two-component (primary response and slow component) model using iterative regression. RESULTS: Times to exhaustion were 217 ± 27 s and 590 ± 82 s, respectively. The VO2max values were the same at the two different work rates (2973 ± 691 ml·min-1 and 3011 ± 728 ml·min-1). The amplitude of the primary response was greater (p \u3c 0.05) at the higher work rate (2095 ± 716 ml·min-1) than at the lower work rate (1857 ± 618 ml·min-1) and the amplitude of the slow component was smaller (367 ± 177 ml·min-1 vs 645 ± 347 ml·min-1). In addition, the time delay before the emergence of the slow component was shorter at the higher work rate (92 ± 22 s vs 116 ± 42 s). CONCLUSION: The results show that exercise intensity per se affects the VO2 response profile within the severe intensity domain and suggest that metabolic demand drives the primary response of VO2 kinetics within this domain. Category to be judged: Master\u27

Increasing Strength and Muscle Mass in HIV+ Men Recovering from Substance Abuse

The combination of substance (drug and/or alcohol) abuse and infection with human immunodeficiency virus (HIV) can result in the development of several co-morbidities, including muscle wasting. Resistance training could, therefore, be an important tool in the treatment of substance addiction/abuse and HIV. PURPOSE: The purpose of this study was to examine the effect of resistance training on measures of muscle mass and strength in the context of co-occurring substance abuse and HIV. METHODS: Seventeen untrained men (Mean ± SD: 42 ± 11 years, 89.7 ± 16.0 kg, 179.7 ± 9.1 cm, 18.9 ± 5.5 %fat) who are infected with HIV and enrolled in an in-patient substance addiction/abuse treatment program completed six weeks of either resistance training (RT) (three sessions per week) or no-exercise prescription (Control). Before (Pre) and after (Post) the 6-week period, anthropometric (e.g., body mass, skinfolds, and circumferences), strength (bench press and isometric squat), and power (vertical jumps) measurements were obtained. RESULTS: Predicted bench press 1-repetition maximum (1-RM) increased significantly (p\u3c0.05) for RT (Pre: 73.4 ± 23.4 kg; Post: 85.0 ± 30.4 kg) but not for Control (Pre: 54.9 ± 24.6 kg; Post: 57.3 ± 27.0 kg). Peak isometric squat force increased significantly for RT (Pre: 2627 ± 1071 N; Post: 2892 ± 1171 N) but not for Control (Pre: 2411 ± 675 N; Post: 2394 ± 592 N). Peak vertical jump power also increased significantly for RT (Pre: 35.9 ± 3.5 W·kg-1; Post: 36.2 ± 5.0 W·kg-1) but not for Control (Pre: 33.9 ± 3.9 W·kg-1; Post: 35.7 ± 4 W·kg-1). Muscle mass increased significantly for RT (Pre: 46.4 ± 8.2 kg; Post: to 50.5 ± 8.1 kg) but not for Control (Pre: 46.9 ± 13.0 kg; Post: 47.8 ± 12.4 kg). Upper arm and forearm circumference increased only for RT. No adverse effects of the resistance training program were observed. CONCLUSION: Resistance training for six weeks increases muscle strength and power, and induces muscle hypertrophy, in men who are infected with HIV and recovering from substance abuse. These findings support the efficacy for including resistance training in the standard of care for men with HIV undergoing in-patient treatment for substance addiction/abuse