An X-ray survey of 9 algol systems

The observed X-ray luminosities seen from an Einstein survey of nine Algol like systems are similar to those found by Pallavicini, et al. (1981) for single or widely separated rapidly rotating late stars, but fall an order of magnitude below those seen from RS CVn stars with similar orbital periods and spectral types. It is concluded that the X-ray emission is most probably associated with a hot coronae surrounding the secondary. Possible explanations for the lower luminosity of the Algol systems relative to the RS CVn systems are considered

The 805s X-ray pulsar H2252-035

The X-ray flux from the 3.6 hr binary system H2252-035 is shown to be modulated at a period of 805s. The spectrum is consistent with either a 1.4 photon index power law or 20 keV thermal model. A 560t0r-350 eV equivalent width iron line is seen at approximately 6.7 keV. The possibility that this system contains a slowly rotating neutron star is discussed

Micro-RNA, a Solution for Understanding Depression

Major depressive disorder is a mood disorder that causes sadness and loss of interest. This affects how one may feel, think, or behave which impact their physical and mental state. People who have been diagnosed with this disorder find themselves losing interest in things they once loved. In the United States there are 16.1 million Americans diagnosed with MDD. This disorder is more common in individuals who have had it in their families which has resulted in the interest in how different genes impact MDD. Micro-RNA has been researched and discovered to have a correlation with MDD. These Micro-RNA\u27s show an adaptive response to stress leading to either a resilience or development of this disorder. Once more is understood on effects that these Micro-RNA\u27s have on different genetic makeup, medication can be developed along with different therapies to help with different Micro-RNA. This could also help find and treat individuals who are more susceptible to this disorder before it proliferates

A 2 component X-ray spectrum from SMC X-1

Both HEAO-1 A2 and Einstein SSS observations of SMC X-1 are presented. An unpulsed soft component is found with a blackbody temperature of 0.16 keV and an area for the emission region of 10 to the 15th power sq cm to 10 to the 17th power sq cm. The hard X-ray component is pulsed; the phase averaged spectrum is a power law with alpha approximately 0.5 keV up to 17 keV above which it steepens. The SSS sets an upper limit of 4 x 10 to the 21st power H cm/2 to any absorption and is consistent with that expected from the wind of SK160. Absorption dips with a timescale of several hundred seconds are seen immediately following an eclipse exit and are probably caused by inhomogeneities in the wind of SK160

Abrasion by aeolian particles: Earth and Mars

Estimation of the rate of aeolian abrasion of rocks on Mars requires knowledge of: (1) particle flux, (2) susceptibilities to abrasion of various rocks, and (3) wind frequencies on Mars. Fluxes and susceptibilities for a wide range of conditions were obtained in the laboratory and combined with wind data from the Viking meteorology experiment. Assuming an abundant supply of sand-sized particles, estimated rates range up to 2.1 x 10 to the minus 2 power cm of abrasion per year in the vicinity of Viking Lander 1. This rate is orders of magnitude too great to be in agreement with the inferred age of the surface based on models of impact crater flux. The discrepancy in the estimated rate of abrasion and the presumed old age of the surface cannot be explained easily by changes in climate or exhumation of ancient surfaces. The primary reason is thought to be related to the agents of abrasion. At least some sand-sized (approx. 100 micrometers) grains appear to be present, as inferred from both lander and orbiter observations. High rates of abrasion occur for all experimental cases involving sands of quartz, basalt, or ash. However, previous studies have shown that sand is quickly comminuted to silt- and clay-sized grains in the martian aeolian regime. Experiments also show that these fine grains are electrostatically charged and bond together as sand-sized aggregates. Laboratory simulations of wind abrasion involving aggregates show that at impact velocities capable of destroying sand, aggregates from a protective veneer on the target surface and can give rise to extremely low abrasion rates

Masking Away Our Emotions

The use of face masks has the potential to greatly reduce the efficacy and ability of nonverbal communication during in-person social interactions. The purpose of this study is to determine the consequences and implications that face masks have on nonverbal communication, as well as the effect that the use of face masks has on an individual\u27s ability to perceive emotions based on facial expressions. It is believed that an individual would be statistically successful matching an unmasked facial expression to a pictured emotion, but not as statistically successful matching a masked facial expression to a pictured emotion. This study will be carried out via the use of a survey containing pictures of a person displaying various emotions, both with and without face masks, in which participants would be asked to match listed emotions with what they believe the acted emotion portray