Separation of two bodies in space. A machine programmed analysis using the Lagrange equations and Eulerian angles

Fortran computer program and Lagrangian motion equations for separation analysis of two bodies in spac

Separation of two bodies in space

Computer program analyzes the motion of two rigid bodies in space, separating as a result of any one, or a combination of, the following mechanisms - springs with ball ends, springs with one end guided, pyrotechnics, rockets, cold-gas jets, air pistons, and Coulomb drag

Probing Satellite Quenching With Galaxy Clustering

Satellites within simulated massive clusters are significantly spatially correlated with each other, even when those satellites are not gravitationally bound to each other. This correlation is produced by satellites that entered their hosts relatively recently, and is undetectable for satellites that have resided in their hosts for multiple dynamical timescales. Therefore, a measurement of clustering statistics of cluster satellites may be used to determine the typical accretion redshifts of those satellites into their observed hosts. We argue that such measurements may be used to determine the fraction of satellite galaxies that were quenched by their current hosts, thereby discriminating among models for quenching of star formation in satellite galaxies.Comment: 7 page

Investigation of the reactivity of organic materials in liquid oxygen

Measurements of impact-ignition sensitivity and studies of the relative reactivity of t-butoxy and t-butyl peroxy radicals toward a variety of organic compounds reveal improved methods of selection of materials for safe use in a liquid oxygen environment

Zika Virus Communication Preferences of Pregnant Women: Beyond the Verbal

Background: Pregnant women are frequently a priority group during public health emergencies, including the current Zika virus outbreak. These women turn to prenatal care providers for health information, but providers may not have the time for discussions with every patient. Knowing alternative ways to communicate key Zika-related information to pregnant women is important. Methods: To determine pregnant women’s preferences for obtaining Zika information from their prenatal providers, a 27-item survey was administered to 408 pregnant women at four prenatal care clinics in Atlanta between May 5th, 2016 and June 20th, 2016. The anonymous survey evaluated women’s preferences for receiving information about three topics: Zika virus, maternal vaccines and safe medications. Chi-square and Fisher’s exact tests were used to determine statistical significance of associations between these topics and selected patient characteristics. Significance was evaluated at α=0.05. Results: Educational brochures (63.8%), e-mails (55.2%) and their provider’s practice website (40.2%) were women’s most preferred modalities for receiving information about Zika virus beyond verbal communication. Most women (73.2%) use the CDC website as their primary source of information about Zika virus; only 19.2% seek that information on their provider’s website. Conclusions: Conveying Zika-related information to pregnant women is essential. As public health practitioners create and refine provider-to-patient communications, they can use these findings to ensure their messages align with how women want to receive information (e.g., brochures, emails, provider websites) and take advantage of existing modalities (e.g. their own websites) that providers may not be fully utilizing

Investigation of reactivity of launch vehicle materials with liquid oxygen Quarterly report, 23 Jul. - 22 Oct. 1968

Reactivity of launch vehicle organic materials with liquid oxyge