Новости за 19.05.2017

Schick das mal rum. Einfach so, ohne Kontext. Deine Freunde werden sich freuen.

If the new investigation turns up no specific and explicit collusion between the Trump campaign and the Russian government, is that the end of the story? Julian Sanchez comments.

As Democrats call for Brett Kavanaugh's impeachment, we look back at the 19 federal officials who have been impeached.

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25 Indicted, Including Postal Worker, After MPD Drug Investigation

"... Gangs, guns, and drugs; that's what Memphis police say a seven-month long investigation uncovered. Prosecutors say that includes a U.S. postal working delivering drugs while delivering mail. He is one of 25 indicted people. A home on Bloombury in Cordova is vacant now ..."   

Abstract: NASA's Marshall Space Flight Center (MSFC), in collaboration with NASA's Goddard Space Flight Center (GSFC), Fox Valve Development Corp. and Oxford Lasers, is developing a set of venturi flow meters for use on the Europa Mission's propulsion subsystem. The requirement for the venturi flow meters' throat diameters is approximately 0.040". An early risk reduction activity conducted by MSFC revealed that a venturi flow meter produced by FOX with a throat diameter near 0.040" had much higher... Читать дальше...

Abstract: We describe a two year campaign of simultaneous automated meteor optical and head echo radar measurements conducted with the Middle Atmosphere Alomar Radar System (MAARSY). This campaign was established with the following goals: Compare trajectories as measured by MAARSY and the two optical stations for a range of meteoroid masses. Compare photometric and dynamic mass measured optically with radar-derived masses (inter-calibration of mass scales). Use the best observed simultaneous events... Читать дальше...

Herdroste und Buttplugs.

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Excerpts from the Red Folder

Abstract: The Europa mission and spacecraft design presented unique challenges for selection of valve seat materials that met the fluid compatibility requirements, and combined fluid compatibility and high radiation exposure level requirements. The Europa spacecraft pressurization system valves will be exposed to fully saturated propellant vapor for the duration of the mission. The effects of Nitrogen Tetroxide (NTO) and Monomethylhydrazine (MMH) propellant vapors on heritage valve seat materials... Читать дальше...

Abstract: Fluid Transient analysis is important for the design of spacecraft propulsion system to ensure structural stability of the system in the event of sudden closing or opening of the valve. Generalized Fluid System Simulation Program (GFSSP), a general purpose flow network code developed at NASA/MSFC is capable of simulating pressure surge due to sudden opening or closing of valve when thermodynamic properties of real fluid are available for the entire range of simulation. Specifically GFSSP... Читать дальше...

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Abstract: The anisotropy of the sporadic meteor background complicates meteor shower extraction. Using static orbital similarity criteria to identify shower members can produce too many false positives near sporadic sources. Concept: We use shower "analogs" to characterize the density of meteor orbits in a region of parameter space when the shower is not active.

Our elections guru assesses the various benchmarks that have been proposed for judging Labour's performance on 8 June

Abstract: In the past decade, NASA has formulated science mission concepts with an anticipation of landing spacecraft on the lunar surface, meteoroids, and other planets. Advancing thruster technology for spacecraft propulsion systems has been considered for maximizing science payload. Starting in 2010, development of In-Space Engine (designated as ISE-100) has been carried out. ISE-100 thruster is designed based on heritage Missile Defense Agency (MDA) technology aimed for a lightweight and efficient... Читать дальше...

Abstract: Originally, I was brought into the Design and Analysis Branch in the Crew and Thermal Systems to work on administrative tasks like archiving and scheduling. However, I ended up splitting my time between secretarial tasks and a technical project. My technical project was originally meant to be a wireless sensor package for the 20ft Spacecraft Thermal Vacuum Chamber in the B7 High Bay. I would be using a miniature wifi development board and a temperature/humidity sensor along with custom... Читать дальше...

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Abstract: I was assigned to mentor high school students for the 2017 First Robotics Competition. Using a team based approach, I worked with the students to program the robot and applied my electrical background to build the robot from start to finish. I worked with students who had an interest in electrical engineering to teach them about voltage, current, pulse width modulation, solenoids, electromagnets, relays, DC motors, DC motor controllers, crimping and soldering electrical components, Java... Читать дальше...

Abstract: The Perseid meteor shower has been observed for millennia and is known for its visually spectacular meteors and occasional outbursts. Normal activity displays Zenithal Hourly Rates (ZHRs) of approximately100. The Perseids were expected to outburst in 2016, primarily due to particles released during the 1862 and 1479 revolutions of parent Comet Swift-Tuttle. NASA's Meteoroid Environment Office predicted the timing, strength and duration of the outburst for spacecraft risk using the MSFC... Читать дальше...

THE DATE IS: DAY. MONTH. YEAR. For god's sake!

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Abstract: No abstract available

Twenty-five years after the end of the Soviet Union, Moscow is certainly ready to overcome its old Soviet image. That may have been on the authorities' minds when they drew up the redevelopment plan. But the only way the authorities could think of redesigning the urban landscape was through Soviet tactics.