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The Smurf Amplifier Registry is a blacklist of networks on the Internet which have been misconfigured in such a way that they can be used, as smurf amplifiers for smurf denial of service attacks. It can probe networks for vulnerability to smurf amplification, and then will either add them to its database, or remove them from the database ...
An astronaut asleep in the microgravity of Earth orbit-continual free-fall around the Earth, inside the pressurized module Harmony node of the International Space Station in 2007. Sleeping in space is part of space medicine and mission planning, with impacts on the health, capabilities and morale of astronauts.
Human presence in outer space began with the first launches of artificial object in the mid 20th century, and has increased to the point where Earth is orbited by a vast number of artificial objects and the far reaches of the Solar System have been visited and explored by a range of space probes.
The gyroklystron is a microwave amplifier with operation dependent on the cyclotron resonance condition. [13] Similarly to the klystron, its operation depends on the modulation of the electron beam, but instead of axial bunching the modulation forces alter the cyclotron frequency and hence the azimuthal component of motion, resulting in phase ...
Humans generally do poorly at generating random quantities. Magicians, professional gamblers and con artists depend on the predictability of human behavior. In World War II German code clerks were instructed to select three letters at random to be the initial rotor setting for each Enigma machine message. Instead some chose predictable values ...
YouTube and Lenovo announced the YouTube Space Lab competition on 10 October 2011. Applicants were challenged to design a microgravity experiment, and submissions closed in early December. [ 1 ] On 17 January 2012, YouTube Space Lab announced sixty finalists and started the voting process for the regional winners where over 150,000 YouTube ...
Human analog missions are activities undertaken on Earth in various environments to simulate aspects of human missions to other worlds, including the Moon, asteroids, and Mars. These remote field tests are performed in locations that are identified based on their physical similarities to the extreme space environments of a target mission. [ 1 ]
Once the tube is triggered, it conducts until the arc is interrupted by the current falling too low for too long (under 10 milliamperes for more than 100 microseconds for the KN22 krytrons). [ 2 ] Krytrons and sprytrons are triggered by a high voltage from a capacitor discharge via a trigger transformer , in a similar way flashtubes for e.g ...