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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.
For example, Robert Stickgold recounts having experienced the touch of rocks while falling asleep after mountain climbing. [6] This can also occur to people who have travelled on a small boat in rough seas or have been swimming through waves, shortly before going to bed, and they feel the waves as they drift to sleep, or people who have spent ...
A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.
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 ...
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.
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 ...
Note that not all discontinuous voltage-clamp amplifier support switching frequencies higher than 10 kHz. [10] For this to work, the cell capacitance must be higher than the electrode capacitance by at least an order of magnitude. Capacitance slows the kinetics (the rise and fall times) of currents.