1,650 research outputs found
A Riddle
Starting with a common NINE letter word in the English language, what word continues to be a commonly used word in the English language each time you remove a single letter
In ice radio detection of GZK neutrinos
Models for the source and propagation of cosmic rays are stressed by
observations of cosmic rays with energies eV. A key discriminant
between different models may be complementary observations of neutrinos with
energies eV. Independent of the source of the cosmic rays,
neutrinos are produced during propagation via the GZK mechanism. Event rates
for GZK neutrinos are expected to be in the range of per km yr,
suggesting a detector mass in excess of 1 Eg. Detection of radio cherenkov
emission from showers produced in Antarctic ice may be an economical way to
instrument such a large mass. It is suggested that a 100 km array of
antennas centered on Icecube may allow confirmation of the radio technique and
also increase the science achievable with Icecube by providing vertex
information for events with throughgoing muons.Comment: 8 pages, 3 figures, to be published in proceedings of RADHEP-200
An analysis and simulation of landings utilizing stored-energy lift Final report, May 12 - Nov. 30, 1967
Computerized simulation of aircraft landing deceleration with stored energy lif
Integrated lift/drag controller for aircraft
A system for altering the lift/drag characteristics of powered aircraft to provide a safe means of glide path control includes a control device integrated for coordination action with the aircraft throttle. Such lift/drag alteration devices as spoilers, dive brakes, and the like are actuated by manual operation of a single lever coupled with the throttle for integrating, blending or coordinating power control. Improper operation of the controller is inhibited by safety mechanisms
Integrated flight controller for light aircraft
Controller-throttle engages spoiler/dive brake system when throttle setting is below a fixed power setting and gradually increases effect of spoiler/dive brake as throttle is moved toward idle position; since action is automatically reversible, a sudden application of power abruptly terminates aerodynamic effects of spoiler/dive brake system
In-flight simulation study of decoupled longitudinal controls for the approach and landing of a STOL aircraft
In this decoupled concept, the natural interactions of the flight variables were suppressed, and the pilot operated a separate controller for each (fore-and-aft control column for flight path angle without speed or pitch attitude change, for example). The handling qualities of the decoupled airplane were judged to be very favorable. The precise path control led to small touchdown point dispersion along with consistently low sink rates. The decoupled control system provided significantly better flying qualities than did conventional SAS applied to the same basic airframe
Cosmic ray albedo gamma rays from the quiet sun
We estimate the flux of gamma-rays that result from collisions of high energy galactic cosmic rays with the solar atmosphere. An important aspect of our model is the propagation of cosmic rays through the magnetic fields of the inner solar systems. We use diffusion to model propagation down to the bottom of the corona. Below the corona we trace particle orbits through the photospheric fields to determine the location of cosmic ray interactions in the solar atmosphere and evolve the resultant cascades. For our nominal choice of parameters, we predict an integrated flux of gamma rays (at 1 AU) of F(E(sub gamma) greater than 100 MeV) approximately = 5 x 10(exp -8)/sq cm sec. This can be an order of magnitude above the galactic background and should be observable by the Energetic Gamma Ray experiment telescope (EGRET)
Car Sharing Program Offered
John Seckel writes about the car-sharing program offered on campus in 2013
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