88,755 research outputs found
International Governance of the Internet: An Economic Analysis.
ICANN currently determines which top level domains are available on the A-root server and so restricts the choices facing Internet users. Thus ICANN redistributes wealth and has become the focus of rent-seeking activities. Yet, despite my belief that the Internet will become substantially more regulated in the future, I am convinced that technology will trump the best efforts of regulators to “promote the public interest”.
Mod-2 wind turbine project assessment and cluster test plans
An assessment of the Mod-2 Wind Turbine project is presented based on initial goals and present results. Specifically, the Mod-2 background, project flow, and a chronology of events/results leading to Mod-2 acceptance is presented. After checkout/acceptance of the three operating turbines, NASA/LeRC will continue management of a two year test program performed at the DOE Goodnoe Hills test site. This test program is expected to yield data necessary for the continued development and optimization of wind energy systems. These test activities, the implementation of, and the results to date are also presented
Polarized Double Photon Production in QCD to Order
We present a complete order analysis of the process with polarized initial states, previously studied by us with
leading order structure functions. We include in our calculation new sets of
parton densities evolved in NLO QCD, such as those of Gehrmann and Stirling and
of Gl\"{u}ck et al., which incorporate the new anomalous dimensions of Mertig
and Van Neerven in the evolution equation. A detailed phenomenological analysis
is also given which includes the photon isolation. Our results indicate that
the asymmetries, although not very large, should be substantial enough at RHIC
energies to be measurable in future planned experiments.Comment: 29 pages revtex, 13 psfig
The 6670-Newton attitude-control thruster using hydrogen-oxygen propellant
The development of a reusable, attitude-control propulsion system for the space transportation system is discussed. A flight weight, gaseous oxygen attitude control thruster assembly was tested to obtain data on cyclic life, thermal and hydraulic characteristics, pulse response, and performance. The basic thruster components were tested in excess of 51,000 pulses and 660 seconds, steady state, with no degradation of the 93 percent characteristic exhaust velocity efficiency level. Nominal operating conditions were a chamber pressure of 207 N sq cm (300 psia), a mixture ratio of 4.0, a pulse width of 100 ms, and a pulse frequency of 2 Hz
Television noise reduction device
A noise reduction system that divides the color video signal into its luminance and chrominance components is reported. The luminance component of a given frame is summed with the luminance component of at least one preceding frame which was stored on a disc recorder. The summation is carried out so as to achieve a signal amplitude equivalent to that of the original signal. The averaged luminance signal is then recombined with the chrominance signal to achieve a noise-reduced television signal
Television noise-reduction device
System greatly improves signal-to-noise ratio with little or no loss in picture resolution. By storage of luminance component, which is summed with chrominance component, system performs mathematical integration of basically-repetitive television signals. Integration of signals over interval of their repetition causes little change in original signals and eliminates random noise
Geology and Geochemistry of the Ship Creek and Monashka Creek reservoirs, Southcentral Alaska
Graywacke from the Ship Creek watershed, dissolves incongruently in distilled water. The dissolution appears to follow a first-order rate law which in integrated form is:
k = -2.303/t log No-Q/No
where No is the concentration in ppm of Ca, Mg, Na or K in the graywacke,
Q is the total quantity of these ions leached in time t(days), k is the rate constant in days-1. Experimentally derived rate constants for the dissolution of graywacke in distilled water at 5oC are log k+2CA, -4.128 day-1; log k+2Mg, -6.174 day-1; log k+Na, -5.800 day-1; and log k+K, -5.249 day-1. The above constants are for 40 to +100 mesh graywacke. A surface area correction term must be inserted in the above equation if it is applied to a different size fraction.
Using the above equation and rate constants, the chemical composition of a water in contact with graywacke was calculated. With the exception of magnesium, the agreement between the calculated composition and that of Ship Creek water was good. Assuming that the groundwater in the Ship Creek
watershed contacts about 1.5X104cm2 graywacke per liter, 120 to 360 days
are required at 5oC to produce the concentration of ions observed in Ship
Creek.
Release of exchangeable H+ from the soil mat to the reservoir water will not significant1y lower the pH of the water.
Leaching of heavy metals from sulfides contained in the bedrock of
the two watersheds does not pose a water quality hazard.
Lineaments in the bedrock at Monashka Creek may provide channels through which water may seep from the reservoir. These are not expected to pose a problem in retaining water in the reservoir, but they may result in small, new springs down grade from the reservoir.The work upon which this report is based was supported by funds provided
by the United States Department of the Interior, Office of Water
Resources Research and Technology, as authorized by the Water Resources
Research Act of 1964, Public Law 88-379, as amended. (Project A-045-ALAS
Effective Employee Incentive Plans: Features and Implementation Processes
[Excerpt] This paper will evaluate the effectiveness of broad-based employee incentives, identifying the features of effective plans. For our purposes, “broad-based” is used to signal that more than 50 percent of employees are eligible for this variable pay plan. In addition, the terms “variable pay plan” and “pay for performance” are used interchangeably as they appeared in the original sources
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