Unifying the Fixed Order Evolution of Fragmentation Functions with the Modified Leading Logarithm Approximation

An approach which unifies the Double Logarithmic Approximation at small x and the leading order DGLAP evolution of fragmentation functions at large x is presented. This approach reproduces exactly the Modified Leading Logarithm Approximation, but is more complete due to the degrees of freedom given to the quark sector and the inclusion of the fixed order terms. We find that data from the largest x values to the peak region can be better fitted than with other approaches

Time-valued-technology: A Light-emitting Diode Case Study for Determining Replacement Strategy for High Technology Infrastructure Items

Infrastructure projects have typically involved long-term investments in relatively mature technologies characterized by stable performance and cost. However, with the ever-increasing rate of technological innovation, an increasing number of potential infrastructure investments involve a decision to replace a traditional technology with a rapidly evolving technology. In such circumstances, it is possible to reap significant performance or cost advantages through near-term replacement. However, this rapid adoption strategy has the potential to incur an opportunity cost due to increased performance or cost advantages the technology would provide if replacement was delayed. This research develops a cost analysis method, referred to as time-valued-technology, which may be useful in developing a strategic approach to the replacement of infrastructure with a rapidly emerging technology. The utility of this method is illustrated through an evaluation of replacement of the 250-watt streetlight fixtures on 64 United States Air Force installations with light-emitting diode based technology. Potential financial savings in implementing time valued technology over existent methods ranged from 1.10 to 14.15 percent per installation, averaging 6.77 percent

Variational objective analyses for cyclone studies

The basic analysis equations, i.e., the two horizontal momentum equations, the hydrostatic equation, and the integrated continuity equation were derived for the nonlinear vertical coordinate, nondimensionalized, and expressed in finite differences on a staggered grid. Special care was taken to transform the hydrostatic equation and the pressure gradient terms of the horizontal momentum equations to nearly eliminate truncation error over steeply sloping terrain. This formulation also eliminated explicit reference to orographically induced variations in the thermodynamic variables so that the variational adjustments are on the scale of the meteorological perturbations. The analysis equations were subjected to the Euler-Lagrange operations as expressed for finite differences and an additional set of five partial differential equations was derived, bringing to nine the number of equations in Model I. Higher order terms, terms containing observed quantities, and terms containing none of the variables to be adjusted were grouped into forcing functions and the equations were solved for the zero order terms. Zero order variables were eliminated between these equations and there resulted two diagnostic equations which take the form of general linear second order partial differential equations with nonconstant coefficients

Development of a sterilizable ruggedized vidicon for lunar and planetary photography Interim technical report, 21 May 1965 - 21 Aug. 1966

Sterilizable ruggedized vidicon for lunar and planetary photograph

Development of a sterilizable ruggedized vidicon for lunar and planetary photography Final report, 21 May 1965 - 21 Nov. 1967

Sterilizable ruggedized vidicon for lunar and planetary photograph

A Monte Carlo Study on the Dynamical Fluctuations Inside Quark and Antiquark Jets

The dynamical fluctuations inside the quark and antiquark jets are studied using Monte Carlo method. Quark and antiquark jets are identified from the 2-jet events in e+e- collisions at 91.2 GeV by checking them at parton level. It is found that transition point exists inside both of these two kinds of jets. At this point the jets are circular in the transverse plane with respect to the property of dynamical fluctuations. The results are consistent with the fact that the third jet (gluon jet) was historically first discovered in e+e- collisions in the energy region 17-30 GeV.Comment: 9 pages, 4 figure

A proposal for the coherent propagation studies portion of the 10.6-micrometer laser communications experiment Advanced Technology Satellite-F technical proposal

Coherent propagation study proposal for ATS-F 10.6 micrometer laser communications experimen