46,482 research outputs found
Pacific Basin Communication Study, volume 2
Users' meeting summary report, chronology of visits, economic data for forum countries, techniques used in the study, communication choices, existing resources in the Pacific Basin, and warc 79 region 3 rules and regulations were presented in volume 2
Facial behaviour of analytic functions on the bidisk
We prove that if is an analytic function bounded by 1 on the bidisk
and is a point in a face of the bidisk at which satisfies
Caratheodory's condition then both and the angular gradient
exist and are constant on the face. Moreover, the class of all with
prescribed and can be parametrized in terms of
a function in the two-variable Pick class. As an application we solve an
interpolation problem with nodes that lie on faces of the bidisk.Comment: 18 pages. We have replaced an erroneous proof of Theorem 5.4(1) by a
valid proo
A New Operation on Sequences: the Boustrouphedon Transform
A generalization of the Seidel-Entringer-Arnold method for calculating the
alternating permutation numbers (or secant-tangent numbers) leads to a new
operation on integer sequences, the Boustrophedon transform.Comment: very minor change: corrected typo in author list. June 24 2002:
correction to a proof; additional reference
High-power, ultralow-mass solar arrays: FY-77 solar arrays technology readiness assessment report, volume 2
Development efforts are reported in detail for: (1) a lightweight solar array system for solar electric propulsion; (2) a high efficiency thin silicon solar cell; (3) conceptual design of 200 W/kg solar arrays; (4) fluorocarbon encapsulation for silicon solar cell array; and (5) technology assessment of concentrator solar arrays
Telerobotic workstation design aid
Telerobot systems are being developed to support a number of space mission applications. In low earth orbit, telerobots and teleoperated manipulators will be used in shuttle operations and space station construction/maintenance. Free flying telerobotic service vehicles will be used at low and geosynchronous orbital operations. Rovers and autonomous vehicles will be equipped with telerobotic devices in planetary exploration. In all of these systems, human operators will interact with the robot system at varied levels during the scheduled operations. The human operators may be in either orbital or ground-based control systems. To assure integrated system development and maximum utility across these systems, designers must be sensitive to the constraints and capabilities that the human brings to system operation and must be assisted in applying these human factors to system development. The simulation and analysis system is intended to serve the needs of system analysis/designers as an integrated workstation in support of telerobotic design
First order phase transition in the Quantum Adiabatic Algorithm
We simulate the quantum adiabatic algorithm (QAA) for the exact cover problem
for sizes up to N=256 using quantum Monte Carlo simulations incorporating
parallel tempering. At large N we find that some instances have a discontinuous
(first order) quantum phase transition during the evolution of the QAA. This
fraction increases with increasing N and may tend to 1 for N -> infinity.Comment: 5 pages, 3 figures. Replaced with published version; two figures
slightly changed and some small changes to the tex
High-Ampacity Power Cables of Tightly-Packed and Aligned Carbon Nanotubes
We characterize the current-carrying capacity (CCC), or ampacity, of
highly-conductive, light, and strong carbon nanotube (CNT) fibers by measuring
their failure current density (FCD) and continuous current rating (CCR) values.
We show, both experimentally and theoretically, that the CCC of these fibers is
determined by the balance between current-induced Joule heating and heat
exchange with the surroundings. The measured FCD values of the fibers range
from 10 to 10 A/m and are generally higher than the previously
reported values for aligned buckypapers, carbon fibers, and CNT fibers. To our
knowledge, this is the first time the CCR for a CNT fiber has been reported. We
demonstrate that the specific CCC (i.e., normalized by the linear mass density)
of our CNT fibers are higher than those of copper.Comment: 14 pages, 8 figure
Finite size scaling of the correlation length above the upper critical dimension
We show numerically that correlation length at the critical point in the
five-dimensional Ising model varies with system size L as L^{5/4}, rather than
proportional to L as in standard finite size scaling (FSS) theory. Our results
confirm a hypothesis that FSS expressions in dimension d greater than the upper
critical dimension of 4 should have L replaced by L^{d/4} for cubic samples
with periodic boundary conditions. We also investigate numerically the
logarithmic corrections to FSS in d = 4.Comment: 5 pages, 6 postscript figure
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