58,566 research outputs found
Baryon Spin and Magnetic Moments in Relativistic Chiral Quark Models
Spin-flavor fractions of quarks in the proton and several hyperons are
obtained from their lowest order chiral fluctuations involving Goldstone
bosons. SU(3) flavor breaking, relativistic effects and the axial anomaly are
included. The validity of the Karl-Sehgal formulas for magnetic moments is
studied as well.Comment: 24 pages, 7 tables, no figure
A Lagrange-D'Alembert formulation of the equations of motion of a helicopter carrying an externally suspended load
The exact nonlinear equations of motion are derived for a helicopter with an extenal load suspended by fore and aft, rigid-link cables. Lagrange's form of D'Alembert's principle is used. Ten degrees of freedom are necessary to represent the motion of this system in an inertial reference frame: six for the helicopter relative to inertial space and four for the load relative to the helicopter
Application of NASAP to the design of communication circuits
Modifications to CDC 3600 NASAP for design of linear communication circuit
COPTRAN - A method of optimum communication systems design
Single set of mathematical expressions describes system cost and probability of error of data transmission in terms of four basic parameters in the link equation. A Lagrange multiplier sets up equations whose solutions yield the optimum values for system design considerations and weight and cost values
Solid state crystal physics at very low temperatures
The properties of nearly perfect crystals was studied at cryogenic temperatures. A large Helium 3 and Helium 4 dilution refrigerator has been assembled, and is described. A cryostat suitable for cooling a 35 liter volume to .020 Kelvin was designed and constructed, together with instrumentation to observe the properties of nearly perfect crystals
Properties of large nearly perfect crystals at very low temperatures
A liquid helium cryostat of a size and construction unavailable commercially, was built for use in measuring the Q of several materials at milli-Kelvin temperatures. The design and testing of the cryostat is described as well as the design of the experiment vacuum chamber and adaptor for the dilution refrigerator insert. Theory, design, and testing are also discussed for the magnetic coils built to levitate the materials so as to isolate them and increase the measured Q. A four point suspension with capacitor end plates as the transducer was used to obtain preliminary Q measurements of 6061 aluminum alloy and single crystal silicon. Results are tabulated
Measurements of antenna impedance in the ionosphere. II. Observing frequency greater than the electron gyro frequency
Short dipole antenna impedance measurements in ionosphere at observing frequency above electron gyrofrequenc
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