Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Robert C. Costen"'
Publikováno v:
Advanced Materials. 20:2074-2079
Electromechanical coupling effects in polymers have been routinely employed to create an array of sensors and actuators. The most dominant coupling effects originate from piezoelectric, electrostrictive, and electrostatic (also known as the Maxwell e
Autor:
Stuart Lindsay, Garrett Davis, Thomas Lowry, David Brosnahan, Jared Bunker, Gerald D. Watt, Robert C. Costen, Paolo Arosio, Bo Zhang, Sang Choi
Publikováno v:
Biophysical Chemistry. 114:235-244
The discrepancy between predicted and measured H(2)O(2) formation during iron deposition with recombinant heavy human liver ferritin (rHF) was attributed to reaction with the iron protein complex [Biochemistry 40 (2001) 10832-10838]. This proposal wa
Publikováno v:
Biophysical Chemistry. 111:173-181
The reaction of horse spleen ferritin (HoSF) with Fe2+ at pH 6.5 and 7.5 using O2, H2O2 and 1:1 a mixture of both showed that the iron deposition reaction using H2O2 is approximately 20- to 50-fold faster than the reaction with O2 alone. When H2O2 wa
Publikováno v:
SPIE Proceedings.
Recently a new class of electrostrictive polymers, called electrostrictive graft elastomers, was developed at NASA Langley Research Center. In this work, the output force of a bending actuator made from electrostrictive graft elastomer was measured a
Publikováno v:
Journal of Aircraft. 13:495-499
It is demonstrated that wing-tip vortices with buoyant cores can be made in a wind tunnel. Wing-tip vortices generated by an aircraft often become buoyant, because of heating effects due to the jet exhaust or in connection with a descending motion in
Equations for the propagation of finite local disturbances in vector fields of physics and mechanics
Autor:
Robert C. Costen
Publikováno v:
Journal of Mathematical Physics. 20:1439-1445
The purpose of this theoretical investigation is to determine the propagation velocities of local disturbances that may occur in the curl and divergence of a vector field v that satisfies the equation ∂v/∂t+f=0, where f is a general vector field.
Autor:
Robert C. Costen
Publikováno v:
Journal of Mathematical Physics. 22:1377-1385
Jump conditions are derived for a basic set of first order partial differential equations whose fields have infinite, integrable singularities, as well as finite discontinuities, at a moving and deforming interface. These basic formulas are then appl
Autor:
Robert C. Costen
Publikováno v:
Journal of Aircraft. 9:406-412
18 Sacks, A. H., Lundberg, R. E., and Hanson, C. W., "A Theoretical Investigation of the Aerodynamics of Slender WingBody Combinations Exhibiting Leading-Edge Separation," CR-719, 1967, NASA. 19 Murty, G. S. and Sankara-Rao, K., "Numerical Study of a
Publikováno v:
Journal of Geophysical Research. 93:15941
Cloud pumping data based on tropical maritime updraft statistics are incorporated in a one-dimensional steady-state eddy diffusive photochemical model of the troposphere. It is suggested that regions with weaker convection, such as the midlatitudes,
Autor:
Robert C. Costen
Publikováno v:
Journal of Aircraft. 10:320-320
For stable systems, the eigenvalues are complex with a negative real part for underdamped modes. In this case, both the eigenvalues and eigenvectors occur in complex conjugate pairs and Eq. (18) can be expressed in real form by TV terms. In conclusio