1,983 research outputs found
Aerospace medicine and biology: A continuing bibliography with indexes (supplement 333)
This bibliography lists 122 reports, articles and other documents introduced into the NASA Scientific and Technical Information System during January, 1990. Subject coverage includes: aerospace medicine and psychology, life support systems and controlled environments, safety equipment, exobiology and extraterrestrial life, and flight crew behavior and performance
Wavefront control experiments with a single mode fiber at the High-Contrast Spectroscopy Testbed for Segmented Telescopes (HCST)
Achieving high levels of contrast over broad bandwidths with segmented aperture telescopes is a key requirement to maximize the scientific yield for future exoplanet imaging missions and ground-based extremely large telescopes. The High-Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) in the Exoplanet Technology Laboratory (ET Lab) at Caltech is designed to proof test new technologies aimed at tackling some of the most pressing and challenging goals of exoplanet science, namely the imaging and spectroscopic characterization of small planets across a wide range of stellar host types, including temperature Earth-size planets. Here we report on the status of a key milestone: Demonstration of 20% bandwidth nulling experiments using single mode fibers wavefront control
Computation of Poincare-Betti series for monomial rings
The multigraded Poincare-Betti series P_R^k(x_1,...,x_n; t) of a monomial
ring k[x_1,...,x_n]/ on a finite number of monomial generators has the form
(1+tx_1)(1+tx_2)...(1+tx_n)/b_(R,k)(x_1,...,x_n; t), where
b_(R,k)(x_1,...,x_n;t) is a polynomial depending only on the monomial set M and
the characteristic of the field k. I present a computer program designed to
calculate the polynomial b_(R,k) for a given field characteristic and a given
set of monomial generators.Comment: 8 pages, prepared for the School and Workshop on Algebraic geometry
and statistics at Politecnico Torino in September 200
Lateral Chirality-sorting Optical Spin Forces in Evanescent Fields
The transverse component of the spin angular momentum of evanescent waves
gives rise to lateral optical forces on chiral particles, which have the
unusual property of acting in a direction in which there is neither a field
gradient nor wave propagation. As their direction and strength depends on the
chiral polarizability of the particle, they act as chirality-sorting and may
offer a mechanism for passive chirality spectroscopy. The absolute strength of
the forces also substantially exceeds that of other recently predicted sideways
optical forces, such that they may more readily offer an experimental
confirmation of the phenomenon.Comment: 7 pages, 2 Figure
IMPLICATIONS FOR TRADE TENSIONS AND DISPUTES FROM STRUCTURAL IMPACTS OF THE NAFTA: A U.S. PORK INDUSTRY PERSPECTIVE
International Relations/Trade,
Quantum Spin Stabilized Magnetic Levitation
We theoretically show that, despite Earnshaw's theorem, a non-rotating single
magnetic domain nanoparticle can be stably levitated in an external static
magnetic field. The stabilization relies on the quantum spin origin of
magnetization, namely the gyromagnetic effect. We predict the existence of two
stable phases related to the Einstein--de Haas effect and the Larmor
precession. At a stable point, we derive a quadratic Hamiltonian that describes
the quantum fluctuations of the degrees of freedom of the system. We show that
in the absence of thermal fluctuations, the quantum state of the nanomagnet at
the equilibrium point contains entanglement and squeezing.Comment: Published version. 5 pages, 2 figure
Innovation through pertinent patents research based on physical phenomena involved
One can find innovative solutions to complex industrial problems by looking for knowledge in patents. Traditional search using keywords in databases of patents has been widely used. Currently, different computational methods that limit human intervention have been developed. We aim to define a method to improve the search for relevant patents in order to solve industrial problems and specifically to deduce evolution opportunities. The non-automatic, semi-automatic, and automatic search methods use keywords. For a detailed keyword search, we propose as a basis the functional decomposition and the analysis of the physical phenomena involved in the achievement of the function to fulfill. The search for solutions to design a bi-phasic separator in deep offshore shows the method presented in this paper
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