6,813 research outputs found
Liberalization in Directed Credit Programs for SMEs
To evaluate the effectiveness of approaches to improve policies toward the development of small and medium enterprises, this article assesses the efficiency of directed credit programs and the impact of a liberalized design of a specific project.credit program, borrowing behavior, borrower
Liberalization in Directed Credit Programs for SMEs
To evaluate the effectiveness of approaches to improve policies toward the development of small and medium enterprises, this article assesses the efficiency of directed credit programs and the impact of a liberalized design of a specific project.credit program, borrowing behavior, borrower
Design of an RSFQ Control Circuit to Observe MQC on an rf-SQUID
We believe that the best chance to observe macroscopic quantum coherence
(MQC) in a rf-SQUID qubit is to use on-chip RSFQ digital circuits for
preparing, evolving and reading out the qubit's quantum state. This approach
allows experiments to be conducted on a very short time scale (sub-nanosecond)
without the use of large bandwidth control lines that would couple
environmental degrees of freedom to the qubit thus contributing to its
decoherence. In this paper we present our design of a RSFQ digital control
circuit for demonstrating MQC in a rf-SQUID. We assess some of the key
practical issues in the circuit design including the achievement of the
necessary flux bias stability. We present an "active" isolation structure to be
used to increase coherence times. The structure decouples the SQUID from
external degrees of freedom, and then couples it to the output measurement
circuitry when required, all under the active control of RSFQ circuits.
Research supported in part by ARO grant # DAAG55-98-1-0367.Comment: 4 pages. More information and publications at
http://www.ece.rochester.edu:8080/users/sde/research/publications/index.htm
Analytical results for a Bessel function times Legendre polynomials class integrals
When treating problems of vector diffraction in electromagnetic theory, the
evaluation of the integral involving Bessel and associated Legendre functions
is necessary. Here we present the analytical result for this integral that will
make unnecessary numerical quadrature techniques or localized approximations.
The solution is presented using the properties of the Bessel and associated
Legendre functions.Comment: 4 page
Three dimensional rotational angiography imaging of double aortic arch vascular ring
Three dimensional (3D) rotational angiography is a technique used increasingly for
imaging in congenital heart disease. Here the use of this technique for imaging of
double aortic arch vascular ring is described and the advantages of this modality. are discussed. 3D rotational angiography is an excellent tool for imaging of various vascular anomalies. It provides high quality accurate images through a quick and safe procedure.peer-reviewe
The Short Rotation Period of Hi'iaka, Haumea's Largest Satellite
Hi'iaka is the larger outer satellite of the dwarf planet Haumea. Using
relative photometry from the Hubble Space Telescope and Magellan and a phase
dispersion minimization analysis, we have identified the rotation period of
Hi'iaka to be ~9.8 hrs (double-peaked). This is ~120 times faster than its
orbital period, creating new questions about the formation of this system and
possible tidal evolution. The rapid rotation suggests that Hi'iaka could have a
significant obliquity and spin precession that could be visible in light curves
within a few years. We then turn to an investigation of what we learn about the
(presently unclear) formation of the Haumea system and family based on this
unexpectedly rapid rotation rate. We explore the importance of the initial
semi-major axis and rotation period in tidal evolution theory and find they
strongly influence the time required to despin to synchronous rotation,
relevant to understanding a wide variety of satellite and binary systems. We
find that despinning tides do not necessarily lead to synchronous spin periods
for Hi'iaka, even if it formed near the Roche limit. Therefore the short
rotation period of Hi'iaka does not rule out significant tidal evolution.
Hi'iaka's spin period is also consistent with formation near its current
location and spin up due to Haumea-centric impactors.Comment: 21 pages with 6 figures, to be published in The Astronomical Journa
Titan's influence on Saturnian substorm occurrence
Substorms play an important role in the energization and transport of plasmas in planetary magnetospheres, including the shedding of the mass added by moons in the case of Jupiter and Saturn. Mass shedding occurs through rapid reconnection in the near tail resulting in dipolarization on the magnetospheric side of the reconnection point and plasmoid formation down tail. Observations of these sudden reconnection events in Saturn’s near-tail region provide additional insight into this process. Saturnian substorms, at least on occasion, have a plasmoid formation phase leading to a traveling compression region. Changes in the field strength across reconnection events suggest that open flux has been removed from the tail. The timing of tail reconnection events appears to be controlled by both the orbital phase of Titan, and the variable stretching of the near-tail field as Saturn rotates.Fil: Russell, C. T.. University of California; Estados UnidosFil: Jackman, C. M.. Imperial College London; Reino UnidoFil: Wei, H. Y.. University of California; Estados UnidosFil: Bertucci, Cesar. Consejo Nacional de InvestigaciĂłnes CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de AstronomĂa y FĂsica del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de AstronomĂa y FĂsica del Espacio; Argentina. Imperial College Of Science And Technology; Reino UnidoFil: Dougherty, M. K.. Imperial College Of Science And Technology; Reino Unid
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