7,069 research outputs found

    A differential calculus for multifunctions

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    Mathematical analysis of multifunction

    An optimum settling problem for time lag systems

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    Lagrange multiplier in Banach space for settling optimal control in time lag syste

    The synthesis of optimal controls for linear problems with retarded controls

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    Synthesis of optimal controls for linear systems with retarded control

    Juries in U.S. Patent Cases: A Comparative Portrait of the Boundaries of Democracy

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    “It is clear that juries will necessarily differ in ‘competence,’ but it is at best incongruous to suggest that a society that sends its citizens routinely into space could never produce a jury competent to determine a case some judge might consider too ‘complex’ for people with ‘common experience’ to decide.

    Vascular Injury After Whole Thoracic X-Ray Irradiation in the Rat

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    Purpose To study vascular injury after whole thoracic irradiation with single sublethal doses of X-rays in the rat and to develop markers that might predict the severity of injury. Methods and Materials Rats that received 5- or 10-Gy thorax-only irradiation and age-matched controls were studied at 3 days, 2 weeks, and 1, 2, 5, and 12 months. Several pulmonary vascular parameters were evaluated, including hemodynamics, vessel density, total lung angiotensin-converting enzyme activity, and right ventricular hypertrophy. Results By 1 month, the rats in the 10-Gy group had pulmonary vascular dropout, right ventricular hypertrophy, increased pulmonary vascular resistance, increased dry lung weights, and decreases in total lung angiotensin-converting enzyme activity, as well as pulmonary artery distensibility. In contrast, irradiation with 5 Gy resulted in only a modest increase in right ventricular weight and a reduction in lung angiotensin-converting enzyme activity. Conclusion In a previous investigation using the same model, we observed that recovery from radiation-induced attenuation of pulmonary vascular reactivity occurred. In the present study, we report that deterioration results in several vascular parameters for ≤1 year after 10 Gy, suggesting sustained remodeling of the pulmonary vasculature. Our data support clinically relevant injuries that appear in a time- and dose-related manner after exposure to relatively low radiation doses

    Elastic and Inelastic Scattering of 270 MeV Helions from 58-Ni, 90-Zr, 116-Sn, and 208-Pb

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    This research was sponsored by the National Science Foundation Grant NSF PHY 87-1440

    Dynamic phase transition properties and hysteretic behavior of a ferrimagnetic core-shell nanoparticle in the presence of a time dependent magnetic field

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    We have presented dynamic phase transition features and stationary-state behavior of a ferrimagnetic small nanoparticle system with a core-shell structure. By means of detailed Monte Carlo simulations, a complete picture of the phase diagrams and magnetization profiles have been presented and the conditions for the occurrence of a compensation point TcompT_{comp} in the system have been investigated. According to N\'{e}el nomenclature, the magnetization curves of the particle have been found to obey P-type, N-type and Q-type classification schemes under certain conditions. Much effort has been devoted to investigation of hysteretic response of the particle and we observed the existence of triple hysteresis loop behavior which originates from the existence of a weak ferromagnetic core coupling Jc/JshJ_{c}/J_{sh}, as well as a strong antiferromagnetic interface exchange interaction Jint/JshJ_{int}/J_{sh}. Most of the calculations have been performed for a particle in the presence of oscillating fields of very high frequencies and high amplitudes in comparison with exchange interactions which resembles a magnetic system under the influence of ultrafast switching fields. Particular attention has also been paid on the influence of the particle size on the thermal and magnetic properties, as well as magnetic features such as coercivity, remanence and compensation temperature of the particle. We have found that in the presence of ultrafast switching fields, the particle may exhibit a dynamic phase transition from paramagnetic to a dynamically ordered phase with increasing ferromagnetic shell thickness.Comment: 12 pages, 12 figure

    Elastic Scattering of 270 MeV 3-He Particles

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    This work was supported by the National Science Foundation Grant NSF PHY 81-14339 and by Indiana Universit

    Comparison between two mobile absolute gravimeters: optical versus atomic interferometers

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    We report a comparison between two absolute gravimeters: the LNE-SYRTE cold atoms gravimeter and FG5#220 of Leibniz Universit\"at of Hannover. They rely on different principles of operation: atomic and optical interferometry. Both are movable which enabled them to participated to the last International Comparison of Absolute Gravimeters (ICAG'09) at BIPM. Immediately after, their bilateral comparison took place in the LNE watt balance laboratory and showed an agreement of 4.3 +/- 6.4 {\mu}Gal
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