8,161 research outputs found
Testing for causality of inflation in Latin America from the U.S. economy
No full textThesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1997.Includes bibliographical references (leaf 81).by Luis Alberto Rodriguez R.M.S
Bistatic TerraSAR-X/F-SAR Spaceborne-Airborne SAR Experiment: Description, Data Processing and Results
No full textWe report about the first X-band spaceborne-airborne bistatic SAR experiment,
using the German satellite TerraSAR-X as transmitter and DLR's new airborne
radar system F-SAR as receiver. The data were acquired early November 2007.
The importance of the experiment is not only due to its pioneering character, but
also due to its potential to serve as a test-bed for the validation of
non-stationary bistatic acquisition procedures, novel calibration and
synchronisation algorithms, and advanced imaging techniques, as required
for future non-synchronised bistatic SAR missions.
High-resolution bistatic imaging requires in general a perfect synchronisation of the
radar systems, which in the present case is achieved by evaluating the range
histories of several reference targets. After synchronisation, non-stationary
focussing is performed using a bistatic backprojection approach.
Benefiting from the flexibility of both acquisition systems, stand-alone TerraSAR-X
monostatic as well as interoperated TerraSAR-X/F-SAR bistatic data sets have been
recorded; the simultaneous availability of monostatic and bistatic images will help
to understand their similarities and differences. As expected, the bistatic
image shows a space-variant behaviour in spatial resolution and
signal-to-noise ratio; both outperform their monostatic
counterparts in almost the complete imaged scene.
A detailed comparison between the monostatic and bistatic images is
given, illustrating the complementarity of both measurements in terms of
available backscattered energy and Doppler information
On using Directional Information for Parameter Space Decomposition in Ellipse Detection
No full textIn this paper we use the parametric polar representation to extend the application of edge directional information from circle to ellipse extraction. As a result we obtain a mapping which decomposes the parameter space required for ellipse extraction into two independent sub-spaces and one final histogram accumulator. The mapping includes the tangent of the angle of the first and second directional derivatives. These tangents are computed by considering edge direction at two border points. We show that the use of gradient information for parameter space decomposition avoids the intensive point labelling imposed by geometric constraints used by other approaches
A taxonomic reassessment of rhodolith-forming species of Lithophyllum (Corallinales: Rhodophyta): in the Gulf of California, Mexico
No full textThesis (M.S.) -- San Jose State University, 1997.by Rafael Riosmena-Rodriguez."A thesis presented to the faculty of Moss Landing Marine Laboratories.""A thesis presented to the faculty of Moss Landing Marine Laboratories.
Viscoelastic properties of chitosan
No full textThesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nutrition and Food Science, 1983.MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE.Vita.Bibliography: leaves 155-160.by Dolores Mercedes Rodriguez-Sanchez Kienzle.M.S
Large-scale patterns in turbulent Rayleigh-Bénard convection in very large aspect ratio cells
No full textLarge-scale patterns, which are well-known from the spiral defect chaos regime of thermal convection at Rayleigh numbers Ra 105. They are uncovered when the turbulent fields are averaged in time and turbulent fluctuations are thus removed. We apply the Boussinesq closure to calculate turbulent viscosities and diffusivities, respectively. The resulting turbulent Rayleigh number Ra_, that describes the convection of the mean patterns, is indeed in the spiral defect chaos range. Interestingly, the turbulent Prandtl numbers are smaller than one with 0:2 _ Pr_ _ 0:4 for Prandtl numbers 0:7 _ Pr _ 10. Finally, we demonstrate that these mean flow patterns are robust to an additional finite-amplitude side wall-forcing when the level of turbulent fluctuations in the flow is sufficiently high
Reynolds number effect on 3D turbulent offset jet reattaching to a free surface
No full textExperimental study was carried out to investigate the effect of Reynolds number on 3D offset jet reattaching to above free surface. Sharp edged square nozzle was used to produce the jets, and the measurements were performed at the following six different Reynolds numbers: 2300, 3700, 5100, 7900, 10300 and 11900. Detailed velocity measurements were made in the symmetry plane. From the PIV data, the mean velocity and turbulence statistics were obtained to study the effects of Reynolds number on the salient features of the jet flow. Preliminary results on streamwise mean velocity decay along the nozzle centerline, contours of streamwise mean velocity and Reynolds shear stress are presented herein
The Benefits of Being Economics Professor A (and not Z)
No full textAlphabetic name ordering on multi-authored academic papers, which is the convention in the economics discipline and various other disciplines, is to the advantage of people whose last name initials are placed early in the alphabet. As it turns out, Professor A, who has been a first author more often than Professor Z, will have published more articles and experienced afaster growth rate over the course of her career as a result of reputation and visibility. Moreover, authors know that name ordering matters and indeed take ordering seriously: Several characteristics of an author group composition determine the decision to deviate from the default alphabetic name order to a significant extent.performance measurement, incentives, economists, name ordering
<i>Entrenchment, wealth, power, and the constitution of democratic societies</i> by Paul Starr
No full textEntrenchment, Wealth, Power, and the Constitution of Democratic Societies, by Paul Starr, New Haven, CT: Yale University Press. 2019. 280 pages, hardcover.Why should we, as Management scholars and educators, care about a book on political diagnosis? The answer is twofold. First, the calibre of the author (Paul Starr), an awardee of both Bancroft and Pulitzer Prizes, a former policy advisor to the Clinton administration, and the author of The Transformation of American Medicine (1982), a book with a profound impact on American policy circles. Second, the core concept (entrenchment) of the book, and its potential to advance the process of institutional development, and the ways in which we can reform and change our institutions to better meet the current and pressing needs of the many, rather than preserve the unequal privileges of a few. In light of the geopolitical, social, and environmental pressures we see currently rising across the world (George, Howard-Grenville, Joshi & Tihanyi, 2016; Howard-Grenville, Buckle, Hoskins & George, 2014) there is no better time to examine whether and how we can address some of these grand challenges by reforming and improving our institutions
M.S. Kutorga and V.M. Vedrov: Conflict of Teacher and Student
No full textВ статье рассматривается конфликт между М.С. Куторгой и его учеником В.М. Ведровым. Исследуются причины конфликта, а также то влияние, которое он оказал на дальнейшую научную карьеру ученика. This article discusses the conflict between M.S. Kutorga and his student V.M. Vedrov. The author investigates the causes of the conflict and its impact on academic career V.M. Vedrov
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