Financing Canadian Innovation: Why Canada Should End Roadblocks to Foreign Private Equity

Canada’s cross-border tax laws raise barriers that needlessly discourage investment in Canadian private equity firms. We examine the harm these barriers cause, and propose ways of reducing them.cross-border taxation

Solving magnetostatic field problems with NASTRAN

Determining the three-dimensional magnetostatic field in current-induced situations has usually involved vector potentials, which can lead to excessive computational times. How such magnetic fields may be determined using scalar potentials is reviewed. It is shown how the heat transfer capability of NASTRAN level 17 was modified to take advantage of the new method

Mathematical determination of geometrical image aberrations in single and double mirror systems

Mathematical determination of geometrical image aberrations in single and double mirror system

Final Calibration of the Berkeley Extreme and Far-Ultraviolet Spectrometer on the ORFEUS-SPAS I and II Missions

The Berkeley Extreme and Far-Ultraviolet Spectrometer (BEFS) flew as part of the ORFEUS telescope on the ORFEUS-SPAS I and II space-shuttle missions in 1993 and 1996, respectively. The data obtained by this instrument have now entered the public domain. To facilitate their use by the astronomical community, we have re-extracted and re-calibrated both data sets, converted them into a standard (FITS) format, and placed them in the Multimission Archive at Space Telescope (MAST). Our final calibration yields improved wavelength scales and effective-area curves for both data sets.Comment: To appear in the January 2002 issue of the PASP. 17 pages with 9 embedded postscript figures; uses emulateapj5.st

Lower bounds for polynomials using geometric programming

We make use of a result of Hurwitz and Reznick, and a consequence of this result due to Fidalgo and Kovacec, to determine a new sufficient condition for a polynomial $f\in\mathbb{R}[X_1,...,X_n]$ of even degree to be a sum of squares. This result generalizes a result of Lasserre and a result of Fidalgo and Kovacec, and it also generalizes the improvements of these results given in [6]. We apply this result to obtain a new lower bound $f_{gp}$ for $f$, and we explain how $f_{gp}$ can be computed using geometric programming. The lower bound $f_{gp}$ is generally not as good as the lower bound $f_{sos}$ introduced by Lasserre and Parrilo and Sturmfels, which is computed using semidefinite programming, but a run time comparison shows that, in practice, the computation of $f_{gp}$ is much faster. The computation is simplest when the highest degree term of $f$ has the form $\sum_{i=1}^n a_iX_i^{2d}$, $a_i>0$, $i=1,...,n$. The lower bounds for $f$ established in [6] are obtained by evaluating the objective function of the geometric program at the appropriate feasible points

Thomas Jefferson Randolph, democratic leader

There has been considerable time spent in writing the life and accomplishments of Thomas Jefferson. Thomas Jefferson, although he had several children, never had a son. Therefore, Thomas Jefferson Randolph, the son of Martha Jefferson Randolph, was the most direct male descendant of the second President. However, no one has made an attempt to write the biography of the grandson . It is particularly appropriate to write his life not only because of Thomas Jefferson Randolph\u27s famous lineage but because he was an ardent adherent to the Democratic principles of his illustrious grandfather

Structural change in multipartite entanglement sharing: a random matrix approach

We study the typical entanglement properties of a system comprising two independent qubit environments interacting via a shuttling ancilla. The initial preparation of the environments is modeled using random-matrix techniques. The entanglement measure used in our study is then averaged over many histories of randomly prepared environmental states. Under a Heisenberg interaction model, the average entanglement between the ancilla and one of the environments remains constant, regardless of the preparation of the latter and the details of the interaction. We also show that, upon suitable kinematic and dynamical changes in the ancilla-environment subsystems, the entanglement-sharing structure undergoes abrupt modifications associated with a change in the multipartite entanglement class of the overall system's state. These results are invariant with respect to the randomized initial state of the environments.Comment: 10 pages, RevTeX4 (Minor typo's corrected. Closer to published version

Scripps Women and the Shaping of Anti-Vietnam War Activism: A Comprehensive Archival Study

Women have actively participated in various social movements across different times and locations, contributing their efforts in diverse capacities. The Long Sixties was a period of social activism, particularly for young, antiwar American college students. Literature shows that women and young students engaged for varying reasons against the Vietnam War. However, there is less research regarding the explicit role women played in the antiwar movement on women’s college campuses, specifically concerning how their relevant identities shaped their activism. Using a case study and network analysis alongside archival research, I perform an analysis of the political opportunity structures, framings, and networks related to antiwar activism on women’s college campuses. I find that Scripps women largely engaged with the issue of the Vietnam War as students and Americans rather than as women. Scripps women did reconstitute their gender identities through their activism and the cultural changes in the Long Sixties, challenging traditional notions of women’s activism. Scripps women did utilize available networks within the Claremont Colleges and at the national level to gain recognition and validation in their community and from the institutional leaders

Distribution of Interference in the Presence of Decoherence

We study the statistics of quantum interference for completely positive maps. We calculate analytically the mean interference and its second moment for finite dimensional quantum systems interacting with a simple environment consisting of one or several spins (qudits). The joint propagation of the entire system is taken as unitary with an evolution operator drawn from the Circular Unitary Ensemble (CUE). We show that the mean interference decays with a power law as function of the dimension of the Hilbert space of the environment, with a power that depends on the temperature of the environment.Comment: 28 pages of pd

Normal mode splitting in a coupled system of nanomechanical oscillator and parametric amplifier cavity

We study how an optical parametric amplifier inside the cavity can affect the normal mode splitting behavior of the coupled movable mirror and the cavity field. We work in the resolved sideband regime. The spectra exhibit a double-peak structure as the parametric gain is increased. Moreover, for a fixed parametric gain, the double-peak structure of the spectrum is more pronounced with increasing the input laser power. We give results for mode splitting. The widths of the split lines are sensitive to parametric gain.Comment: 7 pages,9 figure