859 research outputs found
Marian Gallagher, Professional: Librarian, Scholar, Teacher
For more than three decades Marian G. Gallagher has been Law Librarian and Professor of Law at the University of Washington School of Law. During this time she has become one of the most highly respected and warmly regarded members of the Washington legal and university communities. Total professional competency and continued excellence in job performance have commanded the respect; a keen intellect, unfailing courtesy and consideration, and a delightful wit have engendered the affection
Security Transactions—Priority—Federal Tax Liens and Future Advance Mortgages
In American Surety Co. v. Sundberg the Washington Supreme Court made a startling encroachment upon the sanctity of a secured mortgage. Using the United States Supreme Court\u27s test of choateness, the court held that the lien of a mortgage securing future advances is subordinate to federal tax liens filed subsequent to the filing of the mortgage, but prior to advances for which the lien was claimed
Dynamical conductivity at the dirty superconductor-metal quantum phase transition
We study the transport properties of ultrathin disordered nanowires in the
neighborhood of the superconductor-metal quantum phase transition. To this end
we combine numerical calculations with analytical strong-disorder
renormalization group results. The quantum critical conductivity at zero
temperature diverges logarithmically as a function of frequency. In the
metallic phase, it obeys activated scaling associated with an
infinite-randomness quantum critical point. We extend the scaling theory to
higher dimensions and discuss implications for experiments.Comment: 4 pages, 2 figures; (v2) minor typos corrected, published versio
From stripe to checkerboard order on the square lattice in the presence of quenched disorder
We discuss the effects of quenched disorder on a model of charge density wave
(CDW) ordering on the square lattice. Our model may be applicable to the
cuprate superconductors, where a random electrostatic potential exists in the
CuO2 planes as a result of the presence of charged dopants. We argue that the
presence of a random potential can affect the unidirectionality of the CDW
order, characterized by an Ising order parameter. Coupling to a unidirectional
CDW, the random potential can lead to the formation of domains with 90 degree
relative orientation, thus tending to restore the rotational symmetry of the
underlying lattice. We find that the correlation length of the Ising order can
be significantly larger than the CDW correlation length. For a checkerboard CDW
on the other hand, disorder generates spatial anisotropies on short length
scales and thus some degree of unidirectionality. We quantify these disorder
effects and suggest new techniques for analyzing the local density of states
(LDOS) data measured in scanning tunneling microscopy experiments.Comment: 10 pages, 11 figures; added referenc
North Pacific Fisheries Treaties and International Law of the Seas
Fisheries problems in the North Pacific are not new. In the past century, disputes between nations have developed over whaling, fur sealing, halibut and salmon fishing. Currently, crises are again in the making concerning the utilization of certain fishery stocks of this area. The purpose of this comment is to provide a framework of international law of the sea concepts within which the current problems can be examined
Hot stuff: Research and policy principles for heat decarbonisation through smart electrification
This is the author accepted manuscript. The final version is available on open access from Elsevier via the DOI in this recordThere is a need for major greenhouse gas emission reductions from heating in order to meet global decarbonisation goals. Electricity is expected to meet much of the heat demand currently provided by fossil fuels in the future and heat pumps may have an important role. This electrification transformation is not without challenges. Through a detailed narrative review alongside expert elicitation, we propose four principles for heat decarbonisation via electrification: putting energy efficiency first, valuing heat as a flexible load, understanding the emission impacts of heat electrification and designing electricity tariffs to reward flexibility. As a route to heat decarbonisation, when combined, these principles can offer significant consumer and carbon reduction benefits. In the short term these principles can encourage the smooth integration of heat electrification and in the longer term these principles are expected to reduce the scale of required infrastructural expansion. We propose a number of policy mechanisms which can be used to support these principles including (building) regulation, financial support, carbon standards, energy efficiency obligations and pricing.Engineering and Physical Sciences Research Council (EPSRC
Nonlinear ac conductivity of one-dimensional Mott insulators
We discuss a semiclassical calculation of low energy charge transport in
one-dimensional (1d) insulators with a focus on Mott insulators, whose charge
degrees of freedom are gapped due to the combination of short range
interactions and a periodic lattice potential. Combining RG and instanton
methods, we calculate the nonlinear ac conductivity and interpret the result in
terms of multi-photon absorption. We compare the result of the semiclassical
calculation for interacting systems to a perturbative, fully quantum mechanical
calculation of multi-photon absorption in a 1d band insulator and find good
agreement when the number of simultaneously absorbed photons is large.Comment: Dedicated to Thomas Nattermann on the occasion of his 60th birthday.
To appear in JSTAT. 5 pages, 2 figure
Partition Functions of Non-Abelian Quantum Hall States
Partition functions of edge excitations are obtained for non-Abelian Hall
states in the second Landau level, such as the anti-Read-Rezayi state, the
Bonderson-Slingerland hierarchy and the Wen non-Abelian fluid, as well as for
the non-Abelian spin-singlet state. The derivation is straightforward and
unique starting from the non-Abelian conformal field theory data and solving
the modular invariance conditions. The partition functions provide a complete
account of the excitation spectrum and are used to describe experiments of
Coulomb blockade and thermopower.Comment: 42 pages, 3 figures; published version; minor corrections to sect.
4.
Portfolio Optimization and the Random Magnet Problem
Diversification of an investment into independently fluctuating assets
reduces its risk. In reality, movement of assets are are mutually correlated
and therefore knowledge of cross--correlations among asset price movements are
of great importance. Our results support the possibility that the problem of
finding an investment in stocks which exposes invested funds to a minimum level
of risk is analogous to the problem of finding the magnetization of a random
magnet. The interactions for this ``random magnet problem'' are given by the
cross-correlation matrix {\bf \sf C} of stock returns. We find that random
matrix theory allows us to make an estimate for {\bf \sf C} which outperforms
the standard estimate in terms of constructing an investment which carries a
minimum level of risk.Comment: 12 pages, 4 figures, revte
Neutral mode heat transport and fractional quantum Hall shot noise
We study nonequilibrium edge state transport in the fractional quantum Hall
regime for states with one or several counter-propagating neutral modes. We
consider a setup in which the neutral modes are heated by a hot spot, and where
heat transported by the neutral modes causes a temperature difference between
the upper and lower edges in a Hall bar. This temperature difference is probed
by the excess noise it causes for scattering across a quantum point contact. We
find that the excess noise in the quantum point contact provides evidence for
counter-propagating neutral modes, and we calculate its dependence on both the
temperature difference between the edges and on source drain bias.Comment: 4 pages, 3 figure
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