4,989 research outputs found
Carrier Recombination and Generation Rates for Intravalley and Intervalley Phonon Scattering in Graphene
Electron-hole generation and recombination rates for intravalley and
intervalley phonon scattering in Graphene are presented. The transverse and the
longitudinal optical phonon modes (-modes) near the zone center
(-point) contribute to intravalley interband carrier scattering. At the
zone edge (-point), only the transverse optical phonon mode
(-mode) contributes significantly to intervalley interband scattering
with recombination rates faster than those due to zone center phonons. The
calculated recombination times range from less than a picosecond to more than
hundreds of picoseconds and are strong functions of temperature and electron
and hole densities. The theoretical calculations agree well with experimental
measurements of the recombination rates of photoexcited carriers in graphene.Comment: 6 pages, 9 figure
Dual equilibrium in a finite aspect ratio tokamak
A new approach to high pressure magnetically-confined plasmas is necessary to
design efficient fusion devices. This paper presents an equilibrium combining
two solutions of the Grad-Shafranov equation, which describes the
magnetohydrodynamic equilibrium in toroidal geometry. The outer equilibrium is
paramagnetic and confines the inner equilibrium, whose strong diamagnetism
permits to balance large pressure gradients. The existence of both equilibria
in the same volume yields a dual equilibrium structure. Their combination also
improves free-boundary mode stability
ABDERITID MARSUPIALS FROM THE MIOCENE OF PATAGONIA: AN ASSESSMENT OF FORM, FUNCTION, AND EVOLUTION
Equitable Conversion in Washington: The Doctrine That Dares Not Speak Its Name
Since the 1925 decision of Ashford v. Reese, Washington has had the distinction of being the only American jurisdiction totally, albeit implicitly, to reject the doctrine of equitable conversion. Ashford was overruled in 1977, in a remarkable opinion which simultaneously, and explicitly, rejected the doctrine of equitable conversion, thus maintaining Washington\u27s unique status with respect to that doctrine. But the opinion failed to provide a substitute for either the rule of Ashford or the contrary doctrine of equitable conversion, both of which it emphatically abjured. The result is an unbroken line of Washington cases consistent with only one rule of law-the doctrine of equitable conversion. The effect of the opinion is thus de jure rejection and de facto adoption of equitable conversion. This article will analyze the process by which Washington has managed to achieve substantial conformity with the majority of American jurisdictions, while resolutely maintaining a unique stance
Equitable Conversion in Washington: The Doctrine That Dares Not Speak Its Name
Since the 1925 decision of Ashford v. Reese, Washington has had the distinction of being the only American jurisdiction totally, albeit implicitly, to reject the doctrine of equitable conversion. Ashford was overruled in 1977, in a remarkable opinion which simultaneously, and explicitly, rejected the doctrine of equitable conversion, thus maintaining Washington\u27s unique status with respect to that doctrine. But the opinion failed to provide a substitute for either the rule of Ashford or the contrary doctrine of equitable conversion, both of which it emphatically abjured. The result is an unbroken line of Washington cases consistent with only one rule of law-the doctrine of equitable conversion. The effect of the opinion is thus de jure rejection and de facto adoption of equitable conversion. This article will analyze the process by which Washington has managed to achieve substantial conformity with the majority of American jurisdictions, while resolutely maintaining a unique stance
The case for a Torres Strait Islanderâdriven, longâterm research agenda for environment, health and wellbeing
[Extract] Researchers and communities are seeking strategies to manage complex challenges regarding positive health for Torres Strait Islanders â a âwicked problemâ for which there is no straightforward solution.1 Proposed models for Torres Strait Islanderâdriven research and policy analysis are not new.2 Yet a coordinated model for achieving synergy of multidisciplinary teams and stakeholders for environment, health and wellbeing has remained elusive. Partnerships between researchers and communities are typically limited by project scope and funding duration. Research capacityâbuilding efforts have focused on individual researchers. This has successfully produced a new generation of Torres Strait Islander researchers across disciplines, including Meriba buayângalpan wakaythoemamy (also known as the Torres Strait Islander Researchersâ Community of Practice or CoP). However, support for local community organisations to drive their own longâterm research agenda is found wanting. Given Torres Strait Islandersâ previous and current calls for autonomy, the community itself is best positioned to determine key priorities and to understand the context for decision making.3-5 How can Torres Strait Islander communities leverage research that properly informs decisionâmaking and action towards positive health and wellbeing
- âŚ