1,610,792 research outputs found
Recombination-enhanced processes in solar cell degradation
In this paper we briefly survey processes enhanced by high carrier densities and cases relevant to solar cell systems. The criteria for distinguishing between the main types of mechanism (local excitation, local heating and the Bourgoin-Corbett mechanism) are discussed. Whether or not the reaction coordinate is a normal mode proves to be of considerable importance
Combining behavioural types with security analysis
Today's software systems are highly distributed and interconnected, and they
increasingly rely on communication to achieve their goals; due to their
societal importance, security and trustworthiness are crucial aspects for the
correctness of these systems. Behavioural types, which extend data types by
describing also the structured behaviour of programs, are a widely studied
approach to the enforcement of correctness properties in communicating systems.
This paper offers a unified overview of proposals based on behavioural types
which are aimed at the analysis of security properties
Foams with enhanced ductility and impact behavior based on polypropylene composites
Producción CientíficaIn this work, formulations based on composites of a linear polypropylene (L-PP), a long-chain branched polypropylene (LCB-PP), a polypropylene–graft–maleic anhydride (PP-MA), a styrene-ethylene-butylene-styrene copolymer (SEBS), glass fibers (GF), and halloysite nanotubes (HNT-QM) have been foamed by using the improved compression molding route (ICM), obtaining relative densities of about 0.62. The combination of the inclusion of elastomer and rigid phases with the use of the LCB-PP led to foams with a better cellular structure, an improved ductility, and considerable values of the elastic modulus. Consequently, the produced foams presented simultaneously an excellent impact performance and a high stiffness with respect to their corresponding solid counterparts.Unión Europea (Evolution project under grant 314744)Ministerio de Ciencia, Innovación y Universidades - Fondo Europeo de Desarrollo Regional (project RTI2018-098749-B-I00)Junta de Castilla y Leon (project VA275P18
3D microwave cavity with magnetic flux control and enhanced quality factor
Three-dimensional (3D) superconducting microwave cavities with large mode
volumes typically have high quality factors (). This is due to a reduced
sensitivity to surface dielectric losses, which is the limiting source of
dissipation in two-dimensional transmission line resonators. In recent years,
3D microwave cavities have been extensively used for coupling and interacting
with superconducting quantum bits (qubits), providing a versatile platform for
quantum information processing and hybrid quantum systems. A current issue that
has arisen is that 3D superconducting cavities do not permit magnetic field
control of qubits embedded in these cavities. In contrast, microwave cavities
made of normal metals can be transparent to magnetic fields, but experience a
much lower quality factor (), which negates many of the advantages
of the 3D architecture. In an attempt to create a device that bridges a gap
between these two types of cavities, having magnetic field control and high
quality factor, we have created a hybrid 3D cavity. This new cavity is
primarily composed of aluminium but also contains a small copper insert. We
measured the internal quality factor of the hybrid cavity to be , which
is an order of magnitude improvement over all previously tested copper
cavities. An added benefit to that our hybrid cavity possesses is that it also
provides an improved thermal link to the sample that superconducting cavities
alone cannot provide. In order to demonstrate precise magnetic control within
the cavity, we performed spectroscopy of three superconducting qubits placed in
the cavity, where individual control of each qubit's frequency was exerted with
small wire coils attached to the cavity. A large improvement in quality factor
and magnetic field control makes this 3D hybrid cavity an attractive new
platform for circuit quantum electrodynamics experiments.Comment: 5 pages, 2 figure
Enhanced Campus Life Executive Summary
The Enhanced Campus Life Working Group was formed by President Armstrong who identified an opportunity to create a culture for 24/7 campus life that meets the academic and social needs of the students, whether living on or off campus. Emerging as the largest residential program in the California State University System, Cal Poly is poised to create a dynamic and innovative educational platform that serves the university community on a 24/7 basis
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