1,659 research outputs found
Spin dynamics in the topological elemental gray Tin from first principles perspective
No full textGray Tin is attracting much more interest as a topological quantum material,
which has a precisely controlled composition and can be a material for
spintronic devices. However, the spin dynamics in gray Tin is largely unknown.
In this paper, we calculate the topological surface state of gray Tin by
combining density functional theory and a tight-bind model, also propose an
electromagnetics -- quantum mechanics hybrid approach on how to enhance with
metastructures the spin polarized photocurrent in gray Tin, which was
experimentally measured recently.Comment: My previous management did not to publish this article in arXiv.org.
I have obligation to withdraw it from arXiv.org. arXiv admin note: author
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Naming Authority and Clustering Using Author Names from UVa CS Department's Technical Report Collection
No full textWe examined naming authority and author name clustering in academic works. Specifically, we focused on a collection of reports from the University of Virginia’s Computer Science Department. Our research yielded a test list of names and a resulting file that correctly groups names referring to the same author, to the best of our knowledg
Dielectric constant of gray Tin: A first-principles study
No full text-Sn (gray tin) is a group-IV, zero-gap semiconductor with potential
use in infrared detectors, necessitating a clear understanding of its
dielectric properties. We report the first-principles calculations of the band
structure and dielectric function of -Sn using density functional
theory, emphasizing the effects of strain, spin-orbit interaction, and
pseudo-potentials on the electronic and optical properties of -Sn in
the infrared region (photon energy 1eV). In -Sn, spin-orbit
coupling greatly influences the electronic band structure that leads to unusual
optical behavior. We explain an apparently anomalous absorption at 0.41
eV caused by interbank transitions within the valence band. Infrared
spectroscopic ellipsometry on several -Sn films grown by molecular beam
epitaxy validate our band-structure calculations. Our computational methods and
results are discussed in detail.Comment: My previous management did not to publish this article in arXiv.org.
I have obligation to withdraw it from arXiv.org. arXiv admin note: author
list truncate
The structure and the evolution of essential patents for standards: Lessons from three IT standards
No full textThis paper examines the structure and the evolution of the patents declared as essential for three major technical standards in information technology (MPEG2, DVD and W-CDMA). These standards have many essential patents, which are owned by many firms with different interests. Many patents have been applied even after the standard was set. We analyze three important reasons for why the essential patents are many and increase over time: they cover a number of different technology fields, there exist R&D competition even in a narrowly defined technology field and a firm can expand its patent portfolio by using continuations and other practices based on the priority dates of its earlier filed patent applications in the USA. Around 40% of the essential US patents for MPEG2 and DVD standards have been obtained by using these applications. However, our empirical analysis suggests that a firm with pioneering patents does not obtain more essential patents, using these practices.standard, essential patent, continuations
Design and implementation of Click Admin --- a web-based network research platform
No full textThis thesis describes the design and implementation of Click Admin, a web-based network research platform. Click Admin was designed to be a robust tool for network administrators to be able to research how people would prefer to use their network when presented with different scenarios, e.g., different queueing types, different queueing priorities, individual bandwidth allocation, offered incentives for cooperative users, etc. The main goals of Click Admin are to allow network administrators to (1) gather data on how their users would prefer to use the network in any given scenario, (2) configure the flow of traffic to simulate the given scenario, and (3) monitor and analyze how users actually use the network in the given scenario. At it's core, Click Admin is merely an interface to Click Modular Router, which is a flexible, yet fast modular router toolkit allowing network administrators to reroute traffic in any number of ways. The research capabilities of Click Admin come in the form of a survey system that network administrators can use to design unique experiments and present different scenarios to users, asking them to specify how they would prefer to use the network in each scenario. After determining how each user would prefer to use the network, the Click Modular Router is then dynamically configured to simulate the given scenario. During each simulation, basic network analysis tools are used to capture the flow of traffic, for the purpose of monitoring and analyzing how users actually use the network in each scenario. With these tools, network administrators can gain insight not only into how users use the network, but how they would prefer to use the network in any number of different real-world scenarios, and can possibly even predict future trends in network usage and improve network performance.M.S.Includes bibliographical referencesby Abdul Hassa
Remarks on quasilocal mass and fill-ins
No full textIn this paper we would have a brief overview of several proposals of
quasilocal mass which are based on Hamiltonian formulation. We also show the
positivity of the Wang-Yau energy under a more general condition. We then
further study the quasilocal mass and DEC fill-ins defined by the author in
terms of completeness and shields.Comment: 17 pages, comments are welcome. arXiv admin note: text overlap with
arXiv:2109.1107
Life Admin When Life Turns Upside Down: A Book Review (Of Sorts)
No full textProf. Elizabeth Emens is a law professor, a parent, and the author of Life Admin: How I Learned to Do Less, Do Better, and Live More - a book published in 2019. Life Admin made its way into our stack of “life improvement to-reads” (not to be confused with our stack of educational pedagogy to-reads, our parenting to-reads, our for-enjoyment to-reads, our legal education to-reads, or our political and non-fiction to-reads). As we face luxurious 10-30 minutes between Zoom classes, Zoom faculty meetings, Zoom student counseling, and Zoom parent-teacher council, we wondered in the context of a COVID Cares academic symposium: what might Life Admin have to teach us, here and now, in the midst of this chaos? This book review is generous and practical. Prof. Emens did not intend her advice to be delivered during a pandemic, but we suspect the challenges we and our caretaker colleagues in academia face right now are not new—they are simply exacerbated by the challenges of 2020. This review of Life Admin distils the book down to its most basic themes relevant to us “Super Doer” lawyer and professor types who juggle the constant mental load of service, teaching, scholarship, and parenting demands. It brings comfort in numbers and shared experience, we hope, and some tips for readers who have never been more overwhelmed by the admin of life than right now
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