1,998 research outputs found
Phase formation and thermal stability of ultrathin nickel-silicides on Si(100)
The solid-state reaction and agglomeration of thin nickel-silicide films was investigated from sputter deposited nickel films (1-10 nm) on silicon-on-insulator (100) substrates. For typical anneals at a ramp rate of 3 degrees C/s, 5-10 nm Ni films react with silicon and form NiSi, which agglomerates at 550-650 degrees C, whereas films with a thickness of 3.7 nm of less were found to form an epitaxylike nickel-silicide layer. The resulting films show an increased thermal stability with a low electrical resistivity up to 800 degrees C
Telling the Soviet redemption story: Ronald Reagan’s changing Soviet rhetoric
This dissertation examines Ronald Reagan’s changing Soviet rhetoric over the course of his presidency. Specifically, I argue that through the rhetorical analysis of eight of Reagan’s speeches, four from his first term and four from his second, we see how the President told a story of Soviet redemption. The first chapter of this extended rhetorical analysis is a justification of my claim, or a discussion of why Reagan’s Soviet rhetoric matters. The chapter also stands as a Cold War literature review that reveals how America understood itself as the world’s guardian against communist encroachment. The second chapter is concerned with Reagan’s pre-presidential Soviet rhetoric from his position as the Screen Actors Guild president through his failed presidential campaign run in 1976, and it establishes the decades-long pattern of anti-communist vitriol that Reagan brought to the White House. The third chapter is a rhetorical study of the Reagan’s concretized Soviet rhetoric that focuses on his use of historical narrative, characterizing the Soviet Union’s leaders as immoral and abhorrent, and the rhetoric of the Soviet Union’s inevitable fall. The fourth chapter examines how Reagan negotiated the shift from his antecedent Soviet rhetoric to a more conciliatory Soviet rhetoric, effectively recasting the USSR as a flawed but possibly redemptive character. The final chapter specifically looks at how Reagan’s Soviet redemption narrative emerged from his eight years as President of the United States and how that narrative might better help us understand Reagan as an orator
Some identities on derangement and degenerate derangement polynomials
In combinatorics, a derangement is a permutation that has no fixed points.
The number of derangements of an n-element set is called the n-th derangement
number. In this paper, as natural companions to derangement numbers and
degenerate versions of the companions we introduce derangement polynomials and
degenerate derangement polynomials. We give some of their properties,
recurrence relations and identities for those polynomials which are related to
some special numbers and polynomials.Comment: 12 page
Broadband quadrature-squeezed vacuum and nonclassical photon number correlations from a nanophotonic device
We report the first demonstrations of both quadrature squeezed vacuum and
photon number difference squeezing generated in an integrated nanophotonic
device. Squeezed light is generated via strongly driven spontaneous four-wave
mixing below threshold in silicon nitride microring resonators. The generated
light is characterized with both homodyne detection and direct measurements of
photon statistics using photon number-resolving transition edge sensors. We
measure ~dB of broadband quadrature squeezing (~dB inferred
on-chip) and ~dB of photon number difference squeezing (~dB
inferred on-chip). Nearly-single temporal mode operation is achieved, with raw
unheralded second-order correlations as high as measured
(~when corrected for noise). Multi-photon events of over 10 photons
are directly detected with rates exceeding any previous quantum optical
demonstration using integrated nanophotonics. These results will have an
enabling impact on scaling continuous variable quantum technology.Comment: Significant improvements and updates to photon number squeezing
results and discussions, including results on single temporal mode operatio
Optical one-way quantum computing with a simulated valence-bond solid
One-way quantum computation proceeds by sequentially measuring individual
spins (qubits) in an entangled many-spin resource state. It remains a
challenge, however, to efficiently produce such resource states. Is it possible
to reduce the task of generating these states to simply cooling a quantum
many-body system to its ground state? Cluster states, the canonical resource
for one-way quantum computing, do not naturally occur as ground states of
physical systems. This led to a significant effort to identify alternative
resource states that appear as ground states in spin lattices. An appealing
candidate is a valence-bond-solid state described by Affleck, Kennedy, Lieb,
and Tasaki (AKLT). It is the unique, gapped ground state for a two-body
Hamiltonian on a spin-1 chain, and can be used as a resource for one-way
quantum computing. Here, we experimentally generate a photonic AKLT state and
use it to implement single-qubit quantum logic gates.Comment: 11 pages, 4 figures, 8 tables - added one referenc
Linking functional with personal income distribution: a stock-flow consistent approach
© 2015 Taylor & Francis. This paper develops a benchmark stock-flow consistent model that links functional with personal income distribution. The model consists of various household groups that receive income from different sources or from the same sources in different proportions. The dynamic linkage between functional and personal income distribution is formulated as part of a complete macroeconomic system. Inequality decomposition techniques are employed to associate income sources with personal income distribution. Simulation exercises are conducted to reveal the various ways through which functional and personal income distribution interact. In the simulations, a rise in the exogenous component of low-skilled workers’ wage share reduces inequality in the short run; in the medium to long run inequality starts increasing due to certain macroeconomic developments, but remains lower than its initial level in almost all cases. A change in functional income distribution due to a rise in the dividend payout ratio of firms increases inequality both in the short run and the long run
- …