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Worked perfectly - well, maybe not the magnets in the pens
This is exactly what we needed for the kitchen. It does exactly what you'd expect, and the price was right. The quality of the writing surface is good - it doesn't slip around on the fridge. The pens are just okay. The magnets are not so great, in fact, one jumped off the fridge and ran underneath in the first few days. I had bought a separate thing of pens, we wanted more color choices, and the magnets on those are fine - so I didnt mind. I'd buy this again if a similar need comes up
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Trumps war on the media is needed! The left leaning media is out to lunch! so blatantly publishing lies and fake news, that they need to be called out and finally there is someone in office willing to call them out for their BS.
Trump never ever was under investigation for Russian collusion, but if you followed the left leaning media, you'd think otherwise. It doesn't matter if you like Trump or not, that's not the point, the point is, is that we are intentionally misinformed by CNN and that needs to stop!
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Circadian clocks are oscillatory genetic networks that help organisms adapt
to the 24-hour day/night cycle. The clock of the green alga Ostreococcus tauri
is the simplest plant clock discovered so far. Its many advantages as an
experimental system facilitate the testing of computational predictions.
We present a model of the Ostreococcus clock in the stochastic process
algebra Bio-PEPA and exploit its mapping to different analysis techniques, such
as ordinary differential equations, stochastic simulation algorithms and
model-checking. The small number of molecules reported for this system tests
the limits of the continuous approximation underlying differential equations.
We investigate the difference between continuous-deterministic and
discrete-stochastic approaches. Stochastic simulation and model-checking allow
us to formulate new hypotheses on the system behaviour, such as the presence of
self-sustained oscillations in single cells under constant light conditions.
We investigate how to model the timing of dawn and dusk in the context of
model-checking, which we use to compute how the probability distributions of
key biochemical species change over time. These show that the relative
variation in expression level is smallest at the time of peak expression,
making peak time an optimal experimental phase marker. Building on these
analyses, we use approaches from evolutionary systems biology to investigate
how changes in the rate of mRNA degradation impacts the phase of a key protein
likely to affect fitness. We explore how robust this circadian clock is towards
such potential mutational changes in its underlying biochemistry. Our work
shows that multiple approaches lead to a more complete understanding of the
clock.
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We study linearized stability in first-order relativistic viscous
hydrodynamics in the most general frame. There is a region in the parameter
space of transport coefficients where the perturbations of the equilibrium
state are stable. This defines a class of stable frames, with the
Landau-Lifshitz frame falling outside the class. The existence of stable frames
suggests that viscous relativistic fluids may admit a sensible hydrodynamic
description in terms of temperature, fluid velocity, and the chemical potential
only, i.e. in terms of the same hydrodynamic variables as non-relativistic
fluids. Alternatively, it suggests that the Israel-Stewart and similar
constructions may be unnecessary for a sensible relativistic hydrodynamic
theory.
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This is a nice solid camera with useful features
This is a nice solid camera with useful features. It looks nice and doesn’t immediately stand out as a camera, which makes it inconspicuous. I managed to get it to work with Echo Spot, but it took a few tries and restarts to get it to work, but it’s been fine since. I also have another EZVIZ camera that works well and I can see both cameras. I’ll probably buy a few more of these, provided these last a while.
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We report on a mid-infrared mode-locked fiber laser that uses an
acousto-optic tunable filter to achieve frequency-shifted feedback pulse
generation with frequency tuning over a 215 nm range. The laser operates on the
3.5 ${\mu}$m transition in erbium-doped zirconium fluoride-based fiber and
utilizes the dual-wavelength pumping scheme. Stable, self-starting mode-locking
with a minimum pulse duration of 53 ps was measured using a two-photon
absorption autocorrelator. The longest wavelength demonstrated was 3612 nm and
a maximum average power of 208 mW was achieved. This is the longest wavelength
rare-earth doped mode-locked fiber laser demonstrated to the best of the
authors' knowledge. The broad tunability promises potential uses for
environmental sensing applications.
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I saw this film at Telluride Film Festival in 1997, where one of the screenwriters, José Giovanni, was being honored. It ranks highly as a great noir-crime-drama, incredible performances by Belmondo and Lino Ventura. The attention given to every character, and complex psychological portrayals, detailing loyalty, treachery, love, and hope, are tremendous. It is an excellent drama, an excellent thriller, and an excellent film. Up there with the best of Melville. (The title in English 'Class all risk,' in French 'Classe tous risques' is word-play on 'Classe Touriste,' meaning 'Tourist Class'.
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Highly supercritical accretion discs are probable sources of dense optically
thick axisymmetric winds. We introduce a new approach based on diffusion
approximation radiative transfer in a funnel geometry and obtain an analytical
solution for the energy density distribution inside the wind assuming that all
the mass, momentum and energy are injected well inside the spherization radius.
This allows to derive the spectrum of emergent emission for various inclination
angles. We show that self-irradiation effects play an important role altering
the temperature of the outcoming radiation by about 20% and the apparent X-ray
luminosity by a factor of 2-3. The model has been successfully applied to two
ULXs. The basic properties of the high ionization HII-regions found around some
ULXs are also easily reproduced in our assumptions.
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So-called collaborative robots are a current trend in industrial robotics.
However, they still face many problems in practical application such as reduced
speed to ascertain their collaborativeness. The standards prescribe two
regimes: (i) speed and separation monitoring and (ii) power and force limiting,
where the former requires reliable estimation of distances between the robot
and human body parts and the latter imposes constraints on the energy absorbed
during collisions prior to robot stopping. Following the standards, we deploy
the two collaborative regimes in a single application and study the performance
in a mock collaborative task under the individual regimes, including
transitions between them. Additionally, we compare the performance under
"safety zone monitoring" with keypoint pair-wise separation distance assessment
relying on an RGB-D sensor and skeleton extraction algorithm to track human
body parts in the workspace. Best performance has been achieved in the
following setting: robot operates at full speed until a distance threshold
between any robot and human body part is crossed; then, reduced robot speed per
power and force limiting is triggered. Robot is halted only when the operator's
head crosses a predefined distance from selected robot parts. We demonstrate
our methodology on a setup combining a KUKA LBR iiwa robot, Intel RealSense
RGB-D sensor and OpenPose for human pose estimation.
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We develop a new method for regularising neural networks. We learn a
probability distribution over the activations of all layers of the model and
then insert imputed values into the network during training. We obtain a
posterior for an arbitrary subset of activations conditioned on the remainder.
This is a generalisation of data augmentation to the hidden layers of a
network, and a form of data-aware dropout. We demonstrate that our training
method leads to higher test accuracy and lower test-set cross-entropy for
neural networks trained on CIFAR-10 and SVHN compared to standard
regularisation baselines: our approach leads to networks with better calibrated
uncertainty over the class posteriors all the while delivering greater test-set
accuracy.
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Using the simulation data coming from the cascade model, we have studied the
behavior of event number as a function of impact parameter-b and a number of
all charged particles- Nch for light and heavy nuclei at different energies. We
have seen that for light nuclei, a number of all charged particles-Nch could be
used to fix the centrality. But for heavy nuclei we have got strong initial
energy and mass dependences and the results for impact parameter factor
dependences and ones for a number of all charged particles differ. So for heavy
nuclei, a number of charged particles-Nch could not be use to fix the
centrality. Key words: cascade model; centrality, light nuclei, heavy nuclei
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We investigate theoretically the effects of the Coulomb interaction and
spin-orbit interactions (SOIs) on the anisotropic transport property of
semiconductor quantum wires embedded in (110) plane. The anisotropy of the dc
conductivity can be enhanced significantly by the Coulomb interaction for
infinite-long quantum wires. But it is smeared out in quantum wires with finite
length, while the ac conductivity still shows anisotropic behavior, from which
one can detect and distinguish the strengths of the Rashba SOI and Dresselhaus
SOI.
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Beauty production in deep inelastic scattering with events in which a muon
and a jet are observed in the final state has been measured with the ZEUS
detector at HERA using an integrated luminosity of 114 pb^-1. The fraction of
events with beauty quarks in the data was determined using the distribution of
the transverse momentum of the muon relative to the jet. The cross section for
beauty production was measured in the kinematic range of photon virtuality, Q^2
> 2 Gev^2, and inelasticity, 0.05 < y < 0.7, with the requirement of a muon and
a jet. Total and differential cross sections are presented and compared to QCD
predictions. The beauty contribution to the structure function F_2 was
extracted and is compared to theoretical predictions.
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Netflix should mention this short feature on the info for Silk Stockings. Superior in every way to that over-produced fluff. This had much better Cole Porter songs and lots more energy. Silk Stockings turned out to be a big disappointment. Fred was getting too old for this sort of thing, though the dances and Cyd are lovely. I will be on the watch for the Garbo--Melvyn Douglas version of Ninotchka. Was Peter Lorre ill during the making of Silk Stockings--he seems to be very passive in the more active numbers and with less lines? Very glad that I ran across Paree--Paree by pure accident. Made the whole experience a lot more enjoyable. Bob Hope, as a simple "song and dance man' is pure joy.
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In this paper we present a novel filter, based on the existing COSFIRE
filter, for the delineation of patterns of interest. It includes a mechanism of
push-pull inhibition that improves robustness to noise in terms of spurious
texture. Push-pull inhibition is a phenomenon that is observed in neurons in
area V1 of the visual cortex, which suppresses the response of certain simple
cells for stimuli of preferred orientation but of non-preferred contrast. This
type of inhibition allows for sharper detection of the patterns of interest and
improves the quality of delineation especially in images with spurious texture.
We performed experiments on images from different applications, namely the
detection of rose stems for automatic gardening, the delineation of cracks in
pavements and road surfaces, and the segmentation of blood vessels in retinal
images. Push-pull inhibition helped to improve results considerably in all
applications.
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Discrimination of coherent states beyond the standard quantum limit (SQL) is
an important tasknot only for quantum information processing but also for
optical coherent communication. In orderto optimize long distance optical fiber
networks, it is of practical importance to develop a quantumreceiver beating
the SQL and approaching the quantum bound at telecom wavelength. In this
paper,we experimentally demonstrate a receiver beating the conventional SQL at
telecom wavelength. Ourreceiver is composed of a displacement operation, a
single photon counter and a real time adaptivefeedback operation. By using a
high performance single photon detector operating at the telecomwavelength, we
achieve a discrimination error beyond the SQL. The demonstration in the
telecomband provides the first step important towards quantum and classical
communication beyond theSQL using a coherent state alphabet, and we envision
that the technology can be used for long-distance quantum key distribution,
effective quantum state preparation and quantum estimation.
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Disappointed.
These gloves are really warm and I loved how they looked at first! I had to cut threads off of them and then they were okay for one or two wears. This is a photo of the gloves when I took them out of the package. Threads everywhere! They also do NOT work with my iPhone. So the “touch screen” thing should not be included in the title. The third time I wore them the fuzzy balls fell off of them so now they’re just plain black gloves with a touch of fur. Pretty disappointed. But they still keep my hands warm 😑 so I’ll use them.
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We present an analysis of a 50 orbit HST ACS observation of the M87 globular
cluster system. We use the extraordinary depth of this dataset to test whether
the colors and magnitudes show evidence for a mass-metallicity relation in
globular cluster populations. We find only a weak or absent relation between
the colors and magnitudes of the metal poor subpopulation of globular clusters.
The weakness or absence of a color-magnitude relation is established over a
wide range in luminosity from $M_V=-11$ to $M_V=-6$, encompassing most of the
M87 globular clusters. The constancy of the colors of the metal-poor
subpopulation seen in our 50 orbit observation is in contrast to suggestions
from single orbit ACS data that the metal-poor globular clusters in M87 and
several other galaxies show a "blue tilt." The formal best fit for the
mass-metallicity relation for the metal-poor subpopulation in our much deeper
data is $Z\propto M^{0.08\pm0.05}$. Our analysis of these data also shows a
possible small "red tilt" in the metal-rich globular cluster subpopulation.
While either of these small tilts may be real, they may also illustrate the
limit to which mass-metallicity relations can be determined, even in such
extraordinarily deep data. We specifically test for a wide range of systematic
effects and find that while small tilts cannot be confirmed or rejected, the
data place a strong upper limit to any tilt of $|0.20|\pm0.05$. This upper
limit is much smaller than some earlier claims from single orbit data, and
strongly limits self-enrichment within globular clusters. This mass-metallicity
relation for globular clusters is also shallower than the relation for
galaxies, suggesting that the formation mechanisms for these two types of
objects are different.
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Three-dimensional MEMS magnetometers with use of residual stresses in thin
multilayers cantilevers are presented. Half-loop cantilevers based on
Lorentz-force deflection convert magnetic flux in changes, thanks to
piezoresistive transducers mounted in Wheatstone bridge. Magnetic field in the
order of 10 Gauss was measured with a sensitivity of 0.015 mV/Gauss. A Finite
Element Model of the device has been developed with Ansys for static and
dynamic simulations. Novel out-of-plane ferromagnetic nickel plate magnetometer
is also presented.
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The Fe isotope effect (Fe-IE) on the transition temperature T_c and the
crystal structure was studied in the Fe chalcogenide superconductor FeSe_1-x by
means of magnetization and neutron powder diffraction (NPD). The substitution
of natural Fe (containing \simeq 92% of ^{56}Fe) by its lighter ^{54}Fe isotope
leads to a shift of T_c of 0.22(5)K corresponding to an Fe-IE exponent of
\alpha_Fe=0.81(15). Simultaneously, a small structural change with isotope
substitution is observed by NDP which may contribute to the total Fe isotope
shift of T_c.
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I as only one out of tens of thousands do NOT support their buying that monstrosity of opulent corruption when they are forcing the rest of the state to make deep deep cuts that is now and will permanently affect the state agencies negatively in keeping the state running.
The legislators do NOT make the show run.......it is the individual agencies that keep it going. The legislators only throw wrenches into everything make things worse every year.
They obtained that upgrade to that building and the lease in a corrupted, illegal and underhanded way. They deserve to be booted out on their rear ends ........without their automatic motion detecting trash can to do you know what in .
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A single social phenomenon (such as crime, unemployment or birth rate) can be
observed through temporal series corresponding to units at different levels
(cities, regions, countries...). Units at a given local level may follow a
collective trend imposed by external conditions, but also may display
fluctuations of purely local origin. The local behavior is usually computed as
the difference between the local data and a global average (e.g. a national
average), a view point which can be very misleading. We propose here a method
for separating the local dynamics from the global trend in a collection of
correlated time series. We take an independent component analysis approach in
which we do not assume a small unbiased local contribution in contrast with
previously proposed methods. We first test our method on synthetic series
generated by correlated random walkers. We then consider crime rate series (in
the US and France) and the evolution of obesity rate in the US, which are two
important examples of societal measures. For crime rates, the separation
between global and local policies is a major subject of debate. For the US, we
observe large fluctuations in the transition period of mid-70's during which
crime rates increased significantly, whereas since the 80's, the state crime
rates are governed by external factors and the importance of local
specificities being decreasing. In the case of obesity, our method shows that
external factors dominate the evolution of obesity since 2000, and that
different states can have different dynamical behavior even if their obesity
prevalence is similar.
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Nanoplasmonics has been used to enhance molecular spectroscopic signals, with
exquisite spatial resolution down to the sub-molecular scale. By means of a
rigorous, state-of-the-art multiscale model based on a quantum chemical
description, here we show that optimally tuned tip-shaped metal nanoparticles
can selectively excite localized regions of typically coherent systems,
eventually narrowing down to probing one single pigment. The well-known major
light-harvesting complex LH2 of purple bacteria has been investigated because
of its unique properties, as it presents both high and weak delocalization
among subclusters of pigments. This finding opens the way to the direct
spectroscopic investigation of quantum-based processes, such as the quantum
diffusion of the excitation among the chromophores, and their external
manipulation
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The shirt fits him in an XL the same way a M/L normally fits him and while the pictured shirt was enough to get my attention and make the purchase if it was pictured as well as it looks in person I honestly wouldn't mind spending an additional $5 or so.
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We calculate the double charmonium production cross section within the
framework of $4\times 4$ Bethe-Salpeter Equation in the electron-positron
annihilation, at center of mass energy $\sqrt{s}= 10.6$GeV, that proceeds
through the exchange of a single virtual photon. In this calculation, we make
use of the full Dirac structure of 4D BS wave functions of these charmonia,
with the incorporation of all the Dirac covariants (both leading and
sub-leading). The calculated cross-sections for the double charmonium
productions for final states, ($J/\Psi, \eta_c$); ($\Psi',\eta_c$) ; ($J/\Psi,
\eta_c'$); and ($\Psi',\eta_c'$) are close to experimental data, and in broad
agreement with results of other theoretical models.
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Multi-block grids provide the computational efficiency of structured grids
and the flexibility for complex geometry. Thus, Multi-block structured grids
are widely used for field simulation on complex domains. In this paper we
propose a method which adapts multi-block grids according to a monitor
function, which specifies cell volume distribution. The method is an extension
of the deformation method on a single block to multi-blocks.
Key words: multi-block grids, deformation method, adaptive grids
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For many months I was looking forward to this release. The previews looked good, early reports on the net were encouraging, and golden eye and Timesplitters were excellent shooters (by the same people). It turns out I was greatly misled! Haze had the potential to be up there with Call of Duty 4 and other next gen shooters, however it looks, plays and feels like something from 5 years or so ago. I played Haze on a 1080 TV and was initially disappointed that the game's developers had limited the graphics to 720. The Haze universe lacks detail and atmosphere, the feeling of "they must have really rushed to finish this" is always there.<br /><br />The controls are sluggish and cumbersome, and i have yet to find an adjustment for x/y axis sensitivity . There are many parts of the single player game that are very dark (visually), to the point where you can't actually see where you are going. Why not add a torch function like in Halo? or even better, night vision? The use of the performance enhancing drug "nectar" is interesting, however just as you get used to it you switch sides and don't use it again! why bother? I could go on with many more Haze faults, but instead i'll just say Don't BOTHER! wait for killzone 2 or play call of duty 4 and try to unlock the gold AK!
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Two string links are equivalent up to $2n$-moves and link-homotopy if and
only if their all Milnor link-homotopy invariants are congruent modulo $n$.
Moreover, the set of the equivalence classes forms a finite group generated by
elements of order $n$. The classification induces that if two string links are
equivalent up to $2n$-moves for every $n>0$, then they are link-homotopic.
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The human immune system protects the human body against various pathogens
like e.g. biological viruses and bacteria. Artificial immune systems reuse the
architecture, organization, and workflows of the human immune system for
various problems in computer science. In the network security, the artificial
immune system is used to secure a network and its nodes against intrusions like
viruses, worms, and trojans. However, these approaches are far away from
production where they are academic proof-of-concept implementations or use only
a small part to protect against a certain intrusion. This article discusses the
required steps to bring artificial immune systems into production in the
network security domain. It furthermore figures out the challenges and provides
the description and results of the prototype of an artificial immune system,
which is SANA called.
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Scaling theory predicts complete localization in $d=2$ in quantum systems
belonging to orthogonal class (i.e. with time-reversal symmetry and
spin-rotation symmetry). The conductance $g$ behaves as $g \sim exp(-L/l)$ with
system size $L$ and localization length $l$ in the strong disorder limit.
However, classical systems can always have metallic states in which Ohm's law
shows a constant $g$ in $d=2$. We study a two-dimensional quantum percolation
model by controlling dephasing effects. The numerical investigation of $g$ aims
at simulating a quantum-to-classical percolation evolution. An unexpected
metallic phase, where $g$ increases with $L$, generates immense interest before
the system becomes completely classical. Furthermore, the analysis of the
scaling plot of $g$ indicates a metal-insulator crossover.
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With the recent successes of neural networks (NN) to perform machine-learning
tasks, photonic-based NN designs may enable high throughput and low power
neuromorphic compute paradigms since they bypass the parasitic charging of
capacitive wires. Thus, engineering data-information processors capable of
executing NN algorithms with high efficiency is of major importance for
applications ranging from pattern recognition to classification. Our hypothesis
is therefore, that if the time-limiting electro-optic conversion of current
photonic NN designs could be postponed until the very end of the network, then
the execution time of the photonic algorithm is simple the delay of the
time-of-flight of photons through the NN, which is on the order of picoseconds
for integrated photonics. Exploring such all-optical NN, in this work we
discuss two independent approaches of implementing the optical perceptrons
nonlinear activation function based on nanophotonic structures exhibiting i)
induced transparency and ii) reverse saturated absorption. Our results show
that the all-optical nonlinearity provides about 3 and 7 dB extinction ratio
for the two systems considered, respectively, and classification accuracies of
an exemplary MNIST task of 97% and near 100% are found, which rivals that of
software based trained NNs, yet with ignored noise in the network. Together
with a developed concept for an all-optical perceptron, these findings point to
the possibility of realizing pure photonic NNs with potentially unmatched
throughput and even energy consumption for next generation information
processing hardware.
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We analyse the spectral energy distribution of the evolved carbon giant DY
Per with a spectral synthesis technique. The red giant shows the photometric
features of R CrB type stars. We derive the atmospheric parameters of DY Per
using three variants of molecular line lists. We estimate Teff to be in the
range 2900 < Teff < 3300 K. We adopted log g = 0. The star may be metal
deficient and hydrogen deficient. The maximum possible carbon abundance in the
star, [C]=0.94, provides the following atmospheric parameters: Tef=3100 K,
[Fe/H] = 0, log(C/O)=0.6, [N/Fe] = 0, [H/He] = 0, with Jorgensen's line lists
for the molecules C2 and CN.
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The physics of manganites is often described within an effective two-band
tight-binding (TB) model for the Mn e_g electrons, which apart from the kinetic
energy includes also a local "Hund's rule" coupling to the t_{2g} core spin and
a local coupling to the Jahn-Teller (JT) distortion of the oxygen octahedra. We
test the validity of this model by comparing the energy dispersion calculated
for the TB model with the full Kohn-Sham band-structure calculated within the
local spin-density approximation (LSDA) to density functional theory. We
analyze the effect of magnetic order, JT distortions, and "GdFeO_3-type"
tilt-rotations of the oxygen octahedra. We show that the hopping amplitudes are
independent of magnetic order and JT distortions, and that both effects can be
described with a consistent set of model parameters if hopping between both
nearest and next-nearest neighbors is taken into account. We determine a full
set of model parameters from the density functional theory calculations, and we
show that both JT distortions and Hund's rule coupling are required to obtain
an insulating ground state within LSDA. Furthermore, our calculations show that
the "GdFeO_3-type" rotations of the oxygen octahedra lead to a substantial
reduction of the hopping amplitudes but to no significant deviation from the
simple TB model.
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Two-parameter perturbation theory is a scheme tailor-made to consistently
include nonlinear density contrasts on small scales ($<100\; \mathrm{Mpc}$),
whilst retaining a traditional approach to cosmological perturbations in the
long-wavelength universe. In this paper we study the solutions that arise from
this theory in a spatially-flat dust-filled cosmology, and what these imply for
the bispectrum of matter. This is achieved by using Newtonian perturbation
theory to model the gravitational fields of nonlinear structures in the
quasi-linear regime, and then using the resulting solutions as source terms for
the cosmological equations. We find that our approach results in the
leading-order part of the cosmological gravitational potentials being identical
to those that result from standard cosmological perturbation theory at
second-order, while the dark matter bispectrum itself yields some differences
on Hubble scales. This demonstrates that our approach is sufficient to capture
most leading-order relativistic effects, but within a framework that is far
easier to generalize. We expect this latter property to be particularly useful
for calculating leading-order relativistic corrections to the matter power
spectrum, as well as for deriving predictions for relativistic effects in
alternative theories of gravity.
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Don't B Fooled - don't be. You have no idea who I am or what my lifestyle is like; you're just trotting out the usual stereotypical line against someone you perceive as an ideological opponent.
Calling people hypocrites, threatening and belittling them - how's that workin' for ya?
I'm an Albertan, I'm for some pipelines (trans mountain anyway) but certainly have no time for industry tough guys. You need to not just yell at us, you need to assure people, with some level of sincerity, you're concerned with the environment and going to clean up your inevitable mess.
Re, jobs - most sensible people know industry will hire as few people, for as little time and at as little wage as possible - jobs are not the big issue.
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The aim of this paper is to establish the existence and uniqueness of the
solution to a system of nonlinear fully coupled forward-backward doubly
stochastic differential equations with Poisson jumps. Our system is Markovian
in the sense that initial and terminal values depend on solutions, and are not
just fixed random variables. We establish under some monotonicity conditions,
the existence and uniqueness of strong solutions of such equations by using a
continuation method.
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We study the on-line minimum weighted bipartite matching problem in arbitrary
metric spaces. Here, $n$ not necessary disjoint points of a metric space $M$
are given, and are to be matched on-line with $n$ points of $M$ revealed one by
one. The cost of a matching is the sum of the distances of the matched points,
and the goal is to find or approximate its minimum. The competitive ratio of
the deterministic problem is known to be $\Theta(n)$. It was conjectured that a
randomized algorithm may perform better against an oblivious adversary, namely
with an expected competitive ratio $\Theta(\log n)$. We prove a slightly weaker
result by showing a $o(\log^3 n)$ upper bound on the expected competitive
ratio. As an application the same upper bound holds for the notoriously hard
fire station problem, where $M$ is the real line.
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There is extensive numerical support for the prime-pair conjecture (PPC) of
Hardy and Littlewood (1923) on the asymptotic behavior of pi_{2r}(x), the
number of prime pairs (p,p+2r) with p not exceeding x. However, it is still not
known whether there are infinitely many prime pairs with given even difference!
Using a strong hypothesis on (weighted) equidistribution of primes in
arithmetic progressions, Goldston, Pintz and Yildirim have shown (2007) that
there are infinitely many pairs of primes differing by at most sixteen. The
present author uses a Tauberian approach to derive that the PPC is equivalent
to specific boundary behavior of certain functions involving zeta's complex
zeros. Under Riemann's Hypothesis and on the real axis, these functions
resemble pair-correlation expressions. A speculative extension of Montgomery's
classical work (1973) would imply that there must be an abundance of prime
pairs.
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(Abridged) The Edgeworth-Kuiper belt with its presumed dusty debris is a
natural reference for extrsolar debris disks. We employ a new algorithm to
eliminate the inclination and the distance selection effects in the known TNO
populations to derive expected parameters of the "true" EKB. Its estimated mass
is M_EKB=0.12 M_earth, which is by a factor of \sim 15 larger than the mass of
the EKB objects detected so far. About a half of the total EKB mass is in
classical and resonant objects and another half is in scattered ones. Treating
the debiased populations of EKB objects as dust parent bodies, we then
"generate" their dust disk with our collisional code. Apart from accurate
handling of collisions and direct radiation pressure, we include the
Poynting-Robertson (P-R) drag, which cannot be ignored for the EKB dust disk.
Outside the classical EKB, the radial profile of the optical depth
approximately follows tau \sim r^-2 which is roughly intermediate between the
slope predicted analytically for collision-dominated (r^-1.5) and
transport-dominated (r^-2.5) disks. The cross section-dominating grain size
still lies just above the blowout size (\sim 1...2 \microm), as it would
without the P-R transport. However, if the EKB were by one order of magnitude
less massive, the optical depth profile would fall off as tau \sim r^-3, and
the cross section-dominating grain size would shift from \sim 1...2\microm to
~100 \microm. These properties are seen if dust is assumed to be generated only
by known TNOs. If the solar system were observed from outside, the thermal
emission flux from the EKB dust would be about two orders of magnitude lower
than for solar-type stars with the brightest known infrared excesses observed
from the same distance. Herschel and other new-generation facilities should
reveal extrasolar debris disks nearly as tenuous as the EKB disk. The
Herschel/PACS instrument should be able to detect disks at a \sim 1...2M_EKB
level.
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The search for elementary excitations with fractional quantum numbers is a
central challenge in modern condensed matter physics. We explore the
possibility in a realistic model for several materials, the spin-1/2 spatially
anisotropic frustrated Heisenberg antiferromagnet in two dimensions. By
restricting the Hilbert space to that expressed by exact eigenstates of the
Heisenberg chain, we derive an effective Schr\"odinger equation valid in the
weak interchain-coupling regime. The dynamical spin correlations from this
approach agree quantitatively with inelastic neutron measurements on the
triangular antiferromagnet Cs_2CuCl_4. The spectral features in such
antiferromagnets can be attributed to two types of excitations: descendents of
one-dimensional spinons of individual chains, and coherently propagating
"triplon" bound states of spinon pairs. We argue that triplons are generic
features of spatially anisotropic frustrated antiferromagnets, and arise
because the bound spinon pair lowers its kinetic energy by propagating between
chains.
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just what I was looking for.
Was super excited to find such a product. I use it to house my mouse as I go from meeting to meeting at work with my laptop. While it's a nifty product, the adhesive leaves something to be desired. I followed the directions for adhering it - using alcohol on the cover of my laptop and ensuring that I didn't touch the adhesive backing with my fingers. Despite this, the edge where the tab sticks up is peeling. I've removed the entire piece, washed it and tried the process again - no luck. Same edge peels. I'll keep it until it gets worse, but wouldn't buy it again.
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Quantum algorithms are sequences of abstract operations, performed on
non-existent computers. They are in obvious need of categorical semantics. We
present some steps in this direction, following earlier contributions of
Abramsky, Coecke and Selinger. In particular, we analyze function abstraction
in quantum computation, which turns out to characterize its classical
interfaces. Some quantum algorithms provide feasible solutions of important
hard problems, such as factoring and discrete log (which are the building
blocks of modern cryptography). It is of a great practical interest to
precisely characterize the computational resources needed to execute such
quantum algorithms. There are many ideas how to build a quantum computer. Can
we prove some necessary conditions? Categorical semantics help with such
questions. We show how to implement an important family of quantum algorithms
using just abelian groups and relations.
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In this paper, we investigate surfaces in singular semi-Euclidean space
$\mathbb{R}^{0,2,1}$ endowed with a degenerate metric. We define $d$-minimal
surfaces, and give a representation formula of Weierstrass type. Moreover, we
prove that $d$-minimal surfaces in $\mathbb{R}^{0,2,1}$ and spacelike flat zero
mean curvature (ZMC) surfaces in four-dimensional Minkowski space
$\mathbb{R}^{4}_{1}$ are in one-to-one correspondence.
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Visual deterrent only
It does it’s job. But I can see how if someone were really determined it wouldn’t take but a few seconds in a crowbar to get it off. But it’s a good visual deterrent. And with visible cameras on my building it’s sufficient for what I needed to do. But if I really was relying on that to keep someone from stealing my trailer, it wouldn’t do the job at all.
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In The Line of Fire gives us a great game of cat and mouse. Clint Eastwood is plagued by John Malkovich in this riveting film. Malkovich says he's going to kill the president, and he purposely calls Eastwood, and pushes his buttons. He questions Eastwood's ability to protect someone. Malkovich brings a cold, but very intelligent mindset to his character. Everything he does, he does for a reason, and he's not shy about killing. Eastwood has to overcome the suspicions of his superiors in order to catch Malkovich, but no one wants to listen to him. The result is a film that crackles with suspense that escalates to a tense scene in a ballroom at the Bonneventure Hotel. Wolfgang Peterson ratchets up the tension and we feel every turn.
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We consider the one-dimensional target search process that involves an
immobile target located at the origin and $N$ searchers performing independent
Brownian motions starting at the initial positions $\vec x = (x_1,x_2,...,
x_N)$ all on the positive half space. The process stops when the target is
first found by one of the searchers. We compute the probability distribution of
the maximum distance $m$ visited by the searchers till the stopping time and
show that it has a power law tail: $P_N(m|\vec x)\sim B_N (x_1x_2...
x_N)/m^{N+1}$ for large $m$. Thus all moments of $m$ up to the order $(N-1)$
are finite, while the higher moments diverge. The prefactor $B_N$ increases
with $N$ faster than exponentially. Our solution gives the exit probability of
a set of $N$ particles from a box $[0,L]$ through the left boundary.
Incidentally, it also provides an exact solution of the Laplace's equation in
an $N$-dimensional hypercube with some prescribed boundary conditions. The
analytical results are in excellent agreement with Monte Carlo simulations.
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You left out part of that: the first part. Google it. This statement is so obviously a joke that Snopes doesn't even direct any attention to it; the only ones who have are right-wing conspiracy sites.
Have you seen the Gieco commercial with the two guys in the basement, Don? It's funny.
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We present a series of arguments showing that the Seebeck coefficient can be
used as a decisive experiment to characterize the nature of the quantum
critical point (QCP) in heavy fermion compounds. Being reactive almost
exclusively to the presence of delocalized entropic carriers, the Seebeck
coefficient shows a drastic collapse at the Kondo breakdown QCP, as the
reconstruction of the Fermi surface takes place. In contrast, around a Spin
Density Wave (SDW) QCP, the Seebeck coefficient is broadly symmetric. We
discuss the possibility of a change of sign at the QCP, the characteristic
variation of $| S / T | $ with temperature and external parameter, as well as
the capacity of the Seebeck coefficient to distinguish between localized and
itinerant anti-ferromagnetism (AF). Suggestions of experiments are given in the
case of four non conventional compounds : YbRh$_2$Si$_2$, Ce(Mn)In$_5$,
CeCu$_{6-x}$Au$_x$ and URu$_2$Si$_2$.
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Tim (Gary Daniels) wants desperately to break into serious television reporting. When a job he begged for goes awry, he is fired. His beautiful but empty girlfriend (Elizabeth Hurley) says sayonara, too. Coming home, Tim is startled to discover his house has an uninvited visitor (Christopher Lloyd) from the planet Mars! Calling him Uncle Martin, Tim soon tries to help his new friend navigate life on earth. But, Martin gets in trouble wherever he goes, from the bathroom to the laundry room and more. Lovely Lizzie (Daryl Hannah) finally sees an opportunity to make time with Tim but the course of true love does not run smooth in this case, either. Soon everyone in television is stalking Tim, hoping for a story about a true alien. What's a man to do? For those who loved the old television show of the same name, with Bill Bixby and Ray Walston, this film is not worthy to tie the proverbial boots. Its truly, undeniably awful, with no plot and a reliance on supposed special effects which fall flat, too. Daniels is okay as the earthling but Lloyd is simply terrible as the alien, overacting up a storm. The rest of the cast is adequate, as are the costumes, set, and production details. Even if your children see the cover and beg for this film, convince them to pick out another flick at the video store. Be assured, kids and adults will find this movie a colossal bore, so opt for A Night at the Museum or Around the World in 80 Days instead.
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A fairly comprehensive analysis is presented for the gradient descent
dynamics for training two-layer neural network models in the situation when the
parameters in both layers are updated. General initialization schemes as well
as general regimes for the network width and training data size are considered.
In the over-parametrized regime, it is shown that gradient descent dynamics can
achieve zero training loss exponentially fast regardless of the quality of the
labels. In addition, it is proved that throughout the training process the
functions represented by the neural network model are uniformly close to that
of a kernel method. For general values of the network width and training data
size, sharp estimates of the generalization error is established for target
functions in the appropriate reproducing kernel Hilbert space.
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Matching pursuit, especially its orthogonal version (OMP) and variations, is
a greedy algorithm widely used in signal processing, compressed sensing, and
sparse modeling. Inspired by constrained sparse signal recovery, this paper
proposes a constrained matching pursuit algorithm and develops conditions for
exact support and vector recovery on constraint sets via this algorithm. We
show that exact recovery via constrained matching pursuit not only depends on a
measurement matrix but also critically relies on a constraint set. We thus
identify an important class of constraint sets, called coordinate projection
admissible set, or simply CP admissible sets; analytic and geometric properties
of these sets are established. We study exact vector recovery on convex, CP
admissible cones for a fixed support. We provide sufficient exact recovery
conditions for a general support as well as necessary and sufficient recovery
conditions when a support has small size. As a byproduct, we construct a
nontrivial counterexample to a renowned necessary condition of exact recovery
via the OMP for a support of size three. Moreover, using the properties of
convex CP admissible sets and convex optimization techniques, we establish
sufficient conditions for uniform exact recovery on convex CP admissible sets
in terms of the restricted isometry-like constant and the restricted
orthogonality-like constant.
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We study the fair allocation of a cake, which serves as a metaphor for a
divisible resource, under the requirement that each agent should receive a
contiguous piece of the cake. While it is known that no finite envy-free
algorithm exists in this setting, we exhibit efficient algorithms that produce
allocations with low envy among the agents. We then establish NP-hardness
results for various decision problems on the existence of envy-free
allocations, such as when we fix the ordering of the agents or constrain the
positions of certain cuts. In addition, we consider a discretized setting where
indivisible items lie on a line and show a number of hardness results extending
and strengthening those from prior work. Finally, we investigate connections
between approximate and exact envy-freeness, as well as between continuous and
discrete cake cutting.
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Two kinds of processes could occur during the flare decay phase: processes of
energy release or processes of energy relaxation. Quasi-periodic pulsations
(QPPs) of the broadband emission are a good tool for the verification of
mechanisms. We aim to study the processes during the decay phase of the X-class
solar flare SOL2014-03-29T17:48. The observations in X-ray, microwave, and
extreme ultraviolet (EUV) bands are exploited to study the fine temporal,
spatial, and spectral structures of the flare. The periods, amplitudes, and
phases of both the fluxes and physical parameters (emission measure,
temperature) are studied using standard methods of correlation, Fourier, and
wavelet analyses. It is found that the source of the QPPs is associated with
the uniform post-flare loop. The X-ray source is located at the top of the
arcade. QPPs with the similar characteristic time scales of $P\approx$ 74--80 s
are found in the X-ray (3--25 keV) and microwave (15.7 GHz) emissions. Besides,
QPPs with the same period are found in the time profiles of both the
temperature ($T_e$) and emission measure ($EM$). The QPPs in temperature and
the QPPs in emission measure demonstrate anti-phase behavior. The analysis
reveals the quasi-periodic process of energy relaxation, without any additional
source of energy during the decay phase. The periods of the QPPs are in a good
agreement with second harmonic of standing slow magneto-acoustic wave in the
arcade which could be triggered by a Moreton wave initiated by the flare in the
direct vicinity of the arcade.
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Poor quality. Not worth the money
I bought 2. One arrived broken, the other one had a patch job on the larger stone. Neither one had a book included. Poor quality. Not worth the money. I'm glad I ordered 2 because I took parts off the broken one and put on the patched one. Will not buy again or recommend to anyone.
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We investigate consequences of an ultraviolet fixed point in quantum gravity
for the cosmological constant. For this purpose we perform dimensional
reduction of a general dilatation symmetric effective action $\Gamma$ in
dimension $d>4$ to an effective four-dimensional theory of gravity with a
dilaton field. We find a stable flat phase in the space of extrema of $\Gamma$
which results in a vanishing four-dimensional cosmological constant $\Lambda$.
In order to understand the self-tuning mechanism leading to $\Lambda = 0$ we
discuss in detail the most general warped geometries with maximal
four-dimensional symmetry and $SO(d-4)$ isometry of internal space. While the
solutions of the $d$-dimensional field equations admit singular spaces with
arbitrary $\Lambda$, the extremum condition for $\Gamma$ imposes additional
restrictions which result in $\Lambda = 0$. In cosmology, the dilatation
symmetric fixed point may only be reached for asymptotic time $t \to \infty$.
At finite $t$ dilatation anomalies result in an effective potential and mass
for the pseudo-dilaton or cosmon and in dark energy.
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Fairly funny Jim Carrey vehicle that has him as a News reporter who temporarily gets the power of God and wrecks havoc. Carrey is back in familiar ground here and looks to be having a good time, and Jennifer Aniston as his put upon girlfriend is also charming and affecting. The story is predictible to the extreme but the cast (including Morgan Freeman as "God") is great and makes the film worth catching. GRADE: B
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I've been trying to remember the name of this movie for years (not consecutively, of course). I saw it at the local dollar theater when I was 11, and it was so atrocious I almost walked out; I think I didn't realize one was allowed to leave before the movie ended. Anyway, it stuck in my mind as just about the worst movie I saw growing up. I can finally give it the rating it deserves.<br /><br />1/10 (that was strangely satisfying)
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an Installation nightmare
I have used and installed many computers and printers.. This one by far was the worst, most absurd installation process. most printers have a "get started" page to guide you through.> this has a note to download a phone app and do it that way. even the sheet to remove all the packing tape is not clear. Now, after intall, I can print, but I cannot scan from my computer, or to my computer. All in all just VERY confusing and not user friendly set up.
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After completing the lackluster novel, Heart of Darkness, I moved on to watch the movie, which was a complete and absolute disappointment. At the onset, I expected that the movie would help put together the jigsaw puzzle of a book. However, even though I had read the novel, the movie still made no sense at all, so I can't imagine how lost I would be if I had skipped the book altogether. It seemed as though the writers picked out their favorite parts and put them in the movie, and left out anything that may assist the viewers in comprehending the meaningless plot. This dreadful movie made no sense at all, and I would strongly recommend against watching it, as it will do nothing more than leave you completely baffled and bewildered.
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Two-dimensional (2D) lattices composed exclusively of pentagons represent an
exceptional structure of materials correlated to the famous pentagonal tiling
problem in mathematics, but their $\pi$-conjugation and the related electronic
properties have never been reported. Here, we propose a tight-binding (TB)
model for a 2D Cairo pentagonal lattice and demonstrate that $p$-$d$
$\pi$-conjugation in the unique framework leads to intriguing properties, such
as an intrinsic direct band gap, ultra-high carrier mobility and even slant
Dirac cones. On the basis of first-principles calculations, we predict a
candidate material, 2D penta-NiP$_2$ monolayer, derivated from bulk NiP$_2$
crystal, to realize the predictions of the TB model. It has ultra-high carrier
mobility ($\sim$$10^5-10^6$ $cm^2V^{-1}s^{-1}$) comparable to that of graphene
and an intrinsic direct band gap of 0.818 eV, which are long desired for
high-speed electronic devices. The stability and possible synthetic routes of
penta-NiP$_2$ monolayer are also discussed.
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Worth every penny
From reading some of the reviews, I was skeptical. When you pull it from the box, it is light and mostly plastic. You see the made in China sticker and you think- this thing probably cost $2 to make and I just paid $40? I clamped it to the corner of a sturdy table outside. The clamp could have been engineered better. A regular c-clamp can work better. I cut the top off the carrots and ran one through. I was amazed. It worked excellent. It removes more skin than you would if you did it with a hand peeler, but it is 20 to 100 times faster. About one in 20 of the carrots I pealed were too large for the hole in the top. I would have given it 5 stars if the hole was 1/2 in larger. I hand pealed the top section so it would fit. I put down a 4' by 4' plastic sheet for the peelings to fall on. Using the plunger guide is a pain. With the tops cut flat, I was able to place the plunger in the middle of the carrot and plunge it through without the guide piece. If you need to peel many carrots, get one of these.
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It's not easy being king...er, his eminence. The Gotham Empire is a big, smug, indifferent. Cardinal first and God can find a lower place. The Roman Catholic Church has rested on its self-defined laurels and is now in decline almost everywhere. Cardinal Timothy Cardinal Michael Cardinal Dolan has mighty little pastoral expertise as a golden boy from seminary days on. He trades in horseplay, jocularity and goofing around. He comes across as a lightweight with past papal patrons, but not much now. He's days shy of 67, so he has a long way to go.
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A novel recovery of some important documents related to the Fermi course on
neutron physics, held at Los Alamos in 1945, is announced. Its relevance for
the effective launch of a British nuclear programme in the early postwar
period, independently of the U.S. technical cooperation (precluded by the
American authorities) and warmly supported by Chadwick, is discussed.
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In the present paper we study symmetries of extended $K(m,n,p)$ equation $$
u_t=a(u^p)_{xxxxx}+b(u^n)_{xxx} + c(u^m)_{x} + f(u), $$ where $a,b,c$ are
arbitrary real constants and $m,n,p$ are arbitrary integers, and prove that for
$a\neq 0$ and $p\neq 1,-4$ this equation has no generalized symmetries of order
greater than five and hence is not symmetry integrable.
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The banter and humorous rescue scene help to make this one of my favorites of the 14-movie series. Wonderful acting, great cast. And this movie contains one of the few oft-noted facts about Sean Bean's career. The part where he and Alice Krige fall off the horse into the water was not scripted but was left in since they both went right on acting after it happened.<br /><br />This is a good follow-up to the intense ending of Sharpe's Enemy.
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Inspirational story. It reminds us that we cannot turn a blind eye to those who poke fun at those with disabilities. We need to stand up and speak out. Even to those who have a high position like our president who poked fun at someone who has a disability. It is NEVER okay to make fun of those who have a disability. Those who do so lack empathy and need to reminded that such hurtful action is not acceptable.
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We demonstrate theoretically that a charge current and a spin current are
generated by spin dynamics in the presence of spin-orbit interaction in the
perturbative regime. We consider a general spin-orbit interaction including the
spatially inhomogeneous case. Spin current due to spin damping is identified as
one origin of generated charge current, but other contributions exist, such as
the one due to an induced conservative field and the one arising from the
inhomogeneity of spin-orbit interaction.
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The Web has become a potentially infinite information resource, turning into
an essential tool for many daily activities. This resulted in an increase in
the amount of information available in users' contexts that is not taken into
account by current information retrieval systems. This thesis proposes a
semisupervised information retrieval technique that helps users to recover
context relevant information. The objective of the proposed technique is to
reduce the vocabulary gap existing between the knowledge a user has about a
specific topic and the relevant documents available in the Web. This thesis
presents a method for learning novel terms associated with a thematic context.
This is achieved by identifying those terms that are good descriptors and good
discriminators of the user's current thematic context. In order to evaluate the
proposed method, a theoretical framework for the evaluation of search
mechanisms was developed. This served as a guide for the implementation of an
evaluation framework that allowed to compare the techniques proposed in this
thesis with other techniques existing in the literature. The experimental
evidence indicates that the methods proposed in this thesis present significant
improvements over previously published techniques. In addition, the evaluation
framework was equipped with novel evaluation metrics that favor the exploration
of novel material and incorporates a semantic relationship metric between
documents. The algorithms developed in this thesis evolve high quality queries,
which have the capability of retrieving results that are relevant to the user
context. These results have a positive impact on the way users interact with
available resources.
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A lot of scenery for a reasonable price
This is a nice set of scatter scenery to build out your collection of objects for table top roleplaying games. It has most of what you need to run a historical town encounter. The only issue I had was that the legs of the awnings were warped, causing them to list and look odd.
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We propose an l1-regularized likelihood method for estimating the inverse
covariance matrix in the high-dimensional multivariate normal model in presence
of missing data. Our method is based on the assumption that the data are
missing at random (MAR) which entails also the completely missing at random
case. The implementation of the method is non-trivial as the observed negative
log-likelihood generally is a complicated and non-convex function. We propose
an efficient EM algorithm for optimization with provable numerical convergence
properties. Furthermore, we extend the methodology to handle missing values in
a sparse regression context. We demonstrate both methods on simulated and real
data.
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The static and dynamic magnetic properties of the Nd$_3$Ga$_5$SiO$_{14}$
compound, which appears as the first materialization of a rare-earth
kagome-type lattice, were re-examined, owing to contradictory results in the
previous studies. Neutron scattering, magnetization and specific heat
measurements were performed and analyzed, in particular by fully taking account
of the crystal electric field effects on the Nd$^{3+}$ ions. One of the novel
findings is that the peculiar temperature independent spin dynamics observed
below 10 K expresses single-ion quantum processes. This would short-circuit the
frustration induced cooperative dynamics, which would emerge only at very low
temperature.
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We show that the nature of quantum phases around the superconductor-insulator
transition (SIT) is controlled by charge-vortex topological interactions and
does not depend on the details of material parameters and disorder. We find
three distinct phases, superconductor, superinsulator and bosonic topological
insulator. The superinsulator is a state of matter with infinite resistance in
a finite temperature range, which is the S-dual of the superconductor and in
which charge transport is prevented by electric strings binding charges of
opposite sign. The electric strings ensuring linear confinement of charges are
generated by instantons and are dual to superconducting Abrikosov vortices.
Material parameters and disorder enter the London penetration depth of the
superconductor, the string tension of the superinsulator and the quantum
fluctuation parameter driving the transition between them. They are entirely
encoded in four phenomenological parameters of a topological gauge theory of
the SIT. Finally, we point out that, in the context of strong coupling gauge
theories, the many-body localization phenomenon that is often referred to as an
underlying mechanism for superinsulation is a mere transcription of the
well-known phenomenon of confinement into solid state physics language and is
entirely driven by endogenous disorder embodied by instantons with no need of
exogenous disorder.
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We study exact, volume-preserving diffeomorphisms that have heteroclinic
connections between a pair of normally hyperbolic invariant manifolds. We
develop a general theory of lobes, showing that the lobe volume is given by an
integral of a generating form over the primary intersection, a subset of the
heteroclinic orbits. Our definition reproduces the classical action formula in
the planar, twist map case. For perturbations from a heteroclinic connection,
the lobe volume is shown to reduce, to lowest order, to a suitable integral of
a Melnikov function.
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Natural coordinate system will be proposed. In this coordinate system
alignment procedure of a device and a detector can be easily performed. This
approach is generalization of previous specific formulas in the field of
calibration and provide top level description of the procedure. A basic example
application to linac therapy plan is also provided.
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We study the mixed Hodge theoretic aspects of the B-model side of local
mirror symmetry. Our main objectives are to define an analogue of the Yukawa
coupling in terms of the variations of the mixed Hodge structures and to study
its properties. We also describe a local version of
Bershadsky-Cecotti-Ooguri-Vafa's holomorphic anomaly equation.
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A key ingredient in quantum resource theories is a notion of measure. Such as
a measure should have a number of fundamental properties, and desirably also a
clear operational meaning. Here we show that a natural measure known as the
convex weight, which quantifies the resource cost of a quantum device, has all
the desired properties. In particular, the convex weight of any quantum
resource corresponds exactly to the relative advantage it offers in an
exclusion task. After presenting the general result, we show how the
construction works for state assemblages, sets of measurements and sets of
transformations. Moreover, in order to bound the convex weight analytically, we
give a complete characterisation of the convex components and corresponding
weights of such devices.
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We derive the asymptotic behavior of weighted quadratic variations of
fractional Brownian motion $B$ with Hurst index $H=1/4$. This completes the
only missing case in a very recent work by I. Nourdin, D. Nualart and C. A.
Tudor. Moreover, as an application, we solve a recent conjecture of K. Burdzy
and J. Swanson on the asymptotic behavior of the Riemann sums with alternating
signs associated to $B$.
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Infrared Dark Clouds (IRDCs) represent the earliest observed stages of
clustered star formation, characterized by large column densities of cold and
dense molecular material observed in silhouette against a bright background of
mid-IR emission. Up to now, IRDCs were predominantly known toward the inner
Galaxy where background infrared emission levels are high. We present Spitzer
observations with the Infrared Camera Array toward object G111.80+0.58 (G111)
in the outer Galactic Plane, located at a distance of ~3 kpc from us and ~10
kpc from the Galactic center. Earlier results show that G111 is a massive, cold
molecular clump very similar to IRDCs. The mid-IR Spitzer observations
unambiguously detect object G111 in absorption. We have identified for the
first time an IRDC in the outer Galaxy, which confirms the suggestion that
cluster-forming clumps are present throughout the Galactic Plane. However,
against a low mid-IR back ground such as the outer Galaxy it takes some effort
to find them.
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We present a fully data-driven method to compute depth from diverse monocular
video sequences that contain large amounts of non-rigid objects, e.g., people.
In order to learn reconstruction cues for non-rigid scenes, we introduce a new
dataset consisting of stereo videos scraped in-the-wild. This dataset has a
wide variety of scene types, and features large amounts of nonrigid objects,
especially people. From this, we compute disparity maps to be used as
supervision to train our approach. We propose a loss function that allows us to
generate a depth prediction even with unknown camera intrinsics and stereo
baselines in the dataset. We validate the use of large amounts of Internet
video by evaluating our method on existing video datasets with depth
supervision, including SINTEL, and KITTI, and show that our approach
generalizes better to natural scenes.
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We have performed a computational screening of topological two-dimensional
(2D) materials from the Computational 2D Materials Database (C2DB) employing
density functional theory. A full \textit{ab initio} scheme for calculating
hybrid Wannier functions directly from the Kohn-Sham orbitals has been
implemented and the method was used to extract $\mathbb{Z}_2$ indices, Chern
numbers and Mirror Chern numbers of 3331 2D systems including both
experimentally known and hypothetical 2D materials. We have found a total of 46
quantum spin Hall insulators, 7 quantum anomalous Hall insulators and 9
crystalline topological insulators that are all predicted to be dynamically
stable. Roughly one third of these were known prior to the screening. The most
interesting of the novel topological insulators are investigated in more
detail. We show that the calculated topological indices of the quantum
anomalous Hall insulators are highly sensitive to the approximation used for
the exchange-correlation functional and reliable predictions of the topological
properties of these materials thus require methods beyond density functional
theory. We also performed $GW$ calculations, which yield a gap of 0.65 eV for
the quantum spin Hall insulator PdSe$_2$ in the MoS$_2$ crystal structure. This
is significantly higher than any known 2D topological insulator and three times
larger than the Kohn-Sham gap.
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Sarah Tew/CNET
CES 2020 is going to be packed with new tech ready to advance the gaming world. While we won't know many of the details until the week of the show, it looks like there will be plenty happening in the gaming industry, including new PC components, accessories and ways to make video games more immersive with augmented reality, virtual reality and haptic technology.
Here's some of what we expect to see at CES 2020.
Read more: CES 2020 preview: PCs, laptops, tablets and gaming
What should we be on the lookout for from major companies?
We could see announcements from Intel, AMD and Nvidia, which could come with new CPUs or GPUs. Last year, Nvidia's 2080 graphics card series for laptops garnered a lot of attention at the show. New gaming PCs could be on the horizon from Alienware, Dell's in-house gaming brand, HP, Asus and others. Last year, for example, Alienware released the 17-inch m17 gaming laptop alongside an updated m15. Razer also typically has some gaming surprises -- last year, it unveiled the Razer Blade 15 Advanced laptop, and a new concept design for a high-end gaming display.
New gaming components for PC and console
Iogear could have some new gamer accessories for PCs, particularly keyboards, mice, headsets, emulators and more. Looking around the show floor map, we see Shenzen companies such as GCHT Gaming, which specializes in game controllers, and Gamtec Technology Development, Mijoy and Riitek, which offer products like gaming accessories for PC, PS4, Xbox, Switch and Android.
Virtual reality and immersive gaming through haptics
Cybershoes
At CES 2020, we can expect to see technology that further immerses players in video games -- like Cybershoes that let you "walk and run" in a virtual reality game. You'll be able to feel the game around you with BHaptic's wireless full-body haptic suit -- Tactsuit -- which is comprised of a haptic HMDS, a vest and sleeves for the hands, arms and feet. You'll be able to feel samurai slashes, gunshots, zombie bites and hugs in VR content in the Oculus store and on Steam, according to BHaptics. The gear looks like a cross between the suits found in Pacific Rim and Ready Player One.
While on the topic of haptics, if a suit isn't your style, Arcadeo has a haptic gaming chair that you can control with a mobile app. GT Throne is also bringing a sleek, interactive gaming chair that vibrates to audio.
Immersion Corporation also has haptics tech to show off, and is looking to "revolutionize human-machine interface in a digital world." Some of Immersion's features for mobile gaming focus on AR and VR, in terms of making games more tactile, using filters and more.
It should be noted, however, that many products on display at CES never actually come to market, so don't get too excited just yet.
Expanding the senses
In addition to vibrations and VR, sound plays a big part in making a game more immersive. Flexound is going to show off its Augmented Audio tech, which adds the sensation of touch to audio-visual listening experiences like music, games, television, movies and more. While it seems like Augmented Audio is focused on moviegoers, we could see it migrate into gaming chairs in the future.
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We propose a new technique for estimating spatially varying parametric
materials from a single image of an object with unknown shape in unknown
illumination. Our method uses a low-order parametric reflectance model, and
incorporates strong assumptions about lighting and shape. We develop new priors
about how materials mix over space, and jointly infer all of these properties
from a single image. This produces a decomposition of an image which
corresponds, in one sense, to microscopic features (material reflectance) and
macroscopic features (weights defining the mixing properties of materials over
space). We have built a large dataset of real objects rendered with different
material models under different illumination fields for training and ground
truth evaluation. Extensive experiments on both our synthetic dataset images as
well as real images show that (a) our method recovers parameters with
reasonable accuracy; (b) material parameters recovered by our method give
accurate predictions of new renderings of the object; and (c) our low-order
reflectance model still provides a good fit to many real-world reflectances.
|
Within the idealized scheme of a 1-dimensional Frenkel-Kontorova-like model,
a special "quantized" sliding state was found for a solid lubricant confined
between two periodic layers [PRL 97, 056101 (2006)]. This state, characterized
by a nontrivial geometrically fixed ratio of the mean lubricant drift velocity
<v_cm> and the externally imposed translational velocity v_ext, was understood
as due to the kinks (or solitons), formed by the lubricant due to
incommensuracy with one of the substrates, pinning to the other sliding
substrate. A quantized sliding state of the same nature is demonstrated here
for a substantially less idealized 2-dimensional model, where atoms are allowed
to move perpendicularly to the sliding direction and interact via Lennard-Jones
potentials. Clear evidence for quantized sliding at finite temperature is
provided, even with a confined solid lubricant composed of multiple (up to 6)
lubricant layers. Characteristic backward lubricant motion produced by the
presence of "anti-kinks" is also shown in this more realistic context.
|
Recent data on isoscalar giant monopole resonance (ISGMR) in the calcium
isotopes $^{40,44,48}$Ca have suggested that $K_\tau$, the asymmetry term in
the nuclear incompressibility, has a positive value. A value of $K_\tau > 0$ is
entirely incompatible with present theoretical frameworks and, if correct,
would have far-reaching implications on our understanding of myriad nuclear and
astrophysical phenomena. This paper presents results of an independent ISGMR
measurement with the $^{40,42,44,48}$Ca($\alpha,\alpha^\prime$) reaction at
$E_\alpha = 386$ MeV. These results conclusively discount the possibility of a
positive value for $K_\tau$, and are consistent with the previously-obtained
values for this quantity.
|
A DNN architecture referred to as GPRInvNet was proposed to tackle the
challenges of mapping the ground-penetrating radar (GPR) B-Scan data to complex
permittivity maps of subsurface structures. The GPRInvNet consisted of a
trace-to-trace encoder and a decoder. It was specially designed to take into
account the characteristics of GPR inversion when faced with complex GPR B-Scan
data, as well as addressing the spatial alignment issues between time-series
B-Scan data and spatial permittivity maps. It displayed the ability to fuse
features from several adjacent traces on the B-Scan data to enhance each trace,
and then further condense the features of each trace separately. As a result,
the sensitive zones on the permittivity maps spatially aligned to the enhanced
trace could be reconstructed accurately. The GPRInvNet has been utilized to
reconstruct the permittivity map of tunnel linings. A diverse range of
dielectric models of tunnel linings containing complex defects has been
reconstructed using GPRInvNet. The results have demonstrated that the GPRInvNet
is capable of effectively reconstructing complex tunnel lining defects with
clear boundaries. Comparative results with existing baseline methods also
demonstrated the superiority of the GPRInvNet. For the purpose of generalizing
the GPRInvNet to real GPR data, some background noise patches recorded from
practical model testing were integrated into the synthetic GPR data to retrain
the GPRInvNet. The model testing has been conducted for validation, and
experimental results revealed that the GPRInvNet had also achieved satisfactory
results with regard to the real data.
|
Let $F$ be a field and a finite $A\subset F$ be sufficiently small in terms
of the characteristic $p$ of $F$ if $p>0$.
We strengthen the "threshold" sum-product inequality $$|AA|^3 |A\pm A|^2 \gg
|A|^6\,,\;\;\;\;\mbox{hence} \;\; \;\;|AA|+|A+A|\gg |A|^{1+\frac{1}{5}},$$ due
to Roche-Newton, Rudnev and Shkredov, to
$$|AA|^5 |A\pm A|^4 \gg |A|^{11-o(1)}\,,\;\;\;\;\mbox{hence} \;\;
\;\;|AA|+|A\pm A|\gg |A|^{1+\frac{2}{9}-o(1)},$$ as well as $$
|AA|^{36}|A-A|^{24} \gg |A|^{73-o(1)}. $$ The latter inequality is
"threshold-breaking", for it shows for $\epsilon>0$, one has $$|AA| \le
|A|^{1+\epsilon}\;\;\;\Rightarrow\;\;\; |A-A|\gg
|A|^{\frac{3}{2}+c(\epsilon)},$$ with $c(\epsilon)>0$ if $\epsilon$ is
sufficiently small.
This implies that regardless of $\epsilon$, $$|AA-AA|\gg
|A|^{\frac{3}{2}+\frac{1}{56}-o(1)}\,.$$
|
This paper mainly discusses the American option's hedging strategies via
binomialmodel and the basic idea of pricing and hedging American option.
Although the essential scheme of hedging is almost the same as European option,
small differences may arise when simulating the process for American option
holder has more rights, spelling that the option can be exercised at anytime
before its maturity. Our method is dynamic-hedging method.
|
Shannon's entropy and other entropy-based concepts are derived from the new,
more general concept of relative divergence of one "grading' function on a
linearly ordered set from another such function. The definition of relative
divergence is derived based on "common sense' assumptions about comparing
grading functions. Shannon's entropy formulas emerge from the respective
relative divergence ones, entropy based methods are extended to more general
cases and some new applications.
|
Booter services continue to provide popular DDoS-as-a-service platforms and
enable anyone irrespective of their technical ability, to execute DDoS attacks
with devastating impact. Since booters are a serious threat to Internet
operations and can cause significant financial and reputational damage, they
also draw the attention of law enforcement agencies and related counter
activities. In this paper, we investigate booter-based DDoS attacks in the wild
and the impact of an FBI takedown targeting 15 booter websites in December 2018
from the perspective of a major IXP and two ISPs. We study and compare attack
properties of multiple booter services by launching Gbps-level attacks against
our own infrastructure. To understand spatial and temporal trends of the DDoS
traffic originating from booters we scrutinize 5 months, worth of inter-domain
traffic. We observe that the takedown only leads to a temporary reduction in
attack traffic. Additionally, one booter was found to quickly continue
operation by using a new domain for its website.
|
All accretion models of gamma-ray bursts share a common assumption: accretion
power and gravitational binding energy is released and then dissipated locally,
with the mass of its origin. This is equivalent to the Shakura-Sunyaev 1973
(SS73) prescription for the dissipation of accretion power and subsequent
conversion into radiate output. Since their seminal paper, broadband
observations of quasars and black hole X-ray binaries insist that the SS73
prescription cannot wholly describe their behavior. In particular, optically
thick black hole accretion flows are almost universally accompanied by coronae
whose relative power by far exceeds anything seen in studies of stellar
chromospheric and coronal activity. In this note, we briefly discuss the
possible repercussions of freeing accretion models of GRBs from the SS73
prescription. Our main conclusion is that the efficiency of converting
gravitational binding energy into a GRB power can be increased by an order of
magnitude or more.
|
Generation of quasi-particle--hole pairs in gapped graphene monolayers in the
combined field of two counterpropagating light waves is studied. The process
represents an analogue of electron-positron pair production from the QED vacuum
by the Breit-Wheeler effect. We show, however, that the two-dimensional
structure of graphene causes some striking differences between both scenarios.
In particular, contrary to the QED case, it allows for non-zero pair production
rates at the energy threshold when the Breit-Wheeler reaction proceeds
nonlinearly with absorption of three photons.
|
In this paper, we study the impact of network latency on the time required to
download a file distributed using BitTorrent. This study is essential to
understand if testbeds can be used for experimental evaluation of BitTorrent.
We observe that the network latency has a marginal impact on the time required
to download a file; hence, BitTorrent experiments can performed on testbeds.
|
Toronto's first new baby of 2020 arrived just seconds after the stroke of midnight at Humber River Hospital.
The child, Amiir Deeq Mohammed, was successfully delivered at precisely 12:00 a.m. on New Year's Day. The hospital said he arrived almost instantly after the clock struck midnight.
"I'm very happy to have this miracle boy," said his father Deeq Mohameed Farah after welcoming the family's first-born child.
Amiir's time of birth was listed as "0000" on a whiteboard in the family's hospital room.
Little Amiir barely edged his fellow 2020 baby Aryan Walia, who was born 50 seconds after midnight at Credit Valley Hospital in Mississauga.
Anu Walia, left, and Simran Walia met little Aryan just 50 seconds after midnight. (Martin Trainor/CBC)
"We definitely weren't expecting the baby to come on New Year's Day," said mother Anu Walia. Her first child was due later in January, but made a surprise appearance a few weeks before schedule.
"Our whole world changed. Best New Year's ever," added Aryan's father Simran Walia.
According to Statistics Canada, the country's most recent population estimate is 37,874,794.
|
The Spectre vulnerability in modern processors has been widely reported. The
key insight in this vulnerability is that speculative execution in processors
can be misused to access the secrets. Subsequently, even though the
speculatively executed instructions are squashed, the secret may linger in
micro-architectural states such as cache, and can potentially be accessed by an
attacker via side channels. In this paper, we propose oo7, a static analysis
approach that can mitigate Spectre attacks by detecting potentially vulnerable
code snippets in program binaries and protecting them against the attack by
patching them. Our key contribution is to balance the concerns of
effectiveness, analysis time and run-time overheads. We employ control flow
extraction, taint analysis, and address analysis to detect tainted conditional
branches and speculative memory accesses. oo7 can detect all fifteen
purpose-built Spectre-vulnerable code patterns, whereas Microsoft compiler with
Spectre mitigation option can only detect two of them. We also report the
results of a large-scale study on applying oo7 to over 500 program binaries
(average binary size 261 KB) from different real-world projects. We protect
programs against Spectre attack by selectively inserting fences only at
vulnerable conditional branches to prevent speculative execution. Our approach
is experimentally observed to incur around 5.9% performance overheads on
SPECint benchmarks.
|
Discrete structures in Hilbert space play a crucial role in finding optimal
schemes for quantum measurements. We solve the problem whether a complete set
of five iso-entangled mutually unbiased bases exists in dimension four,
providing an explicit analytical construction. The reduced density matrices of
these $20$ pure states forming this generalized quantum measurement form a
regular dodecahedron inscribed in a sphere of radius $\sqrt{3/20}$ located
inside the Bloch ball of radius $1/2$. Such a set forms a mixed-state
$2$-design --- a discrete set of quantum states with the property that the mean
value of any quadratic function of density matrices is equal to the integral
over the entire set of mixed states with respect to the flat Hilbert-Schmidt
measure. We establish necessary and sufficient conditions mixed-state designs
need to satisfy and present general methods to construct them. Furthermore, it
is shown that partial traces of a projective design in a composite Hilbert
space form a mixed-state design, while decoherence of elements of a projective
design yields a design in the classical probability simplex. We identify a
distinguished two-qubit orthogonal basis such that four reduced states are
evenly distributed inside the Bloch ball and form a mixed-state $2$-design.
|
Ah yez, the Sci Fi Channel produces Yeti another abominable movie. I was particularly taken by the scenes immediately following the crash where, as the survivors desperately searched for matches, at least a half dozen fires burned with no apparent reason at various points of the wreckage. Fire seemed to be a predominate theme throughout. They searched corpses for lighters and matches, and finally finding a box built a fire every day for, apparently, 12, but no one ever gathered wood. Then when the vegan (hah) burned the bodies, what did she use for an accelerant? I mean these guys were frozen well maybe not. Despite the apparent low temperature everything the yeti ate, bled. Maybe it's just me, but even in a totally unbelievable tale (none of the survivors had ever heard of a yeti, or an abominable snowman, until the very end), if you take care of the little things the bigger deals become more acceptable. Oh, what did the prologue (1972) have to do with the remainder of the movie? And the revolver, warm enough to hold in his hand, froze up and wouldn't fire. Gimme a break. Well, at least we have Carly Pope, another eminently lovely Canadian lass. And, with little irony, Ed Marinaro as the coach.<br /><br />Well I might as well add, the rabbit they ate (despite it looking like chicken) is not a rodent, but a lagomorph. Now if it had been a squirrel (or a rat) it would have been a rodent, but it still looked like chicken. And the writers missed a real chance to have someone note "It tastes just like..."
|
Well let's be fair. Following up a cult classic like Road House is no easy task. Now subtract Swayze from the equation and you get a monumental task. So with Patrick not on board whose bonehead idea was it to proceed anyway and make this piece of garbage? I am going to blame the director who didn't even provide 5 minutes of decent footage throughout the entire film. I was actually shocked they got Will Patton (Armaggedon) to jump on board. Johnathon Schaech did an OK job with the lead but the writing was atrocious. Turning down his partner brunette bombshell (Crystal Mantecon) in the film's first 5 minutes made me want to eject it right there. But I stuck with the film hoping to catch a glimpse of that great cheesy humor that worked so well with the Double Duece. No such luck. The cover of the DVD is hilarious, they show these two stacked blondes who make one 10 second appearance in the film. Costar Ellen Hollman actually puts in a decent performance as well. But again the effort is futile in a piece of garbage and disgrace such as this. Has Jake Busey ever been cast in a decent film? Could they not pull at least a few actors in from the first film for some kind of nostalgia treatment? Even one of the old bouncers or two, or Jeff Healey for a performance would have been nice. Take this film out of your Queue immediately. -LostFlix
|
Over priced
Nothing special just piece of silicon obviously. Kinda disappointed because I had keyboard protectors in the past, this one was kinda sticky and uncomfortable to use tbh I rather not use it actually I'm just using this untill I can find the previous brand I order my protector from. I think it's definitely over priced for the quality it is.
|
In this paper, we consider the average age minimization problem where a
central entity schedules M users among the N available users for transmission
over unreliable channels. It is well-known that obtaining the optimal policy,
in this case, is out of reach. Accordingly, the Whittle's index policy has been
suggested in earlier works as a heuristic for this problem. However, the
analysis of its performance remained elusive. In the sequel, we overcome these
difficulties and provide rigorous results on its asymptotic optimality in the
many-users regime. Specifically, we first establish its optimality in the
neighborhood of a specific system's state. Next, we extend our proof to the
global case under a recurrence assumption, which we verify numerically. These
findings showcase that the Whittle's index policy has analytically provable
optimality in the many-users regime for the AoI minimization problem. Finally,
numerical results that showcase its performance and corroborate our theoretical
findings are presented.
|
We give a short and streamlined proof of the following statement recently
proven by the author and M. Zeinalian: the cobar construction of the dg
coassociative coalgebra of normalized singular chains on a path-connected
pointed space is naturally quasi-isomorphic as a dg associative algebra to the
singular chains on the based loop space. This extends a classical theorem of F.
Adams originally proven for simply connected spaces. Our proof is based on
relating the cobar functor to the left adjoint of the homotopy coherent nerve
functor.
|
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