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We have developed several distinct model systems of microtubule-based 3D
active isotropic fluids and have compared their dynamical and structural
properties. The non-equilibrium dynamics of these fluids is powered by three
different types of kinesin motors: a processive motor, a non-processive motor,
and a motor which is permanently linked to a microtubule backbone. The fourth
modification uses specific microtubule crosslinkers to induce bundle formation
instead of a non-specific depletant. In comparison to the formerly developed
systems, each new active fluid formulation has certain enhanced properties.
Firstly, linking motors to the microtubule backbone enhances the fluid lifetime
from hours to several days. Furthermore, switching to the non-processive motors
significantly increases the temporal stability of the active dynamics, while
using specific cross-linkers yields systems that can incorporate other passive
soft materials, such as, polymer gels or liquid crystals. These novel developed
model systems will significantly aid and improve our ability to quantify
diverse phenomena observed in microtubule based active matter.
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Obama, very selective on what he says in the media. How about some of your wisdom on NKorea? Silence? I thought so. If you are going to stay silent on your international failures with Russia, China, and the DPRK then just keep your trap shut period and stop continuing to create dissension.
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I do not find this show at all funny. I actually think it is much worse than any of the other terrible Disney channel sit-coms right now. Charlotte Arnold is an interesting choice to play Sadie, because she can't act. The jokes on this show are terribly unfunny, and it makes it even worse when the only cast member that has a little bit (and I mean little bit) of acting talent is Justin Bradley as Sadie's brother Hal. Jasmine Richards and Michael D'Ascenzo portray Sadie's friends. There both really stupid and just terrible actors. Two words that can really describe this show is terribly corny. It's corny humor that only little girls find funny because their brains have not developed yet. Now I've explained my hatred for the acting and the horrible humor, what's next? The whole premise of the show is a stupid idea. She changed again (not so sciencey an Ben-loving) and suddenly nobody recognizes her? It's moronic. In summation, I hate this show, however little girls who do not have a concept of funny will enjoy it, so I guess that's what they're going for over quality. Although i can say as much as, the first season is clearly better than the second.<br /><br />BOTTOM LINE: JUST DON'T WATCH ANY OF IT.<br /><br />My rating: Awful show. TV G. 30 mins.
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First conformal transformations of the $S$-matrix are derived in massless
$\phi^4$-theory. Then it is shown that the anomalous transformations can be
rewritten as a symmetry once one has introduced a local coupling and interprets
the charge of the symmetry accordingly. By introducing a suitable effective
coupling on which the $S$-matrix depends one is able to identify via the
$\beta$-function an underlying new spacetime with non-trivial conformal (flat)
metric.
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Had to use a piece of Velcro on my hard hat and the shade because it kept wanting to spin around when I worked but other than th
Purchased the blue color... It's very big but provides a lot of shade. It doesn't touch my neck or get in the way when I work. Had to use a piece of Velcro on my hard hat and the shade because it kept wanting to spin around when I worked but other than that I love it.
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nice light (we already had a similar night light so ...
Cute, nice light (we already had a similar night light so we wanted something to go in the other child's room), but the eyeballs fell out almost immediately when we started to charge it. We couldn't get it right back in the eye hole and when trying to push it back in, the eye went inside the light. It is a functional light but the little eyes falling off is a concern for me with smaller children who may pick them up and accidentally put it in their mouths.
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To study the question of whether every two-dimensional Pr\"ufer domain
possesses the stacked bases property, we consider the particular case of the
Pr\"ufer domains formed by integer-valued polynomials. The description of the
spectrum of the rings of integer-valued polynomials on a subset of a rank-one
valuation domain enables us to prove that they all possess the stacked bases
property. We also consider integer-valued polynomials on rings of integers of
number fields and we reduce in this case the study of the stacked bases
property to questions concerning $2\times 2$-matrices.
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Four of nine exoplanets found by microlensing were detected by the resonant
caustic, which represents the merging of the planetary and central caustics at
the position when the projected separation of a host star and a bounded planet
is s~1. One of the resonant caustic lensing events, OGLE-2005-BLG-169, was a
caustic-crossing high-magnification event with $A_{max} \sim$ 800 and the
source star was much smaller than the caustic, nevertheless the perturbation
was not obviously apparent on the light curve of the event. In this paper, we
investigate the perturbation pattern of the resonant caustic to understand why
the perturbations induced by the caustic do not leave strong traces on the
light curves of high-magnification events despite a small source/caustic size
ratio. From this study, we find that the regions with
small-magnification-excess around the center of the resonant caustic are rather
widely formed, and the event passing the small-excess region produces a
high-magnification event with a weak perturbation that is small relative to the
amplification caused by the star and thus does not noticeably appear on the
light curve of the event. We also find that the positive excess of the inside
edge of the resonant caustic and the negative excess inside the caustic become
stronger and wider as $q$ increases, and thus the resonant caustic-crossing
high-magnification events with the weak perturbation occur in the range of $q
\leqslant 10^{-4}$. We determine the probability of the occurrence of events
with the small excess $|\epsilon| \leqslant 3 %$ in high-magnification events
induced by a resonant caustic. As a result, we find that for the Earth-mass
planets with a separation of ~ 2.5 AU, the resonant caustic high-magnification
events with the weak perturbation can occur with a significant frequency.
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Analysis of survival data with biased samples caused by left-truncation or
length-biased sampling has received extensive interest. Many inference methods
have been developed for various survival models. These methods, however, break
down when survival data are typically error-contaminated. Although error-prone
survival data commonly arise in practice, little work has been available in the
literature for handling length-biased data with measurement error. In survival
analysis, the transformation model is one of the frequently used models.
However, methods of analyzing the transformation model with those complex
features have not been fully explored. In this paper, we study this important
problem and develop a valid inference method under the transformation model. We
establish asymptotic results for the proposed estimators. The proposed method
enjoys appealing features in that there is no need to specify the distribution
of the covariates and the increasing function in the transformation model.
Numerical studies are reported to assess the performance of the proposed
method.
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We study supercritical branching Brownian motion on the real line starting at
the origin and with constant drift $c$. At the point $x > 0$, we add an
absorbing barrier, i.e.\ individuals touching the barrier are instantly killed
without producing offspring. It is known that there is a critical drift $c_0$,
such that this process becomes extinct almost surely if and only if $c \ge
c_0$. In this case, if $Z_x$ denotes the number of individuals absorbed at the
barrier, we give an asymptotic for $P(Z_x=n)$ as $n$ goes to infinity. If
$c=c_0$ and the reproduction is deterministic, this improves upon results of L.
Addario-Berry and N. Broutin (2011) and E. A\"{\i}d\'ekon (2010) on a
conjecture by David Aldous about the total progeny of a branching random walk.
The main technique used in the proofs is analysis of the generating function of
$Z_x$ near its singular point 1, based on classical results on some complex
differential equations.
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This movie starts off on the wrong foot and never really gets it going. The first scene shows a Life Flight helicopter landing and just outside the window you can distinctly see mountains in the background. For those of you who might not ever have been to Houston there is no elevation change. The city sits just above sea level and a 5 ft. incline is considered a big hill. To go along with that scenery, any shots outside of the hospital immediately tell the viewer that they are not in Houston. The trees are all missing leaves or are pine trees, neither of which Houston has very much of. Even the hospital itself, on the outside, is very unbelievable. Memorial Hermann Hospital is one of the top hospitals in the United States and sits smack dab in the middle of the Medical District just miles from downtown Houston, yet every outside shot of the hospital makes it appear that the hospital is out in the suburbs or even the countryside.<br /><br />It is obvious that whoever was in charge of the actual tropical storm part of the movie skimped out because the numerous shots of radar are all wrong. The first radar image in the movie is that of Hurrican Hugo hitting South Carolina. We later see Kris Kristofferson leaving his job and one of his assistants tells him that Alison is moving back south across Houston yet the radar image he shows has Alison clearly moving north off of the Gulf of Mexico into Houston...probably the initial landfall of Alison.<br /><br />As for the acting, it isn't all that bad. JoBeth Williams, Kris Kristofferson and Rick Schroder all do a decent job considering that this is a straight-to-TV movie. The plot of the story is decent and the fact that it is based on a true story makes it a bit more entertaining. My one problem with the acting is the portrayal of Houstonians with big thick Southern accents...the actors all sound like they are from Birmingham, Alabama and not Houston, Texas.<br /><br />The movie gets its point across and to the general audience it does exactly what it is meant to: entertain. If you are looking for a factual account of what happened to the city of Houston in June of 2001 then you will be disappointed. One thing to keep in mind before viewing this movie is that it is based solely on the evacuation of Memorial Hermann Hospital and not on Tropical Storm Alison and the impact on Houston metro itself. If you are looking for a factual account of Tropical Storm Alison's impact on Houston metro might I suggest watching The Weather Channel's Storm Stories for Tropical Storm Alison.<br /><br />*1/2 out of *****
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Meanwhile in the real world :
Trump is not yet guilty of an impeachable offence.....not yet.
Sessions should resign as AG
Trump should fire Sessions if he does not resign
Trump could own this ongoing mess and resign.
The way it's thrown about, "treason" could be jaywalking in the nation's capital
So, relax and consider the possibilities and the probabilities.
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Geometrical model for quantum objects is suggested. It is shown that
equations for free material Dirac field and for Maxwell electromagnetic field
can be considered as relations describing propagation of the space topological
defects. This interpretation explains irrational properties of quantum objects
such as wave-corpuscular duality, stochastic behavior, instantaneous nonlocal
correlation in EPR-paradox, the light velocity invariance and so on. It is
shown also that Dirac equation for hydrogen atom can be also considered as
relation describing the space topological defect. Electromagnetic potentials
appears within this approach as connectivities of the defect universal covering
space and gauge invariance of electromagnetic field happens to be a natural
consequence of topological interpretation. Proposed approach can be also
considered as a nonlocal model with hidden variables. Preliminary results were
published by parts early, and here they are presented completely.
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Pretty good
Not the best, not the worst. There were a few scents that I thought smelled a little different than usual, compared to other brands that I have used recently. I will probably try a different brand the next time I need more oils, I just don't feel 100% sold on these.
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B.C. Green Leader Andrew Weaver says Alberta should “get with the program” and move away from oil and gas.
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Agreed
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The first step should be for Alberta to stop shipments through the existing Kinder Morgan pipeline to the B.C. Interior and Lower Mainland.
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Almost 90 per cent of the fuel for Vancouver and the southern coast comes out of that pipeline, either as gasoline or crude to be refined and the Kinder Morgan system also supplies jet fuel to Vancouver Airport. . So Alberta has the power to halt all auto , truck and air travel within or in/out of Vancouver.
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And as most B.C. products going to the rest of Canada pass through Alberta noncooperation by BC invites Albertas retaliation against shipments of wine, lumber and scores of other products , in fact , natural gas producers in the B.C. northeast routinely send their product to Fort Saskatchewan for processing, and then bring it back for sale.
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cant wait
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# cutting off ones nose to spite ones face
#great leap backwards
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The $ O(GeV)$ extra $ U(1)$ gauge boson named U-boson, has been proposed to
mediate the interaction among leptons and dark matter (DM), in order to account
for the observations by PAMELA and ATIC. In such kind of models, the extra U(1)
gauge group can be chosen as $U(1)_{L_i-L_j}$ with $L_i$ the $i-$th generation
lepton number. This anomaly-free model provides appropriate dark matter relic
density and boost factor required by experiments. In this work the
observability of such kind of U-boson at BESIII detector is investigated
through the processes $ e^ + e^ - \to U\gamma$, followed by $U\to e^+e^-$,
$U\to \mu^+\mu^-$ and $U\to \nu\overline{\nu}$. In the invisible channel where
U-boson decays into neutrinos, BESIII can measure the coupling of the extra $
U(1)$ down to $ O(10^{- 4}) \sim O(10^{- 5})$ because of the low Standard Model
backgrounds. In the visible channel where U-boson decays into charged lepton
pair, BESIII can only measure the coupling down to $ O(10^{- 3}) \sim O(10^{-
4})$ due to the large irreducible QED backgrounds.
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An Automata Network is a map ${f:Q^n\rightarrow Q^n}$ where $Q$ is a finite
alphabet. It can be viewed as a network of $n$ entities, each holding a state
from $Q$, and evolving according to a deterministic synchronous update rule in
such a way that each entity only depends on its neighbors in the network's
graph, called interaction graph. A major trend in automata network theory is to
understand how the interaction graph affects dynamical properties of $f$. In
this work we introduce the following property called expansivity: the
observation of the sequence of states at any given node is sufficient to
determine the initial configuration of the whole network. Our main result is a
characterization of interaction graphs that allow expansivity. Moreover, we
show that this property is generic among linear automata networks over such
graphs with large enough alphabet. We show however that the situation is more
complex when the alphabet is fixed independently of the size of the interaction
graph: no alphabet is sufficient to obtain expansivity on all admissible
graphs, and only non-linear solutions exist in some cases. Finally, among other
results, we consider a stronger version of expansivity where we ask to
determine the initial configuration from any large enough observation of the
system. We show that it can be achieved for any number of nodes and naturally
gives rise to maximum distance separable codes.
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This paper studies the problem of predicting missing relationships between
entities in knowledge graphs through learning their representations. Currently,
the majority of existing link prediction models employ simple but intuitive
scoring functions and relatively small embedding size so that they could be
applied to large-scale knowledge graphs. However, these properties also
restrict the ability to learn more expressive and robust features. Therefore,
diverging from most of the prior works which focus on designing new objective
functions, we propose, DeCom, a simple but effective mechanism to boost the
performance of existing link predictors such as DistMult, ComplEx, etc, through
extracting more expressive features while preventing overfitting by adding just
a few extra parameters. Specifically, embeddings of entities and relationships
are first decompressed to a more expressive and robust space by decompressing
functions, then knowledge graph embedding models are trained in this new
feature space. Experimental results on several benchmark knowledge graphs and
advanced link prediction systems demonstrate the generalization and
effectiveness of our method. Especially, RESCAL + DeCom achieves
state-of-the-art performance on the FB15k-237 benchmark across all evaluation
metrics. In addition, we also show that compared with DeCom, explicitly
increasing the embedding size significantly increase the number of parameters
but could not achieve promising performance improvement.
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First formally defined by Borodin and Olshanski, a coherent system on a
graded graph is a sequence of probability measures which respect the action of
certain down/up transition functions between graded components. In one common
example of such a construction, each measure is the Plancherel measure for the
symmetric group $S_{n}$ and the down transition function is induced from the
inclusions $S_{n} \hookrightarrow S_{n+1}$.
In this paper we generalize the above framework to the case where $\{A_n\}_{n
\geq 0}$ is any free Frobenius tower and $A_n$ is no longer assumed to be
semisimple. In particular, we describe two coherent systems on graded graphs
defined by the representation theory of $\{A_n\}_{n \geq 0}$ and connect one of
these systems to a family of central elements of $\{A_n\}_{n \geq 0}$. When the
algebras $\{A_n\}_{n \geq 0}$ are not semisimple, the resulting coherent
systems reflect the duality between simple $A_n$-modules and indecomposable
projective $A_n$-modules.
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The era of Google using a pair of controversial loopholes to save billions of dollars in taxes on overseas ad revenue is coming to a close, according to a new report from Reuters. In 2020, the company will no longer take advantage of the so-called “Double Irish” and “Dutch sandwich” loopholes, which allowed it and countless other corporations to shift money from Ireland to the Netherlands and Bermuda, sheltering billions from taxes in the process.
The move comes as regulations aimed at changing how companies skirt taxes take effect in both the US and Ireland. Previously, multinational organizations like Google were able to use a network of affiliate organizations located in Ireland, the Netherlands, and Bermuda to collect and hold money made overseas, thanks in large part to lenient Irish tax laws.
Google used companies in Ireland, the Netherlands, and Bermuda to collect and hold money earned overseas
The name comes from the strategy of moving money from an Irish subsidiary to a Dutch holding company, and then back to an Irish shell company located in Bermuda that has the rights to license Google intellectual property, thus the “Dutch sandwich” in between. Bermuda has no corporate income tax, making it a lucrative final stop to report income. The whole process effectively avoids paying US income tax and European withholding taxes on overseas profits, although some money is still paid to the Irish government.
In 2014, facing mounting pressure from the EU and the US, Ireland closed these loopholes. Companies were given until 2020 to comply with the new regulations, which is why Google is just changing its tax structure now. Google continued to use the tax scheme to funnel money around the globe until the deadline. According to Reuters, the company moved $23 billion to Bermuda in 2017 alone using this tax avoidance strategy.
In the US, the Trump administration has also tried to incentivize companies to return profits to the US by lowering the corporate tax rate from 35 percent to 21 percent. The Tax Cuts and Jobs Act of 2018 allowed companies to return money made overseas to the US without facing more US taxes. These changes could prove critical for Google, which is sitting on tens of billions in overseas earnings.
“We’re now simplifying our corporate structure and will license our IP from the US, not Bermuda,” a Google spokesperson told The Verge. “Including all annual and one-time income taxes over the past ten years, our global effective tax rate has been over 23%, with more than 80% of that tax due in the US.”
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Palghar: The Shiv Sena-led coalition government in Maharashtra will be controlled by "Matoshree of Delhi" and not from "Matoshree" in Mumbai, senior BJP leader and former chief minister Devendra Fadnavis said on Wednesday in an apparent reference to Congress leadership.
Fadnavis made the remarks targetting Chief Minister and Sena president Uddhav Thackeray while campaigning for the upcoming Palghar Zilla Parishad elections.
"This government will be controlled not from 'Matoshree' (Thackeray's residence in suburban Mumbai), but by the 'Matoshree' of Delhi", the Leader of Opposition in the Legislative Assembly told a rally.
Fadnavis, however, didn't take any names while firing the "Matoshree in Delhi" barb. 'Matoshree' means mother in Marathi.
The NCP and the Congress are the other constituents in the Sena-led Maharashtra Vikas Aghadi (MVA) government. 'Matoshree' gradually emerged as a formidable power centre in Maharashtra politics when Sena founder Bal Thackeray was alive.
Many prominent personalities, including tallest political leaders of the BJP, Bollywood actors and even late King of Pop Michael Jackson, had visited "Matoshree" in suburban Bandra.
Fadnavis' remarks are set to raise hackles of the Sena, which always takes pride in "calling the shots" from the Bandra residence of the Thackerays.
Continuing his diatribe, Fadnavis also took a swipe at Uddhav Thackeray's comments that he had given a word to his father late Balasaheb Thackeray of making a Shiv Sainik the chief minister of Maharashtra. "Bal Thackeray will be crying in heaven if he learns about the Sena's move to go with the NCP and Congress after polls," Fadnavis said.
He also accused the Sena of "betraying" the public mandate by forging an alliance with the NCP and Congress after the state elections.
Fadnavis appealed to people to give a befitting reply to the Uddhav Thackeray-led party in the upcoming zilla parishad polls. It is unfortunate that the Shiv Sena has to compromise with those who "abused" Hindutva ideologue VD Savarkar, the BJP leader said, wondering how many days the Thackeray-led government will survive amid the "infighting".
The Sena not only "betrayed" the public mandate but also its pre-poll ally BJP with which it jointly contested the Assembly elections, he alleged.
Fadnavis said in the Assembly polls held in October last year, the BJP won 70 per cent of the seats that it contested and emerged as the single largest party, while the Shiv Sena bagged only 45 per cent of the seats that it fought.
"Citizens gave a clear mandate to the BJP-Shiv Sena combine, but unfortunately due to betrayal by the Sena, which joined hands with the NCP and Congress, the BJP has to remain out of power," he said. Hitting out at Uddhav Thackeray for "betraying" the BJP, he said from day one (since Sena formed government with the NCP and Congress), the three parties were not able to decide the names of ministers.
"Even after the selection of ministers, there is growing discontent among the Shiv Sena leaders and activists, and in case of the Congress, its activists have even gone to the extent of ransacking their party offices," he said.
On Tuesday, some supporters of Congress MLA Sangram Thopte had vandalised the party office in Pune to protest against his non-inclusion in the Maharashtra ministry, which was expanded on Monday.
Fadnavis said people of Maharashtra gave a "clear majority to the BJP-Shiv Sena combine" to form government, but later things took a different turn. He said citizens are witness to the political developments in the state.
"It is unfortunate that it took weeks (for the Thackeray-led alliance) to finalise government formation and then form the Cabinet," the BJP leader said.
On the farm loan waiver scheme announced by Thackeray, he said, "It is nothing but an eyewash and several conditions are attached to it, as a result of which nearly 60 lakh farmers in the state will not get benefit of the scheme."
The Shiv Sena made "tall claims" that the 7/12 (land title) of farmers would be made free of encumbrance. "They have taken the farmers for a ride and none of them will get the benefit," Fadnavis said, while recalling that Thackeray had earlier demanded Rs 25,000 per hectare for farmers who suffered from crop losses.
"Now, they have gone back on their word," he alleged.
Find latest and upcoming tech gadgets online on Tech2 Gadgets. Get technology news, gadgets reviews & ratings. Popular gadgets including laptop, tablet and mobile specifications, features, prices, comparison.
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We have developed a linearly-polarized Ytterbium-doped fiber ring laser with
single longitudinal-mode output at 1064nm for LISA and other space
applications. Single longitudinal-mode selection was achieved by using a fiber
Bragg grating (FBG) and a fiber Fabry-Perot (FFP). The FFP also serves as a
frequency-reference within our ring laser. Our laser exhibits comparable low
frequency and intensity noise to Non-Planar Ring Oscillator (NPRO). By using a
fiber-coupled phase modulator as a frequency actuator, the laser frequency can
be electro-optically tuned at a rate of 100kHz. It appears that our fiber ring
laser is promising for space applications where robustness of fiber optics is
desirable.
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This movie forever left an impression on me. I watched it as a Freshman in High School and was home alone that night. I think I lost all respect for Robert Reed as an actor having been a huge fan of the "Brady Bunch". I also thought the role of Chuck Connor was horrendous and evil. However, this movie made such an impact on me that I am now a volunteer in the women's state prison doing bible studies and church services and trying to change womens lives, one at a time. What fascinates me is that so few people actually watched this movie. None of my friends watched it and my family is clueless to this day when I discuss this movie because they didn't see it.
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We show how the necessary and sufficient conditions for the NFL to apply can
be reduced to the single requirement of the set of objective functions under
consideration being closed under permutation, and quantify the extent to which
a set of objectives not closed under permutation can give rise to a performance
difference between two algorithms. Then we provide a more refined definition of
performance under which we show that revisiting algorithms are always trumped
by enumerative ones.
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so I ended up doing them by hand which worked way better. I think next time I will skip the ...
Either I am using it very wrong, or it's just not user friendly. I followed the YouTube tutorial link to the T, and everything was working as I had hoped it would until it got to the point where you actually put on the caps to the filled capsules. Once I was doing that the caps misaligned and cracked a bunch of the capsules I was using, so I ended up doing them by hand which worked way better. I think next time I will skip the part of trying to put on the caps by using the tool, but instead doing it by hand. That's what I would recommend if you buy this product. Also, make sure that you do this on a cutting board or some surface that you can scrape off extra powders that go into the capsules. You're going to make a mess with this thing, so if you put a large cutting board down first it will help you capture some of the lost powder to reuse.
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We give a new deterministic construction of integer sensing matrices that can
be used for the recovery of integer-valued signals in compressed sensing. This
is a family of $n \times d$ integer matrices, $d \geq n$, with bounded sup-norm
and the property that no $\ell$ column vectors are linearly dependent, $\ell
\leq n$. Further, if $\ell \leq o(\log n)$ then $d/n \to \infty$ as $n \to
\infty$. Our construction comes from particular sets of difference vectors of
point-sets in $\mathbb R^n$ that cannot be covered by few parallel hyperplanes.
We construct examples of such sets on the $0, \pm 1$ grid and use them for the
matrix construction. We also show a connection of our constructions to a simple
version of the Tarski plank problem.
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The results of a search for sub-km Kuiper Belt Objects (KBOs) with the method
of serendipitous stellar occultations are reported. Photometric time series
were obtained on the 1.8m telescope at the Dominion Astrophysical Observatory
(DAO) in Victoria, BC, and were analyzed for the presence of occultation
events. Observations were performed at 40 Hz and included a total of 5.0
star-hours for target stars in the ecliptic open cluster M35 (beta=0.9deg), and
2.1 star-hours for control stars in the off-ecliptic open cluster M34
(beta=25.7deg). To evaluate the recovery fraction of the analysis method, and
thereby determine the limiting detectable size, artificial occultation events
were added to simulated time series (1/f scintillation-like power-spectra), and
to the real data. No viable candidate occultation events were detected. This
limits the cumulative surface density of KBOs to 3.5e10 deg^{-2} (95%
confidence) for KBOs brighter than m_R=35.3 (larger than ~860m in diameter,
assuming a geometric albedo of 0.04 and a distance of 40 AU). An evaluation of
TNO occultations reported in the literature suggests that they are unlikely to
be genuine, and an overall 95%-confidence upper limit on the surface density of
2.8e9 deg^{-2} is obtained for KBOs brighter than m_R=35 (larger than ~1 km in
diameter, assuming a geometric albedo of 0.04 and a distance of 40 AU) when all
existing surveys are combined.
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Worth the read as it's a great story and page turner
I like much from Follett and this didn't disappoint. However I found it odd that he would repeat information we already knew as readers frequently. Yes, Ken, I already know that X person hates Y person, you don't need to keep reminding me 😉
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The LASSO is an attractive regularisation method for linear regression that
combines variable selection with an efficient computation procedure. This paper
is concerned with enhancing the performance of LASSO for square-free
hierarchical polynomial models when combining validation error with a measure
of model complexity. The measure of the complexity is the sum of Betti numbers
of the model which is seen as a simplicial complex, and we describe the model
in terms of components and cycles, borrowing from recent developments in
computational topology. We study and propose an algorithm which combines
statistical and topological criteria. This compound criterion would allow us to
deal with model selection problems in polynomial regression models containing
higher-order interactions. Simulation results demonstrate that the compound
criteria produce sparser models with lower prediction errors than the
estimators of several other statistical methods for higher order interaction
models.
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“To them, Bears Ears is more than a recreation destination, it is sacred ground rich in cultural and historical significance,” the statement reads. “With its abundant natural resources — including wood to warm homes in the winter — many Native Americans depend on this land not only for spiritual nourishment, but also for their very survival.”
So some paleface congressmen know what Native Americans need better than the Native Americans? After 500 years of genocide and exploitation, the cycle continues.
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I’ve never understood the puffy, sweaty guys who have their tie half- loosened, by 10:15 AM.
That ‘look’ is for police dramas taking place at 11:30PM, near the end of two homicides, 4 armed robberies, 7 cases of aggravated assault and 6 hours of overtime
If a tie is causing you grief, don’t wear one in the first place...
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Light power spectra are introduced as a new tool for relative light yield
(LY) determinations. Light event spectra have commonly been used for this
purpose. Theoretical background supporting this change is provided. It is shown
that the derivative of a light power spectrum can provide a reliable LY
measurement at levels as low as 2% of those for high-yield liquid
scintillators. Applications to light evolution in the PPO+LAB system and to
water-based liquid scintillators are described.
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I have a piece of advice for the people who made this movie too, if you're gonna make a movie like this be sure you got the f/x to back it up. Also don't get a bunch of z list actors to play in it. Another thing, just about all of us have seen Jurassic Park, so don't blatantly copy it. All in all this movie sucked, f/x sucked, acting sucked, story unoriginal. Let's talk about the acting for just a second, the Carradine guy who's career peaked in 1984 when he did "Revenge of the Nerds" (which was actually a great comedy). He's not exactly z list, he can act. He just should have said no to this s--t bag. He should have did what Mark Hamill did after "Return of the Jedi" and go quietly into the night. He made his mark as a "Nerd" and that should have been that. I understand he has bills to pay, but that hardly excuses this s--t bag. Have I called this movie that yet? O.K. I just wanted to be sure. If I sound a little hostile, I apologize. I just wasted 2hrs of my life I could have spent doing something productive like watching paint peel, and I feel cheated. I'll close on that note. Thank you for your time.
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Something is different...
Their quality has definitely suffered since the last time I purchased these. They tear when removing the label from the backing, and the printer can no longer print just a single label (after the first label was already used) without it tearing or coming out crooked, as the backing material is too flimsy. I cannot recommend these at all.
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We propose the class of uniformly convex $W$-hyperbolic spaces with monotone
modulus of uniform convexity ($UCW$-hyperbolic spaces for short) as an
appropriate setting for the study of nonexpansive iterations. $UCW$-hyperbolic
spaces are a natural generalization both of uniformly convex normed spaces and
CAT(0)-spaces. Furthermore, we apply proof mining techniques to get effective
rates of asymptotic regularity for Ishikawa iterations of nonexpansive
self-mappings of closed convex subsets in $UCW$-hyperbolic spaces. These
effective results are new even for uniformly convex Banach spaces.
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Anonymity revocation is an essential component of credential issuing systems
since unconditional anonymity is incompatible with pursuing and sanctioning
credential misuse. However, current anonymity revocation approaches have
shortcomings with respect to the auditability of the revocation process. In
this paper, we propose a novel anonymity revocation approach based on
privacy-preserving blockchain-based smart contracts, where the code
self-execution property ensures availability and public ledger immutability
provides auditability. We describe an instantiation of this approach, provide
an implementation thereof and conduct a series of evaluations in terms of
running time, gas cost and latency. The results show that our scheme is
feasible and efficient.
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We report a measurement of the spin polarisation of the recoiling neutron in
deuterium photodisintegration, utilising a new large acceptance polarimeter
within the Crystal Ball at MAMI. The measured photon energy range of
300~--~700~MeV provides the first measurement of recoil neutron polarisation at
photon energies where the quark substructure of the deuteron plays a role,
thereby providing important new constraints on photodisintegration mechanisms.
A very high neutron polarisation in a narrow structure centred around
$E_{\gamma}\sim$~570~MeV is observed, which is inconsistent with current
theoretical predictions employing nucleon resonance degrees of freedom. A
Legendre polynomial decomposition suggests this behaviour could be related to
the excitation of the $d^*(2380)$ hexaquark.
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The screening of baggage using X-ray scanners is now routine in aviation
security with automatic threat detection approaches, based on 3D X-ray computed
tomography (CT) images, known as Automatic Threat Recognition (ATR) within the
aviation security industry. These current strategies use pre-defined threat
material signatures in contrast to adaptability towards new and emerging threat
signatures. To address this issue, the concept of adaptive automatic threat
recognition (AATR) was proposed in previous work. In this paper, we present a
solution to AATR based on such X-ray CT baggage scan imagery. This aims to
address the issues of rapidly evolving threat signatures within the screening
requirements. Ideally, the detection algorithms deployed within the security
scanners should be readily adaptable to different situations with varying
requirements of threat characteristics (e.g., threat material, physical
properties of objects). We tackle this issue using a novel adaptive machine
learning methodology with our solution consisting of a multi-scale 3D CT image
segmentation algorithm, a multi-class support vector machine (SVM) classifier
for object material recognition and a strategy to enable the adaptability of
our approach. Experiments are conducted on both open and sequestered 3D CT
baggage image datasets specifically collected for the AATR study. Our proposed
approach performs well on both recognition and adaptation. Overall our approach
can achieve the probability of detection around 90% with a probability of false
alarm below 20%. Our AATR shows the capabilities of adapting to varying types
of materials, even the unknown materials which are not available in the
training data, adapting to varying required probability of detection and
adapting to varying scales of the threat object.
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We construct tilting modules over Jacobian algebras arising from knots. To a
two-bridge knot $L[a_1,\ldots,a_n]$, we associate a quiver $Q$ with potential
and its Jacobian algebra $A$. We construct a family of canonical indecomposable
$A$-modules $M(i)$, each supported on a different specific subquiver $Q(i)$ of
$Q$. Each of the $M(i)$ is expected to parametrize the Jones polynomial of the
knot. We study the direct sum $M=\oplus_iM(i)$ of these indecomposables inside
the module category of $A$ as well as in the cluster category.
In this paper we consider the special case where the two-bridge knot is given
by two parameters $a_1,a_2$. We show that the module $M$ is rigid and
$\tau$-rigid, and we construct a completion of $M$ to a tilting (and
$\tau$-tilting) $A$-module $T$. We show that the endomorphism algebra
$\operatorname{End}_AT$ of $T$ is isomorphic to $A$, and that the mapping
$T\mapsto A[1]$ induces a cluster automorphism of the cluster algebra
$\mathcal{A}(Q)$. This automorphism is of order two. Moreover, we give a
mutation sequence that realizes the cluster automorphism. In particular, we
show that the quiver $Q$ is mutation equivalent to an acyclic quiver of type
$T_{p,q,r}$ (a tree with three branches). This quiver is of finite type if
$(a_1,a_2)=(a_1,2), (1,a_2),$ or $(2,3)$, it is tame for $(a_1,a_2)=(2,4)$ or
$(3,3)$, and wild otherwise.
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Surface wave tomography uses measured dispersion properties of surface waves
to infer the spatial distribution of subsurface properties such as shear-wave
velocities. These properties can be estimated vertically below any geographical
location at which surface wave dispersion data are available. As the inversion
is significantly non-linear, Monte Carlo methods are often used to invert
dispersion curves for shear-wave velocity profiles with depth to give a
probabilistic solution. Such methods provide uncertainty information but are
computationally expensive. Neural network based inversion provides a more
efficient way to obtain probabilistic solutions when those solutions are
required beneath many geographical locations. Unlike Monte Carlo methods, once
a network has been trained it can be applied rapidly to perform any number of
inversions. We train a class of neural networks called mixture density
networks, to invert dispersion curves for shear-wave velocity models and their
non-linearised uncertainty. Mixture density networks are able to produce fully
probabilistic solutions in the form of weighted sums of multivariate analytic
kernels such as Gaussians, and we show that including data uncertainties in the
mixture density network gives more reliable mean velocity estimates when data
contains significant noise. The networks were applied to data from the Grane
field in the Norwegian North sea to produce shear-wave velocity maps at several
depth levels. Post-training we obtained probabilistic velocity profiles with
depth beneath 26,772 locations to produce a 3D velocity model in 21 seconds on
a standard desktop computer. This method is therefore ideally suited for rapid,
repeated 3D subsurface imaging and monitoring.
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The deterministic rotation of a ferromagnetic nanoparticle in a fluid is
considered. The heating arising from viscous friction of a nanoparticle driven
by circularly and linearly polarized alternating magnetic fields is
investigated. Since the power loss of such fields depends on the character of
the induced motion of a nanoparticle, all types of particle trajectories are
described in detail. The dependencies of the power loss on the alternating
field parameters are determined. The optimal conditions for obtaining the
maximum heating efficiency are discussed. The effect of heating enhancement by
a static field is analyzed. The results obtained are actual for the description
of heating in the magnetic fluid hyperthermia cancer treatment, when the size
of the particles used is a few tens of nanometers.
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Big difference. PCs are fiscally conservative who believe in balanced budgets outside recessions, believe in spending what is necessary for a civil society but nothing more, and having competitive taxes with other developed countries. Liberals (at least the Trudeau/Wynne types) believe it is okay to run perpetual deficits, we should dramatically increase spending and the economy will take off without looking at its effectiveness, and that our tax rates can be one of the highest on earth without any brain drain or negative reprecussions on economic growth. PC's aren't nativist, believe socially conservative issues are dead, and not libertarians (otherwise slightly less government, not radically less).
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We present a follow-up analysis of the unique magnetic luminosity-variable
carbon-atmosphere white dwarf SDSS J142625.71+575218.3. This includes the
results of some 106.4 h of integrated light photometry which have revealed,
among other things, the presence of a new periodicity at 319.720 s which is not
harmonically related to the dominant oscillation (417.707 s) previously known
in that star. Using our photometry and available spectroscopy, we consider the
suggestion made by Montgomery et al. (2008) that the luminosity variations in
SDSS J142625.71+575218.3 may not be caused by pulsational instabilities, but
rather by photometric activity in a carbon-transferring analog of AM CVn. This
includes a detailed search for possible radial velocity variations due to rapid
orbital motion on the basis of MMT spectroscopy. At the end of the exercise, we
unequivocally rule out the interacting binary hypothesis and conclude instead
that, indeed, the luminosity variations are caused by g-mode pulsations as in
other pulsating white dwarfs. This is in line with the preferred possibility
put forward by Montgomery et al. (2008).
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Motivated by the recent experimental observation of exclusive chi_c events at
the Tevatron, we revisit earlier studies of central exclusive scalar chi_c0
meson production, before generalising the existing formalism to include chi_c1
and chi_c2 mesons. Although chi_c0 production was previously assumed to be
dominant, we find that the chi_c1 and chi_c2 rates for the experimentally
considered chi_c -> J/psi gamma -> mu+ mu- gamma decay process are in fact
comparable to the chi_c0 rate. We have developed a new Monte Carlo event
generator, SuperCHIC, which models the central exclusive production of the
three chi_c states via this decay chain, and have explored possible ways of
distinguishing them, given that their mass differences are not resolvable
within the current experimental set-up. Although we find that the severity of
current experimental cuts appears to preclude this, the acceptance does not
change crucially between the three states and so our conclusions regarding the
overall rates remain unchanged. This therefore raises the interesting
possibility that exclusive chi_c1 and chi_c2 production has already been
observed at the Tevatron.
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String theory has been initially derived from motivations coming from strong
interaction phenomenology,but its application faced deep conceptual and
practical difficulties. The strong interactions found their theoretical
foundation elsewhere, namely on QCD, the quantum gauge field theory of quarks
and gluons. Recently, the Gauge/Gravity correspondence allowed to initiate a
reformulation of the connection between strings and gauge field theories,
avoiding some of the initial drawbacks and opening the way to new insights on
the gauge theory at strong coupling and eventually QCD. Among others, the
recent applications of the Gauge/Gravity correspondence to the formation of the
QGP, the quark-gluon plasma, in heavy-ion reactions seem to provide a
physically interesting insight on phenomenological features of the reactions.
In these lectures we will give a simplified introduction to those aspects of
string theory which, at the origin and in the recent developments, are
connected to strong interactions, for those students which are starting to
learn QCD and QGP physics from an experimental or phenomenological point of
view.
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In this paper, we investigate the entanglement entropy of the rotating BTZ
black hole perturbed by a massive back-reacting free falling particle. Then,
mutual information between two finite intervals in two asymptotic regions of
rotating BTZ is derived. It allows us to find the scrambling time, the time
scale in which mutual information vanishes. We give a dual large $c$ CFT
description in terms of a thermofield double state with different temperatures
for left and right moving modes that is perturbed by a local operator. Exact
matching between gravity and CFT results is obtained.
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The Geant4-DNA project proposes to develop an open-source simulation software
based and fully included in the general-purpose Geant4 Monte Carlo simulation
toolkit. The main objective of this software is to simulate biological damages
induced by ionising radiation at the cellular and sub-cellular scale. This
project was originally initiated by the European Space Agency for the
prediction of deleterious effects of radiation that may affect astronauts
during future long duration space exploration missions. In this paper, the
Geant4-DNA collaboration presents an overview of the whole ongoing project,
including its most recent developments already available in the last Geant4
public release (9.3 BETA), as well as an illustration example simulating the
direct irradiation of a chromatin fibre. Expected extensions involving several
research domains, such as particle physics, chemistry and cellular and
molecular biology, within a fully interdiciplinary activity of the Geant4
collaboration are also discussed.
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We initiate the study of a duality theory which applies to norm inequalities
for pointwise weighted geometric means of positive operators. The theory finds
its expression in terms of certain pointwise factorisation properties of
function spaces which are naturally associated to the norm inequality under
consideration. We relate our theory to the Maurey-Nikisin-Stein theory of
factorisation of operators, and present a fully multilinear version of Maurey's
fundamental theorem on factorisation of operators through $L^1$. The
development of the theory involves convex optimisation and minimax theory,
functional-analytic considerations concerning the dual of $L^\infty$, and the
Yosida-Hewitt theory of finitely additive measures. We consider the connections
of the theory with the theory of interpolation of operators. We discuss the
ramifications of the theory in the context of concrete families of geometric
inequalities, including Loomis-Whitney inequalities, Brascamp-Lieb inequalities
and multilinear Kakeya inequalities.
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{\em The Liouville number}, denoted $l$, is defined by
$$l:=0.100101011101101111100...,$$ where the $n$th bit is given by
${1/2}(1+\gl(n))$; here $\gl$ is the Liouville function for the parity of prime
divisors of $n$. Presumably the Liouville number is transcendental, though at
present, a proof is unattainable. Similarly, define {\em the Gaussian Liouville
number} by $$\gamma:=0.110110011100100111011...$$ where the $n$th bit reflects
the parity of the number of rational Gaussian primes dividing $n$, 1 for even
and 0 for odd.
In this paper, we prove that the Gaussian Liouville number and its relatives
are transcendental. One such relative is the number
$$\sum_{k=0}^\infty\frac{2^{3^k}}{2^{3^k2}+2^{3^k}+1}=0.101100101101100100101...,$$
where the $n$th bit is determined by the parity of the number of prime divisors
that are equivalent to 2 modulo 3.
We use methods similar to that of Dekking's proof of the transcendence of the
Thue--Morse number \cite{Dek1} as well as a theorem of Mahler's \cite{Mahl1}.
(For completeness we provide proofs of all needed results.) This method
involves proving the transcendence of formal power series arising as generating
functions of completely multiplicative functions.
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We consider a family of determinantal random point processes on the
two-dimensional lattice and prove that members of our family can be interpreted
as a kind of Gibbs ensembles of nonintersecting paths. Examples include
probability measures on lozenge and domino tilings of the plane, some of which
are non-translation-invariant.
The correlation kernels of our processes can be viewed as extensions of the
discrete sine kernel, and we show that the Gibbs property is a consequence of
simple linear relations satisfied by these kernels. The processes depend on
infinitely many parameters, which are closely related to parametrization of
totally positive Toeplitz matrices.
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Works as Advertised
After reading all the review on oil painting cleaners, I chose this product. You need to be both careful and patient as you clean and restore, and you must have good ventilation. However, the system did brighten an old oil painting, and I am please with the results. The difference is subtle, but it was definitely worthwhile to do!
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The green purse hook came broken, which was fixed ...
The green purse hook came broken, which was fixed with hot glue, and the pink hook is more purple, and crooked. I bought these to use as stocking hangers, since we do not have a mantle. They work okay, they just slide around a lot.
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I liked the movie but it should have been longer. The actors did a great job. Portia De Rossi is a fabulous actress and Kristoffer Polaha is a hottie. He didn't look like John at 100% but he did favor him from a distance. I look forward to seeing more of him on the big screen. He didn't have john's charisma, but he definitely has a charm about himself. He has beautiful eyes and a great smile. He reminds me of my boyfriend alot. Ms. Bissett was just too breathy for me. She should have that asthma checked out. Im not going to comment on the Darryl Hannah character. My mom always said, "If ya can't say anything nice, then shut the hell up!" so that's what Im gonna do.<br /><br />Molly
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One Manhattan Square, is a residential skyscraper project being developed by Extell Development Company in Two Bridges, Manhattan, New York City, completed, the building will stand out significantly within the context of the neighborhood, the next highest structure being which suspension bridge that crosses the East River in New York City, connecting Lower Manhattan at Canal Street with Downtown Brooklyn at the Flatbush Avenue Extension, at roughly 30 stories in height?
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We analyze the finite size corrections to entanglement in quantum critical
systems. By using conformal symmetry and density functional theory, we discuss
the structure of the finite size contributions to a general measure of ground
state entanglement, which are ruled by the central charge of the underlying
conformal field theory. More generally, we show that all conformal towers
formed by an infinite number of excited states (as the size of the system $L
\to \infty$) exhibit a unique pattern of entanglement, which differ only at
leading order $(1/L)^2$. In this case, entanglement is also shown to obey a
universal structure, given by the anomalous dimensions of the primary operators
of the theory. As an illustration, we discuss the behavior of pairwise
entanglement for the eigenspectrum of the spin-1/2 XXZ chain with an arbitrary
length $L$ for both periodic and twisted boundary conditions.
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We present numerical N-body simulation studies of large-scale structure
formation. The main purpose of these studies is to analyze the several models
of dark matter and the role they played in the process of large-scale structure
formation. We analyze in this work a flat cold dark matter dominated model
known as the Santa Barbara cluster. We compare the results for this model using
the standard Newtonian limit of general relativity with the corresponding
results of using the Newtonian limit of scalar-tensor theories. An specific
model is the one that considers that the scalar field is non-minimally coupled
to the Ricci scalar in the Einstein-Hilbert Lagrangian. Comparisons of the
models are done showing results of rotation curves, density profiles, and
velocity dispersions for halos formed at z=0. We analyze, in particular, the
Santa Barbara cluster and its possible equation of state.
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We explore the notion of spatial extent and structure, already alluded to in
earlier literature, within the formulation of quantum mechanics on the
noncommutative plane. Introducing the notion of average position and its
measurement, we find two equivalent pictures: a constrained local description
in position containing additional degrees of freedom, and an unconstrained
nonlocal description in terms of the position without any other degrees of
freedom. Both these descriptions have a corresponding classical theory which
shows that the concept of extended, structured objects emerges quite naturally
and unavoidably there. It is explicitly demonstrated that the conserved energy
and angular momentum contain corrections to those of a point particle. We argue
that these notions also extend naturally to the quantum level. The local
description is found to be the most convenient as it manifestly displays
additional information about structure of quantum states that is more subtly
encoded in the nonlocal, unconstrained description. Subsequently we use this
picture to discuss the free particle and harmonic oscillator as examples.
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Studies have shown that there are three main reasons for Canadian graduates leaving Canada for the US:
1. More opportunities in their field of study
2. More money
3. More opportunities in general
If employers want to hire top notch Canadians then they need to offer salaries and jobs that are competitive with the US.
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The paper presents an extension and a refinement of our previous work on the
extraction of the doubly virtual forward Compton scattering amplitude on the
lattice by using the background field technique, Phys. Rev. D 95, 031502 (2017)
(arXiv:1610.05545). The zero frequency limit for the periodic background field
is discussed, in which the well-known result is reproduced. Further, an upper
limit for the magnitude of the external field is established for which the
perturbative treatment is still possible. Finally, the framework is set for the
evaluation of the finite-volume corrections allowing for the analysis of
upcoming lattice results.
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Skip McCoy is a three time loser pick pocket, unable to curb his instincts back on the street, he picks the purse of Candy on a subway train. What he doesn't realise is that Candy is carrying top secret microfilm, microfilm that is of high interest to many many organisations.<br /><br />Director Samuel Fuller has crafted an exceptional drama set amongst the seedy underworld of New York City. Communist spies and shady government operatives all blend together to make Pickup On South Street a riveting viewing from first minute to the last. Based around a Dwight Taylor story called Blaze Of Glory, Fuller enthused this adaptation with heavy set political agenda, something that many at the time felt was over done, but to only focus on its anti communist leanings is doing it a big disservice.<br /><br />Digging a little deeper and you find characters as intriguing as any that Fuller has directed, the main protagonist for one is the hero of the piece, a crook and a shallow human being, his heroics are not born out of love for his country, they are born out of his sheer stubborn streak. It's quite an achievement that Fuller has crafted one of the best anti heroes of the 50s, and i'm sure he was most grateful to the performance of Richard Widmark as McCoy, all grin and icy cold heart, his interplay with the wonderful Jean Peters as Candy is excellent, and is the films heart. However it is the Oscar nominated Thelma Ritter who takes the acting honours, her Moe is strong and as seedy as the surrounding characters, but there is a tired warmth to her that Ritter conveys majestically.<br /><br />It's a B movie in texture but an A film in execution, Pickup On South Street is a real classy and entertaining film that is the best of its most intriguing director. 9/10
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A traversal of a connected graph is a linear ordering of its vertices all of
whose initial segments induce connected subgraphs. Traversals, and their
refinements such as breadth-first and depth-first traversals, are computed by
various graph searching algorithms. We extend the theory of generic search and
breadth-first search from finite graphs to wellordered infinite graphs,
recovering the notion of "search trees" in this context. We also prove tight
upper bounds on the extent to which graph search and breadth-first search can
modify the order type of the original graph, as well as characterize the
traversals computed by these algorithms as lexicographically minimal.
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Had no idea this could rip paint off the wall.
Ripped paint off the wall. Had no idea this could happen. Put plenty on to more than hold the picture per instructions. Came in the next day to find picture hanging by one hook and other hook and paint torn off the wall.
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Brans-Dicke (BD) cosmology is reconsidered from an approach in which the
model can be formulated in $\Lambda$CDM form, but at the expense of replacing
the rigid cosmological constant $\Lambda$ with a dynamical quasivacuum
component which depends on a small parameter $\epsilon$. The product of
$\epsilon$ times the BD-parameter $\omega_{\rm BD}$ becomes exactly determined
in terms of the ordinary cosmological parameters. The GR limit is recovered for
$\omega_{\rm BD}\to\infty$ when $\epsilon\to 0$. We solve the background
cosmology of the model as well as the perturbations equations. When fitted to
the cosmological data, we find that the BD-cosmology, transcribed in such an
effective GR form, appears to be competitive with the $\Lambda$CDM and emulates
the running vacuum model.
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The optical response of superconductors with odd-frequency Berezinskii
pairing is studied. By using a simple model with a parabolic dispersion law and
a non-magnetic disorder, the spectral function, the electron density of states,
and the optical conductivity are calculated for a few gap ansatzes. The
spectral function and the electron density of states clearly reveal the gap for
the Berezinskii pairing for the sufficiently strong frequency dependence of the
order parameters. It is found that, similarly to the conventional BCS pairing,
the odd-frequency gaps induce peaks in the real part of the conductivity,
which, however, are sharper than in the BCS case. The magnitude and position of
these peaks are determined by the frequency profile of the gap. The imaginary
part of the optical conductivity for the Berezinskii pairing demonstrates sharp
cusps that are absent in the case of the BCS superconductors. The corresponding
results suggest that the Berezinskii pairing might allow for the optical
transparency windows related to the onsets of the attenuation peaks in the real
part of the conductivity. Thus, the study of the optical response not only
provides an alternative way to probe the odd-frequency gaps but can reveal also
additional features of the dynamic superconducting pairing.
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A ferromagnetic Josephson junction with a spin-flipper (magnetic impurity)
sandwiched in-between acts as a phase battery that can store quantized amounts
of superconducting phase difference $\Phi_0$ in the ground state of the
junction. Moreover, for such $\Phi_0$-Josephson junction anomalous Josephson
current appears at zero phase difference. We study the properties of this
quantum spin-flip scattering induced anomalous Josephson current, especially
its tun-ability via misorientation angle between two Ferromagnets.
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[abridged] Previous analyses of lithium abundances in main sequence and red
giant stars have revealed the action of mixing mechanisms other than convection
in stellar interiors. Beryllium abundances in stars with lithium abundance
determinations can offer valuable complementary information on the nature of
these mechanisms. Our aim is to derive beryllium abundances along the whole
evolutionary sequence of an open cluster, IC 4651. These Be abundances are used
together with previously determined Li abundances, in the same sample stars, to
investigate the mixing mechanisms in a range of stellar masses and evolutionary
stages. New beryllium abundances are determined from high-resolution, high
signal-to-noise UVES spectra using spectrum synthesis and model atmospheres.
The careful synthetic modelling of the Be lines region is used to calculate
reliable abundances in rapidly rotating stars. The observed behavior of Be and
Li is compared to theoretical predictions from stellar models including
rotation-induced mixing, internal gravity waves, atomic diffusion, and
thermohaline mixing. Beryllium is detected in all the main sequence and
turn-off sample stars, both slow- and fast-rotating stars, including the Li-dip
stars, but was not detected in the red giants. Confirming previous results, we
find that the Li dip is also a Be dip, although the depletion of Be is more
modest than that of Li in the corresponding effective temperature range. For
post-main-sequence stars, the Be dilution starts earlier within the Hertzsprung
gap than expected from classical predictions as does the Li dilution. A clear
dispersion in the Be abundances is also observed. Theoretical stellar models
including the hydrodynamical transport processes mentioned above are able to
reproduce well all the observed features.
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Are they the ones killing gays, children or running over people ??
I thank the lord their are people like Nigel Farage discussing many uncomfortable issue facing humanity.
Being a left winger and having socialist ideals is healthy for society but what we are seeing now from the left is distributing and grossly misguided. .
Soaring energy cost, massive debts, insane housing cost and complete destabilization of Western values.
==
Nigel Farage speech to mainstream media leaves them in stunned silence !!!!
https://www.youtube.com/watch?v=3qPy051z_PE
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Wave propagation phenomena in soils can be experimentally simulated using
centrifuge scale models. An original excitation device (drop-ball arrangement)
is proposed to generate short wave trains. Wave reflections on model boundaries
are taken into account and removed by homomorphic filtering. Propagation is
investigated through dispersion laws. For drop-ball experiments, spherical wave
field analysis assuming linear viscoelasticity leads to a complete analytical
description of wave propagation. Damping phenomena are examined and evaluated
using this description.
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We derive new existence results for tight contact structures on certain
3-manifolds which can be presented as surgery along specific knots in S^3.
Indeed, we extend our earlier results on knots with maximal Thurston-Bennequin
number being equal to 2g-1 to knots for which the maximal self-linking number
satisfies the same equality. In the argument (using contact surgery) we define
an invariant for transverse knots in contact 3-manifolds under the assumption
that either the knot is null-homologous or the 3-manifold has no S^1xS^2-factor
in its prime decomposition, and we study its properties using the Ozsvath-Szabo
contact invariant.
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Following Georgi's unparticle scheme, we examine the effective couplings
between neutrinos and unparticle operators. As an immediate consequence,
neutrinos become unstable and can decay into the unparticle stuff. Assuming the
dimension transmutation scale is around $\Lambda^{}_{\cal U} \sim 1 ~{\rm
TeV}$, we implement the cosmological limit on the neutrino lifetime to
constrain the neutrino-unparticle couplings for different scaling dimensions
$d$. In addition, provided that the electron-unparticle coupling is restricted
due to the precise measurement of the anomalous magnetic moment of electron, we
calculate the unparticle contribution to the neutrino-electron elastic
scattering. It is more important to jointly deal with the couplings of the
unparticle to the standard model particles rather than separately. Taking into
account both electron- and neutrino-unparticle couplings, we find that the
scaling dimension of the scalar unparticle should lie in the narrow range $1 <
d < 2$ by requiring the observables to be physically meaningful. However, there
is no consistent range of $d$ for the vector unparticle operator.
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This paper presents the METAL project, an ongoing French open Learning
Analytics (LA) project for secondary school, that aims at improving the quality
of the learning process. The originality of METAL is that it relies on research
through exploratory activities and focuses on all the aspects of a Learning
Analytics implementation. This large-scale project includes many concerns,
divided into 4 main actions. (1) data management: multi-source data
identification, collection and storage, selection and promotion of standards,
and design and development of an open-source Learning Record Store (LRS); (2)
data visualization: learner and teacher dashboards, with a design that relies
on the co-conception with final users, including trust and usability concerns;
(3) data exploitation: study of the link between gaze and memory of learners,
design of explainable multi-source data-mining algorithms, including ethics and
privacy concerns. An additional key of originality lies in the global
dissemination of LA at an institution level or at a broader level such as a
territory, at the opposite on many projects that focus on a specific school or
a school curriculum. Each of these aspects is a hot topic in the literature.
Taking into account all of them in a holistic view of education is an
additional added value of the project.
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A semiregular tree is a tree where all non-pendant vertices have the same
degree. Belardo et al. (MATCH Commun. Math. Chem. 61(2), pp. 503-515, 2009)
have shown that among all semiregular trees with a fixed order and degree, a
graph with index is a caterpillar. In this technical report we provide a
different proof for this theorem. Furthermore, we give counter examples that
show this result cannot be generalized to the class of trees with a given
(non-constant) degree sequence.
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Generalizing the results of Maurischat in \cite{Maurischatxx}, we show that
the field $K_{\infty}(\Lambda)$ of periods of a Drinfeld module $\phi$ of rank
$r$ defined over $K_{\infty} = \mathds{F}_{q}((T^{-1}))$ may be arbitrarily
large over $K_{\infty}$.
We also show that, in contrast, the residue class degree $f(
K_{\infty}(\Lambda) | K_{\infty})$ remains bounded by a constant that depends
only on $r$.
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We present g-z color and z-band surface brightness fluctuations (SBF)
measurements for 43 early-type galaxies in the Fornax cluster imaged with
HST/ACS. These are combined with measurements for Virgo cluster galaxies to
derive a revised, nonlinear calibration of the z-band SBF absolute magnitude as
a function of g-z. In all, we tabulate recalibrated SBF distances for 134
galaxies in Virgo, Fornax, the Virgo W' group, and NGC4697 in the Virgo
Southern Extension. The calibration procedure yields a precise relative
distance modulus for Fornax with respect to Virgo of 0.42+/-0.03 mag, or a
distance ratio 1.214 +/- 0.017. The resulting Fornax distance modulus is 31.51
+/-0.03 +/-0.15 mag, 20.0 +/-0.3 +/-1.4 Mpc, where the second set of error bars
reflects systematic uncertainty from our assumed Virgo distance of 16.5 Mpc.
The rms distance scatter for the early-type Fornax galaxies is
0.49^{+0.11}_{-0.15} Mpc, consistent with its compact appearance on the sky.
This translates to a depth scatter smaller than the intrinsic, or "cosmic",
scatter sigma_cosmic in the SBF calibration, unlike in Virgo. As a result, we
are able to place the first tight constraints on the value of sigma_cosmic,
finding 0.06 +/- 0.01 mag, with a firm upper limit of sigma_cosmic<0.08 mag, at
least for galaxies with g-z>1.02. We also present an alternative SBF
calibration based on the `fluctuation count' parameter Nbar, a proxy for galaxy
mass, which gives a consistent relative distance. Finally, we find no evidence
for systematic trends of the galaxy distances with position or velocity (e.g.,
no current infall); the Fornax cluster appears both compact and well
virialized.[abridged]
|
We demonstrate the all-optical ultrafast manipulation and read-out of optical
transitions in a single negatively charged self-assembled InAs quantum dot, an
important step towards ultrafast control of the resident spin. Experiments
performed at zero magnetic field show the excitation and decay of the trion
(negatively charged exciton) as well as Rabi oscillations between the electron
and trion states. Application of a DC magnetic field perpendicular to the
growth axis of the dot enables observation of a complex quantum beat structure
produced by independent precession of the ground state electron and the excited
state heavy hole spins.
|
"Yeselson ends his futile attempt to defend unions by bringing out the classic trope: “Unions, as the old saying goes, the folks who brought you the weekend.” This is nothing but an elementary school myth. A bunch of greasy-haired petition-gatherers didn’t create the weekend. Capital accumulation and rising productivity make it possible for people to take off work at the end of the week. Otherwise, the drop in commercial activity would render a business unprofitable, and thus unable to keep the lights on. This has always been the great secret behind unionist fiction."
|
We review the general quantization of scalar fields in curved space-times in
the Schroedinger formalism and discuss the determination of the ground-state.
By explicitly computing the norm of the ground-state wave functional, we give
an argument for the instability of the ground-state of a QFT in a
semi-classical space-time of Bianchi-type I. We find that this norm is, in
general, time-dependent, and conclude that the ground-state evolution is not
unitary.
|
Typically, autonomous cars optimize for a combination of safety, efficiency,
and driving quality. But as we get better at this optimization, we start seeing
behavior go from too conservative to too aggressive. The car's behavior exposes
the incentives we provide in its cost function. In this work, we argue for cars
that are not optimizing a purely selfish cost, but also try to be courteous to
other interactive drivers. We formalize courtesy as a term in the objective
that measures the increase in another driver's cost induced by the autonomous
car's behavior. Such a courtesy term enables the robot car to be aware of
possible irrationality of the human behavior, and plan accordingly. We analyze
the effect of courtesy in a variety of scenarios. We find, for example, that
courteous robot cars leave more space when merging in front of a human driver.
Moreover, we find that such a courtesy term can help explain real human driver
behavior on the NGSIM dataset.
|
Linear data-detection algorithms that build on zero forcing (ZF) or linear
minimum mean-square error (L-MMSE) equalization achieve near-optimal spectral
efficiency in massive multi-user multiple-input multiple-output (MU-MIMO)
systems. Such algorithms, however, typically rely on centralized processing at
the base-station (BS) which results in (i) excessive interconnect and chip
input/output (I/O) data rates and (ii) high computational complexity.
Decentralized baseband processing (DBP) partitions the BS antenna array into
independent clusters that are associated with separate radio-frequency
circuitry and computing fabrics in order to overcome the limitations of
centralized processing. In this paper, we investigate decentralized
equalization with feedforward architectures that minimize the latency
bottlenecks of existing DBP solutions. We propose two distinct architectures
with different interconnect and I/O bandwidth requirements that fuse the local
equalization results of each cluster in a feedforward network. For both
architectures, we consider maximum ratio combining, ZF, L-MMSE, and a nonlinear
equalization algorithm that relies on approximate message passing, and we
analyze the associated post-equalization signal-to-noise-and-interference-ratio
(SINR). We provide reference implementation results on a multi graphics
processing unit (GPU) system which demonstrate that decentralized equalization
with feedforward architectures enables throughputs in the Gb/s regime and
incurs no or only a small performance loss compared to centralized solutions.
|
1st picture does not match dress delivered
If you look at this dress's first picture you expect a lovely very long dress but if you flip to other pictures you notice its complete trash and they send you the dress that's trash. My point is don't be a dolt and read reviews first and dont trust impossibly cheap prices like I did
|
I present an overview of important results obtained using high-resolution
very long baseline interferometry (VLBI) observations of X-ray binary systems.
These results derive from both astrometric observations and resolved imaging of
sources, from black holes to neutron star and even white dwarf systems. I
outline a number of upcoming developments in instrumentation, both new
facilities and ongoing upgrades to existing VLBI instruments, and I conclude by
identifying a number of important areas of investigation where VLBI will be
crucial in advancing our understanding of X-ray binaries.
|
We present an algorithmic framework for a variant of the quantum Monte Carlo
operator-loop algorithm, where non-local cluster updates are constructed in a
way that makes each individual loop smaller. The algorithm is designed to
increase simulation efficiency in cases where conventional loops become very
large, do not close altogether, or otherwise behave poorly. We demonstrate and
characterize some aspects of the short-loop on a square lattice spin-1/2 XXZ
model where, remarkably, a significant increase in simulation efficiency is
observed in some parameter regimes. The simplicity of the model provides a
prototype for the use of short-loops on more complicated quantum systems.
|
Nitrogen-vacancy (NV) quantum defects in diamond are sensitive detectors of
magnetic fields. Due to their atomic size and optical readout capability, they
have been used for magnetic resonance spectroscopy of nanoscale samples on
diamond surfaces. Here we present a protocol for fabricating NV-diamond chips
and for constructing and operating a simple, low-cost quantum diamond
spectrometer for performing nuclear magnetic resonance (NMR) and electron spin
resonance (ESR) spectroscopy in nanoscale volumes. The instrument is based on a
commercially-available diamond chip, with an ion-implanted NV-ensemble at a
depth of ~ 10 nm below the diamond surface. The spectrometer operates at low
magnetic fields (~ 300 G) and requires standard optical and microwave
components for NV spin preparation, manipulation and readout. We demonstrate
the utility of this device for nanoscale proton and fluorine NMR spectroscopy,
as well as for the detection of transition metals via ESR noise spectroscopy.
We estimate that the full protocol requires 2-3 months to implement, depending
on the availability of equipment, diamond substrates, and user experience.
|
We present a detailed analysis of the relation between infrared luminosity
and molecular line luminosity, for a variety of molecular transitions, using a
sample of 34 nearby galaxies spanning a broad range of infrared luminosities
(10^{10} < L_{IR} < 10^{12.5} L_sun). We show that the power-law index of the
relation is sensitive to the critical density of the molecular gas tracer used,
and that the dominant driver in observed molecular line ratios in galaxies is
the gas density. As most nearby ultraluminous infrared galaxies (ULIRGs)
exhibit strong signatures of active galactic nuclei (AGN) in their center, we
revisit previous claims questioning the reliability of HCN as a probe of the
dense gas responsible for star formation in the presence of AGN. We find that
the enhanced HCN(1-0)/CO(1-0) luminosity ratio observed in ULIRGs can be
successfully reproduced using numerical models with fixed chemical abundances
and without AGN-induced chemistry effects. We extend this analysis to a total
of ten molecular line ratios by combining the following transitions: CO(1-0),
HCO+(1-0), HCO+(3-2), HCN(1-0), and HCN(3-2). Our results suggest that AGNs
reside in systems with higher dense gas fraction, and that chemistry or other
effects associated with their hard radiation field may not dominate (NGC 1068
is one exception). Galaxy merger could be the underlying cause of increased
dense gas fraction and the evolutionary stage of such mergers may be another
determinant of the HCN/CO luminosity ratio.
|
PASS THIS ONE BY!
Purchased in January, did not last through mid March. I live in Arizona where it doesn't rain much. First time it was in a little sprinkle and I'm talking not enough to make a postal stamp stick, it was fried. DON'T WASTE YOUR MONEY! also it sucked as a media peripheral, does not advance or repeat and the buttons were acting like they were wearing out within the first month.
|
We present a coarse-grained lattice model to study the influence of water on
the recognition process of two rigid proteins. The basic model is formulated in
terms of the hydrophobic effect. We then investigate several modifications of
our basic model showing that the selectivity of the recognition process can be
enhanced by considering the explicit influence of single solvent particles.
When the number of cavities at the interface of a protein-protein complex is
fixed as an intrinsic geometric constraint, there typically exists a
characteristic fraction that should be filled with water molecules such that
the selectivity exhibits a maximum. In addition the optimum fraction depends on
the hydrophobicity of the interface so that one has to distinguish between dry
and wet interfaces.
|
Improved communication systems, shrinking battery sizes and the price drop of
tracking devices have led to an increasing availability of trajectory tracking
data. These data are often analyzed to understand animal behavior.
In this work, we propose a new model for interpreting the animal movent as a
mixture of characteristic patterns, that we interpret as different behaviors.
The probability that the animal is behaving according to a specific pattern, at
each time instant, is non-parametrically estimated using the Logistic-Gaussian
process. Owing to a new formalization and the way we specify the
coregionalization matrix of the associated multivariate Gaussian process, our
model is invariant with respect to the choice of the reference element and of
the ordering of the probability vector components. We fit the model under a
Bayesian framework, and show that the Markov chain Monte Carlo algorithm we
propose is straightforward to implement.
We perform a simulation study with the aim of showing the ability of the
estimation procedure to retrieve the model parameters. We also test the
performance of the information criterion we used to select the number of
behaviors. The model is then applied to a real dataset where a wolf has been
observed before and after procreation. The results are easy to interpret, and
clear differences emerge in the two phases.
|
The existence of an equilibrium glassy phase for charges in a disordered
potential with long-range electrostatic interactions has remained controversial
for many years. Here we conduct an extensive numerical study of the
disorder-temperature phase diagram of the three-dimensional Coulomb glass model
using population annealing Monte Carlo to thermalize the system down to
extremely low temperatures. Our results strongly suggest that, in addition to a
charge order phase, a transition to a glassy phase can be observed, consistent
with previous analytical and experimental studies.
|
This extremely bargain-basement Blaxploitation/Kung-Fu hybrid was in my country released by a questionable DVD label that usually speaking just occupies with the transfer of pure crap onto disc, so that wasn't exactly a favorable herald. Several other titles were released in the same series, like "The Black Six", "The Black Gestapo" and "The Black Godfather" and judging by all their low ratings and negative reviews none of these belong to the elite of the 70's Blaxploitation hype, neither. "TNT Jackson" is a pretty lousy film, completely lacking a significant plot but featuring far too many laughable fighting scenes and horrible acting to compensate. Apparently Roger Corman never too embarrassed to make some easy money assigned two of his most loyal acolytes to rapidly invent a simplistic story that would appeal to fans of both oriental Kung-Fu movies and contemporary trendy Blaxploitation flicks. The result Cirio H. Santiago and Dick Miller came up with was "TNT Jackson"; the tale of an arse-whooping black babe traveling to Hong Kong in search of her missing brother. She quickly discovers he was killed by a criminal network of drug-smugglers and swears to avenge him. Mrs. Jackson smoothly infiltrates into the underground and encounters macho pimps, helpful undercover agents, loads of vicious Kung-Fu fighters. Only one thing's for sure; they all want a piece of TNT's ravishing body in one way or another. I sincerely doubt movie concepts get any more elementary than this, but unfortunately - all the other aspects suck too. The battle scenes are overlong and moreover pathetically staged. Jeannie Bell and the other poor suckers try really hard to stare menacingly and assume a tough position, but eventually all they ever do is kick in the air and stupidly leap across rooms. The cinematography is horrid, the soundtrack is vastly disappointing (whatever happened to soul music?), the few dialogs are poorly written and the acting performances are inferior. Speaking of which, Jeannie Bell is undeniably a beautiful woman, but still she can't hold a candle to Tamara Dobson or Pam Grier. There's only one really good and memorable scene in "TNT Jackson", namely the famous hotel room battle where Bell, entirely naked except for panties, repeatedly switches the light on and off whilst kicking the hell out of some goons. Amusing scene ... I just haven't figured out yet whether it's thanks to the light switch ingenuity or Bell's perfectly shaped breasts.
|
Recent work by Zellers et al. (2018) introduced a new task of commonsense
natural language inference: given an event description such as "A woman sits at
a piano," a machine must select the most likely followup: "She sets her fingers
on the keys." With the introduction of BERT, near human-level performance was
reached. Does this mean that machines can perform human level commonsense
inference?
In this paper, we show that commonsense inference still proves difficult for
even state-of-the-art models, by presenting HellaSwag, a new challenge dataset.
Though its questions are trivial for humans (>95% accuracy), state-of-the-art
models struggle (<48%). We achieve this via Adversarial Filtering (AF), a data
collection paradigm wherein a series of discriminators iteratively select an
adversarial set of machine-generated wrong answers. AF proves to be
surprisingly robust. The key insight is to scale up the length and complexity
of the dataset examples towards a critical 'Goldilocks' zone wherein generated
text is ridiculous to humans, yet often misclassified by state-of-the-art
models.
Our construction of HellaSwag, and its resulting difficulty, sheds light on
the inner workings of deep pretrained models. More broadly, it suggests a new
path forward for NLP research, in which benchmarks co-evolve with the evolving
state-of-the-art in an adversarial way, so as to present ever-harder
challenges.
|
The existence of dark matter has been established in astrophysics. However,
there are no dark matter candidates in the Standard Model~(SM). If the dark
matter particles or their mediator can not interact with SM fermions or gauge
bosons, the Higgs boson is the only portal to the dark matter. We present a
simulation study to search for invisible decays of the Higgs boson at the ILC
with the ILD detector.
|
We study nonlinear stability of spatially homogeneous oscillations in
reaction-diffusion systems. Assuming absence of unstable linear modes and
linear diffusive behavior for the neutral phase, we prove that spatially
localized perturbations decay algebraically with the diffusive rate t^{-n/2} in
space dimension n. We also compute the leading order term in the asymptotic
expansion of the solution, and show that it corresponds to a spatially
localized modulation of the phase. Our approach is based on a normal form
transformation in the kinetics ODE which partially decouples the phase
equation, at the expense of making the whole system quasilinear. Stability is
then obtained by a global fixed point argument in temporally weighted Sobolev
spaces.
|
This movie strayed too far from Straub's novel for me to enjoy. Barely made it to the middle of the film. Besides changing Don Wanderly from Edwards nephew into his son, the removed most of the major scenes and a number of characters that gave the novel so much life. What was left was trash. Straub's version was far superior to this poorly executed film. I don't think casting did all that great a job on picking the Chowder Society members either. Hopefully someone will come along and actually remake this film correctly in my lifetime. I just hate when Hollywood butchers the works of talented authors because they think their version so much better. Makes me sick.
|
Best brush ever.
Oh my my my. I thought I had a Wet Brush but apparently Sally's gave me a knock off brand. I had forgotten why I fell in love with my Original until I received another one. This is the BeST brush and if you or a loved one has thick, curly, wavy hair, you need this brush in your life. Not as crazy about this color tho. It clashes with the yellow. I wish I had gotten then pink one or even better, I wish they would change the color to something besides neon yellow. Not a deal breaker since the brush is so awesome. I read many reviews about other brushes being fake. If this is fake, it's so good that you can't tell the difference so who would care?
|
The development of a modern and more realistic nuclear energy density
functional (EDF) for accurate predictions of properties of nuclei is the
subject of enhanced activity, since it is very important for the study of
properties of nuclear matter (NM), giant resonances and, in particular, of
properties of rare nuclei with unusual neutron-to-proton ratios. Here, we
provide a short review of the current status of the nuclear EDF and the
theoretical results obtained for properties of nuclei and nuclear matter. We
will first describe a method for determining the parameters of the EDF,
associated with the Skyrme type effective interaction, by carrying out a
Hartree-Fock based fit to extensive set of data of ground state properties and
constraints. We will then describe the fully self-consistent Hartree-Fock based
random-phase-approximation theory for calculating the strength functions S(E)
and centroid energies E_CEN of giant resonances and provide results for E_CEN
of isoscalar and isovector giant resonances of multipolarities L=0-3 for a wide
range of spherical nuclei, using 33 EDFs associated with standard form of the
Skyrme type interactions, commonly employed in the literature. We investigate
the sensitivities E_CEN of the giant resonances to bulk properties of NM and
determine constraints on NM properties, such as the incompressibility
coefficient and effective mass, by comparing with experimental data on E_CEN of
giant resonances.
|
Flashlight is decent. The taillight sucks. But it’s cheap,
Flashlight works pretty well, but the mount to tighten it to the handlebar is really hard to tighten. I will need to modify it. The taillight falls apart at the slightest bump. I finally threw it away after I had to snap the cover back on for the 10th time in a week.
|
Model-based reinforcement learning (MBRL) is widely seen as having the
potential to be significantly more sample efficient than model-free RL.
However, research in model-based RL has not been very standardized. It is
fairly common for authors to experiment with self-designed environments, and
there are several separate lines of research, which are sometimes
closed-sourced or not reproducible. Accordingly, it is an open question how
these various existing MBRL algorithms perform relative to each other. To
facilitate research in MBRL, in this paper we gather a wide collection of MBRL
algorithms and propose over 18 benchmarking environments specially designed for
MBRL. We benchmark these algorithms with unified problem settings, including
noisy environments. Beyond cataloguing performance, we explore and unify the
underlying algorithmic differences across MBRL algorithms. We characterize
three key research challenges for future MBRL research: the dynamics
bottleneck, the planning horizon dilemma, and the early-termination dilemma.
Finally, to maximally facilitate future research on MBRL, we open-source our
benchmark in http://www.cs.toronto.edu/~tingwuwang/mbrl.html.
|
We first show that quantum resonant states observe particle number
conservation and hence are consistent with the probabilistic interpretation of
quantum mechanics. We then present for a class of quantum open systems, a
resonant-state expansion of the sum of the retarded and advanced Green's
functions. The expansion is given purely in terms of all discrete eigenstates
and does not contain any background integrals. Using the expansion, we argue
that the Fano asymmetry of resonance peaks is interpreted as interference
between discrete eigenstates. We microscopically derive the Fano parameters for
several cases.
|
We investigate the emergence of singular solutions in a non-local model for a
magnetic system. We study a modified Gilbert-type equation for the
magnetization vector and find that the evolution depends strongly on the length
scales of the non-local effects. We pass to a coupled density-magnetization
model and perform a linear stability analysis, noting the effect of the length
scales of non-locality on the system's stability properties. We carry out
numerical simulations of the coupled system and find that singular solutions
emerge from smooth initial data. The singular solutions represent a collection
of interacting particles (clumpons). By restricting ourselves to the
two-clumpon case, we are reduced to a two-dimensional dynamical system that is
readily analyzed, and thus we classify the different clumpon interactions
possible.
|
yeah, no! it sucks! why? cuz it doesn't suck -- as in the suction!
worked wonderfully until i put an actual phone in it and hit the road! 30 minutes into my trip, it fell off dashboard, under my feet, while on the highway! disaster waiting to happen! can only imagine what would have happened if it rolled under my feet! YOU'VE BEEN WARNED!
|
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