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浙江6+1玩法 www.3qi1e.cn EPA administrator asked to back up climate claims made on TV with science
0425 Ars Technica 29 
Researchers have found an explanation for why many drivers act out toward cyclists: They are actually dehumanizing people who ride bikes, according to an April study by Australian researchers in the journal Transportation Research. From a report: And this dehumanization  the belief that a group of people are less than human  correlates to drivers' selfreported aggressive behavior. Since 2010, cyclist fatalities have increased by 25 percent in the US. A total of 777 bicyclists were killed in crashes with drivers in 2017, and 45,000 were injured from crashes in 2015. Data compiled by the League of American Bicyclists also suggests that, in some states, bicyclists are overrepresented in the number of traffic fatalities. "The idea is that if you don't see a group of people as fully human, then you're more likely to be aggressive toward them," said Narelle Haworth, a professor and director of the Centre for Accident Research and Road Safety at Queensland University of Technology, one
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The aim of this paper is to study the asymptotic properties of the maximum likelihood estimator (MLE) of the drift coefficient for fractional stochastic heat equation driven by an additive spacetime noise. We consider the traditional for stochastic partial differential equations statistical experiment when the measurements are performed in the spectral domain, and in contrast to the existing literature, we study the asymptotic properties of the maximum likelihood (type) estimators (MLE) when both, the number of Fourier modes and the time go to infinity. In the first part of the paper we consider the usual setup of continuous time observations of the Fourier coefficients of the solutions, and show that the MLE is consistent, asymptotically normal and optimal in the meansquare sense. In the second part of the paper we investigate the natural time discretization of the MLE, by assuming that the first N Fourier modes are measured at M time grid points, uniformly spaced over the time inte
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By allowing a mobile device to offload computationintensive tasks to a base station, mobile edge computing (MEC) is a promising solution for saving the mobile device's energy. In real applications, the offloading may span multiple fading blocks. In this paper, we investigate energyefficient offloading over multiple fading blocks with random channel gains. An optimization problem is formulated, which optimizes the amount of data for offloading to minimize the total expected energy consumption of the mobile device. Although the formulated optimization problem is nonconvex, we prove that the objective function of the problem is piecewise convex, and accordingly develop an optimal solution for the problem. Numerical results verify the correctness of our findings and the effectiveness of our proposed method.
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We employ the proximal averaged Newtontype method for optimal control (PANOC) to solve obstacle avoidance problems in real time. We introduce a novel modeling framework for obstacle avoidance which allows us to easily account for generic, possibly nonconvex, obstacles involving polytopes, ellipsoids, semialgebraic sets and generic sets described by a set of nonlinear inequalities. PANOC is particularly wellsuited for embedded applications as it involves simple steps, its implementation comes with a low memory footprint and its fast convergence meets the tight runtime requirements of fast dynamical systems one encounters in modern mechatronics and robotics. The proposed obstacle avoidance scheme is tested on a labscale autonomous vehicle.
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A hyperbolic polynomial (HP) is a real univariate polynomial with all roots real. By Descartes' rule of signs a HP with all coefficients nonvanishing has exactly $c$ positive and exactly $p$ negative roots counted with multiplicity, where $c$ and $p$ are the numbers of sign changes and sign preservations in the sequence of its coefficients. For $c=1$ and $2$, we discuss the question: When the moduli of all the roots of a HP are arranged in the increasing order on the real halfline, at which positions can be the moduli of its positive roots depending on the positions of the sign changes in the sequence of coefficients?
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A deviceindependent dimension test for a Bell experiment aims to estimate the underlying Hilbert space dimension that is required to produce given measurement statistical data without any other assumptions concerning the quantum apparatus. Previous work mostly deals with the twoparty version of this problem. In this paper, we propose a very general and robust approach to test the dimension of any subsystem in a multiparty Bell experiment. Our dimension test stems from the study of a new multiparty scenario which we call prepareanddistribute. This is like the prepareandmeasure scenario, but the quantum state is sent to multiple, noncommunicating parties. Through specific examples, we show that our test results can be tight. Furthermore, we compare the performance of our test to results based on known bipartite tests, and witness remarkable advantage, which indicates that our test is of a true multiparty nature. We conclude by pointing out that with some partial information about
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We study the equivariant elliptic characteristic classes of Schubert varieties of the generalized full flag variety $G/B$. For this first we need to twist the notion of elliptic characteristic class of BorisovLibgober by a line bundle, and thus allow the elliptic classes to depend on extra variables. Using the BottSamelson resolution of Schubert varieties we prove a BGGtype recursion for the elliptic classes, and study the Hecke algebra of our elliptic BGG operators. For $G=GL_n(C)$ we find representatives of the elliptic classes of Schubert varieties in natural presentations of the K theory ring of $G/B$, and identify them with the TarasovVarchenko weight function (a.k.a. elliptic stable envelopes for $T^*G/B$). As a byproduct we find another recursion, different from the known Rmatrix recursion for the fixed point restrictions of weight functions. On the other hand the Rmatrix recursion generalizes for arbitrary reductive group $G$.
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We study a wireless adhoc sensor network (WASN) where $N$ sensors gather data from the surrounding environment and transmit their sensed information to $M$ fusion centers (FCs) via multihop wireless communications. This node deployment problem is formulated as an optimization problem to make a tradeoff between the sensing uncertainty and energy consumption of the network. Our primary goal is to find an optimal deployment of sensors and FCs to minimize a Lagrange combination of the sensing uncertainty and energy consumption. To support arbitrary routing protocols in WASNs, the routingdependent necessary conditions for the optimal deployment are explored. Based on these necessary conditions, we propose a routingaware Lloyd algorithm to optimize node deployment. Simulation results show that, on average, the proposed algorithm outperforms the existing deployment algorithms.
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Semianalytic expressions for the static limit of the $T$matrix for electromagnetic scattering are derived for a circular torus, expressed in both a basis of toroidal harmonics and spherical harmonics. The scattering problem for an arbitrary static excitation is solved using toroidal harmonics, and these are then compared to the extended boundary condition method to obtain analytic expressions for auxiliary $Q$ and $P$matrices, from which $\mathbf{T}=\mathbf{P}\mathbf{Q}^{1}$ (in a toroidal basis). By applying the basis transformations between toroidal and spherical harmonics, the quasistatic limit of the $T$matrix block $\mathbf{T}^{22}$ for electricelectric multipole coupling is obtained. For the toroidal geometry there are two similar $T$matrices on a spherical basis, for computing the scattered field both near the origin and in the far field. Static limits of the optical crosssections are computed, and analytic expressions for the limit of a thin ring are derived.
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We study the bounded endomorphisms of $\ell_{N}^2(G)=\ell^2(G)\times \dots \times\ell^2(G)$ that commute with translations, where $G$ is a discrete abelian group. It is shown that they form a C*algebra isomorphic to the C*algebra of $N\times N$ matrices with entries in $L^\infty(\widehat{G})$, where $\widehat{G}$ is the dual space of $G$. Characterizations of when these endomorphisms are invertible, and expressions for their norms and for the norms of their inverses, are given. These results allow us to study Riesz systems that arise from the action of $ G $ on a finite set of elements of a Hilbert space.
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The differential evolution algorithm is applied to solve the optimization problem to reconstruct the production function (inverse problem) for the spatial Solow mathematical model using additional measurements of the gross domestic product for the fixed points. Since the inverse problem is illposed the regularized differential evolution is applied. For getting the optimized solution of the inverse problem the differential evolution algorithm is paralleled to 32 kernels. Numerical results for different technological levels and errors in measured data are presented and discussed.
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Recently the authors introduced lecture hall tableaux in their study of multivariate little $q$Jacobi polynomials. In this paper, we enumerate bounded lecture hall tableaux. We show that their enumeration is closely related to standard and semistandard Young tableaux. We also show that the number of bounded lecture hall tableaux is the coefficient of the Schur expansion of $s_\lambda(m+y_1,\dots,m+y_n)$. To prove this result, we use two main tools: nonintersecting lattice paths and bijections. In particular we use ideas developed by Krattenthaler to prove bijectively the hook content formula.
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Math is widely considered as a powerful tool and its strong appeal depends on the high level of abstraction it allows in modelling a huge number of heterogeneous phenomena and problems, spanning from the static of buildings to the flight of swarms. As further proof, Gardner's and Carroll's problems have been intensively employed in a number of selection methods and job interviews. Despite the mathematical background, these problems are based on, several solutions and explanations are given in a trivial way. This work proposes a thorough investigation of this framework, as a whole. The results of such study are three mathematical formulations that express the understood mathematical relationship in these wellknown riddles. The proposed formulas are of help in the formalization of the solutions, which have been proven to be less timetaking when compared to the wellknown classic ones, that look more heuristic than rigorous.
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A Deza graph with parameters $(v,k,b,a)$ is a $k$regular graph on $v$ vertices in which the number of common neighbors of two distinct vertices takes two values $a$ or $b$ ($a\leq b$) and both cases exist. In the previous papers Deza graphs with parameters $(v,k,b,a)$ where $kb = 1$ were characterized. In the paper we characterise Deza graphs with $kb = 2$.
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This research considers the ranking and selection (R&S) problem of selecting the optimal subset from a finite set of alternative designs. Given the total simulation budget constraint, we aim to maximize the probability of correctly selecting the topm designs. In order to improve the selection efficiency, we incorporate the information from across the domain into regression metamodels. In this research, we assume that the mean performance of each design is approximately quadratic. To achieve a better fit of this model, we divide the solution space into adjacent partitions such that the quadratic assumption can be satisfied within each partition. Using the large deviation theory, we propose an approximately optimal simulation budget allocation rule in the presence of partitioned domains. Numerical experiments demonstrate that our approach can enhance the simulation efficiency significantly.
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In this paper we study the drawdown related Parisian ruin problem for spectrally negative L\'{e}vy risk processes. We introduce the drawdown Parisian ruin time and solve the corresponding twosided exit time via excursion theory. We also obtain an expression of the potential measure for the process killed at the drawdown Parisian time. As applications, new results are obtained for spectrally negative L\'{e}vy risk process with dividend barrier and Parisian ruin.
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Let $k$ be a field containing an algebraically closed field of characteristic zero. If $G$ is a finite group and $D$ is a division algebra over $k$, finite dimensional over its center, we can associate to a faithful $G$grading on $D$ a normal abelian subgroup $H$, a positive integer $d$ and an element of $Hom(M(H), k^\times)^G$, where $M(H)$ is the Schur multiplier of $H$. Our main theorem is the converse: Given an extension $1\rightarrow H\rightarrow G\rightarrow G/H\rightarrow 1$, where $H$ is abelian, a positive integer $d$, and an element of $Hom(M(H), k^\times)^G$, there is a division algebra with center containing $k$ that realizes these data. We apply this result to classify the $G$simple algebras over an algebraically closed field of characteristic zero that admit a division algebra form over a field containing an algebraically closed field.
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We prove decay with respect to some Lebesgue norms for a class of Schr\"odinger equations with nonlocal nonlinearities by showing new Morawetz inequalities and estimates. As a byproduct, we obtain largedata scattering in the energy space for the solutions to the systems of $N$ defocusing Choquard equations with massenergy intercritical nonlinearities in any space dimension and of defocusing HartreeFock equations, for any dimension $d\geq3$.
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Artin's representation is an injective homomorphism from the braid group $B_n$ on $n$ strands into $\operatorname{Aut}\mathbb{F}_n$, the automorphism group of the free group $\mathbb{F}_n$ on $n$ generators. The representation induces maps $B_n\to\operatorname{Aut}C^*_r(\mathbb{F}_n)$ and $B_n\to\operatorname{Aut}C^*(\mathbb{F}_n)$ into the automorphism groups of the corresponding group $C^*$algebras of $\mathbb{F}_n$. These maps also have natural restrictions to the pure braid group $P_n$. In this paper, we consider twisted versions of the actions by cocycles with values in the circle, and discuss the ideal structure of the associated crossed products. Additionally, we make use of Artin's representation to show that the braid groups $B_\infty$ and $P_\infty$ on infinitely many strands are both $C^*$simple.
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The wellknown plastic number substitution gives rise to a ternary inflation tiling of the real line whose inflation factor is the smallest PisotVijayaraghavan number. The corresponding dynamical system has pure point spectrum, and the associated control point sets can be described as regular model sets whose windows in twodimensional internal space are Rauzy fractals with a complicated structure. Here, we calculate the resulting pure point diffraction measure via a Fourier matrix cocycle, which admits a closed formula for the Fourier transform of the Rauzy fractals, via a rapidly converging infinite product.
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We introduce a family of quasiBanach spaces  which we call wave packet smoothness spaces  that includes those function spaces which can be characterised by the sparsity of their expansions in Gabor frames, wave atoms, and many other frame constructions. We construct Banach frames for and atomic decompositions of the wave packet smoothness spaces and study their embeddings in each other and in a few more classical function spaces such as Besov and Sobolev spaces.
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Lego Education, the educationfocused arm of the veteran Denmark company, is making its biggest product debut in three years, unveiling Spike Prime, a new kit that aims to mix the company's familiar bricks with motors, sensors and introductory coding lessons. The company is targeting kids aged between 11 to 14. From a report: Lego Mindstorms have been around for years. The Mindstorms EV3 robotics kit remains a staple of many learning centers and robotics classrooms. Lego's newest kit looks more like Lego Boost, a programmable kit that aimed to win over families in 2017 and was compatible with regular Lego bricks. It's compatible with Lego Boost, Lego Technic sets and classic Lego pieces, but not with Lego's previous Mindstorms accessories. Lego Mindstorms EV3 is remaining alongside Lego Spike Prime in Lego Education's lineup, and looks like it's aiming more at the high school crowd, while Lego Spike Prime could bridge to that higherend projects. The Spike Prime set is created specif
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An anonymous reader writes: Microsoft today announced that Visual Studio 2019 for Windows and Mac has hit general availability — you can download it now from visualstudio.microsoft.com/downloads. Visual Studio 2019 includes AIassisted code completion with Visual Studio IntelliCode. Separately, realtime collaboration tool Visual Studio Live Share has also hit general availability, and is now included with Visual Studio 2019.
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This account of Anthem’s development, based on interviews with 19 people who either worked on the game or adjacent to it (all of whom were granted anonymity because they were not authorized to talk about Anthem’s development), is a story of indecision and mismanagement. It’s a story of technical failings, as EA’s Frostbite engine continued to make life miserable for many of BioWare’s developers, and understaffed departments struggled to serve their team’s needs. It’s a story of two studios, one in Edmonton, Alberta, Canada and another in Austin, Texas, that grew resentful toward one another thanks to a tense, lopsided relationship. It’s a story of a video game that was in development for nearly seven years but didn’t enter production until the final 18 months, thanks to big narrative reboots, major design overhauls, and a leadership team said to be unable to provide a consistent vision and unwilling to listen to feedback. Perhaps most alarming, it’s a story about a studio in crisis. Do
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Starting today, Microsoft is ending all ebook sales in its Microsoft Store for Windows PCs. "Previously purchased ebooks will be removed from users' libraries in early July," reports The Verge. "Even free ones will be deleted. The company will offer full refunds to users for any books they've purchased or preordered." From the report: Microsoft's "official reason," according to ZDNet, is that this move is part of a strategy to help streamline the focus of the Microsoft Store. It seems that the company no longer has an interest in trying to compete with Amazon, Apple Books, and Google Play Books. It's a bit hard to imagine why anyone would go with Microsoft over those options anyway. If you have purchased ebooks from Microsoft, you can continue accessing them through the Edge browser until everything vanishes in July. After that, customers can expect to automatically receive a refund. According to a newly published Microsoft Store FAQ, "refund processing for eligible customers start rol
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At its DataCentric Innovation Day, Intel today announced its Cascade Lake line of Xeon Scalable data center processors. From a report: The secondgeneration lineup of Xeon Scalable processors comes in 53 flavors that span up to 56 cores and 12 memory channels per chip, but as a reminder that Intel company is briskly expanding beyond "just" processors, the company also announced the final arrival of its Optane DC Persistent Memory DIMMs along with a range of new data center SSDs, Ethernet controllers, 10nm Agilex FPGAs, and Xeon D processors. This broad spectrum of products leverages Intel's overwhelming presence in the data center, it currently occupies ~95% of the worlds server sockets, as a springboard to chew into other markets, including its new assault on the memory space with the Optane DC Persistent Memory DIMMs. The longawaited DIMMs open a new market for Intel and have the potential to disrupt the entire memory hierarchy, but also serve as a potentially key component that ca
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Two new studies reaffirm every computer dunce's worst fears: IT professionals blame the employees they're bound to help for their computer problems  at least when it comes to security. From a report: One, courtesy of SaaS operations management platform BetterCloud, offers grim reading. 91 percent of the 500 IT and security professionals surveyed admitted they feel vulnerable to insider threats. Which only makes one wonder about the supreme (over)confidence of the other 9 percent. [...] Yet now I've been confronted with another survey. This one was performed by the Ponemon Institute at the behest of securityforyoursecurity company nCipher. Its sampling was depressingly large. 5,856 IT and security professionals from around the world were asked for their views of corporate IT security. They seemed to wail in unison at the lesser and more unwashed. Oh, an objective 30 percent insisted that external hackers were the biggest cause for concern. A teethgritting 54 percent, however, s
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It is often necessary to disclose training data to the public domain, while protecting privacy of certain sensitive labels. We use information theoretic measures to develop such privacy preserving data disclosure mechanisms. Our mechanism involves perturbing the data vectors in a manner that strikes a balance in the privacyutility tradeoff. We use maximal information leakage between the output data vector and the confidential label as our privacy metric. We first study the theoretical BernoulliGaussian model and study the privacyutility tradeoff when only the mean of the Gaussian distributions can be perturbed. We show that the optimal solution is the same as the case when the utility is measured using probability of error at the adversary. We then consider an application of this framework to a data driven setting and provide an empirical approximation to the Sibson mutual information. By performing experiments on the MNIST and FERG datasets, we show that our proposed framework a
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A FogRadio Access Network (FRAN) is studied in which cacheenabled Edge Nodes (ENs) with dedicated fronthaul connections to the cloud aim at delivering contents to mobile users. Using an informationtheoretic approach, this work tackles the problem of quantifying the potential latency reduction that can be obtained by enabling DevicetoDevice (D2D) communication over outofband broadcast links. Following prior work, the Normalized Delivery Time (NDT)  a metric that captures the high signaltonoise ratio worstcase latency  is adopted as the performance criterion of interest. Joint edge caching, downlink transmission, and D2D communication policies based on compressandforward are proposed that are shown to be informationtheoretically optimal to within a constant multiplicative factor of two for all values of the problem parameters, and to achieve the minimum NDT for a number of special cases. The analysis provides insights on the role of D2D cooperation in improving the de
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In order to study gravitational waves in any realistic astrophysical scenario, one must consider geometry perturbations up to second order. Here, we present a general technique for studying linear and quadratic perturbations on a spacetime with torsion. Besides the standard metric mode, a "torsionon" perturbation mode appears. This torsional mode will be able to propagate only in a certain kind of theories.
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In this paper, we realize polynomial $\H$modules $\Omega(\lambda,\alpha,\beta)$ from irreducible twisted HeisenbergVirasoro modules $\A_{\alpha,\beta}$. It follows from $\H$modules $\Omega(\lambda,\alpha,\beta)$ and $\mathrm{Ind}(M)$ that we obtain a class of natural nonweight tensor product modules $\big(\bigotimes_{i=1}^m\Omega(\lambda_i,\alpha_i,\beta_i)\big)\otimes \mathrm{Ind}(M)$. Then we give the necessary and sufficient conditions under which these modules are irreducible and isomorphic, and also give that the irreducible modules in this class are new.
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We prove linear inviscid damping near a general class of monotone shear flows in a finite channel, in Gevrey spaces. It is an essential step towards proving nonlinear inviscid damping for general shear flows that are not close to the Couette flow, which is a major open problem in 2d Euler equations.
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We consider the motion of a point mass in a onedimensional viscous compressible barotropic fluid. The fluidpoint mass system is governed by the barotropic compressible NavierStokes equations and Newton's equation of motion. Our main result concerns the long time behavior of the fluid and the point mass; it gives pointwise convergence estimates of the density and the velocity of the fluid to their equilibrium values. As a corollary, it shows that the fluid velocity $U(x,t)$ and the point mass velocity $V(t)=U(h(t)\pm 0,t)$, where $h(t)$ is the location of the point mass, decay differently as $U(\cdot,t)_{L^{\infty}(\mathbb{R}\backslash \{ h(t) \})}\approx t^{1/2}$ and $V(t)\lesssim t^{3/2}$. This discrepancy between the decay rates of $U(\cdot,t)_{L^{\infty}(\mathbb{R}\backslash \{ h(t) \})}$ and $V(t)=U(h(t)\pm 0,t)$ is due to the hyperbolicparabolic nature of the problem: The fluid velocity decays slower on the characteristics $x=\pm ct$, where $c$ is the speed o
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In this work, we revisit a discrete implementation of the primaldescent dualascent gradient method applied to saddlepoint optimization problems. Through a short proof, we establish linear (exponential) convergence of the algorithm for stronglyconvex cost functions with Lipschitz continuous gradients. Unlike previous studies, we provide explicit upper bounds on the stepsize parameters for stable behavior and on the resulting convergence rate and highlight the importance of having two different primal and dual stepsizes. We also explain the effect of the augmented Lagrangian penalty term on the algorithm stability and performance for the distributed minimization of aggregate cost functions over multiagent networks.
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In this work we compute the Dixmier invariants and bitangents of the plane quartics with 3,6 or 9cyclic automorphisms, we find that a quartic curve with 6cyclic automorphism will have 3 horizontal bitangents which form an asysgetic triple. We also discuss the linear matrix representation problem of such curves, and find a degree 6 equation of 1 variable which solves the symbolic solution of the linear matrix representation problem for the curve with 6cyclic automorphism.
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In this paper, we construct some families of infinitely many hyperelliptic curves of genus $2$ with exactly two rational points. In the proof, we first show that the MordellWeil ranks of these hyperelliptic curves are $0$ and then determine the sets of rational points by using the LutzNagell type theorem for hyperelliptic curves which was proven by Grant.
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This paper considers dilations and translations of lines in the Desargues affine plane. A dilation of a line transforms each line into a parallel line whose length is a multiple of the length of the original line. In addition to the usual Playfair axiom for parallel lines in an affine plane, further conditions are given for distinct lines to be parallel in the Desargues affine plane. This paper introduces the dilation of parallel lines in a finite Desargues affine plane that is a bijection of the lines. Two main results are given in this paper, namely, each dilation in a finite Desarguesian plane is an isomorphism between skew fields constructed over isomorphic lines and each dilation in a finite Desarguesian plane occurs in a Pappian space.
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Some data is linearly additive, other data is not. In this paper, I discuss types of data based on the boundedness of the data and their linearity. 1) Unbounded data can be linear. 2) Oneside bounded data is usually log transformed to be linear. 3) Twoside bounded data is not linear. 4) Untidy data do not fit in these categories. An example of twosided bounded data is probabilities which should be transformed into a linear probability space by taking the logarithm of the odds ratio (log10 odds) which is termed Weight (W). Calculations of means and standard deviation is more accurate when calculated as W values than when calculated as probabilities. A methods to analyze untidy data is discussed.
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We introduce a method to improve the tractability of the wellknown Sample Average Approximation (SAA) without compromising important theoretical properties, such as convergence in probability and the consistency of an independent and identically distributed (iid) sample. We consider each scenario as a polyhedron of the mix of firststage and secondstage decision variables. According to John's theorem, the LownerJohn ellipsoid of each polyhedron will be unique which means that different scenarios will have correspondingly different LownerJohn ellipsoids. By optimizing the objective function regarding both feasible regions of the polyhedron and its unique LownerJohn ellipsoid, respectively, we obtain a pair of optimal values, which would be a coordinate on a twodimensional plane. The scenarios, whose coordinates are close enough on the plane, will be treated as one scenario; thus our method reduces the sample size of an iid sample considerably. Instead of using a large iid sample d
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Linux Journal celebrates 25 years since it began publishing. "Most magazines have the life expectancy of a house plant. Such was the betting line for Linux Journal when it started in April 1994. Our budget was a shoestring. The closest our owner, SSC (Specialized System Consultants) came to the magazine business was with the reference cards it published for UNIX, C, VI, Java, Bash and so on."
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Linux.com interviews Richard Hughes about the Linux Vendor Firmware Service (LVFS), which has recently joined the Linux Foundation as a new project. Hughes is the founder and maintainer of the project. "The shortterm goal was to get 95% of updatable consumer hardware supported. With the recent addition of HP that's now a realistic target, although you have to qualify the 95% with 'new consumer nonenterprise hardware sold this year' as quite a few vendors will only support hardware no older than a few years at most, and most still charge for firmware updates for enterprise hardware. My longterm goal is for the LVFS to be seen like a boring, critical part of infrastructure in Linux, much like you’d consider an NTP server for accurate time, or a PGP keyserver for trust. With the recent Spectre and Meltdown issues hitting the industry, firmware updates are no longer seen as something that just adds support for new hardware or fixes the occasional hardware issue. Now the EFI BIO
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As Apple continues to fight legislation that would make it easier for consumers to repair their iPhones, MacBooks, and other electronics, the company appears to be able to implement many of the requirements of the legislation, according to an internal presentation obtained by Motherboard. According to the presentation, titled “Apple Genuine Parts Repair” and dated April 2018, the company has begun to give some repair companies access to Apple diagnostic software, a wide variety of genuine Apple repair parts, repair training, and notably places no restrictions on the types of repairs that independent companies are allowed to do. The presentation notes that repair companies can “keep doing what you’re doing, with … Apple genuine parts, reliable parts supply, and Apple process and training.” This is, broadly speaking, what right to repair activists have been asking state legislators to require companies to offer for years. At this point, Apple’s fight against right to repair is basi
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A user by the name of grem75 has uploaded two screenshots of KDE 0.1 to imgur, and they offer a very intriguing look at just how far we’ve come. I’ve only found this RPM, no source unfortunately. This is installed on Red Hat 4.1 with Qt 1.33. Impressive amount of progress for being so early in development. The project had been announced in October 1996, this package was built in February 1997. There really were no complete desktop environments available for Linux at the time, most distros shipped with FVWM and some assortment of applications from various toolkits. Gnome didn’t start until August of 1997. XFCE existed, but was just a panel for FVWM. I’ve recently made the jump from Windows 10 to KDE Neon on my laptop, and after so many rocky years through KDE 4.x, I have to say the KDE desktop environment currently exists in an incredibly polished and attractive state, striking a perfect balance between attractiveness, usability, and customisability. KDE is curre
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There’s another mobile operating system on the rise, but this one is special for a few reasons. First, it’s not necessarily trying to unseat iOS and Android — it’s designed to run on feature phones. It also has received significant investment from Google, and in most cases, Assistant and other Google applications are preinstalled. The operating system in question is ‘KaiOS,’ and it’s already shipping on a handful of phones, including the 4G version of the Nokia 8810 and the Jio JioPhone. I’ve been using KaiOS for a while on the Maxcom MK241, and while it’s definitely better than the average feature phone, it still has rough edges. A KaiOS device is definitely on my list of devices, since it’s a popular operating system I haven’t yet had the chance to try. I like the idea of having a more focused, less capable device, with better battery life and less distractions.
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We study the limiting behavior of the eigenvalues of KreinFellerOperators with respect to weakly convergent probability measures. Therefore, we give a representation of the eigenvalues as zeros of measure theoretic sine functions. Further, we make a proposition about the limiting behavior of the previously determined eigenfunctions. With the main results we finally determine the speed of convergence of eigenvalues and functions for sequences which converge to invariant measures on the Cantor set.
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This is a review of the geometry of quantum states using elementary methods and pictures. Quantum states are represented by a convex body, often in high dimensions. In the case of nqubits, the dimension is exponentially large in n. The space of states can be visualized, to some extent, by its simple cross sections: Regular simplexes, balls and hyperoctahedra. When the dimension gets large there is a precise sense in which the space of states resembles, almost in every direction, a ball. The ball turns out to be a ball of rather low purity states. We also address some of the corresponding, but harder, geometric properties of separable and entangled states and entanglement witnesses.
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This is a review of the geometry of quantum states using elementary methods and pictures. Quantum states are represented by a convex body, often in high dimensions. In the case of nqubits, the dimension is exponentially large in n. The space of states can be visualized, to some extent, by its simple cross sections: Regular simplexes, balls and hyperoctahedra. When the dimension gets large there is a precise sense in which the space of states resembles, almost in every direction, a ball. The ball turns out to be a ball of rather low purity states. We also address some of the corresponding, but harder, geometric properties of separable and entangled states and entanglement witnesses.
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