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solidot此次改版内容包括服务器更新、编程语言、网站后台管理的优化、页面和操作流程的优化等。

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  • We compute the relations in the Cox ring of the moduli space $\overline{M}_{0,6}$. This gives a presentation of the Cox ring as a quotient of a polynomial ring with 40 generators by an ideal with 225 generators that come in 5 symmetry classes.

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  • A new characterization of CMO(R^n) is established by the local mean oscillation. Some characterizations of iterated compact commutators on weighted Lebesgue spaces are given, which are new even in the unweighted setting for the first order commutators.

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  • California utilities have not maxed out advanced technology and safer practices to reduce fire risk from downed power lines

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  • We study the $\Gamma$-convergence of damage to fracture energy functionals in the presence of low-order nonlinear potentials that allow us to model physical phenomena such as of fluid-driven fracturing, plastic slip, and the satisfaction of kinematical constraints such as crack non-interpenetration.

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  • We study three finite-dimensional quotient vector spaces constructed from the linear span of the set of characteristic functions of permutohedral cones by imposing two kinds of constraints: (1) neglect characteristic functions of higher codimension permutohedral cones, and (2) neglect characteristic functions of permutohedral cones which contain doubly infinite lines. We construct an ordered basis which is canonical, in the sense that it has subsets which map onto ordered bases for the quotients.

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  • Let $(\mathcal{K} ,\subseteq )$ be a universal class with $LS(\mathcal{K})=\lambda$ categorical in regular $\kappa >\lambda^+$ with arbitrarily large models, and let $\mathcal{K}^*$ be the class of all $\mathcal{A}\in\mathcal{K}_{>\lambda}$ for which there is $\mathcal{B} \in \mathcal{K}_{\ge\kappa}$ such that $\mathcal{A}\subseteq\mathcal{B}$. We prove that $\mathcal{K}^*$ is categorical in every $\xi >\lambda^+$, $\mathcal{K}_{\ge\beth_{(2^{\lambda^+})^+}} \subseteq \mathcal{K}^{*}$, and the models of $\mathcal{K}^*_{>\lambda^+}$ are essentially vector spaces (or trivial i.e. disintegrated).

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  • We calculate the homotopy type of $L_1L_{K(2)}S^0$ and $L_{K(1)}L_{K(2)}S^0$ at the prime 2, where $L_{K(n)}$ is localization with respect to Morava $K$-theory and $L_1$ localization with respect to $2$-local $K$ theory. In $L_1L_{K(2)}S^0$ we find all the summands predicted by the Chromatic Splitting Conjecture, but we find some extra summands as well. An essential ingredient in our approach is the analysis of the continuous group cohomology $H^\ast(\mathbb{G}_2,E_0)$ where $\mathbb{G}_2$ is the Morava stabilizer group and $E_0 = \mathbb{W}[[u_1]]$ is the ring of functions on the height $2$ Lubin-Tate space. We show that the inclusion of the constants $\mathbb{W} \to E_0$ induces an isomorphism on group cohomology, a radical simplification.

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  • In this semi-expository paper we review the notion of a spherical space. In particular we present some recent results of Wedhorn on the classification of spherical spaces over arbitrary fields. As an application, we introduce and classify reductive monoid spaces over an arbitrary field.

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  • The connection between geodesics on the modular surface $\operatorname{PSL}(2,{\mathbb Z})\backslash {\mathbb H}$ and regular continued fractions, established by Series, is extended to a connection between geodesics on $\Gamma\backslash {\mathbb H}$ and odd and grotesque continued fractions, where $\Gamma\cong {\Bbb Z}_3 \ast {\Bbb Z}_3$ is the index two subgroup of $\operatorname{PSL}(2,{\mathbb Z})$ generated by the free elements of order three $\left( \begin{smallmatrix} 0 & -1 1 & 1 \end{smallmatrix} \right)$ and $\left( \begin{smallmatrix} 0 & 1 -1 & 1 \end{smallmatrix} \right)$, having an ideal quadrilateral as fundamental domain. A similar connection between geodesics on $\Theta\backslash {\mathbb H}$ and even continued fractions is discussed in our framework, where $\Theta$ denotes the Theta subgroup of $\operatorname{PSL}(2,{\mathbb Z})$ generated by $\left( \begin{smallmatrix} 0 & -1 1 & 1 \end{smallmatrix} \right)$ and $\left( \begin{smallmatrix} 1 &a

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  • We rewrite the (extended) Ooguri-Vafa partition function for colored HOMFLY-PT polynomials for torus knots in terms of the free-fermion (semi-infinite wedge) formalism, making it very similar to the generating function for double Hurwitz numbers. This allows us to perform a key step towards a purely combinatorial proof of topological recursion for colored HOMFLY-PT polynomials for torus knots: we prove the quasi-polynomiality property of the coefficients of the extended Ooguri-Vafa partition function in a purely combinatorial way. Non-polynomial factors are related to Jacobi polynomials, regarding which we obtain some new results on the way. In addition to that, we show that the (0,1)- and (0,2)-functions on the corresponding spectral curve are in agreement with the colored HOMFLY-PT polynomials data.

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  • Deformation of morphisms along leaves of foliations define the tangential foliation on the corresponding space of morphisms. We prove that codimension one fo-liations having a tangential foliation with at least one non-algebraic leaf are transversely homogeneous with structure group determined by the codimension of the non-algebraic leaf in its Zariski closure. As an application, we provide a structure theorem for degree three foliations on $P^3$ .

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  • The Connected Vertex Cover problem is to decide if a graph $G$ has a vertex cover of size at most $k$ that induces a connected subgraph of $G$. A graph is $H$-free if it does not contain $H$ as an induced subgraph. We prove that Connected Vertex Cover is polynomial-time solvable for $(sP_1+P_5)$-free graphs for all $s\geq 0$.

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  • Let $k$ be an arbitrary commutative ring and $S$ be a polynomial ring over $k$ with a monomial order $\prec$. For a given monomial ideal $J$, the moduli space of reduced \gr\ bases whose initial ideal is $J$ is determined. In this paper, we introduce a procedure for constructing of such moduli space.

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  • Machine learning is finding increasingly broad application in the physical sciences. This most often involves building a model relationship between a dependent, measurable output and an associated set of controllable, but complicated, independent inputs. We present a tutorial on current techniques in machine learning -- a jumping-off point for interested researchers to advance their work. We focus on deep neural networks with an emphasis on demystifying deep learning. We begin with background ideas in machine learning and some example applications from current research in plasma physics. We discuss supervised learning techniques for modeling complicated functions, beginning with familiar regression schemes, then advancing to more sophisticated deep learning methods. We also address unsupervised learning and techniques for reducing the dimensionality of input spaces. Along the way, we describe methods for practitioners to help ensure that their models generalize from their training data

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  • In the past extensive researches have been conducted on demand side management (DSM) program which aims at reducing peak loads and saving electricity cost. In this paper, we propose a framework to study decentralized household demand side management in a residential distribution network which consists of multiple smart homes with schedulable electrical appliances and some rooftop photovoltaic generation units. Each smart home makes individual appliance scheduling to optimize the electric energy cost according to the day-ahead forecast of electricity prices and its willingness for convenience sacrifice. Using the developed simulation model, we examine the performance of decentralized household DSM and study their impacts on the distribution network operation and renewable integration, in terms of utilization efficiency of rooftop PV generation, overall voltage deviation, real power loss, and possible reverse power flows.

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  • Previous work has shown that the one-dimensional (1D) inviscid compressible flow (Euler) equations admit a wide variety of scale-invariant solutions (including the famous Noh, Sedov, and Guderley shock solutions) when the included equation of state (EOS) closure model assumes a certain scale-invariant form. However, this scale-invariant EOS class does not include even simple models used for shock compression of crystalline solids, including many broadly applicable representations of Mie-Gr\"uneisen EOS. Intuitively, this incompatibility naturally arises from the presence of multiple dimensional scales in the Mie-Gr\"uneisen EOS, which are otherwise absent from scale-invariant models that feature only dimensionless parameters (such as the adiabatic index in the ideal gas EOS). The current work extends previous efforts intended to rectify this inconsistency, by using a scale-invariant EOS model to approximate a Mie- Gr\"uneisen EOS form. To this end, the adiabatic bulk modulus for the Mi

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  • We introduce two novel bivariate parametric covariance models, the powered exponential (or stable) covariance model and the generalized Cauchy covariance model. Both models allow for flexible smoothness, variance, scale, and cross-correlation parameters. The smoothness parameter is in $(0, 1]$. Additionally, the bivariate generalized Cauchy model allows for distinct long range parameters. We also show that the univariate spherical model can be generalized to the bivariate case only in a trivial way. The results are based on general sufficient conditions for the positive definiteness of $2\times2$-matrix valued functions. These conditions require only computing the derivatives of a bivariate covariance function of order 2 and 3 in $\R$ and in $\R^3$, respectively, and calculating an infimum of a function of one variable. In a data example on the content of copper and lead in the top soil in a flood plain along the river Meuse we compare the bivariate powered exponential model to the tra

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  • In this paper, we mainly investigate the set of critical points associated to solutions of mean curvature equation with zero Dirichlet boundary condition in a strictly convex domain and a nonconvex domain respectively. Firstly, we deduce that mean curvature equation has exactly one nondegenerate critical point in a smooth, bounded and strictly convex domain of $\mathbb{R}^{n}(n\geq2)$. Secondly, we study the geometric structure about the critical set $K$ of solutions $u$ for the constant mean curvature equation in a concentric (respectively an eccentric) spherical annulus domain of $\mathbb{R}^{n}(n\geq3)$, and deduce that $K$ exists (respectively does not exist) a rotationally symmetric critical closed surface $S$. In fact, in an eccentric spherical annulus domain, $K$ is made up of finitely many isolated critical points ($p_1,p_2,\cdots,p_l$) on an axis and finitely many rotationally symmetric critical Jordan curves ($C_1,C_2,\cdots,C_k$) with respect to an axis.

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  • We prove curvature-free versions of the celebrated Margulis Lemma. We are interested by both the algebraic aspects and the geometric ones, with however an emphasis on the second and we aim at giving quantitative (computable) estimates of some important invariants. Our goal is to get rid of the pointwise curvature assumptions in order to extend the results to more general spaces such as certain metric spaces. Essentially the upper bound on the curvature is replaced by the assumption that the space is \_ $\delta$-hyperbolic in the sense of Gromov and the lower bound of the curvature by an upper bound on the entropy which we recall the definition.

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  • In the literature, it has been revealed that the Camassa-Holm (CH) peakon dynamical system and the finite Toda lattice may be regarded as opposite flows. As an intriguing analogue to the CH equation, the Degasperis-Procesi (DP) equation also supports the presence of peakon solutions. A natural question arises: does there exist a corresponding lattice of Toda type for the DP peakon lattice as the CH peakon and Toda lattices do? In this paper, our aim is to give an answer to this question. Noticing that the tau function of the DP peakon lattice is expressed in terms of bimoment determinants related to the Cauchy kernel, we impose opposite time evolution on the moments and derive the corresponding bilinear equations. By introducing appropriate nonlinear variables, a novel Toda lattice of CKP type together with a Lax pair is obtained. As a result, we give a unified picture for the CH peakon and Toda, Novikov peakon and B-Toda, DP peakon and C-Toda lattices.

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  • We revisit total variation denoising and study an augmented model where we assume that an estimate of the image gradient is available. We show that this increases the image reconstruction quality and derive that the resulting model resembles the total generalized variation denoising method, thus providing a new motivation for this model. Further, we propose to use a constraint denoising model and develop a variational denoising model that is basically parameter free, i.e. all model parameters are estimated directly from the noisy image. Moreover, use Chambolle-Pock's primal dual method as well as the Douglas-Rachford method for the new models. For the latter one has to solve large discretizations of partial differential equations and we derive preconditioners to do so. Numerical experiments show that the resulting method has good denoising properties and also that preconditioning does increase convergence significantly.

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  • We explore the boundaries of sine kernel universality for the eigenvalues of Gaussian perturbations of large deterministic Hermitian matrices. Equivalently, we study for deterministic initial data the time after which Dyson's Brownian motion exhibits sine kernel correlations. We explicitly describe this time span in terms of the limiting density and rigidity of the initial points. Our main focus lies on cases where the initial density vanishes at an interior point of the support. We show that the time to reach universality becomes larger if the density vanishes faster or if the initial points show less rigidity.

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  • In Weil (2001) formulas were proved for stationary Boolean models $Z$ in $\mathbb{R}^d$ with convex or polyconvex grains, which express the densities of mixed volumes of $Z$ in terms of related mean values of the underlying Poisson particle process $X$. These formulas were then used to show that in dimensions 2 and 3 the mean values of $Z$ determine the intensity $\gamma$ of $X$. For $d=4$ a corresponding result was also stated, but the proof given was incomplete, since in the formula for the mean Euler characteristic $\overline V_0 (Z)$ a term $\overline V^{(0)}_{2,2}(X,X)$ was missing. This was pointed out in Goodey and Weil (2002), where it was also explained that a new decomposition result for mixed volumes and mixed translative functionals would be needed to complete the proof. Such a general decomposition result is now available based on flag measures of the convex bodies involved (Hug, Rataj and Weil (2013, 2017)). Here, we show that such flag representations not only lead to a

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  • This paper considers the backstepping design of state feedback controllers for coupled linear parabolic partial integro-differential equations (PIDEs) of Volterra-type with distinct diffusion coefficients, spatially-varying parameters and mixed boundary conditions. The corresponding target system is a cascade of parabolic PDEs with local couplings allowing a direct specification of the closed-loop stability margin. The determination of the state feedback controller leads to kernel equations, which are a system of coupled linear second-order hyperbolic PIDEs with spatially-varying coefficients and rather unusual boundary conditions. By extending the method of successive approximations for the scalar case to the considered system class, the well-posedness of these kernel equations is verified by providing a constructive solution procedure. This results in a systematic method for the backstepping control of coupled parabolic PIDEs as well as PDEs. The applicability of the new backstepping

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  • This study covers an analytical approach to calculate positively invariant sets of dynamical systems. Using Lyapunov techniques and quantifier elimination methods, an automatic procedure for determining bounds in the state space as an enclosure of attractors is proposed. The available software tools permit an algorithmizable process, which normally requires a good insight into the systems dynamics and experience. As a result we get an estimation of the attractor, whose conservatism only results from the initial choice of the Lyapunov candidate function. The proposed approach is illustrated on the well-known Lorenz system.

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  • This paper computes the obstruction to the existence of equivariant extensions of basic gerbes over non-simply connected compact simple Lie groups. By modifying a (finite dimensional) construction of Gaw\c{e}dzki-Reis [J. Geom. Phys. 50(1):28-55, 2004], we exhibit basic equivariant bundle gerbes over non-simply connected compact simple Lie groups.

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  • In this paper, we mainly investigate the critical points associated to solutions $u$ of a quasilinear elliptic equation with nonhomogeneous Dirichlet boundary conditions in a connected domain $\Omega$ in $\mathbb{R}^2$. Based on the fine analysis about the distribution of connected components of a super-level set $\{x\in \Omega: u(x)>t\}$ for any $\mathop {\min}_{\partial\Omega}u(x)<t<\mathop {\max}_{\partial\Omega}u(x)$, we obtain the geometric structure of interior critical points of $u$. Precisely, when $\Omega$ is simply connected, we develop a new method to prove $\Sigma_{i = 1}^k {{m_i}}+1=N$, where $m_1,\cdots,m_k$ are the respective multiplicities of interior critical points $x_1,\cdots,x_k$ of $u$ and $N$ is the number of global maximum points of $u$ on $\partial\Omega$. When $\Omega$ is an annular domain with the interior boundary $\gamma_I$ and the external boundary $\gamma_E$, where $u|_{\gamma_I}=H,~u|_{\gamma_E}=\psi(x)$ and $\psi(x)$ has $N$ local (global) maxim

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  • By combining the algebraic Bethe ansatz and the off-diagonal Bethe ansatz, we investigate the trigonometric SU(3) model with generic open boundaries. The eigenvalues of the transfer matrix are given in terms of an inhomogeneous T-Q relation, and the corresponding eigenstates are expressed in terms of nested Bethe-type eigenstates which have well-defined homogeneous limit. This exact solution provides basis for further analyzing the thermodynamic properties and correlation functions of the anisotropic models associated with higher rank algebras.

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  • Every major cryptocurrency suffered double-digit losses in the last 24 hours.

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  • We propose two coded schemes for the distributed computing problem of multiplying a matrix by a set of vectors. The first scheme is based on partitioning the matrix into submatrices and applying maximum distance separable (MDS) codes to each submatrix. For this scheme, we prove that up to a given number of partitions the communication load and the computational delay (not including the encoding and decoding delay) are identical to those of the scheme recently proposed by Li et al., based on a single, long MDS code. However, due to the use of shorter MDS codes, our scheme yields a significantly lower overall computational delay when the delay incurred by encoding and decoding is also considered. We further propose a second coded scheme based on Luby Transform (LT) codes under inactivation decoding. Interestingly, LT codes may reduce the delay over the partitioned scheme at the expense of an increased communication load. We also consider distributed computing under a deadline and show nu

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  • We study Brownian motion and stochastic parallel transport on Perelman's almost Ricci flat manifold $\mathscr M=M\times \mathbb S^N\times I$, whose dimension depends on a parameter $N$ unbounded from above. We construct sequences of projected Brownian motions and stochastic parallel transports which for $N \to \infty$ converge to the corresponding objects for the Ricci flow. In order to make precise this process of passing to the limit, we study the martingale problems for the Laplace operator on $\mathscr M$ and for the horizontal Laplacian on the orthonormal frame bundle $\mathscr{OM}$ . As an application, we see how the characterizations of two-sided bounds on the Ricci curvature established by A. Naber applied to Perelman's manifold lead to the inequalities that characterize solutions of the Ricci flow discovered by Naber and the second author.

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  • We introduce the notion of a braiding on a skew monoidal category, whose curious feature is that the defining isomorphisms involve three objects rather than two. These braidings are shown to arise from, and classify, cobraidings (also known as coquasitriangular structures) on bialgebras. Using a multicategorical approach we also describe examples of braidings on skew monoidal categories arising from 2-category theory.

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  • A (semi)brick over an algebra $A$ is a module $S$ such that the endomorphism ring $\operatorname{\mathsf{End}}_A(S)$ is a (product of) division algebra. For each Dynkin diagram $\Delta$, there is a bijection from the Coxeter group $W$ of type $\Delta$ to the set of semibricks over the preprojective algebra $\Pi$ of type $\Delta$, which is restricted to a bijection from the set of join-irreducible elements of $W$ to the set of bricks over $\Pi$. This paper is devoted to giving an explicit description of these bijections in the case $\Delta=\mathbb{A}_n$ or $\mathbb{D}_n$. First, for each join-irreducible element $w \in W$, we describe the corresponding brick $S(w)$ in terms of "Young diagram-like" notation. Next, we determine the canonical join representation $w=\bigvee_{i=1}^m w_i$ of an arbitrary element $w \in W$ based on Reading's work, and prove that $\bigoplus_{i=1}^n S(w_i)$ is the semibrick corresponding to $w$.

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    Ad Astra Diplomacy

    12-21 IEEE 373

    Showy and expensive, space exploration is a fine tool for fostering international cooperation

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  • A Commercial Reuse License Can Be the Best of Both Worlds (2016)

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  • Earthworms can reproduce in Mars soil simulant

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    CDE on OpenBSD 6.2

    12-21 OSnews 406

    If you've noticed a disruption in the time-space continuum recently, it is likely because I have finally been able to compile and install the Common Desktop Environment (CDE) in a current and actively-developed operating system (OpenBSD 6.2 in this case). Since it's been a while - I love CDE.

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  • As many foreign workers are forced out of the country, don’t expect smart machines to clean your office or help out on the farm.

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  • Meera Subramanian visits the Dirty Dog Dryland Derby, in northern Wisconsin, to see how the sport of dogsledding is adapting to climate change—and how the mushers feel about it.

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  • Mark Gurman: Starting as early as next year, software developers will be able to design a single application that works with a touchscreen or mouse and trackpad depending on whether it's running on the iPhone and iPad operating system or on Mac hardware, according to people familiar with the matter. Developers currently must design two different apps - one for iOS, the operating system of Apple's mobile devices, and one for macOS, the system that runs Macs. That's a lot more work. What's more, Apple customers have long complained that some Mac apps get short shrift. For example, while the iPhone and iPad Twitter app is regularly updated with the social network's latest features, the Mac version hasn't been refreshed recently and is widely considered substandard. With a single app for all machines, Mac, iPad and iPhone users will get new features and updates at the same time. Apple currently plans to begin rolling out the change as part of next fall's major iOS and macOS updates, s

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    Analyzing One Million Robots.txt Files

    12-21 Hacker News 399

    Analyzing One Million Robots.txt Files

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    CRISPR: The Next Hearing-Loss Treatment?

    12-21 MIT Technology 391

    As many foreign workers are forced out of the country, don’t expect smart machines to clean your office or help out on the farm.

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  • As many foreign workers are forced out of the country, don’t expect smart machines to clean your office or help out on the farm.

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  • Can You Think Yourself into a Different Person? (2015)

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  • As many foreign workers are forced out of the country, don’t expect smart machines to clean your office or help out on the farm.

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  • The ability engineer new properties into MOFs might be a game changer for sensors and solar cells

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  • Firefox 57 delays requests to tracking domains

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  • The Fedora Project has announced a number of changes to its modularity initiative after failing to meet its initial set of goals. "From an end-user’s perspective, Fedora will ship with two sets of repositories. One will be the traditional Fedora repositories (fedora, updates, and updates-testing) and the other will be a new set of repositories providing alternative and supplementary modules. We haven’t decided on a final name for these yet, so we will use the placeholder terms modular, modular-updates, and modular-updates-testing."

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  • Follows over a year of Oculus software lockouts aimed at rivals like HTC Vive.

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  • So you can keep track of your online persona.

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  • Listen to Angela Ruggerio, CEO and Co-founder of the Sports Innovation Lab and four time Olympic Ice Hockey player share her vision of sports and technology.

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  • Facebook just loosened the leash a little on its facial-recognition algorithms. Starting Tuesday, any time someone uploads a photo that includes what Facebook thinks is your face, you’ll be notified even if you weren't tagged. The new feature rolled out to most of Facebook's more than 2 billion global users this morning. It applies only to newly posted photos, and only those with privacy settings that make an image visible to you. Facebook users in Canada and the European Union are excluded. The social network doesn't use facial-recognition technology in those regions, due to wariness from privacy regulators. Just a heads up.

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  • FDA continues to find safety problems. Homeopaths “hopeful” FDA won’t impede access.

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    Dynamicland

    12-20 Hacker News 445
  • It’s expected to deliver hormones more effectively than injections or pills.

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    2017: The Year In Robocars

    12-20 IEEE 396

    Promises of self-driving cars are beginning to come due

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  • If someone uploads a photo of your face to Facebook, the company usually knows that it's you thanks to facial recognition technology. Now Facebook won't just know it's you -- it'll tell you about the photo, too. From a report: Facebook is expanding its use of facial recognition technology and will now alert people that a friend, or a friend of a friend, uploaded a photo of them, even if they haven't been tagged in the picture. If anyone uploads a profile picture that includes your face, Facebook will alert you of that, too. "We're doing this to prevent people from impersonating others on Facebook," the company wrote on its blog Tuesday.

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  • Testing suggests that iOS 10.2.1 added this functionality to prevent shutdowns.

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  • Earlier this month a post on social media which suggested that Apple might be deliberately downgrading performance on iPhone models with degraded battery was widely circulated. Benchmark Primate Labs' Geekbench has looked into the matter and is corroborating the claims. From a report: Primate Labs founder John Poole has plotted the kernel density of Geekbench 4 scores for iPhone 6s models running iOS 10.2, iOS 10.2.1, and iOS 11.2, visualizing an apparent link between lower performance and degraded battery health. The charts show that on iOS 10.2, the vast majority of iPhone 6s devices benchmarked similarly in performance. However, Poole explains that the distribution of iPhone 6s scores for iOS 10.2.1 appears multimodal, with one large peak around the average and several smaller peaks around lower scores. In other words, after iOS 10.2.1 was released last January, the performance of a percentage of iPhone 6s devices began to suffer.

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  • FCC would be permanently barred from using Title II authority over broadband.

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  • Marcia Bjornerud looks back on the year in seismic events, from North Korea’s supposed hydrogen-bomb test to Mexico’s twin earthquakes to the underground effects of Hurricanes Harvey and Irma.

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    Explore a Model Factory

    12-19 MIT Technology 435

    To help you better understand the potential of Industry 4.0, we decided to bring our model factory to you.

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  • Facebook is cracking down on a new type of clickbait: Posts that ask people to "Like" or share or comment to goose engagement numbers, what Facebook is calling "engagement bait." Their solution? Demote the posts considered to be "engagement bait." Recode reports: Facebook has decided it doesn't like publishers gaming the system this way, and claims users don't like it either."People have told us that they dislike spammy posts on Facebook that goad them into interacting with likes, shares, comments, and other actions," the company wrote on its blog. So starting Monday, posts that Facebook considers to be engagement bait will be pushed down in News Feed. Beginning in a few weeks, publishers and Pages that continue to utilize this tactic will see their reach diminished for all of their posts.

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  • Exploiting Windows 10 in a Local Network with WPAD/PAC and JScript

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  • A new device uses solar-powered electrolysis to separate hydrogen from seawater without any membranes or pumps

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    Four stable kernels

    12-19 LWN 435

    Stable kernels 4.14.7, 4.9.70, 4.4.106, and 3.18.88 have been released. They all contain important fixes and users should upgrade.

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  • The European Union was aiming for a "deterrent effect" on Google and other technology giants when it ordered the Android-maker to pay 2.4 billion euros ($2.8 billion) for breaching antitrust law over how it displays shopping ads. From a report: Regulators weighed "the need to ensure that the fine has a sufficiently deterrent effect not only on Google and Alphabet but also on undertakings of a similar size and with similar resources," the European Commission said in a 215-page document laying out details of its seven-year investigation into the company. The "particularly large" revenue of Google's parent, Alphabet, also determined the size of the fine, the EU said. The penalty, levied in June, was more than double an earlier 1 billion-euro fine on Intel and came with a threat of more daily fines for Google if it didn't comply with an order to offer equal treatment to rival shopping-comparison services. Big numbers for big technology names have been a theme for EU Competition Commissione

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  • Attackers bypass HTTPS encryption protection by registering new TLS certificate.

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    How do Ruby and Python profilers work?

    12-19 Hacker News 536

    How do Ruby and Python profilers work?

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  • A funeral home with a drive-thru window opened in Nagano Prefecture on Sunday, allowing mourners to pay their respects without getting out of the car. From a report: The operator of the Aishoden funeral home in Ueda said the service is the first of its kind in Japan. It is primarily aimed at allowing seniors and the disabled to attend funerals but may also be used in the future by people short on time. During a tour Saturday, residents lined up to get a look at the innovative facility, which allows drive-thru mourners to stop their cars next to a window and enter their names and addresses on a device handed over by a waiting receptionist.

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  • How traders 'pump and dump' cryptocurrencies

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  • Moscow-based anti-virus company Kaspersky Lab sued the Trump administration in U.S. federal court on Monday, arguing that the American government has deprived it of due process rights by banning its software from U.S. government agencies. From a report: The lawsuit is the latest effort by Kaspersky Lab to push back on allegations that the company is vulnerable to Kremlin influence. The Department of Homeland Security in September issued a directive to U.S. civilian agencies ordering them to remove Kaspersky Lab from their computer networks within 90 days. The order came amid mounting concern among U.S. officials that the software could enable Russian espionage and threaten national security. The ban was codified last week when President Donald Trump signed legislation banning Kasperky Lab from use across civilian and military agencies.

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  • Plus deals on laptops, 4K TVs, the Nvidia Shield, and more.

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  • Improving my productivity using Pomodoro: takeaways after 2 years of practice

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  • Ian Crouch on Mark Hamill’s redemptive performance as Luke Skywalker in “Star Wars: The Last Jedi.”

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    Emily Nussbaum: The Best TV Shows of 2017

    12-19 THE NEW YORKER 578

    Emily Nussbaum writes about her top TV shows from 2017, including “The Leftovers,” “The Deuce,” “Crazy Ex-Girlfriend,” “Broad City,” “Big Little Lies,” and more.

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  • Our application note describes the techniques and hardware required to characterize E/O and O/E devices, as well as optical components with economies of scale and flexibility not present in current Lightwave Component Analyzer (LCA) designs.

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  • A Look at the Internals of 'Tiered JIT Compilation' in .NET Core

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  • A friend of mine died and I didn't know because of algorithms

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  • Abandoned rape kits identify over 800 serial rapists in one Michigan county

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