It has been a concern among educators and academics that U.S. students suffer from a lack of knowledge about the world around them. This is reflected in low history scores, particularly in world history. The common explanation for this is that there is some systematic deficiency in American students, in that they either do not know the material or have poor testing strategies. We offer a differ...

In a strictly Bayesian approach, prior parameters are assumed known, based on common or subjective knowledge. But a practical solution for maximum a posteriori adaptation methods is to adopt an empirical Bayesian approach, where the prior parameters are estimated directly from training speech data itself. So there is a problem of mismatches between training and testing conditions in the use of ...

In this paper, we have obtained the plane wave like solutions of the Einstein-Maxwell equations in presence of null fluids and null currents with particular cases.

A Bispo,3 D Cluzeau,4 R Creamer,1 M Dombos,I U Graefe,# PH Krogh,33 JP Sousa,44 G Peres,4 M Rutgers,11 A Winding,33 and J Römbke*II 7French Agency for Environment and Energy Management, France 8University of Rennes, France 6Teagasc, Ireland IResearch Institute for Soil Science and Agricultural Chemistry, Hungary #Institut für Angewandte Bodenbiologie, Germany 77Aarhus University, Denmark 88Univ...

We present a general framework for contextuality tests in phase space using displacement operators. First, we derive a general condition that a single-mode displacement operator should fulfill in order to construct Peres-Mermin square and similar scenarios. This approach offers a straightforward scheme for experimental implementations of the tests via modular variable measurements. In addition ...

In this paper we get a power estimate from above of the probability that Buffon’s needle will land within distance 3 of Sierpinski’s gasket of Hausdorff dimension 1. In comparison with the case of 1/4 corner Cantor set considered in Nazarov, Peres, and the second author [14]: we still need the technique of [14] for splitting the directions to good and bad ones, but the case of Sierpinski gasket...

Abstract. We say that permutations π1, . . . , πr ∈ Sn invariably generate Sn if, no matter how one chooses conjugates π 1 , . . . , π r of these permutations, π 1 , . . . , π r generate Sn. We show that if π1, π2, π3 are chosen randomly from Sn then, with probability tending to 1 as n → ∞, they do not invariably generate Sn. By contrast it was shown recently by Pemantle, Peres and Rivin that f...

Explicit separable density matrices, for mixed–two-qubits states, are derived by using Hilbert-Schmidt (HS) decompositions and Peres-Horodecki criterion. A “strongly separable” two-qubits mixed state is defined by multiplications of two density matrices, given with pure states, while “weakly separable” two-qubits mixed state is defined, by multiplications of two density matrices, which includes...

Solutions to gravity with quadratic Lagrangians are found for the simple case where the only nonconstant metric component is the lapse N and the Riemann tensor takes the form R .itj = −kikj , i, j = 1, 2, 3; thus these solutions depend on cross terms in the Riemann tensor and therefore complement the linearized theory where it is the derivatives of the Riemann tensor that matter. The relationsh...

We show how to design families of operational criteria that distinguish entangled from separable quantum states. The simplest of these tests corresponds to the well-known Peres-Horodecki positive partial transpose (PPT) criterion, and the more complicated tests are strictly stronger. The new criteria are tractable due to powerful computational and theoretical methods for the class of convex opt...