The dynamic and lossy nature of wireless communication poses major challenges to reliable, self-organizing multihop networks. These non-ideal characteristics are more problematic with the primitive, low-power radio transceivers found in sensor networks, and raise new issues that routing protocols

... numerical solution procedures and the parameterizations of subgrid-scale and PBL turbulence of the Advanced Regional Prediction System (ARPS) were described. The dynamic and numerical framework of the model was verified using idealized and real mountain flow cases and an idealized density

-tices. These lattices correspond to ideals in the ring Z[ζ], where ζ is some fixed algebraic integer. Under the assumption that this ring Z[ζ] is the maximal order of the number field Q(ζ), we show that the density of n-dimensional ideal lat-tices with determinant ≤ b among all lattices under the same bound is in O(b1

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configurations and k-space sampling patterns. Special attention is given to the currently most practical case, namely, sampling a common Cartesian grid with reduced density. For this case the feasibility of the proposed methods was verified both in vitro and in vivo. Scan time was reduced to one-half using a two

The ratio of shear viscosity to volume density of entropy can be used to characterize how close a given fluid is to being perfect. Using string theory methods, we show that this ratio is equal to a universal value of �/4πkB for a large class of strongly interacting quantum field theories whose dual

Abstract. We prove two results about the quotient over the asymptotic density zero ideal. First, it is forcing equivalent to P(N) / Fin ∗Rc, where Rc is the homogeneous probability measure algebra of character c. Second, if it has analytic Hausdorff gaps then they look considerably different from

Abstract. The density topologies with respect to measure and cate-gory are motivation to consider the density topologies with respect to invariant σ-ideals on R. The properties of such topologies, including the separation axioms, are studied. Notation By R we shall denote the set of all reals

Measurement of any heterogeneous substance poses a challenge. HDL-cholesterol (HDL-C) is no exception. Nu-merous methods, based on different principles, have been widely adopted and these different methods often give significantly different values for HDL-C. The paper of Okazaki et al. [1], in this issue, demonstrates the inade-quacy of a phosphotungstate precipitation method for HDL-C and proposes the use of HPLC as a tool to compare analytical methods for HDL-C. Interest in developing and evaluating methods for the measurement of HDL-C has origins in two separate arenas—one clinical, reflecting increased attention to HDL-C as a risk factor for coronary heart disease (CHD), and the other economic, reflecting increased emphasis on finding more-cost-effective ways to measure HDL-C.

In this note we obtainsome strong barre11edness prop~ erties concerning the simple function space generated by the hereditary ring Z of a11 subsets of density zero of N. RESUMEN En esta nota obtenemos algunas propiedades de fuerte tonelación relativas al espacio de las funciones simples generado