Regulation of the Na,K pump in intact cells is strongly associated with the level of intracellular Na+. Experiments were carried out on intact, isolated sheep Purkinje strands at 37 degrees C. Membrane potential (Vm) was measured by an open-tipped glass electrode and intracellular Na+ activity (aNai) was calculated from the voltage difference between an Na+-selective microelectrode (ETH 227) an...

This paper illustrates some work in progress on 3-dimensional transportation problems,of format r×s×t say. Following Conti and Traverso, a suitable Gröbner basis is sought for, which is hard to be calculated by means of Buchberger algorithm. A different approach involving graph theory makes the calculation tractable when r = s = t = 3 (and in fact whenever 3 ∈ {r, s, t}). Introduction The aim o...

From (15) and (II), it follows that because N(0) = IV(O). The resulting estimate of X(w) is given by m bee (2211 c J(Wi-w/&(w) = J(w-Wk), k = 1,. .. ,m. (16) i=l With Aik the elements of the inverse of a matrix whose elements X(w) = X(w) + &) [N(w)-iv(O) +$q equal d(wi-wk), the system (16) yields and the mean-square error by [see (21)] m @i(w) = C A;J(w-wk). k=l (17) From (16), it follows that ...

Newly developed assumed stress finite elements, based on a mixed variational principle which includes unsymmetric stress, rotation (drilling degrees of freedom), pressure, and displacement as variables, are presented. The elements are capable of handling geometrically nonlinear as well as materially nonlinear two dimensional problems, with and without volume constraints. As an application of th...

The free analog of the pressure is introduced for multivariate noncommutative random variables and its Legendre transform is compared with Voiculescu’s microstate free entropy. Introduction The entropy and the pressure are two fundamental ingredients in both classical and quantum statistical mechanics, in particular, in classical and quantum lattice systems (see [11, 2] for example). They are t...

Sequences of discrete Levy and adjoint Levy transformations for the multidimensional quadrilateral lattices are studied. After a suitable number of iterations we show how all the relevant geometrical features of the transformed quadrilateral lattice can be expressed in terms of multi-Casorati determinants. As an example we dress the Cartesian lattice. On leave of absence from Beijing Graduate S...

In this paper, we consider the relationships between the second order linear recurrences, and the generalized doubly stochastic permanents and determinants. 1. Introduction The Fibonacci sequence, fFng ; is de…ned by the recurrence relation, for n 1 Fn+1 = Fn + Fn 1 (1.1) where F0 = 0; F1 = 1: The Lucas Sequence, fLng ; is de…ned by the recurrence relation, for n 1 Ln+1 = Ln + Ln 1 (1.2) where ...

We read with interest the article by Dheda et al who followed our approach for a rapid diagnosis of smear-negative tuberculosis by bronchoalveolar lavage (BAL) enzyme-linked immunospot (ELISpot) in a country of high tuberculosis incidence, including individuals with HIV-1 infection. The authors report a sensitivity of 88.9% and specificity of 94.7% of the BAL ELISpot (T-SPOT.TB test) for the di...

<p><span lang="EN-US">The world is currently being hit by the COVID-19 pandemic, which threatens human civilization. The presence of this pandemic has had a multi-sectoral impact and slowed globalization. This research intended to provide an overview how globalization will continue despite global challenges, especially pandemic. was conducted using qualitative approach conducting in...