Background: Cobalamin deficiency and peripheral neuropathy (PN) are commonly seen in HIV-infected adults. The level of urine methylmalonic acid (UMMA), a reliable indicator of tissue cobalamin status, was determined in HIV infected subjects with and without PN to establish this association. Methods: One hundred and ninety-eight (198) consenting HIV infected subjects with and without PN were rec...

Let E = ((eij))n×n be a fixed array of real numbers such that eij = eji, eii = 0 for 1 ≤ i, j ≤ n. Let the symmetric group be denoted by Sn and the collection of involutions with no fixed points by Πn, that is, Πn = {π ∈ Sn : π 2 = id, π(i) 6= i∀i}. For π uniformly chosen from Πn, let YE = Pn i=1 eiπ(i) and W = (YE − μE)/σE where μE = E(YE) and σ 2 E = Var(YE). Denoting by FW and Φ the distribu...

In this paper, utilization of clustering algorithms for data fusion in decision level is proposed. The results of automatic isolated word recognition, which are derived from speech spectrograph and Linear Predictive Coding (LPC) analysis, are combined with each other by using fuzzy clustering algorithms, especially fuzzy k-means and fuzzy vector quantization. Experimental results show that the ...

We present a class of subposets of the partition lattice 5n with the following property: The order complex is homotopy equivalent to the order complex of 5n−1, and the Sn-module structure of the homology coincides with a recently discovered lifting of the Sn−1-action on the homology of5n−1. This is the Whitehouse representation on Robinson’s space of fully-grown trees, and has also appeared in ...

For a fixed unit vector a= (a1, a2, . . . , an) ∈ Sn−1, that is, ∑i=1 ai = 1, we consider the 2n signed vectors ε = (ε1, ε2, . . . , εn) ∈ {−1, 1}n and the corresponding scalar products a · ε = ∑i=1 aiεi. In [3] the following old conjecture has been reformulated. It states that among the 2n sums of the form ∑±ai there are not more with ∣ ∣∑i=1±ai ∣ ∣ > 1 than there are with ∣ ∣∑i=1±ai ∣ ∣≤ 1. T...

A partition λ of a positive integer n is a sequence λ1 λ2 λm 0 of integers such that ∑λi n. For a positive integer p, a partition λ λ1 λ2 λm (or its Young diagram) is called p-regular if it does not have p or more equal parts, i.e. if there does not exist t m p 1 with λt λt 1 λt p 1. Let F be a field of characteristic p 0. It is well known that irreducible representations of the symmetric group...

We consider a transient random walk on Z which is asymptotically stable, without centering, in a sense which allows di¤erent norming for each component. The paper is devoted to the asymptotics of the probability of the …rst return to the origin of such a random walk at time n. 60G50 multidimensional random walk, transience, …rst return to the origin, local limit theorem, defective renewal funct...