We have performed Monte Carlo simulations of interacting dipoles that relax through quantum tunneling. We aim to mimic tunneling experiments on crystals of magnetic clusters, such as Fe(8), at very low temperatures. Accordingly, we allow spin flips only if the corresponding energy change is less than some 2 delta h(hf). Time evolutions of the dipolar field distribution P(t)(H) are studied. As i...

The pH dependence of transport of the neutral amino acids L-serine and L-alanine by membrane vesicles of Streptococcus cremoris have been studied in detail. The rates of four modes of facilitated diffusion (e.g., influx, efflux, exchange, and counterflow) of L-serine and L-alanine increase with increasing H+ concentration. Rates of artificially imposed electrical potential across the membrane (...

P element dysgenesis-associated male recombination in Drosophila was examined with a selective system focused upon a section of the third chromosome divided into eight recombination segments. Tests compared crossing over in the presence of none, one and two doses of P(delta 2-3)(99B), a non-mobile transposase source, in the absence of a mobilizable P element target in the genome. In the presenc...

BACKGROUND The number of skin conductance fluctuations (NSCF) expresses sympathetic skin nerve activity. The response entropy (RE) measures electromyographic and electroencephalographic activity in the forehead. The state entropy (SE) measures mainly electroencephalographic activity. When the suppression of frontal muscular activity is complete, RE is equal to SE. RE-Delta is defined as SE minu...

Given a convex $n$-gon $P$ and positive integer $m$ such that $3\le m\le n-1$, let $Q$ denote the largest area $m$-gon contained in $P$. We are interested minimum value of $\Delta(Q)/\Delta(P)$, ratio areas these two polygons. More precisely, given integers $n$ $m$, with $3 \le m define \begin{equation*} f_n(m)=\min_{P\in \mathcal {P}_n} \max_{Q \subset P,|Q|=m} \frac{\Delta(Q)}{\Delta(P)} \end...

While awaiting direct velocity measurement of gas motions in the hot intracluster medium, we rely on indirect probes, including perturbations galaxy clusters. Using a sample $\sim 80$ clusters different dynamic states from Omega500 cosmological simulations, examine scaling relations between fluctuation amplitudes density, $\delta\rho/\rho$, pressure, $\delta P/P$, X-ray surface brightness, Suny...

Let G = (V, E) be a graph. Let k ≤ |V | be an integer. Let O k be the number of edge induced subgraphs of G having k vertices and an odd number of edges. Let E k be the number of edge induced subgraphs of G having k vertices and an even number of edges. Let ∆ k = O k − E k. The Odd Even Delta problem consists in computing ∆ k , given G and k. We show that such problem is #P-hard, even on 3-regu...

The Delta-P [1] approach relies on Semantic Web notations and techniques to perform comparison of potentially complex models. The key feature of the approach is to allow for flexible adaptation, by using queries to detect changes relevant to different schemata. Although the approach was originally oriented to software process models, in this paper we concentrate om its potential applications to...