In this paper, we describe an approach for understanding transcriptional regulation from both gene expression and promoter sequence data. We aim to identify transcriptional modules--sets of genes that are co-regulated in a set of experiments, through a common motif profile. Using the EM algorithm, our approach refines both the module assignment and the motif profile so as to best explain the ex...

An ontogenetic study of ecto-ATPase activity and the content of enzyme proteins was assessed in the caudate nucleus and hippocampal synaptic plasma membranes isolated from rats at various ages (15, 30, 90, 180 and 365 days). The ontogenetic profile revealed that the enzyme activities in both brain areas were the highest on day 30 and 365, while the ecto-ATPase protein abundance was the highest ...

Abstract Much of our current understanding continental topographic evolution is rooted in measuring and predicting the rates at which rivers erode landscape. Flume tank field observations indicate that stochasticity local conditions play important roles determining small scales (e.g., <10 km, thousands years). Obversely, preserved river profiles common shapes atop uplifting topography er...

During sputter deposition of metal layers bulges at sharp convex corners can arise and are observed after metalization of contact holes for semiconductor circuits. We present an explanation of this phenomenon by assuming that in process steps prior to the deposition a ledge is formed . This assumption together with the choice of an appropriate model for the distribution of the incident particle...

We propose an explanation to the appearance of a wide blue absorption wing in the He I λ10830Å P Cygni profile of the massive binary star η Car several months before periastron. We assume that the mixing regions of the two wind is accelerated by the secondary’s wind to ∼ 1800 km s, and is responsible for the absorption. We also assume that the secondary star is toward the observer at periastron...

Light emission from a quantum well-dot structure comprising amorphous Si nanoparticles (∼1.4 nm) embedded in SiC/SiN(x) multilayers (a few tens nm thick for individual sublayers) was investigated. Strong blue-green photoluminescence was measured at room temperature on the as-deposited samples and the spectral profile shows some markedly modulated features. It displays flattened profiles of roug...

The subsurface elastic stress fields in plane and axisymmetric contacts with friction under oscillating tangential loading are calculated via a very robust, high-precision method, which operates appropriate superpositions of analytic solutions for the respective Hertzian contact problems. Based on fields, two critical fatigue crack initiation criteria—the Smith-Watson-Topper (SWT) parameter Fin...

ion Rule

Abstract Soil, is a reclamable and sustainable source. it is the basis of survival and it’s implication, should be performed on the basis of productivity identification according to scientific and technical rules, we can protect this valuable source, and increase it’s productivity and usage. Nowdays, saline soils cover nearly 14.6% of the country area. Study areas (Kashan’ playa) have saline ...