Neural mechanisms that underlie language disability in autism spectrum disorder (ASD) have been associated with reduced excitatory processes observed as positive blood oxygen level dependent (BOLD) responses. However, negative BOLD responses (NBR) associated with language and inhibitory processes have been less studied in ASD. In this study, functional magnetic resonance imaging showed that the...

This paper investigated the mechanism of enhancing mechanical and tribological properties nitrile rubber (NBR) via addition nano-SiO2 on molecular scale. Molecular dynamics (MD) simulations were performed structure models pure NBR, NBR/SiO2, three-layer friction pairs. The results showed that hydrogen bonds interfacial interaction between NBR chains decreased fractional free volume nanocomposit...

BACKGROUND The most frequently observed major consequences of ionizing radiation are chromosomal lesions and cancers, although the entire genome may be affected. Owing to its haploid status and absence of recombination, the human Y chromosome is an ideal candidate to be assessed for possible genetic alterations induced by ionizing radiation. We studied the human Y chromosome in 390 males from t...

Ordinary least square (OLS) in regression has been widely used to analyze patient-level data in cost-effectiveness analysis (CEA). However, the estimates, inference and decision making in the economic evaluation based on OLS estimation may be biased by the presence of outliers. Instead, robust estimation can remain unaffected and provide result which is resistant to outliers. The objective of t...

Neste trabalho é proposto um método simples e verde para a determinação do índice de acidez do biodiesel. A amostra é dissolvida em solução 1:1 v/v etanol:água, evitando a mistura tolueno:isopropanol:água (1:0,95:0,5 v/v/v) usada nas normas atuais. A titulação é realizada com uma solução aquosa de NaOH 0,02 mol L. O método foi comparado com o da ABNT NBR 14448, que é similar ao do ASTM D 664 e ...

Remote sensing using Landsat Thematic Mapper (TM) satellite imagery is increasingly used for mapping wildland fire burned area and burn severity, owing to its frequency of collection, relatively high resolution, and availability free of charge. However, rapid response of vegetation following fire and frequent cloud cover pose challenges to this approach in the southeastern US. We assessed these...

For the first time, acrylonitrile–butadiene rubber (NBR)–graphene oxide (GO) and reduced graphene (rGO) composites were prepared without cure activators: zinc oxide/stearic acid (ZnO/SA) studied. The vulcanization characteristics of compounds systematically studied at 160–190°C, with aid rheometer differential scanning calorimetry (DSC) techniques. NBR revealed rapid curing time (t90) greater r...

in this work, leather fibers were employed as a component of elastomeric compounds based on nbr, cr and epdm and studied were made on their effects upon curing characteristics and mechanical properties of the prepared compounds. evaluation of curing characteristics of the compounds demonstrated that leather fibers have no considerable effect on initial viscosity and curing time of the compounds...

Allyl N-tosyloxycarbamates are found to be catalytically transformed into β-brominated oxazolidinones with FeBr(2)/n-Bu(4)NBr in t-BuOH.

We consider the problem of tensor rank. We define tensor rank, discuss the motivations behind exploring the topic, and give some examples of the difficulties we face when trying to compute tensor rank. Some simpler lower and upper bounds for tensor rank are proven, and two techniques for giving lower bounds are explored. Finally we give one explicit example of a construction of an n×n×n tensors...