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We present a novel denoising scheme via Radon transform-based adaptive vector directional median filters named adaptive directional vector median filter (AD-VMF) to suppress noise for microseismic downhole dataset. AD-VMF contains three major steps for microseismic downhole data processing: (i) applying Radon transform on the microseismic data to obtain the parameters of the waves, (ii) performing...
The composition and structure of soluble monolayers of cationic surfactants of alkyltrimethyl ammonium bromide adsorbed at the air-water interface have been studied by the neutron reflection technique. — At the critical micelle concentration (CMC) the area per surfactant molecule was found to be 55 ± 3 Å2 for decyl trimethyl ammonium bromide (C10TAB), 48 ± 3 Å2 for tetradecyl trimethyl ammonium bromide...
Neutron reflectivity measurements have been used to study the monolayer of AOT adsorbed at the air-water interface at its critical micelle concentration (CMC=2.45×10−3 M). Isotopic substitution has been used to label different parts of the AOT and to locate different groups within the surface region. For the saturated monolayer the thickness was found to be 18±1 Å and the area per molecule 78±2 Å2...
Neutron reflection has been used to explore the action of C12E5 on olive oil films coated on SiO2. The measurements were made at the solid/solution interface at the CMC of C12E5 with the oil films fixed at 50 Å and 200 Å dry thickness. It was found that the total amount of C12E5 interacting with the oil was higher for the thicker film and that the ratio of absorption to surface adsorption was 32....
A novel diblock copolymer, consisting of a biocompatible phosphorylcholine block (MPC) and a pH sensitive dimethylamino ethyl block (DMA), denoted as MPC30DMA60, shows interesting properties of surface adsorption and solution aggregation. These features have been exploited to condense DNA into nanoaggregates in bulk solution and to immobilise DNA onto a substrate surface. These molecular manipulations...
A novel diblock copolymer, consisting of a biocompatible phosphorylcholine block (MPC) and a pH sensitive dimethylamino ethyl block (DMA), denoted as MPC30DMA60, shows interesting properties of surface adsorption and solution aggregation. These features have been exploited to condense DNA into nanoaggregates in bulk solution and to immobilise DNA onto a substrate surface. These molecular manipulations...
The coverage and structure of caesium dodecyl sulphate (CsDS) and polyethylene oxide (PEO) in mixed monolayers formed at the air-water interface have been determined directly using neutron reflection in combination with deuterium labelling. At a fixed PEO concentration of 0.1 wt%, the variation of surface tension with concentration of CsDS showed two discontinuities, the first (x1) corresponding...
Neutron reflection has been used to explore the action of C12E5 on olive oil films coated on SiO2. The measurements were made at the solid/solution interface at the CMC of C12E5 with the oil films fixed at 50 Å and 200 Å dry thickness. It was found that the total amount of C12E5 interacting with the oil was higher for the thicker film and that the ratio of absorption to surface adsorption was 3 2...
The work reported here shows a direct experimental comparison of the sensitivities of AlN solidly mounted resonators (SMR)-based biosensors fabricated with standard metal electrodes and with carbon nanotube electrodes. SMRs resonating at frequencies around 1.75 GHz have been fabricated, some devices using a thin film of multi-wall carbon nanotubes (CNTs) as the top electrode material and some identical...
FBAR devices with carbon nanotube (CNT) electrodes have been developed with the aim of taking advantage of the low density and high acoustic impedance of the CNTs compared to other known materials. The influence of the CNTs on the frequency response of the FBAR devices was studied by comparing two identical sets of devices, one set comprised FBARs fabricated with chromium/gold bilayer electrodes,...
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