Materials Literature
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The Diels-Alder surface modified top epitaxial graphene layer, with newly created pair of sp3 carbon centres, results in abrupt minimization of interlayer van der Waals interactions between two stacked graphene planes, and escapes the wafer during post-reaction manipulation stage, leaving the layer under it almost pri…
Irbesartan is a poorly water soluble drug practically insoluble in water. The objective of the study is to improve the solubility of irbesartan by using solubility enhancer as β-cyclodextrin and also to study the effect of water soluble polymer as PEG 400, Cremophore RH 40, PVP K 30, HPMC, soluplus on solubility of ir…
Processing Large RDF Graphs on Hadoop Anduin is a lightweight and concise tool to process RDF/N-Quads as well as RDF/NTriples formatted data using Hadoop. Anduin is written in Scala and built atop Scalding, a library from Twitter. Current Version 0.3.1 Features Support of RDF/N-Quads and RDF/NTriples formats Tolerant…
We have investigated the bulk modulus and thermal properties of La1-xSmxCoO3 ( 0≤x≤0.2 ) at temperatures 1 K≤T≤300 K probably for the first time by incorporating the effect of lattice distortions using the modified rigid ion model (MRIM). The calculated specific heat, thermal expansion, bulk modulus, and other thermal…
Abstract : Presented is our scientific progress in two areas of research. The first is coherent acoustic phonon (CAP) spectroscopy of diamond crystals. We showed an ion implantation process significantly modifies the acousto-optical structure of diamond, resulting in a variety of features in the observed CAP spectra.…
In this study the graphene supported Au-Cu catalysts (denoted as AuCu/GR) with different Au:Cu molar ratio were prepared by microwave heating of Au(III) and Cu(II) salts in ethylene glycol (EG) solutions at 150 oC for 30 min. It has been determined that the composition of AuCu/GR catalysts depends on pH of reaction mi…
Pipeline operators have at their disposal multiple resources for evaluating the integrity of identified features and anomalies. With advances in in-line inspection technology, the pipeline industry is being called upon to evaluate an ever-increasing number of features. When a feature is identified as a threat and seve…
It has been well documented that slab internal quality is one of the key factors for reduced susceptibility of hydrogen induced cracking (HIC) in line pipe steels designed for sour gas service. In addition, the creation of a homogeneous microstructure which is heavily influenced by the slab internal quality is also a…
The purpose of the research was to produce nanofiber-modified paper with enhanced strength. The materials used in the research were cotton-comber pulp and a composite of PLA (polylactic acid) and PHB (polyhydroxybutyrate) nanofibers. Two sets of test sheets were formed: from the pure cotton-comber pulp and from the co…
The System Wide Risk Assessment (SWRA) is an essential first step in the pipeline integrity management program. It is required by both Canadian and US regulators and is expected to estimate risk due to all threats, interaction of threats, and consequences. The main objective of the SWRA is to identify high risk segmen…
The types of defects that have caused in-service failures and hydrostatic test failures of natural gas and hazardous liquid pipelines comprised of electric resistance welded (ERW) or flash-welded seams were revealed by a study of 569 seam failure incidents that occurred over a period from the 1940s through the present…
The problem of technical condition identification of aging oil pipelines in Russian Federation and in the world is relevant, since a significant number of them have been in service for over 30 years. More and more of them are getting closer to running out of normative resources. Within a method for reducing the size o…
A combination of micro- and macro-scale structural characterization methods was implemented for clarification of the influence of different sintering atmospheres on the structural properties of Pb1−xLax(ZryTi1−y)O3 (PLZT) fibers. Three powders, PbZrO3 and ZrO2 (PZ + Z), PbZrO3 (PZ), and PbZrO3 + PbO (PZ + P), were use…
In order to optimize cost and performance of high pressure gas pipelines by reducing the wall thickness, pipeline companies are considering the use of higher grade (X70 or above) steels or a composite pipe of thin steel liner and fiber wrap. The use of high strength steels and thinner pipes can result in challenges wh…
The track record of in-line inspection crack detection technology with respect to locating and characterizing seam defects in electric-resistance-welded (ERW) pipe was examined on the basis of 13 tool runs on 741 miles of hazardous liquid and natural gas pipelines. Results for three types of tools were examined: (ultr…
This work addresses a two-parameter description of crack-tip fields in bend and tensile fracture specimens incorporating the evolution of near-tip stresses following stable crack growth with increased values of the crack driving force as characterized by the J-integral. The primary objective of this study is to assess…
The first mineral based lacquer and paint coating have been developed based on Portland cement and soda glass, which does not require traditional silicators of zinc oxide and is also capable of absorbing man-made radiation. A significant change in the structure of silicate paint has been achieved by its modification w…
The most critical component of external corrosion prevention on pipeline is the protective coating system. The coating selection process can be extremely challenging due to the sheer number of manufacturers and products/options that are offered — often with limited performance data available. Relying solely on manufac…
The benefits of mechanized welding for pipeline construction are well known, as reflected by the high industrial acceptance and usage of its variations. However, the engineering and qualification costs associated with the preparation of alternative acceptance criteria for typical pulsed and short-circuit MIG (GMAW-P a…
Steel pipelines used for transporting oil and gas can develop various damages such as mechanical damages, corrosion, wrinkle, and crack. One of the mechanical damages is a dent with or without other defects such as corrosion, gouge, and crack. The dent without other defect is often referred to as plain dent. Depending…