In this article, we review the advances that have been made on the understanding of the high-pressure (HP) structural, vibrational, and electronic properties of wolframite-type oxides since the first works in the early 1990s. Mainly tungstates, which are the best known wolframites, but also tantalates and niobates, with an isomorphic ambient-pressure wolframite structure, have been included in ...

The objective of this paper is to computationally analyse shock waves in the Convergent Divergent (CD) Nozzle. The commercial CFD code Fluent is employed to analyse the compressible flow through the nozzle. The analysis includes static pressure, temperature, Mach number and density of the flow for different nozzle pressure ratios (NPR i.e., the ratio between exit pressure of the nozzle to ambie...

This paper proposes a method for obstacle detection on a runway for autonomous navigation and landing of an aircraft. Detection is done in presence of extraneous features such as tire-marks. Suitable features are extracted from the image and warping using approximately known camera and plane parameters is performed in order to compensate ego-motion as far as possible. Residual disparity after w...

While a new tire may have excellent resistance to crack initiation and propagation between the steel belts, an aged tire of the exact same construction can exhibit dramatically reduced crack growth resistance, which in some cases may contribute to tire failure. This article will review the research that has gone into quantifying the rate of oxidation the steel belt rubber oxidizes in different ...

As the ion density at a solid–liquid interface changes, the interfacial tension varies accordingly, which can lead to a large energy density output, particularly when amplified by the high specific surface area of a nanoporous material. This concept is validated by the results of a controlled-temperature infiltration experiment on a hydrophobic zeolite immersed in a saturated aqueous solution o...

Three-DOF linear TPMs (translational parallel manipulators) refer to TPMs whose forward displacement analysis can be performed by solving a set of linear equations. Based on the results of the type synthesis of TPMs, the method for the type synthesis of linear TPMs composed of R (revolute) and P (prismatic) joints and the displacement group theory, this paper deals with the type synthesis of li...

Centrifugal compressors are a key piece of equipment for modern production. Among the components of the centrifugal compressor, the impeller is a pivotal part as it is used to transform kinetic energy into pressure energy. Blade crack condition monitoring and classification has been broadly investigated in the industrial and academic area. In this research, a pressure pulsation (PP) sensor arra...

Intradialytic hypotension (IDH) remains the most common severe side effect of hemodialysis despite numerous technological advancements. Recent evidence emphasizes the significance of asymptomatic hypotensive episodes, as well as the hypoperfusive consequences of both relative blood pressure drops and repetitive, symptomatic events. This article reviews the physiological importance of rapid bloo...

X-ray in situ studies in electrically and laser-heated diamond anvil cells (DACs) at pressures over 80 GPa and temperatures above 2500 K were used to determine stable silica phase at extreme conditions. We demonstrate that so far unidenti®ed phases obtained on the compression of a-cristobalite, new dense silica polymorph in the Martian Shergotty meteorite, and controversial post-stishovite phas...

......................................................................................................1 0 Chapter 1: Introduction ................................................................................................................. 12 1.1 Diabetes and the impact of plantar foot ulcers ................................................................. 12 1.2 Aetiology of ulceration in...