Dimensionality reduction strategies for land use land cover classification based on airborne hyperspectral imagery: a survey.

Hyperspectral image (HSI) contains hundreds of adjacent spectral bands, which can effectively differentiate the region of interest. Nevertheless, many irrelevant and highly correlated spectral bands lead to the Hughes phenomenon. Consequently, hyperspectral image dimensionality reduction is necessary to select the most informative and significant spectral band and eliminate the redundant spectral band.

Beat-to-beat blood pressure measurement using a cuffless device does not accurately reflect invasive blood pressure.

Background: The availability of an accurate continuous cuffless blood pressure (BP) monitor would provide an alternative to both invasive continuous BP and 24-h intermittent cuff-based BP monitors. We investigated the accuracy of a cuffless beat to beat (BtB) device compared to both invasive BP (iBP) and brachial cuff BP (cBP) measurements.

Methods: Patients undergoing clinically indicated coronary angiography (CA) and/or percutaneous coronary intervention (PCI) were recruited.

Correlation between epicardial adipose tissue and body mass index in New Zealand ethnic populations.

Aim: We aimed to investigate the correlation between epicardial adipose tissue (EAT) and body mass index (BMI) in different ethnic groups in New Zealand.

Methods: The study included 205 individuals undergoing open heart surgery. Māori and Pacific groups were combined to increase statistical power.

Relationship between epicardial adipose tissue thickness and epicardial adipocyte size with increasing body mass index.

Macroscopic deposition of epicardial adipose tissue (EAT) has been strongly associated with numerous indices of obesity and cardiovascular disease risk. In contrast, the morphology of EAT adipocytes has rarely been investigated. We aimed to determine whether obesity-driven adipocyte hypertrophy, which is characteristic of other visceral fat depots, is found within EAT adipocytes.

Myocardial tissue characterisation using echocardiographic deformation imaging.

Myocardial pathology results in significant morbidity and mortality, whether due to primary cardiomyopathic processes or secondary to other conditions such as ischemic heart disease. Cardiac imaging techniques characterise the underlying tissue directly, by assessing a signal from the tissue itself, or indirectly, by inferring tissue characteristics from global or regional function. Cardiac magnetic resonance imaging is currently the most investigated imaging modality for tissue characterisation, but, due to its accessibility, advanced echocardiography represents an attractive alternative.

Myocardial global longitudinal strain: An early indicator of cardiac interstitial fibrosis modified by spironolactone, in a unique hypertensive rat model.

Objectives: Is global longitudinal strain (GLS) a more accurate non-invasive measure of histological myocardial fibrosis than left ventricular ejection fraction (LVEF) in a hypertensive rodent model.

Background: Hypertension results in left ventricular hypertrophy and cardiac dysfunction. Speckle-tracking echocardiography has emerged as a robust technique to evaluate cardiac function in humans compared with standard echocardiography.

A group based key sharing and management algorithm for vehicular ad hoc networks.

Vehicular ad hoc networks (VANETs) are one special type of ad hoc networks that involves vehicles on roads. Typically like ad hoc networks, broadcast approach is used for data dissemination. Blind broadcast to each and every node results in exchange of useless and irrelevant messages and hence creates an overhead.

Arriving safely and avoiding a puncture: use of a Radi PressureWire to cross an ATS prosthetic aortic valve for direct measurement of left ventricular pressure.

The direct measurement of left ventricular pressure in the presence of a mechanical aortic valve is a technical challenge for the interventional cardiologist. Direct recording, which is rarely performed, becomes necessary when other imaging methods have failed to evaluate prosthetic valve stenosis or restrictive physiology. Left ventricular pressure has typically been measured after transseptal or direct left ventricular apical puncture.