Trapping effects on two AlGaN/GaN Schottky diodes with a different composition of the AlGaN barrier layer were analyzed by current transient spectroscopy. The current transients were measured at a constant bias and at six different temperatures between 25 and 150 ̋C. Obtained data were fitted by only three superimposed exponentials, and good agreement between the experimental and fitted data wa...

Connectivity is a critical measure affecting the evolution and ecology of species. The purpose of this thesis was to assess connectivity between populations of Stegastes partitus at seven sites along the Mesoamerican barrier reef. First, seven novel microsatellite markers were developed to allow the assessment of genetic population structure in S. partitus in conjunction with existing markers. ...

In this paper, interstitial migration generated by scattering with a mobile breather is investigated numerically in a Frenkel-Kontorova one-dimensional lattice. In accordance with experimental results it is shown that interstitial diffusion is likely and faster than vacancy diffusion. Our simulations supports the hypothesis that a long-range energy transport mechanism involving moving nonlinear...

Introduction Measuring the mean apparent diffusion coefficient (ADC) provides valuable contrast in studying disease processes such as stroke and tumours. ADC is usually measured by acquiring a reference image and 3 images with diffusion weighting (DW) applied in 3 orthogonal directions. ADC is then defined as the mean of the 3 diffusivity maps. This can be time consuming, and single-shot method...

Introduction Choroidal melanoma is the most common intraocular malignancy . Diffusion weighted MRI (DWI) and the derived apparent diffusion coefficient (ADC) map has proven to be useful in tumor identification and treatment response monitoring . However, DWI of intraocular tumor, such as choroidal melanoma, has not been reported to date. The objective of the present study is to quantify ADC of ...

Diffusion MRI has been used worldwide to produce images of brain tissue structure and connectivity, in the normal and diseased brain. Diffusion MRI has revolutionized the management of acute brain ischemia (stroke), saving life of many patients and sparing them significant disabilities. In addition to stroke, diffusion MRI is now widely used for the detection of cancers and metastases (breast, ...

An attempt has been made to assess the validity of applying the frictional and viscous coefficients of bulk water to the movement of water and solutes through the urinary bladder of the toad. The temperature dependence of diffusion of THO, C(14)-urea, C(14)-thiourea, and net water transfer across the bladder was determined in the presence and absence of vasopressin. The activation energy for di...

Using aqueous and vitreous fluorophotometry, the authors examined the blood-aqueous and bloodretinal barrier functions in three groups of pigmented rabbits. Epinephrine (1.25%) was applied topically five times daily and indomethacin (0.5% sesame oil suspension) was applied topically three times daily to one eye of each of the animals in Group 1; under the same regimen, epinephrine and indometha...

An innovation-diffusion model was developed with agent-based modelling (ABM); the model is used to study technical innovation and its diffusion process in China. The results are as follows: only a small fraction of firms conduct independent product-innovation, and most firms prefer imitation and/or purchases; most of the innovative firms are located in the East; approximately three or four tech...