BACKGROUND Retinal implants have been developed to treat blindness causing retinal degenerations such as Retinitis pigmentosa (RP). The retinal stimulators are covering only a small portion of the retina usually in its center. To restore not only central vision but also a useful visual field retinal stimulators need to cover a larger area of the retina. However, large area retinal stimulators a...

Objective estimates of activity patterns and energy expenditure (EE) are important for the measurement of energy balance. The Intelligent Device for Energy Expenditure and Activity (IDEEA) can estimate EE from the thirty-five postures and activities it can identify and record. The present study evaluated the IDEEA system's estimation of EE using whole-body indirect calorimetry over 24 h, and in...

almost all countries in the world are party to the rio conventions. this entails a number of responsibilities, including reporting periodically on aspects of environmental health and national implementation of the convention. these reports can cover hundreds of pages, so completing reports is often a significant undertaking. since countries can be party to numerous multilateral environmental ag...

If sustainable development is about the integration of economic and environmental goals, then there seems to be a signiacant lack of integration between the preeminent global governance structures set up to manage trade and environment respectively. The international trade regime has evolved into one of the most powerful and inouential multilateral regimes in the world today in terms of its abi...

In this work, platinum group metal (PGM) free-based cathode active layers were prepared using different printing techniques. The membrane electrode assemblies (MEAs) integrate a PGM free catalyst based on Fe, N and C atoms at the side. Scanning electron microscopy (SEM) images of MEA cross sections showed strong impact fabrication process structure, porosity ionomer repartition. MEAs characteri...

introduction: depressive disorder is a prevalent psychiatric disorder, which affects 21% of the world population. the presently using drugs can impose a variety of side-effects including cardiac toxicity, hypopiesia, sexual dysfunction, body weight gain, and sleep disorder. during the last decade, there is a growing interest in the therapeutic effects of natural products on mental disorders. am...

We review recent research into oxides of platinum group metals (pgms), in particular those ruthenium and iridium, for use as electrocatalysts the oxygen evolution reaction (OER). These are used membrane electrode assemblies (MEAs) devices such electrolysers, water splitting to generate hydrogen fuel, fuel cells where they provide a buffer against carbon corrosion. In these situations, proton ex...

Understanding phase stability and precipitation at intermediate temperatures is crucial for tailoring microstructures mechanical properties of L12-strengthened multicomponent alloys. In this study, the precipitate type, morphology, distribution (CoCrNi)100−2x(AlTi)x (x = 3, 5, 7 at.%) medium-entropy alloys (MEAs) 600-900 °C were systematically investigated through a combination scanning electro...

Based on experiments performed with high-resolution Active Pixel Sensor microelectrode arrays (APS-MEAs) coupled with spontaneously active hippocampal cultures, this work investigates the spatial resolution effects of the neuroelectronic interface on the analysis of the recorded electrophysiological signals. The adopted methodology consists, first, in recording the spontaneous activity at the h...

Title of Document: IN SITU PROCESSING OF PtSn ELECTROCATALYSTS FOR CO TOLERANCE IN PEM FUEL CELLS Robert Utz, Master of Science, 2011 Directed By: Professor Greg Jackson Department of Mechanical Engineering Improved anode CO tolerance is a promising approach for integrating lowtemperature PEM fuel cells with hydrocarbon fuel processors in cost-effective systems for portable and stationary power...