eGaN FETs are available in a Wafer Level Chip-Scale Package (WLCSP) with terminals in a Land Grid Array (LGA) format. Some of these devices do not offer a separate gate-return source pin, but rather a number of very low inductance LGA solder bars as shown in figure 1. These parts can be treated in the same way as one provided with a dedicated gate return pin or bar, by allocating the source pad...

Using self-consistent cosmological simulations of disc galaxy formation, we analyse the 1.4 GHz radio flux from high-redshift progenitors of present-day normal spirals within the context of present-day and planned next-generation observational facilities. We demonstrate that while current radio facilities such as the Very Large Array (VLA) are unlikely to trace these progenitors beyond redshift...

The reliable quantification of ultraviolet (UV) radiation at the earth’s surface requires accurate measurements of spectral global solar UV irradiance in order to determine the UV exposure to human skin and to understand long-term trends in this parameter. Array spectroradiometers (ASRMs) are small, light, robust and cost-effective instruments, and are increasingly used for spectral irradiance ...

This paper raises the design of an ultrasonic array for obstacle detection based on Phased Array (PA) techniques, which steers the acoustic beam through the environment by electronics rather than mechanical means. The transmission of every element in the array has been encoded, according to Code Division for Multiple Access (CDMA), which allows multiple beams to be transmitted simultaneously. A...

The Telescope Array (TA) has observed a statistically significant excess in cosmic-rays with energies above 57 EeV in a region of approximately 1150 square degrees centered on coordinates (R.A. = 146.7, Dec. = 43.2). We note that the location of this excess correlates with two of the 28 extraterrestrial neutrinos recently observed by IceCube. The overlap between the two IceCube neutrinos and th...

As in binary, a multiple-valued programmable logic array (PLA) realises a sum-ofproducts expression specified by the user. However, in multiple-valued logic, there are many more operations than in binary, and an important question is the choice of operations which provides the greatest number of functions for a given chip area. In this paper, we analyse various PLA configurations using operatio...

The first generation of epoch of reionization experiments have the potential to characterize the processes and history of reionization for redshifts 6 < z < 12 by observing the power spectrum of the redshifted 21 cm radiation. These power spectrum observations could also contribute to our knowledge of the underlying cosmology, particularly at redshifts before the effects of reionization strongl...