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HF radar systems are increasingly used as components of coastal monitoring systems but the accuracy of the measurements can be compromised if there are other significant non-wave targets (e.g. ships or wind turbines) in the field of view. Liverpool Bay, on the North West coast of England and Wales, is an area of significant wind farm development and is also the site of an HF radar deployed as part...
We present an information flow control (IFC) system which monitors information leakage in single-threaded Java programs. Our implementation uses the Java Virtual Machine Tool Interface (JVMTI) and adapts the algorithms of Le Guernic et al. for this purpose. We also offer a generic rule set for enforcing IFC. One advantage of our approach is that it is dynamic, so that we are only concerned with the...
Migration from the previous generation of Advent Solar emitter wrap-through (EWT) cells to the current technology platform based on 243 cm2 multicrystalline Si cells and monolithically interconnected cell and encapsulated modules has brought with it significant performance increases. Extraction of current from multiple contact pads distributed on the cell rear, optimization of the emitter through-holes,...
Summary form only given. We have recently been developing Photo-Multiplier Tubes (PMTs) with improved temporal responses for the detection of Cherenkov light in a Gamma Reaction History diagnostic to be fielded on the National Ignition Facility. A Gas Cherenkov Detector has been fielded on the Omega Laser Facility, where reaction histories in the order of a few hundred picoseconds have been measured...
A combination low noise amplifier (LNA) and diversity switch (diversity LNA) is presented, allowing the switching between two spatially separated antennas to improve the received SNR in a multipath environment. This 60 GHz diversity LNA has a simulated gain of 14.3 dB and noise figure o f8.9 dB. It is suitable for diversity of reception implementation for a complete system-on-chip (SOC) in the 60...
In this working paper, we propose a location determination system, uni-access, which provides location information while still respecting the location privacy of the user. The uni-access system takes into account legislation, corporate policies and user input to define a set of rules for location privacy. In addition to location determination services, uni-access incorporates an intrusion detection...
In this paper, we describe a remote networking lab (RNL) which we find useful for teaching networking subjects in distance education (DE) mode. The RNL enables students to work in a networking laboratory (via the Internet) as if physically located next to the equipment. We discuss the architecture and operational features of the RNL and the educational value it provides. We also describe some of the...
A pilot Coastal Observatory has been established in Liverpool Bay, which integrates (near) real-time measurements with coupled models in a pre-operational coastal prediction system and displays the results on the web. The aim is to understand a coastal sea's response to natural forcing and the consequences of human activity. The eastern Irish Sea is an excellent study area, affected by all coastal...
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