A5055019428- Water Quality Monitoring and Analysis
- Analytical Chemistry and Sensors
- Advanced Optical Sensing Technologies
- Astro and Planetary Science
- Space Satellite Systems and Control
- Analytical Chemistry and Chromatography
- Ocular and Laser Science Research
- Spectroscopy and Chemometric Analyses
- Pesticide Residue Analysis and Safety
- Analytical Methods in Pharmaceuticals
- Spacecraft Design and Technology
- Antibiotics Pharmacokinetics and Efficacy
- Laser Design and Applications
- Planetary Science and Exploration
- Photonic Crystals and Applications
- Electrochemical Analysis and Applications
- Analytical chemistry methods development
- Advanced Chemical Sensor Technologies
- Advanced Fiber Laser Technologies
- Spacecraft and Cryogenic Technologies
- Inorganic Fluorides and Related Compounds
- Chromatography in Natural Products
- Superconductivity in MgB2 and Alloys
- Bioactive Compounds and Antitumor Agents
- Graphite, nuclear technology, radiation studies
University of St Andrews
2024
Defence Science and Technology Laboratory
2014-2021
Airbus (United Kingdom)
2016-2019
Airbus (France)
2017
Barnardo's
1978-2007
Utrecht University
2006
McGill University
2000
Barnard College
1985-1992
University of Hertfordshire
1987
Abstract Radioisotope power systems utilising americium-241 as a source of heat have been under development in Europe part European Space Agency funded programme since 2009. The aim is to develop all the building blocks that would enable launch and operate deep space planetary missions environments where use solar or alternative generation technologies challenging. Although some technical policy work activity predate ESA programme, maturity technology has now reached level it can be...
ABSTRACT The RemoveDEBRIS mission has been the first to successfully demonstrate, in-orbit, a series of technologies that can be used for active removal space debris. started late in 2014 and was sponsored by grant from EC saw consortium led Surrey Space Centre develop mission, concept in-orbit demonstrations, terminated March 2019. Technologies capture large debris, like net harpoon, have tested together with hardware software retrieve data on non-cooperative target debris kinematics...
Quasinormal modes (QNMs) are essential for understanding the stability and resonances of open systems, with increasing prominence in black hole physics. We present here first study QNMs optical potentials. show that solitons can support QNMs, deriving a soliton perturbation equation giving exact analytical expressions fiber solitons. discuss boundary conditions this intrinsically dispersive system identify novel signatures dispersion. From here, we discover new analogy holes describe regime...
On 27 December 2004, a giant γ flare from the Soft Gamma-Ray Repeater 1806-20 saturated many satellite gamma-ray detectors, being brightest transient event ever observed in Galaxy. AMANDA-II was used to search for down-going muons indicative of high-energy gammas and/or neutrinos this object. The data revealed no significant signal, so upper limits (at 90% C.L.) on normalization constant were set: 0.05(0.5) TeV−1 m−2 s−1 γ=−1.47 (−2) gamma flux and 0.4(6.1) neutrino flux.Received 11 July...
The laser-induced damage thresholds of commercial off-the-shelf visible and shortwave infrared cameras are measured under laboratory outdoor conditions for laser exposure times varying from microseconds to continuous wave. threshold results compared with a simple thermal model, which shows strong correlation the experimental data, allowing model be used predict camera across range durations wavelengths.
A manual visible spectrophotometric method for the determination of cephalosporins by alkaline degradation to sulphide and formation methylene blue has been adapted use with an air-segmented AutoAnalyzer I system. The system tested twelve cephalosporins; rectilinear calibration graphs were obtained good precision in general range 8–80 µg ml–1 cephalosporin.The automated procedure was as a determining trace amounts other sulphide-producing impurities penicillin G V samples. detection limit...
Radioisotope heater units (RHU) and radioisotope thermoelectric generators (RTG) are currently being developed for the ESA power system program. The state-of-the-art USA Russian systems is to use plutonium-238 as fuel; however, applications americium-241 has been selected due its availability relatively cost-effective production in European context. proposed designs implement a multi-layer containment approach safety reasons, with platinum-rhodium alloy inner of fuel carbon-based materials...
Radioisotope thermoelectric generators (RTG) and heater units (RHU) systems are being developed in Europe as part of a European Space Agency (ESA) funded program. Aimed at enabling or significantly enhancing space science exploration missions, these rely on the cost-effective production americium-241 for fuel. The use an iterative approach application lean methodologies development have been focus this technology Isotope containment architectures and, case RTG systems, bismuth telluride...
We have used near IR pump – Mid probe techniques to compare the feasibility and potential of using free standing nano-porous micro-porous silicon (ordered hole arrays) as optically controlled modulators operating in Mid-Wave Infrared (MWIR) covering range from 3.3-5 <i>μ</i>m. employed 800 nm pumping pulses with duration 60 fs reduce 4 <i>μ</i>m light transmission modulation about 25% 45% for both structures, respectively, at excitation powers 50mW (4 <i>mJ=cm<sup>2</sup></i>)....