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Now showing items 16168-16187 of 23970
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A Participatory Study into the Student Experience of First Year Under-Represented Students in a UK University
(2019-08-14)This thesis explores the experience of ten undergraduate students at Southeastern (a UK post-1992 university) as they transition into higher education (HE) during their first year. The research focuses on the widening ... -
Particle acceleration and dynamics of double-double radio galaxies : Theory versus observations
(2013-12-01)In this paper, we showthat a small sample of radio galaxies with evidence for multiple epochs of jet activity (so-called double-double radio galaxies) have the same electron injection spectral index in the two activity ... -
Particle acceleration and jet dynamics in Centaurus A
(2004-06)New multi-epoch Chandra observations, combined with multi-epoch, high-dynamic range VLA data, have allowed us to relate the radio and X-ray structure of the jet in Cen A to the jet dynamics. We present evidence that a ... -
Particle Acceleration and Their Escape into the Heliosphere in Solar Flares with Open Magnetic Field
(2023-07-20)Energetic particle populations in the solar corona and in the heliosphere appear to have different characteristics even when produced in the same solar flare. It is not clear what causes this difference: properties of the ... -
Particle Asymmetry Analyser
(1992-09-30) -
Particle backscatter, extinction, and lidar ratio profiling with Raman lidar in south and north China
(2007-09-01)Aerosol Raman lidar observations of profiles of the particle extinction and backscatter coefficients and the respective extinction-to-backscatter ratio (lidar ratio) were performed under highly polluted conditions in the ... -
Particle concentration measurements in a busy street canyon: initial observations from Swansea, Wales
(Inst of Environment & Health, Cranfield University, 2009) -
The particle content of low-power radio galaxies in groups and clusters
(2014-03-01)The synchrotron-radiating particles and magnetic fields in low-power radio galaxies (including most nearby cluster-centre sources), if at equipartition, can provide only a small fraction of the total internal energy density ... -
Particle content, radio-galaxy morphology and jet power : all radio-loud AGN are not equal
(2018-05-11)Ongoing and future radio surveys aim to trace the evolution of black hole growth and feedback from active galactic nuclei (AGNs) throughout cosmic time; however, there remain major uncertainties in translating radio ... -
Particle extinction measured at ambient conditions with differential optical absorption spectroscopy. 1 : System setup and characterization
(2005-03-20)We describe an instrument for measuring the particle extinction coefficient at ambient conditions in the spectral range from 270 to 1000 nm. It is based on a differential optical absorption spectroscopy (DOAS) system, which ... -
Particle extinction measured at ambient conditions with differential optical absorption spectroscopy. 2 : Closure study
(2006-04-01)Spectral particle extinction coefficients of atmospheric aerosols were measured with, to the best of our knowledge, a newly designed differential optical absorption spectroscopy (DOAS) instrument. A closure study was carried ... -
Particle habit imaging using incoherent light : a first step toward a novel instrument for cloud microphysics
(2011-04)The imaging unit of the novel cloud particle instrument Particle Habit Imaging and Polar Scattering (PHIPS) probe has been developed to image individual ice particles produced inside a large cloud chamber. The PHIPS produces ... -
Particle Image Velocimetry Measurement and Computational Fluid Dynamic Simulations of the Unsteady Flow within a Rotating Disk Cavity
(2014-05-16)In this article a combined experimental and numerical investigation of the unsteady mixing flow of the ingestion gas and rim sealing air inside a rotating disk cavity was carried out. A new test rig was set up, and the ... -
Particle image velocimetry measurement of in-cylinder flow in internal combustion engines : Experiment and flow structure analysis
(2002)A cross-correlation digital particle image velocimetry (PIV) system has been developed and applied to study the in-cylinder flow in a single-cylinder engine with a production-type cylinder head. The PIV system set-up and ... -
Particle Swarm Optimization Trained Artificial Neural Network to Control Shunt Active Power Filter Based on Multilevel Flying Capacitor Inverter
(2020-06-30)Shunt Active Power Filters (SAPF) are an emerging power electronics-based technology to mitigate harmonic and improve power quality in distribution grids. The SAPF proposed in this paper is based on three-phase Flying ... -
Particulate matter air pollution components and incidence of cancers of the stomach and the upper aerodigestive tract in the European Study of Cohorts of Air Pollution Effects (ESCAPE)
(2018-11-01)Introduction: Previous analysis from the large European multicentre ESCAPE study showed an association of ambient particulate matter <2.5 μm (PM2.5) air pollution exposure at residence with the incidence of gastric cancer. ... -
Partitional Clustering of Malware Using K-Means
(Springer Nature, 2014-05)This paper describes a novel method aiming to cluster datasets containing malware behavioural data. Our method transform the data into an standardised data matrix that can be used in any clustering algorithm, finds the ...