Browsing School of Physics by Title
Now showing items 71-90 of 175
-
Kinematics of the Broad Line Region in M81
(2007)A new model is presented which explains the origin of the broad emission lines observed in the LINER/Seyfert nucleus of M81 in terms of a steady state spherically symmetric inflow, amounting to 1 x 10^-5 Msun/yr, which is ... -
Label free ultra-sensitive imaging with sub-diffraction spatial resolution
(IEEE, 2019-07-09)In this paper, we show a new way to break the resolution limit and dramatically improve sensitivity to structural changes. To realize it we developed a novel label free contrast mechanism, based on the spectral encoding ... -
Label-free ultra-sensitive visualization of structure below the diffraction resolution limit
(Wiley, 2018-03-23)For both fundamental study of biological processes and early diagnosis of diseases, information about nanoscale changes in tissue and cell structure is crucial. Nowadays, almost all currently known nanoscopy methods rely ... -
Leaching of decabromodiphenyl ether and hexabromocyclododecane from fabrics under simulated landfill conditions
(KeAi Communications Co. Ltd, 2019-12-30)A series of laboratory experiments were conducted to examine the leaching of decabromodiphenyl ether (BDE-209) and hexabromocyclododecane (HBCDD) from a mix of three fabrics. Consistent with previous reports that such ... -
Microcirculation imaging based on full-range high-speed spectral domain correlation mapping optical coherence tomography
(SPIE (International Society for Optics and Photonics, 2014)Microcirculation imaging is a key parameter for studying the pathophysiological processes of various disease conditions, in both clinical and fundamental research. A full-range spectral-domain correlation mapping optical ... -
Microscopic particle discrimination using spatially-resolved Fourier-holographic light scattering angular spectroscopy
(Optica, 2006-11-13)We utilize Fourier-holographic light scattering angular spectroscopy to record the spatially resolved complex angular scattering spectra of samples over wide fields of view in a single or few image captures. Without resolving ... -
Modelling exposure to pharmaceutical agents
(Institute of Physics, 2009)Aerosol exposure to the active ingredients of pharmaceuticals arises in research, development and manufacturing. In most instances it is only possible to make small numbers of measurements of exposure and given the inter- ... -
Monte Carlo commissioning of clinical electron beams using large field measurements
(Institute Of Physics (IOP Publishing), 2010-07-21)Monte Carlo simulation can accurately calculate electron fluence at the patient surface and the resultant dose deposition if the initial source electron beam and linear accelerator treatment head geometry parameters are ... -
The most powerful flaring activity from the NLSyl PMN J0948+0022
(Oxford University Press, 2015-01-21)We report on multifrequency observations performed during 2012 December-2013 August of the first narrow-line Seyfert 1 galaxy detected in gamma-rays, PMN J0948+0022 (z = 0.5846). A y -ray flare was observed by the Large ... -
Multiwavelength Observations of 1ES 1959+650, One Year After the Strong Outburst of 2002
(2006)In April-May 2003, the blazar 1ES 1959+650 showed an increased level of X-ray activity. This prompted a multiwavelength observation campaign with the Whipple 10 m gamma-ray telescope, the Rossi X-ray Timing Explorer, the ... -
Multiwavelength observations of a TeV-Flare from W Comae
(2009)We report results from an intensive multiwavelength campaign on the intermediate-frequency-peaked BL Lacertae object W Com (z=0.102) during a strong outburst of very high energy gamma-ray emission in June 2008. The very ... -
Multiwavelength Observations of LS I +61 303 with VERITAS, Swift and RXTE
(2009)We present results from a long-term monitoring campaign on the TeV binary LSI +61 303 with VERITAS at energies above 500 GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5 day orbital cycles ... -
Multiwavelength Observations of Markarian 421 in 2005 - 2006
(2009)Since September 2005, the Whipple 10m Gamma-ray Telescope has been operated primarily as a blazar monitor. The five Northern Hemisphere blazars that have already been detected at the Whipple Observatory, Markarian 421, ... -
Multiwavelength Observations of Markarian 421 in March 2001: an Unprecedented View on the X-ray/TeV Correlated Variability
(2007)(Abridged) We present a detailed analysis of week-long simultaneous observations of the blazar Mrk421 at 2-60 keV X-rays (RXTE) and TeV gamma-rays (Whipple and HEGRA) in 2001. The unprecedented quality of this dataset ... -
Multiwavelength observations of Mrk 501 in 2008
(EDP Sciences, 2015-12-17)Context. Blazars are variable sources on various timescales over a broad energy range spanning from radio to very high energy (>100 GeV, hereafter VHE). Mrk 501 is one of the brightest blazars at TeV energies and has been ... -
Multiwavelength Observations of the Previously Unidentified Blazar RX J0648.7+1516
(2011)We report on the VERITAS discovery of very-high-energy (VHE) gamma- ray emission above 200 GeV from the high-frequency-peaked BL Lac object RXJ0648.7+1516 (GBJ0648+1516), associated with 1FGLJ0648.8+1516. The photon spectrum ... -
Multiwavelength Observations of the VHE Blazar 1ES 2344+514
(2011)Multiwavelength observations of the high-frequency-peaked blazar 1ES2344+514 were performed from 2007 October to 2008 January. The campaign represents the first contemporaneous data on the object at very high energy (VHE, ... -
Multiwavelength study of quiescent states of MRK 421 with unprecedented hard x-ray coverage provided by NuSTAR in 2013
(IOP Publishing, 2016)We present coordinated multiwavelength observations of the bright, nearby BL Lacertae object Mrk 421 taken in 2013 January-March, involving GASP-WEBT, Swift, NuSTAR, Fermi-LAT, MAGIC, VERITAS, and other collaborations and ... -
Nano-sensitive optical coherence tomography
(Royal Society of Chemistry, 2014)Depth resolved label-free detection of structural changes with nanoscale sensitivity is an outstanding problem in the biological and physical sciences and has significant applications in both the fundamental research and ... -
Nanoscale structure detection and monitoring of tumour growth with optical coherence tomography
(Royal Society of Chemistry, 2020-05-25)Approximately 90% of cancers originate in epithelial tissues leading to epithelial thickening, but the ultrastructural changes and underlying architecture are less well known. Depth resolved label free visualization of ...