A5112480804- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Planetary Science and Exploration
- Astronomy and Astrophysical Research
- Space Exploration and Technology
- Astrophysics and Star Formation Studies
- Isotope Analysis in Ecology
- Astronomical Observations and Instrumentation
- Animal Disease Management and Epidemiology
- History and Developments in Astronomy
- Viral gastroenteritis research and epidemiology
- Animal Virus Infections Studies
- Viral Infections and Immunology Research
- Spacecraft and Cryogenic Technologies
- Gamma-ray bursts and supernovae
- Animal Nutrition and Physiology
- Psychopathy, Forensic Psychiatry, Sexual Offending
- Adaptive optics and wavefront sensing
- Solar and Space Plasma Dynamics
- Medical Image Segmentation Techniques
- Malaria Research and Control
- Trypanosoma species research and implications
- Geophysics and Gravity Measurements
- Nuclear Physics and Applications
- Crime Patterns and Interventions
Norfolk and Norwich University Hospital
2025
University of Lincoln
2024
Purdue University West Lafayette
2019-2022
University of East Anglia
2022
University of Manchester
2012-2021
Jet Propulsion Laboratory
2010-2017
Space Information Laboratories (United States)
2014-2015
California Institute of Technology
2012-2014
The University of Melbourne
2001-2011
Walter and Eliza Hall Institute of Medical Research
2005-2011
NASA's Wide-field Infrared Survey Explorer (WISE) spacecraft has been brought out of hibernation and resumed surveying the sky at 3.4 4.6 um. The scientific objectives NEOWISE reactivation mission are to detect, track, characterize near-Earth asteroids comets. search for minor planets on December 23, 2013, first new object (NEO) was discovered six days later. As an infrared survey, detects based their thermal emission is equally sensitive high low albedo objects; consequently,...
The Wide-field Infrared Survey Explorer (WISE) observed 52 Centaurs and Scattered Disk Objects in the thermal infrared, including 15 discoveries that were new. We present analyses of these observations to estimate sizes mean optical albedos. find albedos 0.08 +/- 0.04 for entire data set. Thermal fits yield average beaming parameters 0.9 0.2 are similar both SDO Centaur sub-classes. Biased cumulative size distributions size-frequency distribution power law indices ~ -1.7 0.3. also reveal a...
We present revised near-infrared albedo fits of 2835 main-belt asteroids observed by WISE/NEOWISE over the course its fully cryogenic survey in 2010. These are derived from reflected-light images taken simultaneously with thermal emission measurements, allowing for more accurate measurements albedos than is possible visible measurements. Because our sample requires reflected light it undersamples small, low-albedo asteroids, as well those blue spectral slopes across wavelengths investigated....
Using albedos from WISE/NEOWISE to separate distinct albedo groups within the Main Belt asteroids, we apply Hierarchical Clustering Method these subpopulations and identify dynamically associated clusters of asteroids. While this survey is limited ∼35% known asteroids that were detected by NEOWISE, present families linked objects as higher confidence associations than can be obtained dynamical linking alone. We find over one-third observed population represented in high-confidence cores...
We present preliminary diameters and albedos for 7,959 asteroids detected in the first year of NEOWISE Reactivation mission. 201 are near-Earth (NEAs). 7,758 Main Belt or Mars-crossing asteroids. 17% these objects have not been previously characterized using WISE thermal measurements. Diameters determined to an accuracy ~20% better. If good-quality H magnitudes available, can be within ~40%
The 163 comets observed during the WISE/NEOWISE prime mission represent largest infrared survey to date of comets, providing constraints on dust, nucleus size, and CO + CO2 production. We present detailed analyses comet discoveries, discuss observations active showing 4.6 μm band excess. find a possible relation between dust production, as well differences in sizes long short period nuclei.
Abstract We use NEOWISE data from the four-band and three-band cryogenic phases of Wide-field Infrared Survey Explorer mission to constrain size distributions comet populations debias measurements short- long-period (LPC) populations. find that fit debiased LPC population yields a cumulative size−frequency distribution (SFD) power-law slope ( β ) −1.0 ± 0.1, while Jupiter-family (JFC) SFD has steeper with = −2.3 0.2. The JFCs in our sample yielded mean nucleus 1.3 km diameter, LPCs’ is...
Only a very small fraction of the asteroid population at size scales comparable to object that exploded over Chelyabinsk, Russia has been discovered date, and physical properties are poorly characterized. We present previously unreported detections 106 close approaching near-Earth objects (NEOs) by Wide-field Infrared Survey Explorer mission's NEOWISE project. These infrared observations constrain such as diameter albedo for these objects, many which found be smaller than 100 m. Because...
In this paper, we contribute to both the growing body of literature on social movement networks and change in by exploring patterns mechanisms within network ‘inner circle’ Provisional Irish Republican Army. Specifically, focus upon period between 1969 (when it formed) 1988 (the last point for which have been able gather good data). Our primary aims are substantive. We want know how changed over time. addition, however, our analysis identifies changes other analysts might look their offers...
In this work we characterize the recently discovered active main belt object P/2012 F5 (Gibbs), which was with a dust trail > 7' in length outer belt, 7 months prior to aphelion. We use optical imaging obtained on UT 2012 March 27 analyze central condensation and long trail. find nuclear B-band R-band apparent magnitudes of 20.96 19.93 mag, respectively, give an upper limit radius nucleus 2.1 km. The geometric cross-section material ~ 4 x 10^8 m^2, corresponding mass 5 10^7 kg. Analysis...
Comet C/2013 A1 (Siding Spring) will have a close encounter with Mars on October 19, 2014. We model the dynamical evolution of dust grains from time their ejection comet nucleus to encounter, and determine flux at Mars. Constraints velocity Hubble Space Telescope observations indicate that bulk likely miss Mars, although it is possible few-percent higher velocities reach peaking approximately 90--100 minutes after approach nucleus, consisting mostly millimeter-radius ejected heliocentric...
Background Barriers to communication significantly reduce access health services for people with deafness or hearing loss (PDHL). These barriers contribute reduced healthcare-seeking behaviour, poorer information, and adverse outcomes. In response, a multidisciplinary working group of patients, clinicians, researchers, charity representatives was established investigate accessibility, communication, deaf awareness within the United Kingdom’s (UK) National Health Service (NHS). Methodology A...
On 2010 January 18–19 and June 28–29, the Wide-field Infrared Survey Explorer (WISE) spacecraft imaged Rosetta mission target, comet 67P/Churyumov-Gerasimenko. We present a preliminary analysis of images, which provide characterization dust environment at heliocentric distances similar to those planned for initial encounter, but on outbound leg its orbit rather than inbound. Broadband photometry yields low levels CO2 production distance 3.32 AU no detectable 4.18 AU. find that these...
Early findings from a national study of discharges 32 National Health Service medium secure units revealed that nearly twice as many patients than expected were discharged back to prison.To compare the characteristics those prison with community, and consider implications for ongoing care risk.Prospective cohort follow-up design. All forensic across England Wales over 12-month period identified. Those compared who community.Nearly half individuals diagnosed serious mental illness third...
We present results from a wide-field imaging campaign at the Canada-France-Hawaii Telescope to study spectacular outburst of comet 17P/Holmes in late 2007. Using image-processing techniques we probe inside spherical dust coma and find sixteen fragments having both spatial distribution kinematics consistent with isotropic ejection nucleus. Photometry is inconsistent scattering monolithic, inert bodies. Instead, each detected fragment appears be an active cometesimal producing its own coma. By...
The Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) mission observed comet C/2013 A1 (Siding Spring) three times at 3.4 {\mu}m and 4.6 as the approached Mars in 2014. is an extremely interesting target since its close approach to late 2014 will be by various spacecraft in-situ. observations were taken Jan., Jul. Sep. when was heliocentric distances of 3.82 AU, 1.88 1.48 AU. level activity increased significantly between Jan. visits but then decreased time Sep., approximately...
Equine rhinitis A virus (ERAV) is a respiratory pathogen of horses and classified as an Aphthovirus, the only non-Foot-and-mouth disease (FMDV) member this genus. In FMDV, virion protein 1 (VP1) major target protective antibodies responsible for viral attachment to permissive cells via RGD motif located in distal surface loop. Although both viruses share considerable sequence identity, ERAV VP1 does not contain motif. To investigate antibody receptor-binding properties VP1, we have expressed...
Equine rhinitis A virus (ERAV) is a member of the genus Aphthovirus, family Picornaviridae, and causes respiratory disease in horses worldwide. To characterize putative receptor molecule(s) ERAV isolate 393/76 (ERAV.393/76) on surface Vero other cells, an assay was developed to measure binding purified biotinylated ERAV.393/76 virions cells by flow cytometry. Using this assay, level different cell types correlated with relative infectivity each type. In particular, equine fetal kidney mouse...
Abstract Apical membrane antigen 1 (AMA1) is essential for malaria parasite invasion of erythrocytes and therefore an attractive target drug development. Peptides that bind AMA1 have been identified from random peptide libraries expressed on the surface phage. Of these, R1, which binds to a hydrophobic ligand binding site AMA1, was particularly potent inhibitor in vitro. The solution structure R1 contains turn‐like conformation between residues 5–10. Here importance this examined by...
ABSTRACT The nucleotide and deduced amino acid sequences of the P1 region genomes 10 independent equine rhinitis A virus (ERAV) isolates were determined found to be very closely related. panel seven monoclonal antibodies prototype ERAV.393/76 that bound nonneutralization epitopes conserved among all was raised. In serum neutralization assays, rabbit polyclonal sera from naturally experimentally infected horses reacted in a consistent discriminating manner with isolates, which indicated...