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762 results on '"Lee, R. J."'

2. Preloading with drugs before entry to the nighttime entertainment district: presentation, intoxication rates, and effects of police presence during assessment

Author

Lee R. J. Hughes, Corey Allen, and Grant J. Devilly

Subjects
Illicit drugs, Alcohol use, Preloading, Police presence, Field research, Nighttime entertainment districts, Public aspects of medicine, RA1-1270
Abstract

Abstract Background Past research has either focused on alcohol or drug preloading before a night out, but not on the interaction between them. With increased risks of harm through interaction effects, we wished to build upon previous research in this area. We sought to determine who drug preloads, why do people engage in this practice, what drug/s are people using, and how inebriated they are as they enter the NED. Additionally, we examined what impact varying levels of police presence has on the collections of sensitive data in this context. Methods We captured estimates of drug and alcohol preloading from 4723 people entering nighttime entertainment districts (NEDs) in Queensland, Australia. Data collection occurred under three varying conditions of police presence (i.e., no police present, police present but not engaging with participants, and police engaging with participants). Results People who admitted to preloading drugs were found to be younger in age than non-drug admitters, more likely to be male than female, use one type of drug (mostly stimulants) rather than multiple (if we exclude alcohol), significantly more intoxicated upon arrival, and more subjectively affected from their use of alcohol and drugs as Breath Approximated Alcohol Concertation levels increased. People were more likely to admit having used drugs in the absence of police, but this had only a small effect. Conclusions People who drug preload are a vulnerable subset of the youth population that is susceptible to experiencing harms in this context. As they drink more alcohol, they experience higher affects than those who do not report to also take drugs. Police engagement through service rather than force may mitigate some risks. Further enquiry is needed to better understand those who engage in this practice and to have quick, cheap, objective tests of what drugs these people are using.

Published
2023
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3. Design and construction of a high-energy photon polarimeter

Author

Dugger, M., Ritchie, B. G., Sparks, N., Moriya, K., Tucker, R. J., Lee, R. J., Thorpe, B. N., Hodges, T., Barbosa, F. J., Sandoval, N., and Jones, R. T.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

We report on the design and construction of a high-energy photon polarimeter for measuring the degree of polarization of a linearly-polarized photon beam. The photon polarimeter uses the process of pair production on an atomic electron (triplet production). The azimuthal distribution of scattered atomic electrons following triplet production yields information regarding the degree of linear polarization of the incident photon beam. The polarimeter, operated in conjunction with a pair spectrometer, uses a silicon strip detector to measure the recoil electron distribution resulting from triplet photoproduction in a beryllium target foil. The analyzing power $\Sigma_A$ for the device using a 75 $\rm{\mu m}$ beryllium converter foil is about 0.2, with a relative systematic uncertainty in $\Sigma_A$ of 1.5%., Comment: 13 pages, 17 figures

Published
2017
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7. Pair production and electron capture in relativistic heavy-ion collisions

Author

Lee, R. J. S., Mullan, J. V., McCann, J. F., and Crothers, D. S. F.

Subjects
Physics - Atomic Physics, Physics - Accelerator Physics
Abstract

Results are presented for simulations of electron-positron pair production in relativistic heavy-ion collisions leading to electron capture and positron ejection. We apply a two-center relativistic continuum distorted-wave model to represent the electron/positron dynamics during the collision process. The results are compared with experimental cross-section data for ${\rm La}^{57+}$ and ${\rm Au}^{79+}$ impact on Gold, Silver and Copper targets. The theory is in very good agreement with experiment, verifying the result that the process increases in importance with both collision energy and target atomic number, and improves upon previous simulations of this process., Comment: 4 pages 2 figures. Submitted to Phys Rev A

Published
2000
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11. Pre-Loading with Drugs before Entering the Nighttime Entertainment District: A Scoping Review

Author

Lee R. J. Hughes and Grant J. Devilly

Subjects
Psychiatry and Mental health, Health (social science), Public Health, Environmental and Occupational Health, Medicine (miscellaneous)
Abstract

Background: Nighttime entertainment districts attract many people who pre-load with alcohol and other substances before entering licensed venues. Despite the harms and dangers associated with both alcohol pre-loading and drug use respectively, there is a paucity of research on drug and polysubstance pre-loading. Objectives: The primary objectives of this scoping review are to systematically map out the body of existing literature on drug and polysubstance pre-loading, discuss methodological potentials and pitfalls in field-based research, identify gaps in knowledge, and derive practical implications and opportunities for future research. Methods: Using the PRISMA (ScR) guidelines, we conducted a search of Medline, PsycINFO, Embase, Scopus, CINAHL, Social Services Abstracts, Sociological Abstracts, and Web of Science databases. We followed this up by conducting an author and citation analysis of relevant articles. Results: Of the 632 data sources identified, 338 articles were reviewed after removing duplicates. Overall, only nine articles were included and thematically analyzed. In our review and analysis of the literature, we find people who drug pre-load to be a particularly vulnerable subset of the population. We also posit that the point-of-entry design has greater sensitivity than the commonly used portal-in design. From this, we also draw attention to various time points where field-based researchers can provide intervention. Conclusions: Given the high prevalence of young adults engaging in the behavior, clinicians should consider pre-loading behaviors when assessing for risk and vulnerability. Field-based research would elucidate the full breadth and scope of the growing pre-loading phenomenon and the dangers associated with this practice.

Published
2023
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30. P6296The role of extracellular matrix protein 1 (ECM1) - a novel link between inflammation and cardiac fibrosis

Author

Hardy, S, primary, Mabotuwana, N S, additional, Murtha, L A, additional, Coulter, B, additional, Bezenilla, S S, additional, Al-Omary, M S, additional, Senanayake, T, additional, Loering, S, additional, Rech, C L S, additional, Starkey, M, additional, Lee, R J, additional, Rainer, P, additional, Hansbro, P M, additional, and Boyle, A J, additional

Published
2019
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47. Autonomous Vegetation Cover Scene Classification of EO-1 Hyperion Hyperspectral Data

Author

Lee, R. J and Davies, A. G

Subjects
Instrumentation And Photography
Abstract

The Autonomous Sciencecraft Experiment (ASE) is a JPL-led, New Millennium Program mission containing new technology in the form of software to be flown on the Earth Observer-1 (EO-1) satellite in early 2004. This new technology will facilitate an artificially intelligent machine with autonomous science-driven capabilities. Among the ASE flight software is a set of onboard science algorithms designed for autonomous data processing, primarily based on change detection from observation to observation. Using the output from these algorithms, ASE has the ability to autonomously modify the EO-1 observation plan, retargeting itself for a more in-depth observation of a scientific event in progress. Furthermore, intelligent and selective information down-linking will maximize return of the most valuable scientific data. Among the algorithms developed for use on ASE is a Lava-Vegetation (L-V) detection algorithm. This algorithm can effectively identify the initial location and extent of lava and vegetation coverage based on spectral shape. Comparison of several different observations, all classified via this algorithm, can make change detection possible.

Published
2004

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