Institution
Defence Science and Technology Laboratory
Government•Salisbury, United Kingdom•
About: Defence Science and Technology Laboratory is a government organization based out in Salisbury, United Kingdom. It is known for research contribution in the topics: Burkholderia pseudomallei & Francisella tularensis. The organization has 926 authors who have published 1242 publications receiving 30091 citations. The organization is also known as: Dstl & [dstl].
Papers published on a yearly basis
Papers
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TL;DR: SARS-CoV-2 was found to be stable, in the dark, in a dynamic small particle aerosol under the four experimental conditions the authors tested and viable virus could still be detected after 90 minutes and the decay rate and half-life was determined.
Abstract: SARS-CoV-2, the causative agent of the COVID-19 pandemic, may be transmitted via airborne droplets or contact with surfaces onto which droplets have deposited. In this study, the ability of SARS-CoV-2 to survive in the dark, at two different relative humidity values and within artificial saliva, a clinically relevant matrix, was investigated. SARS-CoV-2 was found to be stable, in the dark, in a dynamic small particle aerosol under the four experimental conditions we tested and viable virus could still be detected after 90 minutes. The decay rate and half-life was determined and decay rates ranged from 0.4 to 2.27 % per minute and the half lives ranged from 30 to 177 minutes for the different conditions. This information can be used for advice and modelling and potential mitigation strategies.
153 citations
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TL;DR: In this paper, a new material model for the dynamic fracture analysis of anisotropic materials has been proposed within the framework of the bond-based peridynamic theory, which enables predicting complex fracture phenomena such as spontaneous crack nucleation and crack branching, curving and arrest.
151 citations
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TL;DR: This review highlights the considerations that are needed in the journey to develop a human vaccine, including animal models, and includes an assessment of the current status of novel vaccine candidates.
Abstract: There is currently no licensed vaccine for brucellosis in humans. Available animal vaccines may cause disease and are considered unsuitable for use in humans. However, the causative pathogen, Brucella, is among the most common causes of laboratory-acquired infections and is a Center for Disease Control category B select agent. Thus, human vaccines for brucellosis are required. This review highlights the considerations that are needed in the journey to develop a human vaccine, including animal models, and includes an assessment of the current status of novel vaccine candidates.
151 citations
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École Normale Supérieure1, Brookhaven National Laboratory2, Pennsylvania State University3, University of Washington4, Ames Research Center5, Dalhousie University6, University of Oslo7, Norwegian Institute for Air Research8, Princeton University9, Met Office10, Defence Science and Technology Laboratory11, Langley Research Center12, Goddard Space Flight Center13, Colorado State University14, Goddard Institute for Space Studies15, University of Maryland, College Park16, University of Illinois at Urbana–Champaign17
TL;DR: In this article, the authors report results of a project involving 12 groups using 15 models to examine radiative forcing by sulfate aerosol for a wide range of values of particle radius, aerosol optical depth, surface albedo, and solar zenith angle.
Abstract: The importance of aerosols as agents of climate change has recently been highlighted. However, the magnitude of aerosol forcing by scattering of shortwave radiation (direct forcing) is still very uncertain even for the relatively well characterized sulfate aerosol. A potential source of uncertainty is in the model representation of aerosol optical properties and aerosol influences on radiative transfer in the atmosphere. Although radiative transfer methods and codes have been compared in the past, these comparisons have not focused on aerosol forcing (change in net radiative flux at the top of the atmosphere). Here we report results of a project involving 12 groups using 15 models to examine radiative forcing by sulfate aerosol for a wide range of values of particle radius, aerosol optical depth, surface albedo, and solar zenith angle. Among the models that were employed were high and low spectral resolution models incorporating a variety of radiative transfer approximations as well as a line-by-line model. The normalized forcings (forcing per sulfate column burden) obtained with the several radiative transfer models were examined, and the discrepancies were characterized. All models simulate forcings of comparable amplitude and exhibit a similar dependence on input parameters. As expected for a non-light-absorbing aerosol, forcings were negative (cooling influence) except at high surface albedo combined with small solar zenith angle. The relative standard deviation of the zenith-angle-averaged normalized broadband forcing for 15 models-was 8% for particle radius near the maximum in this forcing (approx. 0.2 microns) and at low surface albedo. Somewhat greater model-to-model discrepancies were exhibited at specific solar zenith angles. Still greater discrepancies were exhibited at small particle radii and much greater discrepancies were exhibited at high surface albedos, at which the forcing changes sign; in these situations, however, the normalized forcing is quite small quite small. Discrepancies among the models arise from inaccuracies in Mie calculations, differing treatment of the angular scattering phase function, differing wavelength and angular resolution, and differing treatment of multiple scattering. These results imply the need for standardized radiative transfer methods tailored to the direct aerosol forcing problem. However, the relatively small spread in these results suggests that the uncertainty in forcing arising from the treatment of radiative forcing of a well-characterized aerosol at well-specified surface albedo is smaller than some of the other sources of uncertainty in estimates of direct forcing by anthropogenic sulfate aerosols and anthropogenic aerosols generally.
151 citations
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TL;DR: This review describes the numerous experimental methods explored to date to produce composites with structures and mechanical properties similar to those of natural nacre and is divided into those producing bulk materials, coatings and free-standing films.
Abstract: The performance of man-made materials can be improved by exploring new structures inspired by the architecture of biological materials. Natural materials, such as nacre (mother-of-pearl), can have outstanding mechanical properties due to their complicated architecture and hierarchical structure at the nano-, micro- and meso-levels which have evolved over millions of years. This review describes the numerous experimental methods explored to date to produce composites with structures and mechanical properties similar to those of natural nacre. The materials produced have sizes ranging from nanometres to centimetres, processing times varying from a few minutes to several months and a different range of mechanical properties that render them suitable for various applications. For the first time, these techniques have been divided into those producing bulk materials, coatings and free-standing films. This is due to the fact that the material's application strongly depends on its dimensions and different results have been reported by applying the same technique to produce materials with different sizes. The limitations and capabilities of these methodologies have been also described.
151 citations
Authors
Showing all 928 results
Name | H-index | Papers | Citations |
---|---|---|---|
Richard W. Titball | 79 | 410 | 22484 |
Andrew D. Griffiths | 72 | 152 | 37590 |
Alan D.T. Barrett | 71 | 341 | 17136 |
Jim Haywood | 67 | 213 | 20503 |
Philip N. Bartlett | 58 | 293 | 12798 |
Alan C. Newell | 58 | 209 | 17820 |
David A. Rand | 57 | 223 | 12157 |
Michael P. O'Donnell | 49 | 301 | 8762 |
James Hill | 47 | 216 | 6837 |
Franz Worek | 46 | 262 | 8754 |
Petra C. F. Oyston | 45 | 127 | 7155 |
K. Ravi Acharya | 45 | 161 | 7405 |
Horst Thiermann | 43 | 298 | 7091 |
Leigh T. Canham | 42 | 160 | 18268 |
Mark J. Midwinter | 39 | 180 | 5330 |