| 1. |
- Pham, M. K., et al.
(författare)
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A new Certified Reference Material for radionuclides in Irish sea sediment (IAEA-385)
- 2008
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Ingår i: APPLIED RADIATION AND ISOTOPES. - : Elsevier BV. - 0969-8043 .- 1872-9800. ; 66:11, s. 1711-1717
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Konferensbidrag (refereegranskat)abstract
- A new Certified Reference Material (CRM) for radionuclides in sediment (IAEA-385) is described and the results of the certification process are presented. Eleven radionuclides (K-40, Cs-137, Ra-226, Ra-228, Th-230, Th-232, U-234, U-238, Pu-238, Pu239+240 and Am-241) have been certified and information mass activities with 95% confidence intervals are given for seven other radionuclides (Sr-90, Pb-210(Po-210), U-235, Pu-239, Pu-240 and Pu-241). Results for less frequently reported radionuclides (Co-60, Tc-99, Cs-134, Eu-155, Ra-224 and Np-239) and information on some activity and mass ratios are also reported. The CRM can be used for quality assurance/quality control of the analysis of radionuclides in sediment samples, for the development and validation of analytical methods and for training purposes. (C) 2008 IAEA. Published by Elsevier Ltd. All rights reserved.
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| 2. |
- de Blok, W.J.G., et al.
(författare)
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an overview of the MHONGOOSE survey: Observing nearby galaxies with MeerKAT
- 2016
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Ingår i: Proceedings of Science. - 1824-8039.
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Konferensbidrag (refereegranskat)abstract
- MHONGOOSE is a deep survey of the neutral hydrogen distribution in a representative sample of 30 nearby disk and dwarf galaxies with H I masses from ∼ 106 to ∼ 1011 M, and luminosities from MR ∼ 12 to MR ∼ −22. The sample is selected to uniformly cover the available range in log(MHI). Our extremely deep observations, down to H I column density limits of well below 1018 cm−2 — or a few hundred times fainter than the typical H I disks in galaxies — will directly detect the effects of cold accretion from the intergalactic medium and the links with the cosmic web. These observations will be the first ever to probe the very low-column density neutral gas in galaxies at these high resolutions. Combination with data at other wavelengths, most of it already available, will enable accurate modeling of the properties and evolution of the mass components in these galaxies and link these with the effects of environment, dark matter distribution, and other fundamental properties such as halo mass and angular momentum. MHONGOOSE can already start addressing some of the SKA-1 science goals and will provide a comprehensive inventory of the processes driving the transformation and evolution of galaxies in the nearby universe at high resolution and over 5 orders of magnitude in column density. It will be a Nearby Galaxies Legacy Survey that will be unsurpassed until the advent of the SKA, and can serve as a highly visible, lasting statement of MeerKAT’s capabilities.
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| 3. |
- Pham, M. K., et al.
(författare)
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Certified reference material for radionuclides in fish flesh sample IAEA-414 (mixed fish from the Irish Sea and North Sea)
- 2006
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Ingår i: Proceedings of the 15th International Conference on Radionuclide Metrology and its Applications (Applied Radiation and Isotopes). - Amsterdam : Elsevier BV. - 1872-9800 .- 0969-8043. ; 64:10-11, s. 1253-1259
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Konferensbidrag (refereegranskat)abstract
- A certified reference material (CRM) for radionuclides in fish sample IAEA-414 (mixed fish from the Irish Sea and North Seas) is described and the results of the certification process are presented. Nine radionuclides (K-40, Cs-137, Th-232, U-234, U-235, U-238, Pu-238, Pu239+240 and Am-241) were certified for this material. Information on massic activities with 95% confidence intervals is given for six other radionuclides (Sr-90, Pb-210(Po-210), Ra-226, Pu-239, Pu-240 Pu-241). Less frequently reported radionuclides (Tc-99, I-129, Th-228, Th-230 and Np-217) and information on some activity and mass ratios are also included. The CRM can be used for quality assurance/quality control of the analysis of radionuclides in fish sample, for the development and validation of analytical methods and for training purposes. The material is available from IAEA, Vienna, in 100 g units.
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| 6. |
- Powers, M. B., et al.
(författare)
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A Randomized Controlled Trial of Animated Versus Live Action Virtual Reality Therapy for Anxiety & Pain in a Level I Trauma Center
- 2018
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- While virtual reality exposure therapy (VRET) shows promise as a treatment for anxiety and pain (Powers & Emmelkamp, 2008), many users complain that computer-generated virtual reality (VR) stimuli appear unrealistic, eccentric, and too much like a video game (Kwon, Powell, & Chalmers, 2013). Historically, programmers using video game assets and computer-generated imagery (CGI) created VR content. While CGI can be used to make intricate virtual environments, unless there is a team of expert digital artists, the virtual stimulus may look unrealistic and exhibit a number of graphical glitches that could prove distracting in therapy. Furthermore, CGI often suffers from the uncanny valley effect, where CGI representations of people are perceived as unsettling as the representations become more lifelike. Thus, the only method to overcome the uncanny valley effect is to present the VR as less realistic (CGI) or photorealistic. In addition, current CGI VR packages are expensive and difficult to implement in widespread medical settings. Recently, however, an exciting alternative to traditional computer-generated VR has emerged: 360-Degree 3-D HD Video VR (Live Action). The benefit of Live Action VR as opposed to CGI VR is that it is photorealistic and doesn’t cause the uncanny valley effect of CGI. In addition, the projected cost of the end product is approximately $500 and delivered using a portable VR headset. In this RCT, participants in a Level I Trauma Center reporting pain (N = 78) were randomized to waitlist, 10-minutes of CGI VR, or 10-minutes of Live Action VR. Consistent with prediction, both VR conditions showed greater reduction in anxiety relative to waitlist (p < .05). However, there was no difference between the conditions. The two VR conditions also showed significantly greater reductions in pain (p < .001) and pain interference (p < .001) relative to the waitlist with no differences between conditions. As expected, participants rated Live Action VR significantly more realistic than CGI VR (p < .001) and reported a greater sense of being in the virtual world (p < .05). Finally, 92% of participants in the waitlist preferred to view the Live Action VR.
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