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- Monks, P. S., et al.
(författare)
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Atmospheric composition change : global and regional air quality
- 2009
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Ingår i: Atmospheric Environment. - : Elsevier BV. - 1352-2310 .- 1873-2844. ; 43:33, s. 5268-5350
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Forskningsöversikt (refereegranskat)abstract
- Air quality transcends all scales with in the atmosphere from the local to the global with handovers and feedbacks at each scale interaction. Air quality has manifold effects on health, ecosystems heritage and, climate. In this review the state of scientific understanding in relation to global and regional air quality is outlined. The review discusses air quality, in terms of emissions, processing and transport of trace gases and aerosols. New insights into the characterization of both natural and anthropogenic emissions are reviewed looking at both natural (e.g. dust and lightning) as well as plant emissions. Trends in anthropogenic emissions both by region and globally are discussed as well as biomass burning emissions. In terms of chemical processing the major air quality elements of ozone, non-methane hydrocarbons, nitrogen oxides and aerosols are covered. A number of topics are presented as a way of integrating the process view into the atmospheric context; these include the atmospheric oxidation efficiency, halogen and HOx chemistry, nighttime chemistry, tropical chemistry, heat waves, megacities, biomass burning and the regional hot spot of the Mediterranean. New findings with respect to the transport of pollutants across the scales are discussed, in particular the move to quantify the impact of long-range transport on regional air quality. Gaps and research questions that remain intractable are identified. The review concludes with a focus of research and policy questions for the coming decade. In particular, the policy challenges for concerted air quality and climate change policy (co-benefit) are discussed.
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| 2. |
- Roila, F., et al.
(författare)
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Prevention of chemotherapy- and radiotherapy-induced emesis : Results of the 2004 Perugia International Antiemetic Consensus Conference
- 2006
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Ingår i: Annals of Oncology. - : Elsevier BV. - 0923-7534 .- 1569-8041. ; 17:1, s. 20-28
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Forskningsöversikt (refereegranskat)abstract
- Background: In the late 1990s, several professional organizations convened antiemetic guideline groups and published the findings of these expert panels. Each of these documents was based on analyses of the available published trials and provided nearly similar recommendations. Nonetheless, small differences in emetic risk categories and treatment recommendations led to confusion in antiemetics selection. With the emergence of new findings and agents since the guidelines were initially published, many of the oncology professional societies have updated the antiemetic guidelines. Materials and methods: A literature review up to March 2004 was carried out using MEDLINE with evaluation of the evidence by an expert panel composed of 23 oncology professionals in clinical medicine, medical oncology, radiation oncology, oncology nursing, statistics, pharmacy, medical policy and decision making, and pharmacology. The experts represented nine oncology professional societies and came from 11 different countries on four continents. Results: Recommendations on antiemetic regimens to prevent emesis induced by high, moderate, low and minimal risk chemotherapy were suggested as well as management of anticipatory emesis. Furthermore, recommendations for refractory emesis, emesis induced by high-dose chemotherapy and radiotherapy and for antiemetics in children receiving chemotherapy were elaborated. Conclusions: Recommendations about antiemetic prophylaxis in patients receiving treatment with chemo- and radiotherapy have been updated by representatives of nine oncological organizations. © 2005 European Society for Medical Oncology.
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| 7. |
- Balmer, R. S., et al.
(författare)
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Unlocking diamond's potential as an electronic material
- 2008
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Ingår i: Philosophical Transactions. Series A. - London : Royal Society of London. - 1364-503X .- 1471-2962. ; 366:1863, s. 251-265
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we review the suitability of diamond as a semiconductor material for high-performance electronic applications. The current status of the manufacture of synthetic diamond is reviewed and assessed. In particular, we consider the quality of intrinsic material now available and the challenges in making doped structures suitable for practical devices. Two practical applications are considered in detail. First, the development of high-voltage switches capable of switching voltages in excess of 10kV. Second, the development of diamond MESFETs for high-frequency and high-power applications. Here device data are reported showing a current density of more than 30mAmm -1 along with small-signal RF measurements demonstrating gigahertz operation. We conclude by considering the remaining challenges which will need to be overcome if commercially attractive diamond electronic devices are to be manufactured.
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| 8. |
- Falconer, D., et al.
(författare)
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New Air-interface Technologies and Deployment Concepts
- 2006
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Ingår i: Technologies for the Wireless Future: Wireless World Research Forum (WWRF). - Chichester, UK : John Wiley & Sons. - 0470029056 - 9780470029053 ; , s. 131-226
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 9. |
- Farrell, W. M., et al.
(författare)
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Electron density dropout near Enceladus in the context of water-vapor and water-ice
- 2009
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Ingår i: Geophysical Research Letters. - 0094-8276 .- 1944-8007. ; 36:10, s. L10203-
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Tidskriftsartikel (refereegranskat)abstract
- On 12 March 2008, the Cassini spacecraft made a close encounter with the Saturnian moon Enceladus, passing within 52 km of the moon. The spacecraft trajectory was intentionally-oriented in a southerly direction to create a close alignment with the intense water-dominated plumes emitted from the south polar region. During the passage, the Cassini Radio and Plasma Wave System (RPWS) detected two distinct radio signatures: 1) Impulses associated with small water-ice dust grain impacts and 2) an upper hybrid (UH) resonance emission that both intensified and displayed a sharp frequency decrease in the near-vicinity of the moon. The frequency decrease of the UH emission is associated with an unexpectedly sharp decrease in electron density from similar to 90 cl/cm(3) to below 20 cl/cm(3) that occurs on a time scale of a minute near the closest encounter with the moon. In this work, we consider a number of scenarios to explain this sharp electron dropout, but surmise that electron absorption by ice grains is the most likely process.
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