Collisional ionization rates for lithium and beryllium-like ions

Collisional ionization rates for lithium and beryllium-like ions deduced from time history of spectral lines emitted by these ions in hot plasma

Cavity reactor critical experiment, volume 3

Cavity reactor critical experiment - volume

Cavity reactor critical experiment, volume 4 (waves and control methods)

Fuel wave formation and control in coaxial flowing gas cavity reactor for space nuclear propulsio

The revival of high-rise living in the UK and issues of cost and revenue in relation to height

The following report explores the recent revival of tall residential buildings in the UK as well as issues of costs and revenues for such projects. The first part of the paper focuses on the background and the preconditions of the revival. The history of tall residential buildings and its impact on the image of highrise living is explored as well as some of the debate that surrounds the topic. However, the vast amount of related social, urban design and environmental issues are not part of the analysis. The phenomenon of the revival is described in numbers of completed buildings and with examples of built and proposed projects. Characteristics like the new type of occupiers and the provision of affordable housing are highlighted. The second part of the report and the main part of the research focus on the economic drivers behind tall residential developments. The issues of building costs and sales prices in relation to height are explored and values are gathered in several interviews with professionals. The findings are analysed and applied in a series of model calculations for developments with heights from 5 – 50 storeys. It seems that the disadvantages of building high are not balanced out by a premium in sales prices for height. The evidence found suggests that the economics of tall residential buildings change dramatically above 20 storeys. This corresponds with the height of structures that were built in recent years. However, the paper concludes that the data available was not sufficient to establish robust quantitative relationships between residential developments of different heights and that it is necessary for the benefit of all that more research on this topic is made publicly available

Experimental rate coefficients for collisional excitation of lithium-like ions

Collisional excitation rates for lithium-like ions derived from diagnosed plasma produced in theta pinch device and line intensities emitted by these ion

Is Oral Dexamethasone Safe and Effective for Treating Asthma Exacerbations In Pediatric Patients?

OBJECTIVE: The objective of this selective evidence based medicine review is to determine whether or not a one or two dose regimen of dexamethasone (DEX) is a safe and effective treatment for asthma exacerbations in the pediatric population. STUDY DESIGN: Review of three English language, primary randomized controlled trials (RCT) published from 2001-2008. DATA SOURCES: Three RCTs examining the efficacy of DEX either in a single dose or one dose for two days, compared to a traditional five day regimen of prednisone (PRED). OUTCOMES MEASURED: The studies examined the number of relapses within 10 days of using DEX or PRED, the number of subjects with unscheduled returns to the emergency department (ED) or other health care facility within 5 days, and episodes of emesis after administration of drug in the ED and at home within 5 days. RESULTS: These studies concluded that both a single dose and two doses of DEX were no less effective than a five day regimen of PRED, specifically in regards to relapse rates and time to recovery. DEX did not lead to a higher rate of emesis than PRED either in the ED or within five days of initial treatment. CONCLUSIONS: DEX is equally effective to PRED in the treatment of acute asthma exacerbations in pediatric patients, and does not lead to a greater rate of emesis within 5 days of treatment. Because DEX can be administered in a single dose or in a two day regimen, instead of the five day regimen required of PRED, patients may be more satisfied and have a higher compliance rate by using DEX

Simplified models of electromagnetic and gravitational radiation damping

In previous work the authors analysed the global properties of an approximate model of radiation damping for charged particles. This work is put into context and related to the original motivation of understanding approximations used in the study of gravitational radiation damping. It is examined to what extent the results obtained previously depend on the particular model chosen. Comparisons are made with other models for gravitational and electromagnetic fields. The relation of the kinetic model for which theorems were proved to certain many-particle models with radiation damping is exhibited

Feasibility study of full-reactor gas core demonstration test

Separate studies of nuclear criticality, flow patterns, and thermodynamics for the gas core reactor concept have all given positive indications of its feasibility. However, before serious design for a full scale gas core application can be made, feasibility must be shown for operation with full interaction of the nuclear, thermal, and hydraulic effects. A minimum sized, and hence minimum expense, test arrangement is considered for a full gas core configuration. It is shown that the hydrogen coolant scattering effects dominate the nuclear considerations at elevated temperatures. A cavity diameter of somewhat larger than 4 ft (122 cm) will be needed if temperatures high enough to vaporize uranium are to be achieved

Application of Neural Networks for Energy Reconstruction

The possibility to use Neural Networks for reconstruction of the energy deposited in the calorimetry system of the CMS detector is investigated. It is shown that using feed - forward neural network, good linearity, Gaussian energy distribution and good energy resolution can be achieved. Significant improvement of the energy resolution and linearity is reached in comparison with other weighting methods for energy reconstruction.Comment: 18 pages, 13 figures, LATEX, submitted to: Nuclear Instruments & Methods