An experimental investigation of the thermal conductivity and electrical resistivity of three porous 304L stainless steel 'Rigimesh' materials to 1300 K Interim report

Thermal conductivity and electrical resistivity measurements for three porous Rigimesh stainless steel materials from 300 to 1300

The thermal conductivity of two thermal insulating materials Final report

Test methods and procedures to determine thermal conductivity of polyurethane foam and aluminized Myla

Thermophysical properties of hot pressed beryllium

Experimental measurements of thermal conductivity, electrical resistivity, and specific heat with hot pressed beryllium specimen

Thermal energy storage material thermophysical property measurement and heat transfer impact

The thermophysical properties of salts having potential for thermal energy storage to provide peaking energy in conventional electric utility power plants were investigated. The power plants studied were the pressurized water reactor, boiling water reactor, supercritical steam reactor, and high temperature gas reactor. The salts considered were LiNO3, 63LiOH/37 LiCl eutectic, LiOH, and Na2B4O7. The thermal conductivity, specific heat (including latent heat of fusion), and density of each salt were measured for a temperature range of at least + or - 100 K of the measured melting point. Measurements were made with both reagent and commercial grades of each salt

Flora of Kiritimati (Christmas) Atoll, Northern Line Islands, Republic of Kiribati

This paper is a compilation and analysis of all vascular plants that have been reported on Kiritimati (Christmas) Atoll in the Northern Line Islands of the Republic of Kiribati. It is based on field inventories conducted by the authors on six field visits to the atoll between 1996 and 2012 plus available published and unpublished records of vascular plant collections and observations made on the atoll. The total number of vascular plant species that have been recorded at some time on Kiritimati, including all indigenous and introduced species (whether in cultivation or not) is 168, plus three hybrids and three additional varieties, making a total of 174 taxa. Of these, three records are doubtful, leaving a reliably reported total of 171 taxa in 166 species. Only 10 of the reported taxa were not seen by one or other of us in the period 1996–2012, and of these at least six have probably died out on the island, leaving an extant flora of around 165 reliably recorded taxa (including the hybrids and varieties) in 160 species. There have been no ferns or gymnosperms recorded on the island. Probably only 15 (9%) or perhaps up to 19 of the reliably reported species are native, and most of the present-day flora is made up of deliberate or unintentional introductions made since the date of European discovery of the atoll. Of these, at least 54 and perhaps up to 59 species have naturalized

Cyber event artifact investigation training in a virtual environment

The Internet has created many new technology advances that make everyday life easier and more efficient. However, technology has also enabled new attack capabilities and platforms that have the potential to cripple Department of Defense (DOD) and civilian information systems and cyber infrastructure. In order to minimize damages these threats could cause, the DOD needs well-trained operators and skilled cyber incident first responders at the helm. The first portion of this research focused on identifying operating system artifacts that give first responders the best information with which to identify if a cyber incident has occurred, or is occurring, and to determine the type of incident. The second portion of this research focused on developing virtual environments where students can participate in guided training and challenge labs. These labs can train system operators to recognize incident indicators and allow first responders to focus on collecting necessary information quickly. The Training Lab focuses on leading the student through an investigation of each designated artifact, while the Challenge Lab provides less guidance in order to test the students' acquired skills. This partnered learning experience should lead to more proficient cyber incident reporting and should decrease the response delay between detection and recovery.http://archive.org/details/cybereventrtifac1094556767Outstanding ThesisLieutenant, United States NavyApproved for public release; distribution is unlimited

Exploring a string-like landscape

We explore inflationary trajectories within randomly-generated two-dimensional potentials, considered as a toy model of the string landscape. Both the background and perturbation equations are solved numerically, the latter using the two-field formalism of Peterson and Tegmark which fully incorporates the effect of isocurvature perturbations. Sufficient inflation is a rare event, occurring for only roughly one in $10^5$ potentials. For models generating sufficient inflation, we find that the majority of runs satisfy current constraints from WMAP. The scalar spectral index is less than 1 in all runs. The tensor-to-scalar ratio is below the current limit, while typically large enough to be detected by next-generation CMB experiments and perhaps also by Planck. In many cases the inflationary consistency equation is broken by the effect of isocurvature modes.Comment: 24 pages with 8 figures incorporated, matches version accepted by JCA

Understanding the controls on sediment-P interactions and dynamics along a non-tidal river system in a rural–urban catchment: the River Nene

The release of Phosphorus (P) from river sediments has been identified as a contributing factor to waters failing the criteria for ‘Good Ecological Status’ under the EU Water Framework Directive (WFD). To identify the contribution of sediment-P to river systems, an understanding of the factors that influence its distribution within the entire non-tidal system is required. Thus the aims of this work were to examine the (i) total (PTotal) and labile (PLabile) concentrations in sediment, (ii) the sequestration processes and (iii) the interactions between sediment P and the river water in the six non-tidal water bodies of the River Nene, U.K. Collection of sediments followed a long period of flooding and high stream flow. In each water body, five cores were extracted and homogenised for analysis with an additional core being taken and sampled by depth increments. Comparing the distribution of sediment particle size and PTotal data with soil catchment geochemical survey data, large increases in PTotal were identified in sediments from water body 4–6, where median concentrations of PTotal in the sediment (3603 mg kg−1) were up to double those of the catchment soils. A large proportion of this increase may be related to in-stream sorption of P, particularly from sewage treatment facilities where the catchment becomes more urbanised after water body 3. A linear correlation (r = 0.8) between soluble reactive phosphate (SRP) and Boron in the sampled river waters was found suggesting increased STW input in water bodies 4–6. PLabile concentrations in homogenised cores were up to 100 mg kg−1 PO4–P (generally < 2% of PTotal) and showed a general increase with distance from the headwaters. A general increase in Equilibrium Phosphate Concentrations (EPC0) from an average of 0.9–∼1.7 μm L−1 was found between water bodies 1–3 and 4–6. Fixation within oxalate extractable phases (Al, Fe and Mn) accounted for ∼90% of P binding in water bodies 4–6, but only between 31 and 74% in water bodies 1–3. Statistical models predicting PTotal (R2 = 0.78), oxalate extractable P (R2 = 0.78) and Olsen P (R2 = 0.73) concentrations in river sediments identified Mn oxy-hydroxides (MnOx) as a strong predictive variable along with the location within the river system. It is suggested that MnOx within model predictions is identifying a pool of mixed Fe–Mn oxy-hydroxides (MnOx–FeOOH) or Fe oxy-hydroxide (FeOOH) from the wider FeOxalate pool that are particularly effective at sorbing and fixing P. The findings demonstrate how sediment and P may accumulate along a 100 km non-tidal river system, the extent to which a range of processes can fix P within mineral phases and how natural flooding processes may flush sediment from the river channel. The processes identified in this study are likely to be applicable to similar river systems over their non-tidal water bodies in eastern England

Architecture, physical activity and a capability evaluative framework: satisfaction is not enough

Despite recognition that building design can contribute to human health by facilitating increased incidental physical activity, knowledge of how building design can enable this is underdeveloped. Further, there is evidence that design features introduced to support routine physical activity and improve occupant satisfaction may not necessarily lead to increases in actual physical activity. Evaluative frameworks encompassing a range of individual, organisational and built environment factors that contribute to shaping occupant behaviour may provide insight into how buildings can support greater levels of routine physical activity. This paper argues that capability theory can inform our understandings of the dynamic interrelationship between building design and building use. In this paper we describe our approach to developing a framework for capabilities-based evaluation of buildings and building occupant physical activity. Based on a capability perspective we consider the intersection of building ‘domains’ and ‘functionings’ that influence occupant physical activity; and question how such evaluations could account for a range of occupants. The research is of relevance to those engaged in the production of architectural environments and evaluation tools that support physical activity—inclusive of building designers, procurers, managers and occupants