Food products for space applications

Specially-prepared foodstuffs supply an astronaut with a diet containing his basic nutritional requirements in a form that is useful in his enironment. Several edible coatings preserve foods and give loose foods form and firmness. These coatings aid in packaging and give the food slip for easy removal from the package

The Urban Institute's Microsimulation Model for Reinsurance: Model Construction and State-Specific Application

Describes the Urban Institute's model for simulating the effects of using state-funded reinsurance to subsidize primary insurance premiums. Details the process of building state-specific baseline databases and modeling reinsurance policy options

Reinsurance in State Health Reform

Based on the experiences of three states, formal modeling, quantitative estimates, and qualitative assessments, explores the impact of and issues involved in publicly funding reinsurance for insurers as a way to expand or maintain private coverage

Effects of radiation on charge-coupled devices

The effects of 1 MeV electron irradiation upon the performance of two phase, polysilicon aluminum gate CCDs are reported. Both n- and p-surface channel and n-buried channel devices are investigated using 64- and 128-stage line arrays. Characteristics measured as a function of radiation dose include: Transfer inefficiency, threshold voltage, field effect mobility, interface state density, full well signal level and dark current. Surface channel devices are found to degrade considerably at less than 10 to the 5th power rads (Si) due to the large increase in fast interface state density caused by radiation. Buried channel devices maintain efficient operation to the highest dose levels used

Evaluation of Phase 2 of the early discharge project of the ‘ASSIST’ team at Mansfield District Council

Project Objective: To provide a longer term independent appraisal of the business case for the continuation of the ASSIST early discharge scheme in Mansfiel

Pair distribution functions calculated from interatomic potential models using the General Utility Lattice Program.

A new module has been developed for the widely used General Utility Lattice\ud Program (GULP). The phonon-based theory developed by Chung & Thorpe\ud [Phys. Rev. B (1999), 59, 4807–4812] to calculate pair distribution function\ud (PDF) peak widths has been utilized to give a selection of commonly used\ud correlation functions. A numerical library of neutron scattering information is\ud now available within GULP, and is used to produce results that can be\ud compared with neutron scattering experimental data. The influence of different\ud phonon modes on the PDF can be assessed by excluding modes above or below\ud a cut-off frequency. Results are presented for sample crystallographic systems,\ud MgO, SrTiO3 and -cristobalite, as well as CaxSr1xTiO3 at x = 0.5, which makes\ud use of the capability to handle partial occupancies to compare different Ca/Sr\ud ordering arrangements with a disordered model in which every Ca/Sr site has\ud 50% occupancy of both species

Design of a Caustic Injection System in a Crude Distillation Unit

Caustic Injection is a high-risk chemical process utilized in many refineries across the world to control overhead corrosion in the atmospheric distillation column of the Crude Distillation Unit. This thesis discusses the considerations that need to be accounted for in the design of a caustic injection system, as well as my own work at an internship where I was a member of a design team that worked to design a caustic injection system for a nearby refinery

Absolute Calibration of a Large-diameter Light Source

A method of absolute calibration for large aperture optical systems is presented, using the example of the Pierre Auger Observatory fluorescence detectors. A 2.5 m diameter light source illuminated by an ultra--violet light emitting diode is calibrated with an overall uncertainty of 2.1 % at a wavelength of 365 nm.Comment: 15 pages, 8 figures. Submitted to JINS

Growth, Condition, and Trophic Relations of Stocked Trout in Southern Appalachian Mountain Streams

Stream trout fisheries are among the most popular and valuable in the United States, but many are dependent on hatcheries to sustain fishing and harvest. Thus, understanding the ecology of hatchery‐reared trout stocked in natural environments is fundamental to management. We evaluated the growth, condition, and trophic relations of Brook Trout Salvelinus fontinalis, Brown Trout Salmo trutta, and Rainbow Trout Oncorhynchus mykiss that were stocked in southern Appalachian Mountain streams in western North Carolina. Stocked and wild (naturalized) trout were sampled over time (monthly; September 2012–June 2013) to compare condition and diet composition and to evaluate temporal dynamics of trophic position with stable isotope analysis. Relative weights (Wr) of stocked trout were inversely associated with their stream residence time but were consistently higher than those of wild trout. Weight loss of harvested stocked trout was similar among species and sizes, but fish stocked earlier lost more weight. Overall, 40% of 141 stomachs from stocked trout were empty compared to 15% of wild trout stomachs (N = 26). We identified a much higher rate of piscivory in wild trout (18 times that of stocked trout), and wild trout were 4.3 times more likely to consume gastropods relative to stocked trout. Hatchery‐reared trout were isotopically similar to co‐occurring wild fish for both δ13C and δ15N values but were less variable than wild trout. Differences in sulfur isotope ratios (δ34S) between wild and hatchery‐reared trout indicated that the diets of wild fish were enriched in δ34S relative to the diets of hatchery‐reared fish. Although hatcheryreared trout consumed prey items similar to those of wild fish, differences in consumption or behavior (e.g., reduced feeding) may have resulted in lower condition and negative growth. These findings provide critical insight on the trophic dynamics of stocked trout and may assist in developing and enhancing stream trout fisheries