Environmental calibration chamber operations

Thermal vacuum capabilities are provided for the development, calibration, and functional operation checks of flight sensors, sources, and laboratory and field instruments. Two systems are available. The first is a 46 cm diameter diffusion pumped vacuum chambler of the bell jar variety. It has an internal thermal shroud, LN2 old trap, two viewing ports, and various electrical and fluid feedthroughs. The other, also an oil diffusion pumped system, consists of a 1.8 m diameter by 2.5 m long stainless steel vacuum tank, associated pumping and control equipment, a liquid nitrogen storage and transfer system and internal IR/visible calibration sources. This is a two story system with the chamber located on one floor and the pumping/cryogenic systems located on the floor below

Maximum Likelihood Method for Predicting Environmental Conditions from Assemblage Composition: The R Package bio.infer

This paper provides a brief introduction to the R package bio.infer, a set of scripts that facilitates the use of maximum likelihood (ML) methods for predicting environmental conditions from assemblage composition. Environmental conditions can often be inferred from only biological data, and these inferences are useful when other sources of data are unavailable. ML prediction methods are statistically rigorous and applicable to a broader set of problems than more commonly used weighted averaging techniques. However, ML methods require a substantially greater investment of time to program algorithms and to perform computations. This package is designed to reduce the effort required to apply ML prediction methods.

Communiqué No. 19: Recession Pressures on Nonprofit Jobs

Summarizes findings from a national survey on nonprofit employment that was conducted in April 2010. The report describes evidence of workforce strain during the current recession with increased demand for services. Nonprofit have also demonstrated resilience in maintaining staffing levels

The Central Florida Mosaic Interface - Stage II

This proposal is for a Level II grant for $50,000 to complete the second phase of the Central Florida Mosaic Interface (CFMI). The intellectual foundation for the CFMI is based on and will address two issues: regional identity in Central Florida, and the problem of usability of interactive websites for specific audiences. Regional identity is being addressed through already-funded public humanities projects based on Central Florida history. The content from these established projects will funnel into the CFMI. Usability will be addressed through the unique tools for bridging the gap between accessibility and practicability, including natural language search capabilities, tools for extracting relationships, and interpretive information aimed toward casual users and beginning researchers. The second phase specifically entails incorporating natural language search capabilities into the functionality of the database and expanding the base of sources

Communiqué No. 16: Escalating Pension Benefit Costs -- Another Threat to Nonprofit Survival?

Provides findings from a national survey of nonprofits that examines the benefits of nonprofit retirement programs, explores the financial stress the plans are under, and describes the coping strategies developed by organizations

Communiqué No. 15: Health Care and Nonprofits: The Hidden Dimension of America's Health Care Crisis

Providings findings from a national survey that examines how nonprofits and their employees are affected by rising health care costs

Stochastic level-set method for shape optimisation

We present a new method for stochastic shape optimisation of engineering structures. The method generalises an existing deterministic scheme, in which the structure is represented and evolved by a level-set method coupled with mathematical programming. The stochastic element of the algorithm is built on the methods of statistical mechanics and is designed so that the system explores a Boltzmann-Gibbs distribution of structures. In non-convex optimisation problems, the deterministic algorithm can get trapped in local optima: the stochastic generalisation enables sampling of multiple local optima, which aids the search for the globally-optimal structure. The method is demonstrated for several simple geometrical problems, and a proof-of-principle calculation is shown for a simple engineering structure.Comment: 17 pages, 10 fig

Mobile radio alternative systems study, executive summary

Present day mobile communication technologies, systems and equipment are described from background in evaluating the concepts generated in the study. Average propagation ranges are calculated for terrestrial installations in each of seven physiographic areas of the contiguous states to determine the number of installations that would be required for nationwide coverage. Four system concepts are defined and analyzed to determine how well terrestrial systems can fulfill the requirements at acceptable costs