Economic and Organizational Issues in Alaska Water Quality Management

The work upon which this report (Proj. A-029-ALAS) is based was supported by funds provided by the United States Department of the Interior, Office of Water Resources Research, as authorized under the Water Resources Act of 1964

Sea Turtle Observations at Explosive Removals of Energy Structures

Observers were placed at offshore sites to monitor and protect sea turtles during explosive removals of oil and gas structures in the Gulf of Mexico off Louisiana and Texas. Data collected during more than 6,500 hours of monitoring at 106 structure removals in 1992 provided information on sea turtle distribution. Eighteen individuals were observed including 10 loggerheads, 2 leatherbacks, 1 hawksbill, and 5 unidentified sea turtles. The observation rate (individuals per monitoring hour) of sea turtles was about 30 times higher during aerial surveys than during day or night suiface surveys

IAC user manual

The User Manual for the Integrated Analysis Capability (IAC) Level 1 system is presented. The IAC system currently supports the thermal, structures, controls and system dynamics technologies, and its development is influenced by the requirements for design/analysis of large space systems. The system has many features which make it applicable to general problems in engineering, and to management of data and software. Information includes basic IAC operation, executive commands, modules, solution paths, data organization and storage, IAC utilities, and module implementation

The language socialization paradigm for SLA: What's in it for you?

Watson-Gegeo (2001) tells us that we are “at the beginning of a paradigm shift in the human and social sciences” that is “fundamentally transforming second language acquisition (SLA) and educational theory and research” (p. 1). Watson-Gegeo is not very forthcoming as to the nature of either the old paradigm or the new one; and indeed, one of the problems with her paper is the absence of anything that could be called evidence. Still, based on what she sees as this emerging new paradigm, she is explicit in arguing that we need a new paradigm for SLA, what she calls the “language socialization paradigm”. I propose to look at the new cognitive science as Watson-Gegeo conceives it, and at her proposals for SLA research. It will be seen that her account of the former is generally vacuous or irrelevant where it is not simply incorrect, while the latter show little promise for a productive research program for SLA

Optical Detection Properties of Silicon-Germanium Quantum Well Structures

A study has been carried out on Si/SiGe multi quantum well structures to determine their applicability as normal incidence infrared detectors in the spectral range of 2-12 micrometers. The research effort was primarily experimental; however, extensive calculations were performed to initially explain the experimental data and then used to design subsequent structures. Multiple quantum well structures grown on both Si[001] and Si[110] substrates via molecular beam epitaxy were studied by photoluminescence, absorption, and photoresponse measurements over a wide parameter space. Variables included quantum well depth and width, well doping, number of wells and growth temperature. Well widths were varied from 20Å to 50Å, Ge composition from 10% to 60%, boron doping from 1 x 1018 cm-3 to 8 x 1019 cm-3, number of wells from 5 to 30 and growth temperature from 550 to 710 °C. Calculations using k.p theory and the envelope function approximation were performed to determine the position of the bound states in the wells, the amount of band mixing and the transition strengths for bound-to-bound transitions for Si[001]/Si1-xGe sub x, Si[110]/Si1-xGex and GaAs/AlGaAs quantum well structures. The Si[110] structures have more allowed energy bands which are significantly mixed. A comparison was made between Si[001]/Si1-xGex, Si[110]/Si1-xGex and GaAs/AlGaAs quantum well structures designed to operate in the 8-12 µm region, and all three showed comparable momentum matrix elements

It\u27s Not So Simple: The Role of Simplicity in Science and Theory.

The principle of simplicity (parsimony) has long been invoked as a regulative principle that helps guide theory selection in science. However, it is unclear if there is justification for a globally applicable criterion of parsimony. This paper briefly reviews the salient features of what it means for something to be simple, as well as argues for simplicity as relevant only to a set of background assumptions

Understanding the Experiences of Occupational Therapists Assessing and Treating Functional Cognition Following Stroke

Background. Stroke is one of the leading causes of long-term disability in the United States, with many stroke survivors experiencing cognitive impairment. Despite the prevalence and impact of cognitive impairment amongst the post stroke population, the evidence for functional cognition assessment and intervention in occupational therapy practice is not well described, and there is currently no evidence available exploring the perceptions of occupational therapists regarding functional cognition for stroke survivors. Purpose. The purpose of this study is to explore the perceptions of occupational therapists assessing and treating functional cognition in individuals following stroke. Methods. This qualitative descriptive study included occupational therapists working in various clinical settings where they assess and treat individuals following stroke. The study included one-on-one virtual interviews with participants which were analyzed using an inductive approach to thematic analysis. Results. From participant responses, three key themes and associated subthemes arose from the data. The themes highlighted that knowledge, observation, and interdisciplinary care matter for addressing functional cognition. Conclusion. Occupational therapists who treat individuals with cognitive impairment identify occupational analysis and occupation-based interventions as the most beneficial tools in assessing and treating cognition, and found that objective and standardized methods to address cognition are limited due to the barriers of health service delivery or the assessment itself. Therapists also lack confidence with addressing functional cognition due to difficulty capturing objective data in performance-based assessments, and due to lack of training in professional education programs. Finally, this study emphasizes the value of interdisciplinary care in stroke rehabilitation across settings