Alien Registration- Caron, David (Lewiston, Androscoggin County)

https://digitalmaine.com/alien_docs/29724/thumbnail.jp

Developing R&D capacity in a primary care trust : use of the R&D culture index

There has traditionally been a low level of engagement of primary care practitioners with research. In the UK, primary care trusts (PCTs) now have some responsibility for the encouragement of research and development in primary care. The aim of this study was to assess the current level of research activity and capacity for research within a PCT. A questionnaire, incorporating a recently developed and validated research and development culture index, was sent to all 572 health care professionals and staff under the auspices of North Tyneside Research PCT. Data analysis used nonparametric tests of association including chi-squared, Mann–Whitney U and Spearman's rank order correlation. There was a 50.3 per cent response rate to the questionnaire. Groups more likely to show an increased capacity for research included those with postgraduate qualifications and those in post for the least time. General practitioners were less likely than other professional groupings to declare personal skills or aptitude for research. The two most important factors thought to contribute towards the development of a culture of R&D were having access to people to support development and changes in professional practice and having access to training and development opportunities. The use of the R&D culture index enabled groups to be identified that may be more research interested and can therefore be targeted to increase research capacity. The R&D culture index could be used by other PCTs wishing to define and develop research capacity in primary care

Investigation Of Ions Accelerated Through Electrostatic Menisci In An Inductively Coupled Plasma

Plasmas are used in semiconductor fabrication as they allow for very precise control over processes such as etching and doping. This is achieved by extracting a beam of ions from the plasma to interact with and modify the surface of a silicon wafer. However, conventional fabrication methods are reaching spatial limitations as semiconductor features reach the atomic scale. Therefore, in order to better control the fabrication processes and facilitate the transition to three-dimensional architecture, a greater understanding of ion beam formation is needed. Ion beams are extracted at the boundary between the Debye sheath and an externally applied potential, which forms a unipolar sheath. This boundary, known as the plasma meniscus, is dependent on source parameters and acts as an electrostatic lens for ions that traverse it. This allows for control of ion beam properties through the adjustment of the source parameters that affect the meniscus. Presented here is an investigation into the plasma meniscus and the dependence of its topology on controllable source parameters. The plasma meniscus is formed by graphite extraction optics with a 5 mm square aperture for beam extraction. 12 mm from the aperture is an electrically isolated graphite wafer that is biased to different potentials. Laser induced fluorescence is employed to obtain ion velocity distribution functions: inside the inductively coupled plasma source, at the extraction aperture, and in the downstream ion beam. The use of the confocal telescope allows for first, non-perturbative measurements of ions inside an inductively coupled plasma source. The ion source power is varied (Pf = 1 kW, 2 kW, 3 kW, 4 kW) at different applied wafer bias voltages (Vb = 0 V, 1000 V, 2000 V, 3000 V). Ion temperature, velocity, and relative density are calculated from the ion velocity distribution functions. The ions\u27 speed increases as they travel through the source and form the beam. Additionally, there is a second population of ions that appears near the plasma meniscus. These ions form a beam halo, which hinders the creation of a uniform ion beam. This effect is mitigated at a sufficiently high bias voltage

The role of heterotrophic microflagellates in plankton communities

Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution June 1984The distribution and feeding behavior of bacterivorous micro flagellates (2-20 μm protozoa) and their ingestion by copepods were examined in an attempt to assess the importance of these protozoa as a trophic link between planktonic bacteria and zooplankton. The abundance of microflagellates relative to other picoplankton (0.2-2.0 μm) and nanoplankton (2-20 μm) populations in water samples in the North Atlantic and in Lake Ontario and on macroaggregates in the North Atlantic was determined using direct microscopical and culture estimation techniques. Seasonal, vertical and geographical changes in the density of microflagellates were generally not greater than one order of magnitude. Microscopical counts of heterotrophic nanoplankton (presumably microflagellates) typically ranged from a few hundred to a few thousand m1-1 for a variety of planktonic environments. They constituted approximately 1/3 to 1/2 of the nanoplankton in the euphotic zone and dominated the nanoplankton in the aphotic zone. Most Probable Number (MPN) estimation of the density of bacterivorous protozoa indicated that microflagellates were, on average, an order of magnitude more abundant than bacterivorous ciliates and amoebae. MPN and direct microscopical counts of microflagellates differed by as much as 104. This discrepancy was smaller in eutrophic environments (e.g. Continental Shelf and Lake Ontario) and on macroscopic detrital aggregates. All microbial populations enumerated were highly concentrated on macroscopic detrital aggregates relative to their abundance in the water surrounding the aggregates. Enrichment factors (the ratio of abundance of a population on a macroaggregate to its abundance in the surrounding water) increased along a eutrophic-to-oligotrophic gradient because of the combined effects of an increased abundance of microorganisms on macroaggregates in oligotrophic environments and a decreased abundance in the surrounding water in these same environments. Average enrichment factors for direct microscopical counts of heterotrophic nanoplankton (range = 17-114) were not as large as enrichment factors observed for MPN estimates of the number of bacterivorous microflagellates (range = 273-18400). Microflagellates numerically dominated the bacterivorous protozoa cultured from macroaggregates by one to two orders of magnitude, but ciliates and amoebae were also highly enriched on macroaggregates. Microenvironments are therefore a potentially important aspect for the ecology of planktonic microorganisms. Observations on the microbial colonization of mucus sloughed by ctenophores and discarded appendicularian houses suggest that these materials may be important sources of macroaggregates. Batch and continuous culture experiments were conducted with clonal cultures of microflagellates to test their ability to grow on various types and densities of bacteria. The doubling time of Monas sp. 1 ranged from 43 hr (when fed the cyanobacterium Synechococcus Strain WH 8101) to 6.9 hr (when fed the heterotrophic bacterium Serratia marinorubra). Cell yields (i.e. the conversion of bacterial biomass into protozoan biomass) of Monas sp. 1 fed two species of heterotrophic bacteria were greater than yields for the microflagellate fed two species chroococcoid cyanobacteria (range = 7-68%). Cell yields of two other species of microflagellates (Monas sp. 2 and Cryptobia maris) were 48% and 61%, respectively, on the bacterium Pseudomonas halodurans. Microflagellates grew in continuous culture at concentrations of bacteria which were lower than bacterial densities required for the growth of ciliates as shown by other investigations. Therefore, microflagellates appear to be well-adapted for grazing bacterioplankton. Microflagellates were also investigated for their ability to graze bacteria attached to particles. Bodo nanorensis and Rhynchomonas nasuta both showed a marked ability to graze attached bacteria and a limited ability to graze unattached cells. These results suggest that microflagellates may also be important consumers of bacteria attached to particles in the plankton and may explain the highly elevated densities of microflagellates on macroaggregates. Grazing experiments performed with the copepod Acartia tonsa indicated that heterotrophic microflagellates were ingested by the copepods at rates comparable to the ingestion of phytoplankton of similar size. The presence of heterotrophic microflagellates did not depress filtration rates of the copepods, and one species (Cryptobia maris) appeared to be selectively grazed. Survival of A. tonsa on a diet of heterotrophic microflagellates was similar to survival on a diet of phytoplankton and was significantly longer than survival of starved Controls or copepods fed only bacteria. Due to their ability to grow at in-situ densities of planktonic bacteria, their relatively high cell yields, and their acceptability as food for zooplankton, it is concluded that bacterivorous microflagellates may constitute an important trophic link between bacteria and zooplankton. This link may provide a mechanism whereby organic material and energy from the detrital food chain can be returned to the classical phytoplankton-copepod-fish food chain.This research was supported by National Science Foundation grants OCE80-2444l and OCE82-l4928 and Ocean Industry Program grant 4473 awarded to Dr. Laurence P. Madin, NSF Doctoral Dissertation grant OCE8l-l299l, the Woods Hole Oceanographic Institution Education Program and the Wood Hole Oceanographic Institution Biology Department

Two-sample Bayesian Nonparametric Hypothesis Testing

In this article we describe Bayesian nonparametric procedures for two-sample hypothesis testing. Namely, given two sets of samples $\mathbf{y}^{\scriptscriptstyle(1)}\;$\stackrel{\scriptscriptstyle{iid}}{\s im}$\;F^{\scriptscriptstyle(1)}$ and $\mathbf{y}^{\scriptscriptstyle(2 )}\;$\stackrel{\scriptscriptstyle{iid}}{\sim}$\;F^{\scriptscriptstyle( 2)}$, with $F^{\scriptscriptstyle(1)},F^{\scriptscriptstyle(2)}$ unknown, we wish to evaluate the evidence for the null hypothesis $H_0:F^{\scriptscriptstyle(1)}\equiv F^{\scriptscriptstyle(2)}$ versus the alternative $H_1:F^{\scriptscriptstyle(1)}\neq F^{\scriptscriptstyle(2)}$. Our method is based upon a nonparametric P\'{o}lya tree prior centered either subjectively or using an empirical procedure. We show that the P\'{o}lya tree prior leads to an analytic expression for the marginal likelihood under the two hypotheses and hence an explicit measure of the probability of the null $\mathrm{Pr}(H_0|\{\mathbf {y}^{\scriptscriptstyle(1)},\mathbf{y}^{\scriptscriptstyle(2)}\}\mathbf{)}$.Comment: Published at http://dx.doi.org/10.1214/14-BA914 in the Bayesian Analysis (http://projecteuclid.org/euclid.ba) by the International Society of Bayesian Analysis (http://bayesian.org/

Trajectory design for autonomous underwater vehicles based on ocean model predictions for feature tracking

Trajectory design for Autonomous Underwater Vehicles (AUVs) is of great importance to the oceanographic research community. Intelligent planning is required to maneuver a vehicle to high-valued locations for data collection. We consider the use of ocean model predictions to determine the locations to be visited by an AUV, which then provides near-real time, in situ measurements back to the model to increase the skill of future predictions. The motion planning problem of steering the vehicle between the computed waypoints is not considered here. Our focus is on the algorithm to determine relevant points of interest for a chosen oceanographic feature. This represents a first approach to an end to end autonomous prediction and tasking system for aquatic, mobile sensor networks. We design a sampling plan and present experimental results with AUV retasking in the Southern California Bight (SCB) off the coast of Los Angeles

Reinventing Maine Government: How Mainers Can Shape a Sustainable Government and a New Prosperity

In this commentary the authors highlight the challenges Maine faces. They suggest areas where the state could spend less, based on national comparative figures. They discuss what they call the “three ticking time bombs” in the state: the aging workforce, unfunded pension liabilities, and escalating costs of healthcare, and review what they consider to be inefficient structures in government at all levels. They argue that new thinking and new approaches are needed, and make a number of recommendations for “reinventing government” in Maine