1,714 research outputs found

    Major Factors Influencing the Competitiveness of the California Strawberry Subsector

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    With its nearly year-round supply and 83% market share, the California strawberry subsector dominates production and distribution of fresh strawberries in North America. The subsector has achieved its leading position among competitive production regions (e.g., Florida and Oregon) through the development and interaction of several factors. These factors include the following: superior agro-ecological conditions, economies of size, technological innovation, favorable demand conditions, marketing flexibility, and support infrastructure.Industrial Organization,

    News Clipping - 1950, October 28 - Beaver Dam to Observe 100th Birthday in Special Services

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    News clipping on Beaver Dam Baptist Church\u27s 100th anniversary celebration.https://digitalcommons.gardner-webb.edu/fay-webb-gardner-beaver-dam-baptist-church/1001/thumbnail.jp

    Effective Organizational Practices for Middle and High School Grades

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    At the request of the Accountability Review Council, Research for Action identified effective organizational practices used by better performing schools serving substantial numbers of low income middle and high school students in the School District of Philadelphia. These practices are organized into three spheres: Conditions for Teaching, Student-Centered School Community, and Instructional Program. For each sphere, the report offers broad strategies and specific practices to enact the strategies. Nuanced school case studies show how the practices can work synergistically and coherently in schools to help students succeed

    Treatment of amblyopia with a plus lens: A literature review and case reports

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    Theories on the pathogenesis of amblyopia are reviewed. The history and description of various methods of amblyopia treatment are reported. Next, the advantages of optical penalization over other methods of amblyopia treatment are given, with a description of testing which should be done in order to screen for appropriate patients. A literature review on success rates for various methods of amblyopia treatment is given. Finally, five original case reports are given in which optical penalization has been used with success

    Genealogical typing of Neisseria meningitidis

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    Despite the increasing popularity of multilocus sequence typing (MLST), the most appropriate method for characterizing bacterial variation and facilitating epidemiological investigations remains a matter of debate. Here, we propose that different typing schemes should be compared on the basis of their power to infer clonal relationships and investigate the utility of sequence data for genealogical reconstruction by exploiting new statistical tools and data from 20 housekeeping loci for 93 isolates of the bacterial pathogen Neisseria meningitidis. Our analysis demonstrated that all but one of the hyperinvasive isolates established by multilocus enzyme electrophoresis and MLST were grouped into one of six genealogical lineages, each of which contained substantial variation. Due to the confounding effect of recombination, evolutionary relationships among these lineages remained unclear, even using 20 loci. Analyses of the seven loci in the standard MLST scheme using the same methods reproduced this classification, but were unable to support finer inferences concerning the relationships between the members within each complex

    Influence of quantum well and barrier composition on the spectral behavior of InGaAs quantum dots-in-a-well infrared photodetectors

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    We report on the spectral behavior of two different quantum dots-in-a-well infrared photodetectors grown by low-pressure metal-organic chemical vapor deposition.In₀.₅Ga₀.₅Asquantum dots embedded in an In₀.₁₅Ga₀.₈₅As/GaAsquantum well(QW) or a GaAs/Al0.2Ga0.8AsQW have been incorporated into photodetectors and were characterized. A spectral response in the 3–5μm atmospheric window has been achieved by adopting the GaAs∕Al₀.₂Ga₀.₈AsQW.The Australian Research Council is gratefully acknowledged for the financial support

    Making A Difference: Year Two Report of the Pennsylvania High School Coaching Initiative

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    This report examines the implementation of the second year of three for the Pennsylvania High School Coaching Initiative (PAHSCI). Funded by the Annenberg Foundation, this initiative focuses on literacy and math coaches providing support to teachers from across the major subject areas to create literacy-rich classrooms in which students actively engage in learning tasks that deepen their content knowledge and strengthen their abilities to think critically and communicate well. This report presents findings from the first two years of research. It includes survey research as well as in-depth qualitative research in participating schools and districts and provides recommendations for PAHSCI stakeholders as they refine the program and for other education reformers as they consider the benefits of instructional coaching as a strategy for improving high schools and student achievement

    Match- mismatch Regulation for Bluegill and Yellow Perch Larvae and Their Prey in Sandhill Lakes

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    Food availability may regulate fish recruitment, both directly and indirectly. The availability of zooplankton, especially to newly hatched larvae, is thought to be crucial to their early growth and survival. We examined stomach contents of larval bluegill Lepomis macrochirus and yellow perch Perca flavescens in Pelican Lake and Cameron Lake, Nebraska, in 2004 and 2005. We also determined zooplankton availability and calculated prey selection using Chesson’s a. In addition, we investigated potential match–mismatch regulation of recruitment from 2004 to 2008. Bluegill positively selected copepod nauplii and Bosmina spp., and yellow perch often selected copepods. Abundant zooplankton populations were available for consumption. Matches of both larval bluegill and yellow perch abundance to zooplankton abundance were detected in all years; exact matches were common. Mismatches in predator and prey production were not observed. Predation by age-0 yellow perch on age-0 bluegill was not observed, even though yellow perch hatched 2 mo prior to bluegill. Given that zooplankton were abundant and well-timed to larval fish relative abundance over the time span of this study, the match–mismatch hypothesis alone may not fully account for observed recruitment variability in these populations. Environmental conditions may also affect recruitment and warrant further investigation

    The Effect of Salt and Pyrophosphate on the Structure of Meat

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    Our obective was to determine whether or not salt and pyrophosphate have the same effect on the structure of pieces of meat as they have on isolated myofibrils. Blocks of pig M. longissimus dorsi were incubated in solutions of sodium chloride at pH 5.5 or sodium chloride plus sodium pyrophosphate at pH 5.5 or 8.0. The blocks were obtained from fresh (24h post- mortem) or aged (72h post-mor tem) muscle and incubated for 5 or 24h with minimal agitation. There was considerable uptake of water by the tissue especially at the higher pH and longer times. Electron microscopy of the meat incubated in salt plus pyrophosphate at pH 8.0 revealed complete or nearly complete extraction of the A-band to a depth of at least one fibre from the surface. In meat incubated in salt plus pyrophosphate at pH 5.5 the extraction of the A-band was 1 ess complete and appeared to occur only near the surface. In salt alone no extraction of the A-band occurred. Swelling of myofibrils close to the surface could be detected either by a reduction of density or by greater separation of filaments . Break-up of the Z-line, probably due to mechanical disruption imposed by swelling of myofibrils, was a common feature of the salt treatments. Mitochondria near the surface were grossly swollen, especially with salt plus pyrophosphate at pH 8.0 At low pH amorphous material was observed inside and outside the cell membrane, but at high pH filamentous material was present in these areas
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