409 research outputs found

    Wood Products and Carbon Storage: Can Increased Production Help Solve the Climate Crisis?

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    This report draws on a variety of sources to illuminate the greenhouse gas impacts of wood products and wood biomass fuels throughout their life-cycles. While detailed analyses are rare, the picture is complete enough to show the variability of the processing path followed by different types of trees in various parts of the country. Taking the entire life-cycle of these products into account, it becomes clear that an increased use of wood fuels and lumber will have very little net effect on climate change. To the contrary, the impact is as likely to be negative as positive.The report also takes a closer look at the use of forest-carbon offsets in voluntary or regulatory programs. Because such offsets are expected to balance emissions from other sources, it is important that the additional carbon sequestration be real. This document outlines several criteria for carbon offset standards to account for the full effects of harvested wood carbon

    Chinaman Go Home!: A Socioeconomic and Gendered Examination of the Anti-Chinese Movements of Portland, Oregon and San Francisco, California

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    This thesis examines the Anti-Chinese Movement in Portland, Oregon in relation to that of San Francisco. Contemporary sources indicated a correlation between labor and racism. This correlation is explored in both San Francisco and Portland along with contemporary notions of gender identity in an effort to examine the Anti-Chinese movement using modern social historic theory

    Building Empathy Through Outdoor Education

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    This presentation illustrates the rationale applied in developing the PEMI Youth Center Squam Lake Science Program Feedback Survey (PYCSP Feedback Survey). Existing literature was juxtaposed against the Science Program’s curriculum to produce a research-backed tool. The PYCSP Feedback Survey consists of an individual or parent form. The assessment consists of 18 items, soliciting feedback and measuring program efficacy. In accordance with best practices derived from literature, its administration to all PYC participants is intended to bookend school semesters. Based off what existing literature suggests, we predict the PYCSP Feedback Survey will effectively measure the efficacy of the PYC Science Program

    The Middle Ordovician section in east central Missouri

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    One of the most serious difficulties confronting anyone working on stratigraphic problems in the Ozark area is the lack of detailed faunal lists of the various formations. A great deal of general work has been done, but very few detailed faunal studies have ever been published, and correlation of the Missouri section with sections in adjoining states is often difficult. In a recent paper, Dake has discussed the origin and correlation of the St. Peter sandstone. In this study he found considerable difficulty in correlating the various formations above the St. Peter, and at his suggestion, the present study was undertaken in the hope that additional data regarding the fauna and correlation of these forms would be obtained. The area studied is located in the western part of St. Louis County... The writing of this report was divided as follows: The Introduction was written by the senior author. The junior author has written the description of the sections, has identified the collections and compiled the faunal lists. The identification of the fossils was done under the supervision of the senior author, and he assumes all responsibility for the correctness of these identifications. The junior author is also to be credited with the drafting of the various columnar sections. The sections dealing with correlation and conclusions are the work of both authors --Introduction, pages 1-3

    Extension Educators\u27 Perceptions About the NC 10% Local Food Campaign: Impacts, Challenges, and Alternatives

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    This article reports on the perceptions of Extension educators who served as the Local Food Coordinators (LFCs) in promoting the North Carolina Local Food initiative. The study determined Extension agents\u27 perceptions about the local food campaign, its impacts, campaigning partners, campaign materials, challenges, and alternatives. It was a descriptive survey research conducted with all LFCs in NC. The findings of the study support the notion that promoting local foods has positive impacts on local economies and communities, and has implications for other Extension Services to promote local food campaign as a sustainable community development initiative

    Integrated Pest Management Poster for Farm Markets

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    Unlike organic producers, who widely advertise their produce as organically grown, very few farmers using IPM practices advertise their produce as IPM grown. An IPM poster was developed for farmers asking for help in educating their customers. The posters were displayed in 10 farm markets in New Jersey. The posters and accompanying fact sheets stimulated public interest. Additionally, the poster was well received by the participating growers, and there have been many inquiries about further distribution or availability. The poster is general enough to be used in other states and is available through the Rutgers Cooperative Extension Office of Pest Management

    The metabolic enzyme CTP synthase forms cytoskeletal filaments

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    Filament-forming cytoskeletal proteins are essential for the structure and organization of all cells. Bacterial homologues of the major eukaryotic cytoskeletal families have now been discovered, but studies suggest that yet more remain to be identified. We demonstrate that the metabolic enzyme CTP synthase (CtpS) forms filaments in Caulobacter crescentus. CtpS is bifunctional, as the filaments it forms regulate the curvature of C. crescentus cells independently of its catalytic function. The morphogenic role of CtpS requires its functional interaction with the intermediate filament, crescentin (CreS). Interestingly, the Escherichia coli CtpS homologue also forms filaments both in vivo and in vitro, suggesting that CtpS polymerization may be widely conserved. E. coli CtpS can replace the enzymatic and morphogenic functions of C. crescentus CtpS, indicating that C. crescentus has adapted a conserved filament-forming protein for a secondary role. These results implicate CtpS as a novel bifunctional member of the bacterial cytoskeleton and suggest that localization and polymerization may be important properties of metabolic enzymes

    The Australian Orthopaedic Association National Joint Replacement Registry

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    The document attached has been archived with permission from the editor of the Medical Journal of Australia. An external link to the publisher’s copy is included.In the financial year ending June 2002, 26 689 hip replacements and 26089 knee replacements (total, 52778) were performed in Australia. Hip and knee replacement procedures have increased between 5%-10% each year for the past 10 years, with a combined increase in hip and knee replacement of 13.4% in the past year. The revision rate for hip replacement surgery in Australia is unknown but is estimated to be 20%-24%; the revision rate for hip replacement surgery in Sweden is 7%. Although data collection for the Registry is voluntary, it has 100% compliance from hospitals undertaking joint-replacement surgery.Stephen E Graves, David Davidson, Lisa Ingerson, Philip Ryan, Elizabeth C Griffith, Brian F J McDermott, Heather J McElroy and Nicole L Prat

    Discrete and continuous time simulations of spatial ecological processes predict different final population sizes and interspecific competition outcomes

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    Cellular automata (CAs) are commonly used to simulate spatial processes in ecology. Although appropriate for modelling events that occur at discrete time points, they are also routinely used to model biological processes that take place continuously. We report on a study comparing predictions of discrete time CA models to those of their continuous time counterpart. Specifically, we investigate how the decision to model time discretely or continuously affects predictions regarding long-run population sizes, the probability of extinction and interspecific competition. We show effects on predicted ecological outcomes, finding quantitative differences in all cases and in the case of interspecific competition, additional qualitative differences in predictions regarding species dominance. Our findings demonstrate that qualitative conclusions drawn from spatial simulations can be critically dependent on the decision to model time discretely or continuously. Contrary to our expectations, simulating in continuous time did not incur a heavy computational penalty. We also raise ecological questions on the relative benefits of reproductive strategies that take place in discrete and continuous time
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