402,579 research outputs found

    Long-term Global Agricultural Output Supply-Demand Balance and Real Farm and Food Prices

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    Global food demand is estimated from population projections of the United Nations and food supply is projected from Food and Agriculture Organization yield data to quantify the global food supply-demand balance for 2025 and 2050. The eight food categories examined account for 95 percent of global food consumption. Results indicate that the historic era of secularly falling real food prices is over. The real price of corn, for example, is not expected to fall over the next four decades at the annual rate of 1.3 percent that it fell annually from 1960 to 2006. The analysis foresees future real food prices fluctuating around a flat or rising trend. Slowed national economic growth from flat or rising real food prices may be little more than an irritant for consumers in affluent countries, but will entail severe hardship for consumers in the many countries currently troubled by poverty and hunger. Opportunities exist to expand food output by adding cropland in Brazil and irrigation in Africa, for example, but in the long term such developments will be offset by cropland removed from production by urban and industrial development, soil degradation, and the like. Although cropland can be expanded through higher real farm and food prices, higher yields rather than added cropland offer the most attractive opportunities for farm output expansion at low cost to consumers and the environment. The slowing rate of increase in crop and livestock yields corresponds with a slowing rate of increase in public and in private agricultural research and development spending. The world will not have the luxury of curtailing spending on agricultural technology and rejecting promising technologies such as genetically modified organisms (GMOs) if is to keep real food costs from rising. Productive new cropland, irrigation, genetically modified varieties, and other technologies will be hard pressed indeed to match the massive historic gains from hybrid varieties, irrigation, synthetic fertilizers, and mechanization. On the demand side, subsidies to expand demand for farming resources such as biofuels will need revisiting if rising food costs are to be contained.World Food Supply-Demand, Food Prices, Agricultural Markets, Crop and Livestock Yields, Agricultural and Food Policy, Demand and Price Analysis, International Development, Q11, Q18,

    On the Stability of Region Count in the Parameter Space of Image Analysis Methods

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    In this dissertation a novel bottom-up computer vision approach is proposed. This approach is based upon quantifying the stability of the number of regions or count in a multi-dimensional parameter scale-space. The stability analysis comes from the properties of flat areas in the region count space generated through bottom-up algorithms of thresholding and region growing, hysteresis thresholding, variance-based region growing. The parameters used can be threshold, region growth, intensity statistics and other low-level parameters. The advantages and disadvantages of top-down, bottom-up and hybrid computational models are discussed. The approaches of scale-space, perceptual organization and clustering methods in computer vision are also analyzed, and the difference between our approach and these approaches is clarified. An overview of our stable count idea and implementation of three algorithms derived from this idea are presented. The algorithms are applied to real-world images as well as simulated signals. We have developed three experiments based upon our framework of stable region count. The experiments are using flower detector, peak detector and retinal image lesion detector respectively to process images and signals. The results from these experiments all suggest that our computer vision framework can solve different image and signal problems and provide satisfactory solutions. In the end future research directions and improvements are proposed

    Evaluation of Biocomposite for Implementation as Prosthetic Socket

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    According to the World Health Organization, 0.5% of the population in developing countries is in need of prostheses or orthoses. For this population, obtaining a prosthetic is made difficult due to medical and transportation costs as well as a general lack of area resources. One possible solution to these problems would be to design a prosthetic socket from an inexpensive biodegradable material that could be produced in developing countries. One such material has been developed by Ecovative Design, LLC. Ecovative’s technology grows mycelium, mushroom roots, throughout a plant fiber matrix. Ecovative products are completely biodegradable and made naturally from local agricultural byproducts allowing it to be produced anywhere in the world. The objective of this project is to test material properties of Ecovative flat stock samples to analyze the material’s applicability as a prosthetic socket for developing countries. Properties evaluated include specific gravity, water absorption, coefficient of linear thermal expansion (CLTE), and hardness. The average specific gravity of the samples ranged from 0.1036 to 0.1440; the average water absorption ranged from 298.70 to 350.48%; the average CLTE ranged from -17.42 to -2.99 x 10-5/℃; the top hardness ranged from 30.47 to 37.63 N; the bottom hardness ranged from 17.49 to 38.70 N. From this data, it was determined that the Ecovative samples tested have potential to be used in prosthetic sockets if it can be redesigned to lower the water absorption. A hydrophilic coating would be one of the recommendations to decrease the water absorption. Future research should include further evaluation of a hydrophobic coating for the Ecovative materials, complete characterization of the material as well as implementation within floatation devices, safety mats, and arch support shoe inserts

    Knowledge Collaboration: Working with Data and Web Specialists

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    When resources are finite, people strive to manage resources jointly (if they do not rudely take possession of them). Organizing helps achieve—and even amplify—common purpose but often succumbs in time to organizational silos, teaming for the sake of teaming, and the obstacle course of organizational learning. The result is that organizations, be they in the form of hierarchies, markets, or networks (or, gradually more, hybrids of these), fail to create the right value for the right people at the right time. In the 21st century, most organizations are in any event lopsided and should be redesigned to serve a harmonious mix of economic, human, and social functions. In libraries as elsewhere, the three Ss of Strategy—Structure—Systems must give way to the three Ps of Purpose—Processes—People. Thence, with entrepreneurship and knowledge behaviors, data and web specialists can synergize in mutually supportive relationships of shared destiny

    The japanese technology system

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    L'obiettivo del seminario è stato quello di approfondire un tema di grande attualità quale è quello dei percorsi di sviluppo tecnologico seguiti dal sistema industriale giapponese; percorsi che hanno consentito a questo Paese di raggiungere in pochi lustri la leadership mondiale in termini di qualità e costi per molte produzioni/servizi

    Globalization and the Flattening of the World: A Book Review of “The World is Flat”

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    There is no doubt the world is changing. In cultures, in politics, and in economies, increased awareness of foreign and domestic practices has become a focal point of society. Trade has always proven beneficial to a nation due to the laws of absolute and comparative advantage, but in the modern world, international relations go beyond the boundaries of exchanging products. Now, services and collaboration are added to that realm. In his book “The World is Flat,” Thomas Friedman pinpoints the history and future of globalization in economics. Highlighting how globalization has made the world “flat” by allowing fair competition between large and small companies, corporations and individuals, and countries and continents, Friedman gives insight into how the world has changed because of innovation and history colliding at the right time

    A Compensatory Liability Regime to Promote the Exchange of Microbial Genetic Resources for Research and Benefit Sharing

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    Female rhesus macaques were immunized with HIV virus-like particles (HIV-VLPs) or HIV DNA administered as sequential combinations of mucosal (intranasal) and systemic (intramuscular) routes, according to homologous or heterologous prime-boost schedules. The results show that in rhesus macaques only the sequential intranasal and intramuscular administration of HIV-VLPs, and not the intranasal alone, is able to elicit humoral immune response at the systemic as well as the vaginal level.funding agencies|Simian Vaccine Evaluation Unit (SVEU) of the Division of AIDS||European Community|201433|</p
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