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Petroleum engineers continue to need cost saving and environmentally sustainable products and methods for today's hydraulic fracturing operations. Hydraulic Fracturing Chemicals and Fluid Technology, Second Edition, continues to deliver an easy-to-use manual of fluid formulations to meet specific job needs. Enhanced with more environmental aspects, this reference helps engineers and fluid specialists select and use the appropriate chemicals for any hydraulic fracturing job. New information concerning nanotechnology applications such as wellbore sealant and proppants are added to enhance operations in a sustainable manner while saving on production costs. Other updates include low recovery of fracturing water in shale, surfactants for waterless hydraulic fracturing, and expanded produced water treatment. Rounding out with updated references and patents for easy reference, Hydraulic Fracturing Chemicals and Fluid Technology, Second Edition, gives engineers a critical guide on selecting better products to boost productions while strengthening environmental enhancement and consideration.
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Fieldworkers’ notebooks are full of sensations and observations in which the subjectivity of the ethnographer seeps through. Not really science. Much closer to life. Yet in classical anthropology they are invisible to the reader. In this book the focus is reversed, turning Anthropology Inside Out as it explores the vibrant backstage life of field notes. What happens when we put them centre stage?Aimed at both curious novice and experienced practitioner, the chapters read as a catalogue of experimental practices teetering on the edge of the tradition: intuitively observational drawings; notes pervaded with paranoia; collective notetaking; crisis-ridden personal confessions; layers of notes in photographs and archives; old flip-flops that trigger memories in mind and body. This exploration of what field notes are, can do and could be, concludes with a constellation of shimmering notes on notes from Michael Taussig, a meta-commentary on anthropologists’ fetishistic relationship with the most personal of professional tools.
fieldwork --- field notes --- methodology
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Symptoms of important diseases have been illustrated with colored photographs which will help in their correct and easy diagnosis..
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Geomagnetism. --- Earth magnetic field --- Geomagnetic field --- Magnetism, Terrestrial --- Terrestrial magnetic field --- Terrestrial magnetism --- Geophysics --- Magnetism
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Donations to charity are widely encouraged by policymakers through targeted tax incentives such as tax credits for contributions only to qualifying causes. We use a framed field experiment to test how the largest such program, Arizona's state income tax credit for donations to qualifying charities, affects donation decisions in a modified dictator game. In the experiment, we randomize whether subjects receive detailed information about the tax credit program prior to selecting potential recipients and completing the allocation task. We also vary the number of charities that subjects can select as recipients along with the (tax-credit) qualifying vs. non-qualifying composition of the choice set. We find that average giving is unaffected by the information provision and composition of the choice set. However, subjects direct significantly more funds towards qualifying charities when provided information about the tax program; an effect that is enhanced when subjects select multiple recipients from lists that contain a mixture of qualifying and non-qualifying organizations. Our results underline the importance of including a portfolio of choices when studying the impact of targeted incentives because this makes it possible to identify a central feature of our data: participants "rob Peter" (non-qualifying charities) "to pay Paul" (qualifying charities).
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Field programmable gate arrays. --- Programmable array logic.
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