Hadoop: The Definitive Guide

Author: Tom White

Publisher: "O'Reilly Media, Inc."

ISBN: 1449396895

Category: Computers

Page: 628

View: 5977

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Discover how Apache Hadoop can unleash the power of your data. This comprehensive resource shows you how to build and maintain reliable, scalable, distributed systems with the Hadoop framework -- an open source implementation of MapReduce, the algorithm on which Google built its empire. Programmers will find details for analyzing datasets of any size, and administrators will learn how to set up and run Hadoop clusters. This revised edition covers recent changes to Hadoop, including new features such as Hive, Sqoop, and Avro. It also provides illuminating case studies that illustrate how Hadoop is used to solve specific problems. Looking to get the most out of your data? This is your book. Use the Hadoop Distributed File System (HDFS) for storing large datasets, then run distributed computations over those datasets with MapReduce Become familiar with Hadoop’s data and I/O building blocks for compression, data integrity, serialization, and persistence Discover common pitfalls and advanced features for writing real-world MapReduce programs Design, build, and administer a dedicated Hadoop cluster, or run Hadoop in the cloud Use Pig, a high-level query language for large-scale data processing Analyze datasets with Hive, Hadoop’s data warehousing system Take advantage of HBase, Hadoop’s database for structured and semi-structured data Learn ZooKeeper, a toolkit of coordination primitives for building distributed systems "Now you have the opportunity to learn about Hadoop from a master -- not only of the technology, but also of common sense and plain talk." --Doug Cutting, Cloudera
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Stream Instability, Bridge Scour, and Countermeasures: A Field Guide for Bridge Inspectors

Author: Transportation Dept., Federal Highway Administration

Publisher: Government Printing Office

ISBN: 9780160876127

Category: Technology & Engineering

Page: 47

View: 3806

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FHWA Publication No. FHWA-NHI-08-0106. February 2009. Explains the behavior of rivers in order to recognize changing conditions associated with unstable streams or scour at bridge foundations that may threaten the stability of the bridge. Provides tips and guidance on what to look for with regard to both stream instability, including lateral instability, degradation, and aggradation, and scour at bridges, including contraction scour, pier scour, and abutment scour. Also covered are plans of action and countermeasures, such as monitoring, flood watches, bridge closures, and river training countermeasures.
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Stream Hydrology

An Introduction for Ecologists

Author: Nancy D. Gordon,Brian L. Finlayson,Thomas A. McMahon

Publisher: John Wiley and Sons

ISBN: 9780470843574

Category: Science

Page: 429

View: 5267

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Since the publication of the first edition (1994) there have been rapid developments in the application of hydrology, geomorphology and ecology to stream management. In particular, growth has occurred in the areas of stream rehabilitation and the evaluation of environmental flow needs. The concept of stream health has been adopted as a way of assessing stream resources and setting management goals. Stream Hydrology: An Introduction for Ecologists Second Edition documents recent research and practice in these areas. Chapters provide information on sampling, field techniques, stream analysis, the hydrodynamics of moving water, channel form, sediment transport and commonly used statistical methods such as flow duration and flood frequency analysis. Methods are presented from engineering hydrology, fluvial geomorphology and hydraulics with examples of their biological implications. This book demonstrates how these fields are linked and utilised in modern, scientific river management. Emphasis on applications, from collecting and analysing field measurements to using data and tools in stream management. Updated to include new sections on environmental flows, rehabilitation, measuring stream health and stream classification. Critical reviews of the successes and failures of implementation. Revised and updated windows-based AQUAPAK software. This book is essential reading for 2nd/3rd year undergraduates and postgraduates of hydrology, stream ecology and fisheries science in Departments of Physical Geography, Biology, Environmental Science, Landscape Ecology, Environmental Engineering and Limnology. It would be valuable reading for professionals working in stream ecology, fisheries science and habitat management, environmental consultants and engineers.
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Fields and Streams

Stream Restoration, Neoliberalism, and the Future of Environmental Science

Author: Rebecca Lave

Publisher: University of Georgia Press

ISBN: 0820343927

Category: Social Science

Page: 184

View: 4229

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Examining the science of stream restoration, Rebecca Lave argues that the neoliberal emphasis on the privatization and commercialization of knowledge has fundamentally changed the way that science is funded, organized, and viewed in the United States. Stream restoration science and practice is in a startling state. The most widely respected expert in the field, Dave Rosgen, is a private consultant with relatively little formal scientific training. Since the mid-1990s, many academic and federal agency-based scientists have denounced Rosgen as a charlatan and a hack. Despite this, Rosgen's Natural Channel Design approach, classification system, and short-course series are not only accepted but are viewed as more legitimate than academically produced knowledge and training. Rosgen's methods are now promoted by federal agencies including the Environmental Protection Agency, the U.S. Forest Service, the U.S. Fish and Wildlife Service, and the Natural Resources Conservation Service, as well as by resource agencies in dozens of states. Drawing on the work of Pierre Bourdieu, Lave demonstrates that the primary cause of Rosgen's success is neither the method nor the man but is instead the assignment of a new legitimacy to scientific claims developed outside the academy, concurrent with academic scientists' decreasing ability to defend their turf. What is at stake in the Rosgen wars, argues Lave, is not just the ecological health of our rivers and streams but the very future of environmental science.
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Integration of Computer Modeling and Field Observations in Geomorphology

Binghamton Geomorphology Symposium 2000

Author: John F. Shroder,Michael P. Bishop

Publisher: Gulf Professional Publishing

ISBN: 9780444515322

Category: Science

Page: 196

View: 8906

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The integration of classic field-gathered data with new computer models has allowed many new advances in geomorphology, which the 31st Binghamton Millennium Symposium 2000 presents in this latest of the well-known Binghamton book series, the Integration of Computer Modeling and Field Observations in Geomorphology. Conceptual models have been most commonly inferred from analyses of topography and investigator perspectives derived from fieldwork. The main stumbling blocks to understanding surface processes, their interactions, temporal changes, and resulting landforms are the difficulty of observation, geological timescales involved, spatial-scale dependencies, and the inability to attribute differences to either process or age. Physically based computer models have thus become essential tools, primarily because of their ability to explore spatial and temporal trends and to determine the sensitivity of physical inputs to change without the difficulties of identification and generalization associated with the complexity of field studies. Thus, the combination of both methods, or the integration of field methods with computer modeling become a very powerful mechanism for robust understanding. This new book presents topics on fluvial processes of overland and channelized flow in arid, humid, and periglacial areas of high and low relief, as well as work on interlinked biogeographic and geomorphic fluctuations in alpine terrain, and ground penetrating radar of coastal geomorphology. Issues of long-term evolution of drainage networks are addressed in natural systems, as well as stream-table environments, and terrain analyses characterize surficial and subsurface geomorphic features by using GIS and remote sensing. Botanical and biogeomorphologic controls of landforms are assessed, along with issues of scientific visualization, cartographic representation, DEMs, spatial analyses, and scale dependencies.
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