3,758 research outputs found

    Nearest neighbor - A new non-parametric test used for classifying spectral data

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    Nonparametric statistical interference program for spectral data classificatio

    Alien Registration- Nadeau, Adelard J. (Lewiston, Androscoggin County)

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    https://digitalmaine.com/alien_docs/27590/thumbnail.jp

    Alien Registration- Nadeau, Ernest J. (Orono, Penobscot County)

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    https://digitalmaine.com/alien_docs/5903/thumbnail.jp

    Articulating Concrete Blocks: The Long and Winding Road

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    This paper will provide an overview of Articulating Concrete Blocks (ACB’s) from three perspectives: 1. the Manufacturer, 2. The Engineer and 3. The Researcher and how these independent entities interact with each other and the regulatory community to further the scientific understanding and use of ACB systems. ACB’s, since their development in the late 1970’s, represent a growing choice of design engineers in economically solving their critical erosion prevention problems as well as a variety of other non-hydraulic applications. Typical applications of ACB’s are found in protecting channels and canals, dam spillways and embankments, bridge piers and abutments, river bank stabilization projects, boat ramps and wet stream crossings. The ACB manufacturers work closely with both the ACB design engineer, dam safety and environmental regulators and ACB researchers. Design challenges faced by the engineering and regulatory communities include but are not limited to non-linear flow paths, converging flows and hydraulic jump in their efforts to provide a robust and economical solution for their clients. The research community in working with the manufacturers have developed much data and insight into ACB performance and limitations since standardized testing started in the mid 1980’s, however each manufacturer “owns” this information and is reluctant to share with other manufacturer’s. Recent testing extending the length of the ACB revetment being tested has shown the consistent development of aerated flows which need to be further researched along with the hydraulic jump testing including analysis protocols being developed and converging non-linear flow scenarios

    Lessons learned from articulating concrete block (ACB) field installations

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    Presented at the Protections 2016: 2nd international seminar on dam protection against overtopping: concrete dams, embankment dams, levees, tailings dams held on 7th-9th September, 2016, at Colorado State University in Fort Collins, Colorado, USA. The increasing demand for dam and levee safety and flood protection has motivated new research and advancements and a greater need for cost-effective measures in overtopping protection as a solution for overtopping concerns at levees and dams. This seminar will bring together leading experts from practice, research, development, and implementation for two days of knowledge exchange followed by a technical tour of the Colorado State University Hydraulic Laboratory with overtopping flume and wave simulator. This seminar will focus on: Critical issues related to levees and dams; New developments and advanced tools; Overtopping protection systems; System design and performance; Applications and innovative solutions; Case histories of overtopping events; Physical modeling techniques and recent studies; and Numerical modeling methods.Includes bibliographical references.Articulating Concrete Blocks (ACBs) have been a popular choice for high performance erosion control applications and shoreline revetments for well over 35 years and continue to grow in popularity. Estimates point to over 200 dam embankments and emergency spillways having been armored with ACBs in the past 30 years. As a result of these applications, as well as the thousands of other projects not specific to dams, much has been learned from a theoretical as well as practical application standpoint of properly utilizing ACBs in the field. This presentation will provide information concerning ACB Factor of Safety (FOS) determination, briefly review the ACB testing protocols and data analysis, and discuss the practical uses and limitations of ACB applications. New installation techniques that show promise for improving ACB performance will be discussed. ACBs are a proven cost effective erosion countermeasure, however experience and attention to detail during the design and installation of systems is of paramount importance for expected performance

    In-Suit Doppler Technology Assessment

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    The objective of this program was to perform a technology assessment survey of non-invasive air embolism detection utilizing Doppler ultrasound methodologies. The primary application of this technology will be a continuous monitor for astronauts while performing extravehicular activities (EVA's). The technology assessment was to include: (1) development of a full understanding of all relevant background research; and (2) a survey of the medical ultrasound marketplace for expertise, information, and technical capability relevant to this development. Upon completion of the assessment, LSR was to provide an overview of technological approaches and R&D/manufacturing organizations

    A Computational Method for the Rate Estimation of Evolutionary Transpositions

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    Genome rearrangements are evolutionary events that shuffle genomic architectures. Most frequent genome rearrangements are reversals, translocations, fusions, and fissions. While there are some more complex genome rearrangements such as transpositions, they are rarely observed and believed to constitute only a small fraction of genome rearrangements happening in the course of evolution. The analysis of transpositions is further obfuscated by intractability of the underlying computational problems. We propose a computational method for estimating the rate of transpositions in evolutionary scenarios between genomes. We applied our method to a set of mammalian genomes and estimated the transpositions rate in mammalian evolution to be around 0.26.Comment: Proceedings of the 3rd International Work-Conference on Bioinformatics and Biomedical Engineering (IWBBIO), 2015. (to appear

    Predictability of repeating earthquakes near Parkfield, California

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    We analyse sequences of repeating microearthquakes that were identified by applying waveform coherency methods to data from the Parkfield High-Resolution Seismic Network. Because by definition all events in a sequence have similar magnitudes and locations, the temporal behaviour of these sequences is naturally isolated, which, coupled with the high occurrence rates of small events, makes these data ideal for studying interevent time distributions. To characterize the temporal predictability of these sequences, we perform retrospective forecast experiments using hundreds of earthquakes. We apply three variants of a simple algorithm that produces sequence-specific, time-varying hazard functions, and we find that the sequences are predictable. We discuss limitations of these data and, more generally, challenges in identifying repeating events, and we outline the potential implications of our results for understanding the occurrence of large earthquake
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