Maffei Andrew R.

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Maffei
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Andrew R.
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  • Technical Report
    Acoustic and oceanographic observations and configuration information for the WHOI moorings from the SW06 experiment
    (Woods Hole Oceanographic Institution, 2007-05) Newhall, Arthur E. ; Duda, Timothy F. ; von der Heydt, Keith ; Irish, James D. ; Kemp, John N. ; Lerner, Steven A. ; Liberatore, Stephen P. ; Lin, Ying-Tsong ; Lynch, James F. ; Maffei, Andrew R. ; Morozov, Andrey K. ; Shmelev, Alexey A. ; Sellers, Cynthia J. ; Witzell, Warren E.
    This document describes data, sensors, and other useful information pertaining to the moorings that were deployed from the R/V Knorr from July 24th to August 4th, 2006 in support of the SW06 experiment. The SW06 experiment was a large, multi-disciplinary effort performed 100 miles east of the New Jersey coast. A total of 62 acoustic and oceanographic moorings were deployed and recovered. The moorings were deployed in a “T” geometry to create an along-shelf path along the 80 meter isobath and an across-shelf path starting at 600 meters depth and going shoreward to a depth of 60 meters. A cluster of moorings was placed at the intersection of the two paths to create a dense sensor-populated area to measure a 3-dimensional physical oceanography. Environmental moorings were deployed along both along-shelf and across-shelf paths to measure the physical oceanography along those paths. Moorings with acoustic sources were placed at the outer ends of the “T” to propagate various signals along these paths. Five single hydrophone receivers were positioned on the across shelf path and a vertical and horizontal hydrophone array was positioned at the intersection of the “T” to get receptions from all the acoustics assets that were used during SW06.
  • Article
    An authoritative global database for active submarine hydrothermal vent fields
    (John Wiley & Sons, 2013-11-19) Beaulieu, Stace E. ; Baker, Edward T. ; German, Christopher R. ; Maffei, Andrew R.
    The InterRidge Vents Database is available online as the authoritative reference for locations of active submarine hydrothermal vent fields. Here we describe the revision of the database to an open source content management system and conduct a meta-analysis of the global distribution of known active vent fields. The number of known active vent fields has almost doubled in the past decade (521 as of year 2009), with about half visually confirmed and others inferred active from physical and chemical clues. Although previously known mainly from mid-ocean ridges (MORs), active vent fields at MORs now comprise only half of the total known, with about a quarter each now known at volcanic arcs and back-arc spreading centers. Discoveries in arc and back-arc settings resulted in an increase in known vent fields within exclusive economic zones, consequently reducing the proportion known in high seas to one third. The increase in known vent fields reflects a number of factors, including increased national and commercial interests in seafloor hydrothermal deposits as mineral resources. The purpose of the database now extends beyond academic research and education and into marine policy and management, with at least 18% of known vent fields in areas granted or pending applications for mineral prospecting and 8% in marine protected areas.
  • Article
    Shallow Water ’06 : a joint acoustic propagation/nonlinear internal wave physics experiment
    (Oceanography Society, 2007-12) Tang, Dajun ; Moum, James N. ; Lynch, James F. ; Abbot, Philip A. ; Chapman, Ross ; Dahl, Peter H. ; Duda, Timothy F. ; Gawarkiewicz, Glen G. ; Glenn, Scott M. ; Goff, John A. ; Graber, Hans C. ; Kemp, John N. ; Maffei, Andrew R. ; Nash, Jonathan D. ; Newhall, Arthur E.
    Since the end of the Cold War, the US Navy has had an increasing interest in continental shelves and slopes as operational areas. To work in such areas requires a good understanding of ocean acoustics, coastal physical oceanography, and, in the modern era, autonomous underwater vehicle (AUV) operations.
  • Technical Report
    The Jason II virtual control van system, data acquisition system, web-based event logger, and SeaNet
    (Woods Hole Oceanographic Institution, 2002-12) Lerner, Steven A. ; Maffei, Andrew R.
    Scientific underwater remotely operated vehicles (ROVs) collect data from multiple video cameras and scientific instruments. This integrated information is often only available in an ROV control-van during operations. Although all the data is logged, it is difficult for scientists to re-create a combined display of this data and have the ability to review and access an entire cruise dataset easily. We introduce a methodology of taking continuous real-time information snapshots (infosnaps) during interesting events and at regular time intervals for complete data coverage. These infosnaps capture four simultaneous video sources, vehicle data, instrument data, and event data as entered by scientists. The infosnaps are automatically cataloged and immediately accessible and searchable via a web-browser. We developed, built, and deployed the Jason II Virtual Control Van system on seven Jason cruises. The system has captured over 50,000 control-van infosnaps, containing more than 200,000 images co-registered with vehicle telemetry and scientific instrument data. The Virtual Control Van is designed for both scientific collaboration and public/educational outreach. It has been integrated with the SeaNet system to provide remote on-shore access. The report describes the Jason II Virtual Control Van system and includes instructions for setting up the system in the field.
  • Preprint
    Toward cyberinfrastructure to facilitate collaboration and reproducibility for marine integrated ecosystem assessments
    ( 2016-10-20) Beaulieu, Stace E. ; Fox, Peter A. ; Di Stefano, Massimo ; Maffei, Andrew R. ; West, Patrick ; Hare, Jonathan A. ; Fogarty, Michael J.
    There is a growing need for cyberinfrastructure to support science-based decision making in management of natural resources. In particular, our motivation was to aid the development of cyberinfrastructure for Integrated Ecosystem Assessments (IEAs) for marine ecosystems. The IEA process involves analysis of natural and socio-economic information based on diverse and disparate sources of data, requiring collaboration among scientists of many disciplines and communication with other stakeholders. Here we describe our bottom-up approach to developing cyberinfrastructure through a collaborative process engaging a small group of domain and computer scientists and software engineers. We report on a use case evaluated for an Ecosystem Status Report, a multi-disciplinary report inclusive of Earth, life, and social sciences, for the Northeast U.S. Continental Shelf Large Marine Ecosystem. Ultimately, we focused on sharing workflows as a component of the cyberinfrastructure to facilitate collaboration and reproducibility. We developed and deployed a software environment to generate a portion of the Report, retaining traceability of derived datasets including indicators of climate forcing, physical pressures, and ecosystem states. Our solution for sharing workflows and delivering reproducible documents includes IPython (now Jupyter) Notebooks. We describe technical and social challenges that we encountered in the use case and the importance of training to aid the adoption of best practices and new technologies by domain scientists. We consider the larger challenges for developing end-to-end cyberinfrastructure that engages other participants and stakeholders in the IEA process.
  • Technical Report
    4DGeoBrowser : a web-based data browser and server for accessing and analyzing multi-disciplinary data
    (Woods Hole Oceanographic Institution, 2001-10) Lerner, Steven A. ; Maffei, Andrew R.
    This report describes the 4DGeoBrowser software system. The GeoBrowser is a web-based application developed at the Woods Hole Oceanographic Institution by Steven Lerner and Andrew Maffei. It has been designed with the goal of creating, accessing, and analyzing repositories of oceanographic datasets that have been generated by investigators in differing scientific disciplines. Once the information is loaded onto a Geobrowser server the investigator-user is able to login to the website and use a set of data access and analysis tools to search, plot, and display this information. GeoBrowser servers are also capable of processing commands that are submitted remotely via HTTP URLs or email. Scientists are able to use this capability to make calls to the GeoBrowser server and generate click-able maps, tables of urls, and customized HTML pages. These can then be used to enhance websites associated with scientific projects. Examples of supporting scientific website functionality that includes time series plotting, data delivery by email, geo-spatial plotting of interdisciplinary data, map-based search capabilities and other functionality are presented in this report. The report includes examples of GeoBrowser application websites, a user manual, and a reference guide. In addition, the concept of Electronic Index Cards (EICs) is presented.