Loffredo E.,University of Bari |
Palazzo A.J.,ERDC |
Senesi N.,University of Bari |
Clapp C.E.,University of Minnesota |
Bashore T.L.,HQ ACC A3A
Soil Science | Year: 2010
Slickspot peppergrass (Lepidium papilliferum) is a biennial, or possibly perennial, endemic plant growing in the Southern Idaho high desert in visually distinct small-scale depressions in soils that collect water (so-called slickspots). Lepidium papilliferum establishes seed banks not germinating the first year but remaining dormant and viable for several years. Humic acids (HA) are universally considered to be the most important, abundant, and biologically and chemically active fractions of soil organic matter and are known to affect plant growth by various mechanisms, depending on their origin, nature, and concentration. The effects of HA in slickspot soils and how they relate to the possibility of being a factor in restoring native plants is only partially known. Thus, the objective of this study was to identify and evaluate the effects of HA isolated from three different layers within the soil profile (silt, vesicular, and clay) from inside a representative slickspot on the germination and early growth of slickspot peppergrass. Furthermore, these effects were tentatively related to the chemical, physicochemical, compositional, structural, and functional characteristics of the HA. Results of statistical analysis showed that both the type and concentration of the three HA examined exert a highly significant or significant effect on the germination and early growth of slickspot peppergrass as a function of the soil depth from which the HA originated in the slickspot. In particular, germination seemed to be enhanced, especially at higher concentrations, by the less hydrophobic HA, rich in oxygen and total sugars, present in the bottom clay soil layer, whereas root growth and shoot growth were positively influenced by the more hydrophobic and probably more polycondensed HA, rich in C, H, N, and phenolic OH present in the top layer rich in silt. Copyright © 2010 by Lippincott Williams & Wilkins.
News Article | November 7, 2016
SEATTLE, Nov. 07, 2016 (GLOBE NEWSWIRE) -- Global supercomputer leader Cray Inc. (Nasdaq:CRAY) today announced the Department of Defense (DoD) High Performance Computing Modernization Program (HPCMP) has awarded the Company with a $26 million supercomputer contract for a Cray® XC40™ supercomputer and three Cray Sonexion® storage systems. The Cray systems will be located at the U.S. Army Engineer Research and Development Center DoD Supercomputing Resource Center (ERDC DSRC) in Vicksburg, Mississippi. As the research organization of the U.S. Army Corps of Engineers, ERDC conducts R&D in support of the soldier, military installations, and civil works projects, as well as for other federal agencies, state and municipal authorities, and with U.S. industry through innovative work agreements. ERDC will use its Cray XC40 supercomputer and Cray Sonexion storage systems in support of its mission to develop innovative solutions for a safer, better world. “It is imperative that ERDC DSRC continue to accelerate technology development by providing researchers and scientists with highly-advanced supercomputing technologies,” said Bobby Hunter, Director of the ERDC DSRC. “Cray supercomputers have played a significant role in the HPCMP and the ERDC DSRC, for several decades. We are pleased that our partnership with Cray will continue in support of our vision of using advanced computational environments to solve DoD’s most critical mission challenges.” “ERDC is one of the world’s premier engineering and scientific research organizations, and we are honored to once again provide its research teams with innovative supercomputing and storage technologies through the DoD High Performance Computing Modernization Program,” said Fred Kohout, senior vice president and chief marketing officer at Cray. “Cray has enjoyed a long history with the DoD and the ERDC, and we are excited that our long-term collaboration supporting their important mission will continue.” Awarded by U.S. Army Engineering and Support Center in Huntsville, Alabama, the contract is valued at approximately $26 million in product revenue. The system is expected to be installed in mid-2017. The new system will include Intel® Xeon® E5 computing cores, as well as Intel® Xeon Phi™ processors, formerly code-named “Knights Landing”, and will be the first-ever production-ready Knights Landing system for the HPCMP. In operation for more than 20 years, the DoD HPCMP remains focused on its mission to accelerate technology development and transition into superior defense capabilities through the strategic application of high performance computing, networking and computational expertise. The HPCMP provides the people, expertise and technologies that increase the productivity of the DoD’s Research, Development, Test and Evaluation community. Cray has worked closely with the HPCMP since its inception. For more information on the Cray XC series of supercomputers and Cray Sonexion storage systems, please visit the Cray website at www.cray.com. About the DoD High Performance Computing Modernization Program The HPCMP provides Department of Defense supercomputing capabilities, high-speed network communications and computational science expertise that enable DoD scientists and engineers to conduct a wide-range of focused research, development and test activities. This partnership puts advanced technology in the hands of U.S. forces more quickly, less expensively, and with greater certainty of success. Today, the HPCMP provides a complete advanced computing environment for the DoD that includes unique expertise in software development and system design, powerful high performance computing systems, and a premier wide-area research network. The HPCMP is managed on behalf of the Department of Defense by the U.S. Army Engineer Research and Development Center. For more information, please visit the DoD HPCMP website at www.hpc.mil. About Cray Inc. Global supercomputing leader Cray Inc. (Nasdaq:CRAY) provides innovative systems and solutions enabling scientists and engineers in industry, academia and government to meet existing and future simulation and analytics challenges. Leveraging more than 40 years of experience in developing and servicing the world’s most advanced supercomputers, Cray offers a comprehensive portfolio of supercomputers and big data storage and analytics solutions delivering unrivaled performance, efficiency and scalability. Cray’s Adaptive Supercomputing vision is focused on delivering innovative next-generation products that integrate diverse processing technologies into a unified architecture, allowing customers to meet the market’s continued demand for realized performance. Go to www.cray.com for more information. Safe Harbor Statement This press release contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934 and Section 27A of the Securities Act of 1933, including, but not limited to, statements related to the timing and delivery of the system purchased by DoD HPCMP and Cray’s ability to deliver a system that meets the DoD HPCMP’s requirements. These statements involve current expectations, forecasts of future events and other statements that are not historical facts. Inaccurate assumptions and known and unknown risks and uncertainties can affect the accuracy of forward-looking statements and cause actual results to differ materially from those anticipated by these forward-looking statements. Factors that could affect actual future events or results include, but are not limited to, the risk that the system required by DoD HPCMP is not delivered in a timely fashion or does not perform as expected and such other risks as identified in the Company’s quarterly report on Form 10-Q for the quarter ended September 30, 2016, and from time to time in other reports filed by Cray with the U.S. Securities and Exchange Commission. You should not rely unduly on these forward-looking statements, which apply only as of the date of this release. Cray undertakes no duty to publicly announce or report revisions to these statements as new information becomes available that may change the Company’s expectations. Cray, the stylized CRAY mark and SONEXION are registered trademarks of Cray Inc. in the United States and other countries, and XC40 is a trademark of Cray Inc. Other product and service names mentioned herein are the trademarks of their respective owners.
Sharp M.K.,ERDC |
Seda-Sanabria Y.,USACE HQ 3E67 |
Matheu E.E.,45 Murray Lane
Applied Mechanics and Materials | Year: 2011
This paper describes collaborative research efforts conducted between the U.S. Army Corps of Engineers (USACE) and the U.S. Department of Homeland Security (DHS). The USACE, through its U.S. Army Engineer Research and Development Center (ERDC), has focused efforts on the development of a collaborative research program to address technical gaps related to risk and blast mitigation for dams. These research efforts involve experimental and analytical tasks designed to improve blast damage prediction capabilities for dams, navigation locks, and levee systems resulting from vehicle and waterborne delivery scenarios. The outcomes from these efforts can inform USACE's priorities, which include refining the current understanding of the effects of potential attacks, the vulnerabilities and weaknesses of its critical assets to various threat conditions, and the local and regional consequences of those attacks in order to develop appropriate protective measures and recovery technologies. © (2011) Trans Tech Publications.
Ranade R.,University of Michigan |
Ranade R.,Indian Institute of Technology Bombay |
Li Prof. V.C.,University of Michigan |
Stults M.D.,Tuan and Robinson Structural Engineers Inc. |
And 8 more authors.
ACI Materials Journal | Year: 2013
A new fiber-reinforced cementitious composite-high-strength, high-ductility concrete (HSHDC)-has been developed at the University of Michigan, Ann Arbor, in collaboration with the U.S. Army Engineer Research and Development Center, Vicksburg, MS. The micromechanics-based design of HSHDC resulted in a unique combination of ultra-high compressive strength (166 MPa [24 ksi]), tensile ductility (3.4%), and high specific energy absorption under direct tension (greater than 300 kJ/m3 [6270 lb-ft/ft3]). The material design approach and mechanical property characterization of HSHDC under direct tension, split tension, third-point flexure, and uniaxial compression loading, along with its density and fresh properties, are reported in this paper. Copyright © 2013, American Concrete Institute.
Military Engineer | Year: 2012
Survivability researchers from the US Army Corps of Engineers Engineering Research and Development Center (ERDC) were continuously developing and improving protective technologies with the goal of saving valuable lives of soldiers engaged in military operations. A live-fire demonstration was held at Fort Polk, La., to test rapidly deployable protective structures for deployed troops, focusing specifically on small Combat Outposts (COP) of 300 or fewer personnel. Researchers expected to increase protection without increasing the logistics or equipment necessary to deploy the protection. Specific technologies tested included variations of the Modular Protective System, a combination of a lightweight space frame and composite armor panels that was used to construct perimeter walls, tactical operations centers, elevated guard towers and a protected mortar pit, and its corresponding overhead cover.
Fowler A.,RIEGL LMS |
GIM International | Year: 2013
A team of scientists recently completed a research visit to Helheim Glacier in Southeast Greenland. The purpose of their research was to characterize the behavior of the glacier using the latest technology in round-based remote sensing, a long-range Terrestrial Laser Scanner (TLS). Retreat, acceleration and thinning of tidewater outlet glaciers around the margins of the Greenland Ice Sheet have continually been observed over the last two decades. On previous trips to Helheim Glacier, they have performed precarious on-ice high-resolution GNSS surveys, and installed climate stations and time-lapse cameras to capture multi-temporal images of the glacier's behavior. Along with these visual and spatial glimpses into the workings of the glacier, researcher David Finnegan from CRREL has previously utilized TLS in an attempt to determine flow velocities at numerous glaciers around the world, albeit with limited success.
Downs D.,Mississippi State University |
Comer T.,Mississippi State University |
Archibald C.,Mississippi State University |
Bethel C.,Mississippi State University |
And 2 more authors.
SAE Technical Papers | Year: 2016
The ability to quickly and automatically evaluate vehicle designs is a critical tool in an efficient vehicle design process. This paper presents techniques for vehicle parameter estimation using automatic intelligent simulations. These techniques enable the efficient and automatic evaluation of many important aspects of vehicle designs. The effectiveness of this approach is demonstrated by using vehicle tests that are commonly performed on military ground vehicles. Our simulation techniques are able to determine the relevant vehicle performance characteristics in a much more efficient manner than could be done previously. This is done automatically, once the user has specified the type of test to be performed. A terrain sample is automatically generated and the vehicle's behavior on each terrain instance is evaluated until the specified test conditions are met. A search algorithm determines which terrain to generate at each iteration, and the effectiveness of two different search algorithms are investigated for this purpose. Simulation also allows for efficient measurement of new performance characteristics that are impractical to measure in the real world. The described techniques have been implemented as part of a software plugin for the ANVEL simulation environment. This plugin gives the ability to easily obtain vehicle performance metrics that reflect the design's performance over a wide range of possible physical environments. Using this framework users can easily implement whichever new tests they are interested in performing. This framework will be made freely available so that other designers can obtain vehicle evaluations in a timely manner and with minimal user interaction. © Copyright 2016 SAE International.