News Article | November 17, 2016
PATUXENT RIVER, MD--(Marketwired - November 17, 2016) - The Naval Air Systems Command (NAVAIR) Aircraft Division, Patuxent River (also referred to as the Naval Air Warfare Center Aircraft Division (NAWCAD)) released on Thursday, November 17 a presolicitation for Polycom and Cisco brand-name Video Teleconferencing (VTC) hardware and ancillary equipment pursuant to FAR 6.302-1(c). The NAWCAD also requires a contractor to install and integrate services, and then maintain/ support services to facilitate technology lifecycle management. Services shall include support of previously purchased VTC/ ancillary equipment currently in use at the Naval Air Systems Command (NAVAIR) offices throughout the United States and its territories as well as new materials purchased on this new contract vehicle. This includes, but is not limited to, the following core sites: Lakehurst, NJ; China Lake, CA; Point Mugu, CA; Orlando, FL; Jacksonville, FL; Cherry Point, NC; and North Island, CA. The contract will be a Firm Fixed Price (FFP), 5- year Indefinite Delivery Indefinite Quantity (IDIQ) contract which will consist of a base and four option years. This is a Section 8(a) small business competition for Federal Supply Code (FSC) 7050- ADP Components under North American Industry Classification System (NAICS) code 541519. Eligibility to participate is not restricted to firms in either the developmental stage or the developmental and transitional stages. Contractors interested in this opportunity are invited to submit questions to Contracting Officer Kristin Nelson via e-mail at Kristin.email@example.com. Questions are due by no later than November 24, 2016, and responses are due by no later than December 19, 2016 at 5 p.m. EST. The period of performance will begin on July 1, 2017. To receive the contract, contractors must be registered with the System for Award Management (SAM) database, and have as part of the Registration all current Representations and Certifications. US Federal Contractor Registration, the world's largest third-party government registration firm, completes the required Registrations on behalf of its clients. It also makes available information about opportunities like this, as well as training on how to locate, research, and respond to opportunities. For more information, to get started with a SAM registration, or to learn more about how US Federal Contractor Registration can help your business succeed, call 877-252-2700, ext. 1.
News Article | September 20, 2016
« GENIVI Alliance launches new open source vehicle simulator project | Main | Univ. Houston, Caltech team develops new earth-abundant, cost-effective catalyst for water-splitting » The US Navy has completed flight testing of a 100% advanced biofuel in the EA-18G “Green Growler” at Naval Air Station Patuxent River, Maryland. The US Navy is a leader in incorporating alternative fuel into operational supplies, in order to increase mission capability and flexibility. The catalytic hydrothermal conversion-to-jet (CHCJ) process 100% alternative fuel performed as expected during a ground test 30 August at NAWCAD’s Aircraft Test and Evaluation Facility (ATEF), followed by the first test flight 1 September, said Rick Kamin, energy and fuels lead for Naval Air Systems Command (NAVAIR). Kamin also leads the alternative fuel test and qualification program for the Navy. CHCJ-5, the 100% drop-in renewable jet fuel tested, is produced by Florida-based Applied Research Associates (ARA) and Chevron Lummus Global. (Earlier post.) ARA’s process uses the same feedstocks as the Hydroprocessed Esters and Fatty Acids (HEFA) 50% advanced biofuel blend previously approved by the Navy, but uses a unique conversion process that provides a fully synthetic fuel that does not need to be blended, Kamin said. The fuel contains high-density aromatic, cycloparaffin, and isoparaffin hydrocarbons. ARA and Chevron Lummus Global (CLG) developed the Biofuels ISOCONVERSION (BIC) process based on ARA’s patented, novel Catalytic Hydrothermolysis (CH) process and CLG’s hydroprocessing technology. CHCJ-5 was developed as a variation of the commercial ReadiJet with the intention to meet the Navy’s JP-5 jet fuel spec and qualification protocols. The fuels team has evaluated five alternative sources for JP-5 and four F-76 sources since SECNAV kicked-off the program in 2009. The team, however, was already researching advanced biofuels in response to interest from the US Air Force and the commercial airline industry in 2008. From takeoff to landing, you couldn't tell any difference. The information presented to us in the airplane is pretty simplified but, as far as I could tell, the aircraft flew completely the same as [petroleum-based] JP-5 for the whole flight. —Lt. Cmdr. Bradley Fairfax, project officer and test pilot with Air Test and Evaluation Squadron (VX) 23, after the first test flight 1 September Using the Naval Air Warfare Center Aircraft Division’s (NAWCAD) Real-time Telemetry Processing System (RTPS) at the Atlantic Test Ranges, flight test engineer Mary Picard monitored the ground and test flights and confirmed Fairfax's observations. That’s the technical premise of the Navy’s alternative fuels test and qualification program: the JP-5 produced from alternative sources must be invisible to the user, said Rick Kamin, energy and fuels lead for Naval Air Systems Command (NAVAIR). The fuels program supports SECNAV’s operational energy goal to increase the use of alternative fuels afloat by 2020. The Navy fuels team is collaborating with commercial activities such as the American Society for Testing and Materials (ASTM), the owner of commercial fuel specifications and the Commercial Aviation Alternative Fuels Initiative (CAAFI), which seeks to enhance energy security and environmental sustainability for aviation through jet fuel produced from alternatives to petroleum, Kamin said.
News Article | November 16, 2016
The Federal Government Distance Learning Association (FGDLA) announced the 20th Annual FGDLA Award honorees. The awards recognize excellence in federal government distance learning and selected 16 organizations and professionals. The FGDLA Awards are co-located at the Government Learning Technology Symposium, December 7-8, 2016 at the Washington, D.C. Convention Center. “This is FGDLA 20th year for proudly recognizing individuals and organizations who have made major contributions to enhancing distance learning within the Federal Government,” says Alex Autry, President, Federal Government Distance Learning Association. "Not only have these recipients’ improved the knowledge and skill levels of our number one resources- people- but have ensured our Nation is second to none.” FGDLA is honored to name the following Federal Government employees and organizations for demonstrating excellence in distance learning. The FGDLA Award Luncheon is hosted on December 8th, at 11:50 AM in Room 151A at the Washington D.C. Convention Center. Individual Awards: Hall of Fame: In recognition of an individual who has made significant contributions in promoting and developing distance learning in the Federal Government. Honoree: Dr. Kenneth P. Pisel, Joint Forces Staff College, National Defense University Pioneer: In recognition of an individual demonstrating initiative and leadership in the development and implementation of distance learning in the Federal Government. Five Honorees: Dale Carpenter, Distance Learning Group, National Park Service Andrea Simonelli, Information Technology Department, Naval Air Warfare Center Aircraft Division Naval Air Systems Command Dr. Damon Regan, Advanced Distributed Learning Initiative JoAnne Green, iCollege, National Defense University Paul Thurkettle, NATO E-Learning, Allied Command Transformation Organizational Awards: Five-Star: In recognition of an organization demonstrating excellence in providing enterprise-wide distance learning solutions for the Federal Government. Three Honorees: Acquisition Career Management Group Acquisition Policy and Oversight Federal Aviation Administration Digital Learning Network, National Aeronautics and Space Administration Information Technology Department, Naval Air Warfare Center Aircraft Division Naval Air Systems Command Innovation: In recognition of an organization demonstrating leadership in the development of emerging distance learning technologies providing enterprise-wide solutions for the Federal Government. Three Honorees: Distance Learning Group National Park Service (NPS), Advanced Distribute Learning Initiative Office of the Undersecretary of Defense (Personnel & Readiness), NATO E-Learning Allied Command Transformation Eagle: In recognition of an individual who has served the Federal Government distance learning community by providing exceptional leadership, vision, and advocacy. Honoree: College of Distance Education and Training Marine Corps University Pillar: In recognition for outstanding service or significant contribution to the Association by an organization not affiliated with the Federal Government Honoree: Elearning! Media Group, Publishers of Elearning! and Government Elearning! Magazines “Elearning! Media Group is honored to win the FGDLA Pillar Award for contributions to the FGDLA,” says Catherine Upton, Group Publisher, Elearning! Media Group. “It’s an honor to be recognized and to support the FGDLA in honoring the contributions of our friends within the federal government.” About GLTS Government Learning Technology Symposium is a free two-day conference for government personnel. Uniquely focused on the needs of Federal Government distance learning professionals, GLTS provides a venue for professionals to make connections, discuss the latest developments, and identify new regulations and trends that affect our industry. If you are involved in learning, talent development, mission execution, HR services, project management, team training and leadership, you should attend GLTS. The FGDLA Award Luncheon is a ticketed invitation only event hosted on December 8th, at 11:50 AM in Room 151A at the Washington D.C. Convention Center. The GLTS is co-located with Government Video Expo (GV Expo), held at the Washington D.C. Convention Center, Dec. 7-8, 2016. The GV EXPO is the East Coast’s largest technology event designed for video, broadcast, and AV professionals. The GLTS is produced by the FGDLA and includes two days of consecutive sessions featuring presentations on instructional design, video and animation design for distance learning, LMS integration, 508 Accessibility Compliance, Learning Record Stores, and much more. The FGDLA is also hosting its annual awards, recognizing Federal Government agencies and organizations for their excellence in distance learning. For a full list of sessions, visit http://glts.fgdlaevents.us/ ##END## About Federal Government Distance Learning Association (FGDLA) The Federal Government Distance Learning Association (FGDLA) is a nonprofit, professional association formed to promote the development and application of distance learning in the Federal Government, in accordance with Section 501(c)(6) of the Internal Revenue Code for Business Leagues and charted by the State of Ohio. Additionally, the Association actively fosters collaboration and understanding among those involved in leveraging technology and instructional media in support of the education and training needs of the Federal Government. Focused on supporting Federal Government agencies involved in distance learning, the FGDLA encourages the application of all forms of distance learning media, as well as embracing innovative methods in integrating instructional technologies to meet the training and education needs of the Federal Government. Our membership is derived primarily from individuals from individuals employed by the various agencies within the Federal Government. The FGDLA is a chapter of the United States Distance Learning Association. employed by the various agencies within the Federal Government. The FGDLA is a chapter of the United States Distance Learning Association.
Zhang J.,Medical College of Wisconsin |
Yoganandan N.,Medical College of Wisconsin |
Pintar F.A.,Medical College of Wisconsin |
Guan Y.,Medical College of Wisconsin |
And 3 more authors.
Journal of Biomechanics | Year: 2011
Postmortem preservation conditions may be one of factors contributing to wide material property variations in brain tissues in literature. The objective of present study was to determine the effects of preservation temperatures on high strain-rate material properties of brain tissues using the split Hopkinson pressure bar (SHPB). Porcine brains were harvested immediately after sacrifice, sliced into 2mm thickness, preserved in ice cold (group A, 10 samples) and 37°C (group B, 9 samples) saline solution and warmed to 37°C just prior to the test. A SHPB with tube aluminum transmission bar and semi-conductor strain gauges were used to enhance transmitted wave signals. Data were gathered using a digital acquisition system and processed to obtain stress-strain curves. All tests were conducted within 4h postmortem. The mean strain-rate was 2487±72s -1. A repeated measures model with specimen-level random effects was used to analyze log transformed stress-strain responses through the entire loading range. The mean stress-strain curves with ±95% confidence bands demonstrated typical power relationships with the power value of 2.4519 (standard error, 0.0436) for group A and 2.2657 (standard error, 0.0443) for group B, indicating that responses for the two groups are significantly different. Stresses and tangent moduli rose with increasing strain levels in both groups. These findings indicate that storage temperatures affected brain tissue material properties and preserving tissues at 37°C produced a stiffer response at high strain-rates. Therefore, it is necessary to incorporate material properties obtained from appropriately preserved tissues to accurately predict the responses of brain using stress analyses models, such as finite element simulations. © 2010.
Schmidt A.L.,Duke University |
Paskoff G.,Naval Air Warfare Center Aircraft Division |
Shender B.S.,Naval Air Warfare Center Aircraft Division |
Bass C.R.,Duke University
Spine | Year: 2012
STUDY DESIGN. Survival analyses of a large cohort of published lumbar spine compression fatigue tests. OBJECTIVE. To produce the first large-scale evaluation of human lumbar spine tolerance to repetitive compressive loading and to evaluate and improve guidelines for human exposure to whole-body vibration and repeated mechanical shock environments. SUMMARY OF BACKGROUND DATA. Several studies have examined the effects of compressive cyclic loading on the lumbar spine. However, no previous effort has coalesced these studies and produced an injury risk analysis with an expanded sample size. Guidelines have been developed for exposure limits to repetitive loading (e.g., ISO 2631-5), but there has been no large-scale verification of the standard against experimental data. METHODS. Survival analyses were performed using the results of 77 male and 28 female cadaveric spinal segment fatigue tests from 6 previously published studies. Segments were fixed at each end and exposed to axial cyclic compression. The effects of the number of cycles, load amplitude, sex, and age were examined through the use of survival analyses. RESULTS. Number of cycles, load amplitude, sex, and age all are significant factors in the likelihood of bony failure in the spinal column. Using a modification of the risk prediction parameter from ISO 2631-5, an injury risk model was developed, which relates risk of vertebral failure to repeated compressive loading. The model predicts lifetime risks less than 7% for industrial machinery exposure from axial compression alone. There was a 38% risk for a high-speed planing craft operator, consistent with epidemiological evidence. CONCLUSION. A spinal fatigue model which predicts the risk of in vitro lumbar spinal failure within a narrow confidence interval has been developed. Age and sex were found to have significant effects on fatigue strength, with sex differences extending beyond those accounted for by endplate area disparities. © 2012, Lippincott Williams & Wilkins.
Lee E.U.,Naval Air Warfare Center Aircraft Division |
Taylor R.E.,Naval Air Warfare Center Aircraft Division
Engineering Fracture Mechanics | Year: 2011
The biaxiality effect, especially the effect of non-singular stress cycling, on the fatigue behavior was studied, employing cruciform specimens of aluminum alloys 1100-H14 and 7075-T651. The specimens, containing a transverse or a 45o inclined center notch, were subjected to in-phase (IP) or 100% out-of-phase (hereinafter referred to as "out-of-phase or OP") loading of stress ratio 0.1 in air. The biaxiality ratio λ ranged from 0 to 1.5, and 3 levels of stress were applied. It was observed that: (1) at a given λ, a lower longitudinal stress induced a longer fatigue life under IP and OP loading, and the fatigue life was longer under IP loading, (2) the fatigue crack path profile was influenced by λ, phase angle (0o or 180o), and initial center notch (transverse or 45o inclined); (3) the fatigue crack path profiles, predicted analytically and determined experimentally, had similar features for the specimens with a transverse center notch under IP loading; and (4) the fatigue crack growth rate was lower and the fatigue life longer for a greater λ under IP loading, whereas it changed little with change in λ under OP loading. These results demonstrate that non-singular stress cycling affects the biaxial fatigue behavior of aluminum alloys 1100-H14 and 7065-T651under IP and OP loading. © 2010.
Bark L.W.,Naval Air Warfare Center Aircraft Division
Annual Forum Proceedings - AHS International | Year: 2014
A full-scale crash test of a USMC CH-46 helicopter airframe was conducted at NASA-Langley Research Center. One of the internal experiments was an assessment of mobile aircrew restraint concepts. Two Hybrid III Pedestrian Anthropomorphic Test Devices (ATD's) were positioned in a standing position, just aft of the crew door. On the left side, a traditional gunner's belt was employed. On the right side, the Mobile Aircrew Restraint System (MARS) was employed with the Aircrew Endurance vest. The motivation behind this experiment was based on several mishap-based injuries of mobile aircrew that were using traditional gunner's belts. However, correlation of presumed injury causes with equipment deficiencies was difficult because of a near total void of mobile aircrew restraint testing data in a system-level environment. For the condition tested, the measured results for the two ATD's indicated a dramatic reduction in injury probability when employing the MARS. In contrast, the ATD equipped with the gunner's belt experienced accelerations and forces that could generally be considered lethal. © 2014 by the American Helicopter Society International, Inc. All rights reserved.
Ricker R.E.,U.S. National Institute of Standards and Technology |
Lee E.U.,Naval Air Warfare Center Aircraft Division |
Taylor R.,Naval Air Warfare Center Aircraft Division |
Lei C.,Naval Air Warfare Center Aircraft Division |
And 2 more authors.
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science | Year: 2013
The influence of chloride ion activity on the susceptibility of aluminum alloys 5083-H131 and 7075-T6 to stress corrosion cracking (SCC) was investigated by conducting slow strain-rate tensile tests at a strain-rate of 10 -7 s-1 in naturally aerated aqueous solutions with varying NaCl mass fraction (0.001 to 20 pct) and in a 3.5 pct mass fraction NaCl solution with varying strain-rates (10-8 to 10-4 s -1). This study found that both alloys exhibited reduced strengths and failure strains (times) in the solutions compared with laboratory air. The extent of these reductions was greater in alloy 5083 for the conditions examined. The strength and ductility of both alloys decreased with chloride ion activity in a manner that indicates a chemical reaction is responsible. The strength and ductility of both alloys decreased with strain-rate in a sigmoidal manner, but the transition in alloy 7075 occurred at slower strain-rates of approximately two orders of magnitude. It was deduced that the chloride ion interacts chemically with the passivated surface in the potential gradient at the crack tip to cause SCC. While no mechanism of cracking can be eliminated on the basis of these results alone, the results are consistent with the hypothesis that the absorbed hydrogen causes cracking in alloy 7075 while cracking in 5083 is the result of a dissolution mechanism. © 2012 The Minerals, Metals & Materials Society and ASM International (outside the USA).
PubMed | Naval Air Warfare Center Aircraft Division
Type: Journal Article | Journal: PloS one | Year: 2017
A sensorless algorithm was developed to predict rotor speeds in an electric three-phase induction motor. This sensorless model requires a measurement of the stator currents and voltages, and the rotor speed is predicted accurately without any mechanical measurement of the rotor speed. A model of an electric vehicle undergoing acceleration was built, and the sensorless prediction of the simulation rotor speed was determined to be robust even in the presence of fluctuating motor parameters and significant sensor errors. Studies were conducted for varying pulse width modulator resolutions, and the sensorless model was accurate for all resolutions of sinusoidal voltage functions.
News Article | October 28, 2016
CHANTILLY, Va.--(BUSINESS WIRE)--Engility was awarded a $71 million contract by the Naval Air Warfare Center Aircraft Division (NAWCAD) to deliver systems engineering on U.S. naval aircraft and weapons systems.