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Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Underwater wireless ad hoc sensor networks are aimed at remotely monitoring various aquatic activities, such as marine biological and zoological lives, geological changes, and  

E-Print Network (OSTI)

Abstract Underwater wireless ad hoc sensor networks are aimed at remotely monitoring various aquatic activities, such as marine biological and zoological lives, geological changes, and underwater quality of service is more difficult in underwater net- works due to large underwater propagation delay

Kumar, M. Jagadesh

2

Determining Bottom Reflectance and Water Optical Properties Using Unmanned Underwater Vehicles under Clear or Cloudy Skies  

Science Conference Proceedings (OSTI)

An unmanned underwater vehicle (UUV) with hyperspectral optical sensors that measure downwelling irradiance and upwelling radiance was deployed over sandy bottoms, sea grass patches, and coral reefs near Lee Stocking Island, Bahamas, during the ...

David C. English; Kendall L. Carder

2006-02-01T23:59:59.000Z

3

Determining Turbulent Vertical Velocity, and Fluxes of Heat and Salt with an Autonomous Underwater Vehicle  

Science Conference Proceedings (OSTI)

The authors show that vertical turbulent fluxes in the upper ocean can be measured directly with an autonomous underwater vehicle (AUV). A horizontal profile of vertical water velocity is obtained by applying a Kalman smoother to AUV motion data. ...

Daniel R. Hayes; James H. Morison

2002-05-01T23:59:59.000Z

4

Underwater cities  

NLE Websites -- All DOE Office Websites (Extended Search)

Underwater cities Name: hasinoff Location: NA Country: NA Date: NA Question: I have a student who is doing a project on underwater cities. What are the most important technical...

5

Design and Control of Autonomous Underwater Robots: A Survey  

Science Conference Proceedings (OSTI)

During the 1990s, numerous worldwide research and development activities have occurred in underwater robotics, especially in the area of autonomous underwater vehicles (AUVs). As the ocean attracts great attention on environmental issues and resources ... Keywords: autonomous underwater vehicles, underwater navigation and control, underwater robots

J. Yuh

2000-01-01T23:59:59.000Z

6

Underwater Glider System Study  

E-Print Network (OSTI)

Leonard, N. E. , “ONR Underwater Glider Systems Study GliderDavis. The Autonomous Underwater Glider Spray. IEEE Journalto the ONR Committee for Underwater Glider Systems Study,

2003-01-01T23:59:59.000Z

7

Three-dimensional ocean chlorophyll distributionsfrom underwater  

E-Print Network (OSTI)

Three-dimensional ocean chlorophyll distributionsfrom underwater serial-sectioned fluorescence images Andrew W. Palowitch and Jules S. Jaffe An underwater optical serial-sectioning technique that the underwater optical serial- sectioning technique is practical for in situ determination and analysis

Jaffe, Jules

8

Target tracking onboard an autonomous underwater vehicle: determining optimal towed array heading in an anisotropic noise field .  

E-Print Network (OSTI)

??In order to overcome the challenges that an anisotropic noise field poses for underwater target tracking, we conduct an onboard estimation of the horizontal noise… (more)

Parra-Orlandoni, Maria Alejandra.

2007-01-01T23:59:59.000Z

9

The underwater radiance distribution problem  

E-Print Network (OSTI)

THE UNDERWATER RADIANCE DISTRIBUTION PROBLEM S. Q. DuntleyFunction of Depth in an Underwater Environment," which firsta Function of Depth in an Underwater Environment," which has

Duntley, Seibert Q

1959-01-01T23:59:59.000Z

10

Clear underwater vision  

E-Print Network (OSTI)

Underwater imaging is important for scientific research and technology, as well as for popular activities. We present a computer vision approach which easily removes degradation effects in underwater vision. We analyze the physical effects of visibility degradation. We show that the main degradation effects can be associated with partial polarization of light. We therefore present an algorithm which inverts the image formation process, to recover a good visibility image of the object. The algorithm is based on a couple of images taken through a polarizer at different orientations. As a by product, a distance map of the scene is derived as well. We successfully used our approach when experimenting in the sea using a system we built. We obtained great improvement of scene contrast and color correction, and nearly doubled

Yoav Y. Schechner; Nir Karpel

2004-01-01T23:59:59.000Z

11

Underwater Mortgages  

E-Print Network (OSTI)

House prices have fallen approximately 30 % from their peak in 2006, accompanied by a level of defaults and foreclosures without precedent in the post-World War II era. Many homeowners have mortgages with principal amounts higher than the market value of their properties. In general, though, the rational default point is below the “underwater ” point where house price equals the remaining loan balance, and depends on prospects for future house price appreciation and borrower default costs. Housing market analysts often explain mortgage defaults as a consequence of life events such as divorce, illness, or job loss. No doubt, such events figure importantly in a borrower’s ability to repay a mortgage. However, except for unemployment, which varies with the business cycle, life events occur with unfortunate regularity. By contrast, mortgage default rates vary substantially over time. It is clear then that life events lead to defaults when they occur in combination with some other factor. It seems most likely that this other factor is a change in house prices. Default and foreclosure are costly for borrowers. They would rather avoid these expenses by selling their houses and prepaying their mortgages instead of defaulting. They can and will do so when house prices are increasing or flat. The default rate increases in periods when house prices have fallen, making mortgage prepayment through resale or refinancing difficult. Given the importance of falling house prices as a factor in defaults, it is natural to ask how far they must drop before it serves the borrower’s rational interest to strategically default, that is, to walk away from a mortgage even in the absence of a life event. A common answer is that house prices must fall to a point where the value of the house is less than the remaining loan balance, or when the house is “underwater ” (see Thaler 2010, for example). The map in Figure 1 estimates the incidence of underwater first-lien mortgages in 2000. We do not know the actual values of the underlying properties

Krainer; Stephen Leroy

2010-01-01T23:59:59.000Z

12

Underwater manipulator  

DOE Patents (OSTI)

Self-contained, waterproof, water-submersible, remote-controlled apparatus is provided for manipulating a device, such as an ultrasonic transducer for measuring crack propagation on an underwater specimen undergoing shock testing. The subject manipulator includes metal bellows for transmittal of angular motions without the use of rotating shaft seals or O-rings. Inside the manipulator, a first stepper motor controls angular movement. In the preferred embodiment, the bellows permit the first stepper motor to move an ultrasonic transducer .+-.45 degrees in a first plane and a second bellows permit a second stepper motor to move the transducer .+-.10 degrees in a second plane orthogonal to the first. In addition, an XY motor-driven table provides XY motion.

Schrum, Phillip B. (Clairton, PA); Cohen, George H. (Pittsburgh, PA)

1993-01-01T23:59:59.000Z

13

Underwater manipulator  

DOE Patents (OSTI)

Self-contained, waterproof, water-submersible, remote-controlled apparatus is described for manipulating a device, such as an ultrasonic transducer for measuring crack propagation on an underwater specimen undergoing shock testing. The subject manipulator includes metal bellows for transmittal of angular motions without the use of rotating shaft seals or O-rings. Inside the manipulator, a first stepper motor controls angular movement. In the preferred embodiment, the bellows permit the first stepper motor to move an ultrasonic transducer [plus minus]45 degrees in a first plane and a second bellows permit a second stepper motor to move the transducer [plus minus]10 degrees in a second plane orthogonal to the first. In addition, an XY motor-driven table provides XY motion.

Schrum, P.B.; Cohen, G.H.

1993-04-20T23:59:59.000Z

14

Underwater manipulator  

DOE Patents (OSTI)

This invention is comprised of a self-contained, waterproof, water-submersible, remote-controlled apparatus provided for manipulating a device, such as an ultrasonic transducer for measuring crack propagation on an underwater specimen undergoing shock testing. The subject manipulator includes metal bellows for transmittal of angular motions without the use of rotating shaft seals or O-rings. Inside the manipulator, a first stepper motor controls angular movement. In the preferred embodiment, the bellows permit the first stepper motor to move an ultrasonic transducer {plus_minus} 45 degrees in a first plane and a second bellows permit a second stepper motor to move the transducer {plus_minus} 10 degrees in a second plane orthogonal to the first. In addition, an XY motor-driven table provides XY motion.

Schrum, P.B.; Cohen, G.H.

1992-12-31T23:59:59.000Z

15

Exploring underwater target detection by imaging polarimetry and correlation techniques  

E-Print Network (OSTI)

1 Exploring underwater target detection by imaging polarimetry and correlation techniques M *Corresponding author: ayman.al-falou@isen.fr Underwater target detection is investigated by combining active. This experimentally study illustrates the potential of polarization imaging for underwater target detection and opens

Paris-Sud XI, Université de

16

Color-Accurate Underwater Imaging using Perceptual Adaptive Illumination  

E-Print Network (OSTI)

Color-Accurate Underwater Imaging using Perceptual Adaptive Illumination Iuliu Vasilescu, Carrick, and ecosystem health and activity monitoring. Underwater robots are equipped with motor control for large scale transects but they lack sensors that enable capturing color-accurate underwater images. We present a method

Farritor, Shane

17

UNDERWATER COATINGS FOR CONTAMINATION CONTROL  

SciTech Connect

The Idaho National Laboratory (INL) deactivated several aging nuclear fuel storage basins. Planners for this effort were greatly concerned that radioactive contamination present on the basin walls could become airborne as the sides of the basins became exposed during deactivation and allowed to dry after water removal. One way to control this airborne contamination was to fix the contamination in place while the pool walls were still submerged. There are many underwater coatings available on the market for marine, naval and other applications. A series of tests were run to determine whether the candidate underwater fixatives were easily applied and adhered well to the substrates (pool wall materials) found in INL fuel pools. Lab-scale experiments were conducted by applying fourteen different commercial underwater coatings to four substrate materials representative of the storage basin construction materials, and evaluating their performance. The coupons included bare concrete, epoxy painted concrete, epoxy painted carbon steel, and stainless steel. The evaluation criteria included ease of application, adherence to the four surfaces of interest, no change on water clarity or chemistry, non-hazardous in final applied form and be proven in underwater applications. A proprietary two-part, underwater epoxy owned by S. G. Pinney and Associates was selected from the underwater coatings tested for application to all four pools. Divers scrubbed loose contamination off the basin walls and floors using a ship hull scrubber and vacuumed up the sludge. The divers then applied the coating using a special powered roller with two separate heated hoses that allowed the epoxy to mix at the roller surface was used to eliminate pot time concerns. The walls were successfully coated and water was removed from the pools with no detectable airborne contamination releases.

Julia L. Tripp; Kip Archibald; Ann Marie Phillips; Joseph Campbell

2004-02-01T23:59:59.000Z

18

TECHNOLOGY DEMONSTRATION UNDERWATER HYDROLASING PHASE 0 & 1 & 2 TECHNICAL REPORT  

Science Conference Proceedings (OSTI)

From September 10 through December 17th, 2003, S.A.Robotics executed Phases 0, I, and II of the Technology Demonstration - Underwater Hydrolasing. Phase 0 was performed at the S.A.Robotics facility in Loveland, Colorado, while Phases I and II were performed at the Hanford K-Basin East Site. The purpose of the demonstrations was to show (1) underwater hydrolasing is a feasible method of removing contaminated concrete underwater to a required depth, (2) the hydrolasing head could be controlled during operation, (3) the depth of contamination in the concrete structure could be accurately measured, and (4) a characterization of the waste stream during hydrolasing activities could be recorded. Video monitoring was also used during all demonstrations. All phases of the demonstration were completed and deemed a success by both the observers and the demonstration team. Single and multiple passes were made using variable cutting rates, different stand-off distances were tested, and stationary cuts were executed. Hot and cold hyrdolasing was performed with radiological and depth scans of the affected surfaces. Specially designed equipment was installed and operated within the contaminated environment of 100-K East Basin. Separate results are documented below by phase. The Phase II radiological demonstration was performed to determine the feasibility of underwater hydrolasing technology for decontamination of the DOE spent fuel basins at Hanford 100-K area. This project demonstration was conducted at 105 KE Basin with the expectation that, once proven, this technology can be implemented at Hanford and other DOE sites.

CHRONISTER, G.B.

2005-06-08T23:59:59.000Z

19

Multicolor Underwater Imaging Techniques.  

E-Print Network (OSTI)

??Studies were conducted on multispectral polarimetric subtraction imaging techniques for underwater imaging that use a broadband light source. The main objective of this study was… (more)

Waggoner, Douglas Scott

2007-01-01T23:59:59.000Z

20

Underwater Nonlinear Acoustic Speaker.  

E-Print Network (OSTI)

??In this work an acoustic parametric array for underwater use was designed, built and tested. An acoustic parametric array creates a focused beam of sound… (more)

Andersson, Sara

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

In-Situ Characterization of Underwater Radioactive Sludge  

Science Conference Proceedings (OSTI)

A fundamental requirement underpinning safe clean-up technologies for legacy spent nuclear fuel (SNF) ponds, pools and wet silos is the ability to characterize the radioactive waste form prior to retrieval. The corrosion products resulting from the long term underwater storage of spent nuclear fuel, reactor components and reprocessing debris present a major hazard to facility decontamination and decommissioning in terms of their radioactive content and physical / chemical reactivity. The ability to perform in-situ underwater non-destructive characterization of sludge and debris in a safe and cost-effective manner offers significant benefits over traditional destructive sampling methods. Several techniques are available for underwater measurements including (i) Gross gamma counting, (ii) Low-, Medium- and High- Resolution Gamma Spectroscopy, (iii) Passive neutron counting and (iv) Active Neutron Interrogation. The optimum technique depends on (i) the radioactive inventory (ii) mechanical access restrictions for deployment of the detection equipment, interrogation sources etc. (iii) the integrity of plant records and (iv) the extent to which Acceptable Knowledge which may be used for 'fingerprinting' the radioactive contents to a marker nuclide. Prior deployments of underwater SNF characterization equipment around the world have been reviewed with respect to recent developments in gamma and neutron detection technologies, digital electronics advancements, data transfer techniques, remote operation capabilities and improved field ruggedization. Modeling and experimental work has been performed to determine the capabilities, performance envelope and operational limitations of the future generation of non-destructive underwater sludge characterization techniques. Recommendations are given on the optimal design of systems and procedures to provide an acceptable level of confidence in the characterization of residual sludge content of legacy wet storage facilities such that retrieval and repackaging of SNF sludges may proceed safely and efficiently with support of the regulators and the public. (author)

Simpson, A.P.; Clapham, M.J.; Swinson, B. [Pajarito Scientific Corp., Santa Fe, NM (United States)

2008-07-01T23:59:59.000Z

22

Cooperative Communication over Underwater Acoustic Channels.  

E-Print Network (OSTI)

??As diverse and data-heavy underwater applications emerge, demanding requirements are further imposed on underwater wireless communication systems. Future underwater wireless communication networks might consist of… (more)

Aldharrab, Suhail Ibrahim

2013-01-01T23:59:59.000Z

23

Computer vision techniques for underwater navigation  

E-Print Network (OSTI)

Vision Techniques for Underwater Navigation A thesisand J. Amat. Positioning an underwater vehicle through imageand S. Feder. Autonomous Underwater Vehicle Navigation. MIT

Barngrover, Christopher M.

2010-01-01T23:59:59.000Z

24

Experiments with Underwater Robot Localization and Tracking  

E-Print Network (OSTI)

J. S. Feder, “Autonomous underwater vehicle navigation,” MITfor an autonomous underwater reef monitoring robot,” intechniques applied to an underwater vehicle,” in Proceedings

Corke, Peter; Detwiler, Carrick; Dunbabin, Matthew; Hamilton, Michael; Rus, Daniela; Vasilescu, Iuliu

2007-01-01T23:59:59.000Z

25

1756 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 57, NO. 3, MAY 2008 Silent Positioning in Underwater  

E-Print Network (OSTI)

in Underwater Acoustic Sensor Networks Xiuzhen Cheng, Member, IEEE, Haining Shu, Student Member, IEEE, Qilian a silent positioning scheme termed UPS for underwater acoustic sensor networks. UPS relies on the time and provides location privacy at underwater vehicles/sensors whose locations need to be determined. To study

Cheng, Xiuzhen "Susan"

26

Underwater Bomb Trajectory Prediction for Stand-off Assault (Mine/IED) Breaching Weapon  

E-Print Network (OSTI)

Underwater Bomb Trajectory Prediction for Stand-off Assault (Mine/IED) Breaching Weapon Fuse to determine accurately underwater (full-size) bomb trajectory path so that the final detonation position of a six degrees of freedom (6-DOF) model to predict underwater high-speed bomb trajectory and orientation

Chu, Peter C.

27

Underwater Gliders: Recent Developments and Future Applications  

E-Print Network (OSTI)

Underwater Gliders: Recent Developments and Future Applications (Invited Paper) R. Bachmayer, N underwater vehicles, and in particular au- tonomous underwater gliders, represent a rapidly maturing of an underwater glider system for propulsion, control, communication and sensing. A typical glider operation

Leonard, Naomi

28

Underwater Coatings for Contamination Control  

Science Conference Proceedings (OSTI)

The Idaho National Engineering and Environmental Laboratory (INEEL) is deactivating several fuel storage basins. Airborne contamination is a concern when the sides of the basins are exposed and allowed to dry during water removal. One way of controlling this airborne contamination is to fix the contamination in place while the pool walls are still submerged. There are many underwater coatings available on the market that are used in marine, naval and other applications. A series of tests were run to determine whether the candidate underwater fixatives are easily applied and adhere well to the substrates (pool wall materials) found in INEEL fuel pools. The four pools considered included 1) Test Area North (TAN-607) with epoxy painted concrete walls; 2) Idaho Nuclear Technology and Engineering Center (INTEC) (CPP-603) with bare concrete walls; 3) Materials Test Reactor (MTR) Canal with stainless steel lined concrete walls; and 4) Power Burst Facility (PBF-620) with stainless steel lined concrete walls on the bottom and epoxy painted carbon steel lined walls on the upper portions. Therefore, the four materials chosen for testing included bare concrete, epoxy painted concrete, epoxy painted carbon steel, and stainless steel. The typical water temperature of the pools varies from 55oF to 80oF dependent on the pool and the season. These tests were done at room temperature. The following criteria were used during this evaluation. The underwater coating must: · Be easy to apply · Adhere well to the four surfaces of interest · Not change or have a negative impact on water chemistry or clarity · Not be hazardous in final applied form · Be proven in other underwater applications. In addition, it is desirable for the coating to have a high pigment or high cross-link density to prevent radiation from penetrating. This paper will detail the testing completed and the test results. A proprietary two-part, underwater epoxy owned by S. G. Pinney and Associates was selected to be applied by divers after scrubbing loose contamination off the basin walls and floors using a ship hull scrubber and vacuuming up the sludge. A special powered roller with two separate heated hoses that allowed the epoxy to mix at the roller surface was used to eliminate pot time concerns. The walls were successfully coated and water was removed from the pool with no airborne contamination problems.

Julia L. Tripp; Kip Archibald; Ann-Marie Phillips; Joseph Campbell

2004-02-01T23:59:59.000Z

29

Cooperative Schemes for Underwater Acoustic Communications (AQU 3)  

E-Print Network (OSTI)

Cooperative Schemes for Underwater Acoustic CommunicationsIntroduction: Underwater Cooperative CommunicationsMotivation Traditional underwater communications Used for

Madhavan Vajapeyam; Satish Vedantam; Urbashi Mitra

2006-01-01T23:59:59.000Z

30

TIMEOPTIMAL CONTROL FOR UNDERWATER VEHICLES  

E-Print Network (OSTI)

TIME­OPTIMAL CONTROL FOR UNDERWATER VEHICLES M. Chyba #,1 N.E. Leonard #,1 E.D. Sontag ##,2 problems for a special class of controlled mechanical systems, underwater vehicles. Lie algebras associated­optimal trajectories. We apply the general theory to a model of an underwater vehicle and illustrate our results

Sontag, Eduardo

31

Autonomous Underwater Gliders Wood, Stephen  

E-Print Network (OSTI)

26 Autonomous Underwater Gliders Wood, Stephen Florida Institute of Technology United States underwater vehicles to perform ocean surveys. With these vehicles it is now possible for the scientist substances in the ocean such as chemicals from an underwater vent or toxic algae such as red tide

Wood, Stephen L.

32

Oxygen in Underwater Cave  

NLE Websites -- All DOE Office Websites (Extended Search)

Oxygen in Underwater Cave Oxygen in Underwater Cave Name: Natalie Status: student Grade: 9-12 Location: HI Country: USA Date: Spring 2011 Question: Is it possible for there to be free oxygen in an underwater cave? If it is, then how does it work? Replies: Yes it is possible as I have personally experienced. If the cave roof rises to a level above the water, air dissolved in the water will slowly out gas until the water is at the same level at all places. A pocket of breathable air will form. In many caves the roof dips below water level in one place but it above it on both sides. Think of a U shaped tube where the bottom of the U is blocked by water. This is called a siphon and I have passed through many of these to find breathable air on the other side. R. W. "Bob" Avakian Oklahoma State Univ. Inst. of Technology

33

Wireless Underwater Communications  

Science Conference Proceedings (OSTI)

The depths of the oceans have a high potential for future industrial development and applications. Robotic autonomous systems will greatly depend on a reliable communications channel with operators and equipment either performing joint operations or ... Keywords: Acoustic communications, Channel modelling, Networking mechanisms, Underwater

J. Poncela; M. C. Aguayo; P. Otero

2012-06-01T23:59:59.000Z

34

Sparse Multichannel Estimation Algorithm for Cooperative Underwater Acoustic Communication Networks  

E-Print Network (OSTI)

Introduction: Cooperative Underwater Acoustic Communicationsgain for wireless and underwater network in interference-

Richard, Nick; Mitra, Urbasi

2007-01-01T23:59:59.000Z

35

Underwater noise caused by snapping shrimp  

E-Print Network (OSTI)

E. 0. ~ulbert,,~~An Underwater Sound of Natural Qrigin,!! J.Sect ion, Feb. 3, 1943. UNDERWATER SOUN~SOF OLOG l CALOF CERTAl N Bl OLOGl CAL UNDERWATER SOUND ON 'THE EAST COAST

University of California, Division of War Research at the U.S. Navy Electronics Laboratory,

1946-01-01T23:59:59.000Z

36

Underwater Sensor Networks: Applications, Advances, and Challenges  

E-Print Network (OSTI)

Underwater Sensor Networks: Applications, Advances, and Challenges By John Heidemann1 , Milica- mentation of underwater wireless sensor networks. We summarize key applications and the main phenomena hardware, testbeds, and simulation tools available to the research community. Keywords: underwater

Heidemann, John

37

Intelligent Planning for Autonomous Underwater Vehicles  

E-Print Network (OSTI)

Intelligent Planning for Autonomous Underwater Vehicles Zeyn Saigol January 31, 2007 Supervisors Underwater Vehicles Classical planning systems Problem specification Markov Decision Processes 2 / 10 #12 in relaxing these planning under uncertainty Application area: Autonomous Underwater Vehicles (AUVs) used

Yao, Xin

38

Underwater cladding with laser beam and plasma arc welding  

SciTech Connect

Two welding processes, plasma arc (transferred arc) (PTA) and laser beam, were investigated to apply cladding to austenitic stainless steels and Inconel 600. These processes have long been used to apply cladding layers , but the novel feature being reported here is that these cladding layers were applied underwater, with a water pressure equivalent to 24 m (80 ft). Being able to apply the cladding underwater is very important for many applications, including the construction of off-shore oil platforms and the repair of nuclear reactors. In the latter case, being able to weld underwater eliminates the need for draining the reactor and removing the fuel. Welding underwater in reactors presents numerous challenges, but the ability to weld without having to drain the reactor and remove the fuel provides a huge cost savings. Welding underwater in reactors must be done remotely, but because of the radioactive corrosion products and neutron activation of the steels, remote welding would also be required even if the reactor is drained and the fuel removed. In fact, without the shielding of the water, the remote welding required if the reactor is drained might be even more difficult than that required with underwater welds. Furthermore, as shall be shown, the underwater welds that the authors have made were of high quality and exhibit compressive rather than tensile residual stresses.

White, R.A.; Fusaro, R.; Jones, M.G.; Solomon, H.D. [General Electric Corporate Research and Development Center, Schenectady, NY (United States); Milian-Rodriguez, R.R. [GE Nuclear Energy, San Jose, CA (United States)

1997-01-01T23:59:59.000Z

39

Silent Positioning in Underwater Acoustic Sensor Networks  

E-Print Network (OSTI)

In this paper, we present a silent positioning scheme termed as UPS for underwater acoustic sensor networks. UPS relies on the time-difference of arrivals measured locally at a sensor to detect range differences from the sensor to four anchor nodes. These range differences are averaged over multiple beacon intervals before they are combined to estimate the 3D sensor location through trilateration. UPS requires no time-synchronization and provides location privacy at underwater vehicles/sensors whose locations need to be determined. To study the performance of UPS, we model the underwater acoustic channel as a modified Ultra Wide Band (UWB) S-V model: the arrival of each path cluster and paths within each cluster follow double Poisson distributions, and the multipath channel gain follows a Rician distribution. Based on this channel model, we perform both theoretical analysis and simulation study on the position error of UPS under acoustic fading channels. The obtained results indicate that UPS is an effective scheme for underwater vehicle/sensor self-positioning.

Xiuzhen Cheng; Haining Shu; Qilian Liang; David Hung-chang Du

2007-01-01T23:59:59.000Z

40

Networking support for underwater wireless networks.  

E-Print Network (OSTI)

?? Underwater wireless networks provide many opportunities for exploration, environmental monitoring, and military applications. Future growth of underwater networks seems promising as much of the… (more)

Kredo, Kurtis B., II

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Cooperative Localization for Autonomous Underwater Vehicles  

E-Print Network (OSTI)

This paper describes an algorithm for distributed acoustic navigation for Autonomous Underwater Vehicles

Bahr, Alexander

42

A Small Submarine Robot for Experiments in Underwater Sensor Networks  

E-Print Network (OSTI)

The Development of Autonomous Underwater Vehicles (AUVs); AA Solar Powered Autonomous Underwater Vehi- cle System,The Phoenix Autonomous Underwater Vehicle, chapter 13, AI-

V. Bokser; C. Oberg; G. Sukhatme; A. Requicha

2004-01-01T23:59:59.000Z

43

MAC and Routing Protocols for Mobile Underwater Acoustic Sensor Swarms  

E-Print Network (OSTI)

Pressure Routing for Underwater Sensor Networks . . . . . .of Aloha Protocols for Underwater Acoustic Sensor Networks.Critical Applications in Underwater Sensor Networks. In

Noh, Young Tae

2012-01-01T23:59:59.000Z

44

Strategies in tracking and localization of distributed underwater systems  

E-Print Network (OSTI)

decoding approach for underwater acoustic communications",Mobility Prediction for Underwater Sensor Networks", W U W NH . V . , "Localization in Underwater Sensor Networks Survey

Mirza, Diba

2010-01-01T23:59:59.000Z

45

Iterative equalization and decoding applied to underwater acoustic communication  

E-Print Network (OSTI)

1.1 Shallow Underwater Acoustic Channels . . . . . . . .and Decoding Approach for Underwater Acoustic Commu-Equalization and Decoding of Underwater Acoustic Using Array

Sifferlen, James F.

2008-01-01T23:59:59.000Z

46

Underwater Lighting by Submerged Lasers and Incandescent Sources  

E-Print Network (OSTI)

Techniques for long- range underwater photography usingon Resolving Power in Underwater Photography," J. Opt. Soc.A. R. , Tyler, J. E. , "Underwater Photometer," J. Opt. Soc.

Duntley, Seibert Q

1971-01-01T23:59:59.000Z

47

Neutron Interrogation System For Underwater Threat Detection And Identification  

Science Conference Proceedings (OSTI)

Wartime and terrorist activities, training and munitions testing, dumping and accidents have generated significant munitions contamination in the coastal and inland waters in the United States and abroad. Although current methods provide information about the existence of the anomaly (for instance, metal objects) in the sea bottom, they fail to identify the nature of the found objects. Field experience indicates that often in excess of 90% of objects excavated during the course of munitions clean up are found to be non-hazardous items (false alarm). The technology to detect and identify waterborne or underwater threats is also vital for protection of critical infrastructures (ports, dams, locks, refineries, and LNG/LPG). We are proposing a compact neutron interrogation system, which will be used to confirm possible threats by determining the chemical composition of the suspicious underwater object. The system consists of an electronic d-T 14-MeV neutron generator, a gamma detector to detect the gamma signal from the irradiated object and a data acquisition system. The detected signal then is analyzed to quantify the chemical elements of interest and to identify explosives or chemical warfare agents.

Barzilov, Alexander P.; Novikov, Ivan S.; Womble, Phil C. [Department of Physics and Astronomy, Western Kentucky University, 1906 College Heights Blvd, 11077 Bowling Green, KY 42101 (United States)

2009-03-10T23:59:59.000Z

48

Sound propagation around underwater seamounts  

E-Print Network (OSTI)

In the ocean, low frequency acoustic waves propagate with low attenuation and cylindrical spreading loss over long-ranges, making them an effective tool for underwater source localization, tomography, and communications. ...

Sikora, Joseph J., III

2009-01-01T23:59:59.000Z

49

Underwater Gas Expansion and Deflagration  

E-Print Network (OSTI)

The underwater combustion of a propane-air mixture in an acrylic cylinder is captured on video from multiple angles. This experiment is designed to provide visual data and pressure time-histories for future CFD validation studies.

Jones, Van; Gilbert, John; McCue-Weil, Leigh

2013-01-01T23:59:59.000Z

50

Seismic Imaging of UXO-Contaminated Underwater Sites (Interim Report)  

E-Print Network (OSTI)

Imaging of UXO-Contaminated Underwater Sites” Roland GrittoImaging of UXO-Contaminated Underwater Sites” over the first

Gritto, Roland; Korneev, Valeri; Nihei, Kurt; Johnson, Lane

2004-01-01T23:59:59.000Z

51

Proceedings of the 11th European Conference on Underwater Acoustics ACHIEVABLE RATES OF UNDERWATER ACOUSTIC OFDM  

E-Print Network (OSTI)

Proceedings of the 11th European Conference on Underwater Acoustics ACHIEVABLE RATES OF UNDERWATER-Telecom, Telecom Bretagne, UMR CNRS 6285 Lab-STICC, Ueb, Brest, France J.-M. Passerieux Thales Underwater Systems maintaining acceptable data rates, remains one of the major difficulty faced by underwater acoustic

Paris-Sud XI, Université de

52

www.postersession.com Autonomous Underwater Vehicles of the Underwater Technology Laboratory  

E-Print Network (OSTI)

printed by www.postersession.com Autonomous Underwater Vehicles of the Underwater Technology at depths to 6000 meters. The system will comprise of four key components: 1) an autonomous underwater vehicle (AUV), 2) an underwater refueling and information exchange station, 3) an oceanographic mooring

Wood, Stephen L.

53

Autonomous Underwater Vehicle–Based Hydrographic Sampling  

Science Conference Proceedings (OSTI)

An autonomous underwater vehicle (AUV), the U.S. Navy’s Large Diameter Unmanned Underwater Vehicle (LDUUV), was used as a stable platform for rapid, repeated, near-synoptic CTD measurements of estuarine variability in Narragansett Bay. Surveys ...

Edward R. Levine; Donald N. Connors; Richard R. Shell; Robert C. Hanson

1997-12-01T23:59:59.000Z

54

Path planning methods for Autonomous Underwater Vehicles  

E-Print Network (OSTI)

From naval operations to ocean science missions, the importance of autonomous vehicles is increasing with the advances in underwater robotics technology. Due to the dynamic and intermittent underwater environment and the ...

Yi?it, Konuralp

2011-01-01T23:59:59.000Z

55

Full-duplex underwater networking using CDMA .  

E-Print Network (OSTI)

??Establishing a full-duplex underwater network, researching and applying a CDMA protocol to this network, providing a recommendation for a full-duplex underwater network and providing recommendations… (more)

Bektas, Kurtulus

2004-01-01T23:59:59.000Z

56

Determining Yankee Nuclear Power Station neutron activation  

Science Conference Proceedings (OSTI)

The Yankee nuclear power station located in Rowe, Massachusetts, permanently ceased power operations on February 26, 1992, after 31 yr of operation. Yankee has since initiated decommissioning planning activities. A significant component of these activities is a determination of the extent of radiological contamination of the Yankee site. Included in this effort was determination of the extent of neutron activation of plant components. This paper describes the determination of the neutron activation of the Yankee reactor vessel, associated internals, and surrounding structures. The Yankee reactor vessel is a 600-MW(thermal) stainless steel-lined, carbon steel vessel with stainless steel internal components designed by Westinghouse. The reactor vessel is surrounded and supported by a carbon steel neutron shield tank that was filled with chromated water during plant operation. A 5-ft-thick concrete biological shield wall surrounds the neutron shield tank. A project is under way to remove the reactor vessel internals from the reactor vessel.

Heider, K.J.; Morrissey, K.J. (Yankee Atomic Electric Co., Bolton, MA (United States))

1993-01-01T23:59:59.000Z

57

Advances and Trends of Bionic Underwater Propulsors  

Science Conference Proceedings (OSTI)

In recent twenty years, tens of the bionic underwater prototype propulsors which imitate aquatic animals have been invented. The bionic principles hand classification of bionic propulsors were presented firstly. The main advance of the bionic propulsors ... Keywords: Bionic underwater propulsor, fish robot, undulation fin, neural control, underwater vehicle

Daibing Zhang; K. H. Low; Haibin Xie; Lincheng Shen

2009-05-01T23:59:59.000Z

58

Reliability of underwater hearing thresholds in pinnipeds  

E-Print Network (OSTI)

Reliability of underwater hearing thresholds in pinnipeds Brandon L. Southall Long Marine@ucsc.edu Abstract: Repeated measures of low-frequency underwater hearing sensi- tivity in individuals of three and certain testing parameters (e.g., equipment and research personnel), measured underwater hearing

Reichmuth, Colleen

59

Underwater Vehicles for Deep Ocean Exploration  

E-Print Network (OSTI)

1 Underwater Vehicles for Deep Ocean Exploration Louis L. Whitcomb Ph.D. Associate Professor Kaohsiung, Taiwan, R.O.C. March 8, 2003 Outline · Introduction to Underwater Robotics · Johns Hopkins University Research Vehicle: JHU ROV · Research in Underwater Vehicle Navigation: ­ DVLNAV Navigation Program

Whitcomb, Louis L.

60

UNDERWATER PAINT MARKING OF PORPOISES1  

E-Print Network (OSTI)

UNDERWATER PAINT MARKING OF PORPOISES1 Identification of individual animals has always been underwater. Applica- tion of these paints was easiest by pressurized spray. We experimented with spray. Paint bounced off most hard-surface materials before it could set underwater, unlike human or porpoise

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

An overview of the internet of underwater things  

Science Conference Proceedings (OSTI)

Approximately 71% of the Earth's surface is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas. Ocean temperatures determine climate and wind patterns that affect life on land. Freshwater ... Keywords: Applications, Architecture, Internet of underwater things, Research challenges

Mari Carmen Domingo

2012-11-01T23:59:59.000Z

62

Data muling over underwater wireless sensor networks using an autonomus underwater vehicle  

E-Print Network (OSTI)

Abstract — We present algorithms, systems, and experimental results for underwater data muling. In data muling a mobile agent interacts with static agents to upload, download, or transport data to a different physical location. We consider a system comprising an Autonomous Underwater Vehicle (AUV) and many static Underwater Sensor Nodes (USN) networked together optically and acoustically. The AUV can locate the static nodes using vision and hover above the static nodes for data upload. We describe the hardware and software architecture of this underwater system, as well as experimental data. Index Terms — Underwater sensor networks, AUV, visionbased navigation, underwater robotics.

Matthew Dunbabin; Peter Corke; Iuliu Vasilescu; Daniela Rus

2006-01-01T23:59:59.000Z

63

NEMO: A Project for a km$^3$ Underwater Detector for Astrophysical Neutrinos in the Mediterranean Sea  

E-Print Network (OSTI)

The status of the project is described: the activity on long term characterization of water optical and oceanographic parameters at the Capo Passero site candidate for the Mediterranean km$^3$ neutrino telescope; the feasibility study; the physics performances and underwater technology for the km$^3$; the activity on NEMO Phase 1, a technological demonstrator that has been deployed at 2000 m depth 25 km offshore Catania; the realization of an underwater infrastructure at 3500 m depth at the candidate site (NEMO Phase 2).

I. Amore; for the NEMO Collaboration

2007-09-25T23:59:59.000Z

64

Trajectory Design and Implementation for Multiple Autonomous Underwater Vehicles Based on Ocean Model Predictions  

E-Print Network (OSTI)

for Multiple Autonomous Underwater Vehicles Based on OceanAUVs) • Autonomous Underwater Vehicles Evolving ocean

2009-01-01T23:59:59.000Z

65

Applications of Underwater Technology on Underwater Archaeology:The Search for Underwater Cultural Heritage in Peng-Hu Sea Area.  

E-Print Network (OSTI)

??The purpose of this paper is to investigate the survey strategy for marine archaeology using modern underwater survey and identification instruments and techniques on Peng-Hu… (more)

Chen, Wei-Cheng

2010-01-01T23:59:59.000Z

66

Experiments with Cooperative Control of Underwater Robots  

E-Print Network (OSTI)

In this paper we describe cooperative control algorithms for robots and sensor nodes in an underwater environment. Cooperative navigation is defined as the ability of a coupled system of autonomous robots to pool their resources to achieve long-distance navigation and a larger controllability space. Other types of useful cooperation in underwater environments include: exchange of information such as data download and retasking; cooperative localization and tracking; and physical connection (docking) for tasks such as deployment of underwater sensor networks, collection of nodes, and rescue of damaged robots. We present experimental results obtained with an underwater system that consists of two very different robots and a number of sensor network modules. We present the hardware and software architecture of this underwater system. We then describe various interactions between the robots and sensor nodes and between the two robots, including cooperative navigation. Finally, we describe our experiments with this underwater system and present data. 1

Matthew Dunbabin; Iuliu Vasilescu; Peter Corke; Daniela Rus

2008-01-01T23:59:59.000Z

67

Using optical communication for remote underwater robot operation  

E-Print Network (OSTI)

Underwater vehicles are typically operated using a tether or a slow acoustic link. We present an underwater optical communication system that enables a high-throughput and low-latency link to an underwater robot. The optical ...

Doniec, Marek Wojciech

68

Underwater Visual Acuity of Florida Manatees (Trichechus manatus latirostris)  

E-Print Network (OSTI)

equivalent aerial and underwater diurnal acuity. Science,S. , & Blue, J. (1999). The underwater audiogram of the WestR. F. (1971). Aerial and underwater visual acuity in the

Bauer, Gordon B.; Colbert, Debborah E.; Gaspard III, Joseph C.; Littlefield, Brandie; Fellner, Wendi

2003-01-01T23:59:59.000Z

69

Blue whale response to underwater noise from commercial ships  

E-Print Network (OSTI)

D. , 1976. Mechanics of Underwater Noise. Pergamon PressD. , 1993. On ocean underwater ambient noise. AcousticsRichmond, M.E. , 2005. Underwater, low- frequency noise in a

McKenna, Megan Frances

2011-01-01T23:59:59.000Z

70

SPARSE UNDERWATER ACOUSTIC IMAGING: A CASE STUDY Nikolaos Stefanakis  

E-Print Network (OSTI)

SPARSE UNDERWATER ACOUSTIC IMAGING: A CASE STUDY Nikolaos Stefanakis , Jacques Marchal , Valentin de Beaulieu 35042 Rennes Cedex, France ABSTRACT Underwater acoustic imaging is traditionally 3D underwater imaging using a newly built flexible-configuration sonar device. The computational

Paris-Sud XI, Université de

71

Design and implementation of an underwater sound recording device  

SciTech Connect

To monitor the underwater sound and pressure waves generated by activities such as underwater blasting and pile driving, an autonomous system used to record underwater acoustic signals was designed. The device designed allows two hydrophones or other dynamic pressure sensors to be connected, filters out high frequency noise, has a gain that can be independently set for each sensor, and allows two hours of data to be collected. Two versions of the USR were created; one is submersible to a maximum depth of 300 m, and the other, although watertight, is not intended to be fully submersed. Tests were performed in the laboratory using a data acquisition system to send single-frequency sinusoidal voltages directly to the each component. These tests verified that the device performs as well as larger commercially available data acquisition systems, which are not suited for field use. A prototype of the device was used in a case study to investigate the effect of underwater rock blasting on juvenile Chinook salmon and rainbow trout. The case study demonstrated that the device was able to tolerate being operated in harsh environments, making it a valuable tool for collecting field measurements.

Martinez, Jayson J.; Myers, Joshua R.; Carlson, Thomas J.; Deng, Zhiqun; Rohrer, John S.; Caviggia, Kurt A.; Woodley, Christa M.; Weiland, Mark A.

2011-09-01T23:59:59.000Z

72

Implementation of a wireless underwater video link  

E-Print Network (OSTI)

Autonomous underwater vehicles (AUVs) are increasingly being considered for remotely supervised missions, primarily for routine subsea inspection tasks currently performed by tethered remotely operated vehicles (ROVs). ...

Morash, James Paul

2008-01-01T23:59:59.000Z

73

Underwater Acoustic Sensor Networks: Research Challenges  

E-Print Network (OSTI)

Underwater sensor nodes will find applications in oceanographic data collection, pollution monitoring, o#shore exploration, disaster prevention, assisted navigation and tactical surveillance applications. Moreover, unmanned or autonomous underwater vehicles (UUVs, AUVs), equipped with sensors, will enable the exploration of natural undersea resources and gathering of scientific data in collaborative monitoring missions. Underwater acoustic networking is the enabling technology for these applications. Underwater networks consist of a variable number of sensors and vehicles that are deployed to perform collaborative monitoring tasks over a given area.

Ian Akyildiz Dario; Ian F. Akyildiz; Dario Pompili; Tommaso Melodia

2005-01-01T23:59:59.000Z

74

Underwater Acoustic Sensor Networks: Research Challenges  

E-Print Network (OSTI)

Underwater sensor nodes will find applications in oceanographic data collection, pollution monitoring, o#shore exploration, disaster prevention, assisted navigation and tactical surveillance applications. Moreover, unmanned or autonomous underwater vehicles (UUVs, AUVs), equipped with sensors, will enable the exploration of natural undersea resources and gathering of scientific data in collaborative monitoring missions. Underwater acoustic networking is the enabling technology for these applications. Underwater networks consist of a variable number of sensors and vehicles that are deployed to perform collaborative monitoring tasks over a given area. In this

Ian F. Akyildiz; Dario Pompili; Tommaso Melodia

2005-01-01T23:59:59.000Z

75

Time synchronization for underwater acoustic sensor networks.  

E-Print Network (OSTI)

??The unique properties of underwater acoustic communications, such as large and time-varying propagation, low and range dependent bandwidth, and adverse operating environment make the synchronization… (more)

Khandoker, Tarik-Ul Islam

2012-01-01T23:59:59.000Z

76

Underwater survival story presents physics puzzle  

NLE Websites -- All DOE Office Websites (Extended Search)

0213sea 07022013 High Resolution Image LLNL physicist Maxim Umansky recently performed a physics analysis of an underwater survival story off the Nigerian coast. Umansky, an...

77

Underwater Sensor Network (UWSN) LabUnderwater Sensor Network (UWSN) Lab AquaAqua--fModemfModem: A Stand: A Stand--alone Underwateralone Underwater  

E-Print Network (OSTI)

Underwater Sensor Network (UWSN) LabUnderwater Sensor Network (UWSN) Lab AquaAqua--fModemfModem: A Stand: A Stand--alone Underwateralone Underwater Acoustic Modem Based on OFDM TechnologyAcoustic ModemUniversity of Connecticut OFDM is one appealing solution for highOFDM is one appealing solution for high--rate underwater

Zhou, Shengli

78

State Estimation Strategies for Autonomous Underwater Vehicle Fish Tracking Applications.  

E-Print Network (OSTI)

??As the largest unexplored area on earth, the underwater world has unlimited at traction to marine scientists. Due to the complexity of the underwater environment… (more)

Zhou, Jun Jay

2008-01-01T23:59:59.000Z

79

Intelligent deployment strategies for passive underwater sensor networks.  

E-Print Network (OSTI)

??Passive underwater sensor networks are often used to monitor a general area of the ocean, a port or military installation, or to detect underwater vehicles… (more)

Golen, Erik; Yuan, B; Shenoy, N

2009-01-01T23:59:59.000Z

80

Design of small, low-cost, underwater fin manipulator.  

E-Print Network (OSTI)

??This thesis details the development of a small, low cost, underwater manipulator for use on the XAUV. At this time, there are no cheap underwater… (more)

Roberts, Megan Johnson

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Dispersive waves generated by an underwater landslide  

E-Print Network (OSTI)

In this work we study the generation of water waves by an underwater sliding mass. The wave dynamics are assumed to fell into the shallow water regime. However, the characteristic wavelength of the free surface motion is generally smaller than in geophysically generated tsunamis. Thus, dispersive effects need to be taken into account. In the present study the fluid layer is modeled by the Peregrine system modified appropriately and written in conservative variables. The landslide is assumed to be a quasi-deformable body of mass whose trajectory is completely determined by its barycenter motion. A differential equation modeling the landslide motion along a curvilinear bottom is obtained by projecting all the forces acting on the submerged body onto a local moving coordinate system. One of the main novelties of our approach consists in taking into account curvature effects of the sea bed.

Dutykh, Denys; Beysel, Sonya; Shokina, Nina; Khakimzyanov, Gayaz

2011-01-01T23:59:59.000Z

82

Cooperative Localization for Autonomous Underwater Vehicles  

Science Conference Proceedings (OSTI)

This paper describes an algorithm for distributed acoustic navigation for Autonomous Underwater Vehicles (AUVs). Whereas typical AUV navigation systems utilize pre-calibrated arrays of static transponders, our work seeks to create a fully mobile network ... Keywords: autonomous underwater vehicles, cooperative navigation, mobile robotics, sensor networks

Alexander Bahr; John J. Leonard; Maurice F. Fallon

2009-06-01T23:59:59.000Z

83

Underwater radiation detector  

DOE Patents (OSTI)

A detector apparatus for differentiating between gamma and neutron radiation is provided. The detector includes a pair of differentially shielded Geiger-Mueller tubes. The first tube is wrapped in silver foil and the second tube is wrapped in lead foil. Both the silver and lead foils allow the passage of gamma rays at a constant rate in a gamma ray only field. When neutrons are present, however, the silver activates and emits beta radiation that is also detected by the silver wrapped Geiger-Mueller tube while the radiation detected by the lead wrapped Geiger-Mueller tube remains constant. The amount of radiation impinging on the separate Geiger-Mueller tubes is then correlated in order to distinguish between the neutron and gamma radiations.

Kruse, Lyle W. (Albuquerque, NM); McKnight, Richard P. (Albuquerque, NM)

1986-01-01T23:59:59.000Z

84

Underwater Localization in Sparse 3D Acoustic Sensor Networks  

E-Print Network (OSTI)

Underwater Localization in Sparse 3D Acoustic Sensor Networks Wei Cheng1,2, Amin Y. Teymorian the localization problem in sparse 3D underwater sensor networks. Considering the fact that depth information is typically available for underwater sensors, we transform the 3D underwater positioning problem into its two

Cheng, Xiuzhen "Susan"

85

Platform effects on optical variability and prediction of underwater visibility  

E-Print Network (OSTI)

Platform effects on optical variability and prediction of underwater visibility Grace Chang,1, specifically the breakdown of stratification from mixing by the hull of R/P FLIP. Modeled underwater radiance Successful, rapid identification of underwater tar- gets and accurate underwater imaging are critical

You, Yu

86

Underwater Vehicles hal-00733797,version1-19Sep2012  

E-Print Network (OSTI)

Underwater Vehicles hal-00733797,version1-19Sep2012 Author manuscript, published in "Underwater Vehicles (2009) 525-538" #12;hal-00733797,version1-19Sep2012 #12;Underwater Vehicles Edited by Alexander V from: publication@intechweb.org First published January 2009 Printed in Croatia Underwater Vehicles

Paris-Sud XI, Université de

87

Automatic Underwater Image Pre-Processing Stephane Bazeille(1)  

E-Print Network (OSTI)

Automatic Underwater Image Pre-Processing St´ephane Bazeille(1) , Isabelle Quidu(1) , Luc Jaulin(1 Cedex 9 FRANCE (2) Thales Underwater Systems S.A S. Route de Sainte Anne du Portzic Site Amiral Nomy CS for underwater image restoration. Because of specific transmission properties of light in the water, underwater

Paris-Sud XI, Université de

88

Underwater Augmented Reality Game using the DOLPHYN Abdelkader Bellarbi2  

E-Print Network (OSTI)

Underwater Augmented Reality Game using the DOLPHYN Abdelkader Bellarbi2 , Christophe Domingues1 technologies. With the extension of Internet to underwater applications, the innovative character, such as the mouse, to underwater uses [1]. The Dolphyn is an underwater-computerized display system with various

Paris-Sud XI, Université de

89

Strongly coupled copper plasma generated by underwater electrical wire explosion  

Science Conference Proceedings (OSTI)

A number of theoretical approaches to the analysis of the parameters of a discharge channel consisting of strongly coupled plasma generated in the process of underwater electrical wire explosion are presented. The analysis is based on experimental results obtained from discharges employing Cu wire. The obtained experimental data included electrical measurements and optical observations from which information about the dynamics of the water flow was extrapolated. Numerical calculation based on a 1D magnetohydrodynamic model was used to simulate the process of underwater wire explosion. A wide range conductivity model was applied in this calculation and good agreement with a set of experimental data was obtained. A method of determining the average temperature of the discharge channel based on this model and experimental results is proposed, and the limits of this method's applicability are discussed.

Grinenko, A.; Gurovich, V.Tz.; Saypin, A.; Efimov, S.; Krasik, Ya.E.; Oreshkin, V.I. [Physics Department, Technion, 32000 Haifa (Israel); Institute of High Current Electronics, SB RAN, 634055 Tomsk (Russian Federation)

2005-12-15T23:59:59.000Z

90

Special Issue "Underwater Sensor Nodes and Underwater Sensor Networks" A special issue of Sensors (ISSN 1424-8220)  

E-Print Network (OSTI)

Special Issue "Underwater Sensor Nodes and Underwater Sensor Networks" A special issue of Sensors (ISSN 1424-8220) Website: http://www.mdpi.com/journal/sensors/special_issues/underwater_sens Journal prediction, oil monitoring and so on. This special issue tries to collect the recent advances on underwater

Chen, Min

91

Design of a low-cost underwater acoustic modem for short- range sensor networks  

E-Print Network (OSTI)

of Optical Waves Underwater . . . . . . . 3.2.2 ExistingChapter 4 Existing Underwater Acoustic Modems 4.1 CommercialControl Structure of Symbol Synchronization for Underwater

Benson, Bridget

2010-01-01T23:59:59.000Z

92

Upper ocean processes observed by underwater gliders in the California Current System  

E-Print Network (OSTI)

region using autonomous underwater gliders during fall of73 Chapter 4 Underwater gliders reveal rapid arrivaland M. D. Ohman (2011), Underwater gliders reveal rapid

Todd, Robert E.

2011-01-01T23:59:59.000Z

93

Fish Detection in Underwater Video of Benthic Habitats in Virgin Islands.  

E-Print Network (OSTI)

??The research of underwater creatures is a fascinating work to marine biologists and environmental experts. However, finding and segmenting underwater creatures in underwater images and… (more)

Wu, Nan

2012-01-01T23:59:59.000Z

94

RELIABILITY CONSIDERATIONS OF ELECTRONICS COMPONENTS FOR THE DEEP UNDERWATER MUON AND NEUTRINO DETECTION SYSTEM  

E-Print Network (OSTI)

Considerations for the Dtep Underwater Muon and NeutrinoPresented at the Deep Underwater Huon and Neutrino DetectionCOMPONENTS FOR THE DEEP UNDERWATER MUON AND NEUTRINO

Leskovar, B.

2010-01-01T23:59:59.000Z

95

Underwater Mirror Exposure to Free-Ranging Naïve Atlantic Spotted Dolphins (Stenella frontalis) in the Bahamas  

E-Print Network (OSTI)

Vocalizations and associated underwater behavior of free-Comparative Psychology Underwater Mirror Exposure to Free-frontalis) has been studied underwater in the Bahamas. We

Delfour, Fabienne; Herzing, Denise

2013-01-01T23:59:59.000Z

96

Spectrally efficient underwater acoustic communications : channel characterization and design aspects for OFDM  

E-Print Network (OSTI)

with L = 9 for an underwater channel impulse response with Ladaptive modulation in underwater acoustic communications,”Adaptive OFDM for underwater acoustic channels with limited

Radoševi?, Andreja

2012-01-01T23:59:59.000Z

97

PHOTOMULTIPLIER CHARACTERISTICS CONSIDERATIONS FOR THE DEEP UNDERWATER MUON AND NEUTRINO DETECTION SYSTEM  

E-Print Network (OSTI)

Presented at the Deep Underwater Huon and Neutrino DetectionCONSIDERATIONS FOR THE DEEP UNDERWATER HUON AND NEUTRINOPresented at the Deep Underwater Huon and Neutrino Detection

Leskovar, B.

2010-01-01T23:59:59.000Z

98

Recovery of underwater visibility and structure by polarization analysis  

E-Print Network (OSTI)

Abstract—Underwater imaging is important for scientific research and technology as well as for popular activities, yet it is plagued by poor visibility conditions. In this paper, we present a computer vision approach that removes degradation effects in underwater vision. We analyze the physical effects of visibility degradation. It is shown that the main degradation effects can be associated with partial polarization of light. Then, an algorithm is presented, which inverts the image formation process for recovering good visibility in images of scenes. The algorithm is based on a couple of images taken through a polarizer at different orientations. As a by-product, a distance map of the scene is also derived. In addition, this paper analyzes the noise sensitivity of the recovery. We successfully demonstrated our approach in experiments conducted in the sea. Great improvements of scene contrast and color correction were obtained, nearly doubling the

Yoav Y. Schechner; Nir Karpel

2005-01-01T23:59:59.000Z

99

Prompt muon contribution to the flux underwater  

E-Print Network (OSTI)

We present high energy spectra and zenith-angle distributions of the atmospheric muons computed for the depths of the locations of the underwater neutrino telescopes. We compare the calculations with the data obtained in the Baikal and the AMANDA muon experiments. The prompt muon contribution to the muon flux underwater due to recent perturbative QCD-based models of the charm production is expected to be observable at depths of the large underwater neutrino telescopes. This appears to be probable even at rather shallow depths (1-2 km), provided that the energy threshold for muon detection is raised above $\\sim 100$ TeV.

T. S. Sinegovskaya; S. I. Sinegovsky

2000-07-21T23:59:59.000Z

100

Designing a wireless underwater optical communication system  

E-Print Network (OSTI)

Though acoustic modems have long been the default wireless communication method for underwater applications due to their long range, the need for high speed communication has prompted the exploration of non-acoustic methods ...

Brundage, Heather

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Cooperative localization for autonomous underwater vehicles  

E-Print Network (OSTI)

Self-localization of an underwater vehicle is particularly challenging due to the absence of Global Positioning System (GPS) reception or features at known positions that could otherwise have been used for position ...

Bahr, Alexander

2009-01-01T23:59:59.000Z

102

MECHANICS AND NONLINEAR CONTROL: MAKING UNDERWATER VEHICLES  

E-Print Network (OSTI)

MECHANICS AND NONLINEAR CONTROL: MAKING UNDERWATER VEHICLES RIDE AND GLIDE Naomi Ehrich Leonard \\Lambda \\Lambda Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544 naomi@princeton.edu Abstract: Methods from geometric mechanics and dynamical systems theory make

Leonard, Naomi

103

Development of tether mooring type underwater robot  

Science Conference Proceedings (OSTI)

For the purpose of detecting CO2 leaks during ocean CO2 sequestration, there is a need for independent underwater robots that can make observations while maintaining their position over the seabed against the current for long periods ...

Ya-Wen Huang; Koji Ueda; Kazuhiro Itoh; Edwardo F. Fukushima; Shigeo Hirose

2009-10-01T23:59:59.000Z

104

Turbulence Measurement from an Autonomous Underwater Vehicle  

Science Conference Proceedings (OSTI)

Horizontal profiles of the microstructure of velocity and temperature were obtained with a large autonomous underwater vehicle (AUV) using two piezoelectric shear probes, an FP07 thermistor, and three orthogonal accelerometers mounted on a sting ...

Edward R. Levine; Rolf G. Lueck

1999-11-01T23:59:59.000Z

105

Underwater Camera Calibration Using Wavelength Triangulation  

Science Conference Proceedings (OSTI)

In underwater imagery, the image formation process includes refractions that occur when light passes from water into the camera housing, typically through a flat glass port. We extend the existing work on physical refraction models by considering the ...

Timothy Yau, Minglun Gong, Yee-Hong Yang

2013-06-01T23:59:59.000Z

106

Vertical Water Velocities from Underwater Gliders  

Science Conference Proceedings (OSTI)

The underwater glider is set to become an important platform for oceanographers to gather data within oceans. Gliders are usually equipped with a conductivity–temperature–depth (CTD) sensor, but a wide range of other sensors have been fitted to ...

Lucas Merckelbach; David Smeed; Gwyn Griffiths

2010-03-01T23:59:59.000Z

107

Predicting the navigation performance of underwater vehicles  

Science Conference Proceedings (OSTI)

In this paper we present a general framework for predicting the positioning uncertainty of underwater vehicles. We apply this framework to common examples from marine robotics: standalone long baseline (LBL) positioning and integrated LBL reference and ...

Brian Bingham

2009-10-01T23:59:59.000Z

108

Piezoelectric materials used in underwater acoustic transducers  

Science Conference Proceedings (OSTI)

Piezoelectric materials have been used in underwater acoustic transducers for nearly a century. In this paper, we reviewed four different types of piezoelectric materials: piezoelectric ceramics, single crystals, composites, and polymers, which are widely used in underwater acoustic transducers nowadays. Piezoelectric ceramics are the most dominant material type and are used as a single-phase material or one of the end members in composites. Piezoelectric single crystals offer outstanding electromechanical response but are limited by their manufacturing cost. Piezoelectric polymers provide excellent acoustic impedance matching and transducer fabrication flexibility although their piezoelectric properties are not as good as ceramics and single crystals. Composites combined the merits of ceramics and polymers and are receiving increased attention. The typical structure and electromechanical properties of each type of materials are introduced and discussed with respect to underwater acoustic transducer applications. Their advantages and disadvantages are summarized. Some of the critical design considerations when developing underwater acoustic transducers with these materials are also touched upon.

Li, Huidong; Deng, Zhiqun; Carlson, Thomas J.

2012-07-07T23:59:59.000Z

109

Design considerations for engineering Autonomous Underwater Vehicles  

E-Print Network (OSTI)

Autonomous Underwater Vehicles (AUVs) have been established as a viable tool for Oceanographic Sciences. Being untethered and independent, AUVs fill the gap in Ocean Exploration left by the existing manned submersible and ...

Shah, Vikrant P. (Vikrant Pankaj)

2007-01-01T23:59:59.000Z

110

Contributions to automated realtime underwater navigation  

E-Print Network (OSTI)

This dissertation presents three separate-but related-contributions to the art of underwater navigation. These methods may be used in postprocessing with a human in the loop, but the overarching goal is to enhance vehicle ...

Stanway, Michael Jordan

2012-01-01T23:59:59.000Z

111

Krill: An exploration in underwater sensor networks  

E-Print Network (OSTI)

While sensor networks have now become very popular on land, the underwater environment still poses some difficult problems. Communication is one of the difficult challenges under water. There are two options:

I Vasilescu; K Kotay; D Rus; L Overs; P Sikka; M Dunbabin; P Chen; P Corke

2005-01-01T23:59:59.000Z

112

XAUV : modular high maneuverability autonomous underwater vehicle  

E-Print Network (OSTI)

The design and construction of a modular test bed autonomous underwater vehicle (AUV) is analyzed. Although a relatively common stacked-hull design is used, the state of the art is advanced through an aggressive power ...

Walker, Daniel G. (Daniel George)

2009-01-01T23:59:59.000Z

113

Clean, economical, underwater (hydrocarbon) storage  

SciTech Connect

A consortium consisting of Howaldtswerke-Deutsche Werft A.G., Phoenix Gummiwerke A.G., Strabag Bau-A.G., and Bugsier Reederei und Bergungs-A.G. offers a plausible solution to the large-scale underwater storage of hydrocarbons. Up to 20 storage compartments of 8000 cu m capacity can be assembled for a capacity of 160,000 cu m. Each compartment is divided in half by a nylon-reinforced polyurethane diaphragm which isolates oil or other products on one side from sea-water ballast on the other side. As oil is pumped into storage on one side of the diaphragm, the diaphragm moves and ballast on the other side is displaced to the sea. Ballast re-enters the compartment during unloading. The system can enable small offshore platforms to produce more economically. Cargo tankers load at 8000 cu m/hr. The tanks will be used in 200 m or greater water depths. The loading station is installed in a buoy 30 m below the water surface.

1978-08-01T23:59:59.000Z

114

Spatiotemporal processing and time-reversal for underwater acoustic communications  

E-Print Network (OSTI)

High-rate underwater acoustic communication can be achieved using transmitter/receiver arrays. Underwater acoustic channels can be characterized as rapidly time-varying systems that suffer severe Inter Symbol Interferences ...

Wang, Daniel Y

2005-01-01T23:59:59.000Z

115

Uncertainty-driven view planning for underwater inspection  

E-Print Network (OSTI)

We discuss the problem of inspecting an underwater structure, such as a submerged ship hull, with an autonomous underwater vehicle (AUV). In such scenarios, the goal is to construct an accurate 3D model of the structure ...

Hollinger, Geoffrey A.

116

Development of a low-cost underwater manipulator.  

E-Print Network (OSTI)

??This thesis describes the design, modeling, manufacture, and testing of a low cost, multiple degree-of-freedom underwater manipulator. Current underwater robotic arm technologies are often expensive… (more)

Cooney, Lauren Alise

2006-01-01T23:59:59.000Z

117

Dissolved organic matters impact on colour reconstruction in underwater images  

Science Conference Proceedings (OSTI)

The natural properties of water column usually affect underwater imagery by suppressing high-energy light. In application such as color correction of underwater images estimation of water column parameters is crucial. Diffuse attenuation coefficients ...

J. Åhlén; D. Sundgren; T. Lindell; E. Bengtsson

2005-06-01T23:59:59.000Z

118

Underwater ultra-wideband fingerprinting-based localization.  

E-Print Network (OSTI)

??In this work a new location fingerprinting-based localization algorithm is proposed for an underwater medium by utilizing ultra-wideband (UWB) signals. In many conventional underwater systems,… (more)

Shakeri, S.

2012-01-01T23:59:59.000Z

119

Development of a low-cost underwater manipulator  

E-Print Network (OSTI)

This thesis describes the design, modeling, manufacture, and testing of a low cost, multiple degree-of-freedom underwater manipulator. Current underwater robotic arm technologies are often expensive or limited in functionality. ...

Cooney, Lauren Alise

2006-01-01T23:59:59.000Z

120

Design of small, low-cost, underwater fin manipulator  

E-Print Network (OSTI)

This thesis details the development of a small, low cost, underwater manipulator for use on the XAUV. At this time, there are no cheap underwater servos commercially available. The design involves modifying a commercially ...

Roberts, Megan Johnson

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

An Aquatic Acoustic Metrics Interface Utility for Underwater Sound Monitoring and Analysis  

SciTech Connect

Fishes and other marine mammals suffer a range of potential effects from intense sound sources generated by anthropogenic underwater processes such as pile driving, shipping, sonars, and underwater blasting. Several underwater sound recording devices (USR) were built to monitor the acoustic sound pressure waves generated by those anthropogenic underwater activities, so the relevant processing software becomes indispensable for analyzing the audio files recorded by these USRs. However, existing software packages did not meet performance and flexibility requirements. In this paper, we provide a detailed description of a new software package, named Aquatic Acoustic Metrics Interface (AAMI), which is a Graphical User Interface (GUI) designed for underwater sound monitoring and analysis. In addition to the general functions, such as loading and editing audio files recorded by USRs, the software can compute a series of acoustic metrics in physical units, monitor the sound's influence on fish hearing according to audiograms from different species of fishes and marine mammals, and batch process the sound files. The detailed applications of the software AAMI will be discussed along with several test case scenarios to illustrate its functionality.

Ren, Huiying; Halvorsen, Michele B.; Deng, Zhiqun; Carlson, Thomas J.

2012-05-31T23:59:59.000Z

122

Underwater Human-Robot Interaction via Biological Motion Identification  

E-Print Network (OSTI)

Underwater Human-Robot Interaction via Biological Motion Identification Junaed Sattar and Gregory: {junaed, dudek}@cim.mcgill.ca Abstract-- We present an algorithm for underwater robots to visually detect pertaining to biological motion. This technique is applied to track scuba divers in underwater domains

Dudek, Gregory

123

An Underwater Robotic Network for Monitoring Nuclear Waste Storage Pools  

E-Print Network (OSTI)

An Underwater Robotic Network for Monitoring Nuclear Waste Storage Pools Sarfraz Nawaz1 , Muzammil must be stored for around 60 years in underwater storage pools before permanent disposal. These underwater storage environments must be carefully monitored and controlled to avoid an environmental

Jeavons, Peter

124

An Underwater Sensor Network with Dual Communications, Sensing, and  

E-Print Network (OSTI)

An Underwater Sensor Network with Dual Communications, Sensing, and Mobility Carrick Detweiller an underwater sensor network with dual communication and sup- port for sensing and mobility. The nodes developed. We describe the hardware details of the underwater sensor node and the communication

Farritor, Shane

125

Coastal Underwater Field Observer with Remote IP Access  

E-Print Network (OSTI)

Coastal Underwater Field Observer with Remote IP Access Joe Wilinski, Aaron Ganick, Alexander with continuous use of batteries. Costal Underwater Field Observer 9/16/09 #12;Boston University Slideshow Title? Wide angle Zoom Costal Underwater Field Observer #12;Boston University Slideshow Title Goes Here

Goldberg, Bennett

126

Batoid Fishes: Inspiration for the Next Generation of Underwater Robots  

E-Print Network (OSTI)

P A P E R Batoid Fishes: Inspiration for the Next Generation of Underwater Robots A U T H O R-endurance swimming that can outperform current underwater vehicle technology in the areas of stealth, maneuverability batoid fishes an ideal platform to emulate in the design of a bio-inspired autonomous underwater vehicle

Fish, Frank

127

Integrated Short Term Navigation of a Towed Underwater Body*  

E-Print Network (OSTI)

Integrated Short Term Navigation of a Towed Underwater Body* G. Damy' M. Joannides2 F. LeGland3 M. An underwater body, to be called here- after the fish, is towed by a surface ship at the end of a few hundred cannot provide any position estimates of an underwater body such as a towed fish, but only position

LeGland, François

128

Fountain Codes and their Application to Broadcasting in Underwater Networks  

E-Print Network (OSTI)

Fountain Codes and their Application to Broadcasting in Underwater Networks: Performance Modeling aim in this paper is to study the performance of broadcasting al- gorithms for underwater acoustic to broad- casting in underwater networks. Our analysis allows us to find per- formance metrics

Rossi, Michele

129

LFT/H varying sampling control for Autonomous Underwater Vehicles  

E-Print Network (OSTI)

LFT/H varying sampling control for Autonomous Underwater Vehicles E. Roche , O. Sename D. Simon: This paper deals with the robust control of an Autonomous Underwater Vehicle (AUV) subject to communication. INTRODUCTION In this paper the H approach for LPV systems is applied to an Autonomous Underwater Vehicle (AUV

Paris-Sud XI, Université de

130

Underwater vehicles: The minimum time problem Department of Mathematics  

E-Print Network (OSTI)

Underwater vehicles: The minimum time problem M. Chyba Department of Mathematics 2565 McCarthy Mall for a class of underwater vehicles. We focus on the situation of initial and final configurations at rest In this paper we pursue the analysis of the minimum time problem for a special class of underwater vehicles, see

Sontag, Eduardo

131

A camcorder for 3D underwater reconstruction of archeological objects  

E-Print Network (OSTI)

A camcorder for 3D underwater reconstruction of archeological objects A. Meline1 , J. Triboulet1 Cedex 5, France 2 Université de Nîmes, Place Gabriele Péri, 30021 Nîmes, France Abstract- The underwater cartography has made great progress in the last decade. In this paper, we discuss of the 3D underwater

Paris-Sud XI, Université de

132

BOUSSINESQ MODELING OF SURFACE WAVES DUE TO UNDERWATER LANDSLIDES  

E-Print Network (OSTI)

BOUSSINESQ MODELING OF SURFACE WAVES DUE TO UNDERWATER LANDSLIDES DENYS DUTYKH AND HENRIK KALISCH Abstract. Consideration is given to the influence of an underwater landslide on waves at the surface distinct generation mechanisms of a tsunami are underwater earth- quakes, and submarine mass failures

133

Underwater acoustic imaging: physically-motivated sparse models  

E-Print Network (OSTI)

Underwater acoustic imaging: physically-motivated sparse models and validation on real data N hal-00677287,version1-4Jun2012 #12;Underwater acoustic imaging (UWA)hal-00677287,version1-4Jun2012 #12;Underwater acoustic imaging: direct problem Successive emission sequences, or pings, indexed by p. ep

Paris-Sud XI, Université de

134

ATTEMPTS TO GUIDE SMALL FISH WITH UNDERWATER SOUND  

E-Print Network (OSTI)

ATTEMPTS TO GUIDE SMALL FISH WITH UNDERWATER SOUND Marine Biological Laboratory NOV 9 -1953 WOODS, Director ATTEMPTS TO GUIDE SMALL FISH WITH UNDERWATER SOUND by Clifford J. Burner and Harvey Lo Moore" - Electro-magnetic transducer 6 Piezo-electric crystal transducer l8 "Wampus" - Underwater turbine 20

135

UNDERWATER TELEVISION VEHICLE FOR USE IN FISHERIES RESEARCH  

E-Print Network (OSTI)

UNDERWATER TELEVISION VEHICLE FOR USE IN FISHERIES RESEARCH (Marine Biological Laboratoiy j -. :I57 UNDERWATER TELEVISION VEHiaE FOR USE IN FISHERIES RESEARCH By R. F. Sand/""and R. L. McNeely''"* K^hief, Gear IN UMDERSFA RESEARCH 12 REFERENCES l5 LIST OF ILLUSTRATIONS Figure 1. Underwater Television Vehicle 3 2

136

Proceedings of the 11 European Conference on Underwater Acoustics  

E-Print Network (OSTI)

Proceedings of the 11 th European Conference on Underwater Acoustics INCOHERENT CHANGE DETECTION on Underwater Acoustics images. This allows performing a segmentation of the master image at the coarser stage,version1-7Sep2012 #12;Proceedings of the 11 th European Conference on Underwater Acoustics The idea

Paris-Sud XI, Université de

137

Mote-based Underwater Sensor Networks: Opportunities, Challenges, and Guidelines  

E-Print Network (OSTI)

Mote-based Underwater Sensor Networks: Opportunities, Challenges, and Guidelines Raja Jurdak (lopes@uci.edu) University of California, Irvine CA 92697 USA Abstract. Most underwater networks rely deployments of underwater sensor networks and has forced researchers to use simulations to investigate

Lopes, Cristina Videira

138

ATTEMPTS TO GUIDE SMALL FISH WITH UNDERWATER SOUND  

E-Print Network (OSTI)

403 ATTEMPTS TO GUIDE SMALL FISH WITH UNDERWATER SOUND -iD^ SPECIAL SCIENTIFK REPOKT-FISHERIES Na ATTEMPTS TO GUIDE SMALL FISH WITH UNDERWATER SOUND by Clifford J. Burner and Harvey L.. Moore United States-electric crystal transducer "Wampus" - Underwater turbine Electromagnetic transducer. Bell (lK-2) Summary

139

Underwater locomotion from oscillatory shape deformations Patricio A. Vela  

E-Print Network (OSTI)

Underwater locomotion from oscillatory shape deformations Patricio A. Vela , Kristi A. Morgansen@robotics.caltech.edu Abstract: This paper considers underwater propulsion that is generated by variations in body shape. We underwater vehicles that propel and steer themselves by changes in shape (e.g. [11, 13, 15

Sontag, Eduardo

140

Underwater Sensor Networking: Research Challenges and Potential Applications  

E-Print Network (OSTI)

Underwater Sensor Networking: Research Challenges and Potential Applications USC/ISI Technical, and underwater robotics. We identify research directions in short-range acoustic communications, MAC, time in applications today on the ground, underwater operations remain quite limited by comparison. Remotely controlled

Heidemann, John

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

BOUSSINESQ MODELING OF SURFACE WAVES DUE TO UNDERWATER LANDSLIDES  

E-Print Network (OSTI)

BOUSSINESQ MODELING OF SURFACE WAVES DUE TO UNDERWATER LANDSLIDES DENYS DUTYKH # AND HENRIK KALISCH Abstract. Consideration is given to the influence of an underwater landslide on waves at the surface of a tsunami are underwater earth­ quakes, and submarine mass failures. Among the broad class of submarine mass

142

BOUSSINESQ MODELING OF SURFACE WAVES DUE TO UNDERWATER LANDSLIDES  

E-Print Network (OSTI)

BOUSSINESQ MODELING OF SURFACE WAVES DUE TO UNDERWATER LANDSLIDES DENYS DUTYKH AND HENRIK KALISCH Abstract. Consideration is given to the influence of an underwater landslide on waves at the surface tsunamis. Two distinct generation mechanisms of a tsunami are underwater earthquakes, and submarine mass

143

An Underwater Network Testbed: Design, Implementation and Measurement  

E-Print Network (OSTI)

An Underwater Network Testbed: Design, Implementation and Measurement Zheng Peng, Jun-Hong Cui-Lab, an underwater acoustic sensor network lab testbed. Aqua-Lab consists of a water tank, a set of acoustic algorithms and protocols designed for underwater sensor networks. Categories and Subject Descriptors C.2.m

Wang, Bing

144

Underwater Color Constancy : Enhancement of Automatic Live Fish Recognition  

E-Print Network (OSTI)

Underwater Color Constancy : Enhancement of Automatic Live Fish Recognition M. Chambah, D. Semani-mail: rizzi@dti.unimi.it ABSTRACT We present in this paper some advances in color restoration of underwater images, especially with regard to the strong and non uniform color cast which is typical of underwater

Paris-Sud XI, Université de

145

Underwater vehicles: The minimum time problem Department of Mathematics  

E-Print Network (OSTI)

Underwater vehicles: The minimum time problem M. Chyba Department of Mathematics 2565 McCarthy Mall for a class of underwater vehicles. We focus on the situation of initial and final configurations at rest the analysis of the minimum time problem for a special class of underwater vehicles, see [5], [6] for previous

Sussmann, Hector

146

An algebraic perspective to single-transponder underwater navigation  

E-Print Network (OSTI)

An algebraic perspective to single-transponder underwater navigation J´er^ome Jouffroy and Johann Reger Abstract-- This paper studies the position estimation of an underwater vehicle using a single are presented to illus- trate the approach. I. INTRODUCTION As an underwater counterpart of GPS, Long Base

Knobloch,Jürgen

147

Underwater Acoustic Networks: Channel Models and Network Coding based Lower Bound to Transmission Power for Multicast  

E-Print Network (OSTI)

The goal of this paper is two-fold. First, to establish a tractable model for the underwater acoustic channel useful for network optimization in terms of convexity. Second, to propose a network coding based lower bound for transmission power in underwater acoustic networks, and compare this bound to the performance of several network layer schemes. The underwater acoustic channel is characterized by a path loss that depends strongly on transmission distance and signal frequency. The exact relationship among power, transmission band, distance and capacity for the Gaussian noise scenario is a complicated one. We provide a closed-form approximate model for 1) transmission power and 2) optimal frequency band to use, as functions of distance and capacity. The model is obtained through numerical evaluation of analytical results that take into account physical models of acoustic propagation loss and ambient noise. Network coding is applied to determine a lower bound to transmission power for a multicast scenario, fo...

Lucani, Daniel E; Stojanovic, Milica

2008-01-01T23:59:59.000Z

148

WILEY WCMC SPECIAL ISSUE ON UNDERWATER SENSOR NETWORKS (INVITED) 1 Prospects and Problems of Wireless Communication for Underwater  

E-Print Network (OSTI)

WILEY WCMC SPECIAL ISSUE ON UNDERWATER SENSOR NETWORKS (INVITED) 1 Prospects and Problems of Wireless Communication for Underwater Sensor Networkss Lanbo Liu, Shengli Zhou, and Jun-Hong Cui The work ISSUE ON UNDERWATER SENSOR NETWORKS (INVITED) 2 Abstract This paper reviews the physical fundamentals

Cui, Jun-Hong

149

Copyright Journal of Ocean Technology 2009 Underwater Intervention, Vol. 4, No. 1, 2009 7 Autonomous Underwater Gliders (AUGs) are  

E-Print Network (OSTI)

Copyright Journal of Ocean Technology 2009 Underwater Intervention, Vol. 4, No. 1, 2009 7 Autonomous Underwater Gliders (AUGs) are becoming the tool of choice for oceanographers to collect in of Ocean Gliders A glider is a type of autonomous underwater vehicle (AUV) that is able to move for weeks

deYoung, Brad

150

Remotely operated submersible underwater suction apparatus  

DOE Patents (OSTI)

A completely submersible, remotely operated underwater suction device for collection of irradiated materials in a nuclear pool is disclosed. The device includes a pump means for pumping water through the device, a filter means for capturing irradiated debris, remotely operated releasable connector means, a collection means and a means for remotely maneuvering the collection means. The components of the suction device may be changed and replaced underwater to take advantage of the excellent radiation shielding ability of water to thereby minimize exposure of personnel to radiation.

Kristan, Louis L. (2111 Brentwood Dr., Idaho Falls, ID 83402)

1990-01-01T23:59:59.000Z

151

Oceanic Rainfall Detection and Classification in Tropical and Subtropical Mesoscale Convective Systems Using Underwater Acoustic Methods  

Science Conference Proceedings (OSTI)

Measurements of the underwater sound produced by rain were made at three U.S. coastal sites in a study to determine the feasibility and limitations of the acoustic detection and classification of rainfall over water. In the analysis of the rain ...

Peter G. Black; John R. Proni; John C. Wilkerson; Christopher E. Samsury

1997-09-01T23:59:59.000Z

152

Wireless Sensor Networks for Underwater Localization: A Survey  

E-Print Network (OSTI)

Autonomous Underwater Vehicles (AUVs) have widely deployed in marine investigation and ocean exploration in recent years. As the fundamental information, their position information is not only for data validity but also for many real-world applications. Therefore, it is critical for the AUV to have the underwater localization capability. This report is mainly devoted to outline the recent advancement of Wireless Sensor Networks (WSN) based underwater localization. Several classic architectures designed for Underwater Acoustic Sensor Network (UASN) are briefly introduced. Acoustic propagation and channel models are described and several ranging techniques are then explained. Many state-of-the-art underwater localization algorithms are introduced, followed by the outline of some

Sen Wang; Huosheng Hu

2012-01-01T23:59:59.000Z

153

CX-008459: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination Autonomous Underwater Inspection Using Three Dimensional Laser CX(s) Applied: B3.6 Date: 06152012 Location(s): Florida Offices(s): National Energy...

154

CX-008456: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination Autonomous Underwater Inspection Using Three Dimensional Laser CX(s) Applied: B3.6 Date: 06152012 Location(s): Florida Offices(s): National Energy...

155

Development of Underwater Laser Cladding and Underwater Laser Seal Welding Techniques for Reactor Components (II)  

SciTech Connect

Stress corrosion cracking (SCC) is one of the major reasons to reduce the reliability of aged reactor components. Toshiba has been developing underwater laser welding onto surface of the aged components as maintenance and repair techniques. Because most of the reactor internal components to apply this underwater laser welding technique have 3-dimensional shape, effect of welding positions and welded shapes are examined and presented in this report. (authors)

Masataka Tamura; Shohei Kawano; Wataru Kouno; Yasushi Kanazawa [Toshiba Corporation (Japan)

2006-07-01T23:59:59.000Z

156

Challenges for Efficient Communication in Underwater Acoustic Sensor Networks  

E-Print Network (OSTI)

Abstract — Ocean bottom sensor nodes can be used for oceanographic data collection, pollution monitoring, offshore exploration and tactical surveillance applications. Moreover, Unmanned or Autonomous Underwater Vehicles (UUVs, AUVs), equipped with sensors, will find application in exploration of natural undersea resources and gathering of scientific data in collaborative monitoring missions. Underwater acoustic networking is the enabling technology for these applications. Underwater Networks consist of a variable number of sensors and vehicles that are deployed to perform collaborative monitoring tasks over a given area. In this paper, several fundamental key aspects of underwater acoustic communications are investigated. Different architectures for two-dimensional and three-dimensional underwater sensor networks are discussed, and the underwater channel is characterized. The main challenges for the development of efficient networking solutions posed by the underwater environment are detailed at all layers of the protocol stack. Furthermore, open research issues are discussed and possible solution approaches are outlined. I.

Ian F. Akyildiz; Dario Pompili; Tommaso Melodia

2004-01-01T23:59:59.000Z

157

Applications of Underwater Search and Identification Technology on Monitoring of Underwater Structures and Analysis of Upper-Layer Geological Properties of Seabed.  

E-Print Network (OSTI)

??The application of underwater search and identification technology has been widely used in the underwater engineering. There are two major fields in this thesis: monitoring… (more)

Yeh, Ti-ting

2005-01-01T23:59:59.000Z

158

Software Modems for Underwater Sensor Networks  

E-Print Network (OSTI)

Abstract — The prohibitive monetary cost and high power consumption of existing acoustic hardware represent an obstacle for underwater sensor network deployment efforts. To address this issue, we propose underwater networks that rely on widely available speakers and microphones in electronic devices, coupled with software modems, to establish acoustic communication links. In this paper, we analytically and empirically explore the potential of this acoustic communication system for the underwater environment with a generic PC microphone as a receiver and with the Tmote Invent sensor module speaker as a transmitter. After waterproofing the components with elastic membranes that provide suitable coupling with the water, our experiments profile the hardware communication capability in a controlled aquatic environment. The medium profiling results expose the favorable frequencies of operation for the hardware, enabling us to design a software FSK modem. The experiments to evaluate the data transfer capability of our 8-frequency FSK software modem in the underwater channel yield an error-free channel capacity of 24 bps, and they also demonstrate that the system supports data rates up to at least 48 bps within a transmission range of 17 m. I.

Raja Jurdak; Pedro Aguiar; Pierre Baldi; Cristina Videira Lopes

2007-01-01T23:59:59.000Z

159

KE Basin underwater visual fuel survey  

SciTech Connect

Results of an underwater video fuel survey in KE Basin using a high resolution camera system are presented. Quantitative and qualitative information on fuel degradation are given, and estimates of the total fraction of ruptured fuel elements are provided. Representative photographic illustrations showing the range of fuel conditions observed in the survey are included.

Pitner, A.L.

1995-02-01T23:59:59.000Z

160

Results of the first two seasons of underwater surveys at Episkopi Bay and Akrotiri, Cyprus  

E-Print Network (OSTI)

During the summers of 2003 and 2004, a small team of graduate students initiated an underwater archaeological survey off the coast of Cyprus as part of the University of Cincinnati excavations at Episkopi-Bamboula. With the support of the Institute of Nautical Archaeology (INA) at Texas A&M University and RPM Nautical Foundation, the project explored the seabed south and west of the Akrotiri Peninsula at Episkopi Bay. The overall aim of this ongoing diachronic survey is to determine the extent and nature of maritime contacts at Episkopi-Bamboula and its Greco-Roman successor, Kourion, from the Bronze Age through the Byzantine period. Efforts during these first two seasons concentrated on simple visual inspection of several promising areas near dangerous cliffs, offshore rocks and shallow reefs, as well as potential harbors and anchorages. The team recorded substantial pottery and anchor assemblages at Dreamer?s Bay, Cape Zevgari, and Avdimou Bay, including at least three shipwreck sites. Throughout the area, amphoras and anchors attest to varying levels of maritime activity over the past three millennia.The underwater material record reveals a modest level of Classical trade, followed by a respectable increase during the Hellenistic era. While very little material thus far can be attributed to the earlier Imperial centuries, the greatest quantities in terms of both individual sherds and coherent assemblages speaks strongly to intense trade during the Late Roman (Early Byzantine) period, from the fourth through the seventh century. Not surprisingly, this rapid floruit in maritime trade parallels the expansion of settlement throughout the island, including its eventual collapse in the middle of the seventh century.

Leidwanger, Justin Ryan

2005-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

An underwater acoustic channel model using ray tracing in ns-2  

Science Conference Proceedings (OSTI)

Underwater Acoustic Sensor Network (UASN) is the enabling technology for real-time underwater monitoring and data collection. The costly underwater trials and unknown underwater acoustic modem infrastructures increase the need and importance of a reliable ... Keywords: ns-2, ray tracing, sensor network, underwater

Tarik Çinar; M. Bülent Örencik

2009-12-01T23:59:59.000Z

162

Optical Delineation of Benthic Habitat Using an Autonomous Underwater Vehicle  

SciTech Connect

To improve understanding and characterization of coastal regions, there has been an increasing emphasis on autonomous systems that can sample the ocean on relevant scales. Autonomous underwater vehicles (AUVs) with active propulsion are especially well suited for studies of the coastal ocean because they are able to provide systematic and near-synoptic spatial observations. With this capability, science users are beginning to integrate sensor suits for a broad range of specific and often novel applications. Here, the relatively mature Remote Environmental Monitoring Units (REMUS) AUV system is configured with multi-spectral radiometers to delineate benthic habitat in Sequim Bay, WA. The vehicle was deployed in a grid pattern along 5 km of coastline in depths from 30 to less than 2 meters. Similar to satellite and/or aerial remote sensing, the bandwidth ratios from the downward looking radiance sensor and upward looking irradiance sensor were used to identify beds of eelgrass on sub-meter scales. Strong correlations were found between the optical reflectance signals and the geo-referenced in situ data collected with underwater video within the grid. Results demonstrate the ability of AUVs to map littoral habitats at high resolution and highlight the overall utility of the REMUS vehicle for nearshore oceanography.

Moline, Mark A.; Woodruff, Dana L.; Evans, Nathan R.

2007-06-01T23:59:59.000Z

163

Virtual long baseline (VLBL) autonomous underwater vehicle navigation using a single transponder  

E-Print Network (OSTI)

(cont.) Therefore, accurate underwater navigation using a single location transponder would provide dramatic time and cost savings for underwater vehicle operations. This thesis presents a simulation of autonomous underwater ...

LaPointe, Cara Elizabeth Grupe

2006-01-01T23:59:59.000Z

164

Underwater acoustic sensor networks: research challenges Ian F. Akyildiz *, Dario Pompili, Tommaso Melodia  

E-Print Network (OSTI)

Underwater acoustic sensor networks: research challenges Ian F. Akyildiz *, Dario Pompili, Tommaso September 2004; accepted 21 January 2005 Abstract Underwater sensor nodes will find applications navigation and tactical surveillance applications. Moreover, unmanned or autonomous underwater vehicles (UUVs

Baykal, Buyurman

165

Software Modems for Underwater Sensor Networks Raja Jurdak, Pedro Aguiar, Pierre Baldi, and Cristina Videira Lopes  

E-Print Network (OSTI)

Software Modems for Underwater Sensor Networks Raja Jurdak, Pedro Aguiar, Pierre Baldi acoustic hardware represent an obstacle for underwater sensor network deployment efforts. To address this issue, we propose underwater networks that rely on widely available speakers and microphones

Aguiar, Pedro M. Q.

166

DISCRETE TRANSPARENT BOUNDARY CONDITIONS FOR WIDE ANGLE PARABOLIC EQUATIONS IN UNDERWATER  

E-Print Network (OSTI)

DISCRETE TRANSPARENT BOUNDARY CONDITIONS FOR WIDE ANGLE PARABOLIC EQUATIONS IN UNDERWATER ACOUSTICS "parabolic" equations (WAPEs) in underwater acoustics (assuming cylindrical symmetry). Existing the discretization of transparent bottom boundary conditions. In oceanography one wants to calculate the underwater

Ehrhardt, Matthias

167

Underwater tanker ballast water/oil separation  

SciTech Connect

The invention contemplates tranferring ballast water contaminated with entrained or emulsified oil to an underwater disengagement zone operating on the water displacement principle, as exemplified by an underwater storage tank having an upwardly convex shell with an opening in its bottom through which water can move into and out of the shell as the volume of oil enclosed within the storage zone fluctuates. The ballast mixture of water and oil is introduced into the disengagement zone, where it separates under the influence of gravity into separate oil and water phases. The oil layer rises to a point from which it can be recovered, while the separated water flows out of the open bottom of the zone into the body of water. (2 claims)

McCabe, J.S.

1973-10-02T23:59:59.000Z

168

Underwater splice for submarine coaxial cable  

SciTech Connect

The invention is a device for splicing submarine coaxial cable underwater on the seafloor with a simple push-on operation to restore and maintain electrical and mechanical strength integrity; the splice device is mateable directly with the severed ends of a coaxial cable to be repaired. Splicing assemblies comprise a dielectric pressure compensating fluid filled guide cavity, a gelled castor oil cap and wiping seals for exclusion of seawater, electrical contacts, a cable strength restoration mechanism, and a pressure compensation system for controlled extrusion of and depletion loss prevention of dielectric seal fluid during cable splicing. A splice is made underwater by directly inserting prepared ends of coaxial cable, having no connector attachments, into splicing assemblies.

Inouye, A.T.; Roe, T. Jr.; Tausing, W.R.; Wilson, J.V.

1984-10-30T23:59:59.000Z

169

Underwater Sensor Network (UWSN) LabUnderwater Sensor Network (UWSN) Lab Demonstration of PCDemonstration of PC--based and DSPbased and DSP--basedbased  

E-Print Network (OSTI)

Underwater Sensor Network (UWSN) LabUnderwater Sensor Network (UWSN) Lab Demonstration--OFDM is one ultimate solution for highOFDM is one ultimate solution for high--datadata--raterate underwater acoustic communications!underwater acoustic communications! PC based implementationPC based implementation

Zhou, Shengli

170

Capacity Scaling Laws for Underwater Networks  

E-Print Network (OSTI)

The underwater acoustic channel is characterized by a path loss that depends not only on the transmission distance, but also on the signal frequency. Signals transmitted from one user to another over a distance $l$ are subject to a power loss of $l^{-\\alpha}{a(f)}^{-l}$. Although a terrestrial radio channel can be modeled similarly, the underwater acoustic channel has different characteristics. The spreading factor $\\alpha$, related to the geometry of propagation, has values in the range $1 \\leq \\alpha \\leq 2$. The absorption coefficient $a(f)$ is a rapidly increasing function of frequency: it is three orders of magnitude greater at 100 kHz than at a few Hz. Existing results for capacity of wireless networks correspond to scenarios for which $a(f) = 1$, or a constant greater than one, and $\\alpha \\geq 2$. These results cannot be applied to underwater acoustic networks in which the attenuation varies over the system bandwidth. We use a water-filling argument to assess the minimum transmission power and optimum...

Lucani, Daniel E; Stojanovic, Milica

2009-01-01T23:59:59.000Z

171

Underwater Acoustic Sensor Network with Energy Harvesting Nodes.  

E-Print Network (OSTI)

??This thesis explores the possibility of a self sustained and service free Underwater Acoustic Sensor Network (UASN). The network nodes are installed along a subsea… (more)

Huseby, Morten

2011-01-01T23:59:59.000Z

172

Reconstruction of 3D Points From Uncalibrated Underwater Video.  

E-Print Network (OSTI)

??This thesis presents a 3D reconstruction software pipeline that is capable of generating point cloud data from uncalibrated underwater video. This research project was undertaken… (more)

Cavan, Neil

2011-01-01T23:59:59.000Z

173

Modelling and control of underwater inspection vehicle for aquaculture sites.  

E-Print Network (OSTI)

?? Underwater vehicles such as AUVs and ROVs with hovering capabilities is a promising method for inspection of net integrity in large scale, sea based,… (more)

Hval, Mats Nåvik

2012-01-01T23:59:59.000Z

174

Underwater kicking following the freestyle tumble-turn.  

E-Print Network (OSTI)

??Swim turns are a component of competitive swimming where considerable advantage can be gained or lost. This thesis investigates underwater dolphin and flutter kicking techniques… (more)

Clothier, Peter

2004-01-01T23:59:59.000Z

175

Reliable Data Communication and Storage in Underwater Acoustic Networks.  

E-Print Network (OSTI)

??Underwater acoustic communications (UAC) and networking (UAN) are promising paradigms for various oceanic applications. However, acoustic signal transmissions are characterized by long propagation delay, frequency-dependent… (more)

Cao, Rui

2011-01-01T23:59:59.000Z

176

High-Speed Fracture Phenomena of Glass Bottle by Underwater ...  

Science Conference Proceedings (OSTI)

Presentation Title, High-Speed Fracture Phenomena of Glass Bottle by Underwater Shock Wave. Author(s), Hidetoshi Sakamoto, Shinjirou Kawabe, Yoshifumi ...

177

Development of a Field Deployable Underwater Laser Scanning System.  

E-Print Network (OSTI)

??As humans seek to explore and exploit underwater environments and resources the need for tools and techniques to assist in this is critical. An important… (more)

Gillham, Jason

2011-01-01T23:59:59.000Z

178

Underwater Acoustic Localisation in the context of Autonomous Submersibles .  

E-Print Network (OSTI)

??With the advancement of the field of underwater robotics, the amount of autonomy embodied in the vehicles themselves have considerably increased while making it possible… (more)

Kottege, Navinda

2011-01-01T23:59:59.000Z

179

Use of an acoustic network as an underwater positioning system .  

E-Print Network (OSTI)

??Underwater acoustic networks provide an interface between UUVs and surface or land-based control systems. By exploiting range data measured incidental to communications on these networks… (more)

Reed, Michael S.

2006-01-01T23:59:59.000Z

180

Design, implementation and performance evaluation of security services for Underwater Acoustic Networks.  

E-Print Network (OSTI)

??Underwater Acoustic Networks (UANs), composed by Autonomous Underwater Vehicles (AUVs) are part of a new network paradigm that is being proposed for different uses like… (more)

MASSANTI, GIULIANO

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

A Framework for Testing of Wireless Underwater Robots  

Science Conference Proceedings (OSTI)

Underwater applications of wireless robots are foreseen to hold a market potential. The standardization process will drive the development of the necessary technology so that devices can work cooperatively. Specific testing procedures have to be developed ... Keywords: Conformance, Interoperability, Testing, Underwater, Wireless robot

J. Poncela; M. C. Aguayo-Torres

2013-06-01T23:59:59.000Z

182

Application of optimization algorithms to trajectory planning for underwater gliders  

Science Conference Proceedings (OSTI)

Underwater gliders are a technology that have demonstrated to be a valid tool for diverse applications in the oceans including validation of currents models, environmental control or security. Due to their low speed, gliders might drift significantly ... Keywords: path planning, underwater gliders

José Isern-Gonz$#225;lez; Daniel Hern$#225;ndez-Sosa; Enrique Fern$#225;ndez-Perdomo; Jorge Cabrera-G$#225;mez; Antonio C. Domínguez-Brito; Víctor Prieto-Marañón

2011-02-01T23:59:59.000Z

183

Focused beam routing protocol for underwater acoustic networks  

Science Conference Proceedings (OSTI)

Multi-hop transmission is considered for large coverage areas in bandwidth-limited underwater acoustic networks. In this paper, we present a scalable routing technique based on location information, and optimized for minimum energy per bit consumption. ... Keywords: power control, routing, underwater acoustic networks

Josep Miquel Jornet; Milica Stojanovic; Michele Zorzi

2008-09-01T23:59:59.000Z

184

Towards automated design of MAC protocols for underwater wireless networks  

Science Conference Proceedings (OSTI)

We present a framework for the automated design of MAC protocols for underwater acoustic wireless networks. We formulate a protocol optimization problem in which the exchange of control packets is explicitly modeled. A protocol optimization program generates ... Keywords: automation, mac, network, wireless underwater protocol

Volkan Rodoplu; Amir Aminzadeh Gohari; Wei Tang

2008-09-01T23:59:59.000Z

185

Study on Hydrodynamic Outline of an Unmanned Underwater Vehicle  

Science Conference Proceedings (OSTI)

Unmanned Underwater Vehicle (UUV) is being widely developed and used in many areas. In order to meet the low resistance and low noise requirements of a kind of UUV for long voyage, the outline curve and parameters of different sections of the UUV are ... Keywords: Unmanned underwater vehicle, Hydrodynamic outline, Low resistance, Low noise

Shao Zhiyu, Fang Jing, Feng Shunshan, Cheng Yufeng

2013-01-01T23:59:59.000Z

186

Underwater sensor networking: Research challenges and potential applications  

E-Print Network (OSTI)

This report summarizes our research directions in underwater sensor networks. We highlight potential applications to off-shore oilfields for seismic monitoring, equipment monitoring, and underwater robotics. We identify research directions in short-range acoustic communications, MAC, time synchronization, and localization protocols for highlatency acoustic networks, long-duration network sleeping, and application-level data scheduling. 1

John Heidemann; Yuan Li; Affan Syed; Jack Wills; Wei Ye

2006-01-01T23:59:59.000Z

187

Sensor-based Behavior Control for an Autonomous Underwater Vehicle  

Science Conference Proceedings (OSTI)

In this paper, we evaluate a set of core functions that allow an underwater robot to perform surveillance under operator control. Specifically, we are interested in behaviors that facilitate the monitoring of organisms on a coral reef, and we present ... Keywords: Underwater robotics, adaptive gait control, computer vision, swimming robots, symbolic languages, visual human-robot interaction, visual servoing

Junaed Sattar; Philippe Giguère; Gregory Dudek

2009-06-01T23:59:59.000Z

188

Design and implementation of an underwater sound recording device  

SciTech Connect

The purpose of this study was to design and build two versions of an underwater sound recording device. The device designed is referred to as the Underwater Sound Recorder (USR), which can be connected to one or two hydrophones or other underwater sound sensors. The URS contains a 26 dB preamplifier and a user selectable gain that permits additional amplification of input to the system from 26 dB to 46 dB. Signals within the frequency range up to 15 kHz may be recorded using the USR. Examples of USR applications are monitoring underwater processes that have the potential to create large pressure waves that could potentially harm fish or other aquatic life, such as underwater explosions or pile driving. Additional applications are recording sound generated by vessels or the vocalizations of some marine mammals, such as the calls from many species of whales.

Martinez, Jayson J.; Myers, Joshua R.; Carlson, Thomas J.; Deng, Zhiqun; Rohrer, John S.; Caviggia, Kurt A.

2011-09-19T23:59:59.000Z

189

Underwater localization based on multicarrier waveforms  

E-Print Network (OSTI)

Abstract—In this paper, we investigate the problem of localizing an underwater sensor node based on message broadcasting from multiple surface nodes. With the time-of-arrival measurements from a DSP-based multicarrier modem, each sensor node localizes itself based on the travel time differences among multiple senders to the receiver. Using one-way message passing, such a solution can scalably accommodate a large number of nodes in a network. We present simulation results as well as preliminary testing results in a swimming pool and in a local lake. Surface buoys with GPS sensors self-localization via acoustic links I.

Patrick Carroll; Shengli Zhou; Hao Zhou; Jun-hong Cui; Peter Willett

2010-01-01T23:59:59.000Z

190

Analysis of using fuel cell technology for autonomous underwater vehicle power supply  

Science Conference Proceedings (OSTI)

Nowadays underwater robotics aims at semi or whole autonomous underwater vehicles. Autonomy of underwater robots depends on their control systems usually based on artificial intelligence methods and capacity of supply sources mounted on their boards. ... Keywords: fuel cell, underwater vehicle power supply

Grzegorz Grzeczka; Piotr Szymak

2009-05-01T23:59:59.000Z

191

Proceedings of the 2008 IFAC Workshop on Navigation, Guidance and Control of Underwater Vehicles  

E-Print Network (OSTI)

Proceedings of the 2008 IFAC Workshop on Navigation, Guidance and Control of Underwater Vehicles Autonomous Underwater Multivehicle Control with Limited Communication: Theory and Experiment Daniel J. Klein underwater vehicles linked via underwater communi- cation. By treating heading angle as oscillator phase

Morgansen, Kristi

192

Underwater robots require adequate guidance and control to perform useful tasks. Visual  

E-Print Network (OSTI)

Abstract Underwater robots require adequate guidance and control to perform useful tasks. Visual trained by reinforcement learn- ing our aim is to enable an underwater robot to hold station on a reef technologies for underwater exploration and obser- vation. Our objectives are to enable underwater robots

193

Aqua-Net: An Underwater Sensor Network Architecture --Design and Implementation  

E-Print Network (OSTI)

Aqua-Net: An Underwater Sensor Network Architecture -- Design and Implementation Zheng Peng, Zhong Department, University of Connecticut, Storrs, CT 06269 Abstract Underwater sensor network (UWSN) has emerged architecture for underwater sensor network. This paper proposes AQUA-NET, an architecture for underwater sensor

Cui, Jun-Hong

194

HIPPOPOTAMUS UNDERWATER LOCOMOTION: REDUCED-GRAVITY MOVEMENTS FOR A MASSIVE MAMMAL  

E-Print Network (OSTI)

HIPPOPOTAMUS UNDERWATER LOCOMOTION: REDUCED- GRAVITY MOVEMENTS FOR A MASSIVE MAMMAL BRITTANY L on land by such heavy animals. Videos of the underwater locomotion of 2 hippopotami were analyzed frame by frame. Average horizontal velocity underwater was 0.47 m/s. Hippopotami used a gait underwater

Fish, Frank

195

Specs add confidence in use of wet welding. [Underwater welding  

SciTech Connect

Underwater wet welding can now be utilized with the same confidence as dry welding, provided certain guidelines are followed. A new electrode is discussed that has been delivering exceptionally high quality welds by a diving firm in Houston. With the issuance of the American Welding Society's specifications (ANS/LAWS D3.6-83) much of the confusion surrounding underwater welding should be eliminated. The new specifications establish the levels of quality for underwater welding and gives everyone in the business a common language.

1984-02-01T23:59:59.000Z

196

Algorithms and analysis for underwater vehicle plume tracing.  

SciTech Connect

The goal of this research was to develop and demonstrate cooperative 3-D plume tracing algorithms for miniature autonomous underwater vehicles. Applications for this technology include Lost Asset and Survivor Location Systems (L-SALS) and Ship-in-Port Patrol and Protection (SP3). This research was a joint effort that included Nekton Research, LLC, Sandia National Laboratories, and Texas A&M University. Nekton Research developed the miniature autonomous underwater vehicles while Sandia and Texas A&M developed the 3-D plume tracing algorithms. This report describes the plume tracing algorithm and presents test results from successful underwater testing with pseudo-plume sources.

Byrne, Raymond Harry; Savage, Elizabeth L. (Texas A& M University, College Station, TX); Hurtado, John Edward (Texas A& M University, College Station, TX); Eskridge, Steven E.

2003-07-01T23:59:59.000Z

197

CX-009160: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

Underwater Active Acoustic Monitoring Network for Marine and Hydrokinetic Energy Projects CX(s) Applied: B3.3 Date: 09/24/2012 Location(s): Maine Offices(s): Golden Field Office

198

Spectroscopic research of underwater electrical wire explosion  

Science Conference Proceedings (OSTI)

Results of spectroscopic research in the visible range of light of the radiation generated by underwater electrical wire explosions (UEWE) are presented. A pulsed generator with an output voltage of {approx}110 kV, current of {approx}70 kA, and rise time of {approx}60 ns was used for electrical explosion of Cu wires 0.1 mm in diameter and 50 mm in length. It was shown that UEWE is not governed by the 'polarity' effect, which plays an important role in electrical wire explosions in vacuum. The results of detailed space- and time-resolved spectroscopic measurements show that the radiation spectrum differs significantly of the spectrum expected from the exploding wire. A model is suggested based on the formation of a few {mu}m 'water' plasma layer in the vicinity of the exploding wire plasma which efficiently absorbs the radiation of the exploding wire.

Fedotov, A.; Sheftman, D.; Gurovich, V. Tz.; Efimov, S.; Bazilitski, G.; Krasik, Ya. E. [Physics Department, Technion-Israel Institute of Technology, 32000 Haifa (Israel); Oreshkin, V. I. [Institute of High Current Electronics, RAS, Tomsk (Russian Federation)

2008-08-15T23:59:59.000Z

199

Direct-form adaptive equalization for underwater acoustic communication  

E-Print Network (OSTI)

Adaptive equalization is an important aspect of communication systems in various environments. It is particularly important in underwater acoustic communication systems, as the channel has a long delay spread and is subject ...

Yellepeddi, Atulya

2012-01-01T23:59:59.000Z

200

Examining transmission power in minimum capacity underwater acoustic networks  

E-Print Network (OSTI)

This paper explores the prospect of reducing the transmission power required to operate links within an underwater acoustic network by minimizing the total capacity of the network while maintaining certain data flow ...

Stanchak, Kathryn E

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Modeling and control of a biorobotic autonomous underwater vehicle  

E-Print Network (OSTI)

Current research into Autonomous Underwater Vehicles (AUVs) has included work on biologically inspired propulsion mechanisms, for instance flapping foils. The first aim of this thesis is to develop an accurate non-linear ...

Booth, William Duncan Lewis

2006-01-01T23:59:59.000Z

202

Underwater Radiance Distributions Measured with Miniaturized Multispectral Radiance Cameras  

Science Conference Proceedings (OSTI)

Miniaturized radiance cameras measuring underwater multispectral radiances in all directions at high-radiometric accuracy (CE600) are presented. The camera design is described, as well as the main steps of its optical and radiometric ...

David Antoine; André Morel; Edouard Leymarie; Amel Houyou; Bernard Gentili; Stéphane Victori; Jean-Pierre Buis; Nicolas Buis; Sylvain Meunier; Marius Canini; Didier Crozel; Bertrand Fougnie; Patrice Henry

2013-01-01T23:59:59.000Z

203

Large scale structure from motion for autonomous underwater vehicle surveys  

E-Print Network (OSTI)

Our ability to image extended underwater scenes is severely limited by attenuation and backscatter. Generating a composite view from multiple overlapping images is usually the most practical and flexible way around this ...

Pizarro, Oscar

2004-01-01T23:59:59.000Z

204

An Autonomous Underwater Vehicle for the Study of Small Lakes  

Science Conference Proceedings (OSTI)

A small autonomous underwater vehicle (AUV) was designed and built to carry a wide variety of oceanographic sensors in the relatively benign lacustrine environment. PURLII navigates along preprogrammed paths for up to 3 h using compass, depth, ...

Bernard Laval; John S. Bird; Peter D. Helland

2000-01-01T23:59:59.000Z

205

Gabor Transform Application in Feature Description of Underwater Echo Signal  

Science Conference Proceedings (OSTI)

For the nonstationarity of target echo signals acquired by laser underwater target detecting system and the relevance between target echo signal and noise, in virtue of texture analysis of image processing, Gabor transform is used to localize the target ...

Shubin Yang; Wanlong Cui; Huaxi Wang

2009-12-01T23:59:59.000Z

206

Information-theoretic limits of dense underwater networks  

E-Print Network (OSTI)

Information-theoretic throughput scaling laws are analyzed in an underwater acoustic network with n regularly located nodes on a unit square, in which both bandwidth and received signal power can be severely limited. A ...

Shin, Won-Yong

207

State Estimation Strategies for Autonomous Underwater Vehicle Fish Tracking Applications  

E-Print Network (OSTI)

I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. Jun Zhou ii As the largest unexplored area on earth, the underwater world has unlimited attraction to marine scientists. Due to the complexity of the underwater environment and the limitations of human divers, underwater exploration has been facilitated by the use of submarines, Remotely Operated Vehicles (ROVs) and Autonomous Underwater Vehicles (AUVs). In recent years, use of autonomous control systems being integrated with visual sensors has increased substantially, especially in marine applications involving guidance of AUVs. In this work, autonomous fish-tracking via AUV with vision servoing control system is studied with the purpose of assisting marine biologists in gathering detailed

Jun Zhou

2007-01-01T23:59:59.000Z

208

Reduced bandwidth frequency domain equalization for underwater acoustic communications  

E-Print Network (OSTI)

Two challenges facing adaptive decision feedback equalizers (DFEs) in the underwater acoustic channel are those of the channel changing too rapidly to allow for the stable adaptation of the number of coefficients required ...

Wornell, Gregory W.

209

Imaging sonar-aided navigation for autonomous underwater harbor surveillance  

E-Print Network (OSTI)

In this paper we address the problem of drift-free navigation for underwater vehicles performing harbor surveillance and ship hull inspection. Maintaining accurate localization for the duration of a mission is important ...

Johannsson, Hordur

210

Large area 3-D reconstructions from underwater optical surveys  

E-Print Network (OSTI)

Robotic underwater vehicles are regularly performing vast optical surveys of the ocean floor. Scientists value these surveys since optical images offer high levels of detail and are easily interpreted by humans. Unfortunately, ...

Singh, Hanumant

211

Listening to Raindrops from Underwater: An Acoustic Disdrometer  

Science Conference Proceedings (OSTI)

Different sized raindrops splashing on a water surface produce sound underwater that is distinctive and can be used to measure the drop size distribution in the rain. Five acoustically significant raindrop sizes are described. An inversion of the ...

Jeffrey A. Nystuen

2001-10-01T23:59:59.000Z

212

Autonomous Depth Adjustment for Underwater Sensor Networks: Design and Applications  

E-Print Network (OSTI)

To fully understand the ocean environment requires sensing the full water column. Utilizing a depth adjustment system on an underwater sensor network provides this while also improving global sensing and communications. ...

Detweiler, Carrick

213

MAC and Routing Protocols for Mobile Underwater Acoustic Sensor Swarms.  

E-Print Network (OSTI)

??Underwater Acoustic Sensor Networks (UW-ASNs) have recently been proposed as a way to explore and observe the ocean, which covers two-thirds of the Earth's surface.… (more)

Noh, Young Tae

2012-01-01T23:59:59.000Z

214

Development of a snorkel for unmanned underwater vehicles  

E-Print Network (OSTI)

The development of unmanned underwater vehicles (UUV) has provided a bevy of opportunities for the exploration of the ocean. However, one limitation has kept UUVs from truly becoming mass produced, its limited range. The ...

Tia, Peter (Peter M.)

2012-01-01T23:59:59.000Z

215

Path planning of Autonomous Underwater Vehicles for adaptive sampling  

E-Print Network (OSTI)

This thesis develops new methods for path planning of Autonomous Underwater Vehicles for adaptive sampling. The problem is approached in an optimization framework and two methods are developed to solve it based on Mixed ...

Yilmaz, Namik Kemal, 1975-

2006-01-01T23:59:59.000Z

216

Autonomous underwater vehicle navigation and mapping in dynamic, unstructured environments  

E-Print Network (OSTI)

This thesis presents a system for automatically building 3-D optical and bathymetric maps of underwater terrain using autonomous robots. The maps that are built improve the state of the art in resolution by an order of ...

Kunz, Clayton Gregory

2012-01-01T23:59:59.000Z

217

Sensor Data Processing for Tracking Underwater Threats Using Terascale Optical Core Devices  

SciTech Connect

A critical aspect of littoral surveillance (including port protection) involves the localization and tracking of underwater threats such as manned or unmanned autonomous underwater vehicles. In this article, we present a methodology for locating underwater threat sources from uncertain sensor network data, and illustrate the threat tracking aspects using active sonars in a matched filter framework. The novelty of the latter paradigm lies in its implementation on a tera-scale optical core processor, EnLight , recently introduced by Lenslet Laboratories. This processor is optimized for array operations, which it performs in a fixed point arithmetic architecture at tera-scale throughput. Using the EnLight 64 prototype processor, our results (i) illustrate the ability to reach a robust tracking accuracy, and (ii) demonstrate that a considerable speed-up (a factor of over 13,000) can be achieved when compared to an Intel XeonTM processor in the computation of sets of 80K-sample complex Fourier transforms that are associated with our matched filter techniques.

Barhen, Jacob [ORNL; Imam, Neena [ORNL

2009-01-01T23:59:59.000Z

218

Research Challenges and Applications for Underwater Sensor Networking  

E-Print Network (OSTI)

This paper explores applications and challenges for underwater sensor networks. We highlight potential applications to off-shore oilfields for seismic monitoring, equipment monitoring, and underwater robotics. We identify research directions in shortrange acoustic communications, MAC, time synchronization, and localization protocols for high-latency acoustic networks, longduration network sleeping, and application-level data scheduling. We describe our preliminary design on short-range acoustic communication hardware, and summarize results of high-latency time synchronization.

John Heidemann; Wei Ye; Jack Wills; Affan Syed; Yuan Li

2006-01-01T23:59:59.000Z

219

Remote Underwater Characterization System - Innovative Technology Summary Report  

Science Conference Proceedings (OSTI)

Characterization and inspection of water-cooled and moderated nuclear reactors and fuel storage pools requires equipment capable of operating underwater. Similarly, the deactivation and decommissioning of older nuclear facilities often requires the facility owner to accurately characterize underwater structures and equipment which may have been sitting idle for years. The underwater characterization equipment is often required to operate at depths exceeding 20 ft (6.1 m) and in relatively confined or congested spaces. The typical baseline approach has been the use of radiation detectors and underwater cameras mounted on long poles, or stationary cameras with pan and tilt features mounted on the sides of the underwater facility. There is a perceived need for an inexpensive, more mobile method of performing close-up inspection and radiation measurements in confined spaces underwater. The Remote Underwater Characterization System (RUCS) is a small, remotely operated submersible vehicle intended to serve multiple purposes in underwater nuclear operations. It is based on the commercially-available “Scallop” vehicle1, but has been modified by Department of Energy’s Robotics Technology Development Program to add auto-depth control, and vehicle orientation and depth monitoring at the operator control panel. The RUCS is designed to provide visual and gamma radiation characterization, even in confined or limited access areas. It was demonstrated in August 1998 at Idaho National Engineering and environmental Laboratory (INEEL) as part of the INEEL Large Scale Demonstration and Deployment Project. During the demonstration it was compared in a “head-tohead” fashion with the baseline characterization technology. This paper summarizes the results of the demonstration and lessons learned; comparing and contrasting both technologies in the areas of cost, visual characterization, radiological characterization, and overall operations.

Willis, Walter David

1999-04-01T23:59:59.000Z

220

Polarimetry and Schlieren diagnostics of underwater exploding wires  

SciTech Connect

Nondisturbing laser-probing polarimetry (based on the Faraday and Kerr effects) and Schlieren diagnostics were used in the investigation of underwater electrical wire explosion. Measuring the polarization plane rotation angle of a probing laser beam due to the Faraday effect allows one to determine an axially resolved current flowing through the exploding wire, unlike commonly used current probes. This optical method of measuring current yields results that match those obtained using a current viewing resistor within an accuracy of 10%. The same optical setup allows simultaneous space-resolved measurement of the electric field using the Kerr effect. It was shown that the maximal amplitude of the electric field in the vicinity of the high-voltage electrode is approx80 kV/cm and that the radial electric field is <1 MV/cm during the wire explosion. Finally, it was shown that the use of Schlieren diagnostics allows one to obtain qualitatively the density distribution behind the shock wave front, which is important for the determination of the energy transfer from the discharge channel to the generated water flow.

Fedotov-Gefen, A. V.; Krasik, Ya. E. [Physics Department, Technion, 32000 Haifa (Israel)

2009-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Three-Dimenisional Routing in Underwater Acoustic Sensor Networks  

E-Print Network (OSTI)

Underwater sensor networks will find applications in oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation, and tactical surveillance applications. In this paper, the problem of data gathering in a 3D underwater acoustic sensor network is investigated at the network layer, by considering the interactions between the routing functions and the characteristics of the underwater channel. Two routing algorithms are proposed for delay-insensitive and delay-sensitive sensor network applications, respectively. The proposed distributed algorithm for delay-insensitive applications allows each node to select its next hop, with the objective of minimizing the energy consumption taking into account the varying condition of the underwater channel. A centralized algorithm for delay-sensitive routing in an underwater environment is proposed. The solution relies on topology information gathered by a surface station, which optimally configures the network paths. The proposed algorithms are shown to achieve the performance targets of the underwater environment by means of simulation. Categories and Subject Descriptors:

Dario Pompili; Tommaso Melodia

2005-01-01T23:59:59.000Z

222

Feasibility of underwater welding of highly irradiated in-vessel components of boiling-water reactors: A literature review  

SciTech Connect

In February 1997, the U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research (RES), initiated a literature review to assess the state of underwater welding technology. In particular, the objective of this literature review was to evaluate the viability of underwater welding in-vessel components of boiling water reactor (BWR) in-vessel components, especially those components fabricated from stainless steels that are subjected to high neutron fluences. This assessment was requested because of the recent increased level of activity in the commercial nuclear industry to address generic issues concerning the reactor vessel and internals, especially those issues related to repair options. This literature review revealed a preponderance of general information about underwater welding technology, as a result of the active research in this field sponsored by the U.S. Navy and offshore oil and gas industry concerns. However, the literature search yielded only a limited amount of information about underwater welding of components in low-fluence areas of BWR in-vessel environments, and no information at all concerning underwater welding experiences in high-fluence environments. Research reported by the staff of the U.S. Department of Energy (DOE) Savannah River Site and researchers from the DOE fusion reactor program proved more fruitful. This research documented relevant experience concerning welding of stainless steel materials in air environments exposed to high neutron fluences. It also addressed problems with welding highly irradiated materials, and primarily attributed those problems to helium-induced cracking in the material. (Helium is produced from the neutron irradiation of boron, an impurity, and nickel.) The researchers found that the amount of helium-induced cracking could be controlled, or even eliminated, by reducing the heat input into the weld and applying a compressive stress perpendicular to the weld path.

Lund, A.L.

1997-11-01T23:59:59.000Z

223

Design of an autonomous underwater vehicle : vehicle tracking and position control.  

E-Print Network (OSTI)

??This project proposes the development of an autonomous underwater vehicle that can be used to perform underwater research missions..The vehicle can be pre-programmed to complete… (more)

Holtzhausen, Servaas.

2010-01-01T23:59:59.000Z

224

Communication protocols for underwater data collection using a robotic sensor network  

E-Print Network (OSTI)

We examine the problem of collecting data from an underwater sensor network using an autonomous underwater vehicle (AUV). The sensors in the network are equipped with acoustic modems that provide noisy, range-limited ...

Singh, Hanumant

2013-05-01T23:59:59.000Z

225

Open loop performance of a biomimetic flapping foil autonomous underwater vehicle  

E-Print Network (OSTI)

Flapping foil propulsion is emerging as an alternative to conventional propulsion for underwater vehicles. MIT's Biomimetic Flapping Foil Autonomous Underwater Vehicle is a prototype vehicle that uses four three-dimensional ...

Wolf, Malima Isabelle, 1981-

2006-01-01T23:59:59.000Z

226

Underwater Explosive Shock Consolidation of Nanocomposite Pr2Fe14B/-Fe Magnetic Powders  

E-Print Network (OSTI)

PR O O FS Underwater Explosive Shock Consolidation of Nanocomposite Pr2Fe14B/-Fe Magnetic Powders; Accepted January 6, 2005) Keywords: explosive compaction, underwater shock wave, nanocomposites, magnetic

Liu, J. Ping

227

Ray-based analysis of the interference striation pattern in an underwater acoustic waveguide  

E-Print Network (OSTI)

In some underwater acoustic waveguides with specially selected sound speed profiles striations or fringes of the interference pattern are determined by a single parameter \\beta\\ called the waveguide (or Chuprov) invariant. In the present paper it is shown that an analytical description of fringes may be possible in a waveguide with an arbitrary sound speed profile. A simple analytical expression is obtained for smooth lines formed by local maxima of the interference pattern. This result is valid at long enough ranges. It is derived proceeding from a known relation connecting the differences of ray travel times and the action variables of ray paths.

Virovlyansky, A L

2013-01-01T23:59:59.000Z

228

HydroNode: an underwater sensor node prototype for monitoring hydroelectric reservoirs  

Science Conference Proceedings (OSTI)

The research of underwater sensor networks (UWSNs) is gaining attention due to its possible applications in many scenarios, such as ecosystem preservation, disaster prevention, oil and gas exploration and freshwater reservoirs management. The main elements ... Keywords: hydroelectric, monitoring, reservoirs, underwater sensor networks, underwater sensor node

Luiz F. M. Vieira; Marcos A. M. Vieira; David Pinto; José Augusto M. Nacif; Sadraque S. Viana; Alex B. Vieira

2012-11-01T23:59:59.000Z

229

Effect of inelastic scattering on underwater daylight in the ocean: model evaluation,  

E-Print Network (OSTI)

optical processes affecting underwater daylight are mathematically described by the radiativeEffect of inelastic scattering on underwater daylight in the ocean: model evaluation, validation capable of simulating underwater daylight in the ocean is presented. The main focus is on gelbstoff

Oldenburg, Carl von Ossietzky Universität

230

Robust Vision-based Underwater Target Identification & Homing Using Self-Similar  

E-Print Network (OSTI)

Robust Vision-based Underwater Target Identification & Homing Using Self-Similar Landmarks Amaury. Next generation Autonomous Underwater Vehicles (AUVs) will be re- quired to robustly identify underwater targets for tasks such as inspection, locali- sation and docking. Given their often unstructured

Paris-Sud XI, Université de

231

The DRL Underwater Sensor Network: Supporting Dual Communications, Sensing, and Mobility  

E-Print Network (OSTI)

The DRL Underwater Sensor Network: Supporting Dual Communications, Sensing, and Mobility Iuliu Vasilescu, Carrick Detweiler and Daniela Rus We propose to demonstrate the underwater sensor network are anchored with weights and form a static underwater network. This network self-localizes a range based 3D

Farritor, Shane

232

Long-term underwater camera surveillance for monitoring and analysis of fish populations  

E-Print Network (OSTI)

Long-term underwater camera surveillance for monitoring and analysis of fish populations Bastiaan J Laboratories, Taiwan Abstract Long-term monitoring of the underwater environ- ment is still labour intensive work. Using underwater surveillance cameras to monitor this environment has the potential advantage

Fisher, Bob

233

A Statistical Learning-Based Method for Color Correction of Underwater Images  

E-Print Network (OSTI)

A Statistical Learning-Based Method for Color Correction of Underwater Images Luz A. Torres the problem of color correction of un- derwater images using statistical priors. Underwater images present by using a non-parametric sampling procedure. Experimental results on a variety of underwater scenes

Dudek, Gregory

234

Using a High Order Sliding Modes for diving control a torpedo Autonomous Underwater Vehicle  

E-Print Network (OSTI)

Using a High Order Sliding Modes for diving control a torpedo Autonomous Underwater Vehicle T Underwater Vehicle AUV is not a trivial task, due to: Parameter uncertainties (as added mass, hydrodynamic underwater robots are basically two: PD [2] [10] and Sliding Modes Control (SMC) [6] [11]. These algorithms

Paris-Sud XI, Université de

235

Stability Analysis of a New Extended L1 Controller with Experimental Validation on an Underwater Vehicle  

E-Print Network (OSTI)

Stability Analysis of a New Extended L1 Controller with Experimental Validation on an Underwater on an underwater vehicle subjected to a varying trajectory under several dis- turbances are then displayed. Moreover, experimental results are provided on an underwater vehicle in depth. The robot is expected

236

A New Discrete Transparent Boundary Condition for Standard and Wide Angle "Parabolic" Equations in Underwater Acoustics  

E-Print Network (OSTI)

in Underwater Acoustics ANTON ARNOLD1,2 AND MATTHIAS EHRHARDT1 1 Fachbereich Mathematik TU Berlin, MA 6­2 Stra�e in underwater acoustics, where they have been introduced by Tappert [31]. An account on the vast recent literature is given in the survey article [21]. In oceanography one wants to calculate the underwater

Ehrhardt, Matthias

237

Abstract-Homing and navigation capabilities are essential for many Autonomous Underwater Vehicle  

E-Print Network (OSTI)

Abstract- Homing and navigation capabilities are essential for many Autonomous Underwater Vehicle, speed bias and underwater currents affect dead-reckoning measurements. All operation need to have INTRODUCTION Actually, there is a real challenge on application of Autonomous Underwater Vehicle, particularly

Paris-Sud XI, Université de

238

Handling Triple Hidden Terminal Problems for Multi-Channel MAC in Long-Delay Underwater  

E-Print Network (OSTI)

1 Handling Triple Hidden Terminal Problems for Multi-Channel MAC in Long-Delay Underwater Sensor-channel MAC problem in underwater acoustic sensor networks. To reduce hardware cost, only one acoustic transceiver is often preferred on every node. In a single-transceiver multi- channel long-delay underwater

Cui, Jun-Hong

239

A Comparative Analysis and Experimental Study on Wireless Aerial and Underwater Acoustic  

E-Print Network (OSTI)

A Comparative Analysis and Experimental Study on Wireless Aerial and Underwater Acoustic underwater acoustic sensor networks through the use of audio hardware built in to the sensor modules. In this paper, we explore the potential of the acoustic communication system for both aerial and underwater

Lopes, Cristina Videira

240

Underwater temporary threshold shift in pinnipeds: Effects of noise level and duration  

E-Print Network (OSTI)

Underwater temporary threshold shift in pinnipeds: Effects of noise level and duration David Kastak psychophysical techniques were used to evaluate the residual effects of underwater noise on the hearing , amplified Realis- tic MPA-20 , and projected from one of two underwater transducers NUWC J-9 or Lubell

Reichmuth, Colleen

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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241

Time-critical Underwater Sensor Diffusion with No Proactive Exchanges and Negligible Reactive Floods  

E-Print Network (OSTI)

Time-critical Underwater Sensor Diffusion with No Proactive Exchanges and Negligible Reactive multi-hop ad hoc routing in a scalable Underwater Sensor Network (UWSN), which is a novel network in the challenging new underwater environment. Unlike the terrestrial scenarios, on-demand flooding cannot be both

Park, Joon-Sang

242

Tier-Based Underwater Acoustic Routing for Applications with Reliability and Delay Constraints  

E-Print Network (OSTI)

Tier-Based Underwater Acoustic Routing for Applications with Reliability and Delay Constraints Li for underwater sensor networks is still an open research problem because of the unique charac- teristics of the underwater acoustic communication channel such as limited bandwidth, high and variable propagation delays

Melodia, Tommaso

243

PARTICLE FILTERING AND CRAM ER-RAO LOWER BOUND FOR UNDERWATER NAVIGATION  

E-Print Network (OSTI)

PARTICLE FILTERING AND CRAM ´ER-RAO LOWER BOUND FOR UNDERWATER NAVIGATION Rickard Karlsson, Fredrik-mail: {rickard,fredrik}@isy.liu.se Tobias Karlsson Saab Bofors Underwater Systems Box 910 SE-591 29 Motala relying on a dig- ital underwater terrain map and sonar measurements. The method is applicable for both

Gustafsson, Fredrik

244

Athanassis Anastasiou MRes Project: A Robust Acoustic Link for Underwater Data  

E-Print Network (OSTI)

Athanassis Anastasiou MRes Project: A Robust Acoustic Link for Underwater Data Communications The work carried out in this project contains extensive modelling of various underwater communications an appropriate Forward Error Control coding method according to the quality of the underwater channel it operates

Abu-Rgheff, Mosa Ali

245

Hydrobiologia vol. 65, I, pag. 65-68, 1979 A SIZE SELECTIVE UNDERWATER LIGHT TRAP  

E-Print Network (OSTI)

Hydrobiologia vol. 65, I, pag. 65-68, 1979 A SIZE SELECTIVE UNDERWATER LIGHT TRAP R. B. AIKEN underwater light trap isdescribed. Trap records indicate that the trap iseffective in taking a wide variety. (1955) described the construction and operation of an underwater light trap. Their records indi- cate

Aiken, Ron

246

From PD to Nonlinear Adaptive Depth-Control of a Tethered Autonomous Underwater Vehicle  

E-Print Network (OSTI)

From PD to Nonlinear Adaptive Depth-Control of a Tethered Autonomous Underwater Vehicle D and an adaptive nonlinear state feedback one, both applied on a tethered autonomous underwater vehicle. The aim performed using each of the above mentioned control laws. Keywords: Underwater robotics, Depth control

Paris-Sud XI, Université de

247

Underwater temporary threshold shift induced by octave-band noise in three species of pinniped  

E-Print Network (OSTI)

Underwater temporary threshold shift induced by octave-band noise in three species of pinniped at center frequency . Each subject was trained to dive into a noise field and remain stationed underwater airborne. When human divers were tested underwater, for instance, the resultant levels of TTS were much

Reichmuth, Colleen

248

IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 58, NO. 8, AUGUST 2010 4093 Localization in Underwater Dispersive  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 58, NO. 8, AUGUST 2010 4093 Localization in Underwater applications of time-frequency representations deal with the analysis of the underwater acoustic signals nonlinear effect at very low frequencies. That is, if we intend to establish an underwater communication

Paris-Sud XI, Université de

249

In-air and underwater hearing sensitivity of a northern elephant seal (Mirounga angustirostris)  

E-Print Network (OSTI)

In-air and underwater hearing sensitivity of a northern elephant seal (Mirounga angustirostris) D. Kastak and R.J. Schusterman Abstract: In-air and underwater sound detection thresholds were obtainedPa). The upper frequency limit in air was approximately 20 kHz. The underwater audiogram is similar to those

Reichmuth, Colleen

250

Underwater Networking Research at USC/ISI John Heidemann Wei Ye Jack Wills  

E-Print Network (OSTI)

Underwater Networking Research at USC/ISI John Heidemann Wei Ye Jack Wills {johnh. By comparison, underwater sensing today is often expensive, sparsely deployed, and wired, or with very limited of terrestrial sensor networks underwater. To this end we are developing new approaches for hardware, with a new

Heidemann, John

251

Underwater microscope for measuring spatial and temporal changes in bed-sediment grain size  

E-Print Network (OSTI)

Underwater microscope for measuring spatial and temporal changes in bed-sediment grain size David M by Elsevier B.V. Keywords: Underwater microscope; Bed sediment; Grain size; In situ measurement; Colorado counts on a small subset of processed images. 2.3. Underwater microscope hardware Digital images of bed

252

MAPPING OUR UNDERWATER MARINE RESOURCES The MapCoast and BayMap Partnerships  

E-Print Network (OSTI)

MAPPING OUR UNDERWATER MARINE RESOURCES The MapCoast and BayMap Partnerships BAYMAP: CHARTING communities and underwater archaeological sites in a readily accessible GIS format. An interdisciplinary team underwater resources, including bathymetry, habitat, geology, soils/ sediment, and archeological resources

Wang, Y.Q. "Yeqiao"

253

Towards Optimal Broadcasting Policies for HARQ based on Fountain Codes in Underwater Networks  

E-Print Network (OSTI)

Towards Optimal Broadcasting Policies for HARQ based on Fountain Codes in Underwater Networks Paolo technique for the transmission over underwater channels as their performance, in terms of delay, reliability on the topic and encourages us towards the design of practical HARQ protocols for the underwater medium. Index

Rossi, Michele

254

Digital RAC with a disturbance observer for underwater vehicle-manipulator systems  

Science Conference Proceedings (OSTI)

Most control methods of underwater vehiclemanipulator systems (UVMS) are based on the computed torque method that is used for underwater robotic vehicles. We have proposed a resolved acceleration control (RAC) method for UVMS. In this article, we propose ... Keywords: Digital control, Disturbance observer, Manipulator, Underwater robot

Shinichi Sagara; Takashi Yatoh; Tomoaki Shimozawa

2010-12-01T23:59:59.000Z

255

MHK Technologies/Underwater Electric Kite Turbines | Open Energy  

Open Energy Info (EERE)

Underwater Electric Kite Turbines Underwater Electric Kite Turbines < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Underwater Electric Kite Turbines.jpg Technology Profile Primary Organization UEK Corporation Project(s) where this technology is utilized *MHK Projects/Atchafalaya River Hydrokinetic Project II *MHK Projects/Chitokoloki Project *MHK Projects/Coal Creek Project *MHK Projects/Half Moon Cove Tidal Project *MHK Projects/Indian River Tidal Hydrokinetic Energy Project *MHK Projects/Luangwa Zambia Project *MHK Projects/Minas Basin Bay of Fundy Commercial Scale Demonstration *MHK Projects/Passamaquoddy Tribe Hydrokinetic Project *MHK Projects/Piscataqua Tidal Hydrokinetic Energy Project *MHK Projects/UEK Yukon River Project Technology Resource

256

A broadband underwater acoustic modem implementation using coherent OFDM  

E-Print Network (OSTI)

Abstract — Multicarrier modulation in the form of orthogonal frequency division multiplexing (OFDM) has prevailed in recent broadband wireless systems over radio channels. In this senior design project, we have implemented an acoustic OFDM modem that transmits digital data through sound propagation. We have demonstrated OFDM transmission first in air, and then in water. We find that the underwater channel is much more complex than the air channel, and careful signal designs are needed for underwater transmissions. We have also handled another difficulty incurred by sampling rate mismatches at the transmitter and the receiver due to low-cost sampling devices. With two-way communication capabilities, this project provides a simple online chatting tool between two computers relying on acoustic links. Index Terms — OFDM, multicarrier transmission, underwater acoustic communication.

Sean Mason; Robert Anstett; Nicoletti Anicette; Shengli Zhou

2007-01-01T23:59:59.000Z

257

CX-008454: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination Autonomous Underwater Inspection Using a Three Dimensional Laser CX(s) Applied: B3.6 Date: 06152012 Location(s): Colorado Offices(s): National Energy...

258

CX-008455: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination Autonomous Underwater Inspection Using a Three Dimensional Laser CX(s) Applied: B3.6 Date: 06152012 Location(s): Colorado Offices(s): National Energy...

259

Performance analysis of Non Linear Filtering Algorithms for underwater images  

E-Print Network (OSTI)

Image filtering algorithms are applied on images to remove the different types of noise that are either present in the image during capturing or injected in to the image during transmission. Underwater images when captured usually have Gaussian noise, speckle noise and salt and pepper noise. In this work, five different image filtering algorithms are compared for the three different noise types. The performances of the filters are compared using the Peak Signal to Noise Ratio (PSNR) and Mean Square Error (MSE). The modified spatial median filter gives desirable results in terms of the above two parameters for the three different noise. Forty underwater images are taken for study.

Padmavathi, Dr G; Kumar, Mr M Muthu; Thakur, Suresh Kumar

2009-01-01T23:59:59.000Z

260

R&D Activity Investments and Macroeconomic Determinant Factors.  

E-Print Network (OSTI)

?? Investments in R&D activities are essential to firms. Decisions to increase or decrease R&D investments may rely according to changes in macroeconomic factors. The… (more)

Gardell, Pierre

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Automatic fish classification for underwater species behavior understanding  

Science Conference Proceedings (OSTI)

The aim of this work is to propose an automatic fish classification system that operates in the natural underwater environment to assist marine biologists in understanding subehavior. Fish classification is performed by combining two types of features: ... Keywords: fish species description and classification

Concetto Spampinato; Daniela Giordano; Roberto Di Salvo; Yun-Heh Jessica Chen-Burger; Robert Bob Fisher; Gayathri Nadarajan

2010-10-01T23:59:59.000Z

262

Color-accurate underwater imaging using perceptual adaptive illumination  

Science Conference Proceedings (OSTI)

Capturing color in water is challenging due to the heavy non-uniform attenuation of light in water across the visible spectrum, which results in dramatic hue shifts toward blue. Yet observing color in water is important for monitoring and surveillance ... Keywords: Accurate colors, Adaptive illumination, Color rendering index, Underwater imaging

Iuliu Vasilescu; Carrick Detweiler; Daniela Rus

2011-10-01T23:59:59.000Z

263

Wormhole-Resilient Secure Neighbor Discovery in Underwater Acoustic Networks  

E-Print Network (OSTI)

is vulnerable to the wormhole attack by which the adversary uses secret wormhole links to make distant nodes, undersea explorations, disaster preven- tion, tactical surveillance, underwater warfare, and so on [3, essentially an out-of-band and low-latency channel, between two distant network locations. They then tunnel

Zhang, Rui

264

Underwater wireless sensor networks: routing issues and future challenges  

Science Conference Proceedings (OSTI)

With the advancements of acoustic modem technology that supports better data rates with reliable communications, current research focuses on algorithms those can support such technology in a better way. During the last two decades, many protocols suggested ... Keywords: acoustic communicaitons, intermettent networks, routing protocols, underwater sensor networks

Muhammad Ayaz; Azween Abdullah

2009-12-01T23:59:59.000Z

265

Underwater 3D Mapping: Experiences and Lessons learned  

Science Conference Proceedings (OSTI)

This paper provides details on the development of a tool to aid in 3D coral reef mapping designed to be operated by a single diver and later integrated into an autonomous robot. We discuss issues that influence the deployment and development of underwater ...

Andrew Hogue; Andrew German; James Zacher; Michael Jenkin

2006-06-01T23:59:59.000Z

266

Underwater wireless communications have witnessed major developments in recent years, especially in the last decade. While the first generation of applications involved just a single transmitter and receiver communicating at low bit-rates, nowadays un-  

E-Print Network (OSTI)

Underwater wireless communications have witnessed major developments in recent years, especially applications range from autonomous observation systems to cooperative missions between autonomous underwater layer for underwater networks. The underwater acoustic channel shows some unique characteristics

Stojanovic, Milica

267

Underwater Noise and the Distribution of Snapping Shrimp with Special Reference to the Asiatic and the Southwest and Central Pacific Areas  

E-Print Network (OSTI)

Six - Section 6.1 UNDERWATER NOISE AND TEE DISTRIBUTION OFOfficor, u. s. NavY Underwater Sound La.borntory COEUTCH - (I D' E NT I N A. ~ . UNDERWATER NOISE Ai'ID TEE DISTRIBUTION

Johnson, Martin W

1944-01-01T23:59:59.000Z

268

Reduction of unsteady underwater propeller forces via active tail articulation  

E-Print Network (OSTI)

This study investigates the use of biologically-inspired tail articulation as a means to reduce unsteady propeller forces and by extension, noise due to stator wake blade interaction. This study is experimental in nature ...

James, Richard A. (Richard Alexander), 1982-

2006-01-01T23:59:59.000Z

269

Active control of underwater propulsor using shape memory alloys  

E-Print Network (OSTI)

The development of a leading edge propeller blade reconfiguration system using Shape Memory Allow (SMA) muscles is presented. This work describes the design and testing of a leading edge flap, which is used to alter the local camber of a propeller blade. The leading edge flap is deflected by SMA wires housed in the blade and maintained in a fixed position with a shaft locking and releasing mechanism. A locking and releasing mechanism is utilized so that constant actuation of the SMAs is not required to maintain leading edge deflection. The profile at 70% span of the propeller blade was used to create a two-dimensional blade for leading edge flap design implementation and load testing. Deflection of up to five degrees was obtained with the final design of the leading edge flap and locking and releasing mechanism. The SMA muscles used to deflect the leading edge were actuated electronically through resistive heating and were controlled by a proportional/integral gain control algorithm with closed-loop feedback from a linear displacement sensor within the blade. With the final design of the leading edge flap and locking and releasing mechanism, a preliminary design for a three-dimensional propeller was created.

Wasylyszyn, Jonathan Allen

2005-12-01T23:59:59.000Z

270

Welding and Repair Technology Center: Underwater Laser Welding Studies  

Science Conference Proceedings (OSTI)

Repair of internal reactor components has been a continuing challenge for the nuclear industry. High radiation levels, underwater environment, and altered material weldability have made traditional repair methods more difficult to use for internal component repair. One of the key issues is to make seal-weld repairs on cracks that might exist due to stress corrosion or fatigue. Sealing of these cracks by welding might be necessary to maintain pressure boundary or flow requirements. During this research pr...

2009-12-21T23:59:59.000Z

271

Data collection, storage, and retrieval with an underwater sensor network  

E-Print Network (OSTI)

In this paper we present a novel platform for underwater sensor networks to be used for long-term monitoring of coral reefs and fisheries. The sensor network consists of static and mobile underwater sensor nodes. The nodes communicate point-to-point using a novel high-speed optical communication system integrated into the TinyOS stack, and they broadcast using an acoustic protocol integrated in the TinyOS stack. The nodes have a variety of sensing capabilities, including cameras, water temperature, and pressure. The mobile nodes can locate and hover above the static nodes for data muling, and they can perform network maintenance functions such as deployment, relocation, and recovery. In this paper we describe the hardware and software architecture of this underwater sensor network. We then describe the optical and acoustic networking protocols and present experimental networking and data collected in a pool, in rivers, and in the ocean. Finally, we describe our experiments with mobility for data muling in this network.

I. Vasilescu; K. Kotay; D. Rus; M. Dunbabin; P. Corke

2005-01-01T23:59:59.000Z

272

Trajectory Design and Implementation for Multiple Autonomous Underwater Vehicles Based on Ocean Model Predictions  

E-Print Network (OSTI)

Underwater Vehicles Based on Ocean Model Predictions Ryan N.Trajectory Design based on Ocean Model Predictions PredictEffective tracking of ocean features Gather specific in situ

2009-01-01T23:59:59.000Z

273

The development of Zero-G class underwater robots: unrestricted attitude control using control moment gyros.  

E-Print Network (OSTI)

??The ‘Zero-G’ is designated as a new class of underwater robot that is capable of unrestricted attitude control. A novel control scheme based on internal… (more)

Thornton, Blair

2006-01-01T23:59:59.000Z

274

P2-28: Characterization of Pores and Cracks in Underwater Welds ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Underwater shielded metal arc wet welding with coated electrodes is a common procedure for in situ repair of structural parts of offshore oil ...

275

Characterisation of long-range horizontal performance of underwater acoustic communication.  

E-Print Network (OSTI)

??Underwater acoustic communication is a rapidly progressing field of technology, largely due to recent advances in low cost and power efficient digital signal processors. Unfortunately,… (more)

Pusey, Grant Mark

2011-01-01T23:59:59.000Z

276

A data link layer in support of swarming of autonomous underwater vehicles.  

E-Print Network (OSTI)

??Communication underwater is challenging because of the inherent characteristics of the media. First, common radio frequency (RF) signals utilized in wireless communications cannot be used… (more)

Jabba Molinares, Daladier

2009-01-01T23:59:59.000Z

277

Caloric expenditure and substrate utilization in underwater treadmill running versus land-based treadmill running.  

E-Print Network (OSTI)

??The objective of this study is to compare the caloric expenditure and oxidative sources of underwater treadmill running and land-based treadmill running at maximal and… (more)

Schaal, Courtney

2009-01-01T23:59:59.000Z

278

An analysis of underwater habitats a development of the outline for aquatectural graphic standards.  

E-Print Network (OSTI)

??In addition to many forms of land-based architecture in this world, there are several instances of underwater habitats. These habitats have implications for space exploration… (more)

Riggin, Daniel

2009-01-01T23:59:59.000Z

279

Decentralized sensor placement and mobile localization on an underwater sensor network with depth adjustment capabilities.  

E-Print Network (OSTI)

??Over 70% of our planet is covered by water. It is widely believed that the underwater world holds ideas and resources that will fuel much… (more)

Detweiler, Carrick (Carrick James)

2010-01-01T23:59:59.000Z

280

On the detection of relativistic magnetic monopoles by deep underwater and underice neutrino telescopes  

E-Print Network (OSTI)

I present here some reflections and very speculative remarks on the detection of relativistic magnetic monopoles by currently operating deep underwater/ice neutrino telescopes.

B. K. Lubsandorzhiev

2005-06-13T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Autonomous adaptive environmental assessment and feature tracking via autonomous underwater vehicles  

E-Print Network (OSTI)

In the underwater environment, spatiotemporally dynamic environmental conditions pose challenges to the detection and tracking of hydrographic features. A useful tool in combating these challenge is Autonomous Adaptive ...

Petillo, Stephanie Marie

282

Hydrodynamic Modeling for Autonomous Underwater Vehicles Using Computational and Semi-Empirical Methods.  

E-Print Network (OSTI)

??Buoyancy driven underwater gliders, which locomote by modulating their buoyancy and their attitude with moving mass actuators and inflatable bladders, are proving their worth as… (more)

Geisbert, Jesse Stuart

2007-01-01T23:59:59.000Z

283

Path planning methods for Autonomous Underwater Vehicles; Path planning methods for AUVs.  

E-Print Network (OSTI)

??From naval operations to ocean science missions, the importance of autonomous vehicles is increasing with the advances in underwater robotics technology. Due to the dynamic… (more)

Yi?it, Konuralp

2011-01-01T23:59:59.000Z

284

Control and guidance systems for the navigation of a biomimetic autonomous underwater vehicle.  

E-Print Network (OSTI)

??The field of Autonomous Underwater Vehicles (AUVs) has increased dramatically in size and scope over the past three decades. Application areas for AUVs are numerous… (more)

Tonello, Alberto

2011-01-01T23:59:59.000Z

285

Virtual Long Baseline (VLBL) autonomous underwater vehicle navigation using a single transponder .  

E-Print Network (OSTI)

??This thesis presents a simulation of autonomous underwater vehicle navigation using a single transponder to create a virtual long baseline (VLBL). Similarly to LBL systems,… (more)

LaPointe, Cara E. G.

2006-01-01T23:59:59.000Z

286

Review of potential impacts to sea turtles from underwater explosive removal of offshore structures  

SciTech Connect

The purpose of this study was to collect and synthesize existing information relevant to the explosive removal of offshore structures (EROS) in aquatic environments. Data sources were organized and summarized by topic - explosive removal methods, physics of underwater explosions, sea turtle resources, documented impacts to sea turtles, and mitigation of effects. Information was gathered via electronic database searches and literature source review. Bulk explosive charges are the most commonly used technique in EROS. While the physical principles of underwater detonations and the propagation of pressure and acoustic waves are well understood, there are significant gaps in the application of this knowledge. Impacts to sea turtles from explosive removal operations may range from non-injurious effects (e.g. acoustic annoyance; mild tactile detection or physical discomfort) to varying levels of injury (i.e. non-lethal and lethal injuries). Very little information exists regarding the impacts of underwater explosions on sea turtles. Effects of explosions on turtles often must be inferred from documented effects to other vertebrates with lungs or other gas-containing organs, such as mammals and most fishes. However, a cautious approach should be used when determining impacts to sea turtles based on extrapolations from other vertebrates. The discovery of beached sea turtles and bottlenose dolphins following an explosive platform removal event in 1986 prompted the initiation of formal consultation between the U.S. Department of the Interior, Minerals Management Service (MMS) and the National Marine Fisheries Service (NMFS), authorized through the Endangered Species Act Section 7, to determine a mechanism to minimize potential impacts to listed species. The initial consultation resulted in a requirement for oil and gas companies to obtain a permit (through separate consultations on a case-by-case basis) prior to using explosives in Federal waters. Because many offshore structure removal operations are similar, a 'generic' Incidental Take Statement was established by the NMFS that describes requirements to protect sea turtles when an operator's individual charge weights did not exceed 50 lb (23 kg). Requirements associated with the Incidental Take Permit were revised in 2003 and 2006 to accommodate advances in explosive charge technologies, removals of structures in deeper waters, and adequate protection of deep water marine mammal species in Gulf of Mexico waters. Generally, these requirements include pre- and post-detonation visual monitoring using standard surface and aerial survey methods for sea turtles and marine mammals, and, in some scenarios, passive acoustic survey methods for marine mammals within a specified radius from an offshore structure. The survey program has been successful in mitigating impacts to sea turtles associated with EROS. However, even with these protective measures in place, there have been observations of sea turtles affected by explosive platform removals.

Viada, Stephen T. [CSA International, Inc., 759 Parkway Street, Jupiter, FL 33477 (United States)], E-mail: sviada@conshelf.com; Hammer, Richard M. [CSA International, Inc., 759 Parkway Street, Jupiter, FL 33477 (United States)], E-mail: rhammer@conshelf.com; Racca, Roberto [JASCO Research Ltd., Vancouver Island Technology Park, Suite 2101, 4464 Markham Street, Victoria, British Columbia, V8Z 7X8 (Canada)], E-mail: rob@jasco.com; Hannay, David [JASCO Research Ltd., Vancouver Island Technology Park, Suite 2101, 4464 Markham Street, Victoria, British Columbia, V8Z 7X8 (Canada)], E-mail: dave@jasco.com; Thompson, M. John [CSA International, Inc., 759 Parkway Street, Jupiter, FL 33477 (United States)], E-mail: jthompson@conshelf.com; Balcom, Brian J. [CSA International, Inc., 759 Parkway Street, Jupiter, FL 33477 (United States)], E-mail: bbalcom@conshelf.com; Phillips, Neal W. [CSA International, Inc., 759 Parkway Street, Jupiter, FL 33477 (United States)], E-mail: nphillips@conshelf.com

2008-05-15T23:59:59.000Z

287

Underwater photomosaic system $40,000 Sandin is working to develop a new tool to take large-scale  

E-Print Network (OSTI)

Underwater photomosaic system $40,000 Sandin is working to develop a new tool to take large-scale photographs of the underwater environment. The effort comes in capturing many hi-resolution images

Russell, Lynn

288

Data acquisition and analysis of the UNCOSS underwater explosive neutron sensor  

Science Conference Proceedings (OSTI)

The purpose of the FP7 UNCOSS project (Underwater Coastal Sea Surveyor, http://www.uncoss-project.org) is to develop a neutron-based underwater explosive sensor to detect unexploded ordnance lying on the sea bottom. The Associated Particle Technique is used to focus the inspection on a suspicious object located by optical and electromagnetic sensors and to determine if there is an explosive charge inside. This paper presents the data acquisition electronics and data analysis software which have been developed for this project. The electronics digitize and process the signal in real-time based on a field programmable gate array structure to perform precise time-of-flight and gamma-ray energy measurements. UNCOSS software offers the basic tools to analyze the time-of-flight and energy spectra of the interrogated object. It allows to unfold the gamma-ray spectrum into pure elemental count proportions, mainly C, N, O, Fe, Al, Si, and Ca. The C, N, and O count fractions are converted into chemical proportions by taking into account the gamma-ray production cross sections, as well as neutron and photon attenuation in the different shields between the ROV (Remotely Operated Vehicle) and the explosive, such as the explosive iron shell, seawater, and ROV envelop. These chemical ratios are plotted in a two-dimensional (2D) barycentric representation to position the measured point with respect to common explosives. The systematic uncertainty due to the above attenuation effects and counting statistical fluctuations are combined with a Monte Carlo method to provide a 3D uncertainty area in a barycentric plot, which allows to determine the most probable detected materials in view to make a decision about the presence of explosive. (authors)

Carasco, C.; Eleon, C.; Perot, B. [CEA, DEN, Cadarache, Nuclear Measurement Laboratory, F-13108 Saint-Paul-lez-Durance (France); Boudergui, K.; Kondrasovs, V.; Corre, G.; Normand, S.; Sannie, G.; Woo, R.; Bourbotte, J. M. [CEA, LIST, Saclay, F-91191 Gif-sur-Yvette (France)

2011-07-01T23:59:59.000Z

289

ATA: adaptive transmission algorithms for prolonging lifetime in underwater sensor networks  

Science Conference Proceedings (OSTI)

The severe energy constraints of sensors and the unique characteristics of underwater sensor networks (UWSNs) present major challenges for the long-term monitoring applications. This paper proposes two novel adaptive transmission algorithms for UWSNs ... Keywords: algorithms, lifetime, underwater sensor networks

Zhongwen Guo; Jinfeng Dou; Wei Han; Guangxu Zhang; Zhengang Ha

2008-05-01T23:59:59.000Z

290

State of the art in protocol research for underwater acoustic sensor networks  

E-Print Network (OSTI)

Underwater networks of sensors have the potential to enable unexplored applications and to enhance our ability to observe and predict the ocean. In this paper, architectures for twodimensional and three-dimensional underwater sensor networks are proposed. A detailed overview on the current solutions for medium access control, network, and transport layer protocols is given and open research issues are discussed. I.

Ian F. Akyildiz; Dario Pompili; Tommaso Melodia

2007-01-01T23:59:59.000Z

291

Robust servo-control for underwater robots using banks of visual filters  

Science Conference Proceedings (OSTI)

We present an application of machine learning to the semi-automatic synthesis of robust servo-trackers for underwater robotics. In particular, we investigate an approach based on the use of Boosting for robust visual tracking of color objects in an underwater ...

Junaed Sattar; Gregory Dudek

2009-05-01T23:59:59.000Z

292

Routing Algorithms for Delay-insensitive and Delay-sensitive Applications in Underwater Sensor Networks  

E-Print Network (OSTI)

Underwater sensor networks consist of sensors and vehicles deployed to perform collaborative monitoring tasks over a given region. Underwater sensor networks will find applications in oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation, tactical surveillance, and mine reconnaissance. Underwater acoustic networking is the enabling technology for these applications. In this paper, an architecture for three-dimensional underwater sensor networks is considered, and a model characterizing the acoustic channel utilization efficiency is introduced, which allows investigating some fundamental characteristics of the underwater environment. In particular, the model allows setting the optimal packet size for underwater communications given monitored volume, density of the sensor network, and application requirements. Moreover, the problem of data gathering is investigated at the network layer by considering the cross-layer interactions between the routing functions and the characteristics of the underwater acoustic channel. Two distributed routing algorithms are introduced for delay-insensitive and delaysensitive applications. The proposed solutions allow each node to select its next hop, with the objective of minimizing the energy consumption taking the varying condition of the underwater channel and the different application requirements into account. The proposed routing solutions are shown to achieve the performance targets by means of simulation.

Dario Pompili; Tommaso Melodia; Ian F. Akyildiz

2006-01-01T23:59:59.000Z

293

Underwater Maintenance Guide: Revision 2: A Guide to Diving and Remotely-Operated Vehicle Operations for Nuclear Maintenance Personnel  

Science Conference Proceedings (OSTI)

The use of water in nuclear power generating stations, both as an effective radiation barrier and thermal transfer medium, is critical to basic station operations. Consequently, underwater services play an important role in the maintenance and repair of these stations. Revision 2 of this guide expands previous discussions on underwater maintenance and provides new information on underwater welding and cutting operations and tasks.

1994-05-02T23:59:59.000Z

294

BUILDING UNDERWATER AD-HOC NETWORKS AND SENSOR NETWORKS FOR LARGE SCALE REAL-TIME AQUATIC APPLICATIONS  

E-Print Network (OSTI)

BUILDING UNDERWATER AD-HOC NETWORKS AND SENSOR NETWORKS FOR LARGE SCALE REAL-TIME AQUATIC, CT 06269 Gainesville, FL 32611 Abstract-- Large-scale Underwater Ad-hoc Networks (UANET) and Underwater Sensor Networks (UWSN) are novel networking paradigms to explore the uninhabited oceans. How- ever

Cui, Jun-Hong

295

626 IEEE JOURNAL OF OCEANIC ENGINEERING, VOL. 37, NO. 4, OCTOBER 2012 A Novel Blending Technique for Underwater  

E-Print Network (OSTI)

for Underwater Gigamosaicing Ricard Prados, Rafael Garcia, Nuno Gracias, Javier Escartín, and László Neumann underwater photomosaics to small areas de- spite the hundreds of thousands of square meters that modern sur- veys can cover. Large underwater photomosaics are increasingly in demand for the characterization

Escartin, Javier

296

An Underwater Communication and Sensing Testbed in Marina del Rey Andrew Goodney, Young H. Cho, John Heidemann, John Wroclawski  

E-Print Network (OSTI)

An Underwater Communication and Sensing Testbed in Marina del Rey Andrew Goodney, Young H. Cho, and communication underwater is increasingly important to scientists who study the oceans, rivers, and lakes, as government and industry seek to observe, protect, exploit, and control resources underwater. With growing

Heidemann, John

297

A Novel Application of Multivariable L1 Adaptive Control : from Design to Real-Time Implementation on an Underwater Vehicle  

E-Print Network (OSTI)

on an Underwater Vehicle Divine Maalouf1 Vincent Creuze1 and Ahmed Chemori1 Abstract-- This paper presents time in the field of underwater vehicles control. This paper summarizes the implementation and experimental results obtained on a modified version of the AC-ROV underwater vehicle. Various experimental

Paris-Sud XI, Université de

298

Underwater Unmanned Vehicle Boeing gave us the opportunity to compete against the Electrical Engineering Dept. The competition was  

E-Print Network (OSTI)

Underwater Unmanned Vehicle Overview Boeing gave us the opportunity to compete against Underwater Unmanned Vehicles. Basically we had to build remote controlled submarines from the ground up. Objectives To design a Underwater Unmanned Vehicle that meets the following Specs: Has an internal Ballast

Demirel, Melik C.

299

1 Underwater 3D SLAM through Entropy Minimization J.M. Sez, A. Hogue, F. Escolano and M. Jenkin  

E-Print Network (OSTI)

1 Underwater 3D SLAM through Entropy Minimization J.M. Sáez, A. Hogue, F. Escolano and M. Jenkin Underwater 3D SLAM through Entropy Minimization J.M. Sáez*, A. Hogue**, F. Escolano* and M. Jenkin** Underwater 3D SLAM through Entropy Minimization *Robot Vision Group, Dept. de Ciencia de la Computación e

Escolano, Francisco

300

Underwater vehicles: a surprising non time-optimal path This paper deals with the time-optimal problem for  

E-Print Network (OSTI)

Underwater vehicles: a surprising non time-optimal path M. Chyba Abstract This paper deals with the time-optimal problem for a class of underwater vehicles. We prove that if two configurations at rest or an underwater ve- hicle. This problem is a particularly challenging one and has been widely studied during

Sontag, Eduardo

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

3D Underwater Sensor Network Localization Amin Y. Teymorian, Student Member, IEEE, Wei Cheng, Student Member, IEEE,  

E-Print Network (OSTI)

3D Underwater Sensor Network Localization Amin Y. Teymorian, Student Member, IEEE, Wei Cheng, and Zexin Lu, Member, IEEE Abstract--We transform the 3D underwater sensor network (USN) localization termed as Underwater Sensor Positioning (USP). Through extensive simulations, we show that USP has

Cheng, Xiuzhen "Susan"

302

CX-005561: Categorical Exclusion Determination | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5561: Categorical Exclusion Determination 5561: Categorical Exclusion Determination CX-005561: Categorical Exclusion Determination Underwater Active Acoustic Monitoring Support for Marine Hydrokinetic Energy Projects CX(s) Applied: A9, B3.6 Date: 04/06/2011 Location(s): New Hampshire Office(s): Energy Efficiency and Renewable Energy, Golden Field Office Scientific Solutions, Incorporated (SSI) is proposing to use Department of Energy and cost-share funding to further advance its existing Swimmer Detection Sonar Network (SDSN) system in a joint effort with Ocean Renewable Power Company (ORPC) to fully develop, Integrate, test, and operate a full-scale active acoustic monitoring system for Marine Hydrokinetic (MHK) and other offshore renewable energy projects; specifically for monitoring the region surrounding a tidal turbine. The

303

Laser-Induced Underwater Plasma And Its Spectroscopic Applications  

SciTech Connect

Applications of Laser Induced Breakdown Spectroscopy (LIBS) for analysis of immersed solid and soft materials, and for liquid impurities are described. A method for improving the LIBS signal underwater and for obtaining quantitative analyses in presence of strong shot-to-shot variations of the plasma properties is proposed. Dynamic of the gas bubble formed by the laser pulse is also discussed, together with its importance in Double-Pulse (DP) laser excitation. Results of the studies relative to an application of multi-pulse sequence and its effects on the plasma and gas bubble formation are also presented.

Lazic, Violeta [ENEA, FIS-LAS, Via. E. Fermi 45, 00044 Frascati (Italy)

2008-09-23T23:59:59.000Z

304

Towards Localization and Mapping of Autonomous Underwater Vehicles: A Survey  

E-Print Network (OSTI)

Autonomous Underwater Vehicles (AUVs) have been used for a huge number of tasks ranging from commercial, military and research areas etc, while the fundamental function of a successful AUV is its localization and mapping ability. This report aims to review the relevant elements of localization and mapping for AUVs. First, a brief introduction of the concept and the historical development of AUVs is given; then a relatively detailed description of the sensor system used for AUV navigation is provided. As the main part of the report, a comprehensive investigation of the simultaneous localization and mapping (SLAM) for AUVs are conducted, including its application examples. Finally a brief conclusion

Ling Chen; Huosheng Hu

2011-01-01T23:59:59.000Z

305

Antares: Towards a Large Underwater Neutrino Experiment  

E-Print Network (OSTI)

After a long R&D phase to validate its detector concept, the ANTARES (Astronomy with a Neutrino Telescope and Abyss environmental RESearch) collaboration is operating the largest neutrino telescope in the Northern hemisphere, which is close to completion. It is located in the Mediterranean Sea, offshore from Toulon in France at a depth of 2500 m of water which provide a shield from cosmic rays. The detector design is based on the reconstruction of events produced by neutrino interactions. The expected angular resolution for high energy muon neutrinos (E>10 TeV) is less than 0.3 deg. To achieve this good angular resolution, severe requirements on the time resolution of the detected photons and on the determination of the relative position of the detection devices must be reached. The full 12-line detector is planned to be fully operational during this year. At present (April 2008) there are 10 lines taking data plus an instrumented line deployed at the edge of the detector to monitor environmental sea parameters. This paper describes the design of the detector as well as some results obtained during the 2007 5-line run (from March to December).

M. Spurio; for the ANTARES collaboration

2008-05-08T23:59:59.000Z

306

Categorical Exclusion Determinations: Office of Energy Efficiency and  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6, 2011 6, 2011 CX-005698: Categorical Exclusion Determination California-City-Alhambra CX(s) Applied: A9, B2.5, B5.1 Date: 04/06/2011 Location(s): Alhambra, California Office(s): Energy Efficiency and Renewable Energy April 6, 2011 CX-005561: Categorical Exclusion Determination Underwater Active Acoustic Monitoring Support for Marine Hydrokinetic Energy Projects CX(s) Applied: A9, B3.6 Date: 04/06/2011 Location(s): New Hampshire Office(s): Energy Efficiency and Renewable Energy, Golden Field Office April 5, 2011 CX-005709: Categorical Exclusion Determination Florida-City-Palm Bay CX(s) Applied: A1, A9, A11, B1.32, B2.5, B5.1 Date: 04/05/2011 Location(s): Palm Bay, Florida Office(s): Energy Efficiency and Renewable Energy April 5, 2011 CX-005567: Categorical Exclusion Determination

307

Impacts of Bottom Trawling on Underwater Cultural Heritage  

E-Print Network (OSTI)

The fishing method of trawling, or dragging, has long been shown to be harmful to a plethora of sea life inhabiting the world?s oceans and inland waterways. Fishing nets scour the seabed, disturbing everything in their path, while usually in search of only one type of bottom-dwelling species. Impacts to the seafloor include a removal of topographic features, disturbance of the upper sediment layers, including deep furrows, as well as physical and chemical changes to sediment morphology. While biological organisms and communities can potentially recover from this destruction, archaeological data cannot. Fishermen have been raising important artifacts in their nets for over a century. These finds have helped archaeologists locate significant sites, but they also have the adverse effect of irreparably damaging these sites. This thesis explores the impacts of bottom trawling on underwater cultural heritage. The methods and gear used by trawlers and their documented effects upon the sea floor are identified. Examples of the types of damage shipwreck sites receive after being impacted by trawling are presented. Instances where fishermen have raised prehistoric artifacts from inundated land sites are also introduced. The fishing and archaeological communities must cooperate to limit further damage to underwater cultural heritage around the globe.

Atkinson, Christopher

2012-05-01T23:59:59.000Z

308

Atmospheric Muon Flux at Sea Level, Underground, and Underwater  

E-Print Network (OSTI)

The vertical sea-level muon spectrum at energies above 1 GeV and the underground/underwater muon intensities at depths up to 18 km w.e. are calculated. The results are particularly collated with a great body of the ground-level, underground, and underwater muon data. In the hadron-cascade calculations, the growth with energy of inelastic cross sections and pion, kaon, and nucleon generation in pion-nucleus collisions are taken into account. For evaluating the prompt muon contribution to the muon flux, we apply two phenomenological approaches to the charm production problem: the recombination quark-parton model and the quark-gluon string model. To solve the muon transport equation at large depths of homogeneous medium, a semi-analytical method is used. The simple fitting formulas describing our numerical results are given. Our analysis shows that, at depths up to 6-7 km w. e., essentially all underground data on the muon intensity correlate with each other and with predicted depth-intensity relation for conventional muons to within 10%. However, the high-energy sea-level data as well as the data at large depths are contradictory and cannot be quantitatively decribed by a single nuclear-cascade model.

E. V. Bugaev; A. Misaki; V. A. Naumov; T. S. Sinegovskaya; S. I. Sinegovsky; N. Takahashi

1998-03-30T23:59:59.000Z

309

Coordination of an underwater glider fleet for adaptive sampling  

E-Print Network (OSTI)

Prediction (ASAP) projects aim to develop a sustainable, portable, adaptive ocean observing and prediction system for use in coastal environments. These projects employ, among other observation platforms, autonomous underwater vehicles that carry sensors to measure physical and biological signals in the ocean. The measurements from all sensing platforms are assimilated in real-time into advanced ocean models. The objective is to coordinate the mobile assets in order to collect data of highest possible utility. Critical to this effort are reliable, efficient and adaptive control strategies to enable the mobile sensor platforms to collect data autonomously. In this paper, we summarize feedback control strategies that enable us to gather useful information over a wide spectrum of spatial and temporal scales. First, we design formation control strategies useful for sampling small spatial scale processes (less than 5 km). In this framework, the feedback control laws maintain a desired formation of vehicles and allow the group to locate interesting features in the ocean. Some of these control strategies were implemented on a group of underwater gliders in Monterey Bay in August 2003, as part of the AOSN-II project. Second, we direct mobile sensor networks to provide synoptic coverage to investigate

Pradeep Bhatta; Edward Fiorelli; Francois Lekien; Naomi E. Leonard; Derek A. Paley; Fumin Zhang; Ralf Bachmayer; Russ E. Davis; David M. Fratantoni; Rodolphe Sepulchre

2005-01-01T23:59:59.000Z

310

CX-009578: Categorical Exclusion Determination | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

78: Categorical Exclusion Determination 78: Categorical Exclusion Determination CX-009578: Categorical Exclusion Determination Advancement of the Kinetic Hydropower System (KHPS) to DOE TRL 7/8 CX(s) Applied: A9, B3.6, B3.16 Date: 12/13/2012 Location(s): New York Offices(s): Golden Field Office The U.S. DOE is proposing to provide federal funding to Verdant Power, Inc. to conduct research, development and environmental monitoring activities to advance the design of a Kinetic Hydropower System. DOE funding would be used for Phase 1 only, which includes environmental compliance and monitoring of existing in-water instrumentation, development of a conceptual plan for underwater sound monitoring, composite blade turbine testing and other information gathering tasks. CX-009578.pdf More Documents & Publications

311

Oil/gas collector/separator for underwater oil leaks  

DOE Patents (OSTI)

This invention is comprised of an oil/gas collector/separator for recovery of oil leaking, for example, from an offshore or underwater oil well. The separator is floated over the point of the leak and tethered in place so as to receive oil/gas floating, or forced under pressure, toward the water surface from either a broken or leaking oil well casing, line, or sunken ship. The separator is provided with a downwardly extending skirt to contain the oil/gas which floats or is forced upward into a dome wherein the gas is separated from the oil/water, with the gas being flared (burned) at the top of the dome, and the oil is separated from water and pumped to a point of use. Since the density of oil is less than that of water it can be easily separated from any water entering the dome.

Henning, C.D.

1992-12-31T23:59:59.000Z

312

Underwater acoustic navigation with the WHOI micro-modem  

E-Print Network (OSTI)

Abstract — The WHOI Micro-Modem is a compact, low-power acoustic transceiver that can provide both acoustic telemetry and navigation. Its size and versatility make it ideal for integration in autonomous underwater vehicles (AUVs). The modem supports the use of both broadband and narrowband transponders for long baseline navigation systems, has a modem-to-modem ranging capability, and can be configured to provide synchronous oneway ranging, when integrated with a precision clock. This paper gives an overview of the different navigation systems supported by the Micromodem and presents the results from field tests conducted on the SeaBED AUV in deployments in Greece, the Bluefin AUV, and whale localizations in the Stellwagen Bank Marine Sanctuary. I.

Ipa Singh; Matthew Grund; Brian Bingham; Ryan Eustice; Hanumant Singh; Lee Freitag

2006-01-01T23:59:59.000Z

313

Oil/gas collector/separator for underwater oil leaks  

DOE Patents (OSTI)

An oil/gas collector/separator for recovery of oil leaking, for example, from an offshore or underwater oil well. The separator is floated over the point of the leak and tethered in place so as to receive oil/gas floating, or forced under pressure, toward the water surface from either a broken or leaking oil well casing, line, or sunken ship. The separator is provided with a downwardly extending skirt to contain the oil/gas which floats or is forced upward into a dome wherein the gas is separated from the oil/water, with the gas being flared (burned) at the top of the dome, and the oil is separated from water and pumped to a point of use. Since the density of oil is less than that of water it can be easily separated from any water entering the dome.

Henning, Carl D. (Livermore, CA)

1993-01-01T23:59:59.000Z

314

Use of high performance computing resources for underwater acoustic modeling.  

Science Conference Proceedings (OSTI)

The majority of standard underwater propagation models provide a two?dimensional (range and depth) acoustic field for a single frequency point source. Computational resource demand increases considerably when the three?dimensional acoustic field of a broad?band spatially extended source is of interest. An upgrade of the standard parabolic equationmodel RAM for use in a high?performance computing (HPC) environment is discussed. A benchmarked upgraded version of RAM is used in the Louisiana Optical Network Initiative HPC?environment to model the three?dimensional acoustic field of a seismic airgun array. Four?dimensional visualization (time and space) of the generated data volume is also addressed. [Research supported by the Louisiana Optical Network Initiative

Anca M. Niculescu; Natalia A. Sidorovskaia; Peter Achi; Arslan M. Tashmukhambetov; George E. Ioup; Juliette W. Ioup

2009-01-01T23:59:59.000Z

315

SNG completes deepest underwater pipelay in Gulf of Mexico  

SciTech Connect

This paper reports that gas began flowing this spring in the deepest underwater, large-diameter pipeline in the U.S. Gulf of Mexico. Water depth along the route of the pipeline varies from approximately 460 ft at the Alabaster platform, increasing to the record depth of 1,220 ft in the Mississippi Canyon area, and decreasing to negligible water depth at the landfall site southwest of Venice. The SNG Mississippi Canyon Block 397 pipeline project exemplifies how a pipeline project can encounter an array of conditions which prompt special design considerations and installation techniques. Important considerations for this project were related to pipe properties, anti-corrosion and weight coatings, span and buckle considerations, and installation equipment. A team effort was used to study, research, test, design, and install this pipeline.

Vogt, G.B. (Project Consulting Services Inc., Metairie, LA (US))

1992-08-24T23:59:59.000Z

316

''Water bath'' effect during the electrical underwater wire explosion  

SciTech Connect

The results of a simulation of underwater electrical wire explosion at a current density >10{sup 9} A/cm{sup 2}, total discharge current of {approx}3 MA, and rise time of the current of {approx}100 ns are presented. The electrical wire explosion was simulated using a one-dimensional radiation-magnetohydrodynamic model. It is shown that the radiation of the exploded wire produces a thin conducting plasma shell in the water in the vicinity of the exploding wire surface. It was found that this plasma shell catches up to 30% of the discharge current. Nevertheless, it was shown that the pressure and temperature of the wire material remain unchanged as compared with the idealized case of the electrical wire explosion in vacuum. This result is explained by a 'water bath' effect.

Oreshkin, V. I.; Chaikovsky, S. A.; Ratakhin, N. A.; Grinenko, A.; Krasik, Ya. E. [High Current Electronic Institute SB RAS, Tomsk (Russian Federation); Physics Department, Technion, Haifa 32000 (Israel)

2007-10-15T23:59:59.000Z

317

Expected Muon Energy Spectra and Zenithal Distributions Deep Underwater  

E-Print Network (OSTI)

Energy spectra and zenith angle distributions of atmospheric muons are calculated for the depths of operation of large underwater neutrino telescopes. The estimation of the prompt muon contribution is performed with three approaches to charm hadroproduction: recombination quark-parton model, quark-gluon string model, and perturbative QCD based models. Calculations show that the larger are zenith angles and water thickness above the detector, the lower is the energy at which the prompt muon flux becomes equal to conventional one (``crossing energy'') . For instance, for the depth of the Baikal Neutrino Telescope and for zenith angle of 78 degrees the crossing energy is about 300 TeV, whereas it is only 8 TeV for the NESTOR depth. Nevertheless, the muon flux of the crossing energy at NESTOR depth is in order of magnitude lower in comparison with the Baikal depth.

A. Misaki; V. A. Naumov; T. S. Sinegovskaya; S. I. Sinegovsky; N. Takahashi

1999-05-19T23:59:59.000Z

318

AMOUR V: A Hovering Energy Efficient Underwater Robot Capable of Dynamic Payloads  

Science Conference Proceedings (OSTI)

In this paper we describe the design and control algorithms of AMOUR, a low-cost autonomous underwater vehicle (AUV) capable of missions of marine survey and monitoring. AMOUR is a highly maneuverable robot capable of hovering and carrying ...

Iuliu Vasilescu; Carrick Detweiler; Marek Doniec; Daniel Gurdan; Stefan Sosnowski; Jan Stumpf; Daniela Rus

2010-04-01T23:59:59.000Z

319

Complete SE[superscript 3] underwater robot control with arbitrary thruster configurations  

E-Print Network (OSTI)

e present a control algorithm for autonomous underwater robots with modular thruster configuration. The algorithm can handle arbitrary thruster configurations. It maintains the robot's desired attitude while solving for ...

Doniec, Marek Wojciech

320

Development and validation of a conceptual design program for unmanned underwater vehicles  

E-Print Network (OSTI)

With a renewed focus on the Asia-Pacific region, the United States Navy will increasingly rely on high-endurance unmanned underwater vehicles (UUVs) to support successful operations in a challenging threat environment. ...

Laun, Alexander Walter, Ensign

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Dynamic response and maneuvering strategies of a hybrid autonomous underwater vehicle in hovering  

E-Print Network (OSTI)

The Odyssey IV autonomous underwater vehicle (AUV) is the next generation of unmanned subsurface robots from the MIT Sea Grant AUV Laboratory. The Odyssey IV AUV has a novel propulsion system, which includes a pair of ...

Cooney, Lauren Alise

2009-01-01T23:59:59.000Z

322

Verification of a six-degree of freedom simulation model for the REMUS autonomous underwater vehicle  

E-Print Network (OSTI)

mproving the performance of modular, low-cost autonomous underwater vehicles (AUVs) in such applications as long-range oceanographic survey, autonomous docking, and shallow-water mine countermeasures requires improving the ...

Prestero, Timothy (Timothy Jason), 1970-

2001-01-01T23:59:59.000Z

323

Acoustic Doppler Velocimeter Flow Measurement from an Autonomous Underwater Vehicle with Applications to Deep Ocean Convection  

Science Conference Proceedings (OSTI)

The authors present a new modality for direct measurement of ocean flow, achieved by combining the resolution and precision of an acoustic Doppler velocimeter with the mobility of an autonomous underwater vehicle. To obtain useful measurements, ...

Yanwu Zhang; Knut Streitlien; James G. Bellingham; Arthur B. Baggeroer

2001-12-01T23:59:59.000Z

324

13.49 Maneuvering and Control of Surface and Underwater Vehicles, Fall 2000  

E-Print Network (OSTI)

Maneuvering motions of surface and underwater vehicles. Derivation of equations of motion, hydrodynamic coefficients. Memory effects. Linear and nonlinear forms of the equations of motion. Control surfaces modeling and ...

Triantafyllou, Michael S.

325

K-distribution fading models for Bayesian estimation of an underwater acoustic channel  

E-Print Network (OSTI)

Current underwater acoustic channel estimation techniques generally apply linear MMSE estimation. This approach is optimal in a mean square error sense under the assumption that the impulse response fluctuations are well ...

Laferriere, Alison Beth

2011-01-01T23:59:59.000Z

326

Development of a New Underwater Bathymetric Laser Imaging System: L-Bath  

Science Conference Proceedings (OSTI)

The design, construction, and performance of a new high-resolution underwater bathymetric prototype system (L-Bath) with extended imaging capability is presented. The design offers simultaneous reflectance and depth information on a pixel-by-...

Karl D. Moore; Jules S. Jaffe; Benjamin L. Ochoa

2000-08-01T23:59:59.000Z

327

Acoustical Rainfall Analysis: Rainfall Drop Size Distribution Using the Underwater Sound Field  

Science Conference Proceedings (OSTI)

Rainfall estimation is difficult, especially in oceanic regions where land-based techniques are unavailable. Fortunately, rain produces a loud and unique sound underwater that can be used to detect and quantify rainfall. Laboratory studies of the ...

Jeffrey A. Nystuen

1996-02-01T23:59:59.000Z

328

Underwater acoustic signal separation based on prior estimation of the channel impulse response  

Science Conference Proceedings (OSTI)

An underwater acoustic signals separation method based on prior information about the channel impulse response (IR) is presented. Using a sound speed profile measured in a real world environment, the IR of the ocean is estimated with normal mode theory ...

S. Bonnifay; K. Yao; C. Jutten

2000-06-01T23:59:59.000Z

329

Remote Real-Time Video-Enabled Docking for Underwater Autonomous Platforms  

Science Conference Proceedings (OSTI)

One of the key challenges in the development and implementation of ocean observatories is sustained observations over relevant temporal and spatial scales. Autonomous underwater vehicles (AUVs) have demonstrated their potential for synoptic ...

Mark A. Moline; Oscar Schofield

2009-12-01T23:59:59.000Z

330

Development of a porous piezoresistive material and its applications to underwater pressure sensors and tactile sensors  

E-Print Network (OSTI)

MEMS (Microelectromechanical System) pressure sensor arrays are gaining attention in the field of underwater navigation because they are seen as alternatives to current sonar and vision-based systems that fail to navigate ...

Woo, Mun Ee

2013-01-01T23:59:59.000Z

331

Design and analysis of a high-rate acoustic link for underwater video transmission  

E-Print Network (OSTI)

A high bit rate acoustic link for underwater video transmission is examined. Currently, encoding standards support video transmission at bit rates as low as 64 kbps. While this rate is still above the limit of commercially ...

Pelekanakis, Konstantinos

2004-01-01T23:59:59.000Z

332

A flexible underwater pressure sensor array for artificial lateral line applications  

E-Print Network (OSTI)

This thesis develops a flexible elastomer-based underwater pressure sensor array. When mounted onto the hull of an aquatic vehicle, the array enables obstacle detection, identification and tracking, and can help the vehicle ...

Yaul, Frank M

2011-01-01T23:59:59.000Z

333

Multi-hop routing is order-optimal in underwater extended networks  

E-Print Network (OSTI)

Capacity scaling laws are analyzed in an underwater acoustic network with n regularly located nodes. A narrow-band model is assumed where the carrier frequency is allowed to scale as a function of n. In the network, we ...

Shin, Won-Yong

334

On Joint Frequency and Power Allocation in a Cross-Layer Protocol for Underwater Acoustic Networks  

E-Print Network (OSTI)

Path loss in an underwater acoustic channel depends not only on the transmission distance, but also on the signal frequency. As a result, the useful bandwidth decreases with distance, a feature not normally present in ...

Jornet, Josep Miquel

335

Autonomous underwater data muling using wireless optical communication and agile AUV control  

E-Print Network (OSTI)

Underwater exploration and surveillance currently relies on subsea cables and tethers to relay data back to the user. The cause for this is that water heavily absorbs most electromagnetic signals, preventing effective radio ...

Doniec, Marek Wojciech

2013-01-01T23:59:59.000Z

336

Biomimetic oscillating foil propulsion to enhance underwater vehicle agility and maneuverability  

E-Print Network (OSTI)

Inspired by the swimming abilities of marine animals, this thesis presents "Finnegan the RoboTurtle", an autonomous underwater vehicle (AUV) powered entirely by four flapping foils. Biomimetic actuation is shown to produce ...

Licht, Stephen Carl

2008-01-01T23:59:59.000Z

337

Rex 2 : design, construction, and operation of an unmanned underwater vehicle  

E-Print Network (OSTI)

The practical usage of unmanned underwater vehicles (UUVs) is limited by vehicle and operation cost, difficulty in accurate navigation, and communication between the vehicle and operator. The "Rex 2" UUV employs a system ...

Owens, Dylan

2009-01-01T23:59:59.000Z

338

Collection of Water Samples from an Autonomous Underwater Vehicle for Tracer Analysis  

Science Conference Proceedings (OSTI)

A compact water sampler rated to full ocean depth has been deployed from an autonomous underwater vehicle (AUV) to enable oceanographic tracer measurements. Techniques developed to allow the instrument to collect up to 49 samples of sufficient ...

Paul A. Dodd; Martin R. Price; Karen J. Heywood; Miles Pebody

2006-12-01T23:59:59.000Z

339

Aquatecture : underwater dwellings and sea born structures as paradigms of design  

E-Print Network (OSTI)

There are many reasons for undertaking a work such as this. Among them are the benefits offered to society when we acknowledge the potential of submersible structures, The provision of habitable underwater space remains ...

Guillermo, Ricardo

1982-01-01T23:59:59.000Z

340

Multi-Modal Local Sensing and Communication for Collective Underwater Systems  

E-Print Network (OSTI)

This paper is devoted to local sensing and communication for collective underwater systems used in networked and swarm modes. It is demonstrated that a specific combination of modal and sub-modal communication, used simultaneously for robot-robot and robot-object detection, can create a dedicated cooperation between multiple AUVs. These technologies, platforms and experiments are shortly described, and allow us to make a conclusion about useful combinations of different signaling approaches for collective underwater systems.

Kernbach, Serge; Sutantyo, Donny

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Neutron activation analysis for reference determination of the implantation dose of cobalt ions  

Science Conference Proceedings (OSTI)

The authors prepared depth profilling reference materials by cobalt ion implantation at an ion energy of 300 keV into n-type silicon. The implanted Co dose was then determined by instrumental neutron activation analysis (INAA) giving an analytical dynamic range of almost 5 decades and uncertainty of 1.5%. This form of analysis allows sources of error (beam spreading, misalignment) to be corrected. 70 refs., 3 tabs.

Garten, R.P.H. [Max-Planck-Institut fuer Metallforschung, Dortmund (Germany); Bubert, H. [Institut fuer Spektrochemie und angewandte Spektrokopie, Dortmund (Germany); Palmetshofer, L. [Johannes-Kepler-Universitaet, Linz (Australia)

1992-05-15T23:59:59.000Z

342

HIERARCHICAL HYBRID-MODEL BASED DESIGN, VERIFICATION, SIMULATION, AND SYNTHESIS OF MISSION CONTROL FOR AUTONOMOUS UNDERWATER VEHICLES.  

E-Print Network (OSTI)

??The objective of modeling, verification, and synthesis of hierarchical hybrid mission control for underwater vehicle is to (i) propose a hierarchical architecture for mission control… (more)

Bhattacharyya, Siddhartha

2005-01-01T23:59:59.000Z

343

Characterization of converging shock waves generated by underwater electrical wire array explosion  

SciTech Connect

Results of {approx}200 kbar pressure generation at 50 {mu}m distance from the implosion axis of the converging shock wave produced by an underwater electrical explosion of a cylindrical wire array are reported. The array was exploded using a submicrosecond high-current generator (stored energy of {approx}4.2 kJ, current amplitude of {approx}325 kA, rise time of {approx}1 {mu}s). Multiframe shadow imaging of the shock wave was used to determine its time of flight. These data were applied for calculating the pressure at the vicinity of the implosion axis using one dimensional hydrodynamic calculations and the Whitham approach. However, it was found that in the case of wire array radius {<=}5 mm, multiframe imaging cannot be used at the final stage of the shock wave implosion because of possible changes in the optical properties of the water. Optical and spectroscopic methods based on either the change in the refraction index of the optical fiber or spectroscopy of the plasma formed inside the capillary placed at the implosion axes were used for shock wave characterization. A satisfactory agreement was found between the results obtained by these methods.

Efimov, S.; Fedotov, A.; Gleizer, S.; Gurovich, V. Tz.; Bazalitski, G.; Krasik, Ya. E. [Department of Physics, Technion, 32000 Haifa (Israel)

2008-11-15T23:59:59.000Z

344

Generation of extreme state of water by spherical wire array underwater electrical explosion  

SciTech Connect

The results of the first experiments on the underwater electrical explosion of a spherical wire array generating a converging strong shock wave are reported. Using a moderate pulse power generator with a stored energy of {<=}6 kJ and discharge current of {<=}500 kA with a rise-time of {approx}300 ns, explosions of Cu and Al wire arrays of different diameters and with a different number and diameter of wires were tested. Electrical, optical, and destruction diagnostics were used to determine the energy deposited into the array, the time-of-flight of the shock wave to the origin of the implosion, and the parameters of water at that location. The experimental and numerical simulation results indicate that the convergence of the shock wave leads to the formation of an extreme state of water in the vicinity of the implosion origin that is characterized by pressure, temperature, and compression factors of (2 {+-} 0.2) Multiplication-Sign 10{sup 12} Pa, 8 {+-} 0.5 eV, and 7 {+-} 0.5, respectively.

Antonov, O.; Gilburd, L.; Efimov, S.; Bazalitski, G.; Gurovich, V. Tz.; Krasik, Ya. E. [Physics Department, Technion, Haifa 3200 (Israel)

2012-10-15T23:59:59.000Z

345

Active Interrogation Observables for Enrichment Determination of DU Shielded HEU Metal Assemblies with Limited Geometrical Information  

SciTech Connect

Determining the enrichment of highly enriched uranium (HEU) metal assemblies shielded by depleted uranium (DU) proves a unique challenge to currently employed measurement techniques. Efforts to match time-correlated neutron distributions obtained through active interrogation to Monte Carlo simulations of the assemblies have shown promising results, given that the exact geometries of both the HEU metal assemblies and DU shields are known from imaging and fission site mapping. In certain situations, however, it is desirable to obtain enrichment with limited or no geometrical information of the assemblies being measured. This paper explores the possibility that the utilization of observables in the interrogation of assemblies by time-tagged D-T neutrons, including time-correlated distribution of neutrons and gammas using liquid scintillators operating on the fission chain time scale, can lead to enrichment determination without a complete set of geometrical information.

Pena, Kirsten E [ORNL; McConchie, Seth M [ORNL; Crye, Jason Michael [ORNL; Mihalczo, John T [ORNL

2011-01-01T23:59:59.000Z

346

On the Order Optimality of Large-scale Underwater Networks  

E-Print Network (OSTI)

Capacity scaling laws are analyzed in an underwater acoustic network with $n$ regularly located nodes on a square, in which both bandwidth and received signal power can be limited significantly. A narrow-band model is assumed where the carrier frequency is allowed to scale as a function of $n$. In the network, we characterize an attenuation parameter that depends on the frequency scaling as well as the transmission distance. Cut-set upper bounds on the throughput scaling are then derived in both extended and dense networks having unit node density and unit area, respectively. It is first analyzed that under extended networks, the upper bound is inversely proportional to the attenuation parameter, thus resulting in a highly power-limited network. Interestingly, it is seen that the upper bound for extended networks is intrinsically related to the attenuation parameter but not the spreading factor. On the other hand, in dense networks, we show that there exists either a bandwidth or power limitation, or both, ac...

Shin, Won-Yong; Medard, Muriel; Stojanovic, Milica; Tarokh, Vahid

2011-01-01T23:59:59.000Z

347

Boussinesq modeling of surface waves due to underwater landslides  

E-Print Network (OSTI)

Consideration is given to the influence of an underwater landslide on waves at the surface of a shallow body of fluid. The equations of motion which govern the evolution of the barycenter of the landslide mass include various dissipative effects due to bottom friction, internal energy dissipation, and viscous drag. The surface waves are studied in the Boussinesq scaling, with time-dependent bathymetry. A numerical model for the Boussinesq equations is introduced which is able to handle time-dependent bottom topography, and the equations of motion for the landslide and surface waves are solved simultaneously. The numerical solver for the Boussinesq equations can also be restricted to implement a shallow-water solver, and the shallow-water and Boussinesq configurations are compared. A particular bathymetry is chosen to illustrate the general method, and it is found that the Boussinesq system predicts larger wave run-up than the shallow-water theory in the example treated in this paper. It also found that the fi...

Dutykh, Denys

2013-01-01T23:59:59.000Z

348

Experiments with Underwater Robot Localization and Tracking Peter Corke, Carrick Detweiler, Matthew Dunbabin, Michael Hamilton,Daniela Rus and Iuliu Vasilescu  

E-Print Network (OSTI)

Experiments with Underwater Robot Localization and Tracking Peter Corke, Carrick Detweiler, Matthew of underwater robot localization are compared. The first method is based on a geometric approach in which, and a comparison of acoustic and visual methods for underwater operation. I. INTRODUCTION Performing reliable

Hamilton, Michael P.

349

http://www.digitalocean.eu : FP7 262160 (2010-2012) Human-Robot-Interfaces based on Mixed Reality for Underwater Robot  

E-Print Network (OSTI)

for Underwater Robot Teleoperation Christophe Domingues*, Mouna Essabbah*, Nader Cheaib* and Samir Otmane* Alain two Human-Robot interfaces for underwater robot teleoperation. This work is in the context of the Digital Ocean Europe project1 that aims at digitalizing seafloor sites in 3D imagery using underwater

Paris-Sud XI, Université de

350

A Single-armed Manta-board as a New Diver-controlled Planing Board and Its Use for Underwater Surveys  

E-Print Network (OSTI)

A Single-armed Manta-board as a New Diver-controlled Planing Board and Its Use for Underwater, Australia. Abstract-Due to inadequacies ofprevi ous underwater towing techniques and the special needs of a recent underwater sur vey, a modified mania-board technique was developed. With this new technique

351

Acoustic Timing Simulation of Active Beacons for  

E-Print Network (OSTI)

A simulation of freely-deployed active underwater beacons to estimate the tow path of a Synthetic Aperture Sonar (SAS) towfish is presented. Knowledge of the tow path allows the removal of motion induced blurring in the SAS images. The beacons sit on the seabed listening for acoustic chirps from the sonar and retransmit back in a different frequency band after a fixed time delay. After reconstruction the beacons appear in the SAS image as point-source targets, blurred by towfish motion, from which the tow-path can be determined by triangulation. The effect of reconstructing the continuous towfish motion as discrete along-track `hops' is also investigated. Simulations of a towfish path with 20 cm sway amplitude and typical measurement timing errors show a significant improvement in image quality using two active beacons.

Measuring The Tow-Path; Edward N. Pilbrow; Michael P. Hayes

2003-01-01T23:59:59.000Z

352

Analysis of particle penetration into aluminum plate using underwater shock wave  

Science Conference Proceedings (OSTI)

Some techniques using underwater shock waves have been developed for several material processing applications: explosive welding, shock compaction, and shock synthesis. In this research, a new technique was developed for surface modification of an aluminum plate. Diamond particles were accelerated by an underwater shock wave and penetrated into an aluminum plate, creating a surface coating of diamond on the aluminum plate. In the observation of the cross-section of the recovered Al-diamond composite, a rich diamond layer was confirmed at about 200 {mu}m depth. XRD and wear measurements were conducted for the recovered Al-diamond composite. We also report on the optical observation of the underwater shock wave in this paper.

Tanaka, S. [Faculty of engineering, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555 (Japan); Hokamoto, K.; Itoh, S. [Shock Wave and Condensed Matter Research Center, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555 (Japan)

2007-12-12T23:59:59.000Z

353

On wormhole attacks in underwater sensor networks: A two-tier localization approach  

E-Print Network (OSTI)

Under-Water Sensor Network (UWSN) is a novel networking paradigm to explore the uninhabited oceans. However, the characteristics of this new network, such as huge propagation delay, floating node mobility, and limited acoustic link capacity, are significantly different from land-based sensor networks. In this paper we show that underwater denial-of-service attack imposes great threats to any UWSN. Without proper countermeasures, underwater sensor networking is a mission impossible. We propose a localization based approach to answer the challenge. In our design, DUB and DDB, a pair of efficient single-round distance measuring schemes, are critical building blocks to realize our approach inspite of constrained node capability and floating node mobility. In addition, to cope with low/medium node mobiltiy, we propose a two-tier localization scheme to identify short-range wormholes instantly, and long-haul wormholes within a limited latency. Our simulation and implementation confirm the effectiveness of our design. I.

Jiejun Kong; Zhengrong Ji; Weichao Wang; Mario Gerla; Rajive Bagrodia

2004-01-01T23:59:59.000Z

354

Review Article Underwater Image Processing: State of the Art of Restoration and Image Enhancement Methods  

E-Print Network (OSTI)

License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The underwater image processing area has received considerable attention within the last decades, showing important achievements. In this paper we review some of the most recent methods that have been specifically developed for the underwater environment. These techniques are capable of extending the range of underwater imaging, improving image contrast and resolution. After considering the basic physics of the light propagation in the water medium, we focus on the different algorithms available in the literature. The conditions for which each of them have been originally developed are highlighted as well as the quality assessment methods used to evaluate their performance. 1.

Raimondo Schettini; Silvia Corchs

2010-01-01T23:59:59.000Z

355

Advances in Conjugated Linoleic Acid Research, Volume 3 Chapter 10 Antioxidative Activity of Conjugated Linoleic Acid Determined by ESR  

Science Conference Proceedings (OSTI)

Advances in Conjugated Linoleic Acid Research, Volume 3 Chapter 10 Antioxidative Activity of Conjugated Linoleic Acid Determined by ESR Health Nutrition Biochemistry eChapters Health - Nutrition - Biochemistry Press  

356

Remote robotic underwater grinding system and modeling for rectification of hydroelectric structures  

Science Conference Proceedings (OSTI)

A submersible grinding robot has been designed to automate the dam gate metallic structure repair process. In order to measure and control the amount of material removed during the process, an empirical approach for modeling the material removal rate ... Keywords: Air injector, Grinding modeling, Material removal rate (MRR), Robotic grinding, Underwater grinding process, Water drag effect

Dominique Thuot; Zhaoheng Liu; Henri Champliaud; Julien Beaudry; Pierre-Luc Richard; Michel Blain

2013-02-01T23:59:59.000Z

357

Depth control of remotely operated underwater vehicles using an adaptive fuzzy sliding mode controller  

Science Conference Proceedings (OSTI)

Sliding mode control, due to its robustness against modelling imprecisions and external disturbances, has been successfully employed to the dynamic positioning of remotely operated underwater vehicles. In order to improve the performance of the complete ... Keywords: Adaptive algorithms, Depth control, Fuzzy logic, Nonlinear control, Remotely operated vehicles, Sliding modes

Wallace M. Bessa; Max S. Dutra; Edwin Kreuzer

2008-08-01T23:59:59.000Z

358

An adaptive fuzzy sliding mode controller for remotely operated underwater vehicles  

Science Conference Proceedings (OSTI)

Sliding mode control is a very attractive control scheme because of its robustness against both structured and unstructured uncertainties as well as external disturbances. In this way, it has been widely employed for the dynamic positioning of remotely ... Keywords: Adaptive algorithms, Dynamic positioning, Fuzzy logic, Remotely operated underwater vehicles, Sliding modes

Wallace M. Bessa; Max S. Dutra; Edwin Kreuzer

2010-01-01T23:59:59.000Z

359

An Evaluation of the WOTAN Technique of Inferring Oceanic Winds from Underwater Ambient Sound  

Science Conference Proceedings (OSTI)

The potential of the WOTAN technique to estimate oceanic winds from underwater ambient sound is thoroughly evaluated. Anemometer winds and sound spectrum levels at 11 frequencies in the range 3–25 kHz from the FASINEX Experiment are used to ...

Svein Vagle; William G. Large; David M. Farmer

1990-08-01T23:59:59.000Z

360

A Behavioral Probabilistic Risk Assessment Framework for Managing Autonomous Underwater Vehicle Deployments  

Science Conference Proceedings (OSTI)

The deployment of a deep-diving long-range autonomous underwater vehicle (AUV) is a complex operation that requires the use of a risk-informed decision-making process. Operational risk assessment is heavily dependent on expert subjective judgment. ...

Mario Brito; Gwyn Griffiths; James Ferguson; David Hopkin; Richard Mills; Richard Pederson; Erin MacNeil

2012-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Elastic parabolic equation solutions for underwater acoustic problems using seismic sources  

E-Print Network (OSTI)

Elastic parabolic equation solutions for underwater acoustic problems using seismic sources Scott D theoretic methods, and attempts to model them with fluid-bottom parabolic equation solu- tions suggest between elastic and acoustic waves, current elastic parabolic equation solutions must be modified to allow

362

Effects of Channel Estimation Errors in OFDM-MIMO-Based Underwater Communications  

Science Conference Proceedings (OSTI)

State-of-the-art radio communication systems are in a large extent based on multi-carrier communication (OFDM) and multiple antennas (MIMO). In this paper the performance of such systems adapted to an underwater acoustic communication channel is assessed. ... Keywords: Acoustic communication, OFDM, MIMO

Jan Erik Hakegard; Knut Grythe

2009-05-01T23:59:59.000Z

363

State-of-the-art in protocol research for underwater acoustic sensor networks  

E-Print Network (OSTI)

In this paper, architectures for two-dimensional and three-dimensional underwater sensor networks are discussed. A detailed overview on the current solutions for medium access control, network, and transport layer protocols are given and open research issues are discussed. Categories and Subject Descriptors:

Ian F. Akyildiz; Dario Pompili; Tommaso Melodia

2006-01-01T23:59:59.000Z

364

HYDROLASING OF CONTAMINATED UNDERWATER BASIN SURFACES AT THE HANFORD K-AREA  

SciTech Connect

This paper discusses selecting and Implementing hydrolasing technology to reduce radioactive contamination in preparing to dispose of the K Basins; two highly contaminated concrete basins at the Hanford Site. A large collection of spent nuclear fuel stored for many years underwater at the K Basins has been removed to stable, dry, safe storage. Remediation activities have begun for the remaining highly contaminated water, sludge, and concrete basin structures. Hydrolasing will be used to decontaminate and prepare the basin structures for disposal. The U. S. Department of Energy's (DOE) Hanford Site is considered the world's largest environmental cleanup project. The site covers 1,517 Km{sup 2} (586 square miles) along the Columbia River in an arid region of the northwest United States (U.S.). Hanford is the largest of the US former nuclear defense production sites. From the World War II era of the mid-1940s until the late-1980s when production stopped, Hanford produced 60 percent of the plutonium for nuclear defense and, as a consequence, produced a significant amount of environmental pollution now being addressed. Spent nuclear fuel was among the major challenges for DOE's environmental cleanup mission at Hanford. The end of production left Hanford with about 105,000 irradiated, solid uranium metal fuel assemblies--representing approximately 2,100 metric tons (80 percent of DOE's spent nuclear fuel). The fuel was ultimately stored in the K Basins water-filled, concrete basins attached to Hanford's K East (KE) and K West (KW) reactors. K Basin's fuel accounted for 95 percent of the total radioactivity in Hanford's former reactor production areas. Located about 457 meters (500 yards) from the Columbia River, the K Basins are two indoor, rectangular structures of reinforced concrete; each filled with more than 3.8 million liters (one million gallons) of water that has become highly contaminated with long-lived radionuclides. At the KW Basin, fuel was packaged and sealed in canisters. At the KE Basin, fuel was stored in open canisters that were exposed to water in the basin. The irradiated spent nuclear fuel corroded during long-term, wet storage; resulting in thousands of fuel assemblies becoming severely corroded and/or damaged. Corrosion, especially in the KE Basin, contributed to the formation of a layer of radioactive sludge in the basins. Sludge removal is now progressing and will be followed by dewatering and dispositioning the concrete structures. The DOE Richland Operations Office (RL) has given Fluor Hanford Inc./Fluor Government Group (Fluor) the task of preparing Hanford's K Basins for decontamination and disposal. Prior to dewatering, hydrolasing will be used to decontaminate the basin surfaces to prepare them for disposal. By removing highly contaminated surface layers of concrete, hydrolasing will be used to meet the dose objectives for protecting workers and complying with regulations for transporting demolition debris. Fluor has innovated, tested, and planned the application of the hydrolasing technology to meet the challenge of decontaminating highly radioactive concrete surfaces underwater. Newly existing technology is being adapted to this unique challenge.

CHRONISTER, G.B.

2005-06-14T23:59:59.000Z

365

CX-002990: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

superstructure. The superstructure is located in Number 2 Transfer Pit, and is underwater. Work will be performed by a subcontractor that specializes in underwater repair...

366

Autonomous Underwater Vehicle (AUV) path planning and adaptive on-board routing for adaptive rapid environmental assessment  

E-Print Network (OSTI)

In shallow water, a large part of underwater acoustic prediction uncertainties are induced by sub-meso-to-small scale oceanographic variabilities. Conventional oceanographic measurements for capturing such ocean-acoustic ...

Wang, Ding, Ph. D. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

367

Autonomous Underwater Vehicle Measurements of Surface Wave Decay and Directional Spectra in the Marginal Sea Ice Zone  

Science Conference Proceedings (OSTI)

In March 2003 several autonomous underwater vehicle (AUV) missions were carried out under sea ice in the western Bellingshausen Sea. Data from the upward-looking acoustic Doppler current profiler (ADCP) on the “Autosub” AUV indicate a strongly ...

Daniel R. Hayes; Adrian Jenkins; Stephen McPhail

2007-01-01T23:59:59.000Z

368

AquaOptical: a lightweight device for high-rate long-range underwater point-to-point communication  

E-Print Network (OSTI)

This paper describes AquaOptical, an underwater optical communication system. Three optical modems have been developed: a long range system, a short range system, and a hybrid. We describe their hardware and software ...

Doniec, Marek Wojciech

369

Design of an autonomous underwater vehicle to evaluate the blazed array sonar and simultaneous localization and mapping algorithms  

E-Print Network (OSTI)

This thesis has investigated aspects of the design of a new highly maneuverable Autonomous Underwater Vehicle - the XAUV. The overall goal for the design of this vehicle is to create a small, highly maneuverable AUV that ...

Uhle, Matthew William

2007-01-01T23:59:59.000Z

370

Lossy compression and real-time geovisualization for ultra-low bandwidth telemetry from untethered underwater vehicles  

E-Print Network (OSTI)

Oceanographic applications of robotics are as varied as the undersea environment itself. As underwater robotics moves toward the study of dynamic processes with multiple vehicles, there is an increasing need to distill ...

Murphy, Christopher Alden

2008-01-01T23:59:59.000Z

371

Challenges: Building Scalable and Distributed Underwater Wireless Sensor Networks (UWSNs) for Aquatic Applications  

E-Print Network (OSTI)

Large-scale Underwater Wireless Sensor Network (UWSN) is a novel networking paradigm to explore the uninhabited and complex oceans. However, the characteristics of UWSNs, such as huge propagation delay, floating node mobility, and limited acoustic link capacity, are significantly different from ground-based wireless sensor networks and existing small scale Underwater Acoustic Networks (UANs). The novel networking paradigm poses inter-disciplinary challenges that will require new technological solutions. In particular, in this technical report we adopt a top-down approach to explore the research challenges in UWSN design. Along the layered protocol stack, we roughly go down from the top application layer to the bottom physical layer. At each layer, a set of new design intricacies are studied. The conclusion is that building scalable and distributed UWSNs is a challenge that must be answered by inter-disciplinary efforts of acoustic communications, signal processing and mobile acoustic network protocol design. I.

Jun-hong Cui; Jiejun Kong; Mario Gerla; Shengli Zhou

2005-01-01T23:59:59.000Z

372

Enforcing heritage law in Dutch waters. The enforcement of the provisions of the Monuments and Historic Buildings Act on illegal excavation of underwater cultural heritage.  

E-Print Network (OSTI)

??This study focuses on illegal excavation as a threat to underwater cultural heritage in the Netherlands. More specifically, it deals with enforcement of legal protection… (more)

Ziengs, Leon

2012-01-01T23:59:59.000Z

373

Employing social gaze and speaking activity for automatic determination of the Extraversion trait  

Science Conference Proceedings (OSTI)

In order to predict the Extraversion personality trait, we exploit medium-grained behaviors enacted in group meetings, namely, speaking time and social attention (social gaze). The latter will be further distinguished in to attention given to ... Keywords: personality prediction, speaking activity, support vector machines, visual social gaze

Bruno Lepri; Ramanathan Subramanian; Kyriaki Kalimeri; Jacopo Staiano; Fabio Pianesi; Nicu Sebe

2010-11-01T23:59:59.000Z

374

Travel determinants and multi-scale transferability of national activity patterns to local populations  

Science Conference Proceedings (OSTI)

The ability to transfer national travel patterns to a local population is of interest when attempting to model megaregions or areas that exceed metropolitan planning organization (MPO) boundaries. At the core of this research are questions about the connection between travel behavior and land use, urban form, and accessibility. As a part of this process, a group of land use variables have been identified to define activity and travel patterns for individuals and households. The 2001 National Household Travel Survey (NHTS) participants are divided into categories comprised of a set of latent cluster models representing persons, travel, and land use. These are compared to two sets of cluster models constructed for two local travel surveys. Comparison of means statistical tests are used to assess differences among sociodemographic groups residing in localities with similar land uses. The results show that the NHTS and the local surveys share mean population activity and travel characteristics. However, these similarities mask behavioral heterogeneity that are shown when distributions of activity and travel behavior are examined. Therefore, data from a national household travel survey cannot be used to model local population travel characteristics if the goal to model the actual distributions and not mean travel behavior characteristics.

Henson, Kriste M [Los Alamos National Laboratory; Gou; ias, Konstadinos G [UCSB

2010-11-30T23:59:59.000Z

375

QUO VADIS: QoS-aware Underwater Optimization Framework for Inter-vehicle Communication using Acoustic Directional Transducers  

E-Print Network (OSTI)

Abstract—Underwater acoustic communications consume a significant amount of energy due to the high transmission power (10?50 W) and long data packet transmission times (0.1?1 s). Mobile Autonomous Underwater Vehicles (AUVs) can conserve energy by waiting for the ‘best ’ network topology configuration, e.g., a favorable alignment, before starting to communicate. Due to the frequency-selective underwater acoustic ambient noise and high medium power absorption – which increases exponentially with distance – a shorter distance between AUVs translates into a lower transmission loss and a higher available bandwidth. By leveraging the predictability of AUV trajectories, a novel solution is proposed that optimizes communications by delaying packet transmissions in order to wait for a favorable network topology (thus trading end-to-end delay for energy and/or throughput). In addition, the solution proposed – which is implemented and compared with other solutions using an emulator that integrates underwater acoustic WHOI Micro-Modems – exploits the frequency-dependent radiation pattern of underwater acoustic transducers to reduce communication energy consumption by adjusting the transducer directivity on-the-fly. I.

Baozhi Chen; Dario Pompili

2011-01-01T23:59:59.000Z

376

Determination of contamination in rare earth materials by promptgamma activation analysis (PGAA)  

SciTech Connect

Prompt gamma activation analysis (PGAA) has been used to detect and quantify impurities in the analyses of rare earth (RE) oxides. The analytical results are discussed with respect to the importance of having a thorough identification and understanding of contaminant elements in these compounds regarding the function of the materials in their various applications. Also, the importance of using PGAA to analyze materials in support of other physico-chemical studies of the materials is discussed, including the study of extremely low concentrations of ions such as the rare earth ions themselves in bulk material matrices.

Perry, D.L.; English, G.A.; Firestone, R.B.; Molnar, G.L.; Revay,Zs.

2004-11-09T23:59:59.000Z

377

A CDMA-based Medium . . . UnderWater Acoustic Sensor Networks  

E-Print Network (OSTI)

UnderWater Acoustic Sensor Networks (UW-ASNs) ... performing collaborative monitoring tasks. In this article, UW-MAC, a distributed Medium Access Control (MAC) protocol designed for UW-ASNs, is introduced. The proposed MAC protocol is a transmitter-based Code Division Multiple Access (CDMA) scheme that incorporates a novel closed-loop distributed algorithm to jointly set the optimal transmit power and code length. CDMA is the most promising physical layer and multiple access technique for UW-ASNs because it is robust to frequencyselective fading, it compensates for the effect of multipath at the receiver, and it allows receivers to distinguish among signals simultaneously transmitted by multiple devices. UW-MAC aims at achieving three objectives, i.e., guarantee i) high network throughput, ii) low channel access delay, and iii) low energy consumption. It is demonstrated that UW-MAC simultaneously achieves these three objectives in deep water communications (where the ocean depth is more than 100 m), which are usually not severely affected by multipath. In shallow water communications, which may be heavily affected by multipath, it dynamically finds the optimal trade-off among these objectives according to the application requirements. UW-MAC is the first protocol that leverages CDMA properties to achieve multiple access to the scarce underwater bandwidth, while other protocols tailored for this environment have considered CDMA merely from a physical layer perspective. Experiments show that UW-MAC outperforms many existing MAC protocols tuned for the underwater environment under different architecture scenarios and simulation settings.

Dario Pompili; Tommaso Melodia; Ian F. Akyildiz

2009-01-01T23:59:59.000Z

378

Categorical Exclusion (CX) Determinations By Date | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

15, 2012 15, 2012 CX-008459: Categorical Exclusion Determination Autonomous Underwater Inspection Using Three Dimensional Laser CX(s) Applied: B3.6 Date: 06/15/2012 Location(s): Florida Offices(s): National Energy Technology Laboratory June 15, 2012 CX-008457: Categorical Exclusion Determination Ohio Advanced Transportation Partnership - Electrical Vehicle Supply Equipment Installation in Walgreens Parking Lot CX(s) Applied: B5.23 Date: 06/15/2012 Location(s): Ohio Offices(s): National Energy Technology Laboratory June 15, 2012 CX-008456: Categorical Exclusion Determination Autonomous Underwater Inspection Using Three Dimensional Laser CX(s) Applied: B3.6 Date: 06/15/2012 Location(s): Florida Offices(s): National Energy Technology Laboratory June 15, 2012 CX-008455: Categorical Exclusion Determination

379

Determination of laser-evaporated uranium dioxide by neutron activation analysis  

SciTech Connect

Safety analyses of nuclear reactors require information about the loss of fuel which may occur at high temperatures. In this study, the surface of a uranium dioxide target was heated rapidly by a laser. The uranium surface was vaporized into a vacuum. The uranium bearing species condensed on a graphite disk placed in the pathway of the expanding uranium vapor. Scanning electron microscopy and X-ray analysis showed very little droplet ejection directly from the laser target surface. Neutron activation analysis was used to measure the amount of uranium deposited. The surface temperature was measured by a fast-response automatic optical pyrometer. The maximum surface temperature ranged from 2400 to 3700/sup 0/K. The Hertz-Langmuir formula, in conjunction with the measured surface temperature transient, was used to calculate the theoretical amount of uranium deposited. There was good agreement between theory and experiment above the melting point of 3120/sup 0/K. Below the melting point much more uranium was collected than was expected theoretically. This was attributed to oxidation of the surface. 29 refs., 16 figs., 7 tabs.

Allred, R.

1987-05-01T23:59:59.000Z

380

A Sensor-based Long Baseline Position and Velocity Navigation Filter for Underwater Vehicles  

E-Print Network (OSTI)

This paper presents a novel Long Baseline (LBL) position and velocity navigation filter for underwater vehicles based directly on the sensor measurements. The solution departs from previous approaches as the range measurements are explicitly embedded in the filter design, therefore avoiding inversion algorithms. Moreover, the nonlinear system dynamics are considered to their full extent and no linearizations are carried out whatsoever. The filter error dynamics are globally asymptotically stable (GAS) and it is shown, under simulation environment, that the filter achieves similar performance to the Extended Kalman Filter (EKF) and outperforms linear position and velocity filters based on algebraic estimates of the position obtained from the range measurements.

Batista, Pedro; Oliveira, Paulo

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Determination of hydrogen in niobium by cold neutron prompt gamma ray activation analysis and neutron incoherent scattering  

DOE Green Energy (OSTI)

The presence of trace amounts of hydrogen in niobium is believed to have a detrimental effect on the mechanical and superconducting properties. Unfortunately, few techniques are capable of measuring hydrogen at these levels. We have developed two techniques for measuring hydrogen in materials. Cold neutron prompt gamma-ray activation analysis (PGAA) has proven useful for the determination of hydrogen and other elements in a wide variety of materials. Neutron incoherent scattering (NIS), a complementary tool to PGAA, has been used to measure trace hydrogen in titanium. Both techniques were used to study the effects of vacuum heating and chemical polishing on the hydrogen content of superconducting niobium.

R.L. Paul; H.H. Cheu-Maya; G.R. Myneni

2002-11-01T23:59:59.000Z

382

DUMAND-II (deep underwater muon and neutrino detector) progress report  

SciTech Connect

The DUMAND II detector will search for astronomical sources of high energy neutrinos. Successful deployment of the basic infrastructure, including the shore cable, the underwater junction box, and an environmental module was accomplished in December, 1993. One optical module string was also deployed and operated, logging data for about 10 hours. The underwater cable was connected to the shore station where we were able to successfully exercise system controls and log further environmental data. After this time, water leaking into the electronics control module for the deployed string disabled the string electrical system. The acquired data are consistent with the expected rate of downgoing muons, and our ability to reconstruct muons was demonstrated. The measured acoustical backgrounds are consistent with expectation, which should allow acoustical detection of nearby PeV particle cascades. The disabled string has been recovered and is undergoing repairs ashore. We have identified the source of the water leak and implemented additional testing and QC procedures to ensure no repetition in our next deployment. We will be ready to deploy three strings and begin continuous data taking in late 1994 or early 1995. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

Young, K.K. [Department of Physics, University of Washington, Seattle, Washington 98195 (United States); The DUMAND Collaboration

1995-07-10T23:59:59.000Z

383

DUMAND-II (Deep Underwater Muon and Neutrino Detector) PROGRESS Report  

E-Print Network (OSTI)

The DUMAND-II detector will search for astronomical sources of high energy neutrinos. Successful deployment of the basic infrastructure, including the shore cable, the underwater junction box, and an environmental module was accomplished in December, 1993. One optical module string was also deployed and operated, logging data for about 10 hours. The underwater cable was connected to the shore station where we were able to successfully exercise system controls and log further environmental data. After this time, water leaking into the electronics control module for the deployed string disabled the string electrical system. The acquired data are consistent with the expected rate of downgoing muons, and our ability to reconstruct muons was demonstrated. The measured acoustical backgrounds are consistent with expectation, which should allow acoustical detection of nearby PeV particle cascades. The disabled string has been recovered and is undergoing repairs ashore. We have identified the source of the water leak and implemented additional testing and QC procedures to ensure no repetition in our next deployment. We will be ready to deploy three strings and begin continuous data taking in 1995.

Kenneth K. Young

1994-12-16T23:59:59.000Z

384

Software acoustic modems for short range mote-based underwater sensor networks  

E-Print Network (OSTI)

Abstract — Most recent work in underwater network development has relied on using expensive commercial acoustic modems or on building custom transceivers for each application to establish acoustic communication links among the sensors. Using commercial modems or designing custom hardware may require prohibitive monetary or time investment for many applications. Our work proposes the design of software acoustic modems that can utilize built-in microphones and speakers on the relatively cheap Tmote Invent platforms. The software modem and built-in hardware can be used for establishing acoustic communication in a short range shallow water network for environmental monitoring. In this paper, we introduce the application and architecture for our proposed network, as well as the initial design of our acoustic communication system. Our experiments with generic acoustic hardware to profile this underwater communication channel reveal that this channel favors frequencies below 3Khz, a result which guides the design choices for our FSK software modem. We perform experiments with our software modem/generic hardware system to explore the system’s data transfer capability. The data communications experiments confirm the system’s capability of transferring information in the order of tens of bits per second for a communications range of up to 10 meters. I.

Raja Jurdak; Cristina Videira Lopes; Pierre Baldi

2006-01-01T23:59:59.000Z

385

Addressing the efficiency of the energy transfer to the water flow by underwater electrical wire explosion  

SciTech Connect

Experimental and hydrodynamic simulation results of submicrosecond time scale underwater electrical explosions of planar Cu and Al wire arrays are presented. A pulsed low-inductance generator having a current amplitude of up to 380 kA was used. The maximum current rise rate and maximum power achieved during wire array explosions were dI/dt<=830 A/ns and approx10 GW, respectively. Interaction of the water flow generated during wire array explosion with the target was used to estimate the efficiency of the transfer of the energy initially stored in the generator energy to the water flow. It was shown that efficiency is in the range of 18%-24%. In addition, it was revealed that electrical explosion of the Al wire array allows almost double the energy to be transferred to the water flow due to efficient combustion of the Al wires. The latter allows one to expect a significant increase in the pressure at the front of converging strong shock waves in the case of cylindrical Al wire array underwater explosion.

Efimov, S.; Gurovich, V. Tz.; Bazalitski, G.; Fedotov, A.; Krasik, Ya. E. [Physics Department, Technion, Haifa 32000 (Israel)

2009-10-01T23:59:59.000Z

386

Divergence-Free Spatial Velocity Flow Field Interpolator for Improving Measurements from ADCP-Equipped Small Unmanned Underwater Vehicles  

Science Conference Proceedings (OSTI)

Applying a two-dimensional (2D) divergence-free (DF) interpolation to a one-person deployable unmanned underwater vehicle’s (UUV) noisy moving-vessel acoustic Doppler current profiler (MV-ADCP) measurements improves the results and increases the ...

Jamie MacMahan; Ross Vennell; Rick Beatson; Jenna Brown; Ad Reniers

2012-03-01T23:59:59.000Z

387

In situ quality assessment of a novel underwater pCO2 sensor based on membrane equilibration and NDIR spectrometry  

Science Conference Proceedings (OSTI)

We present a detailed quality assessment of a novel underwater sensor for the measurement of CO2 partial pressure (pCO2) based on surface water field deployments carried out between 2008 and 2011. The commercially available sensor, which is based ...

Peer Fietzek; Björn Fiedler; Tobias Steinhoff; Arne Körtzinger

388

SOLAR-POWERED AUTONOMOUS UNDERWATER VEHICLE DEVELOPMENT James Jalbert, John Baker, John Duchesney, Paul Pietryka, William Dalton  

E-Print Network (OSTI)

SOLAR-POWERED AUTONOMOUS UNDERWATER VEHICLE DEVELOPMENT James Jalbert, John Baker, John Duchesney in such applications. The concept of a vehicle that would allow on-station recharging of batteries, using solar cells-term or ongoing deployment is required. The Solar Powered AUV (SAUV) is designed for continuous deployment (weeks

389

Underwater robotic work systems for Russian arctic offshore oil/gas industry: Final report. Export trade information  

SciTech Connect

The study was performed in association with Rosshelf, a shelf developing company located in Moscow. This volume involves developing an underwater robotic work system for oil exploration in Russia`s Arctic waters, Sea of Okhotsk and the Caspian Sea. The contents include: (1) Executive Summary; (2) Study Background; (3) Study Outline and Results; (4) Conclusions; (5) Separately Published Elements; (6) List of Subcontractors.

NONE

1997-12-15T23:59:59.000Z

390

Gas chromatographic determination of microamounts of glycols and their esters in aqueous medium using adsorption on activated charcoal  

SciTech Connect

Rapid growth of production of glycols and their derivatives, especially methyl and ethyl esters, and wide use of these substances in various branches of the national economy (1) inevitably necessitate analytical monitoring of their content in waste waters and various water bodies. The authors studied the scope of gas-chromatographic determination of microamounts of glycols and their esters in aqueous media at the sanitary standards level (10/sup -5/%) using activated charcoal for their adsorption concentration from aqueous solutions, desorption from the charcoal by ethanol, and evaporationconcentration of the alcoholic solutions. The quantitative concentration characteristics were studied with reference to ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, triethyleneglycol, tripropylene glycol, tetraethylene glycol, ethylcellosolve, ethyl carbitol, and monoethyl ester of triethylene glycol.

Begunov, G.A.; Titovskaya, V.N.; Galenko, A.V.

1987-11-10T23:59:59.000Z

391

Crystallization to polycrystalline silicon thin film and simultaneous inactivation of electrical defects by underwater laser annealing  

SciTech Connect

We propose a low-temperature laser annealing method of a underwater laser annealing (WLA) for polycrystalline silicon (poly-Si) films. We performed crystallization to poly-Si films by laser irradiation in flowing deionized-water where KrF excimer laser was used for annealing. We demonstrated that the maximum value of maximum grain size of WLA samples was 1.5 {mu}m, and that of the average grain size was 2.8 times larger than that of conventional laser annealing in air (LA) samples. Moreover, WLA forms poly-Si films which show lower conductivity and larger carrier life time attributed to fewer electrical defects as compared to LA poly-Si films.

Machida, Emi [Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192 (Japan); Research Fellowships of the Japan Society for the Promotion of Science, Japan Society for the Promotion of Science, 1-8 Chiyoda, Tokyo 102-8472 (Japan); Horita, Masahiro; Ishikawa, Yasuaki; Uraoka, Yukiharu [Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192 (Japan); Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Honcho, Kawaguchi, Saitama 332-0012 (Japan); Ikenoue, Hiroshi [Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka Nishi-ku, Fukuoka 819-0395 (Japan)

2012-12-17T23:59:59.000Z

392

The challenges of building scalable mobile underwater wireless sensor networks for aquatic applications  

E-Print Network (OSTI)

The large-scale mobile Underwater Wireless Sensor Network (UWSN) is a novel networking paradigm to explore aqueous environments. However, the characteristics of mobile UWSNs, such as low communication bandwidth, large propagation delay, floating node mobility, and high error probability, are significantly different from ground-based wireless sensor networks. The novel networking paradigm poses interdisciplinary challenges that will require new technological solutions. In particular, in this article we adopt a top-down approach to explore the research challenges in mobile UWSN design. Along the layered protocol stack, we proceed roughly from the top application layer to the bottom physical layer. At each layer, a set of new design intricacies are studied. The conclusion is that building scalable mobile UWSNs is a challenge that must be answered by interdisciplinary efforts of acoustic communications, signal processing, and mobile acoustic network protocol design. T

Jun-hong Cui; Jiejun Kong; Mario Gerla

2006-01-01T23:59:59.000Z

393

High-Resolution Topography-Following Chemical Mapping of Ocean Hypoxia by Use of an Autonomous Underwater Vehicle: The Santa Monica Basin Example  

Science Conference Proceedings (OSTI)

We report on the execution of a combined chemical sensing/high-resolution terrain-following autonomous underwater vehicle (AUV) survey to explore the fine structure and functional boundaries of the Santa Monica Basin sub-oxic zone and its ...

Andreas F. Hofmann; Peter M. Walz; Hans Thomas; Edward T. Peltzer; Peter G. Brewer

394

A peak-capture algorithm used on an autonomous underwater vehicle in the 2010 Gulf of Mexico oil spill response scientific survey  

Science Conference Proceedings (OSTI)

During the Gulf of Mexico Oil Spill Response Scientific Survey on the National Oceanic and Atmospheric Administration Ship Gordon Gunter Cruise GU-10-02 (27 May–4 June 2010), a Monterey Bay Aquarium Research Institute autonomous underwater vehicle ...

Yanwu Zhang; Robert S. McEwen; John P. Ryan; James G. Bellingham; Hans Thomas; Charles H. Thompson; Erich Rienecker

2011-07-01T23:59:59.000Z

395

Diagnostics of underwater electrical wire explosion through a time- and space-resolved hard x-ray source  

SciTech Connect

A time- and space-resolved hard x-ray source was developed as a diagnostic tool for imaging underwater exploding wires. A {approx}4 ns width pulse of hard x-rays with energies of up to 100 keV was obtained from the discharge in a vacuum diode consisting of point-shaped tungsten electrodes. To improve contrast and image quality, an external pulsed magnetic field produced by Helmholtz coils was used. High resolution x-ray images of an underwater exploding wire were obtained using a sensitive x-ray CCD detector, and were compared to optical fast framing images. Future developments and application of this diagnostic technique are discussed.

Sheftman, D.; Shafer, D.; Efimov, S.; Gruzinsky, K.; Gleizer, S.; Krasik, Ya. E. [Physics Department, Technion, Haifa 32000 (Israel)

2012-10-15T23:59:59.000Z

396

Building Underwater Ad-Hoc Networks and Sensor Networks for Large Scale Real-Time Aquatic Applications  

E-Print Network (OSTI)

Large-scale Underwater Ad-hoc Networks (UANET) and Underwater Sensor Networks (UWSN) are novel networking paradigms to explore the uninhabited oceans. However, the characteristics of these new networks, such as huge propagation delay, floating node mobility, and limited acoustic link capacity, are significantly different from ground-based mobile ad-hoc networks (MANET) and wireless sensor networks (WSN). In this paper we adopt a top-down approach to explore the new research subject. We at first show a new practical application scenario that cannot be addressed by existing technology and hence demands the advent of the UANET and UWSN. Then along the layered protocol stack, we go down from the top application layer to the bottom physical layer. At each layer we show a set of new design challenges. We conclude that UANET and UWSN are challenges that must be answered by inter-disciplinary efforts of acoustic communication, signal processing and mobile acoustic network protocol design.

Jiejun Kong; Jun-hong Cui; Dapeng Wu; Mario Gerla

2005-01-01T23:59:59.000Z

397

Evaluation of electrical conductivity and equations of state of non-ideal plasma through microsecond timescale underwater electrical wire explosion  

Science Conference Proceedings (OSTI)

Experimental and simulation results of underwater electrical Cu, Al, and W wire explosions in the microsecond timescale are presented. It was shown that the electrical conductivity results for Cu and Al agree well with modified Lee-More and quantum molecular dynamic models for temperatures above 10 kK. The equation of state (EOS) values based on SESAME tables for Cu and Al were slightly modified for intermediate temperatures in order to obtain fitting between experimental and simulated exploding wire radial expansion. Also, it was shown that the electrical conductivity results and the EOS evaluation differ significantly from the results obtained in nanosecond timescale experiments. Finally, it was found that underwater electrical W wire explosion is characterized by the appearance of non-uniformities along the z-axis of the wire. This phenomena adds uncertainty to the possibility of applying this type of experiments for evaluation of the electrical conductivity and EOS of W.

Sheftman, D.; Krasik, Ya. E. [Physics Department, Technion, Haifa 32000 (Israel)

2011-09-15T23:59:59.000Z

398

Page not found | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ical-exclusion-determination Download CX-005561: Categorical Exclusion Determination Underwater Active Acoustic Monitoring Support for Marine Hydrokinetic Energy Projects CX(s)...

399

Underwater Threat Source Localization: Processing Sensor Network TDOAs with a Terascale Optical Core Device  

Science Conference Proceedings (OSTI)

Revolutionary computing technologies are defined in terms of technological breakthroughs, which leapfrog over near-term projected advances in conventional hardware and software to produce paradigm shifts in computational science. For underwater threat source localization using information provided by a dynamical sensor network, one of the most promising computational advances builds upon the emergence of digital optical-core devices. In this article, we present initial results of sensor network calculations that focus on the concept of signal wavefront time-difference-of-arrival (TDOA). The corresponding algorithms are implemented on the EnLight processing platform recently introduced by Lenslet Laboratories. This tera-scale digital optical core processor is optimized for array operations, which it performs in a fixed-point-arithmetic architecture. Our results (i) illustrate the ability to reach the required accuracy in the TDOA computation, and (ii) demonstrate that a considerable speed-up can be achieved when using the EnLight 64a prototype processor as compared to a dual Intel XeonTM processor.

Barhen, Jacob [ORNL; Imam, Neena [ORNL

2007-01-01T23:59:59.000Z

400

Underwater pressure amplification of laser-induced plasma shock waves for particle removal applications  

Science Conference Proceedings (OSTI)

Underwater amplification of laser-induced plasma (LIP)-generated transient pressure waves using shock tubes is introduced and demonstrated. Previously, it has been shown that LIP for noncontact particle removal is possible on the sub-100-nm level. This is now enhanced through shock tube utilization in a medium such as water by substantially increasing shock wave pressure for the same pulse energy. A shock tube constrains the volume and changes the propagation direction of the expanding plasma core by focusing a pulsed-laser beam inside a tube with a blind end, thus increasing the wave front pressure generated. Current amplification approach can reduce radiation exposure of the substrate from the shock wave because of the increased distance from the LIP core to the substrate provided by the increased pressure per unit pulse energy. For the same pulsed laser, with the aid of a shock tube, substantial levels of pressure amplitude amplification (8.95) and maximum pressure (6.48 MPa) are observed and reported.

Dunbar, Thomas J.; Cetinkaya, Cetin [Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, New York 13699-5725 (United States) and Center for Advanced Materials Processing, Clarkson University, Potsdam, New York 13699-5725 (United States)

2007-07-30T23:59:59.000Z

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Vibration and Nonlinear Resonance in the Break-up of an Underwater Bubble  

E-Print Network (OSTI)

We use high-speed X-ray phase-contrast imaging, weakly nonlinear analysis and boundary integral simulations to characterize the final stage of underwater bubble break-up. The X-ray imaging study shows that an initial azimuthal perturbation to the shape of the bubble neck gives rise to oscillations that increasingly distort the cross-section shape. These oscillations terminate in a pinch-off where the bubble surface develops concave regions that contact similar to what occurs when two liquid drops coalesce. We also present a weakly nonlinear analysis that shows that this coalescence-like mode of pinch-off occurs when the initial shape oscillation interferes constructively with the higher harmonics it generates and thus reinforce each other's effects in bringing about bubble break-up. Finally we present numerical results that confirm the weakly nonlinear analysis scenario as well as provide insight into observed shape reversals. They demonstrate that when the oscillations interfere destructively, a qualitativel...

Lai, Lipeng; Fezzaa, Kamel; Zhang, Wendy W; Nagel, Sidney R

2013-01-01T23:59:59.000Z

402

How Well Does Water Activity Determine Homogeneous Ice Nucleation Temperature in Aqueous Sulfuric Acid and Ammonium Sulfate Droplets?  

Science Conference Proceedings (OSTI)

Frozen fraction measurements made using a droplet free-fall freezing tube apparatus are presented and used, along with other recent laboratory measurements, to evaluate how well both the water activity idea and the translated melting-point curve ...

Brian D. Swanson

2009-03-01T23:59:59.000Z

403

Summary engineering description of underwater fuel storage facility for foreign research reactor spent nuclear fuel  

SciTech Connect

This document is a summary description for an Underwater Fuel Storage Facility (UFSF) for foreign research reactor (FRR) spent nuclear fuel (SNF). A FRR SNF environmental Impact Statement (EIS) is being prepared and will include both wet and dry storage facilities as storage alternatives. For the UFSF presented in this document, a specific site is not chosen. This facility can be sited at any one of the five locations under consideration in the EIS. These locations are the Idaho National Engineering Laboratory, Savannah River Site, Hanford, Oak Ridge National Laboratory, and Nevada Test Site. Generic facility environmental impacts and emissions are provided in this report. A baseline fuel element is defined in Section 2.2, and the results of a fission product analysis are presented. Requirements for a storage facility have been researched and are summarized in Section 3. Section 4 describes three facility options: (1) the Centralized-UFSF, which would store the entire fuel element quantity in a single facility at a single location, (2) the Regionalized Large-UFSF, which would store 75% of the fuel element quantity in some region of the country, and (3) the Regionalized Small-UFSF, which would store 25% of the fuel element quantity, with the possibility of a number of these facilities in various regions throughout the country. The operational philosophy is presented in Section 5, and Section 6 contains a description of the equipment. Section 7 defines the utilities required for the facility. Cost estimates are discussed in Section 8, and detailed cost estimates are included. Impacts to worker safety, public safety, and the environment are discussed in Section 9. Accidental releases are presented in Section 10. Standard Environmental Impact Forms are included in Section 11.

Dahlke, H.J.; Johnson, D.A.; Rawlins, J.K.; Searle, D.K.; Wachs, G.W.

1994-10-01T23:59:59.000Z

404

Determination of ring correction factors for leaded gloves used in grab sampling activities at Hanford tank farms  

Science Conference Proceedings (OSTI)

This study evaluates the effectiveness of lead lined gloves in reducing extremity dose from two sources specific to tank waste sampling activities: (1) sludge inside glass sample jars and (2) sludge as thin layer contamination on the exterior surface of sample jars. The response of past and present Hanford Extremity Dosimeters (ring) designs under these conditions is also evaluated.

RATHBONE, B.A.

1999-06-24T23:59:59.000Z

405

DOI: 10.1109/3DUI.2012.6184201 A new Device for Virtual or Augmented Underwater Diving  

E-Print Network (OSTI)

The objective of this work is to recreate the sensorial conditions of scuba diving in the most frequented public aquatic spaces – Beaches and Swimming pools. The version of the device included is autonomous, mobile and easily transportable by one person in a backpack. It can also be easily installed, equipped with GPS and wireless systems, and has positive buoyancy. Also, the possibility to integrate a component that may give a self-propelling capacity may be considered. In fact, by reducing the length of the anchoring cable, it will be possible to modify the depth of immersion. The device will be used at water surface as well as underwater using a tuba (- 40 cm). Moreover, the device is equipped with one (can be upgraded for more) video camera pointing downwards. In fact, Augmented Reality contents combining actual underwater images with 3D animated images will be one of the preferred ways to use the device. Priority will be given to technical options leading to a “green ” device, with renewable power consumption and built with recyclable materials.

Christophe Domingues; Samir Otmane; Alain Dinis

2012-01-01T23:59:59.000Z

406

Vocalization characteristics of North Atlantic right whale surface active groups in the calving habitat, southeastern United States  

Science Conference Proceedings (OSTI)

Passive acoustic surveys were conducted to assess the vocal behavior of North Atlantic right whales (Eubalaena glacialis) in the designated critical calving habitat along the shallow coastal waters of southeastern United States. Underwater vocalizations were recorded using autonomous buoys deployed in close proximity to surface active groups (SAGs). Nine main vocalization types were identified with manual inspection of spectrograms

Vasilis Trygonis; Edmund Gerstein; Stephen McCulloch

2013-01-01T23:59:59.000Z

407

activities  

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Detecting Things We Cannot See: Learning the Concepts of Control and Detecting Things We Cannot See: Learning the Concepts of Control and Variable in an Experiment Submitted by Anita Brook-Dupree, 1996 TRAC teacher at Fermilab, Teacher, Alternative Middle Years School, Philadelphia, PA. Particle physicists at Fermilab in Batavia, Illinois are faced with the problem of detecting the presence of sub-atomic particles they cannot see. During my summer as a TRAC teacher at Fermilab, I tried to think of ways to teach middle school students about things we cannot see. I want to thank my nine-year-old daughter Gia for the idea for the following activity. I was lamenting that I could not come up with ideas of how to relate the work of Fermilab scientists to anything that my students would understand. Then I was reminded by my daughter, that when I brought her to school on the

408

Underwater radiated noise measurements of a noise?reduced research vessel: Comparison between a U.S. Navy noise range and a simple hydrophone mooring.  

Science Conference Proceedings (OSTI)

[A feasibility study was undertaken to characterize underwater radiated noise for a new class of noise?reduced fisheries research vessels using a field?deployable hydrophone system. Recent studies have demonstrated that vessel?radiated noise can impact the behavior of fish

Alex De Robertis; Christopher D. Wilson; Peter H. Dahl

2011-01-01T23:59:59.000Z

409

Underwater radiated noise measurements of a noise-reduced research vessel: comparison between a US Navy noise range and a simple hydrophone mooring.  

Science Conference Proceedings (OSTI)

A feasibility study was undertaken to characterize underwater radiated noise for a new class of noise-reduced fisheries research vessels using a field-deployable hydrophone system. Recent studies have demonstrated that vessel-radiated noise can impact the behavior of fish

Alex De Robertis; Christopher Wilson

2014-01-01T23:59:59.000Z

410

CX-006119: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

prepost hurricane inspection of an offshore facility using an autonomous unmanned underwater vehicle (AUV). DOCUMENT(S) AVAILABLE FOR DOWNLOAD CX-006119.pdf More Documents &...

411

Compliance Monitoring of Underwater Blasting for Rock Removal at Warrior Point, Columbia River Channel Improvement Project, 2009/2010  

Science Conference Proceedings (OSTI)

The U.S. Army Corps of Engineers, Portland District (USACE) conducted the 20-year Columbia River Channel Improvement Project (CRCIP) to deepen the navigation channel between Portland, Oregon, and the Pacific Ocean to allow transit of fully loaded Panamax ships (100 ft wide, 600 to 700 ft long, and draft 45 to 50 ft). In the vicinity of Warrior Point, between river miles (RM) 87 and 88 near St. Helens, Oregon, the USACE conducted underwater blasting and dredging to remove 300,000 yd3 of a basalt rock formation to reach a depth of 44 ft in the Columbia River navigation channel. The purpose of this report is to document methods and results of the compliance monitoring study for the blasting project at Warrior Point in the Columbia River.

Carlson, Thomas J.; Johnson, Gary E.; Woodley, Christa M.; Skalski, J. R.; Seaburg, Adam

2011-05-10T23:59:59.000Z

412

Investigation of electrical conductivity and equations of state of non-ideal plasma through underwater electrical wire explosion  

SciTech Connect

The results of experiments and magnetohydrodynamic simulations of nanosecond time scale underwater electrical explosions of Al, Cu, and W wires are presented. Experiments were performed using a nanosecond pulsed generator with a {approx}30 kA amplitude and {approx}60 ns rise time current pulse. The electrical conductivity of the tested materials in the density and temperature ranges of 0.1-20 g/cm{sup 3} and 0.03-8 eV, respectively, is presented. It is shown that for the physical conditions obtained in these experiments, the equation of state data used in the SESAME tables must be modified in order to reproduce the experimental results. Also, it was shown that the electrical conductivity of the metals does not consistently fit over the entire range of experimental conditions with either of the transport models presented.

Sheftman, D.; Krasik, Ya. E. [Physics Department, Technion, Haifa 32000 (Israel)

2010-11-15T23:59:59.000Z

413

Effect of muon-nuclear inelastic scattering on high-energy atmospheric muon spectrum at large depth underwater  

E-Print Network (OSTI)

The energy spectra of hadron cascade showers produced by the cosmic ray muons travelling through water as well as the muon energy spectra underwater at the depth up to 4 km are calculated with two models of muon inelastic scattering on nuclei, the recent hybrid model (two-component, 2C) and the well-known generalized ector-meson-dominance model for the comparison. The 2C model involves photonuclear interactions at low and moderate virtualities as well as the hard scattering including the weak neutral current processes. For the muon scattering off nuclei substantial uclear effects, shadowing, nuclear binding and Fermi motion of nucleons are taken into account. It is shown that deep nderwater muon energy spectrum calculated with the 2C model are noticeably distorted at energies above 100 TeV as compared to that obtained with the GVMD model.

S. I. Sinegovsky; A. Misaki; K. S. Lokhtin; N. Takahashi

2007-12-24T23:59:59.000Z

414

Sensitivity of ray dynamics in an underwater sound channel to vertical scale of longitudinal sound-speed variations  

E-Print Network (OSTI)

We investigate sound ray propagation in a range-dependent underwater acoustic waveguide. Our attention is focused on sensitivity of ray dynamics to the vertical structure of a sound-speed perturbation induced by ocean internal waves. Two models of longitudinal sound-speed variations are considered: a periodic inhomogeneity and a stochastic one. It is found that vertical oscillations of a sound-speed perturbation can affect rays in a resonant manner. Such resonances give rise to chaos in certain regions of phase space. It is shown that stability of steep rays, being observed in experiments, is connected with suppression of resonances in the case of small-scale vertical sound-speed oscillations.

D. V. Makarov; M. Yu. Uleysky; M. Yu. Martynov

2005-08-31T23:59:59.000Z

415

Effect of muon-nuclear inelastic scattering on high-energy atmospheric muon spectrum at large depth underwater  

E-Print Network (OSTI)

The energy spectra of hadron cascade showers produced by the cosmic ray muons travelling through water as well as the muon energy spectra underwater at the depth up to 4 km are calculated with two models of muon inelastic scattering on nuclei, the recent hybrid model (two-component, 2C) and the well-known generalized ector-meson-dominance model for the comparison. The 2C model involves photonuclear interactions at low and moderate virtualities as well as the hard scattering including the weak neutral current processes. For the muon scattering off nuclei substantial uclear effects, shadowing, nuclear binding and Fermi motion of nucleons are taken into account. It is shown that deep nderwater muon energy spectrum calculated with the 2C model are noticeably distorted at energies above 100 TeV as compared to that obtained with the GVMD model.

Sinegovsky, S I; Lokhtin, K S; Takahashi, N

2007-01-01T23:59:59.000Z

416

Enumeration of Salmonids in the Okanogan Basin Using Underwater Video, Performance Period: October 2005 (Project Inception) - 31 December 2006.  

DOE Green Energy (OSTI)

The Confederated Tribes of the Colville Reservation (Colville Tribes) identified the need for collecting baseline census data on the timing and abundance of adult salmonids in the Okanogan River Basin in order to determine basin and tributary-specific spawner distributions, evaluate the status and trends of natural salmonid production in the basin, document local fish populations, and augment existing fishery data. This report documents the design, installation, operation and evaluation of mainstem and tributary video systems in the Okanogan River Basin. The species-specific data collected by these fish enumeration systems are presented along with an evaluation of the operation of a facility that provides a count of fish using an automated method. Information collected by the Colville Tribes Fish & Wildlife Department, specifically the Okanogan Basin Monitoring and Evaluation Program (OBMEP), is intended to provide a relative abundance indicator for anadromous fish runs migrating past Zosel Dam and is not intended as an absolute census count. Okanogan Basin Monitoring and Evaluation Program collected fish passage data between October 2005 and December 2006. Video counting stations were deployed and data were collected at two locations in the basin: on the mainstem Okanogan River at Zosel Dam near Oroville, Washington, and on Bonaparte Creek, a tributary to the Okanogan River, in the town of Tonasket, Washington. Counts at Zosel Dam between 10 October 2005 and 28 February 2006 are considered partial, pilot year data as they were obtained from the operation of a single video array on the west bank fishway, and covered only a portion of the steelhead migration. A complete description of the apparatus and methodology can be found in 'Fish Enumeration Using Underwater Video Imagery - Operational Protocol' (Nass 2007). At Zosel Dam, totals of 57 and 481 adult Chinook salmon were observed with the video monitoring system in 2005 and 2006, respectively. Run timing for Chinook in 2006 indicated that peak passage occurred in early October and daily peak passage was noted on 5 October when 52 fish passed the dam. Hourly passage estimates of Chinook salmon counts for 2005 and 2006 at Zosel Dam revealed a slight diel pattern as Chinook passage events tended to remain low from 1900 hours to 0600 hours relative to other hours of the day. Chinook salmon showed a slight preference for passing the dam through the video chutes on the east bank (52%) relative to the west bank (48%). A total of 48 adult sockeye salmon in 2005 and 19,245 in 2006 were counted passing through the video chutes at Zosel Dam. The 2006 run timing pattern was characterized by a large peak in passage from 3 August through 10 August when 17,698 fish (92% of total run observed for the year) were observed passing through the video chutes. The daily peak of 5,853 fish occurred on 4 August. Hourly passage estimates of sockeye salmon counts for 2005 and 2006 at the dam showed a strong diel pattern with increased passage during nighttime hours relative to daytime hours. Sockeye showed a strong preference for passing Zosel Dam on the east bank (72%) relative to the west bank (28%). A total of 298 adult upstream-migrating steelhead were counted at Zosel Dam in 2005 and 2006, representing the 2006 cohort based on passage data from 5 October 2005 through 15 July 2006. Eighty-seven percent (87%) of the total steelhead observed passed the dam between 23 March and 25 April with a peak passage occurring on 6 April when 31 fish were observed. Steelhead passage at Zosel Dam exhibited no diel pattern. In contrast to both Chinook and sockeye salmon, steelhead were shown to have a preference for passing the dam on the west bank (71%) relative to the east bank (29%). Both Chinook and sockeye passage at Zosel Dam were influenced by Okanogan River water temperature. When water temperatures peaked in late July (daily mean exceeded 24 C and daily maximum exceeded 26.5 C), Chinook and sockeye counts went to zero. A subsequent decrease in water temperature resulted in sharp increases in both C

Johnson, Peter N.; Rayton, Michael D.; Nass, Bryan L.; Arterburn, John E.

2007-06-01T23:59:59.000Z

417

Enumeration of Salmonids in the Okanogan Basin Using Underwater Video, Performance Period: October 2005 (Project Inception) - 31 December 2006.  

SciTech Connect

The Confederated Tribes of the Colville Reservation (Colville Tribes) identified the need for collecting baseline census data on the timing and abundance of adult salmonids in the Okanogan River Basin in order to determine basin and tributary-specific spawner distributions, evaluate the status and trends of natural salmonid production in the basin, document local fish populations, and augment existing fishery data. This report documents the design, installation, operation and evaluation of mainstem and tributary video systems in the Okanogan River Basin. The species-specific data collected by these fish enumeration systems are presented along with an evaluation of the operation of a facility that provides a count of fish using an automated method. Information collected by the Colville Tribes Fish & Wildlife Department, specifically the Okanogan Basin Monitoring and Evaluation Program (OBMEP), is intended to provide a relative abundance indicator for anadromous fish runs migrating past Zosel Dam and is not intended as an absolute census count. Okanogan Basin Monitoring and Evaluation Program collected fish passage data between October 2005 and December 2006. Video counting stations were deployed and data were collected at two locations in the basin: on the mainstem Okanogan River at Zosel Dam near Oroville, Washington, and on Bonaparte Creek, a tributary to the Okanogan River, in the town of Tonasket, Washington. Counts at Zosel Dam between 10 October 2005 and 28 February 2006 are considered partial, pilot year data as they were obtained from the operation of a single video array on the west bank fishway, and covered only a portion of the steelhead migration. A complete description of the apparatus and methodology can be found in 'Fish Enumeration Using Underwater Video Imagery - Operational Protocol' (Nass 2007). At Zosel Dam, totals of 57 and 481 adult Chinook salmon were observed with the video monitoring system in 2005 and 2006, respectively. Run timing for Chinook in 2006 indicated that peak passage occurred in early October and daily peak passage was noted on 5 October when 52 fish passed the dam. Hourly passage estimates of Chinook salmon counts for 2005 and 2006 at Zosel Dam revealed a slight diel pattern as Chinook passage events tended to remain low from 1900 hours to 0600 hours relative to other hours of the day. Chinook salmon showed a slight preference for passing the dam through the video chutes on the east bank (52%) relative to the west bank (48%). A total of 48 adult sockeye salmon in 2005 and 19,245 in 2006 were counted passing through the video chutes at Zosel Dam. The 2006 run timing pattern was characterized by a large peak in passage from 3 August through 10 August when 17,698 fish (92% of total run observed for the year) were observed passing through the video chutes. The daily peak of 5,853 fish occurred on 4 August. Hourly passage estimates of sockeye salmon counts for 2005 and 2006 at the dam showed a strong diel pattern with increased passage during nighttime hours relative to daytime hours. Sockeye showed a strong preference for passing Zosel Dam on the east bank (72%) relative to the west bank (28%). A total of 298 adult upstream-migrating steelhead were counted at Zosel Dam in 2005 and 2006, representing the 2006 cohort based on passage data from 5 October 2005 through 15 July 2006. Eighty-seven percent (87%) of the total steelhead observed passed the dam between 23 March and 25 April with a peak passage occurring on 6 April when 31 fish were observed. Steelhead passage at Zosel Dam exhibited no diel pattern. In contrast to both Chinook and sockeye salmon, steelhead were shown to have a preference for passing the dam on the west bank (71%) relative to the east bank (29%). Both Chinook and sockeye passage at Zosel Dam were influenced by Okanogan River water temperature. When water temperatures peaked in late July (daily mean exceeded 24 C and daily maximum exceeded 26.5 C), Chinook and sockeye counts went to zero. A subsequent decrease in water temperature resulted in sharp increases

Johnson, Peter N.; Rayton, Michael D.; Nass, Bryan L.; Arterburn, John E.

2007-06-01T23:59:59.000Z

418

Determination of the adsorptive capacity and adsorption isotherm of vapor-phase mercury chloride on powdered activated carbon using thermogravimetric analysis  

Science Conference Proceedings (OSTI)

This study investigated the use of thermogravimetric analysis (TGA) to determine the adsorptive capacity and adsorption isotherm of vapor-phase mercury chloride on powdered activated carbon (PAC). The technique is commonly applied to remove mercury-containing air pollutants from gas streams emitted from municipal solid waste incinerators. An alternative form of powdered activated carbon derived from a pyrolyzed tire char was prepared for use herein. The capacity of waste tire-derived PAC to adsorb vapor-phase HgCl{sub 2} was successfully measured using a self-designed TGA adsorption system. Experimental results showed that the maximum adsorptive capacities of HgCl{sub 2} were 1.75, 0.688, and 0.230 mg of HgCl{sub 2} per gram of powdered activated carbon derived from carbon black at 30, 70, and 150{sup o} for 500 {mu}g/m{sup 3} of HgCl{sub 2}, respectively. Four adsorption isotherms obtained using the Langmuir, Freundlich, Redlich-Peterson, and Brunauer-Emmett-eller (BET) models were used to simulate the adsorption of HgCl{sub 2}. The comparison of experimental data associated with the four adsorption isotherms indicated that BET fit the experimental results better than did the other isotherms at 30{sup o}, whereas the Freundlich isotherm fit the experimental results better at 70 and 150{sup o}. Furthermore, the calculations of the parameters associated with Langmuir and Freundlich isotherms revealed that the adsorption of HgCl{sub 2} by PAC-derived carbon black favored adsorption at various HgCl{sub 2} concentrations and temperatures. 35 refs., 7 figs., 3 tabs.

Hsun-Yu Lin; Chung-Shin Yuan; Wei-Ching Chen; Chung-Hsuang Hung [National Sun Yat-Sen University, Taiwan (China). Institute of Environmental Engineering

2006-11-15T23:59:59.000Z

419

CX-005112: Categorical Exclusion Determination | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

112: Categorical Exclusion Determination 112: Categorical Exclusion Determination CX-005112: Categorical Exclusion Determination Environmentally Benign and Permanent Surface Modifications to Prevent Biofueling on Marine and Hydrokinetic Devices CX(s) Applied: A9, B3.6 Date: 01/25/2011 Location(s): Cambridge, Massachusetts Office(s): Energy Efficiency and Renewable Energy, Golden Field Office Semprus BioSciences, in Cambridge, Massachusetts, is proposing to use Department of Energy funding to develop an innovative, nontoxic surface coating that would prevent the growth of aquatic organisms on marine and hydrokinetic (MHK) energy devices. This research into underwater coatings that prevent biofueling would have the potential to positively impact all MHK systems and improve the conversion efficiency for MHK systems.

420

Extreme water state produced by underwater wire-array electrical explosion  

SciTech Connect

The generation of an extreme water state (130 GPa, 5000 K, and 3.4 g/cm{sup 3}) which is characterized as dense plasma at the axis of a converging shock wave is reported. A 4 kJ pulse generator was used to explode a 40 Cu-wire array, generating a cylindrical shock wave. The measured shock wave trajectory and energy deposited into the water flow were used in hydrodynamic simulations coupled with the equation of state to determine the water parameters. The temperature estimated using the emission data of water in the vicinity of the implosion axis agrees with the simulation results, indicating shock wave symmetry in such extreme conditions.

Fedotov-Gefen, A.; Efimov, S.; Gilburd, L.; Gleizer, S.; Bazalitsky, G.; Gurovich, V. Tz.; Krasik, Ya. E. [Department of Physics, Technion, 32000 Haifa (Israel)

2010-05-31T23:59:59.000Z

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421

Wrought iron hand tools from the underwater archaelogical excavations of colonial Port Royal, Jamaica, C. 1692  

E-Print Network (OSTI)

The written history of Port Royal starts with the European discovery of Jamaica on Columbus' second voyage to the New World and has proven to be rich in shady characters and natural disasters. The English took possession of Jamaica from Spain in 1654 and the city of Port Royal was established soon after. Port Royal, located at the end of the Palisadoes sand spit, a natural barrier roughly six miles long, separates Kingston harbor and the Caribbean Sea. Originally functioning as a protective fortification of the harbor, it became an active harbor and the most economically important English colony in the New World from 1655-1692. Port Royal quickly earned the title of "Wickedest City on Earth" because of its reputation of officially sanctioned privateering and piratical expeditions, and the abundant supply of establishments of ill repute. On Wednesday June 7, 1692 a devastating earthquake struck Port Royal and destroyed a major portion of the city. A total of 33 acres, or 66% of the city, including buildings and people, at the very end of the sand spit, literally sank into the shallow harbor. It was not until the concentrated efforts of the Nautical Archaeology Program (under the direction of Dr. Donny L. Hamilton), The Institute of Nautical Archaeology, and the Jamaican government, started archaeological excavation from 1987-1993, that the real picture of this sunken city emerged. Through the excavation, mapping, and collection, conservation and analysis of artifacts the ghost image was brought back to life and interpreted. A large collection of iron hand tools from this site was preserved. These conserved and replicated artifacts are now available for analysis. This thesis is a continuation of the catalog of hand tools from the Port Royal excavations previously done by Ms. Marianne Franklin. It seeks to link the historical background of these artifacts to tool technology and the history of Port Royal and its tradesmen through the use of historical documents.

Custer, Katie Michelle

2004-01-01T23:59:59.000Z

422

CX-008668: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

on one end due to exposure to the reactor neutron flux during operations. A new underwater band saw is being installed temporarily in the Machine Basin for cutting the...

423

Dusky Dolphin (Lagenorhynchus obscurus) Underwater Bait-Balling Behaviors and Acoustic Signals: A Comparison Between Argentina and New Zealand  

E-Print Network (OSTI)

I characterized dusky dolphin (Lagenorhynchus obscurus) underwater bait-balling behaviors and acoustic signals, and compared data between Argentina and New Zealand (NZ) to investigate the roles of ecology versus social learning. I quantified prey herding and capturing behaviors from video footage, and I analyzed acoustic signals from narrowband recordings. In both locations, I related bait-balling behaviors and acoustic signals to group and prey ball sizes. In NZ, I also related dolphin behaviors to prey ball escape behaviors and acoustic signal parameters to examine proximate functions. Observed herding behaviors typically involved dolphins swimming around or under a prey ball using a side body orientation, while dolphins typically captured fish from the side of a prey ball using a ventral orientation. Coordinated prey-capture behaviors may have made it easier for dolphins to capture fish by trapping fish between dolphins. Signals were categorized as click trains, burst pulses, and combinations due to a bimodal inter-click interval distribution. I observed 3 whistle-like chirp-screams, but no whistles. Sequences of burst pulses also occurred that contained 2-14 burst pulses that aurally and visually appeared closely matched. Similarities between locations suggest that ecological context related to broad behavioral and acoustic parameters, while social learning differences may occur on a finer scale. In NZ, prey balls exhibited horizontal and vertical movements, but the only behavior that preceded escape was “funneling”, the brief formation of a ball shape where the height was at least twice the width. Dolphin behaviors that related to prey balls ascending were type of herding pass, location of prey-capture attempts, and body orientation during attempts. These behavioral parameters may also be used to counter vertical prey escape behaviors. In NZ, all signal categories had a direct or indirect role in capturing prey. Click train-burst pulses were likely used for echolocating on prey, burst pulses and sequences appeared to have communication roles, and the role of click trains was ambiguous. No signal categories appeared to have a herding function, but the sheer number of signals emitted may have caused fish to cluster together more tightly and therefore facilitated capture.

Vaughn, Robin

2011-08-01T23:59:59.000Z

424

Underwater Glider System Study  

E-Print Network (OSTI)

costs such as pumping energy, hotel load and travel time.Ee ~ 0.57, then the energy consumed by hotel loads, buoyancy99.9999% of total energy consumption is hotel loads. The

2003-01-01T23:59:59.000Z

425

Underwater Chemical Analyzer  

Science Conference Proceedings (OSTI)

Minimizing extended outage down time is critical to the success of a utility maintenance outage. During walk downs and/or outage inspections unforeseen issues are found that require immediate repair attention. ASME rules are in most cases the law by which most repairs of existing components must be followed in an attempt to provide for the safe and reliable operation of pressure components. As such there is a need to know the specific alloying elements that makeup the various types of materials that may ...

2005-12-12T23:59:59.000Z

426

Underwater measuring gage  

DOE Patents (OSTI)

A device for remotely measuring the diameter of wire rope. The device includes a linear variable differential tansducer, a mechanism to guide and clamp the rope in relation to the anvil of the transducer, an elongated handle for manually manipulating the transducer and the guide and clamp mechanism.

Lockhart, James L. (Pocatello, ID)

1989-01-01T23:59:59.000Z

427

Synergetic effects of double laser pulses for the formation of mild plasma in water: Toward non-gated underwater laser-induced breakdown spectroscopy  

Science Conference Proceedings (OSTI)

We experimentally study the dynamics of the plasma induced by the double-laser-pulse irradiation of solid target in water, and find that an appropriate choice of the pulse energies and pulse interval results in the production of an unprecedentedly mild (low-density) plasma, the emission spectra of which are very narrow even without the time-gated detection. The optimum pulse interval and pulse energies are 15-30 {mu}s and about {approx}1 mJ, respectively, where the latter values are much smaller than those typically employed for this kind of study. In order to clarify the mechanism for the formation of mild plasma we examine the role of the first and second laser pulses, and find that the first pulse produces the cavitation bubble without emission (and hence plasma), and the second pulse induces the mild plasma in the cavitation bubble. These findings may present a new phase of underwater laser-induced breakdown spectroscopy.

Sakka, Tetsuo [Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011 (Japan); Institute of Sustainability Science, Kyoto University, Uji, Kyoto 611-0011 (Japan); Tamura, Ayaka; Nakajima, Takashi; Fukami, Kazuhiro; Ogata, Yukio H. [Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011 (Japan)

2012-05-07T23:59:59.000Z

428

CX-008473: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination CX-008473: Categorical Exclusion Determination Effect of Climate Variability & Change in Hurricane Activity in the North Atlantic CX(s) Applied: A9...

429

CX-002981: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination CX-002981: Categorical Exclusion Determination Activity 7 - Solar Array at Airport American Recovery and Reinvestment Act - Energy Efficiency and...

430

CX-006754: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

54: Categorical Exclusion Determination CX-006754: Categorical Exclusion Determination Theory, Investigation and Stability of Cathode Electrocatalytic Activity CX(s) Applied: B3.6...

431

Determination of Plutonium Activity Concentrations and 240Pu/239Pu Atom Ratios in Brown Algae (Fucus distichus) Collected from Amchitka Island, Alaska.  

SciTech Connect

Plutonium-239 ({sup 239}Pu) and plutonium-240 ({sup 240}Pu) activity concentrations and {sup 240}Pu/{sup 239}Pu atom ratios are reported for Brown Algae (Fucus distichus) collected from the littoral zone of Amchitka Island (Alaska) and at a control site on the Alaskan peninsula. Plutonium isotope measurements were performed in replicate using Accelerator Mass Spectrometry (AMS). The average {sup 240}Pu/{sup 239}Pu atom ratio observed in dried Fucus d. collected from Amchitka Island was 0.227 {+-} 0.007 (n=5) and compares with the expected {sup 240}Pu/{sup 239}Pu atom ratio in integrated worldwide fallout deposition in the Northern Hemisphere of 0.1805 {+-} 0.0057 (Cooper et al., 2000). In general, the characteristically high {sup 240}Pu/{sup 239}Pu content of Fucus d. analyzed in this study appear to indicate the presence of a discernible basin-wide secondary source of plutonium entering the marine environment. Of interest to the study of plutonium source terms within the Pacific basin are reports of elevated {sup 240}Pu/{sup 239}Pu atom ratios in fallout debris from high-yield atmospheric nuclear tests conducted in the Marshall Islands during the 1950s (Diamond et al., 1960), the wide range of {sup 240}Pu/{sup 239}Pu atom ratio values (0.19 to 0.34) observed in sea water, sediments, coral and other environmental media from the North Pacific Ocean (Hirose et al., 1992; Buesseler, 1997) and updated estimates of the relative contributions of close-in and intermediate fallout deposition on oceanic inventories of radionuclidies, especially in the Northern Pacific Ocean (Hamilton, 2004).

Hamilton, T F; Brown, T A; Marchetti, A A; Martinelli, R E; Kehl, S R

2005-05-02T23:59:59.000Z

432

The efficiency of reverse engineering in the design of the ORCA XI autonomous underwater vehicle by Rachel E. Sharples.  

E-Print Network (OSTI)

Reverse engineering is the process of determining how a system works to aid duplication, maintenance, or redesign. Applications of reverse engineering include mechanical, electrical, software, and process systems. Although ...

Sharples, Rachel E

2010-01-01T23:59:59.000Z

433

PerMIS 2010 Plenary Addresses  

Science Conference Proceedings (OSTI)

... measuring the performance of the vehicle underwater and ... activities of our underwater vehicles with an ... of Electrical Engineering at McGill University. ...

2010-12-17T23:59:59.000Z

434

Determining age of whales  

NLE Websites -- All DOE Office Websites (Extended Search)

Determining age of whales Determining age of whales Name: Bruce W Walkey Age: N/A Location: N/A Country: N/A Date: N/A Question: While browsing through the Internet, I came upon a question by two fifth grade students. Their question got me thinking and now I pose it to you. How can you determine the age of whales? Since they are mammals, can the methods that are used on humans be used on whales? What are some tests that can be done on bones or tissues to determine age? Looking forward to your reply. Replies: Although it is difficult to determine the age of whales (unless they are born in captivity and we know their birth date), several methods have been commonly used: 1) (if female) the examination of the ovaries 2) Examination of the ridges on baleen, which are not uniform in size and analogous to tree rings. The problem with this is that baleen wears away over time. 3) Studying layers of ossification in an ear bone is probably the most accurate method of aging, since internal bones don't wear away. The biggest problem with aging methods is that they usually require that you are dissecting the animal, and often, we would like a method of aging for live active animals. The best we can do here is to compare the size and markings of whales of known age to those found in the wild. Great question!

435

Categorical Exclusion Determinations: Office of Energy Efficiency...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Determination Energy Efficiency and Conservation Block Grant Activity 1: Digester Biogas CX(s) Applied: B5.1 Date: 03222011 Location(s): Palm Beach County, Florida...

436

Categorical Exclusion Determinations: National Energy Technology...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination Optimization of Regenerators for Active Magnetic Regenerative Refrigeration (AMRR) Systems CX(s) Applied: A9, A11 Date: 08262010...

437

Categorical Exclusion Determinations: Office of Energy Efficiency...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination Optimization of Regenerators for Active Magnetic Regenerative Refrigeration (AMRR) Systems CX(s) Applied: A9, A11 Date: 08262010...

438

Categorical Exclusion Determinations: American Recovery and Reinvestme...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination Optimization of Regenerators for Active Magnetic Regenerative Refrigeration (AMRR) Systems CX(s) Applied: A9, A11 Date: 08262010...

439

CX-003535: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination Optimization of Regenerators for Active Magnetic Regenerative Refrigeration (AMRR) Systems CX(s) Applied: A9, A11 Date: 08262010...

440

Categorical Exclusion Determinations: American Recovery and Reinvestme...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Champaign, Illinois Office(s): Energy Efficiency and Renewable Energy, Golden Field Office May 20, 2010 CX-002371: Categorical Exclusion Determination Activity 2: Landfill...

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

CX-005389: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Determination Energy Efficiency and Conservation Block Grant Activity 1: Digester Biogas CX(s) Applied: B5.1 Date: 03222011 Location(s): Palm Beach County, Florida...

442

CX-002347: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination Activity 6.2.5 ? Outreach and Education for Hydrogen Production and Utilization CX(s) Applied: A9 Date: 05112010 Location(s): Grand...

443

The ANTARES underwater neutrino telescope  

E-Print Network (OSTI)

ANTARES is the first undersea neutrino telescope. It is in its complete configuration since May 2008 at about 2.5 km below the sea surface close to Marseille. Data from 12 lines are being analyzed and are producing first results. Here we discuss first analysis results for 5 lines and 10 lines, and we also comment on the performance of the full detector. We show that the detector has capabilities for discriminating upgoing neutrino events from the much larger amount of downgoing atmospheric muons and that data and simulation are in good agreement. We then discuss the physics reach of the detector for what concerns point-like source and dark matter searches.

Teresa Montaruli; for the ANTARES Collaboration

2008-10-21T23:59:59.000Z

444

Stability of Underwater Periodic Locomotion  

E-Print Network (OSTI)

Most aquatic vertebrates swim by lateral flapping of their bodies and caudal fins. While much effort has been devoted to understanding the flapping kinematics and its influence on the swimming efficiency, little is known about the stability (or lack of) of periodic swimming. It is believed that stability limits maneuverability and body designs/flapping motions that are adapted for stable swimming are not suitable for high maneuverability and vice versa. In this paper, we consider a simplified model of a planar elliptic body undergoing prescribed periodic heaving and pitching in potential flow. We show that periodic locomotion can be achieved due to the resulting hydrodynamic forces, and its value depends on several parameters including the aspect ratio of the body, the amplitudes and phases of the prescribed flapping. We obtain closed-form solutions for the locomotion and efficiency for small flapping amplitudes, and numerical results for finite flapping amplitudes. We then study the stability of the (finite amplitude flapping) periodic locomotion using Floquet theory. We find that stability depends nonlinearly on all parameters. Interesting trends of switching between stable and unstable motions emerge and evolve as we continuously vary the parameter values. This suggests that, for live organisms that control their flapping motion, maneuverability and stability need not be thought of as disjoint properties, rather the organism may manipulate its motion in favor of one or the other depending on the task at hand.

Fangxu Jing; Eva Kanso

2013-04-18T23:59:59.000Z

445

Categorical Exclusion Determination Form  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

t t Categorical Exclusion Determination Form Proposed Action Title: (0471-1563) University of South Florida - Development of a Low Cost Thermal Energy Storage System Using Phase Change Materials with Enhanced Radiation Heat Transfer Program or Field Office: Advanced Research Projects Agency - Energy Location(s) (City/County/State): Tampa, FL Proposed Action Description: Funding will support development of low cost, industrially scalable capsules containing high-temperature phase change materials (PCMs) for use in thermal energy storage (TES) systems to enable continuous power supply from concentrated solar thermal and nuclear power plants. No nuclear research and development activities will take place under this project. ARPA-E has undertaken a review of the work to be performed

446

Categorical Exclusion Determination Form  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ergy ergy Categorical Exclusion Determination Form Proposed Action Title: (0472-1569) G~tomics - Double Sator Switched Reluctance Motor (DSSRM) Technology Progi'am or Field Office: Advanced Research Projects Agency - Energy Location(s) (City/County/State): San Diego, CA Proposed Action Description: General Atomics, in conjunction with the University of Texas-Dallas (UT Dallas), proposes to develop double-stator switched reluctance motor (DSSRM) for electric vehicles (EVs) that will eliminate the use of permanent magnet-based motors that rely on rare earth metals in EVs. General Atomics' application was selected for an initial 18-month period (Phase 1) of funding. The ARPA-E Program Director may decide to negotiate and fund project activities for an additional 18-month period (Phase II) after evaluating the work performed in Phase I. ARPA-E has not obligated

447

Categorical Exclusion Determination Form  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

n rgy n rgy Categorical Exclusion Determination Form Proposed Action Title: (0474-1555) University of Colorado - Boulder - Wafer-Level Sub-Module Integrated DCfDC Converter Program or Field Office: Advanced Research Projects Agency - Energy LocationCs) CCity/County/State): Colorado, Maine, Virginia Proposed Action Description: Funding will support development of a planar, wafer-level sub-module integrated converter (SubMIC) device that can be integrated into various types of photovoltaic (PV) modules to enable low-cost maximum power point tracking at high power processing efficiencies. Proposed work consists of indoor laboratory-based research and development (R&D), microfabrication activities, and analytical research, including: (1) simulated modeling and design of SubMIC components and integrated units, (2) development, fabrication, testing, and optimization

448

Categorical Exclusion Determination Form  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

of n y of n y Categorical Exclusion Determination Form Proposed Action Title: (0471-1607) University of Florida - Solar Thermochemical Fuel Production via a Novel Low Pressure, Magnetically Stabilized, Non-Volatile Iron Oxide Looping Process Program or Field Office: Advanced Research Projects Agency - Energy LocationCs) CCity/County/State): Gainesville, FL Proposed Action Description: University of Florida proposes to develop a novel solar thermochemical reactor with inputs of water, recycled carbon dioxide (C02), and concentrated solar energy to cost-effectively produce Syngas, a renewable, carbon-neutral fuel. Project activities will include: (1) modeling, design, and fabrication of a high efficiency 1 OkW reactor prototype; (2) test analysis of bench-scale

449

CX-005941: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CX-005941: Categorical Exclusion Determination Laboratory Activities-University of Utah (Recipient) CX(s) Applied: A9, B3.6 Date: 06042011 Location(s): Salt Lake City, Utah...

450

CX-000372: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination Analysis of Microbial Activity Under a Supercritical Carbon Dioxide Atmosphere CX(s) Applied: A1, A9, B3.1, B3.6 Date: 11202009...

451

Categorical Exclusion Determinations: Office of Energy Efficiency...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

December 6, 2011 CX-008033: Categorical Exclusion Determination Energy Efficiency Retrofits and Renewable Energy Activity CX(s) Applied: B5.1, B5.18 Date: 12062011 Location(s):...

452

Categorical Exclusion Determinations: Office of Energy Efficiency...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination Statement of Work (SOW) For Activity 7 Community Energy Efficiency Incentives Program (Supercedes DE-EE0000777.002) CX(s) Applied: A9, A11,...

453

CX-002361: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination Testing of Modified Activated Carbon for Use in Hydrogen and Energy Storage CX(s) Applied: B3.6 Date: 05102010 Location(s): Grand Forks, North Dakota...

454

DOE Categorical Exclusion Determination Form  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

U.S. Department of Energy Categorical Exclusion Determination Form Program or Field Office: TRIBAL ENERGY PROGRAM Project Title SD-TEP-ROSEBUD SIOUX TRIBE Location: Tribal ROSEBUD SIOUX TRIBE SD American Recovery and Reinvestment Act: Proposed Action or Project Description The Rosebud Sioux Tribe (RST) and Citizens Wind propose to complete the required pre-construction activities necessary to secure funding for the proposed 190 MW North Antelope Highlands wind farm,

455

Categorical Exclusion Determinations: Michigan | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Michigan Michigan Categorical Exclusion Determinations: Michigan Location Categorical Exclusion Determinations issued for actions in Michigan. DOCUMENTS AVAILABLE FOR DOWNLOAD September 18, 2013 CX-010935: Categorical Exclusion Determination Active, Tailorable Adhesives for Dissimilar Material Bonding, Repair and Reassembly CX(s) Applied: B3.6 Date: 09/18/2013 Location(s): Michigan Offices(s): National Energy Technology Laboratory September 18, 2013 CX-010934: Categorical Exclusion Determination Active, Tailorable Adhesives for Dissimilar Material Bonding, Repair and Reassembly CX(s) Applied: B3.6 Date: 09/18/2013 Location(s): Michigan Offices(s): National Energy Technology Laboratory September 17, 2013 CX-010943: Categorical Exclusion Determination Polyalkylene Glycol Based Lubricant for Light and Medium Duty Vehicle Axles

456

Categorical Exclusion Determinations: A11 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination Optimization of Regenerators for Active Magnetic Regenerative Refrigeration (AMRR) Systems CX(s) Applied: A9, A11 Date: 08262010...

457

Activation detector  

DOE Patents (OSTI)

A method of detecting an activator, the method including impinging with an activator a receptor material lacking a photoluminescent material and generating a by-product of a radioactive decay due to the activator impinging the receptor material. The method further including, generating light from the by-product via the Cherenkov effect and identifying a characteristic of the activator based on the light.

Bell, Zane William (Oak Ridge, TN); Boatner, Lynn Allen (Oak Ridge, TN)

2009-12-08T23:59:59.000Z

458

DOE Categorical Exclusion Determination Form  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

WA WA Project Title WA-TEP-YAKAMA NATION Location: Tribal YAKAMA NATION American Recovery and Reinvestment Act: Proposed Action or Project Description The Yakama Nation Hydropower proposed project is for purchasing and installing a water turbine for Drop Site #4, located near Harrah, Washington, that would supplement the power generation for the Wapato Irrigation Project (WIP). Upon completion, Yakama Power would operate the hydroelectric project. Since Phase I of the proposed project is primarily for preliminary project assessments, permitting activities, environmental reviews, scoping meetings, preparation of the National Environmental Policy Act (NEPA) document, and pre-construction studies, DOE has determined that this phase of the project can be

459

Draft General Conformity Determination  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

I I Draft General Conformity Determination U.S. Department of the Interior Minerals Management Service MMS Cape Wind Energy Project January 2009 Final EIS Appendix I Draft General Conformity Determination Draft General Conformity Determination Cape Wind Energy Project Prepared by Minerals Management Service Herndon, VA November 2008 i TABLE OF CONTENTS 1.0 INTRODUCTION TO THE PROPOSED ACTION............................................................... 1 2.0 GENERAL CONFORMITY REGULATORY BACKGROUND .......................................... 2 2.1 GENERAL CONFORMITY REQUIREMENTS.................................................................... 2 2.2 GENERAL CONFORMITY APPLICABILITY.....................................................................

460

Categorical Exclusion Determinations: Environmental Management...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Environmental Management Categorical Exclusion Determinations: Environmental Management Categorical Exclusion Determinations issued by Environmental Management. DOCUMENTS AVAILABLE...

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Active security  

Science Conference Proceedings (OSTI)

In this paper we introduce active security, a new methodology which introduces programmatic control within a novel feedback loop into the defense infrastructure. Active security implements a unified programming environment which provides interfaces ... Keywords: central management, digital forensics, network security

Ryan Hand, Michael Ton, Eric Keller

2013-11-01T23:59:59.000Z

462

Categorical Exclusion Determinations: Legacy Management | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

December 22, 2011 December 22, 2011 CX-007752: Categorical Exclusion Determination Routine Activities at the Hallam, Nebraska, Decommissioned Reactor Site CX(s) Applied: B1.3, B1.24, B3.1 Date: 12/22/2011 Location(s): Nebraska Offices(s): Legacy Management December 14, 2011 CX-007441: Categorical Exclusion Determination Routine Actions at the Central Nevada Test Area CX(s) Applied: B1.3, B3.1 Date: 12/14/2011 Location(s): Nevada Offices(s): Legacy Management December 13, 2011 CX-007440: Categorical Exclusion Determination Routine Maintenance Activities at the Grand Junction Regional Airport, Colorado, Calibration Model Facility CX(s) Applied: B1.3, B1.24 Date: 12/13/2011 Location(s): Colorado Offices(s): Legacy Management December 13, 2011 CX-007439: Categorical Exclusion Determination

463

Categorical Exclusion Determinations: Virginia | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

November 19, 2012 November 19, 2012 CX-009637: Categorical Exclusion Determination Removing Items or Materials Containing Polychlorinated Biphenyls CX(s) Applied: B1.17 Date: 11/19/2012 Location(s): Tennessee, California, California, Virginia Offices(s): Oak Ridge Office November 19, 2012 CX-009636: Categorical Exclusion Determination Ventilation Activities CX(s) Applied: B1.4, B1.16, B2.1, B2.3 Date: 11/19/2012 Location(s): Tennessee, California, California, Virginia Offices(s): Oak Ridge Office November 19, 2012 CX-009652: Categorical Exclusion Determination Closure Activities Under the Resource Conservation and Recovery ACT CX(s) Applied: B1.28 Date: 11/19/2012 Location(s): Tennessee, California, California, Virginia Offices(s): Oak Ridge Office November 19, 2012 CX-009651: Categorical Exclusion Determination

464

Temperature determination using pyrometry  

DOE Patents (OSTI)

A method for determining the temperature of a surface upon which a coating is grown using optical pyrometry by correcting Kirchhoff's law for errors in the emissivity or reflectance measurements associated with the growth of the coating and subsequent changes in the surface thermal emission and heat transfer characteristics. By a calibration process that can be carried out in situ in the chamber where the coating process occurs, an error calibration parameter can be determined that allows more precise determination of the temperature of the surface using optical pyrometry systems. The calibration process needs only to be carried out when the physical characteristics of the coating chamber change.

Breiland, William G. (Albuquerque, NM); Gurary, Alexander I. (Bridgewater, NJ); Boguslavskiy, Vadim (Princeton, NJ)

2002-01-01T23:59:59.000Z

465

Estimating Realistic Confidence Intervals for the Activation Energy Determined from  

E-Print Network (OSTI)

for the Simul- taneous Measurement of Calorimetric and Rheological Evolutions", Rev. Sci. Instr., 79, 023905-008-0273-4 Titomanlio, G., et al., "On the Simulation of Thermoplastic Injection Moulding Process. 2 Relevance Lags during Poly- mer Solidification", Thermochim. Acta, 413, 101­110 (2004), DOI:10.1016/j.tca.2003

Utah, University of

466

Interim Action Determination  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Interim Action Determination Interim Action Determination Processing of Plutonium Materials from the DOE Standard 3013 Surveillance Program in H-Canyon at the Savannah River Site The Department of Energy (DOE) is preparing the Surplus Plutonium Disposition Supplemental Environmental Impact Statement (SPD SEIS, DOE/EIS-0283-S2). DOE is evaluating alternatives for disposition of non-pit plutonium that is surplus to the national

467

Solids mass flow determination  

DOE Patents (OSTI)

Method and apparatus for determining the mass flow rate of solids mixed with a transport fluid to form a flowing mixture. A temperature differential is established between the solids and fluid. The temperature of the transport fluid prior to mixing, the temperature of the solids prior to mixing, and the equilibrium temperature of the mixture are monitored and correlated in a heat balance with the heat capacities of the solids and fluid to determine the solids mass flow rate.

Macko, Joseph E. (Hempfield Township, Westmoreland County, PA)

1981-01-01T23:59:59.000Z

468

Electrical Resistivity Imaging for Unknown Bridge Foundation Depth Determination  

E-Print Network (OSTI)

Unknown bridge foundations pose a significant safety risk due to stream scour and erosion. Records from older structures may be non-existent, incomplete, or incorrect. Nondestructive and inexpensive geophysical methods have been identified as suitable to investigate unknown bridge foundations. The objective of the present study is to apply advanced 2D electrical resistivity imaging (ERI) in order to identify depth of unknown bridge foundations. A survey procedure is carried out in mixed terrain water and land environments with rough topography. A conventional resistivity survey procedure is used with the electrodes installed on the stream banks. However, some electrodes must be adapted for underwater use. Tests were conducted in one laboratory experimentation and at five field experimentations located at three roadway bridges, a geotechnical test site, and a railway bridge. The first experimentation was at the bridges with the smallest foundations, later working up in size to larger drilled shafts and spread footings. Both known to unknown foundations were investigated. The geotechnical test site is used as an experimental site for 2D and 3D ERI. The data acquisition is carried out along 2D profile with a linear array in the dipole-dipole configuration. The data collections have been carried out using electrodes deployed directly across smaller foundations. Electrodes are deployed in proximity to larger foundations to image them from the side. The 2D ERI can detect the presence of a bridge foundation but is unable to resolve its precise shape and depth. Increasing the spatial extent of the foundation permits better image of its shape and depth. Using electrode < 1 m to detect a slender foundation < 1 m in diameter is not feasible. The 2D ERI method that has been widely used for land surface surveys presently can be adapted effectively in water-covered environments. The method is the most appropriate geophysical method for determination of unknown bridge foundations. Fully 3D ERI method at bridge sites is labor intensive, time consuming, and does not add enough value over 2D ERI to make it worthwhile.

Arjwech, Rungroj

2011-12-01T23:59:59.000Z

469

Categorical Exclusion Determinations: West Valley Demonstration Project |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Valley Demonstration Valley Demonstration Project Categorical Exclusion Determinations: West Valley Demonstration Project Categorical Exclusion Determinations issued by West Valley Demonstration Project. DOCUMENTS AVAILABLE FOR DOWNLOAD July 11, 2013 CX-010718: Categorical Exclusion Determination Replacement Ventilation System for the Main Plant Process Building CX(s) Applied: B6.3 Date: 07/11/2013 Location(s): New York Offices(s): West Valley Demonstration Project December 20, 2012 CX-009527: Categorical Exclusion Determination WVDP-2012-02 Routine Maintenance CX(s) Applied: B1.3 Date: 12/20/2012 Location(s): New York Offices(s): West Valley Demonstration Project August 2, 2012 CX-009528: Categorical Exclusion Determination WVDP-2012-01 WVDP Reservoir Interconnecting Canal Maintenance Activities

470

Categorical Exclusion Determinations: Mississippi | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Mississippi Mississippi Categorical Exclusion Determinations: Mississippi Location Categorical Exclusion Determinations issued for actions in Mississippi. DOCUMENTS AVAILABLE FOR DOWNLOAD August 5, 2010 CX-003296: Categorical Exclusion Determination Hydrate Research Activities that both Support and Derive from the Monitoring Station/Sea-Floor Observatory CX(s) Applied: B3.6, B3.11 Date: 08/05/2010 Location(s): Mississippi Office(s): Fossil Energy, National Energy Technology Laboratory July 1, 2010 CX-002926: Categorical Exclusion Determination Mississippi-County-DeSoto CX(s) Applied: B2.5, A9, B5.1 Date: 07/01/2010 Location(s): DeSoto County, Mississippi Office(s): Energy Efficiency and Renewable Energy June 25, 2010 CX-002795: Categorical Exclusion Determination Market Transformation and Technology Deployment - Renewable Energy Projects

471

Categorical Exclusion Determinations: Legacy Management | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Legacy Management Legacy Management Categorical Exclusion Determinations: Legacy Management Categorical Exclusion Determinations issued by Legacy Mangement. DOCUMENTS AVAILABLE FOR DOWNLOAD May 28, 2013 CX-010396: Categorical Exclusion Determination Bioremediation Injection and Related Activities at the Pinellas Site, Largo, Florida CX(s) Applied: B3.1, B6.1 Date: 05/28/2013 Location(s): Florida Offices(s): Legacy Management May 28, 2013 CX-010533: Categorical Exclusion Determination Road Maintenance on roads Used to Access Groundwater Monitoring Wells South of the Tuba City, Arizona, Uranium Mill Tailing Remedial Action Title I Site CX(s) Applied: B1.3, B3.3, B6.1 Date: 05/28/2013 Location(s): Arizona Offices(s): Legacy Management November 2, 2012 CX-009399: Categorical Exclusion Determination

472

Protein Energy Landscapes Determined by 5-Dimensional Crystallography  

E-Print Network (OSTI)

Free energy landscapes decisively determine the progress of enzymatically catalyzed reactions[1]. Time-resolved macromolecular crystallography unifies transient-state kinetics with structure determination [2-4] because both can be determined from the same set of X-ray data. We demonstrate here how barriers of activation can be determined solely from five-dimensional crystallography [5]. Directly linking molecular structures with barriers of activation between them allows for gaining insight into the structural nature of the barrier. We analyze comprehensive time series of crystal-lographic data at 14 different temperature settings and determine entropy and enthalpy contributions to the barriers of activation. 100 years after the discovery of X-ray scattering, we advance X-ray structure determination to a new frontier, the determination of energy landscapes.

Schmidt, Marius; Henning, Robert; Ihee, Hyotcherl; Purwar, Namrta; Tenboer, Jason; Tripathi, Shailesh

2013-01-01T23:59:59.000Z

473

HEU age determination  

SciTech Connect

A new technique has been developed to determine the age of highly enriched uranium (HEU) in solids. Uranium age is defined as the time since the uranium-containing material was last subjected to a process capable of separating uranium from its radioactive-decay daughters. [Most chemical processing, uranium enrichment, volatilization processes, and phase transformations (especially relevant for uranium hexafluoride) can result in separation of the uranium parent material from the decay-product daughters.] Determination of the uranium age, as defined here, may be relevant in verifying arms-control agreements involving uranium-containing nuclear weapons. The HEU age is determined from the ratios of relevant uranium daughter isotopes and their parents, viz {sup 230}Th/{sup 234}U and {sup 231}Pa/{sup 235}U. Uranium isotopes are quantitatively measured by their characteristic gamma rays and their daughters by alpha spectroscopy. In some of the samples, where HEU is enriched more than 99%, the only mode of HEU age determination is by the measurement of {sup 231}Pa since there is negligible quantity of {sup 230}Th due to very low atom concentrations of {sup 234}U in the samples. In this report the methodology and the data for determining the age of two HEU samples are presented.

Moorthy, A.R.; Kato, W.Y.

1997-07-01T23:59:59.000Z

474

CX-002036: Categorical Exclusion Determination | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

36: Categorical Exclusion Determination 36: Categorical Exclusion Determination CX-002036: Categorical Exclusion Determination Pinellas County, Florida CX(s) Applied: A9, A11, B5.1 Date: 03/31/2010 Location(s): Pinellas County, Florida Office(s): Energy Efficiency and Renewable Energy, Golden Field Office The following activities fall within the bounds of the signed Statement of Work (SOW) and are therefore categorically excluded under the National Environmental Policy Act (NEPA): Activity 2: Community Energy Program - Educational/Outreach activities; Activity 4: Solar Powered Traffic Control Device Replacements; Activity 5: Land Development Code Modifications to incorporate Energy Conservation Provisions; Activity 6: Green Homes Program (with the exception of the following sub-activities: natural gas on demand

475

CX-001534: Categorical Exclusion Determination | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

34: Categorical Exclusion Determination 34: Categorical Exclusion Determination CX-001534: Categorical Exclusion Determination Lake County, Florida Energy Efficiency and Conservation Block Grant Statement of Work (S) CX(s) Applied: A9, A11, B5.1 Date: 03/31/2010 Location(s): Lake County, Florida Office(s): Energy Efficiency and Renewable Energy, Golden Field Office Energy Efficiency and Conservation Block Grant funds. The following activities fall within the bounds of the signed Statement of Work (SOW) and therefore are categorically excluded under National Environmental Policy Act (NEPA): Activity #2 Incentive Funds, Activity #3 Benchmarking, Education, and Outreach, Activity #4 Quality Inspection, Measurement, and Building Codes, Activity #5 Traffic Signal Synchronization, Activity #6 Expansion of County Recycling Program, Activity #8 Renewable Energy

476

CX-001537: Categorical Exclusion Determination | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

7: Categorical Exclusion Determination 7: Categorical Exclusion Determination CX-001537: Categorical Exclusion Determination Pinellas County, Florida CX(s) Applied: A9, A11, B5.1 Date: 03/31/2010 Location(s): Pinellas County, Florida Office(s): Energy Efficiency and Renewable Energy, Golden Field Office The following activities fall within the bounds of the signed Statement of Work (SOW) and therefore are categorically excluded under National Environmental Policy Act (NEPA): Activity 2. Community Energy Program - Educational Outreach activities, Activity 4. Solar Powered Traffic Control Device Replacements, Activity 5. Land Development Code Modifications to incorporate Energy Conservation Provisions, Activity 6. Green Homes Program heaters and installation of reflective roof replacements, Activity 7.

477

HEU age determination  

SciTech Connect

A technique has been developed to determine the Highly Enriched Uranium (HEU) Age which is defined as the time since the HEU was produced in an enrichment process. The HEU age is determined from the ratios of relevant uranium parents and their daughters viz {sup 230}Th/{sup 234}U and {sup 231}Pa/{sup 235}U. Uranium isotopes are quantitatively measured by their characteristic gammas and their daughters by alpha spectroscopy. In some of the samples where HEU is enriched more than 99%, the only mode of HEU age determination is by the measurement of {sup 231}Pa since there is negligible quantity of {sup 230}Th due to very low atom concentrations of {sup 234}U in the sample. In this paper we have presented data and methodology of finding the age of two HEU samples.

Moorthy, A.R.; Kato, W.Y.

1995-08-01T23:59:59.000Z

478

Determining Reactor Neutrino Flux  

E-Print Network (OSTI)

Flux is an important source of uncertainties for a reactor neutrino experiment. It is determined from thermal power measurements, reactor core simulation, and knowledge of neutrino spectra of fuel isotopes. Past reactor neutrino experiments have determined the flux to (2-3)% precision. Precision measurements of mixing angle $\\theta_{13}$ by reactor neutrino experiments in the coming years will use near-far detector configurations. Most uncertainties from reactor will be canceled out. Understanding of the correlation of uncertainties is required for $\\theta_{13}$ experiments. Precise determination of reactor neutrino flux will also improve the sensitivity of the non-proliferation monitoring and future reactor experiments. We will discuss the flux calculation and recent progresses.

Cao, Jun

2011-01-01T23:59:59.000Z

479

Determining Reactor Neutrino Flux  

E-Print Network (OSTI)

Flux is an important source of uncertainties for a reactor neutrino experiment. It is determined from thermal power measurements, reactor core simulation, and knowledge of neutrino spectra of fuel isotopes. Past reactor neutrino experiments have determined the flux to (2-3)% precision. Precision measurements of mixing angle $\\theta_{13}$ by reactor neutrino experiments in the coming years will use near-far detector configurations. Most uncertainties from reactor will be canceled out. Understanding of the correlation of uncertainties is required for $\\theta_{13}$ experiments. Precise determination of reactor neutrino flux will also improve the sensitivity of the non-proliferation monitoring and future reactor experiments. We will discuss the flux calculation and recent progresses.

Jun Cao

2011-01-12T23:59:59.000Z

480

Categorical Exclusion Determinations: Environmental Management...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Consolidated Business Service Center Categorical Exclusion Determinations: Environmental Management Consolidated Business Service Center Categorical Exclusion Determinations issued...

Note: This page contains sample records for the topic "determination underwater active" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Catalyst activator  

DOE Patents (OSTI)

A catalyst activator particularly adapted for use in the activation of metal complexes of metals of Group 3-10 for polymerization of ethylenically unsaturated polymerizable monomers, especially olefins, comprising two Group 13 metal or metalloid atoms and a ligand structure including at least one bridging group connecting ligands on the two Group 13 metal or metalloid atoms.

McAdon, Mark H. (Midland, MI); Nickias, Peter N. (Midland, MI); Marks, Tobin J. (Evanston, IL); Schwartz, David J. (Lake Jackson, TX)

2001-01-01T23:59:59.000Z

482

Categorical Exclusion Determinations: Missouri | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

April 7, 2010 April 7, 2010 CX-001492: Categorical Exclusion Determination City of Saint Louis Missouri Statement of Work and All Activities Excluding Bike Station Project CX(s) Applied: A9, A11, B5.1 Date: 04/07/2010 Location(s): St. Louis, Missouri Office(s): Energy Efficiency and Renewable Energy, Golden Field Office April 7, 2010 CX-001611: Categorical Exclusion Determination Traffic Signal Synchronization Center CX(s) Applied: B1.15, B5.1 Date: 04/07/2010 Location(s): Kansas City, Missouri Office(s): Energy Efficiency and Renewable Energy, Golden Field Office March 31, 2010 CX-001556: Categorical Exclusion Determination Energy Efficiency and Conservation Block Grant Activities Covered by Statement of Work (V3) CX(s) Applied: A9, A11, B5.1 Date: 03/31/2010 Location(s): St. Louis County, Missouri

483

Gender determination in populus  

DOE Green Energy (OSTI)

Gender, the expression of maleness or femaleness, in dioecious plants has been associated with changes in morphology, physiology, ecological position, and commercial importance of several species, including members of the Salicaceae family. Various mechanisms have been proposed to explain the expression of gender in Salicaceae, including sex chromosomes, simple Mendelian genes, quantitative genes, environment, and genotype-by-environment interactions. Published reports would favor a genetic basis for gender. The objective of this study was to identify molecular markers associated with gender in a segregating family of hybrid poplars. Bulked segregant analysis and chi-squared analysis were used to test for the occurrence of sex chromosomes, individual loci, and chromosome ratios (i.e., ploidy levels) as the mechanisms for gender determination. Examination of 2488 PCR based RAPD markers from 1219 primers revealed nine polymorphic bands between male and female bulked samples. However, linkage analysis indicated that none of these markers were significantly associated with gender. Chisquared results for difference in male-to-female ratios between diploid and triploid genotypes also revealed no significant differences. These findings suggest gender is not controlled via sex chromosomes, simple Mendelian loci or ratios of autosome to gender-determining loci. It is possible that gender is determined genetically by regions of the genome not sampled by the tested markers or by a complex of loci operating in an additive threshold manner or in an epistatic manner. It is also possible that gender is determined environmentally at an early zygote stage, canalizing gender expression.

McLetchie, D.N. [Univ. of Kentucky, Lexington, KY (United States). Dept. of Biological Sciences; Tuskan, G.A. [Oak Ridge National Lab., TN (United States)

1994-12-31T23:59:59.000Z

484

CX-002370: Categorical Exclusion Determination | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

70: Categorical Exclusion Determination 70: Categorical Exclusion Determination CX-002370: Categorical Exclusion Determination Jefferson Parish New Activities (S) [Activities 5,6,7] CX(s) Applied: A9, A11, B5.1 Date: 05/13/2010 Location(s): Jefferson Parish, Louisiana Office(s): Energy Efficiency and Renewable Energy, Golden Field Office The city would utilize Energy Efficiency and Conservation Block Grant funds to cover the incremental cost of purchasing approximately four light duty hybrid vehicles (Activity #7: Hybrid Vehicles). Other activities include: #5 Energy Retrofits for Parish Buildings and #6 Energy Efficient Street Lighting Program. DOCUMENT(S) AVAILABLE FOR DOWNLOAD CX-002370.pdf More Documents & Publications CX-001547: Categorical Exclusion Determination CX-004853: Categorical Exclusion Determination

485

Categorical Exclusion (CX) Determination  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

North Oakes tap of the Edgeley to Forman 69 kV line North Oakes tap of the Edgeley to Forman 69 kV line Description of Proposed Action: Central Power Electric Cooperative is proposing to tap into the Western Area Power Administration (Western) Edgeley to Forman 69 kV transmission line with a new substation to meet load growth in the Southeastern North Dakota area. Number and Title of Categorical Exclusions Being Applied: 10 CFR 1021.410 Subpart D, Appendix B, B4.11: Construction of electric power substations ... or modification of existing substations and support facilities. Regulatory Requirements for CX Determination: The DOE Guidelines for Compliance with the Regulatory Requirements for the National Environmental Policy Act at 10 CFR 1021.410(b), require the following determinations be made in order for a proposed action to be categorically

486

NEWTON: Determining Material Degradation  

NLE Websites -- All DOE Office Websites (Extended Search)

Determining Material Degradation Determining Material Degradation Name: Hamish Status: student Grade: 6-8 Location: CA Country: USA Date: Summer 2013 Question: I am working on a science project about photo-degradation of plastic film. My question is how much degraded a plastic film should be to say that it was 100% photo-degraded? The plastic film I am photo-degrading is turning into dust when I touch it, what level of degradation is that? Replies: Hi Hamish, Thanks for the question. You will need to define what you mean by photo-degraded. 100% photo-degraded could be that the film becomes translucent and lets through only blurry images. Or it could mean that the film turns to dust when you touch it. As long as you clearly state in your science project what you mean by 100% photo-degraded, you will be doing a good job.

487

Categorical Exclusion (CX) Determination  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Circle substation expansion Circle substation expansion Description of Proposed Action: Expansion of the Circle substation approximately 4 acres to the south for the purpose of adding additional bays for the Keystone XL pipeline project. Number and Title of Categorical Exclusions Being Applied: 10 CFR 1021.410 Subpart D, Appendix B, B4.11: Construction of electric power substations ... or modification of existing substations and support facilities. Regulatory Requirements for CX Determination: The DOE Guidelines for Compliance with the Regulatory Requirements for the National Environmental Policy Act at 10 CFR 1021.410(b), require the following determinations be made in order for a proposed action to be categorically excluded from National Environmentally Policy Act (NEPA) review:

488

Categorical Exclusion (CX) Determination  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Addition of a new substation near Lake Bowdoin, MT. Addition of a new substation near Lake Bowdoin, MT. Description of Proposed Action: Addition of a new substation near Lake Bowdoin on Western's Fort Peck to Havre 161 k V transmission line for the purpose of providing power for a Keystone XL pipeline project pump station. Number and Title of Categorical Exclusions Being Applied: 10 CFR 1021.410 Subpart D, Appendix B, B4.11: Construction of electric power substations ... or modification of existing substations and support facilities. Regulatory Requirements for CX Determination: The DOE Guidelines for Compliance with the Regulatory Requirements for the National Environmental Policy Act at 10 CFR 1021.41 O(b), require the following determinations be made in order for a proposed action to be categorically

489

Chemical Activation  

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Chemical Activation of Single-walled Carbon Nanotubes for Hydrogen Adsorption Milton R. Smith, Jr., 1 Edward W. Bittner, 1 Wei Shi, 1, 2 J. Karl Johnson, 1, 2 and Bradley C....

490

Categorical Exclusion Determinations: American Recovery and Reinvestment  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

919: Categorical Exclusion Determination 919: Categorical Exclusion Determination Activity 13, Energy Audits and Retro Commissioning CX(s) Applied: A9, A11, B5.1 Date: 04/22/2010 Location(s): Fairfax County, Virginia Office(s): Energy Efficiency and Renewable Energy, Golden Field Office April 22, 2010 CX-001916: Categorical Exclusion Determination Ohio American Recover and Reinvestment Act State Energy Program Deploying Renewable Energy, Bedford Solar CX(s) Applied: B5.1 Date: 04/22/2010 Location(s): Bedford, Ohio Office(s): Energy Efficiency and Renewable Energy, Golden Field Office April 22, 2010 CX-002106: Categorical Exclusion Determination Wisconsin-Tribal Energy Program-Forest County Potawatomi Community CX(s) Applied: B2.5, B5.1 Date: 04/22/2010 Location(s): Forest County, Wisconsin Office(s): Energy Efficiency and Renewable Energy

491

Categorical Exclusion Determinations: Savannah River Operations Office |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

November 29, 2012 November 29, 2012 CX-009607: Categorical Exclusion Determination 772-F Low-Activity Drain (LAD) Discharge Header Modification CX(s) Applied: B1.3 Date: 11/29/2012 Location(s): South Carolina Offices(s): Savannah River Operations Office November 29, 2012 CX-008651: Categorical Exclusion Determination Dismantle and Remove (D&R) and Replace 773-A D-Wing Air Handling and Condensing Units CX(s) Applied: B1.3 Date: 05/17/2012 Location(s): South Carolina Offices(s): Savannah River Operations Office November 29, 2012 CX-009608: Categorical Exclusion Determination Refurbish 607-53C Sanitary Sewer Lift Station CX(s) Applied: B1.3 Date: 11/29/2012 Location(s): South Carolina Offices(s): Savannah River Operations Office November 27, 2012 CX-009611: Categorical Exclusion Determination

492

Categorical Exclusion Determinations: Tennessee | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

November 19, 2012 November 19, 2012 CX-009638: Categorical Exclusion Determination Replacement, Removal, and Closure of Underground Storage Tanks CX(s) Applied: B2.5, B6.1 Date: 11/19/2012 Location(s): Tennessee, California, California, Virginia Offices(s): Oak Ridge Office November 19, 2012 CX-009637: Categorical Exclusion Determination Removing Items or Materials Containing Polychlorinated Biphenyls CX(s) Applied: B1.17 Date: 11/19/2012 Location(s): Tennessee, California, California, Virginia Offices(s): Oak Ridge Office November 19, 2012 CX-009636: Categorical Exclusion Determination Ventilation Activities CX(s) Applied: B1.4, B1.16, B2.1, B2.3 Date: 11/19/2012 Location(s): Tennessee, California, California, Virginia Offices(s): Oak Ridge Office November 19, 2012 CX-009652: Categorical Exclusion Determination

493

Categorical Exclusion Determinations: Savannah River Operations Office |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

April 16, 2013 April 16, 2013 CX-010322: Categorical Exclusion Determination Research and Development Welding and Brazing Sample Preparation and Activities in Building 723-A CX(s) Applied: B3.6 Date: 04/16/2013 Location(s): South Carolina Offices(s): Savannah River Operations Office April 16, 2013 CX-010321: Categorical Exclusion Determination Destructive Evaluation of Plutonium Storage Can Bundles CX(s) Applied: B3.6 Date: 04/16/2013 Location(s): South Carolina Offices(s): Savannah River Operations Office April 16, 2013 CX-010320: Categorical Exclusion Determination Corrosion Testing in Aqueous Solutions CX(s) Applied: B3.6 Date: 04/16/2013 Location(s): South Carolina Offices(s): Savannah River Operations Office April 15, 2013 CX-010324: Categorical Exclusion Determination 772-F Chase 174 Sprinkler Modification

494

Method for Determining Solids Circulation Rate  

NLE Websites -- All DOE Office Websites (Extended Search)

Determining Solids Circulation Rate Determining Solids Circulation Rate Contact NETL Technology Transfer Group techtransfer@netl.doe.gov May 2012 Opportunity Research is currently active on the patented technology "Method for Determining Solids Circulation Rate." The technology is available for licensing and/or further collaborative research from the U.S. Department of Energy's National Energy Technology Laboratory. Overview This invention provides a method to measure the rate of solids circulation, particularly in those applications where the solids are recycled back to pro- cesses for further use. The applications include processes such as circulating fluidized bed gasifiers and combustors, as well as chemical looping. In the above applications, determining solids circulation rates is needed to

495

Categorical Exclusion Determinations: New Brunswick Laboratory | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

New Brunswick Laboratory New Brunswick Laboratory Categorical Exclusion Determinations: New Brunswick Laboratory Categorical Exclusion Determinations issued by New Brunswick Laboratory. DOCUMENTS AVAILABLE FOR DOWNLOAD June 8, 2012 CX-008816: Categorical Exclusion Determination Renovations and Maintenance Activities for Buildings, Structures, Infrastructures and Equipment CX(s) Applied: B1.3, 61.4, 61.5, B1.11, B1.15, B1.16, B1.17, 81.22, B1.27, 62.1, B2.2, B2.3, 62.5 Date: 06/08/2012 Location(s): Illinois Offices(s): New Brunswick Laboratory June 8, 2012 CX-008817: Categorical Exclusion Determination Indoor Bench Scale Research Projects and Conventional Laboratory Operations CX(s) Applied: B3.6 Date: 06/08/2012 Location(s): Illinois Offices(s): New Brunswick Laboratory December 10, 2009

496

Categorical Exclusion Determinations: California | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

November 19, 2012 November 19, 2012 CX-010357: Categorical Exclusion Determination Replacement Removal and Closure of Underground Storage Tanks USTs CX(s) Applied: B2.5; B6.1 Date: 11/19/2012 Location(s): Tennessee, California, Virginia Offices(s): Berkeley Site Office November 19, 2012 CX-010356: Categorical Exclusion Determination Site Characterization Investigation and Environmental Monitoring Activities CX(s) Applied: B3.1 Date: 11/19/2012 Location(s): Tennessee, California, Virginia Offices(s): Berkeley Site Office November 19, 2012 CX-010355: Categorical Exclusion Determination Training Exercises and Simulation Projects CX(s) Applied: B1.2 Date: 11/19/2012 Location(s): Tennessee, California, Virginia Offices(s): Berkeley Site Office November 19, 2012 CX-010354: Categorical Exclusion Determination

497

Categorical Exclusion Determinations: RMOTC | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

August 6, 2011 August 6, 2011 CX-006696: Categorical Exclusion Determination Maintenance / Grading of Existing Roads and Road Drainages (Barrow Ditches) CX(s) Applied: B1.3 Date: 08/06/2011 Location(s): Casper, Wyoming Office(s): RMOTC August 6, 2011 CX-006711: Categorical Exclusion Determination Reclamation of Decommissioned Batteries, Test Satellites, and Facilities CX(s) Applied: B1.3, B6.1 Date: 08/06/2011 Location(s): Casper, Wyoming Office(s): RMOTC July 13, 2011 CX-006694: Categorical Exclusion Determination Repetitive/Routine Maintenance Activities CX(s) Applied: B1.3 Date: 07/13/2011 Location(s): Casper, Wyoming Office(s): RMOTC June 7, 2011 CX-006692: Categorical Exclusion Determination Work on Existing Well Location (Within 125 Feet from Well Bore) CX(s) Applied: B5.12

498

Categorical Exclusion Determinations: National Energy Technology Laboratory  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

7, 2012 7, 2012 CX-008473: Categorical Exclusion Determination Effect of Climate Variability & Change in Hurricane Activity in the North Atlantic CX(s) Applied: A9 Date: 06/07/2012 Location(s): Colorado Offices(s): National Energy Technology Laboratory June 7, 2012 CX-008472: Categorical Exclusion Determination Midwest Region Alternative Fuels Project CX(s) Applied: B5.22 Date: 06/07/2012 Location(s): Kansas Offices(s): National Energy Technology Laboratory June 4, 2012 CX-008482: Categorical Exclusion Determination Composite Riser for Ultra-Deepwater High Pressure Wells CX(s) Applied: A9, A11 Date: 06/04/2012 Location(s): Texas Offices(s): National Energy Technology Laboratory June 4, 2012 CX-008480: Categorical Exclusion Determination Composite Riser for Ultra-Deepwater High Pressure Wells

499

Categorical Exclusion Determinations: Savannah River Operations Office |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

November 1, 2012 November 1, 2012 CX-009620: Categorical Exclusion Determination Next Generation Solvent (NGS) Real Waste Testing CX(s) Applied: B3.6 Date: 11/01/2012 Location(s): South Carolina Offices(s): Savannah River Operations Office October 31, 2012 CX-009624: Categorical Exclusion Determination High Activity Waste Trailer (HAWT) Disposition CX(s) Applied: B3.1 Date: 10/31/2012 Location(s): South Carolina Offices(s): Savannah River Operations Office October 31, 2012 CX-009623: Categorical Exclusion Determination Technetium Precipitation Batch Testing CX(s) Applied: B3.6 Date: 10/31/2012 Location(s): South Carolina Offices(s): Savannah River Operations Office October 25, 2012 CX-009625: Categorical Exclusion Determination Preparation and Temperature-Time Settling Treatment of Rheology Samples

500

Categorical Exclusion Determinations: Texas | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

December 13, 2011 December 13, 2011 CX-007439: Categorical Exclusion Determination Routine Maintenance Activities at the George West, Texas, Calibration Model Facility CX(s) Applied: B1.3, B1.24 Date: 12/13/2011 Location(s): Texas Offices(s): Legacy Management December 13, 2011 CX-007426: Categorical Exclusion Determination Sharyland Independent School District CX(s) Applied: B5.16 Date: 12/13/2011 Location(s): Texas Offices(s): Golden Field Office December 13, 2011 CX-007425: Categorical Exclusion Determination Nazareth Independent School District Wind Project CX(s) Applied: B5.18 Date: 12/13/2011 Location(s): Texas Offices(s): Golden Field Office December 13, 2011 CX-007424: Categorical Exclusion Determination City of Houston Wind Project CX(s) Applied: B5.16, B5.18 Date: 12/13/2011