Sample records for vibration environment view

  1. Testing a combined vibration and acceleration environment.

    SciTech Connect (OSTI)

    Jepsen, Richard Alan; Romero, Edward F.

    2005-01-01T23:59:59.000Z

    Sandia National Laboratories has previously tested a capability to impose a 7.5 g-rms (30 g peak) radial vibration load up to 2 kHz on a 25 lb object with superimposed 50 g acceleration at its centrifuge facility. This was accomplished by attaching a 3,000 lb Unholtz-Dickie mechanical shaker at the end of the centrifuge arm to create a 'Vibrafuge'. However, the combination of non-radial vibration directions, and linear accelerations higher than 50g's are currently not possible because of the load capabilities of the shaker and the stresses on the internal shaker components due to the combined centrifuge acceleration. Therefore, a new technique using amplified piezo-electric actuators has been developed to surpass the limitations of the mechanical shaker system. They are lightweight, modular and would overcome several limitations presented by the current shaker. They are 'scalable', that is, adding more piezo-electric units in parallel or in series can support larger-weight test articles or displacement/frequency regimes. In addition, the units could be mounted on the centrifuge arm in various configurations to provide a variety of input directions. The design along with test results will be presented to demonstrate the capabilities and limitations of the new piezo-electric Vibrafuge.

  2. Instantaneous normal mode analysis for intermolecular and intramolecular vibrations of water from atomic point of view

    SciTech Connect (OSTI)

    Chen, Yu-Chun; Tang, Ping-Han [Institute of Physics, National Chiao-Tung University, Hsinchu 300, Taiwan (China)] [Institute of Physics, National Chiao-Tung University, Hsinchu 300, Taiwan (China); Wu, Ten-Ming, E-mail: tmw@faculty.nctu.edu.tw [Institute of Physics, National Chiao-Tung University, Hsinchu 300, Taiwan (China) [Institute of Physics, National Chiao-Tung University, Hsinchu 300, Taiwan (China); National Center for Theoretical Sciences, Hsinchu 300, Taiwan (China)

    2013-11-28T23:59:59.000Z

    By exploiting the instantaneous normal mode (INM) analysis for models of flexible molecules, we investigate intermolecular and intramolecular vibrations of water from the atomic point of view. With two flexible SPC/E models, our investigations include three aspects about their INM spectra, which are separated into the unstable, intermolecular, bending, and stretching bands. First, the O- and H-atom contributions in the four INM bands are calculated and their stable INM spectra are compared with the power spectra of the atomic velocity autocorrelation functions. The unstable and intermolecular bands of the flexible models are also compared with those of the SPC/E model of rigid molecules. Second, we formulate the inverse participation ratio (IPR) of the INMs, respectively, for the O- and H-atom and molecule. With the IPRs, the numbers of the three species participated in the INMs are estimated so that the localization characters of the INMs in each band are studied. Further, by the ratio of the IPR of the H atom to that of the O atom, we explore the number of involved OH bond per molecule participated in the INMs. Third, by classifying simulated molecules into subensembles according to the geometry of their local environments or their H-bond configurations, we examine the local-structure effects on the bending and stretching INM bands. All of our results are verified to be insensible to the definition of H-bond. Our conclusions about the intermolecular and intramolecular vibrations in water are given.

  3. Using piezo-electric material to simulate a vibration environment

    DOE Patents [OSTI]

    Jepsen, Richard A. (Albuquerque, NM); Davie, Neil T. (Cedar Crest, NM); Vangoethem, Douglas J. (Albuquerque, NM); Romero, Edward F. (Albuquerque, NM)

    2010-12-14T23:59:59.000Z

    A target object can be vibrated using actuation that exploits the piezo-electric ("PE") property. Under combined conditions of vibration and centrifugal acceleration, a centrifugal load of the target object on PE vibration actuators can be reduced by using a counterweight that offsets the centrifugal loading. Target objects are also subjected to combinations of: spin, vibration, and acceleration; spin and vibration; and spin and acceleration.

  4. Design and analysis of active vibration control in a microgravity environment

    E-Print Network [OSTI]

    Atwood, Clay Brian

    1990-01-01T23:59:59.000Z

    DESIGN AND ANALYSIS OF ACTIVE VIBRATION CONTROL IN A MICROGRAVITY ENVIRONMENT A Thesis by CLAY BRIAN ATWOOD Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE May 1990 Major Subject: Mechanical Engineering DESXGN AND ANALYSIS OF ACTIVE VIBRATION CONTROL XN A MXCROGRAVXTY ENVIRONMENT A Thesis by CLAY BRIAN ATWOOD Approved as to style and content by: Richard'Alexander (Chair...

  5. Testing in a combined vibration and acceleration environment.

    SciTech Connect (OSTI)

    Jepsen, Richard Alan; Romero, Edward F.

    2004-10-01T23:59:59.000Z

    Sandia National Laboratories has previously tested a capability to impose a 7.5 g-rms (30 g peak) radial vibration load up to 2 kHz on a 25 lb object with superimposed 50 g acceleration at its centrifuge facility. This was accomplished by attaching a 3,000 lb Unholtz-Dickie mechanical shaker at the end of the centrifuge arm to create a 'Vibrafuge'. However, the combination of non-radial vibration directions, and linear accelerations higher than 50g's are currently not possible because of the load capabilities of the shaker and the stresses on the internal shaker components due to the combined centrifuge acceleration. Therefore, a new technique using amplified piezo-electric actuators has been developed to surpass the limitations of the mechanical shaker system. They are lightweight, modular and would overcome several limitations presented by the current shaker. They are 'scalable', that is, adding more piezo-electric units in parallel or in series can support larger-weight test articles or displacement/frequency regimes. In addition, the units could be mounted on the centrifuge arm in various configurations to provide a variety of input directions. The design along with test results will be presented to demonstrate the capabilities and limitations of the new piezo-electric Vibrafuge.

  6. Vibration Damping Control of Robot Arm Intended for Service Application in Human Environment

    E-Print Network [OSTI]

    Tachi, Susumu

    Vibration Damping Control of Robot Arm Intended for Service Application in Human Environment anthropomorphic robot arm enabling the torque measurement in each joint and tactile area recognition to ensure in heavily loaded joints have risen due to compliances introduced into each joint of the robot arm by means

  7. A forced response analysis and application of impact dampers to rotordynamic vibration suppression in a cryogenic environment

    E-Print Network [OSTI]

    Moore, James Jeffrey

    1993-01-01T23:59:59.000Z

    A FORCED RESPONSE ANALYSIS AND APPLICATION OF IMPACT DAMPERS TO ROTORDYNAMIC VIBRATION SUPPRESSION IN A CRYOGENIC ENVIRONMENT A Thesis by JAMES JEFFREY MOORE Submitted to the Office of Graduate Studies of Texas ARM University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1993 Major Subject: Mechanical Engineering A FORCED RESPONSE ANALYSIS AND APPLICATION OF IMPACT DAMPERS TO ROTORDYNAMIC VIBRATION SUPPRESSION IN A CRYOGENIC ENVIRONMENT A Thesis...

  8. View Maintenance in a Warehousing Environment Yue Zhuge, Hector Garcia-Molina, Joachim Hammer, Jennifer Widom

    E-Print Network [OSTI]

    Hammer, Joachim

    information, avail- able for queries and analysis (e.g., decision support, or data mining) IK93]. As relevantView Maintenance in a Warehousing Environment Yue Zhuge, Hector Garcia-Molina, Joachim Hammer are updated. This view maintenance prob- lem di ers from the traditional one in that the view de nition

  9. Lifecycle Environments: A Retrospective View of the Contributions of Leon J.

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Lifecycle Environments: A Retrospective View of the Contributions of Leon J. Osterweil Lori A@cs.umass.edu Abstract Throughout his career, Leon Osterweil has made significant contribu- tions that have impacted

  10. Long-Range Electronic-to-Vibrational Energy Transfer from Nanocrystals to Their Surrounding Matrix Environment

    E-Print Network [OSTI]

    Rabani, Eran

    for the analysis, control, and optimization of energy storage and disposal in chemistry, physics, material sci radiationless electronic-to-vibrational energy conversion and vibrational energy exchange, which are centralLong-Range Electronic-to-Vibrational Energy Transfer from Nanocrystals to Their Surrounding Matrix

  11. Downhole vibration sensing by vibration energy harvesting

    E-Print Network [OSTI]

    Trimble, A. Zachary

    2007-01-01T23:59:59.000Z

    This thesis outlines the design of a prototype electromagnetic induction vibration energy harvesting device for use in a downhole environment. First order models of the necessary components for a generic vibration energy ...

  12. Rotational-Vibrational Raman Spectroscopy for Measurements of Thermochemistry in Non-isobaric Environments

    E-Print Network [OSTI]

    Bayeh, Alexander C.

    2010-01-14T23:59:59.000Z

    The present work examines line measurements of pressure, temperature, and density in high speed, non-isobaric flows emanating from an underexpanded jet nozzle. Line images of rotational and vibrational Raman spectra are collected for a 8-mm linear...

  13. Vibrational stark effects to identify ion-pairing and determine reduction potentials in electrolyte-free environments

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Mani, Tomoyasu; Grills, David C.; Miller, John R.

    2015-01-28T23:59:59.000Z

    A recently-developed instrument for time-resolved infrared detection following pulse radiolysis has been used to measure the ?(C?N) IR band of the radical anion of a CN-substituted fluorene in tetrahydrofuran. Specific vibrational frequencies can exhibit distinct frequency shifts due to ion-pairing, which can be explained in the framework of the vibrational Stark effect. Measurements of the ratio of free ions and ion-pairs in different electrolyte concentrations allowed us to obtain an association constant and free energy change for ion-pairing. This new method has the potential to probe the geometry of ion-pairing and allows the reduction potentials of molecules to be determinedmore »in the absence of electrolyte in an environment of low dielectric constant.« less

  14. Vibrational stark effects to identify ion-pairing and determine reduction potentials in electrolyte-free environments

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Mani, Tomoyasu [Brookhaven National Lab. (BNL), Upton, NY (United States); Grills, David C. [Brookhaven National Lab. (BNL), Upton, NY (United States); Miller, John R. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2015-01-28T23:59:59.000Z

    A recently-developed instrument for time-resolved infrared detection following pulse radiolysis has been used to measure the ?(C?N) IR band of the radical anion of a CN-substituted fluorene in tetrahydrofuran. Specific vibrational frequencies can exhibit distinct frequency shifts due to ion-pairing, which can be explained in the framework of the vibrational Stark effect. Measurements of the ratio of free ions and ion-pairs in different electrolyte concentrations allowed us to obtain an association constant and free energy change for ion-pairing. This new method has the potential to probe the geometry of ion-pairing and allows the reduction potentials of molecules to be determined in the absence of electrolyte in an environment of low dielectric constant.

  15. The Assistance of Molecular Vibrations on Coherent Energy Transfer in Photosynthesis from the View of Quantum Heat Engine

    E-Print Network [OSTI]

    Zhang, Zhedong

    2015-01-01T23:59:59.000Z

    Recently the quantum nature in the energy transport in solar cell and light-harvesting complexes have attracted much attention, as being triggered by the experimental observations. We model the light-harvesting complex (i.e., PEB50 dimer) as a quantum heat engine (QHE) and study the effect of the undamped intra-molecule vibrational modes on the coherent energy transfer process and quantum transport. We find that the exciton-vibration interaction has non-trivial contribution to the promotion of quantum yield as well as transport properties of the quantum heat engine at steady state, by enhancing the quantum coherence quantified by entanglement entropy. The perfect quantum yield over 90% has been obtained, with theexciton-vibration coupling. We attribute these improvements to the renormalization of the electronic couplings effectively induced by exciton-vibration interaction and the subsequent delocalization of excitons. Finally we demonstrate that the thermal relaxation and dephasing can help the excitation en...

  16. Public views on multiple dimensions of security : nuclear waepons, terrorism, energy, and the environment : 2007.

    SciTech Connect (OSTI)

    Herron, Kerry Gale (University of Oklahoma, Norman, OK); Jenkins-Smith, Hank C. (University of Oklahoma, Norman, OK)

    2008-01-01T23:59:59.000Z

    We analyze and compare findings from identical national surveys of the US general public on nuclear security and terrorism administered by telephone and Internet in mid-2007. Key areas of investigation include assessments of threats to US security; valuations of US nuclear weapons and nuclear deterrence; perspectives on nuclear proliferation, including the specific cases of North Korea and Iran; and support for investments in nuclear weapons capabilities. Our analysis of public views on terrorism include assessments of the current threat, progress in the struggle against terrorism, preferences for responding to terrorist attacks at different levels of assumed casualties, and support for domestic policies intended to reduce the threat of terrorism. Also we report findings from an Internet survey conducted in mid 2007 that investigates public views of US energy security, to include: energy supplies and reliability; energy vulnerabilities and threats, and relationships among security, costs, energy dependence, alternative sources, and research and investment priorities. We analyze public assessments of nuclear energy risks and benefits, nuclear materials management issues, and preferences for the future of nuclear energy in the US. Additionally, we investigate environmental issues as they relate to energy security, to include expected implications of global climate change, and relationships among environmental issues and potential policy options.

  17. Multiple direction vibration fixture

    DOE Patents [OSTI]

    Cericola, Fred (Albuquerque, NM); Doggett, James W. (Albuquerque, NM); Ernest, Terry L. (Albuquerque, NM); Priddy, Tommy G. (Rockville, MD)

    1991-01-01T23:59:59.000Z

    An apparatus for simulating a rocket launch environment on a test item undergoing centrifuge testing by subjecting the item simultaneously or separately to vibration along an axis of centripetal force and along an axis perpendicular to the centripetal force axis. The apparatus includes a shaker motor supported by centrifuge arms and a right angle fixture pivotally connected to one of the shaker motor mounts. When the shaker motor vibrates along the centripetal force axis, the vibrations are imparted to a first side of the right angle fixture. The vibrations are transmitted 90 degrees around the pivot and are directed to a second side of the right angle fixture which imparts vibrations perpendicular to the centripetal force axis. The test item is in contact with a third side of the right angle fixture and receives both centripetal-force-axis vibrations and perpendicular axis vibrations simultaneously. A test item can be attached to the third side near the flexible coupling or near the air bag to obtain vibrations along the centripetal force axis or transverse to the centripetal force axis.

  18. Environment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Environment Environment Our good neighbor pledge: to contribute to quality of life in Northern New Mexico through economic development, excellence in education, and active employee...

  19. Vibrational Coupling

    SciTech Connect (OSTI)

    None

    2011-01-01T23:59:59.000Z

    By homing in on the distribution patterns of electrons around an atom, a team of scientists team with Berkeley Lab's Molecular Foundry showed how certain vibrations from benzene thiol cause electrical charge to "slosh" onto a gold surface (left), while others do not (right). The vibrations that cause this "sloshing" behavior yield a stronger SERS signal.

  20. Non Intrusive Measures for Determining the Minimum Field of View for User Search Task in 3D Virtual Environments

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Non Intrusive Measures for Determining the Minimum Field of View for User Search Task in 3D Virtual on the use of several novel non- intrusive temporal and quantitative measures of visual attention, such as engines. The use of this virtual camera can show interesting results for non-invasive study

  1. Environment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContractElectron-StateEnergyHeavyDepartmentebbaEnvironment Environment A

  2. Vibrational Cooling in A Cold Ion Trap: Vibrationally Resolved...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Vibrational Cooling in A Cold Ion Trap: Vibrationally Resolved Photoelectron Spectroscopy of Cold C60- Anions. Vibrational Cooling in A Cold Ion Trap: Vibrationally Resolved...

  3. Environment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8, 2000ConsumptionInnovation PortalHanford SiteMonitoringEnvironment

  4. Environment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContractElectron-StateEnergyHeavyDepartmentebba SignEconomicEnvironment

  5. System and method of active vibration control for an electro-mechanically cooled device

    DOE Patents [OSTI]

    Lavietes, Anthony D. (Hayward, CA); Mauger, Joseph (Livermore, CA); Anderson, Eric H. (Mountain View, CA)

    2000-01-01T23:59:59.000Z

    A system and method of active vibration control of an electro-mechanically cooled device is disclosed. A cryogenic cooling system is located within an environment. The cooling system is characterized by a vibration transfer function, which requires vibration transfer function coefficients. A vibration controller generates the vibration transfer function coefficients in response to various triggering events. The environments may differ by mounting apparatus, by proximity to vibration generating devices, or by temperature. The triggering event may be powering on the cooling system, reaching an operating temperature, or a reset action. A counterbalance responds to a drive signal generated by the vibration controller, based on the vibration signal and the vibration transfer function, which adjusts vibrations. The method first places a cryogenic cooling system within a first environment and then generates a first set of vibration transfer function coefficients, for a vibration transfer function of the cooling system. Next, the cryogenic cooling system is placed within a second environment and a second set of vibration transfer function coefficients are generated. Then, a counterbalance is driven, based on the vibration transfer function, to reduce vibrations received by a vibration sensitive element.

  6. Tripod vibration anesthesia

    E-Print Network [OSTI]

    Stoecker, William V; Malters, Joseph M; Xu, Jin; Pikka, Jo

    2008-01-01T23:59:59.000Z

    A, Liu JF. Vibration anesthesia: a noninvasive method ofTripod vibration anesthesia William V Stoecker MD 1 , Josephfor cutaneous injection anesthesia. Most pain associated

  7. ALMA view of the circumstellar environment of the post-common-envelope-evolution binary system HD101584

    E-Print Network [OSTI]

    Olofsson, H; Maercker, M; Humphreys, E M L; Lindqvist, M; Nyman, L; Ramstedt, S

    2015-01-01T23:59:59.000Z

    We study the circumstellar evolution of the binary HD101584, consisting of a post-AGB star and a low-mass companion, which is most likely a post-common-envelope-evolution system. We used ALMA observations of the 12CO, 13CO, and C18O J=2-1 lines and the 1.3mm continuum to determine the morphology, kinematics, masses, and energetics of the circumstellar environment. The circumstellar medium has a bipolar hour-glass structure, seen almost pole-on, formed by an energetic jet, about 150 km/s. We conjecture that the circumstellar morphology is related to an event that took place about 500 year ago, possibly a capture event where the companion spiraled in towards the AGB star. However, the kinetic energy of the accelerated gas exceeds the released orbital energy, and, taking into account the expected energy transfer efficiency of the process, the observed phenomenon does not match current common-envelope scenarios. This suggests that another process must augment, or even dominate, the ejection process. A significant...

  8. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM

    SciTech Connect (OSTI)

    Martin E. Cobern

    2004-08-31T23:59:59.000Z

    The deep hard rock drilling environment induces severe vibrations into the drillstring, which can cause reduced rates of penetration (ROP) and premature failure of the equipment. The only current means of controlling vibration under varying conditions is to change either the rotary speed or the weight-on-bit (WOB). These changes often reduce drilling efficiency. Conventional shock subs are useful in some situations, but often exacerbate the problems. The objective of this project is development of a unique system to monitor and control drilling vibrations in a ''smart'' drilling system. This system has two primary elements: (1) The first is an active vibration damper (AVD) to minimize harmful axial, lateral and torsional vibrations. The hardness of this damper will be continuously adjusted using a robust, fast-acting and reliable unique technology. (2) The second is a real-time system to monitor drillstring vibration, and related parameters. This monitor adjusts the damper according to local conditions. In some configurations, it may also send diagnostic information to the surface via real-time telemetry. The AVD is implemented in a configuration using magnetorheological (MR) fluid. By applying a current to the magnetic coils in the damper, the viscosity of the fluid can be changed rapidly, thereby altering the damping coefficient in response to the measured motion of the tool. Phase I of this program entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype. Phase I of the project was completed by the revised end date of May 31, 2004. The objectives of this phase were met, and all prerequisites for Phase II have been completed.

  9. DOWNHOLE VIBRATION MONITORING AND CONTROL SYSTEM

    SciTech Connect (OSTI)

    Martin E. Cobern

    2003-02-01T23:59:59.000Z

    The purpose of this program is to develop the Drilling Vibration Monitoring & Control System (DVMCS) to both record and reduce drilling vibrations in a ''smart'' drill string. It is composed of two main elements. The first is a multi-axis active vibration damper to minimize harmful axial, lateral and torsional vibrations, and thereby increase both rate of penetration (ROP) and bit life, as well that the life of other drillstring components. The hydraulic impedance (hardness) of this damper will be continuously adjusted using unique technology that is robust, fast-acting and reliable. The second component is a real-time system to monitor 3-axis drillstring vibration, and related parameters including weight- and torque-on-bit (TOB) and temperature. This monitor will determine the current vibration environment and adjust the damper accordingly. In some configurations, it may also send diagnostic information to the surface via real-time telemetry. Phase I of this program addresses an evaluation of the environment in which the DVMCS will operate; modeling of a drillstring response including the active damper; a top-level design of the mechanical and electronic systems; analyzing the anticipated performance of the damper by modeling and laboratory testing of small prototypes; and doing preliminary economic, market, environmental and financing analyses. This phase is scheduled to last fourteen months, until November 30, 2003. During this first quarter, significant progress was achieved on the first two objectives, and work was begun on several others. Initial designs of the DVMCS are underway.

  10. Drag amplification and fatigue damage in vortex-induced vibrations

    E-Print Network [OSTI]

    Jhingran, Vikas Gopal

    2008-01-01T23:59:59.000Z

    Fatigue damage and drag force amplification due to Vortex-Induced-Vibrations (VIV) continue to cause significant problems in the design of structures which operate in ocean current environments. These problems are magnified ...

  11. The nature of the exalted Kekule vibration of styrene and other benzene derivatives in the S1 state

    E-Print Network [OSTI]

    Haas, Yehuda

    The nature of the exalted Kekule vibration of styrene and other benzene derivatives in the S1 state vibrational frequency of several benzene derivatives in the ®rst excited state S1. It is found of benzene are treated as `twin states'. The physical nature of this vibration is discussed in view

  12. Vibrational Spectroscopy of Chromatographic Interfaces

    SciTech Connect (OSTI)

    Jeanne E. Pemberton

    2011-03-10T23:59:59.000Z

    Chromatographic separations play a central role in DOE-supported fundamental research related to energy, biological systems, the environment, and nuclear science. The overall portfolio of research activities in the Separations and Analysis Program within the DOE Office of Basic Energy Sciences includes support for activities designed to develop a molecular-level understanding of the chemical processes that underlie separations for both large-scale and analytical-scale purposes. The research effort funded by this grant award was a continuation of DOE-supported research to develop vibrational spectroscopic methods to characterize the interfacial details of separations processes at a molecular level.

  13. Active vibration control in a microgravity environment

    E-Print Network [OSTI]

    Park, Myoung Soo

    1987-01-01T23:59:59.000Z

    . 4046 K Because Uf is proportional to ?, , x term in above equation cancels out. Therei'ore Jf has a constant value under the assumption of a constant air jet pressure. From equation (38), 1 Jf = Jf = ? wD pUp 0 4 (42) In order to use equation (42.... 6 (Andersen, 1967), the final velocity is found (Figure 13), (APPENDIX B). 1 2k Pi Us = I( )[I ? ( ? ) )( ? )I k ? 1 P, pi (43) Now using'equations (42) and (43), calculated thrust force produced by jet. As 1 Jf = ? ?wD pUs As 4 (44) 28...

  14. 2011 Vibrations -1 VIBRATION OF PLATES & BARS

    E-Print Network [OSTI]

    Glashausser, Charles

    of plates of different shapes using Chladni patterns. APPARATUS: Function generator in FFTSCOPE, long and short flat bars, Chladni plates, salt, salt trays INTRODUCTION he equations of vibrational motion. The solutions become very complicated for the free boundary condition at the perimeter of the plate. The Chladni

  15. NIF Ambient Vibration Measurements

    SciTech Connect (OSTI)

    Noble, C.R.; Hoehler, M.S., S.C. Sommer

    1999-11-29T23:59:59.000Z

    LLNL has an ongoing research and development project that includes developing data acquisition systems with remote wireless communication for monitoring the vibrations of large civil engineering structures. In order to establish the capability of performing remote sensing over an extended period of time, the researchers needed to apply this technology to a real structure. The construction of the National Ignition Facility provided an opportunity to test the data acquisition system on a large structure to monitor whether the facility is remaining within the strict ambient vibration guidelines. This document will briefly discuss the NIF ambient vibration requirements and summarize the vibration measurements performed during the Spring and Summer of 1999. In addition, a brief description of the sensors and the data acquisition systems will be provided in Appendix B.

  16. Fiber optic vibration sensor

    DOE Patents [OSTI]

    Dooley, Joseph B. (Harriman, TN); Muhs, Jeffrey D. (Lenoir City, TN); Tobin, Kenneth W. (Harriman, TN)

    1995-01-01T23:59:59.000Z

    A fiber optic vibration sensor utilizes two single mode optical fibers supported by a housing with one optical fiber fixedly secured to the housing and providing a reference signal and the other optical fiber having a free span length subject to vibrational displacement thereof with respect to the housing and the first optical fiber for providing a signal indicative of a measurement of any perturbation of the sensor. Damping or tailoring of the sensor to be responsive to selected levels of perturbation is provided by altering the diameter of optical fibers or by immersing at least a portion of the free span length of the vibration sensing optical fiber into a liquid of a selected viscosity.

  17. Fiber optic vibration sensor

    DOE Patents [OSTI]

    Dooley, J.B.; Muhs, J.D.; Tobin, K.W.

    1995-01-10T23:59:59.000Z

    A fiber optic vibration sensor utilizes two single mode optical fibers supported by a housing with one optical fiber fixedly secured to the housing and providing a reference signal and the other optical fiber having a free span length subject to vibrational displacement thereof with respect to the housing and the first optical fiber for providing a signal indicative of a measurement of any perturbation of the sensor. Damping or tailoring of the sensor to be responsive to selected levels of perturbation is provided by altering the diameter of optical fibers or by immersing at least a portion of the free span length of the vibration sensing optical fiber into a liquid of a selected viscosity. 2 figures.

  18. Externally tuned vibration absorber

    DOE Patents [OSTI]

    Vincent, Ronald J. (Latham, NY)

    1987-09-22T23:59:59.000Z

    A vibration absorber unit or units are mounted on the exterior housing of a hydraulic drive system of the type that is powered from a pressure wave generated, e.g., by a Stirling engine. The hydraulic drive system employs a piston which is hydraulically driven to oscillate in a direction perpendicular to the axis of the hydraulic drive system. The vibration absorbers each include a spring or other resilient member having one side affixed to the housing and another side to which an absorber mass is affixed. In a preferred embodiment, a pair of vibration absorbers is employed, each absorber being formed of a pair of leaf spring assemblies, between which the absorber mass is suspended.

  19. Journal of Sound and Vibration ] (

    E-Print Network [OSTI]

    Ge, Shuzhi Sam

    the ocean surface to the sea floor. With the trend towards oil and gas exploration in deeper watersJOURNAL OF SOUND AND VIBRATION Journal of Sound and Vibration ] (

  20. Nonlinear vibrational microscopy

    DOE Patents [OSTI]

    Holtom, Gary R. (Richland, WA); Xie, Xiaoliang Sunney (Richland, WA); Zumbusch, Andreas (Munchen, DE)

    2000-01-01T23:59:59.000Z

    The present invention is a method and apparatus for microscopic vibrational imaging using coherent Anti-Stokes Raman Scattering or Sum Frequency Generation. Microscopic imaging with a vibrational spectroscopic contrast is achieved by generating signals in a nonlinear optical process and spatially resolved detection of the signals. The spatial resolution is attained by minimizing the spot size of the optical interrogation beams on the sample. Minimizing the spot size relies upon a. directing at least two substantially co-axial laser beams (interrogation beams) through a microscope objective providing a focal spot on the sample; b. collecting a signal beam together with a residual beam from the at least two co-axial laser beams after passing through the sample; c. removing the residual beam; and d. detecting the signal beam thereby creating said pixel. The method has significantly higher spatial resolution then IR microscopy and higher sensitivity than spontaneous Raman microscopy with much lower average excitation powers. CARS and SFG microscopy does not rely on the presence of fluorophores, but retains the resolution and three-dimensional sectioning capability of confocal and two-photon fluorescence microscopy. Complementary to these techniques, CARS and SFG microscopy provides a contrast mechanism based on vibrational spectroscopy. This vibrational contrast mechanism, combined with an unprecedented high sensitivity at a tolerable laser power level, provides a new approach for microscopic investigations of chemical and biological samples.

  1. Vibration sensing method and apparatus

    DOE Patents [OSTI]

    Barna, B.A.

    1989-04-25T23:59:59.000Z

    A method and apparatus for nondestructive evaluation of a structure are disclosed. Resonant audio frequency vibrations are excited in the structure to be evaluated and the vibrations are measured and characterized to obtain information about the structure. The vibrations are measured and characterized by reflecting a laser beam from the vibrating structure and directing a substantial portion of the reflected beam back into the laser device used to produce the beam which device is capable of producing an electric signal containing information about the vibration. 4 figs.

  2. Localized Surface Plasmons in Vibrating Graphene Nanodisks

    E-Print Network [OSTI]

    Wang, Weihua; Mortensen, N Asger; Christensen, Johan

    2015-01-01T23:59:59.000Z

    Localized surface plasmons are confined collective oscillations of electrons in metallic nanoparticles. When driven by light, the optical response is dictated by geometrical parameters and the dielectric environment and plasmons are therefore extremely important for sensing applications. Plasmons in graphene disks have the additional benefit to be highly tunable via electrical stimulation. Mechanical vibrations create structural deformations in ways where the excitation of localized surface plasmons can be strongly modulated. We show that the spectral shift in such a scenario is determined by a complex interplay between the symmetry and shape of the modal vibrations and the plasmonic mode pattern. Tuning confined modes of light in graphene via acoustic excitations, paves new avenues in shaping the sensitivity of plasmonic detectors, and in the enhancement of the interaction with optical emitters, such as molecules, for future nanophotonic devices.

  3. Vibration damping method and apparatus

    DOE Patents [OSTI]

    Redmond, J.M.; Barney, P.S.; Parker, G.G.; Smith, D.A.

    1999-06-22T23:59:59.000Z

    The present invention provides vibration damping method and apparatus that can damp vibration in more than one direction without requiring disassembly, that can accommodate varying tool dimensions without requiring re-tuning, and that does not interfere with tool tip operations and cooling. The present invention provides active dampening by generating bending moments internal to a structure such as a boring bar to dampen vibration thereof. 38 figs.

  4. Turbine blade vibration dampening

    DOE Patents [OSTI]

    Cornelius, Charles C. (San Diego, CA); Pytanowski, Gregory P. (San Diego, CA); Vendituoli, Jonathan S. (San Diego, CA)

    1997-07-08T23:59:59.000Z

    The present turbine wheel assembly increases component life and turbine engine longevity. The combination of the strap and the opening combined with the preestablished area of the outer surface of the opening and the preestablished area of the outer circumferential surface of the strap and the friction between the strap and the opening increases the life and longevity of the turbine wheel assembly. Furthermore, the mass "M" or combined mass "CM" of the strap or straps and the centrifugal force assist in controlling vibrations and damping characteristics.

  5. Turbine blade vibration dampening

    DOE Patents [OSTI]

    Cornelius, C.C.; Pytanowski, G.P.; Vendituoli, J.S.

    1997-07-08T23:59:59.000Z

    The present turbine wheel assembly increases component life and turbine engine longevity. The combination of the strap and the opening combined with the preestablished area of the outer surface of the opening and the preestablished area of the outer circumferential surface of the strap and the friction between the strap and the opening increases the life and longevity of the turbine wheel assembly. Furthermore, the mass ``M`` or combined mass ``CM`` of the strap or straps and the centrifugal force assist in controlling vibrations and damping characteristics. 5 figs.

  6. The vibrational Raman spectrum of CS?

    E-Print Network [OSTI]

    Ballard, Harold Noble

    1950-01-01T23:59:59.000Z

    THE VIBRATIONAL RAMAN SPECTRUM OF CSp A Thesis By HAROLD NOBLE BALLARD Approved as to style and content by Chairman o| Committee THE VIBRATIONAL RAMAN SPECTRUM OF CS2 HAROLD NOBLE BALLARD A Thesis Suhmitted to the Graduate School... in the procurement of necessary equipment. SECTION I: INTRODUCTION. SECTION II: CLASSICAL THEORY OF RAHAM SCATTERING . SECTION III: THEORY OF NORMAL VIBRATIONS AND VIBRATIONAL WAVE EQUATIONS. A, Morsel Vibrations B. Vibrational Wave Eqnation and lhergy Levels...

  7. Forests and historic environment

    E-Print Network [OSTI]

    Forests and historic environment UK Forestry Standard Guidelines #12;Key to symbols UKFS Reference number #12;Forests and historic environment Forestry Commission: Edinburgh UK Forestry Standard in any format or medium, under the terms of the Open Government Licence. To view this licence, visit: www

  8. Sum Frequency Generation for Surface Vibrational Spectroscopy...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sum Frequency Generation for Surface Vibrational Spectroscopy Sum Frequency Generation for Surface Vibrational Spectroscopy This customized SFG-VS spectrometer incorporates unique...

  9. Vibration dampener for dampening vibration of a tubular member

    DOE Patents [OSTI]

    Obermeyer, F.D.; Middlebrooks, W.B.; DeMario, E.E.

    1994-10-18T23:59:59.000Z

    Vibration dampener for dampening vibration of a tubular member, such as an instrumentation tube of the type found in nuclear reactor pressure vessels is disclosed. The instrumentation tube is received in an outer tubular member, such as a guide thimble tube. The vibration dampener comprises an annular sleeve which is attachable to the inside surface of the guide thimble tube and which is sized to surround the instrumentation tube. Dimples are attached to the interior wall of the sleeve for radially supporting the instrumentation tube. The wall of the sleeve has a flexible spring member, which is formed from the wall, disposed opposite the dimples for biasing the instrumentation tube into abutment with the dimples. Flow-induced vibration of the instrumentation tube will cause it to move out of contact with the dimples and further engage the spring member, which will flex a predetermined amount and exert a reactive force against the instrumentation tube to restrain its movement. The amount by which the spring member will flex is less than the unrestrained amplitude of vibration of the instrumentation tube. The reactive force exerted against the instrumentation tube will be sufficient to return it to its original axial position within the thimble tube. In this manner, vibration of the instrumentation tube is dampened so that in-core physics measurements are accurate and so that the instrumentation tube will not wear against the inside surface of the guide thimble tube. 14 figs.

  10. Quantum correlation dynamics in photosynthetic processes assisted by molecular vibrations

    E-Print Network [OSTI]

    G. L. Giorgi; M. Roncaglia; F. A. Raffa; M. Genovese

    2015-01-30T23:59:59.000Z

    During the long course of evolution, nature has learnt how to exploit quantum effects. In fact, recent experiments reveal the existence of quantum processes whose coherence extends over unexpectedly long time and space ranges. In particular, photosynthetic processes in light-harvesting complexes display a typical oscillatory dynamics ascribed to quantum coherence. Here, we consider the simple model where a dimer made of two chromophores is strongly coupled with a quasi-resonant vibrational mode. We observe the occurrence of wide oscillations of genuine quantum correlations, between electronic excitations and the environment, represented by vibrational bosonic modes. Such a quantum dynamics has been unveiled through the calculation of the negativity of entanglement and the discord, indicators widely used in quantum information for quantifying the resources needed to realize quantum technologies. We also discuss the possibility of approximating additional weakly-coupled off-resonant vibrational modes, simulating the disturbances induced by the rest of the environment, by a single vibrational mode. Within this approximation, one can show that the off-resonant bath behaves like a classical source of noise.

  11. Distributed optical fiber vibration sensing 

    E-Print Network [OSTI]

    Yu, Hui

    2001-01-01T23:59:59.000Z

    This thesis presents a distributed optical fiber vibration sensor. The purpose of this sensing system is to monitor, in real time, the status of railcars by burying an optical fiber underground beside the rails. Using a coherent homodyne technique...

  12. Vibrations of circular steel plates with damping

    E-Print Network [OSTI]

    Sheth, Prafulchandra Naginlal

    1967-01-01T23:59:59.000Z

    distributed. Usually, the prime objection to vibrations produced by machines is their effect on humans. These are high frequency vibrations that produce troublesome noise. Low frequency vibrations are often trans- mitted and these may damage nearby... materials used with fans, motors, engines, presses, turbines and similar machines. Byars (1)* studied vibrations of a circular plate on three supports for node patterns, amplitudes and frequencies. Ballentine (2) investigated the vibrations of circular...

  13. Experimental Studies on Dynamic Vibration Absorber using Shape Memory Alloy (NiTi) Springs

    SciTech Connect (OSTI)

    Kumar, V. Raj; Kumar, M. B. Bharathi Raj; Kumar, M. Senthil [Department of Mechanical Engineering, PSG College of Technology, Coimbatore (India)

    2011-10-20T23:59:59.000Z

    Shape memory alloy (SMA) springs have been used as actuators in many applications although their use in the vibration control area is very recent. Since shape memory alloys differ from conventional alloy materials in many ways, the traditional design approach for springs is not completely suitable for designing SMA springs. Some vibration control concepts utilizing unique characteristics of SMA's will be presented in this paper.A dynamic vibration absorber (DVA) using shape memory alloy (SMA) actuator is developed for attenuation of vibration in a cantilever beam. The design procedure of the DVA is presented. The system consists of a cantilever beam which is considered to generate the real-time vibration using shaker. A SMA spring is used with a mass attached to its end. The stiffness of the SMA spring is dynamically varied in such a way to attenuate the vibration. Both simulation and experimentation are carried out using PID controller. The experiments were carried out by interfacing the experimental setup with a computer using LabVIEW software, Data acquisition and control are implemented using a PCI data acquisition card. Standard PID controllers have been used to control the vibration of the beam. Experimental results are used to demonstrate the effectiveness of the controllers designed and the usefulness of the proposed test platform by exciting the structure at resonance. In experimental setup, an accelerometer is used to measure the vibration which is fed to computer and correspondingly the SMA spring is actuated to change its stiffness to control the vibration. The results obtained illustrate that the developed DVA using SMA actuator is very effective in reducing structural response and have great potential to be an active vibration control medium.

  14. Prarie View RDF

    Energy Savers [EERE]

    PRAIRIE VIEW RDF 2 Prairie View RDF Located at JAAP (approx. 40 miles southwest of Chicago), 223 acres on 455 Acre Parcel Will County Owner; Waste Management, Operator ...

  15. ACTIVE VIBRATION CONTROL OF A DOUBLY-CURVED PANEL UNDER PRESSURISATION

    E-Print Network [OSTI]

    Sóbester, András

    in the aircraft, naval and automotive industries. From a structural dynamics point of view, shells tend of the cabin for the vibrations generated by the engine, turbulent airflow and/or road-tyre interactions. With the rising demand for quieter, lighter and more fuel efficient vehicles, active structural control may

  16. Visualization of vibration experienced in offshore platforms

    E-Print Network [OSTI]

    Patrikalakis, Alexander Marinos Charles

    2010-01-01T23:59:59.000Z

    In this thesis, I design and evaluate methods to optimize the visualization of vortex-induced vibration (VIV) in marine risers. VIV is vibration experienced by marine risers in offshore drilling platforms due to ocean ...

  17. Method for enriching a middle isotope using vibration-vibration pumping

    DOE Patents [OSTI]

    Rich, Joseph W. (East Aurora, NY); Homicz, Gregory F. (Getzville, NY); Bergman, Richard C. (Corfu, NY)

    1989-01-01T23:59:59.000Z

    Method for producing isotopically enriched material by vibration-vibration excitation of gaseous molecules wherein a middle mass isotope of an isotopic mixture including lighter and heavier mass isotopes preferentially populates a higher vibrational mode and chemically reacts to provide a product in which it is enriched. The method can be used for vibration-vibration enrichment of .sup.17 O in a CO reactant mixture.

  18. Distributed optical fiber vibration sensing

    E-Print Network [OSTI]

    Yu, Hui

    2001-01-01T23:59:59.000Z

    , the system measures Rayleigh scattering whose phase is modulated by vibrations. In order to obtain a large sensing area, an external cavity ring laser is used as the light source for a high degree of coherence. The linewidth of this laser light can...

  19. Redistribution of vibrational population in a molecular ion with nonresonant strong-field laser pulses

    SciTech Connect (OSTI)

    Bryan, W. A.; Nemeth, G. R. A. J. [Department of Physics, Swansea University, Singleton Park, Swansea SA2 8PP (United Kingdom); STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX (United Kingdom); Calvert, C. R.; King, R. B.; Alexander, J. D.; Greenwood, J. B.; Williams, I. D. [School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN (United Kingdom); Froud, C. A.; Turcu, I. C. E.; Springate, E. [STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX (United Kingdom); Newell, W. R. [Department of Physics and Astronomy, University College London, London WC1E 6BT (United Kingdom)

    2011-02-15T23:59:59.000Z

    We present an experimental demonstration of nonresonant manipulation of vibrational states in a molecule by an intense ultrashort laser pulse. A vibrational wave packet is generated in D{sub 2}{sup +} through tunnel ionization of D{sub 2} by a few-cycle pump pulse. A similar control pulse is applied as the wave packet begins to dephase so that the dynamic Stark effect distorts the electronic environment of the nuclei, transferring vibrational population. The time evolution of the modified wave packet is probed via the D{sub 2}{sup +} photodissociation yield that results from the application of an intense probe pulse. Comparing the measured yield with a quasiclassical trajectory model allows us to determine the redistribution of vibrational population caused by the control pulse.

  20. Reduced-vibration tube array

    DOE Patents [OSTI]

    Bruck, Gerald J.; Bartolomeo, Daniel R.

    2004-07-20T23:59:59.000Z

    A reduced-vibration tube array is disclosed. The array includes a plurality of tubes in a fixed arrangement and a plurality of damping members positioned within the tubes. The damping members include contoured interface regions characterized by bracing points that selectively contact the inner surface of an associated tube. Each interface region is sized and shaped in accordance with the associated tube, so that the damping member bracing points are spaced apart a vibration-reducing distance from the associated tube inner surfaces at equilibrium. During operation, mechanical interaction between the bracing points and the tube inner surfaces reduces vibration by a damage-reducing degree. In one embodiment, the interface regions are serpentine shaped. In another embodiment, the interface regions are helical in shape. The interface regions may be simultaneously helical and serpentine in shape. The damping members may be fixed within the associated tubes, and damping member may be customized several interference regions having attributes chosen in accordance with desired flow characteristics and associated tube properties.

  1. Structure and vibrational spectra of H ,,H2O...8: Is the excess proton

    E-Print Network [OSTI]

    Ciobanu, Cristian

    Structure and vibrational spectra of H¿ ,,H2O...8: Is the excess proton in a symmetrical hydrogen environment of the excess proton sometimes resembles a symmetric H5O2 structure and sometimes H3O , but many to which the excess proton resembles H5O2 or H3O . Other bond lengths and, perhaps most useful

  2. Non-Invasive Interactive Visualization of Dynamic Architectural Environments

    E-Print Network [OSTI]

    Stanford University

    Non-Invasive Interactive Visualization of Dynamic Architectural Environments Christopher Niederauer exploded views of 3D architectural environments such as multi-story buildings. These exploded views allow viewers to simultaneously see the internal and external structures of such environments. To create

  3. Actively controlled vibration welding system and method

    DOE Patents [OSTI]

    Cai, Wayne W.; Kang, Bongsu; Tan, Chin-An

    2013-04-02T23:59:59.000Z

    A vibration welding system includes a controller, welding horn, an active material element, and anvil assembly. The assembly may include an anvil body connected to a back plate and support member. The element, e.g., a piezoelectric stack or shape memory alloy, is positioned with respect to the assembly. The horn vibrates in a desirable first direction to form a weld on a work piece. The element controls any vibrations in a second direction by applying calibrated response to the anvil body in the second direction. A method for controlling undesirable vibrations in the system includes positioning the element with respect to the anvil assembly, connecting the anvil body to the support member through the back plate, vibrating the horn in a desirable first direction, and transmitting an input signal to the element to control vibration in an undesirable second direction.

  4. High force vibration testing with wide frequency range

    DOE Patents [OSTI]

    Romero, Edward F.; Jepsen, Richard A.; Gregory, Danny Lynn

    2013-04-02T23:59:59.000Z

    A shaker assembly for vibration testing includes first and second shakers, where the first shaker includes a piezo-electric material for generating vibration. A support structure permits a test object to be supported for vibration of the test object by both shakers. An input permits an external vibration controller to control vibration of the shakers.

  5. Plan-view Trajectory Estimation with Dense Stereo Background Models

    E-Print Network [OSTI]

    Darrell, T.

    2001-02-01T23:59:59.000Z

    In a known environment, objects may be tracked in multiple views using a set of back-ground models. Stereo-based models can be illumination-invariant, but often have undefined values which inevitably lead to foreground ...

  6. World Views From fragmentation

    E-Print Network [OSTI]

    .......................................................11 2. The Seven Components of a World View...................................................... 20 3. The Unity of the Seven Sub........................................... 25 5. The Purpose of the group `Worldviews

  7. LDTA'02 Preliminary Version The ELAN Environment

    E-Print Network [OSTI]

    Moreau, Pierre-Etienne

    LDTA'02 Preliminary Version The ELAN Environment: a Rewriting Logic Environment based on ASF+SDF for the design and implementation of a new ELAN environment. The idea was to use the ASF+SDF parsing technology are not viewed as part of the ELAN syntax [6]. ASF+SDF technology The technology applied in the ASF+SDF Meta

  8. Peri-prosthetic fracture vibration testing

    SciTech Connect (OSTI)

    Cruce, Jesse R [Los Alamos National Laboratory; Erwin, Jenny R [Los Alamos National Laboratory; Remick, Kevin R [Los Alamos National Laboratory; Cornwell, Phillip J [Los Alamos National Laboratory; Menegini, R. Michael [INDIANA UNIV.; Racanelli, Joe [STRYKER ORTHOPARDICS

    2010-11-08T23:59:59.000Z

    The purpose of this study was to establish a test setup and vibration analysis method to predict femoral stem seating and prevent bone fracture using accelerometer and force response data from an instrumented stem and impactor. This study builds upon earlier studies to identify a means to supplement a surgeon's tactile and auditory senses by using damage identification techniques normally used for civil and mechanical structures. Testing was conducted using foam cortical shell sawbones prepared for stems of different geometries. Each stem was instrumented with an accelerometer. Two impactor designs were compared: a monolithic impactor and a two-piece impactor, each with an integrated load cell and accelerometer. Acceleration and force measurements were taken in the direction of impaction. Comparisons between different methods of applying an impacting force were made, including a drop tower and a surgical hammer. The effect of varying compliance on the data was also investigated. The ultimate goal of this study was to assist in the design of an integrated portable data acquisition system capable of being used in future cadaveric testing. This paper will discuss the experimental setup and the subsequent results of the comparisons made between impactors, prosthetic geometries, compliances, and impact methods. The results of this study can be used for both future replicate testing as well as in a cadaveric environment.

  9. Roland Kruse, Tiedo Meyer: Vibration platform for the calibration of

    E-Print Network [OSTI]

    Vormann, Matthias

    Roland Kruse, Tiedo Meyer: Vibration platform for the calibration of optical sensors #12;Roland Kruse, Tiedo Meyer (Oldenburg University): Vibration platform for the calibration of optical sensors Meyer (Oldenburg University): Vibration platform for the calibration of optical sensors The project

  10. NEWS & VIEWS Glass dynamics

    E-Print Network [OSTI]

    Weeks, Eric R.

    NEWS & VIEWS Glass dynamics Diverging views on glass transition Gregory B. mc.mckenna@ttu.edu T he glass transition is one of the most intriguing phenomena in the world of soft condensed matter. Despite decades of study, many aspects of the behaviour of glass-forming liquids remain elusive

  11. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM

    SciTech Connect (OSTI)

    Martin E. Cobern

    2005-07-27T23:59:59.000Z

    The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II are: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in drilling laboratories and test wells. Work during this quarter centered on the rebuilding of the prototype using the improved valve design described in the last report. Most of the components have been received and assembly has begun. Testing is expected to resume in August. In April, a paper was presented at the American Association of Drilling Engineers National Technical Conference in Houston. The paper was well received, and several oilfield service and supply companies sent inquiries regarding commercial distribution of the system. These are currently being pursued, but none have yet been finalized.

  12. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM

    SciTech Connect (OSTI)

    Martin E. Cobern

    2006-09-30T23:59:59.000Z

    The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II were: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in drilling laboratories and test wells. Phase II concluded on January 31, 2006, and the final report was issued. Work on Phase III of the project began during the previous quarter. Efforts this quarter have focused on the manufacture of the prototype and precommercial parts, field test planning and commercialization. The current extreme lead times quoted by oilfield machine shops for collar components, will delay the deployment of the field prototypes. The delivery date for five critical parts from one supplier has slipped to late November, which will preclude deployment for a field test before late December or early January. We are exploring whether we can take the partially made parts and complete them earlier in our own shop.

  13. TIME-RESOLVED VIBRATIONAL SPECTROSCOPY

    SciTech Connect (OSTI)

    Andrei Tokmakoff, MIT (Conference Chair) [Conference Chair; Paul Champion, Northeastern University; Edwin J. Heilweil, NIST; Keith A. Nelson, MIT; Larry Ziegler, Boston University

    2009-05-14T23:59:59.000Z

    This document contains the Proceedings from the 14th International Conference on Time-Resolved Vibrational Spectroscopy, which was held in Meredith, NH from May 9-14, 2009. The study of molecular dynamics in chemical reaction and biological processes using time-resolved spectroscopy plays an important role in our understanding of energy conversion, storage, and utilization problems. Fundamental studies of chemical reactivity, molecular rearrangements, and charge transport are broadly supported by the DOE�s Office of Science because of their role in the development of alternative energy sources, the understanding of biological energy conversion processes, the efficient utilization of existing energy resources, and the mitigation of reactive intermediates in radiation chemistry. In addition, time-resolved spectroscopy is central to all five of DOE�s grand challenges for fundamental energy science. The Time-Resolved Vibrational Spectroscopy conference is organized biennially to bring the leaders in this field from around the globe together with young scientists to discuss the most recent scientific and technological advances. The latest technology in ultrafast infrared, Raman, and terahertz spectroscopy and the scientific advances that these methods enable were covered. Particular emphasis was placed on new experimental methods used to probe molecular dynamics in liquids, solids, interfaces, nanostructured materials, and biomolecules.

  14. RESEARCH LETTERS Vibrating insoles and balance

    E-Print Network [OSTI]

    Collins, James J.

    , and such changes have been associated with diminished motor performance. Input noise can enhance sensory and motor be substantially reduced through the application of mechanical noise to the feet via vibrating insoles. We usedRESEARCH LETTERS Vibrating insoles and balance control in elderly people Attila A Priplata, James B

  15. Coherent Vibrational Dynamics and High-Resolution Nonlinear Spectrosco...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Vibrational Dynamics and High-Resolution Nonlinear Spectroscopy: A Comparison with the AirDMSO Liquid Interface. Coherent Vibrational Dynamics and High-Resolution Nonlinear...

  16. active dynamic vibration: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Topic Index 1 Active Vibration Control on A 3-DOF Parallel Platform Based on Kane's Dynamics Method Engineering Websites Summary: - 2783 - Active Vibration Control on A 3-DOF...

  17. Capturing inhomogeneous broadening of the -CN stretch vibration...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    by mapping the decay of the vibrational polarization using ultrafast lasers, due to the lack of SFG vibrational spectra with high enough spectral resolution and accurate enough...

  18. Application of Random Vibration Theory Methodology for Seismic...

    Office of Environmental Management (EM)

    Application of Random Vibration Theory Methodology for Seismic Soil-Structure Interaction Analysis Application of Random Vibration Theory Methodology for Seismic Soil-Structure...

  19. Passively damped vibration welding system and method

    DOE Patents [OSTI]

    Tan, Chin-An; Kang, Bongsu; Cai, Wayne W.; Wu, Tao

    2013-04-02T23:59:59.000Z

    A vibration welding system includes a controller, welding horn, an anvil, and a passive damping mechanism (PDM). The controller generates an input signal having a calibrated frequency. The horn vibrates in a desirable first direction at the calibrated frequency in response to the input signal to form a weld in a work piece. The PDM is positioned with respect to the system, and substantially damps or attenuates vibration in an undesirable second direction. A method includes connecting the PDM having calibrated properties and a natural frequency to an anvil of an ultrasonic welding system. Then, an input signal is generated using a weld controller. The method includes vibrating a welding horn in a desirable direction in response to the input signal, and passively damping vibration in an undesirable direction using the PDM.

  20. Peace Corps / Environment Environment Volunteers

    E-Print Network [OSTI]

    Kaminsky, Werner

    Peace Corps / Environment Environment Volunteers Environmental damage can have enormous choices about how to best protect and preserve the local environment. Programs and Sample Projects and communications technology, agriculture, and environment. We are looking for applicants with a variety of skills

  1. Energy scavenging from environmental vibration.

    SciTech Connect (OSTI)

    Galchev, Tzeno (University of Michigan); Apblett, Christopher Alan; Najafi, Khalil (University of Michigan)

    2009-10-01T23:59:59.000Z

    The goal of this project is to develop an efficient energy scavenger for converting ambient low-frequency vibrations into electrical power. In order to achieve this a novel inertial micro power generator architecture has been developed that utilizes the bi-stable motion of a mechanical mass to convert a broad range of low-frequency (< 30Hz), and large-deflection (>250 {micro}m) ambient vibrations into high-frequency electrical output energy. The generator incorporates a bi-stable mechanical structure to initiate high-frequency mechanical oscillations in an electromagnetic scavenger. This frequency up-conversion technique enhances the electromechanical coupling and increases the generated power. This architecture is called the Parametric Frequency Increased Generator (PFIG). Three generations of the device have been fabricated. It was first demonstrated using a larger bench-top prototype that had a functional volume of 3.7cm3. It generated a peak power of 558{micro}W and an average power of 39.5{micro}W at an input acceleration of 1g applied at 10 Hz. The performance of this device has still not been matched by any other reported work. It yielded the best power density and efficiency for any scavenger operating from low-frequency (<10Hz) vibrations. A second-generation device was then fabricated. It generated a peak power of 288{micro}W and an average power of 5.8{micro}W from an input acceleration of 9.8m/s{sup 2} at 10Hz. The device operates over a frequency range of 20Hz. The internal volume of the generator is 2.1cm{sup 3} (3.7cm{sup 3} including casing), half of a standard AA battery. Lastly, a piezoelectric version of the PFIG is currently being developed. This device clearly demonstrates one of the key features of the PFIG architecture, namely that it is suitable for MEMS integration, more so than resonant generators, by incorporating a brittle bulk piezoelectric ceramic. This is the first micro-scale piezoelectric generator capable of <10Hz operation. The fabricated device currently generates a peak power of 25.9{micro}W and an average power of 1.21{micro}W from an input acceleration of 9.8m/s{sup -} at 10Hz. The device operates over a frequency range of 23Hz. The internal volume of the generator is 1.2cm{sup 3}.

  2. Sustainable and equitable urban environments in Asia

    E-Print Network [OSTI]

    Badshah, Akhtar

    1993-01-01T23:59:59.000Z

    This study identifies some of the factors and conditions that can encourage the development of sustainable and equitable urban environments. It argues that cities will continue to grow and that it is not productive to view ...

  3. NEWS AND VIEWS PERSPECTIVE

    E-Print Network [OSTI]

    Mahler, D. Luke

    NEWS AND VIEWS PERSPECTIVE Niche diversification follows key innovation in Antarctic fish radiation Oxford Street, Cambridge MA 02138, USA Antarctic notothenioid fishes provide a fascinating evolu- tionary diversification has occurred repeatedly and in parallel. Keywords: community ecology, fish, macroevolution, phylo

  4. Forward viewing OCT endomicroscopy

    E-Print Network [OSTI]

    Liang, Kaicheng

    2014-01-01T23:59:59.000Z

    A forward viewing fiber optic-based imaging probe device was designed and constructed for use with ultrahigh speed optical coherence tomography in the human gastrointestinal tract. The light source was a MEMS-VCSEL at 1300 ...

  5. Vibrations in elemental amorphous semiconductors

    E-Print Network [OSTI]

    Meek, Peter Ernest

    1977-06-17T23:59:59.000Z

    ~lationG 0re pl'c.3cnted for four-fold coordinated contirluou:, random net',/orK (CR~'i J mocels of a-Ge I for a three-fold c08rdinated CRN n10dol of a-As and fOe isolated- and interacting-chain models of a-Se. In order to obtain a more realistic descripti... are summarised in the final part of this cha pter and n plan of the thesis is outlined. 5 1. 2 VI BRATIONAL CALCULATIONS To calculate the normal modes of vibration of an infinite cr ystal of ric;id !toms in the harmonic approximation, the interatomic force...

  6. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM

    SciTech Connect (OSTI)

    Martin E. Cobern

    2006-05-01T23:59:59.000Z

    The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II were: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in drilling laboratories and test wells. Phase II concluded on January 31, 2006. The month of January was devoted to the final preparations for, and conducting of testing of the DVMCS at TerraTek laboratories in Salt Lake City. This testing was concluded on January 27, 2006. Much of the effort in this period was then devoted to the analysis of the data and the preparation of the Phase II final report. The report was issued after the close of the period. Work on Phase III of the project began during this quarter. It has consisted of making some modifications in the prototype design to make it more suitable for field testing an more practical for commercial use. This work is continuing. The redesign effort, coupled with the current extreme lead times quoted by oilfield machine shops for collar components, will delay the deployment of the field prototypes. The precommercial prototypes are being developed in parallel, so the project should be completed per the current schedule.

  7. Downhole Vibration Monitoring & Control System

    SciTech Connect (OSTI)

    Martin E. Cobern

    2007-03-31T23:59:59.000Z

    The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II were: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in a drilling laboratory. Phase II concluded on January 31, 2006, and the Phase II final report was issued. Work on Phase III of the project began during the first quarter, 2006. Efforts the current quarter have continued to focus on the manufacture of the prototype and precommercial parts, field test planning and commercialization. The continued extreme lead times quoted by oilfield machine shops for collar components significantly delayed the deployment of the prototype and precommercial units. All parts have now been received for two units, and all but one for the third. Mechanical assembly of the first two systems is complete and the electronics installation and laboratory testing will be finished in April. We have entered into a Memorandum of Understanding with a major US oilfield equipment supplier, which calls for their assisting with our field tests, in cash and in kind. We are close to signing a definitive agreement which includes the purchase of the three precommercial units. We had also signed a CRADA with the Rocky Mountain Oilfield Test Center (RMOTC), and scheduled a test at their site, The RMOTC drilling schedule continues to slip, and the test cannot begin until the first week of May. Based on these factors, we have requested a no-cost extension to July 31, 2007.

  8. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM

    SciTech Connect (OSTI)

    Martin E. Cobern

    2005-04-27T23:59:59.000Z

    The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II are: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in drilling laboratories and test wells. As a result of the lower than expected performance of the MR damper noted last quarter, several additional tests were conducted. These dealt with possible causes of the lack of dynamic range observed in the testing: additional damping from the oil in the Belleville springs; changes in properties of the MR fluid; and, residual magnetization of the valve components. Of these, only the last was found to be significant. By using a laboratory demagnetization apparatus between runs, a dynamic range of 10:1 was achieved for the damper, more than adequate to produce the needed improvements in drilling. Additional modeling was also performed to identify a method of increasing the magnetic field in the damper. As a result of the above, several changes were made in the design. Additional circuitry was added to demagnetize the valve as the field is lowered. The valve was located to above the Belleville springs to reduce the load placed upon it and offer a greater range of materials for its construction. In addition, to further increase the field strength, the coils were relocated from the mandrel to the outer housing. At the end of the quarter, the redesign was complete and new parts were on order. The project is approximately three months behind schedule at this time.

  9. Low cost subpixel method for vibration measurement

    SciTech Connect (OSTI)

    Ferrer, Belen [Department of Civil Engineering, Univ. Alicante P.O. Box, 99, 03080 Alicante (Spain); Espinosa, Julian; Perez, Jorge; Acevedo, Pablo; Mas, David [Inst. of Physics Applied to the Sciences and Technologies, Univ. Alicante P.O. Box, 99, 03080 Alicante (Spain); Roig, Ana B. [Department of Optics, Univ. Alicante P.O. Box, 99, 03080 Alicante (Spain)

    2014-05-27T23:59:59.000Z

    Traditional vibration measurement methods are based on devices that acquire local data by direct contact (accelerometers, GPS) or by laser beams (Doppler vibrometers). Our proposal uses video processing to obtain the vibration frequency directly from the scene, without the need of auxiliary targets or devices. Our video-vibrometer can obtain the vibration frequency at any point in the scene and can be implemented with low-cost devices, such as commercial cameras. Here we present the underlying theory and some experiments that support our technique.

  10. Surface Vibrations in a Model Hcp Crystal

    E-Print Network [OSTI]

    Allen, Roland E.; Alldredg, GP; DEWITTE, FW.

    1972-01-01T23:59:59.000Z

    , and F. W. de Wette, Phys. Rev. B4, 1661 (1971). PHYSICA L RE VIE W 8 VOLUME 6, NUMBE R 2 15 JULY 1972 Surface Vibrations in a Model hcp Crystal R. E. Allen Department of Physics, Texas A @ M University, College Station, Texas 77843 and G. P.... Alldredge and F. %. de bette Department of Physics, University of Texas, Austin, Texas 78712 (Received 16 February 1972) The surface relaxation, vibrational modes, mean-square amplitudes of vibration, etc. , have been calculated for the (0001) surface...

  11. 2012 VIBRATIONAL SPECTROSCOPY GORDON RESEARCH CONFERENCE, AUGUST 5-10, 2012

    SciTech Connect (OSTI)

    Geiger, Franz

    2012-08-10T23:59:59.000Z

    The Vibrational Spectroscopy conference brings together experimentalists and theoreticians working at the frontiers of modern vibrational spectroscopy, with a special emphasis on spectroscopies that probe the structure and dynamics of molecules in gases, liquids, and at interfaces. The conference explores the wide range of state-of-the-art techniques based on vibrational motion. These techniques span the fields of time-domain, high-resolution frequency-domain, spatially-resolved, nonlinear, and multidimensional spectroscopies. The conference highlights both the application of these techniques in chemistry, materials, biology, the environment, and medicine as well as the development of theoretical models that enable one to connect spectroscopic signatures to underlying molecular motions including chemical reaction dynamics. The conference goal is to advance the field of vibrational spectroscopy by bringing together a collection of researchers who share common interests and who will gain from discussing work at the forefront of several connected areas. The intent is to emphasize the insights and understanding that studies of vibrations provide about a variety of molecular systems ranging from small polyatomic molecules to large biomolecules, nanomaterials, and environmental systems.

  12. On the neutron noise diagnostics of pressurized water reactor control rod vibrations II. Stochastic vibrations

    SciTech Connect (OSTI)

    Pazsit, I.; Glockler, O.

    1984-09-01T23:59:59.000Z

    In an earlier publication, using the theory of neutron fluctuations induced by a vibrating control rod, a complete formal solution of rod vibration diagnostics based on neutron noise measurements was given in terms of Fourier-transformed neutron detector time signals. The suggested procedure was checked in numerical simulation tests where only periodic vibrations could be considered. The procedure and its numerical testing are elaborated for stochastic two-dimensional vibrations. A simple stochastic theory of two-dimensional flow-induced vibrations is given; then the diagnostic method is formulated in the stochastic case, that is, in terms of neutron detector auto- and crosspower spectra. A previously suggested approximate rod localization technique is also formulated in the stochastic case. Applicability of the methods is then investigated in numerical simulation tests, using the proposed model of stochastic two-dimensional vibrations when generating neutron detector spectra that simulate measured data.

  13. Taking the long view

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    LANL . "Management and staff can use this tool to efficiently evaluate the impacts to the environment for activities being considered long into the future. This plan, coupled with...

  14. On the neutron noise diagnostics of pressurized water reactor control rod vibrations. 1. periodic vibrations

    SciTech Connect (OSTI)

    Pazsit, I.; Glockler, O.

    1983-10-01T23:59:59.000Z

    Based on the theory of neutron noise arising from the vibration of a localized absorber, the possibility of rod vibration diagnostics is investigated. It is found that noise source characteristics, namely rod position and vibration trajectory and spectra, can be unfolded from measured neutron noise signals. For the localization process, the first and more difficult part of the diagnostics, a procedure is suggested whose novelty is that it is applicable in case of arbitrary vibration trajectories. Applicability of the method is investigated in numerical experiments where effects of background noise are also accounted for.

  15. Electrostatic vibration-to-electric energy conversion

    E-Print Network [OSTI]

    Mur Miranda, José Oscar, 1972-

    2004-01-01T23:59:59.000Z

    Ultra-Low-Power electronics can perform useful functions with power levels as low as 170 nW. This makes them amenable to powering from ambient sources such as vibration. In this case, they can become autonomous. Motivated ...

  16. Drops bouncing on a vibrating bath

    E-Print Network [OSTI]

    Bush, John W. M.

    We present the results of a combined experimental and theoretical investigation of millimetric droplets bouncing on a vertically vibrating fluid bath. We first characterize the system experimentally, deducing the dependence ...

  17. Simulations of Vibrational Frequencies of Carbon

    E-Print Network [OSTI]

    Adler, Joan

    analytical model ­ Euler-Bernoulli theory Frequencies of the modes of the lateral vibration 8 fn ~ 1/L2 fn close to global or local buckling instabilities. 19 · The results of this study are relevant fo

  18. Multi-frequency cable vibration experiments

    E-Print Network [OSTI]

    Wiggins, Andrew (Andrew Dale)

    2005-01-01T23:59:59.000Z

    A series of Multi-Frequency cable vibration experiments at Reynolds number 7600 were carried out at the MIT Tow Tank using the Virtual Cable Towing Apparatus (VCTA). Motions observed in a Direct Numerical Simulation of a ...

  19. Harvesting energy from non-ideal vibrations

    E-Print Network [OSTI]

    Chang, Samuel C

    2013-01-01T23:59:59.000Z

    Energy harvesting has drawn significant interest for its potential to power autonomous low-power applications. Vibration energy harvesting is particularly well suited to industrial condition sensing, environmental monitoring ...

  20. Method and apparatus for vibrating a substrate during material formation

    DOE Patents [OSTI]

    Bailey, Jeffrey A. (Richland, WA) [Richland, WA; Roger, Johnson N. (Richland, WA) [Richland, WA; John, Munley T. (Benton City, WA) [Benton City, WA; Walter, Park R. (Benton City, WA) [Benton City, WA

    2008-10-21T23:59:59.000Z

    A method and apparatus for affecting the properties of a material include vibrating the material during its formation (i.e., "surface sifting"). The method includes the steps of providing a material formation device and applying a plurality of vibrations to the material during formation, which vibrations are oscillations having dissimilar, non-harmonic frequencies and at least two different directions. The apparatus includes a plurality of vibration sources that impart vibrations to the material.

  1. Collective Motion of Vibrated Polar Disks

    E-Print Network [OSTI]

    Julien Deseigne; Olivier Dauchot; Hugues Chatè

    2010-04-09T23:59:59.000Z

    We experimentally study a monolayer of vibrated disks with a built-in polar asymmetry which enables them to move quasi-balistically on a large persistence length. Alignment occurs during collisions as a result of self-propulsion and hard core repulsion. Varying the amplitude of the vibration, we observe the onset of large-scale collective motion and the existence of giant number fluctuations with a scaling exponent in agreement with the predicted theoretical value.

  2. Lattice Vibrations and Superconductivity in Layered Structures

    E-Print Network [OSTI]

    Allen, Roland E.; Alldredg, GP; WETTE, FWD.

    1970-01-01T23:59:59.000Z

    PHYSICAL REVIEW B VOLUME 2, NUMBER 7 1 OCTOB ER, 1970 Lattice Vibrations and Superconductivity in Layered Structures* B. E. Allen, G. P. Alldredge, and F. W. de bette DePartment of Physics, University of Texas, Austin, Texas 78712 (Received 18... May 1970) In order to estimate the influence of both surface and interface effects on phonon frequencies and superconducting transition temperatures in layered structures, we have calculated the vibrational modes of structures composed...

  3. Active vibration control using piezoceramic transducers

    E-Print Network [OSTI]

    Stjernstrom, Scott Christopher

    1987-01-01T23:59:59.000Z

    ACTIVE VIBRATION CONTROL ESIVG PIEZOCERAVIIC TRAiVSDI. CERS A Thesis bv SCOTT CHRISTOPHER STJERNSTRO'vl Submitted to the Office of Graduate Studies of Texas Ak?~I L niversity in partial fulfillment of the requirement for the degree of i...XIASTER OF SCIEVCE December 198i Xlajor Subject: iXIechanical Engineering ACTIVE VIBRATION CONTROL USING PIEZOCERAkIIC TRANSDUCERS A Thesis by SCOTT CHRISTOPHER STJERNSTROM Approved as to style and content by: /j': ~R. M. Alexander (Chairman of Committee...

  4. Press-in piling: Ground vibration and noise during pile installation David White*, Tim Finlay**, Malcolm Bolton*** and Grant Bearss****

    E-Print Network [OSTI]

    Bolton, Malcolm

    of press-in piling makes use of hydraulic rams to provide the force necessary to jack pre-formed piles1 Press-in piling: Ground vibration and noise during pile installation David White*, Tim Finlay-suited to the urban environment. The press- in method offers an alternative technique of pile installation, which

  5. Adaptation in constant utility nonstationary environments

    E-Print Network [OSTI]

    Littman, Michael L.

    ­stationary environments are so pathological. Even if the environment, when viewed as a monolithic function, may of the results created by the organism over some given lifespan determines the organism's fitness. The nasty, the fitness produced by any single mapping will be at the chance level. The adaptive challenge is to produce

  6. Engineering Aerial view of

    E-Print Network [OSTI]

    Yang, Junfeng

    -neutral Torus 2 Climate Change 4 Combustion and Catalysis Laboratory #12;4 5 1Engineering Revolution 5 #12;6 7Columbia Engineering Plus #12;1 1 2 3 4 5 6 Aerial view of Columbia campus with Columbia Engineering-a liated buildings highlighted in blue Columbia Engineering Plus Engineering Revolution 4

  7. Experimental laboratory system to generate high frequency test environments

    SciTech Connect (OSTI)

    Gregory, D.L.; Paez, T.L.

    1991-01-01T23:59:59.000Z

    This is an extension of two previous analytical studies to investigate a technique for generating high frequency, high amplitude vibration environments. These environments are created using a device attached to a common vibration exciter that permits multiple metal on metal impacts driving a test surface. These analytical studies predicted that test environments with an energy content exceeding 10 kHz could be achieved using sinusoidal and random shaker excitations. The analysis predicted that chaotic vibrations yielding random like test environments could be generated from sinusoidal inputs. In this study, a much simplified version of the proposed system was fabricated and tested in the laboratory. Experimental measurements demonstrate that even this simplified system, utilizing a single impacting object, can generate environments on the test surface with significant frequency content in excess of 40 kHz. Results for sinusoidal shaker inputs tuned to create chaotic impact response are shown along with the responses due to random vibration shaker inputs. The experiments and results are discussed. 4 refs., 5 figs.

  8. NEWS AND VIEWS PERSPECTIVE

    E-Print Network [OSTI]

    Herrera, Carlos M.

    , Chlamydomonas, Escherichia coli) have become the model organisms of choice for laboratory evo- lutionary in the marine environment. In this issue of Molecular Ecology, Herrera et al. (2011) add to this debate

  9. sustainable environment

    E-Print Network [OSTI]

    sustainable resource management environment fisheries aquaculture Cefas capability statement #12 that they can manage their environments and resources in a responsible, effective and sustainable manner. Our costs · Understand, assess and develop opportunities in the short, medium and long-term · Build

  10. On-line vibration and analysis system at the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Herricks, D.M.; Strunk, W.D.

    1988-02-01T23:59:59.000Z

    The enrichment facility in Paducah, KY uses a unique hard-wired vibration monitoring and analysis system for gaseous diffusion equipment. The axial flow and centrifugal flow compressors used in uranium enrichment range in size from 6 feet in diameter to less than one foot in diameter. These compressors must operate smoothly and safely, without breech of containment, since the working fluid of gaseous diffusion is gaseous UF/sub 6/. The condition of 1925 compressors is monitored by use of the 2500 point vibration analysis system. Since the failure mechanisms of the compressors are well known and documented, only one accelerometer per machine is needed for most machines. The system is completely automated and can generate spectra or broadband levels in either acceleration or velocity units. Levels are stored for historical review. The analyst can, via a custom telecommunications link, view and analyze data from all monitored points with an office PC. 4 figs.

  11. Stereoscopic optical viewing system

    DOE Patents [OSTI]

    Tallman, Clifford S. (Walnut Creek, CA)

    1987-01-01T23:59:59.000Z

    An improved optical system which provides the operator a stereoscopic viewing field and depth of vision, particularly suitable for use in various machines such as electron or laser beam welding and drilling machines. The system features two separate but independently controlled optical viewing assemblies from the eyepiece to a spot directly above the working surface. Each optical assembly comprises a combination of eye pieces, turning prisms, telephoto lenses for providing magnification, achromatic imaging relay lenses and final stage pentagonal turning prisms. Adjustment for variations in distance from the turning prisms to the workpiece, necessitated by varying part sizes and configurations and by the operator's visual accuity, is provided separately for each optical assembly by means of separate manual controls at the operator console or within easy reach of the operator.

  12. Stereoscopic optical viewing system

    DOE Patents [OSTI]

    Tallman, C.S.

    1986-05-02T23:59:59.000Z

    An improved optical system which provides the operator with a stereoscopic viewing field and depth of vision, particularly suitable for use in various machines such as electron or laser beam welding and drilling machines. The system features two separate but independently controlled optical viewing assemblies from the eyepiece to a spot directly above the working surface. Each optical assembly comprises a combination of eye pieces, turning prisms, telephoto lenses for providing magnification, achromatic imaging relay lenses and final stage pentagonal turning prisms. Adjustment for variations in distance from the turning prisms to the workpiece, necessitated by varying part sizes and configurations and by the operator's visual accuity, is provided separately for each optical assembly by means of separate manual controls at the operator console or within easy reach of the operator.

  13. Vibration monitoring system for drill string

    SciTech Connect (OSTI)

    Wassell, M.E.

    1993-07-13T23:59:59.000Z

    A vibration monitoring system is described for use in monitoring lateral and torsional vibrations in a drill string comprising: a drill string component having an outer surface; first accelerometer means A[sub 1] for measuring tangential acceleration; second accelerometer means A[sub 2] for measuring tangential acceleration; third accelerometer means A[sub 3] for measuring tangential acceleration; said first, second and third accelerometer means A[sub 1], A[sub 2] and A[sub 3] being mounted in said drill string component and being spaced from one another to measure acceleration forces on said drill string component tangentially with respect to the outer surface of said component wherein said first, second and third accelerometer means are adapted to measure and distinguish between lateral and torsional vibrations exerted on said drill string component.

  14. DSW Environment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    pdf) Section 2 - Proposed Action and Alternatives (6.8 MB pdf) Section 3 - Affected Environment for the extension of the right of way to the Harry Allen Substation and for the...

  15. TEST SYSTEM FOR EVALUATING SPENT NUCLEAR FUEL BENDING STIFFNESS AND VIBRATION INTEGRITY

    SciTech Connect (OSTI)

    Wang, Jy-An John [ORNL] [ORNL; Wang, Hong [ORNL] [ORNL; Bevard, Bruce Balkcom [ORNL] [ORNL; Howard, Rob L [ORNL] [ORNL; Flanagan, Michelle [U.S. Nuclear Regulatory Commission] [U.S. Nuclear Regulatory Commission

    2013-01-01T23:59:59.000Z

    Transportation packages for spent nuclear fuel (SNF) must meet safety requirements specified by federal regulations. For normal conditions of transport, vibration loads incident to transport must be considered. This is particularly relevant for high-burnup fuel (>45 GWd/MTU). As the burnup of the fuel increases, a number of changes occur that may affect the performance of the fuel and cladding in storage and during transportation. The mechanical properties of high-burnup de-fueled cladding have been previously studied by subjecting defueled cladding tubes to longitudinal (axial) tensile tests, ring-stretch tests, ring-compression tests, and biaxial tube burst tests. The objective of this study is to investigate the mechanical properties and behavior of both the cladding and the fuel in it under vibration/cyclic loads similar to the sustained vibration loads experienced during normal transport. The vibration loads to SNF rods during transportation can be characterized by dynamic, cyclic, bending loads. The transient vibration signals in a specified transport environment can be analyzed, and frequency, amplitude and phase components can be identified. The methodology being implemented is a novel approach to study the vibration integrity of actual SNF rod segments through testing and evaluating the fatigue performance of SNF rods at defined frequencies. Oak Ridge National Laboratory (ORNL) has developed a bending fatigue system to evaluate the response of the SNF rods to vibration loads. A three-point deflection measurement technique using linear variable differential transformers is used to characterize the bending rod curvature, and electromagnetic force linear motors are used as the driving system for mechanical loading. ORNL plans to use the test system in a hot cell for SNF vibration testing on high burnup, irradiated fuel to evaluate the pellet-clad interaction and bonding on the effective lifetime of fuel-clad structure bending fatigue performance. Technical challenges include pure bending implementation, remote installation and detachment of the SNF test specimen, test specimen deformation measurement, and identification of a driving system suitable for use in a hot cell. Surrogate test specimens have been used to calibrate the test setup and conduct systematic cyclic tests. The calibration and systematic cyclic tests have been used to identify test protocol issues prior to implementation in the hot cell. In addition, cyclic hardening in unidirectional bending and softening in reverse bending were observed in the surrogate test specimens. The interface bonding between the surrogate clad and pellets was found to impact the bending response of the surrogate rods; confirming this behavior in the actual spent fuel segments will be an important aspect of the hot cell test implementation,

  16. Surrogate Spent Nuclear Fuel Vibration Integrity Investigation

    SciTech Connect (OSTI)

    Wang, Jy-An John [ORNL; Wang, Hong [ORNL; Bevard, Bruce Balkcom [ORNL; Howard, Rob L [ORNL

    2014-01-01T23:59:59.000Z

    Transportation packages for spent nuclear fuel (SNF) must meet safety requirements under normal and accident conditions as specified by federal regulations. During transportation, SNF experiences unique conditions and challenges to cladding integrity due to the vibrational and impact loading encountered during road or rail shipment. ORNL has been developing testing capabilities that can be used to improve our understanding of the impacts of vibration loading on SNF integrity, especially for high burn-up SNF in normal transportation operation conditions. This information can be used to meet nuclear industry and U.S. Nuclear Regulatory Commission needs in the area of safety of SNF storage and transportation operations.

  17. MONITORING OF VIBRATIONS FOR THE PROTECTION OF ARCHITECTURAL HERITAGE

    E-Print Network [OSTI]

    Boyer, Edmond

    MONITORING OF VIBRATIONS FOR THE PROTECTION OF ARCHITECTURAL HERITAGE Andrea E. Del Grosso1 , Paolo the integrity and conservation of architectural heritage buildings. The paper reviews the main issues : Structural Health Monitoring, vibration measurements, interpretation models, historical buildings

  18. Multi-view kernel construction

    E-Print Network [OSTI]

    Sa, Virginia R.; Gallagher, Patrick W.; Lewis, Joshua M.; Malave, Vicente L.

    2010-01-01T23:59:59.000Z

    5157-z Multi-view kernel construction Virginia R. de Sa ·multiple different graph construction algorithms. The Ng et

  19. Structure and vibrations of different charge Ge impurity in ?-quartz

    SciTech Connect (OSTI)

    Kislov, A. N., E-mail: a.n.kislov@urfu.ru; Mikhailovich, A. P., E-mail: a.n.kislov@urfu.ru; Zatsepin, A. F., E-mail: a.n.kislov@urfu.ru [Ural Federal University, 19 Mira St., Yekaterinburg, 620002 (Russian Federation)

    2014-10-21T23:59:59.000Z

    Atomic structure and localized vibrations of ??SiO{sub 2}:Ge are studied using computer modeling techniques. The simulation was carried out by the lattice dynamics calculation of the local density of vibrational states. Local structures parameters are calculated, localized symmetrized vibrations frequency caused by Ge impurity in different charge states are defined. The movements of atoms located near Ge impurity are analyzed and their contribution into localized vibrations of different type is evaluated.

  20. Evolvable View Environment (EVE) : Non-Equivalent View Maintenance under Schema Changes *

    E-Print Network [OSTI]

    Madiraju, Praveen

    .A. Rundensteiner, A. Koeller, X. Zhang A. VanWyk, Y. Li Department of Computer Science Worcester Polytechnic would like to thank our industrial sponsors, in particular, IBM for the IBM partnership award University of Science and Technology University of Michigan Clear Water Bay, Hong Kong Ann Arbor, MI 48109

  1. TotalView Training

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengthening a solidSynthesisAppliances » Top InnovativeTopoisomeraseTotalView

  2. Department of Mechanical Engineering Fall 2011 Flowserve Vibration Energy Harvesting

    E-Print Network [OSTI]

    Demirel, Melik C.

    PENNSTATE Department of Mechanical Engineering Fall 2011 Flowserve Vibration Energy Harvesting of these vibrations, Flowseve is looking at using vibration absorbers coupled with energy harvesting technology a steady state DC output The prototype was created using water jet cutting and milling to create the parts

  3. DOE/ANL/HTRI heat exchanger tube vibration data bank

    SciTech Connect (OSTI)

    Halle, H.; Chenoweth, J.M.; Wambsganss, M.W.

    1981-01-01T23:59:59.000Z

    This addendum to the DOE/ANL/HTRI Heat Exchanger Tube Vibration Data Bank includes 16 new case histories of field experiences. The cases include several exchangers that did not experience vibration problems and several for which acoustic vibration was reported.

  4. Active Automobile Engine Vibration Analysis Technical Report Number 1

    E-Print Network [OSTI]

    Levi, Anthony F. J.

    Active Automobile Engine Vibration Analysis Technical Report Number 1 Page 1 of 26 DISTRIBUTION STATEMENT: Distribution authorized to all. Active Automobile Engine Vibration Analysis Technical Report at the University of Southern California #12;Active Automobile Engine Vibration Analysis Technical Report Number 1

  5. Protective laser beam viewing device

    DOE Patents [OSTI]

    Neil, George R.; Jordan, Kevin Carl

    2012-12-18T23:59:59.000Z

    A protective laser beam viewing system or device including a camera selectively sensitive to laser light wavelengths and a viewing screen receiving images from the laser sensitive camera. According to a preferred embodiment of the invention, the camera is worn on the head of the user or incorporated into a goggle-type viewing display so that it is always aimed at the area of viewing interest to the user and the viewing screen is incorporated into a video display worn as goggles over the eyes of the user.

  6. HYDROGEN LOCAL VIBRATIONAL MODES IN COMPOUND SEMICONDUCTORS

    E-Print Network [OSTI]

    McCluskey, Matthew

    HYDROGEN LOCAL VIBRATIONAL MODES IN COMPOUND SEMICONDUCTORS M.D. MCCLUSKEY* University) spectroscopy of hydrogen and deuterium in GaP, AlSb, ZnSe, and GaN has provided important information about the structures of dopant- hydrogen complexes and their interaction with the host lattice. In GaN:Mg, for example

  7. Vibration damping required for overhead lines

    SciTech Connect (OSTI)

    Richardson, A.S. Jr. [Research Consulting Associates, Lexington, MA (United States)] [Research Consulting Associates, Lexington, MA (United States)

    1995-04-01T23:59:59.000Z

    Transmission line engineers have sought an easy method for evaluating if external dampers are required on any new transmission line. In the past this question has been given to the damper manufacturer who has a vested interest in a affirmative answer. For single conductors (and for bundled conductors) the vibration level of a power line conductor is the result of a complicated aerodynamic process in which energy is taken into the motion from vortex action on the lee side of the conductor. The amount of energy taken in is a non-linear function of vibration amplitude, frequency, conductor diameter, and wind speed. The amount of energy taken out is a non-linear function of vibration amplitude, frequency, conductor mass, conductor tension, and a certain friction constant that varies from conductor to conductor. It is known that a small amount of vibration is allowed without endangering the conductor. This has been called the IEEE limit loop velocity, and is numerically equal to 200 mm/second. This paper explains a simple procedure, applicable to single conductors, which calculates a comparison of energy in vs. energy out. From this process it is shown how to select the initial tension in the conductor so that no external dampers are required.

  8. SEISMIC VULNERABILITY ASSESSMENT USING AMBIENT VIBRATIONS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    SEISMIC VULNERABILITY ASSESSMENT USING AMBIENT VIBRATIONS: METHOD AND VALIDATION Clotaire Michel, France cmichel@obs.ujf-grenoble.fr Abstract Seismic vulnerability in wide areas is usually assessed like USA or Italy. France is a country with moderate seismicity so that it requires lower-cost methods

  9. Apparatus and methods for determining at least one characteristic of a proximate environment

    DOE Patents [OSTI]

    Novascone, Stephen R. (Idaho Falls, ID); West, Phillip B. (Idaho Falls, ID); Anderson, Michael J. (Troy, ID)

    2008-04-15T23:59:59.000Z

    Methods and an apparatus for determining at least one characteristic of an environment are disclosed. A vibrational energy may be imparted into an environment and a magnitude of damping of the vibrational energy may be measured and at least one characteristic of the environment may be determined. Particularly, a vibratory source may be operated and coupled to an environment. At least one characteristic of the environment may be determined based on a shift in at least one steady-state frequency of oscillation of the vibratory source. An apparatus may include at least one vibratory source and a structure for positioning the at least one vibratory source proximate to an environment. Further, the apparatus may include an analysis device for determining at least one characteristic of the environment based at least partially upon shift in a steady-state oscillation frequency of the vibratory source for the given impetus.

  10. Downhole Vibration Monitoring and Control System

    SciTech Connect (OSTI)

    Martin E. Cobern

    2007-09-30T23:59:59.000Z

    The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. The key feature of this system is its use of a magnetorheological fluid (MRF) to allow the damping coefficient to be changed extensively, rapidly and reversibly without the use of mechanical valves, but only by the application of a current. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. Much of the effort was devoted to the design and testing of the MRF damper, itself. The principal objectives of Phase II were: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in a drilling laboratory. Phase II concluded on January 31, 2006, and a final report was issued. Work on Phase III of the project began during the first quarter, 2006, with the objectives of building precommercial prototypes, testing them in a drilling laboratory and the field; developing and implementing a commercialization plan. All of these have been accomplished. The Downhole Vibration Monitoring & Control System (DVMCS) prototypes have been successfully proven in testing at the TerraTek drilling facility and at the Rocky Mountain Oilfield Test Center (RMOTC.) Based on the results of these tests, we have signed a definitive development and distribution agreement with Smith, and commercial deployment is underway. This current version of the DVMCS monitors and controls axial vibrations. Due to time and budget constraints of this program, it was not possible to complete a system that would also deal with lateral and torsional (stick-slip) vibrations as originally planned; however, this effort is continuing without DOE funding.

  11. The photodissociation and reaction dynamics of vibrationally excited molecules

    SciTech Connect (OSTI)

    Crim, F.F. [Univ. of Wisconsin, Madison (United States)

    1993-12-01T23:59:59.000Z

    This research determines the nature of highly vibrationally excited molecules, their unimolecular reactions, and their photodissociation dynamics. The goal is to characterize vibrationally excited molecules and to exploit that understanding to discover and control their chemical pathways. Most recently the author has used a combination of vibrational overtone excitation and laser induced fluorescence both to characterize vibrationally excited molecules and to study their photodissociation dynamics. The author has also begun laser induced grating spectroscopy experiments designed to obtain the electronic absorption spectra of highly vibrationally excited molecules.

  12. Methods of performing downhole operations using orbital vibrator energy sources

    DOE Patents [OSTI]

    Cole, Jack H.; Weinberg, David M.; Wilson, Dennis R.

    2004-02-17T23:59:59.000Z

    Methods of performing down hole operations in a wellbore. A vibrational source is positioned within a tubular member such that an annulus is formed between the vibrational source and an interior surface of the tubular member. A fluid medium, such as high bulk modulus drilling mud, is disposed within the annulus. The vibrational source forms a fluid coupling with the tubular member through the fluid medium to transfer vibrational energy to the tubular member. The vibrational energy may be used, for example, to free a stuck tubular, consolidate a cement slurry and/or detect voids within a cement slurry prior to the curing thereof.

  13. Vertical vibration and shape oscillation of acoustically levitated water drops

    SciTech Connect (OSTI)

    Geng, D. L.; Xie, W. J.; Yan, N.; Wei, B., E-mail: bbwei@nwpu.edu.cn [Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072 (China)

    2014-09-08T23:59:59.000Z

    We present the vertical harmonic vibration of levitated water drops within ultrasound field. The restoring force to maintain such a vibration mode is provided by the resultant force of acoustic radiation force and drop gravity. Experiments reveal that the vibration frequency increases with the aspect ratio for drops with the same volume, which agrees with the theoretical prediction for those cases of nearly equiaxed drops. During the vertical vibration, the floating drops undergo the second order shape oscillation. The shape oscillation frequency is determined to be twice the vibration frequency.

  14. False color viewing device

    DOE Patents [OSTI]

    Kronberg, J.W.

    1991-05-08T23:59:59.000Z

    This invention consists of a viewing device for observing objects in near-infrared false-color comprising a pair of goggles with one or more filters in the apertures, and pads that engage the face for blocking stray light from the sides so that all light reaching, the user`s eyes come through the filters. The filters attenuate most visible light and pass near-infrared (having wavelengths longer than approximately 700 nm) and a small amount of blue-green and blue-violet (having wavelengths in the 500 to 520 nm and shorter than 435 nm, respectively). The goggles are useful for looking at vegetation to identify different species and for determining the health of the vegetation, and to detect some forms of camouflage.

  15. False color viewing device

    DOE Patents [OSTI]

    Kronberg, James W. (108 Independent Blvd., Aiken, SC 29801)

    1992-01-01T23:59:59.000Z

    A viewing device for observing objects in near-infrared false-color comprising a pair of goggles with one or more filters in the apertures, and pads that engage the face for blocking stray light from the sides so that all light reaching the user's eyes come through the filters. The filters attenuate most visible light and pass near-infrared (having wavelengths longer than approximately 700 nm) and a small amount of blue-green and blue-violet (having wavelengths in the 500 to 520 nm and shorter than 435 nm, respectively). The goggles are useful for looking at vegetation to identify different species and for determining the health of the vegetation, and to detect some forms of camouflage.

  16. False color viewing device

    DOE Patents [OSTI]

    Kronberg, J.W.

    1992-10-20T23:59:59.000Z

    A viewing device for observing objects in near-infrared false-color comprising a pair of goggles with one or more filters in the apertures, and pads that engage the face for blocking stray light from the sides so that all light reaching the user's eyes come through the filters. The filters attenuate most visible light and pass near-infrared (having wavelengths longer than approximately 700 nm) and a small amount of blue-green and blue-violet (having wavelengths in the 500 to 520 nm and shorter than 435 nm, respectively). The goggles are useful for looking at vegetation to identify different species and for determining the health of the vegetation, and to detect some forms of camouflage. 7 figs.

  17. The view from Kiev

    SciTech Connect (OSTI)

    Kiselyov, S.

    1993-11-01T23:59:59.000Z

    This article reports the observations of correspondents for the Bulletin (two Russian journalists, one based in Moscow, the other in Kiev) who investigated the status of the Soviet Union's Black Sea Fleet and Ukraine's status as a non-nuclear-weapons state. After two years of wrangling and two earlier failed settlements, Russian President Boris Yeltsin met with Ukrainian President Leonid Kravchuk at Massandra in Crimea. On September 3, the leaders announced that Russia would buy out Ukraine's interest in the fleet and lease the port at Sevastopol. The Massandra summit was also supposed to settle Ukraine's status as a non-nuclear-weapons state. Described here are the Kiev-based correspondent's views on the Massandra summit (and its major topics), which was to have been called off by the Russian foreign ministry when Ukrainian Prime Minister Leonid Kuchma resigned.

  18. Characterization of the Virgo Seismic Environment

    E-Print Network [OSTI]

    Accadia, T; Astone, P; Ballardin, G; Barone, F; Barsuglia, M; Basti, A; Bauer, Th S; Bebronne, M; Beker, M G; Belletoile, A; Bitossi, M; Bizouard, M A; Blom, M; Bondu, F; Bonelli, L; Bonnand, R; Boschi, V; Bosi, L; Bouhou, B; Braccini, S; Bradaschia, C; Branchesi, M; Briant, T; Brillet, A; Brisson, V; Bulik, T; Bulten, H J; Buskulic, D; Buy, C; Cagnoli, G; Calloni, E; Canuel, B; Carbognani, F; Cavalier, F; Cavalieri, R; Cella, G; Cesarini, E; Chaibi, O; Chassande-Mottin, E; Chincarini, A; Chiummo, A; Cleva, F; Coccia, E; Cohadon, P -F; Colacino, C N; Colas, J; Colla, A; Colombini, M; Conte, A; Coughlin, M; Coulon, J -P; Cuoco, E; DAntonio, S; Dattilo, V; Davier, M; Day, R; De Rosa, R; Debreczeni, G; Del Pozzo, W; del Prete, M; Di Fiore, L; Di Lieto, A; Emilio, M Di Paolo; Di Virgilio, A; Dietz, A; Drago, M; Endroczi, G; Fafone, V; Ferrante, I; Fidecaro, F; Fiori, I; Flaminio, R; Forte, L A; Fournier, J -D; Franc, J; Frasca, S; Frasconi, F; Galimberti, M; Gammaitoni, L; Garufi, F; Gaspar, M E; Gemme, G; Genin, E; Gennai, A; Giazotto, A; Gouaty, R; Granata, M; Greverie, C; Guidi, G M; Hayau, J -F; Heidmann, A; Heitmann, H; Hello, P; Jaranowski, P; Kowalska, I; Krolak, A; Leroy, N; Letendre, N; Li, T G F; Liguori, N; Lorenzini, M; Loriette, V; Losurdo, G; Majorana, E; Maksimovic, I; Man, N; Mantovani, M; Marchesoni, F; Marion, F; Marque, J; Martelli, F; Masserot, A; Michel, C; Milano, L; Minenkov, Y; Mohan, M; Morgado, N; Morgia, A; Mosca, S; Mours, B; Naticchioni, L; Nocera, F; Pagliaroli, G; Palladino, L; Palomba, C; Paoletti, F; Parisi, M; Pasqualetti, A; Passaquieti, R; Passuello, D; Persichetti, G; Piergiovanni, F; Pietka, M; Pinard, L; Poggiani, R; Prato, M; Prodi, G A; Punturo, M; Puppo, P; Rabeling, D S; Racz, I; Rapagnani, P; Re, V; Regimbau, T; Ricci, F; Robinet, F; Rocchi, A; Rolland, L; Romano, R; Rosinska, D; Ruggi, P; Sassolas, B; Sentenac, D; Sperandio, L; Sturani, R; Swinkels, B; Tacca, M; Taffarello, L; Toncelli, A; Tonelli, M; Torre, O; Tournefier, E; Travasso, F; Vajente, G; Brand, J F J van den; Broeck, C Van Den; van der Putten, S; Vasuth, M; Vavoulidis, M; Vedovato, G; Verkindt, D; Vetrano, F; Vicere, A; Vinet, J -Y; Vitale, S; Vocca, H; Ward, R L; Was, M; Yvert, M; Zadrozny, A; Zendri, J -P

    2011-01-01T23:59:59.000Z

    The Virgo gravitational wave detector is an interferometer (ITF) with 3km arms located in Pisa, Italy. From July to October 2010, Virgo performed its third science run (VSR3) in coincidence with the LIGO detectors. Despite several techniques adopted to isolate the interferometer from the environment, seismic noise remains an important issue for Virgo. Vibrations produced by the detector infrastructure (such as air conditioning units, water chillers/heaters, pumps) are found to affect Virgo's sensitivity, with the main coupling mechanisms being through beam jitter and scattered light processes. The Advanced Virgo (AdV) design seeks to reduce ITF couplings to environmental noise by having most vibration-sensitive components suspended and in-vacuum, as well as muffle and relocate loud machines. During the months of June and July 2010, a Guralp-3TD seismometer was stationed at various locations around the Virgo site hosting major infrastructure machines. Seismic data were examined using spectral and coherence ana...

  19. Adjustable Nonlinear Springs to Improve Efficiency of Vibration Energy Harvesters

    E-Print Network [OSTI]

    S. Boisseau; G. Despesse; B. Ahmed Seddik

    2015-06-01T23:59:59.000Z

    Vibration Energy Harvesting is an emerging technology aimed at turning mechanical energy from vibrations into electricity to power microsystems of the future. Most of present vibration energy harvesters are based on a mass spring structure introducing a resonance phenomenon that allows to increase the output power compared to non-resonant systems, but limits the working frequency bandwidth. Therefore, they are not able to harvest energy when ambient vibrations' frequencies shift. To follow shifts of ambient vibration frequencies and to increase the frequency band where energy can be harvested, one solution consists in using nonlinear springs. We present in this paper a model of adjustable nonlinear springs (H-shaped springs) and their benefits to improve velocity-damped vibration energy harvesters' (VEH) output powers. A simulation on a real vibration source proves that the output power can be higher in nonlinear devices compared to linear systems (up to +48%).

  20. Vibration welding system with thin film sensor

    DOE Patents [OSTI]

    Cai, Wayne W; Abell, Jeffrey A; Li, Xiaochun; Choi, Hongseok; Zhao, Jingzhou

    2014-03-18T23:59:59.000Z

    A vibration welding system includes an anvil, a welding horn, a thin film sensor, and a process controller. The anvil and horn include working surfaces that contact a work piece during the welding process. The sensor measures a control value at the working surface. The measured control value is transmitted to the controller, which controls the system in part using the measured control value. The thin film sensor may include a plurality of thermopiles and thermocouples which collectively measure temperature and heat flux at the working surface. A method includes providing a welder device with a slot adjacent to a working surface of the welder device, inserting the thin film sensor into the slot, and using the sensor to measure a control value at the working surface. A process controller then controls the vibration welding system in part using the measured control value.

  1. Hole interactions with molecular vibrations on DNA

    E-Print Network [OSTI]

    A. Omerzu; M. Licer; T. Mertelj; V. V. Kabanov; D. Mihailovic

    2004-05-13T23:59:59.000Z

    We report on a study of the interactions between holes and molecular vibrations on dry DNA using photoinduced infrared absorption spectroscopy. Laser photoexcited (PE) holes are found to have a room-temperature lifetime in excess of 1 ms, clearly indicating the presence of localization. However, from a quantitative model analysis of the frequency shifts of vibrational modes caused by the PE holes, we find the holevibrational coupling constant to be relatively small, 0.2. This interaction leads to a change in the conformational energy of 0.015 eV, which is too small to cause selftrapping at room temperature. We conclude that, at least in the dry (A) form, DNA is best understood in terms of a double chain of coupled quantum dots arising from the pseudo-random chain sequence of base pairs, in which Anderson localization prevents the formation of a metallic state.

  2. Transportation Shock and Vibration Literature Review

    SciTech Connect (OSTI)

    Maheras, Steven J.; Lahti, Erik A.; Ross, Steven B.

    2013-06-06T23:59:59.000Z

    This report fulfills the M4 milestone M4FT-13OR08220112, "Report Documenting Experimental Activities." The purpose of this report is to document the results of a literature review conducted of studies related to the vibration and shock associated with the normal conditions of transport for rail shipments of used nuclear fuel from commercial light-water reactors. As discussed in Adkins (2013), the objective of this report is to determine if adequate data exist that would enable the impacts of the shock and vibration associated with the normal conditions of transport on commercial light-water reactor used nuclear fuel shipped in current generation rail transportation casks to be realistically modeled.

  3. Automatic monitoring of vibration welding equipment

    DOE Patents [OSTI]

    Spicer, John Patrick; Chakraborty, Debejyo; Wincek, Michael Anthony; Wang, Hui; Abell, Jeffrey A; Bracey, Jennifer; Cai, Wayne W

    2014-10-14T23:59:59.000Z

    A vibration welding system includes vibration welding equipment having a welding horn and anvil, a host device, a check station, and a robot. The robot moves the horn and anvil via an arm to the check station. Sensors, e.g., temperature sensors, are positioned with respect to the welding equipment. Additional sensors are positioned with respect to the check station, including a pressure-sensitive array. The host device, which monitors a condition of the welding equipment, measures signals via the sensors positioned with respect to the welding equipment when the horn is actively forming a weld. The robot moves the horn and anvil to the check station, activates the check station sensors at the check station, and determines a condition of the welding equipment by processing the received signals. Acoustic, force, temperature, displacement, amplitude, and/or attitude/gyroscopic sensors may be used.

  4. BENEFITS OF VIBRATION ANALYSIS FOR DEVELOPMENT OF EQUIPMENT IN HLW TANKS - 12341

    SciTech Connect (OSTI)

    Stefanko, D.; Herbert, J.

    2012-01-10T23:59:59.000Z

    Vibration analyses of equipment intended for use in the Savannah River Site (SRS) radioactive liquid waste storage tanks are performed during pre-deployment testing and has been demonstrated to be effective in reducing the life-cycle costs of the equipment. Benefits of using vibration analysis to identify rotating machinery problems prior to deployment in radioactive service will be presented in this paper. Problems encountered at SRS and actions to correct or lessen the severity of the problem are discussed. In short, multi-million dollar cost saving have been realized at SRS as a direct result of vibration analysis on existing equipment. Vibration analysis of equipment prior to installation can potentially reduce inservice failures, and increases reliability. High-level radioactive waste is currently stored in underground carbon steel waste tanks at the United States Department of Energy (DOE) Savannah River Site and at the Hanford Site, WA. Various types of rotating machinery (pumps and separations equipment) are used to manage and retrieve the tank contents. Installation, maintenance, and repair of these pumps and other equipment are expensive. In fact, costs to remove and replace a single pump can be as high as a half million dollars due to requirements for radioactive containment. Problems that lead to in-service maintenance and/or equipment replacement can quickly exceed the initial investment, increase radiological exposure, generate additional waste, and risk contamination of personnel and the work environment. Several different types of equipment are considered in this paper, but pumps provide an initial example for the use of vibration analysis. Long-shaft (45 foot long) and short-shaft (5-10 feet long) equipment arrangements are used for 25-350 horsepower slurry mixing and transfer pumps in the SRS HLW tanks. Each pump has a unique design, operating characteristics and associated costs, sometimes exceeding a million dollars. Vibration data are routinely collected during pre-installation tests and screened for: Critical speeds or resonance, Imbalance of rotating parts, Shaft misalignment, Fluid whirl or lubrication break down, Bearing damages, and Other component abnormalities. Examples of previous changes in operating parameters and fabrication tolerances and extension of equipment life resulting from the SRS vibration analysis program include: (1) Limiting operational speeds for some pumps to extend service life without design or part changes; (2) Modifying manufacturing methods (tightening tolerances) for impellers on slurry mixing pumps based on vibration data that indicated hydraulic imbalance; (3) Identifying rolling element mounting defects and replacing those components in pump seals before installation; and (4) Identifying the need for bearing design modification for SRS long-shaft mixing pump designs to eliminate fluid whirl and critical speeds which significantly increased the equipment service life. In addition, vibration analyses and related analyses have been used during new equipment scale-up tests to identify the need for design improvements for full-scale operation / deployment of the equipment in the full size tanks. For example, vibration analyses were recently included in the rotary micro-filtration scale-up test program at SRNL.

  5. Sum Frequency Generation Vibrational Spectroscopy of Adsorbed Amino Acids, Peptides, and Proteins at Hydrophilic and Hydrophobic Solid-Water Interfaces

    E-Print Network [OSTI]

    Holinga, George J.

    2010-01-01T23:59:59.000Z

    Chapter 2 Sum Frequency Generation Vibrational Spectroscopy2.1. Sum Frequency Generation Vibrational SpectroscopyIntroduction Sum frequency generation (SFG) vibrational

  6. Diagnosing subsynchronous vibrations in turbomachinery - stable or unstable

    E-Print Network [OSTI]

    Rajagopalan, Vinayaka Narayanan

    2009-05-15T23:59:59.000Z

    friction whip defies the general rules of thumb for diagnosing a true instability and at the same time is a very violent one as well. The last phenomenon to be studied is coupled lateral-torsional vibrations. A special test rig was built to study... this effect, and clear indicators have been identified to distinguish the response as resulting from torsional vibrations and also classify it as a benign source of subsynchronous vibration. The test rig is also mathematically modeled to predict its...

  7. APS Protocol for Reporting Construction Vibration Issues for...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    that shown in the online version. Advanced Photon Source APS Protocol for Reporting Construction Vibration Issues for Beamlines Section where used: This procedure describes the...

  8. VIBRATION CHARACTERISTICS OF AN APS LAB FACILITY IN BUILDING...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    VIBRATION CHARACTERISTICS OF AN APS LAB FACILITY IN BUILDING 401 by T. J. Royston, Summer Faculty Participant Experimental Facilities Division, Advanced Photon Source, Argonne...

  9. Explicit Correlated Exciton-Vibrational Dynamics of the FMO Complex

    E-Print Network [OSTI]

    Schulze, Jan

    2015-01-01T23:59:59.000Z

    The coupled exciton-vibrational dynamics of a 3-site FMO model is investigated using the numerically exact multilayer multiconfiguration time-dependent Hartree approach. Thereby the vibrational mode specific coupling to local electronic transitions is adapted from a discretized experimental spectral density. The solution of the resulting time-dependent Schr\\"odinger equation including three electronic and 450 vibrational degrees of freedom is analyzed in terms of excitonic populations and coherences. Emphasis is put onto the role of specific ranges of vibrational frequencies. It is observed that modes between 160 and 300 cm$^{-1}$ are responsible for the subpicosecond population and coherence decay.

  10. Vibrational energy transfer in ultracold molecule - molecule collisions

    E-Print Network [OSTI]

    Goulven Quéméner; Naduvalath Balakrishnan; Roman V. Krems

    2008-01-15T23:59:59.000Z

    We present a rigorous study of vibrational relaxation in p-H2 + p-H2 collisions at cold and ultracold temperatures and identify an efficient mechanism of ro-vibrational energy transfer. If the colliding molecules are in different rotational and vibrational levels, the internal energy may be transferred between the molecules through an extremely state-selective process involving simultaneous conservation of internal energy and total rotational angular momentum. The same transition in collisions of distinguishable molecules corresponds to the rotational energy transfer from one vibrational state of the colliding molecules to another.

  11. active vibration isolation: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ultra-precision instruments such as the MITCaltech Laser-Interferometric Gravitational Wave Observatory ... Zuo, Lei, 1974- 2005-01-01 5 Active vibration isolation of a...

  12. aqueous solution vibrational: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    phase liquids in porous media. Open Access Theses and Dissertations Summary: ??Acoustic wave stimulation, such as vibration-induced mobilization, is a promising enhancement...

  13. Coal storage hopper with vibrating-screen agitator

    DOE Patents [OSTI]

    Daw, C.S.; Lackey, M.E.; Sy, R.L.

    1982-04-27T23:59:59.000Z

    The present invention is directed to a vibrating screen agitator in a coal storage hopper for assuring the uniform feed of coal having sufficient moisture content to effect agglomeration and bridging thereof in the coal hopper from the latter onto a conveyer mechanism. The vibrating scrren agitator is provided by a plurality of transversely oriented and vertically spaced apart screens in the storage hopper with a plurality of vertically oriented rods attached to the screens. The rods are vibrated to effect the vibration of the screens and the breaking up of agglomerates in the coal which might impede the uniform flow of the coal from the hopper onto a conveyer.

  14. Vibration Power Harvesting | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your DensityEnergy U.S.-China Electric Vehicle and03/02Report | DepartmentTRU PassiveNovember 1,Vibration Power

  15. Experimental Vibrational Zero-Point Energies: Diatomic Molecules Karl K. Irikuraa...

    E-Print Network [OSTI]

    Magee, Joseph W.

    Experimental Vibrational Zero-Point Energies: Diatomic Molecules Karl K. Irikuraa... Physical online 18 April 2007 Vibrational zero-point energies ZPEs , as determined from published spectroscopic: molecular energetics; uncertainty; vibrational spectroscopy; zero-point energy. CONTENTS 1. Introduction

  16. A multi-frequency induction heating system for a thermally triggered gel polymer dynamic vibration absorber

    E-Print Network [OSTI]

    Rodriguez, John Israel, 1972-

    2003-01-01T23:59:59.000Z

    Since its invention in the early part of the twentieth century, the dynamic vibration absorber (DVA) has played an important role in vibration suppression. In its simplest form, a dynamic vibration absorber is a mechanical ...

  17. A Regulator's View of Cogeneration

    E-Print Network [OSTI]

    Shanaman, S. M.

    1982-01-01T23:59:59.000Z

    of the total national electric generation. In view of the energy requirements of Pennsylvania's industry and the impact of increasing energy costs on employment the Commission directed its technical staff to investigate the potential for industrial cogeneration...

  18. An environment for font design

    E-Print Network [OSTI]

    Barkovic, Lily

    1986-01-01T23:59:59.000Z

    Characters 4, TEX System Flowchart 5. A Likely Curve . 6. The Drawing Window . 7. Font Parameter Window 8. Point Coordinate Window 9. Source Window Page 10 12 15 17 18 19 INTRODUCTION Today's workstations enable users to interactively view data..., into an environment that makes them easy to use through visual tools. One should keep in mind that despite the good features of the systems mentioned above, neither of them enable users to create quality fonts in a short period of time. In [15], Donald Knuth...

  19. anharmonic vibrational dynamics: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    anharmonic vibrational dynamics First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Anharmonic Vibrational...

  20. ambient vibration test: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    vibration test First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Ambient Vibration Tests and Modal...

  1. Ambient habitat noise and vibration at the Georgia Aquarium

    E-Print Network [OSTI]

    Johnson, Michael T.

    Ambient habitat noise and vibration at the Georgia Aquarium P. M. Scheifele Department significant levels of background noise due to pumps and motors. This noise, together with pool architecture to quantify the ambient noise levels in the water from machine vibration and from in-air performance speaker

  2. VIBRATION CONTROL IN A SMART BEAM Daniel R. Fay*

    E-Print Network [OSTI]

    Patil, Mayuresh

    activity and nearby motorized equipment. In this case, disturbance is produced using a white noise signal for vibration suppression, stability augmentation, and noise reduction in beam-like aerodynamic surfacesVIBRATION CONTROL IN A SMART BEAM Daniel R. Fay* Widener University, Chester, Pennsylvania Abstract

  3. Electromagnetic actuator to reduce vibration sources Thibaut Chailloux*

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    in an FE- Tuned Magnetic Equivalent Circuit of an Electromagnetic Relay, Sixdenier F., Raulet M.-A., MarionElectromagnetic actuator to reduce vibration sources Thibaut Chailloux* , L. Morel* , F. Sixdenier In order to improve passenger comfort, a reduction of vibration sources in vehicles is being considered

  4. Electromechanical properties of thin strip piezoelectric vibrators at high frequency

    E-Print Network [OSTI]

    Cao, Wenwu

    an equivalent circuit by application of network theory. The Mason equivalent circuit, shown in Fig. 1 for a oneElectromechanical properties of thin strip piezoelectric vibrators at high frequency Timothy Ritter the electromechanical properties of high frequency 20 MHz piezoelectric strip vibrators. A nonlinear regression

  5. Imaging photorefractive optical vibration measurement method and device

    DOE Patents [OSTI]

    Telschow, Kenneth L. (Idaho Falls, ID); Deason, Vance A. (Idaho Falls, ID); Hale, Thomas C. (Los Alamos, NM)

    2000-01-01T23:59:59.000Z

    A method and apparatus are disclosed for characterizing a vibrating image of an object of interest. The method includes providing a sensing media having a detection resolution within a limited bandwidth and providing an object of interest having a vibrating medium. Two or more wavefronts are provided, with at least one of the wavefronts being modulated by interacting the one wavefront with the vibrating medium of the object of interest. The another wavefront is modulated such that the difference frequency between the one wavefront and the another wavefront is within a response range of the sensing media. The modulated one wavefront and another wavefront are combined in association with the sensing media to interfere and produce simultaneous vibration measurements that are distributed over the object so as to provide an image of the vibrating medium. The image has an output intensity that is substantially linear with small physical variations within the vibrating medium. Furthermore, the method includes detecting the image. In one implementation, the apparatus comprises a vibration spectrum analyzer having an emitter, a modulator, sensing media and a detector configured so as to realize such method. According to another implementation, the apparatus comprises a vibration imaging device.

  6. ME 355K Engineering Vibrations ABET EC2000 syllabus

    E-Print Network [OSTI]

    Ben-Yakar, Adela

    of contemporary issues in engineering practice, including economic, social, political, and environmental issues. Apply principles of engineering, basic science, and mathematics (including multivariate calculusME 355K ­ Engineering Vibrations Page 1 ABET EC2000 syllabus ME 355K ­ Engineering Vibrations

  7. Pushing The Sample-Size Limit Of Infrared Vibrational Nano-Spectroscop...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    The Sample-Size Limit Of Infrared Vibrational Nano-Spectroscopy: From Monolayer Towards Single molecule sensitivity. Pushing The Sample-Size Limit Of Infrared Vibrational...

  8. THE EFFECT OF VIBRATIONAL EXCITATION ON THE DYNAMICS OF ION-MOLECULE REACTIONS

    E-Print Network [OSTI]

    Anderson, S.L.

    2010-01-01T23:59:59.000Z

    Molecular Research Division THE/EFFECT OF VIBRATIONAL EXCITATION ON THE DYNAMICSmolecular charge transfer. 'J i THE EFFECT OF VIBRATIONAL EXCITATION ON THE DYNAMICS

  9. Viewing device for electron-beam equipment

    SciTech Connect (OSTI)

    Nasyrov, R.S.

    1985-06-01T23:59:59.000Z

    Viewing devices are used to observe melting, welding, and so on in vacuum systems, an it is necessary to protect the windows from droplets and vapor. A viewing device for electron-beam equipment is described in which the viewing tube and mounting flange are made as a tubular ball joint enclosed in a steel bellows, which render the viewing device flexible. Bending the viewing tube in the intervals between observations protects the viewing window from sputtering and from drops of molten metal.

  10. Characterization of the Virgo Seismic Environment

    E-Print Network [OSTI]

    The Virgo Collaboration; T. Accadia; F. Acernese; P. Astone; G. Ballardin; F. Barone; M. Barsuglia; A. Basti; Th. S. Bauer; M. Bebronne; M. G. Beker; A. Belletoile; M. Bitossi; M. A. Bizouard; M. Blom; F. Bondu; L. Bonelli; R. Bonnand; V. Boschi; L. Bosi; B. Bouhou; S. Braccini; C. Bradaschia; M. Branchesi; T. Briant; A. Brillet; V. Brisson; T. Bulik; H. J. Bulten; D. Buskulic; C. Buy; G. Cagnoli; E. Calloni; B. Canuel; F. Carbognani; F. Cavalier; R. Cavalieri; G. Cella; E. Cesarini; O. Chaibi; E. Chassande-Mottin; A. Chincarini; A. Chiummo; F. Cleva; E. Coccia; P. -F. Cohadon; C. N. Colacino; J. Colas; A. Colla; M. Colombini; A. Conte; M. Coughlin; J. -P. Coulon; E. Cuoco; S. DAntonio; V. Dattilo; M. Davier; R. Day; R. De Rosa; G. Debreczeni; W. Del Pozzo; M. del Prete; L. Di Fiore; A. Di Lieto; M. Di Paolo Emilio; A. Di Virgilio; A. Dietz; M. Drago; G. Endroczi; V. Fafone; I. Ferrante; F. Fidecaro; I. Fiori; R. Flaminio; L. A. Forte; J. -D. Fournier; J. Franc; S. Frasca; F. Frasconi; M. Galimberti; L. Gammaitoni; F. Garufi; M. E. Gaspar; G. Gemme; E. Genin; A. Gennai; A. Giazotto; R. Gouaty; M. Granata; C. Greverie; G. M. Guidi; J. -F. Hayau; A. Heidmann; H. Heitmann; P. Hello; P. Jaranowski; I. Kowalska; A. Krolak; N. Leroy; N. Letendre; T. G. F. Li; N. Liguori; M. Lorenzini; V. Loriette; G. Losurdo; E. Majorana; I. Maksimovic; N. Man; M. Mantovani; F. Marchesoni; F. Marion; J. Marque; F. Martelli; A. Masserot; C. Michel; L. Milano; Y. Minenkov; M. Mohan; N. Morgado; A. Morgia; S. Mosca; B. Mours; L. Naticchioni; F. Nocera; G. Pagliaroli; L. Palladino; C. Palomba; F. Paoletti; M. Parisi; A. Pasqualetti; R. Passaquieti; D. Passuello; G. Persichetti; F. Piergiovanni; M. Pietka; L. Pinard; R. Poggiani; M. Prato; G. A. Prodi; M. Punturo; P. Puppo; D. S. Rabeling; I. Racz; P. Rapagnani; V. Re; T. Regimbau; F. Ricci; F. Robinet; A. Rocchi; L. Rolland; R. Romano; D. Rosinska; P. Ruggi; B. Sassolas; D. Sentenac; L. Sperandio; R. Sturani; B. Swinkels; M. Tacca; L. Taffarello; A. Toncelli; M. Tonelli; O. Torre; E. Tournefier; F. Travasso; G. Vajente; J. F. J. van den Brand; C. Van Den Broeck; S. van der Putten; M. Vasuth; M. Vavoulidis; G. Vedovato; D. Verkindt; F. Vetrano; A. Vicere; J. -Y. Vinet; S. Vitale; H. Vocca; R. L. Ward; M. Was; M. Yvert; A. Zadrozny; J. -P. Zendri

    2011-08-08T23:59:59.000Z

    The Virgo gravitational wave detector is an interferometer (ITF) with 3km arms located in Pisa, Italy. From July to October 2010, Virgo performed its third science run (VSR3) in coincidence with the LIGO detectors. Despite several techniques adopted to isolate the interferometer from the environment, seismic noise remains an important issue for Virgo. Vibrations produced by the detector infrastructure (such as air conditioning units, water chillers/heaters, pumps) are found to affect Virgo's sensitivity, with the main coupling mechanisms being through beam jitter and scattered light processes. The Advanced Virgo (AdV) design seeks to reduce ITF couplings to environmental noise by having most vibration-sensitive components suspended and in-vacuum, as well as muffle and relocate loud machines. During the months of June and July 2010, a Guralp-3TD seismometer was stationed at various locations around the Virgo site hosting major infrastructure machines. Seismic data were examined using spectral and coherence analysis with seismic probes close to the detector. The primary aim of this study was to identify noisy machines which seismically affect the ITF environment and thus require mitigation attention. Analyzed machines are located at various distances from the experimental halls, ranging from 10m to 100m. An attempt is made to measure the attenuation of emitted noise at the ITF and correlate it to the distance from the source and to seismic attenuation models in soil.

  11. Reusable vibration resistant integrated circuit mounting socket

    DOE Patents [OSTI]

    Evans, Craig N. (Irwin, PA)

    1995-01-01T23:59:59.000Z

    This invention discloses a novel form of socket for integrated circuits to be mounted on printed circuit boards. The socket uses a novel contact which is fabricated out of a bimetallic strip with a shape which makes the end of the strip move laterally as temperature changes. The end of the strip forms a barb which digs into an integrated circuit lead at normal temperatures and holds it firmly in the contact, preventing loosening and open circuits from vibration. By cooling the contact containing the bimetallic strip the barb end can be made to release so that the integrated circuit lead can be removed from the socket without damage either to the lead or to the socket components.

  12. A vibration model for centrifugal contactors

    SciTech Connect (OSTI)

    Leonard, R.A.; Wasserman, M.O.; Wygmans, D.G.

    1992-11-01T23:59:59.000Z

    Using the transfer matrix method, we created the Excel worksheet ``Beam`` for analyzing vibrations in centrifugal contactors. With this worksheet, a user can calculate the first natural frequency of the motor/rotor system for a centrifugal contactor. We determined a typical value for the bearing stiffness (k{sub B}) of a motor after measuring the k{sub B} value for three different motors. The k{sub B} value is an important parameter in this model, but it is not normally available for motors. The assumptions that we made in creating the Beam worksheet were verified by comparing the calculated results with those from a VAX computer program, BEAM IV. The Beam worksheet was applied to several contactor designs for which we have experimental data and found to work well.

  13. FORTE spacecraft vibration mitigation. Final report

    SciTech Connect (OSTI)

    Maly, J.R.

    1996-02-01T23:59:59.000Z

    This report documents work that was performed by CSA Engineering, Inc., for Los Alamos National Laboratory (LANL), to reduce vibrations of the FORTE spacecraft by retrofitting damped structural components into the spacecraft structure. The technical objective of the work was reduction of response at the location of payload components when the structure is subjected to the dynamic loading associated with launch and proto-qualification testing. FORTE is a small satellite that will be placed in orbit in 1996. The structure weighs approximately 425 lb, and is roughly 80 inches high and 40 inches in diameter. It was developed and built by LANL in conjunction with Sandia National Laboratories Albuquerque for the United States Department of Energy. The FORTE primary structure was fabricated primarily with graphite epoxy, using aluminum honeycomb core material for equipment decks and solar panel substrates. Equipment decks were bonded and bolted through aluminum mounting blocks to adjoining structure.

  14. Size separation in vibrated granular matter

    E-Print Network [OSTI]

    A. Kudrolli

    2004-02-06T23:59:59.000Z

    We review recent developments in size separation in vibrated granular materials. Motivated by a need in industry to efficiently handle granular materials and a desire to make fundamental advances in non-equilibrium physics, experimental and theoretical investigations have shown size separation to be a complex phenomena. Large particles in a vibrated granular system invariably rise to the top. However, they may also sink to the bottom, or show other patterns depending on subtle variations in physical conditions. While size ratio is a dominant factor, particle specific properties such as density, inelasticity and friction can play an important role. The nature of the energy input, boundary conditions and interstitial air have been also shown to be significant factors in determining spatial distributions. The presence of convection can enhance mixing or lead to size separation. Experimental techniques including direct visualization and magnetic resonance imaging are being used to investigate these properties. Molecular dynamics and Monte Carlo simulation techniques have been developed to probe size separation. Analytical methods such as kinetic theory are being used to study the interplay between particle size and density in the vibro-fluidized regime, and geometric models have been proposed to describe size separation for deep beds. Besides discussing these studies, we will also review the impact of inelastic collision and friction on the density and velocity distributions to gain a deeper appreciation of the non-equilibrium nature of the system. While a substantial number of studies have been accomplished, considerable work is still required to achieve a firm description of the phenomena.

  15. Wide field of view telescope

    DOE Patents [OSTI]

    Ackermann, Mark R. (Albuquerque, NM); McGraw, John T. (Placitas, NM); Zimmer, Peter C. (Albuquerque, NM)

    2008-01-15T23:59:59.000Z

    A wide field of view telescope having two concave and two convex reflective surfaces, each with an aspheric surface contour, has a flat focal plane array. Each of the primary, secondary, tertiary, and quaternary reflective surfaces are rotationally symmetric about the optical axis. The combination of the reflective surfaces results in a wide field of view in the range of approximately 3.8.degree. to approximately 6.5.degree.. The length of the telescope along the optical axis is approximately equal to or less than the diameter of the largest of the reflective surfaces.

  16. Analysis of wind turbine vibrations based on SCADA data

    E-Print Network [OSTI]

    Andrew Kusiak; Zijun Zhang

    2010-01-01T23:59:59.000Z

    Vibrations of a wind turbine have a negative impact on its performance. Mitigating this undesirable impact requires knowledge of the relationship between the vibrations and other wind turbine parameters that could be potentially modified. Three approaches for ranking the impact importance of measurable turbine parameters on the vibrations of the drive train and the tower are discussed. They include the predictor importance analysis, the global sensitivity analysis, and the correlation coefficient analysis versed in data mining and statistics. To decouple the impact of wind speed on the vibrations of the drive train and the tower, the analysis is performed on data sets with narrow speed ranges. Wavelet analysis is applied to filter noisy accelerometer data. To exclude the impact malfunctions on the vibration analysis, the data are analyzed in a frequency domain. Data-mining algorithms are used to build models with turbine parameters of interest as inputs, and the vibrations of drive train and tower as outputs. The performance of each model is thoroughly evaluated based on metrics widely used in the wind industry. The neural network algorithm outperforms other classifiers and is considered to be the most promising approach to study wind turbine vibrations. ?DOI: 10.1115/1.4001461?

  17. Vibrational Feshbach resonances in near threshold HOCO{sup -} photodetachment: a theoretical study

    SciTech Connect (OSTI)

    Miyabe, Shungo; Haxton, Dan; Lawler, Keith; Orel, Ann; McCurdy, Bill; Rescigno, Tom

    2011-03-02T23:59:59.000Z

    The results of a theoretical study of HOCO{sup ?} photodetachment are presented, with a view toward understanding the origin of two peaks observed by Lu and Continetti (Phys. Rev. Lett. 99, 113005 (2007)) in the photoelectron kinetic energy spectrum very close to threshold. It is shown that the peaks can be attributed to vibrational Feshbach resonances of dipole-bound trans-HOCO{sup ?}, and not s- and p-wave shape resonances as previously assumed. Fixed-nuclei variational electron-HOCO scattering calculations are used to compute photodetachment cross sections and laboratory-frame photoelectron angular distributions. The calculations show a broad A??(#25;{pi}*)-shape resonance several eV above threshold.

  18. Ecology and environment

    E-Print Network [OSTI]

    Sussex, University of

    Ecology and environment Essentials Courses MSci (Hons) in Ecology and Environment MSci (Hons) in Ecology and Environment (research placement) BSc (Hons) in Ecology and Environment Foundation year for UK for the MSci in Ecology and Environment (research placement): AAA Typical A level offer range for the other

  19. The vibration by analogy of certain trusses, beams and plates

    E-Print Network [OSTI]

    Thompson, Lee Price

    1953-01-01T23:59:59.000Z

    of the positive sense of rotation. In this paper, the torsional vibration equation was replaced by a finite difference equation for the nth node in the form n which was regarded as a statement of Kirchhoff's current law and led to the following equivalent...THE VIBRATION BY ANALOGY OF CERTAIN TRUSSES, THEVI EBR AOENHI A Dissertation By LEE PRICE THOMPSON Approved as to style and content by: Ciiairman of Committee 6 . . 7 T . Head of Department May 1953 THE VIBRATION BY ANALOGY OF CERTAIN...

  20. Self-ratcheting Stokes drops driven by oblique vibrations

    E-Print Network [OSTI]

    Karin John; Uwe Thiele

    2009-07-07T23:59:59.000Z

    We develop and analyze a minimal hydrodynamic model in the overdamped limit to understand why a drop climbs a smooth homogeneous incline that is harmonically vibrated at an angle different from the substrate normal [Brunet, Eggers and Deegan, Phys. Rev. Lett. 99, 144501 (2007)]. We find that the vibration component orthogonal to the substrate induces a nonlinear (anharmonic) response in the drop shape. This results in an asymmetric response of the drop to the parallel vibration and, in consequence, in the observed net motion. Beside establishing the basic mechanism, we identify scaling laws valid in a broad frequency range and a flow reversal at high frequencies.

  1. Gerotor and bearing system for whirling mass orbital vibrator

    DOE Patents [OSTI]

    Brett, James Ford; Westermark, Robert Victor; Turner Jr., Joey Earl; Lovin, Samuel Scott; Cole, Jack Howard; Myers, Will

    2007-02-27T23:59:59.000Z

    A gerotor and bearing apparatus for a whirling mass orbital vibrator which generates vibration in a borehole. The apparatus includes a gerotor with an inner gear rotated by a shaft having one less lobe than an outer gear. A whirling mass is attached to the shaft. At least one bearing is attached to the shaft so that the bearing engages at least one sleeve. A mechanism is provided to rotate the inner gear, the mass and the bearing in a selected rotational direction in order to cause the mass, the inner gear, and the bearing to backwards whirl in an opposite rotational direction. The backwards whirling mass creates seismic vibrations.

  2. An experimental study of the vibration of modified cantilever plates

    E-Print Network [OSTI]

    Read, James McPherson

    1954-01-01T23:59:59.000Z

    wings and larger sweep angles. For complete vibration and flutter anal- ysis of these components it is necessary that the modes and frequencies of natural vibration be closely established. Flat cantilever plates (I). serve as a good analogy... of the wings for vibration study. The wings, however, are not usually true cantilevers but are fastened along two lines. One of these lines is along the skin of the fuselage and the other is along the center line of the craft. JL moment is applied...

  3. Airbus Toulouse Flight test data centre. Diagnosis and treatment of noisy vibration flight test data.

    E-Print Network [OSTI]

    Dobigeon, Nicolas

    Airbus Toulouse ­ Flight test data centre. Diagnosis and treatment of noisy vibration flight test data. The trainee will work within flight test vibration analysis team.The main missions and activities on flight test vibration data; - Implement and test in LMS Test.Lab (vibration data processing software

  4. Input a journal Viewing Journals

    E-Print Network [OSTI]

    Sussex, University of

    Journals Contents: Input a journal Viewing Journals Deleting a journal Entering jnl into different period Problems Input a journal 1 Login to Bluqube 2 Select 3 Enter relevant Doc type To select the number of journals you will processing & the total credit value 6 Click on 7 Enter brief description 8

  5. View

    E-Print Network [OSTI]

    2006-02-28T23:59:59.000Z

    Feb 28, 2006 ... For defining the NSO functions composing the battery, we consider two categories: – randomly generated functions, either defined as the ...

  6. View

    E-Print Network [OSTI]

    2008-07-07T23:59:59.000Z

    a battery of benchmark instances of up to 200 nodes are reported. These seem to be the largest instances that have been solved exactly for this problem.

  7. View

    E-Print Network [OSTI]

    2011-06-21T23:59:59.000Z

    May 14, 2010 ... Generally, even testing whether a matrix is in C? is co-NP-complete [23]. ...... One concrete example is the following: ?. ?. ?. ?. ?. ?. 1 1/3 1/3 ...

  8. View

    E-Print Network [OSTI]

    2013-10-14T23:59:59.000Z

    based on median finding, variable fixing, and secant techniques. Keywords: ..... arithmetic operations, the overall complexity is O(n2). D. The worst case bound in ..... always work on its rated clock speed, we turned force the Linux system to use the ..... dimensionally equidistributed uniform pseudo-random number generator.

  9. View

    E-Print Network [OSTI]

    1910-31-00T23:59:59.000Z

    Sep 3, 2003 ... Landau (TDGL) equation, the Maxwell equations, and an energy equation ... varying currents and magnetic fields generate thermal energy, ...

  10. View

    E-Print Network [OSTI]

    2013-11-05T23:59:59.000Z

    Approach. ?. Selin Damla Ahipasao?glu the date of receipt and acceptance should be .... which has the minimum volume is a natural choice from both theoretical and ... This problem has important applications in statistics and solving this prob- ...... the SDPT3 algorithm using the CVX platform on MATLAB, which is a classic.

  11. View

    E-Print Network [OSTI]

    2010-08-12T23:59:59.000Z

    all real solutions of a given system of polynomial equations. ... A crucial ingredient is a semidefinite characterization of the real radical ideal ...... The options.

  12. View

    E-Print Network [OSTI]

    2004-12-25T23:59:59.000Z

    Let fbe a meromorphic function satisfying condition (1.2), and let rj be a sequence with property (2.5). Then the set S is finite and for some subsequence of ...

  13. View

    E-Print Network [OSTI]

    2010-07-30T23:59:59.000Z

    project of the classification of (simple) nuclear separable C*-algebras [E]. Let C? denote the category of separable C*-algebras and ?-homomorphisms.

  14. View

    E-Print Network [OSTI]

    2006-07-11T23:59:59.000Z

    the classification results of Kirchberg and Phillips using the notion of nuclear absorbing ... A simple purely infinite nuclear separable C*-algebra is called.

  15. View

    E-Print Network [OSTI]

    2008-12-16T23:59:59.000Z

    The aim of this paper is to give a survey of some basic theory of semi-infinite programming. .... operations of addition and multiplication by a scalar. We associate ...

  16. Nonlinear Optimal Control Techniques for Vibration Attenuation Using Magnetostrictive Actuators

    E-Print Network [OSTI]

    of vibrations in aeronautic, aerospace, automotive, and industrial systems constitutes a fundamental component compounds, and shape memory alloys (SMA) -- have emerged as viable alternatives for both passive and active

  17. Orientational relaxation and vibrational excitation transfer in methanolcarbon tetrachloride solutions

    E-Print Network [OSTI]

    Fayer, Michael D.

    Orientational relaxation and vibrational excitation transfer in methanol­carbon tetrachloride spectroscopy of the hydroxyl stretch of methanol in carbon tetrachloride solutions to study orientational excitation transfer. For concentrated methanol in carbon tetrachloride solu- tions, like those used

  18. Vortex-induced vibration of slender structures in unsteady flow

    E-Print Network [OSTI]

    Liao, Jung-Chi, 1971-

    2002-01-01T23:59:59.000Z

    Vortex-induced vibration (VIV) results in fatigue damage of offshore oil exploration and production structures. In recent years, the offshore industry has begun to employ curved slender structures such as steel catenary ...

  19. Active vibration cancellation of tonal disturbance using orthogonal eigenstructure control

    E-Print Network [OSTI]

    Rastgaar Aagaah, Mohammad

    Orthogonal Eigenstructure Control (OEC) is a novel control method that can be used for active vibration cancellation. OEC is an output feedback control method applicable to multiple-input, multiple-output linear systems. ...

  20. Vibration Isolation of a Locomotive Mounted Energy Storage Flywheel

    E-Print Network [OSTI]

    Zhang, Xiaohua

    2011-02-22T23:59:59.000Z

    Utilizing flywheels to store and reuse energy from regenerative braking on locomotives is a new technology being developed in the Vibration Control and Electromechanics Lab at Texas A&M. This thesis focuses on the motion analysis of a locomotive...

  1. A preferential vibration dissociation coupling model for nonequilibrium hypersonic flowfields

    E-Print Network [OSTI]

    McGough, David Earl

    1993-01-01T23:59:59.000Z

    A preferential vibration-dissociation coupling model is incorporated into a radiatively coupled viscous shock layer code that also includes chemical, radiative, and thermal nonequilibrium. Stagnation point flow profiles are obtained for several...

  2. Design and vibration testing of a flexible seal whisker model

    E-Print Network [OSTI]

    Gerber, Christopher D

    2013-01-01T23:59:59.000Z

    Harbor seal whiskers have a unique surface structure that dramatically reduces vortex induced vibrations as they move through the water. Concurrently with rigid whisker experiments, this project focuses on the design and ...

  3. Spectroscopy and reactions of vibrationally excited transient molecules

    SciTech Connect (OSTI)

    Dai, H.L. [Univ. of Pennsylvania, Philadelphia (United States)

    1993-12-01T23:59:59.000Z

    Spectroscopy, energy transfer and reactions of vibrationally excited transient molecules are studied through a combination of laser-based excitation techniques and efficient detection of emission from the energized molecules with frequency and time resolution. Specifically, a Time-resolved Fourier Transform Emission Spectroscopy technique has been developed for detecting dispersed laser-induced fluorescence in the IR, visible and UV regions. The structure and spectroscopy of the excited vibrational levels in the electronic ground state, as well as energy relaxation and reactions induced by specific vibronic excitations of a transient molecule can be characterized from time-resolved dispersed fluorescence in the visible and UV region. IR emissions from highly vibrational excited levels, on the other hand, reveal the pathways and rates of collision induced vibrational energy transfer.

  4. Modeling and design of a MEMS piezoelectric vibration energy harvester

    E-Print Network [OSTI]

    Du Toit, Noël Eduard

    2005-01-01T23:59:59.000Z

    The modeling and design of MEMS-scale piezoelectric-based vibration energy harvesters (MPVEH) are presented. The work is motivated by the need for pervasive and limitless power for wireless sensor nodes that have application ...

  5. attached vibrational probe: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the site energy of the acceptor chromophore is lower than that of the donor. Jason D. Biggs; Jeffrey A. Cina 2009-10-12 34 Model-Based Vibration Suppression in Piezoelectric Tube...

  6. Order preserving vibrating strings and applications to Electrodynamics and

    E-Print Network [OSTI]

    Brenier, Yann

    time. It has been advertised as a possible model for dark energy [GKMP]. From a mathematical point specifically to its shallow water version. Then, each vibrating string can be interpreted as a magnetic line

  7. Good vibrations give electrons excitations that rock an insulator...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    online issue of Nature. "We proved that phonons-the vibrations of the atoms-provide the driving force that stabilizes the metal phase when the material is heated," said John...

  8. Vibration Isolation of a Locomotive Mounted Energy Storage Flywheel 

    E-Print Network [OSTI]

    Zhang, Xiaohua

    2011-02-22T23:59:59.000Z

    Utilizing flywheels to store and reuse energy from regenerative braking on locomotives is a new technology being developed in the Vibration Control and Electromechanics Lab at Texas A&M. This thesis focuses on the motion ...

  9. Element and system design for active and passive vibration isolation

    E-Print Network [OSTI]

    Zuo, Lei, 1974-

    2005-01-01T23:59:59.000Z

    This thesis focusses on broadband vibration isolation, with an emphasis on control of absolute payload motion for ultra-precision instruments such as the MIT/Caltech Laser-Interferometric Gravitational Wave Observatory ...

  10. Magnetic induction systems to harvest energy from mechanical vibrations

    E-Print Network [OSTI]

    Jonnalagadda, Aparna S

    2007-01-01T23:59:59.000Z

    This thesis documents the design process for magnetic induction systems to harvest energy from mechanical vibrations. Two styles of magnetic induction systems - magnet-through-coil and magnet-across-coils - were analyzed. ...

  11. Energy harvesting from wind-induced vibration of suspension bridges

    E-Print Network [OSTI]

    Shi, Miao, M. Eng. Massachusetts Institute of Technology

    2013-01-01T23:59:59.000Z

    Recently, an extensive amount of research has been focused on energy harvesting from structural vibration sources for wireless self-powered microsystem applications. One method of energy harvesting is using electromagnetic ...

  12. An experimental study of torsional vibration measurement / b

    E-Print Network [OSTI]

    French, Robert Sheldon

    1981-01-01T23:59:59.000Z

    AN EXPERIMENTAL STUDY OF TORSIONAL VIBRATION MEASUREMENT A Thesis by ROBERT SHELDON FRENCH Submitted to the Graduate College of Texas A&M Uniuersity in partial fulfillment of the requirement of the degree of MASTER OF SCIENCE August 1981... biajor Subject: Mechanical Engineering AN EXPERIMENTAL STUDY OF TORSIONAL VIBRATION MEASUREMENT A Thesis by ROBERT SHELDON FRENCH Approved as to style and content by: , ' (Chairman of Committee) (Mem ) ( er) (Member) (H d of Department) August...

  13. Harsh environments electronics : downhole applications.

    SciTech Connect (OSTI)

    Vianco, Paul Thomas

    2011-03-01T23:59:59.000Z

    The development and operational sustainment of renewable (geothermal) and non-renewable (fossil fuel) energy resources will be accompanied by increasingly higher costs factors: exploration and site preparation, operational maintenance and repair. Increased government oversight in the wake of the Gulf oil spill will only add to the cost burden. It is important to understand that downhole conditions are not just about elevated temperatures. It is often construed that military electronics are exposed to the upper limit in terms of extreme service environments. Probably the harshest of all service conditions for electronics and electrical equipment are those in oil, gas, and geothermal wells. From the technology perspective, advanced materials, sensors, and microelectronics devices are benefificial to the exploration and sustainment of energy resources, especially in terms of lower costs. Besides the need for the science that creates these breakthroughs - there is also a need for sustained engineering development and testing. Downhole oil, gas, and geothermal well applications can have a wide range of environments and reliability requirements: Temperature, Pressure, Vibration, Corrosion, and Service duration. All too frequently, these conditions are not well-defifined because the application is labeled as 'high temperature'. This ambiguity is problematic when the investigation turns to new approaches for electronic packaging solutions. The objective is to develop harsh environment, electronic packaging that meets customer requirements of cost, performance, and reliability. There are a number of challenges: (1) Materials sets - solder alloys, substrate materials; (2) Manufacturing process - low to middle volumes, low defect counts, new equipment technologies; and (3) Reliability testing - requirements documents, test methods and modeling, relevant standards documents. The cost to develop and sustain renewable and non-renewable energy resources will continue to escalate within the industry. Downhole electronics can provide a very cost-effective approach for well exploration and sustainment (data logging). However, the harsh environments are a 'game-changer' in terms defining materials, assembly processes and the long-term reliability of downhole electronic systems. The system-level approach will enable the integration of each of these contributors - materials, processes, and reliability - in order to deliver cost-effective electronics that meet customer requirements.

  14. Seventh international conference on time-resolved vibrational spectroscopy

    SciTech Connect (OSTI)

    Dyer, R.B.; Martinez, M.A.D.; Shreve, A.; Woodruff, W.H. [comps.

    1997-04-01T23:59:59.000Z

    The International Conference on Time-Resolved Vibrational Spectroscopy (TRVS) is widely recognized as the major international forum for the discussion of advances in this rapidly growing field. The 1995 conference was the seventh in a series that began at Lake Placid, New York, 1982. Santa Fe, New Mexico, was the site of the Seventh International Conference on Time-Resolved Vibrational Spectroscopy, held from June 11 to 16, 1995. TRVS-7 was attended by 157 participants from 16 countries and 85 institutions, and research ranging across the full breadth of the field of time-resolved vibrational spectroscopy was presented. Advances in both experimental capabilities for time-resolved vibrational measurements and in theoretical descriptions of time-resolved vibrational methods continue to occur, and several sessions of the conference were devoted to discussion of these advances and the associated new directions in TRVS. Continuing the interdisciplinary tradition of the TRVS meetings, applications of time-resolved vibrational methods to problems in physics, biology, materials science, and chemistry comprised a large portion of the papers presented at the conference.

  15. Vibration monitoring of EDF rotating machinery using artificial neural networks

    SciTech Connect (OSTI)

    Alguindigue, I.E.; Loskiewicz-Buczak, A.; Uhrig, R.E. (Tennessee Univ., Knoxville, TN (United States). Dept. of Nuclear Engineering); Hamon, L.; Lefevre, F. (Electricite de France, 78 - Chatou (France). Direction des Etudes et Recherches)

    1991-01-01T23:59:59.000Z

    Vibration monitoring of components in nuclear power plants has been used for a number of years. This technique involves the analysis of vibration data coming from vital components of the plant to detect features which reflect the operational state of machinery. The analysis leads to the identification of potential failures and their causes, and makes it possible to perform efficient preventive maintenance. Earlydetection is important because it can decrease the probability of catastrophic failures, reduce forced outgage, maximize utilization of available assets, increase the life of the plant, and reduce maintenance costs. This paper documents our work on the design of a vibration monitoring methodology based on neural network technology. This technology provides an attractive complement to traditional vibration analysis because of the potential of neural networks to operate in real-time mode and to handle data which may be distorted or noisy. Our efforts have been concentrated on the analysis and classification of vibration signatures collected by Electricite de France (EDF). Two neural networks algorithms were used in our project: the Recirculation algorithm and the Backpropagation algorithm. Although this project is in the early stages of development it indicates that neural networks may provide a viable methodology for monitoring and diagnostics of vibrating components. Our results are very encouraging.

  16. Vibration monitoring of EDF rotating machinery using artificial neural networks

    SciTech Connect (OSTI)

    Alguindigue, I.E.; Loskiewicz-Buczak, A.; Uhrig, R.E. [Tennessee Univ., Knoxville, TN (United States). Dept. of Nuclear Engineering; Hamon, L.; Lefevre, F. [Electricite de France, 78 - Chatou (France). Direction des Etudes et Recherches

    1991-12-31T23:59:59.000Z

    Vibration monitoring of components in nuclear power plants has been used for a number of years. This technique involves the analysis of vibration data coming from vital components of the plant to detect features which reflect the operational state of machinery. The analysis leads to the identification of potential failures and their causes, and makes it possible to perform efficient preventive maintenance. Earlydetection is important because it can decrease the probability of catastrophic failures, reduce forced outgage, maximize utilization of available assets, increase the life of the plant, and reduce maintenance costs. This paper documents our work on the design of a vibration monitoring methodology based on neural network technology. This technology provides an attractive complement to traditional vibration analysis because of the potential of neural networks to operate in real-time mode and to handle data which may be distorted or noisy. Our efforts have been concentrated on the analysis and classification of vibration signatures collected by Electricite de France (EDF). Two neural networks algorithms were used in our project: the Recirculation algorithm and the Backpropagation algorithm. Although this project is in the early stages of development it indicates that neural networks may provide a viable methodology for monitoring and diagnostics of vibrating components. Our results are very encouraging.

  17. Views of the solar system

    SciTech Connect (OSTI)

    Hamilton, C.

    1995-02-01T23:59:59.000Z

    Views of the Solar System has been created as an educational tour of the solar system. It contains images and information about the Sun, planets, moons, asteroids and comets found within the solar system. The image processing for many of the images was done by the author. This tour uses hypertext to allow space travel by simply clicking on a desired planet. This causes information and images about the planet to appear on screen. While on a planet page, hyperlinks travel to pages about the moons and other relevant available resources. Unusual terms are linked to and defined in the Glossary page. Statistical information of the planets and satellites can be browsed through lists sorted by name, radius and distance. History of Space Exploration contains information about rocket history, early astronauts, space missions, spacecraft and detailed chronology tables of space exploration. The Table of Contents page has links to all of the various pages within Views Of the Solar System.

  18. For current viewing resistor loads

    DOE Patents [OSTI]

    Lyons, Gregory R. (Tijeras, NM); Hass, Jay B. (Lee's Summit, MO)

    2011-04-19T23:59:59.000Z

    The invention comprises a terminal unit for a flat cable comprising a BNC-PCB connector having a pin for electrically contacting one or more conducting elements of a flat cable, and a current viewing resistor having an opening through which the pin extends and having a resistor face that abuts a connector face of the BNC-PCB connector, wherein the device is a terminal unit for the flat cable.

  19. Peri-prosthetic fracture vibration testing

    SciTech Connect (OSTI)

    Cruce, Jesse R [Los Alamos National Laboratory; Erwin, Jenny R [Los Alamos National Laboratory; Remick, Kevin R [Los Alamos National Laboratory; Cornwell, Phillip J [Los Alamos National Laboratory; Menegini, R. Michael [INDIANA UNIV.; Racanelli, Joe [STRYKER ORTHOPAEDICS

    2011-01-28T23:59:59.000Z

    The purpose of this study is to establish a test setup and vibration analysis method to predict femoral stem seating and prevent bone fracture using accelerometer or force response data from an instrument stem and impactor. This study builds upon earlier studies to identify a means to supplement a surgeon's tactile and auditory senses by using damage identification techniques normally used for civil and mechanical structures. Testing will be conducted using foam cortical shell sawbones prepared for stems of different geometries. Each stem will be instrumented with an accelerometer. Two impactor designs will be compared: a monolithic impactor with an integrated load cell and accelerometer and a two piece impactor. Acceleration and force measurements will be taken in the direction of impaction. Signal processing techniques will be applied to the acceleration time histories to determine features that can be used to assess device seating and potential fracture. A consistent energy input will be applied using a drop tower. The effect of introducing compliance under the bone support vise will also be investigated. The ultimate goal of this study is to design an integrated portable data acquisition system capable of being used in future cadaveric testing. This paper will discuss the experimental set-up, the signal processing techniques used and the subsequent results.

  20. UNDERGRADUATE DEGREES 2015 ENVIRONMENT

    E-Print Network [OSTI]

    COME AND YOUR F I N D PLACE UNDERGRADUATE DEGREES 2015 EARTH and ENVIRONMENT #12;| CONTENTS | www OF EARTH AND ENVIRONMENT Why study earth and environment at Leeds? 2 Why study an earth science course? 4 Why study an environment course? 8 Choosing the right degree 12 Four-year industrial degrees (BA

  1. Hydrogen local vibrational modes in semiconductors

    SciTech Connect (OSTI)

    McCluskey, M D [Univ. of California, Berkeley, CA (United States). Dept. of Physics

    1997-06-01T23:59:59.000Z

    Following, a review of experimental techniques, theory, and previous work, the results of local vibrational mode (LVM) spectroscopy on hydrogen-related complexes in several different semiconductors are discussed. Hydrogen is introduced either by annealing in a hydrogen ambient. exposure to a hydrogen plasma, or during growth. The hydrogen passivates donors and acceptors in semiconductors, forming neutral complexes. When deuterium is substituted for hydrogen. the frequency of the LVM decreases by approximately the square root of two. By varying the temperature and pressure of the samples, the microscopic structures of hydrogen-related complexes are determined. For group II acceptor-hydrogen complexes in GaAs, InP, and GaP, hydrogen binds to the host anion in a bond-centered orientation, along the [111] direction, adjacent to the acceptor. The temperature dependent shift of the LVMs are proportional to the lattice thermal energy U(T), a consequence of anharmonic coupling between the LVM and acoustical phonons. In the wide band gap semiconductor ZnSe, epilayers grown by metalorganic chemical vapor phase epitaxy (MOCVD) and doped with As form As-H complexes. The hydrogen assumes a bond-centered orientation, adjacent to a host Zn. In AlSb, the DX centers Se and Te are passivated by hydrogen. The second, third, and fourth harmonics of the wag modes are observed. Although the Se-D complex has only one stretch mode, the Se-H stretch mode splits into three peaks. The anomalous splitting is explained by a new interaction between the stretch LVM and multi-phonon modes of the lattice. As the temperature or pressure is varied, and anti-crossing is observed between LVM and phonon modes.

  2. On the Consistency of Approximate Quantum Dynamics Simulation Methods for Vibrational Spectra in the Condensed Phase

    E-Print Network [OSTI]

    Rossi, Mariana; Paesani, Francesco; Bowman, Joel; Ceriotti, Michele

    2014-01-01T23:59:59.000Z

    Including quantum mechanical effects on the dynamics of nuclei in the condensed phase is challenging, because the complexity of exact methods grows exponentially with the number of quantum degrees of freedom. Efforts to circumvent these limitations can be traced down to two approaches: methods that treat a small subset of the degrees of freedom with rigorous quantum mechanics, considering the rest of the system as a static or classical environment, and methods that treat the whole system quantum mechanically, but using approximate dynamics. Here we perform a systematic comparison between these two philosophies for the description of quantum effects in vibrational spectroscopy, taking the Embedded Local Monomer (LMon) model and a mixed quantum-classical (MQC) model as representatives of the first family of methods, and centroid molecular dynamics (CMD) and thermostatted ring polymer molecular dynamics (TRPMD) as examples of the latter. We use as benchmarks D$_2$O doped with HOD and pure H$_2$O at three distinc...

  3. Defining the Problem Known Environment Unknown Environment Improvements Reinforcement Learning

    E-Print Network [OSTI]

    Kjellström, Hedvig

    Defining the Problem Known Environment Unknown Environment Improvements Reinforcement Learning Bel¨oningsbaserad Inl¨arning Defining the Problem Known Environment Unknown Environment Improvements 1 Defining the Problem Framework Role of Reward Simplifying Assumptions Central Concepts 2 Known Environment Bellmans

  4. ParaView at NERSC

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeeding access toTestPhysics LabInterconnection RiskMarch StudyParaView

  5. Chisolm View | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia:PowerCER.png El CER esDataset Country ChileDialogue,China:Chisolm View

  6. Measurement of rabbit eardrum vibration through stroboscopic digital holography

    SciTech Connect (OSTI)

    De Greef, Daniël; Dirckx, Joris J. J. [University of Antwerp, Laboratory of BioMedical Physics, Groenenborgerlaan 171, B-2020 Antwerp (Belgium)

    2014-05-27T23:59:59.000Z

    In this work, we present a setup for high-power single shot stroboscopic digital holography and demonstrate it in an application on rabbit eardrum vibration measurement. The setup is able to make full-field time-resolved measurements of vibrating surfaces with a precision in the nanometer range in a broad frequency range. The height displacement of the measured object is visualized over the entire surface as a function of time. Vibration magnitude and phase maps can be extracted from these data, the latter proving to be very useful to reveal phase delays across the surface. Such deviations from modal motion indicate energy losses due to internal damping, in contrast to purely elastic mechanics. This is of great interest in middle ear mechanics and finite element modelling. In our setup, short laser pulses are fired at selected instants within the surface vibration period and are recorded by a CCD camera. The timing of the pulses and the exposure of the camera are synchronized to the vibration phase by a microprocessor. The high-power frequency-doubled Nd:YAG laser produces pulses containing up to 5 mJ of energy, which is amply sufficient to record single-shot holograms. As the laser pulse length is 8 ns and the smallest time step of the trigger electronics is 1 ?s, vibration measurements of frequencies up to 250 kHz are achievable through this method, provided that the maximum vibration amplitude exceeds a few nanometers. In our application, middle ear mechanics, measuring frequencies extend from 5 Hz to 20 kHz. The experimental setup will be presented, as well as results of measurements on a stretched circular rubber membrane and a rabbit's eardrum. Two of the challenges when measuring biological tissues, such as the eardrum, are low reflectivity and fast dehydration. To increase reflectivity, a coating is applied and to counteract the undesirable effects of tissue dehydration, the measurement setup and software have been optimized for speed without compromising on the quality. Results of a repeatability test will be presented as well. Since the method measures the membrane motion as a function of time in small time steps, we do not only measure vibration amplitude like in time-average holography, but we can also measure non-linear elastic and transient behaviour. In conclusion, the combination of good spatial, depth and time resolution with the fast data acquisition and very wide frequency range make our technique applicable in a number of fields, including biological tissue vibrations.

  7. Ground control failures. A pictorial view of case studies

    SciTech Connect (OSTI)

    Peng, S.S.

    2007-07-01T23:59:59.000Z

    The book shows, in pictorial views, many forms and/or stages of types of failures in mines, for instance, cutter, roof falls, and cribs. In each case, the year of occurrence is stated in the beginning so that the environment or technological background under which it occurred are reflected. The narrative than begins with the mining and geological conditions, followed by a description of the ground control problems and recommended solutions and results, if any. The sections cover failure of pillars, roof falls, longwall, roof bolting, multiple-seam mining, floor heave, longwall, flooding and weathering of coal, old workings, and shortwall and thin-seam plow longwall.

  8. Coherent exciton dynamics in the presence of underdamped vibrations

    E-Print Network [OSTI]

    Arend G. Dijkstra; Chen Wang; Jianshu Cao; Graham R. Fleming

    2014-12-22T23:59:59.000Z

    Recent ultrafast optical experiments show that excitons in large biological light-harvesting complexes are coupled to molecular vibration modes. These high-frequency vibrations will not only affect the optical response, but also drive the exciton transport. Here, using a model dimer system, the frequency of the underdamped vibration is shown to have a strong effect on the exciton dynamics such that quantum coherent oscillations in the system can be present even in the case of strong noise. Two mechanisms are identified to be responsible for the enhanced transport efficiency: critical damping due to the tunable effective strength of the coupling to the bath, and resonance coupling where the vibrational frequency coincides with the energy gap in the system. The interplay of these two mechanisms determines parameters responsible for the most efficient transport, and these optimal control parameters are comparable to those in realistic light-harvesting complexes. Interestingly, oscillations in the excitonic coherence at resonance are suppressed in comparison to the case of an off-resonant vibration.

  9. Energy harvesting of random wide-band vibrations with applications to an electro-magnetic rotational energy harvester

    E-Print Network [OSTI]

    Trimble, A. Zachary

    2011-01-01T23:59:59.000Z

    In general, vibration energy harvesting is the scavenging of ambient vibration by transduction of mechanical kinetic energy into electrical energy. Many mechanical or electro-mechanical systems produce mechanical vibrations. ...

  10. Better Buildings Network View | March 2015 | Department of Energy

    Energy Savers [EERE]

    Better Buildings Network View | March 2015 Better Buildings Network View | March 2015 The Better Buildings Network View monthly newsletter from the U.S. Department of Energy's...

  11. The Better Buildings Neighborhood View -- December 2013 | Department...

    Office of Environmental Management (EM)

    The Better Buildings Neighborhood View -- December 2013 The Better Buildings Neighborhood View -- December 2013 The Better Buildings Neighborhood View monthly newsletter from the...

  12. Better Buildings Network View | November 2014 | Department of...

    Broader source: Energy.gov (indexed) [DOE]

    November 2014 More Documents & Publications Better Buildings Network View | July-August 2014 Better Buildings Network View | December 2014 Better Buildings Network View | January...

  13. The Better Buildings Neighborhood View - August 2012 | Department...

    Energy Savers [EERE]

    The Better Buildings Neighborhood View - August 2012 The Better Buildings Neighborhood View - August 2012 The Better Buildings Neighborhood View monthly newsletter from the U.S....

  14. Scaling of convective velocity in a vertically vibrated granular bed

    E-Print Network [OSTI]

    Tomoya M. Yamada; Hiroaki Katsuragi

    2014-05-30T23:59:59.000Z

    We experimentally study the velocity scaling of granular convection which is a possible mechanism of the regolith migration on the surface of small asteroids. In order to evaluate the contribution of granular convection to the regolith migration, the velocity of granular convection under the microgravity condition has to be revealed. Although it is hard to control the gravitational acceleration in laboratory experiments, scaling relations involving the gravitational effect can be evaluated by systematic experiments. Therefore, we perform such a systematic experiment of the vibration-induced granular convection. From the experimental data, a scaling form for the granular convective velocity is obtained. The obtained scaling form implies that the granular convective velocity can be decomposed into two characteristic velocity components: vibrational and gravitational velocities. In addition, the system size dependence is also scaled. According to the scaling form, the granular convective velocity $v$ depends on the gravitational acceleration $g$ as $v \\propto g^{0.97}$ when the normalized vibrational acceleration is fixed.

  15. Degassing of molten alloys with the assistance of ultrasonic vibration

    DOE Patents [OSTI]

    Han, Qingyou (Knoxville, TN); Xu, Hanbing (Knoxville, TN); Meek, Thomas T. (Knoxville, TN)

    2010-03-23T23:59:59.000Z

    An apparatus and method are disclosed in which ultrasonic vibration is used to assist the degassing of molten metals or metal alloys thereby reducing gas content in the molten metals or alloys. High-intensity ultrasonic vibration is applied to a radiator that creates cavitation bubbles, induces acoustic streaming in the melt, and breaks up purge gas (e.g., argon or nitrogen) which is intentionally introduced in a small amount into the melt in order to collect the cavitation bubbles and to make the cavitation bubbles survive in the melt. The molten metal or alloy in one version of the invention is an aluminum alloy. The ultrasonic vibrations create cavitation bubbles and break up the large purge gas bubbles into small bubbles and disperse the bubbles in the molten metal or alloy more uniformly, resulting in a fast and clean degassing.

  16. Non-linear optical crystal vibration sensing device

    DOE Patents [OSTI]

    Kalibjian, R.

    1994-08-09T23:59:59.000Z

    A non-linear optical crystal vibration sensing device including a photorefractive crystal and a laser is disclosed. The laser produces a coherent light beam which is split by a beam splitter into a first laser beam and a second laser beam. After passing through the crystal the first laser beam is counter-propagated back upon itself by a retro-mirror, creating a third laser beam. The laser beams are modulated, due to the mixing effect within the crystal by vibration of the crystal. In the third laser beam, modulation is stable and such modulation is converted by a photodetector into a usable electrical output, intensity modulated in accordance with vibration applied to the crystal. 3 figs.

  17. Proposal of thermal neutron flux monitors based on vibrating wire

    E-Print Network [OSTI]

    Arutunian, S G; Chung, M; Harutyunyan, G S; Lazareva, E G

    2015-01-01T23:59:59.000Z

    Two types of neutron monitors with fine spatial resolution are proposed based on vibrating wire. In the first type, neutrons interact with the vibrating wire, heat it, and lead to the change of natural frequency, which can be precisely measured. To increase the heat deposition during the neutron scattering, use of gadolinium layer which has the highest thermal neutron capture cross section among all elements is proposed. The second type of the monitor uses vibrating wire as a resonant target. Besides the measurement of beam profile according to the average signal, the differential signal synchronized with the wire oscillations defines the gradient of beam profile. Spatial resolution of the monitor is defined by the diameter of the wire.

  18. Lesson 34a: Environment

    E-Print Network [OSTI]

    Pasifiki [Pacific Ocean] Bahari Aktiki [Arctic Ocean] Bahari ya Mediterani [Mediterranean Sea] Bahari yaLesson 34a: Environment Environment [mazingira] bahari / bahari [ocean / sea / oceans / seas / farms] Bahari [ocean / sea] Bahari Hindi [Indian Ocean] Bahari Atlantiki [Atlantic Ocean] Bahari

  19. Computing environment logbook

    DOE Patents [OSTI]

    Osbourn, Gordon C; Bouchard, Ann M

    2012-09-18T23:59:59.000Z

    A computing environment logbook logs events occurring within a computing environment. The events are displayed as a history of past events within the logbook of the computing environment. The logbook provides search functionality to search through the history of past events to find one or more selected past events, and further, enables an undo of the one or more selected past events.

  20. System and method for damping vibration in a drill string

    DOE Patents [OSTI]

    Wassell, Mark Ellsworth; Turner, William Evans; Burgess, Daniel E; Perry, Carl Allison

    2014-03-04T23:59:59.000Z

    A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

  1. System and method for damping vibration in a drill string

    DOE Patents [OSTI]

    Wassell, Mark Ellsworth (Kingwood, TX); Turner, William Evans (Durham, CT); Burgess, Daniel E. (Middletown, CT); Perry, Carl Allison (Middletown, CT)

    2011-08-16T23:59:59.000Z

    A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

  2. System and method for damping vibration in a drill string

    DOE Patents [OSTI]

    Wassell, Mark Ellsworth (Kingswood, TX); Turner, William Evans (Durham, CT); Burgess, Daniel E. (Middletown, CT); Perry, Carl Allison (Middletown, CT)

    2012-08-14T23:59:59.000Z

    A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

  3. System and method for damping vibration in a drill string

    DOE Patents [OSTI]

    Wassell, Mark Ellsworth (Kingwood, TX); Turner, William Evans (Durham, CT); Burgess, Daniel E. (Middletown, CT); Perry, Carl Allison (Middletown, CT)

    2008-05-27T23:59:59.000Z

    A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

  4. System and method for damping vibration in a drill string

    DOE Patents [OSTI]

    Wassell, Mark Ellsworth (Kingwood, TX); Turner, William Evans (Durham, CT); Burgess, Daniel E. (Middletown, CT); Perry, Carl Allison (Middletown, CT)

    2007-05-22T23:59:59.000Z

    A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

  5. The Effect of Whole Body Horizontal Vibration in Position Sense and Dynamic Stability of the Spine

    E-Print Network [OSTI]

    Lamis, Farhana

    2008-06-09T23:59:59.000Z

    at the 5 Hz frequency. These results would suggest that horizontal vibration may be less of a factor in whole-body vibration induced injuries. This work was supported by University of Kansas Transportation Research Institute Grant Program....

  6. MATLAB implementation of an operational modal analysis technique for vibration-based structural health monitoring

    E-Print Network [OSTI]

    Ojeda, Alejandro P

    2012-01-01T23:59:59.000Z

    Vibration-based structural health monitoring (SHM) has become an attractive solution for the global monitoring and evaluation of damage in structures. Numerous damage detection schemes used in vibration-based SHM require ...

  7. Vibration damping using low-wave-speed media with applications to precision machines

    E-Print Network [OSTI]

    Varanasi, Kripa K. (Kripa Kiran), 1977-

    2004-01-01T23:59:59.000Z

    Vibration and noise are an ever-present problem in the majority of mechanical systems, from consumer products to precision manufacturing systems. But most approaches for vibration suppression are expensive and invasive, ...

  8. Non-intrusive vibration monitoring in US Naval and US Coast Guard ships

    E-Print Network [OSTI]

    Gerhard, Katherine Leigh

    2013-01-01T23:59:59.000Z

    In 2011, the Laboratory for Electromagnetic and Electronic Systems proposed a new type of vibration monitoring system, entitled vibration assessment monitoring point with integrated recovery of energy or VAMPRIE, in their ...

  9. Modeling and Vibration Control with a Nanopositioning Magnetic-Levitation System

    E-Print Network [OSTI]

    Kim, Young Ha

    2012-02-14T23:59:59.000Z

    This dissertation demonstrates that a magnetic-levitation (maglev) stage has the capabilities to control movements and reject vibration simultaneously. The mathematical model and vibration control scheme with a 6-degree-of-freedom (6-DOF) maglev...

  10. Vibration control in plates by uniformly distributed PZT actuators interconnected via electric networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    improve the performances of piezoelectric actuation. internal resonance / equivalent circuits 1Vibration control in plates by uniformly distributed PZT actuators interconnected via electric vibrations of plates by means of a set of electrically-interconnected piezoelectric actuators is described

  11. Optimization of Passive Constrained Layer Damping Treatments for Vibration Control of Cylindrical Shells

    E-Print Network [OSTI]

    Zheng, H.

    This paper presents the layout optimization of passive constrained layer damping (PCLD) treatment for vibration control of cylindrical shells under a broadband force excitation. The equations governing the vibration responses ...

  12. Characterization of a synthetic peroxodiiron(III) protein model complex by nuclear resonance vibrational spectroscopy

    E-Print Network [OSTI]

    Do, Loi Hung

    The vibrational spectrum of an ?[superscript 1],?[superscript 1]-1,2-peroxodiiron(III) complex was measured by nuclear resonance vibrational spectroscopy and fit using an empirical force field analysis. Isotopic 18O2 ...

  13. Cosmology: a bird's eye view

    E-Print Network [OSTI]

    Alan A. Coley; Sigbjorn Hervik; Woei Chet Lim

    2006-05-15T23:59:59.000Z

    In this essay we discuss the difference in views of the Universe as seen by two different observers. While one of the observers follows a geodesic congruence defined by the geometry of the cosmological model, the other observer follows the fluid flow lines of a perfect fluid with a linear equation of state. We point out that the information these observers collect regarding the state of the Universe can be radically different; while one observes a non-inflating ever-expanding ever-lasting universe, the other observer can experience a dynamical behaviour reminiscent to that of quintessence or even that of a phantom cosmology leading to a 'big rip' singularity within finite time (but without the need for exotic forms of matter).

  14. Vibration and crack detection in gas turbine engine compressor blades using Eddy current sensors

    E-Print Network [OSTI]

    Lackner, Matthew, 1980-

    2004-01-01T23:59:59.000Z

    (cont.) in the ECS signal, no definitive method for sensing blade vibration using an ECS has yet been developed.

  15. Minimax design of vibration absorbers for linear damped systems Brandon Brown, Tarunraj Singh

    E-Print Network [OSTI]

    Singh, Tarunraj

    motion of transmission line towers [3]. Since the vibration absorber was introduced in 1909 by Frahm [4

  16. Navigation of a walking robot in natural environments

    E-Print Network [OSTI]

    Portland State University

    Navigation of a walking robot in natural environments Enric Celaya and Josep María Porta Institut de Robòtica i Informàtica Industrial (UPC-CSIC) Abstract The most relevant differences existing between wheeled and legged robots, from the point of view of the expected navigation tasks to be performed

  17. Knowledge and Common Knowledge in a Distributed Environment \\Lambda

    E-Print Network [OSTI]

    Halpern, Joseph Y.

    Knowledge and Common Knowledge in a Distributed Environment \\Lambda Joseph Y. Halpern Yoram Moses role in distributed systems. Indeed, such reasoning is a central part of the informal intuitive arguments used in the design of distributed protocols. Communication in a distributed system can be viewed

  18. Towards the Secure Initialisation of a Personal Distributed Environment

    E-Print Network [OSTI]

    Tomlinson, Allan

    network that takes a user-centric view of per- sonal devices to create a purely virtual personal network, their home, office, car, or personal surround- ings. These devices may be fixed or mobile, and mayTowards the Secure Initialisation of a Personal Distributed Environment Scarlet Schwiderski

  19. Surface Science Letters Surface vibrations of a highly ordered low-density alkanethiol

    E-Print Network [OSTI]

    Sibener, Steven

    ; Surface structure, morphology, roughness, and topography; Vibrations of adsorbed molecules; Gold; LowSurface Science Letters Surface vibrations of a highly ordered low-density alkanethiol monolayer-energy surface vibrational structure of the 11:5 Â p 3 striped phase of 1-decanethiol (C10H21SH) chemi- sorbed

  20. Vibrationally resolved transitions in ion-molecule and atom-molecular ion slow collisions

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The data tables and interactive graphs made available here contain theoretical integral cross sections for vibrational excitation and vibrationally resolved charge transfer from vibrationally excited states of H2 and H2+ with protons and hydrogen atoms, respectively. [From http://www-cfadc.phy.ornl.gov/h2mol/home.html] (Specialized Interface)

  1. Temperature-dependent vibrational relaxation in polyatomic liquids: Picosecond infrared pump-probe experiments

    E-Print Network [OSTI]

    Fayer, Michael D.

    , California 94305 (Received 24 November 1993; accepted 10 March 1994) Vibrational lifetimes of metal carbonyl those in CHCls. A decrease in the vibrational lifetime with temperature is seen for both metal carbonyls a detailed study of the temperature-dependent relax- ation of a vibrational mode of two molecules, tungsten

  2. Vibration Isolation with High Strain Shape Memory Alloy Actuators: Case of the impulse disturbance

    E-Print Network [OSTI]

    Hayward, Vincent

    disturbance, while an active stage is used to aug- ment low frequency damping and provide attenuationVibration Isolation with High Strain Shape Memory Alloy Actuators: Case of the impulse disturbance disturbance on a mass to be isolated from vibrations. The vibration isolation testbed consists of a `strong

  3. Better Buildings Network View | May 2014 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    May 2014 More Documents & Publications Better Buildings Network View | July-August 2014 Better Buildings Network View | June...

  4. Friction-Induced Vibrations in Railway Transportation Chandra Prakash Sharma

    E-Print Network [OSTI]

    Phani, A. Srikantha

    Friction-Induced Vibrations in Railway Transportation by Chandra Prakash Sharma B. Tech., Sardar;Abstract Controlling friction at the wheel-rail interface is indispensable for extending track life implementation of friction modifier system consists of a stick-tube assembly, attached through a bracket which

  5. Vibrational Spectroscopy of Aluminum Nitride Laurie E. McNeil

    E-Print Network [OSTI]

    Rollins, Andrew M.

    Raman and Brillouin scattering, infrared absorption, neutron scattering, and ultrasonics can be used to probe the vibrational spectrum. Although Raman and Brillouin scattering probe only long-wavelength modes, they have the advantage that much smaller crystals are required than for neutron or ultra- sonic studies

  6. Ab Initio Study of Vibrational Dephasing of Electronic Excitations in

    E-Print Network [OSTI]

    Ab Initio Study of Vibrational Dephasing of Electronic Excitations in Semiconducting Carbon Engineering, UniVersity of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan Received May 7, 2007; Revised Manuscript Received August 1, 2007 ABSTRACT Phonon-induced dephasing of electronic transitions

  7. Grinding media oscillation: effect on torsional vibrations in tumble mills

    E-Print Network [OSTI]

    Toram, Kiran Kumar

    2005-11-01T23:59:59.000Z

    of oscillation of grinding media on torsional vibrations of the mill. A theoretical model was developed to determine the oscillating frequency of the grinding media. A 12" (0.3 m) diameter tumble mill test rig was built with a 0.5 hp DC motor. The rig is tested...

  8. Thermally Induced Vibrations of a Solar Wing with Bowed STEM

    E-Print Network [OSTI]

    Hagler, Shawn 1983-

    2010-11-30T23:59:59.000Z

    undergo thermal excitations due to a thermal gradient through the cross-section when entering and exiting solar eclipse. These vibrations can greatly reduce pointing accuracy and lead to mission failure. Boeing obtained a patent in 2006 for the High Power...

  9. Vibration signatures, wavelets and principal components analysis in diesel engine

    E-Print Network [OSTI]

    Sharkey, Amanda

    Vibration signatures, wavelets and principal components analysis in diesel engine diagnostics G of a normally aspirated diesel engine contain valu­ able information on the health of the combustion chamber induced in a 4­stroke diesel engine and the ensuing vi­ bration signals recorded. Three different feature

  10. Vibration damping and heat transfer using material phase changes

    SciTech Connect (OSTI)

    Kloucek, Petr (Houston, TX); Reynolds, Daniel R. (Oakland, CA)

    2009-03-24T23:59:59.000Z

    A method and apparatus wherein phase changes in a material can dampen vibrational energy, dampen noise and facilitate heat transfer. One embodiment includes a method for damping vibrational energy in a body. The method comprises attaching a material to the body, wherein the material comprises a substrate, a shape memory alloy layer, and a plurality of temperature change elements. The method further comprises sensing vibrations in the body. In addition, the method comprises indicating to at least a portion of the temperature change elements to provide a temperature change in the shape memory alloy layer, wherein the temperature change is sufficient to provide a phase change in at least a portion of the shape memory alloy layer, and further wherein the phase change consumes a sufficient amount of kinetic energy to dampen at least a portion of the vibrational energy in the body. In other embodiments, the shape memory alloy layer is a thin film. Additional embodiments include a sensor connected to the material.

  11. Vibrational Raman Spectroscopy of High-temperature Superconductors

    E-Print Network [OSTI]

    Nabben, Reinhard

    Vibrational Raman Spectroscopy of High-temperature Superconductors C. Thomsen and G. Kaczmarczyk-temperature Superconductors C. Thomsen and G. Kaczmarczyk Technical University of Berlin, Berlin, Germany 1 INTRODUCTION Raman after the discovery of high- critical-temperature Tc superconductors:2 while reports on Raman scattering

  12. Spectroscopic probes of vibrationally excited molecules at chemically significant energies

    SciTech Connect (OSTI)

    Rizzo, T.R. [Univ. of Rochester, NY (United States)

    1993-12-01T23:59:59.000Z

    This project involves the application of multiple-resonance spectroscopic techniques for investigating energy transfer and dissociation dynamics of highly vibrationally excited molecules. Two major goals of this work are: (1) to provide information on potential energy surfaces of combustion related molecules at chemically significant energies, and (2) to test theoretical modes of unimolecular dissociation rates critically via quantum-state resolved measurements.

  13. absorption va vibrational: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    absorption va vibrational First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 LE JOURNAL DE .PHYSIQUE...

  14. Vibrational properties of double-walled carbon J. Maultzsch

    E-Print Network [OSTI]

    Nabben, Reinhard

    , University of Belgrade, P.O. Box 368, 11001 Belgrade, Serbia Abstract. We study the vibrational properties, the change in phonon frequencies due to the wall interaction is larger for the high-energy optical phonon. Total energy per carbon atom after relaxation of the atomic positions. Etot eV/atom radius Å Etot e

  15. Most Viewed Documents - Fission and Nuclear Technologies | OSTI...

    Office of Scientific and Technical Information (OSTI)

    States) (1997) Environmental Aspects, Objectives and Targets Identification Process R. Green (2002) Flow-induced vibration of circular cylindrical structures Chen, S.S. (1985)...

  16. June 2015 Most Viewed Documents for Fission And Nuclear Technologies...

    Office of Scientific and Technical Information (OSTI)

    Savannah River Co., Aiken, SC (United States)) (1992) 245 Cleaning Contaminated Water at Fukushima Rende, Dean; Nenoff, Tina (2013) 204 Flow-induced vibration of circular...

  17. Environment | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Science Ecological Resources and Systems Environmental Security and Restoration Land and Renewable Resources Radiation and Chemical Risk Management Environment True energy...

  18. Climate Change, Drought & Environment

    Broader source: Energy.gov [DOE]

    Afternoon Plenary Session: Current Trends in the Advanced Bioindustry Climate Change, Drought, and Environment—Michael Champ, Executive Director, The Sustainable Water Challenge

  19. MyRED Mobiles Student Views

    E-Print Network [OSTI]

    Farritor, Shane

    tap on Shopping Cart, then select term. Tap on Class Search to find courses to place in your shoppingMyRED Mobiles Student Views Mar 2014 Page 1 Login/Sign-in Enter your MyRED /TrueYou credentials. Tap on any Term bar to view a schedule for the selected term. Home Screen/Main Menu Class Schedule

  20. Mode-selective vibrational control of charge transport in $?$-conjugated molecular materials

    E-Print Network [OSTI]

    Artem A. Bakulin; Robert Lovrin?i?; Yu Xi; Oleg Selig; Huib J. Bakker; Yves L. A. Rezus; Pabitra K. Nayak; Alexandr Fonari; Veaceslav Coropceanu; Jean-Luc Brédas; David Cahen

    2015-03-02T23:59:59.000Z

    The soft character of organic materials leads to strong coupling between molecular nuclear and electronic dynamics. This coupling opens the way to control charge transport in organic electronic devices by inducing molecular vibrational motions. However, despite encouraging theoretical predictions, experimental realization of such control has remained elusive. Here we demonstrate experimentally that photoconductivity in a model organic optoelectronic device can be controlled by the selective excitation of molecular vibrations. Using an ultrafast infrared laser source to create a coherent superposition of vibrational motions in a pentacene/C60 photoresistor, we observe that excitation of certain modes in the 1500-1700 cm$^{-1}$ region leads to photocurrent enhancement. Excited vibrations affect predominantly trapped carriers. The effect depends on the nature of the vibration and its mode-specific character can be well described by the vibrational modulation of intermolecular electronic couplings. Vibrational control thus presents a new tool for studying electron-phonon coupling and charge dynamics in (bio)molecular materials.

  1. Groundwater Modeling in ArcView: by integrating ArcView, MODFLOW and

    E-Print Network [OSTI]

    Sengupta, Raja

    Groundwater Modeling in ArcView: by integrating ArcView, MODFLOW and MODPATH Abstract Modeling. This paper addresses groundwater modeling which is one of the many entities in environmental modeling in ArcView 3.2a. The objective was to create an integrated system where a user could do groundwater

  2. Honors Enrichment Contracts Faculty View Page 1 Honors Enrichment Contracts Faculty View

    E-Print Network [OSTI]

    Honors Enrichment Contracts ­ Faculty View Page 1 Honors Enrichment Contracts ­ Faculty View INITIAL APPROVAL #12;Honors Enrichment Contracts ­ Faculty View Page 2 Summary This document contains information about how to make initial and final decisions on Honors Enrichment Contracts submitted by honors

  3. environment and agriculture

    E-Print Network [OSTI]

    environment and agriculture environmentagriculture.curtin.edu.au Bachelor of Science - majorS in agriculture, environmental Biology or coaStal Zone management Science and engineering #12;t he department of environment and agriculture caters for students who are passionate about agriculture, biology, conserving

  4. Sustainability Statement Environment Team

    E-Print Network [OSTI]

    Metropolitan University www.mmu.ac.uk/environment MMU Annual Sustainability Statement 2008/2009 CO2 2 Contents 6 MMU Environment Strategy 7 Key Area 1 ­ Environmental Management Systems & Reporting 8 ­ 9 Key Area 2 ­ Energy and Carbon Emissions 10 ­ 11 Key Area 3 ­ Sustainable Buildings 12 Key Area 4 ­ Water

  5. Radiation effects in the environment

    SciTech Connect (OSTI)

    Begay, F.; Rosen, L.; Petersen, D.F.; Mason, C.; Travis, B. [Los Alamos National Lab., NM (United States); Yazzie, A. [Navajo Nation, Window Rock, AZ (United States). Dept. of History; Isaac, M.C.P.; Seaborg, G.T. [Lawrence Berkeley National Lab., CA (United States); Leavitt, C.P. [Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Physics and Astronomy

    1999-04-01T23:59:59.000Z

    Although the Navajo possess substantial resource wealth-coal, gas, uranium, water-this potential wealth has been translated into limited permanent economic or political power. In fact, wealth or potential for wealth has often made the Navajo the victims of more powerful interests greedy for the assets under limited Navajo control. The primary focus for this education workshop on the radiation effects in the environment is to provide a forum where scientists from the nuclear science and technology community can share their knowledge toward the advancement and diffusion of nuclear science and technology issues for the Navajo public. The scientists will make an attempt to consider the following basic questions; what is science; what is mathematics; what is nuclear radiation? Seven papers are included in this report: Navajo view of radiation; Nuclear energy, national security and international stability; ABC`s of nuclear science; Nuclear medicine: 100 years in the making; Radon in the environment; Bicarbonate leaching of uranium; and Computational methods for subsurface flow and transport. The proceedings of this workshop will be used as a valuable reference materials in future workshops and K-14 classrooms in Navajo communities that need to improve basic understanding of nuclear science and technology issues. Results of the Begay-Stevens research has revealed the existence of strange and mysterious concepts in the Navajo Language of nature. With these research results Begay and Stevens prepared a lecture entitled The Physics of Laser Fusion in the Navajo language. This lecture has been delivered in numerous Navajo schools, and in universities and colleges in the US, Canada, and Alaska.

  6. Nonlinear behavior of vibrating molecules on suspended graphene waveguides

    E-Print Network [OSTI]

    Banerjee, Amrita

    2015-01-01T23:59:59.000Z

    Suspended graphene waveguides were deposited on micron-scale periodic metal (plasmonic) structures. Raman scattering of test molecules (B. Megaterium), deposited on the waveguides' surface, exhibited azimuthal cycles upon rotation: at these micron scales, spontaneous Raman ought to be independent of phase matching conditions. In addition, we observed angular-selective quadratic intensity dependence contrary to the typical linear behavior of spontaneous Raman. The effects were observed at very modest pump laser intensities (<10 MW/cm2 at the sample surface, oftenly used in Raman experiments). We attributed these observations to nonlinear coupling between the vibrating molecules and surface plasmon polariton (SPP) modes at the molecular vibration frequency. It was assessed that the polariton mode propagates through fairly long distances (over 100 microns).

  7. Resonant vibrational excitation of CO by low-energy electrons

    SciTech Connect (OSTI)

    Poparic, G. B.; Belic, D. S.; Vicic, M. D. [Faculty of Physics, University of Belgrade, Studentski trg 12-16, P.O. Box 368, 11000 Belgrade (Serbia and Montenegro); Washington University School of Medicine, 4921 Parkview Place, Campus Box 8224, St. Louis, Missouri 63110-1093 (United States)

    2006-06-15T23:59:59.000Z

    Electron impact vibrational excitation of the CO molecule, via the {sup 2}{pi} resonance, in the 0-4 eV energy region has been investigated. The energy dependence of the resonant excitation of the first ten vibrational levels, v=1 to v=10, has been measured by use of a crossed-beams double trochoidal electron spectrometer. Obtained relative differential cross sections are normalized to the absolute values. Integral cross sections are determined by using our recent results on scattered electrons angular distributions, which demonstrate clear p-partial wave character of this resonance. Substructures appear in the {sup 2}{pi} resonant excitation of the CO molecule which have not been previously observed.

  8. Optical properties of C{sub 60} vibrations

    SciTech Connect (OSTI)

    Bertsch, G.F. [Department of Physics and Institute of Nuclear Theory, FM-15, University of Washington, Seattle, Washington 98915 (United States)] [Department of Physics and Institute of Nuclear Theory, FM-15, University of Washington, Seattle, Washington 98915 (United States); Smith, A. [Department of Chemistry, BG-10, University of Washington, Seattle, Washington 98915 (United States)] [Department of Chemistry, BG-10, University of Washington, Seattle, Washington 98915 (United States); Yabana, K. [Department of Physics, Niigata University, Niigata 950-21 (Japan)] [Department of Physics, Niigata University, Niigata 950-21 (Japan)

    1995-09-15T23:59:59.000Z

    The tight-binding and local-density approximation (LDA) models of the electronic structure for C{sub 60} are applied to calculate the transition strength of the four infrared-active vibrations. The tight-binding results are of the correct order of magntiude, but not accurate enough to have predictive power. The LDA results give a much better description of the relative and absolute strengths of the four modes.

  9. Defining the Problem Known Environment Unknown Environment Improvements Reinforcement Learning

    E-Print Network [OSTI]

    Kjellström, Hedvig

    Defining the Problem Known Environment Unknown Environment Improvements Reinforcement Learning Bel¨oningsbaserad Inl¨arning #12;Defining the Problem Known Environment Unknown Environment Improvements 1 Defining the Problem Framework Role of Reward Simplifying Assumptions Central Concepts 2 Known Environment Bellman

  10. Defining the Problem Known Environment Unknown Environment Improvements Reinforcement Learning

    E-Print Network [OSTI]

    Kjellström, Hedvig

    Defining the Problem Known Environment Unknown Environment Improvements Reinforcement Learning Bel¨oningsbaserad Inl¨arning #12;Defining the Problem Known Environment Unknown Environment Improvements 1 Defining the Problem Framework Role of Reward Simplifying Assumptions Central Concepts 2 Known Environment Bellmans

  11. A vacuum microgripping tool with integrated vibration releasing capability

    SciTech Connect (OSTI)

    Rong, Weibin; Fan, Zenghua, E-mail: zenghua-fan@163.com; Wang, Lefeng; Xie, Hui; Sun, Lining [State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, Heilongjiang (China)

    2014-08-01T23:59:59.000Z

    Pick-and-place of micro-objects is a basic task in various micromanipulation demands. Reliable releasing of micro-objects is usually disturbed due to strong scale effects. This paper focuses on a vacuum micro-gripper with vibration releasing functionality, which was designed and assembled for reliable micromanipulation tasks. Accordingly, a vibration releasing strategy of implementing a piezoelectric actuator on the vacuum microgripping tool is presented to address the releasing problem. The releasing mechanism was illustrated using a dynamic micro contact model. This model was developed via theoretical analysis, simulations and pull-off force measurement using atomic force microscopy. Micromanipulation experiments were conducted to verify the performance of the vacuum micro-gripper. The results show that, with the assistance of the vibration releasing, the vacuum microgripping tool can achieve reliable release of micro-objects. A releasing location accuracy of 4.5±0.5 ?m and a successful releasing rate of around 100% (which is based on 110 trials) were achieved for manipulating polystyrene microspheres with radius of 35–100 ?m.

  12. Advanced engineering environment collaboration project.

    SciTech Connect (OSTI)

    Lamph, Jane Ann; Pomplun, Alan R.; Kiba, Grant W.; Dutra, Edward G.; Dankiewicz, Robert J.; Marburger, Scot J.

    2008-12-01T23:59:59.000Z

    The Advanced Engineering Environment (AEE) is a model for an engineering design and communications system that will enhance project collaboration throughout the nuclear weapons complex (NWC). Sandia National Laboratories and Parametric Technology Corporation (PTC) worked together on a prototype project to evaluate the suitability of a portion of PTC's Windchill 9.0 suite of data management, design and collaboration tools as the basis for an AEE. The AEE project team implemented Windchill 9.0 development servers in both classified and unclassified domains and used them to test and evaluate the Windchill tool suite relative to the needs of the NWC using weapons project use cases. A primary deliverable was the development of a new real time collaborative desktop design and engineering process using PDMLink (data management tool), Pro/Engineer (mechanical computer aided design tool) and ProductView Lite (visualization tool). Additional project activities included evaluations of PTC's electrical computer aided design, visualization, and engineering calculations applications. This report documents the AEE project work to share information and lessons learned with other NWC sites. It also provides PTC with recommendations for improving their products for NWC applications.

  13. A view-sequential 3D display

    E-Print Network [OSTI]

    Cossairt, Oliver S. (Oliver Strider), 1978-

    2003-01-01T23:59:59.000Z

    This thesis outlines the various techniques for creating electronic 3D displays and analyzes their commercial potential. The thesis argues for the use of view-sequential techniques in the design of 3D displays based on ...

  14. California's Energy Future - The View to 2050

    E-Print Network [OSTI]

    2011-01-01T23:59:59.000Z

    carbon capture and storage, especially as a technology thatCarbon capture and sequestration CCST California Council on Science and Technologytechnology California’s Energy Future - The View to 2050 becomes available. ? ? Fossil fuel with carbon capture

  15. The new option view of investment

    E-Print Network [OSTI]

    Dixit, Avinash K.

    1995-01-01T23:59:59.000Z

    This paper provides a simple introduction to the new option view of investment. We explain the shortcomings of the orthodox theory, and then outline the basic ideas behind the option framework. Several industry examples ...

  16. JOBAID-VIEWING AN EMPLOYEE MATRIX (SUPERVISOR)

    Broader source: Energy.gov [DOE]

    The purpose of this job aid is to guide supervisor users through the step-by-step process of viewing an employee matrix within SuccessFactors Learning.

  17. Incorporating video into Google Mobile Street View

    E-Print Network [OSTI]

    Wright, Christina (Christina E.)

    2010-01-01T23:59:59.000Z

    Mobile Street View is a compelling application but suffers from significant latency problems, especially in limited bandwidth circumstances. Currently, the application uses static images to display street level information. ...

  18. Jefferson and Hamilton as viewed by historians

    E-Print Network [OSTI]

    Jungmeyer, Paul Edward

    1970-01-01T23:59:59.000Z

    JEFFERSON AND HAMILTON AS VIEHED BY HISTORIANS A Thesis Paul Edward Jungmeyer Submitted to the Graduate College of Texas A&M University in ' partial fulfillment of the requirement for the degree of MASTER OF ARTS August, 1970 Major Subject...: History JEFFERSON AND HAMILTON AS VIEWED BY HISTORIANS A Thesis by Paul Edward Jungmeyer Approved as to style and content by: (Chairman of Committee d i~) (Member) (M er) August, 1970 ABSTRACT JEFFERSON AND HAMILTON AS VIEWED BY HISTORIANS...

  19. Photographs of MIT environments

    E-Print Network [OSTI]

    Strand, C. Mark

    1984-01-01T23:59:59.000Z

    This thesis is based on an exhibition of 43 photographs shown in a visual thesis exhibition at the Creative Photography Gallery November 15-December 15, 1983. The photographs document MIT environments with special categories ...

  20. Environment induced incoherent controllability

    E-Print Network [OSTI]

    Raffaele Romano; Domenico D'Alessandro

    2005-11-08T23:59:59.000Z

    We prove that the environment induced entanglement between two non interacting, two-dimensional quantum systems S and P can be used to control the dynamics of S by means of the initial state of P. Using a simple, exactly solvable model, we show that both accessibility and controllability of S can be achieved under suitable conditions on the interaction of S and P with the environment.

  1. Hotspots, Jets and Environments

    E-Print Network [OSTI]

    M. J. Hardcastle

    2007-07-12T23:59:59.000Z

    I discuss the nature of `hotspots' and `jet knots' in the kpc-scale structures of powerful radio galaxies and their relationship to jet-environment interactions. I describe evidence for interaction between the jets of FRI sources and their local environments, and discuss its relationship to particle acceleration, but the main focus of the paper is the hotspots of FRIIs and on new observational evidence on the nature of the particle acceleration associated with them.

  2. Polymers in disordered environments

    E-Print Network [OSTI]

    V. Blavatska; N. Fricke; W. Janke

    2014-11-18T23:59:59.000Z

    A brief review of our recent studies aiming at a better understanding of the scaling behaviour of polymers in disordered environments is given. The main emphasis is on a simple generic model where the polymers are represented by (interacting) self-avoiding walks and the disordered environment by critical percolation clusters. The scaling behaviour of the number of conformations and their average spatial extent as a function of the number of monomers and the associated critical exponents $\\gamma$ and $\

  3. Energy/Environment/Commissioning

    E-Print Network [OSTI]

    Nakahara, N.

    2006-01-01T23:59:59.000Z

    / Energy / Environment/ SutainabilitySutainability Resource/ Energy System TheoryPreserve/Degrade Man Economy/SocietyHealth/Hygiene Enviro nment Global Env.Urban Env. Environm- ent ModelChemical/Thermal PollutionRecycle Diffused Energy Active System... Energy Use Pattern Global Env. Pollution Urban Environment ? Demand Control Optimization Humanism Maintenance/Moral ? Renewable Energy Energy Recycle Proper Evaluation ? High Efficiency Energy Conservation PrincipleEnergy Conservation Principle Reflection...

  4. Vibrationally induced center reconfiguration in co-doped GaN:Eu, Mg epitaxial layers: Local hydrogen migration vs. activation of non-radiative channels

    SciTech Connect (OSTI)

    Mitchell, B.; Dierolf, V. [Lehigh University, 16 Memorial Dr. E, Bethlehem, Pennsylvania 18015 (United States)] [Lehigh University, 16 Memorial Dr. E, Bethlehem, Pennsylvania 18015 (United States); Lee, D. [Lawrence Livermore National Laboratory, 7000 East Ave L-413, California 94550 (United States)] [Lawrence Livermore National Laboratory, 7000 East Ave L-413, California 94550 (United States); Lee, D.; Fujiwara, Y. [Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871 (Japan)] [Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871 (Japan)

    2013-12-09T23:59:59.000Z

    Europium doped gallium nitride (GaN:Eu) is a promising candidate as a material for red light emitting diodes. When Mg was co-doped into GaN:Eu, additional incorporation environments were discovered that show high excitation efficiency at room temperature and have been attributed to the coupling of Mg-H complexes to the majority Eu site. Electron beam irradiation, indirect and resonant (direct) laser excitation were found to modify these complexes, indicating that vibrational energy alone can trigger the migration of the H while the presence of additional charges and excess energy controls the type of reconfiguration and the activation of non-radiative decay channels.

  5. Interfacial Water Organization and Ion Distributions Investigated with Vibrational Sum Frequency Spectroscopy: Answering Fundamental Questions for

    E-Print Network [OSTI]

    sum frequency generation (VSFG) and heterodyne-detected vibrational sum frequency generation (HD above their counterions. However, high valency anions exist below their counter cations, #12;iv causing

  6. Vibration-assisted coherent excitation energy transfer in a detuning system

    E-Print Network [OSTI]

    Xin Wang; Hao Chen; Hong-rong Li

    2014-12-16T23:59:59.000Z

    The roles of the vibration motions played in the excitation energy transfer process are studied. It is found that a strong coherent transfer in the hybrid system emerges when the detuning between the donor and the acceptor equals the intrinsic frequency of the vibrational mode, and as a result the energy can be transferred into the acceptor much effectively. Three cases of the donor and the acceptor coupling with vibrational modes are investigated respectively. We find that the quantum interference between the two different transfer channels via the vibrational modes can affects the dynamics of the system significantly.

  7. axial view inductively: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    View of Induction Reasoning for First-Order Logic Physics Websites Summary: , The Alan Turing Centenary Conference (2012)" 12;A Unified View of Induction Reasoning for First in...

  8. Residential Windows and Window Coverings: A Detailed View of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Residential Windows and Window Coverings: A Detailed View of the Installed Base and User Behavior Residential Windows and Window Coverings: A Detailed View of the Installed Base...

  9. Better Buildings Network View | April 2014 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    April 2014 More Documents & Publications Better Buildings Network View | December 2014 Better Buildings Residential Network Orientation Better Buildings Network View | November...

  10. Better Buildings Network View | February 2014 | Department of...

    Energy Savers [EERE]

    February 2014 Better Buildings Network View | February 2014 The Better Buildings Network View monthly newsletter from the U.S. Department of Energy's Better Buildings Residential...

  11. Better Buildings Network View | January 2015 | Department of...

    Broader source: Energy.gov (indexed) [DOE]

    5 More Documents & Publications Better Buildings Network View | December 2014 Better Buildings Network View | November 2014 Better Buildings Residential Network Orientation...

  12. Better Buildings Network View | June 2014 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    June 2014 Better Buildings Network View | June 2014 The Better Buildings Network View monthly newsletter from the U.S. Department of Energy's Better Buildings Residential Network....

  13. Better Buildings Network View | March 2014 | Department of Energy

    Energy Savers [EERE]

    March 2014 Better Buildings Network View | March 2014 The Better Buildings Network View monthly newsletter from the U.S. Department of Energy's Better Buildings Residential...

  14. Better Buildings Network View | December 2014 | Department of...

    Energy Savers [EERE]

    December 2014 Better Buildings Network View | December 2014 The Better Buildings Network View monthly newsletter from the U.S. Department of Energy's Better Buildings Residential...

  15. Better Buildings Network View | January 2014 | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    4 Better Buildings Network View | January 2014 The Better Buildings Network View monthly newsletter from the U.S. Department of Energy's Better Buildings Residential Network....

  16. Better Buildings Network View | October 2014 | Department of...

    Energy Savers [EERE]

    October 2014 Better Buildings Network View | October 2014 The Better Buildings Network View monthly newsletter from the U.S. Department of Energy's Better Buildings Residential...

  17. Better Buildings Network View | February 2015 | Department of...

    Broader source: Energy.gov (indexed) [DOE]

    5 More Documents & Publications Better Buildings Network View | November 2014 Better Buildings Network View | September 2014 Better Buildings Residential Network Case Study:...

  18. The Desert Environment January 26, 1999 1 The Desert Environment

    E-Print Network [OSTI]

    Reiss, Steven P.

    The Desert Environment January 26, 1999 1 The Desert Environment Revised Paper Steven P. Reiss1@cs.brown.edu Abstract The Desert software engineering environment is a suite of tools developed to enhance pro- grammer virtual files on demand to address specific tasks. All this is done in an open and extensible environment

  19. A Maxwell Construction for Phase Separation in Vibrated Granular Matter?

    E-Print Network [OSTI]

    James P. D. Clewett; Jack Wade; R. M. Bowley; Stephan Herminghaus; Michael R. Swift; Marco G. Mazza

    2015-02-28T23:59:59.000Z

    Experiments and computer simulations are carried out to investigate ordering principles in a granular gas which phase separates under vibration. The densities of the dilute and the dense phase are found to follow a lever rule. A Maxwell construction is found to predict both the coexisting pressure and binodal densities remarkably well, despite the fact that the pressure-volume characteristic $P(v)$ is not an isotherm. Although the system is far from equilibrium and energy conservation is strongly violated, we derive the construction from the minimization of mechanical work and fluctuating particle currents.

  20. Damping element for reducing the vibration of an airfoil

    DOE Patents [OSTI]

    Campbell, Christian X; Marra, John J

    2013-11-12T23:59:59.000Z

    An airfoil (10) is provided with a tip (12) having an opening (14) to a center channel (24). A damping element (16) is inserted within the opening of the center channel, to reduce an induced vibration of the airfoil. The mass of the damping element, a spring constant of the damping element within the center channel, and/or a mounting location (58) of the damping element within the center channel may be adjustably varied, to shift a resonance frequency of the airfoil outside a natural operating frequency of the airfoil.

  1. Structural vibration measurement and analysis using a novel digital sensor 

    E-Print Network [OSTI]

    Minier, Elizabeth Altagracia

    1992-01-01T23:59:59.000Z

    the sensors into the laminae of a composite material. The primary uses of these sensors include providing feedback signals to active vibration dampers and reporting the occurance of damage. It is the purview of the conceptual designer to exploit new.../QB = BN3903 NPN Transistor Figure 8. Schematic diagram of digital sensor circuit 24 will snap "high". Similarly as the signal falls below the reference level, the outputs will snap "low". The resulting signals are near-square wave outputs at two logic...

  2. Direct Measurements of Pore Fluid Density by Vibrating Tube Densimetry

    SciTech Connect (OSTI)

    Gruszkiewicz, Miroslaw {Mirek} S [ORNL; Rother, Gernot [ORNL; Wesolowski, David J [ORNL; Cole, David R [ORNL; Wallacher, Dirk [Helmholtz-Zentrum Berlin

    2012-01-01T23:59:59.000Z

    The densities of pore-confined fluids were measured for the first time by means of a vibrating tube method. Isotherms of total adsorption capacity were measured directly making the method complementary to the conventional gravimetric or volumetric/piezometric adsorption techniques, which yield the excess adsorption (the Gibbsian surface excess). A custom-made high-pressure, high-temperature vibrating tube densimeter (VTD) was used to measure the densities of subcritical and supercritical propane (between 35 C and 97 C) and supercritical carbon dioxide (between 32 C and 50 C) saturating hydrophobic silica aerogel (0.2 g/cm3, 90% porosity) synthesized inside Hastelloy U-tubes. Additionally, excess adsorption isotherms for supercritical CO2 and the same porous solid were measured gravimetrically using a precise magnetically-coupled microbalance. Pore fluid densities and total adsorption isotherms increased monotonically with increasing density of the bulk fluid, in contrast to excess adsorption isotherms, which reached a maximum at a subcritical density of the bulk fluid, and then decreased towards zero or negative values at supercritical densities. Compression of the confined fluid significantly beyond the density of the bulk liquid at the same temperature was observed at subcritical temperatures. The features of the isotherms of confined fluid density are interpreted to elucidate the observed behavior of excess adsorption. The maxima of excess adsorption were found to occur below the critical density of the bulk fluid at the conditions corresponding to the beginning of the plateau of total adsorption, marking the end of the transition of pore fluid to a denser, liquid-like pore phase. The results for propane and carbon dioxide showed similarity in the sense of the principle of corresponding states. No measurable effect of pore confinement on the liquid-vapor critical point was found. Quantitative agreement was obtained between excess adsorption isotherms determined from VTD total adsorption results and those measured gravimetrically at the same temperature, confirming the validity of the vibrating tube measurements. Vibrating tube densimetry was demonstrated as a novel experimental approach capable of providing the average density of pore-confined fluids.

  3. KNOTS AND RANDOM WALKS IN VIBRATED GRANULAR CHAINS

    SciTech Connect (OSTI)

    E. BEN-NAIM; ET AL

    2000-08-01T23:59:59.000Z

    The authors study experimentally statistical properties of the opening times of knots in vertically vibrated granular chains. Our measurements are in good qualitative and quantitative agreement with a theoretical model involving three random walks interacting via hard core exclusion in one spatial dimension. In particular, the knot survival probability follows a universal scaling function which is independent of the chain length, with a corresponding diffusive characteristic time scale. Both the large-exit-time and the small-exit-time tails of the distribution are suppressed exponentially, and the corresponding decay coefficients are in excellent agreement with the theoretical values.

  4. Improving the web browsing environment for dyslexics by elaborating the viewing and reading functionalities

    E-Print Network [OSTI]

    functionalities by R. Nagatsuma, S. Iizuka, M. Takizawa, T. Ohko, T. Wada, and T. Saito, IBM Abstract Dyslexia of people who experience dyslexia may be around 6-10% of the population. It varies from language to language for people with dyslexia when they are browsing the Web. In this paper, we investigate effective support

  5. Saving the Spirit of Our Places: A View on Our Built Environment

    E-Print Network [OSTI]

    Nivala, John

    1996-01-01T23:59:59.000Z

    6, at 112. 60. See Timothy Beatley, Comment: Planning andit must respond to 224. Beatley, supra note 60, at 385. For

  6. Controlled bidirectional remote state preparation in noisy environment: A generalized view

    E-Print Network [OSTI]

    Vishal Sharma; Chitra Shukla; Subhashish Banerjee; Anirban Pathak

    2014-09-02T23:59:59.000Z

    It is shown that a realistic, controlled bidirectional remote state preparation is possible using a large class of entangled quantum states having a particular structure. Existing protocols of probabilistic, deterministic and joint remote state preparation are generalized to obtain the corresponding protocols of controlled bidirectional remote state preparation (CBRSP). A general way of incorporating the effects of two well known noise processes, the amplitude-damping and phase-damping noise, on the probabilistic CBRSP process is studied in detail by considering that noise only affects the travel qubits of the quantum channel used for the probabilistic CBRSP process. Also indicated is how to account for the effect of these noise channels on deterministic and joint remote state CBRSP protocols.

  7. Three-dimensional virtual environment for spatial development

    E-Print Network [OSTI]

    Bateman, Kathleen Suzanne

    2005-02-17T23:59:59.000Z

    virtual three-dimensional scene and move through it, I developed a computer program called Viewpoints. The program's graphical interface presents a 3D perspective view of an environment. Simple geometric objects such as boxes and spheres can be placed... manipulations. Functions with similar purposes act and look similar. When appropriate, menu options matched in word choice and purpose to standard menu options available in other computer programs. Consistent use of color plays an important role in revealing...

  8. Environment scattering in GADRAS.

    SciTech Connect (OSTI)

    Thoreson, Gregory G.; Mitchell, Dean James; Theisen, Lisa Anne; Harding, Lee T.

    2013-09-01T23:59:59.000Z

    Radiation transport calculations were performed to compute the angular tallies for scattered gamma-rays as a function of distance, height, and environment. Green's Functions were then used to encapsulate the results a reusable transformation function. The calculations represent the transport of photons throughout scattering surfaces that surround sources and detectors, such as the ground and walls. Utilization of these calculations in GADRAS (Gamma Detector Response and Analysis Software) enables accurate computation of environmental scattering for a variety of environments and source configurations. This capability, which agrees well with numerous experimental benchmark measurements, is now deployed with GADRAS Version 18.2 as the basis for the computation of scattered radiation.

  9. Measurements using tangentially viewing bolometers on TFTR

    SciTech Connect (OSTI)

    Bush, C.E.; Schivell, J.; Budny, R.; Ellis R.A. III; Goldston, R.J.; McCune, D.; Medley, S.S.; Scott, S.D.; Towner, H.H.; Wieland, R.M.; and others

    1988-08-01T23:59:59.000Z

    Co- and counter-viewing bolometers aimed along a common tangency chord are being used to study power losses due to charge exchange (CX) of fast ions in neutral beam injection (NBI) heated TFTR plasmas. For unidirectional injection, tangential bolometers oriented to view CX loss of circulating fast ions detect losses from the thermal target plasma (impurity radiation and CX) plus power due to the fast ion CX loss, whereas bolometers oppositely directed measure only the target plasma contribution. The difference between the two signals is a measure of the fast ion CX loss. Additional information is obtained by comparing the tangential bolometer signals with those of perpendicularly viewing bolometer monitors and arrays. The measurements are compared to results of the TRANSP code analysis.

  10. Sandia National Laboratories: Climate/Environment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ClimateEnvironment ClimateEnvironment On January 27, 2011, in ClimateEnvironment Sensing and Monitoring Modeling and Analysis Carbon Management Water & Environment Publications...

  11. Sample Environment Plans and Progress

    E-Print Network [OSTI]

    Pennycook, Steve

    Sample Environment Plans and Progress at the SNS & HFIR SNS HFIR User Group Meeting American Conference on Neutron Scattering Ottawa, Canada June 26 ­ 30, 2010 Lou Santodonato Sample Environment Group our sample environment capabilities Feedback SHUG meetings User surveys Sample Environment Steering

  12. DISTRIBUTED AND COLLABORATIVE SYNTHETIC ENVIRONMENTS

    E-Print Network [OSTI]

    Texas at Austin, University of

    1 DISTRIBUTED AND COLLABORATIVE SYNTHETIC ENVIRONMENTS Chandrajit L. Bajaj and Fausto Bernardini with synthetic environments1,2,3,4,5,6 . A synthetic environment system is generally characterized and the synthetic environment generated by the computer. Several degrees of immersion are possible, ranging from

  13. Research Articles Holistic Programming Environments

    E-Print Network [OSTI]

    Marsden, Gary

    Research Articles Holistic Programming Environments Gary Marsden a Harold Thimbleby b a Department a development environment. Of course, we can scoff at the distinction and say that a development environment to the development of programming environments and suggest ways in which this may be achieved. Keywords: Programming

  14. A Personal Distributed Environment for Future Mobile Systems J Dunlop, R C Atkinson, J Irvine & D Pearce

    E-Print Network [OSTI]

    Atkinson, Robert C

    A Personal Distributed Environment for Future Mobile Systems J Dunlop, R C Atkinson, J Irvine & D, UK, G1 1XW Email: j.dunlop@eee.strath.ac.uk ABSTRACT A Personal Distributed Environment (PDE) embraces a user-centric view of communications that take place against a backdrop of multiple user devices

  15. September 2013 Most Viewed Documents for Fission And Nuclear...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    I: research program design. Final report Brown, W.H.; Gopalakrishnan, S.; Fehlau, R.; Thompson, W.E.; Wilson, D.G. (1982) 69 > Flow-induced vibration of circular cylindrical...

  16. Author's personal copy Environments

    E-Print Network [OSTI]

    Carrascal, Luis M.

    . The easternmost main islands of the Canary archipelago (Fuerteventura and Lanzarote, North Atlantic Ocean, Spain Ltd. All rights reserved. Keywords: Arid environments; Canary islands; Cream-coloured courser) harbour a stable population. The species showed an intense habitat selection pattern in these islands. Its

  17. Environment US Army Corps

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Asia, Europe and the U. S. An environment once pristine and rich in biological diversity now suffers · Pentagon official lauds services for energy strategies · Corps among winners at `GOVgreen' 16 Sustainability Awards coming soon Corps team earns international recognition Regulators discuss mitigation

  18. Interactive Virtual Environments Introduction

    E-Print Network [OSTI]

    Petriu, Emil M.

    sensor data or by animation scripts. Human users can interact and directly manipulate objects within Reality Interactive Virtual Reality Virtualized Reality Augmented Reality #12;HUMAN PERCEPTION OF REALITY REAL WORLD / ENVIRONMENT HUMAN (sentient living animal able of sensible reasoning) #12;Real

  19. Multiprocessor programming environment

    SciTech Connect (OSTI)

    Smith, M.B.; Fornaro, R.

    1988-12-01T23:59:59.000Z

    Programming tools and techniques have been well developed for traditional uniprocessor computer systems. The focus of this research project is on the development of a programming environment for a high speed real time heterogeneous multiprocessor system, with special emphasis on languages and compilers. The new tools and techniques will allow a smooth transition for programmers with experience only on single processor systems.

  20. save energy, environment

    E-Print Network [OSTI]

    Boyer, Elizabeth W.

    was especially emphasized dur- ing the 1970s to combat the energy crisis caused by Arab oil embargoes. The recentsave energy, money, and the environment Windbreaks and shade trees #12;PrePared by Bryan R trees is based on their potential to save money from subsequent energy re- ductions. Winter heating

  1. BLUE VIEW VISION INSIGHT! Good news--your vision plan

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    WELCOME TO BLUE VIEW VISION INSIGHT! Good news--your vision plan is flexible and easy to use, your discounts, and much more! Blue View Vision InsightSM University of California Student Health Insurance Plan (UC SHIP) 2013/14 Your Blue View Vision Insight Network Blue View Vision Insight offers you

  2. BLUE VIEW VISION INSIGHT! Good news--your vision plan

    E-Print Network [OSTI]

    Barrett, Jeffrey A.

    WELCOME TO BLUE VIEW VISION INSIGHT! Good news--your vision plan is flexible and easy to use, your discounts, and much more! Blue View Vision InsightSM University of California Student Health Insurance Plan (UC SHIP) 2012/13 Your Blue View Vision Insight Network Blue View Vision Insight offers you

  3. Transient grating spectroscopy of SF6 molecular vibrations

    E-Print Network [OSTI]

    Ferré, Amélie; Burgy, Frédéric; Dagan, Michal; Descamps, Dominique; Dudovich, Nirit; Petit, Stéphane; Soifer, Hadas; Blanchet, Valérie; Mairesse, Yann

    2014-01-01T23:59:59.000Z

    Strong field transient grating spectroscopy has shown to be a very versatile tool in time-resolved molecular spectroscopy. Here we use this technique to investigate the high-order harmonic generation from SF6 molecules vibrationally excited by impulsive stimulated Raman scattering. Transient grating spectroscopy enables us to reveal clear modulations of the harmonic emission. This heterodyne detection shows that the harmonic emission generated between 14 to 26 eV is mainly sensitive to two among the three active Raman modes in SF6, i.e. the strongest and fully symmetric nu 1-A1g mode (774 cm-1, 43 fs) and the slowest mode nu5-T2g (524 cm-1, 63 fs). A time-frequency analysis of the harmonic emission reveals additional dynamics: the strength and central frequency of the nu 1 mode oscillate with a frequency of 52 cm-1 (640 fs). This could be a signature of the vibration of dimers in the generating medium. Harmonic 11 shows a remarkable behavior, oscillating in opposite phase, both on the fast (774 cm-1) and slow...

  4. Combined passive magnetic bearing element and vibration damper

    DOE Patents [OSTI]

    Post, Richard F. (Walnut Creek, CA)

    2001-01-01T23:59:59.000Z

    A magnetic bearing system contains magnetic subsystems which act together to support a rotating element in a state of dynamic equilibrium and dampen transversely directed vibrations. Mechanical stabilizers are provided to hold the suspended system in equilibrium until its speed has exceeded a low critical speed where dynamic effects take over, permitting the achievement of a stable equilibrium for the rotating object. A state of stable equilibrium is achieved above a critical speed by use of a collection of passive elements using permanent magnets to provide their magnetomotive excitation. In a improvement over U.S. Pat. No. 5,495,221, a magnetic bearing element is combined with a vibration damping element to provide a single upper stationary dual-function element. The magnetic forces exerted by such an element, enhances levitation of the rotating object in equilibrium against external forces, such as the force of gravity or forces arising from accelerations, and suppresses the effects of unbalance or inhibits the onset of whirl-type rotor-dynamic instabilities. Concurrently, this equilibrium is made stable against displacement-dependent drag forces of the rotating object from its equilibrium position.

  5. Wind Turbine Gearbox Condition Monitoring Round Robin Study - Vibration Analysis

    SciTech Connect (OSTI)

    Sheng, S.

    2012-07-01T23:59:59.000Z

    The Gearbox Reliability Collaborative (GRC) at the National Wind Technology Center (NWTC) tested two identical gearboxes. One was tested on the NWTCs 2.5 MW dynamometer and the other was field tested in a turbine in a nearby wind plant. In the field, the test gearbox experienced two oil loss events that resulted in damage to its internal bearings and gears. Since the damage was not severe, the test gearbox was removed from the field and retested in the NWTCs dynamometer before it was disassembled. During the dynamometer retest, some vibration data along with testing condition information were collected. These data enabled NREL to launch a Wind Turbine Gearbox Condition Monitoring Round Robin project, as described in this report. The main objective of this project was to evaluate different vibration analysis algorithms used in wind turbine condition monitoring (CM) and find out whether the typical practices are effective. With involvement of both academic researchers and industrial partners, the project sets an example on providing cutting edge research results back to industry.

  6. Vibration atomic layer deposition for conformal nanoparticle coating

    SciTech Connect (OSTI)

    Park, Suk Won; Woo Kim, Jun; Jong Choi, Hyung; Hyung Shim, Joon, E-mail: shimm@korea.ac.kr [School of Mechanical Engineering, Korea University, Seoul 136-701 (Korea, Republic of)

    2014-01-15T23:59:59.000Z

    A vibration atomic layer deposition reactor was developed for fabricating a conformal thin-film coating on nanosize particles. In this study, atomic layer deposition of 10–15-nm-thick Al{sub 2}O{sub 3} films was conducted on a high-surface-area acetylene black powder with particle diameters of 200–250?nm. Intense vibration during the deposition resulted in the effective separation of particles, overcoming the interparticle agglomeration force and enabling effective diffusion of the precursor into the powder chunk; this phenomenon led to the formation of a conformal film coating on the nanopowder particles. It was also confirmed that the atomic layer deposition Al{sub 2}O{sub 3} films initially grew on the high-surface-area acetylene black powder particles as discrete islands, presumably because chemisorption of the precursor and water occurred only on a few sites on the high-surface-area acetylene black powder surface. Relatively sluggish growth of the films during the initial atomic layer deposition cycles was identified from composition analysis.

  7. Journal of Sound and Vibration 298 (2006) 108131 Elastic wave radiation from a high frequency

    E-Print Network [OSTI]

    Abrahams, I. David

    JOURNAL OF SOUND AND VIBRATION Journal of Sound and Vibration 298 (2006) 108­131 Elastic wave. Introduction Problems concerning the propagation, refraction and diffraction of waves are the subject method to detect defects is to analyse the scattering of the elastic waves generated by ultrasonic

  8. The Effect of Surface Wave Propagation on Neural Responses to Vibration in Primate Glabrous Skin

    E-Print Network [OSTI]

    Elias, Damian Octavio

    The Effect of Surface Wave Propagation on Neural Responses to Vibration in Primate Glabrous Skin preserved as it travels across the skin. Our results suggest, then, that the propagation of surface waves of Surface Wave Propagation on Neural Responses to Vibration in Primate Glabrous Skin. PLoS ONE 7(2): e31203

  9. Vibration Analysis of a Vertical Axis Wind Turbine Blade , S.Tullis 2

    E-Print Network [OSTI]

    Tullis, Stephen

    Vibration Analysis of a Vertical Axis Wind Turbine Blade K. Mc Laren 1 , S.Tullis 2 and S.Ziada 3 1 vibration source of a small-scale vertical axis wind turbine currently undergoing field-testing. The turbine at a blade-tip speed ratio (the ratio of the blade rotational velocity to the ambient wind velocity) of 1

  10. ACTIVE CONTROL OF FLOW SEPARATION AND STRUCTURAL VIBRATIONS OF WIND TURBINE BLADES

    E-Print Network [OSTI]

    Salama, Khaled

    ACTIVE CONTROL OF FLOW SEPARATION AND STRUCTURAL VIBRATIONS OF WIND TURBINE BLADES Sponsor: Ney actuators embedded inside the wind turbine blade to provide an efficient, rapid and compact means to alter the ability to shed excess wind loads off the blade. 3. Reduce vibration in the turbine blades by selectively

  11. Control of Drilling Vibrations: A Time-Delay System-Based Approach

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Control of Drilling Vibrations: A Time-Delay System-Based Approach Islam Boussaada , Arben Cela and torsional vibrations occurring along a rotary oilwell drilling system. This work completes a previous author of a rotary drilling system with a drag bit, using a model that takes into consideration the axial

  12. ESTIMATING DAMPING PARAMETERS IN MULTI-DEGREE-OF-FREEDOM VIBRATION SYSTEMS BY BALANCING ENERGY0

    E-Print Network [OSTI]

    Feeny, Brian

    ESTIMATING DAMPING PARAMETERS IN MULTI-DEGREE-OF-FREEDOM VIBRATION SYSTEMS BY BALANCING ENERGY0 B is outlined, involving a balance of dissipated and supplied energies over a cycle of pe- riodic vibration a damping estimation method based on the balance of energy. The idea is to compute the energy input per

  13. INVESTIGATION OF A COMPRESSOR ROTOR NON-SYNCHRONOUS VIBRATION WITH AND WITHOUT FLUID-STRUCTURE INTERACTION

    E-Print Network [OSTI]

    Zha, Gecheng

    INVESTIGATION OF A COMPRESSOR ROTOR NON-SYNCHRONOUS VIBRATION WITH AND WITHOUT FLUID) of a high speed multistage axial compressor using rigid blade and vibrating blade with fluid blades of a high-speed compressor showing the frequency lock-in near the 1st torsional mode (1T) during

  14. Abstract--This paper presents ambient mechanical vibrations as an alternative source for energy harvesting, especially

    E-Print Network [OSTI]

    Kumar, Ratnesh

    Abstract--This paper presents ambient mechanical vibrations as an alternative source for energy harvesting, especially beneficial where alternatives such as light, wind, biomass and thermal energy are limited, e.g., powering underground sensors. Transduction of ambient kinetic energy, e.g., the vibrations

  15. Active vibration control of a fluid/plate system using a pole placement controller

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Active vibration control of a fluid/plate system using a pole placement controller Bogdan Robu reduction of the structural vibrations induced by the sloshing of large masses of fuel inside a partly full, published in "International Journal of Control 85, 6 (2012) 684-694" #12;Keywords Flexible system, fluid

  16. An hp adaptive strategy to compute the vibration modes of a fluid-solid coupled system

    E-Print Network [OSTI]

    Rodríguez, Rodolfo

    )], for the operational state, the fuel assembly in nuclear plants should be designed so that they cannot be unacceptablyAn hp adaptive strategy to compute the vibration modes of a fluid-solid coupled system M element method to solve a two- dimensional fluid-structure vibration problem. This problem arises from

  17. A digital vibrating magnetic gyrometer using a control motor DSP TMS320F243

    E-Print Network [OSTI]

    Baudoin, Geneviève

    A digital vibrating magnetic gyrometer using a control motor DSP TMS320F243 G. Baudoin(1) , O processing system to control a vibrating magnetic gyrometer (VMG). This low cost angular speed sensor has to the limitations of analog systems (temperature drift, noise, bias). A digital control and signal processing system

  18. Stresa, Italy, 25-27 April 2007 STEP-UP CONVERTER FOR ELECTROMAGNETIC VIBRATIONAL ENERGY

    E-Print Network [OSTI]

    Boyer, Edmond

    micro-machined vibration based power generator with diode based voltage multiplier (VM) circuits which the piezoceramic composite beam coupled with a flyback converter circuit and also derived the equivalent circuits and the EM vibration harvesting device. The measured and calculated results of the VM circuits for the

  19. Continuum modelling of piezoelectromechanical truss beams: an application to vibration damping

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    are connected to the electrical line so that their equivalent circuits are to be regarded as part of the modularContinuum modelling of piezoelectromechanical truss beams: an application to vibration damping F modular truss beam, electric transmission line, piezoelectromechanical coupling, vibration control 1

  20. Sensor-less Vibration Suppression and Scan Compensation for Piezoelectric Tube Nanopositioners

    E-Print Network [OSTI]

    Fleming, Andrew J.

    ) (b) Fig. 2. (a) Charge driven tube scanner. (b) Voltage equivalent circuit. introduces two simple nonSensor-less Vibration Suppression and Scan Compensation for Piezoelectric Tube Nanopositioners-fabrication. Much research has proceeded with the aim of reducing hysteresis and vibration, the foremost problems

  1. Transition state vibrational level thresholds for the dissociation of triplet ketene

    E-Print Network [OSTI]

    Kim, Sang Kyu

    Transition state vibrational level thresholds for the dissociation of triplet ketene Sang Kyu Kim of a unimolecular reaction is controlled by flux through quantized transition-state thresholds at each energy level­Ramsperger­Kassel­Marcus RRKM theory. The vibrational frequencies at the transition state obtained from the fits are compared

  2. Identifying damage locations under ambient vibrations utilizing vector autoregressive models and Mahalanobis distances

    E-Print Network [OSTI]

    Identifying damage locations under ambient vibrations utilizing vector autoregressive models Keywords: Damage location Ambient vibration Vector Autoregressive model Statistical pattern recognition Bridges Structural health monitoring a b s t r a c t This paper presents a study for identifying damage

  3. Vibrational Spectra of Water Solutions of Azoles from QM/MM Calculations: Effects of Solvation

    E-Print Network [OSTI]

    Guidoni, Leonardo

    the decomposition of the vibrational density of states of the gas phase and solution dynamics. The calculated shifts the structural and dynamical aspects of water solutions. X-ray as well as neutron diffraction are the main source and electronic structure of the molecule.1 We expect therefore that also its vibrational properties could

  4. Enhanced vibration energy harvesting using dual-mass systems Xiudong Tang, Lei Zuo n

    E-Print Network [OSTI]

    Zuo, Lei

    of Mechanical Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794, USA a r t i c l eEnhanced vibration energy harvesting using dual-mass systems Xiudong Tang, Lei Zuo n Department-mass vibration energy harvester, where two masses are connected in series with the energy transducer and spring

  5. Polymer surface and thin film vibrational dynamics of poly,,methyl methacrylate..., polybutadiene,

    E-Print Network [OSTI]

    Sibener, Steven

    Polymer surface and thin film vibrational dynamics of poly,,methyl methacrylate..., polybutadiene atom scattering has been used to investigate the vibrational dynamics at the polymer vacuum interface polymers. The broad multiphonon feature that arises in the inelastic scattering spectra at surface

  6. Simulating Vibrational Energy Flow in Proteins: Relaxation Rate and Mechanism for Heme Cooling in Cytochrome c

    E-Print Network [OSTI]

    Straub, John E.

    Simulating Vibrational Energy Flow in Proteins: Relaxation Rate and Mechanism for Heme Cooling dynamics simulation. The kinetic energy relaxation was found to be a biphasic exponential decay process in the heme protein myoglobin. Computer simulation of vibrational energy relaxation in heme proteins began

  7. Dynamics of Nanoscopic Water: Vibrational Echo and Infrared Pump-Probe Studies of Reverse Micelles

    E-Print Network [OSTI]

    Fayer, Michael D.

    Dynamics of Nanoscopic Water: Vibrational Echo and Infrared Pump-Probe Studies of Reverse MicellesVersity, Stanford, California 94305 ReceiVed: April 8, 2005; In Final Form: May 12, 2005 The dynamics of water of the hydrogen-bond network dynamics. Pump-probe experiments show that the vibrational lifetime of the OD stretch

  8. Micro-meter Crack Response to Rock Blast Vibrations, Wind Gusts & Weather Effects

    E-Print Network [OSTI]

    Micro-meter Crack Response to Rock Blast Vibrations, Wind Gusts & Weather Effects C. H. Dowding,1 effects. These measurements substantiate the conservancy of the 12.5 mm/s (0.5 in./s) blasting vibration blasting. Measurements in this case study now extend weather effects to include wind. While it has been

  9. Semilinear response for the heating rate of cold atoms in vibrating traps

    E-Print Network [OSTI]

    Cohen, Doron

    OFFPRINT Semilinear response for the heating rate of cold atoms in vibrating traps A. Stotland, D;Europhysics Letters (EPL) has a new online home at www.epljournal.org Take a look for the latest journal news.epljournal.org doi: 10.1209/0295-5075/86/10004 Semilinear response for the heating rate of cold atoms in vibrating

  10. Group Theoretical Analysis of the Vibrational and Electronic Spectrum of Benzene Frank Rioux

    E-Print Network [OSTI]

    Rioux, Frank

    Group Theoretical Analysis of the Vibrational and Electronic Spectrum of Benzene Frank Rioux CSB|SJU This tutorial deals with the interpretation of the vibrational and electronic spectra of benzene using group benzene's electrons. The symmetry of the relevant -electron molecular orbitals is determined by examining

  11. www.elsevier.com/locate/jsvi Journal of Sound and Vibration ] (

    E-Print Network [OSTI]

    Huston, Dryver R.

    at a reduced weight and cost when compared to present passive vibration damping systems. ECBs used of aerospace electronic systems. This includes bulky mounting fixtures, reinforcing ribs, and passive vibration to 10­15%. Also, the space required to house and mount the electronics would be significantly reduced

  12. Project Title: Older People's View of

    E-Print Network [OSTI]

    Hickman, Mark

    /AGECONCERN/10/NP Age Concern Canterbury provides support for older people, many of whom face loneliness, lowProject Title: Older People's View of Community Support Bachelor of Arts Internship Company information, support and advocacy, to enable older people in Canterbury to have real choices". (http

  13. CITY OF MOUNTAIN VIEW April 12, 2011 .

    E-Print Network [OSTI]

    Ordinance ordinance? Projected effective date: September 1, 2011 Green building or stand-alone energy Energy Ordinance in Combination with Green Building ordinance? Do minimum energy requirements increase No afterCITY OF MOUNTAIN VIEW April 12, 2011 . CaUfomia Energy Commission Attn: Joe Loyer 1516 Ninth

  14. Friction in full view A. P. Merklea

    E-Print Network [OSTI]

    Marks, Laurence D.

    Friction in full view A. P. Merklea and L. D. Marksb Materials Science and Engineering proposed friction mechanisms explaining the unique tribological properties of graphite. Wear of graphite chemical or struc- tural information from the interface during a friction experi- ment. Examples

  15. INVESTIGATION Retrospective View of North American Potato

    E-Print Network [OSTI]

    Douches, David S.

    INVESTIGATION Retrospective View of North American Potato (Solanum tuberosum L.) Breeding in the 20, Madison, Wisconsin, 53706 ABSTRACT Cultivated potato (Solanum tuberosum L.), a vegetatively propagated explore the effects of potato breeding at the genome level, we used 8303 single-nucleotide polymorphism

  16. On the Use of Non-Additive Entropy to Determine the Presence of Vibrations in the Videos of JET Cameras

    E-Print Network [OSTI]

    On the Use of Non-Additive Entropy to Determine the Presence of Vibrations in the Videos of JET Cameras

  17. Non-Equilibrium Vibrational Kinetics in Radiofrequency H2 Plasmas: a Comparison Between Theoretical and Experimental Results

    SciTech Connect (OSTI)

    Capitelli, M. [Department of Chemistry-University of Bari (Italy); IMIP CNR - Bari (Italy); De Pascale, O. [IMIP CNR - Bari (Italy); Shakatov, V. [Centro Laser s.r.l. - Valenzano (Italy); Hassouni, K.; Lombardi, G.; Gicquel, A. [LIMHP-CNRS Universite Paris Nord - Villetaneuse (France)

    2005-05-16T23:59:59.000Z

    Vibrational and rotational experimental temperatures of molecular hydrogen obtained by Coherent Anti-Stokes Spectroscopy (CARS) in Radiofrequency Inductive Plasmas have been analyzed and interpreted in terms of vibration, electron, dissociation-recombination and attachment kinetics. The analysis clarifies the role of atomic hydrogen and its heterogeneous recombination in affecting the vibrational content of the molecules.

  18. HIGH-VOLTAGE LOW POWER ANALOGUE-TO-DIGITAL CONVERSION FOR ADAPTIVE ARCHITECTURES OF CAPACITIVE VIBRATION ENERGY

    E-Print Network [OSTI]

    Boyer, Edmond

    VIBRATION ENERGY HARVESTERS R. Khalil1* , A. Dudka1 , D. Galayko1 , P. Basset2 1 University Paris 6, LIP6 harvester for vibration energy. A smart energy management in the harvester is needed to achieve an optimal conversion of the vibration energy. This block is achieved with a successive approximation analogue

  19. Contraindications and Potential Dangers of the Use of Vibration as a Treatment for Osteoporosis and other Musculoskeletal Diseases

    E-Print Network [OSTI]

    Contraindications and Potential Dangers of the Use of Vibration as a Treatment for Osteoporosis and perhaps curb osteoporosis. Just because some vibration may be beneficial, however, does not mean that a lot is better. Before considering vibration as an avenue of intervention for osteoporosis

  20. Environment and Protostellar Evolution

    E-Print Network [OSTI]

    Zhang, Yichen

    2014-01-01T23:59:59.000Z

    Even today in our Galaxy, stars form from gas cores in a variety of environments, which may affect the properties of resulting star and planetary systems. Here we study the role of pressure, parameterized via ambient clump mass surface density, on protostellar evolution and appearance, focussing on low-mass, Sun-like stars and considering a range of conditions from relatively low pressure filaments in Taurus, to intermediate pressures of cluster-forming clumps like the Orion Nebula Cluster (ONC), to very high pressures that may be found in the densest Infrared Dark Clouds (IRDCs) or in the Galactic Center (GC). We present unified analytic and numerical models for collapse of prestellar cores, accretion disks, protostellar evolution and bipolar outflows, coupled to radiative transfer (RT) calculations and a simple astrochemical model to predict CO gas phase abundances. Prestellar cores in high pressure environments are smaller and denser and thus collapse with higher accretion rates and efficiencies, resulting...

  1. Sustainable Environment Technologies (4578)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructureProposed Action Title: Sustainable Environment Technologies

  2. USED FUEL RAIL SHOCK AND VIBRATION TESTING OPTIONS ANALYSIS

    SciTech Connect (OSTI)

    Ross, Steven B.; Best, Ralph E.; Klymyshyn, Nicholas A.; Jensen, Philip J.; Maheras, Steven J.

    2014-09-29T23:59:59.000Z

    The objective of the rail shock and vibration tests is to complete the framework needed to quantify loads of fuel assembly components that are necessary to guide materials research and establish a technical basis for review organizations such as the U.S. Nuclear Regulatory Commission (NRC). A significant body of experimental and numerical modeling data exists to quantify loads and failure limits applicable to normal conditions of transport (NCT) rail transport, but the data are based on assumptions that can only be verified through experimental testing. The test options presented in this report represent possible paths for acquiring the data that are needed to confirm the assumptions of previous work, validate modeling methods that will be needed for evaluating transported fuel on a case-by-case basis, and inform material test campaigns on the anticipated range of fuel loading. The ultimate goal of this testing is to close all of the existing knowledge gaps related to the loading of used fuel under NCT conditions and inform the experiments and analysis program on specific endpoints for their research. The options include tests that would use an actual railcar, surrogate assemblies, and real or simulated rail transportation casks. The railcar carrying the cradle, cask, and surrogate fuel assembly payload would be moved in a train operating over rail track modified or selected to impart shock and vibration forces that occur during normal rail transportation. Computer modeling would be used to help design surrogates that may be needed for a rail cask, a cask’s internal basket, and a transport cradle. The objective of the design of surrogate components would be to provide a test platform that effectively simulates responses to rail shock and vibration loads that would be exhibited by state-of-the-art rail cask, basket, and/or cradle structures. The computer models would also be used to help determine the placement of instrumentation (accelerometers and strain gauges) on the surrogate fuel assemblies, cask and cradle structures, and the railcar so that forces and deflections that would result in the greatest potential for damage to high burnup and long-cooled UNF can be determined. For purposes of this report we consider testing on controlled track when we have control of the track and speed to facilitate modeling.

  3. Galaxy Evolution and Environment

    E-Print Network [OSTI]

    Pieter van Dokkum; Ryan Quadri

    2007-04-13T23:59:59.000Z

    The properties of galaxies are strongly correlated with their environment, with red galaxies dominating galaxy clusters and blue galaxies dominating the general field. However, not all field galaxies are young: studies of the colors, line strengths, and M/L ratios of massive early-type galaxies at 0environment. There is good evidence that the growth of these galaxies does continue longer in the field than in clusters, via (nearly) dissipationless mergers of already old galaxies. These results are consistent with predictions of recent galaxy formation models, which incorporate AGN feedback to suppress star formation in the most massive halos. Systematic studies of the relation of galaxies with their environment beyond z=1 are difficult, and still somewhat contradictory. Intriguingly both the DEEP2 and VVDS surveys find that the color-density relation disappears at z~1.3, unfortunately just at the point where both surveys become highly incomplete. On the other hand, clustering studies at z~2.5 have shown that red galaxies cluster more strongly than blue galaxies, implying that the color-density relation was already in place at that redshift.

  4. Lab 9 LabVIEW and GPIB LabVIEW (National Instruments)

    E-Print Network [OSTI]

    Glashausser, Charles

    Automatic data acquisition DAC 01010 Actuator, Heater... control Power amplifiers LabVIEW GPIB GPIB #12 Toolbar Retain Wire Values Button Step Function Buttons #12;Block Diagram Window Front Panel Window

  5. Ecology and environment What ecology and environment course is

    E-Print Network [OSTI]

    Sussex, University of

    Ecology and environment Essentials What ecology and environment course is there? Ecology 01273 876787 Why ecology and environment at Sussex? · You will be taught by lecturers who are leaders in research, with a broad range of experience and expertise including plant, bird and insect ecology, climate

  6. Chemometrics applied to vibrational spectroscopy: overview, challenges and pitfalls

    SciTech Connect (OSTI)

    Haaland, D.M.

    1996-10-01T23:59:59.000Z

    Chemometric multivariate calibration methods are rapidly impacting quantitative infrared spectroscopy in many positive ways. The combination of vibrational spectroscopy and chemometrics has been used by industry for quality control and process monitoring. The growth of these methods has been phenomenal in the past decade. Yet, as with any new technology, there are growing pains. The methods are so powerful at finding correlations in the data, that when used without great care they can readily yield results that are not valid for the analysis of future unknown samples. In this paper, the power of the multivariate calibration methods is discussed while pointing out common pitfalls and some remaining challenges that may slow the implementation of chemometrics in research and industry.

  7. Nature of the Frequency Shift of Hydrogen Valence Vibrations

    E-Print Network [OSTI]

    Zhyganiuk, I V

    2015-01-01T23:59:59.000Z

    The physical nature of a frequency shift of hydrogen valence vibrations in a water molecule due to its interaction with neighbor molecules has been studied. Electrostatic forces connected with the multipole moments of molecules are supposed to give a dominating contribution to the intermolecular interaction. The frequency shift was calculated in the case where two neighbor molecules form a dimer. The obtained result is in qualitative agreement with the frequency shifts observed for water vapor, hexagonal ice, and liquid water, as well as for aqueous solutions of alcohols. This fact testifies to the electrostatic nature of H-bonds used to describe both the specific features of the intermolecular interaction in water and the macroscopic properties of the latter.

  8. A nondeterministic shock and vibration application using polynomial chaos expansions

    SciTech Connect (OSTI)

    FIELD JR.,RICHARD V.; RED-HORSE,JOHN R.; PAEZ,THOMAS L.

    2000-03-28T23:59:59.000Z

    In the current study, the generality of the key underpinnings of the Stochastic Finite Element (SFEM) method is exploited in a nonlinear shock and vibration application where parametric uncertainty enters through random variables with probabilistic descriptions assumed to be known. The system output is represented as a vector containing Shock Response Spectrum (SRS) data at a predetermined number of frequency points. In contrast to many reliability-based methods, the goal of the current approach is to provide a means to address more general (vector) output entities, to provide this output as a random process, and to assess characteristics of the response which allow one to avoid issues of statistical dependence among its vector components.

  9. Imaging Nonequilibrium Atomic Vibrations with X-ray Diffuse Scattering

    SciTech Connect (OSTI)

    Trigo, M.; Chen, J.; Vishwanath, V.H.; /SLAC; Sheu, Y.M.; /Michigan U.; Graber, T.; Henning, R.; /U. Chicago; Reis, D; /SLAC /Stanford U., Appl. Phys. Dept.; ,

    2011-03-03T23:59:59.000Z

    We use picosecond x-ray diffuse scattering to image the nonequilibrium vibrations of the lattice following ultrafast laser excitation. We present images of nonequilibrium phonons in InP and InSb throughout the Brillouin-zone which remain out of equilibrium up to nanoseconds. The results are analyzed using a Born model that helps identify the phonon branches contributing to the observed features in the time-resolved diffuse scattering. In InP this analysis shows a delayed increase in the transverse acoustic (TA) phonon population along high-symmetry directions accompanied by a decrease in the longitudinal acoustic (LA) phonons. In InSb the increase in TA phonon population is less directional.

  10. Vibration-based energy harvesting with stacked piezoelectrets

    SciTech Connect (OSTI)

    Pondrom, P., E-mail: ppondrom@nt.tu-darmstadt.de [Institute for Telecommunications Technology, Technische Universität Darmstadt, Merckstr. 25, 64283 Darmstadt (Germany); System Reliability and Machine Acoustics SzM, Technische Universität Darmstadt, Magdalenenstr. 4, 64289 Darmstadt (Germany); Hillenbrand, J.; Sessler, G. M. [Institute for Telecommunications Technology, Technische Universität Darmstadt, Merckstr. 25, 64283 Darmstadt (Germany); Bös, J.; Melz, T. [System Reliability and Machine Acoustics SzM, Technische Universität Darmstadt, Magdalenenstr. 4, 64289 Darmstadt (Germany)

    2014-04-28T23:59:59.000Z

    Vibration-based energy harvesters with multi-layer piezoelectrets (ferroelectrets) are presented. Using a simple setup with nine layers and a seismic mass of 8?g, it is possible to generate a power up to 1.3?µW at 140?Hz with an input acceleration of 1g. With better coupling between seismic mass and piezoelectret, and thus reduced damping, the power output of a single-layer system is increased to 5?µW at 700?Hz. Simulations indicate that for such improved setups with 10-layer stacks, utilizing seismic masses of 80?g, power levels of 0.1 to 1 mW can be expected below 100?Hz.

  11. Free vibrations of U-shaped atomic force microscope probes

    SciTech Connect (OSTI)

    Rezaei, E.; Turner, J. A., E-mail: jaturner@unl.edu [Mechanical and Materials Engineering, W342 Nebraska Hall, University of Nebraska-Lincoln, Lincoln, Nebraska 68588 (United States)

    2014-05-07T23:59:59.000Z

    Contact resonance atomic force microscope (AFM) methods have been used to quantify the elastic and viscoelastic properties of a variety of materials such as polymers, ceramics, biological materials, and metals with spatial resolution on the order of tens of nanometers. This approach involves measurement of the resonant frequencies of the AFM probe both for the free case and the case for which the tip is in contact with a sample. Vibration models of the probe and tip-sample contact models are then used to determine the sample properties from the frequency behavior and to create images of the sample properties. This work has been primarily focused on rectangular, single-beam probes for which the vibration models are relatively simple. Recently, U-shaped AFM probes have been developed to allow local heating of samples and the resonances of these probes are much more complex. In this article, a simplified analytical model of these U-shaped probes is described. This three beam model includes two beams clamped at one end and connected with a perpendicular cross beam at the other end. The beams are assumed only to bend in flexure and twist but their coupling allows a wide range of possible dynamic behavior. Results are presented for the first ten modes and the mode shapes are shown to have complex coupling between the flexure and twisting of the beams, particularly for the higher modes. All resonant frequency results are in good agreement with finite element results for the three probe designs and two values of thickness considered (all wavenumbers are within 3.0%). This work is anticipated to allow U-shaped probes to be used eventually for quantitative measurements of sample material properties during heating using a contact resonance approach.

  12. View of software for HEP experiments

    SciTech Connect (OSTI)

    Johnstad, H.; Lebrun, P.; Lessner, E.S.; Montgomery, H.E.

    1986-05-01T23:59:59.000Z

    A view of the software structure typical of a High Energy Physics experiment is given and the availability of general software modules in most of the important regions is discussed. The aim is to provide a framework for discussion of capabilities and inadequecies and thereby define areas where effort should be assigned and perhaps also to serve as a useful source document for the newcomer to High Energy Physics. 74 refs.

  13. n CAPABILITY STATEMENT Environment and

    E-Print Network [OSTI]

    Liley, David

    and industrial research in chemistry, biology, environmental science and biotechnology. Our research is carried: environmental biotechnology and sustainability ­ bioremediation, water quality, microbial ecology and inorganicn CAPABILITY STATEMENT Environment and Biotechnology Centre Overview The Environment

  14. Painting in a sonic environment 

    E-Print Network [OSTI]

    Greated, Marianne

    2014-06-27T23:59:59.000Z

    The thesis explores how painting is affected by its sonic environment. The research stems from an artistic response to noise in the environment and how this can be explored through artistic practice. The boundaries of ...

  15. Guest Editors' Introduction: Hostile Environments

    E-Print Network [OSTI]

    Lukowicz, Paul

    Pervasive computing technology can save lives by both eliminating the need for humans to work in hostile environments and supporting them when they do. In general, environments that are hazardous to humans are hard on ...

  16. Thermal vibration of a rectangular single-layered graphene sheet with quantum effects

    SciTech Connect (OSTI)

    Wang, Lifeng, E-mail: walfe@nuaa.edu.cn; Hu, Haiyan [State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 210016 Nanjing (China)

    2014-06-21T23:59:59.000Z

    The thermal vibration of a rectangular single-layered graphene sheet is investigated by using a rectangular nonlocal elastic plate model with quantum effects taken into account when the law of energy equipartition is unreliable. The relation between the temperature and the Root of Mean Squared (RMS) amplitude of vibration at any point of the rectangular single-layered graphene sheet in simply supported case is derived first from the rectangular nonlocal elastic plate model with the strain gradient of the second order taken into consideration so as to characterize the effect of microstructure of the graphene sheet. Then, the RMS amplitude of thermal vibration of a rectangular single-layered graphene sheet simply supported on an elastic foundation is derived. The study shows that the RMS amplitude of the rectangular single-layered graphene sheet predicted from the quantum theory is lower than that predicted from the law of energy equipartition. The maximal relative difference of RMS amplitude of thermal vibration appears at the sheet corners. The microstructure of the graphene sheet has a little effect on the thermal vibrations of lower modes, but exhibits an obvious effect on the thermal vibrations of higher modes. The quantum effect is more important for the thermal vibration of higher modes in the case of smaller sides and lower temperature. The relative difference of maximal RMS amplitude of thermal vibration of a rectangular single-layered graphene sheet decreases monotonically with an increase of temperature. The absolute difference of maximal RMS amplitude of thermal vibration of a rectangular single-layered graphene sheet increases slowly with the rising of Winkler foundation modulus.

  17. Contaminants in Vadose Zone Environments

    SciTech Connect (OSTI)

    Wellman, Dawn M.; Freshley, Mark D.; Johnson, Timothy C.; Miracle, Ann L.

    2012-11-01T23:59:59.000Z

    Contaminants in vadose zone environments pose a long-term source and threat to groundwater resources, human health, and the environment. Several technical, regulatory, and policy challenges and opportunities are associated with contamination in vadose zone environments, particularly in remediation. In this special issue, ten papers present novel approaches to characterize, monitor, remediate, and predict the transport and fate of contaminants in vadose zone environments.

  18. QCD in Extreme Environments

    E-Print Network [OSTI]

    John B. Kogut

    2002-08-30T23:59:59.000Z

    I review present challenges that QCD in extreme environments presents to lattice gauge theory. Recent data and impressions from RHIC are emphasized. Physical pictures of heavy ion wavefunctions, collisions and the generation of the Quark Gluon Plasma are discussed, with an eye toward engaging the lattice and its numerical methods in more interaction with the experimental and phenomenological developments. Controversial, but stimulating scenarios which can be confirmed or dismissed by lattice methods are covered. In the second half of the talk, several promising developments presented at the conference Lattice 2002 are reviewed.

  19. Environment Induced Time Arrow

    E-Print Network [OSTI]

    Janos Polonyi

    2012-06-25T23:59:59.000Z

    The spread of the time arrows from the environment to an observed subsystem is followed within a harmonic model. A similarity is pointed out between irreversibility and a phase with spontaneously broken symmetry. The causal structure of interaction might be lost in the irreversible case, as well. The Closed Time Path formalism is developed for classical systems and shown to handle the time arrow problem in a clear and flexible manner. The quantum case is considered, as well, and the common origin of irreversibility and decoherence is pointed out.

  20. Environment Feature Stories

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasReleaseSpeeches EnergyActive for Life"Environment Feature

  1. Geoscience/Environment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasReleaseSpeechesHall ATours,DioxideGeoscience/Environment

  2. NERSC Modules Software Environment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated Codes |IsLove Your1AllocationsNOVA Portal:Ott2006.jpgEnvironment » Modules

  3. School of Environment and Sustainability

    E-Print Network [OSTI]

    Saskatchewan, University of

    School of Environment and Sustainability Room 323, Kirk Hall 117 Science Place Saskatoon, SK S7N 5C8 Telephone: (306) 966-1985 E-mail: sens.info@usask.ca Master of Environment and Sustainability (MES) Opportunity Sustainability Science in the Delta Dialogue Network The School of Environment and Sustainability

  4. Flow induced vibration of a cantilever column jet: a spectral analysis

    E-Print Network [OSTI]

    Shilling, Roy Bryant

    1978-01-01T23:59:59.000Z

    , both the pump and the test di scharge pipe were mounted on a carriage whiLh oscil]ated on the track above a water sump. They were connected from the suction end by two-inch I. D. gal- vanized pipe joined in the center by a 1. 5 inch orifice plate... SPECTRUM AT 3. 5 HZ, EMPTY PIPE . FORCED VIBRATION SPECTRUM AT 3. 5 HZ, 47 fps FLOW VELOCITY- FROCED VIBRATION SPECTRUM AT 4. 58 HZ EMPTY PIPE . FORCED VIBRATION SPECTRUM AT 4. 58 HZ 10 fps FLOW VELOCITY . MIDRANGE DYNAMICS . INTENSITY RESPONSE...

  5. Potential Effect of Interfacial Bonding on Used Nuclear Fuel Vibration Reliability

    SciTech Connect (OSTI)

    Wang, Jy-An John [ORNL; Jiang, Hao [ORNL; Wang, Hong [ORNL

    2014-01-01T23:59:59.000Z

    This summary abstract describes the methodology used to evaluate the effect of pellet pellet and pellet clad interactions with consideration of the interfacial bonding efficiency on UNF vibration integrity. This methodology provides a solid roadmap for further protocol development with respect to effective lifetime prediction of a UNF system under normal transportation vibration. The proposed methodology that couples FEA simulations and experimental exploration efforts is also under development. The current methodology is focused on assessing the influence of interfacial bonding at the pellet pellet and the pellet clad interfaces on UNF vibration integrity. The FEA simulation results were also calibrated and benchmarked with the fatigue aging data obtained from reversible bending fatigue testing.

  6. eSales Interactive Mapping -Viewing and Printing Introduction

    E-Print Network [OSTI]

    eSales Interactive Mapping - Viewing and Printing Introduction Our eSales system includes an integrated interactive map facility. This allows you to view and print maps for all lots on offer. Various

  7. Cellulosic Biofuels: Expert Views on Prospects for Advancement: Supplementary Material

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Cellulosic Biofuels: Expert Views on Prospects for Advancement: Supplementary Material Erin Baker Keywords: Biofuels; Technology R&D; Uncertainty; Environmental policy 2 #12;1 Introduction This paper contains supplementary material for "Cellulosic Biofuels: Expert Views on Prospects for Advancement

  8. Better Buildings Network View | July-August 2014 | Department...

    Energy Savers [EERE]

    July-August 2014 Better Buildings Network View | July-August 2014 The Better Buildings Network View monthly newsletter from the U.S. Department of Energy's Better Buildings...

  9. Alternative Views on Knowledge: Presentation of Open Learner Models

    E-Print Network [OSTI]

    Bull, Susan

    a learner with a graphical view of their Bayesian learner model. STyLE-OLM [2] works with the learner

  10. Magic Lenses for Revealing Device Interactions in Smart Environments (demo abstract)

    E-Print Network [OSTI]

    devices in the camera's field of view. Keywords: Smart Environment, Web of Things, Network Man- agement, a storage back-end to persist recorded messages, and a magic lens-like [Bier et al. 1993] handheld user et al. 2013] where underground tubing is visualized using an aug- mented reality application

  11. COMMUNICATION www.MaterialsViews.com

    E-Print Network [OSTI]

    Wang, Zhong L.

    ,[3] biomass,[4] tide,[5] and wind.[6] As one of the most common energy in our living environment in the same space that contributes to the increase in the transferred charge quantity in the circuit. For a 3D.4 W m-2, a maxiumum charge transfer quantity of 2.6 µC, with a sliding displacement of 15 mm

  12. ANL-85-51 ANL-85-51 FLOW-INDUCED VIBRATION OF CIRCULAR CYLINDRICAL...

    Office of Scientific and Technical Information (OSTI)

    leakage signaled the beginning of a troublesome period for a series of 1-3 Table i.l U.S. Power Reactor Field Experience with Flow-induced Vibration Year Reactor Type Component...

  13. The low frequency 2D vibration sensor based on flat coil element

    SciTech Connect (OSTI)

    Djamal, Mitra; Sanjaya, Edi; Islahudin; Ramli [Department of Physics, Institut Teknologi Bandung, Jl. Ganesa 10 Bandung 40116 (Indonesia); Department of Physics, Institut Teknologi Bandung, Jl. Ganesa 10 Bandung 40116 (Indonesia) and Department of Physics, UIN Syarif Hidayatullah, Jl. Ir.H. Djuanda 95 Ciputat 15412 (Indonesia); MTs NW Nurul Iman Kembang Kerang, Jl. Raya Mataram - Lb.Lombok, NTB (Indonesia); Department of Physics, Institut Teknologi Bandung, Jl. Ganesa 10 Bandung 40116 (Indonesia) and Department of Physics,Universitas Negeri Padang, Jl. Prof. Hamka, Padang 25132 (Indonesia)

    2012-06-20T23:59:59.000Z

    Vibration like an earthquake is a phenomenon of physics. The characteristics of these vibrations can be used as an early warning system so as to reduce the loss or damage caused by earthquakes. In this paper, we introduced a new type of low frequency 2D vibration sensor based on flat coil element that we have developed. Its working principle is based on position change of a seismic mass that put in front of a flat coil element. The flat coil is a part of a LC oscillator; therefore, the change of seismic mass position will change its resonance frequency. The results of measurements of low frequency vibration sensor in the direction of the x axis and y axis gives the frequency range between 0.2 to 1.0 Hz.

  14. Microscopic derivation of nuclear rotation-vibration model, axially symmetric case

    E-Print Network [OSTI]

    Gulshani, Parviz

    2015-01-01T23:59:59.000Z

    We derive from first principles the successful phenomenological hydrodynamic model of Bohr-Davydov-Faessler-Greiner for rotation-vibration motion of an axially symmetric deformed nucleus. The derivation is not limited to small oscillation amplitude, and provides microscopic expressions for the interaction operators among the rotation, vibration, and intrinsic motions, for the moment of inertia, vibration mass, and for the deformation variables. The method uses canonical transformations to collective co-ordinates, followed by a constrained variational method, with the associated constraints imposed on the wavefunction rather than on the particle co-ordinates. The approach yields three self-consistent, time-reversal invariant, cranking-type Schrodinger equations for the rotation-vibration and intrinsic motions, and a self-consistency equation. For deformed harmonic oscillator mean-field potentials, these equations are solved in closed forms for the energies, moments of inertia, quadrupole moments and transition...

  15. Nonlinear plate vibrations: A modal approach with application to cymbals and gongs

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Nonlinear plate vibrations: A modal approach with application to cymbals and gongs M. Ducceschia- sides in their ability to simulate the sound of more realis- tic percussive instruments such as gongs

  16. Dynamic failure prediction of cross-rolled beryllium sheets subjected to vibration loads

    E-Print Network [OSTI]

    Serna, Oscar R.

    1996-01-01T23:59:59.000Z

    The principal objective of this investigation is to develop and verify a numerical method for prediction of failure for cross-rolled beryllium sheet structures that are subjected to vibration loads. To this end, complementary laboratory experiments...

  17. Design of a non-contact vibration measurement and analysis system for electronic board testing

    E-Print Network [OSTI]

    Arn, Krissa Elizabeth, 1980-

    2004-01-01T23:59:59.000Z

    Traditional vibration measurement methods involve placing accelerometers at discrete locations on a test object. In cases where the test specimen is small in mass, the addition of these measurement transducers can alter ...

  18. A Lyapunov Exponent Approach for Identifying Chaotic Behavior in a Finite Element Based Drillstring Vibration Model

    E-Print Network [OSTI]

    Mongkolcheep, Kathira

    2010-10-12T23:59:59.000Z

    The purpose of this work is to present a methodology to predict vibrations of drilllstrings for oil recovery service. The work extends a previous model of the drill collar between two stabilizers in the literature to include drill collar flexibility...

  19. Usage of Friction-damped Braced Frames for Seismic Vibration Control

    E-Print Network [OSTI]

    Fink, Brynnan 1992-

    2012-04-16T23:59:59.000Z

    This study presents the results of experimental work that examines the functionality of friction-damped braced frames during seismic events. The simplicity and efficacy of this friction device as a means of passive vibration control suggest...

  20. Vibration suppression of laminated composite plates using embedded smart material layers

    E-Print Network [OSTI]

    Krishnan, Sivasubramaniam

    2000-01-01T23:59:59.000Z

    In this study, a complete theoretical formulation of laminated composite plates with integrated smart material layers that serve as sensors and/or actuators is presented for the vibration suppression of laminated composite plates. The third...

  1. Vibration Suppression and Flywheel Energy Storage in a Drillstring Bottom-Hole-Assembly

    E-Print Network [OSTI]

    Saeed, Ahmed

    2012-07-16T23:59:59.000Z

    , and environmental disposal. Extreme and harsh downhole conditions necessitate that the flywheel module withstands temperatures and pressures exceeding 300 ?F and 20 kpsi, respectively, as well as violent vibrations encountered during drilling. Moreover, the flywheel...

  2. Suitability of Shape Memory Alloys for vibration isolation with application to launch vehicle payloads

    E-Print Network [OSTI]

    Mayes, John Jeramy

    2001-01-01T23:59:59.000Z

    This work details an investigation into the suitability of Shape Memory Alloys for the task of vibration isolation based on the similarities between the Shape Memory Alloy pseudoelastic behavior and the softening response of isolators whose response...

  3. Vibration sensors utilizing fiber fabry-perot interferometers and permanent magnets

    E-Print Network [OSTI]

    Conkey, Andrew P.

    2009-05-15T23:59:59.000Z

    A unique set of vibration sensors was designed that incorporate the fiber Fabry-Perot interferometer (FFPI) and permanent magnets. Feasibility of the design and its advantages over traditional sensors were verified by experiments. The new sensors...

  4. Spectroscopic investigations of the vibrational potential energy surfaces in electronic ground and excited states

    E-Print Network [OSTI]

    Yang, Juan

    2007-09-17T23:59:59.000Z

    The vibrational potential energy surfaces in electronic ground and excited states of several ring molecules were investigated using several different spectroscopic methods, including far-infrared (IR), Raman, ultraviolet (UV) absorption...

  5. Effects of Induced Acoustic Vibrations on Droplet Shedding on Hybrid Micro-structured Surfaces

    E-Print Network [OSTI]

    Lai, Chen-Ling

    2014-04-28T23:59:59.000Z

    . In an effort to circumvent the pinning effect, a vibration-induced droplet shedding method has been explored to overcome contact angle hysteresis and facilitate droplet shedding at lower rolling angles. To understand the effects of hybrid surface morphology...

  6. Experimental Investigations of Vortex Induced Vibration of A Flat Plate in Pitch Oscillation

    E-Print Network [OSTI]

    Yang, Yi

    2012-02-14T23:59:59.000Z

    A bluff structure placed in a flowing fluid, may be subjected to vortex-induced vibrations (VIV). For a flat plate with only rotational degree of freedom, the VIV is rotational oscillation. Based on the experimental investigation, vortex...

  7. Vibrational and Theoretical Investigations of Molecular Conformations and Intramolecular pi-Type Hydrogen Bonding

    E-Print Network [OSTI]

    Ocola, Esther

    2012-02-14T23:59:59.000Z

    The molecular conformations, potential energy functions and vibrational spectra of several cyclic molecules have been investigated by ab initio and density functional theory calculations and by infrared and Raman spectroscopy. The ab initio...

  8. Vibration-to-electric energy conversion using a mechanically-varied capacitor

    E-Print Network [OSTI]

    Yen, Bernard Chih-Hsun, 1981-

    2005-01-01T23:59:59.000Z

    Past research in vibration energy harvesting has focused on the use of variable capacitors, magnets, or piezoelectric materials as the basis of energy transduction. How- ever, few of these studies have explored the detailed ...

  9. Effect of traveling waves on Vortex-Induced Vibration of long flexible cylinders

    E-Print Network [OSTI]

    Jaiswal, Vivek, Ph. D. Massachusetts Institute of Technology

    2009-01-01T23:59:59.000Z

    Offshore marine risers and pipelines, exposed to ocean currents, are susceptible to Vortex-Induced Vibration (VIV). Accurate prediction of VIV is necessary for estimating the fatigue life as well as for taking corrective ...

  10. Spectroscopic investigation of the vibrational quasi-continuum arising from internal rotation of a methyl group

    SciTech Connect (OSTI)

    Hougen, J.T. [NIST, Gaithersburg, MD (United States)

    1993-12-01T23:59:59.000Z

    The goal of this project is to use spectroscopic techniques to investigate in detail phenomena involving the vibrational quasi-continuum in a simple physical system. Acetaldehyde was chosen for the study because: (i) methyl groups have been suggested to be important promotors of intramolecular vibrational relaxation, (ii) the internal rotation of a methyl group is an easily describle large-amplitude motion, which should retain its simple character even at high levels of excitation, and (iii) the aldehyde carbonyl group offers the possibility of both vibrational and electronic probing. The present investigation of the ground electronic state has three parts: (1) understanding the {open_quotes}isolated{close_quotes} internal-rotation motion below, at, and above the top of the torsional barrier, (2) understanding in detail traditional (bond stretching and bending) vibrational fundamental and overtone states, and (3) understanding interactions involving states with multiquantum excitations of at least one of these two kinds of motion.

  11. Three Phase Erosion Testing and Vibration Analysis of an Electrical Submersible Pump

    E-Print Network [OSTI]

    Zheng, Dezhi

    2014-01-13T23:59:59.000Z

    a crucial problem of slurry erosion which may affect life and cost significantly. The wear caused by slurry erosion may bring the issue such as unbalanced side loads, severe vibration and decreased pressure head. Eventually, this phenomenon will lead...

  12. Production of a beam of highly vibrationally excited CO using perturbations

    E-Print Network [OSTI]

    Bartels, Nils

    An intense molecular beam of CO (X[superscript 1]?[superscript +]) in high vibrational states (v = 17, 18) was produced by a new approach that we call PUMP – PUMP – PERTURB and DUMP. The basic idea is to access high ...

  13. Design of compliant mechanisms for attenuation of unidirectional vibrations in rotational systems

    E-Print Network [OSTI]

    Szczesny, Spencer E., 1981-

    2005-01-01T23:59:59.000Z

    The purpose of this research was to generate the knowledge required to design compliant mechanisms that (1) attenuate undesired small-motion angular vibrations in rotational power transmission systems and (2) preserve the ...

  14. Vortex-induced vibration of marine risers : motion and force reconstruction from field and experimental data

    E-Print Network [OSTI]

    Mukundan, Harish

    2008-01-01T23:59:59.000Z

    Vortex-induced vibration (VIV) of long flexible cylindrical structures enduring ocean currents is ubiquitous in the offshore industry. Though significant effort has gone into understanding this complicated fluid-structure ...

  15. Vortex-induced vibration of flexible cylinders in time-varying flows

    E-Print Network [OSTI]

    Resvanis, Themistocles L

    2014-01-01T23:59:59.000Z

    This thesis investigates two aspects of Vortex-Induced Vibrations (VIV) on long flexible cylinders. The work is split into a minor and major part. The minor part addresses the effect of Reynolds number on flexible cylinder ...

  16. Proceedings of the Fourteenth International Conference on Time-Resolved Vibrational Spectroscopy (TRVS XIV)

    E-Print Network [OSTI]

    Tokmakoff, Andrei

    2011-08-31T23:59:59.000Z

    Abstracts of presentations made at the Fourteenth International Conference on Time-Resolved Vibrational Spectroscopy (TRVS XIV) held May 9-14, 2009 in Meredith, New Hampshire. TRVS is a series of biennial conferences ...

  17. Unsteady momentum fluxes in two-phase flow and the vibration of nuclear reactor components

    E-Print Network [OSTI]

    Yih, Tien Sieh

    1968-01-01T23:59:59.000Z

    The steady and unsteady components of the momentum flux in a twophase flow have been measured at the exit of a vertical pipe. Measured momentum flux data has been machine processed by standard random vibration techniques ...

  18. A tale of coupled vibrations in solution told by coherent two-dimensional infrared spectroscopy

    E-Print Network [OSTI]

    Khalil, Munira, 1975-

    2004-01-01T23:59:59.000Z

    Coherent two-dimensional infrared (2D IR) spectroscopy is used as a tool for investigating the molecular structure and dynamics of coupled vibrations in solution on a picosecond timescale. The strongly coupled asymmetric ...

  19. Vortex Induced Vibrations of cylinders : experiments in reducing drag force and amplitude of motion

    E-Print Network [OSTI]

    Farrell, David Emmanuel

    2007-01-01T23:59:59.000Z

    Reducing the deleterious effect of Vortex Induced Vibrations (VIV) in marine risers is an important task for ocean engineers; and many competing factors exist in the design of VIV suppression devices. This thesis explores ...

  20. Vortex-induced vibrations of a long flexible cylinder in shear flow

    E-Print Network [OSTI]

    Triantafyllou, Michael S.

    We investigate the in-line and cross-flow vortex-induced vibrations of a long cylindrical tensioned beam, with length to diameter ratio L/D = 200, placed within a linearly sheared oncoming flow, using three-dimensional ...

  1. Multicomponent stimulus interactions observed in basilar-membrane vibration in the basal region

    E-Print Network [OSTI]

    Czajkowski, Cynthia

    of the chinchilla cochlea William S. Rhodea) and Alberto Recio Department of Physiology, University of Wisconsin-membrane vibration at the 3­4-mm region of the chinchilla cochlea with a characteristic frequency between 6.5 and 8

  2. Loop Quantum Gravity: An Inside View

    E-Print Network [OSTI]

    Thomas Thiemann

    2006-08-29T23:59:59.000Z

    This is a (relatively) non -- technical summary of the status of the quantum dynamics in Loop Quantum Gravity (LQG). We explain in detail the historical evolution of the subject and why the results obtained so far are non -- trivial. The present text can be viewed in part as a response to an article by Nicolai, Peeters and Zamaklar [hep-th/0501114]. We also explain why certain no go conclusions drawn from a mathematically correct calculation in a recent paper by Helling et al [hep-th/0409182] are physically incorrect.

  3. Better Buildings Network View, March 2015

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny: The FutureCommentsEnergy Christopher|for1, 20114, 2013Better NewsNetwork View

  4. TotalView | Argonne Leadership Computing Facility

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron Spin Transition in2, 2003Tool ofTopo II:7.1 7.0 8.04.2 7.6 16.6TotalView

  5. Lake View Geothermal Facility | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf Kilauea Volcano, Hawaii9969995°,ILEDSGP/joinHavasuPalmdaleLake View

  6. View from the Bridge | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your DensityEnergy U.S.-China Electric Vehicle and03/02Report | DepartmentTRUVictor Der About Us VictorView

  7. On the ro-vibrational energies for the lithium dimer; maximum-possible rotational levels

    E-Print Network [OSTI]

    Omar Mustafa

    2015-03-02T23:59:59.000Z

    The Deng-Fan potential is used to discuss the reliability of the improved Greene-Aldrich approximation and the factorization recipe of Badawi et al.'s [17] for the central attractive/repulsive core. The factorization recipe is shown to be a more reliable approximation and is used to obtain the ro-vibrational energies for the lithium dimer. For each vibrational state only a limited number of the rotational levels are found to be supported by the lithium dimer.

  8. A comparative study of vibrational relaxation models for the aeroassisted orbital transfer vehicle flight regime

    E-Print Network [OSTI]

    Green, Derek Scott

    1991-01-01T23:59:59.000Z

    A COMPARATIVE STUDY OF VIBRATIONAL RELAXATION MODELS FOR AEROASSISTED ORBITAL TRANSFER VEHICLE FLIGHT REGIME A Thesis by DEREK SCOTI' GREEN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 1991 Major Subject: Aerospace Engineering A COMPARATIVE STUDY OF VIBRATIONAL RELAXATION MODELS FOR AEROASSISTED ORBITAL TRANSFER VEHICLE FLIGHT REGIME A Thesis by DEREK SCOTT GREEN Approved...

  9. A comparative study of vibrational relaxation and chemical reaction models for the Martian entry vehicle

    E-Print Network [OSTI]

    Koteshwar, Rajeev

    1992-01-01T23:59:59.000Z

    A COMPARATIVE STUDY OF VIBRATIONAL RELAXATION AND CHEMICAL REACTION MODELS FOR THE MARTIAN ENTRY VEHICLE A Thesis by RAJEEV KOTESHWAR Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 1992 Major Subject: Aerospace Engineering A COMPARATIVE STUDY OF VIBRATIONAL RELAXATION AND CHEMICAL REACTION MODELS FOR THE MARTIAN ENTRY VEHICLE A Thesis by RAJEEV KOTESHWAR Approved as to style...

  10. Analysis and experimental study of a plate-type hydraulic vibration damper for cryogenic rotating machinery

    E-Print Network [OSTI]

    Olan, Emmanuel Angustia

    1991-01-01T23:59:59.000Z

    ANALYSIS AND EXPERIMENTAL STUDY OF A PLATE-TYPE HYDRAULIC VIBRATION DAMPER FOR CRYOGENIC ROTATING MACHINERY A Thesis by EMMANUEL ANGUSTIA OLAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1991 Major Subject: Mechanical Engineering ANALYSIS AND EXPERIMENTAL STUDY OF A PLATE-TYPE HYDRAULIC VIBRATION DAMPER FOR CRYOGENIC ROTATING MACHINERY A Thesis by EMMANUEL ANGUSTIA OLAN Approved...

  11. Evaluation of Transportation Vibration Associated with Relocation of Work in Process As Part of KCRIMS

    SciTech Connect (OSTI)

    Hartwig, Troy

    2013-04-01T23:59:59.000Z

    During relocation of the Kansas City Plant (KCP) from the site at Bannister Road to the site at Botts Road, work in process (WIP) within a production department must be transported. This report recommends packaging to mitigate vibration levels experienced by products during between-facility transportation. Measurements and analysis demonstrate that this mitigation results in vibration levels less than those experienced by the product during routine production processes within potentially damaging frequency ranges.

  12. Effect of age on vibration sensitivity and motor nerve conduction among females

    E-Print Network [OSTI]

    Crumpton, Lesia LaWon

    1990-01-01T23:59:59.000Z

    EFFECT OF AGE ON VIBRATION SENSITIVITY AND MOTOR NERVE CONDUCTION AMONG FEMALES A Thesis by LES IA LA WON CRUMPTON Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1990 Major Subject: Industrial Engineering EFFECT OF AGE ON VIBRATION SENS~ AND MOTOR NERVE CONDUCTION AlvIONG FEMALES A Thesis by LESIA LAWON CRUMPTON Approved as to style and content by: erome J. nglet (Chair...

  13. Vibration responses of h-BN sheet to charge doping and external strain

    SciTech Connect (OSTI)

    Yang, Wei; Yang, Yu; Zheng, Fawei [Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)] [Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Zhang, Ping, E-mail: zhang-ping@iapcm.ac.cn [Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China) [Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Beijing Computational Science Research Center, Beijing 100084 (China)

    2013-12-07T23:59:59.000Z

    Based on density functional theory and density functional perturbation theory calculations, we systematically investigate the vibration responses of h-BN sheet to charge doping and external strains. It is found that under hole doping, the phonon frequencies of the ZO and TO branches at different wave vector q shift linearly with different slopes. Under electron doping, although the phonon frequencies shift irregularly, the shifting values are different at different phonon wave vectors. Interestingly, we find that external strain can restrain the irregular vibration responses of h-BN sheet to electron doping. The critical factor is revealed to be the relative position of the nearly free electron and boron p{sub z} states of h-BN sheet. Under external strains, the vibration responses of h-BN sheet are also found to be highly dependent on the phonon branches. Different vibration modes at different q points are revealed to be responsible for the vibration responses of h-BN sheet to charge doping and external strain. Our results point out a new way to detect the doping or strain status of h-BN sheet by measuring the vibration frequencies at different wave vector.

  14. Flow-induced tube vibration thresholds in heat exchangers from shellside water tests

    SciTech Connect (OSTI)

    Halle, H.; Chenoweth, J.M.; Wambsganss, M.W.

    1984-01-01T23:59:59.000Z

    Typical industrial shell-and-tube heat exchanger configurations are investigated experimentally for the occurrence of potentially damaging tube vibration as a function of flowrate. The effort is part of a program to develop vibration avoidance criteria to be integrated and optimized with the advanced thermal, hydraulic, and mechanical design methods now available. The tests use a 0.6-m (2-ft)-diameter, 3.7-m (12-ft)-long shell containing a removable tube bundle whose components are readily rearranged or replaced. The 15 different full tube bundle configurations tested represent various combinations of parameters: triangular or square tube layout patterns with different orientations to the flow, number of crosspasses, sizes of nozzles, plain or finned tubes. All bundles have 19-mm (0.75-in.)-diameter tubes spaced with a pitch-to-diameter ratio of 1.25. The heat exchanger is tested with waterflow on the shellside to determine a critical threshold, above which a small increase in the flowrate initiates a fluidelastic instability resulting in large amplitude vibration. The test conditions, the critical flowrates, the vibration frequencies, and the locations of the tubes most susceptible to vibration are presented. The given data are used for a comparison with a presently recognized method of vibration prediction and will permit updated evaluations as more advanced methods become available in the future.

  15. Low frequency long duration blast vibrations and their effect on residential structures

    SciTech Connect (OSTI)

    Roy, M.P.; Sirveiya, A.K.; Singh, P.K. [Central Mining Research Institute, Dhanbad (India). Blasting Dept.

    2005-07-01T23:59:59.000Z

    A study was conducted at a coal mine in India which produces 10 million tonne of coal and 27 million cubic meter of overburden per annum. Detonation of 100 tonnes of explosives in a blasting round is a common practice of the mine. These large sized blasts often led to complaints from the nearby inhabitants regarding ground vibrations and their affects on their houses. Eighteen dragline blasts were conducted and their impacts on nearby structures were investigated. Extended seismic arrays were used to identify the vibration characteristics within a few tens of meters of the blasts and also as modified by the media at distances over 5 km. 10 to 12 seismographs were deployed in an array to gather the time histories of vibrations. A signature blast was conducted to know the fundamental frequency of the particular transmitting media between the blast face and the structures. The faster decay of high frequency components was observed. It was also observed that at distances of 5 km, the persistence of vibrations in the structures was substantially increased by more than 10 seconds. The proximity of the frequency of the ground vibration to the structure's fundamental frequencies produced the resonance in the structures. On the basis of the fundamental frequency of the structures, the delay interval was optimized, which resulted in lower amplitude and reduced persistence of vibration in the structures. 9 refs., 10 figs., 2 tabs.

  16. Couplings between dipole and quadrupole vibrations in tin isotopes

    E-Print Network [OSTI]

    Cédric Simenel; Philippe Chomaz

    2009-12-11T23:59:59.000Z

    We study the couplings between collective vibrations such as the isovector giant dipole and isoscalar giant quadrupole resonances in tin isotopes in the framework of the time-dependent Hartree-Fock theory with a Skyrme energy density functional. These couplings are a source of anharmonicity in the multiphonon spectrum. In particular, the residual interaction is known to couple the isovector giant dipole resonance with the isoscalar giant quadrupole resonance built on top of it, inducing a nonlinear evolution of the quadrupole moment after a dipole boost. This coupling also affects the dipole motion in a nucleus with a static or dynamical deformation induced by a quadrupole constraint or boost respectively. Three methods associated with these different manifestations of the coupling are proposed to extract the corresponding matrix elements of the residual interaction. Numerical applications of the different methods to 132Sn are in good agreement with each other. Finally, several tin isotopes are considered to investigate the role of isospin and mass number on this coupling. A simple 1/A dependence of the residual matrix elements is found with no noticeable contribution from the isospin. This result is interpreted within the Goldhaber-Teller model.

  17. Vibrational spectroscopy for online monitoring of extraction solvent degradation products

    SciTech Connect (OSTI)

    Peterson, J.; Robinson, T.; Bryan, S.A.; Levitskaia, T.G. [Pacific Northwest National Laboratory, 902 Battelle Blvd, PO Box 999, MSIN P7-25 Richland, WA 99352 (United States)

    2013-07-01T23:59:59.000Z

    In our research, we are exploring the potential of online monitoring of the organic solvents for the flowsheets relevant to the used nuclear fuel reprocessing and tributyl phosphate (TBP)- based extraction processes in particular. Utilization of vibrational spectroscopic techniques permits the discrimination of the degradation products from the primary constituents of the loaded extraction solvent. Multivariate analysis of the spectral data facilitates development of the regression models for their quantification in real time and potentially enables online implementation of a monitoring system. Raman and FTIR spectral databases were created and used to develop the regression partial least squares (PLS) chemometric models for the quantitative prediction of HDBP (dibutyl phosphoric acid) degradation product, TBP, and UO{sub 2}{sup 2+} extraction organic product phase. It was demonstrated that both these spectroscopic techniques are suitable for the quantification of the Purex solvent components in the presence of UO{sub 2}(NO{sub 3}){sub 2}. Developed PLS models successfully predicted HDBP and TBP organic concentrations in simulated Purex solutions.

  18. Determination of stepsize parameters for intermolecular vibrational energy transfer

    SciTech Connect (OSTI)

    Tardy, D.C.

    1992-03-01T23:59:59.000Z

    Intermolecular energy transfer of highly excited polyatomic molecules plays an important role in many complex chemical systems: combustion, high temperature and atmospheric chemistry. By monitoring the relaxation of internal energy we have observed trends in the collisional efficiency ({beta}) for energy transfer as a function of the substrate's excitation energy and the complexities of substrate and deactivator. For a given substrate {beta} increases as the deactivator's mass increase to {approximately}30 amu and then exhibits a nearly constant value; this is due to a mass mismatch between the atoms of the colliders. In a homologous series of substrate molecules (C{sub 3}{minus}C{sub 8}) {beta} decreases as the number of atoms in the substrate increases; replacing F with H increases {beta}. All substrates, except for CF{sub 2}Cl{sub 2} and CF{sub 2}HCl below 10,000 cm{sup {minus}1}, exhibited that {beta} is independent of energy, i.e. <{Delta}E>{sub all} is linear with energy. The results are interpreted with a simple model which considers that {beta} is a function of the ocillators energy and its vibrational frequency. Limitations of current approximations used in high temperature unimolecular reactions were evaluated and better approximations were developed. The importance of energy transfer in product yields was observed for the photoactivation of perfluorocyclopropene and the photoproduction of difluoroethyne. 3 refs., 18 figs., 4 tabs.

  19. Alaska Forum on the Environment

    Broader source: Energy.gov [DOE]

    The Alaska Forum on the Environment is Alaska's largest statewide gathering of environmental professionals from government agencies, non-profit and for-profit businesses, community leaders, Alaskan...

  20. Alaska Forum on the Environment

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Alaska Forum on the Environment (AFE) is Alaska's largest statewide gathering of environmental professionals from government agencies, non-profit and for-profit businesses, community leaders,...

  1. Stretched Polymers in Random Environment

    E-Print Network [OSTI]

    Dmitry Ioffe; Yvan Velenik

    2011-03-01T23:59:59.000Z

    We survey recent results and open questions on the ballistic phase of stretched polymers in both annealed and quenched random environments.

  2. Environments Journal of Arid Environments 67 (2006) 142156

    E-Print Network [OSTI]

    Nacional de San Luis, Universidad

    2006-01-01T23:59:59.000Z

    Journal of Arid Environments Journal of Arid Environments 67 (2006) 142­156 Carbon sequestration, afforestation added $50% more C to the initial ecosystem carbon pool, with annual sequestration rate ranging 0 and suitable for tree planting, afforesting this area could result in a carbon sequestration rate of 1.7 Tg C

  3. Fast neutron environments.

    SciTech Connect (OSTI)

    Buchheit, Thomas Edward; Kotula, Paul Gabriel; Lu, Ping; Brewer, Luke N. (Naval Postgraduate School, Monterey, CA); Goods, Steven Howard (Sandia National Laboratories, Livermore, CA); Foiles, Stephen Martin; Puskar, Joseph David; Hattar, Khalid Mikhiel; Doyle, Barney Lee; Boyce, Brad Lee; Clark, Blythe G.

    2011-10-01T23:59:59.000Z

    The goal of this LDRD project is to develop a rapid first-order experimental procedure for the testing of advanced cladding materials that may be considered for generation IV nuclear reactors. In order to investigate this, a technique was developed to expose the coupons of potential materials to high displacement damage at elevated temperatures to simulate the neutron environment expected in Generation IV reactors. This was completed through a high temperature high-energy heavy-ion implantation. The mechanical properties of the ion irradiated region were tested by either micropillar compression or nanoindentation to determine the local properties, as a function of the implantation dose and exposure temperature. In order to directly compare the microstructural evolution and property degradation from the accelerated testing and classical neutron testing, 316L, 409, and 420 stainless steels were tested. In addition, two sets of diffusion couples from 316L and HT9 stainless steels with various refractory metals. This study has shown that if the ion irradiation size scale is taken into consideration when developing and analyzing the mechanical property data, significant insight into the structural properties of the potential cladding materials can be gained in about a week.

  4. Market Design Test Environments

    SciTech Connect (OSTI)

    Widergren, Steven E.; Sun, Junjie; Tesfatsion, Leigh

    2006-06-18T23:59:59.000Z

    Power industry restructuring continues to evolve at multiple levels of system operations. At the bulk electricity level, several organizations charged with regional system operation are implementing versions of a Wholesale Power Market Platform (WPMP) in response to U.S. Federal Energy Regulatory Commission initiatives. Recently the Energy Policy Act of 2005 and several regional initiatives have been pressing the integration of demand response as a resource for system operations. These policy and regulatory pressures are driving the exploration of new market designs at the wholesale and retail levels. The complex interplay among structural conditions, market protocols, and learning behaviors in relation to short-term and longer-term market performance demand a flexible computational environment where designs can be tested and sensitivities to power system and market rule changes can be explored. This paper presents the use of agent-based computational methods in the study of electricity markets at the wholesale and retail levels, and distinctions in problem formulation between these levels.

  5. Radioactivity in Food and the Environment, 2002

    E-Print Network [OSTI]

    Radioactivity in Food and the Environment, 2002 RIFE - 8 2003 #12;1 ENVIRONMENT AGENCY ENVIRONMENT AND HERITAGE SERVICE FOOD STANDARDS AGENCY SCOTTISH ENVIRONMENT PROTECTION AGENCY Radioactivity in Food and the Environment, 2002 RIFE - 8 October 2003 #12;2 This report was compiled by the Centre for Environment

  6. Terahertz vibration-rotation-tunneling spectroscopy of the water tetramer-d8: Combined analysis of vibrational bands at 4.1 and 2.0 THz

    E-Print Network [OSTI]

    Cohen, Ronald C.

    Terahertz vibration-rotation-tunneling spectroscopy of the water tetramer-d8: Combined analysis in the global fit of the water trimer. The detailed understanding of the water tetramer evolving from this work calculated concentrations of water trimers, tetramers, and pentamers of 1012 , 1011 , and 1010 cm-3

  7. MERCURY STABILITY IN THE ENVIRONMENT

    SciTech Connect (OSTI)

    John H. Pavlish

    1999-07-01T23:59:59.000Z

    The 1990 Clean Air Act Amendments (CAAAs) require the U.S. Environmental Protection Agency (EPA) to determine whether the presence of mercury and 188 other trace substances, referred to as air toxics or hazardous air pollutants (HAPs), in the stack emissions from fossil fuel-fired electric utility power plants poses an unacceptable public health risk (1). The EPA's conclusions and recommendations were presented in two reports: Mercury Study Report to Congress and Study of Hazardous Air Pollutant Emissions from Electric Utility Steam Generating Units-Final Report to Congress. The first congressional report addressed both human health and the environmental effects of anthropogenic mercury emissions, while the second report addressed the risk to public health posed by emissions of HAPs from steam electricity-generating units. The National Institute of Environmental Health Sciences is also required by the CAAAs to investigate mercury and determine a safe threshold level of exposure. Recently the National Academy of Sciences has also been commissioned by Congress to complete a report, based the available scientific evidence, regarding safe threshold levels of mercury exposure. Although the EPA reports did not state that mercury controls on coal-fired electric power stations should be required given the current state of the art, they did indicate that EPA views mercury as a potential threat to human health. It is likely that major sources of mercury emissions, including fossil-fired combustion systems, will be controlled at some point. In fact, municipal waste combustion units are already regulated. In anticipation of additional control measures, much research has been done (and continues) regarding the development of control technologies for mercury emitted from stationary sources to the atmosphere. Most approaches taken to date involve sorbent injection technologies or improve upon removal of mercury using existing technologies such as flue gas desulfurization scrubbers, fabric filters, and electrostatic precipitators. Depending on the fly ash chemistry and the form of mercury present in the flue gas, some of these existing technologies can be effective at capturing vapor-phase mercury from the flue gas stream. Although much research has been done on enhancing the removal of mercury from flue gas streams, little research has focused on what happens to the mercury when it is captured and converted and/or transferred to a solid or aqueous solution. The stability (or mobility) of mercury in this final process is critical and leads to the questions, What impact will the increased concentration of mercury have on utilization, disposal, and reuse? and Is the mercury removed from the flue gas really removed from the environment or rereleased at a later point? To help answer these questions, the Energy & Environmental Research Center (EERC) as part of the U.S. Department of Energy (DOE) Base Cooperative Agreement did a series of experiments using thermal desorption and leaching techniques. This report presents the results from these tests.

  8. REMOTE SENSING OF THE ENVIRONMENT

    E-Print Network [OSTI]

    Gilbes, Fernando

    1 CHAPTER 1: REMOTE SENSING OF THE ENVIRONMENT REFERENCE: Remote Sensing of the Environment John R. Jensen (2007) Second Edition Pearson Prentice Hall What is Remote Sensing? #12;2 Photogrammetry ­ the art of identifying objects and judging their significance (Colwell, 1966). Remote Sensing ­ the measurement

  9. Enhanced Oil Recovery with Downhole Vibration Stimulation in Osage County Oklahoma

    SciTech Connect (OSTI)

    J. Ford Brett; Robert V. Westermark

    2001-03-31T23:59:59.000Z

    The objective of this project is to demonstrate the impact of downhole vibration stimulation on oil production rates in a mature waterflood field. Oil & Gas Consultants International, Inc. (OGCI) will manage the project in close cooperation with the Osage Tribe as the tests will be conducted in Osage County, Oklahoma, the mineral estate of the Osage Tribe. The field is owned and operated by Calumet Oil Company. Phillips Petroleum Company will contribute their proprietary vibration core analysis of cores recovered from the pilot test area. To achieve the project objectives, the work has been divided into nine tasks, some are concurrent, while other tasks rely on completion of previous steps. The operator, Calumet Oil Company operates several field in Osage County Oklahoma. The North Burbank Unit will be the site of the test. The team will then determine where within the field to optimally locate the vibration test well. With the location determined, the test well will be drilled, cored, logged and 7-inch production casing run and cemented. In a parallel effort, OGCI will be designing, building, and testing a new version of the downhole vibration tool based on their patented and field proven whirling orbital vibrator. With the field test tool built to run in 7-inch casing. Reliability testing of the downhole tool and surface power source will be conducted in nearby field operated by Calumet Oil Company. After the core is recovered, Phillips Petroleum Company will be conducting laboratory tests utilizing their proprietary sonic core apparatus to determine fluid flow response to a range of vibration frequencies. These results, in turn, will allow final adjustments to the frequency generation mechanisms of the downhole vibration tool. One or more offset wells, near to the vibration test well, will be equipped with downhole geophones and or hydro-phones to determine the strength of signal and if the producing formation has a characteristic resonant frequency response. Surface geophones will also be set out and arranged to pick up the signal generated by the downhole vibration tool. The downhole vibrator will be installed in the test well. Monitoring the production and injection for the pilot test area will continue. As the frequency of the downhole tool is changed, the recording of seismic signals, both on the surface and downhole, will also be conducted. The results of the data collection will be a matrix of varying vibration stimulation conditions corresponding to changes in production fluid rates and seismic responses. The report on the results of the downhole vibration stimulation will be prepared and delivered using several venues. Technical papers will be submitted to the Society of Petroleum Engineers. Workshops are planned to be held for operators in Osage County and surrounding areas. A dedicated technical session on vibration stimulation may be offered at the 2002 SPE/DOE/IOR Conference, bringing together the world's experts in this emerging technology. The final task will be to close out the project.

  10. The fundamental role of quantized vibrations in coherent light harvesting by cryptophyte algae

    E-Print Network [OSTI]

    Avinash Kolli; Edward J. O'Reilly; Gregory D. Scholes; Alexandra Olaya-Castro

    2012-10-10T23:59:59.000Z

    The influence of fast vibrations on energy transfer and conversion in natural molecular aggregates is an issue of central interest. This article shows the important role of high-energy quantized vibrations and their non-equilibrium dynamics for energy transfer in photosynthetic systems with highly localized excitonic states. We consider the cryptophyte antennae protein phycoerythrin 545 and show that coupling to quantized vibrations which are quasi-resonant with excitonic transitions is fundamental for biological function as it generates non-cascaded transport with rapid and wider spatial distribution of excitation energy. Our work also indicates that the non-equilibrium dynamics of such vibrations can manifest itself in ultrafast beating of both excitonic populations and coherences at room temperature, with time scales in agreement with those reported in experiments. Moreover, we show that mechanisms supporting coherent excitonic dynamics assist coupling to selected modes that channel energy to preferential sites in the complex. We therefore argue that, in the presence of strong coupling between electronic excitations and quantized vibrations, a concrete and important advantage of quantum coherent dynamics is precisely to tune resonances that promote fast and effective energy distribution.

  11. Design and optimization of a bi-axial vibration-driven electromagnetic generator

    SciTech Connect (OSTI)

    Yang, Jin, E-mail: yangjin@cqu.edu.cn; Yu, Qiangmo; Zhao, Jiangxin; Zhao, Nian; Wen, Yumei; Li, Ping; Qiu, Jing [Department of Optoelectronic Engineering, Research Center of Sensors and Instruments, Chongqing University, Chongqing 400044 (China)

    2014-09-21T23:59:59.000Z

    To scavenge energy from ambient vibrations with arbitrary in-plane motion directions and over a wide frequency range, a novel electromagnetic vibration energy harvester is designed and optimized. In the harvester, a circular cross-section elastic rod, not a traditional thin cantilever beam, is used to extract ambient vibration energy because of its capability to collect vibration from arbitrary in-plane motion directions. The magnetic interaction between magnets and the iron core contributes to a nonlinear oscillation of the rod with increased frequency bandwidth. The influences of the structure configurations on the electrical output and the working bandwidth of the harvester are investigated using Ansoft's Maxwell 3D to achieve optimal performance. The experimental results show that the harvester is sensitive to vibrations from arbitrary in-plane directions and it exhibits a bandwidth of 5.7 Hz and a maximum power of 13.4 mW at an acceleration of 0.6 g (with g=9.8 ms?²).

  12. September 2013 Most Viewed Documents for Biology And Medicine...

    Office of Scientific and Technical Information (OSTI)

    September 2013 Most Viewed Documents for Biology And Medicine Science Subject Feed Drug Retention Times Center for Human Reliability Studies (2007) 29 > Oleoresin Capsicum...

  13. ALS Technique Gives Novel View of Lithium Battery Dendrite Growth

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ALS Technique Gives Novel View of Lithium Battery Dendrite Growth Print Lithium-ion batteries, popular in today's electronic devices and electric vehicles, could gain significant...

  14. March 2014 Most Viewed Documents for Biology And Medicine | OSTI...

    Office of Scientific and Technical Information (OSTI)

    March 2014 Most Viewed Documents for Biology And Medicine Science Subject Feed Carbon Dioxide Sequestering Using Microalgal Systems Daniel J. Stepan; Richard E. Shockey; Thomas A....

  15. January 2013 Most Viewed Documents for Power Generation And Distributi...

    Office of Scientific and Technical Information (OSTI)

    January 2013 Most Viewed Documents for Power Generation And Distribution Lessons from Large-Scale Renewable Energy Integration Studies: Preprint Bird, L.; Milligan, M. Small punch...

  16. Newbie question: How to view commercial/residential load profile...

    Open Energy Info (EERE)

    Newbie question: How to view commercialresidential load profile datasets? Home > Groups > Buildings I have downloaded SAM (20112414) and cannot access open the .tar files. Help...

  17. New ALS Technique Gives Nanoscale Views of Complex Systems

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nanoscale Views of Complex Systems Print Studying and identifying molecules at the mesoscale has always been challenging-even the best microscopes and spectrometers have...

  18. Better Buildings Network View | September 2014 | Department of...

    Broader source: Energy.gov (indexed) [DOE]

    Financing Program: On-Bill Financing Brings Lenders and Homeowners On Board Better Buildings Network View | December 2014 On-Bill Financing for Energy Efficiency Improvements...

  19. March 2015 Most Viewed Documents for Biology And Medicine | OSTI...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    March 2015 Most Viewed Documents for Biology And Medicine Measuring dopamine release in the human brain with PET Volkow, N.D. Brookhaven National Lab., Upton, NY (United...

  20. The Better Buildings Neighborhood View - July 2013 | Department...

    Energy Savers [EERE]

    Better Buildings Neighborhood View - October 2012 Better Buildings Neighborhood Program Home Accomplishments History Better Buildings Partners Stories Interviews Videos Contact Us...

  1. Spiral Structure and Galaxy Environment

    E-Print Network [OSTI]

    Sidney van den Bergh

    2002-04-30T23:59:59.000Z

    Among 330 normal spirals of types Sa-Sc the fraction of objects exhibiting ``ring'', ``intermediate'' and ``spiral'' arm varieties does not correlated with environment. A similar conclusion appears to apply to the arm varieties of 123 barred spirals of types SBa-SBc. It is concluded that, among the northern Shapley-Ames galaxies, the distinction between the spiral and ring varieties of spiral arms is, within the accuracy of presently available data, independent of galaxy environment. This result suggests that the detailed morphology of spiral arms depends primarily on parent galaxy characteristics, rather than on the galactic environment.

  2. 3-dimensional telepresence system for a robotic environment

    DOE Patents [OSTI]

    Anderson, Matthew O. (Idaho Falls, ID); McKay, Mark D. (Idaho Falls, ID)

    2000-01-01T23:59:59.000Z

    A telepresence system includes a camera pair remotely controlled by a control module affixed to an operator. The camera pair provides for three dimensional viewing and the control module, affixed to the operator, affords hands-free operation of the camera pair. In one embodiment, the control module is affixed to the head of the operator and an initial position is established. A triangulating device is provided to track the head movement of the operator relative to the initial position. A processor module receives input from the triangulating device to determine where the operator has moved relative to the initial position and moves the camera pair in response thereto. The movement of the camera pair is predetermined by a software map having a plurality of operation zones. Each zone therein corresponds to unique camera movement parameters such as speed of movement. Speed parameters include constant speed, or increasing or decreasing. Other parameters include pan, tilt, slide, raise or lowering of the cameras. Other user interface devices are provided to improve the three dimensional control capabilities of an operator in a local operating environment. Such other devices include a pair of visual display glasses, a microphone and a remote actuator. The pair of visual display glasses are provided to facilitate three dimensional viewing, hence depth perception. The microphone affords hands-free camera movement by utilizing voice commands. The actuator allows the operator to remotely control various robotic mechanisms in the remote operating environment.

  3. Performance viewing and editing in ASSESS Outsider

    SciTech Connect (OSTI)

    Snell, M.K. [Sandia National Labs., Albuquerque, NM (US); Key, B.; Bingham, B. [Science and Engineering Associates, Inc., Albuquerque, NM (US)

    1993-07-01T23:59:59.000Z

    The Analytic System and Software for Evaluation of Safeguards and Security (ASSESS) Facility module records site information in the path elements and areas of an Adversary Sequence Diagram. The ASSESS Outsider evaluation module takes this information and first calculates performance values describing how much detection and delay is assigned at each path element and then uses the performance values to determine most-vulnerable paths. This paper discusses new Outsider capabilities that allow the user to view how elements are being defeated and to modify some of these values in Outsider. Outsider now displays how different path element segments are defeated and contrasts the probability of detection for alternate methods of defeating a door (e.g., the lock or the door face itself). The user can also override element segment delays and detection probabilities directly during analysis in Outsider. These capabilities allow users to compare element performance and to verify correct path element performance for all elements, not just those on the most-vulnerable path as is the case currently. Improvements or reductions in protection can be easily checked without creating a set of new facility files to accomplish it.

  4. A HYPERSPECTRAL VIEW OF THE CRAB NEBULA

    SciTech Connect (OSTI)

    Charlebois, M.; Drissen, L.; Bernier, A.-P. [Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, Quebec G1V 0A6 (Canada); Grandmont, F. [ABB Bomem Inc., 585 boulevard Charest est, Suite 300, Quebec, Quebec G1K 9H4 (Canada); Binette, L., E-mail: maxime.charlebois.1@ulaval.c, E-mail: ldrissen@phy.ulaval.c, E-mail: anne-pier.bernier.1@ulaval.c [Instituto de AstronomIa, UNAM, Ap.70-264, 04510 Mexico, DF (Mexico)

    2010-05-15T23:59:59.000Z

    We have obtained spatially resolved spectra of the Crab nebula in the spectral ranges 450-520 nm and 650-680 nm, encompassing the H{beta}, [O III] {lambda}4959, {lambda}5007, H{alpha}, [N II] {lambda}6548, {lambda}6584, and [S II] {lambda}6717, {lambda}6731 emission lines, with the imaging Fourier transform spectrometer SpIOMM at the Observatoire du Mont-Megantic's 1.6 m telescope. We first compare our data with published observations obtained either from a Fabry-Perot interferometer or from a long-slit spectrograph. Using a spectral deconvolution technique similar to the one developed by Cadez et al., we identify and resolve multiple emission lines separated by large Doppler shifts and contained within the rapidly expanding filamentary structure of the Crab. This allows us to measure important line ratios, such as [N II]/H{alpha}, [S II]/H{alpha}, and [S II] {lambda}6717 /[S II] {lambda}6731 of individual filaments, providing a new insight on the SE-NW asymmetry in the Crab. From our analysis of the spatial distribution of the electronic density and of the respective shocked versus photoionized gas components, we deduce that the skin-less NW region must have evolved faster than the rest of the nebula. Assuming a very simple expansion model for the ejecta material, our data provide us with a complete tridimensional view of the Crab.

  5. Energy-dependent characteristics of collisinal vibration-energy exchange in vapors of polyatomic molcules

    SciTech Connect (OSTI)

    Zalesskaya, G.A.; Yakovlev, D.L. [Institute of Molecular and Atomic Physics, Minsk (Belarus)

    1995-02-01T23:59:59.000Z

    CO{sub 2} laser-induced delayed fluorescence was used to study the collisional vibration-energy exchange between the polyatomic molecules in gases. The efficiency of collisional exchange, the mean amount of energy transfer in one collision, as well as their correlation with the vibration energy and with the size of excited molecule were determined for diacetyl, acetophenone, benzophenone, and anthraquinone molecules form the experimentally observed pressure dependences of the decay rates and fluorescence intensities. It was shown that the mean amount of energy transfer per collision decreases with the molecular size and increases as E{sup m}, with m>2, with increasing the vibration energy. 25 refs., 4 figs., 1 tab.

  6. Enhancing light-harvesting power with coherent vibrational interactions: a quantum heat engine picture

    E-Print Network [OSTI]

    Nathan Killoran; Susana F. Huelga; Martin B. Plenio

    2014-12-12T23:59:59.000Z

    Recent evidence suggests that quantum effects may have functional importance in biological light-harvesting systems. Along with delocalized electronic excitations, it is now suspected that quantum coherent interactions with certain near-resonant vibrations contribute to light-harvesting performance. However, the actual quantum advantage offered by such coherent vibrational interactions has not yet been established. We investigate a quantum design principle, whereby coherent exchange of single energy quanta between electronic and vibrational degrees of freedom can enhance a light-harvesting system's power above what is possible by thermal mechanisms alone. We present a prototype quantum heat engine which cleanly illustrates this quantum design principle, and quantify its quantum advantage using thermodynamic measures of performance. We also demonstrate the principle's applicability for realistic biological structures.

  7. Experimental flight test vibration measurements and nondestructive inspection on a USCG HC-130H aircraft

    SciTech Connect (OSTI)

    Moore, D.G.; Jones, C.R. [Sandia National Labs., Albuquerque, NM (United States). FAA Airworthiness Assurance NDI Validation Center; Mihelic, J.E.; Barnes, J.D. [Coast Guard Aircraft Repair and Supply Center, Elizabeth City, NC (United States)

    1998-08-01T23:59:59.000Z

    This paper presents results of experimental flight test vibration measurements and structural inspections performed by the Federal Aviation Administration`s Airworthiness Assurance NDI Validation Center (AANC) at Sandia National Laboratories and the US Coast Guard Aircraft Repair and Supply Center (ARSC). Structural and aerodynamic changes induced by mounting a Forward Looking Infrared (FLIR) system on a USCG HC-130H aircraft are described. The FLIR adversely affected the air flow characteristics and structural vibration on the external skin of the aircraft`s right main wheel well fairing. Upon initial discovery of skin cracking and visual observation of skin vibration in flight by the FLIR, a baseline flight without the FLIR was conducted and compared to other measurements with the FLIR installed. Nondestructive inspection procedures were developed to detect cracks in the skin and supporting structural elements and document the initial structural condition of the aircraft. Inspection results and flight test vibration data revealed that the FLIR created higher than expected flight loading and was the possible source of the skin cracking. The Coast Guard performed significant structural repair and enhancement on this aircraft, and additional in-flight vibration measurements were collected on the strengthened area both with and without the FLIR installed. After three months of further operational FLIR usage, the new aircraft skin with the enhanced structural modification was reinspected and found to be free of flaws. Additional US Coast Guard HC-130H aircraft are now being similarly modified to accommodate this FLIR system. Measurements of in-flight vibration levels with and without the FLIR installed, and both before and after the structural enhancement and repair were conducted on the skin and supporting structure in the aircraft`s right main wheel fairing. Inspection results and techniques developed to verify the aircraft`s structural integrity are discussed.

  8. Undergraduate Degrees 2014 School of Earth & Environment

    E-Print Network [OSTI]

    Undergraduate Degrees 2014 School of Earth & Environment FACULTY OF ENVIRONMENT #12;UNIVERSITYOFLEEDS 03 Contents Welcome to the School of Earth & Environment 4 Choosing the right degree 6 Three, MGeol, MGeophys) The MSc Track Fieldwork 8 Why study the environment? 10 Environment and Business 12

  9. Robot manipulation in human environments

    E-Print Network [OSTI]

    Edsinger, Aaron Ladd, 1972-

    2007-01-01T23:59:59.000Z

    Human environments present special challenges for robot manipulation. They are often dynamic, difficult to predict, and beyond the control of a robot engineer. Fortunately, many characteristics of these settings can be ...

  10. Robot Manipulation in Human Environments

    E-Print Network [OSTI]

    Edsinger, Aaron

    2007-01-16T23:59:59.000Z

    Human environments present special challenges for robot manipulation. They are often dynamic, difficult to predict, and beyond the control of a robot engineer. Fortunately, many characteristics of these settings can be ...

  11. DPC materials and corrosion environments

    SciTech Connect (OSTI)

    Ilgen, Anastasia G.; Bryan, Charles R.; Teich-McGoldrick, Stephanie; Hardin, Ernest

    2014-10-01T23:59:59.000Z

    This review focuses on the performance of basket materials that could be exposed to ground water over thousands of years, and prospective disposal overpack materials that could possibly be used to protect dual-purpose canisters (DPCs) in disposal environments.

  12. Musicpainter : a collaborative composing environment

    E-Print Network [OSTI]

    Li, Wu-Hsi

    2008-01-01T23:59:59.000Z

    This thesis presents the design and implementation of Musicpainter, a networked graphical composing environment that encourages sharing and collaboration within the composing process. Instead of building a computer-assisted ...

  13. Global Environment Facility Evaluation Office

    E-Print Network [OSTI]

    Pfaff, Alex

    Global Environment Facility Evaluation Office PROTECTED AREAS AND AVOIDED DEFORESTATION #12;Protected Areas and Avoided Deforestation: An Econometric Evaluation - i - TABLE OF CONTENTS 1................................................................................4 3.3 ESTIMATED EFFECTS OF PROTECTED AREAS ON DEFORESTATION

  14. Systematic studies of molecular vibrational anharmonicity and vibration-rotation interaction by self-consistent-field higher derivative methods: Applications to asymmetric and symmetric top and linear polyatomic molecules

    SciTech Connect (OSTI)

    Clabo, D.A. Jr.

    1987-04-01T23:59:59.000Z

    Inclusion of the anharmonicity normal mode vibrations (i.e., the third and fourth (and higher) derivatives of a molecular Born-Oppenheimer potential energy surface) is necessary in order to theoretically reproduce experimental fundamental vibrational frequencies of a molecule. Although ab initio determinations of harmonic vibrational frequencies may give errors of only a few percent by the inclusion of electron correlation within a large basis set for small molecules, in general, molecular fundamental vibrational frequencies are more often available from high resolution vibration-rotation spectra. Recently developed analytic third derivatives methods for self-consistent-field (SCF) wavefunctions have made it possible to examine with previously unavailable accuracy and computational efficiency the anharmonic force fields of small molecules.

  15. Impact of quantized vibrations on the efficiency of interfacial charge separation in photovoltaic devices

    E-Print Network [OSTI]

    Soumya Bera; Nicolas Gheeraert; Simone Fratini; Sergio Ciuchi; Serge Florens

    2014-10-02T23:59:59.000Z

    We demonstrate that charge separation at donor-acceptor interfaces is a complex process that is controlled by the combined action of Coulomb binding for electron-hole pairs and partial relaxation due to quantized phonons. A joint electron-vibration quantum dynamical study reveals that high energy vibrations sensitively tune the charge transfer probability as a function of time and injection energy, due to polaron formation. These results have bearings for the optimization of energy transfer both in organic and quantum dot photovoltaics, as well as in biological light harvesting complexes.

  16. Adaptive Model-Based Mine Detection/Localization using Noisy Laser Doppler Vibration Measurements

    SciTech Connect (OSTI)

    Sullivan, E J; Xiang, N; Candy, J V

    2009-04-06T23:59:59.000Z

    The acoustic detection of buried mines is hampered by the fact that at the frequencies required for obtaining useful penetration, the energy is quickly absorbed by the ground. A recent approach which avoids this problem, is to excite the ground with a high-level low frequency sound, which excites low frequency resonances in the mine. These resonances cause a low-level vibration on the surface which can be detected by a Laser Doppler Vibrometer. This paper presents a method of quickly and efficiently detecting these vibrations by sensing a change in the statistics of the signal when the mine is present. Results based on real data are shown.

  17. A vibrational analysis of the 2900 A system of sulphur dioxide

    E-Print Network [OSTI]

    Bates, Charles Leslie

    1962-01-01T23:59:59.000Z

    A VIBRATIONAL A%LLTSIS OF THE 29OO A SISTER OF SULPHUR DIOIIDE A Thesis Submitted to the Oraduate Sohool of the Agrionltural and Meohsnioal College of Texas in partial fulfilment of the requiresents for the degree of HASTEN OF SCllWCE Aweary..., Absorption spectrea of 802 between 3250 Absorption speotroa of 80 between 3D5 6g Absorption speotroa of 802 between 2965 and 3530 A ~ 11 and 3400 A ~ 12 and 3290 A ~ 13 snd 3160 A ~ 14 Vo Modes of vibration of the SO nolecnle ~ ~ ~ ~ 15 So Energ level...

  18. Surface Modes of Vibration in Rigid-Ion Model of Nacl

    E-Print Network [OSTI]

    CHEN, TS; Allen, Roland E.; Alldredg, GP; WETTE, FWD.

    1972-01-01T23:59:59.000Z

    SURFACE MEAN-SQUARE AMPLITUDES OF VIBRATION FOR NaC1 627 A78 (1965). A. A. Lucas, J. Chem. Phys. 48, 3156 (1968). Benson and co-workers have found that oversimplified models which allow different displacements for different ions tend... and T. Paakkari, Acta Cryst. ~23 1107 (1967). PHYSICAL REVIEW B VOLUME 6, NUMBER 2 15 JULY 1972 Surface Modes of Vibration in the Rigid-Ion Model of NaC1~ T. S. Chen, G. P. Alldredge, and F. W. de Wette Department of Physics, University of Texas...

  19. ENHANCED OIL RECOVERY WITH DOWNHOLE VIBRATION STIMULATION IN OSAGE COUNTY OKLAHOMA

    SciTech Connect (OSTI)

    Robert Westermark; J. Ford Brett

    2003-11-01T23:59:59.000Z

    This Final Report covers the entire project from July 13, 2000 to June 30, 2003. The report summarizes the details of the work done on the project entitled ''Enhanced Oil Recovery with Downhole Vibration Stimulation in Osage County Oklahoma'' under DOE Contract Number DE-FG26-00BC15191. The project was divided into nine separate tasks. This report is written in an effort to document the lessons learned during the completion of each task. Therefore each task will be discussed as the work evolved for that task throughout the duration of the project. Most of the tasks are being worked on simultaneously, but certain tasks were dependent on earlier tasks being completed. During the three years of project activities, twelve quarterly technical reports were submitted for the project. Many individual topic and task specific reports were included as appendices in the quarterly reports. Ten of these reports have been included as appendices to this final report. Two technical papers, which were written and accepted by the Society of Petroleum Engineers, have also been included as appendices. The three primary goals of the project were to build a downhole vibration tool (DHVT) to be installed in seven inch casing, conduct a field test of vibration stimulation in a mature waterflooded field and evaluate the effects of the vibration on both the produced fluid characteristics and injection well performance. The field test results are as follows: In Phase I of the field test the DHVT performed exceeding well, generating strong clean signals on command and as designed. During this phase Lawrence Berkeley National Laboratory had installed downhole geophones and hydrophones to monitor the signal generated by the downhole vibrator. The signals recorded were strong and clear. Phase II was planned to be ninety-day reservoir stimulation field test. This portion of the field tests was abruptly ended after one week of operations, when the DHVT became stuck in the well during a routine removal activity. The tool cannot operate in this condition and remains in the well. There was no response measured during or afterwards to either the produced fluids from the five production wells or in the injection characteristics of the two injection wells in the pilot test area. Monitoring the pilot area injection and production wells ceased when the field test was terminated March 14, 2003. Thus, a key goal of this project, which was to determine the effects of vibration stimulation on improving oil recovery from a mature waterflood, was not obtained. While there was no improved oil recovery effect measured, there was insufficient vibration stimulation time to expect a change to occur. No conclusion can be drawn about the effectiveness of vibration stimulation in this test.

  20. VIBRATIONAL MEASUREMENTS IN 3-ID-B J. Sutter1, E. Alp1, J. Barraza2, D. Shu2

    E-Print Network [OSTI]

    Kemner, Ken

    noise that could have a ected our measurements. However, the table itself was equipped with six motors table's position and angle. Because these motors could also have produced vibrations on the table top1 VIBRATIONAL MEASUREMENTS IN 3-ID-B J. Sutter1, E. Alp1, J. Barraza2, D. Shu2 1 INTRODUCTION We