National Library of Energy BETA

Sample records for vibration environment view

  1. Active vibration control in a microgravity environment 

    E-Print Network [OSTI]

    Park, Myoung Soo

    1987-01-01

    Subject: Mechanical Engineering ACTIVE VIBRATION CONTROL IN A MICROGRAVITY ENVIRONMENT A Thesis by MYOUNG SOO PARK Approved as to style and content by: Dr. C. H. Gerhold (Chairman of Coxnmit tee) Dr. T ozi (Member) Dr. Y. XVe sman (Member) Dr...: Dr. Carl H. Gerhold An analytical model has been developed for active vibration isolation technique in a microgravity environment. The near weightless environment of space permits the vibration sensitive payload to be floated within an enclosure...

  2. Testing a combined vibration and acceleration environment.

    SciTech Connect (OSTI)

    Jepsen, Richard Alan; Romero, Edward F.

    2005-01-01

    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.

  3. 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_teterukov@ipc.i.u-tokyo.ac.jp, {kawakami, tachi}@star.t.u-tokyo.ac.jp Abstract-- The paper focuses on vibration damping control of a new safety while performing tasks of physical interaction with environment or human beings. The vibrations

  4. 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)

    2010-12-14

    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.

  5. Testing in a combined vibration and acceleration environment.

    SciTech Connect (OSTI)

    Jepsen, Richard Alan; Romero, Edward F.

    2004-10-01

    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. 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.

    2015-01-02

    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. As a result, this new method has the potential to probe the geometry of ion-pairing and allows the reduction potentials of moleculesmore »to be determined in the absence of electrolyte in an environment of low dielectric constant.« less

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

    E-Print Network [OSTI]

    Bayeh, Alexander C.

    2010-01-14

    upon Q-switch and flash lamps of the laser, respectively. Preliminary experiments con- ducted with the spectroscopy system were conducted in the non-isobaric flow field in the wake of an underexpanded jet nozzle with an approximate exit Mach number of 2...-VIBRATIONAL RAMAN SPECTROSCOPY FOR MEASUREMENTS OF THERMOCHEMISTRY IN NON-ISOBARIC ENVIRONMENTS A Thesis by ALEXANDER CHRISTIAN BAYEH Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree...

  8. vibration environment Segalman, D.J.; Fulcher, C.W.G.; Reese...

    Office of Scientific and Technical Information (OSTI)

    MECHANICAL VIBRATIONS; TRANSFER FUNCTIONS; CALCULATION METHODS; FINITE ELEMENT METHOD; FOURIER ANALYSIS An efficient method is presented for calculation of RMS von Mises stresses...

  9. Downhole vibration sensing by vibration energy harvesting

    E-Print Network [OSTI]

    Trimble, A. Zachary

    2007-01-01

    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 ...

  10. 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)

    2015-01-28

    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.

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

    E-Print Network [OSTI]

    Zhang, Zhedong

    2015-01-01

    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...

  12. Design and Selection of Materialized Views in a Data Warehousing Environment: A Case Study

    E-Print Network [OSTI]

    Song, Il-Yeol

    , including query access frequencies, base-data update frequencies, query access costs, view maintenance costs views, the total cost of the maintenance, storage and query processing of the system is optimized incur a high maintenance cost. Furthermore, for a system with limited storage space and

  13. Vibration Background

    E-Print Network [OSTI]

    Dickinson, Kristin

    2012-01-01

    Vibration Background By Selim Özdo?an Translated by Kristinteacher says we have a vibration background, what is that? Igave some thought to our vibration background. It’s a good

  14. 7 July 2011 The contents and views included in Science for Environment Policy are based on independent, peer-reviewed research and do not necessarily reflect

    E-Print Network [OSTI]

    7 July 2011 The contents and views included in Science for Environment Policy are based. To cite this article/service: "Science for Environment Policy": European Commission DG Environment News to each of the ethical principles. For example, the European Commission is urged to establish monitoring

  15. 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)

    1991-01-01

    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.

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

    SciTech Connect (OSTI)

    Herron, Kerry Gale; Jenkins-Smith, Hank C.

    2008-01-01

    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. Vibrational Coupling

    SciTech Connect (OSTI)

    2011-01-01

    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.

  18. This report has undergone limited technical review and the content does not necessarily reflect the views and policies of Environment Canada. Mention of trade names or commercial products

    E-Print Network [OSTI]

    #12;NOTICE This report has undergone limited technical review and the content does not necessarily reflect the views and policies of Environment Canada. Mention of trade names or commercial products does Abstract The impact of emissions from urban sources to ambient air pollution is not considered to be large

  19. Bumblebee vibration activated foraging

    E-Print Network [OSTI]

    Su, Dan Kuan-Nien

    2009-01-01

    SAN DIEGO Bumblebee vibration activated foraging: A ThesisOF THE THESIS Bumblebee vibration activated foraging by Danproduce brief bursts of vibration (foraging activation

  20. Tripod vibration anesthesia

    E-Print Network [OSTI]

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

    2008-01-01

    S, Carver A, Liu JF. Vibration anesthesia: a noninvasiveTripod vibration anesthesia William V Stoecker MD 1 , Josephet al. have described vibration anesthesia in this journal

  1. 2011 Vibrations -1 VIBRATION OF PLATES & BARS

    E-Print Network [OSTI]

    Gustafsson, Torgny

    is connected to a mechanical vibrator. The vibration is induced by the Lorenz force between the current2011 Vibrations - 1 VIBRATION OF PLATES & BARS The objectives of this experiment are: To observe and short flat bars, Chladni plates, salt, salt trays INTRODUCTION he equations of vibrational motion

  2. The Linked ArcView 2.1TM and XGobi Environment --GIS, Dynamic Statistical Graphics, and Spatial Data

    E-Print Network [OSTI]

    Symanzik, Jürgen

    and geographic information systems. maintained within a geo- graphic information system (GIS). We developed a bidirectional link between Arc information system (GIS), ArcView 2.1TM, and an interactive dynamic graphics program in the X Window System

  3. Solving Vibrational Problems... So easy!! Solving Vibrational Problems... So easy!!

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    #12;Solving Vibrational Problems... So easy!! #12;Solving Vibrational Problems... So easy!! #12;Solving Vibrational Problems... So easy!! #12;Solving Vibrational Problems... So easy!! ...right? · How

  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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFES October 27th, 2010 ThanksProgramEnricoEnvironment Environment

  5. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFES October 27th, 2010 ThanksProgramEnricoEnvironment

  6. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFES October 27th, 2010 ThanksProgramEnricoEnvironmentVideo News Room

  7. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFES October 27th, 2010 ThanksProgramEnricoEnvironmentVideo News

  8. Sequential vibrational resonance in multistable systems

    E-Print Network [OSTI]

    J. H. Yang; X. B. Liu

    2011-06-17

    The phenomenon of sequential vibrational resonance existed in a multistable system that is excited by both high- and low-frequency signals is reported. By the method of direct separation of motions, the theoretical investigation on vibrational resonance is conducted in both cases of underdamped and overdamped, and the analytical predictions are in good agreement with the numerical simulations. In view of the theoretical results, the zero-order Bessel function related to the high-frequency signal is included in the renormalized resonant frequency, and which leads to the appearance of the sequential vibrational resonance. In the case of underdamped system with small damping coefficient, the resonance occurs in a series of discrete parameter regions. The sequential vibrational resonance is different from the traditional multiple vibrational resonance, because its appearance is much more regular. The results in this work may be helpful in the field of signal processing electronics, especially for dealing with the very-low-frequency signal.

  9. 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)

    2000-01-01

    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.

  10. Quantum optimal environment engineering for efficient photoinduced charge separation

    E-Print Network [OSTI]

    Dmitry V. Zhdanov; Tamar Seideman

    2015-08-18

    The possibility to induce predetermined coherent quantum dynamics by controlling only the dissipative environmental parameters (such as temperature and pressure) is studied using the combined optimal control and environment engineering frameworks. As an example, we consider the problem of transforming an optically excited donor state into free charge carriers via intermediate higher-lying bridge state(s), with a view to solar energy conversion. In this context, vibrational bath engineering allows to promote fast, directional charge transfer and to suppress recombinative losses.

  11. Vibration Harvesting using Electromagnetic Transduction

    E-Print Network [OSTI]

    Waterbury, Andrew

    2011-01-01

    Puers, “Harvesting Energy from Vibrations by a Micromachinedsignal processing using vibration-based power generation,”electromagnetic generator for vibration energy harvesting,”

  12. Vibration Harvesting using Electromagnetic Transduction

    E-Print Network [OSTI]

    Waterbury, Andrew

    2011-01-01

    radio waves, and mechanical vibrations can also beintended to harvest mechanical vibrations by converting thethe harvesting of mechanical vibrations as addressed by this

  13. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM

    SciTech Connect (OSTI)

    Martin E. Cobern

    2004-08-31

    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.

  14. Vibrational Damping of Composite Materials

    E-Print Network [OSTI]

    Biggerstaff, Janet M.

    2006-01-01

    Conference on Mechanical Vibration and Noise, 5:125-34. 5868 Rao, Singiresu S. Mechanical Vibrations. Addison-Wesley

  15. ROTATION-VIBRATION TETRAHEDRAL

    E-Print Network [OSTI]

    Sadovskií, Dmitrií

    ANALYSIS OF ROTATION-VIBRATION RELATIVE EQUILIBRIA ON THE EXAMPLE OF A TETRAHEDRAL FOUR ATOM (RE) of a nonrigid molecule which vibrates about a well de#12;ned equilibrium con#12;guration and rotates as a whole. Our analysis uni#12;es the theory of rotational and vibrational RE. We rely

  16. VIBRATION->VIBRATION ENERGY TRANSFER IN METHANE

    E-Print Network [OSTI]

    Hess, Peter

    2012-01-01

    Submitted to the Journal of Chemical Physics VIBRATIONVIBRATION ENERGY TRANSFER IN METHANE Peter Hess, A. H. Kung,L K. Fox, Analysis of Vibration-Rotation Spectra of Methane,

  17. VIBRATION->VIBRATION ENERGY TRANSFER IN METHANE

    E-Print Network [OSTI]

    Hess, Peter

    2012-01-01

    VIBRATION ENERGY TRANSFER IN METHANE Peter Hess, A. H. Kung,Rotation Spectra of Methane, U.S. Nat'L· Tech. Inform.tret t tllll. I. INTRODUCTION Methane is a relatively simple

  18. Modelling of Haptic Vibration Textures with Infinite-Impulse-Response Filters

    E-Print Network [OSTI]

    Lee, WonSook

    Modelling of Haptic Vibration Textures with Infinite-Impulse-Response Filters Vijaya L. Guruswamy, Canada ON K1N 6N5 Email: vguru054,jlang,wslee@site.uottwa.ca Abstract--Vibration feedback models--Haptic, Vibrotactile, Texture. I. INTRODUCTION We experience vibrations during contact with our physical environment

  19. Vibrating fuel grapple

    DOE Patents [OSTI]

    Chertock, deceased, Alan J. (late of San Francisco, CA); Fox, Jack N. (San Jose, CA); Weissinger, Robert B. (Santa Clara, CA)

    1982-01-01

    A reactor refueling method utilizing a vibrating fuel grapple for removing spent fuel assemblies from a reactor core which incorporates a pneumatic vibrator in the grapple head, enabling additional withdrawal capability without exceeding the allowable axial force limit. The only moving part in the vibrator is a steel ball, pneumatically driven by a gas, such as argon, around a track, with centrifugal force created by the ball being transmitted through the grapple to the assembly handling socket.

  20. Vibration from underground railways: considering piled foundations and twin tunnels

    E-Print Network [OSTI]

    Kuo, Kirsty Alison

    2011-02-08

    Accurate predictions of ground-borne vibration levels in the vicinity of an underground railway are greatly sought after in modern urban centers. Yet the complexity involved in simulating the underground environment means that it is necessary...

  1. Vibrational Spectroscopy of Chromatographic Interfaces

    SciTech Connect (OSTI)

    Jeanne E. Pemberton

    2011-03-10

    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.

  2. 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

  3. Environment Environment

    E-Print Network [OSTI]

    the sustainable management of forests and woodlands #12;Applicant's Guidance Strategic Forest Plans - applicant EnvironmentEconomy Strategic Forest Plans applicant's guidance #12;Strategic Forest Plans 2 | Strategic Forest Plans - applicant's guidance A Forest Plan is a strategic long term plan that aims to encourage

  4. Electron Trapping by Molecular Vibration

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

    Electron Trapping by Molecular Vibration Electron Trapping by Molecular Vibration Print Wednesday, 27 April 2005 00:00 In photoelectron spectroscopy experiments performed at the...

  5. Electron Trapping by Molecular Vibration

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

    types of molecular vibrations. Specifically, they found that when the symmetry of a linear triatomic molecule is broken by asymmetric vibrational modes, photoelectrons can...

  6. The Oblique Basis Method from an Engineering Point of View

    E-Print Network [OSTI]

    V. G. Gueorguiev

    2012-10-16

    The oblique basis method is reviewed from engineering point of view related to vibration and control theory. Examples are used to demonstrate and relate the oblique basis in nuclear physics to the equivalent mathematical problems in vibration theory. The mathematical techniques, such as principal coordinates and root locus, used by vibration and control theory engineers are shown to be relevant to the Richardson - Gaudin pairing-like problems in nuclear physics.

  7. Vibrational dephasing mechanisms in liquids and glasses: Vibrational echo experiments

    E-Print Network [OSTI]

    Fayer, Michael D.

    Vibrational dephasing mechanisms in liquids and glasses: Vibrational echo experiments K. D. Rector September 1997; accepted 27 October 1997 Picosecond vibrational echo studies of the asymmetric stretching. It is proposed that the T1 dependence arises from coupling of the vibration to the glass's tunneling two level

  8. NIF Ambient Vibration Measurements

    SciTech Connect (OSTI)

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

    1999-11-29

    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.

  9. Fiber optic vibration sensor

    DOE Patents [OSTI]

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

    1995-01-01

    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.

  10. Fiber optic vibration sensor

    DOE Patents [OSTI]

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

    1995-01-10

    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.

  11. Externally tuned vibration absorber

    DOE Patents [OSTI]

    Vincent, Ronald J. (Latham, NY)

    1987-09-22

    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.

  12. PIEZOELECTRIC POWER SCAVENGING OF MECHANICAL VIBRATION ENERGY

    E-Print Network [OSTI]

    Ervin, Elizabeth K.

    PIEZOELECTRIC POWER SCAVENGING OF MECHANICAL VIBRATION ENERGY PIEZOELECTRIC POWER SCAVENGING OFPIEZOELECTRIC POWER SCAVENGING OF MECHANICAL VIBRATION ENERGYMECHANICAL VIBRATION ENERGY CE 511- Structural of mechanical vibration into electrical energy using piezoelectric material. #12;ENERGY CONVERSIONENERGY

  13. Vibration by relativistic effects

    E-Print Network [OSTI]

    Enrique Oradaz Romay

    2005-12-27

    Relativity, time reversal invariance in mechanics and principle of causality can be in the bases of a type of vibration of the extensive objects. It is because, the detailed analysis of the relativistic movement of an extensive body entail that all the objects must have inherent a vibratory movement to their own size. Such effect does not happen when it works with point particles thus is not stranger who happens unnoticed in the traditional studies. Also we can find relation between the form of vibration of the extensive objects and the energy that calculates by quantum considerations.

  14. Vibration Harvesting using Electromagnetic Transduction

    E-Print Network [OSTI]

    Waterbury, Andrew

    2011-01-01

    harvesting Microelectromechanical systems (MEMS) are smallMEMS Vibration Energy Harvesting Devices With Passive Resonance Frequency Adaptation Capability,” Microelectromechanical

  15. Nonlinear vibrational microscopy

    DOE Patents [OSTI]

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

    2000-01-01

    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.

  16. Vibration sensing method and apparatus

    DOE Patents [OSTI]

    Barna, Basil A. (Idaho Falls, ID)

    1989-04-25

    A method and apparatus for nondestructive evaluation of a structure is 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.

  17. Vibration sensing method and apparatus

    DOE Patents [OSTI]

    Barna, B.A.

    1987-07-07

    A method and apparatus for nondestructive evaluation of a structure is 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.

  18. Vibration sensing method and apparatus

    DOE Patents [OSTI]

    Barna, B.A.

    1989-04-25

    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.

  19. Localized Surface Plasmons in Vibrating Graphene Nanodisks

    E-Print Network [OSTI]

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

    2015-01-01

    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.

  20. Effective field theory for nuclear vibrations with quantified uncertainties

    E-Print Network [OSTI]

    Pérez, E A Coello

    2015-01-01

    We develop an effective field theory (EFT) for nuclear vibrations. The key ingredients - quadrupole degrees of freedom, rotational invariance, and a breakdown scale around the three-phonon level - are taken from data. The EFT is developed for spectra and electromagnetic moments and transitions. We employ tools from Bayesian statistics for the quantification of theoretical uncertainties. The EFT consistently describes spectra and electromagnetic transitions for $^{62}$Ni, $^{98,100}$Ru, $^{106,108}$Pd, $^{110,112,114}$Cd, and $^{118,120,122}$Te within the theoretical uncertainties. This suggests that these nuclei can be viewed as anharmonic vibrators.

  1. Vibration damping method and apparatus

    DOE Patents [OSTI]

    Redmond, James M. (Albuquerque, NM); Barney, Patrick S. (Albuquerque, NM); Parker, Gordon G. (Hougton, MI); Smith, David A. (Gainesville, FL)

    1999-01-01

    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.

  2. Vibration damping method and apparatus

    DOE Patents [OSTI]

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

    1999-06-22

    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.

  3. Electron Trapping by Molecular Vibration

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

    Electron Trapping by Molecular Vibration Print In photoelectron spectroscopy experiments performed at the ALS, a group of researchers has found that electronic transitions normally...

  4. Vibrational Spectroscopic Investigations of Sulfate Behavior at Environmental Interfaces

    E-Print Network [OSTI]

    Vibrational Spectroscopic Investigations of Sulfate Behavior at Environmental Interfaces 2012 #12;ii Abstract Chemical interactions that occur at the interface between two bulk isotropic media mineral/solution interfaces. Sulfate is a ubiquitous anion in the environment that plays a key role

  5. 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)

    1997-07-08

    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.

  6. Turbine blade vibration dampening

    DOE Patents [OSTI]

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

    1997-07-08

    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.

  7. Converged vibrational energy levels and quantum mechanical vibrational partition function of ethane

    E-Print Network [OSTI]

    Truhlar, Donald G

    Converged vibrational energy levels and quantum mechanical vibrational partition function of ethane­25 In this article, we report converged vibrational levels and converged quantum mechanical vibrational partition-0431 Received 25 January 2006; accepted 15 March 2006; published online 9 May 2006 The vibrational partition

  8. Vibration dampener for dampening vibration of a tubular member

    DOE Patents [OSTI]

    Obermeyer, Franklin D. (Pensacola, FL); Middlebrooks, Willis B. (Pensacola, FL); DeMario, Edmund E. (Columbia, SC)

    1994-01-01

    Vibration dampener for dampening vibration of a tubular member, such as an instrumentation tube of the type found in nuclear reactor pressure vessels. 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.

  9. Vibration dampener for dampening vibration of a tubular member

    DOE Patents [OSTI]

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

    1994-10-18

    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. Vibration Study of Concrete Beams 

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    of the ionization pathway allowed us to offer an estimate for both the rotational constants of the previously identified ion pair intermediate states, as well as the vibrational constants of the terminal chlorine oxide cation....

  11. Distributed optical fiber vibration sensing 

    E-Print Network [OSTI]

    Yu, Hui

    2001-01-01

    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. Quantum correlation dynamics in photosynthetic processes assisted by molecular vibrations

    E-Print Network [OSTI]

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

    2015-07-13

    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.

  13. Vibration suppression, stabilization, motion planning and tracking for flexible beams

    E-Print Network [OSTI]

    Siranosian, Antranik Antonio

    2009-01-01

    B.2 The Virtual Vibration Absorber and Polynomial B.3vi B Experimental Vibration Suppression Results . . . . .H. Chen and C. M. Liaw, “Vibration acceleration control of

  14. Determining the static electronic and vibrational energy correlations via twodimensional electronic-vibrational spectroscopy

    E-Print Network [OSTI]

    Dong, Hui; Lewis, Nicholas HC; Oliver, Thomas AA; Fleming, Graham R

    2015-01-01

    and vibrational transition energies, and ? 0 eg and ? g 0and vibrational transition energies. We also show themodi?es the electronic transition energy to capture a broad

  15. 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)

    2011-10-20

    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.

  16. Nonlinear Vibration in Gear Systems

    E-Print Network [OSTI]

    Grzegorz Litak; Michael I. Friswell

    2003-02-22

    Gear box dynamics is characterised by a periodically changing stiffness and a backlash which can lead to a loss of the contact between the teeth. Due to backlash, the gear system has piecewise linear stiffness characteristics and, in consequence, can vibrate regularly or chaoticaly depending on the system parameters and the initial conditions. We examine the possibility of a nonfeedback system control by introducing a weak resonant excitation term and through adding an additional degree of freedom to account for shaft flexibility on one side of the gearbox. We shall show that by correctly choosing the coupling values the system vibrations may be controlled.

  17. Visualization of vibration experienced in offshore platforms

    E-Print Network [OSTI]

    Patrikalakis, Alexander Marinos Charles

    2010-01-01

    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 ...

  18. Statistical energy analysis of nonlinear vibrating systems

    E-Print Network [OSTI]

    Spelman, G. M.; Langley, R. S.

    2015-01-01

    amplitude vibration, without the need for local contacts. Nonlinearity due purely to large amplitude vibration can then result in significant energy being found in frequency bands other than those being driven by external forces. To analyse...

  19. The decoupling of damped linear systems in oscillatory free vibration

    E-Print Network [OSTI]

    Ma, F; Imam, A; Morzfeld, M

    2009-01-01

    D.E. Newland, Mechanical Vibration Analysis and Computation,vibration Fai Ma , Ali Imam, Matthias Morzfeld Department of Mechanical

  20. Advances in Environmental Vibration Fifth International Symposium on Environmental Vibration, Chengdu, China, October 20-22, 2011

    E-Print Network [OSTI]

    Barkan, Christopher P.L.

    Advances in Environmental Vibration Fifth International Symposium on Environmental Vibration, Chengdu, China, October 20-22, 2011 Ballast Vibrations and Deformations due to Different Train Loading patterns on the vibration and permanent deformation accumulation trends of railroad ballast. As opposed

  1. Vibration Perception in Mobile Contexts Idin Karuei

    E-Print Network [OSTI]

    MacLean, Karon

    Vibration Perception in Mobile Contexts Idin Karuei , Zoltan Foley-Fisher , Sebastian Koch ABSTRACT Human sensitivity to vibration declines in mobile contexts. Designers of wearable haptic systems, and found that the thigh is least and the wrists the most sensitive of the sites tested. KEYWORDS:Vibration

  2. Ground Vibration Measurements at LHC Point 4

    SciTech Connect (OSTI)

    Bertsche, Kirk; /SLAC; Gaddi, Andrea; /CERN

    2012-09-17

    Ground vibration was measured at Large Hadron Collider (LHC) Point 4 during the winter shutdown in February 2012. This report contains the results, including power and coherence spectra. We plan to collect and analyze vibration data from representative collider halls to inform specifications for future linear colliders, such as ILC and CLIC. We are especially interested in vibration correlations between final focus lens locations.

  3. Vibrations, Quanta and Biology

    E-Print Network [OSTI]

    S. F. Huelga; M. B. Plenio

    2013-06-27

    Quantum biology is an emerging field of research that concerns itself with the experimental and theoretical exploration of non-trivial quantum phenomena in biological systems. In this tutorial overview we aim to bring out fundamental assumptions and questions in the field, identify basic design principles and develop a key underlying theme -- the dynamics of quantum dynamical networks in the presence of an environment and the fruitful interplay that the two may enter. At the hand of three biological phenomena whose understanding is held to require quantum mechanical processes, namely excitation and charge transfer in photosynthetic complexes, magneto-reception in birds and the olfactory sense, we demonstrate that this underlying theme encompasses them all, thus suggesting its wider relevance as an archetypical framework for quantum biology.

  4. 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)

    1989-01-01

    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.

  5. 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)

    2011-02-15

    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.

  6. Vibration-enhanced quantum transport

    E-Print Network [OSTI]

    F. L. Semião; K. Furuya; G. J. Milburn

    2010-08-17

    In this paper, we study the role of collective vibrational motion in the phenomenon of electronic energy transfer (EET) along a chain of coupled electronic dipoles with varying excitation frequencies. Previous experimental work on EET in conjugated polymer samples has suggested that the common structural framework of the macromolecule introduces correlations in the energy gap fluctuations which cause coherent EET. Inspired by these results, we present a simple model in which a driven nanomechanical resonator mode modulates the excitation energy of coupled quantum dots and find that this can indeed lead to an enhancement in the transport of excitations across the quantum network. Disorder of the on-site energies is a key requirement for this to occur. We also show that in this solid state system phase information is partially retained in the transfer process, as experimentally demonstrated in conjugated polymer samples. Consequently, this mechanism of vibration enhanced quantum transport might find applications in quantum information transfer of qubit states or entanglement.

  7. Reduced-vibration tube array

    DOE Patents [OSTI]

    Bruck, Gerald J.; Bartolomeo, Daniel R.

    2004-07-20

    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.

  8. Micro-scale piezoelectric vibration energy harvesting: from fixed-frequency to adaptable-frequency devices

    E-Print Network [OSTI]

    Miller, Lindsay Margaret

    2012-01-01

    energy . . . . . . . . . . . . . . . 1.2 Vibration energyfor incorporating measured ambient vibration into theSurvey of Ambient Vibrations A.1 Spectra of 23 vibration

  9. Actively controlled vibration welding system and method

    DOE Patents [OSTI]

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

    2013-04-02

    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.

  10. High force vibration testing with wide frequency range

    DOE Patents [OSTI]

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

    2013-04-02

    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.

  11. Coal storage hopper with vibrating screen agitator

    DOE Patents [OSTI]

    Daw, Charles S. (Knoxville, TN); Lackey, Mack E. (Oak Ridge, TN); Sy, Ronald L. (Clinton, TN)

    1984-01-01

    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 conveyor mechanism. The vibrating screen 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.

  12. Notes 10. The dynamic vibration absorber 

    E-Print Network [OSTI]

    San Andres, Luis

    2008-01-01

    system should be such that: TUNED ABSORBER ? X ? np = also known as a For example, if zero amplitude vibration is desired for excitations at the natural frequency of the original system, the designer selects A vibration absorber is a mechanical device... stream_source_info Notes_Vibration_Absorber_2008.pdf.txt stream_content_type text/plain stream_size 10660 Content-Encoding ISO-8859-1 stream_name Notes_Vibration_Absorber_2008.pdf.txt Content-Type text/plain; charset=ISO-8859...

  13. 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

  14. Vibrational cooling in a cold ion trap: Vibrationally resolved photoelectron spectroscopy of cold C60

    E-Print Network [OSTI]

    Simons, Jack

    Vibrational cooling in a cold ion trap: Vibrationally resolved photoelectron spectroscopy of cold C August 2005 We demonstrate vibrational cooling of anions via collisions with a background gas in an ion cold C60 - anions, produced by electrospray ionization and cooled in the cold ion trap, have been

  15. Localization of Free Vibration Modes in Systems of Nearly-Identical Vibration

    E-Print Network [OSTI]

    Shaw, Steven W.

    Localization of Free Vibration Modes in Systems of Nearly-Identical Vibration Absorbers A. S. Alsuwaiyan and S. W. Shaw Department of Mechanical Engineering Michigan State University, East Lansing, MI 48824, USA RUNNING HEADLINE: LOCALIZATION IN VIBRATION ABSORBERS #12;Abstract We demonstrate

  16. Vibrationally excited molecular hydrogen near Herschel 36

    SciTech Connect (OSTI)

    Rachford, Brian L. [Department of Physics, Embry-Riddle Aeronautical University, 3700 Willow Creek Road, Prescott, AZ 86301-3720 (United States); Snow, Theodore P. [Center for Astrophysics and Space Astronomy, Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309-0389 (United States); Ross, Teresa L., E-mail: rachf7ac@erau.edu [Department of Astronomy, New Mexico State University, Las Cruces, NM 88003-8001 (United States)

    2014-05-10

    We present the first high resolution UV spectra toward Herschel 36, a Trapezium-like system of high-mass stars contained within the Lagoon Nebula (M8, NGC 6523). The spectra reveal extreme rovibrational excitation of molecular hydrogen in material at a single velocity or very small range of velocities, with this component presumably lying near the star system and undergoing fluorescent excitation. The overall H{sub 2} excitation is similar to, but apparently larger than, that seen toward HD 37903 which previously showed the largest vibrationally excited H{sub 2} column densities seen in UV absorption spectra. While the velocities of the highly excited H{sub 2} lines are consistent within each observation, it appears that they underwent a ?60 km s{sup –1} redshift during the 3.6 yr between observations. In neither case does the velocity of the highly excited material match the velocity of the bulk of the line-of-sight material which appears to mostly be in the foreground of M8. Recent work shows unusually excited CH and CH{sup +} lines and several unusually broad diffuse interstellar bands toward Herschel 36. Along with the H{sub 2} excitation, all of these findings appear to be related to the extreme environment within ?0.1 pc of the massive young stellar system.

  17. Vibration-based structural health monitoring of highway bridges

    E-Print Network [OSTI]

    Guan, Hong

    2006-01-01

    and Stone, B. J. (1978). "A vibration technique for non-100. Allemang, R. J. (1999). "Vibrations: Experimental ModalJournal of Sound and Vibration , Golub, G. H. , and Van

  18. Preliminary Experiment for the Control of Cluster Vibration

    E-Print Network [OSTI]

    of Cluster Vibration for the Control of Cluster Vibration 99 7 20 1. 15 3 http-harmonic generation from laser irradiated clusters, it has been proved that laser induced cluster vibration

  19. Vibration suppression, stabilization, motion planning and tracking for flexible beams

    E-Print Network [OSTI]

    Siranosian, Antranik Antonio

    2009-01-01

    22] J. P. Den Hartog, Mechanical Vibrations, 3rd ed. McGraw-absorber reduces vibrations of a mechanical system it isimprove vibration suppression on a mechanical system forced

  20. System Dynamics and Vibration Lab Dept. of Mechanical Engineering

    E-Print Network [OSTI]

    Shaw, Steven W.

    System Dynamics and Vibration Lab Dept. of Mechanical Engineering Finite-Element-Based Modal Response --Recent Results · Conclusions #12;System Dynamics and Vibration Lab Dept. of Mechanical and Vibration Lab Dept. of Mechanical Engineering Motivation · Motivation --Flexible Structure, Complex Geometry

  1. System Dynamics and Vibration Lab Dept. of Mechanical Engineering

    E-Print Network [OSTI]

    Shaw, Steven W.

    System Dynamics and Vibration Lab Dept. of Mechanical Engineering Component Mode Synthesis Using #12;System Dynamics and Vibration Lab Dept. of Mechanical Engineering Outline · Motivation · Conclusions #12;System Dynamics and Vibration Lab Dept. of Mechanical Engineering Complex Structures

  2. TIME-RESOLVED VIBRATIONAL SPECTROSCOPY

    SciTech Connect (OSTI)

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

    2009-05-14

    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.

  3. September 2015 MSME in Dynamics and Vibration

    E-Print Network [OSTI]

    Feeny, Brian

    Arrival Spring Semester: 9cr ME 861 Advanced Dynamics 3 cr ME 814 Convective Heat Transfer (Breadth course and Research Topics Dynamics: Kinematics in two and three dimensions, Newton's equations of motion, energy body dynamics. (Mukherjee, Feeny) Vibration: Mathematical modeling of vibration systems using

  4. Vibrational Thermodynamics of Materials Brent Fultz

    E-Print Network [OSTI]

    Fultz, Brent

    Vibrational Thermodynamics of Materials Brent Fultz California Institute of Technology, W. M. Keck Laboratory, Pasadena CA 91125 USA July 6, 2009 Abstract. The literature on vibrational thermodynamics of harmonic phonons in alloys are organized into thermodynamic models for unmixing and ordering

  5. Imaging Mechanical Vibrations in Suspended Graphene Sheets

    E-Print Network [OSTI]

    McEuen, Paul L.

    Imaging Mechanical Vibrations in Suspended Graphene Sheets D. Garcia-Sanchez,, A. M. van der Zande was electrostatically driven at resonance using applied radio frequency voltages. The mechanical vibrations were of the shape of the mechanical eigenmodes. In as many as half the resonators measured, we observed a new class

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

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

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

  7. Passively damped vibration welding system and method

    DOE Patents [OSTI]

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

    2013-04-02

    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.

  8. Mechanism of bubble detachment from vibrating walls

    SciTech Connect (OSTI)

    Kim, Dongjun; Park, Jun Kwon Kang, Kwan Hyoung; Kang, In Seok

    2013-11-15

    We discovered a previously unobserved mechanism by which air bubbles detach from vibrating walls in glasses containing water. Chaotic oscillation and subsequent water jets appeared when a wall vibrated at greater than a critical level. Wave forms were developed at water-air interface of the bubble by the wall vibration, and water jets were formed when sufficiently grown wave-curvatures were collapsing. Droplets were pinched off from the tip of jets and fell to the surface of the glass. When the solid-air interface at the bubble-wall attachment point was completely covered with water, the bubble detached from the wall. The water jets were mainly generated by subharmonic waves and were generated most vigorously when the wall vibrated at the volume resonant frequency of the bubble. Bubbles of specific size can be removed by adjusting the frequency of the wall's vibration.

  9. Energy scavenging from environmental vibration.

    SciTech Connect (OSTI)

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

    2009-10-01

    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}.

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

    E-Print Network [OSTI]

    Darrell, T.

    2001-02-01

    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 ...

  11. Reduced vibration motor winding arrangement

    DOE Patents [OSTI]

    Slavik, C.J.; Rhudy, R.G.; Bushman, R.E.

    1997-11-11

    An individual phase winding arrangement having a sixty electrical degree phase belt width for use with a three phase motor armature includes a delta connected phase winding portion and a wye connected phase winding portion. Both the delta and wye connected phase winding portions have a thirty electrical degree phase belt width. The delta and wye connected phase winding portions are each formed from a preselected number of individual coils each formed, in turn, from an unequal number of electrical conductor turns in the approximate ratio of {radical}3. The individual coils of the delta and wye connected phase winding portions may either be connected in series or parallel. This arrangement provides an armature winding for a three phase motor which retains the benefits of the widely known and utilized thirty degree phase belt concept, including improved mmf waveform and fundamental distribution factor, with consequent reduced vibrations and improved efficiency. 4 figs.

  12. Reduced vibration motor winding arrangement

    DOE Patents [OSTI]

    Slavik, Charles J. (Rexford, NY); Rhudy, Ralph G. (Scotia, NY); Bushman, Ralph E. (Lathem, NY)

    1997-01-01

    An individual phase winding arrangement having a sixty electrical degree phase belt width for use with a three phase motor armature includes a delta connected phase winding portion and a wye connected phase winding portion. Both the delta and wye connected phase winding portions have a thirty electrical degree phase belt width. The delta and wye connected phase winding portions are each formed from a preselected number of individual coils each formed, in turn, from an unequal number of electrical conductor turns in the approximate ratio of .sqroot.3. The individual coils of the delta and wye connected phase winding portions may either be connected in series or parallel. This arrangement provides an armature winding for a three phase motor which retains the benefits of the widely known and utilized thirty degree phase belt concept, including improved mmf waveform and fundamental distribution factor, with consequent reduced vibrations and improved efficiency.

  13. 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

  14. World Views From fragmentation

    E-Print Network [OSTI]

    World Views From fragmentation to integration Diederik Aerts Leo Apostel Bart De Moor Staf in 1994 by VUB Press: Brussels Internet edition by Clément Vidal and Alexander Riegler #12;World Views 2................................................................................................................... 5 1.1 The fragmentation of our world

  15. Vibration modeling and supression in tennis racquets.

    SciTech Connect (OSTI)

    Farrar, C. R. (Charles R.); Buechler, M. A. (Miles A.); Espino, Luis; Thompson, G. A. (Gordon A.)

    2003-01-01

    The size of the 'sweet spot' is one measure of tennis racquet performance. In terms of vibration, the sweet spot is determined by the placement of nodal lines across the racquet head. In this studx the vibrational characteristics of a tennis racquet are explorod to discover the size and location of the sweet spot. A numerical model of the racquet is developed using finite element analysis and the model is verified using the results from an experimental modal analysis. The affects of string tension on the racquet's sweet spot and mode shapes are then quantified. An investigation is also carried out to determine how add-on vibrational datnpers affect the sweet spot.

  16. Lattice Vibrations and Superconductivity in Layered Structures 

    E-Print Network [OSTI]

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

    1970-01-01

    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...-layer films with masses m and M. 2 2570 LATTICE VIBRATIONS AND SUPE RCONDUCTIVITY IN ' ' ' 2571 tion in the o. direction (a = x, y, or z) for a particle in this monolayer vibrating in the mode with fre- quency e, and the other symbols have been defined...

  17. Recent Triplet Vibration Studies in RHIC

    SciTech Connect (OSTI)

    Thieberger, P.; Bonati, R.; Corbin, G.; Jain, A.; Minty, M.; McIntyre, G.; Montag, C.; Muratore, J.; Schultheiss, C.; Seberg, S.; Tuozzolo, J.

    2010-05-23

    We report on recent developments for mitigating vibrations of the quadrupole magnets near the interaction regions of the Relativistic Heavy Ion Collider (RHIC). High precision accelerometers, geophones, and a laser vibrometer were installed around one of the two interaction points to characterize the frequencies of the mechanical motion. In addition actuators were mounted directly on the quadrupole cryostats. Using as input the locally measured motion, dynamic damping of the mechanical vibrations has been demonstrated. In this report we present these measurements and measurements of the beam response. Future options for compensating the vibrations are discussed.

  18. Microelectromechanical power generator and vibration sensor

    DOE Patents [OSTI]

    Roesler, Alexander W. (Tijeras, NM); Christenson, Todd R. (Albuquerque, NM)

    2006-11-28

    A microelectromechanical (MEM) apparatus is disclosed which can be used to generate electrical power in response to an external source of vibrations, or to sense the vibrations and generate an electrical output voltage in response thereto. The MEM apparatus utilizes a meandering electrical pickup located near a shuttle which holds a plurality of permanent magnets. Upon movement of the shuttle in response to vibrations coupled thereto, the permanent magnets move in a direction substantially parallel to the meandering electrical pickup, and this generates a voltage across the meandering electrical pickup. The MEM apparatus can be fabricated by LIGA or micromachining.

  19. Quadratic Inverse Eigenvalue Problems, Active Vibration Control and Model Updating

    E-Print Network [OSTI]

    Datta, Biswa

    is an important practical problem that arises in a wide range of applications, including mechanical vibrations control (AVC) and finite element model updating (FEMU) in mechanical vibration. The active vibrationQuadratic Inverse Eigenvalue Problems, Active Vibration Control and Model Updating Biswa N. Datta,1

  20. Vibration Course Enhancement through a Dynamic Graphic User Interface

    E-Print Network [OSTI]

    Ervin, Elizabeth K.

    Vibration Course Enhancement through a Dynamic MATLAB® Graphic User Interface Elizabeth K. Ervin, vibration occurs all the time and everywhere. Although vibration is an everyday phenomenon, related topics have deeper understanding of vibration as well as inspire the interest of high school students

  1. PROOF-MASS INERTIAL VIBRATION CONTROL USING A SHUNTED

    E-Print Network [OSTI]

    Fleming, Andrew J.

    PROOF-MASS INERTIAL VIBRATION CONTROL USING A SHUNTED ELECTROMAGNETIC TRANSDUCER Andrew J. Fleming-mass dampers utilize a suspended mass to reduce the vibration experienced by a host structure. Active vibration vibration absorbtion. An electrical impedance is designed and connected to an electromagnetic coil

  2. MODELING AND CONTROL OF THE MECHATRONIC VIBRATIONAL UNIT

    E-Print Network [OSTI]

    MODELING AND CONTROL OF THE MECHATRONIC VIBRATIONAL UNIT I.I Blekhman-1 , Yu.A.Bortsov-2 , A.-Petersburg, Russia Abstract: The description of the multi-degree-of-freedom mechatronic vibrational unit is presented low-level control loops destruction. To study the control of vibrations the mechatronic vibrational

  3. Piezoresistive and Piezoelectric MEMS Strain Sensors for Vibration Detection

    E-Print Network [OSTI]

    Horowitz, Roberto

    , vibration 1. INTRODUCTION Vibrations are a common phenomena of mechanical structures that can be detrimental vibrations of the structure. In this case, sensors are applied to the mechanical structure to be monitoredPiezoresistive and Piezoelectric MEMS Strain Sensors for Vibration Detection Stanley Kona, Kenn

  4. November 16, 2005 MSEM in Dynamics and Vibration

    E-Print Network [OSTI]

    Feeny, Brian

    Mechanics (EM requirement) 3 cr ME 860 Theory of Vibration 3 cr (1) course from Mathematics or Statistics Continuum Mechanics (EM requirement) 3 cr ME 860 Theory of Vibration 3 cr (1) course from MathematicsNovember 16, 2005 MSEM in Dynamics and Vibration The dynamics and vibration track provides

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

    SciTech Connect (OSTI)

    Geiger, Franz

    2012-08-10

    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.

  6. Determining the static electronic and vibrational energy correlations via twodimensional electronic-vibrational spectroscopy

    E-Print Network [OSTI]

    Dong, Hui; Lewis, Nicholas HC; Oliver, Thomas AA; Fleming, Graham R

    2015-01-01

    Determining the static electronic and vibrational energythe signatures of a static correlation in 2DEV spectra withthe chromophore-solvent induce a static vari- ance of both

  7. Airfoil Vortex Induced Vibration suppression devices

    E-Print Network [OSTI]

    Lee, Evan J. (Evan Joseph)

    2007-01-01

    Vortex Induced Vibrations (VIV) is a major concern of the offshore oil industry. This problem leads to fatigue failure in the marine risers and causes costly replacement of the risers. Appendages such as helical strakes ...

  8. Electrostatic vibration-to-electric energy conversion

    E-Print Network [OSTI]

    Mur Miranda, José Oscar, 1972-

    2004-01-01

    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 ...

  9. Harvesting energy from non-ideal vibrations

    E-Print Network [OSTI]

    Chang, Samuel C

    2013-01-01

    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 ...

  10. 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 ...

  11. 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

    2008-10-21

    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.

  12. Skyrmion Vibration Modes within the Rational Map Ansatz

    E-Print Network [OSTI]

    W. T. Lin; B. Piette

    2008-04-30

    We study the vibration modes of the Skyrme model within the rational map ansatz. We show that the vibrations of the radial profiles and the rational maps are decoupled and we consider explicitly the case B=1, B=2 and B=4. We then compare our results with the vibration modes obtained numerically by Barnes et al. and show that qualitatively the rational map reproduces the vibration modes obtained numerically but that the vibration frequencies of these modes do not match very well.

  13. LEAM Film Development Vibration Test Report

    E-Print Network [OSTI]

    Rathbun, Julie A.

    LEAM Film Development Vibration Test Report Prepared by: L. Kaliniec MO. RIV. MO. ATM lOll PAGI 1 Of Z7 DATl! 6- 11 - 71 Approved by: ~~ P. Pilon r #12;LEAM Film Development Vibration Test Report OF LEVELS 7.3 FILM SUPPORT MESH 7.4 FILM FRAME MOUNTS 7.5 FILM FAILURES 8. CONCLUSIONS AND RECOMMENDATIONS 9

  14. Atmospheric Environment ] (

    E-Print Network [OSTI]

    Raman, Sethu

    that the influence of the urban region on wind patterns and atmospheric stability could be studied. HeightAtmospheric Environment ] (

  15. 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

  16. Vibrating wires for beam diagnostics

    E-Print Network [OSTI]

    Arutunian, S G; Wittenburg, Kay

    2015-01-01

    A new approach to the technique of scanning by wires is developed. Novelty of the method is that the wire heating quantity is used as a source of information about the number of interacting particles. To increase the accuracy and sensitivity of measurements the wire heating measurement is regenerated as a change of wire natural oscillations frequency. By the rigid fixing of the wire ends on the base an unprecedented sensitivity of the frequency to the temperature and to the corresponding flux of colliding particles. The range of used frequencies (tens of kHz) and speed of processes of heat transfer limit the speed characteristics of proposed scanning method, however, the high sensitivity make it a perspective one for investigation of beam halo and weak beam scanning. Traditional beam profile monitors generally focus on the beam core and loose sensitivity in the halo region where a large dynamic range of detection is necessary. The scanning by a vibrating wire can be also successfully used in profiling and det...

  17. Sustainable and equitable urban environments in Asia

    E-Print Network [OSTI]

    Badshah, Akhtar

    1993-01-01

    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 ...

  18. Effects of vocal fold epithelium removal on vibration in an excised human larynx model

    E-Print Network [OSTI]

    Tse, JR; Zhang, Z; Long, JL

    2015-01-01

    theory of vocal fold vibration,” in Speech Science: Recentclosure with in-phase vibration along the anterior-posteriorepithelium removal on vibration in an excised human larynx

  19. Vibration-based damage identification and health monitoring of civil structures

    E-Print Network [OSTI]

    He, Xianfei

    2008-01-01

    of New Carquinez Bridge using ambient vibration data. ”Conference on Experimental Vibration Analysis for Civil1997). “Free and ambient vibration of Brent-Spence Bridge. ”

  20. Uncertainty quantification in vibration-based structural health monitoring for enhanced decision-making capability

    E-Print Network [OSTI]

    Mao, Zhu

    2012-01-01

    5  1.2.1. System identification and vibration-based20  2. Vibration-based inspection and SHMsystems from changes in their vibration characteristics: a

  1. Analysis of Shear-horizontal Vibrations of Crystal Plates for Acoustic Wave Resonators and Sensors

    E-Print Network [OSTI]

    Liu, Bo

    2010-01-01

    devices are based on mechanical vibration modes and waves.capacitance because mechanical vibration of the resonator iscapacitance because mechanical vibration of the resonator is

  2. Micro-scale piezoelectric vibration energy harvesting: from fixed-frequency to adaptable-frequency devices

    E-Print Network [OSTI]

    Miller, Lindsay Margaret

    2012-01-01

    scale piezoelectric mechanical vibration energy harvesting.convert ambient mechanical vibration energy into electrical28]. Ambient mechanical vibrations from machinery can also

  3. A Performance Comparison of Features Used in Vibration- Based Health Monitoring of a Complex Mechanism /

    E-Print Network [OSTI]

    Zsiga, Luke Mathieson

    2013-01-01

    convert from a mechanical vibration to an audible pressurethe vibrations generated by the mechanical actions of theand mechanical systems from changes in their vibration

  4. Fields of View for Environmental Radioactivity

    E-Print Network [OSTI]

    Malins, Alex; Machida, Masahiko; Takemiya, Hiroshi; Saito, Kimiaki

    2015-01-01

    The gamma component of air radiation dose rates is a function of the amount and spread of radioactive nuclides in the environment. These radionuclides can be natural or anthropogenic in origin. The field of view describes the area of radionuclides on, or below, the ground that is responsible for determining the air dose rate, and hence correspondingly the external radiation exposure. This work describes Monte Carlo radiation transport calculations for the field of view under a variety of situations. Presented first are results for natural 40K and thorium and uranium series radionuclides distributed homogeneously within the ground. Results are then described for atmospheric radioactive caesium fallout, such as from the Fukushima Daiichi Nuclear Power Plant accident. Various stages of fallout evolution are considered through the depth distribution of 134Cs and 137Cs in soil. The fields of view for the natural radionuclides and radiocaesium are different. This can affect the responses of radiation monitors to th...

  5. Implausibility of the vibrational theory of olfaction

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

    Block, Eric; Ertem, Mehmed Z.; Jang, Seogjoo; Matsunami, Hiroaki; Sekharan, Sivakumar; Dethier, Berenice; Gundala, Sivaji; Pan, Yi; Li, Shengju; Li, Zhen; et al

    2015-04-21

    The vibrational theory of olfaction assumes that electron transfer occurs across odorants at the active sites of odorant receptors (ORs), serving as a sensitive measure of odorant vibrational frequencies, ultimately leading to olfactory perception. A previous study reported that human subjects differentiated hydrogen/deuterium isotopomers (isomers with isotopic atoms) of the musk compound cyclopentadecanone as evidence supporting the theory. Here, we find no evidence for such differentiation at the molecular level. In fact, we find that the human musk-recognizing receptor, OR5AN1, identified using a heterologous OR expression system and robustly responding to cyclopentadecanone and muscone, fails to distinguish isotopomers of thesemore »compounds in vitro. Furthermore, the mouse (methylthio)methanethiol (MTMT)-recognizing receptor, MOR244-3, and other selected human and mouse ORs, responded similarly to normal, deuterated, and ¹³C isotopomers of their respective ligands, paralleling our results with the musk receptor OR5AN1. These findings suggest that the proposed vibration theory does not apply to the human musk receptor OR5AN1, mouse thiol receptor MOR244-3, or other ORs examined. Also, contrary to the vibration theory predictions, muscone-d?? lacks the 1,380-1,550 cm?¹ IR bands claimed to be essential for musk odor. Furthermore, our theoretical analysis shows that the proposed electron transfer mechanism of the vibrational frequencies of odorants could be easily suppressed by quantum effects of non-odorant molecular vibrational modes. As a result, these and other concerns about electron transfer at ORs, together with our extensive experimental data, argue against the plausibility of the vibration theory.« less

  6. 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

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

    SciTech Connect (OSTI)

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

    1988-02-01

    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.

  8. Mechanical vibration to electrical energy converter

    DOE Patents [OSTI]

    Kellogg, Rick Allen (Tijeras, NM); Brotz, Jay Kristoffer (Albuquerque, NM)

    2009-03-03

    Electromechanical devices that generate an electrical signal in response to an external source of mechanical vibrations can operate as a sensor of vibrations and as an energy harvester for converting mechanical vibration to electrical energy. The devices incorporate a magnet that is movable through a gap in a ferromagnetic circuit, wherein a coil is wound around a portion of the ferromagnetic circuit. A flexible coupling is used to attach the magnet to a frame for providing alignment of the magnet as it moves or oscillates through the gap in the ferromagnetic circuit. The motion of the magnet can be constrained to occur within a substantially linear range of magnetostatic force that develops due to the motion of the magnet. The devices can have ferromagnetic circuits with multiple arms, an array of magnets having alternating polarity and, encompass micro-electromechanical (MEM) devices.

  9. Surrogate Spent Nuclear Fuel Vibration Integrity Investigation

    SciTech Connect (OSTI)

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

    2014-01-01

    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.

  10. Whole body vibration alters proprioception in the trunk

    E-Print Network [OSTI]

    Li, Lu; Lamis, Farhana; Wilson, Sara E.

    2008-01-01

    Occupational whole body vibration has long been associated with low back injuries. However, the mechanism of these injuries is not well understood. In this paper, the effect of whole body vibration on proprioception and dynamic stability...

  11. Apparatus and method of preloading vibration-damping bellows

    DOE Patents [OSTI]

    Cutburth, Ronald W. (Tracy, CA)

    1988-01-01

    An improved vibration damping bellows mount or interconnection is disclosed. In one aspect, the bellows is compressively prestressed along its length to offset vacuum-generated tensile loads and thereby improve vibration damping characteristics.

  12. METHODOLOGY The vibration is described in a piecewise fashion as

    E-Print Network [OSTI]

    Ervin, Elizabeth K.

    as nuclear (steam generator tubes, reactor rods) petroleum (drillstrings, piping systems) biomedical anti-resonance exists, signifying passive vibration control targeted at specific excitation frequencies beam stiffness creates passive vibration control. FUTURE WORK Experimental studies verifying trend

  13. Shape memory alloy for vibration isolation and damping 

    E-Print Network [OSTI]

    Machado, Luciano G

    2008-10-10

    This work investigates the use of shape memory alloys (SMAs) for vibration isolation and damping of mechanical systems. The first part of this work evaluates the nonlinear dynamics of a passive vibration isolation and ...

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

    E-Print Network [OSTI]

    Cao, Wenwu

    Electromechanical 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 backing indicated degraded performance when compared to values predicted from the electromechanical

  15. Modeling of thermally induced vibration of carbon Contents list

    E-Print Network [OSTI]

    Maruyama, Shigeo

    Modeling of thermally induced vibration of carbon nanotubes ( ) #12;#12;Contents list 1 modeling ....................................................................... 6 1.3 Thermal-Mechanical vibration ...................................................................... 12 2.1.1 Cantilevered SWNT

  16. Automated Synthesis of Mechanical Vibration Absorbers Using Genetic Programming

    E-Print Network [OSTI]

    Hu, Jianjun

    Automated Synthesis of Mechanical Vibration Absorbers Using Genetic Programming Jianjun Hu Program an automated methodology for open-ended synthesis of mechanical vibration absorbers based on genetic, 48824 Ronald Rosenberg Department of Mechanical Engineering, Michigan State University, East Lansing, MI

  17. Seismic, shock, and vibration isolation 1995. PVP-Volume 319...

    Office of Scientific and Technical Information (OSTI)

    Seismic, shock, and vibration isolation 1995. PVP-Volume 319 Citation Details In-Document Search Title: Seismic, shock, and vibration isolation 1995. PVP-Volume 319 The papers in...

  18. 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)

    2014-10-21

    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.

  19. 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

  20. Vibration-based Terrain Classification Using Support Vector Machines

    E-Print Network [OSTI]

    Zell, Andreas

    Vibration-based Terrain Classification Using Support Vector Machines Christian Weiss, Holger Fr a method for terrain classification based on vibration induced in the vehicle's body. An accelerometer mounted on the vehicle measures the vibration perpendicular to the ground surface. We experimentally

  1. ORIGINAL PAPER Vibration detection and discrimination in the masked birch

    E-Print Network [OSTI]

    Yack, Jayne E.

    ORIGINAL PAPER Vibration detection and discrimination in the masked birch caterpillar (Drepana-Verlag 2012 Abstract Leaf-borne vibrations are potentially important to caterpillars for communication they detect and discriminate between vibrations from relevant and non-relevant sources. We measured

  2. ACTIVE VIBRATION CONTROL OF A SMART BEAM Yavuz Yaman1

    E-Print Network [OSTI]

    Yaman, Yavuz

    1 ACTIVE VIBRATION CONTROL OF A SMART BEAM Yavuz Yaman1 , Tarkan Çalikan1 , Volkan Nalbantolu2, Collingwood, Ontario, Canada ABSTRACT This study presents an active vibration control technique applied this reduced model, presents the design of an active vibration controller which effectively suppresses

  3. Correcting vibration-induced performance degradation in enterprise servers

    E-Print Network [OSTI]

    Simunic, Tajana

    Correcting vibration-induced performance degradation in enterprise servers Christine S. Chan.gross, kaylan.vaidyanathan}@oracle.com ABSTRACT Server fan subsystems are power-hungry and generate vibrations types of vibrations and quantify their effect on hard disks. We introduce a thermal and cooling

  4. An Integrated Measurement to Road Vibration Simulation System

    E-Print Network [OSTI]

    Birdsong, Charles

    An Integrated Measurement to Road Vibration Simulation System Charles Birdsong, Ph.D. Dactron Inc and replication of vibrations for product testing. Important issues such as data verification, compensation for vibrations measured on a Jeep, compensated, and replicated on an electrodynamic shaker. Introduction

  5. Vibration Enhances Geometry Perception with Tactile Shape Displays Mara Oyarzbal *

    E-Print Network [OSTI]

    Tachi, Susumu

    Vibration Enhances Geometry Perception with Tactile Shape Displays María Oyarzábal * Masashi, but little is known about the effects of vibrating displayed shapes. This study examines passive touch, but it was readily detected when the pattern was vibrated at 5 Hz. A central raised bar was incorrectly perceived

  6. Vibration-Assisted Electron Tunneling in C140 Transistors

    E-Print Network [OSTI]

    McEuen, Paul L.

    Vibration-Assisted Electron Tunneling in C140 Transistors A. N. Pasupathy, J. Park, C. Chang, A. V C140, a molecule with a mass-spring-mass geometry chosen as a model system to study electron-vibration coupling. We observe vibration-assisted tunneling at an energy corresponding to the stretching mode of C140

  7. ALSEP Array E Component Non-Operating Vibration Specifications

    E-Print Network [OSTI]

    Rathbun, Julie A.

    ALSEP Array E Component Non-Operating Vibration Specifications INO. ATM-964 1 REV. NO. OF 6 IPAGE DATE 2/2/71 This memorandum defines the non-operating vibration specifications for the ALSEP Array E experiments and other major subsystems. : #12;NO. R"EV. NO. ALSEP Array E Component Non-Operating Vibration

  8. Variational Structure of Inverse Problems in Wave Propagation and Vibration

    E-Print Network [OSTI]

    Variational Structure of Inverse Problems in Wave Propagation and Vibration James G. Berryman in wave propagation (traveltime tomography) and two examples in vibration (the plucked string and free.'' For vibrating systems, the apparently very complex behavior of an excited string, drumhead, or the Earth can

  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 Portobello Street, Sheffield S1 4DP, UK EMail: gopi@dcs.shef.ac.uk Abstract The vibration signatures of combining neural nets in majority voting systems. 1 Introduction Vibrations in a reciprocating internal

  10. November 16, 2005 MSME in Dynamics and Vibration

    E-Print Network [OSTI]

    Feeny, Brian

    and Vibration Spring Arrival Spring Semester: 9cr ME 861 Advanced Dynamics 3 cr ME 814 Convective Heat Transfer and Research Topics Dynamics: Kinematics in two and three dimensions, Newton's equations of motion, energy body dynamics. (Shaw, Haddow, Feeny) Vibration: Mathematical modeling of vibration systems using

  11. Vibrational Mechanics: Nonlinear Dynamic Effects, General Ap-proach, Applications

    E-Print Network [OSTI]

    van der Heijden, Gert

    Review of: Vibrational Mechanics: Nonlinear Dynamic Effects, General Ap- proach, Applications Iliya a general mechanical approach (and philosophy) for the study of problems involving vibrations motion is considered. Equation (6) is the main equation of what the author calls vibrational mechanics

  12. --MECH 505 (Section 201) --INDUSTRIAL and ENVIRONMENTAL ACOUSTICS AND VIBRATION

    E-Print Network [OSTI]

    Phani, A. Srikantha

    -- MECH 505 (Section 201) -- INDUSTRIAL and ENVIRONMENTAL ACOUSTICS AND VIBRATION Instructor: Dr and Noise Control, Harris (MH and Sedgwick) Noise and Vibration Control Engineering, Beranek (MH and Sedgwick) "Noise Control: Principles and Practice" (MH) Shock and Vibration Handbook, Harris and Crede (MH

  13. SUSPENSION VIBRATION COMPENSATION USING A MEMS MICROACTUATOR IN HARD

    E-Print Network [OSTI]

    Horowitz, Roberto

    SUSPENSION VIBRATION COMPENSATION USING A MEMS MICROACTUATOR IN HARD DISK DRIVES Tsung-Lin Chen Kenn Oldham Yunfeng Li Roberto Horowitz ,1,2 Department of Mechanical Engineering, University of a prototype MEMS microactuator and vibration sensors, and controller design for suspension vibration

  14. Active Vibration Suppression of Sandwich Beams using Piezoelectric Shear Actuators

    E-Print Network [OSTI]

    Vel, Senthil

    on the effectiveness of the piezo- electric shear mechanism for active vibration suppression. In this paper, weActive Vibration Suppression of Sandwich Beams using Piezoelectric Shear Actuators Senthil S. Vel1 of the piezoelectric actuators to cause transverse shear deformation of the sandwich beam. Active vibration suppression

  15. sustainable environment

    E-Print Network [OSTI]

    change · Build management skills for policy development sustainable resource management Cefas helpssustainable resource management environment fisheries aquaculture Cefas capability statement #12;sustainable resource management 4 managing environmental resources 4 institutional development 5 an integrated

  16. 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

  17. Evaluation of a vibration source detection scheme

    SciTech Connect (OSTI)

    Jendrzejczyk, J.A.; Wambsganss, M.W.; Smith, R.K.

    1992-04-01

    When the Advanced Photon Source (APS) facility is commissioned, there will be many potential sources of local ground motion excitation (near-field sources). Some of these may be of sufficient amplitude and at a specific frequency so as to be detrimental to the stability of the storage ring beamline. A sampling of possible sources is as follows: 2500-hp chillers in the utility building; six cooling-tower fans that are powered by 75-hp electric motors; various water circulation pumps; power supplies, controllers, and transformers; and air-handling units and associated fans. To detect equipment that causes excessive ground excitation at a site as large as the APS, it will be necessary to have a validated source detection scheme. When performing low-amplitude vibration testing in and around Building 335 of Argonne National Laboratory (ANL), we observed a cyclic 8-Hz vibration. The cyclic nature of the signal is apparent in Fig. 1, which represents data measured on the floor at the main level of Building 335 on March 31, 1992. A simple vibration source location scheme, based on triangulation, was evaluated as a means to locate the source of the 8-Hz vibration and is the subject of this technical note. 1 ref.

  18. SATURATION COMPENSATING INPUT SHAPERS FOR REDUCING VIBRATION

    E-Print Network [OSTI]

    Singhose, William

    input shaper and feedback controller was successfully implemented by Drapeau and Wang on a five-bar The Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta, GA 30332, USA ABSTRACT Input shaping can be used to eliminate or greatly reduce residual vibration of flexible mechanical

  19. Neuromotor Transmissibility of Horizontal Seatpan Vibration

    E-Print Network [OSTI]

    Channamallu, Raghu Ram

    2007-12-16

    for a frequency range of 3-14 Hz at 1 RMS (ms-2) and 2 RMS (ms-2) vibration magnitudes. The mechanical transmission to lumbar rotations did not exhibit resonance within the measured frequency range without the backrest. The mechanical transmission with a...

  20. Microscopic description of nuclear vibrations: Relativistic QRPA and its extensions with quasiparticle-vibration coupling

    E-Print Network [OSTI]

    Elena Litvinova; Victor Tselyaev

    2013-08-14

    The recent extensions of the covariant energy density functional theory with the quasiparticle-vibration coupling (QVC) are reviewed. Formulation of the Quasiparticle Random Phase Approximation (QRPA) in the relativistic framework is discussed. Self-consistent extensions of the relativistic QRPA imply the QVC which is implemented in two-body propagators in the nuclear medium. This provides fragmentation of the QRPA states describing the damping of the vibrational motion.

  1. Optical vibration detection spectral analysis assembly and method for detecting vibration in an object of interest

    DOE Patents [OSTI]

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

    1998-01-01

    A vibration detection assembly is described which includes an emitter of light which has object and reference beams, the object beam reflected off of a vibrating object of interest; and a photorefractive substance having a given response time and which passes the reflected object beam and the reference beam, the reference beam and the object beam interfering within the photorefractive substance to create a space charge field which develops within the response time of the photorefractive substance.

  2. Optical vibration detection spectral analysis assembly and method for detecting vibration in an object of interest

    DOE Patents [OSTI]

    Hale, T.C.; Telschow, K.L.

    1998-10-27

    A vibration detection assembly is described which includes an emitter of light which has object and reference beams, the object beam reflected off of a vibrating object of interest; and a photorefractive substance having a given response time and which passes the reflected object beam and the reference beam, the reference beam and the object beam interfering within the photorefractive substance to create a space charge field which develops within the response time of the photorefractive substance. 6 figs.

  3. Vibrational lifetimes and vibrational line positions in polyatomic supercritical fluids near the critical point

    E-Print Network [OSTI]

    Fayer, Michael D.

    of the asymmetric (T1u) CO stretching mode of W CO 6 in supercritical CO2, C2H6, and CHF3 as a function of solvent spectra of W CO 6 and Rh CO 2acac in supercritical CO2, C2H6, and CHF3 acquired for the same isothermsVibrational lifetimes and vibrational line positions in polyatomic supercritical fluids near

  4. Downhole Vibration Monitoring and Control System

    SciTech Connect (OSTI)

    Martin E. Cobern

    2007-09-30

    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.

  5. Mining Views: Database Views for Data Mining Hendrik Blockeel #1

    E-Print Network [OSTI]

    Antwerpen, Universiteit

    Mining Views: Database Views for Data Mining Hendrik Blockeel #1 , Toon Calders 2 , Elisa Fromont adriana.prado}@ua.ac.be Abstract-- We present a system towards the integration of data mining mining views. We show that several types of patterns and models over the data, such as itemsets

  6. Mining Views: Database Views for Data Mining Hendrik Blockeel1

    E-Print Network [OSTI]

    Antwerpen, Universiteit

    Mining Views: Database Views for Data Mining Hendrik Blockeel1 , Toon Calders2 , Elisa Fromont1 model towards the inte- gration of data mining into relational database systems, based on the so called virtual mining views. We show that several types of patterns and models over the data, such as itemsets

  7. 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

  8. The photodissociation and reaction dynamics of vibrationally excited molecules

    SciTech Connect (OSTI)

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

    1993-12-01

    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.

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

    DOE Patents [OSTI]

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

    2004-02-17

    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.

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

    E-Print Network [OSTI]

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

    2015-06-01

    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%).

  11. Ion aggregation in high salt solutions. III. Computational vibrational spectroscopy of HDO in aqueous salt solutions

    SciTech Connect (OSTI)

    Choi, Jun-Ho; Lim, Sohee; Chon, Bonghwan; Cho, Minhaeng; Kim, Heejae; Kim, Seongheun

    2015-05-28

    The vibrational frequency, frequency fluctuation dynamics, and transition dipole moment of the O—D stretch mode of HDO molecule in aqueous solutions are strongly dependent on its local electrostatic environment and hydrogen-bond network structure. Therefore, the time-resolved vibrational spectroscopy the O—D stretch mode has been particularly used to investigate specific ion effects on water structure. Despite prolonged efforts to understand the interplay of O—D vibrational dynamics with local water hydrogen-bond network and ion aggregate structures in high salt solutions, still there exists a gap between theory and experiment due to a lack of quantitative model for accurately describing O—D stretch frequency in high salt solutions. To fill this gap, we have performed numerical simulations of Raman scattering and IR absorption spectra of the O—D stretch mode of HDO in highly concentrated NaCl and KSCN solutions and compared them with experimental results. Carrying out extensive quantum chemistry calculations on not only water clusters but also ion-water clusters, we first developed a distributed vibrational solvatochromic charge model for the O—D stretch mode in aqueous salt solutions. Furthermore, the non-Condon effect on the vibrational transition dipole moment of the O—D stretch mode was fully taken into consideration with the charge response kernel that is non-local polarizability density. From the fluctuating O—D stretch mode frequencies and transition dipole vectors obtained from the molecular dynamics simulations, the O—D stretch Raman scattering and IR absorption spectra of HDO in salt solutions could be calculated. The polarization effect on the transition dipole vector of the O—D stretch mode is shown to be important and the asymmetric line shapes of the O—D stretch Raman scattering and IR absorption spectra of HDO especially in highly concentrated NaCl and KSCN solutions are in quantitative agreement with experimental results. We anticipate that this computational approach will be of critical use in interpreting linear and nonlinear vibrational spectroscopies of HDO molecule that is considered as an excellent local probe for monitoring local electrostatic and hydrogen-bonding environment in not just salt but also other confined and crowded solutions.

  12. Protective laser beam viewing device

    DOE Patents [OSTI]

    Neil, George R.; Jordan, Kevin Carl

    2012-12-18

    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.

  13. Vibrational mode multiplexing of ultracold atoms

    E-Print Network [OSTI]

    S. Martínez-Garaot; E. Torrontegui; Xi Chen; M. Modugno; D. Guéry-Odelin; Shuo-Yen Tseng; J. G. Muga

    2015-09-08

    Sending multiple messages on qubits encoded in different vibrational modes of cold atoms or ions along a transmission waveguide requires to merge first and then separate the modes at input and output ends. Similarly, different qubits can be stored in the modes of a trap and be separated later. We design the fast splitting of a harmonic trap into an asymmetric double well so that the initial ground vibrational state becomes the ground state of one of two final wells, and the initial first excited state becomes the ground state of the other well. This might be done adiabatically by slowly deforming the trap. We speed up the process by inverse engineering a double-function trap using dynamical invariants. The separation (demultiplexing) followed by an inversion of the asymmetric bias and then by the reverse process (multiplexing) provides a population inversion protocol based solely on trap reshaping.

  14. Transportation Shock and Vibration Literature Review

    SciTech Connect (OSTI)

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

    2013-06-06

    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.

  15. 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

    2014-10-14

    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.

  16. Vibration welding system with thin film sensor

    DOE Patents [OSTI]

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

    2014-03-18

    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.

  17. Wave turbulence buildup in a vibrating plate

    E-Print Network [OSTI]

    Auliel, Maria Ines; Mordant, Nicolas

    2015-01-01

    We report experimental and numerical results on the buildup of the energy spectrum in wave turbulence of a vibrating thin elastic plate. Three steps are observed: first a short linear stage, then the turbulent spectrum is constructed by the propagation of a front in wave number space and finally a long time saturation due to the action of dissipation. The propagation of a front at the second step is compatible with scaling predictions from the Weak Turbulence Theory.

  18. Theoretical rotation-vibration spectrum of thioformaldehyde

    SciTech Connect (OSTI)

    Yachmenev, Andrey; Polyak, Iakov; Thiel, Walter

    2013-11-28

    We present a variational calculation of the first comprehensive T = 300 K rovibrational line list for thioformaldehyde, H{sub 2}CS. It covers 41?809 rovibrational levels for states up to J{sub max} = 30 with vibrational band origins up to 5000 cm{sup ?1} and provides the energies and line intensities for 547?926 transitions from the ground vibrational state to these levels. It is based on our previously reported accurate ab initio potential energy surface and a newly calculated ab initio dipole moment surface. Minor empirical adjustments are made to the ab initio equilibrium geometry to reduce systematic errors in the predicted intra-band rotational energy levels. The rovibrational energy levels and transition intensities are computed variationally by using the methods implemented in the computer program TROVE. Transition wavelengths and intensities are found to be in excellent agreement with the available experimental data. The present calculations correctly reproduce the observed resonance effects, such as intensity borrowing, thus reflecting the high accuracy of the underlying ab initio surfaces. We report a detailed analysis of several vibrational bands, especially those complicated by strong Coriolis coupling, to facilitate future laboratory assignments.

  19. Vibrations of Sessile Drops of Soft Hydrogels

    E-Print Network [OSTI]

    Aditi Chakrabarti; Manoj K. Chaudhury

    2014-10-08

    Sessile drops of soft hydrogels were vibrated vertically by subjecting them to a mechanically induced Gaussian white noise. Power spectra of the surface fluctuation of the gel allowed identification of its resonant frequency that decreases with their mass, but increases with its shear modulus. The principal resonant frequencies of the spheroidal modes of the gel of shear moduli ranging from 55 Pa to 290 Pa were closest to the lowest Rayleigh mode of vibration of a drop of pure water. These observations coupled with the fact that the resonance frequency varies inversely as the square root of the mass in all cases suggest that they primarily correspond to the capillary (or a pseudo-capillary) mode of drop vibration. The contact angles of the gel drops also increase with the modulus of the gel. When the resonance frequencies are corrected for the wetting angles, and plotted against the fundamental frequency scale (gamma/mu)^0.5, all the data collapse nicely on a single plot provided that the latter is shifted by a shear modulus dependent factor (1+mu.L/gamma). A length scale L, independent of both the modulus and the mass of the drop emerges from such a fit.

  20. Mountain View, California: Fiat Res Publica

    E-Print Network [OSTI]

    Tung, Gregory

    1989-01-01

    Mountain View, California: Fiat Res Publica Gregory Tungundifferen­ tiated. In Mountain View, California (populationtoward San Francisco. Mountain View is avoiding a "just say

  1. False color viewing device

    DOE Patents [OSTI]

    Kronberg, J.W.

    1991-05-08

    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.

  2. False color viewing device

    DOE Patents [OSTI]

    Kronberg, J.W.

    1992-10-20

    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.

  3. False color viewing device

    DOE Patents [OSTI]

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

    1992-01-01

    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.

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

    SciTech Connect (OSTI)

    Stefanko, D.; Herbert, J.

    2012-01-10

    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. Communication: The influence of vibrational parity in chiral photoionization dynamics

    SciTech Connect (OSTI)

    Powis, Ivan

    2014-03-21

    A pronounced vibrational state dependence of photoelectron angular distributions observed in chiral photoionization experiments is explored using a simple, yet realistic, theoretical model based upon the transiently chiral molecule H{sub 2}O{sub 2}. The adiabatic approximation is used to separate vibrational and electronic wavefunctions. The full ionization matrix elements are obtained as an average of the electronic dipole matrix elements over the vibrational coordinate, weighted by the product of neutral and ion state vibrational wavefunctions. It is found that the parity of the vibrational Hermite polynomials influences not just the amplitude, but also the phase of the transition matrix elements, and the latter is sufficient, even in the absence of resonant enhancements, to account for enhanced vibrational dependencies in the chiral photoionization dynamics.

  6. Forced Vibration Testing of a Four Story RC Building Utilizing the nees@UCLA Mobile Field Laboratory

    E-Print Network [OSTI]

    Yu, Eunjong; Skolnik, Derek; Whang, Daniel; Wallace, J W

    2006-01-01

    0486. Yu, E. , 2005. Forced vibration testing and analyticalbetween Ambient and Forced Vibration Experiments, EarthquakeUSA Paper No. 1566 FORCED VIBRATION TESTING OF A FOUR STORY

  7. Forced Vibration Testing of a Four-Story Reinforced Concrete Building Utilizing the nees@UCLA Mobile Field Laboratory

    E-Print Network [OSTI]

    Yu, Eunjong; Skolnik, Derek; Whang, Daniel H.; Wallace, John W.

    2008-01-01

    J. B. , 1972. Forced vibration of a tall steel- framebetween ambient and forced vibration experiments, Earth-systems from changes in their vibration characteristics: A

  8. Auto-acoustic compaction in steady shear flows: experimental evidence for the suppression of shear dilatancy by internal acoustic vibration

    E-Print Network [OSTI]

    Van der Elst, Nicholas J; Brodsky, Emily E; Le Bas, Pierre-Yves; Johnson, Paul A.

    2012-01-01

    by internal acoustic vibration Nicholas J. van der Elst, 1by internal acoustic vibration, J. Geophys. Res. , 117,generated acoustic vibration. By examining the response to

  9. Active Vibration Control on A 3-DOF Parallel Platform Based on Kane's Dynamics Method

    E-Print Network [OSTI]

    Li, Yangmin

    - 2783 - Active Vibration Control on A 3-DOF Parallel Platform Based on Kane's Dynamics Method Yuan be impossible without a careful isolation of the instrument from the vibration sources. To reduce the vibration low remaining vibration level. This paper is concerned with the development of a vibration isolation

  10. A direct evidence of vibrationally delocalized response at ice surface

    SciTech Connect (OSTI)

    Ishiyama, Tatsuya; Morita, Akihiro

    2014-11-14

    Surface-specific vibrational spectroscopic responses at isotope diluted ice and amorphous ice are investigated by molecular dynamics (MD) simulations combined with quantum mechanics/molecular mechanics calculations. The intense response specific to the ordinary crystal ice surface is predicted to be significantly suppressed in the isotopically diluted and amorphous ices, demonstrating the vibrational delocalization at the ordinary ice surface. The collective vibration at the ice surface is also analyzed with varying temperature by the MD simulation.

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

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

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

  12. In-situ characterization of plasma modified surfaces by vibrational...

    Office of Scientific and Technical Information (OSTI)

    In-situ characterization of plasma modified surfaces by vibrational sum frequency generation spectroscopy. Citation Details In-Document Search Title: In-situ characterization of...

  13. Integral twist actuation of helicolpter rotor blades for vibration reduction

    E-Print Network [OSTI]

    Shin, SangJoon, 1967-

    2001-01-01

    Active integral twist control for vibration reduction of helicopter rotors during forward flight is investigated. The twist deformation is obtained using embedded anisotropic piezocomposite actuators. An analytical framework ...

  14. Learning methods for machine vibration analysis and health monitoring

    E-Print Network [OSTI]

    Duin, Robert P.W.

    and gearbox vibration . . . . . . . . . . . . . . . . . . . . . 13 1.2.3 Wear and fault development pump . . . . . . . . . . . . . 48 iii #12;iv CONTENTS 3.2 Equispaced frequencies model

  15. IN OTHER CATEGORIES; MACHINERY; MASS BALANCE; MECHANICAL VIBRATIONS...

    Office of Scientific and Technical Information (OSTI)

    world Bracher, B. 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; MACHINERY; MASS BALANCE; MECHANICAL VIBRATIONS; MAINTENANCE; REPAIR Field balancing can achieve significant...

  16. Coal storage hopper with vibrating-screen agitator

    DOE Patents [OSTI]

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

    1982-04-27

    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.

  17. Vibrational spectra of nanowires measured using laser doppler...

    Office of Scientific and Technical Information (OSTI)

    of nanowires measured using laser doppler vibrometry and STM studies of epitaxial graphene : an LDRD fellowship report. Citation Details In-Document Search Title: Vibrational...

  18. Community, 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAuditsCluster Compatibilitydefault SignEnvironment

  19. Modal Identification Study of Vincent Thomas Bridge Using Simulated Wind-Induced Ambient Vibration Data

    E-Print Network [OSTI]

    He, Xianfei; Moaveni, Babak; Conte, Joel P; Elgamal, Ahmed; Masri, Sami F.

    2008-01-01

    Journal of Sound and Vibration, 225 (1), 153-170. Matsumoto,systems from changes in their vibration characteristics: Aheaving and torsional vibration of bridge decks: the case of

  20. Control relevant identification of plant and disturbance dynamics with application to noise and vibration control

    E-Print Network [OSTI]

    Zeng, Jie

    2006-01-01

    Journal of Sound and Vibration, 206(4):453–471, 1997. [6] L.and I. L. Ver. Noise and Vibration Control Engineering :Journal of Sound and Vibration, 75(1):127–134, 1981. [18] S.

  1. Active Vibration Suppression of Sandwich Beams using Piezoelectric Shear Actuators: Experiments and

    E-Print Network [OSTI]

    Vel, Senthil

    Active Vibration Suppression of Sandwich Beams using Piezoelectric Shear Actuators: Experiments assessment of the vibration suppression of smart structures using piezoelectric shear actuators. Experimental of the sandwich beam. Active vibration suppression is achieved using either positive position feedback or strain

  2. 2004 ABAQUS Users' Conference 81 Utilizing ABAQUS to Analyze the Active Vibration

    E-Print Network [OSTI]

    Vel, Senthil

    2004 ABAQUS Users' Conference 81 Utilizing ABAQUS to Analyze the Active Vibration Suppression be utilized in the numerical simulation of active feedback control for the purpose of vibration suppression from previous work. Keywords: Active Vibration Suppression, Composites, Dynamics, Piezoelectric Shear

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

    E-Print Network [OSTI]

    Rodriguez, John Israel, 1972-

    2003-01-01

    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 ...

  4. The decoupling of damped linear systems in free or forced vibration

    E-Print Network [OSTI]

    Ma, F; Morzfeld, M; Imam, A

    2010-01-01

    D.E. Newland, Mechanical Vibration Analysis and Computation,vibration Fai Ma , Matthias Morzfeld, Ali Imam Department of MechanicalVibration [38] P. Lancaster, I. Zaballa, Diagonalizable quadratic eigenvalue problems, Mechanical

  5. Viewing Conditions and Chromatic Adaptation

    E-Print Network [OSTI]

    Majumder, Aditi

    Linear nonlinear #12;2 Viewing field Self-luminous displays CRT, LCD Reflective media Painting Viewing: Adapting stimulus Subscript E: Equal energy illumination #12;13 Fairchild's model (1991) Inter channel brightness #12;6 11 Definition of Color Appearance Model so much description of color such as: wavelength

  6. Environment matters

    SciTech Connect (OSTI)

    NONE

    2005-07-01

    This year's annual review is devoted to the theme of environmental health. It contains: an overview by the Director of the World Bank's Environment Department, J. Warren Evans; viewpoints on health risks of environmental pollution, integrating health concerns into carbon planning, sanitation in the world's poorest countries and impacts of indoor air pollution on health; and reviews on the World Bank's efforts to adapt safeguards to demanding priorities and on the Banks' 2005 environmental portfolio. Feature articles include a review of the Bank's Clean Air Initiative (now active in Africa, South and East Asia and Latin America). Reviews of work in the Bank's six regions focus on efforts to address the linkages among poverty, environmental pollution and human health.

  7. Universality of Vibrational Spectra of Globular Proteins

    E-Print Network [OSTI]

    Na, Hyuntae; ben-Avraham, Daniel

    2015-01-01

    It is shown that the density of modes of the vibrational spectrum of globular proteins is universal, i.e., regardless of the protein in question it closely follows one universal curve. The present study, including 135 proteins analyzed with a full atomic empirical potential (CHARMM22) and using the full complement of all atoms Cartesian degrees of freedom, goes far beyond confirming previous claims of universality, finding that universality holds even in the high-frequency range (300- 4000 1/cm), where peaks and turns in the density of states are faithfully reproduced from one protein to the next. We also characterize fluctuations of the spectral density from the average, paving the way to a meaningful discussion of rare, unusual spectra and the structural reasons for the deviations in such "outlier" proteins. Since the method used for the derivation of the vibrational modes (potential energy formulation, set of degrees of freedom employed, etc.) has a dramatic effect on the spectral density, another signific...

  8. Resonant vibrational energy transfer in ice Ih

    SciTech Connect (OSTI)

    Shi, L.; Li, F.; Skinner, J. L.

    2014-06-28

    Fascinating anisotropy decay experiments have recently been performed on H{sub 2}O ice Ih by Timmer and Bakker [R. L. A. Timmer, and H. J. Bakker, J. Phys. Chem. A 114, 4148 (2010)]. The very fast decay (on the order of 100 fs) is indicative of resonant energy transfer between OH stretches on different molecules. Isotope dilution experiments with deuterium show a dramatic dependence on the hydrogen mole fraction, which confirms the energy transfer picture. Timmer and Bakker have interpreted the experiments with a Förster incoherent hopping model, finding that energy transfer within the first solvation shell dominates the relaxation process. We have developed a microscopic theory of vibrational spectroscopy of water and ice, and herein we use this theory to calculate the anisotropy decay in ice as a function of hydrogen mole fraction. We obtain very good agreement with experiment. Interpretation of our results shows that four nearest-neighbor acceptors dominate the energy transfer, and that while the incoherent hopping picture is qualitatively correct, vibrational energy transport is partially coherent on the relevant timescale.

  9. Representing Thermal Vibrations and Uncertainty in Molecular Surfaces

    E-Print Network [OSTI]

    Varshney, Amitabh

    in a molecule is fuzzy because of its uncertainty in protein structure determination and thermal energy because of its thermal energy. Therefore, the smooth molecular surface will also vibrate. Also in proteinRepresenting Thermal Vibrations and Uncertainty in Molecular Surfaces Chang Ha Lee and Amitabh

  10. Vibration dissipation mount for motors or the like

    DOE Patents [OSTI]

    Small, Thomas R. (Brookeville, MD)

    1987-01-01

    A vibration dissipation mount which permits the mounting of a motor, generator, or the like such that the rotatable shaft thereof passes through the mount and the mount permits the dissipation of self-induced and otherwise induced vibrations wherein the mount comprises a pair of plates having complementary concave and convex surfaces, a semi-resilient material being disposed therebetween.

  11. 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)

    2000-01-01

    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.

  12. 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

  13. Assigning vibrational polyads using relative equilibria. Application to ozone

    E-Print Network [OSTI]

    Sadovskií, Dmitrií

    Assigning vibrational polyads using relative equilibria. Application to ozone I. N. Kozin a,1 , D equilibria. We use the ozone molecule as a concrete example where n­polyads or ``hyperpolyads'' should structure of the vibrational levels of ozone. We consider the classical mechanical analogue

  14. Estimation of the optimal damping for mechanical vibrating systems

    E-Print Network [OSTI]

    Truhar, Ninoslav

    Estimation of the optimal damping for mechanical vibrating systems NinoslavTruhar, Zoran University of Osijek Series: Technical Reports #12;ESTIMATION OF THE OPTIMAL DAMPING FOR MECHANICAL VIBRATING in mechanical systems. Our algorithm optimize simultaneously the dampers' positions and their viscosities

  15. Vibration Analysis of Wiresaw Manufacturing Processes and Wafer Surface Measurements

    E-Print Network [OSTI]

    Kao, Imin

    Vibration Analysis of Wiresaw Manufacturing Processes and Wafer Surface Measurements I. Kao (PI), S. Wei, F-P. Chiang Department of Mechanical Engineering, SUNY Stony Brook, NY 11794-2300 Abstract the yield per crystal and to reduce the cost. In this paper, the vibration model of wiresaw system

  16. Design of Vibration Absorbers for Step Motions and Step Disturbances

    E-Print Network [OSTI]

    Singhose, William

    Design of Vibration Absorbers for Step Motions and Step Disturbances Joel Fortgang William Singhose Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332 Mechanical or from external disturbances. The technique of adding a vibration ab- sorber has proven useful

  17. Vibration-based damage identification and health monitoring of civil structures

    E-Print Network [OSTI]

    He, Xianfei

    2008-01-01

    of Structural and Mechanical Vibrations . Prentice Hall.mechanical systems from changes in their vibrationmechanical systems from changes in their vibration

  18. 2010 GRC VIBRATIONAL SPECTROSCOPY AUGUST 1 - AUGUST 6, 2010

    SciTech Connect (OSTI)

    Brooks Pate

    2010-08-06

    The Vibrational Spectroscopy conference focuses on using vibrational spectroscopy to probe 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 the application of these techniques in chemistry, materials, biology, and medicine. The theory of molecular vibrational motion and its connection to spectroscopic signatures and chemical reaction dynamics is the third major theme of the meeting. The goal is to bring 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 and nanomaterials.

  19. Landscape viewing in metropolitan Boston

    E-Print Network [OSTI]

    Teas, Wendy Ann

    1990-01-01

    This thesis recognizes the importance of landscape viewing, especially as a solitary act of contemplation. It suggests the creation of a place from which to gaze upon a vast landscape. It postulates that an observation ...

  20. A Regulator's View of Cogeneration 

    E-Print Network [OSTI]

    Shanaman, S. M.

    1982-01-01

    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...

  1. Vibrational Heat Transport in Molecular Junctions

    E-Print Network [OSTI]

    Segal, Dvira

    2015-01-01

    We review studies of vibrational energy transfer in a molecular junction geometry, consisting of a molecule bridging two heat reservoirs, solids or large chemical compounds. This setup is of interest for applications in molecular electronics, thermoelectrics, and nanophononics, and for addressing basic questions in the theory of classical and quantum transport. Calculations show that system size, disorder, structure, dimensionality, internal anharmonicities, contact interaction, and quantum coherent effects, are factors that interplay to determine the predominant mechanism (ballistic/diffusive), effectiveness (poor/good) and functionality (linear/nonlinear) of thermal conduction at the nanoscale. We review recent experiments and relevant calculations of quantum heat transfer in molecular junctions. We recount the Landauer approach, appropriate for the study of elastic (harmonic) phononic transport, and outline techniques which incorporate molecular anharmonicities. Theoretical methods are described along with...

  2. Reusable vibration resistant integrated circuit mounting socket

    DOE Patents [OSTI]

    Evans, Craig N. (Irwin, PA)

    1995-01-01

    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.

  3. Ordering and Dynamics of Vibrated Hard Squares

    E-Print Network [OSTI]

    Lee Walsh; Narayanan Menon

    2015-10-02

    We study an experimental system of hard granular squares in two dimensions, energized by vibration. The interplay of order in the orientations and positions of anisotropic particles allows for a rich set of phases. We measure the structure and dynamics of steady states as a function of particle density. This allows us to identify a progression of phases in which a low density isotropic fluid gives way to a phase with tetratic orientational order, short-range translational correlations, and slowed rotational dynamics. In this range of density we also observe a coupling between the orientational order and bond-orientational order. At higher densities, the particles freeze into a translationally and orientationally ordered square crystalline phase in which translational diffusion is suppressed.

  4. Fast atomic transport without vibrational heating

    E-Print Network [OSTI]

    E. Torrontegui; S. Ibáñez; Xi Chen; A. Ruschhaupt; D. Guéry-Odelin; J. G. Muga

    2010-10-15

    We use the dynamical invariants associated with the Hamiltonian of an atom in a one dimensional moving trap to inverse engineer the trap motion and perform fast atomic transport without final vibrational heating. The atom is driven non-adiabatically through a shortcut to the result of adiabatic, slow trap motion. For harmonic potentials this only requires designing appropriate trap trajectories, whereas perfect transport in anharmonic traps may be achieved by applying an extra field to compensate the forces in the rest frame of the trap. The results can be extended to atom stopping or launching. The limitations due to geometrical constraints, energies and accelerations involved are analyzed, as well as the relation to previous approaches (based on classical trajectories or "fast-forward" and "bang-bang" methods) which can be integrated in the invariant-based framework.

  5. Conversation View Outlook Web App User Guide

    E-Print Network [OSTI]

    Calgary, University of

    Conversation View Outlook Web App User Guide Email conversations that include multiple replies and sent messages can be viewed simultaneously using Conversation View. In Exchange 2010 Outlook Web App

  6. Vibration-Induced Conductivity Fluctuation (VICOF) Testing of Soils

    E-Print Network [OSTI]

    Laszlo B. Kish; Cristine L. S. Morgan; Andrea Sz. Kishne

    2006-07-30

    In this Letter, we propose and experimentally demonstrate a simple method to provide additional in-formation by conductivity measurements of soils. The AC electrical conductance of the soil is measured while it is exposed to a periodic vibration. The vibration-induced density fluctuation implies a corresponding conductivity fluctuation that can be seen as combination frequency components, the sum and the difference of the mean AC frequency and the double of vibration frequency, in the current response. The method is demonstrated by measurements on clayey and sandy soils.

  7. Vibrational Softening of a Protein on Ligand Binding

    SciTech Connect (OSTI)

    Balog, Erica [Semmelweis University, Budapest, Hungary; Perahia, David [Ecole Normale Superieure de Cachan, Cachan, France; Smith, Jeremy C [ORNL; Merzel, Franci [National Institute of Chemistry, Solvenia

    2011-01-01

    Neutron scattering experiments have demonstrated that binding of the cancer drug methotrexate softens the low-frequency vibrations of its target protein, dihydrofolate reductase (DHFR). Here, this softening is fully reproduced using atomic detail normal-mode analysis. Decomposition of the vibrational density of states demonstrates that the largest contributions arise from structural elements of DHFR critical to stability and function. Mode-projection analysis reveals an increase of the breathing-like character of the affected vibrational modes consistent with the experimentally observed increased adiabatic compressibility of the protein on complexation.

  8. 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

    2007-02-27

    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.

  9. 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

    2011-03-02

    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.

  10. Active Vibration Control Based on a 3-DOF Dual Compliant Parallel Robot Using LQR Algorithm

    E-Print Network [OSTI]

    Li, Yangmin

    Active Vibration Control Based on a 3-DOF Dual Compliant Parallel Robot Using LQR Algorithm Yuan a careful isolation of the instrument from the vibration sources by adopting active vibration isolation system to achieve a very low remaining vibration level especially for the very low frequency under 10Hz

  11. Enhancement of high-harmonic generation by laser-induced cluster vibration

    E-Print Network [OSTI]

    Enhancement of high-harmonic generation by laser-induced cluster vibration Yen-Mu Chen,1,2 Ming a new tool for studying the vibrational dynamics of nanometer atomic clusters. © 2007 Optical Society vibration was reported [8], and the results indicate that HHG is a very sensitive probe for vibrational

  12. Spectroscopy and reactions of vibrationally excited transient molecules

    SciTech Connect (OSTI)

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

    1993-12-01

    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.

  13. Mathematical modeling of mechanical vibration assisted conductivity imaging

    E-Print Network [OSTI]

    Ammari, Habib; Kwon, Hyeuknam; Seo, Jin Keun; Woo, Eung Je

    2014-01-01

    This paper aims at mathematically modeling a new multi-physics conductivity imaging system incorporating mechanical vibrations simultaneously applied to an imaging object together with current injections. We perturb the internal conductivity distribution by applying time-harmonic mechanical vibrations on the boundary. This enhances the effects of any conductivity discontinuity on the induced internal current density distribution. Unlike other conductivity contrast enhancing frameworks, it does not require a prior knowledge of a reference data. In this paper, we provide a mathematical framework for this novel imaging modality. As an application of the vibration-assisted impedance imaging framework, we propose a new breast image reconstruction method in electrical impedance tomography (EIT). As its another application, we investigate a conductivity anomaly detection problem and provide an efficient location search algorithm. We show both analytically and numerically that the applied mechanical vibration increas...

  14. 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. ...

  15. Active vibration damping in the presence of uncertainties.

    SciTech Connect (OSTI)

    Farrar, C. R. (Charles R.); Eisenhour, T. A. (Travis A.); Hatchett, S. (Sam); Salazar, I. (Isaac)

    2002-01-01

    Several control design techniques including PlD, LQG, and PPF are investigated For adive vibration damping of a cantilever beam with uncertain boundary conditions. Step disturbances were used to evaluate the performance of the designed controllers.

  16. Vibration Isolation of a Locomotive Mounted Energy Storage Flywheel 

    E-Print Network [OSTI]

    Zhang, Xiaohua

    2011-02-22

    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...

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

    E-Print Network [OSTI]

    Du Toit, Noël Eduard

    2005-01-01

    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 ...

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

    E-Print Network [OSTI]

    Zuo, Lei, 1974-

    2005-01-01

    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 ...

  19. GBT MEMO 161 Approaches to the GBT vibration problem

    E-Print Network [OSTI]

    Wells, Donald C.

    implications: (1) the subreflector is unlikely to ``pump'' feedarm vibrations, and (2) wear on the gear train) positive feedback, (2) excessive wear and (3) gear train backlash. The feedback problem is that the system

  20. Quantum Chaos in Vibrational Nuclei: the Green Function Approach

    E-Print Network [OSTI]

    V. R. Manfredi; M. Rosa-Clot; L. Salasnich; S. Taddei

    1995-10-06

    We show that the collective vibrational model of atomic nuclei displays quantum chaos. To avoid the problems related to the tunneling effects, a Green function deterministic numerical method has been used to evaluate the energy levels.

  1. 13.013J Dynamics and Vibration, Fall 2002

    E-Print Network [OSTI]

    Patrikalakis, N. M. (Nicholas M.)

    Introduction to dynamics and vibration of lumped-parameter models of mechanical systems. Three-dimensional particle kinematics. Force-momentum formulation for systems of particles and for rigid bodies (direct method). ...

  2. Magnetic induction systems to harvest energy from mechanical vibrations

    E-Print Network [OSTI]

    Jonnalagadda, Aparna S

    2007-01-01

    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. ...

  3. Control of Vibration in Mechanical Systems Using Shaped Reference Inputs

    E-Print Network [OSTI]

    Meckl, Peter Heinrich

    1988-01-01

    Dynamic systems which undergo rapid motion can excite natural frequencies that lead to residual vibration at the end of motion. This work presents a method to shape force profiles that reduce excitation energy at the ...

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

    E-Print Network [OSTI]

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

    2013-01-01

    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 ...

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

    E-Print Network [OSTI]

    Minier, Elizabeth Altagracia

    1992-01-01

    STRUCTURAL VIBRATION MEASUREMENT AND ANALYSIS USING A NOVEL DIGITAL SENSOR A Thesis by ELIZABETH ALTAGRACIA MINIER 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 STRUCTURAL VIBRATION MEASUREMENT AND ANALYSIS USING A NOVEL DIGITAL SENSOR A Thesis by ELIZABETH ALTAGRACIA MINIER Approved as to style and content by: Thomas C. Pollock (Chair...

  6. Optical manipulation of intrinsic localized vibrational energy in cantilever arrays

    E-Print Network [OSTI]

    M. Sato; B. E. Hubbard; A. J. Sievers; B. Ilic; H. G. Craighead

    2004-03-16

    Optically-induced real-time impurity modes are used to shepherd intrinsic localized vibrational modes (discrete breathers) along micromechanical arrays via either attractive or replulsive interactions. Adding an electrode to the cantilever array provides control of the sign of lattice anharmonicity, hence allowing both hard and soft nonlinearities to be studied. A number of dynamical effects are demonstrated and explained, including the optical tweezing of localized vibrational energy in a nonlinear lattice.

  7. Vibration Model Validation for Linear Collider Detector Platforms

    SciTech Connect (OSTI)

    Bertsche, Kirk; Amann, J.W.; Markiewicz, T.W.; Oriunno, M.; Weidemann, A.; White, G.; /SLAC

    2012-05-16

    The ILC and CLIC reference designs incorporate reinforced-concrete platforms underneath the detectors so that the two detectors can each be moved onto and off of the beamline in a Push-Pull configuration. These platforms could potentially amplify ground vibrations, which would reduce luminosity. In this paper we compare vibration models to experimental data on reinforced concrete structures, estimate the impact on luminosity, and summarize implications for the design of a reinforced concrete platform for the ILC or CLIC detectors.

  8. An experimental study of torsional vibration measurement / b 

    E-Print Network [OSTI]

    French, Robert Sheldon

    1981-01-01

    INSTRUMENTATION 28 Strain Gauge Wheatstone Bridge. 28 Magnetic Transducer 31 FM Systems ? TV-1 and FC-62 33 Vibration Envelope Detector, Nicolet Spectrum Analyzer and Sideband Analysis. 36 37 CHAPTER IV PROCEDURES 45 Steady State Testing, Transient... Testing. 46 49 CHAPTER V RESULTS AND DISCUSSION. 51 Steady State Testing, 51 FM Systems ? Dual Channel TV-1 and FC-62. 60 vii TABLE OF CONTENTS (Cont'd) PAGE Amplitude Demodulation ? Vibration Envelope Detector. . Sideband Analysis. 62 65...

  9. 0-7803-8808-9/05/$20.00 2005 IEEE An Environment for Runtime Power Monitoring

    E-Print Network [OSTI]

    Milenkovi, Aleksandar

    University of Alaska Fairbanks Fairbanks, AK 99775-5915 d.raskovic@uaf.edu Key Words: Power Consumption for a long period of time under stringent resource and energy constraints. Energy conservation and power or use energy extracted from the environment, such as solar energy or vibrations. Runtime power

  10. Wide field of view telescope

    DOE Patents [OSTI]

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

    2008-01-15

    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.

  11. Vibration-Based Damage Detection in Rotating Machinery

    SciTech Connect (OSTI)

    Farrar, C.R.; Duffey, T.A.

    1999-06-28

    Damage detection as determined from changes in the vibration characteristics of a system has been a popular research topic for the last thirty years. Numerous damage identification algorithms have been proposed for detecting and locating damage in structural and mechanical systems. To date, these damage-detection methods have shown mixed results. A particular application of vibration-based damage detection that has perhaps enjoyed the greatest success is that of damage detection in rotating machinery. This paper summarizes the state of technology in vibration-based damage detection applied to rotating machinery. The review interprets the damage detection process in terms of a statistical pattern recognition paradigm that encompasses all vibration-based damage detection methods and applications. The motivation for the study reported herein is to identify the reasons that vibration-based damage detection has been successfully applied to rotating machinery, but has yet to show robust applications to civil engineering infrastructure. The paper concludes by comparing and contrasting the vibration-based damage detection applied to rotating machinery with large civil engineering infrastructure applications.

  12. 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)

    1991-01-01

    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.

  13. 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

    1991-12-31

    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.

  14. Vibration of Generalized Double Well Oscillators

    E-Print Network [OSTI]

    Grzegorz Litak; Marek Borowiec; Arkadiusz Syta

    2006-10-20

    We have applied the Melnikov criterion to examine a global homoclinic bifurcation and transition to chaos in a case of a double well dynamical system with a nonlinear fractional damping term and external excitation. The usual double well Duffing potential having a negative square term and positive quartic term has been generalized to a double well potential with a negative square term and a positive one with an arbitrary real exponent $q > 2$. We have also used a fractional damping term with an arbitrary power $p$ applied to velocity which enables one to cover a wide range of realistic damping factors: from dry friction $p \\to 0$ to turbulent resistance phenomena $p=2$. Using perturbation methods we have found a critical forcing amplitude $\\mu_c$ above which the system may behave chaotically. Our results show that the vibrating system is less stable in transition to chaos for smaller $p$ satisfying an exponential scaling low. The critical amplitude $\\mu_c$ as an exponential function of $p$. The analytical results have been illustrated by numerical simulations using standard nonlinear tools such as Poincare maps and the maximal Lyapunov exponent. As usual for chosen system parameters we have identified a chaotic motion above the critical Melnikov amplitude $\\mu_c$.

  15. 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

  16. The Catalog View Feature dataset

    E-Print Network [OSTI]

    The Catalog View Feature dataset Hydrography Geometric network HYDRO_NET Polygon feature class defines by FIPS 103, next six digits is a randomly assigned sequential number unique within a CatalogingSeep FCode 485 Water IntakeOutflow Resolution Resolution FCode 48500 Water IntakeOutflow FCode 487 Waterfall

  17. Part I -Mechanics M05M.1 -Vibration Damping With a Piston M05M.1 -Vibration Damping With a Piston

    E-Print Network [OSTI]

    Petta, Jason

    Part I - Mechanics M05M.1 - Vibration Damping With a Piston M05M.1 - Vibration Damping With a Piston Problem Sometimes it is required to reduce the influence of vertical floor vibration larger than atmospheric pressure. The pistons are typically equipped with a mechanism to dampen

  18. View

    E-Print Network [OSTI]

    2006-02-28

    Feb 28, 2006 ... AMS 2000 Subject Classification: Primary: ... of free NSO solvers, a possible reason is the lack of a significant library of NSO test functions.

  19. Hydrogen local vibrational modes in semiconductors

    SciTech Connect (OSTI)

    McCluskey, M D

    1997-06-01

    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.

  20. Optimal cooling of a driven artificial atom in dissipative environment

    E-Print Network [OSTI]

    Lingjie Du; Yang Yu

    2013-06-02

    We study microwave-driven cooling in a superconducting flux qubit subjected to environment noises. For the weak decoherence, our analytical results agree well with the experimental observations near the degeneracy point and show that the microwave amplitude for optimal cooling should depend linearly on the dc flux detuning. With the decoherence increasing, more vibrational degrees of freedom couple in, making the ordinary cooling method less effective or even fail. We propose an improved cooling method, which can eliminate the perturbation of additional vibrational degrees of freedom hence keep high efficiency even under the strong decoherence. Furthermore, we point out that the decoherence will modulate the frequency where microwave-driven Landau-Zener transition reaches maximum in both methods, displaying the feature of incoherent dynamics which is important for the optimal cooling of qubits and other quantum systems.

  1. Views of the solar system

    SciTech Connect (OSTI)

    Hamilton, C.

    1995-02-01

    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.

  2. Views of wireless network systems.

    SciTech Connect (OSTI)

    Young, William Frederick; Duggan, David Patrick

    2003-10-01

    Wireless networking is becoming a common element of industrial, corporate, and home networks. Commercial wireless network systems have become reliable, while the cost of these solutions has become more affordable than equivalent wired network solutions. The security risks of wireless systems are higher than wired and have not been studied in depth. This report starts to bring together information on wireless architectures and their connection to wired networks. We detail information contained on the many different views of a wireless network system. The method of using multiple views of a system to assist in the determination of vulnerabilities comes from the Information Design Assurance Red Team (IDART{trademark}) Methodology of system analysis developed at Sandia National Laboratories.

  3. For current viewing resistor loads

    DOE Patents [OSTI]

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

    2011-04-19

    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.

  4. Coherent exciton dynamics in the presence of underdamped vibrations

    E-Print Network [OSTI]

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

    2014-12-22

    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.

  5. ENVIRONMENT AVIATION, ENERGY

    E-Print Network [OSTI]

    Peraire, Jaime

    TRANSPORT ASSOCIATION PRESIDENT AND CEO, CONGRESSIONAL TESTIMONY, 200712 Aviation, environment, and energy

  6. Smart Environments: Middleware Building Blocks for Pervasive Network Computing (A Position Paper)

    E-Print Network [OSTI]

    Weissman, Jon

    Smart Environments: Middleware Building Blocks for Pervasive Network Computing (A Position Paper effortless manner. In this position paper, we introduce the notion of a ``smart service'' -- services to form ``smart environments.'' Smart environments present an integrated view of services to the user

  7. Investigation of the effect of shock, vibration, surface texture and surface pattern on the dynamics of the head disk interface

    E-Print Network [OSTI]

    Murthy, Aravind N.

    2007-01-01

    110 5.2.3. Summary for Vibrations in 1-inch HDDs . . . . . .Investigation of Shock and Vibration Response in 1-inch FormResponse of 1-inch Form Factor Disk Drives to Vibration

  8. 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)

    2010-03-23

    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.

  9. Non-linear optical crystal vibration sensing device

    DOE Patents [OSTI]

    Kalibjian, Ralph (Livermore, CA)

    1994-01-11

    A non-linear optical crystal vibration sensing device (10) including a photorefractive crystal (26) and a laser (12). The laser (12 ) produces a coherent light beam (14) which is split by a beam splitter (18) into a first laser beam (20) and a second laser beam (22). After passing through the crystal (26) the first laser beam (20) is counter-propagated back upon itself by a retro-mirror (32), creating a third laser beam (30). The laser beams (20, 22, 30) are modulated, due to the mixing effect within the crystal (26) by vibration of the crystal (30). In the third laser beam (30), modulation is stable and such modulation is converted by a photodetector (34) into a usable electrical output, intensity modulated in accordance with vibration applied to the crystal (26).

  10. Low Head, Vortex Induced Vibrations River Energy Converter

    SciTech Connect (OSTI)

    Bernitsas, Michael B.; Dritz, Tad

    2006-06-30

    Vortex Induced Vibrations Aquatic Clean Energy (VIVACE) is a novel, demonstrated approach to extracting energy from water currents. This invention is based on a phenomenon called Vortex Induced Vibrations (VIV), which was first observed by Leonardo da Vinci in 1504AD. He called it ‘Aeolian Tones.’ For decades, engineers have attempted to prevent this type of vibration from damaging structures, such as offshore platforms, nuclear fuel rods, cables, buildings, and bridges. The underlying concept of the VIVACE Converter is the following: Strengthen rather than spoil vortex shedding; enhance rather than suppress VIV; harness rather than mitigate VIV energy. By maximizing and utilizing this unique phenomenon, VIVACE takes this “problem” and successfully transforms it into a valuable resource for mankind.

  11. Non-linear optical crystal vibration sensing device

    DOE Patents [OSTI]

    Kalibjian, R.

    1994-08-09

    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.

  12. The Equal Weight View, Agreement, and Commutativity 

    E-Print Network [OSTI]

    Buckler, Rose

    2011-11-23

    This paper investigates Elga’s (2007) Equal Weight View (EWV) and its consequences when understood as a view requiring epistemic peers to ‘split the difference’ following disagreement. The traditional disagreement debate ...

  13. View from the Bridge | Department of Energy

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

    View from the Bridge View from the Bridge This presentation gives an overview of Caterpillar's R&D focus on advanced diesel engines and exhaust aftertreatment. deer08utley.pdf...

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

    E-Print Network [OSTI]

    2011-01-01

    Summit on America’s Energy Future (2008), http://www.natural gas. California’s Energy Future - The View to 2050supply California’ s Energy Future - The View to 2050 and

  15. Bottlenecks to vibrational energy flow in OCS: Structures and mechanisms

    E-Print Network [OSTI]

    Paškauskas, R; Uzer, T

    2008-01-01

    Finding the causes for the nonstatistical vibrational energy relaxation in the planar carbonyl sulfide (OCS) molecule is a longstanding problem in chemical physics: Not only is the relaxation incomplete long past the predicted statistical relaxation time, but it also consists of a sequence of abrupt transitions between long-lived regions of localized energy modes. We report on the phase space bottlenecks responsible for this slow and uneven vibrational energy flow in this Hamiltonian system with three degrees of freedom. They belong to a particular class of two-dimensional invariant tori which are organized around elliptic periodic orbits. We relate the trapping and transition mechanisms with the linear stability of these structures.

  16. 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

    2014-03-04

    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.

  17. Simulations of vibrational relaxation in dense molecular fluids

    SciTech Connect (OSTI)

    Holian, B.L.

    1985-07-01

    In the understanding of high-temperatre and -pressure chemistry in explosives, first step is the study of the transfer of energy from translational degrees of freedom into internal vibrations of the molecules. We present new methods using nonequilibrium molecular dynamics (NEMD) for measuring vibrational relaxation in a diatomic fluid, where we expect a classical treatment of many-body collisions to be relevant because of the high densities (2 to 3 times compressed compared to the normal fluid) and high temperatures (2000 to 4000 K) involved behind detonation waves. NEMD techniques are discussed, including their limitations, and qualitative results presented.

  18. 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)

    2011-08-16

    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.

  19. 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)

    2008-05-27

    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.

  20. 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)

    2007-05-22

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

    2012-08-14

    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. Resonant Inelastic Scattering Spectra of Free Molecules with Vibrational Resolution

    SciTech Connect (OSTI)

    Hennies, Franz; Pietzsch, Annette; Berglund, Martin; Foehlisch, Alexander; Schmitt, Thorsten; Strocov, Vladimir; Karlsson, Hans O.; Andersson, Joakim; Rubensson, Jan-Erik

    2010-05-14

    Inelastic x-ray scattering spectra excited at the 1s{sup -1{pi}}* resonance of gas phase O{sub 2} have been recorded with an overall energy resolution that allows for well-resolved vibrational progressions. The nuclear wave packet dynamics in the intermediate state is reflected in vibrational excitations of the electronic ground state, and by fine-tuning the excitation energy the dissociation dynamics in the predissociative B{sup '} {sup 3{Pi}}{sub g} final state is controlled.

  3. Vibration Combined High Temperature Cycle Tests for Capacitive MEMS Accelerometers

    E-Print Network [OSTI]

    Z. Szucs; G. Nagy; S. Hodossy; M. Rencz; A. Poppe

    2008-01-07

    In this paper vibration combined high temperature cycle tests for packaged capacitive SOI-MEMS accelerometers are presented. The aim of these tests is to provide useful Design for Reliability information for MEMS designers. A high temperature test chamber and a chopper-stabilized read-out circuitry were designed and realized at BME - DED. Twenty thermal cycles of combined Temperature Cycle Test and Fatigue Vibration Test has been carried out on 5 samples. Statistical evaluation of the test results showed that degradation has started in 3 out of the 5 samples.

  4. Bottlenecks to vibrational energy flow in OCS: Structures and mechanisms

    E-Print Network [OSTI]

    R. Paškauskas; C. Chandre; T. Uzer

    2008-11-27

    Finding the causes for the nonstatistical vibrational energy relaxation in the planar carbonyl sulfide (OCS) molecule is a longstanding problem in chemical physics: Not only is the relaxation incomplete long past the predicted statistical relaxation time, but it also consists of a sequence of abrupt transitions between long-lived regions of localized energy modes. We report on the phase space bottlenecks responsible for this slow and uneven vibrational energy flow in this Hamiltonian system with three degrees of freedom. They belong to a particular class of two-dimensional invariant tori which are organized around elliptic periodic orbits. We relate the trapping and transition mechanisms with the linear stability of these structures.

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

    E-Print Network [OSTI]

    Gerhard, Katherine Leigh

    2013-01-01

    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 ...

  6. Theory and Techniques for Vibration-Induced Conductivity Fluctuation testing of Soils

    E-Print Network [OSTI]

    Hung-Chih Chang; Laszlo B. Kish; Andrea Kishne; Cristine Morgan; Chiman Kwan

    2009-01-22

    First we present and theoretically analyze the phenomenological physical picture behind Vibration-Induced Conductivity Fluctuations. We identify the relevant tensors characterizing the electromechanical response against the vibrations for both longitudinal and transversal responses. We analyze the conductivity response with acceleration type vibrations and a new scheme, measurements with more advantageous compression type vibrations that are first introduced here. Compression vibrations provide sideband spectral lines shifted by the frequency of the vibration instead of its second harmonics; moreover the application of this method is less problematic with loose electrodes. Concerning geometry and electrodes, the large measurement errors in earlier experiment indicated electrode effects which justify using four-electrode type measurements. We propose and analyze new arrangements for the longitudinal and transversal measurements with both compression vibration and acceleration vibration for laboratory and field conditions.

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

    Office of Scientific and Technical Information (OSTI)

    Vibration on Fretting in Shell and Tube Heat Exchangers," Flow- Induced Vibration of Power Plant Components PVP-41, pp. 1-18, 1980, Table 1. Permission granted by the American...

  8. 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 ...

  9. Time-Resolved Resonance Raman Spectroscopy of Vibrational Populations Monitored after Electronic and Infrared Excitation

    SciTech Connect (OSTI)

    Werncke, W.; Kozich, V.; Dreyer, J. [Max-Born-Institut, Max-Born-Strasse 2A, D-12489 Berlin (Germany)

    2008-11-14

    Pathways of vibrational energy flow in molecules with an intramolecular hydrogen bond are studied after intramolecular proton transfer reactions as well as after infrared excitation of the O-H stretching vibration which is coupled to this hydrogen bond.

  10. 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 ...

  11. Design and optimization of a bi-axial vibration-driven electromagnetic...

    Office of Scientific and Technical Information (OSTI)

    Design and optimization of a bi-axial vibration-driven electromagnetic generator Citation Details In-Document Search Title: Design and optimization of a bi-axial vibration-driven...

  12. NEUROMOTOR RESPONSE TO WHOLE BODY VIBRATION TRANSMISSIBILITY IN THE HORIZONTAL DIRECTION AND ITS MATHEMATICAL MODEL

    E-Print Network [OSTI]

    Hanumanthareddygari, Vinay

    2010-09-02

    and head. However, no model to our knowledge has examined the transmission of mechanical vibration to muscle shortening/lengthening, the neuromotor system and reflex muscle activation. In addition, only a few studies have examined biodynamic vibration...

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

    E-Print Network [OSTI]

    Kim, Young Ha

    2012-02-14

    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...

  14. TotalView Training 2015

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired Solar FuelTechnologyTel:FebruaryEIA's Today8Topo II: AnUsersTotalView

  15. ISSN 2167-5163 View Publications

    E-Print Network [OSTI]

    Waldschmidt, Michel

    ISSN 2167-5163 View Publications View Author/Related Publications View Reviews Refine Search Co: 180085 Earliest Indexed Publication: 1970 Total Publications: 176 Total Author/Related Publications: 189 Chen Publications (by number in area) Associative rings and algebras Dynamical systems and ergodic

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

    E-Print Network [OSTI]

    Lackner, Matthew, 1980-

    2004-01-01

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

  17. Micro-scale piezoelectric vibration energy harvesting: from fixed-frequency to adaptable-frequency devices

    E-Print Network [OSTI]

    Miller, Lindsay Margaret

    2012-01-01

    vibrations. Journal of Microelectromechanical Systems, 17(capability. Journal of Microelectromechanical Systems, 18(Journal of Microelectromechanical Systems, BIBLIOGRAPHY [47

  18. INTERMODAL RESONANCE OF IN-PLANE FREE VIBRATIONS OF SUSPENDED CABLES

    E-Print Network [OSTI]

    Rienstra, Sjoerd W.

    . It is known from observations that even a small wind force is sufficient to maintain a gallop- ing vibration

  19. ExperimentalVerification of Vibration Absorbers Combinedwith Input Shaping for Oscillatory Systems

    E-Print Network [OSTI]

    Singhose, William

    ExperimentalVerification of Vibration Absorbers Combinedwith Input Shaping for Oscillatory Systems of Technology Atlanta, GA 30332 ABSTRACT Systems that exhibit flexible dynamics are susceptible to vibration choice to deal with these vibrations, but in many cases, it is insufficient or difficult to implement

  20. Fabrication and Optimal Strain Sensor Placement in an Instrumented Disk Drive Suspension for Vibration Suppression

    E-Print Network [OSTI]

    Horowitz, Roberto

    for Vibration Suppression Kenn Oldham, Stanley Kon Computer Mechanics Laboratory (CML) University of California drive suspension with vibra- tion sensing strain gages can enhance vibration suppression in hard disk bits. As the industry targets bit densities of 1 terabit per square inch, airflow induced vibration

  1. COMPUTATION OF THE VIBRATION MODES OF A REISSNER-MINDLIN LAMINATED PLATE

    E-Print Network [OSTI]

    Duran, Ricardo

    COMPUTATION OF THE VIBRATION MODES OF A REISSNER-MINDLIN LAMINATED PLATE RICARDO G. DUR´AN, RODOLFO estimates including a double or- der for the vibration frequencies are obtained under appropriate vibration problem, as well. For instance, the DL3 and the MITC elements (which 2000 Mathematics Subject

  2. Vibration Suppression: Reducced-Order ModeVResidual Mode Filter Control

    E-Print Network [OSTI]

    Vibration Suppression: Reducced-Order ModeVResidual Mode Filter Control Using Smart Structures with large flexible antennas, andor flexible support structures, suppressing vibrations caused by on on the development of improved vibration suppression techniques for flexible spacecraft structures using smart

  3. ORIGINAL PAPER Calculation of infrared and Raman vibration modes of magnesite

    E-Print Network [OSTI]

    Cattin, Rodolphe

    ORIGINAL PAPER Calculation of infrared and Raman vibration modes of magnesite at high pressure) are used to obtain infrared (IR) and Raman magnesite vibration modes as they vary with pressure up to 50 approaches of vibrations in crystals based on empirical models suffer several drawbacks lead- ing

  4. 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 are the followings: - Use an automatic tool of vibration data quality defaults detection; evaluate this tool

  5. The role of vortex wake dynamics in the flow-induced vibration of tube arrays

    E-Print Network [OSTI]

    Kevlahan, Nicholas

    The role of vortex wake dynamics in the flow-induced vibration of tube arrays N.K.-R. Kevlahan Keywords: Fluid­structure interaction Vortex-induced vibration Tube arrays Potential flow a b s t r a c in the non-resonant flow-induced vibration of periodic tube arrays. This dual approach untangles the effects

  6. A PIECEWISE LINEAR FINITE ELEMENT METHOD FOR THE BUCKLING AND THE VIBRATION PROBLEMS OF THIN

    E-Print Network [OSTI]

    Rodríguez, Rodolfo

    A PIECEWISE LINEAR FINITE ELEMENT METHOD FOR THE BUCKLING AND THE VIBRATION PROBLEMS OF THIN PLATES finite element method to approximate the buckling and the vibration problems of a thin plate. The method]). The method was applied to the plate vibration problem in [6] and [17, Section 7(b)], where it was proved

  7. AN hp FINITE ELEMENT METHOD TO SOLVE A FLUID-SOLID VIBRATION PROBLEM

    E-Print Network [OSTI]

    Rodríguez, Rodolfo

    AN hp FINITE ELEMENT METHOD TO SOLVE A FLUID-SOLID VIBRATION PROBLEM CLAUDIO PADRA, RODOLFO RODR´IGUEZ , AND MARIO SCHEBLE § Abstract. This paper deals with a two-dimensional fluid-solid vibration problem arising from nuclear engineering: the vibration of elastically mounted tubes immersed in a cavity filled

  8. Extraction of Vibration Components from a Rotating Propeller Model Based on Complex Empirical Mode Decomposition

    E-Print Network [OSTI]

    Myung, Noh-Hoon

    Extraction of Vibration Components from a Rotating Propeller Model Based on Complex Empirical Mode dydynoel@kaist.ac.kr Abstract -- In this paper, we present extraction of vibration components embedded decomposition (CEMD), an extended version of EMD, is employed to extract the vibration components. With FEKO

  9. Acoustics of the mountain pine beetle (Dendroctonus ponderosae) (Curculionidae, Scolytinae): sonic, ultrasonic, and vibration

    E-Print Network [OSTI]

    Yack, Jayne E.

    ): sonic, ultrasonic, and vibration characteristics A.J. Fleming, A.A. Lindeman, A.L. Carroll, and J­male (rivalry) chirps are predominantly simple, with evidence of antiphonal calling. Substrate-borne vibrations organs could be tuned to either air or substrate-borne vibrations. These results have important

  10. Vibration-rotation coupling in a Morse oscillator C. E. Burkhardta

    E-Print Network [OSTI]

    Leventhal, Jacob J.

    Vibration-rotation coupling in a Morse oscillator C. E. Burkhardta Department of Physics, St. Louis 2007; accepted 25 May 2007 The Morse function is invaluable for describing the vibrational motion for this potential only if molecular rotation is ignored or if the rotation is isolated from the vibrational motion

  11. The Development of a Nonlinear Elastomeric Adaptive Tuned Vibration Steven Paul Miller

    E-Print Network [OSTI]

    von Lockette, Paris

    The Development of a Nonlinear Elastomeric Adaptive Tuned Vibration Absorber Steven Paul Miller;The Development of a Nonlinear Elastomeric Adaptive Tuned Vibration Absorber Prepared by-passive tuned vibration absorbers. The work is an attempt to augment the performance of traditional passive

  12. Ground vibration due to a high-speed moving harmonic rectangular load on a

    E-Print Network [OSTI]

    Avignon et des Pays de Vaucluse, Université de

    Ground vibration due to a high-speed moving harmonic rectangular load on a poroviscoelastic half'Avignon, Facult´e des Sciences, 33 rue Louis Pasteur, F-84000 Avignon, France RUNNING TITLE: Vibrations induced) #12;Abstract The transmission of vibrations in the ground, due to a high-speed moving vertical har

  13. Identification of Rational Functions using two-degree-of-freedom model by forced vibration method

    E-Print Network [OSTI]

    McCalley, James D.

    Identification of Rational Functions using two-degree-of-freedom model by forced vibration method Functions Self-excited forces Two-degree-of-freedom model Forced vibration method Streamlined section model the Rational Functions from wind tunnel section model tests in free vibration. To overcome the limitations

  14. Experimental Study of Active Vibration Suppression Structure Using Modular Control Patch*

    E-Print Network [OSTI]

    Experimental Study of Active Vibration Suppression Structure Using Modular Control Patch* Gangbing results of vibration suppressicln of a flexible structure using a miniaturized digital controller, called for the United States Air Force for future space vibration control. In this research, the MCP is used

  15. SVMs for Vibration-based Terrain Classification Christian Weiss, Matthias Stark, and Andreas Zell

    E-Print Network [OSTI]

    Zell, Andreas

    SVMs for Vibration-based Terrain Classification Christian Weiss, Matthias Stark, and Andreas Zell mobile robot traverses different types of ground surfaces, different types of vibrations are induced in the body of the robot. These vibrations can be used to learn a discrimination between different surfaces

  16. TITLE: ACTIVE VIBRATION SUPPRESSION OF SMART STRUCTURES USING PIEZOELECTRIC SHEAR ACTUATORS

    E-Print Network [OSTI]

    Vel, Senthil

    TITLE: ACTIVE VIBRATION SUPPRESSION OF SMART STRUCTURES USING PIEZOELECTRIC SHEAR ACTUATORS Authors Current active vibration suppression systems usually consist of piezoelectric extension actuators bonded of polarization to cause shear deformation of the material. We present an exact analysis and active vibration

  17. Estimating text legibility of a mobile display on the basis of translational vibration caused by walking

    E-Print Network [OSTI]

    Olkkonen, Maria

    Estimating text legibility of a mobile display on the basis of translational vibration caused by walking Maria Olkkonen Terhi Mustonen Abstract -- In this study, the effect of vibration on mobile km/hour, and an indi- vidually defined speed (3.9 km/hour on average). Vibration was measured

  18. Posterior Probability Estimation Techniques Embedded in a Bayes Filter for Vibration-based

    E-Print Network [OSTI]

    Zell, Andreas

    Posterior Probability Estimation Techniques Embedded in a Bayes Filter for Vibration-based Terrain Classification Philippe Komma and Andreas Zell Abstract Vibration signals acquired during robot traversal provide] or ladar sensors [15, 10] can be employed. Recently, several researchers considered vehicle vibrations

  19. Fluid-thermoacoustic vibration of a gas turbine recuperator tubular heat exchanger system

    SciTech Connect (OSTI)

    Eisinger, F.L. )

    1994-07-01

    Low-frequency acoustic vibration of a vertical gas turbine recuperator during cold start-up is described. The vibration was identified as fluid-thermoacoustic instability driven by a modified Sondhauss tube-like thermoacoustic phenomenon. The problem and its underlying theoretical basis are described. A design guideline for prevention of instability and alternative solutions for the elimination of the vibration are given.

  20. The Effects of Coulomb Friction on the Performance of Centrifugal Pendulum Vibration

    E-Print Network [OSTI]

    Feeny, Brian

    The Effects of Coulomb Friction on the Performance of Centrifugal Pendulum Vibration Absorbers on the performance of centrifugal pen- dulum vibration absorbers (CPVAs), which are used to re- duce torsional suspensions. 1 Introduction Centrifugal pendulum vibration absorbers (CPVAs) have been shown to significantly

  1. Acoustic Emission, Cylinder Pressure and Vibration: A Multisensor Approach to Robust Fault Diagnosis \\Lambda

    E-Print Network [OSTI]

    Sharkey, Amanda

    Acoustic Emission, Cylinder Pressure and Vibration: A Multisensor Approach to Robust Fault in the ensuing cylinder pressure traces, acoustic emission and vibration signals. In this paper, we explore the idea of exploiting information detected by pressure, vibration and acoustic emission sensors in order

  2. 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)

  3. Sponsored by Department of Mechanical Engineering The Role of Noise and Vibration

    E-Print Network [OSTI]

    Fisher, Frank

    Sponsored by Department of Mechanical Engineering The Role of Noise and Vibration Control in the design process by: Patrick Marks, PE Johnson Control, York, PA ABSTRACT: Noise and vibration control problems and customer dissatisfaction. This presentation will show the role of noise and vibration control

  4. MAE 130C / SE 101C (4 units) Mechanics III: Vibrations

    E-Print Network [OSTI]

    Fainman, Yeshaiahu

    MAE 130C / SE 101C (4 units) Mechanics III: Vibrations Class/Laboratory Schedule: four hours Textbooks/Materials: 1. S.S. Rao: Mechanical Vibrations, 4th ed., Prentice Hall, 2010 2. W.T. Thomson and M.D. Dahleh, Theory of Vibrations with Applications, 5th ed., Prentice Hall, 1997 3. L. Meirovitch

  5. Active Vibration Control of a Modular Robot Combining a Back-Propagation Neural Network with

    E-Print Network [OSTI]

    Li, Yangmin

    by joints, vibration can easily be induced in this special type of mechanical structure. Based on the modalActive Vibration Control of a Modular Robot Combining a Back-Propagation Neural Network-propagation neural network suboptimal controller is developed to control the vibration of a nine

  6. Averaged dynamics of two-phase media in a vibration field Arthur V. Straubea

    E-Print Network [OSTI]

    Straube, Arthur V.

    to astronomic scales. Vibration is a mechanical oscillatory process with an amplitude that is small compared of the system is much larger than the period of the oscillation. Vibration mechanics has been studied for a longAveraged dynamics of two-phase media in a vibration field Arthur V. Straubea Department of Physics

  7. Six DOF vibration control using magnetorheological technology Memet Unsal*a

    E-Print Network [OSTI]

    Florida, University of

    -active, vibration control, hexapod. 1. INTRODUCTION Parallel platform mechanisms have received a lot of attention to provide vibration isolation at the same time. Structures and mechanical systems should be designedSix DOF vibration control using magnetorheological technology Memet Unsal*a , Christopher

  8. Harvesting vibration energy by a triple-cantilever based triboelectric nanogenerator

    E-Print Network [OSTI]

    Wang, Zhong L.

    an effective means for harvesting ambient mechanical and vibration energy, and its performance is superiorHarvesting vibration energy by a triple-cantilever based triboelectric nanogenerator Weiqing Yang1 vibration energy, triple-cantilever, self-powered systems ABSTRACT Triboelectric nanogenerators (TENG

  9. In: Mechanical Vibrations: Measurement, Effects and Control Editor: Robert C. Sapri, pp. 1-29

    E-Print Network [OSTI]

    Ray, Asok

    In: Mechanical Vibrations: Measurement, Effects and Control Editor: Robert C. Sapri, pp. 1-29 ISBN UNCERTAINTIES IN MECHANICAL VIBRATION SYSTEMS: A SYMBOLIC DYNAMICS APPROACH Shalabh Gupta, Dheeraj Singh to mechanical vibration. A possible consequence is performance degra- dation and structural damage that may

  10. Nonlinear dynamics of shape memory alloy oscillators in tuning structural vibration frequencies

    E-Print Network [OSTI]

    Melnik, Roderick

    demonstrate that due to the thermo-mechanical coupling, the vibration characteristics of the supplementaryNonlinear dynamics of shape memory alloy oscillators in tuning structural vibration frequencies 2010 Accepted 8 September 2012 Available online 18 October 2012 Keywords: Vibration tuning Frequency

  11. Author's personal copy Journal of Sound and Vibration 311 (2008) 608622

    E-Print Network [OSTI]

    Ray, Asok

    2008-01-01

    with the associated reduction of noise, vibration, and local temperature rise. It also decreases wear of mechanicalAuthor's personal copy JOURNAL OF SOUND AND VIBRATION Journal of Sound and Vibration 311 (2008) 608­622 Anomaly detection in flexible mechanical couplings via symbolic time series analysis Amol Khatkhatea

  12. 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

  13. 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

  14. Engineering & the Environment

    E-Print Network [OSTI]

    Molinari, Marc

    Engineering & the Environment Energy MSc Programmes MSc Energy & Sustainability (Including Energy, Resources and Climate Change; Energy, Environment and Buildings) MSc Sustainable Energy Technologies (SET of aeronautics & astronautics, mechanical engineering, ship science; audiology and acoustics; and civil

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

    SciTech Connect (OSTI)

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

    1993-12-01

    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.

  16. Vibration damping and heat transfer using material phase changes

    DOE Patents [OSTI]

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

    2009-03-24

    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.

  17. Electronic energy transfer: vibrational control and nonlinear wavepacket interferometry

    E-Print Network [OSTI]

    Dmitri S. Kilin; Jeffrey A. Cina; Oleg V. Prezhdo

    2004-12-31

    The time-development of photoexcitations in molecular aggregates exhibits specific dynamics of electronic states and vibrational wavefunction. We discuss the dynamical formation of entanglement between electronic and vibrational degrees of freedom in molecular aggregates with theory of electronic energy transfer and the method of vibronic 2D wavepackets [Cina, Kilin, Humble, J. Chem. Phys. 118, 46 (2003)]. The vibronic dynamics is also described by applying Jaynes-Cummings model to the electronic energy transfer [Kilin, Pereverzev, Prezhdo, J. Chem. Phys. 120, 11209 (2004);math-ph/0403023]. Following the ultrafast excitation of donor[chem-ph/9411004] the population of acceptor rises by small portions per each vibrational period, oscillates force and back between donor and acceptor with later damping and partial revivals of this oscillation. The transfer rate gets larger as donor wavepacket approaches the acceptor equilibrium configuration, which is possible at specific energy differences of donor and acceptor and at maximal amount of the vibrational motion along the line that links donor and acceptor equilibria positions. The four-pulse phase-locked nonlinear wavepacket 2D interferograms reflect the shape of the relevant 2D vibronic wavepackets and have maxima at longer delay between excitation pulses for dimers with equal donor-acceptor energy difference compare to dimers with activationless energy configuration [Cina, Fleming, J. Phys. Chem. A. 108, 11196 (2004)].

  18. Percussion synthesis based on models of nonlinear shell vibration 

    E-Print Network [OSTI]

    Bilbao, Stefan

    resonating component of a musical instrument is linear. Perceptually, the effects of the vibration of a thin structure at high amplitudes can be heard as crashes, pitch glides, and the slow buildup of high-frequency energy characteristic of gongs. A large...

  19. Active Automobile Engine Vibration Analysis Technical Report Number 1

    E-Print Network [OSTI]

    Levi, Anthony F. J.

    of their vehicles in order to reduce repair costs and atmospheric pollution and increase efficiency and longevity of the operating condition of their vehicles. It is also clear that the international community is becoming more insight into the modes of vibration from the engine block to the chassis of the vehicle. #12;Active

  20. Resetting Virtual Absorbers for Vibration Control ROBERT T. BUPP

    E-Print Network [OSTI]

    Bernstein, Dennis S.

    of sensors and actuators as well as processors and power supplies. One advantage of virtual absorbers Journal the absorber into the plant. This behavior is also exhibited by a plant with an attached virtual absorberResetting Virtual Absorbers for Vibration Control ROBERT T. BUPP TRW S & EG Redondo Beach, CA 90278

  1. Vincent Thomas Bridge Vibration Debasis Karmakar, Ho Lee

    E-Print Network [OSTI]

    Shinozuka, Masanobu

    detailed model First mode of the detailed model has pretty good match with the system ID results EvaluationVincent Thomas Bridge Vibration Debasis Karmakar, Ho Lee Faculty Advisor: Prof. Masanobu Shinozuka: Caltrans Structural Modifications Damper First mode is little bit stiffer in case of simple model than

  2. Smart Structures and Their Applications on Active Vibration Control

    E-Print Network [OSTI]

    Yaman, Yavuz

    , the actuators used in the smart materials technologies include applications of piezoelectric ceramics124 Smart Structures and Their Applications on Active Vibration Control: Studies in the Department in piezoelectric materials have motivated many researchers to work in the field of smart structures. A smart

  3. Active Vibration Suppression of a Smart Beam Cem ONAT+,*

    E-Print Network [OSTI]

    Yaman, Yavuz

    -bonded piezoelectric patches. In this particular application, a group of PZT patches closed to the root of the beam on piezoelectric materials have successfully paved ways for active vibration control applications by means of using aforementioned group of sensor/actuator piezoelectric patches. The PI Dµ controller

  4. Vibrationally inelastic H D2 collisions are forward-scattered

    E-Print Network [OSTI]

    Zare, Richard N.

    . Dozens of studies over the past few decades have compared measurements of integral and differential cross, MA, and approved October 14, 2008 (received for review August 11, 2008) We have measured differential quasiclassical trajectory (QCT) calculations examining only the o-D2(v 3, j ) products suggest that vibrationally

  5. PAYLOAD POINTING AND ACTIVE VIBRATION ISOLATION USING HEXAPOD PLATFORMS

    E-Print Network [OSTI]

    PAYLOAD POINTING AND ACTIVE VIBRATION ISOLATION USING HEXAPOD PLATFORMS Hong-Jen Chen* , Ronald M isolation techniques on hexapods at the Spacecraft Research and Design Center (SRDC) of Naval Postgraduate School (NPS). The center has two hexapod platforms: Ultra Quiet Platform (UQP) and Precision Pointing

  6. ROBUST RESIDUAL VIBRATION SUPPRESSION USING IIR DIGITAL FILTERS

    E-Print Network [OSTI]

    Mavroidis, Constantinos

    ROBUST RESIDUAL VIBRATION SUPPRESSION USING IIR DIGITAL FILTERS D. Economou a , C. Mavroidis b and I. Antoniadis a a National Technical University of Athens Department of Mechanical Engineering, 9 Rutgers University, The State University of New Jersey, Department of Mechanical and Aerospace Engineering

  7. Multidimensional femtosecond spectroscopies of vibrational motions in liquids: Semiclassical expansion

    E-Print Network [OSTI]

    Mukamel, Shaul

    for nuclear wave packets, even when the system itself may be highly nonclassical. Two sources and vibrational anharmonicities--are identified. Formal analogy between the present equations and the time in nuclear magnetic resonance spectroscopy4 to provide invaluable information on the struc- ture and dynamics

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

    SciTech Connect (OSTI)

    Peng, S.S.

    2007-07-01

    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.

  9. Computing environment logbook

    DOE Patents [OSTI]

    Osbourn, Gordon C; Bouchard, Ann M

    2012-09-18

    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.

  10. Environment and Climate Change

    E-Print Network [OSTI]

    Galles, David

    Migration, Environment and Climate Change: ASSESSING THE EVIDENCE #12;The opinions expressed;Migration, Environment and Climate Change: ASSESSING THE EVIDENCE Edited by Frank Laczko and Christine with with the financial support of #12;3 Migration, Environment and Climate Change: Assessing the Evidence Contents

  11. 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...

  12. Dorsal Neck Muscle Vibration Induces Upward Shifts in the Endpoints of Memory-Guided Saccades in Monkeys

    E-Print Network [OSTI]

    Corneil, Brian D.

    of mechanical vibration of dorsal neck muscles in head-restrained monkeys performing memory- guided saccades the delay on one-half of all trials, mechanical vibration (usually 1,500 ms in duration, 200 m in amplitude spindles to kinesthesia is to mechanically vibrate muscle bel- lies or tendons. Provided the vibration

  13. 84 IEEE/ASME TRANSACTIONS ON MECHATRONICS, VOL. 11, NO. 1, FEBRUARY 2006 Inertial Vibration Control Using

    E-Print Network [OSTI]

    Fleming, Andrew J.

    , are commonly used for mechanical vibration control [1], [2]. Passive tuned mass absorbers utilize an inertial84 IEEE/ASME TRANSACTIONS ON MECHATRONICS, VOL. 11, NO. 1, FEBRUARY 2006 Inertial Vibration Control to reduce the vibration experienced by a host structure. Active vibration control systems typically include

  14. High Performance Builder Spotlight: Clifton View Homes

    SciTech Connect (OSTI)

    2011-01-01

    Clifton View Homes’s remodel of a 1962 rambler, on Whidbey Island in Washington State, cut energy costs by two-thirds.

  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. 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

  17. Carver User Environment

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

    Getting Started Configuration User Environment Programming Running Jobs File Storage Software and Tools Performance and Optimization Retirement Plans PDSF Genepool Testbeds...

  18. Algebraic-matrix calculation of vibrational levels of triatomic molecules

    E-Print Network [OSTI]

    Sedivcova-Uhlikova, T; Manini, Nicola

    2009-01-01

    We introduce an accurate and efficient algebraic technique for the computation of the vibrational spectra of triatomic molecules, of both linear and bent equilibrium geometry. The full three-dimensional potential energy surface (PES), which can be based on entirely {\\it ab initio} data, is parameterized as a product Morse-cosine expansion, expressed in bond-angle internal coordinates, and includes explicit interactions among the local modes. We describe the stretching degrees of freedom in the framework of a Morse-type expansion on a suitable algebraic basis, which provides exact analytical expressions for the elements of a sparse Hamiltonian matrix. Likewise, we use a cosine power expansion on a spherical harmonics basis for the bending degree of freedom. The resulting matrix representation in the product space is very sparse and vibrational levels and eigenfunctions can be obtained by efficient diagonalization techniques. We apply this method to carbonyl sulfide OCS, hydrogen cyanide HCN, water H$_2$O, and ...

  19. Gravity wave turbulence revealed by horizontal vibrations of the container

    E-Print Network [OSTI]

    Bruno Issenmann; Eric Falcon

    2012-12-20

    We experimentally study the role of the forcing on gravity-capillary wave turbulence. Previous laboratory experiments using spatially localized forcing (vibrating blades) have shown that the frequency power-law exponent of the gravity wave spectrum depends on the forcing parameters. By horizontally vibrating the whole container, we observe a spectrum exponent that does not depend on the forcing parameters for both gravity and capillary regimes. This spatially extended forcing leads to a gravity spectrum exponent in better agreement with the theory than by using a spatially localized forcing. The role of the vessel shape has been also studied. Finally, the wave spectrum is found to scale linearly with the injected power for both regimes whatever the forcing type used.

  20. Tunable transport of drops on a vibrating inclined fiber

    E-Print Network [OSTI]

    Bick, Alison; Sauret, Alban; Stone, Howard A

    2015-01-01

    Transport of liquid drops in fibrous media occurs in various engineering systems such as fog harvesting or cleaning of textiles. The ability to tune or to control liquid movement can increase the system efficiency and enable new engineering applications. In this Letter, we experimentally investigate how partially wetting drops on a single fiber can be manipulated by vibrating the fiber. We show that a sliding motion along the fiber or a dripping of the drop can be triggered by standing waves. We identify the conditions on the drop volume, the fiber tilt angle and the amplitude and frequency of oscillations to observe these different behaviors. Finally, we experimentally illustrate that vibrations can be used to control the transport and the collection of water drops along a fiber using a combination of the sliding and dripping transitions.

  1. Nonlinear behavior of vibrating molecules on suspended graphene waveguides

    E-Print Network [OSTI]

    Banerjee, Amrita

    2015-01-01

    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).

  2. Computational study of the vibrating disturbances to the lung function

    E-Print Network [OSTI]

    Kholodov, A S; Nadolsky, A A; Shushlebin, A N

    2007-01-01

    Frequently during its lifetime a human organism is subjected to the acoustical and similar to them vibrating impacts. Under the certain conditions such influence may cause physiological changes in the organs functioning. Thus the study of the oscillatory mechanical impacts to the organism is very important task of the numerical physiology. It allows to investigate the endurance limits of the organism and to develop protective measures in order to extend them. The noise nuisances affects to the most parts of the organism disrupting their functions. The vibrating disturbances caused to the lung function as one of the most sensitive to the acoustical impacts is considered in this work. The model proposed to describe the air motion in trachea-bronchial tree is based on the one dimensional no-linear theory including mass and momentum conservation for the air flow in flexible tubes.

  3. Energy harvesting using vortex-induced vibrations of tensioned cables

    E-Print Network [OSTI]

    Grouthier, Clement; de Langre, Emmanuel

    2012-01-01

    The development of energy harvesting systems based on fluid/structure interactions is part of the global search for innovative tools to produce renewable energy. In this paper, the possibility to harvest energy from a flow using vortex-induced vibrations (VIV) of a tensioned flexible cable is analyzed. The fluid loading on the vibrating solid and resulting dynamics are computed using an appropriate wake-oscillator model, allowing one to perform a systematic parametric study of the efficiency. The generic case of an elastically-mounted rigid cylinder is first investigated, before considering an infinite cable with two different types of energy harvesting : a uniformly spanwise distributed harvesting and then a periodic distribution of discrete harvesting devices. The maximum harvesting efficiency is of the same order for each configuration and is always reached when the solid body and its wake are in a frequency lock-in state.

  4. Growing timescales and lengthscales characterizing vibrations of amorphous solids

    E-Print Network [OSTI]

    Ludovic Berthier; Patrick Charbonneau; Yuliang Jin; Giorgio Parisi; Beatriz Seoane; Francesco Zamponi

    2015-11-13

    Low-temperature properties of crystalline solids can be understood using harmonic perturbations around a perfect lattice, as in Debye's theory. Low-temperature properties of amorphous solids, however, strongly depart from such descriptions, displaying enhanced transport, activated slow dynamics across energy barriers, excess vibrational modes with respect to Debye's theory (i.e., a Boson Peak), and complex irreversible responses to small mechanical deformations. These experimental observations indirectly suggest that the dynamics of amorphous solids becomes anomalous at low temperatures. Here, we provide direct numerical evidence that vibrations change nature at a well-defined location deep inside the glass phase of a simple glass former. We provide a real-space description of this transition and of the rapidly growing time and length scales that accompany it. We discuss our results both in the theoretical context of the recently discovered Gardner phase transition and in connection with low-temperature glass experiments.

  5. Classical LQG's limitation and modification in stochastic vibration system

    E-Print Network [OSTI]

    Yinmiao Luo

    2011-11-07

    The function of control force is deduced by stochastic averaging method in shochastic vibration system.It is found that classical LQG is not full optimization because control force from displacement is of no effect to depress stochastic response.A modified vLQG control strategy is proposed . Numerical result shows that vLQG has better control effectiveness comparing with classical LQG control strategy.

  6. From chiral vibration to static chirality in ^{135}Nd

    E-Print Network [OSTI]

    S. Mukhopadhyay; D. Almehed; U. Garg; S. Frauendorf; T. Li; P. V. Madhusudhana Rao; X. Wang; S. S. Ghugre; M. P. Carpenter; S. Gros; A. Hecht; R. V. F. Janssens; F. G. Kondev; T. Lauritsen; D. Seweryniak; S. Zhu

    2007-09-14

    Electromagnetic transition probabilities have been measured for the intra- and inter-band transitions in the two sequences in the nucleus ^{135}Nd that were previously identified as a composite chiral pair of rotational bands. The measurements are in good agreement with results of a new combination of TAC and RPA calculations. The chiral character of the bands is affirmed and it is shown that their behavior is associated with a transition from a vibrational into a static chiral regime.

  7. Identification of dynamic properties from ambient vibration measurements

    SciTech Connect (OSTI)

    Farrar, C.R. [Los Alamos National Lab., NM (United States); James, G.H. III [Sandia National Labs., Albuquerque, NM (United States)

    1995-09-01

    To better understand the dynamic behavior of structures under normal dynamic loads as well as extreme loads such as those caused by seismic events or high winds, it is desirable to measure the dynamic properties (resonant frequencies, mode shapes and modal damping) of these structures. The cross-correlation function between two response measurements made on an ambiently excited structure is shown to have the same form as the system`s impulse response function. Therefore, standard time-domain curve-fitting procedures such as the complex exponential method, which are typically applied to impulse response functions, can now be applied to the cross-correlation functions to estimate the resonant frequencies and modal damping of the structure. A direct comparison of resonant frequencies identified by curve-fitting the cross-correlation functions, using traffic excitation as the ambient vibration source, and modal properties identified by standard forced vibration testing of a highway bridge, after traffic was removed, showed a maximum discrepancy of 3.63%. Similar comparisons for the average modal damping values identified by the two methods showed a 9.82% difference. This experimental verification implies that the proposed method of analyzing ambient vibration data has the potential to accurately assess the dynamic properties of large structures subjected to seismic excitations and small structures that are tested on a shake table.

  8. The Thermodynamics of a Single Bead in a Vibrating Container

    E-Print Network [OSTI]

    P. Evesque

    2005-06-24

    Statistics of the 1d dynamics of a single particle in a box of length L is studied under different conditions of periodic excitation: vibrated container, or 1 wall moving periodically or two walls vibrating in opposite phases. Theoretical predictions for the mean typical speed are derived using some Random Phase Approximation (RPA) for small b/L ratio, as functions of the amplitude b and frequency f of vibration and of the collision restitution coefficient r=vout/vin. They are compared to numerical simulations. It is concluded that RPA is valid for b/L>0.005, that long time memory, i.e. non ergodicity, and/or resonance develop at large restitution coefficient r (r>0.95) and/or at large b/L, that scales always as f, and scales as b except for large b/L values, i.e. b/L>0.02, and that the relative velocity =[/(bf)] is about 1 when r<0.4-0.5 . Relative standard deviation DV/V is found to be approximately constant, i.e. DV/V is about 0.3 except when resonance occurs; in this case, memory effect and non ergodicity effects are observed and become too important . Pacs # : 5.40 ; 45.70 ; 64 ; 83.70.Fn

  9. Experimental Analysis of a Piezoelectric Energy Harvesting System for Harmonic, Random, and Sine on Random Vibration

    SciTech Connect (OSTI)

    Cryns, Jackson W.; Hatchell, Brian K.; Santiago-Rojas, Emiliano; Silvers, Kurt L.

    2013-07-01

    Formal journal article Experimental analysis of a piezoelectric energy harvesting system for harmonic, random, and sine on random vibration Abstract: Harvesting power with a piezoelectric vibration powered generator using a full-wave rectifier conditioning circuit is experimentally compared for varying sinusoidal, random and sine on random (SOR) input vibration scenarios. Additionally, the implications of source vibration characteristics on harvester design are discussed. Studies in vibration harvesting have yielded numerous alternatives for harvesting electrical energy from vibrations but piezoceramics arose as the most compact, energy dense means of energy transduction. The rise in popularity of harvesting energy from ambient vibrations has made piezoelectric generators commercially available. Much of the available literature focuses on maximizing harvested power through nonlinear processing circuits that require accurate knowledge of generator internal mechanical and electrical characteristics and idealization of the input vibration source, which cannot be assumed in general application. In this manuscript, variations in source vibration and load resistance are explored for a commercially available piezoelectric generator. We characterize the source vibration by its acceleration response for repeatability and transcription to general application. The results agree with numerical and theoretical predictions for in previous literature that load optimal resistance varies with transducer natural frequency and source type, and the findings demonstrate that significant gains are seen with lower tuned transducer natural frequencies for similar source amplitudes. Going beyond idealized steady state sinusoidal and simplified random vibration input, SOR testing allows for more accurate representation of real world ambient vibration. It is shown that characteristic interactions from more complex vibrational sources significantly alter power generation and power processing requirements by increasing harvested power, shifting optimal conditioning impedance, inducing significant voltage supply fluctuations and ultimately rendering idealized sinusoidal and random analyses insufficient.

  10. Toto the Robot Figure 1. Toto, front view. Figure 2. Toto, rear view.

    E-Print Network [OSTI]

    Indiana University

    Toto the Robot Figure 1. Toto, front view. Figure 2. Toto, rear view. Toto the Robot was created so a robot, helps account for his lack of verbal charm. Second, some younger children may recognize in Toto

  11. Geothermal/Environment | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History View New Pages Recent ChangesInformation energyGeothermal/Environment

  12. 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

  13. MyRED Mobile Student Views

    E-Print Network [OSTI]

    Tsymbal, Evgeny Y.

    tap on Shopping Cart, then select term. Tap on Class Search to find courses to place in your shoppingMyRED Mobile 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 Screen Tap

  14. Engineering & the Environment

    E-Print Network [OSTI]

    Molinari, Marc

    (A&C) MSc Race car Aerodynamics (RCA) MSc Space Systems Engineering (SSE) MSc Unmanned VehicleEngineering & the Environment Aerospace Engineering MSc Programmes MSc Aerodynamics & Computation to the Faculty of Engineering & the Environment. We hope that you will find your stay here in Southampton both

  15. 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

  16. 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

  17. Radiation effects in the environment

    SciTech Connect (OSTI)

    Begay, F.; Rosen, L.; Petersen, D.F.; Mason, C.; Travis, B.; Yazzie, A.; Isaac, M.C.P.; Seaborg, G.T.; Leavitt, C.P.

    1999-04-01

    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.

  18. Visual Orientation and Motion Control of MAKRO Adaptation to the Sewer Environment

    E-Print Network [OSTI]

    Kolesnik, Marina

    Visual Orientation and Motion Control of MAKRO ­ Adaptation to the Sewer Environment Marina control of MAKRO - an autonomous robot for sewer inspection - from the point of view of MAKRO's adaptation to specific features of the sewer environment. Two features are crucial for MAKRO's adaptation. First, narrow

  19. Flight Measurements of the Aero-Optical Environment Around a Flat-Windowed Turret

    E-Print Network [OSTI]

    Gordeyev, Stanislav

    Flight Measurements of the Aero-Optical Environment Around a Flat-Windowed Turret Chris Porter.2514/1.J052067 This paper discusses the aero-optical environment for a flat-window hemisphere-on-cylinder turret over a wide range of viewing angles during flight tests in the Airborne Aero-Optics Laboratory

  20. Fused Data-Centric Visualizations for Software Evolution Environments Jens H. Jahnke, Hausi A. Muller,

    E-Print Network [OSTI]

    Walenstein, Andrew

    Fused Data-Centric Visualizations for Software Evolution Environments Jens H. Jahnke, Hausi A. M. Multiple facet hierarchy relations 1 #12;PREPRINT -- accepted to IWPC '2002 Fused Data-Centric Visualizations for Software Evolution Environments lem context is our efforts to add new data-centric views

  1. Fused DataCentric Visualizations for Software Evolution Environments Jens H. Jahnke, Hausi A. Muller,

    E-Print Network [OSTI]

    Walenstein, Andrew

    Fused Data­Centric Visualizations for Software Evolution Environments Jens H. Jahnke, Hausi A. M. Multiple facet hierarchy relations 1 #12; PREPRINT --- accepted to IWPC '2002 Fused Data­Centric Visualizations for Software Evolution Environments lem context is our efforts to add new data­centric views

  2. Generic Library Extension in a Heterogeneous Environment Cosmin Oancea Stephen M. Watt

    E-Print Network [OSTI]

    Watt, Stephen M.

    Generic Library Extension in a Heterogeneous Environment Cosmin Oancea Stephen M. Watt Department,watt}@csd.uwo.ca Abstract We examine what is necessary to allow generic libraries to be used naturally in a heterogeneous environment. Our approach is to treat a library as a software component and to view the problem as one

  3. 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.

    2008-12-01

    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.

  4. Complete WKB asymptotics of high frequency vibrations in a stiff problem

    E-Print Network [OSTI]

    N. Babych; Yu. Golovaty

    2008-10-01

    Asymptotic behaviour of eigenvalues and eigenfunctions of a stiff problem is described in the case of the fourth-order ordinary differential operator. Considering the stiffness coefficient that depends on a small parameter epsilon and vanishes as epsilon tends to zero on a subinterval, we prove the existence of low and high frequency resonance vibrations. The low frequency vibrations admit the power series expansions on epsilon but this method is not applicable to the description of high frequency vibrations. However, the nonclassical asymptotics on epsilon of the high frequency vibrations were constructed using the WKB method.

  5. Micro-scale piezoelectric vibration energy harvesting: from fixed-frequency to adaptable-frequency devices

    E-Print Network [OSTI]

    Miller, Lindsay Margaret

    2012-01-01

    36] Eli Leland. A MEMS sensor for AC electric current. PhDof mems piezoelectric vibration harvesters. Sensors anda mems generator and a power management circuit. Sensors and

  6. PCs in Business Environment

    E-Print Network [OSTI]

    Colak, Mijo Todor

    1994-07-29

    "PCs in Business Environment" is a project that contains two parts. First part is a real life application developed for Nordic Meat Inc. a small food - manufacturer in the KC area, developed in MS Excel 5.0 spreadsheet ...

  7. Polymers in disordered environments

    E-Print Network [OSTI]

    V. Blavatska; N. Fricke; W. Janke

    2014-11-18

    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 $\

  8. Environment | 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 Data Center Home Page on Delicious Rank EERE: Alternative Fuels DataEnergyInformationVulnerabilitiesEnergyPlus LogoEnvironment Environment

  9. Medium-solidity Vertical Axis Wind Turbines for use in Urban Environments S. Tullis, A. Fiedler, K. McLaren, S. Ziada

    E-Print Network [OSTI]

    Tullis, Stephen

    Medium-solidity Vertical Axis Wind Turbines for use in Urban Environments S. Tullis, A. Fiedler, K Vertical axis wind turbines are currently experiencing a renewed interest in small- scale applications: vertical axis wind turbines, vibration, blade aerodynamics #12;Introduction In community wind power

  10. Rank Quantization Mountain View, CA, USA

    E-Print Network [OSTI]

    Singh, Jaswinder Pal

    Rank Quantization Ravi Kumar Google Mountain View, CA, USA ravi.k53@gmail.com Ronny Lempel Yahoo and that copies bear this notice and the full citation on the first page. To copy otherwise, to republish, to post

  11. A Utility View of Energy Conservation 

    E-Print Network [OSTI]

    Grant, S. A.

    1979-01-01

    Energy conservation, as viewed by the utility companies, is of real concern due to the energy situation and recent national energy legislation. The conversion programs of the electric utilities, particularly those in the southwestern part of the U...

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

    E-Print Network [OSTI]

    2011-01-01

    View to 2050 Laser Fusion Energy a Potential Game Changerworld leader in laser fusion energy—a potential game changera Laser Inertial Fusion Energy (LIFE) power plant would be

  13. TotalView Parallel Debugger at NERSC

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

    The performance of the GUI can be greatly improved if used in conjunction with free NX software. The TotalView documentation web page is a good resource for learning more...

  14. 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.

  15. Incorporating video into Google Mobile Street View

    E-Print Network [OSTI]

    Wright, Christina (Christina E.)

    2010-01-01

    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. ...

  16. A view-sequential 3D display

    E-Print Network [OSTI]

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

    2003-01-01

    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 ...

  17. A common-view disciplined oscillator

    SciTech Connect (OSTI)

    Lombardi, Michael A.; Dahlen, Aaron P.

    2010-05-15

    This paper describes a common-view disciplined oscillator (CVDO) that locks to a reference time scale through the use of common-view global positioning system (GPS) satellite measurements. The CVDO employs a proportional-integral-derivative controller that obtains near real-time common-view GPS measurements from the internet and provides steering corrections to a local oscillator. A CVDO can be locked to any time scale that makes real-time common-view data available and can serve as a high-accuracy, self-calibrating frequency and time standard. Measurement results are presented where a CVDO is locked to UTC(NIST), the coordinated universal time scale maintained at the National Institute of Standards and Technology in Boulder, Colorado.

  18. Damping element for reducing the vibration of an airfoil

    DOE Patents [OSTI]

    Campbell, Christian X; Marra, John J

    2013-11-12

    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.

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

    SciTech Connect (OSTI)

    Gruszkiewicz, Miroslaw {Mirek} S; Rother, Gernot; Wesolowski, David J; Cole, David R; Wallacher, Dirk

    2012-01-01

    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.

  20. KNOTS AND RANDOM WALKS IN VIBRATED GRANULAR CHAINS

    SciTech Connect (OSTI)

    E. BEN-NAIM; ET AL

    2000-08-01

    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.

  1. 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

    2015-02-28

    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.

  2. Surface Mean-Square Amplitudes of Vibration for Nacl 

    E-Print Network [OSTI]

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

    1972-01-01

    " in low-energy electron diffraction (LEED). In the present paper we report calculations of the mean-square ampli- tudes and mean-square velocities for the (100) surface of NaC1. We will distinguish the Na' and Cl ions by a la- bel w and use a label... expressions coth[If&o, (j)/2ks T] ~,(q) x coth h'tc (q) 'l B M? is the mass of an ion labeled by w, N is the number of values of the two-dimensional wave vec- tor q in the summation, P is a label which distin- guishes the different vibrational modes...

  3. Modeling nonlinear random vibration: Implication of the energy conservation law

    E-Print Network [OSTI]

    Xu Sun; Jinqiao Duan; Xiaofan Li

    2012-06-18

    Nonlinear random vibration under excitations of both Gaussian and Poisson white noises is considered. The model is based on stochastic differential equations, and the corresponding stochastic integrals are defined in such a way that the energy conservation law is satisfied. It is shown that Stratonovich integral and Di Paola-Falsone integral should be used for excitations of Gaussian and Poisson white noises, respectively, in order for the model to satisfy the underlining physical laws (e.g., energy conservation). Numerical examples are presented to illustrate the theoretical results.

  4. Molecular structure in soil humic substances: The new view

    SciTech Connect (OSTI)

    Sutton, Rebecca; Sposito, Garrison

    2005-04-21

    A critical examination of published data obtained primarily from recent nuclear magnetic resonance spectroscopy, X-ray absorption near-edge structure spectroscopy, electrospray ionization-mass spectrometry, and pyrolysis studies reveals an evolving new view of the molecular structure of soil humic substances. According to the new view, humic substances are collections of diverse, relatively low molecular mass components forming dynamic associations stabilized by hydrophobic interactions and hydrogen bonds. These associations are capable of organizing into micellar structures in suitable aqueous environments. Humic components display contrasting molecular motional behavior and may be spatially segregated on a scale of nanometers. Within this new structural context, these components comprise any molecules intimately associated with a humic substance, such that they cannot be separated effectively by chemical or physical methods. Thus biomolecules strongly bound within humic fractions are by definition humic components, a conclusion that necessarily calls into question key biogeochemical pathways traditionally thought to be required for the formation of humic substances. Further research is needed to elucidate the intermolecular interactions that link humic components into supramolecular associations and to establish the pathways by which these associations emerge from the degradation of organic litter.

  5. Particle-vibration coupling within covariant density functional theory

    E-Print Network [OSTI]

    E. Litvinova; P. Ring; V. Tselyaev

    2007-05-08

    Covariant density functional theory, which has so far been applied only within the framework of static and time dependent mean field theory is extended to include Particle-Vibration Coupling (PVC) in a consistent way. Starting from a conventional energy functional we calculate the low-lying collective vibrations in Relativistic Random Phase Approximation (RRPA) and construct an energy dependent self-energy for the Dyson equation. The resulting Bethe-Salpeter equation in the particle-hole ($ph$) channel is solved in the Time Blocking Approximation (TBA). No additional parameters are used and double counting is avoided by a proper subtraction method. The same energy functional, i.e. the same set of coupling constants, generates the Dirac-Hartree single-particle spectrum, the static part of the residual $ph$-interaction and the particle-phonon coupling vertices. Therefore a fully consistent description of nuclear excited states is developed. This method is applied for an investigation of damping phenomena in the spherical nuclei with closed shells $^{208}$Pb and $^{132}$Sn. Since the phonon coupling terms enrich the RRPA spectrum with a multitude of $ph\\otimes$phonon components a noticeable fragmentation of the giant resonances is found, which is in full agreement with experimental data and with results of the semi-phenomenological non-relativistic approach.

  6. A survey on application of representation theory to molecular vibration

    SciTech Connect (OSTI)

    Prakasa, Yohenry E-mail: ntan@math.itb.ac.id; Muchtadi-Alamsyah, Intan E-mail: ntan@math.itb.ac.id

    2014-03-24

    Representations Theory is used extensively in many of the physical sciences as every physical system has a symmetry group G. Various differential equations determine the vibration of a molecule, and the symmetry group of the molecule acts on the space of solutions of these equations. In this paper we use CH{sub 4} (methane) molecule, which has four hydrogen atoms at the corners of a regular tetrahedron, and a carbon atom at the center of the tetrahedron. The four hydrogen atoms in CH{sub 4} are permuted by the action of the symmetry group and this action fixes the carbon atom. At each of the 5 vertices, we assign three unit vectors, called the standard basis vectors in directions of the three edges which are joined to the vertex. The symmetry group G of the molecules permutes the 15 standard basis vectors, so we may regard Q{sup 15} as a GG By expressing Q{sup 15} as a direct sum of irreducible GG-modules, the problem of finding the normal modes of vibration is reduced to that of computing the eigenvectors of some small matrices.

  7. Combined passive magnetic bearing element and vibration damper

    DOE Patents [OSTI]

    Post, Richard F. (Walnut Creek, CA)

    2001-01-01

    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.

  8. Self-excited vibrations in turning: cutting moment analysis

    E-Print Network [OSTI]

    Olivier Cahuc; Jean-Yves K'Nevez; Alain Gérard; Philippe Darnis; Gaëtan Albert; Claudiu F. Bisu; Céline Gérard

    2010-07-06

    This work aims at analysing the moment effects at the tool tip point and at the central axis, in the framework of a turning process. A testing device in turning, including a six-component dynamometer, is used to measure the complete torsor of the cutting actions in the case of self-excited vibrations. Many results are obtained regarding the mechanical actions torsor. A confrontation of the moment components at the tool tip and at the central axis is carried out. It clearly appears that analysing moments at the central axis avoids the disturbances induced by the transport of the moment of the mechanical actions resultant at the tool tip point. For instance, the order relation between the components of the forces is single. Furthermore, the order relation between the moments components expressed at the tool tip point is also single and the same one. But at the central axis, two different order relations regarding moments are conceivable. A modification in the rolling moment localization in the (y, z) tool plan is associated to these two order relations. Thus, the moments components at the central axis are particularly sensitive at the disturbances of machining, here the self-excited vibrations.

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

    SciTech Connect (OSTI)

    Sheng, S.

    2012-07-01

    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.

  10. Climate & Environment | More Science | ORNL

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

    Climate & Environment SHARE Climate and Environment Climate and environmental scientists at ORNL conduct research, develop technology and perform analyses to understand and predict...

  11. FINAL Syllabus for Physics 260 -Fall 2014 General Physics: Vibrations, Waves, Heat, Electricity, and Magnetism

    E-Print Network [OSTI]

    Lathrop, Daniel P.

    FINAL Syllabus for Physics 260 - Fall 2014 General Physics: Vibrations, Waves, Heat, Electricity, and Magnetism Professor Daniel Lathrop - Sections 0101 through 0106 Official Course Description: General Physics), or PHYS272. Second semester of a three-semester calculus-based general physics course. Vibrations, waves

  12. Performance Analysis on Synthetic Aperture Radar-based Vibration Estimation in Clutter

    E-Print Network [OSTI]

    Santhanam, Balu

    from vibrating targets in real-world applications. In this paper, the performance of the two vibration in noise [8], [9]. This work was supported by the United States Department of Energy (Award No. DE-FG52-08NA28782), the National Science Foundation (Award No. IIS-0813747), National Consortium for MASINT

  13. Experimental Validation of Building Vibration Propagation Using a Four Story Laboratory Model

    E-Print Network [OSTI]

    White, Robert D.

    Experimental Validation of Building Vibration Propagation Using a Four Story Laboratory Model@acentech.com Robert D. White, Assistant Professor, Tufts University, Dept. of Mechanical Engineering, R vibration levels at each floor. Mathematical models of column, beam, and slab elements were developed

  14. Free Vibration Analysis of Kirchoff Plates with Damaged Boundaries by the Chebyshev Collocation Method

    E-Print Network [OSTI]

    Butcher, Eric A.

    an important role in applications of mechanical, aerospace and civil engineering. Studying the free vibrationFree Vibration Analysis of Kirchoff Plates with Damaged Boundaries by the Chebyshev Collocation Method Eric A. Butcher and Ma'en Sari Department of Mechanical and Aerospace Engineering, New Mexico

  15. Performance and Dynamic Stability of General-Path Centrifugal Pendulum Vibration

    E-Print Network [OSTI]

    Shaw, Steven W.

    Performance and Dynamic Stability of General-Path Centrifugal Pendulum Vibration Absorbers A. S. Alsuwaiyan and S. W. Shaw Department of Mechanical Engineering Michigan State University, East Lansing, MI 48824, USA RUNNING HEADLINE: GENERAL PATH CPVAS. #12;Abstract Centrifugal pendulum vibration absorbers

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

    E-Print Network [OSTI]

    Singh, Tarunraj

    Minimax design of vibration absorbers for linear damped systems Brandon Brown, Tarunraj Singh à Department of Mechanical and Aerospace Engineering, State University of New York at Buffalo, Buffalo, NY addresses the issue of design of a passive vibration absorber in the presence of uncertainties

  17. Numerical model for vibration damping resulting from the first-order phase transformations

    E-Print Network [OSTI]

    Melnik, Roderick

    : Martensite transformation; Thermo-mechanical coupling; Vibration damping; Ginzburg­Landau theory 1Numerical model for vibration damping resulting from the first-order phase transformations L Landau­Ginzburg theory that couples nonlinear mechanical and thermal fields. The free energy function

  18. Non-linear and Non-planar Free Thermal Vibration of SWNT in Molecular Dynamic Simulation

    E-Print Network [OSTI]

    Maruyama, Shigeo

    Non-linear and Non-planar Free Thermal Vibration of SWNT in Molecular Dynamic Simulation Heeyuen Koh, James Cannon, Shohei Chiashi, Junichiro Shiomi and Shigeo Maruyama Department of Mechanical-mail: maruyama@photon.t.u-tokyo.ac.jp 1. Introduction Vibration of suspended and cantilevered nanotubes

  19. Response of Test House to Vibroseis Vibrations and Environmental Forces DAVID L. TEASDALE 1

    E-Print Network [OSTI]

    seismic exploration employs four to six, in-line, truck-mounted vibrators to generate a seismic signal to 20 seconds (12 seconds in the seismic exploration case duplicated herein), no single frequency has ABSTRACT In response to public concerns about the damage potential of vibroseis vibrations from seismic

  20. Model of coarsening and vortex formation in vibrated granular rods Igor S. Aranson

    E-Print Network [OSTI]

    Tsimring, Lev S.

    Model of coarsening and vortex formation in vibrated granular rods Igor S. Aranson Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 Lev S. Tsimring Institute for Nonlinear Science spontaneous formation of the long-range orientational order and large- scale vortices in a system of vibrated

  1. Effects of quadrupole vibration of the fragments on. mu. - final state probabilities

    SciTech Connect (OSTI)

    Zheng Guo-tong; Wang Yan-sen; Yuan Zu-shu; Qiu Zhi-hong

    1988-01-01

    The muon final-state probabilities after muon-induced fission of /sup 238/U are calculated by using the LCAO (Linear Combination of Atomic Orbital) method. The ordinary viscosity of the fissioning nucleus, the deformations and quadrupole vibrations of the two fragments are taken into account. The calculated results are compared with those obtained by neglecting the quadrupole vibration

  2. Quantum chaos for the radially vibrating spherical billiard Richard L. Liboff and Mason A. Porter

    E-Print Network [OSTI]

    Porter, Mason A.

    Quantum chaos for the radially vibrating spherical billiard Richard L. Liboff and Mason A. Porter Chaos 17, 023116 (2007); 10.1063/1.2731307 Quantum Chaos in Billiards Comput. Sci. Eng. 9, 60 (2007); 10.1063/1.1322028 Vibrating soap films: An analog for quantum chaos on billiards Am. J. Phys. 66, 601 (1998); 10

  3. 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

  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 e,7]. Because of its ubiquitous existence, vibration becomes a very promising alternative energy sourceEnhanced vibration energy harvesting using dual-mass systems Xiudong Tang, Lei Zuo n Department

  5. Investigation of Non-synchronous Vibration Mechanism for a High Speed Axial Compressor Using Delayed DES

    E-Print Network [OSTI]

    Zha, Gecheng

    Investigation of Non-synchronous Vibration Mechanism for a High Speed Axial Compressor Using compressor. DDES is a hybrid model for turbulence simulation, which uses RANS model within the wall boundary a torsion moment causing NSV. 1 Introduction Non-synchronous vibration of axial fan/compressor is a non

  6. 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

  7. 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

  8. 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

  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 consists of three 3 metre long vertically aligned blades each fixed to the central shaft by two horizontal

  10. 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

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

    E-Print Network [OSTI]

    Yang, Yi

    2012-02-14

    -induced oscillation of the plate is studied. The Strouhal number is measured from the stationary plate in a low speed steady wind tunnel. A set of vibration tests are conducted to investigate the relationships between shedding frequency and vibration frequency. “lock...

  12. The Coulomb Pump: a Novel Parts Feeding Method using a Horizontally-Vibrating Surface

    E-Print Network [OSTI]

    Canny, John

    The Coulomb Pump: a Novel Parts Feeding Method using a Horizontally-Vibrating Surface Dan Reznik. Each vibration is a pump-like" motion along a single degree of freedom: the plate spends more time accuracy nor with premature part wear due to repeated collisions with the feeder. In the spirit

  13. 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

  14. High-Frequency Free Vibrations of Plates in the Reissner's Type Theory

    E-Print Network [OSTI]

    Ivanova, Elena A.

    Chapter 12 High-Frequency Free Vibrations of Plates in the Reissner's Type Theory Elena A. Ivanova eigenfre- quency spectra: one low-frequency spectrum whose asymptotic order is O(h), and two high-frequency the high- frequency spectra. That is why the problem of plate free vibrations with eigenfre- quencies whose

  15. STUDYING THE STREAMLINING OF A BLUNTED BODY BY A VIBRATIONAL-NONEQUILIBRIUM DISSOCIATED GAS

    E-Print Network [OSTI]

    Riabov, Vladimir V.

    STUDYING THE STREAMLINING OF A BLUNTED BODY BY A VIBRATIONAL-NONEQUILIBRIUM DISSOCIATED GAS O. Yu body by a vibrational~nonequilibrium dissociated gas within the framework of the CVDV model [i, 2 situations: the streamlining of a body under conditions of free natural flight and the streamlining

  16. Vibrational Lifetimes and Spectral Shifts in Supercritical Fluids as a Function of Density: Experiments and Theory

    E-Print Network [OSTI]

    Fayer, Michael D.

    (CO2) as a function of density from low density (well below the critical density) to high densityVibrational Lifetimes and Spectral Shifts in Supercritical Fluids as a Function of Density Vibrational lifetime and spectral shift data for the asymmetric CO stretching mode of W(CO)6 in supercritical

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

    E-Print Network [OSTI]

    Baudoin, Geneviève

    containing a magnetic excitation system with 8 arms bearing coils. Four of these are used to exciteA 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

  18. 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

  19. Effect of low-magnitude, high-frequency vibration on osteocytes in the regulation of osteoclasts

    E-Print Network [OSTI]

    You, Lidan

    - frequency (HF; 20­90 Hz) vibrations have gained interest as studies show that such a mechanical signal canEffect of low-magnitude, high-frequency vibration on osteocytes in the regulation of osteoclasts of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada c Department

  20. Active vibration suppression of a exible structure using smart material and a modular control patch

    E-Print Network [OSTI]

    Active vibration suppression of a ¯exible structure using smart material and a modular control patch G Song1 *, S P Schmidt2 and B N Agrawal2 1 Department of Mechanical Engineering, The University of vibration suppression of a ¯exible structure using smart materials and a miniaturized digital controller

  1. 0.6 0.8 1 1.2 1.4 EndpointVibration(%)

    E-Print Network [OSTI]

    Singhose, William

    0.6 0.8 1 1.2 1.4 0 5 10 15 20 25 30 EndpointVibration(%) Normalized Frequency, /m Limit Vibration SHAPERS FOR FLEXIBLE ROBOTIC SYSTEMS Michael Kenison William Singhose Department of Mechanical Engineering Georgia Institute of Technology Atlanta, GA 30332 USA Abstract: The performance of many mechanical systems

  2. Vibration Reduction for Flexible Spacecraft Attitude Control using PWPF Modulator and Smart

    E-Print Network [OSTI]

    Vibration Reduction for Flexible Spacecraft Attitude Control using PWPF Modulator and Smart Structures Gangbing Song Department of Mechanical Engineering The University of Akron Akron,Ohio 4 93943 Abstract-This paper presents a new approach to vibration reduction of flexible spacecraft during

  3. Monitoring a Building Using Deconvolution Interferometry. II: Ambient-Vibration Analysis

    E-Print Network [OSTI]

    Snieder, Roel

    Monitoring a Building Using Deconvolution Interferometry. II: Ambient- Vibration Analysis by Nori inside a building is a powerful technique for monitoring parameters of the building, such as velocities interferometry to ambient-vibration data, instead of using earthquake data, to monitor a building. The time

  4. 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

  5. Environment scattering in GADRAS.

    SciTech Connect (OSTI)

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

    2013-09-01

    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.

  6. Energy/Environment/Commissioning 

    E-Print Network [OSTI]

    Nakahara, N.

    2006-01-01

    Nobuo NakaharaNobuo Nakahara ICEBO/APCBCAsia Pacific Conference on Building Commissioning 2006.11.7 Opening AddressOpening AddressEnergy/Environment/CommissioningEnergy/Environment/Commissioning Call for Call for partipationpartipation...%45%42%39%36%15%10%10%9%9%7%12%13%14%15%12%18%19%20%21%4%4%5%5%6%1%4%4%5%5%4%5%5%6%7% 02,0004,0006,0008,00010,00012,00014,00016,00018,00019712002201020202030 ?????????? 5,53610,34512,19414,40416,487OECD?????????????????????????????? ????IEA/World Energy Outlook 2004 Actual and Estimated Energy Demand in the World Africa Middle East...

  7. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid you not findGeoscience/Environment Geoscience/Environment Print From the

  8. Dumping Dirty Diesels: The View From the Bridge | Department...

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

    Dumping Dirty Diesels: The View From the Bridge Dumping Dirty Diesels: The View From the Bridge 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations and Posters...

  9. Track-Following Control with Active Vibration Damping of a PZT-Actuated Suspension Dual-Stage Servo System

    E-Print Network [OSTI]

    Horowitz, Roberto

    Track-Following Control with Active Vibration Damping of a PZT-Actuated Suspension Dual-Stage Servo system in hard disk drives. The proposed control structure includes an active vibration damping control loop and a track-following control loop. The vibration damping control loop, which runs at a faster

  10. Track-Following Control with Active Vibration Damping of a PZT-Actuated Suspension Dual-Stage Servo System 1

    E-Print Network [OSTI]

    Horowitz, Roberto

    Track-Following Control with Active Vibration Damping of a PZT-Actuated Suspension Dual-Stage Servo system in hard disk drives. The proposed control structure includes an active vibration damping control loop and a track- following control loop. The vibration damping con- trol loop, which runs at a faster

  11. REDUCTION OF VIBRATION-INDUCED ARTIFACTS IN SYNTHETIC-APERTURE-RADAR IMAGERY USING THE FRACTIONAL FOURIER TRANSFORM

    E-Print Network [OSTI]

    Santhanam, Balu

    REDUCTION OF VIBRATION-INDUCED ARTIFACTS IN SYNTHETIC-APERTURE-RADAR IMAGERY USING THE FRACTIONAL of objects exhibit- ing low-level vibrations are accompanied by localized arti- facts, or ghost targets to the non-stationary nature of the returned signals from vibrating objects. Re- cently, a method based

  12. 1998 SPIE Smart Structures and Materials Conf. Paper #332919/332742 High bandwidth tunability in a smart vibration absorber

    E-Print Network [OSTI]

    Flatau, Alison B.

    in a smart vibration absorber Alison B. Flatau, + Marcelo J. Dapino ++ and Frederick T. Calkins Terfenol­D vibration absorber is developed in this paper. An overview of magnetostriction including to achieve high bandwidth tunability in the performance of a Terfenol­D vibration absorber. Keywords

  13. Vibration of Wires in Liquid Argon Due to Fluid Flow Kirk T McDonald (kirkmcd@princeton.edu)

    E-Print Network [OSTI]

    McDonald, Kirk

    Vibration of Wires in Liquid Argon Due to Fluid Flow Kirk T McDonald (kirkmcd. But in these regions, the Reynolds number of the flow is 56/23 = 2.4, in which case the flow is laminar, not turbulent, and there is no excitation of wire vibration. So, I conclude that wire vibration due to fluid flow is negligible (unless

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

    SciTech Connect (OSTI)

    Capitelli, M.; De Pascale, O.; Shakatov, V.; Hassouni, K.; Lombardi, G.; Gicquel, A.

    2005-05-16

    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.

  15. 14th World Congress of IFACCOMPUTER-CONTROLLED VIBRATIONAL SET-UP FOR EDUCATI... Copyright 1999 IFAC

    E-Print Network [OSTI]

    14th World Congress of IFACCOMPUTER-CONTROLLED VIBRATIONAL SET-UP FOR EDUCATI... Copyright © 1999;14th World Congress of IFACCOMPUTER-CONTROLLED VIBRATIONAL SET-UP FOR EDUCATI... ISBN: 0 08 043248 4Copyright 1999 IFAC #12;14th World Congress of IFACCOMPUTER-CONTROLLED VIBRATIONAL SET-UP FOR EDUCATI

  16. Abstract--Command signals that can move a flexible system without residual vibration and also limit the

    E-Print Network [OSTI]

    Singhose, William

    Abstract-- Command signals that can move a flexible system without residual vibration and also to control unwanted vibration in flexible systems [1]-[6]. One approach involves designing a smooth reference command that leads to low levels of vibration [5], while others utilize command shaping [1

  17. f you think vibration research is boring or simple, you need to talk with Brian Feeny and

    E-Print Network [OSTI]

    Feeny, Brian

    Shaw. The duo heads up the Vibration Research Laboratory in the mechanical engineer- ing department of vibratory behavior of mechanical systems. In many systems vibrations are unwanted, while in othersI f you think vibration research is boring or simple, you need to talk with Brian Feeny and Steven

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

    E-Print Network [OSTI]

    studies, that low-level, mechanical signals, delivered using vibration, can stimulate bone formationContraindications 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

  19. JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 24, NO. 2, APRIL 2015 289 Vibration-Based Diagnostics for Rotary MEMS

    E-Print Network [OSTI]

    Rubloff, Gary W.

    , and therefore, vibration monitoring provides insight into the mechanical state of the bearings. MicroscaleJOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 24, NO. 2, APRIL 2015 289 Vibration (MEMS) tech- nology to perform vibration-based in situ monitoring, diagnostics, and characterization

  20. COLLEGE OF ENGINEERING Environment

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    COLLEGE OF ENGINEERING Environment #12;Engineeringhas always been an essential element of society, and interaction. The engineer of the future is charged with revolutionizing the ways that we impact the world around us in order to build a healthy future. With respect to natural sciences and the engineering

  1. Multiprocessor programming environment

    SciTech Connect (OSTI)

    Smith, M.B.; Fornaro, R.

    1988-12-01

    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.

  2. 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

  3. Making the Link Environment

    E-Print Network [OSTI]

    advantage of economic opportunities offered in cities, or because of degraded environments in rural areas waste, sewage, and air pollution, as well as demands for energy, food, and other resources. In many infrastructure and regulatory mechanisms for coping with these side effects of growth, Demands on natural

  4. Population, Consumption & the Environment

    E-Print Network [OSTI]

    Columbia University

    consumes the 77 trillion barrels of oil energy equivalent per year ­ Fossil fuel consumption (oil, coal12/11/2009 1 Population, Consumption & the Environment Alex de Sherbinin Center for International of carbon in 2001 · The ecological footprint, a composite measure of consumption measured in hectares

  5. 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

  6. Environment, Heritage and

    E-Print Network [OSTI]

    Little, Tony

    , heritage sites around Falkirk, and locations within Loch Lomond and the Trossachs National Park. Links with industry are strong and the programme benefits from visits from guest speakers who are experts in the field the Scottish environment first hand. 4. You will be taught by a strong team, with excellent industry links

  7. 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

    1988-08-01

    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.

  8. 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.

    2014-09-29

    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.

  9. Note: Reliable low-vibration piezo-mechanical shutter

    SciTech Connect (OSTI)

    Bauer, Michael, E-mail: mibauer@physik.uni-kl.de; Franzreb, Philipp Pierre; Widera, Artur [Department of Physics and State-Research Center OPTIMAS, University of Kaiserslautern, 67663 Kaiserslautern (Germany); Spethmann, Nicolas [Department of Physics, University of California, Berkeley, California 94720 (United States)

    2014-09-15

    We present a mechanical shutter based on a bending piezo-actuator. The shutter features an active aperture of about 2 mm, allowing for full extinction and lossless transmission of a beam. Acoustic noise and mechanical vibrations produced are very low and the shutter is outstandingly long-lived; a test device has undergone 20 × 10{sup 6} cycles without breaking. A reflector makes the shutter capable of reliably interrupting a beam with at least 2 W of cw power at 780 nm. The shutter is well suited to create pulses as short as 16 ms, while pulse lengths down to 1 ms are possible. The rise and fall times are approximately 120 µs, with a delay of 2 ms. Jitter stays below 10 µs, while long-term drifts stay well below 500 µs.

  10. Nature of the Frequency Shift of Hydrogen Valence Vibrations

    E-Print Network [OSTI]

    Zhyganiuk, I V

    2015-01-01

    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.

  11. Test of quantum chemistry in vibrationally-hot hydrogen molecules

    E-Print Network [OSTI]

    Niu, M L; Ubachs, W

    2015-01-01

    Precision measurements are performed on highly excited vibrational quantum states of molecular hydrogen. The $v=12, J=0-3$ rovibrational levels of H$_2$ ($X^1\\Sigma_g^+$), lying only $2000$ cm$^{-1}$ below the first dissociation limit, were populated by photodissociation of H$_2$S and their level energies were accurately determined by two-photon Doppler-free spectroscopy. A comparison between the experimental results on $v=12$ level energies with the best \\textit{ab initio} calculations shows good agreement, where the present experimental accuracy of $3.5 \\times10^{-3}$ cm$^{-1}$ is more precise than theory, hence providing a gateway to further test theoretical advances in this benchmark quantum system.

  12. Effects of longitudinal vibration on tensile properties of weldments

    SciTech Connect (OSTI)

    Tewari, S.P.; Shanker, A. . Dept. of Mechanical Engineering)

    1994-11-01

    This paper presents the effect of longitudinal vibration, frequency and amplitude on yield strength, ultimate tensile strength, breaking strength and percentage of elongation on weldments prepared by the shielded metal arc process. The frequency range selected was 0 to 400 Hz, and the amplitude range was 0 to 40 [mu]m. It was found that the tensile properties of the weldments improved when compared with the static welded test specimens, but there was a reduction in the percentage of elongation for specimens prepared under vibratory conditions. Increased frequency resulted in better tensile properties, but the percentage of elongation was reduced with an increase in frequency. Frequency in the range of 0 to 400 Hz and amplitude from 5 to 30 [mu]m gave good results.

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

    E-Print Network [OSTI]

    Mease, Kenneth D.

    WELCOME TO BLUE VIEW VISION INSIGHT! Good news--your vision plan is flexible and easy to use, your discounts, and much more! Blue View VisionSM Insight University of California Student Health Insurance Plan (UC SHIP) 2014/15 Your Blue View Vision Insight network Blue View Vision Insight offers you

  14. 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

  15. 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

  16. Environment and Protostellar Evolution

    E-Print Network [OSTI]

    Zhang, Yichen

    2014-01-01

    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...

  17. Corroborating Information from Disagreeing Views Alban Galland

    E-Print Network [OSTI]

    Doyen, Laurent

    variety of information and viewpoints from individual Web sources that have different degree sources, many sources will continue to list outdated information if a person has switched jobsCorroborating Information from Disagreeing Views Alban Galland INRIA Saclay ­ Île-de-France LSV ENS

  18. A VIEW OF MATHEMATICS Alain CONNES

    E-Print Network [OSTI]

    Connes, Alain

    A VIEW OF MATHEMATICS Alain CONNES Mathematics is the backbone of modern science and a remarkably e#cient source of new concepts and tools to understand the ``reality'' in which we participate. It plays a basic role in the great new theories of physics of the XXth century such as general relativity, and quantum

  19. Longer View The Road Less Driven

    E-Print Network [OSTI]

    Handy, Susan L.

    Longer View The Road Less Driven Susan Handy I n September 2005, Hurricane Katrina slammed into New.S. Department of Energy [DOE], 2005a), a level unseen in inflation-adjusted terms even at the peak of the late 1970s energy crisis (DOE, 2005b). Shortages in the gasoline supply occurred temporarily in many parts

  20. Accelerated Volumetric Reconstruction From Uncalibrated Camera Views

    E-Print Network [OSTI]

    Whelan, Paul F.

    Accelerated Volumetric Reconstruction From Uncalibrated Camera Views Felicia Brisc, M.S. Ph. D-calibration 11 2.1.2 Bundle Adjustment 13 2.2 Volumetric Reconstruction ................................................. 14 2.2.1 Volumetric Intersection ........................................... 15 2.2.2 Voxel Carving