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Dissertations / Theses on the topic 'I band dynamic stiffness'

Author: Grafiati

Published: 10 March 2023

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1

周婉娥 and Wan-E. Zhou. "The dynamic stiffness method." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31235487.

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2

Leung, A. Y. T. "Dynamic stiffness and substructures." Thesis, Aston University, 1993. http://publications.aston.ac.uk/21737/.

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3

Zhou, Wan-E. "The dynamic stiffness method /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19668612.

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4

Alley, Ferryl. "Dynamic ankle stiffness during upright standing." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110417.

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Studies of upright stance commonly model its biomechanics as an inverted pendulum, defining an overall postural stiffness, generated by the ankle joints, needed to overcome gravity's destabilizing effects. This model assumes symmetric left and right ankle stiffness, fixed throughout upright stance. However, the relative contributions of the intrinsic and reflex components of dynamic stiffness and how lower limbs interact during upright standing is not well understood. This thesis estimated the dynamic stiffness in both ankles simultaneously during upright standing and examined coordination bet

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5

郭騰川 and Tang-chuen Nick Kwok. "Dynamic stiffness method for curved structures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31212359.

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6

Kwok, Tang-chuen Nick. "Dynamic stiffness method for curved structures /." Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19672421.

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7

Vega, González Myraida Angélica. "Dynamic study of tunable stiffness scanning microscope probe." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32967.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>Includes bibliographical references (leaf 31).<br>This study examines the dynamic characteristics of the in-plane tunable stiffness scanning microscope probe for an atomic force microscope (AFM). The analysis was carried out using finite element analysis (FEA) methods for the micro scale device and its macro scale counterpart, which was designed specifically for this study. Experimental system identification testing using sound wave and high-speed camera recordings was clone on the macro scale versi

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8

Garcia, Maria-José. "Engineering rubber bushing stiffness formulas including dynamic amplitude dependence." Licentiate thesis, KTH, Aeronautical and Vehicle Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4017.

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<p>Engineering design models for the torsion and axial dynamic stiffness of carbon black filled rubber bushings in the frequency domain including amplitude dependence are presented. They are founded on a developed material model which is the result of applying a separable elastic, viscoelastic and friction rubber component model to the material level. Moreover, the rubber model is applied to equivalent strains of the strain states inside the torsion or axial deformed bushing previously obtained by the classical linear theory of elasticity, thus yielding equivalent shear moduli which are insert

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9

Garcia, Maria-José. "Engineering rubber bushing stiffness formulas including dynamic amplitude dependence /." Stockholm : Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4017.

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10

Carrella, Alessandro. "Passive vibration isolators with high-static-low-dynamic-stiffness." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/51276/.

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In many engineering applications there is need to reduce the level of vibrations that are transmitted from a source to a receiver. Amongst several different techniques, the most commonly adopted solution is to interpose an isolation mount between the source and the receiver. Ideally, a vibration isolation mount would have a high static stiff- ness to prevent too large a static displacement to occur, but a low dynamic stiffness which reduces the natural frequency and extends the frequency range of isolation. For linear mounts these two features are mutually exclusive. However, an improved com-

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11

Johnson, Stephanie. "Pediatric Dynamic Shoulder Stiffness Predicted From Quasi-Static Impacts." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483704973274323.

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12

Berggren, Eric. "Railway Track Stiffness : Dynamic Measurements and Evaluation for Efficient Maintenance." Doctoral thesis, KTH, Farkost och flyg, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10360.

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Railway track stiffness (vertical track load divided by track deflection) is a basic parameter oftrack design which influences the bearing capacity, the dynamic behaviour of passing vehiclesand, in particular, track geometry quality and the life of track components. Track stiffness is abroad topic and in this thesis some aspects are treated comprehensively. In the introductionpart of the thesis, track stiffness and track stiffness measurements are put in their propercontext of track maintenance and condition assessment. The first aspect is measurement of track stiffness. During the course of t

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13

Cheng, Yongming 1964. "Dynamic stiffness and transfer matrix analysis of marine riser vibration." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/107859.

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14

Yuan, Han. "Static and dynamic stiffness analysis of cable-driven parallel robots." Thesis, Rennes, INSA, 2015. http://www.theses.fr/2015ISAR0003/document.

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Cette thèse contribue à l'analyse des raideurs statique et dynamique des robots parallèles à câbles dans un objectif d'amélioration de la précision de positionnement statique et de la précision de suivi de trajectoire. Les modélisations statique et dynamique proposées des câbles considèrent l'effet du poids du câble sur son profil et l'effet de masse du câble sur la dynamique de ce dernier. Sur la base du modèle statique de câble proposé, l'erreur de pose statique au niveau de l'organe terminal du robot est définie et sa variation en fonction de la charge externe appliquée est utilisée pour év

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15

El-Tayeb, Nabil Said Mohamed. "The dynamic properties of ball bearings." Thesis, University of Leeds, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366386.

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16

Black, Thomas Andrew. "Spectral Element Analysis of Bars, Beams, and Levy Plates." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/33260.

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This thesis is primarily concerned with the development and coding of a Levy-type spectral plate element to analyze the harmonic response of simply supported plates in the mid to high frequency range. The development includes the governing PDE, displacement field, shape function, and dynamic stiffness matrix. A two DOF spectral Love bar element and both a four DOF spectral Euler-Bernoulli and a four DOF spectral Timoshenko beam element are also developed to gain insight into the performance of spectral elements. A cantilever beam example is used to show how incorporating eigenfunctions

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17

Black, T. Andrew. "Spectral Element Analysis of Bars, Beams, and Levy Plates." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/33260.

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This thesis is primarily concerned with the development and coding of a Levy-type spectral plate element to analyze the harmonic response of simply supported plates in the mid to high frequency range. The development includes the governing PDE, displacement field, shape function, and dynamic stiffness matrix. A two DOF spectral Love bar element and both a four DOF spectral Euler-Bernoulli and a four DOF spectral Timoshenko beam element are also developed to gain insight into the performance of spectral elements. A cantilever beam example is used to show how incorporating eigenfunctions

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18

Miller, Joel Christopher. "Modulating dynamic stiffness of a direct-drive brushless linear DC motor." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16103.

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19

Andersson, Patrik. "Finite Element and Dynamic Stiffness Analysis of Concrete Beam-Plate Junctions." Thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-198509.

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Measurements and predictions of railway-induced vibrations are becoming a necessity in today’s society where land scarcity causes buildings to be put close to railway traffic. The short distances mean an increased risk of the indoor vibration and noise disturbances experienced by residents. In short, the scope of the project is to investigate the transmission loss and vibration level decrease across various junction geometries. The junctions are modelled in both the Finite Element Method (FEM) and the Dynamic Stiffness Method (DSM). Resonances are avoided when possible by using semi-infinite b

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20

HYLOK, JEFFERY EDWARD. "EXPERIMENTAL IDENTIFICATION OF DISTRIBUTED DAMPING MATRICES USING THE DYNAMIC STIFFNESS MATRIX." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1029527404.

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21

Winstead, Michael. "Translation of L and S Band Tracking Assets to X Band High Dynamic Testing." International Foundation for Telemetering, 2006. http://hdl.handle.net/10150/603933.

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ITC/USA 2006 Conference Proceedings / The Forty-Second Annual International Telemetering Conference and Technical Exhibition / October 23-26, 2006 / Town and Country Resort & Convention Center, San Diego, California<br>Recent Constraints on the use of L and S band spectrum led to the search for additional Frequency Domain Bandwidth augmentation for test range telemetry needs. The ITU (International Telecommunications Union) approved X band region is listed as 7000 MHz to 8500 MHz for telemetry space applications. Bandwidth is available within this domain subject to the WARC (World Administrati

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22

Pasha, Hasan G. "Estimation of Static Stiffnesses from Free Boundary Dynamic (FRF) Measurements." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1416569956.

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23

Roach, M. P. "Vibration control in rotating machinery using variable dynamic stiffness hydrostatic squeeze-films." Thesis, Staffordshire University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254234.

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24

Stenholm, Roland. "Time-Multiplexed Channel Switches for Dynamic Frequency Band Reallocation." Thesis, Linköpings universitet, Datorteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-128793.

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A partially parallel reconfigurable channel switch is constructed for use in DFBR. Its permutation can be changed while running without any interruption in the streams of data. Three approaches are tried: one based on asorting network, one based on memories and multiplexers and one based on a Clos network. Variants with the pattern stored in memories and in shift registers are tried. They are implemented in automatically generated Verilog and synthesized for an FPGA. Their cost in terms of area use, memory use and maximum clock frequency is compared and the results show that the Clos based app

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25

Randle, Andrew Martin. "Dynamic radio channel effects from L-band foliage scatter." Thesis, University of York, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341630.

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26

Maolin, Liao. "Dynamic methods of stiffness identification in impacting systems for rotary-percussive drilling applications." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=230156.

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Stiffness identification of an impacted constraint is the main issue discussed in this thesis. Primarily, a change of stability (bifurcation) is used to determine the dynamical stiffness of an impacted beam for a piecewise-linear impact oscillator. Detailed one- and two-parameter bifurcation analyses of this impacting system are carried out by means of experiments and numerical methods. Particularly, the two-parameter numerical continuation of the obtained codimension-one bifurcation (period-doubling bifurcation, or fold bifurcation) indicates a strong monotonic correlation between the stiffne

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27

Berggren, Eric. "Dynamic track stiffness measurement : a new tool for condition monitoring of track substructure /." Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-341.

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28

Kareaga, Laka Zorion. "Dynamic stiffness and damping prediction on rubber material parts, FEA and experimental correlation." Thesis, London Metropolitan University, 2016. http://repository.londonmet.ac.uk/1125/.

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The final objective of the present work is the accurate prediction of the dynamic stiffness behaviour of complex rubber parts using finite element simulation tools. For this purpose, it becomes necessary to perform a complex rubber compound material characterisation and modelling work; this needs two important previous steps. These steps are detailed in the present document together with a theoretical review of viscoelastic visco-elasto-plastic models for elastomers. Firstly, a new characterisation method is proposed to determine the degree of cure of rubber parts. It is known that the degree

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29

Li, Xiaoming. "The effect of stiffness and mass on the dynamic response of wood floors." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06112009-063311/.

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30

Smith, Jeremy Richard Denham. "Statistical energy analysis of marine structures with periodic and near-periodic components." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287051.

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31

Wang, Narisi. "X-band class-E power amplifiers with dynamic bias control." Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3218998.

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32

Lewandowski, Cyprian(Cyprian Krzysztof). "Dynamic polarizability and collective modes in narrow-band electron systems." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/130218.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, May, 2020<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 114-123).<br>The family of moiré materials, in particular the magic angle twisted bilayer graphene, has emerged recently as a platform to study strongly interacting physics. This thesis analyzes the impact of the ultranarrow Bloch bands and strong electron-electron interactions on the dynamical polarization response of these systems. Strong interactions alter the collective charge dynamics in a number of

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33

Dodgen, Eric Ray. "Spinal Implant with Customized and Non-Linear Stiffness." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2699.

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There is a need for spinal implants that have nonlinear stiffness to provide stabilization if the spine loses stiffness through injury, degeneration, or surgery. There is also a need for spinal implants to be customizable for individual needs, and to be small enough to be unobtrusive once implanted. Past and ongoing work that defines the effects of degeneration on the torque rotation curve of a functional spinal unit (FSU) were used to produce a spinal implant which could meet these requirements. This thesis proposes contact-aided inserts to be used with the FlexSuRe™ spinal implant to create

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34

Ma, Qinglong. "A study of the dynamic behavior of piecewise nonlinear oscillators with time-varying stiffness." Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1127847551.

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35

Hannon, Ashley. "Dynamic strain profile of the ice hockey stick: Comparisons of calibre and shaft stiffness." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=95241.

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The primary purpose of this study was to develop a method to quantify the dynamic strain profile (DSP) of an ice hockey stick's shaft, and secondly, to use this method to assess the potential influence of player skill calibre and stick shaft properties on DSP during both the slap and wrist shots. Seventeen adult males performed a series of shots using two different stiffness ranked sticks in a laboratory setting on synthetic ice surface. These subjects were subdivided as high and low calibre players. Dependent measures included were: 1) five paired strain gauge responses along the shaft's l

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36

Frohling, Robert Desmond. "Deterioration of railway track due to dynamic vehicle loading and spatially varying track stiffness." Thesis, Pretoria : [s.n.], 1997. http://upetd.up.ac.za/thesis/available/etd-01122009-160350.

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37

Narby, Erik. "Modeling and Estimation of Dynamic Tire Properties." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6153.

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<p>Information about dynamic tire properties has always been important for drivers of wheel driven vehicles. With the increasing amount of systems in modern vehicles designed to measure and control the behavior of the vehicle information regarding dynamic tire properties has grown even more important.</p><p>In this thesis a number of methods for modeling and estimating dynamic tire properties have been implemented and evaluated. The more general issue of estimating model parameters in linear and non-linear vehicle models is also addressed.</p><p>We conclude that the slope of the tire slip curv

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38

Ho, Van-Cuong. "Dynamic ruggedizing of printed circuit boards in harsh environmental conditions using a wide-band dynamic absorber." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/34955.

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The existing approaches to ruggedizing inherently fragile and sensitive critical components of electronic equipment such as printed circuit boards (PCB) for use in hostile industrial and military environment are either insufficient or quite expensive. This Thesis addresses a novel approach towards ruggedizing commercially-off-the-shelf PCBs using a miniature wide-band dynamic absorber aimed at essential suppressing of the resonant responses of the original structure. The development of an optimisation technique is based on the dynamic properties of the original system, where the mass, stiffnes

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39

Lewis, Ray. "High Speed Target C-Band Feed Upgrade for Autotracking High Dynamic Targets." International Foundation for Telemetering, 2012. http://hdl.handle.net/10150/581459.

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ITC/USA 2012 Conference Proceedings / The Forty-Eighth Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2012 / Town and Country Resort & Convention Center, San Diego, California<br>A new common aperture autotracking C-band feed, specifically designed to accurately track fast moving targets such as the Lance missile, is reviewed. Measured data demonstrates exceptional tracking modulation required for good tracking performance while simultaneously providing excellent data channel performance for high G/T over the entire 4.40-5.25 GHz band. The new patent app

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40

Harrison, Christopher. "The detection of delaminations in vibrating composite beams." Thesis, University of Bath, 2000. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323574.

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41

Balupari, Raja Shekar. "VALIDATION OF FINITE ELEMENT PROGRAM FOR JOURNAL BEARINGS -- STATIC AND DYNAMIC PROPERTIES." UKnowledge, 2004. http://uknowledge.uky.edu/gradschool_theses/325.

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The analysis of bearing systems involves the prediction of their static and dynamic characteristics. The capability to compute the dynamic characteristics for hydrodynamic bearings has been added to Bearing Design System (BRGDS), a finite element program developed by Dr. R.W. Stephenson, and the results obtained were validated. In this software, a standard finite element implementation of the Reynolds equation is used to model the land region of the bearing with pressure degrees of freedom. The assumptions of incompressible flow, constant viscosity, and no fluid inertia terms are made. The pre

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42

Oman, Emmanuel Kabu. "Determination of the dynamic stiffness of a hydrostatic carriage of a high-speed milling machine." [Gainesville, Fla.]: University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE0000584.

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43

Tavares, Rui Afonso. "Influence of the Vertical Support Stiffness on the Dynamic Behavior of High-Speed Railway Bridges." Thesis, KTH, Bro- och stålbyggnad, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36795.

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44

Forster, Shauna. "A bilateral electro-hydraulic actuator system to measure dynamic ankle joint stiffness during human stance /." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80012.

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The role of the stretch reflex during upright stance remains unclear despite research that has been conducted to date. We have developed a bilateral electro-hydraulic actuator system to measure the dynamic joint stiffness of the human ankle during standing and help understand the role of the stretch reflex in the control of posture. The apparatus consists of two foot pedals that are each connected to an electro-hydraulic rotary actuator. Transducers were incorporated to measure the position and torque of each actuator, the angle of the ankle with respect to the foot plate, and the positions of

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45

Stanton, Kevin V. "Investigation of Parameters Influencing Reverse Fault Rupture Propagation to the Ground Surface." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1145.

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Surface fault rupture poses a serious threat to infrastructure in many seismically active regions, but knowledge about the factors which control the likelihood of surface displacement is limited. Current probabilistic frameworks rely only on fault mechanism and moment magnitude to predict the probability of rupture to the ground surface. However, recent work has shown that there may be other parameters which also deserve consideration. For example, statistical analyses have demonstrated that variation in near surface material stiffness may significantly affect the probability of surface ruptur

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46

Deymier, Pierre A., Vitthal Gole, Pierre Lucas, Jérôme O. Vasseur, and Keith Runge. "Tailoring phonon band structures with broken symmetry by shaping spatiotemporal modulations of stiffness in a one-dimensional elastic waveguide." AMER PHYSICAL SOC, 2017. http://hdl.handle.net/10150/625507.

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Spatiotemporal modulations of the elastic properties of materials can be used to break time and parity symmetry of elastic waves. We show that the form of the elastic band structure depends not only on the spatial and temporal periodicity of a spatiotemporal modulation but also on its shape through its Fourier components. We demonstrate that hybridization gaps open from interactions between the Bloch modes of the periodic medium in absence of the temporal variation of the modulation and the combined sinusoidal components of the Fourier decomposition of the periodic modulation.

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47

Tufano, Saverio. "Dynamic response of the coupled human body and seat in vertical and fore-and-aft direction." Thesis, Universita' degli Studi di Catania, 2011. http://hdl.handle.net/10761/373.

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In many environments vibration is transmitted to a person through a seat. Seats can be designed to reduce the discomfort and the injuries caused by vibration. The efficiency of a seat in reducing vibration depends on the characteristics of the vibration, the characteristics of the seat, and the characteristics of the person sitting on the seat (Griffin, 1990). This research was designed to investigate several aspects of the transmission of vertical and fore-and-aft vibration through polyurethane foams used in seat construction. The research programme was focused on two experiments. The first e

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48

Caupp, Sarah N. "PMHS Shoulder Stiffness Determined by Lateral and Oblique Impacts." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397649566.

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49

Rubio, Pedro, Francisco Fernandez, and Francisco Jimenez. "REAL TIME C BAND LINK BUDGET MODEL CALCULATION." International Foundation for Telemetering, 2016. http://hdl.handle.net/10150/624184.

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The purpose of this paper is to show the integration of the transmission gain values of a telemetry transmission antenna according to its relative position and integrate them in the C band link budget, in order to obtain an accuracy vision of the link. Once our C band link budget was fully performed to model our link and ready to work in real time with several received values (GPS position, roll, pitch and yaw) from the aircraft and other values from the Ground System (azimuth and elevation of the reception telemetry antenna), it was necessary to avoid a constant value of the transmitter

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50

Schafman, Michelle Ann. "Dynamic Structural Properties of Human Ribs in Frontal Loading." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429018120.

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