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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 99 for “"force balance"”.
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Electrostatic force balance microscopy
… instrumentation design than the modern atomic force microscope (AFM). The basic AFM instrument allows studies of localizing phenomena at the nanoscale using an atomically sharp tip with precise positioning control, an exquisitely sensitive scheme for measuring tiny forces using a flexible …
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The Development of a Force Balance for Testing Micro Aerial Vehicles
… this work was to create a six degree of freedom balance that could produce meaningful data for micro aerial vehicles. Research was conducted to investigate the common balance configurations, and the strengths and weaknesses of each configuration were used to select the most appropriate design. …
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Evolution of radial force balance and radial transport over L-H transition
… barrier" in H-mode confinement ii) the radial force balance between pressure gradient forces and electromagnetic (radial electric field and VxB) forces require radial particle fluxes to satisfy a pinch-diffusion relation. A recent study suggests that the major difference between L-mode and …
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The Molecular Basis of Tissue Elasticity and Force Balance During Drosophila Gastrulation
… any material rely on two things: the physical forces forming the fold and the material properties of the substance being folded. When working in biological tissue such as an early Drosophila embryo, there is no existing way to directly measure morphogenetic forces, and the relative …
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The development of an automated system for electrical characterization of cells using a novel force balance method
… the equilibrium position originating from the force balance between hydrodynamic and DEP forces to infer the cellular dielectric properties. For thorough DEP characterization, changing different conditions of cells is an essential but time-consuming process which usually takes hours to days. …
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A new model for electric force microscopy and its application for electrostatically generated phase difference in tapping mode AFM
The harmonic force balance method was used to model and simulate electric force microscopy (EFM) and electrostatically generated phase difference in tapping mode AFM (EPTA) measurements. Simulations show that the harmonic force balance approach matches and explains EFM and EPTA experimental results …
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A numerical model for the axisymmetric equilibrium shape of drops in uniform motion: Effects of external flow, electric field and surface charge
… around a sphere. In contrast, the current force balance model uses the complete form of differential Laplace's formula and includes adjustments to the aerodynamic pressure distribution for the effects of drop distortion and Reynolds number. The raindrop shapes under the influence of …
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Particle separation via the hybrid application of optical and acoustic forces
… method of manipulating particles with the forces exerted by a laser beam, while acoustic trapping is a scalable technique capable of exerting a force on particles through standing wave resonance. These complimentary modalities can be utilised in a hybrid system to give a resultant technique …
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Predicting Drag Polars For Micro Air Vehicles
… area to planform area from 2.6 to 3.9. <p> A force balance was used to measure the lift and drag on the MAVs at angles of attack ranging from -5 degrees (or -10 degrees) to 10 degrees. The force balance allowed the MAVs to rotate in the pitching axis. The MAV angle of attack was set using an …
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Vapor Bubble Detachment in Subcooled Pool Boiling at Zero Gravity
… and numerically. Instead of analyzing the force balance, this study emphasizes momentum conservation, the time integral of the force. The liquid velocity is derived from the velocity potential. Heat and mass transfer across the interface are governed by a nonequilibrium model. The liquid …
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Melt motion in floating-zone process for single crystal growth with an axial magnetic field
… by using asymptotic expansion. Centrifugal force, crystal growth speed, buoyancy, thermocapillarity and electromagnetic body force are the driving forces involved in the floating-zone process for growing single crystal. The strong, DC magnetic field eliminates the inertial effect of the melt …
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Effects of added drag on cetaceans : fishing gear entanglement and external tag attachment
… cost of movement depends on the resistive forces acting on an animal; changes in this force balance can occur naturally or unnaturally. Fishing gear that entangles large whales adds drag, often altering energy balance to the point of terminal emaciation. An analog to this is drag from tags …
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Role of Molecular Motors and Maps in Spindle Dynamics and Chromosome Segregation in the Fission Yeast Schizosaccharomyces Pombe
… protein (MAPs). Motors such as kinesins generate forces within the spindle while MAPs perform functions such as organize the spindle pole and maintain the bipolar spindle. Both motors and MAPs contribute to spindle mechanics. Here I used the relatively simple fission yeast to address how defects …
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Effects and added drag on cetaceans : fishing gear entanglement and external tag
… cost of movement depends on the resistive forces acting on an animal; changes in this force balance can occur naturally or unnaturally. Fishing gear that entangles large whales adds drag, often altering energy balance to the point of terminal emaciation. An analog to this is drag from tags …
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Performance measurement and visualization on the refrigerant distribution in the vertical manifold of the microchannel tube heat exchanger
… regime. Based on the visualization results and force balance analysis, the liquid distribution is mainly determined by the competition between the inertial and buoyancy forces. The force balance determines where liquid goes, and further determines the distribution. Froude number is an …
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The fixture and methodologies for evaluating vibration characteristics of hand-held pneumatic impact tools
… tool's working surface were calculated using a force balance model of the impact tool and the test fixture. From the acceleration measurements made at the impact tool's handle, vibration exposure levels were calculated for four and eight hour exposure time periods. Test procedures and methods …
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Kalman filtering of IMU sensor for robot balance control
… information on the orientation of a robot for balance control. A test bed was created to characterize the random noise and errors inherent to orientation sensing in the MicroStrain 3DM-GX1 IMU for static cases as well as after experiencing an impact force. Balance simulations were performed to …
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Aerodynamics of a swept wing with leading-edge ice at low Reynolds number
… λ=0.296. The experimental techniques used were force balance measurements, surface pressure measurements, surface oil flow visualization and 5-hole probe wake surveys. Tests were performed at Reynolds numbers of 3x105, 6x105 and 7.8x105 and corresponding Mach numbers of 0.08, 0.15 and 0.2. Force …
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The kinematics and dynamics of active mountain ranges
… and strength of the foreland over time. Using force-balance arguments, I estimate the static coefficient of friction on foreland faults to be between 0.01–0.28. The second study expands in scope to examine the forces governing deformation along mountain range fronts, by analysing slip vectors …
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On the Shape of the Free Surface of a Rubber-Like Material in Proximity to a Rigid Contactor
… on the surface free-energy density, and impose force balance both in the bulk and on the surface. From the resulting linearized bulk and superficial equations, we derive a quintic dimensionless dispersion relation and perform a parametric study to see when linearly stable or unstable behavior of …
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