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Showing 1 to 19 of 19 for “"lever arm"”.
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Air piston approach to wave power generation
… which in turn raises or lowers one side of a lever arm about a stationary pivot point. This, thereby, raises or lowers a piston, which is attached to the opposite side of the lever through a cylinder, which causes large volumes of air to move. This air is funneled through drive turbines, which …
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The influence of microstructure on the creep properties of 441 ferritic stainless steel
… investigation was to design and manufacture two lever-arm type, constant load creep rigs in response to the need for a high quality creep test facility. These rigs were to be used to satisfy the initial objective and to evaluate an industry benchmark test used for determining the creep resistance …
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Hindrance of the Myosin Power Stroke Posed by the Proximity to the Troponin Complex Identified Using a Novel LRET Fluorescent Nanocircuit
… distinguishing myosin subfragment-1 (S1) lever arm orientations. The last acceptor allows the detection of S1's bound near or in between troponin complexes on the thin filament. Additionally, calcium related changes between troponin T and myosin were detected. Based on this data, the …
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Face Sheet/core Debonding In Sandwich Composites Under Static And Fatigue Loading
… Two analytical solutions for models (double cantilever beam (DCB) specimen and tilted debond specimen (TDS) test) based on elastic foundation analysis are modified and validated for mode I loading. For mixed mode static loading, mixed mode bending (MMB) specimen was employed to evaluate energy …
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Force multiplier in a microelectromechanical silicon oscillating accelerometer
… feature in the new design is a force multiplying lever arm which connects the oscillators to the proof mass. With this addition, the surface area of the proof mass is reduced by a factor of four, while the scale factor and axial resonant frequency of the previous design is retained. All vibration …
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Muscle glycogenolysis during weight-resistance exercise
… exercise. Total force application to the machine lever arm was determined and equated between trials via a strain gauge and computer interfaced system. After the sixth set, muscle glycogen degradation was similar in the HI and LO trials (46.9 ± 6.6 and 46.6 ± 6.0 mmol•kg-1 wet wt, respectively), …
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Fluorescence labeling and computational analysis of the strut of myosin's 50 kDa cleft.
… to induce opposite directions of movement in the lever arm. A sequence called the "strut" which traverses the 50 kDa cleft and may play an important role in positioning the actomyosin binding interface during actin binding is thought to be intimately linked to distant structural changes in the …
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Orientation of the Cardiac Myosin Regulatory Light Chain Determined by Polarized Fluorescence
… chain (RLC) of myosin is a component of the lever arm of the<br/>myosin motor in muscle thick filaments. Phosphorylation of RLC by myosin light<br/>chain kinase (MLCK) modulates the force and speed of muscle contraction, but the mechanisms of RLC‐mediated regulation in striated muscles are …
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An analysis of buckling in spherical shells and its design implications for hopper poppers
… which uses the mechanical advantage of a lever arm to invert a popper. Another is a design for new hopper poppers which could take less force to invert than a normal hopper popper, but store the same elastic potential energy.
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Conformational Studies of Myosin and Actin with Calibrated Resonance Energy Transfer
… exclude a number of versions of the swinging lever arm model, and indicate that actin participation is indispensable for conformational changes leading to force generation. The conformational selection during weak binding at the actomyosin interface may precock the myosin head for the ensuing …
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Single-Molecule Fluorescence Studies of ReAsH and Myosin VI
… at higher temperatures, suggesting that the lever arm becomes less rigid at higher temperatures. Circular dichroism spectrum confirmed a structural change at ∼30°C. We found that additional ADP increases the run-length of myosin VI, implying that the preference of myosin VI for ADP …
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Studies of myosin mechanics using fluorescence
… accuracy of LRET. LRET and FRET measured the lever arm swing of smooth muscle myosin II and confirmed that there was an actin dependent state. FIONA is able to track the position of a single dye with approximately one nanometer accuracy while DOPI is able to determine the dye's orientation. …
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The effects of perturbation frequency, magnitude, and uncertainty during static and dynamic tracking on the estimated level of muscle co-contraction
… of momentary changes in the resistance of the lever arm used to track the icons. In the first experiment with isometric tracking the effects of perturbation frequency, perturbation magnitude, tracking gain, tracking phase and the absence or presence of preview information on the level of …
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Phototaxis of Dictyostelium discoideum Slugs
… and bending the anterior zone like a lever-arm toward the light source. Furthermore, it was discovered that light irradiation enhances secretion of cyclic AMP from the slug and that light interferes with cyclic AMP cell-cell signaling during other multicellular stages as well. A model …
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FRET-Based Conformational Sensor for the m1 Muscarinic Cholinergic Receptor
… C-terminal region, which apparently acts as a lever arm, prior to placement of the CFP; and (3) the choice among circularly permuted CFP moieties. Finally, based on a homology-modeled structure of the M1 receptor, placement of the FlAsH site and the length of its flexible linkers were …
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Use of a Spine Robot Employing a Real Time Force Control Algorithm to Develop, Simulate, and Compare Spinal Biomechanical Testing Protocols: Eccentric Loading, Pure Moment, and a Novel Head Weight Protocol
… Pure Moment (PM), follower load, and eccentric lever arm (EL) loading methods. Although these methods are widely accepted, there is always a goal to try to better simulate physiologic loading conditions. While the follower load attempts to simulate compression due to muscle activation, no …
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Assessing possible economic or operational benefits of class 3 webs without stiffeners vs class 4 webs with stiffeners in steel plate girders
… moment resistance. This is due to the increased lever arm and having more material in the flange plates as explained in SASCH (2016). Though setting an upper limit on web slenderness βw, the South African steel design standard, SANS10162-1 allows designers to ignore the limit if calculations …
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Optimization of Pedicle Screw Depth in the Lumbar Spine: Biomechanical Characterization of Screw Stability and Pullout Strength
… displacement rate of 0.25 mm/sec along an 80 mm lever arm until the desired load was reached to apply a ±2 Nm moment. Motion was tracked using 4 infrared light-emitting diodes (irLED) markers attached to each pedicle to determine fulcrum location. To stimulate pull out forces, axial distraction …
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Modifiable risk factors of hamstring strain injury : assessment, performance and training
… in NHE performance angle manipulating the lever arm through which the centre of mass from the knee up is acting. Differences in instantaneous knee angle, MTU length and neuromuscular contributions of the BFLH and the ST to the task at break point could be related to the altered starting …