Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"pure moment"”.
-
A Passive Pure Moment Protocol for Testing Spine Segments: Development and Application
<p>The pure moment protocol is the accepted standard for performing in-vitro biomechanical testing of spinal devices. Published studies predominantly report range of motion and flexibility data, but information regarding the segment center of rotation is also relevant. Most current pure moment …
-
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
… to evaluate the subaxial cervical spine include 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 …
-
The Development and Application of a Custom Robotic Biomechanical Testing Platform Employing Real-time Load-control to Compare Spinal Biomechanical Testing Protocols: Pure Moment, Ideal Follower Load, and a Novel Trunk Weight Protocol
… two standard biomechanical protocols, the pure moment and the ideal follower load on 6 L4-L5 single motion segment units. The robotic performance of the system was evaluated by measuring the tracking errors during testing, or the difference between experimental forces being applied and the …
-
Use of a Multi-Axis Robotic Testing Platform to Investigate the Sagittal Mechanics of the Multi-Body Lumbar Spine
… lumbar spine using three different protocols: pure moment, eccentric loading, and a new method called combined loading moment. The objectives of the study were to introduce a new protocol that overcomes the limitations of previous methods by applying more realistic loading conditions and to …
-
Designing a mechanism to cleave silicon wafers
… silicon wafer and cleave it by providing a pure moment at a pre-etched v-notch while a vacuum was created on either side of the cut. The design of the vacuum chucks would also accommodate the smaller pieces of the wafer and would allow for the cleaving process to yield 19 mm x 34 mm die. The …
-
Towards understanding the dynamics of transformation in spiritual psychology with particular reference to Buddhist teachings
… Transformation is the recognition of the first pure moment of awareness which also recognizes that goodness is at the heart of all things. The liberating doctrine is that everything is open (empty) and unbounded thus all matter is redemptive and as such we are always in the realm of truth.
-
NOVEL NUMERICAL PROCEDURES FOR LIMIT ANALYSIS OF STRUCTURES: MESH-FREE METHODS AND MATHEMATICAL PROGRAMMING
… is used to approximate the displacement and moment fields in plate and slab problems, and second-order cone programming (SOCP) is used to solve the resulting discretised formulations. A numerical procedure using the EFG method and second-order cone programming for the kinematic limit analysis …
-
Large strain flexural testing of thin composite laminates
… Flexural behavior is characterized by the moment vs. curvature response therefore requiring a bending test. A special test fixture is developed to allow flexural testing of thin plates at large strains. Reaching large strains during the test provides an opportunity to investigate the large …
-
An Innovative Testing Protocol to Study Foot and Ankle Kinetics during Early Stance Phase of Gait
… of age were dissected and potted for testing. A pure moment protocol was developed to determine the path of least resistance or lowest energy state to rotate the tibia about the ankle complex. This protocol utilized a 4-degree of freedom robot coupled with a two 6-axis load cells. Positional data …
-
Biomechanical Comparison of Traditional Laminectomy and Minimally‑Invasive Facetectomies
… scenarios utilized in this study were the pure moment (PM), combined loading and moment (CLM), and the coupled‑eccentric loading (CEL) protocols. The PM testing protocol is the standard form of biomechanical testing of the spine. The CLM testing protocol introduced compressive and shear …
-
Optimization of Pedicle Screw Depth in the Lumbar Spine: Biomechanical Characterization of Screw Stability and Pullout Strength
… as well as vertebral level and side. A pure moment was applied to each screw head to simulate flexion-extension forces prior to pull out. Ten preliminary and ten post-fatigue cycles were run to determine a specimen-specific displacement range and reduction in angular stiffness of the …