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.
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Showing 1 to 20 of 43 for “"jammed"”.
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Energy propagation in jammed granular matter
… that at least for the dense, compressed, jammed systems considered here, mathematical description of energy propagation based on a simple continuum model is possible. The simulation is then extended to consider the process of impact of a large- scale intruder on a granular system. In this …
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Order and Asymmetry in Jammed Systems
<p>Granular matter is composed of particles that are big enough that thermal effects may be neglected. We studied both granular flow and granular statics using numerical simulation. In granular flow, we simulated 2D granular flow in a hopper. A hopper is a container with an opening at the bottom. …
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Mechanics of jammed media used as a structural element
… the force applied. Using vacuum to apply stress, jammed media can be used to create easily reconfigurable structural elements. The analysis of such a structural element is very similar to analyses done in soil mechanics where the "strength" of the soil depends on the stress applied, the rate of …
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Controlling Cocontinuous Polymer Blends with Nanofillers Jammed at the Interface
… morphology, nanofillers have been localized and jammed at the interface as an effective method to suppress the coarsening and stabilize the cocontinuous structure during annealing. However, the mechanisms involved in the morphology stabilization by interfacial nanofillers are not yet fully …
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Energy dissipation mechanisms during impact in jammed ductile granular media
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01
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Power allocation of multi-rate transmissions over a jammed broadcast channel
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Rammed, jammed and bifurcated : the convergence and divergence of intellectual property and competition policy in the digital environment
rammed, jammed & bifurcated: the convergence and divergence of intellectual property and competition policy in the digital environment This thesis is directed to the intersection between intellectual property (IP) and competition policy in the digital environment. The policy debate to which this …
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In danger of jammed minds: A deconstructive discourse analysis of the criteria for early onset schizophrenia and imagination in children's literature
The purpose of this research is to expose and complicate those discourses of childhood imagination as demonstrated in the diagnostic criteria for early onset schizophrenia by using an antipsychiatry perspective. This will be done by evaluating those discourses alongside those found in popular …
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On the complexity of energy landscapes: algorithms and a direct test of the Edwards conjecture
… entropy of two and three-dimensional jammed packings. By means of numerical simulation we show the extensivity of the granular entropy as proposed by S.F. Edwards for three-dimensional jammed soft-sphere packings and produce a direct test of the Edwards conjecture for the equivalent …
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A Novel Fiber Jamming Theory and Experimental Verification
… beam and deflected 10mm in both the un-jammed (soft) and jammed (stiff) states. When the three design parameters were held constant, the performance of the chamber was consistent within 10\%. In contrast, when the parameters were altered, there was a statistically significant $p < .0001$ …
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Machine Learning-based GPS Jamming and Spoofing Detection
… signals. The study implements the generation of jammed and spoofed signals to emulate potential threats faced by GPS receivers in practical settings. The core innovation lies in the integration of machine learning techniques to detect and differentiate genuine GPS signals from jammed and spoofed …
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Measurements of dynamics in an orientationally anisotropic system
… by a surface-aligned, nonequilibrium, "jammed" phase as the concentration of rods was further increased.
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Mechanical characterization of jammable granular systems
… mechanical properties and material selection for jammed systems has not been reported. Glass beads of differing size distributions, silica blasting media, sand, and ground coffee were tested under different vacuum pressures in a procedure similar to an unconsolidated-undrained triaxial compression …
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Recycling baler material properties for safer baler operation
… cardboard (Taylor, 2002). Balers often become jammed while the baling process is occurring, and the only way to remove the jam is manually. This requires an employee to place a limb of their body into the jamming area and remove the material that is causing the jam. While lockout and tagout …
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A Confocal Rheology Study of Network Stabilized Bicontinuous Emulsion Gels
… material was discovered. Bicontinuous intraphase jammed emulsion gels (bipjels) were formed from critical mixtures of water and 2,6-lutidine and were stabilized with commercially produced alumina coated silica nanoparticles. Using a novel confocal rheology platform, the microstructure and …
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Alibi framework for identifying insider jamming attacks in half-duplex wireless local area networks
… a send or receive action at the same time of the jammed packet, it can arguably prove that it cannot be the cause of the jammed packet. In other words, the honest node obtains an ""alibi"". Alibi is ""a form of defense whereby a defendant attempts to prove that he or she was elsewhere when the …
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Self-organization of Microtubule and Associated Protein Map65
… and show that these are homogeneous and jammed inside. Lastly, I present results of the MAP65 condensate formation via liquid-liquid phase separation and quantification of their properties. Additionally, I elucidate a mechanism of non-centrosomal microtubule nucleation that may play an …
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Non-Equilibrium Pattern Formation in Multi-Species Interacting Particle Systems
… to the drive, which coexist with transient jammed clusters where particles are temporarily immobilized. We analyze the interplay between these two types of non-equilibrium pattern formation, including their implications for macroscopic demixing perpendicular to the drive. Finite-size scaling …
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Plasticity as a depinning phase transition
… ( ow) stress, the dislocations are pinned/jammed within their glide plane due to long-range elastic interactions and the material exhibits plastic response. Above this critical stress the dislocations are mobile (the depinned/ unjammed phase) and the material constantly ows. We employ …
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Design and analysis of jammable granular systems
… granular properties affect the performance of jammed systems, and at a more applied level of designing functional robotic components. Specifically, the purpose of this thesis was to enable engineers to design jammable robotic systems in a principled manner. Three parallel yet related studies …
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