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 39 for “"Dynamic Instability"”.
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Dynamic instability of composite laminated plates
Dynamic instability in a laminated composite plate is studied using the finite element technique. The governing equations are derived based on the first order shear deformation theory with a linear strain-displacement relationship. The regions of instability for the resulting set of coupled Mathieu …
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Mechanisms and regulation of ATP-dependent, steady state actin subunit exchange: Concurrent treadmilling & dynamic instability
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Mechanistic Analysis of Microtubule Dynamics and Regulation
… underlying behavior of microtubules, known as dynamic instability. Dynamic instability, the rapid switch between growing and shrinking states of the microtubule, depends on the functional GTPase behavior of the microtubule polymerizing subunits, αβ-tubulin. Recent studies have noted the …
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Recombinant αβ-Tubulin and a Simple Computational Model Shed Light on the Molecular Mechanisms of Microtubule Dynamics
… that exhibit a non-equilibrium behavior called dynamic instability: the stochastic switching of single polymers from a state of gradual growth to one of rapid disassembly. Dynamic instability underlies the MT cytoskeleton's rapid reorganizability and enables its diversity of functions. MTs can …
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Nonlinear vibration energy harvesting by intentional excitation of high-frequency dynamical instability
… single or repeated impulsive input, the damped dynamics of this system exhibit transient resonance captures (TRCs) causing large-amplitude, high-frequency instabilities in the response of the NES. These TRCs result in strong energy transfer from the directly excited primary system to the …
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Dynamic instabilities in a system with geometrically nonlinear damping and stiffness
The dynamics of a system of coupled oscillators possessing strongly nonlinear stiffness and damping is examined. The system consists of a linear oscillator coupled to a strongly nonlinear, light attachment, where the nonlinear terms of the system are realized due to geometric effects. It is shown …
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Structure-Based Mechano-Chemical Modeling of Microtubule Nucleation
… MTs, and 2) γ-tubulin ring complexes (γTuRCs) – dynamic templates that must undergo closure to become tubelike. While nucleation from seed MTs is the foundation of the process, nucleation from γTuRCs involves additional complexity. The underlying mechanisms in both cases have remained elusive. …
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Forces Are Able to Set Position And Timing Of Microtubule Catastrophes In Fission Yeast
… five different models of how microtubule dynamic instability might be regulated in order to reproduce the organization of microtubules observed in vivo. To evaluate the simulations we compared their output to nine traits of interphase cells. Using the simulation we could show that the …
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Self Balanced Bare Electrodynamic Tethers. Space Debris Mitigation and other Applications
The research on electrodynamic tethers (EDT) has been a fruitful field since the 70’s. This technology has been developed thanks to both theoretical studies and demonstration missions. During this period, several technical issues were identified and overcome. Among those problems, two of them would …
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Examining Mechanisms Regulating Microtubule Assembly and Function
… these diverse contexts depends on the assembly dynamics of microtubules and their organization into specialized arrays. Both intrinsic factors including the tubulin isotype composition of microtubules and extrinsic factors including microtubule-associated proteins (MAPs) can impact microtubule …
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Dynamics of Cilia and Flagella
… waves emerge from a non-oscillatory state via a dynamic instability. The corresponding beat patterns are solutions to a set of coupled partial differential equations presented herein.
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Reduced Order Modeling of a Rocket Engine Turbopump Inducer for Assessment of Pogo Instability
… of these flow oscillations is so-called "pogo instability", in which dynamic instability arises from the interaction of vehicle structural dynamics with thrust oscillations of a liquid fueled propulsion system. These thrust oscillations are a result of the pressure fluctuations that originate …
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Stochastic prediction of collapse of building structures under seismic excitations
… Despite recent advances in static and dynamic nonlinear constitutive modeling of such structures, accurate prediction of structural collapse with systematic incorporation of uncertainty still remains a question, especially for structural evaluation and design of actual structures. The …
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Prediction of Handling Qualities Deficiencies for Advanced Air Mobility Aircraft
… handling qualities cliffs due to factors such as dynamic instability and pilot-in-the-loop effects is very limited. The second methodology displays the aircraft’s flight envelope in real time to the pilot as a function of the aircraft’s state and displays the location of the aircraft with respect …
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The Substrate and Regulator of Acetyltransferase San
… building blocks of microtubules, which display dynamic instability. By regulating the rate of microtubule assembly and disassembly, cells organize the microtubule cytoskeleton to accommodate their specific functions. Posttranslational modifications of tubulin have been implicated in regulating …
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Quantifying Dynamic Stability of Musculoskeletal Systems using Lyapunov Exponents
… are not appropriate for quantifying stability of dynamic systems. Response of biological control systems depend on both temporal and spatial inputs, so means of quantifying stability should account for both. These studies utilized tools developed for the analysis of deterministic chaos to quantify …
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Modelling the formation of ordered acentrosomal microtubule arrays
… We find that a tubulin concentration dependent dynamic instability is not a good�fit to this hypothesis but that a reduced centrosomal nucleation rate in response to an increased number of side wall microtubules makes the hypothesis work in biologically reasonable conditions. We propose that the …
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The human Deleted in Azoospermia gene family : structure, function and evolution
… This thesis uncovers the genomic complexity, dynamic instability and evolution of a Y chromosomal gene family that is important for its role in human male fertility.
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Physical Concepts of Copolymerization of Microtubules in the Presence of Anti-mitotic Agents
… of having analytical steady state solutions of dynamic equations is investigated. The structure of equations is narrowed down for the specific brand of anti-mitotic drug, colchicine. The behavior of total T-tubulin concentration in the steady state in a regeneration system is investigated and …
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Physical Aspects of Min Oscillations in Escherichia Coli
… proteins. Oscillatory solutions appear via a dynamic instability of the homogenous protein distributions. Moreover, we perform stochastic simulations based on a microscopic description, whereby the probability for each event is calculated according to the corresponding probability in the …
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