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 1316 for “"contraction"”.
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Contraction-Expansion Protocols.
… is described. The route is based on a tandem contraction-expansion event in which the contraction triggers the expansion. The two steps involved are a palladium-catalyzed Favorskii contraction and a <em>cis</em>-divinyl cyclopropanone rearrangement. Progress towards these goals is reported.</p>
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Contraction and partial contraction : a study of synchronization in nonlinear networks
… We derives a body of new results, based on contraction and partial contraction analysis. Contraction is a property regarding the convergence between two arbitrary system trajectories. A nonlinear dynamic system is called contracting if initial conditions or temporary disturbances are …
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Inhibition of myofibroblast contraction
… nerve from fully developing. Inhibiting this contraction should thus improve the quality of nerve regeneration. Alpha smooth muscle actin ([alpha]-SMA) is a critical contractile protein. Its expression can be upregulated by the growth factor TGF-[beta]1, and blocked by the pharmacological …
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Information contraction and decomposition
Information contraction is one of the most fundamental concepts in information theory as evidenced by the numerous classical converse theorems that utilize it. In this dissertation, we study several problems aimed at better understanding this notion, broadly construed, within the intertwined realms …
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Modeling vascular smooth muscle contraction
… issues regarding vascular smooth muscle contraction. The overall structure of this thesis consists of (1) a model of single vascular smooth muscle cell membrane electrophysiology, contractile system kinetics and cell mechanics; (2) a model of signal transduction of nitric-oxide induced …
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Contraction analysis of nonlinear systems
This thesis derives new results in nonlinear system analysis using methods inspired from fluid mechanics and differential geometry. Based on a differential analysis of convergence, these results may be viewed as generalizing the classical Krasovskii theorem, as well as linear eigenvalue analysis. …
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Thick filament regulation of myocardial contraction
The ability of the heart to function as a pump is governed by mechanisms intrinsic to individual cardiac myocytes. The experiments in this dissertation were designed to examine the effects of sarcomere length and thick filament protein isoform expression on the contractile properties of single …
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Large contraction conducting polymer molecular actuators
… thesis focuses on two approaches to create large contraction in conducting polymer actuators. The first strategy utilizes polypyrrole (PPy), a conducting polymer actuator material that contracts and expands based on a bulk ion swelling mechanism. Optimization of the polymer activation environment …
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Nonlinear contraction tools for constrained optimization
This thesis derives new results linking nonlinear contraction analysis, a recent stability theory for nonlinear systems, and constrained optimization theory. Although dynamic systems and optimization are both areas that have been extensively studied [21], few results have been achieved in this …
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A control model of muscle contraction
… that are currently thought to cause a muscular contraction. The model is developed with the hypothesis that a series of disturbing signals (or inputs) simply propagate faster than the respective controlling signals can correct for them. Transfer functions for each system are developed, with …
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Expansion and contraction: Goethean polarity and architecture
… of annual plants through cycles of expansion and contraction as opposite sexual forces of natural productivity. This principle forms the foundation of morphology; a unifying science where Goethe applies polarity to formulate ideas on osteology, geology and color. The thesis will be developed in …
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Active Swelling and Contraction in Corn Mitochondria
Made available in DSpace on 2015-05-14T14:56:13Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7105154.PDF: 4286175 bytes, checksum: b201d6784bc072046cece671be69d8da (MD5) Previous issue date: 1970
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Swelling and Contraction of Corn Seedling Mitochondria
Made available in DSpace on 2014-12-10T17:12:24Z (GMT). No. of bitstreams: 1 6507167.pdf: 4696129 bytes, checksum: 2d59178d8223815902ee65c766908218 (MD5) Previous issue date: 1965
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A study of contraction theory and oscillators
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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Regulation of smooth muscle contraction by protein phosphorylation
This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).
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Activation of smooth muscle and theories of contraction
… cyclic, four state model of regulation of contraction of smooth muscle. The model involves twenty one parameters: sixteen rate constants, three initial conditions, and NT$\sb3$ and NT$\sb4$, where N is the number of crossbridges, and T$\sb3$ and T$\sb4$ are the tension of phosphorylated and …
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Nonlinear filtering of video sequences using contraction theory
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.
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Characteristics of muscle co-contraction during isometric tracking
… flexion and extension maximum voluntary contraction effort (MVC, 5 levels) to track the target. Multiple electromyograms (EMGs) of the biceps and triceps muscle groups were taken to observe flexor and extensor activity during the tracking task. Muscle modeling techniques were used to …
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Potential-flow Inflow Model Including Wake Distortion and Contraction
… lack of the effects of wake curvature and wake contraction, and 5.) lack of other important nonlinearities. This thesis uses applications of adjoint theorem, a special change of variable and effective introduction of solution blending to overcome these obstacles. The resultant model is …
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Control of human motoneurones during voluntary contraction and fatigue
… control of human motoneurones during voluntary contraction and fatigue. First, output of motoneurones to corticospinal inputs is described for a wide range of contraction strengths. Results show that motoneurones become less responsive during strong contractions whereas motor cortical output …
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