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 2918 for “"opening"”.
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Opening
… of non-violent communication. This change is an opening to new beginnings. Opening expresses this concept through iconography, the use of symbols, which opens an internal and external dialog with the viewer, through incorporating text, and through portraits of contemporary leaders who are devoted …
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Opening innovation procurement
Public procurement plays a vital role in stimulating sustainable and inclusive European growth through innovation. Moving beyond primary goals of service improvement and cost reduction, innovation procurement practices of public agencies can pursue secondary goals such as innovation and …
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Opening the Heart
It is my discovery of the mandala that has had the most significant influence on me as an artist. The mandala, Sanskrit word for circle or center, is found in a majority of my pieces, either literally or symbolically. My interest in and subsequent use of the mandala began twenty years ago and …
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A counterpulsed, solid-state opening switch
… A solid-state device in a counterpulsed opening switch configuration is a possible solution. A demonstration counterpulsed solid-state opening switch was constructed and successfully tested. This circuit consisted of Silicon Controlled Rectifier components, which can nominally only turn …
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Finite Opening of Propagating Shear Cracks
… Gao (2000) showed that there was finite crack opening when the crack propagated at a sub-Rayleigh speed while the crack opening became negligible when the crack propagated faster than the shear wave speed. On the other hand, the classical linear dynamics theory predicted that there was no crack …
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Self-Condensing Ring-Opening Metathesis Polymerization
Ring-opening metathesis polymerization (ROMP) is a great tool for synthesizing polyolefin materials with different topologies, including hyperbranched polymers—polymers with high degrees of branching and many end groups. However, hyperbranched polymer synthesis via ROMP is challenging due to …
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Effect of opening size on the effectiveness of a noise enclosure on the side facing the opening
… There are methods to predict the effects of openings, but those methods are largely untested in real enclosures. This study investigated the effects of hole size (0%, 0.024%, 0.379%, 0.675%, 1.492%,and 5.063%) at a distance of 5 feet (1.524 m) in a 96 inch (2.46 m) x 37 inch (0.94 m) x 31 …
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OPENING NEW CHEMICAL SPACE IN DRUG DISCOVERY
Small molecules have always been of interest in chemistry and biology because of their ability to exert powerful effects on the functions of macromolecules comprising living systems. Screening collections or libraries of small molecules is the most common way to identify new chemical modulators of …
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The Ring-opening Polymerisations of Cyclic Olefins
The ring opening polymerisations of cyclic olefins were investigated using a catalyst system of tungsten hexachloride and aluminium tri-isobutyl. The cyclic olefins investigated were cyclooctene and cyclopentene. The monomers were purified and attempts were made to remove conjugated dienes that …
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Curved Beam Theory Applied to Opening Design
Made available in DSpace on 2014-12-10T17:57:38Z (GMT). No. of bitstreams: 1 6408344.pdf: 5451738 bytes, checksum: ef2696f2d786cca6e7aaf75e5f174df6 (MD5) Previous issue date: 1964
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Endo-selective epoxide-opening cascades in water
… biogenesis. Cascades of endo-selective epoxide opening inspired by the biosynthetic proposal and promoted by simple neutral water can provide efficient access to these compounds. Chapter II. Water-Promoted Epoxide Opening Accommodates Methyl Substitution. ... Methyl (Me) substitution poses a …
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Force Feedback for Reliable Robotic Door Opening
Opening a door is still a hard problem in robotics. Many robotic manipulators use open-loop position control to open doors, which reduces reusability and reliability in the face of slight differences or sensor errors. Many others use force feedback or impedance control but skip past the problem of …
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Borinic Acid-catalyzed Ring-opening of Epoxy Alcohols
… has been used by our group to effect ring-opening and rearrangement reactions of 2,3-epoxy alcohols via reversible borinate ester formation. This work focuses on expanding the mode of borinic acid catalysis to the activation of 3,4-epoxy alcohols for regioselective ring-opening reactions …
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Metal-Free Photoredox-Mediated Ring Opening Metathesis Polymerization
Metal-free, photoredox-mediated ring-opening metathesis polymerization (MF-ROMP) is a novel approach to the synthesis of ROMP polymers. Whereas traditional, metal-mediated ROMP uses well-defined transition metal-alkylidene initiators in stoichiometric amounts, MF-ROMP uses a photo-oxidant to …
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Opening a World From Categorial Intuition to Art
My purpose, broadly construed, is a simple one; to interpret Heidegger's "The Origin of the Work of Art" in the light of his early work on the nature of phenomenology and philosophy. My method will therefore be to present certain key elements of Heidegger's early understanding of phenomenology and …
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Opening the Black Box: Understanding Adult Inpatient Falls
<p>Within the United States, falls are the largest category of adverse events reported in hospitals. Injuries associated with falls include increased costs, extended length of stays, increased mortality and morbidity, and liability to hospitals. The purpose of this study was to discover, describe, …
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Studies on the Ring Opening Polymerisation of Cyclopentene
This work describes investigations on the initiation and the propagation of the polymerisation of cyclic alkenes catalysed by tungsten based systems. Cyclopentene was polymerised using the bimetallic WCl₆/Al(iBu)₃ catalyst and infra-red spectroscopy showed that trans-polypentenamer was formed. A …
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