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 3854 for “"Ring"”.
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Brass Ring
Screenplay
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The ring opening polymerization of ring strained cyclic ethers
The kinetics and mechanisms of the ring-opening polymerization of oxetane were studied using cationic and coordinated anionic catalysts. The cationic initiators used were BF30Et2!/ethanol, BF30Et2!/ethanediol and BF30Et2/propantriol. Kinetic determinations with the BF30Et2/diol system indicated …
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Spectral Studies in Medium-Ring and Large-Ring Carbocyclic Compounds
Made available in DSpace on 2014-12-05T19:36:51Z (GMT). No. of bitstreams: 1 5801726.pdf: 4323012 bytes, checksum: 1d708712939bd0e91bd3e13e57af6c7c (MD5) Previous issue date: 1958
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The classifying ring of groups whose classifying ring is commutative.
Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Mathematics.
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Piston ring friction
… of Technology, Dept. of Mechanical Engineering, 1982.
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Noncommutative ring spectra
Let A be an Ax ring spectrum. We give an explicit construction of topological Hochschild homology and cohomology of A using the Stasheff associahedra and another family of polyhedra called cyclohedra. Using this construction we can then study how THH(A) varies over the moduli space of AO structures …
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Deniable Ring Signatures
Ring Signatures were developed by Rivest, Shamir and Tauman, in a paper titled How to Leak a Secret, as a cryptographically secure way to authenticate messages with respect to ad-hoc groups while still maintaining the signer's anonymity. While their initial scheme assumed the existence of random …
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Abnormal Ring Expansion and Ring Opening Reactions of Polycyclic Aziridinium Salts
Made available in DSpace on 2014-12-09T17:36:46Z (GMT). No. of bitstreams: 1 7020952.pdf: 2995112 bytes, checksum: 8e7ee1ff79eda4f26fde61893c1977a3 (MD5) Previous issue date: 1970
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The third inguinal ring
… in uinal riz . This presents the form of. a ring in 5O of cases, and the shape of a funnel in the remaining cases. it is of vast importance in connection with imperfect .descent of the testis. It is easily felt clinically. (7) No evidence has been forthcoming in this research which lends the …
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Palladium assisted ring closures
… variety of cyclopentanoids. Extensions to larger ring systems yielded unstable palladium complexes. These complexes underwent oxidation at the amine functionality upon warming. Hydrolysis of the intermediate complexes yielded cyclohexyl and cycloheptyl aldehydes whereas reduction with hydrogen in …
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Effect of ring tension, face width, and number of rings on piston ring friction
… Dept. of Naval Architecture and Marine Engineering, 1951.
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Liquefaction and ring shear device
… a more sophisticated machine is necessary: the ring shear device (RSD). The RSD is designed to apply a horizontal shearing stress (cyclic or monotonic) to a ring-shaped granular soil sample. This permits the application of very large total strains and controlled strain rates to the specimen. An …
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Chemistry of fused-ring iridabenzenes
… class. However, examples where additional fused rings are attached to the metallabenzene core are scarce and the chemistry of these `fused-ring metallabenzenes' is only just beginning to be explored. The work described herein sought to contribute to our understanding of these intriguing …
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Units of Equivariant Ring Spectra
We then define the units of equivariant spectra in terms of equivariant Gamma-spaces. Thus showing that units of equivariant spectra are equivariant spectra.
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Ring Closures With 2,2'-Biphenylenedilithium
Made available in DSpace on 2014-12-05T19:37:43Z (GMT). No. of bitstreams: 1 6104248.pdf: 2987921 bytes, checksum: fc206efc2c6196482f1ea79ac92100c5 (MD5) Previous issue date: 1961
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Reversible concentric ring microfluidic interconnects
… uses two sets of concentric, interlocking rings with trapezoidal cross sections to form a fluid seal without the use of gaskets or sealants. Results from analytical and finite element models indicate good sealing capability. Macro scale devices show that the interconnects function as …
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Factors affecting piston ring friction
The piston ring pack friction is a major contributor to the internal combustion engine mechanical friction loss. The oil control ring decides the oil supply to the top two rings in addition to being the major friction contributor in the ring pack. This work concentrated on the oil control ring …
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