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caltechETD 檢索結果共 5156 筆,本頁資料從第 169 筆到第 180 筆

Detonation interaction with an interface was investigated, where the interface separated a combustible from an oxidizing mixture. The ethylene-oxygen combustible mixture had a fuel-rich composition to promote secondary combustion with the oxidizer in the turbulent mixing zone that resulted from the interaction. Both sharp and diffuse interfaces were studied. Diffuse int....

By Daniel Howard Lieberman--California Institute of Technology--2005-11-11
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When exposed to stellar UV radiation, chemical processes will be governed not only by temperature/pressure but also the spectrum of the incoming dissociative photon flux; the system will approach kinetic, or photochemical, equilibrium, instead of thermochemical equilibrium. Over the previous decades, photochemistry has proven to be a powerful tool for predicting the che....

By Mao-Chang Liang--California Institute of Technology--2005-11-07
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Optical microresonators have historically been perceived as structures that could efficiently confine optical energies. This is due to their exceedingly low losses at optical frequencies. This thesis has, for the first time, explored these structures in a starkly different frequency range. Optical microcavities like any other structure have mechanical eigenmodes or reso....

By Hossein Rokhsari Azar--California Institute of Technology--2005-11-02
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Age and disease can cause changes in the mechanical properties of ocular tissues, which compromise visual acuity and can lead to blindness. Thus, there is great interest in understanding the mechanical properties of ocular tissues and in developing appropriate therapeutic strategies. The goal of this thesis is to discover and manipulate the molecular mechanisms that det....

By Charles Sellers Nickerson--California Institute of Technology--2005-11-01
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Tholins are brownish, sticky residues formed by the energetic processing of mixtures of gases abundant in the cosmos, such as CH4, N2, and H2O, either with ultraviolet light or electrical discharge. This thesis describes investigations of the tholins produced by the processing of mixtures of N2 and CH4, as a model of photochemical processes occurring in the atmosphere o....

By Robert Hodyss--California Institute of Technology--2005-11-01
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The first total synthesis of (â)-lemonomycin has been accomplished. The synthesis features a novel, auxiliary-controlled asymmetric dipolar cycloaddition, a highly convergent Suzuki coupling, a diastereoselective enamide hydrogenation to set the C(3) stereochemistry, and a convergent, efficient, and completely diastereoselective Pictet-Spengler cyclization with a glyco....

By Eric Robert Ashley--California Institute of Technology--2005-10-31
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The information theoretic aspects of large networks with many terminals present several interesting and non-intuitive phenomena. One such crucial phenomenon was first explored in a detailed manner in the excellent work by Ahlswede at al. It compared two paradigms for operating a network -- one in which interior nodes were restricted to only copying and forwarding incomi....

By Sidharth Jaggi--California Institute of Technology--2005-10-28
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Traditional techniques of polymer synthesis produce macromolecules with statistical distributions of chain length, composition, stereochemistry, and sequence. Nature has evolved a complex system for polypeptide synthesis that gives essentially complete control of chain length and monomer sequence. Using the natural protein biosynthesis machinery to produce protein polym....

By Marissa Mock--California Institute of Technology--2005-10-21
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Towards the goal of kinetic resolution of chiral olefins, a series of enantiopure C1 symmetric metallocenes has been synthesized for use in the polymerization of chiral olefins. The new precatalysts were based on the parent precatalyst {(SiMe2)2[[eta]5-C5H(CHMe2)2][[eta]5-C5H2((S)-CHMeCMe3)]}ZrCl2, (S)-2, which has a doubly, silylene-linked ligand framework. The new pre....

By Endy Yeo-Jung Min--California Institute of Technology--2005-10-18
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A measurement of the angular correlation between the neutron spin and the direction of emission of the electron in polarized neutron decay (the "A" asymmetry), when combined with results from the neutron lifetime, provides a determination of the Cabibbo-Kobayashi-Maskawi (CKM) matrix element Vud. The value of Vud determined from neutron beta decay can also be compared w....

By Junhua Yuan--California Institute of Technology--2005-10-03
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The formation of and passivation by alkyl monolayers on Si(111) and Si(100) surfaces was studied. Crystalline Si(111) and Si(100) surfaces were alkylated in a two-step chlorination/alkylation process using both straight chain alkyl groups CH3, C2H5, C4H9, and C8H17, as well sterically bulky alkyl groups such as (CH3)2CH-(iso-propyl), (CH3)3C-(tert-butyl), and C6H5-(phen....

By Eric Joseph Nemanick-Chemistry-California Institute of Technology-doctoral-2005-09-22
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Microwave integrated systems in silicon provide a low cost, low power and high yield solution for wideband data communication, radar, and many other applications. Phased-array systems are capable of steering the radiation beam by electronic means, emulating the behavior of a directional antenna. This dissertation is dedicated to presenting various techniques to implemen....

By Xiang Guan-Electrical Engineering-California Institute of Technology-doctoral-2005-09-22
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