Index Catalog // ScholarsArchive@OSU

Synthesis of metabolites from the ascomycetes : I. The synthesis and absolute configuration of leptosphaerin : II. Approaches to the synthesis of byssochlamic acid

Creator:: Pallenberg, Alexander J.
Abstract:: Part I. The total synthesis of (+)-leptosphaerin (2), a metabolite of the marine Ascomycete Leptosphaeria Oraemaris (Linder) was achieved, unambiguously establishing both the relative and absolute stereochemistry of this natural product. This synthesis also resolved the long-standing question of which of the isomeric structures 1 or 2 correctly represents the...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Alexander J. Pallenberg for the degree of Doctor of Philosophy in

Hybrid computer simulation of wind-driven ocean currents

Creator:: Vithayathil, Francis Joseph
Abstract:: A simulation method using a hybrid computer is developed in this dissertation to enhance the study of wind-driven ocean circulation. The simulation is based on the mathematical model developed by Ekman. Pure digital simulation is not economical due to excessive computer time required for the solution of the partial differential...
Resource Type:: Dissertation
Full Text:: OCEAN CURRENTS Abstract approved: Redacted for privacy Associate Professor Gerald/C. Alexander A

Applications of mathematical programming techniques in optimal power flow problems

Creator:: Li, Ruqi
Abstract:: In the past two decades, a great amount of attention has been paid to investigating the economic and safe operation of power systems using modern mathematical techniques. The classic economic dispatch problem, now often called the Optimal Power Flow problem, has been formulated as a mathematical optimization problem and has...
Resource Type:: Masters Thesis
Full Text:: Ruqi Li ACKNOWLEDGEMENT I am grateful to Dr. G.C. Alexander, my major professor and thesis advisor

Capacitive coupling compensation facilitating single-pole switching on six-phase transmission lines

Creator:: Al-Shehri, Abdallah M.
Abstract:: In this research, a novel shunt compensation scheme design procedure is developed for unbalanced, untransposed n-phase transmission lines. The main function of the scheme is to reduce the effect of the capacitive coupling on untransposed transmission lines to levels where successful single-pole switching is assured. The analysis procedure is carried...
Resource Type:: Dissertation
Full Text:: privacy Abstract approved: Gerald C. Alexander In this research, a novel shunt compensation scheme

Spherical mirror resonators and optical mode selection

Creator:: Adrion, Robert Foisy
Abstract:: This is a review paper based on recent literature in the areas of spherical mirror resonators and optical mode selection. The Fabry-Perot interferometer with spherical mirrors has been widely used as a laser resonator. The modes of oscillation, diffraction losses and resonance condition are determined for the confocal resonator, i.e....
Resource Type:: Masters Thesis
Full Text:: application are satisfield. Therefore, -ik (° -ikr = 27r J u cos (ri, r) ds M1+A+B (1 -2) We can

A signal-processed antenna system and the simulation of the effects of balanced-mixer frequency conversion

Creator:: Spencer, Kenneth Edward
Abstract:: In this paper a signal-processed antenna and receiver system is proposed and analyzed. In addition, a simulation of the balanced-mixer portion of the processing system is made on a hybrid computer to find the bandwidth limitations for the total system. The system utilizes both the amplitude and phase information of...
Resource Type:: Dissertation
Full Text:: OF BALANCED -MIXER FREQUENCY CONVERSION Abstract approved: Gerald C. Alexander In this paper a

Frequency-domain, parameter estimation for a brushless, doubly-fed machine

Creator:: Ramchandran, Ashok
Abstract:: A Brushless, Doubly Fed Machine (BDFM) attempts to combine the advantages of conventional induction and synchronous types of electrical machines by its unique architecture. The validation of BDFM designs in an actual test environment requires the estimation of the BDFM model parameters from actual experimentation. Accurate values for the parameters...
Resource Type:: Dissertation
Full Text:: , Parameter Estimation for a Brush less, Doubly-Fed Machine Abstract apt:a: Ned: Gerald C. Alexander A

Analysis of brushless doubly-fed, stand-alone generator systems

Creator:: Gorti, Bhanuprasad V.
Abstract:: This thesis introduces a Brushless Doubly-Fed Machine (BDFM), stand-alone generator system. Development of a BDFM current-forced model, along with the analysis of air gap power distribution between the two stator windings and the rotor circuit, pave the way for the characterization and analysis of stand-alone generator systems. The main disadvantage...
Resource Type:: Dissertation
Full Text:: : Analysis of Brushless Doubly-Fed. Stand-Alone Generator Systems. Abstract approved: Gerald C. Alexander

Analysis and synthesis of exponentially tapered, nonuniform transmission line impedance transformers

Creator:: David, Frank Kolar
Abstract:: The exponentially tapered, nonuniform transmission' line, applied as an impedance transformer, is analyzed and modified. The analysis develops an expression for the input reflection coefficient that has the magnitude and phase as distinct functions. This allows ease in comparing the approximate and exact solutions and in developing the S-parameters for...
Resource Type:: Masters Thesis
Full Text:: Impedance Transformers Abstract approved: Signet re) (Gerald C. Alexander) The exponentially tapered

A study of the effect of the rotor coil couplings of a synchronous machine on its predicted transient response

Creator:: Nehrir, Mohammad Hashem
Abstract:: The effect of the mutual inductances between the rotor coils of a synchronous machine on its defined reactances and predicted transients are investigated. Two linearized models of the machine are considered. One uses the Laplace-Transform approach, with minimum number of assumptions on the inter-coil couplings, in developing a model for...
Resource Type:: Dissertation
Full Text:: ITS PREDICTED TRANSIENT RESPONSE Abstract approved: Redacted for privacy (Gerald C. Alexander The

ScholarsArchive@OSU

Synthesis of metabolites from the ascomycetes : I. The synthesis and absolute configuration of leptosphaerin : II. Approaches to the synthesis of byssochlamic acid

Hybrid computer simulation of wind-driven ocean currents

Applications of mathematical programming techniques in optimal power flow problems

Capacitive coupling compensation facilitating single-pole switching on six-phase transmission lines

Spherical mirror resonators and optical mode selection

A signal-processed antenna system and the simulation of the effects of balanced-mixer frequency conversion

Frequency-domain, parameter estimation for a brushless, doubly-fed machine

Analysis of brushless doubly-fed, stand-alone generator systems

Analysis and synthesis of exponentially tapered, nonuniform transmission line impedance transformers

A study of the effect of the rotor coil couplings of a synchronous machine on its predicted transient response

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