In this thesis, the numerical solution of the problem of minimizing a unimodal function f(a) is considered, where a is a scalar. Two modifications of the cubic interpolation process are presented, so as to improve the robustness of the method and force the process to converge in a reasonable number of iterations, even in pathological cases. Modification ...

The goal of this thesis is to take into account the gain saturation that occurs within pulse duration for actively node-locked lasers and to discuss its effects on the generated pulses. The population inversion, obtained analytically using a perturbation scheme, has been found to vary considerably within pulse envelope. An assumingly Gaussian pulse ...

The multiplicative intensity model for the intensity function u(t;N(t);w) = v(t)r(t - of a self-exciting point process is analyzed in terms of the distortion of v(t) by the channel r(x). A convenient and common method of presenting point process data, the Post Stimulus Histogram is shown to be related to the ensemble average of the intensity process ...

Cold silicon and germanium clusters have been produced in a supersonic molecular beam by laser vaporization of a silicon or germanium rod. The cluster beam is characterized by laser ionization studies and time of flight mass analysis. Both large Si and Ge clusters are found to have similar fragmentation patterns. They fisson into stable subunits ...

The problem of designing recursive digital filters for a particular case, that is, when some of the filter poles are prespecified, is considered. A modified version of the original Prony method is developed for the design of such filters. The procedure is very general and is applicable for any number of prespecified poles. An error analysis for the ...

Conventional non-invasive mechanical circulatory assist methods such as intra-aortic balloon pumping are of little effectiveness in cases of severe ventricular failure. The proposed study is concerned with the development and testing, on a mock circulatory loop and in a series of dog experiments, of an automated combined assist system for the profound ...

Since its inception, the concept of network coordinates has been successfully applied to solve a wide variety of problems such as overlay optimization, network routing, network localization, and network modeling. Despite these successes, several practical problems limit the benefits of network coordinates today. First, the Triangle Inequality ...

A study was made of trîode sputtered thin films of Hg. Cd Te to determine their physical, electronic, and electrooptic characteristics. The films were sputtered from inhomogeneous targets made from HgTe enriched Hg CdTe onto glass substrates. The composition of the films was determined by electron microprobe. Electrical characteristics were determined ...

This paper deals with the classical forward and inverse volume conductor field problems associated with the isolated active cardiac strand. The Purkinje fiber and the atrial trabeculum are chosen as specific examples of cardiac tissue that may be well modeled by cylindrical geometry. The electrical behavior of these strands is modeled in terms of the ...

Single-event upsets (SEUs) induced by high-energy neutrons and alpha particles have emerged as a key reliability threat to advanced commercial electronic components and systems. This dissertation describes gate-level radiation hardening techniques to improve the reliability of combinational circuits to SEUs. Such techniques have several advantages ...