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Full-Text Articles in Engineering
Computing Optimal Cocomo Effort Multiplier Values And Optimal Casebase Subsets Using Monte Carlo Methods, Robert Joseph Maidhof
Computing Optimal Cocomo Effort Multiplier Values And Optimal Casebase Subsets Using Monte Carlo Methods, Robert Joseph Maidhof
Retrospective Theses and Dissertations
There have been many studies performed and techniques applied to solve the problem of estimating man-month effort for software projects. Despite all the effort expended to solving this problem the results achieved from the various techniques have not been embraced by the software community as very reliable or accurate. This thesis uses Monte Carlo methods to obtain optimal values for COCOMO effort multipliers which minimize the average of the absolute values of the relative errors (AARE) of man-month estimate for two industry supplied casebases. For example, when using three COCOMO cost drivers (complexity, language experience, application experience) and the COCOMO …
Analysis Of Frequency Selective Surfaces With Ferrite Substrates, Youcheng Liu
Analysis Of Frequency Selective Surfaces With Ferrite Substrates, Youcheng Liu
Retrospective Theses and Dissertations
Frequency selective surfaces (FSS) have numerous applications in several microwave and optical systems. Most frequency selective surface structures have one or more dielectric substrates. In this work, instead of traditional dielectric substrates, ferrite substrates are used under different dc bias conditions. By using ferrite materials, one can change the spectral properties of these structures without physically altering them. An applied magnetic field (dc bias) on the ferrite substrate changes its properties and hence the electrical dimensions of the elements comprising the periodic structure. Thus by simply applying a dc bias, the transmission and reflection properties of the periodic structure can …
Approximate Trigonometric Expansions With Applications To Signal Decomposition And Coding, Qurban A. Memon
Approximate Trigonometric Expansions With Applications To Signal Decomposition And Coding, Qurban A. Memon
Retrospective Theses and Dissertations
Signal representation and data coding for multi-dimensional signals have recently received considerable attention due to their importance to several modern technologies. Many useful contributions have been reported that employ wavelets and transform methods. For signal representation, it is always desired that a signal be represented using minimum number of parameters. The transform efficiency and ease of its implementation are to a large extent mutually incompatible. If a stationary process is not periodic, then the coefficients of its Fourier expansion are not uncorrelated. With the exception of periodic signals the expansion of such a process as a superposition of exponentials, particularly …
Cavity Model Analysis Of Microstrip Ring Antennas Using Green's Functions, Javier Gomez Tagle Rangel
Cavity Model Analysis Of Microstrip Ring Antennas Using Green's Functions, Javier Gomez Tagle Rangel
Retrospective Theses and Dissertations
Microstrip ring antennas have been experimentally tested by several researchers due to their specific radiation characteristics that make them very suitable for many applications, from medical uses to mobile communications. Ring antennas have been found to have a larger bandwidth compared to other conventional types of microstrip patch antennas. Further more, their size is smaller when compared to circular and rectangular resonant structures. The TM1m modes (m = 2,4,6 .. , where m represents radial variations) radiate conical beams in the broadside direction, while TM nl modes (n = 2,4,6 .. , where n represents azimuthal variations) have a radiation …