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Strip mining regulatory politics : the case of OhioMcClain, Thomas E January 2010 (has links)
Digitized by Kansas Correctional Industries
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Plant extraction of phosphorus and potassium from reclaimed strip-mined soils in KansasVoth, Richard D January 2010 (has links)
Digitized by Kansas Correctional Industries
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The development and application of the finite element method and finite strip method in engineering analysis / by Yau Kai CheungCheung, Yau Kai January 1978 (has links)
2 v. : / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (D.E.)--Dept. of Electrical Engineering, University of Adelaide
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Quasi-static design of electro-optic modulators by the method of linesMyers, Robert A. (Robert Allan), 1962- 07 September 1990 (has links)
Coplanar microstrip structures placed on dielectric substrates
are used as high frequency electro-optic modulators. The method of
lines, a mathematical technique for solving partial differential
equations, has been applied to solve for the propagation
characteristics of such a configuration.
It has been determined that simple transmission line models
are adequate to describe this system. The propagation
characteristics are expressed in terms of the equivalent impedance
and the phase velocity of the signal on the microstrip. In order to
maximize the effective bandwidth of the modulator, the impedance is
matched to that of the surrounding dielectric substrate, and the
difference in the phase velocities of the two signals is minimized.
The numerical technique developed here allows for the analysis
of inhomogeneous dielectric substrates, so that trench structures for
tuning the propagation characteristics to their desired values can be
modelled.
The numerical results for typical structures are presented, and
suggest that the method of lines is a viable one for analyzing these
modulator structures. / Graduation date: 1991
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Analysis of interacting discontinuities in microstrips by mode-matching techniqueKapoor, Sunil 31 July 1992 (has links)
In this thesis a numerical technique to model general microstrip asymmetric and
multiple step discontinuities is presented. The method is based on a magnetic wall
waveguide model that is assumed to be valid for describing the electromagnetic fields
associated with the microstrip line and in the vicinity of microstrip discontinuities.
The fields are expanded in the uniform regions and the mode-matching method is
applied at the discontinuities to analyze for the frequency dependent transmission
properties of the multi ports. The generalized scattering matrix technique is used to
model cascaded interacting discontinuities and is used to compute the properties of
double-step and multi port structures. The generalized scattering matrix formulation
takes into account the scattering phenomena of the dominant and all of the higher-order
modes including evanescent ones.
The validity of this model has been discussed extensively, and it is shown that the
model can be used to describe the microstrip discontinuities with acceptable
accuracy. The technique is applied (1) to study the transmission characteristics of
asymmetric step discontinuities; (2) to design a filter for a desired frequency range
using interacting asymmetric double step micros trip line; and (3) to design a new
nominal 3db power devider of large bandwidth consisting of a three port rectangular
patch. The techniques and models presented can be used in computer-aided analysis
and design of such circuits. / Graduation date: 1993
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Inverse Analysis for Estimating Friction Coefficient in Strip RollingLin, Chih-Pin 26 August 2003 (has links)
Abstract
The rolling is an efficient and economical approach for the manufacturing of strip or plate metals, it plays an important role because of its versatility and its high production rate in the manufacture of various products with uniform cross-sectional area. Without the knowledge of the influences of the variables such as friction conditions, material properties, and workpiece geometry on the process mechanics, it will not be possible to design and control the equipment adequately, or to predict and prevent the occurrence of failures.
According to modeling by numerical has become a major tool in rolling research. By using the proper criterion, de-pending upon the production requirements along with the modeling results, the process efficiency, productivity and quality can be increased and the down time of the mill and cost operation can be reduced.
In this study, investigated that it do not consider to work hardening and consider to work hardening during the rolling process from Von Karman theory. We can realize friction coefficient, reduction ratio, rolling force, rolling torque, neutral point, and pressure distribution relation, then from measuring rolling force, torque, neutral point can inverse to solve friction coefficient and pressure distribution. Result that we found the error of direct and inverse solution about rolling friction coefficient was less than 5 %, and the coef-ficient of friction was found to increase with reduction and rolling force and neutral point.
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Circuit models for a millimeter-wave suspended-microstrip line discontinuityJin, Won Tae. January 1990 (has links) (PDF)
Thesis (M.S. in Systems Engineering (Electronic Warfare))--Naval Postgraduate School, September 1990. / Thesis Advisor(s): Atwater, Harry A. Second Reader: Janaswamy, Rama. "September 1990." Description based on title screen as viewed on December 29, 2009. DTIC Identifier(s): Suspended striplines, microstrip lines, equivalent circuits, program listings, theses. Author(s) subject terms: Suspended-microstrip line, step discontinuity, equivalent circuit model, step-change. Includes bibliographical references (p. 60). Also available in print.
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A novel compact microstrip type composite right/left handed transmission line (CRLH TL) and its applications /Wong, Man Fai. January 2009 (has links) (PDF)
Thesis (M.Phil.)--City University of Hong Kong, 2009. / "Submitted to Department of Electronic Engineering in partial fulfillment of the requirements for the degree of Master of Philosophy." Includes bibliographical references.
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Analyses of coal extraction and spoil handling techniques in mountainous areasKolli, Shiva Prasad B. January 2001 (has links)
Thesis (M.S.)--West Virginia University, 2001. / Title from document title page. Document formatted into pages; contains x, 64 p. : ill. (some col.), maps. Includes abstract. Includes bibliographical references (p. 63-64).
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Electric probe measurements on microstrip circuits.Dahele, Jashwant Singh, January 1979 (has links)
Thesis--Ph. D., University of Hong Kong, 1979.
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