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Yttria Stabilized Zirconia Buffered Silicon: Substrates For Ybco Microwave Applications, Philip D. Brown
Yttria Stabilized Zirconia Buffered Silicon: Substrates For Ybco Microwave Applications, Philip D. Brown
FIU Electronic Theses and Dissertations
The use Yttria-Stabilized Zirconia (YSZ) as a buffer layer for YBa2Cu3O7-x (YBCO) thin films on (100) silicon (Si) substrates is investigated. YSZ was grown using on-axis pulsed D.C. (PDC) and R.F. magnetron sputtering from a 99.9% pure YSZ target [(Y2O3)0.08(ZrO2)0.92]. Sputtering was carried out in Argon/Oxygen atmosphere at total pressures ranging from 6 to 320 mTorr containing 0.1 to 10% Oxygen. Substrate temperatures were varied from 300° C to 900° C. (111), (100) and mixed (100) and (111) oriented YSZ films were produced …
Adaptive Segmenting Of Non-Stationary Signals, Christopher Albin Edmonds
Adaptive Segmenting Of Non-Stationary Signals, Christopher Albin Edmonds
FIU Electronic Theses and Dissertations
Many data compression techniques rely on the low entropy and/or the large degree of autocorrelation exhibited by stationary signals. In non-stationary signals, however, these characteristics are not constant, resulting in reduced data compression efficiency. An adaptive scheme is developed that divides non-stationary signals into smaller locally stationary segments, thereby improving overall efficiency. Two principal issues arise in implementing this procedure. The first is practical; an exhaustive search of all possible segmentations is in general computationally prohibitive. The concept of dynamic programming is applied to reduce the expense of such a search. The second involves choosing a cost function that is …
Degradation Of Azo Dyes In Aqueous Solution By H2o2/Fe2+ And H2o2/Fe, Sangeeta Dhulashia
Degradation Of Azo Dyes In Aqueous Solution By H2o2/Fe2+ And H2o2/Fe, Sangeeta Dhulashia
FIU Electronic Theses and Dissertations
An advanced oxidation process, which uses Fenton's Reagent (H2O2/Fe2+), is studied in the destruction of three different classes of azo dyes. The optimal pH and stochiometry for H202 and Fe2+ in the oxidation of the azo dyes were investigated; an experimental optimal ratio was also compared to a theoretical optimal ratio of H202 to Fe2+. The optimal oxidation of monoazo and disazo dyes is at pH 3 and pH 4, respectively. The optimal ratio for monoazo and disazo dyes ranged from 1 to 10. The …