209,958 research outputs found
Letter from J. Tullos Wells to San Antonio Business Leaders: 1995-05-15
No full textLetter from J. Tullos Wells to 12 San Antonio business leaders regarding South Texas Trip. Document includes list of participants.https://scholarworks.utrgv.edu/hcard/1047/thumbnail.jp
Letter from J. Tullos Wells to David E. Allex: 1995-06-19
No full textLetter from J. Tullos Wells to David E. Allex regarding South Texas Border Region Civic Leaders Trip. Document includes suggested itinerary for South Texas tour.https://scholarworks.utrgv.edu/hcard/1050/thumbnail.jp
Georgia, Florida and Alabama
No full textPrime meridians: Washington and Greenwich.; In top margin: left "30", right "McNally's system of geography ; map no. 11"; In bottom margin: left "Drawn by J. Wells N.Y.", right "Eng. by Geo. E. Sherman N.Y."; States colored.; Verso: Exercises relating to Map of Virginia, North Carolina, and South Carolina
Weinstein, Robert J., October 19, 2004 [Interview]
No full textRobert J. Weinstein was interviewed on October 19, 2004, by Nicholas Wells-Bundtzen about his experiences during World War II.World War I
Wells
No full text'WELLS. Engraved by J Greig from an Original Drawing by G Arnald Publish'd Jany,, 1st,, 1802 by J Walker No,, 16 Rosoman Street London'. Above right 'Vol. V. Pl 239'. Accompanied by notes
Wells, Robert J. - An inaugural dissertation on alcohol
No full textHandwritten inaugural dissertation on alcohol by Robert Wells, of Tennessee.Inaugural dissertation; no. 243
Academic Year 1924
No full textYearbook for Mineral Wells High School in Mineral Wells, Texas includes photos of and information about the school, student body, teachers, and organizations
Spin relaxation and carrier recombination in GaInNAs multiple quantum wells
No full textElectron spin relaxation and carrier recombination were investigated in gallium indium nitride arsenide (GaInNAs) multiple quantum wells, using picosecond optical pulses. Pump-probe experiments were carried out at room temperature, using pulses produced by a Ti:sapphire pumped optical parametric oscillator.
The peak wavelengths of the excitonic resonances for the quantum well samples were
identified using linear absorption measurements, and were found to be in the range 1.25µm-1.29µm.
Carrier recombination times were measured for three samples of varying nitrogen content, and were observed to decrease from 548 to 180ps as nitrogen molar fractions were
increased in the range 0.45-1.24%. Carrier recombination times were also measured
for samples which had undergone a post-growth annealing process, and were found to be
signicantly shorter compared to times measured for as-grown samples.
Electron spin relaxation time was investigated for samples with quantum well widths in the range 5.8-8nm, and was found to increase with increasing well width, (i.e. decreasing quantum confinement energy), a trend predicted by both D'Yakonov-Kachorovskii and
Elliott-Yafet models of spin relaxation in quantum wells. In a further study, longer spin relaxation times were exhibited by samples containing higher molar fractions of nitrogen, but having nominally constant quantum well width. Spin relaxation times increased from 47ps to 115ps for samples containing nitrogen concentrations in the range 0.45-1.24%. Decreases in spin relaxation time were observed in the case of those samples which had been annealed post-growth, compared to as-grown samples.
Finally, all-optical polarisation switching based on spin relaxation of optically generated carriers in GaInNAs multiple quantum wells was demonstrated
Helen Clawson Wells tintype
No full textTintype of Harriet Cecelia Jones Morris, maternal grandmother of Helen Clawson Wells, in the late 19th century
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
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