Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 467 for “"brightness"”.
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Spectroscopic surface brightness fluctuations
… second part I develop the new method of surface brightness fluctuation spectroscopy and quantitatively explore its potential to investigate the bright evolved stellar population. Measuring the kinematics of NGC 5102 I discover that this low-luminosity S0 galaxy hosts two counter rotating discs. …
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AREA-INTENSITY RELATIONSHIPS AND BRIGHTNESS
<p>The change in brightness due to an increase in the size of a test stimulus is termed spatial (areal) summation. The aim of the present research is to quantify spatial summation effects for a large range of stimulus sizes at two suprathreshold luminance levels and two stimulus presentation …
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The night sky brightness of Gozo
… aim of this project was to carry out Night Sky Brightness measurements in Gozo, with a view to comparing with data collected between 2017 and 2018. Current studies have shown that light pollution is on the increase. This has adversely affected the night sky and carries implications for ecology …
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High-brightness diode-pumped waveguide lasers
Reported in this thesis are advances toward high-brightness diode-pumped planar waveguide (PW) lasers. Efficient and compact planar waveguide lasers are made possible by their geometry, which is compatible with that of high-power diode lasers, has very good thermal management characteristics, and …
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Seawinds Radiometer Brightness Temperature Calibration And Validation
… and measure the ocean microwave emissions (brightness temperature, Tb) simultaneously with the backscattered power. When SeaWinds on ADEOS was launched, this same algorithm was applied, but the results were anomalous. The initial SRad brightness temperatures exhibited significant, …
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Brightness and Illumination by Interreflections in Enclosures
Made available in DSpace on 2014-12-04T21:02:38Z (GMT). No. of bitstreams: 1 0007885.pdf: 8915093 bytes, checksum: 3406bbcb7458b4309c78d51a4d7b8166 (MD5) Previous issue date: 1954
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The brightness-weight correspondence in adults and infants
… infants appreciate the correspondence between brightness and weight (Walker, Bremner, Mason, Spring, Mattock, Slater, & Johnson, 2010; Walker, Bremner, Lunghi, Dolscheid, Barba, & Simion, 2018). The objective of the current thesis was to understand more about the correspondence between …
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The effects of auditory stimulation on visual brightness
Thesis (M.A.)--University of Kansas, Psychology, 1932.
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A stereo vision system with automatic brightness adaptation
… thesis describes the development of an automatic brightness adaptive imaging system for use in stereo vision algorithms implemented for a variety of processing architectures. A 256 x 256 array of wide dynamic range pixels with on-chip A/D converters provides the digital data path for a feedback …
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Low Surface Brightness Galaxies and the Galaxy Stellar Mass Function
… is failing to account for undetected low-surface-brightness galaxies (LSBGs) within the fields observed. These galaxies have been known about for some time, however, taking a true census of their population is difficult because of the biases associated with their detection in large surveys. The …
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Generation, transport and focusing of high-brightness heavy ion beams
… dynamics in the final transport. A high brightness ion source using an aperturing technique delivers 25 mA of single charged potassium ion beam at 300 keV and a normalized edge emittance of 0.05 r-mm-mr. The ion beam is injected into a large bore magnetic quadrupole lattice, which …
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High-brightness electron beams from a DC, high-voltage, GaAs photoemission gun
… plane, we calculated that the normalized peak brightness of these bunches varied from 10^9 to 10^10 A m-2 rad-2 over the charge range investigated. The momentum spread increased from O.1 to 1.3% over the same range of bunch charge. Comparison of these measured values with PARMELA simulations …
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Improved model of the optical brightness of satellites with several reflective surfaces
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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High Efficiency SEPIC Converter For High Brightness Light Emitting Diodes (LEDs) System
This thesis presents an investigation into the characteristics of and driving methods for light emitting diode (LED) lamp system. A comprehensive overview on the lighting development is proposed. The characteristic of the light emitting diode (LED) lamp is described and the requirements of the …
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A Roughness Correction for Aquarius Ocean Brightness Temperature Using the CONAE MicroWave Radiometer
… using an L-band radiometer that measures ocean brightness temperature (Tb). The application of L-band radiometry to retrieve SSS is a difficult task, and therefore, precise Tb corrections are necessary to obtain accurate measurements. One of the major error sources is the effect of ocean …
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An investigation of the influence of three matching instructions on subfusional intermittent brightness
Thesis (M.A.)--Michigan State University. Dept. of Psychology, 1967
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Transverse mode selection and brightness enhancement in laser resonators by means of volume Bragg gratings
… output and reduced beam quality, limiting the brightness of the system. As one possible solution, the angular selectivity of a diffractive optical element is proposed as a spatial filter, allowing for the design of compact high brightness sources not possible with conventional methods of …
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Experimental investigation of the emission of high-brightness extreme ultraviolet radiation from laser-plasma interactions
… and spectral measurements give a calculated peak brightness of 6.4 × 1027 photons/s/mm2/mrad2/0.1% BW, occurring at 7.5 nm, assuming the duration of the radiation pulse is Fourier limited to 11 as.
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Effects of alley brightness cue manipulation preceding shock on self-punitive responding in the rat
… 1947), then the interstimulus interval between brightness cues (CS) and shock (UCS) may similarly affect VC behavior. Experiment 1 examined effects of brightness cue change on VC responding. Forty male hooded rats were assigned to four groups in a 2 x 2 design, using the presence or absence of …
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