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.
Results
Showing 1 to 20 of 43 for “"spectral measurements"”.
-
Hyper-Spectral Sensor Calibration Extrapolated from Multi-Spectral Measurements
Hyper-spectral (HS) sensors are the instruments of choice for remote sensing applications involving environmental monitoring, littoral survey, and military assessment. Accurate band-to-band sensor radiometric calibration is critical for successful data mining of such HS spectral sets. Current …
-
Multivariable analysis of spectral measurements for the characterization of semiconductor processes
The availability of affordable and reliable optical sensor technology and the abundance of data that these sensors now provide have created new opportunities to better characterize and control semiconductor processes in real-time. This thesis focuses on the analysis of multivariate methods and …
-
Correlation and Spectral Measurements of Fluctuating Pressures and Velocities in Annular Turbulent Flow
Made available in DSpace on 2014-12-14T06:26:10Z (GMT). No. of bitstreams: 1 8009210.pdf: 4751713 bytes, checksum: a159e8813e6ee7cfe2821618c2c6fdb7 (MD5) Previous issue date: 1979
-
Basic and Practical Considerations in Utilizing a Fourier Transform Spectrometer for Spectral Measurements
Made available in DSpace on 2014-12-09T17:36:47Z (GMT). No. of bitstreams: 1 7020979.pdf: 5019518 bytes, checksum: 5c3ff8cd59eda9148117156aa3aad055 (MD5) Previous issue date: 1970
-
Formant and burst spectral measurements with quantitative error models for speech sound classification
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
-
Development of Specialized Laser Doppler Velocimeters for High Resolution Flow Profile and Turbulence Spectral Measurements
… need of innovative instruments for flow velocity measurements. An ideal instrument would be non-intrusive, have a very fine spatial resolution as well as a very fine temporal resolution, be able to measure three-components of velocity, and be compact. Through recent advancements, laser Doppler …
-
Spectral measurements of hydrogen Lyman-alpha in the atmospheres of Venus and Jupiter using a sounding rocket and the Hubble Space Telescope
… the limb was derived from the image data.. The spectral data confirm evidence of a superthermal component and that is moving more than 15 km/s faster than remaining hydrogen. This analysis shows evidence that the Bulge is influenced by similar processes that create equatorial anomalies similar …
-
LOW-TEMPERATURE CHARACTERIZATION OF A 1.55-μm MULTIPLE-QUANTUM-WELL LASER DOWN TO 10 K
… extracted from conventional L-I/I-V and spectral measurements, is presented and analyzed. The results indicate that a diode laser designed for room-temperature operation can perform surprisingly well at cryogenic temperatures.
-
Cold-cavity measurement of excess optical loss in oxide-confined vertical cavity surface emitting lasers
… losses. A generalized method using sub-threshold spectral measurements matched to model calculations is demonstrated to determine optical loss in microcavity lasers. Cold-cavity spectral characteristics are used to extract the size dependent optical loss for small diameter oxide-confined vertical …
-
Microscopic and spectral characterisation of optical Fibre Bragg gratings
… various wavelengths, the information gained from spectral measurements has been compared with the DIC images. The sensing capacities of complex structure FBGs were investigated using standard sensor calibration techniques which monitor wavelength shifts with changes in temperature and strain.
-
The Categorization of Soil Moisture Content in the Near Infrared Spectrum
… designed, tested and developed. The atmospheric spectral information and target detection range for infrared spectroscopy was analyzed. In order to measure soil moisture using grating spectroscopy, a trade study of the Argus 1000 spectrometer components was performed. This provided the basis for …
-
Neutron activation analysis of plantinum converter and furnace mattes using a D-T sealed tube neutron generator
… elemental concentrations calculated. Radiometric spectral measurements were also made of the samples, without prior irradiation, and the spectra analysed for isotopic variation. Consequences for sample identification via these techniques are discussed.
-
The optical properties of oxide films on copper and copper alloys
… confirmed by x-ray diffraction and coulometry. Spectral measurements covering the wavelength range 350 - 750 nm were made using an automatic, self-nulling ellipsometer. From this data the optical constants and thickness of the oxide films were computed and compared to those of the bulk oxide. …
-
Similarity relations of wind waves in finite depth
… and Donelan et al. (1985) are tested using spectral measurements from Lake St. Clair. Assuming spectral similarity in wave number space relations between the energy, equilibrium parameters and peak wave number are derived. Using a regression analysis, relations are obtained from the data and …
-
The effects of evaporation rate, solvent, and substrate on the surface segregation of block copolymers
… using both the Cls shakeup to main ratio, and spectral measurements of the valence band. The results of this study indicate a variation in surface concentration as well as concentration gradient for different sample preparation routes. The variations can be explained by considering the rate of …
-
Estimating source strengths and lifetime of Nitrogen Oxides from satellite data
… leading to ozone production in the troposphere. Spectral measurements from satellite platforms of the light reflected by the earth allow the retrieval of several trace gases, e.g. NO2. In this thesis, the spectra of the satellite instruments GOME and SCIAMACHY were used to determine tropospheric …
-
Shock convergence and mix dynamics in inertial confinement fusion
… in reduced gain or failed ignition. Nuclear measurements of direct-drive implosions at the OMEGA laser facility were performed to study shock convergence and mix dynamics in ICF. During these studies, an unexpected scaling of experimental nuclear yields was observed in implosions of capsules …
-
Assessment of Spectral Reflectance as Part of a Variable-Rate Nitrogen Management Strategy for Corn
Spectral reflectance-based, remote sensing technology has been used to adjust in-season nitrogen (N) fertilizer rates for wheat to account for spatial variability in grain yield potential at a sub-meter resolution. The objective of this study was to examine the relationships among spectral …
-
Boundary Layer Characteristics on a Tiltrotor Blade Model
… and angles of attack. Turbulence intensity and spectral measurements were performed using a single hot wire at the highest Reynolds number. Conclusion was reached that both of the flattened pitot probe and single hot wire are good for boundary layer thickness measurements. Displacement …
-
Ultrafast Vibrational Dynamics of Water and Confined Water in Reverse Micelles
… with transient anti-Stokes and Stokes Raman measurements. The exact quantum yield of the symmetric sulfonate stretch nSO-3 of AOT head group is measured using controlled mid-IR excitations and spectral measurements. The sulfonate quantum yield, ranging between 0.025 and 0.002, mainly depends …
Page 1 of 3