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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
421

Vibration of elastic bars /

Roetman, Ernest Levane. January 1963 (has links)
Thesis (Ph. D.)--Oregon State University, 1963. / Typescript. Includes bibliographical references (leaves 55-56). Also available on the World Wide Web.
422

Subtropical stratocumulus and its effect on climate /

Caldwell, Peter M. January 2007 (has links)
Thesis (Ph. D.)--University of Washington, 2007. / Vita. Includes bibliographical references (p. 117-126).
423

Embedded boundary scan for test & debug

Baig, Aijaz January 2009 (has links)
<p>The boundary scan standard which has been in existence since the early nineties is widely used to test printed circuit boards (PCB). It is primarily aimed at providing increased physical test access to surface mounted devices on printed circuit boards (PCB). Using boundary scan avoids using functional testing and In-circuit-techniques like '<em>bed of nails</em>' for structurally testing PCBs as increasing densities and complexities made opting for them a herculean task. Though the standard has had a revolutionizing effect on board testing conducted during the development and production phases, there is a lack of a standardized mechanism to allow IEEE 1149.1 to be used in a system post installation. This has led to problems typically encountered during field test runs, like the issue of high number of No-Fault-Found (NFF), being left unaddressed. The solution lies in conducting a structural test after a given module has already been installed in the system. This can be done by embedding the programmability features of the boundary scan test mechanism into the Unit under test (UUT) thereby enabling the UUT to conduct boundary scan based self tests without the need of external stimuli. In this thesis, a test and debug framework, which aims to use boundary-scan in post system-installation, is the subject of a study and subsequent enhancement. The framework allows embedding much of the test vector deployment and debug mechanism onto the Unit under test (UUT) to enable its remote testing and debug. The framework mainly consists of a prototype board which, along with the UUT, comprise the 'embedded system'. The following document is a description of the phased development of above said framework and its intended usage in the field.</p>
424

A study of the relationship between ageostrophy and dynamical periodicities of the tropical Pacific Boundary Layer

McCandlish, Cole B. 28 April 1994 (has links)
Eight years (1980-87) of twice-daily high-resolution radiosonde data from a tropical mid-Pacific island station are analyzed to generate time series of the planetary boundary layer (PBL) top pressure, an ageostrophic parameter (related to the divergence), and a parameter of mean PBL specific humidity. Sample spectra of these time series are calculated along with a spectra for nighttime outgoing longwave radiation (OLR) data (centered at a gridpoint near the island station) and compared in order to investigate the relationship between the ageostrophy and dynamical phenomena of the tropical Pacific. Methods of boundary layer top diagnosis are compared. Data derived methods include temperature inversion detection, humidity jump detection, and wind shear detection. The model based diagnosis method uses a Richardson number scheme. Comparisons between data derived methods and model based methods show good agreement. Correlation coefficients for comparisons are all above 0.91. In each sample spectra, the dominant peak corresponds to the frequency of the annual cycle. With an estimated annual cycle removed from each of the time series the nighttime (12 GMT) sample spectra for PBL top pressure shows a peak at a frequency that corresponds to the 30-60 day Intraseasonal Oscillation (ISO). Removal of an estimated annual cycle was unsuccessful for the daytime (0 GMT) sample spectra for PBL top pressure, PBL mean specific humidity, and the ageostrophic parameter. Sample spectra of the ageostrophic parameter show peaks in the ISO frequency range for both 12 GMT and 0 GMT even before removal of the annual cycle was attempted. The ISO range peaks remained in the 12 GMT ageostrophic parameter spectrum when the annual cycle was successfully removed. The nighttime OLR spectrum is dominated by the annual cycle peak and its harmonics. The OLR spectrum also shows a significant peak in the ISO range of periods. Removal of an estimated annual cycle intensifies the peak in the ISO range. The ageostrophic parameter time series is compared to the results of an EOF analysis performed on the same 8 years of radiosonde humidity measurements. The first three EOF modes of specific humidity give sample spectra which are dominated by the annual cycle. With the annual cycle removed the sample spectra of the first and third EOF modes of specific humidity both show significant peaks in the ISO frequency range, while the second EOF mode sample spectrum is dominated by two peaks at frequencies corresponding to periods of approximately 4 and 5 months. The presence of common frequencies in the ISO range of the power spectra of the ageostrophic parameter (a measure of divergence), the nighttime OLR (a measure of deep convection), the nighttime planetary boundary layer top, and the first EOF mode of specific humidity, lends support to theories that relate the ISO to the interaction of dynamics and moist processes. / Graduation date: 1995
425

Tussen Gariep en Niger : die representasie en konfigurasie van grense, liminaliteit en hibriditeit in Kleur kom nooit alleen nie van Antjie Krog / M.E. Taljard

Taljard, Maria Elizabeth January 2007 (has links)
Thesis (Ph.D. (Afrikaans and Dutch))--North-West University, Potchefstroom Campus, 2007.
426

A continental shelf bottom boundary layer model : the effects of waves, currents, and a moveable bed /

Glenn, Scott Michael. January 1983 (has links)
Thesis (D. Sc.)--Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1983. / "Funding was provided by the American Gas Association Project no. PR-153-126, the National Science Fundation under grant OCE-8014930, and NOAA-Sea Grant NA-79AA-D-00101 ; NA 79AA-D-00102." Includes bibliographical references (p. 201-205).
427

A continental shelf bottom boundary layer model : the effects of waves, currents, and a movable bed /

Glenn, Scott Michael. January 1983 (has links)
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1983. / Supervised by William D. Grant. Includes bibliographical references (leaves 201-205).
428

Interaction of high frequency internal waves and the bottom boundary layer on the continental shelf /

Sanford, Lawrence P. January 1900 (has links)
Thesis (Ph. D.)--Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1984. / Vita. Bibliography: p. 200-206.
429

Boundary regularity for free boundary problems /

Gurevich, Alex. January 1997 (has links)
Thesis (Ph. D.)--University of Chicago, Dept. of Mathematics, June 1997. / Includes bibliographical references. Also available on the Internet.
430

The edge algebra structure of boundary value problems

Schulze, Bert-Wolfgang, Seiler, Jörg January 2001 (has links)
Boundary value problems for pseudodifferential operators (with or without the transmission property) are characterised as a substructure of the edge pseudodifferential calculus with constant discrete asymptotics. The boundary in this case is the edge and the inner normal the model cone of local wedges. Elliptic boundary value problems for non-integer powers of the Laplace symbol belong to the examples as well as problems for the identity in the interior with a prescribed number of trace and potential conditions. Transmission operators are characterised as smoothing Mellin and Green operators with meromorphic symbols.

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