Thesis (Ph. D.)--University of California, San Diego, 2001. / Vita. Includes bibliographical references.

Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, September 1990. / Thesis Advisor(s): Haney, R. L. ; Stanton, T. P. "September 1990." Description based on title screen viewed on December 17, 2009. DTIC Descriptor(s): Ocean currents, *fronts (oceanography), diagnosis(general), California, transitions, theses, mathematical models, vertical orientation. DTIC Identifier(s): California current, CTZ (California transition zone). Author(s) subject terms: Diagnostic model, California Current, CTZ, dynamical modes. Includes bibliographical references (p. 64-66). Also available in print.

Thesis (M.S.) in Marine Biology--University of Maine, 2001. / Includes vita. Includes bibliographical references (leaves 91-98).

Thesis--M. Phil., University of Hong Kong, 1981.

No description available.

A lacustrine sedimentary process study was undertaken at Kluane Lake, which is a large, glacier-fed, alpine lake in the southwestern corner of Yukon Territory. Data from moored instruments, sediment traps, water column profiling, and high-resolution sub-bottom acoustic surveys were collected over the peak melt seasons of 2006 and 2007 in order to document the spatial and temporal lacustrine sedimentation patterns. A river monitoring station was also established to continuously record the inflow variations of Slims River, which drains meltwater from Kaskawulsh Glacier. Kluane Lake receives sediment-laden (up to 5 g/l) water from Slims River, which varies diurnally in terms of both discharge and suspended sediment concentration. While evidence of seasonal sediment exhaustion is present within the system, the diurnal hysteresis relationship between discharge and suspended sediment is either insignificant or more commonly counterclockwise. The high suspended sediment load delivered by Slims River produces continuous, diurnally fluctuating turbidity currents with maximum velocities in excess of 0.6 m/s at delta-proximal locations, although velocities between 0.2 and 0.4 m/s are more typical. During peak flow conditions, variations in current velocity can be traced to the deepest portion of the lake, over 4 km from the point of inflow. The longitudinal changes in the vertical concentration profiles, suspended sediment load, and mass accumulation rates suggest that the flow structure of the turbidity currents changes rapidly along the first several kilometres of flow. Sedimentation in the Kluane Lake basin is dominated by turbidity currents; overflows occur intermittently and contribute less than 2% to sediment accumulation along the lake bed. The highest rate of deposition occurs approximately 1 km from the delta and is consistent with an accumulation of approximately 0.4 m/a; closer to the delta, high current velocities appear to inhibit sediment deposition. The sediment in Kluane Lake is dominated by silt-size particles and contains virtually no sand except in small amounts very close to the delta. The diurnal pattern of turbidity current activity produces daily rhythmites in sediment traps deployed near the lake bottom, but these laminations do not occur consistently over time or space. / Thesis (Master, Geography) -- Queen's University, 2008-05-22 13:42:20.629

The electrical heterogeneity of the heart has been recognized as an important feature of normal cardiac function. In cardiac myocytes, considerable electrophysiological differences in sodium channel currents have been reported between the atria and the ventricle. Although, these differences have been primarily attributed to heterogeneous populations of Na+ channel isoforms within cardiac tissue, the link between these electrophysiological differences and certain cardiac pathologies has been loosely studied. We sought to further elucidate the electrophysiological differences between the atria and the ventricle by characterizing INa in both cell types. For these studies we had initially predicted the atria to contain a greater density of TTX-sensitive Na+ channel isoforms compared to that of the ventricle. We used two well-known Na+ channel blockers: lidocaine (100 μM, 30 μM, 10 μM) and tetrodotoxin (TTX; 10 nM, 30 nM). In addition, we also applied hydrogen peroxide (H2O2; 100 μM, 30 μM, 10 μM) to atrial myocytes, which served as our pathological model for reactive oxygen species (ROS). When we applied lidocaine to cardiac myocytes, we observed an overall mixed response in both cell types. Specifically, we noted the most significant differences (p < 0.05) in peak INa, shifts in steady-state inactivation, and impaired recovery from fast inactivation in the presence of 100 μM lidocaine. Given the non-uniform responses to lidocaine, our results support the theory that tissue specific populations of Na+ channel isoforms exist within cardiac myocytes. In order to further elucidate the electrophysiological differences between the ventricle and the atria, we applied TTX, which is selective for TTX-sensitive Na+ currents. Our results indicated no overall significant differences between the ventricle and the atria, suggesting that the population of TTX-sensitive Na+ channel isoforms within the atria specifically, may not be pharmacologically detectable. Finally, our results also demonstrated that the atria are sensitive to ROS, where H2O2 significantly prolonged the action potential duration (APD) in atrial myocytes. Our results also suggest that, in addition to INa, other ion channels may be mediating a component of the H2O2-induced prolongation of the APD in adult rat atrial myocytes. / Thesis (Master, Physiology) -- Queen's University, 2010-08-27 10:04:19.043

No description available.

No description available.

Nearly three months of current meter records from five moorings off the Oregon coast taken between October 1977 and January 1978 were analyzed for near-inertial motions. The moorings were located from the midshelf out to the foot of the continental slope, spanning the continental margin. All but two of the eleven current meters were continuously below the mixed layer. For spectral analysis, the current observation period was divided into two time periods, one with large amplitude near-inertial motion (41.1 cm/sec maximum of the band-passed records) throughout and the other with much less near-inertial energy. The spectra of the current meter records showed between a 1 and 6% increase in frequency of the near-inertial peak above f (= 0.0592 cph) in all but three cases. The exceptions showed spectral peaks about 14% below f and were linked to a Doppler shift. The period of large amplitude near-inertial motion had diagonal coherence scales of over 450 meters vertically and 115 kilometers horizontally. An east-west (cross-shelf) wavelength of about 50 kilometers was estimated directly from the phase differences between current meters with roughly horizontal separations. The observed response of a current meter about 35 meters below the mixed layer to sharp maxima in the wind stress was similar to that predicted by the Pollard and Millard (1970) model for wind forced near-inertial motions in the surface mixed layer. The winds associated with a series of atmospheric fronts were apparently responsible for generating a 14-day period of large amplitude near-inertial motion observed below the mixed layer. / Graduation date: 1982