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- Aquifers -- Oregon -- Multnomah County (1)
- Bays -- Oregon (1)
- Blue Lake Region (Or.) (1)
- Bubbles -- Mathematical models (1)
- Chaotic behavior in systems (1)
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- Deuterons -- Mathematical models (1)
- Earthquakes -- Oregon (1)
- Faults (Geology) -- Oregon (1)
- Fishes -- Conservation -- Oregon (1)
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- Groundwater -- Oregon -- Multnomah County (1)
- Groundwater -- Thermal properties (1)
- Groundwater temperature -- Oregon -- Columbia River Gorge (Or. and Wash.) (1)
- Heat -- Transmission -- Measurement (1)
- Hydrogeology -- Oregon -- Multnomah County (1)
- Limnology -- Washington (State) -- Castle Lake (1)
- Limnology -- Washington (State) -- Coldwater Lake (1)
- Oregon Trout (1)
- Pacific salmon -- Columbia River (1)
- Refrigeration and refrigerating machinery -- Thermodynamics -- Computer programs (1)
Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
An Experimental Investigation Of The Finite Time Efficiency Of A Peltier Refrigeration Device, Thomas Schneider
An Experimental Investigation Of The Finite Time Efficiency Of A Peltier Refrigeration Device, Thomas Schneider
Dissertations and Theses
Since the need of energy conservation has become more and more urgent in the past decades, there has been an increased interest in the study and development of more efficient energy conversion systems. One of the fields that have arisen from that endeavor is a branch of physics called Finite Time Thermodynamics (FIT). It may be said that FIT was initiated through the famous paper by Curzon and Ahlborn (1975) that established new bounds on the efficiency of a finite time Carnot heat engine. Before, the traditional treatments gave a fundamental upper limit on the efficiency of any heat engine. …
Behavior Of An Ion In A Bubble In The Ground State, Joung Hoon Oh
Behavior Of An Ion In A Bubble In The Ground State, Joung Hoon Oh
Dissertations and Theses
Deuterons might be trapped in a bubble embryo which occur s due to statistical fluctuation in heavy water. The size of the bubble embryo is expected to be an order of a small molecule. The ground state energy level which the deuteron may occupy in the bubble is calculated by solving the Schroedinger equation, and by considering the interaction between the trapped deuteron by a spherical bubble and the surrounding polarized liquid medium (heavy water). From the dependence of the energy eigenvalue of the ground state on the bubble radius, the pressure exerted on the bubble wall is obtained. It …
The Dimension Of A Chaotic Attractor, Roslyn Gay Lindquist
The Dimension Of A Chaotic Attractor, Roslyn Gay Lindquist
Dissertations and Theses
Tools to explore chaos are as far away as a personal computer or a pocket calculator. A few lines of simple equations in BASIC produce fantastic graphic displays. In the following computer experiment, the dimension of a strange attractor is found by three algorithms; Shaw's, Grassberger-Procaccia's and Guckenheimer's. The programs were tested on the Henon attractor which has a known fractal dimension. Shaw's and Guckenheimer's algorithms were tested with 1000 data points, and Grassberger's with 100 points, a data set easily handled by a PC in one hour or less using BASIC or any other language restricted to 640K RAM. …
The Angler As Environmentalist: Oregon Trout And The Fight To Save The Wild Salmon Of The Columbia River, John P. Rosenberg
The Angler As Environmentalist: Oregon Trout And The Fight To Save The Wild Salmon Of The Columbia River, John P. Rosenberg
Dissertations and Theses
This paper traces the history of Oregon Trout, an environmental organization in Portland, Oregon, from its beginning in the fall of 1983 through the spring of 1990, when it filed petitions on behalf of four stocks of Columbia and Snake River salmon under the Endangered Species Act. It focuses on Oregon Trout's efforts to preserve the wild salmon of the Columbia River as a contemporary example of anglers acting as environmentalists to conserve threatened or endangered species. According to historian John Reiger in American Sportsmen and the Origins of Conservation, hunters and anglers have been acting in this role …
Limnology Of Two New Lakes, Mount St. Helens, Wa, Valerie Jean Kelly
Limnology Of Two New Lakes, Mount St. Helens, Wa, Valerie Jean Kelly
Dissertations and Theses
Coldwater Lake and Castle Lake are two new lakes which were formed in the aftermath of the volcanic eruption of Mount St . Helens, WA in May, 1980. This research describes the limnology of these lakes ten years later, and includes physical, chemical, and biological parameters. The two lakes are compared and contrasted. Previous research on the eruption and its aftermath, as well as earlier studies of the lakes are described.
Interpretation Of The Thermal Behavior Of Groundwater In An Alluvial Terrace : Bonneville Dam, Columbia Gorge, Oregon, Richard Stephen Malin
Interpretation Of The Thermal Behavior Of Groundwater In An Alluvial Terrace : Bonneville Dam, Columbia Gorge, Oregon, Richard Stephen Malin
Dissertations and Theses
Groundwater temperature data, collected at an alluvial terrace located on the Oregon shore of the Columbia River downstream from Bonneville Darn, was analyzed in order to characterize and formulate a conceptual model of the thermal data for the groundwater system in the terrace. There is concern that an unlined entrance channel for a new navigation lock, to be located down the middle of the terrace, will widen the range of temperatures in the fish hatchery-groundwater supply. The analysis of temperature behavior in the terrace supports the hydraulic observations derived from analysis of pump test data, but with greater definition of …
Late Holocene Paleoseismicity Along The Northern Oregon Coast, Mark Edward Darienzo
Late Holocene Paleoseismicity Along The Northern Oregon Coast, Mark Edward Darienzo
Dissertations and Theses
Marsh paleoseismological studies were conducted in four bays (Necanicum, Nestucca, Siletz, and Yaquina) along the northern Oregon coast and compared with completed studies in two other bays (Netarts and Alsea). Coseismically buried peats were identified in all bays, based on 1) abrupt contacts, decreases in organic content, increases in sand content, increases in beach sand, and changes in diatom assemblages, all from the peat to the overlying sediments, 2) distinct sandy layers and key plant macrofossils, such as Triglochin, above the buried peat, and 3) widespread correlation of the buried peats within the bay. The stratigraphy and the ages and …
Hydrogeology Of An Alluvial Aquifer In The Blue Lake Area, East Multnomah County, Oregon, James Mitchell Wilkinson
Hydrogeology Of An Alluvial Aquifer In The Blue Lake Area, East Multnomah County, Oregon, James Mitchell Wilkinson
Dissertations and Theses
This thesis evaluates the hydraulic relationship between the Blue Lake gravel aquifer, the Columbia River, and Blue Lake. Hydrogeology, water levels, and stable isotopes were used to establish these hydraulic relationships.
Transient Heat Transfer, Eric Roth
Transient Heat Transfer, Eric Roth
Dissertations and Theses
With the advent of the new high Tc superconductors, liquid nitrogen will be one of the preferred cryogens used to cool these materials. Consequently, a more thorough understanding of the heat transfer characteristics of liquid nitrogen is required. In our investigations we examine the transient heating characteristics of liquid nitrogen to states of nucleate and film boiling under different liquid flow conditions. Using a platinum hot wire technique, it is verified that there is a premature transition to film boiling in the transient case at power levels significantly lower than under steady state nucleate boiling conditions. It is also shown …