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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.
171

Sampling Fish: a Case Study from the Čḯxwicən Site, Northwest Washington

Syvertson, Laura Maye 01 September 2017 (has links)
Researchers on the Northwest Coast (NWC) are often interested in complex questions regarding social organization, resource intensification, resource control, and impacts of environmental change on resources and in turn human groups. However, the excavation strategies used on the NWC often do not provide the spatial and chronological control within a site that is necessary to document their variability and answer these research questions. The Čḯxwicən site has the potential to address some of the limitations of previous Northwest Coast village site excavations because of its unique and robust sampling strategy, the wide expanse of time that it was occupied, and the multiple house structures present. An on-going project is examining changing human ecodynamics over the breadth of site occupation, focusing on zooarchaeology and geoarchaeological records. This site, located on the Strait of Juan de Fuca in Port Angeles, WA was excavated in 2004 as part of a Washington State Department of Transportation (WSDOT) undertaking to build parts for the Hood Canal Bridge Large scale excavation (261.4 m3 528 m2) generated enormous quantities of faunal remains. Radiocarbon dates and historic records show occupation extends from 2750 cal. BP to the early 20th century. Statistical sampling methods provide an empirical way to maximize the amount of information obtained with the least amount of effort. My thesis addressed the utility of Sampling to Redundancy (STR) as a statistical sampling method for sampling faunal remains from large village sites. My project has documented the variability of fish family representation across time and space in one part of the Čḯxwicən village, while minimizing the time and effort required to do so. This thesis applies STR to "S" (> 1/4 in.) 10 Liter bucket samples from eight excavation units and a total of 26 separate unique temporal and spatial contexts. I focused on 1/4 in. samples for my study for a particular reason. Previous fish faunal studies have focused on effects of mesh size on fish representation; and emphasized the need to use fine mesh (e.g., 1/8 in. or finer) to document small-bodied fishes. This focus on fine mesh typically means that only limited volumes of matrix are studied, which in turn may mean that remains of rarer, large- bodied fishes are under- represented. The on-going research project has focused on buckets screened to 1/8 in. mesh (called "C" buckets). I used STR to sample additional volumes of matrix screened to 1/4 in. to examine whether expanding the volume studied would affect fish representation, which was a second goal of my project. Overall, I studied remains from 269 "S" buckets out of a total of 419 buckets, or 47% of the buckets. STR was most helpful for six of the high bone abundance and density contexts, where I analyzed less than 50% of the total buckets, was moderately helpful for 14 contexts, and not at all helpful for the six contexts with low fishbone abundance, where I analyzed 100% of the buckets. This analysis took me a total of 154 hours, and based on the percentage of material analyzed, 174 hours were saved. As to the second project goal, to assess whether adding fish remains documented from additional matrix volume affected fish representation, I found the differences were minimal. Both for my study units as a whole, and for each time period, adding the fish records from the "S" buckets did not alter the main trends in fish representation as documented by the larger study, using a smaller volume. To further examine whether the added volume from >1/4 in "S" buckets affected results, I explored specific research questions that are relevant to the larger project regarding environment-animal interactions and fishbone deposition and bone condition inside and outside of a house structure. Adding the "S" bucket samples did not affect fish representation or fishbone distribution and condition, which affirms that the sampling strategy used in the larger research project was sufficient in most cases to characterize the fish record at the site. My approach to STR has focused on fish remains that were previously excavated from a Pacific coastal village site with dense archaeological deposits. STR could be employed in other types of archaeological settings in a range of environments (coast or interior) representing a range of cultural contexts (from hunting camps to urban centers) to establish sample redundancy after an excavation is complete. STR could be used during on-going excavation. Further research is required to explore the implications of STR in these settings, however it is likely that the success of STR in other contexts will be dependent on the density and overall abundance of remains, the diversity or material types being studied, as well of course in the range and specificity of questions in each case.
172

Sublethal effects of estuarine carbaryl applications on juvenile English sole (Pleuronectes vetulus)

Pozarycki, Scott V. 23 April 1999 (has links)
The pesticide carbaryl is applied annually to tidelands in Willapa Bay and Grays Harbor, WA to control populations of burrowing shrimp which modify sediments making the habitat unsuitable for oyster culture. Fish trapped on sprayed mudflats are often killed, but little is known about effects on fish present in subtidal channels or migrating over treated mudflats with a flood tide. The purpose of this work was to determine the effect of estuarine carbaryl applications on fish present in these areas. Field studies with caged juvenile English sole (Pleuronectes vetulus) indicated that brain acetylcholinesterase (AChE) activity is decreased following carbaryl application. Mean brain AChE inhibition was 26% in fish placed on treated mudflats and 24% in fish placed subtidally. Maximum individual values approached 50%. Maximum carbaryl water concentration measured by HPLC was 1.2 ug/ml at the cage sites. Sediment concentrations on treated mudflats were as high as 2300 ug/g OC 24 hrs post application. The concentration of carbaryl in invertebrates collected from treated mudflats has been measured as high as 76 ug/g, and English sole likely ingest these contaminated prey in the field. Laboratory studies conducted to evaluate the effect of such an oral exposure indicated that brain AChE activity is decreased with the ingestion of as little as 1% body weight of food pellets spiked to field concentrations. AChE inhibition exceeding 25% is predicted in wild fish based on the ingestion of average quantities of food (5% body weight) at average measured concentrations (30 ug/g). Limited recovery occurs 24 hrs after exposure indicating effects can be compounded with further ingestion. This oral exposure coupled with the effect measured in caged fish suggests AChE inhibitions exceeding 50% are possible assuming the effects are additive. The significance of this decrease in AChE activity was then evaluated in terms of two ecologically important endpoints. First, the effect of carbaryl on the ability of English sole to bury in sediments was determined Results indicate this behavior is affected by carbaryl in a dose-dependent manner with fish not burying at higher concentrations. A regression model indicated that 50-60% brain AChE inhibition is a threshold value below which burying decreased sharply. This is within the range of estimated field exposures. Recovery of burying behavior occurs shortly after the removal of the exposure with all exposed fish in the present study recovering the ability to bury in sediments within 24 hrs. Mean brain AChE inhibition at the time of recovery was 60%. The effect of carbaryl on the English sole nonspecific immune response was also evaluated. Head kidney phagocytes were isolated from English sole and exposed to carbaryl in vitro. Phagocytosis was then evaluated based on the percentage of cells ingesting heat killed yeast. The percentage of phagocytic cells decreased at doses of 10 and 100 ug/ml. These concentrations are likely higher than can be attained during an in vivo exposure. Effects on this immune response are thus unlikely in field exposed English sole. / Graduation date: 1999
173

Whole farm case studies : a how-to guide

Murray, Helene 08 September 1993 (has links)
Calls for increased farmer involvement in research and extension programs have been numerous and well supported. One approach to integrate the collective knowledge and experience of agricultural scientists and farmers is through whole farm case studies (WFCS). An interdisciplinary team of 34 research and extension personnel at Oregon and Washington State Universities conducted WFCS of 16 vegetable and small fruit farms beginning in April 1989. The objectives of the Oregon/Washington case study project were to: (1) increase farmer involvement in research and education programs; (2) develop an interdisciplinary team to address issues of agricultural sustainability in western Oregon and Washington; (3) examine the use of the case study approach in agricultural situations; (4) prepare a guide to assist other persons interested in conducting WFCS; (5) develop a better understanding of vegetable and small fruit farming systems in the region; and, (6) identify sustainable agriculture research and education needs in western Oregon and Washington. The WFCS process proved useful in developing an interdisciplinary team, and the vast majority of team members participating in the study stated they would consider using the WFCS approach again in their work. However, the primary constraint cited by all team members was the amount of time required to conduct the study. The process of conducting WFCS in western Oregon and Washington improved communication among a wide group of people. Team members gained a better understanding of the complexity of farms and identified several areas requiring further research. Farmers stated they enjoyed participating in the case study project and discovered new information that will assist them in managing their farming systems. Farmer-developed innovations were identified that are useful to other farmers and to the research process. Included in this thesis are: (1) a guide for conducting whole farm case studies; (2) a summary of data collected from 16 farms in western Oregon and Washington participating in the WFCS, including a summary of interaction among interdisciplinary team members; and, (3) a profile of one of the farms participating in the WFCS. / Graduation date: 1994
174

Indirect parameter identification algorithm in radial coordinates for a porous medium

Roley, Kenneth L. 10 March 1992 (has links)
The decision to bury high level nuclear wastes in deep geological formations led to the study of the Hanford Nuclear Reservation as one of three possible sites for the first nuclear waste repository in the United States. To adequately evaluate the environmental impact of siting nuclear waste repositories in basalt aquicludes, it is essential to know the effects on parameter identification algorithms of thermal gradients that exist in these basaltic aquicludes. Temperatures of approximately 60° C and pressures of approximately 150 atms can be expected at potential repository sites located at depths of approximately 1000m. The phenomenon of over-recovery has been observed in some pumping tests conducted at the Hanford Nuclear Reservation. This over-recovery phenomenon may possibly be due to variations in the fluid density caused by thermal gradients. To asses the potential effects of these thermal gradients on indirect parameter identification algorithms, a systematic scaling of the governing field equations is required in order to obtain dimensionless equations based on the principle of similarity. The constitutive relationships for the specific weight of the fluid and for the porosity of the aquiclude are assumed to be exponentially dependent on the pressure gradient. The dynamic pressure is converted to the piezometric head and the flow equation for the piezometric head is then scaled in radial coordinates. Order-ofmagnitude estimates are made for all variables in unsteady flow for a typical well test in a basaltic aquiclude. Retaining all nonlinear terms, the parametric dependency of the flow equation on the classical dimensionless thermal and hydraulic parameters is demonstrated. These classical parameters include the Batchelor, Fourier, Froude , Grashof, and Reynolds Numbers associated with thermal flows. The flow equation is linearized from order-of-magnitude estimates based on these classical parameters for application in the parameter identification algorithm. Two numerical solutions are presented which predict hydraulic head given a continuous set of flow parameters. The first solution uses a totally numerical finite difference scheme while the second combines an analytical solution with a numerical solution. A radial coordinate system is utilized for describing an anisotropic confined aquifer. The classical inverse parameter identification problem is solved using an indirect method. This method is based on the minimization of a objective function or error criterion consisting of three parts: 1) least-squares error of head residuals; 2) prior information of flow parameters; and 3) regularization. An adjoint equation is incorporated into the method to eliminate the need to differentiate the heads with respect to the parameters being identified, increasing the stability of the algorithm. Verification of the parameter identification algorithm utilizes both "synthetic", computed generated input data and field data from a well test for a confined aquifer within the Columbia Plateau near Stanfield, Oregon. The method used is found to give parameter estimates which are both stable and unique. / Graduation date: 1992
175

Paddle to Seattle : a native Washington movement to "Bring them canoes back home"

Lincoln, Leslie Jeanne January 1990 (has links)
This thesis documents the 1989 Washington Centennial Commissions' Native Canoe Project. Seventeen Western Washington tribes participated in a canoe-oriented cultural heritage renewal movement. The ethnographic setting establishes Native dugouts in their historic social context and presents the classic hull forms of representative canoe types. After a hiatus of several generations of canoe use, many tribes began to reconstruct their disappearing canoeing ways. Through the process of carving and using their dugouts, they have addressed current issues. Canoe racing and voyaging has proven to be effective, culturally relevant alternative to drug and alcohol abuse. Native people reaffirmed access to landing beaches and forest resources and created community carving centers. Case studies of the Lummi, Suquamish, Tulalip, Port Gamble Klallam and Quileute tribes reveal continuity, schisms and the reinvention of Native dugout traditions. The culminating "Paddle to Seattle" voyage illuminates the vital role of these canoes to unite communities and legitimize Indian values. Abundant use of Native commentary from collected oral histories substantiate my interpretations and offer authority to Native perspectives. Ethnopoetic transcriptions express an understanding of these cedar canoes in the enduring Native thoughtworld. / Arts, Faculty of / Anthropology, Department of / Graduate
176

Interdependence, state competition, and national policy : regulating the British Columbia and Washington Pacific salmon fisheries, 1957-1984

Urquhart, Ian Thomas January 1987 (has links)
This study explores the politics of regulating the British Columbia and Washington commercial salmon fisheries between 1937 and 1984. The principal focus of this comparative-historical study is upon one particularly striking exception to the tendency of regulators to tighten commercial salmon fishing restrictions over time - the persistence of liberal offshore trolling regulations. The dissertation argues that the anomalous treatment of the offshore troll fishery during this period may be ascribed to the competition between states for the right to harvest salmon - a common property resource. In making this claim, the study questions the adequacy of the interest-group driven explanations of policy which figure prominently in the literature on regulation. Two pillars of interest group theory, the tendencies to explain national policy only through reference to domestic politics and to reduce state behaviour to little more than the product of the demands of private sector interests, are challenged in this comparative case study. The challenge to the first tendency of interest group theory is sustained by examining the relations between national regulatory preferences and the foreign fishery policy goals of Canada and the United States. The pursuit of two goals - Asian exclusion and North American equity - in bilateral and multilateral negotiations demanded the adoption of particular regulatory profiles. Liberal offshore troll regulations may be explained according to the legitimacy and bargaining advantages they lent to Canadian and American efforts to incorporate these two goals into modifications to the traditional fishery regime. The study also suggests that, in a setting characterized by intergovernmental competition, regulatory policies may not always be equated with the preferences of interested private parties. In this setting the state's ability or willingness to respond to even the most influential private sector interests may be limited by the state's evaluation of its bargaining resources and requirements. State competition created a context where government attitudes towards offshore salmon fishing could be understood in terms of state preferences, preferences derived from officials' perceptions of the legitimacy of various national regulatory policies in the context of valued international institutions. While state competition is the centrepiece of the explanation of national fishery policy developed in this study its explanatory power is mediated by two intervening institutional variables - the capacities of states to formulate and implement policies and the structure of the international regime itself. The level of knowledge regarding the salmon resource played an instrumental role in the formulation of regime goals and of pertinent national policies. The extent to which state management in offshore waters was fragmented between different bureaus affected the ability of officials to adopt national policies which suited their international purposes. The redistribution of the American state's fishery management capacity in the 1970s was a catalyst for the severe restrictions visited upon Washington trailers at that time. A second institutional factor, the structure of the international fishery regime, also mediated the competition between states. The series of reciprocal fishing privileges agreements between Canada and the United States was particularly important in maintaining established offshore regulatory preferences during the 1970s when the clash between American and Canadian salmon fishery perspectives was intensifying. / Arts, Faculty of / Political Science, Department of / Graduate
177

The Realization of the Cathlapotle Plankhouse: Reflections on Cross-Cultural Collaboration in the Post-NAGPRA Era

Boyne, Erica Lynn 01 January 2011 (has links)
In the last two decades, a shift in the museological paradigm has changed the way in which Native American history and culture is interpreted and represented to the general public. As legal mandates and growing institutional pressures increasingly call for the integration of tribal representatives into the decision-making bodies of museums and authoritative institutions, cross-cultural collaboration and partnerships have increased significantly. With little precedent guiding public historians and museum professionals through this new and complex system of collaboration, the path unfolding in the journey towards the “indigenization”; of museums has been marked with achievements and challenges that have both taught and tested historical professionals. The following is a case study that examines the ways in which this unfolding shift in Native American representation manifested itself in the reconstruction of a Chinookan plankhouse in the early 21st century. With a common objective of educating visitors about the significant cultural and natural history of the former site of the Cathlapotle village, the U.S. Fish and Wildlife Service and the Chinook Indian Nation teamed up to design, fund, construct and interpret the Cathlapotle Plankhouse in Ridgefield, Washington. Despite sharing a common goal for the reconstruction of a full-scale Chinookan plankhouse, different motivations and agendas guided the decision-making process and required both partners to make compromises that challenged each other’s understanding and expectations of the project. In this work, I analyze how these two organizations navigated the rewarding yet challenging realm of cross-cultural collaboration to create a meaningful and significant heritage site for a wide range of user groups. From this analysis, I hope to provide public historians and museum professionals a detailed example of a cross-cultural partnership that will assist them as they move forward through a continuously unfolding and largely uncharted system of collaboration.
178

Late Pleistocene and Holocene Aged Glacial and Climatic Reconstructions in the Goat Rocks Wilderness, Washington, United States

Heard, Joshua Andrews 01 January 2012 (has links)
Eight glaciers, covering an area of 1.63 km2, reside on the northern and northeastern slopes of the Goat Rocks tallest peaks in the Cascades of central Washington. At least three glacial stands occurred downstream from these glaciers. Closest to modern glacier termini are Little Ice Age (LIA) moraines that were deposited between 1870 and 1899 AD, according to the lichenometric analysis. They are characterized by sharp, minimally eroded crests, little to no soil cover, and minimal vegetation cover. Glacier reconstructions indicate that LIA glaciers covered 8.29 km2, 76% more area than modern ice coverage. The average LIA equilibrium line altitude (ELA) of 1995 ± 70 m is ~150 m below the average modern ELA of 2149 ± 76 m. To satisfy climate conditions at the LIA ELA, the winter snow accumulation must have been 8 to 43 cm greater and mean summer temperatures 0.2 to 1.3 ºC cooler than they are now. Late Pleistocene to early Holocene (LPEH) aged moraines are located between 100 and 400 m below the LIA deposits. They have degraded moraine crests, few surface boulders, and considerable vegetation and soil cover. Volcanic ashes indicate LPEH moraines were deposited before 1480 AD while morphometric data suggest deposition during the late Pleistocene or early Holocene. The average LPEH ELA of 1904 ± 110 m is ~ 240 m and ~90 m below the modern and LIA ELAs, respectively. The climate change necessary to maintain a glacier with an ELA at that elevation for LPEH conditions requires the winter accumulation to increase by 47 to 48 cm weq and the mean summer temperature to cool by 1.4 to 1.5 ºC. Last glacial maximum (LGM) moraines are located more than 30 km downstream from modern glacial termini. They are characterized by hummocky topography, rounded moraine crests, complete vegetation cover, and well developed soil cover. Moraine morphometry, soil characteristics, and distance from modern glacial termini indicate that deposition occurred at least 15 ka BP during an expansive cooling event, the last being the LGM. The LGM ELA of 1230 m is ~920 m below the modern ELA. The climate change necessary to maintain a glacier with an ELA at that elevation for LGM conditions requires the mean summer temperature to cool by 5.6 ºC with no change in precipitation.
179

Aboriginal burial practices in the plateau region of North America

Sprague, Roderick, 1933- January 1967 (has links)
No description available.
180

A study on auto parts bilateral trade between the USA and the East Asian countries : research report.

January 1982 (has links)
by Cheung Po-wah. / Abstract also in Chinese / Bibliography: leaf 140 / Thesis (M.B.A.)--Chinese University of Hong Kong, 1982

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