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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.
51

Nuclear and chloroplast diversity of Pacific Northwest wheat (Triticum aestivum) breeding germplasm

Edwards, Melanie Love 18 December 2002 (has links)
Wheat breeders must effectively maintain and manage existing genetic diversity in order to continue the development of superior genotypes. It is therefore fundamental that the genetic relationships and diversity within the germplasm pools be thoroughly characterized and understood. Recently, DNA-based markers have provided powerful tools for genetic diversity analysis. This study investigates the usefulness of nuclear and chloroplast simple sequence repeat (SSR) markers in characterizing Pacific Northwest wheat (Triticum aestivum) breeding germplasm, and explores the patterns of genetic relatedness revealed by these markers. The 15 chloroplast SSRs were effective in differentiating between B-type, D-type, and barley (Hordeum vulgare) cytoplasms. Genetic distance estimates were determined for each pair of lines studied and analyzed using UPGMA clustering. The markers revealed five plastomic types within the B-type cytoplasm studied. Several lines of wheat in this germplasm, including important PNW cultivars like Madsen, were found to contain D-type cytoplasm rather than the B cytoplasm of wheat. Nuclear SSR assays using 24 markers revealed three major clusters of germplasms: PNW soft white winter wheat, Western European-derived lines, and Great Plains accessions, as well as two clusters of more distantly related lines and genetic stocks. The primary defining characteristic of these clusters was regional adaptation. Subgroups of these major groups often clustered together on the basis of pedigree and market class. When nuclear and chloroplast SSR data was combined in analysis, the primary defining characteristic of the dendrogram became the type of cytoplasm rather than regional adaptation, with secondary divisions based on pedigree relationships. Cultivars released prior to 1950 were found to have a minimum of 20% of alleles in common for nuclear and chloroplast data combined, despite being unrelated via pedigree information. Heterogeneity was 2.3% for all marker/variety combinations. Overall, these sets of markers were found to be effective in characterizing the genetic relatedness of PNW wheat breeding germplasm. / Graduation date: 2003
52

Exploring college students' understanding of diversity : the effect of experience, interventions, and encapsulation

Versluis, Diana Omura 04 June 2001 (has links)
This study sought to understand how post-secondary students experience and process issues of diversity, to discover what those views of diversity are, and how those views might change. The two issues that participants felt most strongly about were homosexuality and scholarships for students of color. Their views on homosexuality ranged from admitted homophobia, to ambivalence, to tolerance, to full acceptance. Religion seemed to play a part among those who were ambivalent, but not for those who were homophobic. Views were not static, but shifted depending on the circumstances. A participant who might object to a homosexual serving in the military might have no problem having a homosexual as a neighbor. Regarding scholarships for students of color, some of the 27 White students agreed that this was fair, while others seemed to resent the idea and questioned its need. Two of the four multi-racial students were somewhat sympathetic to the latter view. A high degree of acceptance on one diversity issue did not necessarily mean high acceptance on other issues. A participant who advocated for gays to have equal admittance and acceptance in the military was against scholarships for students of color. Participants' views were most influenced by their personal experiences. Interventions such as coursework, workshop, panel presentation, and social contact seemed to have a less influence than personal experiences. Those pivotal moments, as discussed by Young Y. Kim, seemed to have caused stress, adaptation, and growth, which resulted in a greater awareness of an issue, of themselves, and of others. The rejection of experiences and interventions might be explained by encapsulation, as proposed by C. Gilbert Wrenn. Encapsulated individuals seem to choose to reject information or experiences that might challenge their views. The implication for educators is to provide more opportunities for students to have personal experiences involving diversity that might lead to pivotal moments. Thirty-one undergraduates at a small, liberal arts university in the Pacific Northwest were interviewed three times over an average of seven weeks. All had participated in a nationally known diversity workshop and had also participated in regular courses that addressed diversity issues. / Graduation date: 2002
53

Reflections on change : a community-college faculty perspective

Zmetana, Katherine 27 March 2002 (has links)
This phenomenological research study focused on educational change as perceived by 16 Liberal Arts faculty members at a Pacific Northwest community college. Research data were collected through in-depth dialogic interviews and a follow-up dialogue session with six participants. The principal guiding research questions comprised the following: 1) What is the context of the community college? The institution is facing severe budgetary restrictions, widening diversity of students, the implementation of new technologies and distance learning, changing faculty and administrator roles, competition from the private sector, and the redefining of the community college role. 2) What is the background of the faculty participants? In the past, faculty have experienced a collegial culture and a shared sense of purpose, which no longer seems to exist. Their values are deeply connected to the social responsibilities of education and student needs, which they feel is at odds with the trend toward commodification of education. 3) What are faculty's perceptions of change and its effects? Change is constant; and instructors adapt incrementally. Mandated changes are seen to have fuzzy meanings and hidden agendas, which sometimes go against the core values of higher education. 4) What do faculty want? Faculty want to wrestle with the issues and solutions for dealing with change collaboratively, and they need the time and space to do so. They also want administrators to hear their voice, and to include faculty priorities in educational decision-making. Faculty participants had clear ideas on ways that would make the implementation of change more successful and meaningful in their lives and in the future of their community college: 1) Make change for a worthy or merited purpose. 2) Listen to what faculty have to say. 3) Allow faculty to wrestle with the challenges. 4) Provide faculty with support and recognition. 5) Keep student needs as a central priority. 6) Maintain the human values and social purpose of education. Most important, faculty feel that the human element cannot be discounted or forgotten in the rush to transform higher education, for faculty are the ones charged with the implementation of most change initiatives and they must deal with the consequences. / Graduation date: 2002
54

Possible compensations of the components of grain yeild in wheat (Triticum aestivum L.) as influenced by genotype by environment interactions

Bedoshvili, David 14 June 1999 (has links)
Despite many investigations genotype by environment interaction remains one of the least understood factors in plant improvement. Understanding genotypic differences responsible for such interactions could assist in making more informed breeding decisions. The components of yield being less complex than grain yield per se may be useful for selection to improve adaptation of genotypes and enhance grain quality. However, the potential compensatory response among the components of yield could compromise their usefulness as selection criteria. To evaluate this aspect fifteen cultivars, including Soft White, Hard White and Hard Red wheats, were planted at three diverse locations over two growing seasons. Genotypes were ranked based on measurements for specific traits in each environment. The genotype by environment interaction for grain yield, protein concentration and hardness were investigated according to the AMMI model. Influence of environmental factors and genotype by environment interactions on associations among selected traits were determined. The results of this study showed that genotypic differences in adaptation to the Pacific Northwest and resistance to Septoria spp. were responsible for interactions for grain yield. However, no consistent patterns of response were found among the similar cultivars for quality traits. Those environments that favored expression of biomass and grain weight potential provided for enhanced performance of the adapted cultivars. The environments with suppressed biomass accumulation and grain filling interacted positively with the unadapted cultivars. A large compensatory relationship between tillering and apical growth was detected. No or low compensation was observed between grains per spike and thousand kernel weight. Two different strategies were proposed for improvement of Soft and Hard White wheat cultivars under the conditions of the Pacific Northwest. Both strategies accentuate importance of increasing biomass while maintaining harvest index. When selecting for higher yielding Soft White cultivars, plants with larger leaves, stronger stems, larger spikes and heavier grains should be emphasized. For Hard Whites - higher number of tillers and grains m����� is desired, as they provide for harder grains with higher protein content. / Graduation date: 2000
55

The effects of the Mazama tephra-falls : a geoarchaeological approach

Matz, Stephan E. 28 May 1987 (has links)
About 7,000 years ago two major tephra-falls blanketed the Pacific Northwest in volcanic ash. These two tephra-falls, identified as the Llao and climatic tephra-falls, were a part of the eruptive events that led up to the collapse of Mount Mazama to form Crater Lake in the southern Oregon Cascades. The tephra-falls occurred about 200 years apart at around 7,000 years B.P. and 6,800 years B.P. for the Llao and climatic eruptions respectively. The effects of the tephra-falls on the flora, fauna, and people of the period have been characterized by different researchers as ranging from minimal to catastrophic. In an attempt to better understand the affects of these two events on the flora, fauna, and people, a model is presented to help organize the various lines of research into a coherent whole and to suggest profitable areas of research which have not yet been completed. The model is based on ecological and anthropological theory with a strong reliance on analogy with modern ecosystems and volcanic hazards research. The model makes use of the ecosystem concept as the framework for the interaction of the abiotic, or nonliving habitat, with the biotic, or living system. The biotic organisms are adapted to the characteristics of the abiotic habitat and in many respects the composition, frequencies, and distributions of biotic organisms are determined by their tolorance levels to these characteristics. Tephra-falls act as environmental disturbances which change the abiotic habitat of the ecosystem. Therefore, any changes caused by such a disturbance in the abiotic characteristics that are not optimal or are outside of the tolorance limits of the biotic (flora and fauna) components should cause changes in the composition, distribution, and frequency of organisms within the ecosystem. The changes brought about by the tephra-falls may be described by successional and evolutionary processes through analysis of pollen and faunal remains, population demography as described by mortality profiles, and research into the reaction of specific flora and fauna within adaptational types to the properties of tephra-falls and the tephra as a soil body. The state factors used to describe the abiotic component of the ecosystem are: time, distribution, material properties, climate, and geomorphology. The state factor of time involves the determination of the occurrence in time of the event(s), the duration of the event(s), the season of occurrence of the event(s), and the residence time of tephra in the ecosystem. This state factor is used to define the specific point in time and duration of the effects of the tephra-fall(s) for individual ecosystems. The state factor of distribution describes the aerial extent and thickness of the air-fall deposits. This state factor determines the extent of the initial disturbance. The state factor of climate describes the specific components of rainfall, wind, and temperature which control ecosystem composition and development, and the changes to the climate which may have occurred due to volcanic aerosols associated with the eruption. The state factor of geomorphology describes the location of tephra and nontephra bodies across the landscape and through time as the tephra is reworked by wind, water, and gravity from the initial air-fall positions. The determination of the long term distribution of the tephra is important in determining post-event influences on ecosystems as described by the material properties of the tephra. It is argued that most people were not greatly harmed by the Mazama tephra-fall events themselves, but instead may have been greatly affected by a loss of food resources during and after the events. Changes in food resource availability and exploitation locations due to the tephra-falls may have resulted in changes in both settlement and subsistence activities. Changes in settlement and subsistence activities may be seen in a corresponding change in differential frequencies of functional tool types across space and time. The kind and amount of expected changes in settlement and subsistence systems are linked to distance from the source of the tephra, the stability and compostion of pre-disturbance ecosystems, the types and intensity of resource exploitation, and the amount of variability in subsistence and settlement traits which were available to the sociocultural system. / Graduation date: 1988
56

Cultural resource protectors : a survey of federal archaeologists and cultural resource specialists in the Pacific Northwest

Schmidt, Chester Allan 26 April 1994 (has links)
There is a widespread problem with looting and vandalism of cultural resources in the Pacific Northwest. To combat this problem law enforcement must have the assistance of the archaeological community. To be able to assist law enforcement, archaeologists and cultural resource specialists must have the proper training in cultural resource law and crime prevention. The focus of this study is to investigate the preparedness of archaeologists and cultural resource specialists within the federal government, specifically the United State Forest Service and the Bureau of Land Management, to assist in the investigation and prevention of cultural resource crime. To answer this question a survey was sent out to all of the aforementioned subjects within the Pacific Northwest. This survey asked for data concerning types of cultural resources affected by crime, prevention methods, training, opinions on quality of training, and demographic information. The respondent was also asked to reply to various fictitious scenarios concerning cultural resource crime, and the answers compared to a control group made up of law enforcement personnel. Information obtained from this survey showed that there is a lack of training among both of these agencies. A large percentage of the respondents feel that their training was either nonexistent or was lacking in depth and quality. The ability of the subject group to make decisions concerning the fictitious scenarios was closely analogous to those made by the law enforcement group. However, from information obtained from the respondents and from analysis of other data these scenarios may not have been a good indicator of the preparedness of the subject group. To improve their abilities at preventing and assisting in the investigation of cultural resource crimes, all archaeologists and cultural resource specialists need to have the opportunity to have access to quality training. These persons must also take it upon themselves to protect the resource using methods that are allowed by their respective agencies. / Graduation date: 1994
57

Culturally appropriate supermarket nutrition education for Mexican-American families

Saldana, Tina Marie 24 November 1992 (has links)
Graduation date: 1993
58

Estimated expenditures by sport anglers and net economic values of salmon and steelhead for specified fisheries in the Pacific Northwest

Sorhus, Colin 16 December 1980 (has links)
Graduation date: 1981
59

Independent Filmmaking in the Pacific Northwest: A Critical Analysis of the Regional Film Landscape / Critical Analysis of the Regional Film Landscape

Erickson, Mary P. A., 1977- 06 1900 (has links)
xvii, 397 p. : ill., maps. / Thousands of films are produced every year in the United States, and only a fraction of these is made by mainstream Hollywood film studios. Independent filmmakers working in regional locations produce the majority of these films, retaining financial, creative and distribution control and working with locally-based cast and crew members. This film activity must be acknowledged in order to fully understand the American film industry. This study examines regional independent filmmaking through case studies of two film communities: Portland, Oregon and Seattle, Washington. Using political economy of communication as the primary theoretical foundation, this study focuses on the infrastructure (systems, policies, resources and practices) that supports and/or limits the production and distribution of independent films. The research utilizes extensive document analysis of historical materials and contemporary documents produced by organizations and individuals, as well as a survey of 60 film professionals and interviews with over 40 film professionals. A central challenge to independent filmmaking is the term "independent," which has been contested by film professionals and scholars; therefore, this study analyzes and offers a new definition of "independent filmmaking." The history of filmmaking activity in Portland and Seattle is presented, as well as an extensive discussion of the contemporary landscape of regional independent filmmaking in these two communities. The study finds that there are a multitude of contradictions pertaining to financing, distribution, labor and myths of independent filmmaking. These contradictions present a range of opportunities and challenges that often simultaneously conflict with each other. The filmmaking communities in Portland and Seattle have notable networks of support, including professional and educational organizations, film festivals, government initiatives and a few locally-operated distributors. However, filmmakers in both cities also share challenges in financing, distribution and labor. The study argues that regional independent filmmaking has made a dynamic and influential contribution to the American film industry and cultural production but has been under-explored in academic scholarship. The research also points to the need to examine and understand the contradictions of independent filmmaking to improve the circumstances and infrastructure that support regional independent filmmaking. / Committee in charge: Dr. Janet Wasko, Chairperson; Dr. Gabriela Martinez, Member; Dr. H. Leslie Steeves, Member; Dr. Michael Aronson, Outside Member
60

Criteria for an effective water resource planning process

Bowers, James Myron January 1961 (has links)
Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of City and Regional Planning, 1961. / Includes bibliographical references (leaves 171-178). / In examining the present status of water resource planning in the Pacific Northwest, numerous critical inadequacies become readily apparent. One method of minimizing some of these inadequacies is through administrative reorganization. Realizing this there have been many different reorganization proposals put forth. Along with these proposals has come much propaganda. In order to obtain a clearer picture comparative criteria were established. Upon doing this it was decided to limit the analysis to the compact, the authority and the inter-agency approaches. Upon applying the criteria to these three structures, the following conclusions were reached: 1) the compact would probably be worse than the existing setup, 2) the inter-agency committee has some value and not too many dangers, 3) the authority fulfills by far the most criteria but because of certain possible dangers should not be strived for, 4) that the criteria are useful in discovering which structures may be unacceptable but they do not tell which is the optimum one. Much is dependent upon the type of planners the structures attract. / by James Myron Bowers. / M.C.P.

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