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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.
391

Vegetable storage, respiration and design criteria in a membrane storage system

Plasse, Robert. January 1986 (has links)
No description available.
392

Topics in Wind Farm Layout Optimization: Analytical Wake Models, Noise Propagation, and Energy Production

Zhang, Yun 17 July 2013 (has links)
Wind farm layout optimization (WFLO) is the design of wind turbine layout, subject to various financial and engineering objectives and constraints. The first topic of this thesis focuses on solving two variations of WFLO that have different analytical aerodynamic models, and illustrate deep integration of the wake models into mixed-integer programs and constraint programs. Formulating WFLO as MIP and CP enables more quantitative analysis than previous studies could do with heuristics, and allows the practitioners to use an off-the-shelf optimization solver to tackle the WFLO problem. The second topic focuses on another version of WFLO that has two competing objectives: minimization of noise and maximization of energy. A genetic algorithm (NSGA-II) is used. Under these two objectives, solutions are presented to illustrate the flexibility of this optimization framework in terms of supplying a spectrum of design choices with different numbers of turbines and different levels of noise and energy output.
393

Topics in Wind Farm Layout Optimization: Analytical Wake Models, Noise Propagation, and Energy Production

Zhang, Yun 17 July 2013 (has links)
Wind farm layout optimization (WFLO) is the design of wind turbine layout, subject to various financial and engineering objectives and constraints. The first topic of this thesis focuses on solving two variations of WFLO that have different analytical aerodynamic models, and illustrate deep integration of the wake models into mixed-integer programs and constraint programs. Formulating WFLO as MIP and CP enables more quantitative analysis than previous studies could do with heuristics, and allows the practitioners to use an off-the-shelf optimization solver to tackle the WFLO problem. The second topic focuses on another version of WFLO that has two competing objectives: minimization of noise and maximization of energy. A genetic algorithm (NSGA-II) is used. Under these two objectives, solutions are presented to illustrate the flexibility of this optimization framework in terms of supplying a spectrum of design choices with different numbers of turbines and different levels of noise and energy output.
394

The Experience of Ontario Farm Families Engaged in Agritourism

Ainley, Suzanne Elizabeth January 2012 (has links)
This phenomenological study explored the experiences of farm families starting and operating agritourism. Many extant studies of agritourism have privileged positivistic methodologies and quantitative approaches. To better understand the lived experiences of farm families who have started and embrace agritourism and to fully appreciate the intertwined and complex nature of the various factors involved within the family, a more interpretative approach was required. Interpretative Phenomenological Analysis(IPA) guided the design, analysis, and overall implementation of the study. Phenomenology allowed meaningful experiences and essential structures associated with the phenomenon of agritourism, from the perspective of those directly involved in it, to be fully and deeply explored. In this study, three multi-generational farm families actively engaged in agritourism within Ontario participated. Unlike previous agritourism studies which just involved one family member, usually the farmer, as many members of each farm family as possible were included in this study. A total of 17 members across the three families participated and data were collected through a combination of on-site observations and active interviews. Beginning with a simple introductory question of each participant, “Can you tell me how agritourism got started on your farm”, a number of themes emerged. By taking an interpretative stance, the individual themes were further baled into six super-ordinate themes: • Retailing, Educating, Entertaining– describing agritourism; • Being the Face of Farming–the re-connecting of farms and farmers to consumers; • We Are the Farm–impressions about how agritourism is retaining and sustaining a farming identity while introducing unique challenges associated with embracing agritourism on the farm; • Family Comes First–speaking to the prevalence of economics as a reason for embracing agritourism, while also further exploring agritourism’s role in sustaining the family farm; • Coming Home–focuses on the inseparability of the farm as a place of residence and work where new challenges, opportunities, and attitudes towards intergenerational transfer of the farm emerge; and finally, • Becoming an Agritourism Farm–captures the incremental process and key watershed moments associated with switching into agritourism. By exploring the experience of agritourism from the perspectives of the families, our understanding of agritourism has been expanded, while some of our pre-existing beliefs and assumptions about agritourism are also challenged. Getting involved in agritourism was articulated by farm families as occurring through a series of smaller, incremental decisions usually over several years as the farm naturally took on new and additional activities and eventually evolved into an agritourism enterprise. The transition revealed the place – the farm, and the people integral and historically associated with it – as a productive agricultural space was changing into being consumptive spaces. The unplanned transition into agritourism affected the farmer as well as other members of the family. However, the transition also sustained a farming identity and way of life in an era of intense globalization and agricultural intensification. This study sheds light on how different members of the families have been involved in the process, as well as illuminated new perspectives on: how agritourism sustains key characteristics defining a family farm, how the farm re-engages with consumers, how an entrepreneurial spirit is fostered, and how continuous adaptation on the farm ensures its viability for future generations of the family.
395

A study of the literacy practices of rural farm male adolescents

Kelly, Brenda 06 1900 (has links)
Concerns have been expressed about assessment results that report girls outscoring boys on standardized achievement testing in reading and writing and boys outscoring girls in mathematics and science. This study explored how Western Canadian rural farm boys understand and practice multiple literacies in their everyday lives and what it means for them to be literate in todays world. The research was a qualitative ethnographic study of the culture of six rural farm boys. Thick description was used to explain the event and the context of the event. The fieldwork involved collecting print and digital artifacts that depicted the boys literacy practices and conducting interviews and conversations. The boys lead very literate lives. However, their notions of what literacy is are rooted in the ideas of literacy as a technical skill and literacy as school knowledge. The boys, who did not see themselves as readers, engaged in transactional reading and writing outside of school, motivated by personal and group interests and by a curiosity to learn knowledge about the world in which they live, a need to be with their peers, and a desire to build social capital in their settings. The boys used literacy to do the social work of gender, of defining themselves, and of placing themselves in their families and peer groups and among their schoolmates with a gendered identity. A gender-based disconnect in reading and writing activities has emerged from our schools. If we want students to embrace school-based print literacy and to make it part of their lives, then competence is simply not enough. Educators must find ways to help students discover pleasure in reading and writing well by offering them assignments and opportunities to recognize that what brings them pleasure is connected to experience, competence, and challenge. The chasm between school literacy and literacy for personal purposes demonstrates the need for curriculum designers to find ways to utilize the digital mode of communication. Curriculum writers must begin to view at literacy as a social practice rather than as a set of technical skills for these rural male adolescents to see themselves as literate people.
396

The evaluation of alternative decision models : a case of crop rotation in Northern Thailand / Crop rotation in Northern Thailand

Suppapanya, Pramote January 1994 (has links)
Thesis (Ph. D.)--University of Hawaii at Manoa, 1994. / Includes bibliographical references (leaves 144-151). / Microfiche. / xiii, 151 leaves, bound ill. 29 cm
397

Analysis of structure and operational efficiency in the distribution of fresh produce : a case study of the Hawaii produce distribution system / Hawaii produce distribution system

Olufokunbi, Banwo January 1977 (has links)
Typescript. / Thesis (Ph. D.)--University of Hawaii at Manoa, 1977. / Bibliography: leaves 335-341. / xxvii, 341 leaves ill
398

The Experience of Ontario Farm Families Engaged in Agritourism

Ainley, Suzanne Elizabeth January 2012 (has links)
This phenomenological study explored the experiences of farm families starting and operating agritourism. Many extant studies of agritourism have privileged positivistic methodologies and quantitative approaches. To better understand the lived experiences of farm families who have started and embrace agritourism and to fully appreciate the intertwined and complex nature of the various factors involved within the family, a more interpretative approach was required. Interpretative Phenomenological Analysis(IPA) guided the design, analysis, and overall implementation of the study. Phenomenology allowed meaningful experiences and essential structures associated with the phenomenon of agritourism, from the perspective of those directly involved in it, to be fully and deeply explored. In this study, three multi-generational farm families actively engaged in agritourism within Ontario participated. Unlike previous agritourism studies which just involved one family member, usually the farmer, as many members of each farm family as possible were included in this study. A total of 17 members across the three families participated and data were collected through a combination of on-site observations and active interviews. Beginning with a simple introductory question of each participant, “Can you tell me how agritourism got started on your farm”, a number of themes emerged. By taking an interpretative stance, the individual themes were further baled into six super-ordinate themes: • Retailing, Educating, Entertaining– describing agritourism; • Being the Face of Farming–the re-connecting of farms and farmers to consumers; • We Are the Farm–impressions about how agritourism is retaining and sustaining a farming identity while introducing unique challenges associated with embracing agritourism on the farm; • Family Comes First–speaking to the prevalence of economics as a reason for embracing agritourism, while also further exploring agritourism’s role in sustaining the family farm; • Coming Home–focuses on the inseparability of the farm as a place of residence and work where new challenges, opportunities, and attitudes towards intergenerational transfer of the farm emerge; and finally, • Becoming an Agritourism Farm–captures the incremental process and key watershed moments associated with switching into agritourism. By exploring the experience of agritourism from the perspectives of the families, our understanding of agritourism has been expanded, while some of our pre-existing beliefs and assumptions about agritourism are also challenged. Getting involved in agritourism was articulated by farm families as occurring through a series of smaller, incremental decisions usually over several years as the farm naturally took on new and additional activities and eventually evolved into an agritourism enterprise. The transition revealed the place – the farm, and the people integral and historically associated with it – as a productive agricultural space was changing into being consumptive spaces. The unplanned transition into agritourism affected the farmer as well as other members of the family. However, the transition also sustained a farming identity and way of life in an era of intense globalization and agricultural intensification. This study sheds light on how different members of the families have been involved in the process, as well as illuminated new perspectives on: how agritourism sustains key characteristics defining a family farm, how the farm re-engages with consumers, how an entrepreneurial spirit is fostered, and how continuous adaptation on the farm ensures its viability for future generations of the family.
399

The influence of tine geometrical factors on stubble handling with tined implements /

Slattery, Michael Gerard Unknown Date (has links)
Thesis (MEng (MechEng))--University of South Australia, 1999
400

Agronomic adaptation to environmental challenges in the genus Leucaena

Mullen, B. F. Unknown Date (has links)
No description available.

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