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You searched for subject:(Effective force field). Showing records 1 – 3 of 3 total matches.

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University of Toronto

1. Fayaz Movahed, Hamidreza. Gradient-doped Thermophotovoltaic Devices based on Colloidal Quantum Dots.

Degree: 2016, University of Toronto

Electromagnetic radiation emitted from hot objects represents a sizeable supply of energy; however, even for relatively hot bodies, its flux peaks in the short-wavelength infrared between 1 and 3 µm, standing in the way of its photovoltaic harvest using the most widely-available optoelectronic materials such as Si and CdTe. Colloidal quantum dots combine low-cost solution-processing with bandgap tunability in this spectral region, thereby offering a route to harnessing thermal power photovoltaically. Here we report thermophotovoltaic devices constructed using colloidal quantum dots that harvest infrared radiation from an 800°C blackbody source. Only by constructing a gradient-doped colloidal quantum dot thermophotovoltaic device were we able to achieve thermophotovoltaic power generation with a power conversion efficiency of 0.39%. The device showed stable operation at ambient temperatures above 100°C.

M.A.S.

Advisors/Committee Members: Sargent, Edward H, Electrical and Computer Engineering.

Subjects/Keywords: Colloidal quantum dot; Effective force field; Gradient-doped; Infrared; Thermophotovoltaics; 0652

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Fayaz Movahed, H. (2016). Gradient-doped Thermophotovoltaic Devices based on Colloidal Quantum Dots. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/72699

Chicago Manual of Style (16th Edition):

Fayaz Movahed, Hamidreza. “Gradient-doped Thermophotovoltaic Devices based on Colloidal Quantum Dots.” 2016. Masters Thesis, University of Toronto. Accessed January 23, 2020. http://hdl.handle.net/1807/72699.

MLA Handbook (7th Edition):

Fayaz Movahed, Hamidreza. “Gradient-doped Thermophotovoltaic Devices based on Colloidal Quantum Dots.” 2016. Web. 23 Jan 2020.

Vancouver:

Fayaz Movahed H. Gradient-doped Thermophotovoltaic Devices based on Colloidal Quantum Dots. [Internet] [Masters thesis]. University of Toronto; 2016. [cited 2020 Jan 23]. Available from: http://hdl.handle.net/1807/72699.

Council of Science Editors:

Fayaz Movahed H. Gradient-doped Thermophotovoltaic Devices based on Colloidal Quantum Dots. [Masters Thesis]. University of Toronto; 2016. Available from: http://hdl.handle.net/1807/72699

2. Zimmerman, Peter. Self-force in Non-vacuum Spacetimes: Theory and Applications .

Degree: 2015, University of Guelph

In the past, the formulation of the gravitational self-force problem has been restricted to background spacetimes which are devoid of additional matter fields. The solutions describing these geometries obey the vacuum Einstein field equations and the motion of test-particles is geodesic. While the vacuum formulation may be adequate for characterizing extreme mass ratio inspirals around black holes, which form the most promising candidates for the proposed space-based gravitational wave detector (e)LISA, many phenomena require contending with extra fields. For example, one may wish to consider the motion of a small charged body through the magnetosphere of a larger object as it inspirals, which would require modeling the combined effects of the electromagnetic and gravitational perturbations created by the small body. The non-vacuum gravitational self-force will also play an important role in describing the motion of small bodies in alternative theories of gravity, where the gravitational field is mediated by both the spacetime metric and additional fields. Moreover, the non-vacuum self-force is needed to test whether a Reissner-Nordro ̈m black hole can be driven to an overcharged state by bombarding it with a charged particle. In this thesis, we provide a foundational framework for tackling these problems through a sequence of formal derivations of the first-order self-force in non-vacuum spacetimes containing additional matter fields with integer little group representations. Specifically, we present two derivations: one based on regular solutions to the linearized field equations, and the other following from effective field theory principles. Both derivations utilize a novel “meta-index” notation to collect the fields into a single“super-field” which streamlines the analysis. The formalism is then applied to the scalarvac and electrovac spacetimes as concrete scenarios. We then derive the first-order self-force in scalar-tensor theory of gravity and mention the prospect of constraining the theory using the result. We also find that both the mass and effective charge of the particle in scalar-tensor theory evolve due to the self-field, indicating that scalarization phenomena are exhibited in the extreme mass ratio inspiral problem. Advisors/Committee Members: Poisson, Eric (advisor).

Subjects/Keywords: self-force; non-vacuum spacetime; relativistic motion; classical effective field theory

field theory approach to the self-force problem. We now outline the historical development of… …combination, and that the regular field that is responsible for the self-force came from the time… …the gravitational self-force and are identical to (1.7) with the regular field… …axiomatic approach which regularized the field by comparing the angle-averaged force in two… …zero force. Later, alternative methods based on the effective field theory formalism [66… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Zimmerman, P. (2015). Self-force in Non-vacuum Spacetimes: Theory and Applications . (Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9079

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Zimmerman, Peter. “Self-force in Non-vacuum Spacetimes: Theory and Applications .” 2015. Thesis, University of Guelph. Accessed January 23, 2020. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9079.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Zimmerman, Peter. “Self-force in Non-vacuum Spacetimes: Theory and Applications .” 2015. Web. 23 Jan 2020.

Vancouver:

Zimmerman P. Self-force in Non-vacuum Spacetimes: Theory and Applications . [Internet] [Thesis]. University of Guelph; 2015. [cited 2020 Jan 23]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9079.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zimmerman P. Self-force in Non-vacuum Spacetimes: Theory and Applications . [Thesis]. University of Guelph; 2015. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9079

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of Technology, Sydney

3. Mackay, BJ. An analysis of forces influencing innovative roles in primary health care nursing.

Degree: 2005, University of Technology, Sydney

The reorientation of health care systems towards a primary health care focus provides opportunities for the development of new or expanded nursing services. While considerable literature exists on nurse practitioner (NP) and new innovative roles in general, little has been written about influences on the development of innovative roles in primary health care nursing. An analytical tool of Force Field Analysis was used to identify and describe forces influencing the development of innovative roles, including the NP role, in primary health care nursing. At the commencement of the study an initial analysis of research, literature and policy identified forces driving or restraining the development of innovative roles. A mixed research method of surveys and focus group interviews with key stakeholders, namely nurses in innovative roles, General Practitioners and nurse leaders, was then used to identify factors influencing development within the Northland District Health Board (NDHB) of New Zealand. Descriptive statistics and interpretative methods were used to analyse the data. A final analysis enabled a picture of forces influencing innovative role development to be presented. Driving forces reflected international trends and were strongly influenced by economics and a political imperative to reconfigure health care services towards a primary health focus. The Treaty of Waitangi was also a key influence. Driving forces had greatest impact on the development of new roles. Forces were identified as drives towards cost- effective evidence-based health care (effective services), equity for Maori, response to local needs and workforce reorganisation. The major forces restraining the development of innovative roles were reinforced by attitudes, customs and support systems. These forces were identified as poor professional identity and support, an outdated nursing image, inadequate education and training and slow transition from traditional practices and structures (tradition). These forces had a negative influence on support for innovative roles. Promotion of Kaupapa Maori, involvement of the local community, local Maori and nursing in decision-making and promotion of a team culture have the potential to support further development of innovative roles. Political ideology and the Treaty of Waitangi will continue to be major influences directed through policy and the contracting and funding process. Nurses must develop their political astuteness and be ready to influence decision-making within their organisations, within primary health organisations and within the NDHB. This requires the development of leadership at all levels. A strong regional nurse leader network, development of individual nurses leadership competencies, development of education opportunities and support from strong leadership at a national level, has the potential to reduce restraining forces and positively influence the future introduction and support of innovative roles. This work provides a research basis from which nurse leaders, the NDHB and others…

Subjects/Keywords: Primary health care nursing.; Innovative roles.; Force Field Analysis.; Northland District Health Board (NDHB), New Zealand.; Treaty of Waitangi.; Cost- effective evidence-based health care.; Equity for Maori.; Response to local needs.; Workforce reorganisation.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Mackay, B. (2005). An analysis of forces influencing innovative roles in primary health care nursing. (Thesis). University of Technology, Sydney. Retrieved from http://hdl.handle.net/10453/37530

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Mackay, BJ. “An analysis of forces influencing innovative roles in primary health care nursing.” 2005. Thesis, University of Technology, Sydney. Accessed January 23, 2020. http://hdl.handle.net/10453/37530.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Mackay, BJ. “An analysis of forces influencing innovative roles in primary health care nursing.” 2005. Web. 23 Jan 2020.

Vancouver:

Mackay B. An analysis of forces influencing innovative roles in primary health care nursing. [Internet] [Thesis]. University of Technology, Sydney; 2005. [cited 2020 Jan 23]. Available from: http://hdl.handle.net/10453/37530.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mackay B. An analysis of forces influencing innovative roles in primary health care nursing. [Thesis]. University of Technology, Sydney; 2005. Available from: http://hdl.handle.net/10453/37530

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.