92 research outputs found
Network partitioning algorithms for electricity consumer clustering
No full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: S.M. in Technology and Policy, Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, Technology and Policy Program, 2018Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 97-103).In many developing countries, access to electricity remains a significant challenge. Electrification planners in these countries often have to make important decisions on the mode of electrification and the planning of electrical networks for those without access, while under resource constraints. To facilitate the achievement of universal energy access, the Reference Electrification Model (REM), a computational model capable of providing techno-economic analysis and data-driven decision support for these planning efforts, has been developed. Primary among REM's capabilities is the recommendation of the least-cost mode of electrification - i.e by electric grid extension or off-grid systems - for non-electrified consumers in a region under analysis, while considering technical, economic and environmental constraints.This is achieved by the identification of consumer clusters (either as clusters of off-grid microgrids, stand-alone systems or grid-extension projects) using underlying clustering methods in the model. This thesis focuses on the development and implementation of partitioning algorithms to achieve this purpose. Building on previously implemented efforts on the clustering and recommendation capabilities of REM, this work presents the development, analysis and performance evaluation of alternative approaches to the consumer clustering process, in comparison with REM's previously incorporated clustering methodology. Results show that the alternative methodology proposed can compare favorably with the hitherto implemented method in REM. Consequently, the integration of the pro- posed network partitioning procedures within REM, as well as some potential future research directions, is discussed.Finally, this thesis concludes with a discourse on the social and regulatory aspects of energy access and electricity planning in developing countries, providing some perspectives on the development policies and business models that complement the technological contributions of this work.by Olamide Oladeji.S.M. in Technology and PolicyS.M.S.M.inTechnologyandPolicy Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, Technology and Policy ProgramS.M. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Scienc
Building Belonging Through Radical Empathy: A Conversation with Terri Givens, Author of Radical Empathy
No full textCan people who seem radically different engage in constructive conversations and relationships? This webinar\u27s answer is in the affirmative, as it focuses on Professor Terri Givens\u27 Book Radical Empathy - Find A Path to Bridging Racial Divides (Bristol University Press, 2022).
The concept of radical empathy is the foundation to better understand each other and build a community of belonging at Duquesne University, for students, faculty, administrators, and staff members. Together, we can!
Sponsored by the Chief Diversity Officer and Advisor to the President and the Duquesne Kline School of Law\u27s Center for Legal Information.
Main SpeakerTerri Givens, Ph.D. Professor of Political Science at McGill University; founder Center for Higher Education Leadership and Brighter Professional Development
Welcoming RemarksApril M. Barton, J.D., Dean and Professor of Law, Thomas R. Kline School of Law of Duquesne University
Introduction of SpeakersCrystal McCormick Ware, Inaugural Chief Diversity Officer and Senior Advisor to the President for Diversity, Equity and Inclusion
PanelistsKaia Niambi Shivers, Ph.D., NYU Professor
Ian Edwards, Ph.D., Licensed Psychologist and AVP for Student Wellbeing, Duquesne University
Akwasi Opoku-Dakwa, Ph.D., Assistant Professor of Management, Duquesne University Palumbo-Donahue School of Business
Kim Nayyer, Edward Cornell Librarian, Associate Dean for Library Services and Professor of Practice, Cornell University
Dana Neacsu, LL.M., Ph.D., Associate Professor of Legal Skills, Thomas R. Kline School of Law of Duquesne University
Olamide Owoweye, 3L, Thomas R. Kline School of Law of Duquesne University
ModeratorQuincy Stephenson, LSW, Director of Diversity and Inclusions, Center for Excellence in Diversity and Student Inclusion
Program OrganizersCrystal McCormick Ware, Inaugural Chief Diversity Officer and Senior Advisor to the President for Diversity, Equity and Inclusion
Dr. Valeria Harper, Director of Inclusive Excellence, Thomas R. Kline School of Law of Duquesne University
Dana Neacsu, LL.M., Ph.D., Associate Professor of Legal Skills, Thomas R. Kline School of Law of Duquesne Universit
Effects of glaucoma drugs on ocular hemodynamics in normal tension glaucoma: a randomized trial comparing bimatoprost and latanoprost with dorzolamide ISRCTN18873428-1
No full text<p><b>Copyright information:</b></p><p>Taken from "Effects of glaucoma drugs on ocular hemodynamics in normal tension glaucoma: a randomized trial comparing bimatoprost and latanoprost with dorzolamide [ISRCTN18873428]"</p><p>BMC Ophthalmology 2005;5():6-6.</p><p>Published online 5 Apr 2005</p><p>PMCID:PMC1087849.</p><p>Copyright © 2005 Zeitz et al; licensee BioMed Central Ltd.</p>olamide led to a statistical increase of PSV
Study of a four dimensional Willmore-type energy
No full textThe Willmore energy is a well known geometric quantity which measures the sphericity of a surface. In this thesis, we study a four dimensional generalisation of the Willmore energy. We show that critical hypersurfaces of this four dimensional energy are smooth (no spikes)
Rigidity Result for Four Dimensional Willmore Submanifolds with Boundary
No full textWe establish a rigidity result for the critical points, with boundary, of a
four dimensional Willmore energy. These critical points satisfy a 4-Willmore
equation which is a sixth order nonlinear elliptic partial differential
equation. We establish several curvature estimates and prove that four
dimensional Willmore submanifold with totally geodesic boundary condition are
umbilic
Generalised Local Fractional Hermite-Hadamard Type Inequalities on Fractal Sets
No full textFractal geometry and analysis constitute a growing field, with numerous applications, based on the principles of fractional calculus. Fractals sets are highly effective in improving convex inequalities and their generalisations. In this paper, we establish a generalised notion of convexity. By defining generalised φh-s convex functions, we extend the well known concepts of generalised convex functions, P-functions, Breckner s-convex functions, h-convex functions amongst others. With this definition, we prove Hermite-Hadamard type inequalities for generalised φh-s convex mappings onto fractal sets. Our results are then applied to probability theory.</jats:p
Generalised Local Fractional Hermite-Hadamard Type Inequalities on Fractal Sets
No full textFractal geometry and analysis constitute a growing field, with numerous
applications, based on the principles of fractional calculus. Fractals sets are
highly effective in improving convex inequalities and their generalisations. In
this paper, we establish a generalized notion of convexity. By defining
generalised convex functions, we extend the well known concepts of
generalised convex functions, -functions, Breckner -convex functions,
-convex functions amongst others. With this definition, we prove
Hermite-Hadamard type inequalities for generalized convex mappings
onto fractal sets. Our results are then applied to probability theory
Fractional Integral Estimates of Hermite-Hadamard type in Global Nonpositive Curvature Spaces
No full textWe extend the notion of convexity of functions defined on global nonpositive
curvature spaces by introducing (geodesically) -convex functions. We prove
estimates of Hermite-Hadamard type via Katugampola's fractional integrals. We
obtain an important corollary which gives an essentially sharp estimate
involving squared distance mappings between points in a global NPC space. This
is a contribution to analysis on spaces with curved geometry
Some amenability properties on segal algebras.
No full textMaster of Science in Mathematics, Statistics and Computer Science. University of KwaZulu-Natal, Durban 2017.It has been realized that the definition of amenability given by B. E. Johnson in
his Classical Memoir of American Mathematical Society in 1972 is too restrictive
and does not allow for the development of a rich general theory. For this reason,
by relaxing some of the constraints in the definition of amenability via restricting
the class of bimodules in question or by relaxing the structure of the derivations,
various notions of amenability have been introduced after the pioneering work
of Johnson on amenability in Banach algebras. This dissertation is focused on
six of these notions of amenability in Banach algebras, namely: contractibility,
amenability, weak amenability, generalized amenability, character amenability and
character contractibility. The first five of these notions are studied on arbitrary
Banach algebras and the last two are studied on some classes of Segal algebras.
In particular, results on hereditary properties and several characterizations of
these notions are reviewed and discussed. Indeed, we discussed the equivalent
of these notions with the existence of a bounded approximate diagonal, virtual
diagonal, splitting of exact sequences of Banach bimodules and the existence of a
certain Hahn-Banach extension property. Also, some relations that exist between
these notions of amenability are also established. We show that approximate contractibility
and approximate amenability are equivalent. Some conditions under
which the amenability of the underlying group of a Segal algebra implies the character
amenability of the Segal algebras are also given. Finally, some new results
are obtained which serves as our contribution to knowledge
Three essays examining financial well-being of older Americans
No full textThis dissertation explored the subjective and objective financial well-being of older Americans using the Health and Retirement Study (HRS). The first essay examines the impact of retirement on financial satisfaction. This study finds that retiring (a change from active work life to retirement) is negatively associated with financial satisfaction. However, results show that going back to the workforce from 2008 to 2012 is negatively related to being financially satisfied.
The second essay uses 2008, 2012, and 2016 waves of the HRS through Structural Equation Modeling (SEM) to investigate if financial self-efficacy mediates the relationship between emotions and financial satisfaction and if this differs for retirees and pre-retirees. Results show that negative emotions predict financial satisfaction negatively through financial self-efficacy for retirees. However, for the pre-retirees, no statistically significant mediation relationship is found.
Finally, the third essay explores the role of personality traits in explaining the disparity between perception and reality of the financial situation. Findings from this study show that conscientious and extroverted individuals perceive their financial situation o be higher than it is objectively. Conversely, individuals who exhibit traits relating to neuroticism, openness to experience, and agreeableness think their financial situation is worse than it is objectively. These findings have implications for individuals, households, and financial professionals while working with clients.Embargo status: Restricted until 06/2172. To request the author grant access, click on the PDF link to the left
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