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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.
151

Toward a Pedagogy of Compassion: Extracting Principles of Education from Teaching a High School Multicultural Literature Class

Valverde, Carlos Roberto 01 July 2010 (has links) (PDF)
Based on the assumption by Cochran-Smith and Lytle (1993), educational scholars need insight on the “particulars” of what works for classroom teachers within the context of their own classrooms. This dissertation is a self-study that addresses my work as a high school Multicultural Literature teacher and the impact of how my own philosophical/theoretical belief system resulted in significant transformative learning experiences for students as demonstrated in their feedback. Using intercultural competence, value-creation pedagogy, and compassion as theoretical frameworks that encourage greater social cohesion and collective participation, I used autoethnography as my primary method of investigation to treat data through an analytical, self-reflective, and interpretive lens within the cultural context of my classes. Types of data included personal memory, self-observational, self-reflective, and external data, such as end of the year anonymous student evaluations, personal memoirs, journal entries, notes, course documents, past student assignments, personal communications, and a blog, collected from my 13 years of teaching. By sharing and examining my ethical/moral-motivation in relation to the positive feedback from students, I demonstrate how my pedagogical interactions and relationships with students manifest through value creation/culturally responsive pedagogy, the empowered voice, intercultural dialogue, transformative learning, and the development and nurturing of empathy and compassion. The study shares personal insights into the elements and processes that contributed to the overwhelmingly positive feedback of students throughout the study. Recommendations suggest greater research and discourse in developing a pedagogy of compassion.
152

Responsive Materials via Diels-Alder Chemistry

Strange, Gregory Alan 01 March 2012 (has links) (PDF)
The corrosion of infrastructure imposes a significant monetary cost, and at times human cost, upon society. Methods to improve corrosion resistance of materials are described herein which utilize the reversibility of the Diels-Alder reaction to impart thermal responsiveness upon materials. Such stimuli responsiveness can potentially play a role in self healing properties which lead to reduced cracking and thus increased corrosion protection. Reversible Diels-Alder chemistry was utilized to manipulate the surface energy of glass substrates. Hydrophobic dieneophiles were prepared and attached to glass slides and capillaries to yield a nonwetting surface. Thermal treatment of the surfaces cleaved the Diels-Alder linkage, and resulted in the fabrication of a hydrophilic surface. Preliminary analysis utilized contact angle (CA) measurements to monitor the change in surface energy, and observed a hydrophilic state (CA - 70±3°) before attachment of the dieneophile to a hydrophobic state (CA - 101±9°) followed by regeneration of the hydrophilic state (CA - 70±6°) upon cleavage of the Diels-Alder linkage. The treatments were then applied to glass capillaries, with effective treatment confirmed by fluid column measurements. Patterned treatments were also demonstrated to provide effective fluid flow gating. Reversible Diels-Alder linkages were incorporated into polymer thermoset binding resins in order to provide a means by which a crosslinked thermoset could undergo stimuli responsive reversible crosslinking. The binder systems which were utilized included two types of amine curing agents, polydimethylsiloxane (PDMS) and Jeffamine® polyetheramines (PEA), and two types of epoxy resins, EPON resin based on diglycidyl ether of Bisphenol-A and epoxidized soybean oil. Various dienes and dienophiles were employed to functionalize the selected binder systems and were met with various degrees of success. The synthetic technique which proved to be the most promising was the Diels-Alder modification of the epoxidized soybean oil.
153

Modeling, Analysis,and Design of Responsive Manufacturing Systems Using Classical Control Theory

Fong, Nga Hin Benjamin 26 April 2005 (has links)
The manufacturing systems operating within today's global enterprises are invariably dynamic and complicated. Lean manufacturing works well where demand is relatively stable and predictable where product diversity is low. However, we need a much higher agility where customer demand is volatile with high product variety. Frequent changes of product designs need quicker response times in ramp-up to volume. To stay competitive in this 21st century global industrialization, companies must posses a new operation design strategy for responsive manufacturing systems that react to unpredictable market changes as well as to launch new products in a cost-effective and efficient way. The objective of this research is to develop an alternative method to model, analyze, and design responsive manufacturing systems using classical control theory. This new approach permits industrial engineers to study and better predict the transient behavior of responsive manufacturing systems in terms of production lead time, WIP overshoot, system responsiveness, and lean finished inventory. We provide a one-to-one correspondence to translate manufacturing terminologies from the System Dynamics (SD) models into the block diagram representation and transfer functions. We can analytically determine the transient characteristics of responsive manufacturing systems. This analytical formulation is not offered in discrete event simulation or system dynamics approach. We further introduce the Root Locus design technique that investigates the sensitivity of the closed-loop poles location as they relate to the manufacturing world on a complex s-plane. This subsequent complex plane analysis offers new management strategies to better predict and control the dynamic responses of responsive manufacturing systems in terms of inventory build-up (i.e., leanness) and lead time. We define classical control theory terms and interpret their meanings according to the closed-loop poles locations to assist production management in utilizing the Root Locus design tool. Again, by applying this completely graphic view approach, we give a new design approach that determine the responsive manufacturing parametric set of values without iterative trial-and-error simulation replications as found in discrete event simulation or system dynamics approach. / Ph. D.
154

Waveguide Architectures in Stimuli-responsive Actuating Hydrogels

Vaughan, Kevin January 2024 (has links)
Waveguide architectures were inscribed within two different stimuli-responsive hydrogels capable of actuation. An electroactive hydrogel, which deforms when placed within an electric field, is demonstrated as a method for remote actuation and steering of light outputs. Lattices of waveguide with diameters on the microscale were embedded within hydrogel prisms, achieved through a nonlinear light propagation process known as self-trapping. This process is a result of balance between the natural divergence of light and self-focusing effects caused by an irreversible positive refractive index change during photopolymerization. Waveguiding structures are inscribed in the material because of this process. Square (2D) and near-cubic (3D) lattices were inscribed in hydrogel prisms, demonstrating the ability to remotely steer one or two light outputs simultaneously using an electric field. The overall optical effect is reminiscent of camouflaging techniques observed in marine creatures (ie. cephalopods). Additionally, a novel volumetric 3D printing technique previously demonstrated by the Saravanamuttu group was implemented to fabricate hydrogel cylinders capable of photothermal actuation. Coupling a thermoresponsive hydrogel material with a photoabsorber, areas irradiated by a light source are observed to contract. These contractions lead to the deflection of waveguiding cylinders towards the light source, reminiscent of the phototropic behaviours observed in particular plants (ie. sunflowers). The results of these studies provide insight for the fabrication of functional materials through nonlinear light propagation. Understanding these systems could provide knowledge for the fabrication of other stimuli-responsive materials with light-guiding properties. / Thesis / Master of Science (MSc)
155

Capital Improvements to Principal Leadership: Culturally Responsive District Strategies to Retain School Principals

Herman, Erica January 2022 (has links)
Thesis advisor: Vincent Cho / The purpose of this study was to explore the strategies districts use to retain principals in their complex roles through the framework of culturally responsive district leadership. This qualitative case study explored how district leaders in one Massachusetts school district focused on principal retention and whether their actions influenced a principal's decision to remain in their role. The study took place during a global health pandemic placing principals at the center of navigating this crisis. This study is part of a larger study that investigated how principals benefit from and shape professional capital to improve schools. Data were gathered from semi-structured interviews with district level leaders and principals. Findings demonstrated that there are things districts can do that positively influence principal retention, although these practices are not necessarily culturally responsive. Data supported the literature that professional development and mentoring, improved working conditions, and autonomy all positively influence principal retention. In addition, this study concluded that focusing on positive relationships and “growing your own” leadership are also key strategies to promote principal retention. Inorder to enact culturally responsive retention, recommendations include exploring whiteness in leadership and the influence of race on principal retention. Additionally. further investigation needs to be done examining the influence of higher accountability for student outcomes on principal retention. / Thesis (EdD) — Boston College, 2022. / Submitted to: Boston College. Lynch School of Education. / Discipline: Educational Leadership and Higher Education.
156

Controlling Silica Cluster Dispersion Through Thermoresponsive Binders

Bava, Luciana 01 August 2008 (has links)
No description available.
157

Modification of Behavior of Elastin-like Polypeptides by Changing Molecular Architecture

Ghoorchian, Ali 11 May 2012 (has links)
No description available.
158

Sensory Kinematics: Interactive Architecture and Its Influences on the Built Environment

Garcia, Ghislaine L. 19 September 2017 (has links)
No description available.
159

Hydroxypropyl Cellulose for Flavor Encapsulation

Heitfeld, Kevin A. January 2006 (has links)
No description available.
160

Smart Membranes: Hydroxypropyl Cellulose for Flavor Delivery

Heitfeld, Kevin A. 02 July 2007 (has links)
No description available.

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