Digital Commons Network^™

The Effect Of Relative Electrode Size On The Performance Of A Supercapacitive Microbial Fuel Cell Design, Jeremiah Houghton

Nanoscience and Microsystems ETDs

Supercapacitive microbial fuel cells with various anode and cathode dimensions were investigated in order to determine the effect on capacitance and delivered power quality. The cathode size was determined to be the limiting component of the system, while anode size showed little effect on the devices performance. By doubling the cathode area, peak power output was improved by roughly 120% for a 10 ms pulse discharge. Doubling the cathode area also had a positive effect on the internal resistance of the cell, lowering the equivalent series resistance by approximately 47%. Doubling the anode area increased peak power output slightly, with …

2015 Annual Report, Joseph A. Cook

Annual Reports

No abstract provided.

Decision-Making In A Coaching Environment: How A Coach Makes Decisions When Coaching A Mathematics Teacher On Student/Teacher Discourse, Laura Burr

Teacher Education, Educational Leadership & Policy ETDs

The purpose of this study was to determine how a mathematics coach made decisions when coaching a middle school mathematics teacher on using classroom discourse in a reform mathematics classroom. This was a researcher participant qualitative study using design experiment methodology in which the coaching process was studied in an environment that is typical of an educational coaching setting. The teacher and coach/researcher made conjectures on what was happening in the classroom based on observations; the conjectures provided the basis for the development of the interventions. The teacher modified her pedagogy using the interventions; the results of the pedagogical changes …

"It Was A Whole New Environment": Transformative Organizational Culture And The Development Of Science Identity For Underrepresented Students In Science, Technology, Engineering And Math (Stem), Rebecca Ann Beals

Sociology ETDs

Traditional models of student success in higher education focus on access and retention of students, and fall short in their ability to explain the nuanced dynamics of identity formation that occurs for underrepresented STEM students. Drawing on Multicontextual Theory, I examine how academic environments offer non-traditional ways of developing an integrated science identity' in underrepresented STEM students and offer benefits to these students in terms of attraction to STEM, socialization and persistence. The intersectional, mixed-method data for this dissertation include in-depth interviews, focus groups, and student survey responses from various STEM contexts across multiple institutions in the Southwest. I discuss …

Klf4 Deletion Alters Gastric Cell Lineage And Induces Muc2 Expression, Tianxin Yu, Xi Chen, T. Lin, J. Liu, M. Li, W. Zhang, X. Xu, W. Zhao, M. Liu, Dana L. Napier, Chi Wang, B. Mark Evers, Chunming Liu

Markey Cancer Center Faculty Publications

Gastric cancer is one of the most common types of cancer in the world, particularly in underdeveloped countries. The mechanism of gastric cancer is less understood compared with other types of gastrointestinal (GI) cancers. Krüppel-like factor 4 (KLF4) is a zinc-finger transcription factor and is a potential tumor suppressor in GI cancers. In this study, we have generated two mouse models, Rosa-Cre;Klf4^fl/fl and Lgr5-Cre;Klf4^fl/fl. KLF4 was deleted by Rosa-Cre in the gastric epithelia cells or by Lgr5-Cre in the antral stem cells in the adult mice. KLF4 deletion resulted in increased proliferating cells and decreased pit mucous …

The Investigation And Optimization Of A Two-Heat-Pump System Incorporating Thermal Storage For Shaping Residential Heating Load, Emily Lord Barrett

Dissertations and Theses

Portland General Electric has proposed coupling one or more water tanks with two heat pumps in order to perform load-shifting in residential customer heating and cooling applications. By using the water tanks as a thermal storage unit, this project attempts to partially decouple energy consumption from generation to provide peak demand reduction and to better facilitate the integration of variable renewable energy resources. A scoping study was performed to evaluate the potential impact of this project if implemented in single family homes in Portland, Oregon. This study revealed that the system could provide meaningful savings in the cost of electricity …

Connecting To Nature, Community, And Self: A Conservation Corps Approach To Re-Engaging At-Risk Youth In Science Education, Sara Jo Linden

Dissertations and Theses

The social and environmental challenges of the coming decades will require that individuals possess environmental literacy: the understanding of natural systems combined with a sense of care for the earth, and the confidence and competency to act on its behalf. At the same time, disengaged youth need education environments that foster belonging and promote affective outcomes. The youth conservation corps model provides a natural context for engaging academically at-risk youth in environmental science education, while fostering connection to nature and student self-efficacy in ways that are experiential, relevant, and relationship-based. The focus of this study was a conservation corps program …

Enhancing Student Usability Of 3d Bioprinting, Andrew Chang, Sabrina Cismas

Interdisciplinary Design Senior Theses

3D bioprinting is an emerging technology that is changing the face of tissue engineering through the ability to print cells, scaffolding and matrix materials, and other bioactive reagents. 3D bioprinters are a culmination of various scientific and engineering disciplines with respect to their operation and bioprints, and as such, offer a prime case study on the convergence of the technical fields in research. In order to capitalize on this fact and make 3D bioprinting more accessible for interdisciplinary education applications, we sought to translate 3D bioprinting into the classroom environment as a tool for education. In collaboration with SE3D Education, …

Intracranial Pressure Sensor, Matthew Murray, Jared Shimada

Bioengineering Senior Theses

Idiopathic Intracranial Hypertension (IIH) also known as Pseudotumor Cerebri is a condition resulting from an increase of Cerebrospinal Fluid (CSF), a fluid that helps to protect the brain and spinal cord, in the cranial cavity. Currently the only treatment method for this health condition is the draining of the fluid via implanted intracranial shunts that get clogged in approximately 50% of patients. Clogged shunts can only be detected when IIH symptoms begin to reappear. We propose to create an ultrasound-read intracranial pressure sensor used to supplement shunts implanted in patients who suffer from Idiopathic Intracranial Hypertension. This will provide immediate …

Semaphorin3a Increases Focal Adhesion Formation To Shift The Relationship Between Cell Migration And Substratum Concentration Through A Rock-Dependent Mechanism, Frances V. Compere, Scott Gehler

Celebration of Learning

Cell migration is essential for many life processes, including wound healing, embryonic development and cancer metastasis. Cells move across a surface by interacting and forming adhesions with the molecules in their environment, specifically the extracellular matrix. Past studies have shown that there is an optimal level of cell-substratum adhesive strength that allows for the most cell migration and spreading (DiMilla et al., 1993; Gaudet et al., 2003). The mechanism by which this works is not well understood, however. Semaphorin 3A (Sema3A) has been shown to increase the expression of integrin receptors, which help mediate the formation of the adhesions between …

Full Issue 2(3)

International Journal of Speleology

No abstract provided.

Aesthetic, Spiritual, And Flow Experiences: Contrasts And Educational Implications, P. Bruce Uhrmacher, Christy Moroye, Bradley Conrad

Education and Culture

The purpose of this paper is to cross-examine Dewey’s ideas on religious and aesthetic experiences, and Csikszentmihalyi’s theory of flow experience. To achieve this end, we offer an analytic framework for evaluating experiences: triggers, characterizations, and import. In using this framework, we not only more deeply examine these ideas of experience, but we also discuss what educators may learn from the intersection of these three important theories of experience.

Dewey Anticipates Habermas’S Paradigm Of Communication: The Critique Of Individualism And The Basis For Moral Authority In Democratic Education, Brian W. Dotts

Education and Culture

This article presents a novel account of a key concept in John Dewey’s reconstructionist theory specifically related to the nucleus underlying his idea of democracy: intersubjective communication, what Dewey called the “democratic criterion.” Many theorists relate democracy to a form of rule. Consequently, discussions of democracy tend to be limited to functionalist theories. Dewey’s idea of democracy establishes an important distinction from conventional theories by developing its radical, critical, evolutionary, and intersubjective potential. I argue that Dewey anticipated Jürgen Habermas’s Paradigm of Communication in his reconstructionist social theory with potential to de-reify institutions and to empower human beings democratically.

Cultivating Civic Habits: A Deweyan Analysis Of The National Council For The Social Studies Position Statement On Guidelines For Social Studies Teaching And Learning, Lance E. Mason

Education and Culture

The National Council for the Social Studies (NCSS) position statement on Curriculum Guidelines for Social Studies Teaching and Learning provides a conceptual outline for contemporary social studies curriculum, calling for social studies learning that is meaningful, integrated, value-based, challenging, and active. This is largely consistent with a Deweyan approach to social studies, though the statement’s lack of theoretical grounding makes it vulnerable to misappropriation. By filtering the statement’s framework through Dewey’s pragmatism, such vulnerabilities can be articulated, while offering a deeper exploration of both the possibilities and challenges for implementation.

Responsible Gambling Training: How Do We Know What’S Working?, Janine Robinson

International Conference on Gambling & Risk Taking

No abstract provided.

Weather Modification: A Modest Proposal, Lawrence A. Weirs

Georgia Journal of International & Comparative Law

No abstract provided.

Application Of The Law Of War To Internal Conflicts, James E. Bond

Georgia Journal of International & Comparative Law

No abstract provided.

Complexity Analysis: A Preliminary Step Toward A General Systems Theory Of International Law, James L. Hildebrand

Georgia Journal of International & Comparative Law

No abstract provided.

Proceedings Of The 1st Annual Higher Education Flipped Learning Conference, Jerry Overmyer - Editor, Nissa Yestness - Editor

Higher Education Flipped Learning Conference

Click the title or the Download button to view/download the proceedings as a PDF.

The Effects Of Two Levels Of Salinity On Wisconsin Fast Plants, Megan M. Janssen, Emily Geison, Tiffany Bertoni, Matthew Zimmerman

Celebration of Learning

Wisconsin Fast Plant (Brassica rapa, Brassicaceae) seeds were planted in three, six-celled planting containers filled with potting soil and put beneath a continuous grow-lux light. One week after sprouting, one container (E1) was put into a separate tray filled with 0.5% NaCl solution, another container (E2) was put into a separate tray filled with 1.0% NaCl solution, and the third container was left in regular tap water. At seven-day intervals thereafter, the height of all plants was recorded, and the numbers of leaves and flowers were recorded. By week four of recording data, the average height (mm) of the control …

Iron Addiction In Tumor Initiating Cells: A Novel Therapeutic Target In Ovarian Cancer, Debargha Basuli

Doctoral Dissertations

Ovarian cancer is a highly lethal malignancy that has not seen a major therapeutic advance in over 30 years. We demonstrate that ovarian cancer exhibits a targetable alteration in iron metabolism. Ferroportin (FPN), an iron efflux pump, is decreased and transferrin receptor (TFRC), an iron importer, is increased in ovarian cancer tissue. Expression of FPN and TFRC are strongly associated with patient survival. Ovarian cancer tumor-initiating cells demonstrate a similar profile of iron excess. Iron deprivation induced by desferroxamine, knockout of IRP2, or overexpression of FPN preferentially blocks growth of tumor initiating cells. Iron restriction inhibits invasion, synthesis of MMPs …

Survival And Cause-Specific Mortality Of Female Eastern Wild Turkeys In Two Frequently-Burned Longleaf Pine Savannas, Andrew R. Little, John F. Benson, Michael J. Chamberlain, L. Mike Conner, Robert J. Warren

School of Natural Resources: Faculty Publications

Longleaf pine savannas have declined throughout the southeastern United States due to land-use change. Fortunately, natural resource professionals are currently restoring these ecologically and economically important savannas. Although efforts are underway to restore longleaf pine savannas, little information exists on female eastern wild turkey Meleagris gallopavo silvestris population dynamics in these systems. Therefore, we evaluated survival and cause-specific mortality of female eastern wild turkeys in two longleaf pine savannas in southwestern Georgia. We radio-marked 126 female wild turkeys during 2010–2013 and monitored their survival; 66 (52.4%) radio-marked females died during the study. We estimated causes of death for 37 mortality …

Jellison Quoted On History Of Ugly Bridesmaids Dresses, Ohio University College Of Arts & Sciences

All Forum Articles

No abstract provided.

Resuehr, Tolwani Recognized For Excellence In Teaching, Uab Heersink School Of Medicine News

Browse All News

No abstract provided.

How Did We Wind Up In Such An Unlikely Universe?, Michael Bass

UCF Forum

Not long ago the Public Broadcasting Service program NOVA presented an episode called “The Great Math Mystery.” It dealt with the many ways mathematical relationships and special numbers crop up when investigating the physical and natural world.

The Ferrojan Horse Hypothesis: Iron-Virus Interactions In The Ocean, Chelsea Bonnain, Mya Breitbart, Kristen N. Buck

Marine Science Faculty Publications

Iron is an essential nutrient and the sub-nanomolar concentrations of iron in open ocean surface waters are often insufficient to support optimal biological activity. More than 99.9% of dissolved iron in these waters is bound to organic ligands, yet determining the identity of these ligands in seawater remains a major challenge. Among the potential dissolved organic ligands in the colloidal fraction captured between a 0.02 and a 0.2 μm filter persists an extremely abundant biological candidate: viruses, most of which are phages (viruses that infect bacteria). Recent work in non-marine model systems has revealed the presence of iron ions within …

Rotamer-Restricted Fluorogenicity Of The Bis-Arsenical Reash, A. S. Walker, Paul R. Rablen, A. Schepartz

Chemistry & Biochemistry Faculty Works

Fluorogenic dyes such as FlAsH and ReAsH are used widely to localize, monitor, and characterize proteins and their assemblies in live cells. These bis-arsenical dyes can become fluorescent when bound to a protein containing four proximal Cys thiols—a tetracysteine (Cys4) motif. Yet the mechanism by which bis-arsenicals become fluorescent upon binding a Cys4 motif is unknown, and this nescience limits more widespread application of this tool. Here we probe the origins of ReAsH fluorogenicity using both computation and experiment. Our results support a model in which ReAsH fluorescence depends on the relative orientation of the aryl chromophore and the appended …

Solar-Powered Water Purification System With Energy Storage, M. Sophie Hall

2016

At a time when potable water, fossil fuels, and wood fuels are increasingly scarce, it is more

important than ever to develop methods of purifying water with renewable energy resources.

This report compares the benefits and drawbacks of various models of solar powered water

pasteurizers and solar powered stills. A flow diagram is proposed for a solar powered distillation

system which utilizes phase change material energy storage to extend its productive time.

Spatial Heterogeneity Analysis In Evaluation Of Cell Viability And Apoptosis For Colorectal Cancer Cells, Aydin Saribudak, Herman Kucharavy, Karen Hubbard, Muharrem Umit Uyar

Publications and Research

In evaluation of cell viability and apoptosis, spatial heterogeneity is quantified for cancerous cells cultured in 3-D in vitro cell-based assays under the impact of anti-cancer agents. In 48-h experiments using human colorectal cancer cell lines of HCT-116, SW-620, and SW-480, incubated cells are divided into control and drug administered groups, to be grown in matrigel and FOLFOX solution, respectively. Our 3-D cell tracking and data acquisition system guiding an inverted microscope with a digital camera is utilized to capture bright field and fluorescent images of colorectal cancer cells at multiple time points. Identifying the locations of live and dead …

Identification, Characterization, And Life Cycle Of Intein-Associated Homing Endonucleases, Joshua J. Skydel

Honors Scholar Theses

Inteins are molecular parasites that have been identified in unicellular organisms from the three domains of life. The intein self-excises following translation of the host gene, and therefore incurs a fitness cost for its carrier. The symbiotic state of the intein to its host is dependent on the presence or absence of a homing endonuclease domain, which facilitates horizontal transfer of the molecule. Identification of this domain provides information on the evolutionary history of the intein, as well as patterns of horizontal gene transfer in microbial communities. I have therefore developed Hidden Markov Models (HMMs) to identify homing endonuclease domains …