Education Commons^™

Oral Microbial Burden Of Periodontal Pathogens Among Orthodontic Patients, David Jolley

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objectives

Many research studies involving orthodontic patients have a natural inclination to focus on changes in levels of cariogenic pathogens after bracket placement, and very few studies examine the role of changes of periodontal pathogens – particularly among adult patients. Interestingly, recent evidence suggests that increased levels of a specific periodontal pathogen, Fusobacterium nucleatum, may elevate risk for development of colon cancer in adults through direct pathways. Based upon this new evidence, the objective of the current study was to screen saliva samples taken from orthodontic patients to determine the prevalence of periodontal pathogens, including F. Nucleatum, T. denticola, and …

Process Development For The Fabrication Of Semiconductor Devices And Circuits Using Spin-On Dopant, Richard R. Ryan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Traditional approaches to semiconductor device fabrication are expensive and time consuming, making them out of reach for most universities and colleges. The objective of this thesis is to develop a process by which semiconductor devices and circuits can be implemented completely in-house using spin-on dopants (SODs), and low-cost transparency masks, to significantly reduce the lead time, complexity, and cost associated with device fabrication. This will allow hands on fabrication experience for students at universities and colleges without the traditional expensive device fabrication facilities. In addition, it will also allow students and professors to design, fabricate and test semiconductor devices and …

Structural Behavior Of Nbsexte2-X Superconductors Under High Pressure, Vahe Mkrtchyan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Niobium chalcogenide compounds have recently gained a great deal of interest due to the fact that a superconducting phase coexists with the charge density wave state (CDW), as well as their potential for numerous applications. Two superconducting compositions, NbSexTe2-x (x=2, 1.5) were prepared by solid state route using high purity Nb, Se, and Te powders. Powder X-ray diffraction patterns collected at ambient conditions for NbSe2 and NbSe1.5Te0.5 showed a single phase with hexagonal crystal structure, with space group P63mmc. High-pressure X-ray diffraction measurements were performed at the Advanced Photon Source at Argonne National Laboratory to investigate structural stability up to …

Development And Testing Of An Assessment To Measure Spatial Thinking About Enhanced Greenhouse Effect, Heather Jean Skaza

UNLV Theses, Dissertations, Professional Papers, and Capstones

Americans, in general, do not behave in environmentally sustainable ways. We drive cars and fly in planes that emit planet-warming carbon. We purchase food in nearly indestructible packaging that is not recycled or repurposed. We do not consider the environmental impact of the “stuff” stuffed into our grocery and department stores, most of which is made of materials that had to be dug out of the ground, leaving rivers and skies full of pollution in its place. Citizens have a responsibility to understand complex global and local environmental problems. A person’s ability to think about the way that an environmental …

A Case Study: Students' Mathematics-Related Beliefs From Integrated Stem Model-Eliciting Activities, Cathrine Maiorca

UNLV Theses, Dissertations, Professional Papers, and Capstones

This case study examines the mathematics-related beliefs of fourth and fifth grade students who participated in an after-school integrated science, technology, engineering and mathematics (STEM) program where participants completed four Model-Eliciting Activities. The research questions addressed by this study are, What is the nature of the change in mathematics-related beliefs of students who participate in an after-school MEA program? In particular, what is the difference, if any, of the nature of the change in beliefs across varying ability levels? The framework used to describe these beliefs was developed by Kloosterman and includes beliefs about the nature of mathematics and mathematics …

Eight Steps To Weight Loss: Development Of An Evidence-Based Collaborative Provider-Patient Workbook For Overweight Or Obese Adults, Katherine Ann Wagner

UNLV Theses, Dissertations, Professional Papers, and Capstones

Despite decades of effort on the part of health care providers and policy makers to reduce the prevalence of obesity, the prevalence of obesity in the United States remains high (CDC, 2015). In the adult population ages 20 years of age and older, 35.7% are considered obese. The annual medical costs for people who are obese are $1,429 higher than people of a healthy weight (CDC, 2013). Obesity increases the risk for chronic health conditions such as hypertension, type 2 diabetes, hypercholesterolemia, coronary heart disease, stroke, asthma, arthritis, and cancer (Hammond & Levine, 2010). Over-weight and obesity are the main …

The Experience Of Teaching Online Secondary Science, Cynthia Ann Clark

UNLV Theses, Dissertations, Professional Papers, and Capstones

The experience of teaching online secondary science was investigated through the lens of developmental phenomenography. Recorded phenomenographic interviews were conducted with thirteen secondary science teachers who were teaching online in two countries and four states. After analyzing the transcripts individually and as a whole, seven themes were identified: (1) Virtual Labs and Learning, (2) Student Learning and Factors Involved, (3) Communication and Instruction, (4) Teaching as Collaboration/Social Aspect, (5) Teaching and Learning as Assessment, (6) Curriculum Effects on Teaching and Learning, and (7) Online Structure Effects on Teaching and Learning. The structures of awareness of these seven themes formed the …