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Modeling Passive Solar Distillation Production In Las Vegas, Nevada, Noe I. Santos

UNLV Theses, Dissertations, Professional Papers, and Capstones

A study has been performed to examine the effects of daily weather on the performance of commercial solar distillation basins (solar stills). The objectives of this study were to evaluate the long term performance of solar stills, to instrument two solar stills and record sub-hourly thermal properties, to evaluate existing heat transfer modeling methods for hourly production, and to create new models to predict daily production using experimental distillate production and local weather data by utilizing artificial neural networks, genetic algorithms, and multivariate regression. A system dynamics model was also created to determine the required basin area and storage volume …

Building An Mft Outpatient Practice Through Contract Procurement: A Case Study, Anthony T. Alonzo

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract Not Included]

Personalized Searching For Web Service Using User Interests, Rong Hu, Wanchun Dou, Xiaoqing Frank Liu, Jianxun Liu

Computer Science Faculty Research & Creative Works

Users usually have different prospective even they input a same keyword to search Web services. It is a challenge to personalize web service search engine as more and more keyword-like Web services becoming available on Internet. User interest plays an important role in personalizing search result. Therefore, through interest extraction, Web service search engine is personalized. at last, an experiment is presented to demonstrate the feasibility of the method. © 2011 IEEE.

Information Flow Security In Cyber-Physical Systems, Thoshitha Gamage, Ravi Akella, Thomas Roth, Bruce Mcmillin

Computer Science Faculty Research & Creative Works

Preserving the confidentiality of sensitive internal actions is a unique challenge in Cyber-Physical Systems (CPSs) due to the inherent external observability of such systems and the tight coupling between their cyber and physical domains. the far-reaching objective of this work is to develop a science of self-obfuscating systems based on the composition of simple building blocks. a model of Nondeducibility composes the building blocks under information flow security properties. to this end, this paper proposes fundamental theories on external observability for basic regular networks and the concept of "event compensation". Copyright © 2011 ACM.

Stochastic Policy Search For Variance-Penalized Semi-Markov Control, Abhijit Gosavi, Mandar Purohit

Engineering Management and Systems Engineering Faculty Research & Creative Works

The variance-penalized metric in Markov decision processes (MDPs) seeks to maximize the average reward minus a scalar time the variance of rewards. in this paper, our goal is to study the same metric in the context of the semi-Markov decision process (SMDP). in the SMDP, unlike the MDP, the time spent in each transition is not identical and may in fact be a random variable. We first develop an expression for the variance of rewards in the SMDPs, and then formulate the VP-SMDP. Our interest here is in solving the problem without generating the underlying transition probabilities of the Markov …

Executable System Architecting Using Systems Modeling Language In Conjunction With Colored Petri Nets In A Model-Driven Systems Development Process, Renzhong Wang, Cihan H. Dagli

Engineering Management and Systems Engineering Faculty Research & Creative Works

This work proposes an executable system architecting paradigm for discrete-event system modeling and analysis through integration of a set of modeling tools, executable formalisms, analytical tools, and animation tools. the essential step is converting SysML-Based specifications into colored Petri nets through a conversion scheme proposed here. Such a paradigm permits rigorous static and dynamic system analysis, as well as formal verification of the behavior and functionality of the SysML-Based design. This paper also compares the capabilities of the proposed executable system architecting paradigm with other executable formalisms. Further, it discusses the basic principles of executable architecture specification and analysis for …

Work In Progress - Virtual Facilitation And Procedural Knowledge Education, Ray Luechtefeld, Steve Eugene Watkins

Electrical and Computer Engineering Faculty Research & Creative Works

Engineering students acquire both conceptual and procedural knowledge as part of their education. While conceptual knowledge, such as understanding why certain design practices are required or having knowledge of the general principles of engineering development, is essential, procedural knowledge to enact specific engineering practices is also needed. This kind of knowledge, such as balancing chemical equations, solving calculus problems, or finding Thevenin-Norton equivalents, is usually taught through rote problem solving, sometimes with the guidance of teaching assistants or aid from the instructor if students find themselves "stuck". However, a Virtual Facilitator, designed to help students develop team skills, can also …

Comparison Of A Recurrent Neural Network Pv System Model With A Traditional Component-Based Pv System Model, Daniel M. Riley, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

Photovoltaic (PV) system modeling is used throughout the photovoltaic industry for the prediction of PV system output under a given set of weather conditions. PV system modeling has a wide range of uses including pre-purchase comparisons of PV system components, system health monitoring, and estimation of payback (return on investment) times. in order to adequately model a PV system, the system must be characterized to establish the relationship between given weather inputs (e.g., irradiance, spectrum, temperature) and desired system outputs (e.g., AC power, module temperature). Traditional approaches to system characterization involve characterizing and modeling each component in a PV system …

Optimized Built-In Self-Test Technique For Caen-Based Nanofabric Systems, Sambhav Kundaikar, Maciej Zawodniok

Electrical and Computer Engineering Faculty Research & Creative Works

We propose a built-in self-test (BIST) technique for testing and diagnosis of molecular electronic based nano fabrics. the nano fabric architectures are reconfigurable in nature thus making it possible to utilize general methods similar to those employed for testing of FPGAs. However, a high defect rate in nano fabrics renders the traditional techniques ill-suited. Moreover, the nano blocks offer potential for using a partially damaged nano block due to inherent redundancy of the architecture. This paper presents the design and analysis of testing configurations and optimization scheme that minimizes testing time while improving the utilization of the nano fabric. the …

2011 December, Office Of Communications & Marketing, Morehead State University.

Morehead State Press Release Archive, 1961 to the Present

Press releases for December of 2011.

Dynamic Partial Reconfiguration For Pipelined Digital Systems— A Case Study Using A Color Space Conversion Engine, Ryan Toukatly

Theses

In digital hardware design, reconfigurable devices such as Field Programmable Gate Arrays (FPGAs) allow for a unique feature called partial reconfiguration PR). This refers to the reprogramming of a subset of the reconfigurable logic during active operation. PR allows multiple hardware blocks to be consolidated into a single partition, which can be reprogrammed at run-time as desired. This may reduce the logic circuit (and silicon area) requirements and greatly extend functionality. Furthermore, dynamic partial reconfiguration (DPR) refers to PR that does not halt the system during reprogramming. This allows for configuration to overlap with normal processing, potentially achieving better system …

Probabilistic Framework For Image Understanding Applications Using Bayesian Networks, Mustafa Jaber

Theses

Machine learning algorithms have been successfully utilized in various systems/devices. They have the ability to improve the usability/quality of such systems in terms of intelligent user interface, fast performance, and more importantly, high accuracy. In this research, machine learning techniques are used in the field of image understanding, which is a common research area between image analysis and computer vision, to involve higher processing level of a target image to "make sense" of the scene captured in it. A general probabilistic framework for image understanding where topics associated with (i) collection of images to generate a comprehensive and valid database, …

Investigations Of The Tribological Effects Of Engine Oil Dilution By Vegetable And Animal Fat Feedstock Biodiesel On Selected Surfaces, Sultana Mahbuba Shanta

College of Graduate Studies: Theses & Dissertations

Biodiesels have become attractive alternative fuel to replace traditional fossil fuels. Biodiesels can be used in diesel engines with no major modification, but its use leads to some degree of engine oil dilution because of biodiesel leaking and scrapping to engine oil pan. Biodiesels can be made from vegetable and animal fat feedstocks. Therefore, the fatty acid methyl ester components of biodiesel may vary upon these sources of feedstock. In this thesis work, engine oil is diluted with vegetable (canola oil, peanut oil and soybean oil biodiesel) and animal (chicken fat) feedstock biodiesels at known percentages and these mixtures are …

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Kovesi And The Formal And Material Elements Of Concepts, T. Brian Mooney, Mark Nowacki, John N. Williams

Research Collection School of Social Sciences

In his seminal work Moral Notions, Julius Kovesi presents a novel account of concept formation. At the heart of this account is a distinction between what he terms the material element and the formal element of concepts. This paper elucidates his distinction in detail and contrasts it with other distinctions such as form-matter, universal-particular, genus-difference, necessary-sufficient, and open texture-closed texture. We situate Kovesi’s distinction within his general philosophical method, outlining his views on concept formation in general and explain how his theory of concept formation is applied in moral philosophy.

Going Beyond The Multicultural Experience-Creativity Link: The Mediating Role Of Emotions, Chi-Ying Cheng, Angela K. Y. Leung, Tsung-Yu Wu

Research Collection School of Social Sciences

This research examines the mediating role of emotions implicated in the multicultural experience—creativity link. We propose that when individuals are dealing with apparent cultural contradictions upon encountering two cultures simultaneously, mentally juxtaposing dissonant cultural stimuli could lower positive affect or increase negative affect, which could in turn induce a deeper level of cognitive processing of cultural discrepancies and inspire creativity. Two studies compared dual cultural exposure versus single cultural exposure among bicultural Singaporeans (Study 1) and compared self-relevant (jointly presenting local and foreign cultures) versus self-irrelevant (jointly presenting foreign cultures only) dual cultural exposure among monocultural Taiwanese (Study 2). As …

African American Male Students' Perceptions Of Factors That Contribute To Their Academic Success, Gertrude Rolland

College of Graduate Studies: Theses & Dissertations

This study sought to understand African American high school males' perceptions of factors contributing to academic success. The researcher gathered information by interviewing students and collecting their demographic profile data. This qualitative research method enabled the researcher to learn directly from students what factors African American male students associated with academic success as well as challenges to academic success and solutions for achieving academic success. Participants were three junior and three senior African American high school male students attending a rural high school in Georgia. Data collection occurred during the spring semester of 2011. Each participant was asked 16 questions …

Insect Abundance And Variability In An Urban-Rural Landscape And Comparison To Foraging Habitat Selection Of Bats, Nicole M. Oehler

All-Inclusive List of Electronic Theses and Dissertations

I conducted a study of the relationship between prey availability and foraging habitat selection of Indiana bats (Myotis sodalis), big brown bats (Eptesicus fuscus), eastern red bats (Lasiurus borealis) and evening bats (Nycticeius humeralis) in an urban-rural landscape matrix of southwestern Indianapolis. Insects were collected from nine different habitat types found within the range of these species. Insect data were collected from 2006 to 2008 using sticky traps placed in each habitat type. Habitat types were ranked by importance to each bat species (based on previous studies) and then compared to the average number of prey insects captured per habitat …

Capir: Collaborative Action Planning With Intention Recognition, Nguyen T., Hsu D., Lee W., Tze-Yun Leong, Kaelbling L., Lozano-Perez T., Grant A.

Research Collection School Of Computing and Information Systems

We apply decision theoretic techniques to construct nonplayer characters that are able to assist a human player in collaborative games. The method is based on solving Markov decision processes, which can be difficult when the game state is described by many variables. To scale to more complex games, the method allows decomposition of a game task into subtasks, each of which can be modelled by a Markov decision process. Intention recognition is used to infer the subtask that the human is currently performing, allowing the helper to assist the human in performing the correct task. Experiments show that the method …

Principals’ Perceptions Of Readiness For Their Evolving Roles In High-Stakes Environments, Angela Marie Huff

Dissertations

Principals are leading schools during an evolving time where preparation may not have prepared principals fully for the task of school leadership. The past decade has revealed an escalation in the disapproval of principal preparation programs and participants in these programs insist that these schools be held accountable (Levine, 2005). However, in revamping preparation programs, one must focus on student selection, curriculum and course content, pedagogical strategies, internships, and field experiences (Orr, 2006). Some have suggested that the job of principal may have become impossible for all but a few super leaders (Lashway, 2003). The requirements of the job may …

Investments In Leadership And Management Succession Planning At A Department Of Defense Organization In The Southeastern United States: A Review Of Strategic Implications, Richard Allen Jeffries

Dissertations

With the impending aging workforce retirement tidal wave, targeted investments are needed in leadership and management skills for new leader growth. Some organizations currently invest in leadership and management skill development. However, the impacts of the investments remain unknown in the organizations. A Department of Defense Organization in the Southeast United States (DODSE) serves as a scientific knowledge generating organization that supports the Department of Defense. At the DODSE, investments in leadership and management skills training began in 2007 with little understanding of how an increased investment in leadership and management training would be utilized within the organization. To create …

A Historical Perspective Of Testing And Assessment Including The Impact Of Summative And Formative Assessment On Student Achievement, Carole Sanger Brink

Dissertations

In 2007, Georgia developed a comprehensive framework to define what students need to know. One component of this framework emphasizes the use of both formative and summative assessments as part of an integral and specific component of the teachers' performance evaluation. Georgia administers the Criterion-Referenced Competency Test (CRCT) to every elementary student in Grades 1 though 8. Before 2008, the state tested eighth-grade students on a quality core curriculum. In 2008, the state began testing students on a Georgia Performance Standard curriculum. A direct comparison of the curriculum change should have contained items to test both curriculums. However, this was …

A Critical Analysis Of Job-Embedded Professional Learning Within A Distributed Leadership Framework, Ashley Jimerson Campoli

Dissertations

Leadership style and professional learning have been linked to student achievement. Studies have linked leadership styles such as distributed leadership to job-embedded professional learning. However, research is mixed when these two constructs are related to student achievement.

This study evaluated the relationship between distributed leadership and jobembedded professional learning. This study also evaluated relationships among jobembedded professional learning, distributed leadership, and third-grade achievement scores.

The study involved third grade mathematics teachers and school administrators in 46 elementary schools in the state of Georgia. Pearson’s bivariate correlation test was used to explore the relationship between job-embedded professional learning and distributed leadership. …

At Issue: Einstein Fellowship, Terrie Rust

Journal of STEM Teacher Education

No abstract provided.

Application Of Threshold Concepts To Improve A Design-Focused Course In Transportation Engineering, Dan Cernusca, Ghulam Bham

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Design is an integral part of engineering courses. to address its associated problems, however, is a challenging task in instruction because of design's open-endedness and complexity. in this study, two theoretical models were implemented in an introductory transportation engineering course to address the challenges associated with design of a highway. First, the theoretical framework proposed by the threshold concepts model was used to identify a candidate concept for the instructional redesign process. Two major characteristics of threshold concepts, integrativity and transformativity, were used to identify horizontal alignment as a candidate concept for the highway design process. Second, concept mapping was …

Measuring Global Response Of A Wind Turbine To Simulated Earthquake Shaking Assisted By Point Tracking Videogrammetry, Ian Prowell, Tim Schmidt, Ahmed Elgamal, Chia Ming Uang, Hal Romanowitz, J. Edward Duggan

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Experiments investigating earthquake response of structures traditionally use conventional wired instruments such as strain gauges, displacement transducers, and accelerometers deployed at key areas of interest throughout structure. for wind turbines the rotor is one of these key areas, but due to rotation it is not possible to use wired instruments without a special slip ring. in a recent experiment conducted using the Network for Earthquake Engineering Simulation (NEES) Large High Performance Shake Table (LHPOST) at the University of California, San Diego (UCSD) the global response of a full scale 65-kW turbine (22 m hub height) was monitored using a novel …

Intertwined Cultural Journeys: An Autoethnography Of Learning, Teaching, And Affirming Diversity Through Multicultural Music, Kathryn Blackmon

College of Graduate Studies: Theses & Dissertations

As our schools gain more and more children from different cultures and ethnicities, there is an increasing need to diversify curriculum to assist in cultivating tolerance and understanding. Drawing upon an eclectic group of theorists who highlight the importance of meaningful curricula and education, and using autoethnography as method, I explore aspects of reflective teaching and student empowerment through the medium of multicultural music education. Connections between my own cultural heritage and the cultures of my students were made through a critical evaluation of my current approach to multicultural music education. Using multiple information sources including student observations, lesson plans, …

A Psychoanalytic Inquiry Into Social Aggression As A Form Of Bullying Among Female Students, Tina Martin Debevec

College of Graduate Studies: Theses & Dissertations

Bullying among children and adolescents, particularly within the school setting, has drawn much attention in recent years as a reaction to an onslaught of high profile school violence in the 1990s. While much attention and research focused upon physical violence that was prevalent among male students, very little research covered indirect, relational, and social forms of aggression. Research into the covert manners of aggression that involved the manipulation of relationships revealed them to be salient among female students, demonstrating that female students were predominantly aggressive in a different manner than their male counterparts. Psychoanalytic theories of attachment and aggression guide …

The Effects Of Simulation On Junior Level Baccalaureate Nursing Students' Self-Efficacy And Intrinsic Motivation, Michelle E. Dykes

College of Graduate Studies: Theses & Dissertations

Nursing education is experiencing a generational phenomenon with student enrollment spanning three generations. Classrooms cultures are changing today and include some Baby Boomers and large numbers of Generation X, Generation Y, and second-degree seeking students. These culturally diverse groups of students have unique sets of learning characteristics. Given the current challenges of growing student diversity, balancing budgets, and meeting faculty shortages, nursing schools are pressed to find alternative teaching methods that are not only cost and labor saving but also effective and equitable for the diverse student groups. This quantitative, experimental research design study explored the effects of the alternative …

Reaping What You Sow: Southern Cultures, Black Traditions, And Black Women, Cynthia Mikell

College of Graduate Studies: Theses & Dissertations

This is an inquiry into Southern cultures, Black traditions, and Black women with a focus on the life of one Black woman educator. Drawing upon the works of Nobel Prize and Pulitzer Prize-winning African American woman, novelist, and master storyteller, Toni Morrison (1970, 1973, 1976, 1987, 1988, 1993, 2003, & 2008); activist and Black feminist protest thinker and writer, bell hooks (1981, 1984, 1995, & 2000); the Pulitzer Prize-winning novelist, activist, and womanist, Alice Walker (1983); the Black feminist thinker and writer, Patricia Hills Collins (1998, 2000), and the critical race theorist and the first tenured African-American professor of Law …