Digital Commons Network^™

Study On Neural Conduction As In Myelinated Structure Under Pathological Conditions, George J. Morales

Electronic Theses and Dissertations 2010 - 2019

A method for modeling and simulating neural action potential (AP) propagation along the length of an axon containing a number of Ranvier nodes is proposed in this dissertation. A system identification approach is adopted to represent node of Ranvier (NR) response to current pulse stimulus in the form of transfer function representations for NR excitability. Segments of myelinated internodal (IN) and NR regions are cascaded, representing the remaining downstream axon after a site-of-stimulus introduction of an external current pulse. This cascading network is used to simulate "cable" properties and signal propagation along the length of the axon. This work proposes …

Synchronization Of Coupled Semiconductor Lasers, Michael S. London

Electronic Theses and Dissertations 2010 - 2019

The synchronization of coupled semiconductor lasers with delay is investigated by numerical simulations of the nonlinear dynamic models complemented by a stability analysis of the linearized system. The equations used in the dissertation are based on the well known "Lang-Kobayashi" model modified to include unidirectional and bidirectional coupling. Stability diagrams are calculated and supplemented by numerically integrated time series. Synchronization is determined and quantified by computing the cross-correlation function. It is found that synchronized states are achievable for a wide range of coupling constants and delay times. These findings have implications for experiment and technological applications, notably in cryptography.

System Identification Methodology For A Wave Adaptive Modular Unmanned Surface Vehicle, Janine L. Mask

Electronic Theses and Dissertations 2010 - 2019

The design, implementation, and testing of an experimental setup intended to evaluate the dynamic maneuvering performance of the Wave Adaptive Modular Vessel (WAM-V) class USV12, a 3.7 meter unmanned surface vehicle (USV) is described. A comprehensive sensor package was designed, fabricated and assembled to record the vehicle's dynamic response to various control inputs. All subsystems were fabricated and installed on a test vehicle, GUSS, and full system, open-loop maneuvering tests were conducted to show validity of data collection technique. Simulations were performed using model parameters found in the literature to create a "simulated experimental" data set, upon which system identification …

Systematic Evaluation Of Object Detection And Recognition Approaches With Context Capabilities, Urbina Rafael J Giusti

Electronic Theses and Dissertations 2010 - 2019

Contemporary computer vision solutions to the problem of object detection aim at incorporating contextual information into the process. This thesis proposes a systematic evaluation of the usefulness of incorporating knowledge about the geometric context of a scene into a baseline object detection algorithm based on local features. This research extends publicly available MATLABRª implementations of leading algorithms in the field and integrates them in a coherent and extensible way. Experiments are presented to compare the performance and accuracy between baseline and context-based detectors, using images from the recently published SUN09 dataset. Experimental results demonstrate that adding contextual information about the …

Technology And Fifth Grade Teaching, Debbie. Beaudry

Electronic Theses and Dissertations 2010 - 2019

This mixed methods study investigated 5th-grade teachers' reported use of computer technology and variables that have been identified by researchers as affecting teachers' use of technology, including professional development activities, physical access to computer technology, and technical and instructional support provided for teachers. Quantitative data were collected from 80 5th-grade teachers from a Florida public school district through an online survey in which teachers reported how frequently they used and had their students use computer technology for 27 different purposes. The teachers also reported the amount of emphasis those 27 different topics received during their technology-related professional development experiences, the …

The Minimal Logarithmic Signature Conjecture, Nidhi. Singhi

Electronic Theses and Dissertations 2010 - 2019

The minimal logarithmic signature conjecture states that in any finite simple group there are subsets Ai, 1 i s such that the size jAij of each Ai is a prime or 4 and each element of the group has a unique expression as a product Qs i=1 ai of elements ai 2 Ai. Logarithmic signatures have been used in the construction of several cryptographic primitives since the late 1970's [3, 15, 17, 19, 16]. The conjecture is shown to be true for various families of simple groups including cyclic groups, An, PSLn(q) when gcd(n; q 1) is 1, 4 or …

Theoretical Study Of Binary Alloy Thin Film Growth, Mark R. Bouwens

Electronic Theses and Dissertations 2010 - 2019

Computer simulations of the growth of binary alloy thin films in two and three dimensions were performed using an extension of the Solid on Solid model. Snapshots for a range of interactions and diffusion rates are presented and critically compared to experiment. A wide variety of distinct phases is identified and their growth conditions analyzed. These findings are summarized in a phase diagram. In addition, a fractal analysis of the domains is performed. It is found that for negative interactions the islands are two-dimensional, while for positive interactions, regardless of diffusion rate, a fractal dimension of 1.78 is obtained.

Understanding Group Emotional Intelligence In The Public Sector, Umar. Ghuman

Electronic Theses and Dissertations 2010 - 2019

In recent years behaviroal management literature has created and utilized the concept of group emotional intelligence in work groups and work teams. This dissertation is a re-conceptualization and an empirical analysis of group emotional intelligence in the context of public administration work groups. This dissertation proposes a new conceptualization of GEI and utilizes it for the empirical measurement of GEI. By critically reviewing previous theoretical and empirical literature on group level phenomena and their measurement, this dissertation offers a re-conceptualization of group emotional intelligence. it also defines group emotional intelligence (GEI), creates a model for GEI, provides an empirical means …

University Educational Leadership Technology Course Syllabi Alignment With State And National Technology Standards, Angela M. Iudica

Electronic Theses and Dissertations 2010 - 2019

The purpose of this study was to determine the degree of alignment to national and state standards in public and private university educational leadership certification programs in the state of Florida. The standards used were the National Educational Technology Standards for Administrators (NETS-A) and the Florida Principal Leadership Standard for Technology (FPLST). A total of 16 university technology leadership course syllabi were examined. Nine syllabi were obtained from 11 public universities and seven were obtained from 11 private universities in Florida. Syllabi were examined using rubrics and assigned to one of three categories: definitely aligned, somewhat aligned and not aligned. …

Very High Frequency Mimo Underwater Acoustic Communications In Ports And Shallow Waters, Gaultier. Real

Electronic Theses and Dissertations 2010 - 2019

This thesis presents the development of a Multiple-Input Multiple-Output (MIMO) capable high bit rate acoustic modem operating at high frequencies. A MIMO channel estimation technique based on Least-Squares (LS) estimation is developed here. Channel deconvolution is completed using a Minimum Mean-Square Error (MMSE) Linear Equalizer (LE). An Interference Cancellation Linear Equalizer (ICLE) is used to provide the theoretical limit of the MIMO deconvolution process. The RMSE of the channel estimation process was 1.83 % and 6.1810 %, respectively for simulated and experimental data. Using experimental data, the RMSE before MIMO deconvolution process was 141.3 % and dropped down to 60.224 …

Web-Based Automated Classification System For Nursing Language Based On Nursing Theory, Subhomoy D. Dass

Electronic Theses and Dissertations 2010 - 2019

Health care systems consist of various individuals and organizations that aim to meet the health care needs of people and provide a complete and responsive health care solution. One of the important aspects of a health care delivery system is nursing. The use of technology is a vital aspect for delivering an optimum and complete nursing care to individuals; and also for improving the quality and delivery mechanism of nursing care. The model proposed in this thesis for Nursing Knowledge Management System is a novel knowledge-based decision support system for nurses to capture and manage nursing practice, and further, to …

Development Of An Ultra-Lightweight Buckling-Restrained Brace Using Analytical And Numerical Methods, John Andrew Tinker

Dissertations and Theses

An ultra-lightweight buckling-restrained brace (ULWBRB) is developed using a highly ductile aluminum core and FRP restrainer. Utilization of lightweight materials results in a BRB that is 25% the weight of traditional mortar-filled tube varieties allowing easy installation in small to medium sized buildings requiring seismic retrofit without the need for heavy equipment. Construction utilizes commonly stocked materials able to be customized for required strength, drift, and geometry limitations. Analytical single degree of freedom (SDOF) and Euler buckling models are compared with published equations to determine the required restrainer stiffness (RRS). SDOF models yield RRS values 200% higher than the Euler …

The Role Of Feedback In The Assimilation Of Information In Prediction Markets, Richard Donald Jolly

Dissertations and Theses

Leveraging the knowledge of an organization is an ongoing challenge that has given rise to the field of knowledge management. Yet, despite spending enormous sums of organizational resources on Information Technology (IT) systems, executives recognize there is much more knowledge to harvest. Prediction markets are emerging as one tool to help extract this tacit knowledge and make it operational. Yet, prediction markets, like other markets, are subject to pathologies (e.g., bubbles and crashes) which compromise their accuracy and may discourage organizational use.

The techniques of experimental economics were used to study the characteristics of prediction markets. Empirical data was gathered …

A Functional Approach To Memory-Safe Operating Systems, Rebekah Leslie

Dissertations and Theses

Purely functional languages--with static type systems and dynamic memory management using garbage collection--are a known tool for helping programmers to reduce the number of memory errors in programs. By using such languages, we can establish correctness properties relating to memory-safety through our choice of implementation language alone. Unfortunately, the language characteristics that make purely functional languages safe also make them more difficult to apply in a low-level domain like operating systems construction. The low-level features that support the kinds of hardware manipulations required by operating systems are not typically available in memory-safe languages with garbage collection. Those that are provided …

The Problem With Health Measurement., Stefan J. Cano, Jeremy C. Hobart

Peninsula Medical School

In this review we discuss health measurement with a focus on psychometric methods and methodology. In particular, we examine some of the key issues currently facing the use of clinician and patient rating scales to measure the health outcomes of disease and treatment. We present three key facts and flag one crucial problem. First, the numbers generated by scales are increasingly used as the measurements of the central dependent variables upon which clinical decisions are frequently made. The rising profile of rating scales has significant implications for scale construction, evaluation, and selection, as well as for interpreting studies. Second, rating …

Exploring The Map Of Medicine's Potential In Undergraduate Medical Education., Nicola Brennan, Karen Mattick

Peninsula Medical School

BACKGROUND: Map of Medicine is a web-based knowledge resource depicting evidence-based pathways of patient care. Recent publications suggest a possible role for the Map of Medicine as a training tool in postgraduate education. AIM: The aim of this study was to explore the potential of the Map of Medicine to enhance undergraduate medical education. METHODS: A mixed-method study including a survey of UK medical schools, and the embedding of the resource at one medical school and the evaluation of its impact. RESULTS: The survey found that only 1 of 23 medical schools was using the Map of Medicine in its …

Management Of Patient Adherence To Medications: Protocol For An Online Survey Of Doctors, Pharmacists And Nurses In Europe, W Clyne, C Mshelia, S Hall, S Mclachlan, Et Al

Peninsula Medical School

Introduction It is widely recognised that many patients do not take prescribed medicines as advised. Research in this field has commonly focused on the role of the patient in non-adherence; however, healthcare professionals can also have a major influence on patient behaviour in taking medicines. This study examines the perceptions, beliefs and behaviours of healthcare professionals—doctors, pharmacists and nurses—about patient medication adherence. Methods and analysis This paper describes the study protocol and online questionnaire used in a cross-sectional survey of healthcare professionals in Europe. The participating countries include Austria, Belgium, France, Greece, The Netherlands, Germany, Poland, Portugal, Switzerland, Hungary, Italy …

Flying High : An Aviation Education Curriculum For Middle And High School Students, Martin Rottler

Theses and Dissertations

No abstract provided.

The Near-Infrared Spectroscopy Of Two Main Belt Asteroids, 152 Atala And 245 Vera, Eric R. O'Dea

Theses and Dissertations

No abstract provided.

Use Of Multi-Stage Condensation In Fast Pyrolysis Of Biomass, Shankar Lande

Theses and Dissertations

No abstract provided.

A Musical Instrument Using In Vitro Neural Networks., Eduardo R. Miranda, Slawomir J. Nasuto, Anna R. Troisi, Julia H. Downes, Antonino Chiaramonte, Matthew C. Spencer, Mark W. Hammond, Dimitris Xydas, Benjamin J. Whalley, Victor M. Becerra, Kevin Warwick

School of Art, Design and Architecture

This paper presents a musical instrument, which uses in vitro neuronal networks to synthesise sounds. Cultures of dissociated neurons are grown on a dish with an embedded rectangular array of electrodes (MEA). Isolated neurons reconnect with one another via an extensive network of synaptically connected projections to form a dense monolayer of neurons. Cultures are provided with stimulation, which influences their activity, and can modify the culture’s state. The core of the sound synthesis engine of our musical instrument is a monophonic additive synthesizer using sinusoidal oscillators. We devised a method to generate frequencies, phase and amplitude values for the …

Influences On Hispanic Student Success At The Community College, Pierre Karin Lynn St.

Electronic Theses and Dissertations 2010 - 2019

The purpose of this study was to identify and understand Hispanic students' perceptions of the influences on their success at a community college. Using a qualitative design, six students were interviewed in depth in order to gain insight and perspective of their educational experience at the community college. The investigation explored each student's decision to enroll at the community college and sought to describe factors that the participants identified as having impacted their experiences at the community college, including their perceptions of themselves and their families. The study also explored the programs and practices that are in place in the …

You Can't Go Home Again: The Place Of Tradition In "Firefly's" Dystopian-Utopia And Utopian-Distopia, R Brown

School of Art, Design and Architecture

Science fiction has long been a site in which utopian-dystopian visions have been articulated. This paper uses one exemplar of this genre as a springboard into a discussion of the desire for a return to origin and of flawed attempts to impose an image of that origin, with discursions into illustrations drawn from contemporary conditions. In opposition to the hegemonic and reductive tendencies inherent in such attempts, this paper proposes an alternative which engages with the everyday reality of life. Intrinsic to this proposition is that our traditions and utopias must be founded upon a continual (re)making in the everyday.

Third Way Architecture: Between Cybernetics And Phenomenology, S Murrani

School of Art, Design and Architecture

This article in its essence aims to challenge and unfold, each at a time, two different fields of methodology – cybernetics and phenomenology – that have direct effects on the product of being and the process of becoming in architectural discourse. Furthermore, this article suggests a third way philosophy for architecture that relates notions of post-phenomenology and technoscience, and considers both to be equally vital to development and speculation within current architectural discourse. First, the history of each of the two fields – cybernetics and phenomenology – will be unveiled with a focus on exploring their impact upon architecture in …