Digital Commons Network^™

Transportation Network Resiliency: A Fuzzy Systems Approach, Nayel Urena Serulle

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Every day the dependence on transportation grows as local, regional, national, and international independence increases. Resilient transportation systems are needed to secure the highest possible level of service during disruptive events, including natural and man-made disasters. Because of limited resources, decision makers need guidance on how, when, and where to invest to improve resiliency of their networks. The research objective is to develop a method to assess and quantify resiliency, at pre-event conditions, using a fuzzy inference approach. This research expands previous work, refining key variable definitions, adjusting model interactions, and increasing transparency between metrics. This thesis presents the method …

Correspondence Of Job-Preference And Job-Matching Assessment With Job Performance And Satisfaction Among Youth With Developmental Disabilities, Julie Hall

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study investigated the effects of job preference and job match on job performance among four 19-to 20-year-old young adults with developmental disabilities placed in community-based job conditions. Prior studies have examined the effects of job preference on community-based job performance without the job-matching component. The researcher identified high-preference, high-match and low-preference, low-match job conditions and tasks using a video web-based assessment program. Each participant was subsequently placed in a randomized sequence of 30-min sessions on one high-preference, high-match job condition performing a preferred task and one low-preference, low-match job performing a non preferred task. Job coaches instructed and prompted …

Assessment Of Ruminal Fermentation Characteristics Of Condensed Tannin-Containing Forages Using Continuous Cultures, Christina Marie Williams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two independent studies were conducted to assess the effects of feeding condensed tannin (CT)-containing forages to continuous cultures to evaluate their impacts on ruminal fermentation and digestibility, with an emphasis on methane (CH4) and ammonia-N (NH3-N) production. In Chapter 3, treatments consisted of: 1) 100% alfalfa hay (AH), 2) 50% AH and 50% birdsfoot trefoil hay (dry matter (DM) basis; AHBFTH), and 3) 100% birdsfoot trefoil hay (BFTH). Three replicated runs lasted 8 d each, with the first 5 d allowed for microbial adaptation to the diets, and 3 d for data collection and sampling. Methane, neutral detergent fiber (NDF) …

Fabrication Of Multi-Material Structures Using Ultrasonic Consolidation And Laser-Engineered Net Shaping, John Olorunshola Obielodan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research explores the use of two additive manufacturing processes for the fabrication of multi-material structures. Ultrasonic consolidation (UC) and laser- engineered net shaping (LENS) processes were used for parallel systematic investigations of the process parameters and methodologies for the development of multi-material structures.

The UC process uses ultrasonic energy at low temperature to bond metallic foils. A wide range of metallic materials including nickel; titanium; copper; molybdenum; tantalum; MetPreg®; silver; stainless steel; and aluminum alloys 1100, 3003, and 6061 were bonded in different combinations. Material domains are inherently discrete in ultrasonically consolidated structures. The mechanical properties of some of …

Integration Of Ultrasonic Consolidation And Direct-Write To Fabricate An Embedded Electrical System Within A Metallic Enclosure, Ludwing A. Hernandez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A research project was undertaken to integrate Ultrasonic Consolitation (UC) and Direct-Write (DW) technologies into a single apparatus to fabricate embedded electrical systems within an ultrasonically consolidated metallic enclosure. Process and design guidelines were developed after performing fundamental research on the operational capabilities of the implemented system. In order to develop such guidelines, numerous tests were performed on both UC and DW. The results from those tests, as well as the design and process guidelines for the fabrication of an embedded touch switch, can be used as a base for future research and experimentation on the UC-DW apparatus. The successful …

Psychometric Properties Of Postsecondary Students' Course Evaluations, Michael J. Drysdale

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Several experts in the area of postsecondary student evaluations of courses have concluded that they are stable or reliable measures as well as being measures that provide ways of making valid inferences regarding teacher effectiveness. Often these experts have offered these conclusions without supporting evidence. Surprisingly, a thorough review of the literature revealed very few reported test-retest reliability studies of course evaluations and the results from these studies are contradictory. In the area of validity, the conclusions offered by scholars who conducted meta-analyses of mutlisection course studies are inconsistent. This leads to the following two research questions:

1. What is …

Axisymmetric Finite Element Modeling For The Design And Analysis Of Cylindrical Adhesive Joints Based On Dimensional Stability, Paul E. Lyon

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The use and implementation of adhesive joints for space structures is necessary for incorporating fiber-reinforced composite materials. Correct modeling and design of cylindrical adhesive joints can increase the dimensional stability of space structures. The few analytical models for cylindrical adhesive joints do not fully describe the displacement or stress field of the joint.

A two-dimensional axisymmetric finite element model for the design and analysis of adhesive joints was developed. The model was developed solely for the analysis of cylindrical adhesive joints, but the energy techniques used to develop the model can be applied to other types of joints as well. …

Analysis Of Field Programmable Gate Array-Based Kalman Filter Architectures, Arvind Sudarsanam

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A Field Programmable Gate Array (FPGA)-based Polymorphic Faddeev Systolic Array (PolyFSA) architecture is proposed to accelerate an Extended Kalman Filter (EKF) algorithm. A system architecture comprising a software processor as the host processor, a hardware controller, a cache-based memory sub-system, and the proposed PolyFSA as co-processor, is presented. PolyFSA-based system architecture is implemented on a Xilinx Virtex 4 family of FPGAs. Results indicate significant speed-ups for the proposed architecture when compared against a space-based software processor. This dissertation proposes a comprehensive architecture analysis that is comprised of (i) error analysis, (ii) performance analysis, and (iii) area analysis. Results are presented …

Sustainable Energy Crops: An Analysis Of Ethanol Production From Cassava In Thailand, Aerwadee Ubolsook

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The first essay formulates a dynamic general equilibrium optimal control model of an energy crop as part of a country's planned resource use over a period of time. The model attempts to allocate consumption, production, and factors of production to achieve the country's sustainable development goal. A Cobb-Douglas specification is used for both utility and production functions in the model. We calibrate the model with Thailand data. The selected model is used to generate the stationary state solution and to simulate the optimal policy function and optimal time paths. Two methods are used: a linear approximation method and the Runke-Kutta …

2010 December, Office Of Communications & Marketing, Morehead State University.

Morehead State Press Release Archive, 1961 to the Present

Press releases for December of 2010.

Rademacher-Type Formulas For Restricted Partition And Overpartition Functions, Andrew Sills

Mathematical Sciences: Faculty Publications

A collection of Hardy-Ramanujan-Rademacher type formulas for restricted partition and overpartition functions is presented, framed by several biographical anecdotes.

Openness Management By Figures As A Model Of Integrity And Transparency, Saad Ali Al-Anzi, Mustafa Muneer Isma'eel

Journal of Economics and Administrative Sciences

Competitive advantage is a substantial strategic objective for organizations. It requires high levels in the quality of products and services provided to customers, continuous improvement of costing , care for creativity and innovative employees, and speed unique to the marketing and financial engineering, and business re-engineering processes. The situation in this area, requires actors to attract and develop human resources, including help in proper implementation of the strategic tasks that targeted by those institutions. According to the opinions and viewpoints of management scholars, the competitive advantage resource is the most important issue for organizations in the third millennium, which can …

European Union Food Law Update, Emilie H. Leibovitch

Journal of Food Law & Policy

This EU Food Law Update will focus on the recent developments in the areas of genetically modified organisms, novel foods, feed safety, transmissible spongiform encephalopathy, salmonella and food borne diseases, food additives, organic farming, food contact materials, and labeling.

Tidal Current Energy Resource Assessment In Ireland: Current Status And Future Update, Fergal O'Rourke, Fergal Boyle, Anthony Reynolds

Articles

Interest in renewable energy in Ireland has increased continually over the past decade. This interest is due primarily to security of supply issues and the effects of climate change. Ireland imports over 90% of its primary energy consumption, mostly in the form of fossil fuels. The exploitation of Ireland’s vast indigenous renewable energy resources is required in order to reduce this over dependence on fossil fuel imports to meet energy demand. Various targets have been set by the Irish government to incorporate renewable energy technologies into Ireland’s energy market. As a result of these targets, the development in wind energy …

Change Has Been Good, Robert T. Howell

Journal of STEM Teacher Education

No abstract provided.

Repositioning The Facilities In Technical College Workshops For Efficiency: A Case Study Of North Central Nigeria, Ibrahim Y. Umar, Abdullahi S. Ma'aji

Journal of STEM Teacher Education

This article focuses on assessing the facilities in Government Technical College workshops in the context of a developing country. A descriptive survey design was adopted. Two research questions and a hypothesis were formulated to guide the study. A 35-item questionnaire was developed based on the National Board for Technical Education (NBTE) standards on Technical College workshops, and was validated by three experts. Data was collected from 101 administrators, 140 teachers, and 24 workshop personnel randomly sampled and stratified along trades in 19 Government Technical Colleges in North Central Nigeria. Mean was employed to answer the research questions while one-way analysis …

Openline Newsletter, December 2010, Civil Service Council

OpenLine Newsletter

A monthly newsletter for Civil Service employees, Volume XXXV, Number 6, December 2010.

Transient Fluid Flow Phenomena During Continuous Casting: Part I-Cast Start, Yufeng Wang, Lifeng Zhang

Materials Science and Engineering Faculty Research & Creative Works

This work presents a three-dimensional numerical simulation of transient fluid flow phenomena during continuous casting of steel. in the Part I, the process of cast start was investigated. Cast start involved the filling process and the caster start process. in the filling process, molten steel was continuously filled into the mold cavity with surrounding mold walls and a dummy bar head at the bottom. to simulate the interface between the molten steel and the air, an algorithm of volume of fluid has been employed. in the cast start process, the dummy bar was gradually dragged out with a low casting …

Low-Level Vibrations Maintain The Intervertebral Disc During Unloading, Nilsson Holguin

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Changes in intervertebral disc (IVD) biochemistry, morphology and mechanics have been characterized only incompletely in the rat hindlimb unloading (HU) model. Although exposure to chronic vibrations can be damaging, low-magnitude vibrations can attenuate the geometric changes of the IVD due to altered spinal loading. Here, we tested the hypothesis that low-magnitude, high-frequency vibrations will mitigate the hypotrophy, biochemical degradation and deconditioning of the IVD during HU. When applied as whole-body vibrations through all four paws, Sprague-Dawley rats were subjected to HU and exposed to daily periods (15min/d) of either ambulatory activities (HU+AMB) or whole body vibrations superimposed upon ambulation (HU+WBV; …

Separation, Deposition, And Characterization Of Single Stranded Dna On Polymer Coated Surfaces, Eli Hoory

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Stony Brook UniversityThe Graduate SchoolDoctoral Defense AnnouncementAbstractSeparation, Deposition, and Characterization of Single Stranded DNA on Polymer Coated SurfacesByEli HooryAnalysis of DNA structure and behavior, up to and including full sequencing of a genome's bases, and of biological processes such as replication, transcription and translation, is essential for an understanding of genetic variation, heritable diseases and the effects of environmental factors. Recently, single-molecule techniques have been developed to study DNA properties in unprecedented detail. For a number of these techniques, controlled adsorption of linearly stretched DNA molecules on surfaces is necessary. In experiments where hybridization of adsorbed molecules to labeled probes …

Overall Properties Of Piezoelectric Particulate Composites: Homogenization Estimates And Finite-Element Simulations, Sumantu Iyer

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

This work presents a) an analytic model based on homogenizationestimates to obtain explicit solutions for the effective properties ofparticulate piezoelectric composites and b) a three-dimensionalfinite-element model to compare finite-element results and study thebehaviour of porous piezoelectric composites with four differentgeometric configurations. The analytic model extends the Suquet[29] estimates method to the piezoelectric domain where acomplete set of electromechanical constants are obtained for threepiezoelectric ceramics belonging to different symmetry classes.Specific results are generated for the cases of a square arrangementof cylindrical pores, where the alignment of the pores is in thedirection of poling of the matrix phase and a cubic arrangement …

Performance Evaluation And Characterization Of Metallic Bipolar Plates In A Proton Exchange Membrane (Pem) Fuel Cell, Yue Hung

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Bipolar plate and membrane electrode assembly (MEA) are the two most repeated components of a proton exchange membrane (PEM) fuel cell stack. Bipolar plates comprise more than 60% of the weight and account for 30% of the total cost of a fuel cell stack. The bipolar plates perform as current conductors between cells, provide conduits for reactant gases, facilitate water and thermal management through the cell, and constitute the backbone of a power stack. In addition, bipolar plates must have excellent corrosion resistance to withstand the highly corrosive environment inside the fuel cell, and they must maintain low interfacial contact …

The Press And Democracy Building: Journalism Education And Training In Eastern And South-Eastern Europe During Transition, Michael Foley

Masters

Media assistance to the former communist countries of Eastern Europe from 1989 became an important part of the transformation of that part of Europe from a socialist command economy to a democratic, liberal market economy. The media was seen as an important ideological weapon of the previous regimes and so was to be transformed in order to change society. The exact amount of media aid is unknown, so much of it was hidden under such headings as aid to civil society and democracy building, but it is known to account for hundreds of millions of euro. Most was spent on …

Aggregation Is One Of The Challenges In Learning Probabilistic Relational Models, Saleh M., Jane Jaleel Stephan, Lamia Abed Noor

Iraqi Journal of Computers, Communications, Control and Systems Engineering

Aggregation is a tool used in presenting the multiple instances of an individual attribute in a single value that characterizes the groups represented. However, probabilistic relational models are constructed from relational data base; these data are interrelated with different cardinalities so it is needed for aggregation in some situations in order to convert the relation cardinality from “many” to “one”. This paper will shed light on the role of aggregation in learning probabilistic relational models through presenting two aggregate functions one is conventional and the other is proposed and compare their effects on the produced models. The results produced from …

A Proposed 512 Bits Rc6 Encryption Algorithm, Ashwaq T., Janan A. Mahdi, Salma H. Abdullah

Iraqi Journal of Computers, Communications, Control and Systems Engineering

In this paper, a new secret-key block cipher called 512 bits RC6 is proposed which is an eVolutionary improvement of the 128 bits RC6 designed to meet the requirements of the Advanced Encryption Standard (AES) to increase security and improve performance. The inner loop is based around the same round found in the 128 bits RC6. The proposed algorithm includes two things the first is doubling the pervious 128 bits RC6 to 256 bits RC6 and the second adapting a Feistal network which is iterated 256 bits RC6 20 times. A desirable property of an encryption algorithm is that a …

Investigation Of The Dynamic Response Of Hydraulic Actuator Using Vision System, Hussam K., Ali Haddy Nassir, Ali I. Mahddi

Iraqi Journal of Computers, Communications, Control and Systems Engineering

In this research, the dynamic response of the electro-hydraulic system was investigated and analyzed based on adeveloped vision system. An experimental setup, which consist ofhydraulic acircuit (tank, supply pump, pressure gauges, hydraulic actuator, and proportional directional valve) was developed and implemented. In addition, an electronic interface circuit used to control the proportional valve via a personal computer was built. The proposed vision system consistsof adigital video camera used to monitor the hydraulic actuator base on two types of camera poses; fixed and on-rod poses. Algorithms and computer programs were implemented for acquiring the image data from the gained video frames. …

Human Identification Using Normalized Energy Based Spectrum Eigenpalms, Hana'a M.

Iraqi Journal of Computers, Communications, Control and Systems Engineering

Biometrics, is defined as the since of Human recognition based on his/her physical or behavioral traits, is beginning to used as Human added computer method for determining an individual’s identity. The human hand presents the sorce for a numerous of physiological biometric features. Palmprint, hand geometry, finger geometry and the vein pattern on the dorsum of the hand, are mostly used in many fields for different applications. Lines and points are extracted from palms for individual identification in original image or frequency space. In this paper, the normalized energy based spectral eigenpalms is used for human identification. The correlation distance …

Modeling Of Induction Heating Systems Using Artificial Neural Networks, A. K. Al-Shaikhli, Hanan A. R. Akkar, Mohammed Moanes Ezzaldean Ali

Iraqi Journal of Computers, Communications, Control and Systems Engineering

Induction heating system has a number of inherent benefits compared to traditional heating systems. Many analytical and numerical approaches have been applied to solve the problem of induction heating. Artificial Neural Networks possess many advantages and have the ability to tackle problems that cannot be accomplished by more analytical and numerical methods. This paper inVolves modeling many artificial neural networks, and training them based on the results of analysis induction heating systems, by using ANSYS package, to enable them to evaluate the heat distribution inside the workpiece of any induction heating system. Also neural networks are used to specify the …

Modeling And Fuzzy Logic Controller Design For Laboratory Scale 3dof Uotcs Helicopter, Waladin K., Mothena Fakhri Shaker

Iraqi Journal of Computers, Communications, Control and Systems Engineering

The UOTCS (University Of Technology Control System) helicopter system is a laboratory scale experimental platform developed primarily for teaching system dynamics and control engineering principles to undergraduate students. It also provides an excellent research platform for control and mechatronics postgraduate students. This paper is concerned with the modeling and controllers design for the UOTCS helicopter to mimics its motion. The kinematics model was derived following the Denavit-Hartenberg theory while the dynamic model was based on Euler-Lagrange equations of motion. The helicopter mathematical model includes the inertias of the counterweight, the beams and the propeller motors. This model was found competent …

Cantor Fractal Linear Antenna Array With Koch Fractal Elements, Refat Talib, Mohannad Ahmad

Iraqi Journal of Computers, Communications, Control and Systems Engineering

Cantor fractal linear array, with ‘101’ generator from second stage of growth, is analyzed here with two types of current amplitude excitation coefficients (Dolph and Fractal). The Koch fractaldipole element with 2nd iteration and θ=60o will be used here as the array elements. Kaiser-Bessel window will be used as the generating function, to calculate the fractal amplitude excitation coefficients. The benefit from using fractal antenna element in the design of fractal antenna array will be clearly deduced from the results. The radiation pattern and impedance were calculated by using software package MATLAB version 7.6 (R2008a) and software package 4NEC2 respectively.