Digital Commons Network^™

Coupled Thermal Mechanical Analysis Methodology For Thermal Performance Evaluation And Failure Mode Identification Of Thermal Barrier Coatings For Heavy Duty Diesel Engines, Sean Moser

All Dissertations

Consumer demand and government regulation, as well as the Department of Energy’s SuperTruck program has motivated extraordinary effort to maximize the heavy-duty diesel engine’s thermal efficiency. Thermal barrier coatings (TBCs) provide an avenue for increasing the thermal efficiency of the mixing controlled combustion (MCC) process through the reduction of heat transfer losses. The myriad of previous studies presents conflicting conclusions, both in the merit of TBCs for cycle improvement, and also for coating durability and potential adverse effects from coating failure. While the most recent studies with thin thermal barrier coatings (~100-250 µm) have shown a majority of positive cycle …

An Algorithm For Biobjective Mixed Integer Quadratic Programs, Pubudu Jayasekara Merenchige

All Dissertations

Multiobjective quadratic programs (MOQPs) are appealing since convex quadratic programs have elegant mathematical properties and model important applications. Adding mixed-integer variables extends their applicability while the resulting programs become global optimization problems. Thus, in this work, we develop a branch and bound (BB) algorithm for solving biobjective mixed-integer quadratic programs (BOMIQPs). An algorithm of this type does not exist in the literature.

The algorithm relies on five fundamental components of the BB scheme: calculating an initial set of efficient solutions with associated Pareto points, solving node problems, fathoming, branching, and set dominance. Considering the properties of the Pareto set of …

Capillary Driven Transport In Soft Solids, Saiful Islam Tamim

All Dissertations

Soft solids, such as polymeric gels, are elastic materials that can be significantly deformed by capillary forces which act at the interface. The coupling between elasticity and capillarity is known as elastocapillarity and is useful to wide ranging applications, from drop pinchoff of bioinks for 3-D printing tissue scaffolds, to generating droplet patterns on microfluidic devices. In this dissertation, we develop mathematical models of elastocapillary driven motions in soft solids. The focus is on understanding the relevant physics in such complex phenomena, while also recovering the limiting cases of classical fluid mechanics and solid mechanics theories.

This dissertation investigates two …

Evapotranspiration In Mid-South Rice Production, Colby Wade Reavis

Graduate Theses and Dissertations

Rice provides much needed sustenance to a large portion of the global population, particularly in the developing world. With stress placed on food production systems under the reality of climate change and an increasing global population, rice production systems require solutions to a number of issues, including a limited water supply. As producers explore new strategies for conserving local water resources to continue to maintain yields, new irrigation strategies and technologies are being developed and validated for use at commercial production scales. Alternate wetting and drying (AWD) is an irrigation practice that provides water savings through the capture of rainfall …

Image Encryption Paillier Homomorphic Cryptosystem, Zainab Mohammed, Hala Bahjat, Abdul Mohssen Jaber Abdul Hossen

Iraqi Journal of Computers, Communications, Control and Systems Engineering

With the increasing use of media in communications, both academia and industry pay attention to the content security of digital images. This research presents a Homomorphic cryptosystem-based asymmetric picture encryption technique (Paillier). The algorithm is used for securing images that transmit over public unsecured channels. The Homomorphic property is used in this paper, which is comprised of three steps: key generation, encryption, and decryption. To realize such approach, the encryption cryptosystem must support additional operation over encrypted data. This cryptosystem can be effective in protecting images and supporting the construction of programs that can process encrypted input and produce encrypted …

Speaker Recognition System Based On Mel Frequency Cepstral Coefficient And Four Features, Ashraf Tahseen, Hasanen S., Mohammad N. Fadhil

Iraqi Journal of Computers, Communications, Control and Systems Engineering

Biometrics signs are the most important factor in the human recognition field and considered an effective technique for person authentication systems. Voice recognition is a popular method to use due to its ease of implementation and acceptable effectiveness. This original_study will introduce a speaker recognition system that consists of preprocessing techniques to eliminate noise and make the sound smoother. For the feature extraction stage, the method Mel Frequency Cepstral Coefficient (MFCC) is used, and in the second step, the four features (FF) Mean, Standard Division, Zero-Cross and Amplitude, which added to (MFCC) to improve the results. For data representation, vector …

3d Textured Model Encryption Using 2d Logistic And 3d Lorenz Chaotic Map, Nashwan Alsalam, Abdul Monem S., Shaimaa H. Shaker

Iraqi Journal of Computers, Communications, Control and Systems Engineering

The widespread of recent multimedia, including various 3D model applications in different domains of areas, may lead to 3D models being stolen and attacked by hackers. Moreover, 3D models must be protected from unauthorized users and when transmitting over the internet. Nowadays the 3D model protection is a very important Issue. This paper proposed a scheme that provides high protection for the textured 3D model by implementing multiple levels of security. The first level of security is achieved by encrypting the texture map based on a key generated by a 2D Logistic chaotic map. The second level of security is …

Pest Interceptions On Imported Fresh Fruits Into South Africa, Livhuwani R. Nnzeru, Phumudzo P. Tshikhudo, Bester T. Mudereri, Moleseng C. Moshobane

All Peer-Reviewed Publications

Global trade through imports and exports of commodities brings an excessive risk of accidental introduction of invasive alien species in many countries. South Africa imports a range of fresh fruits and other commodities to complement its local production. Despite the substantial impacts of these invasive alien species, relatively little is known about the pathways and origins by which these organisms arrive in South Africa. In this study, we analyzed the susceptibility of South Africa to introduced plant-feeding pests detected from imported consignments of fresh fruits into the country over 10 years between 2009 and 2018. The analysis was conducted from …

2021 Taxonomic Update Of Phylum Negarnaviricota (Riboviria: Orthornavirae), Including The Large Orders Bunyavirales And Mononegavirales, Jens H. Kuhn, Scott Adkins, Bernard R. Agwanda, Rim Al Kubrusli, Sergey V. Alkhovsky, Gaya K. Amarasinghe, Tatjana Avšič-Županc, María A. Ayllón, Justin Bahl, Anne Balkema-Buschmann, Matthew J. Ballinger, Christopher F. Basler, Sina Bavari, Martin Beer, Nicolas Bejerman, Andrew J. Bennett, Dennis A. Bente, Éric Bergeron, Brian H. Bird, Carol D. Blair, Kim R. Blasdell, Dag Ragnar Blystad, Jamie Bojko, Wayne B. Borth, Steven Bradfute, Rachel Breyta, Thomas Briese, Paul A. Brown

All Peer-Reviewed Publications

In March 2021, following the annual International Committee on Taxonomy of Viruses (ICTV) ratification vote on newly proposed taxa, the phylum Negarnaviricota was amended and emended. The phylum was expanded by four families (Aliusviridae, Crepuscuviridae, Myriaviridae, and Natareviridae), three subfamilies (Alpharhabdovirinae, Betarhabdovirinae, and Gammarhabdovirinae), 42 genera, and 200 species. Thirty-nine species were renamed and/or moved and seven species were abolished. This article presents the updated taxonomy of Negarnaviricota as now accepted by the ICTV.

Serving Special Education Students In The Music Classroom: Accommodating And Advocating For Learners With Exceptionalities, Kathryn Lambert

Masters Theses

Music education programs positively impact the lives of students both socially and emotionally. As the following research suggests, music may have an even greater impact on students with disabilities or exceptionalities. Due to the lack of accessibility, funding, time, training, and other issues, opportunities in music education programs may be limited to groups of students who may not fit the standard music education student profile. As teachers of common core classes may struggle to accommodate students with exceptionalities and may feel as if they are lacking in resources or other needed preparation to adequately serve these students, these struggles are …

Institute For Global Health And Development : Issue 1 - December 2021, Institute For Global Health And Development

IGHD Newsletters

• Climate Change and Environment Sustainability
• Agriculture, Food Security, and Nutrition
• Gender Equality and Women Empowerment
• Sustainable Development Goals

Using Fuzzy Inference To Evaluation Suppliers In Diyala General Electric Industries Company, Safa Basim Ayed, Wakas S. Khalaf

Journal of Economics and Administrative Sciences

The research aims to evaluate the suppliers at Diyala general electric industries company conducted in an environment of uncertainty and fuzzy where there is no particular system followed by the company, and also aims to use the problem of traveling salesman problem in the process of transporting raw materials from suppliers to the company in a fuzzy environment. Therefore, a system based on mathematical methods and quantity was developed to evaluate the suppliers. Fuzzy inference system (FIS) and fuzzy set theory were used to solve this problem through (Matlab) and the problem of the traveling salesman in two stages was …

Arkansas Soybean Research Studies 2020, Jeremy Ross

Arkansas Agricultural Experiment Station Research Series

The 2020 Arkansas Soybean Research Studies includes research reports on topics pertaining to soybean across several disciplines from breeding to post-harvest processing. Research reports contained in this publication may represent preliminary or only data from a single year or limited results; therefore, these results should not be used as a basis for long-term recommendations. Several research reports in this publication will appear in other University of Arkansas System Division of Agriculture’s Arkansas Agricultural Experiment Station publications. This duplication is the result of the overlap in research coverage between disciplines and our effort to inform Arkansas soybean producers of the research …

Thinkmed: Providing An Environment For Disadvantaged Students To Explore Stem, Steven Trinh, Lauren Dudley, Peter Chang

Student Scholar Symposium Abstracts and Posters

ThinkMED is a nonprofit initiative offering a four-week curriculum specifically designed to develop critical thinking and encourage evidence-based decision making. Each week’s content material revolves around the use of a ThinkMED Science Kit containing a wet lab experiment designed to supplement the content curriculum. Each experiment is formulated to be inclusive of all California Next Generation Science Standards K through 5. Contained within each week’s ThinkMED Science Kit is a unique QR code that directs the student to an interactive simulation of the experiment created by our team of computer scientists and graphic designers. At the end of each week, …

Fall 2021 Student Scholar Symposium Abstract Volume, Chapman University Center For Undergraduate Excellence

Student Scholar Symposium Abstracts and Posters

No abstract provided.

Raising The Level Of Environmental Concern Of Senior Students Taking The Electronics Engineering Laws And Ethics Through Climate Change Awareness Study, King Harold A. Recto, Romano Q. Neyra

Electronics, Computer, and Communications Engineering Faculty Publications

Two general areas that future electronics engineers are honed are competence and character. Most of the courses he takes fall in the general area of competence. This includes subjects like Circuit Theory, Electronic Design and Analysis, Communication Systems, and the like. Subjects dealing with character, in contrast, are limited. In some universities, it may just be Electronics Engineering (ECE) Laws and Ethics and the focus is on “engineering made by man for man.” In this traditional view of Engineering, the environment is often neglected since it’s not about “man” (as opposed to the “society”). Over the last years, however, concerns …

Notions Of Explainability And Evaluation Approaches For Explainable Artificial Intelligence, Giulia Vilone, Luca Longo

Articles

Explainable Artificial Intelligence (XAI) has experienced a significant growth over the last few years. This is due to the widespread application of machine learning, particularly deep learning, that has led to the development of highly accurate models that lack explainability and interpretability. A plethora of methods to tackle this problem have been proposed, developed and tested, coupled with several studies attempting to define the concept of explainability and its evaluation. This systematic review contributes to the body of knowledge by clustering all the scientific studies via a hierarchical system that classifies theories and notions related to the concept of explainability …

3d Printing In Cardiology: A Review Of Applications And Roles For Advanced Cardiac Imaging, Ellen M. Lindquist, Jordan M. Gosnell, Sana K. Khan, John L. Byl, Weihua Zhou, Jingfeng Jiang, Et. Al.

Michigan Tech Publications, Part 1

With the rate of cardiovascular diseases in the U.S increasing throughout the years, there is a need for developing more advanced treatment plans that can be tailored to specific patients and scenarios. The development of 3D printing is rapidly gaining acceptance into clinical cardiology.

In this review, key technologies used in 3D printing are briefly summarized, particularly, the use of artificial intelligence (AI), open-source tools like MeshLab and MeshMixer, and 3D printing techniques such as fused deposition molding (FDM) and polyjet are reviewed. The combination of 3D printing, multiple image integration, and augmented reality may greatly enhance data visualization …

Heavy Sediment Deposition In The Yangtze Estuary, Following Initial Impoundment Of Three Gorges Dam, Boyuan Zhu, Gexuanzi Luo, Yao Yue, Enhang Liang, Alistair G.L. Borthwick, Yitian Li

School of Engineering, Computing and Mathematics

Although the initial impoundment of the Three Gorges Dam in 2003 caused a significant reduction in fluvial sediment load, heavy sediment deposition occurred within the Yangtze Estuary during 2002-2009. To gain a clear recognition of this phenomenon, the present study examines the roles of fluvial water and sediment discharges, coastal dynamics and estuarine engineering projects playing in the Yangtze estuarine erosion-deposition process. Results show that runoff discharge is the dominant factor, performing as that the alternate high and low runoff events in the Yangtze basin are associated with the cycles of morphological erosion and deposition in the Yangtze Estuary. Accordingly, …

A Comparison Of Multiple Machine Learning Algorithms To Predict Whole-Body Vibration Exposure Of Dumper Operators In Iron Ore Mines In India, Rahul Upadhyay, Amrites Senapati, Ashis Bhattacherjee, Aditya Kumar Patra, Snehamoy Chatterjee

Michigan Tech Publications, Part 1

Background: This study deals with some factors that influence the exposure of whole-body vibration (WBV) of dumper operators in surface mines. The study also highlights the approach to improve the multivariate linear analysis outcomes when collinearity exists between certain factor pairs.

Material and Methods: A total number of 130 vibration readings was taken from two adjacent surface iron ore mines. The frequency-weighted RMS acceleration was used for the WBV exposure assessment of the dumper operators. The factors considered in this study are age, weight, seat backrest height, awkward posture, the machine age, load tonnage, dumper speed and haul …

2021 December, Morehead State University. Office Of Communications & Marketing.

Morehead State Press Release Archive, 1961 to the Present

Press releases for December of 2021.

A Mathematical Formulation For Establishing The Relationship Of Accuracy And Configuration Of Data Acquisition In Close Range Photogrammetry., A. El-Oraby

Mansoura Engineering Journal

No abstract provided.

Comparison Between Nelson-Olson Method And Two-Stage Limited Dependent Variables (2sldv) Method For The Estimation Of A Simultaneous Equations System (Tobit Model), Fulla Makee Ahmed, Eman Mohammed Abdullah

Journal of Economics and Administrative Sciences

This study relates to the estimation of a simultaneous equations system for the Tobit model where the dependent variables ( ) are limited, and this will affect the method to choose the good estimator. So, we will use new estimations methods different from the classical methods, which if used in such a case, will produce biased and inconsistent estimators which is (Nelson-Olson) method and Two- Stage limited dependent variables(2SLDV) method to get of estimators that hold characteristics the good estimator . That is , parameters will be estimated for the limited variables and find the variance-covariance matrix for extracted estimators …

Comparison Of Some Semi-Parametric Methods In Partial Linear Single-Index Model, Huda Yahya Ahmed, Munaf Yousif Hmood

Journal of Economics and Administrative Sciences

The research dealt with a comparative study between some semi-parametric estimation methods to the Partial linear Single Index Model using simulation. There are two approaches to model estimation two-stage procedure and MADE to estimate this model. Simulations were used to study the finite sample performance of estimating methods based on different Single Index models, error variances, and different sample sizes , and the mean average squared errors were used as a comparison criterion between the methods were used. The results showed a preference for the two-stage procedure depending on all the cases that were used

Mobilizing Discomfort For Water Security As A Human Right: A Newspaper Analysis Of Social Conflict In South Africa, Madison Gonzalez

Graduate Program in International Studies Theses & Dissertations

There are 884 million people globally that do not have access to improved drinking water, while 2.5 billion do not have improved access to sanitation (Office of the High Commissioner for Human Rights, 2010). Those living in informal settlements and slums—what I call the ‘solidaric disaffiliated’ zones—represent one such location where individuals around the world have found themselves in a situation of neglected crisis as their geographic, economic, and social expulsion pushes them beyond the reach of opportunity and access to basic human rights such as water and sanitation. As individuals feel their dignity deteriorating due to the extreme precarity …

Confidence Interval For The Mean Of A Beta Distribution, Sean Rangel

Electronic Theses and Dissertations

Statistical inference for the mean of a beta distribution has become increasingly popular in various fields of academic research. In this study, we developed a novel statistical model from likelihood-based techniques to evaluate various confidence interval techniques for the mean of a beta distribution. Simulation studies will be implemented to compare the performance of the confidence intervals. In addition to the development and study involving confidence intervals, we will also apply the confidence intervals to real biological data that was gathered by the Department of Biology at Stephen F. Austin State University and provide recommendations on the best practice.

The Philosophy Of Outliers: Reintegrating Rare Events Into Biological Science, Chelsea N. Cook, Angela R. Freeman, James C. Liao, Lisa A. Mangiamele

Biological Sciences: Faculty Publications

Individual variation in morphology, physiology, and behavior has been a topic of great interest in the biological sciences.While scientists realize the importance of understanding diversity in individual phenotypes, historically the minority results (i.e., outlier observations or rare events) of any given experiment have been dismissed from further analysis. We need to reframe how we view outliers to improve our understanding of biology. These rare events are often treated as problematic or spurious, when they can be real rare events or individuals driving evolution in a population. It is our perspective that to understand what outliers can tell us in our …

Illinois State University, One Hundred And Sixty-Second Annual Commencement, December 2021, Illinois State University

Commencement Programs

Illinois State University
One Hundred and Sixty-Second Annual Commencement
December 2021

Making It To The Next Grade: How Elementary School Principals Make Sense Of Grade Retention Policies For English Learners, Lynmara Colón

Educational Leadership & Workforce Development Theses & Dissertations

Critical approaches to policy suggest that policy, even in the most apparently democratic polity or institution, codifies and extends the interests of those who disproportionately wield power (Levinson et al., 2009). While many people are involved in conversations and decisionmaking processes related to the implementation of grade retention or promotion policies, the final decision is made at the school level. Critics of grade retention, meanwhile, also warn that retained students may be harmed by stigmatization, reduced expectations for their academic performance on the part of teachers and parents, and the challenges of adjusting to a new peer group (Schwerdt et …

Towards Characterizing Adversarial Opportunity And Behavior In Critical Infrastructure Network, Md Sharif Ullah

Electrical & Computer Engineering Theses & Dissertations

The growth of information and communication technology is constantly revolutionizing various domains, e.g., energy utility systems, healthcare, the internet of things, etc. This inception of widespread cyber technology enables reliability and first operability of the system, yet simultaneously imposed a risk of significant impact due to disruption of safe and secure operation. The attack surface is expanding, creating a cyber exposure gap which indicates a higher threat landscape and increased risk of compromise. Motivated by this increased threat exposure, this dissertation investigates the attack surface as a static and dynamic indicator of adversary propagation, seeking an efficient modeling paradigm to …