Engineering Commons^™

Experimental Investigation Of Cfrp Wrapped Square Non-Ductile Reinforced Concrete Columns, Hayder Lateef Al-Khafaji

Dissertations and Theses

The use of fiber-reinforced polymers (FRP) for retrofitting or strengthening deficient concrete columns noticeably increased in the past few decades. Plenty of research has been conducted on the behavior of FRP-strengthened circular concrete columns, but far less research has dealt with non-circular columns. In the current study, the focus was to investigate the behavior of square columns with low to medium grade concrete and low steel reinforcement that were strengthened using carbon fiber reinforced polymer (CFRP) wrap. In the experimental portion of this investigation, twelve short square reinforced concrete columns (5" x 5" in cross section and 12" high) were …

Determination Of Aqueous Surfactant Solution Surface Tensions With A Surface Tensiometer, Remelisa Esteves, Birce Dikici Ph.D, Matthew Lehman, Qayyum Mazumder, Nonso Onukwuba

Beyond: Undergraduate Research Journal

Surfactant solutions are applicable to engineering systems for cooling equipment for electronics. Surfactants can be added to water to improve heat transfer. An application of using aqueous surfactant solutions can be through microchannel heat sink. Although it is ideal to redesign these systems to reduce heat, it is a costly method. Surfactant solutions at optimal solution concentration can be able to transfer heat quickly and effectively with minimum expense. The surface tension of surfactant solutions is an important parameter for boiling heat transfer and must be taken into consideration. The purpose of this research is to measure surface tension of …

Determination Of Surfactant Solution Viscosities With A Rotational Viscometer, Remelisa Esteves, Nonso Onukwuba, Birce Dikici Ph.D

Beyond: Undergraduate Research Journal

Aqueous surfactant solutions are used in engineering systems for improving boiling heat transfer. The purpose of this research is to determine the viscosities of surfactant solutions and to investigate the effect of composition on viscosity. The results obtained can possibly be used as reference for further study in the effects of surfactant solution viscosities on nucleate boiling. A rotational viscometer was used to determine the viscosities of three surfactant solutions – SLS, EH-14, and SA-9 – of various compositions at room temperature. It was discovered that the viscosities of SLS, EH-14, and SA-9 had a nearly consistent pattern as their …

Extracting Vibration Characteristics Of A Guitar Using Finite Element, Modal Analysis, And Digital Image Correlation Techniques, Kiran Patil, Javad Baqersad, Daniel Ludwigsen, Yaomin Dong

Physics Publications

The sound quality generated by the guitar depends on the vibration characteristics (i.e. natural frequencies and mode shapes) of this instrument. Thus, it is of particular interest to the guitar manufacturers to be able to obtain global information about the characteristics of the guitar. Traditional sensors can only measure at discrete locations. However, digital image correlation (DIC) can measure full-field data on the surface of the structure. In the current paper, a finite element (FE) model of a guitar with free boundary configurations was developed using quadratic solid elements. An eigensolution was performed on the FE model to determine its …

Overview Of Lte Spectrum Sharing Technologies, Yun Ye, Dalei Wu, Zhihui Shu, Yi Qian

Department of Electrical and Computer Engineering: Faculty Publications

Long-Term Evolution (LTE) communication systems feature advanced frequency reuse and interference coordination techniques providing faster and more secured mobile services. However, the network capacity in licensed spectrum is still behind market demands. Dynamic spectrum access or spectrum sharing in other frequently vacant or unlicensed frequency bands is considered an effective means to boost system throughput. Different from operations in licensed spectrum with exclusive access, LTE deployment needs to take into account the distinct regulations on channel access to each shared frequency band, in order to avoid interference to incumbent users, and to maintain fair play with peer operators in heterogeneous …

A Family Of Optimized Lms-Based Algorithms For System Identification, Silviu Ciochinǎ, Constantin Paleologu, Jacob Benesty, Steven L. Grant, Andrei Anghel

Electrical and Computer Engineering Faculty Research & Creative Works

The performance of the least-mean-square (LMS) algorithm is governed by its step-size parameter. In this paper, we present a family of optimized LMS-based algorithms (in terms of the step-size control), in the context of system identification. A time-variant system model is considered, and the optimization criterion is based on the minimization of the system misalignment. Simulations performed in the context of acoustic echo cancellation indicate that these algorithms achieve a proper compromise in terms of fast convergence/tracking and low mis adjustment.

Information Technology News, Georgia Southern University

Information Technology: News & Publications (2012-2023)

• IT Faculty Spotlight: Hayden Wimmer

Underwater Scene Search Scheme Via Similarity Measure And Sparse Representation For Autonomous Underwater Vehicle, Zhiyuan Wang, Yue Geng, Congcong Shi, Rui Nian, Bo He, Tianhong Yan, Amaury Lendasse

Engineering Management and Systems Engineering Faculty Research & Creative Works

Underwater Scene Search Turns Out to Be One of the Most Challenging Topics in the Underwater Image Analysis. in This Paper, We Present One Underwater Scene Search Scheme Combined with Similarity Measure and Sparse Representation. the Color Histogram is First Adopted to Classify the Candidate Image Patches for Each Kind of the Underwater Scene. at the Same Time, the Feature Similarity (FSIM) Considers a Full Reference of the Complementary Terms, I.e., the Phase Congruency (Pc) and the Image Gradient Magnitude (Gm), to Reflect and Generate the Similarity Map between the Query Image Patch and the Reference One. Sparse Representation is …

Species Distribution Model For Swift Fox In Nebraska, Lucia Corral Hurtado

Nebraska Department of Transportation: Research Reports

No abstract provided.

High Performance Computing Applied To Structural Analysis Of Concrete Structures, Jose A. Mena Ortiz

Civil Engineering ETDs

Continuum mechanics models are the main tool in structural analysis. Due to

their continuity assumption, some of them do not predict accurately the behavior of

concrete structures. While these models are widely used by design engineers, many

are flawed for fundamental reasons.

The State-Based Peridynamic Lattice Model (SPLM) is presented in this thesis

as a viable alternative to continuum models. The SPLM is shown to have a simple

formulation that allows the engineer to fully understand the underlying theory. The

elastic, plastic and damage SPLM models are presented. Moreover, SPLM is shown

to be capable of modelling essential mechanisms in …

Underwater Image Enhancement Strategy With Virtual Retina Model And Image Quality Assessment, Yaomin Wang, Ruijie Chang, Ruinian, Bo He, Xunfei Liu, Jen Hwa Guo, Amaury Lendasse

Engineering Management and Systems Engineering Faculty Research & Creative Works

Underwater Image Enhancement is One of the Most Essential and Fundamental Tasks in Ocean Investigations Recent Years. in This Paper, We Made an Attempt to Develop One Adaptive Underwater Image Enhancement Approach with the Help of the Virtual Retina Model and the Image Quality Assessment (IQA). the Virtual Retina Model, Which Yields Comparatively High Correlation with the Human Vision System, is First Taken to Achieve Simultaneous Ambiguity Removing and Detail Enhancing of Single Image Due to the Specific Mechanisms of Different Retinal Sub-Layers. after This, an Adaptive Image Enhancement Strategy is Taken with One Kind of No-Reference Image Quality Assessment …

Underwater Non-Rigid 3d Shape Reconstruction Via Structure From Motion For Fish Ethology Research, Renzheng Che, Xiao Xu, Rui Nian, Bo He, Meimei Chen, Cheng Zhang, Amaury Lendasse

Engineering Management and Systems Engineering Faculty Research & Creative Works

In This Paper, We Try to Develop a General Framework of 3d Shape Reconstruction Strategy with Extremely Rare Point Cloud Extracted for Fish Ethology Research. Particle Filter is First Taken to Focus on Fish Trajectory Tracking from Monocular Video Sequence. the Speeded Up Robust Features (Surf) Technique Will Be Adopted to Match the Same Tracking Fish Across the overlapping View Fields with More Stable and Accurate Features. Non-Rigid 3d Shape Reconstruction Will Be Finally Developed with the Help of Expectation Maximization (Em) Model and Linear Dynamical System (LDS). It is Shown from Our Simulation Experiment that the Developed Scheme of …

Evaluating Alternative Scheduling Rules To Improve Scheduling Performance, Bryan Allan White

Theses and Dissertations

In this study a powder painting production line was examined for the purpose of improving on its scheduling. A simulation model was developed to compare the performance of alternative scheduling rules. The simulation model utilized scheduling data from the original system in order to determine how accurately it represented the original system. The model was built using the discrete event simulation software Arena. The validated model was used to test a set of scheduling rules that would change the sequence in which orders in the queue were processed. By looking at the different rules and the effects on the final …

Diversity And Impacts Of Mining On The Non-Volant Small Mammal Communities Of Two Vegetation Types In The Brazilian Amazon, Natália Carneiro Ardente, Átilla Colombo Ferreguetti, Donald Gettinger, Pricila Leal, Ana Cristina Mendes-Oliveira, Fernanda Martins-Hatano, Helena Godoy Bergallo

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The CarajaÂs National Forest contains some of the largest iron ore deposits in the world. The majority of the minerals are found below a plant community known as Savana Metalo fila, or ªCangaº, which represents only 3% of the landscape within the CarajaÂs National Forest (CNF). The aim of our study was to understand the diversity of community of non-volant small mammals in the two predominant vegetation types: Ombrophilous Forest and Canga, and to examine how mining impacts these communities. Sampling was conducted from January 2010 to August 2011 in 11 sampling sites divided by the total area of Canga …

Adaptive Classification Framework For Control Myoelectric Prostheses During Muscle Fatigue, Hamdi Allbunashee Allbunashee

Theses and Dissertations

A myoelectric-controlled prosthesis holds the promise of renewed quality of life for the amputee population. When it comes to prosthesis control, muscle fatigue presents a significant challenge for all task discrimination algorithms due to changed muscle activation patterns and significant shifts in the spectral contents of the surface electromyogram (sEMG) signals. The effect of muscle fatigue on the classification accuracy of two supervised machine-learning algorithms, i.e. the linear discriminant analysis (LDA), and the muscle synergy based task discrimination (MSD) was investigated. Due to muscle fatigue, the classification accuracies declined from (>90%) to 41% and 59% for the LDA and …

An Application Programming Interface For Parliamentary Procedure, Grant David Bourque

Honors Capstones

No abstract provided.

Quantifying An Aquifer Nitrate Budget And Future Nitrate Discharge Using Field Data From Streambeds And Well Nests, Troy E. Gilmore, David P. Genereux, Kathleen M. Farrell, Helena Mitasova

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Novel groundwater sampling (age, flux, and nitrate) carried out beneath a streambed and in wells was used to estimate (1) the current rate of change of nitrate storage, dS_NO3 /dt, in a contaminated unconfined aquifer, and (2) future [NO₃^–]_FWM (the flow-weighted mean nitrate concentration in groundwater discharge) and f_NO3 (the nitrate flux from aquifer to stream). Estimates of dS_NO3 /dt suggested that at the time of sampling (2013) the nitrate storage in the aquifer was decreasing at an annual rate (mean = –9 mmol/m²yr) equal …

Loss-Induced Enhanced Transmission In Anisotropic Density-Near-Zero Acoustic Metamaterials, Chen Shen, Yun Jing

Henry M. Rowan College of Engineering Departmental Research

Anisotropic density-near-zero (ADNZ) acoustic metamaterials are investigated theoretically and numerically in this paper and are shown to exhibit extraordinary transmission enhancement when material loss is induced. The enhanced transmission is due to the enhanced propagating and evanescent wave modes inside the ADNZ medium thanks to the interplay of near-zero density, material loss, and high wave impedance matching in the propagation direction. The equi-frequency contour (EFC) is used to reveal whether the propagating wave mode is allowed in ADNZ metamaterials. Numerical simulations based on plate-type acoustic metamaterials with different material losses were performed to demonstrate collimation and subwavelength imaging enabled by …

Development Of Metal Matrix Composite Gridlines For Space Photovoltaics, Omar K. Abudayyeh

Chemical and Biological Engineering ETDs

Space vehicles today are primarily powered by multi-junction photovoltaic cells due to their high efficiency and high radiation hardness in the space environment. While multi-junction solar cells provide high efficiency, microcracks develop in the crystalline semiconductor due to a variety of reasons, including: growth defects, film stress due to lattice constant mismatch, and external mechanical stresses introduced during shipping, installation, and operation. These microcracks have the tendency to propagate through the different layers of the semiconductor reaching the metal gridlines of the cell, resulting in electrically isolated areas from the busbar region, ultimately lowering the power output of the cell …

Be Students Visit Nasa | Biological Engineering, Usu College Of Engineering

College of Engineering News

Early in November students from Utah State University's Biological Engineering program presented their research project, Eden, to the Scientists and Engineers employed by NASA.

Investigation Of Jet Dynamics In Cross-Flow: Quantifying Volcanic Plume Behavior, Graham Freedland

Dissertations and Theses

Volcanic eruption columns inject high concentrations of ash into the atmosphere. Some of this ash is carried downwind forming ash clouds in the atmosphere that are hazardous for private and commercial aviation. Current models rely on inputs such as plume height, duration, eruption rate, and meteorological wind fields. Eruption rate is estimated from plume height using relations that depend on the rate of air entrainment into the plume, which is not well quantified. A wind tunnel experiment has been designed to investigate these models by injecting a vertical air jet into a cross-flow. The ratio of the cross-flow and jet …

Importance Of Heat And Pressure For Solubilization Of Recombinant Spider Silk Proteins In Aqueous Solution, Justin A. Jones, Thomas I. Harris, Paula F. Oliveira, Brianne E. Bell, Abdulrahman Alhabib, Randolph V. Lewis

Biology Faculty Publications

The production of recombinant spider silk proteins continues to be a key area of interest for a number of research groups. Several key obstacles exist in their production as well as in their formulation into useable products. The original reported method to solubilize recombinant spider silk proteins (rSSp) in an aqueous solution involved using microwaves to quickly generate heat and pressure inside of a sealed vial containing rSSp and water. Fibers produced from this system are remarkable in their mechanical ability and demonstrate the ability to be stretched and recover 100 times. The microwave method dissolves the rSSPs with dissolution …

Building The Education And Training Pillar Of The University Of Tennessee’S Institute For Nuclear Security, Howard Lewis Hall

International Journal of Nuclear Security

The University of Tennessee (UT) developed its first formal and coordinated efforts in nuclear security education in 2008-2009 with its graduate certificate program in nuclear security in the Department of Nuclear Engineering. Building on this work, in 2011 UT established the UT Institute for Nuclear Security (INS) as a collaborative center at the university to expand its curricular impact as well as foster research and partnerships with nearby major governmental facilities engaged in nuclear security work. Oak Ridge National Laboratory (ORNL), the Y-12 National Security Complex (Y-12), and Oak Ridge Associated Universities (ORAU) have joined with UT as charter members …

Promoting Excellence And Demonstrated Competence For Nuclear Security Training, Daniel Johnson, Brunelle Battistella, Roger Howsley

International Journal of Nuclear Security

The international community has spent considerable time, money, and effort attempting to establish a series of national and regional Centres of Excellence (COEs), also known as Nuclear Security Training and Support Centres (NSSCs). These Centres tend to have a wide variety of objectives, structures, and methods of delivery. Unsurprisingly, no internationally accepted standard exists on how they should operate. The IAEA has produced some excellent guidance (TECDOC 1734), but by virtue of its role cannot provide standards for benchmarking success. Against this backdrop, the World Institute for Nuclear Security (WINS) launched the WINS Academy, an initiative to provide practitioners with …

Spray Printing Of Organic Semiconducting Single Crystals, Grigorios-Panagiotis Rigas, Marcia M. Payne, John E. Anthony, Peter N. Horton, Fernando A. Castro, Maxim Shkunov

Chemistry Faculty Publications

Single-crystal semiconductors have been at the forefront of scientific interest for more than 70 years, serving as the backbone of electronic devices. Inorganic single crystals are typically grown from a melt using time-consuming and energy-intensive processes. Organic semiconductor single crystals, however, can be grown using solution-based methods at room temperature in air, opening up the possibility of large-scale production of inexpensive electronics targeting applications ranging from field-effect transistors and light-emitting diodes to medical X-ray detectors. Here we demonstrate a low-cost, scalable spray-printing process to fabricate high-quality organic single crystals, based on various semiconducting small molecules on virtually any substrate by …

Nuclear Security Education At Pakistan Institute Of Engineering And Applied Sciences (Pieas): Current Status, Future Prospects And The Lessons Learnt, Tariq Majeed Dr.

International Journal of Nuclear Security

In this paper, the details of nuclear security education at Pakistan Institute of Engineering and Applied Sciences (PIEAS) have been discussed. Nuclear Security education was initiated at PIEAS as a sub-specialty of its MS Nuclear Engineering Program in October 2009. Two courses, Nuclear Security (NE-581) and Physical Protection Systems (NE-582) have been offered on regular basis in the 3^rd and 4^th semesters. To date, 72 students have been graduated with this sub-specialty. The most important lesson learnt is that introduction of nuclear security related courses in nuclear engineering program has opened up new venues of applications of nuclear …

Nuclear Security And Hrd - Viet Nam’S Effort, Nu-Hoai-Vi Nguyen, Tan Huu Vuong

International Journal of Nuclear Security

Viet Nam is expanding its nuclear energy program for the application in various areas including industries, agriculture, healthcare, education and research. Recognizing the importance of the nineteen issues laid out in the IAEA document “Milestones in Development of a National Infrastructure for Nuclear Power” [1], Vietnam is considering how to address these issues. This paper describes the establishment of nuclear security infrastructure in Viet Nam and how Viet Nam has addressed one of the nineteen issues, that is human resource development in nuclear energy in general and in nuclear security in particular.

Challenges And Responses For Ensuring Sustainability Of Insa Training Programs, Jongsook Kim, Hyung-Kyung Lee, Jin-Young Lee

International Journal of Nuclear Security

Providing a systematic training is critical for a state or international perspective to reinforce nuclear security regime nationally or internationally. Korea government recognizes the importance of such challenge, and established the INSA under the KINAC as a Center of Excellence for fostering national nuclear security capacity and contributing international nuclear security governance. INSA started with the government policy that the establishment of sustainable education and training infrastructure and processes is fundamental to the capacity building strategy. After established, INSA has been designing and delivering the domestic and international/regional training programs for the purpose of fostering human resources development in nuclear …

The Utility Of Table-Top Exercises In Teaching Nuclear Security, Christopher Hobbs, Luca Lentini, Matthew Moran

International Journal of Nuclear Security

In the emerging field of nuclear security, those responsible for education and training are constantly seeking to identify and engage with tools and approaches that provide for a constructive learning environment. In this context, this paper explores the nature and value of Tabletop exercises (TTX) and how they can be applied in the nuclear security context. On the one hand, the paper dissects the key components of the TTX and considers the broader pedagogical benefits of this teaching method. On the other hand, the paper draws lessons from the authors’ experience of running TTXs as part of nuclear security professional …

Single Site Robotc Device And Related Systems And Methods, Jack Mondry, Shane M. Farritor, Eric Markvicka, Thomas Frederick, Joseph Bartels

Department of Mechanical and Materials Engineering: Faculty Publications

The embodiments disclosed herein relate to various medical device components, including components that can be incor porated into robotic and/or in vivo medical devices. Certain embodiments include various medical devices for in vivo medical procedures.