Engineering Commons^™

An Electrochemical Investigation In The Anticorrosive Properties Of Silver Nanoparticles For The Acidic Corrosion Of Aluminium, H. A. Fetouh, B. A. Abd-El-Nabey, Y. M. Goher, M. S. Karam

Journal of Electrochemistry

The mass loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques were used for the determinations of the corrosion rates for aluminium in 1.0 mol·L^-1 hydrochloric acid (HCl) solutions both in the absence and presence of silver nanoparticles (SNPs) at 30 ℃. The protection efficiency was evaluated to be 96.4% for 0.014 g·L^-1 of the SNPs. It has been found that the capacity of the electrical double layer at the aluminium/solution interface was decreased with increasing the concentration of the SNPs, indicating that the SNPs were adsorbed at the aluminium surface. The Langmuir adsorption isotherm and the kinetic-thermodynamic …

Usu Engineering Faculty Partners With National Federation Of The Blind To Develop Non-Visual Teaching Methods | College Of Engineering, Usu College Of Engineering

College of Engineering News

A researcher at Utah State University is developing non-visual techniques to teach the fundamentals of engineering to students who are blind or low vision.

The 3d Stress-Tensor Bootstrap, Anatoly Dymarsky, Filip Kos, Petr Kravchuk, David Poland, David Simmons-Duffin

Physics and Astronomy Faculty Publications

We study the conformal bootstrap for 4-point functions of stress tensors in parity-preserving 3d CFTs. To set up the bootstrap equations, we analyze the constraints of conformal symmetry, permutation symmetry, and conservation on the stress-tensor 4-point function and identify a non-redundant set of crossing equations. Studying these equations numerically using semidefinite optimization, we compute bounds on the central charge as a function of the independent coefficient in the stress-tensor 3-point function. With no additional assumptions, these bounds numerically reproduce the conformal collider bounds and give a general lower bound on the central charge. We also study the effect of gaps …

Developing Pennycress ( Thlaspi Arvense ) As A Biodiesel Feedstock Crop And Plant Model System, Michaela Mcginn

Theses and Dissertations

Thlapsi arvense L. (pennycress) is currently being developed as a profitable oilseed-producing winter annual cover crop with extreme cold tolerance and a rapid life cycle that can be grown on fallow farmland throughout the U.S. Midwest Corn Belt, controlling soil erosion and nutrient runoff while serving as an additional source of income for the American farmer without displacing food crops. The research comprising this dissertation demonstrates that pennycress can serve as a user-friendly model system highly similar to Arabidopsis thaliana, and is well-suited for both laboratory and field experimentation, being readily employable in existing growth facilities. After 10 generations of …

Development Of A Liquid Contacting Method For Investigating Photovoltaic Properties Of Pbs Quantum Dot Solids, Vitalii Alekseevich Dereviankin

Dissertations and Theses

Photovoltaic (PV) devices based on PbS quantum dot (QD) solids demonstrate high photon-to-electron conversion yields. However, record power conversion efficiencies remain limited mainly due to bulk and interfacial defects in the light absorbing material (QD solids). Interfacial defects can be formed when a semiconductor, such as QD solid, is contacted by another material and may predetermine the semiconductor/metal or semiconductor/metal-oxide junction properties. The objective of the work described in this dissertation was set to explore whether electrochemical contacting using liquid electrolytes can provide sufficient means of contacting the QD solids to investigate their PV performance without introducing the unwanted interfacial …

Research Benefits For Scholarly Authors Being Published On A Public Forum, Hunter M. Watson, Brent D. Bowen, Timothy B. Holt, Jacqueline R. Luedtke

Publications

The previous construct of research was focused on social media platforms as a benefactor in broadcasting towards a global audience with non-academic professions. Following along the same ideology, this research directs the attention to a pertained audience in academic profession.

•Embry-Riddle is the host of Scholarly Commons which collects the research of authors (faculty members), and assists in developing a digital portfolio. This portfolio creates metric measurements on a dashboard to indicate where downloads are occurring, and aids in providing current information pertaining to the authors’ publication. •In this case, the publication of the National Airline Quality Rating (AQR) ( …

Information Technology News, Georgia Southern University

Information Technology: News & Publications (2012-2023)

• Georgia Southern ranked No. 8 on the 2018 Military Times 10 Best Cybersecurity Programs list

Symmetric Equations For Evaluating Maximum Torsion Stress Of Rectangular Beams In Compliant Mechanisms, Guimin Chen, Larry L. Howell

Faculty Publications

There are several design equations available for calculating the torsional compliance and the maximum torsion stress of a rectangular cross-section beam, but most depend on the relative magnitude of the two dimensions of the cross-section (i.e., the thickness and the width). After reviewing the available equations, two thickness-to-width ratio independent equations that are symmetric with respect to the two dimensions are obtained for evaluating the maximum torsion stress of rectangular cross-section beams. Based on the resulting equations, outside lamina emergent torsional joints are analyzed and some useful design insights are obtained. These equations, together with the previous work on symmetric …

Screening Algorithm Based On The Color Halftone Fluorescent Printing And Its Application In Packaging Design, Hu Yaojian, Liu Juan, Wang Ruojing, Zhong Yunfei

Journal of Applied Packaging Research

Abstract：This paper analyzed the characteristics of colorless fluorescent ink and the existing color separation theory, so that colored additive method should be used in printing color pattern with colorless fluorescent ink as well as three-color screening separation type (red, green and blue). Considering the exhibition of the tone, this paper selected dot parallel screening method. At the same time, through comparing the properties of different dots, this paper adopted a special method of AM screening, using regular triangle as the basic dot model to a threshold matrix of AM screening. Finally, designing a screening algorithm which best suit the …

Upending Assumptions In Engineering Education | College Of Engineering, Usu College Of Engineering

College of Engineering News

It doesn’t make Idalis Villanueva uncomfortable to confront assumptions.

Three Dimensional View Of Arbitrary Q Syk Models, Sumit R. Das, Aminik Ghosh, Antal Jevicki, Kenta Suzuki

Physics and Astronomy Faculty Publications

In [15] it was shown that the spectrum and bilocal propagator of SYK model with four fermion interactions can be realized as a three dimensional model in AdS₂ ×S¹/Z₂ with nontrivial boundary conditions in the additional dimension. In this paper we show that a similar picture holds for generalizations of the SYK model with q-fermion interactions. The 3D realization is now given on a space whose metric is conformal to AdS₂ × S¹/Z₂ and is subject to a non-trivial potential in addition to a delta function at the center of …

A Longitudinal Analysis On The Cyclical Pattern Of The U.S. Airline Industry, Michelle M. Bennett, Brent D. Bowen, Jacqueline R. Luedtke, Dean Headley, Timothy B. Holt

Publications

The Airline Quality Rating (AQR) is the nation’s most comprehensive study of airline performance and quality for over two decades. AQR provides consumers and industry watchers a means to compare performance quality among different US airlines using objective performance-based data. This research looks to analyze the cyclical patterns present in AQR in order to identify trends and factors contributing to the changes in these results each year. This research utilizes the application of a longitudinal analysis methodology which will provide the correlation between factors identified and the indicators affected.

Respirable Dust Monitoring In Construction Sites And Visualization In Building Information Modeling Using Real-Time Sensor Data, Nour Smaoui, Kyungki Kim, Omprakash Gnawali, Young-Joo Lee, Wonho Suh

Durham School of Architectural Engineering and Construction: Faculty Publications

Construction activities, involving cutting, drilling, and grinding of materials, often produce toxic respirable dust that can cause fatal diseases and illnesses. To protect workers from breathing excessive amounts of respirable dust at job sites, superintendents should continuously monitor the level of respirable dust in workspaces and make timely interventions for overexposed workers. However, current practices of respirable dust monitoring have critical drawbacks, and superintendents cannot accurately estimate workers’ exposures to respirable dust or make prompt decisions to protect the workers. Therefore, there is a need for real-time air dust monitoring that can be deployed ubiquitously at a construction site and …

Non-Stationary Vibrations Of Three-Layered Viscoelastic Plate, R.I. Xalmuradov, Kh. Hudaynazarov, Z.B. Xudoyberdiyev

Scientific Journal of Samarkand University

Theory of non-stationary vibrations of three- layered viscoelastic plate from 2D statement of problem on the basis of exact solutions of the equations of the linear viscoelasticity theory in transformations is developed. The equations of symmetric vibration infinite three - layered plate concerning two principal functions which are bodies of displacements of some intermediate surface of a middle layer are received. The algorithm allowing to define of SSS by required functions unequally the of arbitrary layer of the plate is offered.

Hierarchical Random Boolean Network Reservoirs, Sai Kiran Cherupally

Dissertations and Theses

Reservoir Computing (RC) is an emerging Machine Learning (ML) paradigm. RC systems contain randomly assembled computing devices and can be trained to solve complex temporal tasks. These systems are computationally cheaper to train than other ML paradigms such as recurrent neural networks, and they can also be trained to solve multiple tasks simultaneously. Further, hierarchical RC systems with fixed topologies, were shown to outperform monolithic RC systems by up to 40% when solving temporal tasks. Although the performance of monolithic RC networks was shown to improve with increasing network size, building large monolithic networks may be challenging, for example because …

The Santa Clara, 2018-02-22, Santa Clara University

The Santa Clara

No abstract provided.

Universal Phase Unwrapping For Phase Measuring Profilometry Using Geometry Analysis, Jianwen Song, Yo-Sung Ho, Daniel L. Lau, Kai Liu

Electrical and Computer Engineering Faculty Publications

Traditionally temporal phase unwrapping for phase measuring profilometry needs to employ the phase computed from unit-frequency patterned images; however, it has recently been reported that two phases with co-prime frequencies can be absolutely unwrapped each other. However, a manually man-made look-up table for two known frequencies has to be used for correctly unwrapping phases. If two co-prime frequencies are changed, the look-up table has to be manually rebuilt. In this paper, a universal phase unwrapping algorithm is proposed to unwrap phase flexibly and automatically. The basis of the proposed algorithm is converting a signal-processing problem into a geometric analysis one. …

The Role Of Mentoring In The Careers Of Female Airline Transport Pilots, Paul E. Cline

International Journal of Aviation, Aeronautics, and Aerospace

Women have been a part of aviation since its inception, yet they have been traditionally underrepresented in the ranks of commercial pilots. This study explored what role mentoring played in the lives and careers of female Airline Transport Pilots (ATP).

It was determined that there was no statistically significant difference in self-reported perceptions of success between female ATP who had been mentored and those who had not. Of the female ATP who had been mentored, those who reported an informal mentoring relationship rated their relationship higher than those who reported a formal mentoring relationship when it came to career oriented …

Effect Of Anthropometric Variability On Middle-Market Aircraft Seating, Tara C. Sriram

International Journal of Aviation, Aeronautics, and Aerospace

A middle-of-market aircraft, or MoMA, is defined as an aircraft capable of flying 180-250 passengers without refueling for 2,300-5,800 miles(~2,000-5,000 nautical miles). As the name suggests, middle-of-market aircraft are positioned in between the market segments served by narrow body (single-aisle) and wide body (twin-aisle) aircraft. This paper presents the findings of a study on the effect of anthropomorphic variability on economy class seating on middle-market aircraft currently in service. The study found that among 130 middle-market LOPAs, the mean seat pitch was greater for US airlines than for Asian airlines. Furthermore, the sampled Asian airlines had a higher preference …

Aerodynamic Analysis Of Low Speed Wing Design Using Taguchi L9 Orthogonal Array, Kenneth Witcher, Ian Mcandrew, Elena Vishnevskaya

Publications

The study of aerodynamics has been preoccupied with understanding flight at increasing speeds and ultimately supersonic. Today, this pursuit has advanced the science for both Hypersonic and Transonic flight to near Mach 1 supporting economical commercial flight operations. This research presents the data from a Taguchi array on low speed with twin wing designs to establish the design parameters for their use in low speed and high altitude. Also presented is how aerodynamic advantages can be achieved through understanding the interactions of parameters and their use. This is compared to operational effectiveness when applied to remotely piloted aircraft that are …

Advanced Energy Storage Technologies And Their Applications (Aesa2017), Rui Xiong, Hailong Li, Xuan Joe Zhou

Electrical & Computer Engineering Publications

The depletion of fossil fuels, the increase of energy demands, and the concerns over climate change are the major driving forces for the development of renewable energy, such as solar, wind and wave energy. However, the intermittency of renewable energy has hindered its large-scale deployment, which, therefore, has necessitated the development of advanced energy storage technologies. The use of large-scale energy storage can effectively improve the efficiency of energy resource utilization, and increase the adoption of variable renewable resources, the energy access, and the end-use sector electrification (e.g., electrification of transport sector).

Preventing Crossover In Redox Flow Batteries Through Active Material Oligomerization, Susan A. Odom

Chemistry Faculty Publications

No abstract provided.

Effect Of Molecular Side Groups And Local Nanoenvironment On Photodegradation And Its Reversibility, Nicole Quist, Mark Li, Ryan Tollefsen, Michael Haley, John Anthony, Oksana Ostroverkhova

Chemistry Faculty Publications

Degradation of organic semiconductors in the presence of oxygen is one of the bottlenecks preventing their wide-spread use in optoelectronic devices. The first step towards such degradation in functionalized pentacene (Pn) derivatives is formation of endoperoxide (EPO), which can either revert back to the parent molecule or proceed to molecule decomposition. We present the study of reversibility of EPO formation through probing the photophysical properties of functionalized fluorinated pentacene (Pn-R-F8) derivatives. Experiments are done in solutions and in films both at the single molecule level and in the bulk. In solutions, degradation of optical absorption and its partial recovery after …

Walking (And Cycling) To Well-Being: Modal And Other Determinants Of Subjective Well-Being During The Commute, Patrick A. Singleton

Civil and Environmental Engineering Faculty Publications

Although transportation’s impacts on physical health are relatively well-established, the relationship between transportation and subjective well-being (SWB) has been the subject of recent focus. Policymakers attempt to improve the health and well-being of populations through interventions to improve transportation experiences and promote sustainable transport modes, while researchers studying these connections seek valid and reliable measures of SWB in the travel domain. Studies consistently find travel by walking and bicycling to be rated more positively than automobile travel, yet many use single measures of travel SWB, obscuring nuanced variations between modes.

Using the results of a Portland, Oregon, survey of nearly …

Review Of The Utah Snow Load Study, Marc Maguire, Brennan Bean, Yan Sun

Civil and Environmental Engineering Faculty Publications

Proper consideration of snow loads in building design can be a delicate balancing act:

• Underestimates lead to structure failure
• Overestimates lead to increased construction costs

Low Reynolds Number Numerical Simulation Of The Aerodynamic Coefficients Of A 3d Wing, Khurshid Malik, Waqar Asrar, Erwin Sulaeman

International Journal of Aviation, Aeronautics, and Aerospace

A low Reynolds number, three-dimensional CFD analysis is carried out for a finite flat plate wing using the commercial CFD code STAR CCM+. The six-aerodynamic force and moment components C_L, C_D, C_M, C_N, C_l, C_Y and their derivatives are computed at a Reynolds numbers of 3x10⁵ by varying the pitch, roll and yaw angles about the quarter chord point. The computed results have been validated with experimental aerodynamic balance data when possible. The results indicate that roll and yaw angle affect the aerodynamic coefficients of the flat plate …

Choosing Stem College Majors: Exploring The Role Of Pre-College Engineering Courses, L. Allen Phelps, Eric M. Camburn, Sookweon Min

Journal of Pre-College Engineering Education Research (J-PEER)

Despite the recent policy proclamations urging state and local educators to implement integrated science, technology, engineering, and mathematics (STEM) curricula, relatively little is known about the role and impact of pre-college engineering courses within these initiatives. When combined with appropriate mathematics and science courses, high school engineering and engineering technology (E&ET) courses may have the potential to provide students with pre-college learning experiences that encourage them to pursue STEM college majors. Our central research question was: What is the nature and extent of any relationship between high school E&ET course completion and subsequent selection of a STEM major in a …

Back Matter, Adfsl

Annual ADFSL Conference on Digital Forensics, Security and Law

No abstract provided.

Front Matter, Adfsl

Annual ADFSL Conference on Digital Forensics, Security and Law

No abstract provided.

Contents, Adfsl

Annual ADFSL Conference on Digital Forensics, Security and Law

No abstract provided.