Engineering Commons^™

Prototype Catalytic Membrane Reactor For Dimethyl Ether Synthesis Via Co2hydrogenation, Qiaobei Dong, Weiwei L. Xu, Xiao Fan, Huazheng Li, Naomi Klinghoffer, Travis Pyrzynski, Howard S. Meyer, Xinhua Liang, Miao Yu, Shiguang Li

Chemical and Biochemical Engineering Faculty Research & Creative Works

Dimethyl ether (DME) has become attractive as a potential environmentally friendly substitute for diesel and liquefied petroleum gas (LPG) due to its similar properties to those of LPG, high cetane number, but less carbon emissions. In this work, we developed a novel prototype-scale catalytic membrane reactor to synthesize DME directly from CO₂and renewable H₂, which could address the environmental and fuel security issues in a cost-effective way. This membrane reactor was equipped with superior hydrophilic NaA zeolite membranes and bifunctional Cu-ZnO-ZrO₂-Al₂O₃/HZSM-5 catalysts. The effects of the reaction temperature and gas …

Élimination Des Vapeurs Toxiques Par Oxydation : Développement De Procédures D'Évaluation Des Systèmes De Purification De L'Air Des Conduits De Ventilation, Chang-Seo Lee, Fariborz Haghighat, Alireza Haghighat Mamaghani, Zahra Shayegan, Ali Bahloul, Mélanie Huard, Lexuan Zhong, Mitra Bahr

Rapports de recherche scientifique

L'exposition à des composés organiques volatils (COV) dans les lieux de travail peut avoir des effets aigus, notamment sous forme d'irritation de la peau, des yeux, de la bouche et du nez. Certains produits peuvent également provoquer des effets chroniques, comme l'asthme et le cancer. La prévention de tels effets nocifs sur la santé des travailleurs par l'adoption et la mise en œuvre de mesures visant à en éliminer ou à tout le moins réduire le risque s'avère importante. Parmi les approches développées à ce jour pour réduire l'exposition aux polluants de l'air intérieur – dont les COV –, la …

Removal Of Toxic Vapors By Oxidation: Development Of Laboratory Test Procedures For In-Duct Air Cleaning Systems, Chang-Seo Lee, Fariborz Haghighat, Alireza Haghighat Mamaghani, Zahra Shayegan, Ali Bahloul, Mélanie Huard, Lexuan Zhong, Mitra Bahr

Rapports de recherche scientifique

L'exposition à des composés organiques volatils (COV) dans les lieux de travail peut avoir des effets aigus, notamment sous forme d'irritation de la peau, des yeux, de la bouche et du nez. Certains produits peuvent également provoquer des effets chroniques, comme l'asthme et le cancer. La prévention de tels effets nocifs sur la santé des travailleurs par l'adoption et la mise en œuvre de mesures visant à en éliminer ou à tout le moins réduire le risque s'avère importante. Parmi les approches développées à ce jour pour réduire l'exposition aux polluants de l'air intérieur – dont les COV –, la …

Molecular Dynamics Simulations Of Cyanine Dimers Attached To Dna Holliday Junctions, Austin Biaggne, Young C. Kim, Joseph S. Melinger, William B. Knowlton, Bernard Yurke, Lan Li

Materials Science and Engineering Faculty Publications and Presentations

Dye aggregates and their excitonic properties are of interest for their applications to organic photovoltaics, non-linear optics, and quantum information systems. DNA scaffolding has been shown to be effective at promoting the aggregation of dyes in a controllable manner. Specifically, isolated DNA Holliday junctions have been used to achieve strongly coupled cyanine dye dimers. However, the structural properties of the dimers and the DNA, as well as the role of Holliday junction isomerization are not fully understood. To study the dynamics of cyanine dimers in DNA, molecular dynamics simulations were carried out for adjacent and transverse dimers attached to Holliday …

Biomaterials With Diverse Physical & Chemical Signals For Tissue Engineering Applications, Mohammed Mehdi Benmassaoud

Theses and Dissertations

Cells within natural tissues are exposed to a myriad of biochemical and biophysical cues, and it is challenging to recapitulate these signals in vitro. The goal of this dissertation is to create materials with distinct biophysical and biochemical signals as platforms that induce controllable yet diverse cellular responses. To evaluate the effects of heterogeneous biophysical cues on cell behavior, cells were encapsulated in porous scaffold-hydrogel composites, and it was found that cellular metrics (morphology, matrix mechanosensing) varied within soft (hydrogel) and rigid (scaffold) composite regions. To create soft materials with spatially defined biochemical signals, hydrogels that can be subsequently photopatterned …

Seal For A Wave Rotor Disk Engine, Christopher Tait, Pejman Akbari, Brian Sell, Marc D. Polanka

AFIT Patents

A unique seal for a wave rotor disk engine is disclosed herein. The seal is operable for sealing a region between a rotor and a rotor casing. The seal is spring loaded and will engage with the tip of the rotor to reduce pressure loss within the wave rotor disk engine.

Effect Of Supporting Base System On The Flexural Behavior And Toughness Of The Lighting Gfrp Poles, Mahmoud T. Nawar, Mostafa E. Kaka, Ayman El-Zohairy, Osama Elhosseiny

Faculty Publications

Due to the high risk of common traffic electric poles, the use of glass fiber reinforced polymer (GFRP) material in electric poles has become essential due to its excellent advantages such as high strength to weight ratio, corrosion resistance, and electrical insulation, which keeps people safe. To reduce the accidental effect of street lighting poles on humans, the generated energy during the collision must be absorbed. Experimental and numerical investigations were carried out to identify the efficiency of tapered GFRP electric poles with handle doors using steel sleeve bases until the occurrence of failure. Six full-scale cantilever bending tests were …

فاعلية نظام مساعد للتنقل باستخدام وحدة إظهار حسية من وجهة نظر المكفوفين لدى عينة من الطلبة المكفوفين في جامعة دمشق. Impact Of A Mobility Assistant System Using A Sensory Display From The Perspective Of The Blind Among A Sample Of Blind Students At Damascus University, حسن أبو النور, ماهر العلاوي

Association of Arab Universities Journal for Education and Psychology

تهدف هذه الدراسة إلى معرفة مدى فاعلية نظام مساعد للمكفوفين في كشف العوائق المحيطة بهم، وكذلك قياس مدى تكيفهم معه، والتعرف على آرائهم حول تصميمه، لدى عينة من طلبة جامعة دمشق المكفوفين، والمقيمين في المدينة الجامعية. تكونت عينة الدراسة من(32) طالباً، وطالبة، منهم (17) طالباً و(15) طالبةً. قام الباحث بتصميم نظام مساعدة الكترونية، لمساعدة المكفوفين في الكشف المكاني للعوائق، حيث قام الباحث بتدريب أفراد العينة بشكل كافٍ على نظام المساعدة. كما تمّ تصميم أداة للتعرف على مدى فاعلية نظام المساعدة للمكفوفين في التنقل، باستخدام وحدة الإظهار, واستخرج الخصائص السيكومترية للصدق، والثبات. وأسفرت الدراسة عن نتائج، من أهمها: وجود مستوى كبير …

Preface For Millard Beatty, E. Baesu, Roger Fosdick

Department of Mechanical and Materials Engineering: Faculty Publications

Professor Beatty has contributed a wide variety of research papers and book articles on topics in finite elasticity, continuum mechanics and classical mechanics, including some fundamental experimental work. His works are clear and informative and expose a didactic quality. In the following, we briefly touch upon some of the highlights of his research involvement throughout the years.

Student Perceptions Of Meaningful Learning, Behaviors Towards Learning Experiences, And Academic Performance In Aeronautical Courses: A Quantitative Research Study, Andrea Lynn Smith

Doctoral Dissertations and Projects

Current literature on the predictive correlation between a student’s perceived course value and their end-of-course results utilizing the Course Valuing Inventory (Nehari & Bender, 1978) has not been studied in aeronautics education. While research investigating various attributes of academic success exists, quantitative studies specifically addressing predictive variables of course success related to end-of-course grades in aeronautics education do not exist. Given the results of quantitative data, aeronautics academia can strategically implement specific variables into course planning and designing to create academic content that appeals to aeronautic students. The purpose of this quantitative, predictive correlational study is to examine the predictive …

Carbonate-Superstructured Solid Fuel Cells With Hydrocarbon Fuels, Hanrui Su, Wei Zhang, Yun Hang Hu

Michigan Tech Publications, Part 1

A basic requirement for solid oxide fuel cells (SOFCs) is the sintering of electrolyte into a dense impermeable membrane to prevent the mixing of fuel and oxygen for a sufficiently high open-circuit voltage (OCV). However, herein, we demonstrate a different type of fuel cell, a carbonate-superstructured solid fuel cell (CSSFC), in which in situ generation of superstructured carbonate in the porous samarium-doped ceria layer creates a unique electrolyte with ultrahigh ionic conductivity of 0.17 S.cm21 at 550 °C. The CSSFC achieves unprecedented high OCVs (1.051 V at 500 °C and 1.041 V at 550 °C) with methane fuel. Furthermore, the …

Loss Analysis Of Conventional And Three Level Boost Dc-Dc Converters Employed For Mppt In Pv Systems. The Research Article Analyzes The Losses Incurred In Three Level Boost Converter And Conventional Boost Converter Employed For Pv Applications., Raghavendra Rao P Dr

Technical Collection

Photovoltaic (PV) systems are often exposed to nonuniform insolation due to shading. Under these conditions, there exists multiple peaks in their power-voltage (P-V) characteristics and among which there is one global maximum power point (GMPP). Several GMPP tracking methods employed in the literature have focused mainly on the tracking efficiency. But the PV system output must include the DC-DC converter losses also, to get the actual estimate of the power extracted. Hence, this article attempts to analyse the losses incurred in the DCDC converters namely conventional boost converter (CBC) and three-level boost converter (TLBC) connected to a PV array. It …

Design And Development Of Computer-Based Decision Support Systems To Aid Clinicians For Screening & Early Detection Of Diseases, And Better Treatment Plan., P C Siddalingaswamy

Technical Collection

Artificial Intelligence (AI) methods are increasing in prominence in all fields of medical science and are especially pertinent to modern ophthalmology and dermatology as follows. Diabetes mellitus, a metabolic disorder, has become one of the rapidly increasing health threats both in India and worldwide. The complication of the diabetes associated to retina of the eye is diabetic retinopathy. A patient with the disease must undergo periodic screening of eye. Limited number of specialist ophthalmologists in most of the countries motivates the need for AI for analysis of retinal images. This could reduce the workload of ophthalmologists, also aid in diagnosis. …

Hybrid Sensors, Kv Santhosh

Technical Collection

With the ever increasing demand of quality product, efficient automation is of prime requirement. Automation involves the process of monitoring and control. Efficient monitoring is only possible with the best sensing mechanism. Conventional characteristics of sensors like accuracy, range, sensitivity, etc is not just sufficient for achieving the desired objective. Characteristics like cooperation, competition and complementary is the need of the hour.

Concept of a hybrid sensor involves the implementation of multi-sensor system architecture, such that each of the sensors will compliment and/or cooperate and/or compete with each of the other sensor to achieve the complete and efficient monitoring.

Research …

Tectono-Metamorphic And Mineral Exploration Studies On Precambrian Age Group Rocks To Search New Mineral Resources In India, Aditya Udayraj Joshi Dr

Technical Collection

Precambrian rocks are thoroughly important to understand the early development of the crust on our globe. As per the geological time scale, out of 4600 Ma, 88.23% of the total time has been spent on the formation of these rocks, which signifies that to decode early earth's history, these rocks are the best windows to peep in - to visualize paleo-tectonics, important as well as rear melts, and even are best suitable sources to secure derivatives of deeper parts of the earth. The plethora of rocks generated during this Eon are not only the inherent witnesses of the type of …

Global Maximum Power Point Tracking Algorithms, The Research Articles Propose Novel Algorithms 1. To Track Global Peak Under Fast Changing Partial Shading Conditions Using Current Control Approach. 2. To Track Global Peak Using Voltage And Current Perturbation-Based Technique., Raghavendra Rao P

Technical Collection

The power – voltage (P-V) characteristics of photovoltaic (PV) systems exhibit multiple power peaks under partially shaded conditions. It is essential to extract maximum energy from the PV system. Several global maximum power point tracking (GMPPT) algorithms that are present in the literature, track the GMPP using different methods. It is imperative to have minimal convergence time for the GMPPT process. The work carried out uses a novel modified current control approach that uses current as a parameter to detect the insolation change during the tracking phase and track the global peak under fast changing partial shading conditions without any …

Engineering News, Fall 2022, School Of Engineering

Engineering News

No abstract provided.

Illuminator, Volume 5, Issue 3, Batten College Of Engineering And Technology, Old Dominion University

College of Engineering & Technology Newsletter

October 2022 issue of Illuminator, a monthly publication of ODU's Batten College of Engineering and Technology.

Homogenous Flow Performance Of Steel Fiber-Reinforced Self-Consolidating Concrete For Repair Applications: Developing A New Empirical Set-Up, Naimeh Nouri, Masoud Hosseinpoor, Ammar Yahia, Kamal Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In this study, a new empirical Square-Box test was employed to evaluate the homogeneous flow performance of fiber-reinforced self-consolidating concrete (FR-SCC) under confined-flow conditions that are typical of repair applications. The Square-Box set-up consisted of a closed-circuit box, providing 2.4-m flow distance and a closed-surface cross section of 100-mm width and 200-mm height, equipped with 0 and 4 rows of reinforcing bar grids with 45-mm clear spacing. The flow performance was assessed in terms of dynamic stability and passing ability. The investigated mixtures were considered as diphasic suspensions of fiber-coarse aggregate (F-A > 5 mm) in suspending mortars containing particles finer …

Mantle Dynamics Of The North China Craton: New Insights From Mantle Transition Zone Imaging Constrained By P-To-S Receiver Functions, Lin Liu, Stephen S. Gao, Kelly H. Liu, William L. Griffin, Sanzhong Li, Siyou Tong, Jieyuan Ning

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Cratons are generally defined as stable continental blocks with a strong cratonic root that typically is at least ∼200 km thick. Many cratons have undergone little internal tectonism and destruction since their formation, but some of them, such as the eastern part of the North China Craton (NCC), the Dharwar Craton and the Wyoming Craton, have lost their thick cratonic root and become reactivated in recent geological history, leading to widespread Meso-Cenozoic volcanisms. The mechanisms responsible for such decratonization remain debated. To provide new constraints on models leading to decratonization, in this study we stack 612 854 source-normalized P-to-S conversions …

Tensegrity Laboratory Drilling Rig For Earth And Space Drilling, Mining, And Exploration, Mohamed S. Khaled, Muhao Chen, Enrique Z. Losoya, Luis A. Rodriguez, Eduardo Gildin, Robert E. Skelton

Mechanical Engineering Faculty Publications

Drilling operations are increasingly becoming a manufacturing process where repeatability, versatility, and speed matter the most for an operator or future space missions. Nonetheless, the ongoing energy transition efforts will undoubtedly shape the objectives and priorities of drilling operators into new markets with unexplored technical challenges. Versatility, mobility, and automated systems will play crucial roles in determining successful applications. This study explores and introduces the application of tensegrity-based structures, commonly used in space exploration, to Earth and Space drilling systems by modeling, designing, and building a tensegrity-based miniature drilling rig. Robust models for designing a drilling rig based on tensegrity …

Evaluation Of Grit Properties At A Medium-Capacity Wastewater Treatment Plant: A Case Study, Tetiana Kolosovska, Sarah Bauer

Henry M. Rowan College of Engineering Departmental Research

The optimized, tailored approaches in the design of wastewater treatment plants (WWTPs) minimize expenditure of the resources, increase treatment effectiveness, and prolong useful life of the infrastructure. In this study, wastewater grit characteristics were evaluated over the course of one year at the headworks and collection network of the Atlantic County Utilities Authority (ACUA) WWTP, located in New Jersey, USA. The mixed grit at the ACUA WWTP can be characterized as particles prevalently in the fine sand size range with high content of organic matter, low fraction of fats, oils, and grease (FOG), and very low settling velocity. A significant …

Santa Clara Magazine, Volume 63 Number 2, Fall 2022 [Print Issue 62:2], Santa Clara University

Santa Clara Magazine

14 - AFTER THE CANNONBALL What does it mean to wrestle with your own human limitations and vulnerability as you follow the footsteps of a saint? Hung Pham, S.J.

18 - GROWING When I was little, there seemed to be this nondescript era of life, a foggy “someday,” when becoming an adult just happened. Nikhita Panjnani ’24.

20 - HOW IT STARTED, HOW IT'S GOING For decades, the internet has shaped the way we communicate, but two years of being extremely online hit fast forward on its real-world impact. Matt Morgan.

26 - NURTURING NATURE A story in two stories: …

Impulse Measurement Methods For Pulsed Laser Ablation Propulsion, Ishaan Mishra, Scott Kirkpatrick

Rose-Hulman Undergraduate Research Publications

Pulsed laser ablation propulsion has the potential to revolutionize space exploration by eliminating the requirement of a spacecraft to carry its propellant and power source as the high-power laser is situated off-board. More experimentation needs to be done to optimize this propulsion system and understand the mechanisms of thrust generation. There are many methods used to calculate the impulse imparted in pulsed laser ablation experiments. In this paper, key performance parameters are derived for some of the impulse measurement methods used in ablation propulsion experiments. Regimes discussed include the torsional pendulum system, simple pendulum system, and solid and liquid microspheres.

The Lumpkin Letter (Fall 2022), Lumpkin College Of Business & Technology

Lumpkin College of Business & Technology Newsletters

No abstract provided.

Reinforcement Of The Plasmon–Phonon Coupling In Α-Quartz Via Deposition Of Gold Nanoparticles In Etched Ion Tracks, Maria C. Garcia Toro, Miguel L. Crespillo, Jose Olivares, Joseph T. Graham

Nuclear Engineering and Radiation Science Faculty Research & Creative Works

This study reports a large reinforcement of the plasmon–phonon coupling in alpha quartz achieved through the controlled deposition of gold nanoparticles into nano templates produced through chemical etching of ion tracks. Preferential agglomeration of nanoparticles within the etched ion tracks (nano wells) was observed in Scanning Electron Microscopy and Atomic Force Microscopy images. Raman characterization of quartz substrates with different nanoparticle concentrations revealed a relationship between the plasmon–phonon coupling intensity and nanoparticle concentration. Reinforcement of the plasmon–phonon coupling was observed as an increase in the Raman intensity with increasing concentration of deposited nanoparticles. The intensity initially increased linearly with nanoparticle …

The Rock 2022, School Of Engineering And Computer Science

The Rock

No abstract provided.

Atomic And Molecular Layer Deposition As Surface Engineering Techniques For Emerging Alkali Metal Rechargeable Batteries, Matthew Sullivan, Peng Tang, Xiangbo Meng

Mechanical Engineering Faculty Publications and Presentations

Alkali metals (lithium, sodium, and potassium) are promising as anodes in emerging rechargeable batteries, ascribed to their high capacity or abundance. Two commonly experienced issues, however, have hindered them from commercialization: the dendritic growth of alkali metals during plating and the formation of solid electrolyte interphase due to contact with liquid electrolytes. Many technical strategies have been developed for addressing these two issues in the past decades. Among them, atomic and molecular layer deposition (ALD and MLD) have been drawing more and more efforts, owing to a series of their unique capabilities. ALD and MLD enable a variety of inorganic, …

Serpentine Micromixers Using Extensional Mixing Elements, George Tomaras, Chandrasekhar R. Kothapalli, Petru S. Fodor

Physics Faculty Publications

Computational fluid dynamics modeling was used to characterize the effect of the integration of constrictions defined by the vertices of hyperbolas on the flow structure in microfluidic serpentine channels. In the new topology, the Dean flows characteristic of the pressure-driven fluid motion along curved channels are combined with elongational flows and asymmetric longitudinal eddies that develop in the constriction region. The resulting complex flow structure is characterized by folding and stretching of the fluid volumes, which can promote enhanced mixing. Optimization of the geometrical parameters defining the constriction region allows for the development of an efficient micromixer topology that shows …

Columnas: The Honors Program Newsletter At Bentley University, Debayan Sen, Hailey Jennato, Gabe Holmes, Daniel Furze

Honors Program

Page 1: SOCIAL MEDIA—A VEHICLE FOR SOCIAL CHANGE OR VIRTUE SIGNALING? ~ By Debayan Sen ’23

Page 2: WILL ARTIFICIAL INTELLIGENCE AND ROBOTICS REPLACE THE HUMAN WORKER? ~ By Hailey Jennato ’24

Page 3: HOW TO HEALTHILY COMMUNICATE IN A RELATIONSHIP: NO, NOT JUST A ROMANTIC ONE ~ By Gabe Holmes ’26

Page 4: THE W SLANT ~ By Daniel Furze ’26