Engineering Commons^™

Presence Of Atheromatous Plaques And Theirs Effects On The Blood Flow, Belhocine Mostefa Bm, Amrani Hichem Ah, Fedaoui Kamel Dr, Mazouz Hammoudi Mh

Emirates Journal for Engineering Research

The paper utilizes a finite element method to study both the blood flow and atheromatous plaques. Specifically, the COMSOL finite element package is employed to achieve a fluid model. COMSOL is a powerful finite element tool commonly used in various research and industrial domains to study multiphysics problems. The focus of the investigation is on the geometric aspects of the atheromatous plaques. The study considers different forms and arrangements of stenosis, taking into account the irregularities formed by various shapes of the plaques and the resulting flow patterns. The key findings of the research suggest that the pressure and velocity …

Environmental Drivers Impact The Accumulation And Diversity Of Antibiotic Resistance In Green Stormwater Infrastructure, Kassidy N. O'Malley, Patrick J. Mcnamara, Christopher Marshall, Emily Lou Lamartina, Thuy Duyen Lam, Numair Ali, Walter M. Mcdonald

Civil and Environmental Engineering Faculty Research and Publications

Antibiotic resistance poses an urgent public health concern, with the environment playing a crucial role in the development and dissemination of resistant bacteria. There is a growing body of research indicating that stormwater is a significant source and transport vector of resistance elements. This research sought to characterize the role of green stormwater infrastructure (GSI), designed for stormwater infiltration, in accumulating and propagating antibiotic resistance in the urban water cycle. Sampling included 24 full-scale GSI systems representing three distinct types of GSI - bioswales, bioretention cells, and constructed wetlands. The results indicated that GSI soils accumulate antibiotic resistance genes (ARGs) …

Enhancing Curcumin’S Therapeutic Potential In Cancer Treatment Through Ultrasound Mediated Liposomal Delivery, Remya Radha, Vinod Paul, Shabana Anjum, Ayache Bouakaz, William G. Pitt, Ghaleb A. Husseini

Faculty Publications

Improving the efficacy of chemotherapy remains a key challenge in cancer treatment, considering the low bioavailability, high cytotoxicity, and undesirable side effects of some clinical drugs. Targeted delivery and sustained release of therapeutic drugs to cancer cells can reduce the whole-body cytotoxicity of the agent and deliver a safe localized treatment to the patient. There is growing interest in herbal drugs, such as curcumin, which is highly noted as a promising anti-tumor drug, considering its wide range of bioactivities and therapeutic properties against various tumors. Conversely, the clinical efficacy of curcumin is limited because of poor oral bioavailability, low water …

Using Unmanned Aircraft System (Uas)-Borne High-Resolution Hyperspectral Imaging And Gamma Radiometry For Rare Earth Element Exploration In The Bearpaw Mountains, Montana Usa, Emma Kamp

Graduate Theses & Non-Theses

The radiometric signature of thorium, in combination with the hyperspectral signature of carbonate minerals, can be a useful indicator of rare earth mineral occurrences in air-borne geophysical exploration. Recent technological advancements have allowed unmanned aircraft system (UAS)--borne spectral imaging and gamma-ray spectroscopy systems to acquire high-spatial-resolution data. In this study, we attempted to define and map an area of interest for rare earth mineral exploration using UAS-borne spectral and gamma-ray spectroscopy systems. Gamma-ray spectroscopy data were used to define an area of interest. Short-wave infrared imagery was used to detect and map carbonate minerals within the area of interest. Gamma-ray …

Variable Scale Pore System Effects On Unconventional Reservoir Fluid Properties And Production Mechanisms, David Reichhardt

Graduate Theses & Non-Theses

Improved recovery from tight oil reservoirs will be accomplished through a more thorough understanding of primary and enhanced production mechanisms. This is true for both primary production and production following cyclic gas injection processes. The production mechanisms are controlled by reservoir fluid properties and pore network characteristics. The pore networks found in these reservoirs include large fractions of nanometer scale pores, which effect fluid flow and storage. A numerical model was developed to describe the impacts that nanometer scale pore networks have on the fluid properties and oil production. In order to describe the effects, the nanometer scale pore networks …

Selective Separation Of Metal Ions From Aqueous Process Streams Using Magnetite Adsorbent, Daniel Geottlich

Graduate Theses & Non-Theses

The effect of coexisting ions on the selectivity of adsorption onto magnetite nanoparticles (MNPs) for various elements in aqueous solutions was investigated. Surrogate solutions of varying concentrations of rare earth elements (REEs), heavy metals, and gangue elements (low commercial value elements or metals) were mixed with MNPs. Selectivity experiments were performed on surrogate samples based on the composition of a REE ore concentrate and a leach liquor from the chlorinated products of the roasted REE ore concentrate. Adsorption efficiency of magnetite was determined by measuring ion concentration in a sample using inductively coupled plasma-optical emission spectroscopy (ICP-OES). Magnetite is selective …

Comparison Of All-In Sustaining Costs, Gold Grade, And Gold Prices In North American Gold Mining Companies, David Abiodun

Graduate Theses & Non-Theses

Mining has evolved into an equilibrium of ore deposit management, environmental stewardship, and economic profitability that necessitates a proper understanding of economics and production efficiency. The All-In Sustaining Cost (AISC) was introduced in 2013 to better capture the cost of producing one ounce of gold and, when compared with the gold price and grade, could describe a company’s gold production efficiency. In this paper, this novel analysis focuses on US and Canadian operations under Barrick and Newmont, the two largest gold mining companies in North America, from 2019-2022. Published data for Coeur and Kinross were also secondarily analyzed. Under Newmont …

Mpem Capstone Presentation, Jason Schneider

Graduate Theses & Non-Theses

Master of Project, Engineering and Management (MPEM) Final Capstone Presentation.

Mpem Capstone Presentation, Kaelin Newman

Graduate Theses & Non-Theses

Master of Project, Engineering and Management (MPEM) capstone final presentation.

Mpem Capstone Presentation, Sarah Hambidge

Graduate Theses & Non-Theses

Master of Project, Engineering and Management (MPEM) Final Capstone Presentation.

Mpem Capstone Presentation, Stetson Ratzlaff

Graduate Theses & Non-Theses

Master of Project, Engineering and Management. MPEM Capstone Final Presentation.

Electrical Resistance Tomography Measurements In Column Flotation Of Pure Hydrophobic And Hydrophilic Systems, Vimeipha Vilayphone

Graduate Theses & Non-Theses

Column flotation was phenomenologically investigated with Electrical Resistance Tomography (ERT) as an uninterrupted instrument to measure gas holdup. Two-phase tests were performed to use the measurements for examining gas dispersion. Results were found to duplicate the findings in a previous thesis. With confidence attained in experimental procedures, three-phase tests were then performed to compare gas holdup with hydrophobic and hydrophilic solids. Hydrophobic solids included talc as well as dolomite with dodecyl amine (DDA) collector. Hydrophilic solids included dolomite as well as talc with carboxymethyl cellulose (CMC) depressant. Variables throughout the research included frother concentration and sparger size. Results showed gas …

Process Intensification For Rare Earth Elements Adsorption By Resonant Vibratory Mixing, Oluwatosin Adebayo, Richard Ladouceur, Zainab Nasrullah

Graduate Theses & Non-Theses

The adsorption capacity for six rare earth elements (Lanthanum, Terbium, Neodymium, Dysprosium, Praseodymium, and Holmium) by biochar produced from hemp feedstock was investigated. An innovative approach to enhancing the adsorption of rare earth elements using biochar was studied and investigates the potential of resonant vibratory mixing (RVM) as a process intensification method compared to conventional mechanical mixing for the adsorption process. Hemp hurds as source of biomass was pyrolyzed to produce biochar at a temperature of 4500C for 60 minutes. The biochar was characterized by FTIR (Fourier Transform Infra-red), SEM (Scanning Electron Microscopy), Surpass 3 Electrokinetic solid surface analyzer, and …

Application Of Biochar / Bentonite Based Admixtures In Reinforced Concrete For Corrosion Prevention, Jacob Fleury

Graduate Theses & Non-Theses

Reinforced concrete systems are in many sectors of infrastructure. Due to a combination of elevated compressive strength from the cement and aggregates and tensile strength from the reinforcing steel, reinforced systems are favorable in construction applications where high strength is desired. However, while reinforced concrete is in service, it can be introduced to contaminants that cause corrosion. Contaminants can leach through the porous matrix of the concrete structure and influence initiation of corrosion products on reinforcement. Corrosion is the primary cause for advanced deterioration of concrete structures. Concrete deterioration has promoted research efforts for the protection of future systems. This …

Enhancement Of The Mechanical Behavior Of Nitinol Wire For Vascular Stent Applications By The Addition Of A Polymer Matrix Composite Coating, Baylie Phillips

Graduate Theses & Non-Theses

Several clinical studies since 2008 have reported stent failure through mechanical means from inadequate strength, fatigue failure, coating failure via delamination and cracking, and pathological failures. Enhancement of the mechanical performance and stability of the polymer coating has the potential to minimize coating failure, aiding in the prevention of the other failure modes. The present study fabricated a polymer matrix composite coating from poly(D,L-lactide-co-glycolic) acid (PLGA) and hydroxyapatite (HA) nanoparticles on nitinol wires. Five weight fractions of HA (1.0, 2.5, 5.0, 7.5, and 10.0 wt.% HA) were studied for their influence on the mechanical performance of nitinol. The coatings were …

Characterizing And Modeling The Hydraulic Regime Of The Upper Missouri River, Koby Martin

Graduate Theses & Non-Theses

Modeling river behavior in software is essential to increase the lifetime of hydraulic structures, while protecting surrounding communities from flood and ice jam events. This research focuses on defining a novel methodology to collect and analyze river discharge, geometry, and landcover data, providing rural communities with a method of modeling river behavior. This includes the collection of critical river information that is not available to the public, and the process for surveying or interpolating geometric constraints. The methodology for modeling rivers in software shows strong correlation with historical data, capturing the full geometry of the river and those structures that …

Enabling On-Device Learning Through Hybrid Edge Computing Frameworks, Md Sharif Ahmed

Electrical Engineering Theses

In recent advancement of technology implementing Machine Learning (ML) algorithms with edge devices has gained remarkable popularity. Enabling Machine Learning (ML) in the edge opened new hybrid branch where edge hardware meets with Machine Learning (ML). Day by day devices are becoming more powerful and capable of doing a lot of computation. These powerful computational capabilities created the way of implementing Machine Learning (ML) on small edge devices. There are diverse ways we can implement machine learning models to the edge. For any embedded prototype, implementation of Tiny Machine Learning (TinyML) is making the IoT (Internet of Things) devices intelligent …

Analyzing Heat Generated From Electro-Osmotic Flow Utilizing Computational Fluid Dynamics, Jordan Elizabeth Grothe

Honors Thesis

Without extensive vascularization, the transfer of fluid and nutrients through human tissue is limited to diffusion and weak interstitial flow. Electroosmosis, or the flow of fluid driven by an electrical field, has become a promising solution. Scientists have begun applying electricity to human tissue to promote stronger interstitial flow; however, optimization of this process has proven to be a challenge due to ohmic heating. Cells function within a small range of temperatures and exposure to voltages exceeding the threshold will cause cells to degrade and die prematurely. This research seeks to better understand and quantify the range of voltage where …

Investigating The Impact Of Secondary Activation Time On The Adsorption Properties Of Activated Biochar For Arsenic Removal From Wastewater, Achyuth Bharadwaj Rayarao

Graduate Theses and Dissertations (2019 - present)

Biochar, a naturally occurring and renewable carbon material, becomes porous through activation. Activated biochar is an ideal candidate for use as an adsorbent. The objective of this study is to investigate whether activated biochar derived from Colorado soft pine serves as a better adsorbent and demonstrates enhanced adsorption capabilities after undergoing secondary physical activation at various activation times. The effect of secondary action time on physical adsorption properties drawn from the analysis of isotherm plots, surface areas and pore size patterns were examined by using a physisorption analyzer. Chemical structures were identified using both ultimate and proximate analyses, while porosity …

Synthesis Of Acetylene Diols With The Participation Of The Bu4noh/Dmso/H2o Catalytic Systems, Muyassar K. Salieva, Odiljon E. Ziyadullayev, Guzal K. Otamukhamedova, Rifkat F. Talipov, Lochin K. Ablakulov

CHEMISTRY AND CHEMICAL ENGINEERING

The purpose of this work in this study, acetylene alcohols containing heteroatomic substituents in their molecular composition- 2-(-thiophen-2-yl)but-3-yn-2-ol, 2-(3-methylthiophen-2-yl)but-3-yn-2-ol, 2-(furan-2-yl)but-3yn-2-ol, 2-(pyridin-4-yl)but-3-yn-2-ol, 2-(5-chlorothiophen-2-yl)but-3-yn-2-ol, 2-(5-bromothiophen-2yl)but-3-yn-2-ol acetylene diols were synthesized based on the reaction with acetone in a dimethyl sulfoxide solvent in the presence of the Bu₄NOH/DMSO/H₂O catalytic system. The influence of the molar ratio of starting materials, reaction duration, temperature, nature of the catalyst and solvents on the product yield was systematically studied. The composition, purity and structure of the new generation of synthesized acetylenediols have been confirmed by modern physicochemical methods. The mechanism of the reaction process …

Synthesis Of High Molecular Mass Resins Based On Furfuryl Alcohol, Boysayid U. Sayidov, Latif E. Jumanov, Muzaffar G. Alimukhamedov, Sherali A. Umarov, Farhod A. Magrupov

CHEMISTRY AND CHEMICAL ENGINEERING

The purpose of the work is to study the process of synthesis of furfuryl oligomers with high molecular weight at various ratios of furfuryl alcohol and hydroxyl-containing polyether polyol. The influence of the process method on the yield of high-molecular furfuryl oligomer is shown - with a one-step synthesis method with an increase in the amount of furfuryl alcohol from 20 to 50 moles per 1 mole of polyether polyol, the yield of the final product decreases from 75% to 56%, apparently due to high exothermic effects, causing gelation systems. In contrast to the one-time introduction of the catalyst, its …

Synthesis And Technology Of Vinyl Esters Of Aromatic Carboxylic Acids Based On Vinyl Acetate, Askar B. Parmanov, Suvonkul E. Nurmanov, Saida S. Abdurakhmanova, Sarvinoz I. Tirkasheva, Begzod F. Adashev

CHEMISTRY AND CHEMICAL ENGINEERING

In this work the vinylation reactions of aromatic carboxylic acids with vinyl acetate, which contain various substituents, in the presence of 2-chloro-4,6-dimethoxy-1,3,5-triazine were studied for the first time. The influence of the nature of the starting materials, temperature, reaction duration, solvent and reagents - zinc triflate (Zn(OTf)₂, 3,3-diphenylbinaphthol (3,3'-Ph₂BINOL-2Li), tertiary potassium butylate (KO^trBu), butyllithium (BuLi) for the synthesis of vinyl esters. The synthesis of vinyl esters of aromatic carboxylic acids was carried out: benzoiс, 2-phenylacetic, 4-methylbenzoic, 4-methoxybenzoic, 3,4-dimethoxybenzoic, 2-brombenzoic, 4-brombenzoic, 4-fluorobenzoic, 3-nitrobenzoic, 4-nitrobenzoic, 4-tertiary butylbenzoic, 2-chlorobenzoic, 4-chlorobenzoic, 3-hydroxybenzoic and 4-hydroxybenzoic acids has been studied. …

Synthesis Of Internal Acetylene Alcohols Based On The Sonogashira Reaction Of Terminal Acetylene Alcohols And Benzolchloride, Guzal K. Otamukhamedova, Odiljon E. Ziyadullayev, Abduvahob Ikramov, Sarvinoz I. Tirkasheva

CHEMISTRY AND CHEMICAL ENGINEERING

The purpose of the study is to develop a new catalytic system for the synthesis of internal acetylene alcohols from the Sonogastric coupling reaction of terminal acetylene alcohols and benzolchloride. For the first time in this work, internal acetylene alcohols have been synthesized based on reactions of some terminal acetylene alcohols – 3,4-dimethylpentin-1-ol-3, 3,4,4-trimethylpentin-1-ol-3, 1-ethynylcyclohexanol-1, 2-ethynyladamantanol-2, 2-phenylbutin-3-ol-2, 2-(naphthyl-2)butyn-3-ol-2, 2-(furanyl-2)butyn-3-ol-2 and 2-(pyridinyl-4)butyn-3-ol-2 with chloridebenzene. In order to achieve high product productivity in the Sonogashira reaction, alternative conditions have been identified by studying the molar ratios, spatial structure, induction effects of substituents, solvent and catalyst nature, as well as temperature, reaction duration …

Study Of The Influence Of B2o3 Oxide On The Physical And Technical Properties Of Ground Enamel Obtained Based On Local Raw Material Components, Shoxrux B. Naimov, Mastura Kh. Aripova

CHEMISTRY AND CHEMICAL ENGINEERING

The purpose of the study was to obtain ground enamel based on local raw materials and to study the effect of boron oxide. The selection of local raw materials for producing ground enamel showed that the resulting glass compositions are in the SiO₂–Al₂O₃–Na₂O–K₂O–CaO–B₂O₃ system. To adjust the properties, additives of nickel oxide and cobalt oxide were used. The properties of the developed compositions of primer enamels meet the requirements of GOST 24405-80. It has been determined that the addition of boron and an increase in its amount …

Formation Of Luminescent Coatings With The Use Of Low Melting Glass, Eygeniy N. Poddenezhny, Ekaterina E. Trusova, Andrei A. Boiko, Ekaterina R. Kravcova, Olga V. Davydova

CHEMISTRY AND CHEMICAL ENGINEERING

The aim of the present research is to develop compounds and technologies for applying the luminous vitrocrystalline compounds to smooth and ribbed glass substrates in LED lamp structure with a remote photoconverter that contains oxide low melting glass as the base and nanostructured cerium–doped yttrium–aluminum garnet powder as the luminophore. The luminescent coatings based on nanostructured cerium doped yttrium-aluminum garnet powder and low melting glass of composition BaO-Bi₂O₃-B₂O₃-K₂O-SiO₂ where prepared. YAG:Ce³⁺ powder was synthesized by the method of thermochemical reaction. Silica glass powder was introduced into the composition …

Anomalous Of Resistance And Magnetic Susceptibility At 280-310 K And Ambient Pressure In Bismuth Cuprates Synthesized By Solar Energy, Dilbara Dj. Gulamova, Elyor B. Eshonkulov, Valeriya R. Li, Grigor I. Mamniashvili, Timur I. Gulamov

CHEMISTRY AND CHEMICAL ENGINEERING

In order to obtain the full content of high-temperature superconducting phases using the “Super Fast Alloys Quenching” technology in the Large Solar Furnace (Parkent), precursors of bismuth cuprates of the series Bi_1,7Pb_0,3Sr₂Ca_(n-1)Cu_nO_y, n=3-30 were synthesized. Methods for study the properties of precursors are presented. The oriented nano-sized microstructure and layered structure of nanocrystalline nuclei are shown. The phase composition of the precursors at the beginning of the series (n=3-5) is represented by X-ray amorphous and crystalline phases. An increase in the content of CaO and CuO destabilizes the …

Waste Utilization In Korean Cement Plants, Geun-Seong Lee, Zebo Abdullaevna Babakhanova, Mastura Khikmatovna Aripova

CHEMISTRY AND CHEMICAL ENGINEERING

The kiln process in cement plant has the advantage of completely and effectively destroying and burning all organic substances due to high temperature and long residence time, oxygen atmosphere and excellent mixing effect, alkaline conditions of raw materials, and incorporation of trace metals into clinker, and plays a role as a pollutant emission barrier during waste utilization. Waste utilization technology is now proven and successful in cement plants. The waste utilization in Korean cement plants are greatly expanding in the view of energy and material recoveries, and economics as well as environmental preservation. Research on waste utilization in the Korean …

Improvement Of The Seismic Safety System For The Population And Territory Of The Republic Of Uzbekistan, Muslima Аbdurakhimkho‘Jayeva, Oyqiz Yokubjonova, Oydin Khasanova Docent

Technical science and innovation

Central Asian seismologists show high magnitudes of potential future earthquakes (8 and higher), which corresponds to a probable level of macroseismic intensity of 9 or more points. Considering that zones with a high level of seismic hazard coincide with densely populated areas, as well as taking into account the seismic vulnerability of existing buildings, it can be stated that in Each existing level of seismic risk is very high and the consequences of future earthquakes can be catastrophic.

In recent years, large-scale comprehensive measures have been implemented in the Republic of Uzbekistan to develop the fields of seismology, ensure earthquake …

Analysis And Evaluation Of Different Transformer Architectures For The Protein Sequence Representation And The Corresponding Hypothetical Applications, Mary Mao

Theses and Dissertations

This project is to investigate and assess several Transformer topologies for the modeling of protein sequences and their corresponding uses. Each major model for the protein sequence representations is inspected with its mathematical theory and analyzed for the different performance of the models with various validation repositories.

Rgb Root Matriz Color Dance, Danielle E. Gauthier

Theses and Dissertations

RGB Root Matriz Color Dance (Color Dance) is an immersive, interactive experience that combines poetic phrases and color filters to create a womb-like environment. Designed by Danielle Gauthier, this artistic piece uses a webcam to respond to users’ movements in real time, allowing them to confront and express their emotions through metaphor and dance. Color Dance creates a unique platform for self-discovery and empowerment by fostering a connection between the body and discomforting emotions.