Engineering Commons^™

Mathematical Modeling And Pointwise Validation Of A Spouted Bed Using An Enhanced Bed Elasticity Approach, Sebastián Uribe, Binbin Qi, Omar Farid, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

With a Euler-Euler (E2P) approach, a mathematical model for predicting the pointwise hydrodynamic behavior of a spouted bed was implemented though computational fluid dynamics (CFD) techniques. The model considered a bed elasticity approach in order to reduce the number of required sub-models to provide closure for the solids stress strain-tensor. However, no modulus of elasticity sub-model for a bed elasticity approach has been developed for spouted beds, and thus, large deviations in the predictions are obtained with common sub-models reported in literature. To overcome such a limitation, a new modulus of elasticity based on a sensitivity analysis was developed and …

A Study On The Performance Of University Malaya Campus Bus Service Using Dwell Time Model And Passenger Distribution Analysis, Gan Jia Jun

Student Works (2020-2029)

Accessibility and mobility are key to a sustainable transport system for the community within a green university campus. To encourage more sustainable transport usage, public transport such as campus bus service are provided for students to commute between academic buildings and residential areas on campus. The current operating timetable of the campus bus service is made by the Student Affairs Division based on the observation of bus service in the past few years. This research aimed to study the capability of the campus bus service in University of Malaya (UM) to accommodate the demand of students. A survey questionnaire was …

Synthesis And Characterization Of Silver Nanoparticles In Lamellar Lyotropic Liquid Crystal, Siti Mariah Mohd Yasin

Student Works (2020-2029)

Lamellar lyotropic liquid crystal-silver nanoparticles (LLLC-AgNPs) are synthesized using the in-situ method. The polarizer microscope showed a mosaic-like pattern with fan shape textures. The high resolution transmission electron microscope (HRTEM) confirmed that the AgNPs are spherical in shape with 4 – 12 nm size. Differential scanning calorimetry (DSC) determined the LLLC-AgNPs transition anisotropic phase to the highly ordered isotropic phase at 300 °C, and crystallinity was completed at 350 °C. Thermogravimetric analysis (TGA) verified that the LLLC-AgNPs were completely decomposed at 700 °C. Ultra-violet visible spectroscopy (UV-vis) found the absorption peaks at around 400 nm and proved that the AgNPs …

Impacts Of Compaction Load And Procedure On Stress-Deformation Behaviors Of A Soil Geosynthetic Composite (Sgc) Mass—A Case Study, Meenwah Gui, Truc Phan, Thang Pham

Civil Engineering Faculty Publications

Fill compaction in the construction of Geosynthetic Reinforced Soil (GRS) mass is typically performed by operating a vibratory or roller compactor, which in turns imposed a compaction load in direction perpendicular to the wall face. The compaction process resulted in the development of the so-called compaction-induced stress (CIS), which may subsequently increase the stiffness and strength of the fill material. Compaction process is normally simulated using one of the following compaction procedures—(i) a uniformly distributed load acting on the top surface of each soil lift, (ii) a uniformly distributed load acting on the top and bottom surface of each soil …

Optimizing Membrane Distillation With Solar Thermal Collectors, Andrew Mason, Ben Shulders, Siamak Nejati

UCARE: Research Products

With rising human populations, the demand for freshwater is an ever-growing problem. One emerging technology to combat this problem is membrane distillation (MD). MD has several advantages for water desalination including 100% rejection of solute (salt, heavy metals, etc.) and mergeability with other affordable energy sources (solar heat, electric resistance, etc.) However, at the moment the specific energy consumption (SEC) of MD is very high due to low water production rates and large energy inputs to heat water. In a solar‐assisted design for MD, the high cost of solar collectors (~$200/m2) inhibits the low cost of water production in comparison …

Engineering Tutoring Center Offers In-Person And Virtual Help, Usu College Of Engineering

College of Engineering News

Sept. 10, 2020 — The Engineering Tutor Center is adapting to changing times and offering both face-to-face and virtual tutoring sessions. Tutoring services are free to students, and there is no need to schedule an appointment for remote or in-person tutoring. The center is located in Anderson Engineering 320.

Personalized Medicine: The Use Of Biomarkers And Molecularly Targeted Therapies For Patient Care And Cancer Intervention, Wafa Asad, Emily Schmitt Lavin

Mako: NSU Undergraduate Student Journal

Personalized medicine and targeted therapy have been emerging fields of study for the remediation and inhibition of cancer. Personalized medicine in the treatment of cancer involves using genetic, immune, and proteomic profiling to provide therapeutic options as well as prognostic background for every patient and their tumor’s genetic mutations. Targeted therapies allow researchers and medical personnel alike to determine the appropriate treatment for a patient based on the molecular basis and mechanistic actions of a cancerous tumor. The overall significance of this study was to express how these treatments use biomarkers to pinpoint the location, and severity of the cancer, …

Thermodynamic Functions Of Silumin Ak12m2, H.M. Nazarov, Okil Osimi, Ganiev I.N.

Gorniy vestnik Uzbekistana

The article presents the results of studying the thermodynamic functions of silumin grade AK12M2. The temperature and cooling time dependences obtained during the experiment are described by the equations that are necessary for calculating the cooling rate of alloys. It is shown that as enthalpy increases, enthalpy, entropy, specific heat and heat transfer coefficient of alloy AK12M2 increase, and Gibbs energy decreases

Improvement Of Stock Opening Diagram Of Uranium Deposits When Involving In Processing By Method Underground Leaching, Alikulov Sh.Sh., Akhadov Kh.R., Xalimov L.U.

Gorniy vestnik Uzbekistana

Uranium deposits of the Kyzylkum region, related to deposits of reservoir-infiltration or “sandstone” type and developed by the PV method, are formed mainly due to the occurrence of exogenous-epigenic processes in permeable rocks of the sedimentary cover. Research in practice shows that between the exploration characteristics often changes in the geometry of the ore body in the absence of confirmation of linear reserves. Therefore, use the present methodology to clarify the random errors of the parameters between exploration and industrial, to extract products from the bowels as much as possible and without loss. After clarification and justification of all necessary …

Study Of Gold Encapsulation In Maghemite During Microwave Roasting Of Flotation Concentrate, K. Sanakulov, O.U. Fuzaylov

Gorniy vestnik Uzbekistana

The article presents the results of a study of the encapsulation of gold in maghemite during microwave processing of refractory gold-bearing concentrate. The magnetic separation of the MW calcine showed the concentration of gold in the magnetic fraction. The results of XRD analysis confirmed the high content of maghemite in the magnetic fraction. An obvious correlation was found between gold and maghemite, since most of the gold recovered in the magnetic fraction where the maghemite content is 48.7%. Sulfuric acid leaching of the magnetic fraction in order to dissolve iron oxides made it possible to increase the rate of gold …

Inclusions In Granodiorites Of The Auminzinsky Intrusion (Central Kyzylkum), Amirov E.M.

Gorniy vestnik Uzbekistana

Based on a study of the composition, petro- and geochemical features of the inclusions and hostgranitoid rocks of the Auminzatau mountains, their identity was established and a conclusion was drawn on the correspondence of melonratic fragments to the earlier phase of the earlier phase of the granitoid complex under consideration, reflecting the nature of the gravitational differentiation of a single magma chamber, which formed these varieties of intrusive formations

Extraction Purification Of Concentrates Of Rare Earth Elements From Impurities And Natural Radionuclides, O.F. Petuhov, B.T. Ruziev, U.Z. Sharafutdinov

Gorniy vestnik Uzbekistana

The article presents the results of experimental studies on the extraction of rare-earth element concentrates from impurities and natural radionuclides. As part of the research, a technology for cleaning concentrates has been developed, including the following operations: Experimental studies have shown the possibility of effective purification of rare-earth element concentrates from impurities and natural radionuclides by the extraction method.

Extraction Of Iron From Acid Waste Solutions Of The Process Of Bioxidation Of Sulfide Gold-Containing Concentrates, Sanakulov U.K., Tazhibaev D.Yu., Ergashev Ulugbek Abdurasulovich

Gorniy vestnik Uzbekistana

The article presents the results of laboratory studies on the extraction of iron from acidic waste solutions of the process of bacterial leaching of sulfide gold-bearing concentrates. The aim of this work is to extract iron from technogenic arsenic-containing acidic wastes, to increase the efficiency of using mineral raw materials with obtaining additional products. The studies were carried out on a solution taken from the biooxidation unit of the NMMC. The main task of this work was to determine the optimal parameters for the processing of acid waste solutions and the separation of iron from the solution without arsenic impurities. …

Prospects For Attracting Foreign Investment For The Development Of Non-Metallic Minerals In The Complex On The Example Of The "Vaush" Deposit, Mirzaev B.A., Sharipov Sh.F., Istablaev F.F.

Gorniy vestnik Uzbekistana

This article provides information about the Dolomites, bentonite clays and quartz Sands of The vaush Deposit located in the Navoi region. The analysis of physical and chemical properties and composition of natural mineral raw materials is carried out. The prospects of developing the “VAUSH” field are proved.

Heterogenous Trip Distance-Based Route Choice Behavior Analysis Using Real-World Large-Scale Taxi Trajectory Data, Yajuan Deng, Meiye Li, Qing Tang, Renjie He, Xianbiao Hu

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Most early research on route choice behavior analysis relied on the data collected from the stated preference survey or through small-scale experiments. This manuscript focused on the understanding of commuters' route choice behavior based on the massive amount of trajectory data collected from occupied taxicabs. The underlying assumption was that travel behavior of occupied taxi drivers can be considered as no different than the well-experienced commuters. To this end, the DBSCAN algorithm and Akaike information criterion (AIC) were first used to classify trips into different categories based on the trip length. Next, a total of 9 explanatory variables were defined …

Real-Time Road Hazard Information System, Carlos Pena-Caballero, Dong-Chul Kim, Adolfo Gonzalez, Osvaldo Castellanos, Angel A. Cantu, Jungseok Ho

Computer Science Faculty Publications

Infrastructure is a significant factor in economic growth for systems of government. In order to increase economic productivity, maintaining infrastructure quality is essential. One of the elements of infrastructure is roads. Roads are means which help local and national economies be more productive. Furthermore, road damage such as potholes, debris, or cracks is the cause of many on-road accidents that have cost the lives of many drivers. In this paper, we propose a system that uses Convolutional Neural Networks to detect road degradations without data pre-processing. We utilize the state-of-the-art object detection algorithm, YOLO detector for the system. First, we …

Machine Intelligence For Nerve Conduit Design And Production, Caleb E. Stewart, Chin Fung Kelvin Kan, Brody R. Stewart, Henry W. Sanicola Iii, Jangwook P. Jung, Olawale A. R. Sulaiman, Dadong Wang

Faculty Publications

Nerve guidance conduits (NGCs) have emerged from recent advances within tissue engineering as a promising alternative to autografts for peripheral nerve repair. NGCs are tubular structures with engineered biomaterials, which guide axonal regeneration from the injured proximal nerve to the distal stump. NGC design can synergistically combine multiple properties to enhance proliferation of stem and neuronal cells, improve nerve migration, attenuate inflammation and reduce scar tissue formation. The aim of most laboratories fabricating NGCs is the development of an automated process that incorporates patient-specific features and complex tissue blueprints (e.g. neurovascular conduit) that serve as the basis for more complicated …

Environmental Investigation Of Bio-Modification Of Steel Slag Through Microbially Induced Carbonate Precipitation, Junke Zhang, Peidong Su, Yadong Li, Lin Li

Civil and Architectural Engineering Faculty Research

Steel slag (SS) is one of byproduct of steel manufacture industry. The environmental concerns of SS may limit their re-use in different applications. The goal of this study was to investigate the leaching behavior of metals from SS before and after treated by microbially induced carbonate precipitation (MICP). Toxicity characteristic leaching procedure, synthetic precipitation leaching procedure and water leaching tests were performed to evaluate the leaching behavior of major elements (Fe, Mg and Ca) and trace elements (Ba, Cu and Mn) in three scenarios. The concentrations of leaching metals increased with the content of SS. After it reached the peak …

First-Order Comprehensive Adjoint Method For Computing Operator-Valued Response Sensitivities To Imprecisely Known Parameters, Internal Interfaces And Boundaries Of Coupled Nonlinear Systems: Ii. Application To A Nuclear Reactor Heat Removal Benchmark, Dan Gabriel Cacuci

Faculty Publications

This work illustrates the application of a comprehensive first-order adjoint sensitivity analysis methodology (1st-CASAM) to a heat conduction and convection analytical benchmark problem which simulates heat removal from a nuclear reactor fuel rod. This analytical benchmark problem can be used to verify the accuracy of numerical solutions provided by software modeling heat transport and fluid flow systems. This illustrative heat transport benchmark shows that collocation methods require one adjoint computation for every collocation point while spectral expansion methods require one adjoint computation for each cardinal function appearing in the respective expansion when recursion relations cannot be developed between the corresponding …

Decentralized Renewable Hybrid Mini-Grids For Rural Communities: Culmination Of The Irep Framework And Scale Up To Urban Communities, Blessing Ugwoke, Adedoyin Adeleke, Stefano P. Corgnati, Joshua M. Pearce, Pierluigi Leone

Michigan Tech Publications, Part 1

The Integrated Rural Energy Planning (IREP) framework offers a unified road map for locating, planning and operating decentralized renewable hybrid off-grid energy systems for localized (rural) applications in low-income countries. This paper presents the culmination of the IREP framework and aims to illustrate the final step of the IREP framework for two communities in Nigeria. It is focused on two aspects. Firstly, the techno-economic modeling (investment and operation optimization) of a hybrid mini-grid system using HOMER Pro, a techno-economic evaluation tool; and evaluating the benefits of demand side management (DSM) based on energy efficiency on the overall system economics using …

A Statistical Impulse Response Model Based On Empirical Characterization Of Wireless Underground Channel, Abdul Salam, Mehmet C. Vuran, Suat Irmak

Faculty Publications

Wireless underground sensor networks (WUSNs) are becoming ubiquitous in many areas. The design of robust systems requires extensive understanding of the underground (UG) channel characteristics. In this paper, an UG channel impulse response is modeled and validated via extensive experiments in indoor and field testbed settings. The three distinct types of soils are selected with sand and clay contents ranging from $13\%$ to $86\%$ and $3\%$ to $32\%$, respectively. The impacts of changes in soil texture and soil moisture are investigated with more than $1,200$ measurements in a novel UG testbed that allows flexibility in soil moisture control. Moreover, the …

Development Of An Augmented Reality Based Facility Layout Planning And Optimization, Tan Chee Hau

Student Works (2020-2029)

This study presents an augmented reality (AR) based facility layout planning (FLP) system with an optimization algorithm to assist facility layout designers in decision making. AR is a technology that blends virtual data such as 3 Dimensional (3D) model into the actual world. FLP is about the allocation of facilities to achieve smooth, efficient and effective processes. FLP’s research can be divided into the procedural approach, algorithmic approach, Virtual Reality (VR) and AR-based approaches. AR-based FLP effectively addressed the traditional FLP issues such as facilitating the addition of a new machine in an existing production floor, rearrangement of machines’ sequence, …

Fsec Energy Research Center Highlights 2020, Brochure, Florida Solar Energy Center, Sherri Shields

FSEC Energy Research Center®

This 5-page "brochure" provides an overview of capabilities at the FSEC Energy Research Center. As Florida's statewide energy research center, FSEC has a 45-year history of basic and applied research excellence, which has grown in scope to include all aspects of renewable energy, energy storage, electric vehicles, and energy efficiency technologies. FSEC's education and outreach programs have trained thousands of energy practitioners and informed energy consumers. This document was originally created to inform City of Cocoa Council members about FSEC during their external visit to the Center in June 2020, during COVID-19. FSEC Art#: PIO-104

First-Order Comprehensive Adjoint Method For Computing Operator-Valued Response Sensitivities To Imprecisely Known Parameters, Internal Interfaces And Boundaries Of Coupled Nonlinear Systems: I. Mathematical Framework, Dan Gabriel Cacuci

Faculty Publications

This work presents the first-order comprehensive adjoint sensitivity analysis methodology (1st-CASAM) for computing efficiently the first-order sensitivities (i.e., functional derivatives) of operator-valued responses (i.e., model results) of general models of coupled nonlinear physical systems characterized by imprecisely known or and/or uncertain parameters, external boundaries, and internal interfaces between the coupled systems. The explicit mathematical formalism developed within the 1st-CASAM for computing the first-order sensitivities of operator-valued response to uncertain internal interfaces and external boundaries in the models’ phase–space enables this methodology to generalize all of the previously published methodologies for computing first-order response sensitivities. The computational resources needed for using …

Sharpening Ecostress And Viirs Land Surface Temperature Using Harmonized Landsat-Sentinel Surface Reflectances, Jie Xue, Martha C. Anderson, Feng Gao, Christopher Hain, Liang Sun, Yun Yang, Kyle R. Knipper, William P. Kustas, Alfonso F. Torres-Rua, Mitch Schull

Civil and Environmental Engineering Faculty Publications

Land surface temperature (LST) is a key diagnostic indicator of agricultural water use and crop stress. LST data retrieved from thermal infrared (TIR) band imagery, however, tend to have a coarser spatial resolution (e.g., 100 m for Landsat 8) than surface reflectance (SR) data collected from shortwave bands on the same instrument (e.g., 30 m for Landsat). Spatial sharpening of LST data using the higher resolution multi-band SR data provides an important path for improved agricultural monitoring at sub-field scales. A previously developed Data Mining Sharpener (DMS) approach has shown great potential in the sharpening of Landsat LST using Landsat …

2020 Fall Engr333 A-Days Assignment, Matthew K. Heun

ENGR 333

The Fall 2020 semester ENGR333 class did not have an all-class project, due to the COVID-19 pandemic.

Instead, we held a series of Alumni Days (A-days), in which an alumnus in an energy-related field shared their experiences with students. Students reviewed the alumnus’ CV and asked questions during an online class meeting.

Raman Spectra-Based Deep Learning: A Tool To Identify Microbial Contamination, Murali K. Maruthamuthu, Amir Hossein Raffiee, Denilson Mendes De Oliveira, Arezoo M. Ardekani, Mohit S. Verma

Purdue University Libraries Open Access Publishing Fund

Deep learning has the potential to enhance the output of in-line, on-line, and at-line instrumentation used for process analytical technology in the pharmaceutical industry. Here, we used Raman spectroscopy-based deep learning strategies to develop a tool for detecting microbial contamination. We built a Raman dataset for microorganisms that are common contaminants in the pharmaceutical industry for Chinese Hamster Ovary (CHO) cells, which are often used in the production of biologics. Using a convolution neural network (CNN), we classified the different samples comprising individual microbes and microbes mixed with CHO cells with an accuracy of 95%–100%. The set of 12 microbes …

Permeable Road Pavement With Subsurface Precast Micro-Detention Storage: A Green Pavement Practice, Norazlina Bateni

Student Works (2020-2029)

Green infrastructure practices are uniquely applicable to address the relationship between land use and water resources through the replication of the natural hydrological process within the landscape. Implementation of such practices, especially green pavement can significantly improve the rainfall-runoff responses, and thereby minimise the occurrence of flood hazards, which may lead to uncountable economic losses. Common permeable pavements are typically composed of fine-layered particles attributed to low porosity. In this study, an innovative permeable pavement with a micro-detention pond storage (PPDS) system is proposed. It is a modified type of interlocking block permeable pavement consisting of a hollow cylinder with …

A Control System For A Constrained Two-Body Wave Energy Converter, Shangyan Zou, Ossama Abdelkhalik

Michigan Tech Publications, Part 1

Wave energy can be used to power oceano-graphic buoys. A new switching control strategy is developed in this paper for a two-body heaving wave energy converter that is composed of a floating cylinder and two rigidly connected submerged hemispheres. This control strategy is designed to prevent excessive displacement of the floating buoy that may occur due to the actuator force. This control strategy switches the control between a multi-resonant controller and a nonlinear damping controller, depending on the state of the system, to account for displacement constraints. This control strategy is developed using a one-degree-of-freedom dynamic model for the relative …

Component Analysis Of Bio-Asphalt Binder Using Crumb Rubber Modifier And Guayule Resin As An Innovative Asphalt Replacer, Ahmed Hemida, Magdy Abdelrahman

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This research seeks to interpret the component analysis of an innovative bio-asphalt binder using guayule resin in addition to crumb rubber modifier (CRM) at high concentrations. Such asphalt modification aims to minimize the dependency on virgin asphalt binder and provide new solutions concerning sustainable, flexible pavement industry. Guayule resin is a promising bioresource for asphalt binder replacement. By now, it could be considered a no value byproduct extracted during the guayule natural rubber production. CRM is a recycled material derived from scrap tires. The provided interpretation could help in understanding the asphalt-rubber-guayule interaction mechanism. Fourier transform infrared spectroscopy (FTIR), supported …