Engineering Commons^™

Characteristics Analysis Of The Geothermal Water In Heshan Coalfield Based On Hydrogeochemistry, Zhao Guanhua

Coal Geology & Exploration

Characteristics analysis of the geothermal water in Heshan Coalfield based on hydrogeochemistry

Contact Angle Measurement Using A Hele-Shaw Cell: A Proof-Of-Concept Study, Haipeng Zhang, Jacob Gottberg, Sangjin Ryu

Department of Mechanical and Materials Engineering: Faculty Publications

Contact angle is an important property to quantify the wettability of a solid surface with a liquid, which characterizes interactions of the solid-liquid pair. Generally, to measure contact angle, special instruments such as a goniometer are necessary, but they are not readily available in certain research settings. In this study, an alternative method to measure contact angle based on a Hele-Shaw cell, microscopy imaging, and image processing is suggested. In this method, a liquid drop is injected into a transparent Hele-Shaw cell, the meniscus of the drop is captured in the top or bottom view using a brightfield microscope, and …

Engineering The Surface Of Fe3o4 Nanoparticles For Catalytic And Magnetic Applications, Natalia Da Silva Moura

LSU Doctoral Dissertations

With the rapid depletion of the U.S. energy resources coupled with population growth, heat management technologies must be improved to sustain our quality of life. Precisely, in catalysis, it is estimated that only ~50% of the energy supplied to the reactor is used for product conversion due to dissipation losses. Among the emerging technologies with a promising reduction in heat losses is induction heating, offering targeted heat delivery with magnetic nanoparticles. Under alternating magnetic fields (AMF), these nanoparticles can absorb the energy from Radio-Frequency (RF) fields and dissipate it as heat on the nanoparticle surface. This in situ heat generation …

Communications, Decision-Making, And Interactions Of A Multi-Agent Autonomous Vehicle System, Daniel Davis Smith

LSU Doctoral Dissertations

Autonomous vehicles are becoming ever more common and offer many attractive benefits to society. They can operate for long periods of time unattended, operate in environments that may be dangerous to humans, perform time consuming or repetitive tasks and all with greater efficiency and lower costs than humans. For these vehicles to be able to do these things, algorithms need to be designed and optimized that allow them to interact with the real-world environment in safe, effective, and efficient ways.

We designed and built a set of three homogeneous water-based autonomous surface vehicles equipped with appropriate sensors and communications ability …

Exploring How Antecedent Precipitation Amount And The Effects Of Covid-19 Affect Stormwater Runoff Quality Along Urban Gradients, Daniel Ramirez, Katherine Gelsey

REU Final Reports

Stormwater runoff quality is affected by a multitude of factors including surrounding land characteristics, human activities, and antecedent precipitation amounts. We explore how seasonal and variable precipitation affect E. Coli, total suspended solids, nitrogen-nitrate, orthophosphate, lead, and zinc concentrations in Portland, OR, USA. Correlation analysis was conducted between the pollutant concentrations and antecedent rainfall each sample site received for the previous 1, 3, 5, 7, and 30 days from when the sample was taken. We ran Mann-Whitney tests to determine if the levels of the pollutants were statistically different between the wet season and the dry season. We found that …

Electrical & Computer Engineering News, Georgia Southern University

Electrical & Computer Engineering: News & Publications (2014-2023)

• ECE Department Welcomes New Faculty Members

Disturbance Triggers Non-Linear Microbe–Environment Feedbacks, Aditi Sengupta, Sarah J. Fansler, Rosalie K. Chu, Robert E. Danczak, Vanessa A. Garayburu-Caruso, Lupita Renteria, Hyun-Seob Song, Jason Toyoda, Jacqueline Wells, James C. Stegen

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Conceptual frameworks linking microbial community membership, properties, and processes with the environment and emergent function have been proposed but remain untested. Here we refine and test a recent conceptual framework using hyporheic zone sediments exposed to wetting–drying transitions. Our refined framework includes relationships between cumulative properties of a microbial community (e.g., microbial membership, community assembly properties, and biogeochemical rates), environmental features (e.g., organic matter thermodynamics), and emergent ecosystem function. Our primary aim was to evaluate the hypothesized relationships that comprise the conceptual framework and contrast outcomes from the whole and putatively active bacterial and archaeal communities. Throughout the system we …

Evaluation Of Stretch Film Behavior During Long-Term Storage Under Different Atmospheric Conditions, Kyle Dunno, Maria Symanski

Journal of Applied Packaging Research

This study examined the post-application behavior of two 20.3 micron machine stretch films, one categorized as high-performance and one as general-performance, for thirty days while stored at either 23°C or 38°C. For each film type, the stretch film was applied to a simulated unit load to produce neutral and positive applied total stretch scenarios. The relaxation curves developed from each test indicate the relaxation rate of the films varied based on the storage condition. Observed was an average of 41% containment loss for both high-performance and general-purpose films when the simulated loads were stored at 38°C. For simulated loads stored …

Chiziqlashtirish (Liniyalashtirish) Nazariyasining Ba’Zi Bir Muammolari, T.N. Gayubov, X.X. Jumanov

The Scientific Journal of Vehicles and Roads

Ushbu maqolada, chiziqli bо‘lmagan transformatsiyani olish usulini topishdan iborat bо‘lgan statik chiziqli chizish muammosi muhokama qilinadi. Ushbu ishda biz natijalarni boshqa usullar bilan taqqoslab, birgalikda statik va garmonik linearizatsiya bilan chiziqli bо‘lmagan ob’ektlarga dispersiya funksiyasini qо‘llashni kо‘rib chiqamiz. Chiziqli bо‘lmagan modellar turli xil chiziqli dinamik aloqalar va chiziqli bо‘lmagan inersial elementlarning kombinatsiyasi shaklida modellashtiriladi.

Yо‘L Harakatini Tashkil Etish Sohasidagi Mavjud Muammolar, Ularning Oqibatlari, Bartaraf Etishga Doir Vazifalar Va Takliflar, I.S. Sodiqov, А.A. Sattorov

The Scientific Journal of Vehicles and Roads

Avtotransport vositalari sonining oshib borayotganligi ularning xavfsizligini ta’minlash va yо‘l harakatini tashkil etishning davr talablariga muvofiq bо‘lgan normativ-huquqiy bazasini ham birdek takomillashtirib borishni taqozo etadi. О‘zbekiston Respublikasida yо‘l harakati xavfsizligi sohasidagi munosabatlar О‘zbekiston Respublikasining “Yо‘l harakati xavfsizligi tо‘g’risida”gi qonuni normalari asosida tartibga solingan

Analysis Of Modern And Resource-Efficient Technologies Used In The Assessment Of Transport And Operational Indicators Of Automobile Roads, A.X. Urokov, R.R. Soataliyev

The Scientific Journal of Vehicles and Roads

V dannoy statye izucheni vozmojnosti razlichnix prilojeniy, ispolzuemix dlya izmereniya rovnosti dorojnogo pokritiya s pomoshyu smartfonov, a takje proanalizirovani vozmojnosti, preimushestva i nedostatki dlya sozdaniya dorojnoy bazi dannix v usloviyax Uzbekistane.

Bus Rapid Transport System In Samarkand City, M. Malikov

The Scientific Journal of Vehicles and Roads

High-speed bus transportation is a system of high-speed public transport with a bus rolling stock, which allows achieving high passenger capacity, speed and quality of services provided at relatively low costs due to a set of characteristics: dedicated bus corridors, as a rule, axial placement (in the center of the street); off-board (before boarding the bus) fare collection system; landing at the platform level (the platform is at the same level with the bus floor); priority of bus transport at intersections and other elements of service quality assurance (in particular, information technology and building a strong brand).

О‘Zbekiston Respublikasi Iqlim Sharoitida Sementbeton Qoplamalarini Ekspluatatsiya Qilishning О‘Ziga Xos Xususiyatlari, A.X. Urokov, X.D. Urolova

The Scientific Journal of Vehicles and Roads

Ushbu maqolada sementbeton qoplamalarining respublika iqlim sharoitida ishlash xususiyatlari о‘rganiladi. Sementbeton qoplamalarini ekspluatatsiya qilish bо‘yicha ishlarni tо‘g‘ri tashkil etishning qoplamaning xizmat qilish muddatiga ta’siri tahlil qilindi. Beton qoplamalarni ekspluatatsiya qilish bо‘yicha Amerika tajribalari о‘rganildi. Havo harorati ta’sirida turli xil havo haroratidagi о‘zgarishlar va qoplamalarda yuzaga keladigan zо‘riqishlar tahlil qilindi. Respublikada mavjud operativ ishlarni tashkil etish muammolari tahlil qilindi. Quruq issiq iqlimning xususiyatlari о‘rganildi. Qoplamalarda nuqsonlar paydo bо‘lish sabablari tahlil qilinib, ularning paydo bо‘lishining oldini olish bо‘yicha tavsiyalar berildi. Rivojlangan mamlakatlarning texnologik jarayonlarni takomillashtirish tajribasi kо‘rib chiqilib, ushbu texnologiyalarni Respublikamiz sharoitida qо‘llash bо‘yicha takliflar berildi.

Qattiq Maishiy Chiqindilarni Tekislashda Buldozer Otvalining Samaradorlik Kо‘Rsatkichini Aniqlash, N.R. Aslonov, S.M. Mirxoliqov

The Scientific Journal of Vehicles and Roads

Qattiq chiqindilarni utilizasiyalashtirish, kо‘plab rivojlangan va rivojlanayotgan mamlakatlarning shaharlarida ham, qishloq tumanlarida ham juda muhim va keng tarqalgan muammo hisoblanadi. Qattiq maishiy chiqindilarni yig’ish va utilizasiyalashtirish bugungi kunda jahonning kо‘plab mamlakatlarini shahar muhitining asosiy muammolaridan biri. Qattiq maishiy chiqindilarni boshqarish bо‘yicha qarorlar moliyaviy turg’un, texnik amalga oshiriluvchan, ijtimoiy, yuridik maqbul va ekologik toza bо‘lishi kerak. Qattiq chiqindilarni boshqarish masalasi, ham kichik, ham katta shaharlarning xokimiyatlari uchun juda katta muammo hisoblanadi.

Gum Arabic-Capped Silver Nanoparticles For Electrochemical Amplification Sensing Of Methylene Blue In River Water, Ziad Khalifa, Moustafa Zahran, Magdy Zahran, Magdi Abdelazzem

Chemical Engineering

Herein, a novel electrochemical amplification sensor is developed for detecting methylene blue (MB) us- ing gum Arabic-capped silver nanoparticles (AgNPs) for the first time. Gum Arabic-AgNPs were fabricated via a direct chemical reduction technique using silver nitrate as an AgNPs precursor and gum Arabic as a reducing and capping agent. They were characterized using ultraviolet-visible (UV–Vis) spectrophotom- etry, square wave voltammetry (SWV), and transmission electron microscopy (TEM). UV–Vis and SWV results show the characteristic absorption and electrochemical oxidation peaks of the AgNPs at 431 nm and 0.18 V, respectively. Additionally, TEM images of the AgNPs show that they are spherical …

Using Computer Vision To Track Anatomical Structures During Cochlear Implant Surgery, Nicholas Bach

McKelvey School of Engineering Graduate Student Theses & Dissertations

There is a steep learning curve for surgeons performing cochlear implant surgeries. We aimed to use computer vision to track anatomical features with the goal of helping surgeons perform cochlear implant surgery without damaging the cochlea. We compared nine algorithms in total, seven object tracking algorithms and two optical flow algorithms utilizing the LucasKanade method, on manually created cochlear implant surgery videos to determine the accuracy associated with each. Compared with eight other algorithms, we observed that an iterative pyramidal implementation of the Lucas-Kanade (IPLK) method, implemented through OpenCV, performed the best. The IPLK method had the lowest error rate …

A Xanes Study Of Lithium Polysulfide Solids: A First-Principles Study, Qing Guo, Kah Chun Lau, Ravindra Pandey

Michigan Tech Publications, Part 1

X-ray absorption spectroscopy (XAS) is used for capturing the reaction mechanisms at the molecular level via the determination of local electronic configurations inside Li-S batteries. In this paper, a comprehensive investigation of the S K-edge X-ray absorption near-edge structure (XANES) of a series of stoichiometric lithium polysulfide solids was performed, assuming that these polysulfide solids are formed during the battery cycling process. The results based on density functional theory show that the pre-edge peak in the S K-edge XANES spectra is not a common feature in the solid phase in contrast to the case of pristine polysulfide molecules where the …

The Effect Of Severe Intraventricular Hemorrhage On The Biorhythms Of Feeding In Premature Infants, Ira H. Gewolb, Babatunde T. Sobowale, Frank L. Vice, Abhijit R. Patwardhan, Nino Solomonia, Eric W. Reynolds

Biomedical Engineering Faculty Publications

Background: Suck-swallow rhythmicity and the integration of breathing into infant feeding are developmentally regulated. Neurological injury and breathing abnormalities can both impact feeding in preterm infants.

Objective: To determine the effects of neurologic injury independent of effects of disordered breathing on feeding biorhythms in premature infants.

Methods: Low-risk preterm infants (LRP), infants with Grade 3–4 Intraventricular Hemorrhage (IVH), those with bronchopulmonary dysplasia (BPD), and those with both BPD and IVH (BPD+IVH) were identified. Forty-seven infants, 32–42 weeks Postmenstrual Age (PMA) were evaluated on one or more occasions (131 studies). Of these, 39 infants (81 studies) were performed at >35 weeks …

Design Of An Inexpensive Pvc Shock Tube For Educational Use, Brandon Edward Bergmann

Theses and Dissertations

Herein is described the design and function of a low-cost, easy-to-assemble, -operate, and -disassemble shock tube platform experiment that can generate shock waves approaching Mach 2 at maximum pressures of ~100 psig with a helium driver gas. The experiment uses several inexpensive (<$5), unamplified piezoelectric sensors attached to a multichannel oscilloscope to monitor the passage of key features of the flow (i.e., incident shock and reflected shock) through the tube, constructed from inexpensive and easy to work with schedule 40 PVC pipe and fittings. From the fixed sensor displacements along the tube and relative differences in respective transit times, the velocities of these flow features can be determined. This permits (1) comparison of experimental results to the theoretical predictions of 1-D transient gas dynamics and (2) a leaping off point for discussion and quantification of non-idealities in the flow, including the shock wave development length, shock attenuation and boundary layer growth, and interactions of the reflected shock and contact surface. Experimental accessories (future work) for study of shock focusing and steady 2-D high speed flows are also briefly discussed. Assuming both pressurized, conditioned air at ~80-100 psig and a modern multi-channel oscilloscope are available at most institutions, the total cost to construct this experiment is around $500.

Modeling Renal Function During Pregnancy, Christina A. Valtierra

REU Final Reports

The main goal of this research project is to build a computational model that illustrates the main processes in renal function during pregnancy. The analysis of how pregnancy affects all the factors that take place within the kidney will allow for a better understanding of how pathologies like proteinuria, hypertension, and glomerular endotheliosis develop. This model is a small part of a more complex model that showcases the complete pathophysiology of preeclampsia.

Liquid Fuel Oil Produced From Plastic Based Medical Wastes By Thermal Cracking, Shahriar Bin Rasul, Uday Som, Md. Shameem Hossain, Md. Wasikur Rahman

Mechanical Engineering Faculty Publications

The present work is an effort to produce liquid fuel oil from plastic based medical wastes through thermal cracking process under oxidizing conditions. The mixed plastics from medical wastes were considered as a feedstock, shredded into small pieces and heated at 773 ± 10 K for 40 min with a heating rate of 20 K/min in a batch reactor for thermal cracking process. The feedstock was characterized by proximate and ultimate analysis along with thermogravimetric investigation. Moreover, chemical compositions of the liquid fuel oil were examined by FTIR and GC–MS spectroscopy. The properties of liquid product were also examined and …

Application Of Epoxy-Asphalt Composite In Asphalt Paving Industry: A Review With Emphasis On Physicochemical Properties And Pavement Performances, Yu Chen, Nabil Hossiney, Xu Yang, Hainian Wang, Zhanping You

Michigan Tech Publications, Part 1

One of the failure mechanisms associated with asphalt paving layers, especially on steel deck bridges, is large permanent deformation, which adversely affects its long-term performance in service. Thus, epoxy resin was introduced in asphalt paving industry to tackle permanent deformation of asphalt mixtures due to its thermosetting nature. In this review, epoxy resin as a dominant component of the epoxy-asphalt composite system was first considered, followed by a discussion on its curing methods and curing mechanism. Furthermore, the physicochemical property and mechanical performance of epoxy asphalt and epoxy asphalt mixture were thoroughly examined. Crosslink density of epoxy asphalt dictates its …

E-Scooter Safety And How To Improve It, Eric Valentino

altREU Projects

In the last few years, electronic scooters have taken over cities as a means of personal transportation. Between 2017 and 2019 alone, over 30 million trips were recorded across over 100 cities in the US. These scooters pose a safety risk, as 20 in 100,000 trips will result in injury of the rider. On top of this, scooters can cause damage to property, injury pedestrians and motor vehicle drivers, as well as obstruct important infrastructure such as wheelchair ramps. For these reasons, it is important to develop an understanding of the factors that contribute to e-scooter related injuries in order …

Contributory Factors Of Fatigue Among Collegiate Aviation Pilots: An Ordinal Regression Analysis, Flavio A. C. Mendonca, Julius Keller, Daniel Kwasi Adjekum

Publications

Fatigue is a pervasive safety hazard in aviation affecting several aspects of a pilot's’ ability to safely perform their jobs. Several factors can contribute to fatigue, including inadequate sleep, stress, long work hours, excessive workload, and inadequate nutritional habits. In addition to flight training, some factors including academic, social, part-time work, and emerging time management skills are unique for Title 14 Code of Federal Regulations (CFR) Part 141 collegiate aviation pilots. By utilizing the Collegiate Aviation Fatigue Inventory (CAFI-II) at eight flight programs (n = 422), the current study examined factors such as fatigue training received, time spent working/studying and …

High-Spatial-Resolution Transcriptomic Map Of The Mouse Lymph Node Microenvironment Using Deterministic Barcoding, Archibald Enninful, Yang Liu, Rong Fan

The Yale Undergraduate Research Journal

Spatial transcriptomics is an emerging approach which characterizes gene expression profiles for a more nuanced understanding of biological processes at a tissue level. This offers significant advantages over traditional omics which require the digestion of tissues and subsequent isolation of cells, during which the spatial information is completely lost. Lymph nodes are an integral part of the immune system and an in-depth analysis of its spatial organization will provide useful insights which can be applicable in the development of novel immunotherapies. In this study, the mouse lymph node is characterized using the newly developed microfluidic-based approach, Deterministic Barcoding in Tissue …

Navigation Service With Perspectives Of Digital Technology Developments In Maritime Sector, Hongzheng Zhang

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Safety Analysis Of Oog Cargo Stowage And Securing On Flat Rack, Zhendi Mu

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Exploring The Deformation Mechanics Of Coal Ribs Using The Distinct Element Modeling Approach, Maurice Sunkpal, Taghi Sherizadeh

Mining Engineering Faculty Research & Creative Works

Understanding coal rib geomechanics is essential for improving rib stability and eliminating fatality and injury trends due to rib failures. There are presently no standardized rib control practices available in most countries. In light of this observed dearth, this investigation aims to improve understanding of rib failure mechanisms using the distinct element modeling (DEM) technique. DEM is chosen because of its superior advantage to explicitly represent discontinuities and their constitutive behaviors, besides that of the intact rock matrix. To analyze the rib stability, a numerical monitoring protocol is implemented to monitor the deformation characteristics of the coal rock mass as …

Active Attestation Of Embedded Systems, Mark M. Stephenson, Patrick A. Reber, Patrick J. Sweeney, Scott R. Graham

AFIT Patents

An active attestation apparatus verifies at runtime the integrity of untrusted machine code of an embedded system residing in a memory device while it is being run/used with while slowing the processing time less than other methods. The apparatus uses an integrated circuit chip containing a microcontroller and a reprogrammable logic device, such as a field programmable gate array (FPGA), to implement software attestation at runtime and in less time than is typically possible with comparable attestation approaches, while not requiring any halt of the processor in the microcontroller. The reprogrammable logic device includes functionality to load an encrypted version …

Earth Imaging From The Surface Of The Moon With A Dscovr/Epic-Type Camera, Nick Gorkavyi, Simon Carn, Matt Deland, Yuri Knyazikhin, Nick Krotkov, Alexander Marshak, Et Al.

Michigan Tech Publications

The Earth Polychromatic Imaging Camera (EPIC) on the Deep Space Climate Observatory (DSCOVR) satellite observes the entire Sun-illuminated Earth from sunrise to sunset from the L1 Sun-Earth Lagrange point. The L1 location, however, confines the observed phase angles to ∼2°–12°, a nearly backscattering direction, precluding any information on the bidirectional surface reflectance factor (BRF) or cloud/aerosol phase function. Deploying an analog of EPIC on the Moon’s surface would offer a unique opportunity to image the full range of Earth phases, including observing ocean/cloud glint reflection for different phase angles; monitoring of transient volcanic clouds; detection of circum-polar mesospheric and stratospheric …