Engineering Commons^™

The Effect Of Noise-Reducing Acoustic Panels On The Noise Levels And Overall Safety Of Infant Sleep Machines, Pranav Poola

Journal of the South Carolina Academy of Science

Infant sleep machines (ISMs) are devices used to help infants fall asleep faster and stay asleep for longer amounts of time, yet they can often be too loud for infantile ears, which could potentially be dangerous. This research aimed to minimize the risks of infant sleep machines without reducing the effectiveness of the infant sleep machines themselves through the use of acoustic panels. Based on previous studies, it was hypothesized that the acoustic panels would reduce the noise levels of the ISM to less than recommended limits of 50 dB-A. A specific corner of a designated room was prepared with …

Merging Of Horizontally And Vertically Separated Small-Scale Buoyant Flames, Thomas H. Fletcher, Denver Haycock, Seth Tollefsen, David Lignell

Faculty Publications

The purpose of this study was to investigate the merging behavior of small-scale buoyant flames that might be representative of flames from a leaf in a shrub. Zirconia felt pads soaked in n-heptane were suspended on thin rods and spaced both horizontally and vertically. Time-dependent video images from flames from two-pad and three-pad configurations were analyzed to determine merging probability, combined flame characteristics (height, area, and width), and changes in burn time. Correlations of these combined flame characteristics were developed based on horizontal and vertical spacing between the pads. Merging probability correlated with an exponential function that was quadratic in …

Book Reviews, Usawc Press

The US Army War College Quarterly: Parameters

No abstract provided.

Great (Soft) Power Competition: Us And Chinese Efforts In Global Health Engagement, Michael W. Wissemann

The US Army War College Quarterly: Parameters

Global health engagement, an underutilized strategy rooted in the strengths of soft power persuasion, can lead to more military-to-military cooperation training, help establish relationships that can be relied on when crises develop, stabilize fragile states, and deny violent extremist organizations space for recruiting and operations. Examining Chinese efforts worldwide to curry favor and influence and the challenges posed by the COVID-19 pandemic, this article shows health as a medium is a very compelling and advantageous whole-of-government approach to national security policy concerns.

Samuel Huntington, Professionalism, And Self-Policing In The Us Army Officer Corps, Brian Mcallister Linn

The US Army War College Quarterly: Parameters

Drawing on Samuel P. Huntington’s three phases of self-regulation used to determine if an occupation qualifies as a profession, this article focuses on the third phase of policing and removing those who fail to uphold the standards set forth in the first two phases. It reviews how the US Army implemented this phase following the Civil War through the post–Vietnam War years and the implications for the officer corps.

Fault Recognition Based On Principal Component Analysis And K-Nearest Neighbor Algorithm, Zou Guangui, Ren Ke, Ji Yin, Ding Jianyu, Zhang Shaomin

Coal Geology & Exploration

Fault recognition based on principal component analysis and k-nearest neighbor algorithm

Application Of In-Seam Wave Technology In Geological Anomaly Detection Of Yangquan Mining Area, Fan Deyuan, Wu Guoqing, Ma Yanlong

Coal Geology & Exploration

Application of in-seam wave technology in geological anomaly detection of Yangquan Mining Area

Love Wave Full Waveform Inversion Via Pseudo-Hessian Gradient Pre-Conditioning Operator, Guan Jianbo, Li Yu, Yin Caiyun, Yang Zhi, Jin Chaobin, Zhao Meng, Yang Hang

Coal Geology & Exploration

Love wave full waveform inversion via Pseudo-Hessian gradient pre-conditioning operator

Research On The Model Of Accurate Exploitation And Utilization Of Underground Space Resources In Closed/Abandoned Mines, Liu Qinjie, Wang Jinjiang, Yang Ke, Di Shengjun, Dong Zhiyong

Coal Geology & Exploration

Research on the model of accurate exploitation and utilization of underground space resources in closed/abandoned mines

Spatial-Temporal Distribution Of Outburst Accidents From 2001 To 2020 In China And Suggestions For Prevention And Control, Zhang Chaolin, Wang Enyuan, Wang Yibo, Zhou Xifang

Coal Geology & Exploration

Spatial-temporal distribution of outburst accidents from 2001 to 2020 in China and suggestions for prevention and control

Water Inflow Forecasting Method Of Deep Buried Coal Working Face In Northern Ordos Basin, China, Yang Jian, Wang Hao, Liang Xiangyang, Huang Hao

Coal Geology & Exploration

Water inflow forecasting method of deep buried coal working face in northern Ordos Basin, China

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 …

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 …

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 …

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 …

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.