Digital Commons Network^™

Utilizing A New Eco-Friendly Drilling Mud Additive Generated From Wastes To Minimize The Use Of The Conventional Chemical Additives, Abo Taleb T. Al-Hameedi, Husam H. Alkinani, Mohammed M. Alkhamis, Shari Dunn-Norman

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

The cost of the drilling operation is very high. Drilling fluid presents 15 to 30% of the entire expense of the drilling process. Ordinarily, the major drilling fluids additives are viscosity modifiers, filtration control agents, and partial loss treatments. In this experimental work, full-set measurements under fresh and aged conditions, as well as high-temperature and high-pressure (HTHP) API filtration, were conducted to study the impacts of adding 0.5%, 1.5%, 2.5%, and 3.5% of black sunflower seeds’ shell powder (BSSSP) to spud mud. BSSSP of various grain sizes showed their ability to be invested for viscosity modifying, seepage loss controlling, and …

Polyrad -- Protection Against Free Radical Damage, Hannah Kim, Yin Tse, Andrew Webb, Ethan Mudd, Muhammad Raisul Abedin, Melanie R. Mormile, Subhadeep Dutta, Kaushal Rege, Sutapa Barua

Biological Sciences Faculty Research & Creative Works

The effects of elevated levels of radiation contribute to the instability of pharmaceutical formulations in space compared to those on earth. Existing technologies are ineffective at maintaining the therapeutic efficacies of drugs in space. Thus, there is an urgent need to develop novel space-hardy formulations for preserving the stability and efficacy of drug formulations. This work aims to develop a novel approach for the protection of space pharmaceutical drug molecules from the radiation-induced damage to help extend or at least preserve their structural integrity and potency. To achieve this, free radical scavenging antioxidant, Trolox was conjugated on the surface of …

Optimization And Characterization Of Novel Injection Molding Process For Metal Matrix Syntactic Foams, Myranda Spratt, Joseph William Newkirk

Materials Science and Engineering Faculty Research & Creative Works

Metal matrix syntactic foams are particulate composites comprised of hollow or porous particles embedded in a metal matrix. These composites are difficult to manufacture due primarily to the lightweight, relatively fragile filler material. In this work, an injection molding process was developed for metal matrix syntactic foams. First, an aqueous binder was optimized for low-pressure injection molding. A mixture model was used to optimize the composition of the binder to achieve the highest relative density. The model predicted the maximum relative density was at a binder composition (in vol.%) of 7% agar, 4% glycerin, and 89% water. Second, this binder …

An Overview Of Ceramic Molds For Investment Casting Of Nickel Superalloys, Janos E. Kanyo, Stefan Schafföner, R. Sharon Uwanyuze, Kaitlynn S. Leary

Materials Science and Engineering Faculty Research & Creative Works

Accelerating advancements in technological systems have demonstrated a need for alloys with drastically improved thermomechanical and chemical properties, called superalloys. Ceramic molds are typically used in near-net shape investment casting processes of superalloy components due to their chemical inertness and high-temperature capabilities. Ceramic molds, however, often suffer from shortcomings in vital properties including flexural strength, thermal shock resistance, permeability, dimensional stability, corrosion resistance, and leachability, which have restricted their ability to adequately process modern alloy castings. This study analyses these limitations and illustrates how to address them, particularly regarding ceramic mold and slurry design, processing of shells and cores, material …

Manipulating Air-Gap Electrospinning To Create Aligned Polymer Nanofiber-Wrapped Glass Microfibers For Cortical Bone Tissue Engineering, Houston R. Linder, Austin A. Glass, Delbert E. Day, Scott A. Sell

Materials Science and Engineering Faculty Research & Creative Works

Osteons are the repeating unit throughout cortical bone, consisting of canals filled with blood and nerve vessels surrounded by concentric lamella of hydroxyapatite-containing collagen fibers, providing mechanical strength. Creating a biodegradable scaffold that mimics the osteon structure is crucial for optimizing cellular infiltration and ultimately the replacement of the scaffold with native cortical bone. In this study, a modified air-gap electrospinning setup was exploited to continuously wrap highly aligned polycaprolactone polymer nanofibers around individual 1393 bioactive glass microfibers, resulting in a synthetic structure similar to osteons. By varying the parameters of the device, scaffolds with polymer fibers wrapped at angles …

An Efficient 3-D Stochastic Hie-Fdtd Algorithm For Investigation Of Statistical Variation In Electromagnetic Field, Kaikun Niu, Zhixiang Huang, Xingang Ren, Ke Xu, Minquan Li, Xianliang Wu, Ping Li, Lijun Jiang, Hakan Bagci

Electrical and Computer Engineering Faculty Research & Creative Works

We propose a stochastic hybrid implicit-explicit finite-difference time-domain method (S-HIE-FDTD) to compute the mean and variance of the electromagnetic (EM) fields using a single simulation, given those of the conductivity and permittivity in the computation domain. The mean and variance field update equations underlying the proposed method are derived from the field update equations of the 'traditional' deterministic HIE-FDTD. The Courant-Friedrichs-Lewy condition of the S-HIE-FDTD depends on the spatial discretization sizes only in two dimensions; therefore, for computation domains with fine geometric features only in the remaining dimension, it uses a time step size that is larger than that of …

Vibration Analysis Of Simultaneous Drilling And Reaming Bha, Mohammed F. Al Dushaishi, Daniel S. Stutts

Mechanical and Aerospace Engineering Faculty Research & Creative Works

The drillstring used in the oil and gas exploration is a complex structure due to the different forces acting on it. One of the primary sources of drillstring vibrations is the cutting forces caused by the drill bit contact with the rock formation. In some drilling applications, such as hole enlargement and underreaming, the source of the cutting action originates from the drill bit as well as the reamer which increases the dynamic complexity of the drillstring. This paper’s objective is to investigate the torsional vibration behaviors of the bottom hole assembly (BHA) under simultaneous drilling and reaming. More specifically, …

Coalescence Speed Of Two Equal-Sized Nanobubbles, Eric Bird, Jun Zhou, Zhi Liang

Mechanical and Aerospace Engineering Faculty Research & Creative Works

In This Work, We Use Molecular Dynamics (MD) Simulations Coupled with Continuum-Based Theoretical Analysis to Study the Coalescence Dynamics of Two Equal-Sized Nanobubbles (NBs). We First Derive a Governing Equation for the Evolution of the Capillary Bridge Radius between Two Coalescing NBs from the Axisymmetric Navier-Stokes Equation. to Verify the Prediction from the Governing Equation, We Carry Out MD Simulations of the Coalescence of Two NBs in a Lennard-Jones Fluid System and Directly Measure the Bridge Radius, Rb, as a Function of Time, T. by Varying the Bubble Diameter, We Change the NB Ohnesorge Number from 0.46 to 0.33. in …

Scholars' Mine Quick Facts August 2020, Nancy S. Krost

Scholars’ Mine Statistics

Scholars' Mine Quick Facts are monthly reports of downloads, page hits, and other information about works in the institutional repository of Missouri S&T. A map with downloads by region is also included.

The Technology Fast: Transformational Learning As Changes In Behavior And Perception Beyond The Classroom, Daniel Burton Shank, Nathan Shank, Mallory North

Psychological Science Faculty Research & Creative Works

Digital technology has become an integral, if not overwhelming, part of many people’s lives. As the use and pervasiveness of technology has increased, the popularity of taking a sabbath from it has also increased. In this paper we ask if and how a technology fast assignment influences students’ lives beyond the classroom. Transformative learning, supported by active and experiential learning, suggests that in order for students to reap the greatest benefits of education, learning must influence perceptions and behavior outside of the class environment. In two semesters of “Human-Computer Interaction” classes, students were assigned a technology fast in which they …

Scholars' Mine Quick Facts July 2020, Nancy S. Krost

Scholars’ Mine Statistics

Scholars' Mine Quick Facts are monthly reports of downloads, page hits, and other information about works in the institutional repository of Missouri S&T. A map with downloads by region is also included.

Scholars' Mine Quick Facts June 2020, Nancy S. Krost

Scholars’ Mine Statistics

Scholars' Mine Quick Facts are monthly reports of downloads, page hits, and other information about works in the institutional repository of Missouri S&T. A map with downloads by region is also included.

Analysis Of Electric Vehicle Charging Behavior Patterns With Function Principal Component Analysis Approach, Chenxi Chen, Yang Song, Xianbiao Hu, Ivan G. Guardiola

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This manuscript focused on analyzing electric vehicles’ (EV) charging behavior patterns with a functional data analysis (FDA) approach, with the goal of providing theoretical support to the EV infrastructure planning and regulation, as well as the power grid load management. 5-year real-world charging log data from a total of 455 charging stations in Kansas City, Missouri, was used. The focuses were placed on analyzing the daily usage occupancy variability, daily energy consumption variability, and station-level usage variability. Compared with the traditional discrete-based analysis models, the proposed FDA modeling approach had unique advantages in preserving the smooth function behavior of the …

Scholars' Mine Reaches 5 Million Downloads, Nancy S. Krost

Scholarly Communications - Educational and Promotional Materials

On 19 Nov 2020 Scholars' Mine reached a new milestone: five million downloads. Readership in Scholars' Mine continued to be robust: the latest million downloads took place in about 7 months, compared to 11 months to 4 million and 14 months to 3 million.

The 5 millionth download was by a user in San Francisco, California: Design Recommendations for Steel Deck Floor Slabs. This publication was one of the ten most downloaded during the past seven months and is the third most downloaded all time in Scholars’ Mine.

Other highlights of Scholars' Mine are discussed.

Download the pdf here …

Faculty Senate Meeting Minutes Nov 19, 2020, Missouri University Of Science And Technology Faculty Senate

Minutes & Agendas

No abstract provided.

Induced Interactions And Quench Dynamics Of Bosonic Impurities Immersed In A Fermi Sea, K. Mukherjee, Simeon I. Mistakidis, S. Majumder, P. Schmelcher

Physics Faculty Research & Creative Works

We Unravel The Ground-State Properties And The Nonequilibrium Quantum Dynamics Of Two Bosonic Impurities Immersed In A One-Dimensional Fermionic Environment By Applying A Quench Of The Impurity-Medium Interaction Strength. In The Ground State, The Impurities And The Fermi Sea Are Phase Separated For Strong Impurity-Medium Repulsions While They Experience A Localization Tendency Around The Trap Center For Large Attractions. We Demonstrate The Presence Of Attractive Induced Interactions Mediated By The Host For Impurity-Medium Couplings Of Either Sign And Analyze The Competition Between Induced And Direct Interactions. A Quench To Repulsive Interactions Triggers A Breathing Motion In Both Components, With An …

The Missouri Miner, November 18, 2020

The Missouri Miner Newspaper

No abstract provided.

Experimental Evaluation Of The Deadtime Phenomenon For Gm Detector: Deadtime Dependence On Operating Voltages, Bader Almutairi, Syed B. Alam, Tayfun Akyurek, Cameron S. Goodwin, Shoaib Usman

Nuclear Engineering and Radiation Science Faculty Research & Creative Works

A detailed analysis of Geiger Mueller counter deadtime dependence on operating voltage is presented in the manuscript using four pairs of radiation sources. Based on two-source method, detector deadtime is calculated for a wide range of operating voltages which revealed a peculiar relationship between the operating voltage and the detector deadtime. In the low voltage range, a distinct drop in deadtime was observed where deadtime reached a value as low as a few microseconds (22 µs for ²⁰⁴Tl, 26 µs for ¹³⁷Cs, 9 µs for ²²Na). This sharp drop in the deadtime is possibly due to reduced …

A Deep Neural Network-Based Estimation Of Efficiency Enhancement By An Intermediate Coil In Automotive Wireless Power Transfer System, Boogyo Sim, Daehwan Lho, Dongryul Park, Seungtaek Jeong, Seongsoo Lee, Hongseok Kim, Hyunwook Park, Hyungmin Kang, Seokwoo Hong, Joungho Kim

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, we proposed a deep neural network (DNN)-based estimation of efficiency enhancement by an intermediate (Int) coil in automotive wireless power transfer (WPT) system. The Int coil can enhance the efficiency in the WPT system with the proper resonant frequency of the Int coil. The previous study has explained the resonant frequency of the Int coil should be higher than the operating frequency. According to the resonant frequency of the Int coil, we can achieve the amount of efficiency enhancement. Therefore, the design of the Int coil is essential for optimize the efficiency enhancement of the automotive WPT …

Optimal Matching Reactance Design And Validation In Wireless Power Transfer System For Electric Vehicle Based On Sae J2954-Rp, Anfeng Huang, Dongwook Kim, Qiusen He, Hanyu Zhang, Yuyu Zhu, Hongseok Kim, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

Wireless power transfer (WPT) is foreseen as a suitable technology to provide charging without cables to electric vehicles. The charging requires a specific charging profile for different type of battery. In addition, the loading condition of the charging circuit could change drastically as following the charging profile. Due to the dependencies on loading condition, the transmission efficiency of a WPT system could degrade during the charging process. Nevertheless, the sensitivity of efficiency to loading condition could be reduced with proper design of compensation network, e.g., LCC. In this paper, a SPICE-simulation based optimization flow is demonstrated for matching reactance optimization …

Cochlear Implant Wireless Power Transfer System Design For High Efficiency And Link Gain Stability Using A Proposed Stagger Tuning Method, Seokwoo Hong, Seungtaek Jeong, Seongsoo Lee, Boogyo Sim, Hongseok Kim, Hoseung Lee, Woojin Ahn, Jonghyeok Park, Seunghoom Lee, Joungho Kim

Electrical and Computer Engineering Faculty Research & Creative Works

In recent years, wireless power transfer (WPT) technology is becoming an increasingly important part of the various applications because of its safety. Especially, medical implant devices such as a cochlear implant are one of the typical applications of the WPT technology. Because of the individual body differences, however, the coupling coefficient of the WPT system can be changed. Therefore, the coupling coefficient-insensitivity is very important design issue. In this paper, we propose a stagger tuning method of a cochlear implant WPT system. The proposed method makes the cochlear implant WPT system stable at the link gain regardless of the coupling …

The Missouri Miner, November 11, 2020

The Missouri Miner Newspaper

No abstract provided.

New Proper Orthogonal Decomposition Approximation Theory For Pde Solution Data, Sarah Locke, John R. Singler

Mathematics and Statistics Faculty Research & Creative Works

In our previous work [J. R. Singler, SIAM J. Numer. Anal., 52 (2014), pp. 852- 876], we considered the proper orthogonal decomposition (POD) of time varying PDE solution data taking values in two different Hilbert spaces. We considered various POD projections of the data and obtained new results concerning POD projection errors and error bounds for POD reduced order models of PDEs. In this work, we improve on our earlier results concerning POD projections by extending to a more general framework that allows for nonorthogonal POD projections and seminorms. We obtain new exact error formulas and convergence results for POD …

Investigation Of Bolted Connections In Cold-Formed Steel Members Using Sae J429 Bolts, Babak Yeganeh, Cheng Yu

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

The report presents a research project aimed at comparing ASTM and SAE J429 bolts. The research includes comparison of those two bolt standards in terms of tensile strength, chemical and mechanical properties, shanks length, head size, thread profile and bolt styles. The research shows that the overall dimension, tensile strength, head and shank size for both standards are the same and no considerable difference is observed.

Spincoating Epitaxial Films, Jay A. Switzer

Chemistry Faculty Research & Creative Works

A process for forming an epitaxial film comprising spinning a substrate having an ordered crystal structure ; heating the substrate during spinning to a temperature between 70° C. and 150° C .; dripping epitaxial film precursor solution onto the spinning substrate , where the precursor solution comprises inorganic film precursor material in a solvent ; and continuing the heating and spinning to remove the solvent and epitaxially grow the epitaxial film on the substrate .

The Missouri Miner, November 4, 2020

The Missouri Miner Newspaper

No abstract provided.

Rural Access To Industry 4.0: Barriers From The Infrastructure Planning Front Lines, Javier Valentin-Sivico, Casey I. Canfield, Ona Egbue

Engineering Management and Systems Engineering Faculty Research & Creative Works

Many rural communities lack adequate broadband infrastructure, which limits the economic development potential in these regions. They are not able to attract new businesses, and established businesses are unable to use tools and services that require high-speed internet. Broadband access is a requirement for the Internet of Things, robotics, and big data, which are part of Industry 4.0 and the future economy. Such technological advances are not only transforming the manufacturing environments and the service industry, but also finding applications in the food supply chain, such as precision agriculture. In this study, we conducted 17 semi-structured interviews (11 reported here) …

A Markov Chain Approach For Forecasting Progression Of Opioid Addiction, Abhijit Gosavi, Susan L. Murray, N. Karagiannis

Engineering Management and Systems Engineering Faculty Research & Creative Works

The U.S. is currently facing an opioid crisis. Naltrexone is a common treatment for drug addiction; it reduces the desire to take opiates. However, addicts often stop treatment or continue to use opioids while in treatment. This results in increased fatalities and associated costs. A Markov-chain model is presented to analyze the progression of opioid addiction to assist the medical community in developing appropriate treatments. The model includes patients who continue opiate use while on naltrexone (blocked patients) and those who use opiates after missing naltrexone doses (unblocked patients). The other types of patients are abstinent (the best-case scenario) and …

Investigation Of The Evaporation Rate Of Water From Colloidal Unimolecular Polymer (Cup) Systems By Isothermal Tga, Peng Geng, Ashish Zore, Michael R. Van De Mark

Chemistry Faculty Research & Creative Works

Studies of the evaporation of aqueous nanoparticle solutions have been limited due to lack of homogeneity of the solution, difficulties in obtaining reproducible samples and stability of substrates, as well as the effect of other volatile components or contaminants such as surfactants. Colloidal unimolecular polymer (CUP) is a spheroidal nanoparticle with charged hydrophilic groups on the surface, and the particle size ranges from 3 to 9 nm. The large amount of surface water on the CUP surface provides the opportunity to evaluate the evaporation of surface water, which may contribute to the investigation the factors that affect the evaporation rate …

Explosive Compaction Of Additively Manufactured Material, Phillip R. Mulligan, Cody Lough, Douglas A. Bristow, Edward Kinzel, Catherine E. Johnson

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Selective Laser Melting (SLM) is an additive manufacturing (AM) technique that uses a laser to locally fuse material in a metal-powder bed. The process is performed in layers enabling significant geometric freedom over traditional manufacturing techniques. During the deposition process, the metal is locally melted and rapidly self-quenched, leading to rapid solidification with well-defined melt-pool boundaries. Analogies are often drawn to the microstructure created in welding, albeit extending to the entire part. The SLM process parameters are optimized to produce near full density metal parts. The process parameters can also be adjusted to produce local regions that are of unmelted …