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The Impact Of Growth Mindset Training On Entrepreneurial Action Among Necessity Entrepreneurs: Evidence From A Randomized Control Trial, Shad Morris, W. Chad Carlos, Geoffrey Kistruck, Robert Lount, Tumsify Elly Thomas Jun 2023

The Impact Of Growth Mindset Training On Entrepreneurial Action Among Necessity Entrepreneurs: Evidence From A Randomized Control Trial, Shad Morris, W. Chad Carlos, Geoffrey Kistruck, Robert Lount, Tumsify Elly Thomas

Faculty Publications

Although entrepreneurship training programs are designed to help necessity entrepreneurs acquire skills and capabilities to take entrepreneurial action, participants in these programs often fail to do so. In partnership with a local government agency, we conducted a randomized field experiment involving 165 entrepreneurs in rural Tanzania where in addition to providing technical-skills training, approximately half of the participants also received ‘growth mindset’ psychological training. Those who received the growth mindset training displayed more entrepreneurial action in their business than those in the control group. Importantly, higher levels of entrepreneurial self efficacy mediated the positive impact on entrepreneurial action displayed by …

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Bringing The Analysis Of Electrodeposition Signals In Voltammetry Out Of The Shadows, Devin Rappleye, Ranon G. Fuller Jun 2023

Bringing The Analysis Of Electrodeposition Signals In Voltammetry Out Of The Shadows, Devin Rappleye, Ranon G. Fuller

Faculty Publications

Voltammetry studies of electrodeposition are growing rapidly. Yet, relations for the analysis of electrodeposition reactions in voltammetry remain relatively obscure in the literature. The existing cyclic and square wave voltammetry relations for electrodeposition and their limitations are discussed to increase awareness. A retrospective analysis is performed to demonstrate the impact of model selection in improving the analysis of electrodeposition behavior with voltammetric data. A repository for voltammetry models of electrodeposition is proposed to further increase familiarity and application of the most appropriate models, which would support a rapidly growing area of research and technological development.

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Zeolite Supported Pt For Depolymerization Of Polyethylene By Induction Heating, Bernard Whajah, Joseph N. Heil, Cameron L. Roman, James A. Dorman, Kerry M. Dooley Jun 2023

Zeolite Supported Pt For Depolymerization Of Polyethylene By Induction Heating, Bernard Whajah, Joseph N. Heil, Cameron L. Roman, James A. Dorman, Kerry M. Dooley

Faculty Publications

We demonstrate that for polyethylene depolymerization with induction heating (IH), using a bifunctional (Pt- or Pt− Sn-containing zeolite) hydrocracking catalyst, we can obtain high hydrocarbon product yields (up to 95 wt % in 2 h) at a relatively low surface temperature (375 °C) and with a tunable product distribution ranging from light gas products to gasoline- to diesel-range hydrocarbons. Four zeolite types [MFI, LTL, CHA(SSZ-13), and TON] were chosen as the supports due to their varying pore sizes and structures. These depolymerization results are obtained at atmospheric pressure and without the use of H2 and result in an alkane/alkene mixture …

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Imparting Systems Engineering Experience Via Interactive Fiction Serious Games, Thomas C. Ford, David Long, Echo Ford Jun 2023

Imparting Systems Engineering Experience Via Interactive Fiction Serious Games, Thomas C. Ford, David Long, Echo Ford

Faculty Publications

Serious games for education are becoming increasing popular. Interactive fiction games are some of the most popular in app stores and are also beginning to be heavily used in education to teach analysis and decision-making. Noting that it is difficult for systems engineers to experience all necessary situations which prepare them for the role of a chief engineer, in this paper, we explore the use of interactive fiction serious games to impart systems engineering experience and to teach systems engineering principles. The results of a cognitive viability, qualitative viability, and replayability analysis of 14 systems engineering serious games developed in …

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Estimating Intermittency Significance By Means Of Surrogate Data: Implications For Solar Wind Turbulence, Eliza Teodorescu, Marius Mihai Echim, Jay Johnson Jun 2023

Estimating Intermittency Significance By Means Of Surrogate Data: Implications For Solar Wind Turbulence, Eliza Teodorescu, Marius Mihai Echim, Jay Johnson

Faculty Publications

Introduction: Intermittency is a property of turbulent astrophysical plasmas, such as the solar wind, that implies irregularity and fragmentation, leading to non-uniformity in the transfer rate of energy carried by nonlinear structures from large to small scales. We evaluated the intermittency level of the turbulent magnetic field measured by the Parker Solar Probe (PSP) in the slow solar wind in the proximity of the Sun during the probe’s first close encounter. Methods: A quantitative measure of intermittency could be deduced from the normalized fourth-order moment of the probability distribution functions, the flatness parameter. We calculated the flatness of the magnetic …

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Effect Of Constrained Inter-Granular Regions On The Inverse Hall-Petch Phenomena, K. A. Darling, B. C. Hornbuckle, C. J. Marvel, V. H. Hammond, K. Solanki Jun 2023

Effect Of Constrained Inter-Granular Regions On The Inverse Hall-Petch Phenomena, K. A. Darling, B. C. Hornbuckle, C. J. Marvel, V. H. Hammond, K. Solanki

Faculty Publications

The paper makes an effort to lay out a critical assessment of grain size and its role in limiting strength gains in stable nanocrystalline (NC) metals. In particular, this study uses copper-tantalum binary alloys, in which the predominate mechanisms of grain boundary sliding and rotation are shut down, to decipher the breakdown of classical Hall-Petch behavior and its underlining mechanisms. Through varying grain sizes and tantalum concentrations, the results show Cu–Ta's strength exceeds the traditional strength limits anticipated when strictly applying smaller grain size translates to greater strength than that from the Hall-Petch relationship for NC Cu. Within this work, …

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A Bit-Parallel Tabu Search Algorithm For Finding Es2 -Optimal And Minimax-Optimal Supersaturated Designs, Luis B. Morales, Dursun A. Bulutoglu Jun 2023

A Bit-Parallel Tabu Search Algorithm For Finding Es2 -Optimal And Minimax-Optimal Supersaturated Designs, Luis B. Morales, Dursun A. Bulutoglu

Faculty Publications

We prove the equivalence of two-symbol supersaturated designs (SSDs) with N (even) rows, m columns, smax=4t+i, where i ∈ {0,2}, t ∈ Z≥0 and resolvable incomplete block designs (RIBDs) whose any two blocks intersect in at most (N+4t+i)/4 points. Using this equivalence, we formulate the search for two-symbol E(s2)-optimal and minimax-optimal SSDs with smax ∈ {2,4,6} as a search for RIBDs whose blocks intersect accordingly. This allows developing a bit-parallel tabu search (TS) algorithm. The TS algorithm found E(s2)-optimal and minimax-optimal SSDs achieving the sharpest known E(s2) lower bound with …

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Impact Of Zein And Lignin-Plga Biopolymer Nanoparticles Used As Pesticide Nanocarriers On Soybean Growth And Yield Under Field Conditions, Colin A.R. Bonser, Jaya Borgatta, Jason C. White, Carlos E. Astete, Cristina M. Sabliov, Jeffrey A. Davis Jun 2023

Impact Of Zein And Lignin-Plga Biopolymer Nanoparticles Used As Pesticide Nanocarriers On Soybean Growth And Yield Under Field Conditions, Colin A.R. Bonser, Jaya Borgatta, Jason C. White, Carlos E. Astete, Cristina M. Sabliov, Jeffrey A. Davis

Faculty Publications

Nanoparticles are being utilized in agriculture as fertilizers, pesticides, and agrochemical-carriers. Designed to be biocompatible and degradable, biopolymer nanoparticles were developed as an alternative to metallic nanoparticles, and though safe-by-design, polymeric nanoparticles must be field-tested prior to largescale use. Several field studies were conducted to observe detrimental effects of biopolymer nanoparticles on plant growth and yield using soybean, Glycine max (L.) Merr., as a model system. Biopolymer nanoparticles made from lignin or zein were applied as seed treatments to soybean seeds or as foliar sprays (zein only) to soybean plants. Studies using biopolymer nanoparticle seed treatments (nano-STs) measured the germination …

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Subaqueous Topographic Deformation In Abandoned Delta Lobes—A Case Study In The Yellow River Delta, China, Yunfeng Zhang, Yingying Chai, Caiping Hu, Yijun Xu, Yuyan Zhou, Huanliang Chen, Zijun Li, Shenting Gang, Shuwei Zheng Jun 2023

Subaqueous Topographic Deformation In Abandoned Delta Lobes—A Case Study In The Yellow River Delta, China, Yunfeng Zhang, Yingying Chai, Caiping Hu, Yijun Xu, Yuyan Zhou, Huanliang Chen, Zijun Li, Shenting Gang, Shuwei Zheng

Faculty Publications

Reduction in river discharge and sediment load has left deltaic lobes in the world’s many river deltas starving, but knowledge of how the subaqueous topography of these abandoned subdeltas responds to environmental changes is limited. In this study, we aimed to determine the long-term dynamics of the subaqueous seabed of abandoned delta lobes to advance current knowledge. As a case study, we selected an abandoned subdelta on the Yellow River Delta of the Bohai Sea, China, for which three-decade long (1984–2017) bathymetric data and long-term river discharge and sediment load records are available. We analyzed the seafloor surface change and …

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Indirect Functional Effects Of Neighbors On Food Web Compartments Could Not Overcome Density-Dependent Limited Growth Of A Grazing Minnow, Garrett W. Hopper, Keith B. Gido, Caryn C. Vaughn Jun 2023

Indirect Functional Effects Of Neighbors On Food Web Compartments Could Not Overcome Density-Dependent Limited Growth Of A Grazing Minnow, Garrett W. Hopper, Keith B. Gido, Caryn C. Vaughn

Faculty Publications

Ecosystems include diverse taxonomic and functional groups of animals with variable levels of niche overlap that can lead to direct and indirect interactions with positive or negative outcomes. Species feeding at low trophic positions might be sensitive to interactions with co-occurring functional groups (neighbors) that influence their food resources through various processes, such as indirect nutrient subsidies and trophic cascades. Employing a target-neighbor experimental design using large, outdoor mesocosms, we tested whether adding neighbors with different functional traits affected food web compartments relative to a control group that had grazing minnows, Campostoma anomalum (Central Stoneroller). Additionally, we tested whether growth …

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A Delayed Intervention Start Randomized Controlled Trial Of High- And Low-Tech Communication Training Approaches For School-Age Autistic Children With Co-Occurring Intellectual Disability, Shawn P. Gilroy, Joseph P. Mccleery, Geraldine Leader Jun 2023

A Delayed Intervention Start Randomized Controlled Trial Of High- And Low-Tech Communication Training Approaches For School-Age Autistic Children With Co-Occurring Intellectual Disability, Shawn P. Gilroy, Joseph P. Mccleery, Geraldine Leader

Faculty Publications

The researchers designed a delayed intervention start randomized controlled trial to compare improvements in functional communication following augmentative and alternative communication (AAC) interventions. The study compared outcomes from function-based applied behavior analytic (ABA) and eclectic non-ABA forms of classroom-based communication strategies (waitlist control) as well as from high- and low-tech forms of AAC. High-tech AAC consisted of tablet-based communication, and low-tech AAC used an exchange of picture cards. The community-based sample consisted of 29 autistic children with a co-occurring intellectual disability. Participants were randomized to groups (AAC, waitlist control), and each group received approximately 3 months of communication intervention. Multilevel …

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Immune Genotypes, Immune Responses, And Survival In A Wild Bird Population, Martha J. Nelson-Flower, Leanne A. Grieves, Jane M. Reid, Ryan R. Germain, Savo Lazic, Sabrina S. Taylor, Elizabeth A. Macdougall-Shackleton, Peter Arcese Jun 2023

Immune Genotypes, Immune Responses, And Survival In A Wild Bird Population, Martha J. Nelson-Flower, Leanne A. Grieves, Jane M. Reid, Ryan R. Germain, Savo Lazic, Sabrina S. Taylor, Elizabeth A. Macdougall-Shackleton, Peter Arcese

Faculty Publications

Individuals vary in their immune genotype, inbreeding coefficient f, immune responses, survival to adulthood, and adult longevity. However, whether immune genes predict survival or longevity, whether such relationships are mediated through immune responses, and how f affects immune genotype remain unclear. We use a wild song sparrow (Melospiza melodia) population in which survival to adulthood, adult longevity, and f were measured precisely, and in which immune responses have previously been assessed. We investigate four toll-like receptor (TLR) and the major histocompatibility complex (MHC) class IIB exon 2 genes. We test whether immune genes predict fitness (survival to adulthood or adult …

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Molecular Research In Rice, Prasanta K. Subudhi Jun 2023

Molecular Research In Rice, Prasanta K. Subudhi

Faculty Publications

No abstract provided.

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Quantum Fluctuations Spatial Mode Profiler, Charris Gabaldon, Pratik Barge, Savannah L. Cuozzo, Irina Novikova, Hwang Lee, Lior Cohen, Eugeniy E. Mikhailov Jun 2023

Quantum Fluctuations Spatial Mode Profiler, Charris Gabaldon, Pratik Barge, Savannah L. Cuozzo, Irina Novikova, Hwang Lee, Lior Cohen, Eugeniy E. Mikhailov

Faculty Publications

The spatial mode is an essential component of an electromagnetic field description, yet it is challenging to characterize it for optical fields with the low average photon number, such as in a squeezed vacuum. We present a method for the reconstruction of the spatial modes of such fields based on the homodyne measurements of their quadrature noise variance performed with a set of structured masks. We show theoretically that under certain conditions, we can recover individual spatial mode distributions by using the weighted sum of the basis masks, where weights are determined using measured variance values and phases. We apply …

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Systematic Kmtnet Planetary Anomaly Search. Viii. Complete Sample Of 2019 Subprime Field Planets, Youn Kil Jung, Weicheng Zang, Hanyue Wang, Cheongho Han, Andrew Gould, Andrzej Udalski, Wei Zhu, Michael D. Albrow, Sun Ju Chung, Kyu Ha Hwang, Yoon Hyun Ryu, In Gu Shin, Yossi Shvartzvald, Hongjing Yang, Jennifer C. Yee, Sang Mok Cha, Dong Jin Kim, Seung Lee Kim, Chung Uk Lee, Dong Joo Lee, Yongseok Lee, Byeong Gon Park, Richard W. Pogge, Dan Maoz, Michał K. Szymański, Jan Skowron, Radek Poleski, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek Jun 2023

Systematic Kmtnet Planetary Anomaly Search. Viii. Complete Sample Of 2019 Subprime Field Planets, Youn Kil Jung, Weicheng Zang, Hanyue Wang, Cheongho Han, Andrew Gould, Andrzej Udalski, Wei Zhu, Michael D. Albrow, Sun Ju Chung, Kyu Ha Hwang, Yoon Hyun Ryu, In Gu Shin, Yossi Shvartzvald, Hongjing Yang, Jennifer C. Yee, Sang Mok Cha, Dong Jin Kim, Seung Lee Kim, Chung Uk Lee, Dong Joo Lee, Yongseok Lee, Byeong Gon Park, Richard W. Pogge, Dan Maoz, Michał K. Szymański, Jan Skowron, Radek Poleski, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek

Faculty Publications

We complete the publication of all microlensing planets (and “possible planets”) identified by the uniform approach of the KMT AnomalyFinder system in the 21 KMT subprime fields during the 2019 observing season, namely, KMT-2019-BLG-0298, KMT-2019-BLG-1216, KMT-2019-BLG-2783, OGLE-2019-BLG-0249, and OGLE-2019-BLG-0679 (planets), as well as OGLE-2019-BLG-0344 and KMT-2019-BLG-0304 (possible planets). The five planets have mean log mass ratio measurements of (−2.6, −3.6, −2.5, −2.2, −2.3), median mass estimates of (1.81, 0.094, 1.16, 7.12, 3.34) M Jup, and median distance estimates of (6.7, 2.7, 5.9, 6.4, 5.6) kpc, respectively. The main scientific interest of these planets is that they complete the AnomalyFinder sample …

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Effects Of Yogurt With Carao (Cassia Grandis) On Intestinal Barrier Dysfunction, Α-Glycosidase Activity, Lipase Activity, Hypoglycemic Effect, And Antioxidant Activity, Ricardo S. Aleman, Jhunior Marcia, Ryan Page, Shirin Kazemzadeh Pournaki, Daniel Martín-Vertedor, Víctor Manrique-Fernández, Ismael Montero-Fernández, Kayanush Aryana Jun 2023

Effects Of Yogurt With Carao (Cassia Grandis) On Intestinal Barrier Dysfunction, Α-Glycosidase Activity, Lipase Activity, Hypoglycemic Effect, And Antioxidant Activity, Ricardo S. Aleman, Jhunior Marcia, Ryan Page, Shirin Kazemzadeh Pournaki, Daniel Martín-Vertedor, Víctor Manrique-Fernández, Ismael Montero-Fernández, Kayanush Aryana

Faculty Publications

Cell inflammation disrupts intestinal barrier functions and may cause disorders related to a leaky gut, possibly leading to diabetes. The objective of this study was to determine if carao (Cassia grandis) incorporated into yogurt enhances in vitro intestinal barrier function. To achieve this goal, Caco-2 cells were used as a model of intestinal barrier permeability. Caco-2 cells were treated with cytokines (interleukin-1β, tumor necrosis factor-α, interferon-γ, and lipopolysaccharide (LPS)) and yogurt with carao yogurt (CY) at different doses (1.3 g/L, 2.65 g/L, and 5.3 g/L). Real-time quantitative polymerase chain and immunofluorescence microscopy were applied to evaluate the expression and localization …

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User Guide For Urban Canopy Modeling In Wrf. Version 1.0, Corey L. Smithson, Natalie J. White, Hans R. Klomp, Eric C. Monson, Bradley R. Adams Jun 2023

User Guide For Urban Canopy Modeling In Wrf. Version 1.0, Corey L. Smithson, Natalie J. White, Hans R. Klomp, Eric C. Monson, Bradley R. Adams

Faculty Publications

Researchers at Brigham Young University (BYU) have developed this guide for running a WRF simulation using a single layer urban canopy model (UCM). This was developed specifically for the Greater Salt Lake Area but is adaptable to other urban areas. This guide includes information on running WRF simulations to study theoretical urban growth scenarios.

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Vortex Particle Method For Electric Ducted Fan In Non-Axisymmetric Flow, Eduardo Alvarez, Cibin Joseph, Andrew Ning Jun 2023

Vortex Particle Method For Electric Ducted Fan In Non-Axisymmetric Flow, Eduardo Alvarez, Cibin Joseph, Andrew Ning

Faculty Publications

The vortex particle method has been reformulated in recent work as a large eddy simulation (LES) in a scheme that is both meshless and numerically stable, solving long-standing issues of numerical stability. In this study, we build upon this meshless LES scheme to create a simulation framework for electric ducted fans. This poses the challenge of introducing solid boundaries in the vorticity form of the Navier-Stokes equations without a mesh. Rotor blades are introduced in our computational domain through an actuator line model (ALM) following well-established practices for LES. A novel, vorticity-based, actuator surface model (ASM) is developed for the …

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Constraints On The Timing Of The India-Asia Collision And Unroofing History Of The Himalayan Orogen Using Detrital Zircon U-Pb-Hf And Whole-Rock Sr-Nd Isotopes In Cretaceous-Miocene Lesser Himalayan Sedimentary Rocks, Wei Feng, Qingquan Meng, Chunhui Song, Xiaomin Fang, Guangsheng Zhuang, Pengju He, Shufen Yang, Jing Zhang, Yongfa Chen, Yihu Zhang Jun 2023

Constraints On The Timing Of The India-Asia Collision And Unroofing History Of The Himalayan Orogen Using Detrital Zircon U-Pb-Hf And Whole-Rock Sr-Nd Isotopes In Cretaceous-Miocene Lesser Himalayan Sedimentary Rocks, Wei Feng, Qingquan Meng, Chunhui Song, Xiaomin Fang, Guangsheng Zhuang, Pengju He, Shufen Yang, Jing Zhang, Yongfa Chen, Yihu Zhang

Faculty Publications

Cretaceous-Miocene sedimentary rocks in the Nepalese Lesser Himalaya provide an opportunity to decipher the timing of India-Asia collision and unroofing history of the Himalayan orogen, which are significant for understanding the growth processes of the Himalayan-Tibetan orogen. Our new data indicate that detrital zircon ages and whole-rock Sr-Nd isotopes in Cretaceous-Miocene Lesser Himalayan sedimentary rocks underwent two significant changes. First, from the Upper Cretaceous-Palaeocene Amile Formation to the Eocene Bhainskati Formation, the proportion of late Proterozoic-early Palaeozoic zircons (quantified by an index of 500–1200 Ma/1600–2800 Ma) increased from nearly 0 to 0.7–1.4, and the percentage of Mesozoic zircons decreased from …

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Thermoset Polymer Composites With Gradient Natural And Synthetic Fiber Reinforcement: Self-Healing, Shape-Memory, And Fiber Recyclability, Sakil Mahmud, John Konlan, Jenny Deicaza, Rachel Anna Schmidt, Guoqiang Li Jun 2023

Thermoset Polymer Composites With Gradient Natural And Synthetic Fiber Reinforcement: Self-Healing, Shape-Memory, And Fiber Recyclability, Sakil Mahmud, John Konlan, Jenny Deicaza, Rachel Anna Schmidt, Guoqiang Li

Faculty Publications

Natural fibers have high potential as renewable reinforcement for polymers; however, their lower load-carrying capacity compared to synthetic fibers significantly limits the wide application in fiber-reinforced polymer composites. In laminated composite beams under bending load, the normal stress is the highest on the top and bottom layers but is zero at the mid-plane, with almost a linear normal strain distribution. Although the shear stress is the highest at the mid-plane, it may not be a major concern as most polymers can survive the high shear stress. Using this concept, we have designed a hybrid fiber reinforcement in a gradient manner: …

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Near-Term Impact Of Covid-19 Pandemic On Seniors’ Crash Size And Severity, Saba Doulabi, Hany M. Hassan Jun 2023

Near-Term Impact Of Covid-19 Pandemic On Seniors’ Crash Size And Severity, Saba Doulabi, Hany M. Hassan

Faculty Publications

Recent research revealed that COVID-19 pandemic was associated with noticeable changes in travel demand, traffic volumes, and traffic safety measures. Despite the reduction of traffic volumes across the US, several recent studies indicated that crash rates increased across different states during COVID-19 pandemic. Although some recent studies have focused on examining the changes in traffic conditions and crash rates before and during the pandemic, not enough research has been conducted to identify risk factors to crash severity. Even the limited research addressing the contributing factors to crash severity were focused on the pool category of drivers and no insight is …

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On The Characteristics Of Fatigue Fracture With Rapid Frequency Change, Mohammad A. Amooie, K. P. Lijesh, Ali Mahmoudi, Elaheh Azizian-Farsani, Michael M. Khonsari Jun 2023

On The Characteristics Of Fatigue Fracture With Rapid Frequency Change, Mohammad A. Amooie, K. P. Lijesh, Ali Mahmoudi, Elaheh Azizian-Farsani, Michael M. Khonsari

Faculty Publications

The effect of sudden variations in working modes and fatigue behavior of CS 1018 is studied. A general model based on the framework of the fracture fatigue entropy (FFE) concept is developed to capture such changes. Fully reversed bending tests are performed on flat dog bone specimens with a series of variable frequency tests without turning the machine off to simulate fluctuating working conditions. The results are then post-processed and analyzed to assess how fatigue life changes when a component is subjected to sudden changes in multiple frequencies. It is demonstrated that regardless of the frequency changes, FFE remains constant …

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Rapid Evaluation Of Fatigue Limit Using Energy Dissipation, Ali Mahmoudi, Michael M. Khonsari Jun 2023

Rapid Evaluation Of Fatigue Limit Using Energy Dissipation, Ali Mahmoudi, Michael M. Khonsari

Faculty Publications

Four different experimental approaches for rapid estimation of fatigue limit (endurance limit) based on energy dissipation during cyclic loading are discussed. The presented approaches use energy dissipation and thermography and can reliably evaluate the fatigue limit of material by conducting the fatigue test on a single specimen. Results show that the released energy due to damage accumulation at the stress levels above the fatigue limit changes the trend of energy dissipation and that this trend can be used to predict the fatigue limit. Experimental results on CS 1018 and SS 304 specimens are presented to illustrate the utility of the …

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Feature Extraction Techniques For Noisy Distributed Acoustic Sensor Data Acquired In A Wellbore, Jagadeeshwar Tabjula, Jyotsna Sharma Jun 2023

Feature Extraction Techniques For Noisy Distributed Acoustic Sensor Data Acquired In A Wellbore, Jagadeeshwar Tabjula, Jyotsna Sharma

Faculty Publications

The distributed acoustic sensor (DAS) is a promising technology for real-time monitoring of wellbores and other infrastructures. However, the desired signals are often overwhelmed by background and environmental noise inherent in field applications. We present a suite of computationally inexpensive techniques for the real-time extraction of the gas signatures from noisy DAS data acquired in a 5163 ft. deep wellbore. The techniques are implemented on three well-scale DAS datasets, each representing multiphase flow conditions with different gas injection volumes, fluid circulation rates, and injection methods. The proposed denoising techniques not only helped in optimizing the gas slug signature despite the …

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Combining Community Observations And Remote Sensing To Examine The Effects Of Roads On Wildfires In The East Siberian Boreal Forest, Vera Kuklina, Oleg Sizov, Victor Bogdanov, Natalia Krasnoshtanova, Arina Morozova, Andrey N. Petrov Jun 2023

Combining Community Observations And Remote Sensing To Examine The Effects Of Roads On Wildfires In The East Siberian Boreal Forest, Vera Kuklina, Oleg Sizov, Victor Bogdanov, Natalia Krasnoshtanova, Arina Morozova, Andrey N. Petrov

Faculty Publications

The paper is aimed at assessing the associations between the road networks geography and dynamics of wildfire events in the East Siberian boreal forest. We examined the relationship between the function of roads, their use, and management and the wildfire ignition, propagation, and termination during the catastrophic fire season of 2016 in the Irkutsk Region of Russia. Document analysis and interviews were utilized to identify main forest users and road infrastructure functional types and examine wildfire management practices. We combined community observations and satellite remotely sensed data to assess relationships between the location, extent, and timing of wildfires and different …

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Effects Of Individual Strategies For Resource Access On Collaboratively Maintained Irrigation Infrastructure, Jordan L. Stern, Afreen Siddiqi, Paul N. Grogan Jun 2023

Effects Of Individual Strategies For Resource Access On Collaboratively Maintained Irrigation Infrastructure, Jordan L. Stern, Afreen Siddiqi, Paul N. Grogan

Faculty Publications

Built infrastructure for water and energy supply, transportation, and other such services underpins human well-being and socioeconomic development. A fundamental understanding of how infrastructure design and user strategies interact can guide important design decisions as well as policy formulation for ensuring long-term infrastructure viability in conjunction with improved individual user benefits. In this work, an agent based model (ABM) is developed to study this issue for the specific case of irrigation canals. Cooperatively maintained irrigation canals serve essential roles in sustaining agriculture-based economies in many regions. Canal system design can strongly affect benefits derived by distributed users, regional agricultural output, …

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Modeling Potential Damages Of Hurricanes At The Facility Scale: A Case Study Of Eglin Air Force Base, Alexander J. Baldwin, Christopher M. Chini, Steven J. Schuldt, Justin D. Delorit Jun 2023

Modeling Potential Damages Of Hurricanes At The Facility Scale: A Case Study Of Eglin Air Force Base, Alexander J. Baldwin, Christopher M. Chini, Steven J. Schuldt, Justin D. Delorit

Faculty Publications

Tropical cyclones have intensified and are expected to strengthen throughout the 21st century due to climate change impacts. Storm intensification poses a serious threat to coastal municipalities and infrastructure that are not designed to withstand future wind and storm surge potential. Coupled modeling software has been widely used to replicate extreme weather events and simulate climate change effects to understand the magnitude of vulnerability coastal regions face. However, these studies are often conducted at too coarse resolutions to provide decision makers with actionable information for facility-level adaptation. This study addresses this limitation using a coupled modeling approach by simulating climate-intensified …

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Nonsolvent-Induced Phase Separation Inside Liquid Droplets, Rami Alhasan, Tanner A. Wilcoxson, Dakota S. Banks, Sion Jung, Douglas R. Tree Jun 2023

Nonsolvent-Induced Phase Separation Inside Liquid Droplets, Rami Alhasan, Tanner A. Wilcoxson, Dakota S. Banks, Sion Jung, Douglas R. Tree

Faculty Publications

Nonsolvent-induced phase separation (NIPS) is a popular method for creating polymeric particles with internal microstructure, but many fundamental questions remain surrounding the kinetics of the complex coupled mass transfer and phase separation processes. In this work, we use simulations of a phase-field model to examine how (i) finite domain boundaries of a polymer droplet and (ii) solvent/nonsolvent miscibility affect the NIPS process. To isolate the effects of phase separation kinetics and solvent/nonsolvent mass transfer on the NIPS process, we study two different cases. First, we investigate droplet concentrations that originate inside the two-phase region, where phase separation kinetics alone governs …

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Active Learning Methodologies In A High Stakes Graduate Nursing Program, Nina Mclain, Mary Jane Collins, Lawanda Baskin May 2023

Active Learning Methodologies In A High Stakes Graduate Nursing Program, Nina Mclain, Mary Jane Collins, Lawanda Baskin

Faculty Publications

Active learning with student engagement has been demonstrated to improve knowledge retention and improve learning in graduate education. Nurse anesthesia education has traditionally been taught using lecture with slide presentations without considering student centered learning. Much attention has been given to active learning strategies to promote student engagement and content retention, yet little information exists regarding student preferences for in higher level graduate nursing courses. This mixed-methods study aimed to examine student learning preferences for seven different instructional methodologies; traditional lecture, a problem-based learning exercise, reading with workbook assignments, development of cognitive aids, game-based learning, practice questions, and a case …

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Hierarchical, Porous Hydrogels Demonstrating Structurally Dependent Mechanical Properties, Elisabeth Lloyd, Rami Alhasan, Sujata Dhakal, Svetlana Morozova, Douglas R. Tree, Robert Hickey May 2023

Hierarchical, Porous Hydrogels Demonstrating Structurally Dependent Mechanical Properties, Elisabeth Lloyd, Rami Alhasan, Sujata Dhakal, Svetlana Morozova, Douglas R. Tree, Robert Hickey

Faculty Publications

While hierarchical ordering is a distinctive feature of natural tissues and is directly responsible for their diverse and unique properties, research efforts to synthesize biomaterials have primarily focused on using molecular-based approaches without considering multiscale structure. Here, we report a bottom-up self-assembly process to produce highly porous hydrogels that resemble natural tissues both structurally and mechanically. Randomly oriented, physically crosslinked nanostructured micelles form the walls of aligned, polymer-rich pore walls that surround water-rich cavities. Extremely soft elastic modulus (<  1 kPa), highly stretchability (greater than 12-times), strain-hardening, and completely reversible deformation result from the hierarchical structure. Independent control of nano and macroscales is realized through the combination of polymer macromolecular parameters and processing conditions, directly impacting the resulting phase behavior. Here, we demonstrate precise control of the material structure and structure orientation over many orders of magnitude (e.g., nm – µm), and reveal how the multiscale structure directly impacts mechanical properties.

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