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2020

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Diota: Decentralized Ledger Based Framework For Data Authenticity Protection In Iot Systems, Lei Xu, Lin Chen, Zhimin Gao, Xinxin Fan, Taeweon Suh, Weidong Shi Jan 2020

Diota: Decentralized Ledger Based Framework For Data Authenticity Protection In Iot Systems, Lei Xu, Lin Chen, Zhimin Gao, Xinxin Fan, Taeweon Suh, Weidong Shi

Computer Science Faculty Publications

It is predicted that more than 20 billion IoT devices will be deployed worldwide by 2020. These devices form the critical infrastructure to support a variety of important applications such as smart city, smart grid, and industrial internet. To guarantee that these applications work properly, it is imperative to authenticate these devices and data generated from them. Although digital signatures can be applied for these purposes, the scale of the overall system and the limited computation capability of IoT devices pose two big challenges. In order to overcome these obstacles, we propose DIoTA, a novel decentralized ledger-based authentication framework for …

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Fusion Of 3d Lidar And Camera Data For Object Detection In Autonomous Vehicle Applications, Xiangmo Zhao, Pengpeng Sun, Zhigang Xu, Haigen Min, Hongkai Yu Jan 2020

Fusion Of 3d Lidar And Camera Data For Object Detection In Autonomous Vehicle Applications, Xiangmo Zhao, Pengpeng Sun, Zhigang Xu, Haigen Min, Hongkai Yu

Computer Science Faculty Publications

It’s critical for an autonomous vehicle to acquire accurate and real-time information of the objects in its vicinity, which will fully guarantee the safety of the passengers and vehicle in various environment. 3D LIDAR can directly obtain the position and geometrical structure of the object within its detection range, while vision camera is very suitable for object recognition. Accordingly, this paper presents a novel object detection and identification method fusing the complementary information of two kind of sensors. We first utilize the 3D LIDAR data to generate accurate object-region proposals effectively. Then, these candidates are mapped into the image space …

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Daily Stream Samples Reveal Highly Complex Pesticide Occurrence And Potential Toxicity To Aquatic Life, Julia E. Norman, Barbara J. Mahler, Lisa H. Nowell, Peter C. Van Metre, Mark W. Sandstrom, Mark A. Corbin, Yaorong Qian, James F. Pankow, Wentai Luo, Nicholas B. Fitzgerald, Multiple Additional Authors Jan 2020

Daily Stream Samples Reveal Highly Complex Pesticide Occurrence And Potential Toxicity To Aquatic Life, Julia E. Norman, Barbara J. Mahler, Lisa H. Nowell, Peter C. Van Metre, Mark W. Sandstrom, Mark A. Corbin, Yaorong Qian, James F. Pankow, Wentai Luo, Nicholas B. Fitzgerald, Multiple Additional Authors

Chemistry Faculty Publications and Presentations

Transient, acutely toxic concentrations of pesticides in streams can go undetected by fixed-interval sampling programs. Here we compare temporal patterns in occurrence of current-use pesticides in daily composite samples to those in weekly composite and weekly discrete samples of surface water from 14 small stream sites. Samples were collected over 10–14 weeks at 7 stream sites in each of the Midwestern and Southeastern United States. Samples were analyzed for over 200 pesticides and degradates by direct aqueous injection liquid chromatography with tandem mass spectrometry. Nearly 2 and 3 times as many unique pesticides were detected in daily samples as in …

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Synthesis Of Radioluminescent Caf2:Ln Core, Mesoporous Silica Shell Nanoparticles For Use In X-Ray Based Theranostics, Hayden Winter, Megan J. Neufeld, Lydia Makotamo, Conroy Sun, Andrea M. Goforth Jan 2020

Synthesis Of Radioluminescent Caf2:Ln Core, Mesoporous Silica Shell Nanoparticles For Use In X-Ray Based Theranostics, Hayden Winter, Megan J. Neufeld, Lydia Makotamo, Conroy Sun, Andrea M. Goforth

Chemistry Faculty Publications and Presentations

X-ray radiotherapy is a common method of treating cancerous tumors or other malignant lesions. The side effects of this treatment, however, can be deleterious to patient quality of life if critical tissues are affected. To potentially lower the effective doses of radiation and negative side-effects, new classes of nanoparticles are being developed to enhance reactive oxygen species production during irradiation. This report presents the synthesis and radiotherapeutic efficacy evaluation of a new nanoparticle formulation designed for this purpose, composed of a CaF2 core, mesoporous silica shell, and polyethylene glycol coating. The construct was additionally doped with Tb and Eu …

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Use Of Confocal Raman Microscopy To Characterise Ethyl Cyanoacrylate Adhesive Depth Curing, Kevin Raheem, John Cassidy, Tony Betts, Bernard Ryan Jan 2020

Use Of Confocal Raman Microscopy To Characterise Ethyl Cyanoacrylate Adhesive Depth Curing, Kevin Raheem, John Cassidy, Tony Betts, Bernard Ryan

Articles

In situ spatial temporal measurement of monomer conversion during adhesive bondline curing remains a challenging area. The aim of this work was to demonstrate the effectiveness of using confocal Raman microscopy in a specially configured experimental set-up, as a versatile tool for measuring monomer concentration changes as a function of both time and adhesive bond depth during ethyl cyanoacrylate polymerisation. This also allowed monitoring of the extent of polymerisation at the adhesive substrate interface independently of the bulk bondline polymerisation region. Key kinetic parameters such as inhibition time tlag, rate of reaction Rmax and extent of reaction [at]max were obtained …

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Finite Lifespan Of Solutions Of The Semilinear Wave Equation In The Einstein–De Sitter Spacetime, Anahit Galstian, Karen Yagdjian Jan 2020

Finite Lifespan Of Solutions Of The Semilinear Wave Equation In The Einstein–De Sitter Spacetime, Anahit Galstian, Karen Yagdjian

School of Mathematical & Statistical Sciences Faculty Publications

We examine the solutions of the semilinear wave equation, and, in particular, of the φq model of quantum field theory in the curved space-time. More exactly, for 1 < q < 4 we prove that the solution of the massless self-interacting scalar field equation in the Einstein-de Sitter universe has finite lifespan.

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Flows Of Co-Closed G_{2}-Structures, Sergey Grigorian Jan 2020

Flows Of Co-Closed G_{2}-Structures, Sergey Grigorian

School of Mathematical & Statistical Sciences Faculty Publications

We survey recent progress in the study of G_{2}-structure Laplacian coflows, that is, heat flows of co-closed G_{2}-structures. We introduce the properties of the original Laplacian coflow of G_{2}-structures as well as the modified coflow, reviewing short-time existence and uniqueness results for the modified coflow and well as recent Shi-type estimates that apply to a more general class of G_{2}-structure flows.

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Additions To Philippine Slender Skinks Of The Brachymeles Bonitae Complex (Reptilia: Squamata: Scincidae) Iv: Resurrection And Redescription Of Brachymeles Burksi, Cameron D. Siler, Elyse S. Freitas, Jennifer A. Sheridan, Stephanie N. Maguire, Drew R. Davis, Jessa L. Watters, Kai Wang, Arvin C. Diesmos, Rafe M. Brown Jan 2020

Additions To Philippine Slender Skinks Of The Brachymeles Bonitae Complex (Reptilia: Squamata: Scincidae) Iv: Resurrection And Redescription Of Brachymeles Burksi, Cameron D. Siler, Elyse S. Freitas, Jennifer A. Sheridan, Stephanie N. Maguire, Drew R. Davis, Jessa L. Watters, Kai Wang, Arvin C. Diesmos, Rafe M. Brown

School of Earth, Environmental, & Marine Sciences Faculty Publications

The diversity of Philippine amphibians and reptiles has increased over the last few decades, in part due to re-evaluation of species formerly believed to be widespread. Many of these investigations of widespread species have uncovered multiple closely related cryptic lineages comprising species complexes, each restricted to individual Pleistocene Aggregate Island Complexes (PAICs). One group in particular for which widespread cryptic diversity has been common is the clade of Philippine skinks of the genus Brachymeles. Recent phylogenetic studies of the formerly recognized widespread species Brachymeles bonitae have indicated that this species is actually a complex distributed across several major PAICs and …

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New County Records Of Amphibians And Reptiles From South Texas, Usa, Clinton J. Guadiana, Padraic S. Robinson, Matthew S. Schalk, Drew R. Davis Jan 2020

New County Records Of Amphibians And Reptiles From South Texas, Usa, Clinton J. Guadiana, Padraic S. Robinson, Matthew S. Schalk, Drew R. Davis

School of Earth, Environmental, & Marine Sciences Faculty Publications

Several species of amphibians and reptiles reach their northern range limit in south Texas, USA. Herpetological research in the area, as well as frequent visits from amphibian and reptile enthusiasts, have helped to form a more complete understanding of amphibian and reptile distributions across the region. However, gaps in the recognized distribution of many species remain. Efforts to better document species occurrence are confounded by the lack of public land and the fact that most of south Texas is privately owned, making access to suitable habitat difficult (Schmidly et al. 2001)

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Coral Reefs In The Gulf Of Mexico Large Marine Ecosystem: Conservation Status, Challenges, And Opportunities, Diego L. Gil-Agudelo, Carlos E. Cintra-Buenrostro, Jorge Brenner, Patricia Gonzalez-Diaz, William Kiene, Caitlin Lustic, Horacio Perez-Espana Jan 2020

Coral Reefs In The Gulf Of Mexico Large Marine Ecosystem: Conservation Status, Challenges, And Opportunities, Diego L. Gil-Agudelo, Carlos E. Cintra-Buenrostro, Jorge Brenner, Patricia Gonzalez-Diaz, William Kiene, Caitlin Lustic, Horacio Perez-Espana

School of Earth, Environmental, & Marine Sciences Faculty Publications

The importance of coral reefs (CR) within marine ecosystems has become widely recognized. Although shallow CR are not as abundant in the Gulf of Mexico (GoM) as in other areas such as the Caribbean, their uniqueness, singularity, isolation, and conservation status make their conservation highly important. Corals and CR, both shallow and deep, are more widely distributed throughout the GoM than previously thought, providing new venues of research but also new challenges for their sustainable management. They are widely present in the three countries circumscribing the GoM (Cuba, Mexico, and the United States). Corals are also distributed throughout different depths, …

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Architectonica Karsteni Rutsch, 1934 (Gastropoda: Architectonicidae) In Seamounts Of The Nazca-Desventuradas Marine Park: First Evidence Of An Extant Population In Chilean Waters Since The Miocene, Cynthia M. Asorey, Javier Sellanes, Erin E. Easton, Rüdiger Bieler, Ariadna Mecho Jan 2020

Architectonica Karsteni Rutsch, 1934 (Gastropoda: Architectonicidae) In Seamounts Of The Nazca-Desventuradas Marine Park: First Evidence Of An Extant Population In Chilean Waters Since The Miocene, Cynthia M. Asorey, Javier Sellanes, Erin E. Easton, Rüdiger Bieler, Ariadna Mecho

School of Earth, Environmental, & Marine Sciences Faculty Publications

The presence of Architectonicidae in Chile was previously recorded only from fossil material of eight species present during the Lower Miocene, when Architectonica karsteni had a geographic range that extended from Costa Rica to central Chile (34°S). No evidence of the presence of the family in Chile after the Lower Miocene have been reported. As part of this study, we report the discovery of A. karsteni at four seamountsat ~200 m water depth in the recently created Nazca-Desventuradas Marine Park, located ~900 km west of continental Chile. Morphological identification was based on protoconch diameter, coloration patterns, and teleoconch sculpture. We …

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Effects Of Integrated Application Of Plant-Based Compost And Urea On Soil Food Web, Soil Properties, And Yield And Quality Of A Processing Carrot Cultivar, A. Habteweld, D. Brainard, A. Kravchencko, Parwinder Grewal, H. Melakeberhan Jan 2020

Effects Of Integrated Application Of Plant-Based Compost And Urea On Soil Food Web, Soil Properties, And Yield And Quality Of A Processing Carrot Cultivar, A. Habteweld, D. Brainard, A. Kravchencko, Parwinder Grewal, H. Melakeberhan

School of Earth, Environmental, & Marine Sciences Faculty Publications

Soil nutrient management system characterized by reduced input of inorganic fertilizers integrated with organic amendments is one of the alternatives for reducing deleterious environmental impact of synthetic fertilizers, suppressing soil-borne pests and diseases, and improving soil health and crop yield. A hypothesis of the present study was that lower rates of urea mixed with higher rates of plant compost (PC) would improve nematode community structure, soil food web condition, soil biological, and physiochemical properties, and yield and quality of a processing carrot (Daucus carota) cultivar. Urea and PC were each applied at 135kg nitrogen (N)/ha alone or at 3:1, 1:1, …

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Mitochondrial Genomes And Genetic Structure Of The Kemp's Ridley Sea Turtle (Lepidochelys Kempii), Hilary R. Frandsen, Diego F. Figueroa, Jeff A. George Jan 2020

Mitochondrial Genomes And Genetic Structure Of The Kemp's Ridley Sea Turtle (Lepidochelys Kempii), Hilary R. Frandsen, Diego F. Figueroa, Jeff A. George

School of Earth, Environmental, & Marine Sciences Faculty Publications

The Kemp's ridley (Lepidochelys kempii) is the world's most endangered sea turtle species and is primarily distributed in the Gulf of Mexico. In the United States, South Padre Island, Texas serves as a key nesting ground for the species. Genetic studies of the Kemp's ridley have been used to aid in conservation and management practices, with the mitochondrial control region as the most commonly used marker due to its perceived hypervariability and ease of sequencing. However, with the advent of next generation sequencing technology, targeting complete mitochondrial genomes is now feasible. Here, we describe a more complete mitochondrial genome for …

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The International Joint Commission And Air Pollution: A Tale Of Two Cases, Owen Temby, Don Munton Jan 2020

The International Joint Commission And Air Pollution: A Tale Of Two Cases, Owen Temby, Don Munton

School of Earth, Environmental, & Marine Sciences Faculty Publications

No abstract provided.

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Black Finesse Amidst The Political Science Paradigm: A Race-Grounded Phenomenology, Janiece Zalina Mackey Jan 2020

Black Finesse Amidst The Political Science Paradigm: A Race-Grounded Phenomenology, Janiece Zalina Mackey

Electronic Theses and Dissertations

In this research, I develop a methodology that I call Race-Grounded Phenomenology (RGP). The scope of this study investigates how Black undergraduate students navigate the discipline of political science. An eclectic array of critical theories of race unveil the ways in which Black undergraduate students exhibit flair and tenacity, or what I call Black Finesse. The eclectic array of critical theories of race utilized in this study include critical race theory, critical whiteness studies, and identity enactments. However, this study focuses on the Black student experience amidst the socialization of political science or what I call the political science paradigm. …

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Perfect 2-Colorings Of The Grassmann Graph Of Planes, Stefaan Dewinter, Klaus Metsch Jan 2020

Perfect 2-Colorings Of The Grassmann Graph Of Planes, Stefaan Dewinter, Klaus Metsch

Michigan Tech Publications, Part 1

We construct an infinite family of intriguing sets, or equivalently perfect 2-colorings, that are not tight in the Grassmann graph of planes of PG(n, q), n ≥ 5 odd, and show that the members of the family are the smallest possible examples if n ≥ 9 or q ≥ 25.

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The Potential Impact Of Nuclear Conflict On Ocean Acidification, Nicole S. Lovenduski, Cheryl S. Harrison, Holly Olivarez, Charles G. Bardeen, Owen B. Toon, Joshua Coupe, Alan Robock, Tyler Rohr, Samantha Stevenson Jan 2020

The Potential Impact Of Nuclear Conflict On Ocean Acidification, Nicole S. Lovenduski, Cheryl S. Harrison, Holly Olivarez, Charles G. Bardeen, Owen B. Toon, Joshua Coupe, Alan Robock, Tyler Rohr, Samantha Stevenson

School of Earth, Environmental, & Marine Sciences Faculty Publications

We demonstrate that the global cooling resulting from a range of nuclear conflict scenarios would temporarily increase the pH in the surface ocean by up to 0.06 units over a 5-year period, briefly alleviating the decline in pH associated with ocean acidification. Conversely, the global cooling dissolves atmospheric carbon into the upper ocean, driving a 0.1 to 0.3 unit decrease in the aragonite saturation state (Ωarag) that persists for ∼10 years. The peak anomaly in pH occurs 2 years post conflict, while the Ωarag anomaly peaks 4- to 5-years post conflict. The decrease in Ωarag would exacerbate a primary threat …

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Ants Increase Cloverworm Herbivory Via Nonconsumptive Pathways, Hannah J. Penn, Kacie J. Athey Jan 2020

Ants Increase Cloverworm Herbivory Via Nonconsumptive Pathways, Hannah J. Penn, Kacie J. Athey

School of Earth, Environmental, & Marine Sciences Faculty Publications

Generalist arthropod predators often exhibit a range of intraguild interactions reducing their potential efficacy as biological control agents. These interactions may include consumptive or nonconsumptive effects that mediate the impacts of herbivores. We examined interactions among 2 generalist predators, the striped lynx spider (Oxyopes salticus Hentz; Araneae: Oxyopidae) and an ant (Lasius neoniger Emery; Hymenoptera: Formicidae), and a herbivore, the green cloverworm (Hypena scabra F.; Lepidoptera: Erebidae), all prevalent in central Kentucky soybean agroecosystems. We hypothesized that individual predator treatments would reduce green cloverworm survival and resultant leaf damage, but that predators would interfere with each other when both were …

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Testing Gene-Environment Interactions For Rare And/Or Common Variants In Sequencing Association Studies., Zihan Zhao, Jianjun Zhang, Qiuying Sha, Han Hao Jan 2020

Testing Gene-Environment Interactions For Rare And/Or Common Variants In Sequencing Association Studies., Zihan Zhao, Jianjun Zhang, Qiuying Sha, Han Hao

Michigan Tech Publications, Part 1

The risk of many complex diseases is determined by a complex interplay of genetic and environmental factors. Advanced next generation sequencing technology makes identification of gene-environment (GE) interactions for both common and rare variants possible. However, most existing methods focus on testing the main effects of common and/or rare genetic variants. There are limited methods developed to test the effects of GE interactions for rare variants only or rare and common variants simultaneously. In this study, we develop novel approaches to test the effects of GE interactions of rare and/or common risk, and/or protective variants in sequencing association studies. We …

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A Comparison Of High-End Methods For Topographic Modelling Of A Coastal Dune Complex, Chen Suo, Eugene Mcgovern, Alan Gilmer, Conor Cahalane Jan 2020

A Comparison Of High-End Methods For Topographic Modelling Of A Coastal Dune Complex, Chen Suo, Eugene Mcgovern, Alan Gilmer, Conor Cahalane

Articles

In recent years, increasing tourism and development in the coastal dune area of the South East of Ireland have resulted in greater pressure on the environment, resulting in issues including soil erosion, flooding and habitat loss. Topographic mapping across a dune field is important for the development of targeted land management actions that maintain biodiversity and ecological functions. Developments in surveying technology, including LiDAR, terrestrial laser scanners (TLS) and aerial surveying from Remotely Piloted Aircraft Systems (RPAS), have enabled high-resolution and high-accuracy spatial data to be gathered quickly and relatively easily for 3D topographic modelling of a coastal dune complex. …

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Primal-Dual 2-Approximation Algorithm For The Monotonic Multiple Depot Heterogeneous Traveling Salesman Problem, S. Rathinam, R. Ravi, J. Bae, K. Sundar Jan 2020

Primal-Dual 2-Approximation Algorithm For The Monotonic Multiple Depot Heterogeneous Traveling Salesman Problem, S. Rathinam, R. Ravi, J. Bae, K. Sundar

Michigan Tech Publications, Part 1

We study a Multiple Depot Heterogeneous Traveling Salesman Problem (MDHTSP) where the cost of the traveling between any two targets depends on the type of the vehicle. The travel costs are assumed to be symmetric, satisfy the triangle inequality, and are monotonic, i.e., the travel costs between any two targets monotonically increases with the index of the vehicles. Exploiting the monotonic structure of the travel costs, we present a 2-approximation algorithm based on the primal-dual method.

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Smart Green Communication Protocols Based On Several-Fold Messages Extracted From Common Sequential Patterns In Uavs, Iván García-Magariño, Geraldine Gray, Raquel Lacuesta, Jaime Lloret Jan 2020

Smart Green Communication Protocols Based On Several-Fold Messages Extracted From Common Sequential Patterns In Uavs, Iván García-Magariño, Geraldine Gray, Raquel Lacuesta, Jaime Lloret

Articles

Green communications can be crucial for saving energy in UAVs and enhancing their autonomy. The current work proposes to extract common sequential patterns of communications to gather each common pattern into a single several- fold message with a high-level compression. Since the messages of a pattern are elapsed from each other in time, the current approach performs a machine learning approach for estimating the elapsed times using off-line training. The learned predictive model is applied by each UAV during flight when receiving a several-fold compressed message. We have explored neural networks, linear regression and correlation analyses among others. The current …

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Gamification Applied To Faculty Professional Development: A Case Study, Scott Wesley Vann Jan 2020

Gamification Applied To Faculty Professional Development: A Case Study, Scott Wesley Vann

Electronic Theses and Dissertations Archive

The purpose of this qualitative case study was to examine online faculty perceptions of engagement within a gamified professional development course at a large urban research university. Over the last decade, gamification has been a trending topic in education because it allows learners an opportunity for contextualized and engaged learning by applying game-thinking to solve problems. Research has shown a direct link between increased levels of engagement when gamification elements such as badging, leaderboards, leveling, etc. are introduced into online learning environments. Currently, literature on the use of gamification is focused on learners in secondary and post-secondary learning institutions and …

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Random Effects Volatility Models For Joint Returns Within A Financial Market, Robert Vaughn Jan 2020

Random Effects Volatility Models For Joint Returns Within A Financial Market, Robert Vaughn

Electronic Theses and Dissertations Archive

Volatility of stocks is one of the most important factors in decision making by stock traders. It is usually manifested by large sudden fluctuations in stock prices and interspersed with short periods of price stability. It constitutes a critical factor in the decision to sell or buy, with the shrewd investor reaping great returns when the risk posed by volatility, high or low, is correctly harnessed in the decision making. As can be expected due to a common shock to the market such as COVID-19, volatilities of stocks within industry are statistically correlated. A shock in terms of price increase …

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Optogenetic Guide Rna Production For Spatiotemporal Regulation Of Crispr/Cas Systems, Diego Augusto Velasquez Pulgarin Jan 2020

Optogenetic Guide Rna Production For Spatiotemporal Regulation Of Crispr/Cas Systems, Diego Augusto Velasquez Pulgarin

Electronic Theses and Dissertations Archive

Spatiotemporal organization and regulation of genomic and epigenomic processes is a phenomenon central to life. The pursuit of knowledge about these processes often requires specialized tools to be able to dissect biological mechanisms. CRISPR/Cas has emerged as a powerful tool for genome engineering, and has seen widespread use. Coupling CRISPR/Cas systems with tools that allow for spatiotemporal control is predicted to be transformational to the ability to perturb systems and gain the insights necessary to understand a diverse set of biological questions, and ultimately treat some of the most pervasive and elusive diseases. This dissertation describes the development of an …

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Addressing Educational Information And Communication Technology Integration Barriers In 1:1 Schools, Anecia J. Warren Jan 2020

Addressing Educational Information And Communication Technology Integration Barriers In 1:1 Schools, Anecia J. Warren

Electronic Theses and Dissertations Archive

Research has indicated that more schools have increased their efforts to transform traditional classrooms into innovative 21st century learning environments. Some schools have even gone as far as implementing one-to-one digital learning environments. However, technology integration in education has been a slow transformational process, and studies have demonstrated that there are numerous barriers educators encounter along the way. The purpose of this study was to examine the first- and second-order barriers to Educational and Communication Technologies (ECTs) teachers???? experience in a 1:1 middle school learning environment. The perspectives of middle school educators who participated in this research study were examined. …

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A Seismologic Study Of The Northern Mississippi Embayment, Yang Yang Jan 2020

A Seismologic Study Of The Northern Mississippi Embayment, Yang Yang

Electronic Theses and Dissertations Archive

Part 1: Crustal structure in the New Madrid Seismic Zone (NMSZ) is investigated through a detailed study of explosion data obtained from the Embayment Seismic Excitation Experiment. The data show a distinct anisotropy in distance attenuation for both P and S waves in the range from 0 to 200km distance. Waves that propagate northward from the 1,134kg Marked Tree, Arkansas, explosion attenuate quickly with distance until a range of about 100km from the source where high-amplitude, high-phase velocity critical reflections from the boundary between the middle crust and rift pillow structure produce high amplitude waves. Propagation southward from the 2,268kg …

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Security Assessment Framework For The Internet Of Medical Things Solutions, Faisal Sultan Alsubaei Jan 2020

Security Assessment Framework For The Internet Of Medical Things Solutions, Faisal Sultan Alsubaei

Electronic Theses and Dissertations Archive

The emergence of the Internet of Medical Things (IoMT) has introduced a monumental change in facilitating the management of diseases, improving disease diagnosis and treatment methods, and reducing healthcare cost and errors. In fact, having several connected devices at each bed is currently the norm in most hospitals in the United States of America. IoMT solutions are not limited to hospital devices alone: IoMT solutions for outpatients, such as over-the-counter and in-home medical devices, are becoming increasingly prevalent. This change has greatly impacted the quality of healthcare for both patients and all frontline healthcare workers.However, the IoMT is far from …

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Direct Metal Laser Sintering Of Ti-6al-4v Alloy: Process-Property-Geometry Empirical Modeling And Optimization, Behzad Fotovvati Jan 2020

Direct Metal Laser Sintering Of Ti-6al-4v Alloy: Process-Property-Geometry Empirical Modeling And Optimization, Behzad Fotovvati

Electronic Theses and Dissertations Archive

Direct metal laser sintering (DMLS) is a widely used powder bed fusion (PBF) additive manufacturing (AM) technology that offers extensive capabilities to fabricate complex metallic components. In the DMLS process, part fabrication involves small moving melt-pools formed by the interaction of laser beam and metal powders. The formation of a melt-pool and subsequently its rapid solidification results in alteration of properties and microstructure of the product. Therefore, understanding and predicting relationships between DMLS process parameters and melt-pool characteristics is critical to control and improve the properties of parts. The melt-pool formation in this process is very similar to what occurs …

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Unique Maximal Ideal In The Algebra L (( L_Q)_C_0 ) With 1 < Q , Diego Calle Cadavid Jan 2020

Unique Maximal Ideal In The Algebra L (( L_Q)_C_0 ) With 1 < Q , Diego Calle Cadavid

Electronic Theses and Dissertations Archive

An important problem in Banach space theory since the 1950s has been the study of the structure of closed algebraic ideals in the algebra L (X ) where X is a Banach space.The Banach spaces X for which that structure is well-known are very few. It is known that every non-zero ideal in L (X ) contains the ideal of all finite-rank operators on X and that if X has a Schauder basis every non-zero closed ideal in L (X ) contains the ideal of all compact operators on X.In this dissertation I study the structure of the space (l_q)_c_0, …

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