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Articles 31921 - 31950 of 302639
Full-Text Articles in Physical Sciences and Mathematics
Relationship Of Ore Properties And Alteration Of The Büyük Kuluncak (Malatya) Nb - U - Nte - Zr - Li Deposit, Okan Pulat, Mustafa Karakaş, Mehmet Ali Yasti
Relationship Of Ore Properties And Alteration Of The Büyük Kuluncak (Malatya) Nb - U - Nte - Zr - Li Deposit, Okan Pulat, Mustafa Karakaş, Mehmet Ali Yasti
Bulletin of the Mineral Research and Exploration
Rare Earth Elements (REE) + Niobium (Nb) + Uranium (U) + Zircon (Zr) + Lithium (Li) formations are investigated which are related with alkaline Upper Cretaceous - Lower Paleocene Kuluncak Syenitoid that settled by cutting the Kuluncak ophiolite in the north of Kuluncak (Malatya) town. The alkaline magma-related Büyük Kuluncak REE - Nb - U deposit, which is enriched with regard to rare metals (Nb, Zr, and Rb), is the first economic deposit of our country. The deposit formed related to alkaline characterized foid syenite, sodalite syenite, syenite, alkaline feldspar syenite rocks which intruded into Triassic - Lower Cretaceous limestones …
Search For Electroweak Production Of Charginos And Neutralinos In Proton-Proton Collisions At √S = 13 Tev, A. Tumasyan
Search For Electroweak Production Of Charginos And Neutralinos In Proton-Proton Collisions At √S = 13 Tev, A. Tumasyan
Department of Physics and Astronomy: Faculty Publications
A direct search for electroweak production of charginos and neutralinos is presented. Events with three or four leptons, with up to two hadronically decaying τ leptons, or two same-sign light leptons are analyzed. The data sample consists of 137 fb−1 of proton-proton collisions with a center of mass energy of 13TeV, recorded with the CMS detector at the LHC. The results are interpreted in terms of several simplified models. These represent a broad range of production and decay scenarios for charginos and neutralinos. A parametric neural network is used to target several of the models with large backgrounds. In …
The Synthesis And Purification Methodology Of An Intermolecular Pyrophosphate Sensor: Applications For The Quantitative Polymerase Chain Reaction, Ethan Gevedon
Honors Projects
The optimized synthesis and purification methodology for an intermolecular pyrophosphate sensor scaffold molecule was performed: high performance liquid chromatography afforded the scaffold in excellent purity and yield. The applications of the sensor assembly in the quantitative polymerase chain reaction were discussed, and preliminary results show that
Investigating Ionic Current Rectification As A Means Of Controllable Drug Delivery Using Silica Nanoparticles And Nano Porous Membranes, Katie L. Nolan
Investigating Ionic Current Rectification As A Means Of Controllable Drug Delivery Using Silica Nanoparticles And Nano Porous Membranes, Katie L. Nolan
Honors College Theses
This project investigates a novel ionic current rectification (ICR) phenomenon created by the opening and closing of nanopores by charged silica nanoparticles (SNPs) under electrophoretic flow. This voltage-controlled opening and closing of the pores can be exploited to allow delivery of nicotine through the pores at programmable intervals. The ICR phenomenon was thoroughly investigated by varying pH, buffer concentration, SNP concentration, and applied voltage range. The mechanism was also verified by testing with a 2-, 3-, and 5-electrode system. Potential cake layer formation was demonstrated in a longer ICR test, and the implications of this on the drug delivery mechanism …
Synthesis And Characterization Of Alkyne-Functionalized Photo-Cross-Linkable Polyesters, Warrick Ma, Xiaochu Ding, Ying Chen, Yadong Wang
Synthesis And Characterization Of Alkyne-Functionalized Photo-Cross-Linkable Polyesters, Warrick Ma, Xiaochu Ding, Ying Chen, Yadong Wang
Michigan Tech Publications
An alkyne-functionalized elastomer derived from sebacic acid, 1,3-propanediol, and alkyne-functionalized serinol is synthesized via melt condensation. A low-power UV lamp triggers the cross-linking rapidly via thiol-yne click chemistry. The cross-linking behavior is studied by photorheology and NMR spectroscopy. The resultant elastomer possesses mechanical properties similar to those of human soft tissues and exhibits in vitro degradability and good cytocompatibility.
Impact Of Traditional Versus Alternative Assessment On Student Achievement, Beth Lustgarten
Impact Of Traditional Versus Alternative Assessment On Student Achievement, Beth Lustgarten
Honors Projects
The focus of this study looks at the effect of alternative assessment on student achievement in a high school science classroom. Within this action research, students have choices and are able to demonstrate creativity in their alternative assessments. By comparing student results from traditional and alternative assessments, the impact of assessment showed students had an overwhelming preference for completing alternative assessments, and a majority of students did better on the alternative assessment when compared to the traditional assessment.
Hydrolytically Degradable Thermosets With Tunable Degradation Profiles Via Ketal-Based Crosslinks, Benjamin Alameda
Hydrolytically Degradable Thermosets With Tunable Degradation Profiles Via Ketal-Based Crosslinks, Benjamin Alameda
Dissertations
Thermoset polymer networks are ubiquitous in the construction of high-performance materials due to their excellent mechanical properties, solvent resistance, and thermomechanical performance. However, the crosslinked structure that instills these materials with favorable performance also makes them incredibly resistant to degradation and are nearly impossible to recycle – adding to the ever-growing problem of plastic pollution. Hydrolytically degradable thermosets have emerged as a potentially sustainable alternative to traditional thermosets by affording networks that are inherently degradable in aqueous environments. This dissertation focuses on the development of hydrolytically degradable thermoset networks with tunable degradation behavior through the implementation of ketal-based crosslinks. Given …
Unknowable Truths: The Incompleteness Theorems And The Rise Of Modernism, Caroline Tvardy
Unknowable Truths: The Incompleteness Theorems And The Rise Of Modernism, Caroline Tvardy
Honors Scholars Collaborative Projects
This thesis evaluates the function of the current history of mathematics methodologies and explores ways in which historiographical methodologies could be successfully implemented in the field. Traditional approaches to the history of mathematics often lack either an accurate portrayal of the social and cultural influences of the time, or they lack an effective usage of mathematics discussed. This paper applies a holistic methodology in a case study of Kurt Gödel’s influential work in logic during the Interwar period and the parallel rise of intellectual modernism. In doing so, the proofs for Gödel’s Completeness and Incompleteness theorems will be discussed as …
Lines On A Smooth Projective Surface, Jordan Demoura
Lines On A Smooth Projective Surface, Jordan Demoura
Mathematics & Computer Science Student Scholarship
Jordan DeMoura ’22
Major: Mathematics
Faculty Mentor: Dr. Su-Jeong Kang, Math
This research is to investigate lines on a smooth projective surface. A quadric surface contains two families of planes that provide a ruling of the surface. A cubic surface contains twenty-seven lines, and we provide a complete description of these lines for a Fermat cubic surface. Furthermore, under the Plucker embedding, we show that each family of the lines on a quadric surface corresponds to plane conic curves lying on complementary planes in the projective space of dimension five.
Metal Complexes Of Redox Active Ligands, Alexandra Chaparro, Parker Keller
Metal Complexes Of Redox Active Ligands, Alexandra Chaparro, Parker Keller
Chemistry & Biochemistry Student Scholarship
Alexandra Chaparro ’22, Major: Biochemistry
Parker Keller ’24, Major: Chemistry
Mentor: Dr. Maria Carroll, Chemistry and Biochemistry
Our research focuses on synthesizing and studying the properties of metal complexes that contain redox active ligands. Ligands are molecules or ions that can bind to a metal ion, and this particular class of ligands is interesting because they can either accept or lose electrons. We synthesized zinc complexes, in order to measure the reduction potentials of the ligands, which provide information about the ease with which they accept electrons. We then synthesized iron complexes and determined their structures. These complexes are potentially …
Synthesis, Characterization And Activity Of Palladium Catalysts On The Dual Support Of Cerium And Aluminum Oxides, Jihyeon Park
Synthesis, Characterization And Activity Of Palladium Catalysts On The Dual Support Of Cerium And Aluminum Oxides, Jihyeon Park
Theses and Dissertations
The effects of sequence of impregnation (Pd on cerium oxides -alumina and cerium oxides on Pd-alumina) and calcination temperature (500 ℃ and 850 ℃) on the catalytic oxidation of methane under lean conditions were investigated. The catalysts were prepared by a combination of impregnation, slurry and vortexing methods. The catalysts had 4.7 wt.% Pd and 10.7 wt.% Ce based on inductively coupled plasma optical emission spectrometry (ICP-OES) analysis. The catalysts were characterized by pulse chemisorption, temperature programmed reduction (TPD), scanning transmission electron microscopy (STEM), and X-ray photoelectron spectroscopy (XPS). The activity of the catalysts for methane combustion was measured in …
Using Supervised Learning Algorithms As A Follow-Up Method In The Search Of Gravitational Waves From Core-Collapse Supernovae, Javier M. Antelis, Marco Cavaglia, Travis Hansen, Mannuel D. Morales, Claudia Moreno, Soma Mukherjee, Marek J. Szczepańczyk, Michele Zanolin
Using Supervised Learning Algorithms As A Follow-Up Method In The Search Of Gravitational Waves From Core-Collapse Supernovae, Javier M. Antelis, Marco Cavaglia, Travis Hansen, Mannuel D. Morales, Claudia Moreno, Soma Mukherjee, Marek J. Szczepańczyk, Michele Zanolin
Physics and Astronomy Faculty Publications and Presentations
We present a follow-up method based on supervised machine learning (ML) to improve the performance in the search of gravitational wave (GW) bursts from core-collapse supernovae (CCSNe) using the coherent WaveBurst (cWB) pipeline. The ML model discriminates noise from signal events by using a set of reconstruction parameters provided by cWB as features. Detected noise events are discarded yielding a reduction in the false alarm rate (FAR) and the false alarm probability thus enhancing the statistical significance. We tested the proposed method using strain data from the first half of the third observing run of advanced LIGO, and CCSNe GW …
Collision-Induced Dissociation And Ion Mobility Mass Spectrometry Of Au30(S-Tbu)18 Nanoclusters, Christopher Hood
Collision-Induced Dissociation And Ion Mobility Mass Spectrometry Of Au30(S-Tbu)18 Nanoclusters, Christopher Hood
Honors Theses
Collision Induced Dissociation (CID) and Ion Mobility Mass Spectrometry (IM-MS) are methods used to understand the structural arrangement and stability of large molecules. In this study, the gold nanocluster Au30(S-tBu)18 was dissociated at varying Trap collision energies, and drift time vs mass spectrometry data was plotted to determine the order of cluster fragmentation. Comparing Au30(S-tBu)18 data to that of Au25(SCH2CH2Ph)18, the only current nanocluster published with IM-MS data, two distinctly different dissociation patterns were seen. Unlike the linear CID fragmentation of Au …
The Effects Copper Has On Casting Glass, K. Malika Haver
The Effects Copper Has On Casting Glass, K. Malika Haver
Honors Projects
The aim of this honors project was to discern the difference between how various types of copper reacted with glass. The two disciplines that were connected were chemistry and glassblowing. The basic components learned in chemistry were applied to glass with an end goal of a project installation that visualized the discoveries with copper. The glassblowing technique used was lost wax casting, and the two types of copper used were copper foil and fine copper metal powder. The copper was found to turn the glass into various blues with the intensity and darkness of the blues being dependent on the …
The Plant Water Management Experiments, Marc Benjamin Wasserman
The Plant Water Management Experiments, Marc Benjamin Wasserman
Dissertations and Theses
A simple means of watering plants in the low-g environment aboard orbiting spacecraft is not obvious. Since the beginning of spaceflight, numerous approaches have been pursued to water plants that seek to maximize plant viability and system reliability, while minimizing crew time and system complexity. The Plant Water Management experiments (PWM) seek to apply recent advances in low-gravity capillary fluidics to the challenges faced during plant growth operations aboard spacecraft. One primary challenge encountered in such applications is to establish Earth-like flows, minimizing the low-g specific adaptations required by the plants. This is difficult due to the fluid physics challenges …
Towards A Generalization Of Fulton's Intersection Multiplicity Algorithm, Ryan Sandford
Towards A Generalization Of Fulton's Intersection Multiplicity Algorithm, Ryan Sandford
Electronic Thesis and Dissertation Repository
In this manuscript we generalize Fulton's bivariate intersection multiplicity algorithm to a partial intersection multiplicity algorithm in the n-variate setting. We extend this generalization of Fulton's algorithm to work at any point, rational or not, using the theory of regular chains. We implement these algorithms in Maple and provide experimental testing. The results indicate the proposed algorithm often outperforms the existing standard basis-free intersection multiplicity algorithm in Maple, typically by one to two orders of magnitude. Moreover, we also provide some examples where the proposed algorithm outperforms intersection multiplicity algorithms which rely on standard bases, indicating the proposed algorithm is …
On The Geometry Of Multi-Affine Polynomials, Junquan Xiao
On The Geometry Of Multi-Affine Polynomials, Junquan Xiao
Electronic Thesis and Dissertation Repository
This work investigates several geometric properties of the solutions of the multi-affine polynomials. Chapters 1, 2 discuss two different notions of invariant circles. Chapter 3 gives several loci of polynomials of degree three. A locus of a complex polynomial p(z) is a minimal, with respect to inclusion, set that contains at least one point of every solution of the polarization of the polynomial. The study of such objects allows one to improve upon know results about the location of zeros and critical points of complex polynomials, see for example [22] and [24]. A complex polynomial has many loci. It is …
Comparing Polarimetric Signatures Of Proximate Tornadic And Non-Tornadic Supercells In Similar Environments, Devon Healey
Comparing Polarimetric Signatures Of Proximate Tornadic And Non-Tornadic Supercells In Similar Environments, Devon Healey
Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research
While much research has shown that characteristics of the environment surrounding supercells can potentially indicate their likelihood to become tornadic, it is not uncommon for tornadic and non-tornadic supercells to coexist in seemingly similar environments. In these situations, it is difficult operationally to separate tornadic from non-tornadic supercells using environmental observations alone. Given that tornadic and non-tornadic supercells have been found to coexist in similar environments, something must be occurring beneath the observational and/or model gridscale that is supporting tornadogenesis in some supercells while inhibiting it in others. This study examines dual-polarimetric radar signatures of proximate tornadic and non-tornadic supercells …
A Food-Themed Cross-Disciplinary Faculty-Staff Learning Community Enriches Place-Based Experiential Learning Curricula - (Instructor Resource), Julia L. Angstmann, Grant A. Fore, Francesca A. Williamson, Brandon H. Sorge
A Food-Themed Cross-Disciplinary Faculty-Staff Learning Community Enriches Place-Based Experiential Learning Curricula - (Instructor Resource), Julia L. Angstmann, Grant A. Fore, Francesca A. Williamson, Brandon H. Sorge
Scholarship and Professional Work - LAS
This document contains instructional resources to facilitate an 8-month Faculty-Staff Learning Community (FSLC) focused on learning and discussion to support the creation of campus farmsituated place-based experiential learning (PBEL) lessons that inspire place attachment, sustainability meaning making, environmental science literacy, and civic mindedness. The development of this professional development resource is based upon work supported by the National Science Foundation under Grant Nos. DUE-1609219 and DUE-1915313.
Investigation Of The Slaking Behavior Of Weak Geological Units In Terms Of Undercutting Rate, Semiha Özdemi̇r, Zeynal Abiddin Ergüler
Investigation Of The Slaking Behavior Of Weak Geological Units In Terms Of Undercutting Rate, Semiha Özdemi̇r, Zeynal Abiddin Ergüler
Bulletin of the Mineral Research and Exploration
It is aimed in this study to measure the undercutting rate of weak geological units under field conditions and to determine the relationship between this parameter and other indexes and physical properties of related rocks. Thus, 11 different locations in which weak materials were found and undercutting problems were observed in the road slopes were selected. In these road cuts, the undercutting depths in many locations were obtained by measurements taken at different dates from the pins installed in the fresh surface of weak units. In addition, undercutting depth was directly taken by using the amount of erosion between durable …
A Descriptive Pilot Study On Travel Nurses' Risk Of Burnout During The Covid- 19 Pandemic, Lashanda Head
A Descriptive Pilot Study On Travel Nurses' Risk Of Burnout During The Covid- 19 Pandemic, Lashanda Head
ATU Theses and Dissertations 2021 - Present
Burnout is a state of emotional, physical, and mental exhaustion that results from long-term involvement in work situations that are difficult (Schaufeli & Greenglass, 2001). Burnout leads to a significant occupational problem in various professions that involve people who work with others, including nurses who work with COVID- 19 patients. This pilot study aims to determine if travel nurses who have worked or are currently working during the COVID-19 pandemic in acute care hospitals are at increased risk for nurse burnout. A convenience sample (N=9) of travel nurses working at CHRISTUS St Michael Health System were asked to …
Spatial And Temporal Distribution And Habitat Selection Of Native Yellowstone Cutthroat Trout And Nonnative Utah Chub, Darcy K. Mccarrick, Jeffrey C. Dillon, Brett High, Michael C. Quist
Spatial And Temporal Distribution And Habitat Selection Of Native Yellowstone Cutthroat Trout And Nonnative Utah Chub, Darcy K. Mccarrick, Jeffrey C. Dillon, Brett High, Michael C. Quist
United States Geological Survey: Staff Publications
Henrys Lake, Idaho, is a renowned trophy trout fishery that faces an uncertain future following the establishment of Utah Chub (UTC) Gila atraria. Utah Chub were first documented in the lake in 1993 and have become abundant over the past two decades. Little is known about the ecology of UTC, but they typically have negative effects on salmonids in systems where they have been introduced. We sought to fill knowledge gaps in UTC ecology and provide insight on potential interactions with Yellowstone Cutthroat Trout (YCT) Oncorhynchus clarkii bouvieri. Ninety-four YCT and 95 UTC were radio-tagged in spring 2019 …
The World Is Our Classroom: Developing A Model For International Virtual Internships - The Global Innovations Project, Paul Doyle, Brian Keegan, Damian Gordon, Anna Becevel, Paul J. Gibson, Zhiying Jiang Phd, Dympna O'Sullivan
The World Is Our Classroom: Developing A Model For International Virtual Internships - The Global Innovations Project, Paul Doyle, Brian Keegan, Damian Gordon, Anna Becevel, Paul J. Gibson, Zhiying Jiang Phd, Dympna O'Sullivan
Articles
In the aftermath of COVID-19, remote working has become the norm, and graduates now need an even wider range of skills, which traditional classrooms and internships do not always provide. Working in multiple time zones, within global multi-cultural teams, and only ever meeting colleagues through online technology are just some of the challenges, which require a new type of global graduate. Transversal skills including leadership, collaboration, innovation, digital, green, organization and communication skills are critical. The disruption from COVID-19 also presents unprecedented opportunities to develop more inclusive approaches to internships and international experiences, to level the playing field for students …
Analytical Study To Determine Significant Causes Of Increased No-Hitters In The 2021 Major League Baseball Season, Joel Robison
Analytical Study To Determine Significant Causes Of Increased No-Hitters In The 2021 Major League Baseball Season, Joel Robison
Honors Projects
Why were there so many no-hitters in the 2021 MLB season? This project focuses on possible significant causes to the record-breaking number of no-hitters pitched in the 2021 Major League Baseball season. Specifically, this project takes an analytical look at the recent trends in launch angles and spin rates to determine if there are any significant causes to the increased number of no-hitters in baseball. The random nature and unpredictability of the game of baseball make it almost impossible to come to any solid conclusions.
Fighting Food Insecurity In New York City: What Role For Street Trees?, Kristen Cooney
Fighting Food Insecurity In New York City: What Role For Street Trees?, Kristen Cooney
Environment and Sustainability Honors Papers
There is growing recognition that urban forests have the potential to combat food insecurity via their edible parts, namely fruits, berries, and nuts. I researched New York City’s street trees, by locating trees with edible parts within food insecure communities, to analyze this potential.
Urban Forests And Their Potential To Combat Food Insecurity: Analyzing Street Trees In Baltimore, Md For Their Edibility, Victoria Bearden
Urban Forests And Their Potential To Combat Food Insecurity: Analyzing Street Trees In Baltimore, Md For Their Edibility, Victoria Bearden
Environment and Sustainability Honors Papers
Food insecure environments, in which residents lack consistent access to nutritious food materials, can occur in urban settings. Literature on urban forests suggests that trees can provide a range of provisioning ecosystem services, including edible uses. We consider this to determine if street trees in Baltimore, Maryland have the potential to provide nutritious food materials to address food insecurity in Healthy Food Priority Areas (HFPA), designated by Johns Hopkins Center for a Livable Future. Our analysis utilizes the Plants For a Future database and the geospatial hotspot analysis tool in Esri’s ArcMap to determine the edible quality ratings (EQR) of …
Fagus Grandifola (American Beech) Id #971, Shyann Baillargeon
Fagus Grandifola (American Beech) Id #971, Shyann Baillargeon
BIO 140 Arboretum Project
Location: West of McKillop Library
Liriodendron Tulipifera (Tulip Tree) #358, Savannah J. Szamborski
Liriodendron Tulipifera (Tulip Tree) #358, Savannah J. Szamborski
BIO 140 Arboretum Project
No abstract provided.
The Geology Of The Mt. Simon Sandstone Storage Complex At The Wabash #1 Well, Vigo Co., Indiana (Subtask 7.2, Technical Report), Jared T. Freiburg, Franck Delpomdor, John H. Mcbride, Hannes E. Leetaru, David H. Malone, Nate Grigsby, Mansour Khosravi, Scott Frailey, James R. Damico, Charles Monson, Zohreh Askari, Yaghoob Lasemi, Donna Willette, Oladipupo Babarinde, Chris Korose, Mingyue Yu, Lauren Gardiner
The Geology Of The Mt. Simon Sandstone Storage Complex At The Wabash #1 Well, Vigo Co., Indiana (Subtask 7.2, Technical Report), Jared T. Freiburg, Franck Delpomdor, John H. Mcbride, Hannes E. Leetaru, David H. Malone, Nate Grigsby, Mansour Khosravi, Scott Frailey, James R. Damico, Charles Monson, Zohreh Askari, Yaghoob Lasemi, Donna Willette, Oladipupo Babarinde, Chris Korose, Mingyue Yu, Lauren Gardiner
Faculty Publications-- Geography, Geology, and the Environment
The Wabash CarbonSAFE project drilled the Wabash #1 stratigraphic test well (ID# 168045) at the Wabash Valley Resources (WVR) IGCC facility in Vigo County, Indiana, to characterize and evaluate the basal Cambrian Mt. Simon Sandstone for commercial-scale CO2 storage near the site. This report presents an extensive geologic characterization of the Mt. Simon storage complex and relevant data collected from the Wabash #1 well, such as lithologic data collected from cuttings and core, geophysical logging, geomechanical analysis of core samples, and well testing and fluid sampling within the Mt. Simon Sandstone. The Mt. Simon storage complex comprises two major sections: …
Accelerating Serverless Computing By Harvesting Idle Resources, Hanfei Yu, Hao Wang, Jian Li, Xu Yuan, Seung Jong Park
Accelerating Serverless Computing By Harvesting Idle Resources, Hanfei Yu, Hao Wang, Jian Li, Xu Yuan, Seung Jong Park
Computer Science Faculty Research & Creative Works
Serverless computing automates fine-grained resource scaling and simplifies the development and deployment of online services with stateless functions. However, it is still non-trivial for users to allocate appropriate resources due to various function types, dependencies, and input sizes. Misconfiguration of resource allocations leaves functions either under-provisioned or over-provisioned and leads to continuous low resource utilization. This paper presents Freyr, a new resource manager (RM) for serverless platforms that maximizes resource efficiency by dynamically harvesting idle resources from over-provisioned functions to under-provisioned functions. Freyr monitors each function's resource utilization in real-time, detects over-provisioning and under-provisioning, and learns to harvest idle resources …