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Application Of Passive Air Samplers For Atmospheric Research, And Determination Of Metals In Tree Rings And Marine Sapropel By Icp-Ms, Byunggwon Jeon Jan 2021

Application Of Passive Air Samplers For Atmospheric Research, And Determination Of Metals In Tree Rings And Marine Sapropel By Icp-Ms, Byunggwon Jeon

Electronic Theses and Dissertations

This research focuses on studies of atmospheric mercury (Hg) using passive air samplers (PAS) and studies of trace elements in tree cores and sediment using inductively coupled plasma mass spectrometry (ICP-MS). Mercury is a toxic element that is dispersed globally through the atmosphere. Accurately measuring airborne Hg concentrations aids understanding of the pollutant’s sources, distribution, cycling, and trends. Mercury PAS are designed to capture gaseous elemental mercury (GEM) at a known rate. Compared to active air sampling the low-cost of PAS allows for greater spatial coverage. We used a commercially available Hg PAS (MerPAS®) and observed differences in GEM between …


Electromagnetic Survey Design Using Artifical Neural Networks, Shariful Islam Sharif Jan 2021

Electromagnetic Survey Design Using Artifical Neural Networks, Shariful Islam Sharif

Electronic Theses and Dissertations

Acquiring geophysical information requires selection of the geophysical method based upon the defining physical property and a survey design with adequate resolution but cost effective based upon the size of the area to be surveyed. The objective of this study is to use artificial neural nets (ANNs) to design an optimal survey. The developed approach is tested for the case of soil pipe surveying using electromagnetics. Soil pipes are tortuous voids located within 1.5 m depth of the ground surface. They trend perpendicular to the slope and have cross-sectional dimensions on the order of millimeters to tens of centimeters. The …


Nonreciprocity Applications In Acoustics And Microfluidic Systems, Masoud Naghdi Jan 2021

Nonreciprocity Applications In Acoustics And Microfluidic Systems, Masoud Naghdi

Electronic Theses and Dissertations

Breaking reciprocity in linear acoustic systems and designing a novel actuator for the nonreciprocal valveless pumps are studied in this dissertation. The first part was started by deriving the acoustic governing equations in a moving wave propagation medium. It was shown thatthe Coriolis acceleration term appears ina cross-product term with the wave vector. It means the main reason for breaking reciprocity in the circular fluid flow is the Coriolis acceleration term. Finally, the governing equations were solved numerically by COMSOL Multiphysics software. Moreover, Green`s second identity was used as a complimentary method to prove breaking reciprocityin such a system with …


Applications Of Hot-Melt Extrusion (Hme) Technology And Investigation Of A Screening Tool For Hme, Gauri Deepak Shadambikar Jan 2021

Applications Of Hot-Melt Extrusion (Hme) Technology And Investigation Of A Screening Tool For Hme, Gauri Deepak Shadambikar

Electronic Theses and Dissertations

Hot-melt extrusion (HME), an adaptable technology, has established its position in manufacturing operations like amorphous solid dispersions, immediate and controlled oral formulations, implants and taste masked products. In recent years the industrial focus has shifted towards continuous manufacturing, thus HME is being explored for new applications. The aim of this research was to investigate the novel applications of HME by carrying out an in-depth study to understand the interaction between the process and product and to investigate a screening tool for its small-scale formulation and development.As HME consumes large amount of samples during the developmental phase, we investigated a screening …


Kindergarten Readiness Through The Lens Of Parent Perspective, Ashley Barrows Goralczyk Jan 2021

Kindergarten Readiness Through The Lens Of Parent Perspective, Ashley Barrows Goralczyk

Electronic Theses and Dissertations

This study utilized a phenomenological approach to explore parent perspectives about kindergarten readiness. Semi-structured interviews were conducted with 10 parents from a public preschool whose children were about to start kindergarten. The parents’ own kindergarten experiences were discussed as well as their perspectives and beliefs about what kindergarten readiness means as it relates to the preparation for and transition into kindergarten. Interview transcripts were analytically coded resulting in findings that were authentic and specific related to personal kindergarten recollections, kindergarten preparedness practices, and assumptions about preschool used as a kindergarten preparation tool. Findings answered the research questions providing specificity about …


On The Variance In Selberg’S Central Limit Theorem Dissertation, Meghann Moriah Lugar Jan 2021

On The Variance In Selberg’S Central Limit Theorem Dissertation, Meghann Moriah Lugar

Electronic Theses and Dissertations

Number theorists have made great progress in understanding the distribution of the prime numbers by studying properties of the Riemann zeta-function. A celebrated and classical result of Selberg is that the real and imaginary parts of the logarithm of Riemann zeta-function are normally distributed on the critical line. Selberg proved this using the method of moments. It is known that any model of the logarithm of the Riemann zeta-function near the critical line requires input from the primes and the zeros of the zeta function. We refine Selberg's calculation for the variance of the real part of the logarithm of …


Analysis Of Trends And Effects Of Lifestyle Behaviors Related To Obesity Among Older Adults: Findings From The National Health And Nutrition Examination Survey (Nhanes) Between 2005-2018, Xi Jin Jan 2021

Analysis Of Trends And Effects Of Lifestyle Behaviors Related To Obesity Among Older Adults: Findings From The National Health And Nutrition Examination Survey (Nhanes) Between 2005-2018, Xi Jin

Electronic Theses and Dissertations

Obesity in older adults is a public health challenge in the United States and many regions of the world. This study analyzed data from the National Health and Nutrition Examination Survey (NHANES) ranging between 2005-2006 to 2017-2018 to examine associations between lifestyle behaviors and obesity, and identify trends and contributions of lifestyle behaviors in older adults. A total of 5,812 participants in a body mass index (BMI)- based obesity group and 5,655 participants in a waist circumference (WC)-based obesity group were selected for association and trend analyses. Logistic regression was applied to estimate the associations between lifestyle behaviors and obesity. …


Can Nostalgia Defend Against Stereotype Threat?, Justin Leroy Thibault-Anderson Jan 2021

Can Nostalgia Defend Against Stereotype Threat?, Justin Leroy Thibault-Anderson

Electronic Theses and Dissertations

Stereotype threat causes individuals to perform worse on tasks when they are made aware of a task-relevant negative stereotype for a group to which they belong. Prior research has demonstrated that this effect has been alleviated by using a number of methods including changing test context or bolstering the stereotyped group. One method of bolstering the threatened group is through a self-affirmation of preferred character traits. Nostalgia is a sentimental longing for the past, which has been shown to provide many benefits to an individual, both personally and socially. Research has shown that when told to recall a nostalgic memory, …


Dynamic Characterization Of Bio-Inspired Functionally Graded Polymer Infused Metallic Foams For Blast And Impact Hazard Mitigation, Damian Stoddard Jan 2021

Dynamic Characterization Of Bio-Inspired Functionally Graded Polymer Infused Metallic Foams For Blast And Impact Hazard Mitigation, Damian Stoddard

Electronic Theses and Dissertations

Current vehicular crashworthy systems and body armor designs are effective in protecting personnel and equipment from disaster due to their energy absorbing characteristics. However, little is understood about how to replicate naturally occurring designs through man-made techniques, and the role of functional grading to further improve the performance of such protective systems. This research investigates an advanced material system analogous to a bio-inspired functionally graded material that will serve as a protective system for the mitigation of dynamic events such as low-velocity impact and/or blast loading.


Top Ole Miss News Stories Of 2020, Staff Report Dec 2020

Top Ole Miss News Stories Of 2020, Staff Report

University of Mississippi News

Year-end review showcases highlights, achievements across UM


Search For Lepton-Number- And Baryon-Number-Violating Tau Decays At Belle, D. Sahoo, G. B. Mohanty, K. Trabelsi, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, V. Babu, S. Bahinipati, P. Behera, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin Dec 2020

Search For Lepton-Number- And Baryon-Number-Violating Tau Decays At Belle, D. Sahoo, G. B. Mohanty, K. Trabelsi, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, V. Babu, S. Bahinipati, P. Behera, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin

Faculty and Student Publications

© 2020 authors. Published by the American Physical Society. We search for lepton-number- and baryon-number-violating decays τ-→p¯e+e-, pe-e-, p¯e+μ-, p¯e-μ+, p¯μ+μ-, and pμ-μ- using 921 fb-1 of data, equivalent to (841±12)×106 τ+τ- events, recorded with the Belle detector at the KEKB asymmetric-energy e+e- collider. In the absence of a signal, 90% confidence-level upper limits are set on the branching fractions of these decays in the range (1.8-4.0)×10-8. We set the world's first limits on the first four channels and improve the existing limits by an order of magnitude for the last two channels.


1. Test Data, Zhiqu Lu, Likun Zhang, Lei Cao Dec 2020

1. Test Data, Zhiqu Lu, Likun Zhang, Lei Cao

Gulf Research Program Data Sets

This data set contains recorded and processed bubble sounds under different conditions: a few bubbles vs. constant flow bubbles. Each condition is tested with nitrogen and with methane.


2. Modeling, Zhiqu Lu, Likun Zhang, Lei Cao Dec 2020

2. Modeling, Zhiqu Lu, Likun Zhang, Lei Cao

Gulf Research Program Data Sets

This data set contains the results for acoustic bubble modeling.


3. Localization, Zhiqu Lu, Likun Zhang, Lei Cao Dec 2020

3. Localization, Zhiqu Lu, Likun Zhang, Lei Cao

Gulf Research Program Data Sets

This data set contains the results for oil leakage source localization.


4. Metadata Files, Zhiqu Lu, Likun Zhang, Lei Cao Dec 2020

4. Metadata Files, Zhiqu Lu, Likun Zhang, Lei Cao

Gulf Research Program Data Sets

This data set contains all ReadMe files for test data, modeling data, and localization data, as well as the corresponding codes.


5. Programs And Algorithms, Zhiqu Lu, Likun Zhang, Lei Cao Dec 2020

5. Programs And Algorithms, Zhiqu Lu, Likun Zhang, Lei Cao

Gulf Research Program Data Sets

This data set contains all codes for the study.


6. Supplemental Materials, Zhiqu Lu, Likun Zhang, Lei Cao Dec 2020

6. Supplemental Materials, Zhiqu Lu, Likun Zhang, Lei Cao

Gulf Research Program Data Sets

This data set contains all conference presentations, manuscripts, technical reports, posters.


Vol. 9, No. 1 (2004): Full Issue, Journal Editors Dec 2020

Vol. 9, No. 1 (2004): Full Issue, Journal Editors

Journal X

No abstract provided.


Bordering The Subjunctive In Thomas Pynchon's Mason & Dixon, Adam Lifshey Dec 2020

Bordering The Subjunctive In Thomas Pynchon's Mason & Dixon, Adam Lifshey

Journal X

No abstract provided.


If You Can Get A Sue, Get A Sue': Keiser Retires From Um, Michael Newsom Dec 2020

If You Can Get A Sue, Get A Sue': Keiser Retires From Um, Michael Newsom

University of Mississippi News

Assistant to the chancellor looks back at storied Ole Miss career


Manuel Tolsa's Equestrian Portrait Of Charles Iv: Art History, Patrimony, And The City, Stacie G. Widdifield Dec 2020

Manuel Tolsa's Equestrian Portrait Of Charles Iv: Art History, Patrimony, And The City, Stacie G. Widdifield

Journal X

No abstract provided.


This Side Of The Misty Sea, Where Wynken, Blynken And Nod Saw Off The Kitty’S Tale, A. Loudermilk Dec 2020

This Side Of The Misty Sea, Where Wynken, Blynken And Nod Saw Off The Kitty’S Tale, A. Loudermilk

Journal X

No abstract provided.


Vol. 1, No. 1 (Autumn 1996): Full Issue, Journal Editors Dec 2020

Vol. 1, No. 1 (Autumn 1996): Full Issue, Journal Editors

Journal X

No abstract provided.


Hejinian Meditations: Lives Of The Cell, John Shoptaw Dec 2020

Hejinian Meditations: Lives Of The Cell, John Shoptaw

Journal X

No abstract provided.


Editor's Preface, Journal Editors Dec 2020

Editor's Preface, Journal Editors

Journal X

No abstract provided.


Chemistry Chair Elected As Fellow Of Prestigious Science Association, Shea Stewart Dec 2020

Chemistry Chair Elected As Fellow Of Prestigious Science Association, Shea Stewart

University of Mississippi News

Greg Tschumper earns rank with American Association for the Advancement of Science


More Than Dollars And Cents: Larry Sparks Looks Forward To Retirement, Edwin B. Smith Dec 2020

More Than Dollars And Cents: Larry Sparks Looks Forward To Retirement, Edwin B. Smith

University of Mississippi News

After 23 years, UM vice chancellor for administration and finance plans to travel and visit family


Controlling The Chaotic Motions Of An Airfoil With A Nonlinear Stiffness Using Closed-Loop Harmonic Parametric Excitation, Robert Bruce Alstrom Dec 2020

Controlling The Chaotic Motions Of An Airfoil With A Nonlinear Stiffness Using Closed-Loop Harmonic Parametric Excitation, Robert Bruce Alstrom

Faculty and Student Publications

The purpose of this research is to conduct a preliminary investigation into the possibility of suppressing the flutter and post-flutter (chaotic) responses of a two-dimensional self-excited airfoil with a cubic nonlinear stiffness (in torsion) and linear viscous damping via closed-loop harmonic parametric excitation. It was found that the initial configuration of the proposed control scheme caused the torsional/pitch dynamics to act as a nonlinear energy sink; as a result, it was identified that the mechanisms of vibration suppression are the resonance capture cascade and the short duration or isolated resonance capture. It is the isolated resonance capture that is responsible …


Search For A Doubly Charged Ddk Bound State In ϒ (1s, 2s) Inclusive Decays And Via Direct Production In E+E- Collisions At S =10.520, 10.580, And 10.867 Gev Search For A Doubly Charged Ddk Bound State In ... Li Y. Et Al., Y. Li, S. Jia, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. J. Cho Dec 2020

Search For A Doubly Charged Ddk Bound State In ϒ (1s, 2s) Inclusive Decays And Via Direct Production In E+E- Collisions At S =10.520, 10.580, And 10.867 Gev Search For A Doubly Charged Ddk Bound State In ... Li Y. Et Al., Y. Li, S. Jia, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. J. Cho

Faculty and Student Publications

© 2020 authors. Published by the American Physical Society. We report the results of a first search for a doubly charged DDK bound state, denoted the R++, in ϒ(1S) and ϒ(2S) inclusive decays and via direct production in e+e- collisions at s=10.520, 10.580, and 10.867 GeV. The search uses data accumulated with the Belle detector at the KEKB asymmetric-energy e+e- collider. No significant signals are observed in the D+Ds∗+ invariant-mass spectra of all studied modes. The 90% credibility level upper limits on their product branching fractions in ϒ(1S) and ϒ(2S) inclusive decays (B(ϒ(1S, 2S)→R+++anything)×B(R++→D+Ds∗+)), the product values of Born cross …


New Method For Beyond The Standard Model Invisible Particle Searches In Tau Lepton Decays, E. De La Cruz-Burelo, A. De Yta-Hernandez, M. Hernandez-Villanueva Dec 2020

New Method For Beyond The Standard Model Invisible Particle Searches In Tau Lepton Decays, E. De La Cruz-Burelo, A. De Yta-Hernandez, M. Hernandez-Villanueva

Faculty and Student Publications

Motivated by models proposed to explain Standard Model anomalies, and the unprecedented τ+τ- data to be collected by the Belle II experiment during the next years, we study the kinematics of tau pair decays and propose a new method to search for lepton flavor violating processes in tau lepton decays to invisible beyond Standard Model particles, such as τ→ℓα, where ℓ is either an electron or a muon, and α is a massive particle that escapes undetected. The new method improves by one order of magnitude the expected upper limit on the τ→ℓα production in 3×1 prong tau decays and …