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Articles 53821 - 53850 of 302616

Full-Text Articles in Physical Sciences and Mathematics

Globally Conservative Solutions For The Modified Camassa–Holm (Moch) Equation, Zhaonan Luo, Zhijun Qiao, Zhaoyang Yin Aug 2021

Globally Conservative Solutions For The Modified Camassa–Holm (Moch) Equation, Zhaonan Luo, Zhijun Qiao, Zhaoyang Yin

School of Mathematical and Statistical Sciences Faculty Publications and Presentations

In this paper, we present the globally conservative solutions to the Cauchy problem for the modified Camassa–Holm (MOCH) equation. First, we transform the equation into an equivalent semi-linear system under new variables. Second, according to the standard ordinary differential equation theory with the aid of the conservation law, we give the global solutions of the semi-linear system. Finally, returning to the original variables, we obtain the globally conservative solutions to the MOCH equation.

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Does Landcare Result In Changes In Perceptions Of Livestock Keepers On Sustainable Use Of Natural Resources? An Example From Sterkspruit In South Africa, W. M. Goqwana, C. Machingura, Z. Mdlulwa, R. Mkhari, O. Mmolaeng, A. O. Selomane Aug 2021

Does Landcare Result In Changes In Perceptions Of Livestock Keepers On Sustainable Use Of Natural Resources? An Example From Sterkspruit In South Africa, W. M. Goqwana, C. Machingura, Z. Mdlulwa, R. Mkhari, O. Mmolaeng, A. O. Selomane

IGC Proceedings (1993-2023)

No abstract provided.

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Developing Tropical Forage Technologies With Farmers In China, Kexian Yi, Jun Tang, Huaxuan He, Hanlin Zhou, Wangliang Xia Aug 2021

Developing Tropical Forage Technologies With Farmers In China, Kexian Yi, Jun Tang, Huaxuan He, Hanlin Zhou, Wangliang Xia

IGC Proceedings (1993-2023)

No abstract provided.

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Farmers' Awareness, Reaction And Livlihood To The Policy Of Returning Cultivated Land And Grazing Land To Grasses In Ningxia, China, Aitao Zhao Aug 2021

Farmers' Awareness, Reaction And Livlihood To The Policy Of Returning Cultivated Land And Grazing Land To Grasses In Ningxia, China, Aitao Zhao

IGC Proceedings (1993-2023)

No abstract provided.

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Duck Hunt: Memory Forensics Of Usb Attack Platforms, Tyler Thomas, Mathew Piscitelli, Bhavik Ashok Nahar, Ibrahim Baggili Aug 2021

Duck Hunt: Memory Forensics Of Usb Attack Platforms, Tyler Thomas, Mathew Piscitelli, Bhavik Ashok Nahar, Ibrahim Baggili

Electrical & Computer Engineering and Computer Science Faculty Publications

To explore the memory forensic artifacts generated by USB-based attack platforms, we analyzed two of the most popular commercially available devices, Hak5's USB Rubber Ducky and Bash Bunny. We present two open source Volatility plugins, usbhunt and dhcphunt, which extract artifacts generated by these USB attacks from Windows 10 system memory images. Such artifacts include driver-related diagnostic events, unique device identifiers, and DHCP client logs. Our tools are capable of extracting metadata-rich Windows diagnostic events generated by any USB device. The device identifiers presented in this work may also be used to definitively detect device usage. Likewise, the DHCP logs …

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Inhibition Of Aminoglycoside 6’-N-Acetyltransferase Type Ib [Aac(6′)-Ib]: Structure-Activity Relationship Of Substituted Pyrrolidine Pentamine Derivatives As Inhibitors, Kenneth Rocha, Jesus Magallon, Craig Reeves, Kimberly Phan, Peter Vu, Crista L. Oakley-Havens, Stella Kwan, Maria S. Ramirez, Travis Lavoi, Haley Donow, Prem Chapagain, Radleigh Santos, Clemencia Pinilla, Marc A. Giulianotti, Marcelo E. Tolmasky Aug 2021

Inhibition Of Aminoglycoside 6’-N-Acetyltransferase Type Ib [Aac(6′)-Ib]: Structure-Activity Relationship Of Substituted Pyrrolidine Pentamine Derivatives As Inhibitors, Kenneth Rocha, Jesus Magallon, Craig Reeves, Kimberly Phan, Peter Vu, Crista L. Oakley-Havens, Stella Kwan, Maria S. Ramirez, Travis Lavoi, Haley Donow, Prem Chapagain, Radleigh Santos, Clemencia Pinilla, Marc A. Giulianotti, Marcelo E. Tolmasky

Mathematics Faculty Articles

The aminoglycoside 6′-N-acetyltransferase type Ib [AAC(6′)-Ib] is a common cause of resistance to amikacin and other aminoglycosides in Gram-negatives. Utilization of mixture-based combinatorial libraries and application of the positional scanning strategy identified an inhibitor of AAC(6′)-Ib. This inhibitor’s chemical structure consists of a pyrrolidine pentamine scaffold substituted at four locations (R1, R3, R4, and R5). The substituents are two S-phenyl (R1 and R4), an S-hydroxymethyl (R3), and a 3-phenylbutyl (R5) groups. Another location, R2, does not have a substitution, but it is named because its stereochemistry was modified in some compounds utilized in this study. Structure-activity …

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Another Brick In The Wall: An Exploratory Analysis Of Digital Forensics Programs In The United States, Syria Mccullough, Stella Abudu, Ebere Onwubuariri, Ibrahim Baggili Aug 2021

Another Brick In The Wall: An Exploratory Analysis Of Digital Forensics Programs In The United States, Syria Mccullough, Stella Abudu, Ebere Onwubuariri, Ibrahim Baggili

Electrical & Computer Engineering and Computer Science Faculty Publications

We present a comprehensive review of digital forensics programs offered by universities across the United States (U.S.). While numerous studies on digital forensics standards and curriculum exist, few, if any, have examined digital forensics courses offered across the nation. Since digital forensics courses vary from university to university, online course catalogs for academic institutions were evaluated to curate a dataset. Universities were selected based on online searches, similar to those that would be made by prospective students. Ninety-seven (n = 97) degree programs in the U.S. were evaluated. Overall, results showed that advanced technical courses are missing from curricula. We …

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Hybrid Power Generation System Through Vertical Axis Wind Turbine And Solar Pv, Zeeshan Memon Aug 2021

Hybrid Power Generation System Through Vertical Axis Wind Turbine And Solar Pv, Zeeshan Memon

International Programs

The design of a hybrid electric power generation system utilizing both wind and solar energy for remote area is today’s need. The system has two basic components – one for generation of electricity through Solar Energy and another one for generation from Wind Energy. Even in the case of absence of either of the two sources, the other remaining source could be used to supplement the absence of the former. The power from wind current can be extracted using a vertical axis turbine. Vertical axis turbine is capable of extracting power form wind regardless of the direction of flow. The …

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The “East Side” Of Las Vegas: A Latinx Historical Framework, Nathalie Martinez Aug 2021

The “East Side” Of Las Vegas: A Latinx Historical Framework, Nathalie Martinez

Spectra Undergraduate Research Journal

Spanish heritage speakers in the United States are a reflection of everchanging linguistic and sociolinguistic pressures that result in myriad varieties across generations. This paper provides a preliminary historical framework to fill this gap of linguistic knowledge in the Spanish-speaking community of Las Vegas, Nevada. The goals were two-fold: (1) highlight the largest Spanish-speaking communities in Las Vegas and (2) explore the significance of the East Side in the history of the Latinx population of Las Vegas. Through the analysis of oral histories and historical works, the investigation highlights the Mexican, Salvadoran, and Cuban populations of Las Vegas and their …

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Qualitative Review Of Educational Interventions For Improving Physical Activity Behaviors In Older Asian Americans In The United States, Raisa Kabir, Manoj Sharma, Sayeda Tazim Zaidi, Chia-Liang Dai Aug 2021

Qualitative Review Of Educational Interventions For Improving Physical Activity Behaviors In Older Asian Americans In The United States, Raisa Kabir, Manoj Sharma, Sayeda Tazim Zaidi, Chia-Liang Dai

Spectra Undergraduate Research Journal

Physical activity (PA) provides numerous health benefits and minimizes chronic diseases and mental health issues, especially in older adults. The national survey data indicated that only 27.3% to 44.3% of older adults meet the recommended PA guidelines of 150 to 300 minutes/ week. There is limited data on PA behavior among older Asian American (AA) adults as very few to no local/national surveys have targeted these marginalized subgroups. This comprehensive review aims to identify existing PA intervention strategies and to update current knowledge on the effectiveness of these interventions to improve PA behavior among aging AA in the US. The …

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The Future Of The Live Entertainment Tax In Southern Nevada, Katie M. Gilbertson Aug 2021

The Future Of The Live Entertainment Tax In Southern Nevada, Katie M. Gilbertson

Spectra Undergraduate Research Journal

The Live Entertainment Tax (LET) in Nevada generated nearly one billion dollars during the 2019-2020 fiscal year. LET revenue all goes to the State General Fund, even though 97 percent of LET revenue is generated in Clark County. Nevada is experiencing an economic crisis, particularly in the tourism industry. Solutions from various fields suggest the best way to boost the local economy is to reinvest revenue in its original county. One policy solution Nevada policymakers should consider is to carve out a percentage of revenue generated by the LET to return directly back to Clark County to revitalize tourism.

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Diabetes Mellitus Affects Working Memory, Dylone C. Braganza, Emmanuel Flores, Lauren A. Crew, Ryan A. Wirt, Andrew A. Ortiz, Adam M. Mcneela, Jefferson W. Kinney, James M. Hyman Aug 2021

Diabetes Mellitus Affects Working Memory, Dylone C. Braganza, Emmanuel Flores, Lauren A. Crew, Ryan A. Wirt, Andrew A. Ortiz, Adam M. Mcneela, Jefferson W. Kinney, James M. Hyman

Spectra Undergraduate Research Journal

Alzheimer’s disease (AD) degrades the brain’s ability to remember, think, and carry out tasks. The exact cause is not known, but several risk factors have been identified, including diabetes mellitus (DM). DM causes elevated blood sugar levels due to reduced insulin production in the pancreas. The linkage between elevated glucose levels and the behavioral impairments are not fully understood, which was the focus of this study. Rats were trained to alternate directions in a maze to receive a reward on consecutive trials. After training, five rats were injected with streptozotocin (STZ), which induces hyperglycemia by injuring pancreatic beta cells. Three …

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A Timeline Of Discovery And Current Research On Primary Open-Angle Glaucoma And Emergence Of Potentially Permanent Treatment Solutions, Yonosuke Dejesus, Guadalupe Moreno Ceballos Aug 2021

A Timeline Of Discovery And Current Research On Primary Open-Angle Glaucoma And Emergence Of Potentially Permanent Treatment Solutions, Yonosuke Dejesus, Guadalupe Moreno Ceballos

Spectra Undergraduate Research Journal

This research examines the timeline of the discovery and research of Primary Open-Angle Glaucoma (POAG). By reviewing the literature on genetic and molecular mechanisms, we aim to emphasize a long-term treatment solution (iSTENT) to mitigate intraocular pressure (IOP) related to POAG etiology and disease progression. POAG is a multifactorial, autosomal dominant, adult-onset eye disease wherein the optic nerve cells become damaged due to a buildup of excess aqueous humor, resulting in increased IOP. Consequently, POAG leads to progressive loss of peripheral vision and is the leading cause of blindness in the US. Due to the multifactorial nature of glaucoma’s inheritance …

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Racial Profiling: Understanding The Practice Of Stop-And-Frisk In New York City, Lisa Ly Aug 2021

Racial Profiling: Understanding The Practice Of Stop-And-Frisk In New York City, Lisa Ly

Spectra Undergraduate Research Journal

Racial profiling has become a prominent issue in modern policing today. Instead of being based on individual suspicion, racial profiling embodies a belief that people of color are continuously singled out by the police for scrutiny and harassment. Policies and procedures make the Black community vulnerable to police discrimination and racial profiling. Floyd et al. v. City of New York et al. (2013) declared that the New York Police Department’s (NYPD) practice of stop-and-frisk was racially profiling Black civilians. This study sought (1) to determine if the NYPD post-Floyd is still engaging in racial profiling towards Black civilians; and (2) …

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The Life And Scientific Work Of Hiroshi Kunita, Yasushi Ishikawa Aug 2021

The Life And Scientific Work Of Hiroshi Kunita, Yasushi Ishikawa

Journal of Stochastic Analysis

No abstract provided.

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Grass‐Planting And Sheep‐Raising Skills Development In Rocky Desertification Mountain Area, Jiahai Wu, Qiong Mou, Chengbing Tang, Xiangyong Zhao, Daquan Zhang, Guonian Xie Aug 2021

Grass‐Planting And Sheep‐Raising Skills Development In Rocky Desertification Mountain Area, Jiahai Wu, Qiong Mou, Chengbing Tang, Xiangyong Zhao, Daquan Zhang, Guonian Xie

IGC Proceedings (1993-2023)

No abstract provided.

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Master Grazer: Educating Kentucky Livestock Producers, S. Ray Smith, Garry D. Lacefield Aug 2021

Master Grazer: Educating Kentucky Livestock Producers, S. Ray Smith, Garry D. Lacefield

IGC Proceedings (1993-2023)

No abstract provided.

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Proof And Supporting Sites For Integrating R, D&E In Grazing Systems Research, Ian Simpson, Warren Mason Aug 2021

Proof And Supporting Sites For Integrating R, D&E In Grazing Systems Research, Ian Simpson, Warren Mason

IGC Proceedings (1993-2023)

No abstract provided.

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The Adoption Of Sustainable Grazing Land Management Practices In The Burdekin Rangelands Of Northern Australia, Robert N. Shepherd Aug 2021

The Adoption Of Sustainable Grazing Land Management Practices In The Burdekin Rangelands Of Northern Australia, Robert N. Shepherd

IGC Proceedings (1993-2023)

No abstract provided.

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Smallholder Innovation And Adoption Of Hay And Silage Technologies In Honduras, Christoph Reiber, R. Schultze‐Kraft, M. Peters, H. Cruz Aug 2021

Smallholder Innovation And Adoption Of Hay And Silage Technologies In Honduras, Christoph Reiber, R. Schultze‐Kraft, M. Peters, H. Cruz

IGC Proceedings (1993-2023)

No abstract provided.

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Lag Time Between State-Level Policy Interventions And Change Points In Covid-19 Outcomes In The United States, Jaechoul Lee Aug 2021

Lag Time Between State-Level Policy Interventions And Change Points In Covid-19 Outcomes In The United States, Jaechoul Lee

Mathematics Faculty Publications and Presentations

State-level policy interventions have been critical in managing the spread of the new coronavirus. Here, we study the lag time between policy interventions and change in COVID-19 outcome trajectory in the United States. We develop a stepwise drifts random walk model to account for non-stationarity and strong temporal correlation and subsequently apply a change-point detection algorithm to estimate the number and times of change points in the COVID-19 outcome data. Furthermore, we harmonize data on the estimated change points with non-pharmaceutical interventions adopted by each state of the United States, which provides us insights regarding the lag time between the …

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Geology And Lithogeochemistry Of The Pickett Mountain Volcanogenic Massive Sulfide Deposit, Northern Maine, Michael J. Mccormick Aug 2021

Geology And Lithogeochemistry Of The Pickett Mountain Volcanogenic Massive Sulfide Deposit, Northern Maine, Michael J. Mccormick

Electronic Theses and Dissertations

The Pickett Mountain deposit is a volcanogenic massive sulfide (VMS) base-metal deposit located 15 miles north of Patten, ME. The deposit, discovered in 1979, was abandoned in 1989. The deposit remained abandoned until 2017, when Wolfden Mt. Chase LLC purchased the land for further development after Maine mining regulations changed. This project is a collaboration between the University of Maine, the University of Maine – Presque Isle, Wolfden Resources Corp., and the University of New Brunswick to better understand the regional and deposit-scale geology related to the deposit to fill in gaps of the geologic story of northern Maine as …

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Urinary Bile Acid Indices As Prognostic Biomarkers For The Complications Of Liver Diseases, Wenkuan Li Aug 2021

Urinary Bile Acid Indices As Prognostic Biomarkers For The Complications Of Liver Diseases, Wenkuan Li

Theses & Dissertations

Hepatobilary diseases cause the accumulation of toxic bile acids (BA) in the liver, blood, and other tissues, which may lead to an unfavorable prognosis. In this study, we compared the urinary BA profile in 257 patients with hepatobilary diseases during a 7-year follow-up period. We investigated the use of the urinary BA profile to develop logistic regression models to predict the prognosis of hepatobiliary diseases in terms of developing disease-related complications, especially for ascites. The urinary BA profile was characterized by calculating BA indices, which quantify the composition, metabolism, hydrophilicity, and toxicity of the BA profile. All patients had high …

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Further Astrochemical Insights From Bond Strengths Of Small Molecules Containing Atoms From The First Three Rows Of The Periodic Table, Edmund S. Doerksen, Ryan C. Fortenberry Aug 2021

Further Astrochemical Insights From Bond Strengths Of Small Molecules Containing Atoms From The First Three Rows Of The Periodic Table, Edmund S. Doerksen, Ryan C. Fortenberry

Faculty and Student Publications

The atoms contributing to the strongest “single bonds” on the periodic table do not continue to produce the strongest “double bonds” or “triple bonds.” In fact, the opposite appears to be the case. This quantum chemical examination of nominal X = Y and X ≡ Y bonds in model molecules of atoms from the first three rows of the periodic table shows that the strongest “double bond” is in formaldehyde once the astrophysically-depleted Be and B atoms are removed from consideration. The strongest “triple bond” is a close match between acetylene and N2. However, these results indicate that astrophysical regions …

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The Impacts Of Tropical Cyclones In Zimbabwe, Emmerson Chivhenge Aug 2021

The Impacts Of Tropical Cyclones In Zimbabwe, Emmerson Chivhenge

International Programs

No abstract provided.

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Paleomagnetism Of The Karoo Large Igneous Province In The Sani Pass Area, South Africa-Lesotho Border, Batobeleng Monareng Aug 2021

Paleomagnetism Of The Karoo Large Igneous Province In The Sani Pass Area, South Africa-Lesotho Border, Batobeleng Monareng

International Programs

Large Igneous Province have been linked to rapid climate change and mass extinction. In this study we report paleomagnetic results from 52 sites of the Karoo Large Igneous Province in the Sani Pass area. 29 sites shows reverse polarity, 12 sites with normal polarity and 11 sites with excursional polarity. A polarity sequence of R-N-R-N is observed from the bottom to the top of the Sani Pass section.

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Conceptual Model For Spillover Rain Formation In Lima, Peru, Piero Rivas Aug 2021

Conceptual Model For Spillover Rain Formation In Lima, Peru, Piero Rivas

International Programs

A composite analysis determined that spillover rain formation in Lima is driven mainly by systems in high levels which in turn fortify easterly winds that also bring moisture from the Amazon basin.

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Who Creates Strong Passwords When Nudging Fails, Shelia M. Kennison, Ian T. Jones, Victoria H. Spooner, D. Eric Chan-Tin Aug 2021

Who Creates Strong Passwords When Nudging Fails, Shelia M. Kennison, Ian T. Jones, Victoria H. Spooner, D. Eric Chan-Tin

Computer Science: Faculty Publications and Other Works

The use of strong passwords is viewed as a recommended cybersecurity practice, as the hacking of weak passwords led to major cybersecurity breaches. The present research investigated whether nudging with messages based on participants’ self-schemas could lead them to create stronger passwords. We modeled our study on prior health-related research demonstrating positive results using messages based on self-schema categories (i.e., True Colors categories -compassionate, loyal, intellectual, and adventurous). We carried out an online study, one with 256 (185 women, 66 men, 5 other) undergraduates and one with 424 (240 men, 179 women, 5 other) Amazon Mechanical Turk (MTurk) workers, in …

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Centralizers Of Abelian Hamiltonian Actions On Rational Ruled Surfaces, Pranav Vijay Chakravarthy Aug 2021

Centralizers Of Abelian Hamiltonian Actions On Rational Ruled Surfaces, Pranav Vijay Chakravarthy

Electronic Thesis and Dissertation Repository

In this thesis, we compute the homotopy type of the group of equivariant symplectomorphisms of $S^2 \times S^2$ and $CP^2$ blown up once under the presence of Hamiltonian group actions of either $S^1$ or finite cyclic groups. For Hamiltonian circle actions, we prove that the centralizers are homotopy equivalent to either a torus, or to the homotopy pushout of two tori depending on whether the circle action extends to a single toric action or to exactly two non-equivalent toric actions. We can show that the same holds for the centralizers of most finite cyclic groups in the Hamiltonian group $\Ham(M)$. …

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The Design And Characterization Of Advanced Li Metal Anodes For Next-Generation Batteries, Keegan R. Adair Aug 2021

The Design And Characterization Of Advanced Li Metal Anodes For Next-Generation Batteries, Keegan R. Adair

Electronic Thesis and Dissertation Repository

Li metal batteries have been widely regarded as the next stage of energy storage technology, which is enabled by the low electrochemical potential (-3.04 V vs. the standard hydrogen electrode) and high specific capacity (3860 mAh g-1) of the Li metal anode. However, the implementation of Li metal anodes has been hindered by several issues including parasitic side reactions with electrolyte, large volume fluctuations, and dendrite formation which can cause short-circuits and safety issues. This thesis will cover some novel Li anode stabilization strategies while using advanced characterization techniques to provide critical information on the working mechanisms of …

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