Digital Commons Network^™

Positive And Decreasing Solutions For Higher Order Caputo Boundary Valueproblems With Sign-Changing Green’S Function, Rian Yan, Yige Zhao, Xuan Leng, Yabing Li

Turkish Journal of Mathematics

In this paper, Caputo boundary value problems of order 3 < ζ ≤ 4 are investigated on the interval [0, 1] .By Guo-Krasnoselskii fixed point theorem, some criteria of existence and multiplicity of positive and decreasing solutionsare established. The main novelty of the paper lies in its capability to achieve positive solutions while the correspondingGreen’s function changes sign. Finally, two examples are provided to illustrate the application of these results.

Stacks In Einstein Gravity, Kadri̇ İlker Berktav

Turkish Journal of Mathematics

In this paper, we examine stacky structures in certain Einstein gravity theories. In brief, using the classicalformulation of (vacuum) gravity, with vanishing cosmological constant, we first construct the stack of solutions to Einsteinfield equations on any given fixed manifold. Using a similar approach and setup, we also study Einstein’s gravity onfamilies of manifolds and define another stack encoding this situation. Later on, we focus on the gauge theoreticalinterpretation of 3D gravity and provide a natural stack associated with that interpretation. Finally, in a particularsetup, we give a natural morphism between the two stacks arising from different descriptions of 3D gravity.

Curves As Slant Submanifolds Of An Almost Product Riemannian Manifold, Pablo Alegre, Alfonso Carriazo

Turkish Journal of Mathematics

In this paper, we show that in an almost product manifold there exist curves that are slant submanifolds. Wecharacterize these curves and study them in two and three-dimensional locally product manifolds. Finally, we constructcurves in a hypersurface of a Kaehler manifold.

Properties Of Gyrogroups Induced By Groups Whose Central Quotients Being 2-Engel, Jaturon Wattanapan, Teerapong Suksumran

Turkish Journal of Mathematics

A group Γ is said to be CCII if the quotient Γ/Z(Γ) is 2-Engel or, equivalently, commutator-inversion invariant, where Z(Γ) is the center of Γ. In this article, we prove algebraic and topological properties of gyrogroups that are induced by CCII groups. Then, using a classification of non-abelian groups of order n with n < 32, we determine all finite CCII groups of order less than 32.

The Flow-Geodesic Curvature And The Flow-Evolute Of Spherical Curves, Mircea Crasmareanu

Turkish Journal of Mathematics

We introduce and study a deformation of the geodesic curvature for a given spherical curve γ . Also, wedefine a new type of evolute and two Fermi-Walker type derivatives for γ . Some concrete examples are detailed with aspecial attention towards space curves with a constant torsion.

Interior Schauder-Type Estimates For M − Th Order Elliptic Operators Inrearrangement-Invariant Sobolev Spaces, Emi̇nağa M. Mamedov, Şeyma Çeti̇n

Turkish Journal of Mathematics

In this study, we investigate the m-th order elliptic operators on n-dimensional bounded domain Ω ⊂ Rnwith discontinuous coefficients in the rearrangement-invariant Sobolev space WmX (Ω). In general, the consideredrearrangement-invariant spaces are not separable, so the use of classical methods in these spaces requires substantialmodification of classical methods and a lot of preparation, concerning correctness of substitution operator, problemsrelated to the extension operator in such spaces, etc. For this purpose, the corresponding separable subspaces of thesespaces, in which the set of compact supported infinitely differentiable functions is dense, are introduced based on theshift operator. We establish interior Schauder-type estimates in …

On Vietoris’ Hybrid Number Sequence, Nurten Gürses, Gülsüm Yeli̇z Saçli, Sali̇m Yüce

Turkish Journal of Mathematics

This work is intended to establish a relation between Vietoris’ sequence, which is a rational sequence, andhybrid numbers. Then it provides some characteristic properties of the hybrid numbers with Vietoris’ number coefficients.Some relations between this hybrid number and its norm, the recurrence relations, the generating function, Binet-likeformula and Catalan-like identities are also indicated. Furthermore, a determinantal approach is presented to obtainelements of Vietoris’ hybrid number sequence.

Some Qualitative Results For Nonlocal Dynamic Boundary Value Problem Of Thermistor Type, Svetlin G. Georgiev, Mahammad Khuddush, Sanket Tikare

Turkish Journal of Mathematics

This paper is concerned with second-order nonlocal dynamic thermistor problem with two-point boundary conditions on time scales. By utilizing the fixed point theorems due to Schaefer and Rus, we establish some sufficient conditions for the existence and uniqueness of solutions. Further, we discuss the continuous dependence of solutions and four types of Ulam stability. We provide examples to support the applicability of our results.

On A Class Of Permutation Trinomials Over Finite Fields, Burcu Gülmez Temür, Buket Özkaya

Turkish Journal of Mathematics

In this paper, we study the permutation properties of the class of trinomials of the form f(x) = x4q+1 +λ1xq+4 +λ2x2q+3 ∈ Fq2 [x] , where λ1, λ2 ∈ Fq and they are not simultaneously zero. We find all necessary and sufficientconditions on λ1 and λ2 such that f(x) permutes Fq2 , where q is odd and q = 22k+1, k ∈ N.

Generation Of Kochen-Specker Contextual Sets In Higher Dimensions By Dimensional Upscaling Whose Complexity Does Not Scale With Dimension And Their Applications, Mladen Pavičić, Mordecai Waegell

Mathematics, Physics, and Computer Science Faculty Articles and Research

Recently, handling of contextual sets, in particular Kochen-Specker (KS) sets, in higher dimensions has been given an increasing attention, both theoretically and experimentally. However, methods of their generation are diverse, not generally applicable in every dimension, and of exponential complexity. Therefore, we design a dimensional upscaling method, whose complexity does not scale with dimension. As a proof of principle we generate manageable-sized KS master sets in up to 27 dimensional spaces and show that well over 32 dimensions can be reached. From these master sets we obtain an ample number of smaller KS sets. We discuss three kinds of applications …

A Comparative Analysis Of Openet For Evaluating Evapotranspiration In California Almond Orchards, Kyle Knipper, Martha Anderson, Nicholas Bambach, Forrest Melton, Zac Ellis, Yun Yang, John Volk, Andrew J. Mcelrone, William Kustas, Matthew Roby, Will Carrara, Sebastian Castro, Ayse Kilic, Joshua B. Fisher, Anderson Ruhoff, Gabriel B. Senay, Charles Morton, Sebastian Saa, Richard G. Allen

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

The almond industry in California faces water management challenges that are being exacerbated by droughts, climate change, and groundwater sustainability legislation. The Tree-crop Remote sensing of Evapotranspiration eXperiment (T-REX) aims to explore opportunities to improve precision irrigation management for woody perennial cropping systems. Almond orchards in the California Central Valley were equipped with eddy covariance flux measurements to evaluate satellite remote sensing-based evapotranspiration (RSET) models. OpenET provides high-resolution (30-m spatial and daily temporal) RSET data, synthesizing decades of research for practical water management. This study provides an evaluation of OpenET performance at six almond sites covering a large range in …

The Protective Efficacy Of A Sars-Cov-2 Vaccine Candidate B1351v Against Several Variant Challenges In K18-Hace2 Mice, Jie Yang, Huifen Fan, Anna Yang, Wenhui Wang, Xin Wan, Fengjie Lin, Dongsheng Yang, Jie Wu, Kaiwen Wang, Wei Li, Qian Cai, Lei You, Deqin Pang, Jia Lu, Changfu Guo, Jinrong Shi, Yan Sun, Xinguo Li, Kai Duan, Shuo Shen, Shengli Meng, Jing Guo, Zejun Wang

Faculty, Staff and Student Publications

The emergence of SARS-CoV-2 variants of concern (VOCs) with increased transmissibility and partial resistance to neutralization by antibodies has been observed globally. There is an urgent need for an effective vaccine to combat these variants. Our study demonstrated that the B.1.351 variant inactivated vaccine candidate (B.1.351V) generated strong binding and neutralizing antibody responses in BALB/c mice against the B.1.351 virus and other SARS-CoV-2 variants after two doses within 28 days. Immunized K18-hACE2 mice also exhibited elevated levels of live virus-neutralizing antibodies against various SARS-CoV-2 viruses. Following infection with these viruses, K18-hACE2 mice displayed a stable body weight, a high survival …

Pt-Symmetry-Enabled Stable Modes In A Multicore Fiber, Tamara Gratcheva, Yogesh N. Joglekar, Jay Gopalakrishnan

Mathematics and Statistics Faculty Publications and Presentations

Open systems with balanced gain and loss, described by parity-time (PT -symmetric) Hamiltonians have been deeply explored over the past decade. Most explorations are limited to finite discrete models (in real or reciprocal spaces) or continuum problems in one dimension. As a result, these models do not leverage the complexity and variability of two-dimensional continuum problems on a compact support. Here, we investigate eigenvalues of the Schrödinger equation on a disk with zero boundary condition, in the presence of constant, PT -symmetric, gain-loss potential that is confined to two mirror-symmetric disks. We find a rich variety of exceptional points, re-entrant …

Bringing Our Full Selves Into Computing: Designing, Building, And Fostering Equitable Computing Education Communities, Francisco Enrique Vicente Castro, Earl W. Huff, Amber Solomon, Briana Christina Bettin

Michigan Tech Publications

A key problem in achieving access to and sustained presence in computing and computing education (CEd) in the United States is environments that are all too often designed in ways that are harmful and inequitable toward systemically minoritized communities. While various scholars have explored ways to design equitable spaces within differing contexts, often, equity is framed merely as an issue of access. This dismisses the lived experiences of minoritized communities and can lead to shallow perspectives of equity that fail to address community concerns and further push these communities out of sustained participation and presence in computing and CEd. Drawing …

New Oscillation Criteria For First-Order Differential Equations With General Delay Argument, Emad R. Attia, Irena Jadlovska

Turkish Journal of Mathematics

This paper is concerned with the oscillation of solutions to a class of first-order differential equations withvariable coefficients and a general delay argument. New oscillation criteria are established, which improve and extendmany known results reported in the literature. A couple of illustrative examples are given to show the efficiency of thenewly obtained results. In particular, it is shown that our criteria partially fulfill a remaining gap in a recent sharp resultby Pituk et al. [31].

Bernstein-Nikol’Skii-Markov-Type Inequalities For Algebraic Polynomials In Aweighted Lebesgue Space In Regions With Cusps, Uğur Değer, Fahreddi̇n Abdullayev

Turkish Journal of Mathematics

In this paper, we study Bernstein-Nikol’skii-Markov type inequalities for arbitrary algebraic polynomials withrespect to a weighted Lebesgue space, where the weight functions have some singularities on a given contour. We considercurves which can contain a finite number of exterior and interior corners with power law tangency of the boundary arcs atthose points where the weight functions have both zeros and poles of finite order. The estimates are given for the growthof the module of derivatives for algebraic polynomials on the closure of a region bounded by a given curve, dependingon the behavior of weight functions, on the property of curve, …

Successful Strategies Government Executive Stakeholders Use To Mitigate Higher Project Costs And User Adoption Failure Rates, Kimberly Rauscher

Walden Dissertations and Doctoral Studies

U.S. government agency projects are under intense scrutiny due to historical reporting of overspending and significant delays; however, only 13% of U.S. government information technology projects over $6M succeed, costing taxpayers money. Grounded in the theory of constraints, the purpose of this qualitative, pragmatic inquiry was to explore strategies that U.S. government executive stakeholders use to mitigate higher project costs and user adoption failure rates. The participants included three U.S. government agency executive stakeholders in Raleigh, North Carolina, the United States, who successfully implemented strategies to mitigate higher project costs and user adoption failure rates. Data were collected data using …

Butte Priority Soils Operable Unit Grove Gulch Sedimentation Bay 100% Remedial Design/Remedial Action Re-Submittal, Josh Bryson

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Mortality Rate Of Covid-19 With Comorbid Pneumonia In A Rural Area, Anmol Multani, Vineesha Kollipara, Tess Krage, James D. Hearn, Greg Stahl, Kerry Johnson, Scott Goade, Nova Beyersdorfer, Robert Arnce

Faculty and Staff Publications

Background: A myriad of risk factors and comorbidities have been determined to influence COVID-19 mortality rates; among these is pneumonia. This study considers pneumonia as a risk factor for increased mortality in patients admitted with COVID-19 in a rural healthcare system. We predicted that the presence of pneumonia of any kind would increase mortality rates in patients admitted with COVID-19.

Methods: A retrospective observational study was conducted using data collected from hospitals in the Freeman Health System (FHS) located in Joplin and Neosho, Missouri. Data were collected between April 1, 2020, and December 31, 2021. Using International Classification of Diseases, …

Strength Measurement Of The E_Α^Lab = 830 Kev Resonance In The Ne 22 ( Α , N ) Mg 25 Reaction Using A Stilbene Detector, Shahina S., R. J. Deboer, J. Gorres, R. Fang, Michael T. Febbraro, R. Kelmar, M. Matney, K. Manukyan, J. T. Nattress, E. Robles, T. J. Rutland, T. T. King, A. Sanchez, R. S. Sidhu, E. Stech, M. Wiescher

Faculty Publications

The interplay between the ²²Ne (��,��)²⁶Mg reaction and the competing ²²Ne(��,��)²⁵Mg reaction determines the efficiency of the latter as a neutron source at the temperatures of stellar helium burning. In both cases, the rates are dominated by the ��-cluster resonance at 830 keV. This resonance plays a particularly important role in determining the strength of the neutron flux for both the weak and main �� process as well as the �� process. Recent experimental studies based on transfer reactions suggest that the neutron and ��-ray strengths for this resonance are approximately equal. In this …

Human Centered Approaches And Taxonomies For Explainable Artificial Intelligence, Helen Sheridan, Emma Murphy, Dympna O'Sullivan

Conference papers

Recent interest within the research community related to explainable artificial intelligence (XAI) has led to a profuse amount of literature on the subject. Those who wish to tackle the domain from an HCI focus may be presented with overwhelming material, most of which does not pertain to human aspects of XAI. Taxonomies can serve to categorize a subject into topic areas and distill content into an overview of the field. This late breaking work intends to help those within the HCI community with a focus on XAI to understand relevant aspects of human centered XAI. We also present a taxonomy …

Valorization Of Seafood Waste For Food Packaging Development, Zhijing Zhan, Yiming Feng, Jikai Zhao, Mingyu Qiao, Qing Jin

School of Earth, Environmental, & Marine Sciences Faculty Publications

Packaging plays a crucial role in protecting food by providing excellent mechanical properties as well as effectively blocking water vapor, oxygen, oil, and other contaminants. The low degradation of widely used petroleum-based plastics leads to environmental pollution and poses health risks. This has drawn interest in renewable biopolymers as sustainable alternatives. The seafood industry generates significant waste that is rich in bioactive substances like chitin, chitosan, gelatins, and alginate, which can replace synthetic polymers in food packaging. Although biopolymers offer biodegradability, biocompatibility, and non-toxicity, their films often lack mechanical and barrier properties compared with synthetic polymer films. This comprehensive review …

The Effectiveness Of Using The Model Eliciting Activities (Meas) In Improving The Ability To Solve Mathematical Problems And Self-Efficacy Among Female Students In Eighth Grade In The Sultanate Of Oman, Wedad R.R. Al- Mukhini, Mamoon M. Al-Shannaq

Journal of Educational and Psychological Studies

Abstract: The study aims to investigate the effectiveness of using the Model Eliciting Activities (MEAs) on the ability to solve mathematical problems and self-efficacy among female students in eighth grade in the Sultanate of Oman. A quasi-experimental research design was used. The sample of the study consisted of 52 female students. It was divided equally into two groups: an experimental group and a control group. To achieve the objectives of the study, an instrument was developed to measure the students’ ability to solve mathematical problems with test consisting of 6 essay questions. In addition, a questionnaire of self-efficacy in solving …

Concolic Testing For Scripting Languages, Zhe Li

Dissertations and Theses

Scripting languages, such as JavaScript and Lua, are becoming more and more popular. They are typically easy to learn and use, making them accessible to a wide range of developers, even those with limited programming experience. Lua, for instance, is a lightweight, efficient, and versatile scripting language. It is designed to be easy to integrate into other systems and is often used as an embedded scripting language in larger applications such as NMap, which is a network scanning tool.

As another example, web front-end development with JavaScript (JS) is a popular choice for developers due to its ability to add …

Full Issue: Volume 5, Issue 2, Editorial Board

Swarthmore Undergraduate History Journal

The second issue in the fifth volume of the Swarthmore Undergraduate History Journal.

Sea Ice And The Law Of The Sea: The Myth Of Article 234, Amanda H. Lynch, Charles H. Norchi

Ocean and Coastal Law Journal

The sea ice of Article 234 of UNCLOS represents not the physical ice of the Arctic Ocean but a negotiated myth of ice as it affects the Arctic littoral states. The stability of this prescription is threatened by anthropogenic climate change causing a preferential evacuation of ice from the eastern Arctic compared to the western Arctic, as well as expectations for a possible future ice-free Arctic. This is leading to an intensification of claims on marine space. The irreducible uncertainties of the future trajectory of Arctic change demands a dynamic response. The myth of Article 234 will ultimately align with …

Demographic Study Of College Of Sciences At University Of Nevada, Las Vegas, Laura Seo, Nastasija Damjanovic, Angelica Amansec, Aika Dietz, Monika Neda

Spectra Undergraduate Research Journal

In the United States, STEM-related industries are among the fastest-growing. Our study examines the enrollment of students in the College of Sciences (CoS) and the demographics of the student bodies in both undergraduate and graduate programs from 2010 to 2021 at the University of Nevada, Las Vegas (UNLV). Using the method of least squares, a polynomial fit model was used to find trends as well as to calculate enrollment predictions for the years 2025 and 2030. Our results demonstrate that, currently, the UNLV CoS is male dominant in the graduate program and female dominant in the undergraduate program. However, female …

Critical Scoping Review Of Critical Consciousness As A Framework For Precollege Engineering Education, Devon Riter, James Holly Jr.

Journal of Pre-College Engineering Education Research (J-PEER)

Engineering’s promise to build a better world has been realized differently across the United States, often with lines of social identity determining who becomes an engineer, who benefits from engineering innovations, and who suffers devastating consequences. Many educational scholars have argued that engineering inequities are in part due to deep inequities in precollege engineering education, including the failure to enact pedagogies in which engineering educational spaces can help students recognize oppression and act toward liberation. In this critical scoping review we searched five databases to identify 72 relevant peer-reviewed articles for review. Our findings indicate that research on critical consciousness …

No. 23: Enforcement And Exclusion: Covid-19 Policies, Urban Migrants, And Food Insecurity In Pandemic South Africa, Jonathan Crush, Sean Sithole

Migration and Food Security (MiFOOD) Network

On March 5th, 2020, South Africa recorded its first official case of COVID-19 when a South African tourist returning from a holiday in northern Italy tested positive. The number of excess deaths is now over 300,000. The policy response to the pandemic is widely regarded as amongst the most draconian in Africa. In 2020, the government imposed a stay-at-home lockdown for 100 days, which was strictly enforced by armed police and the army. Breach of lockdown was a criminal offence and arrests were widespread. By April 2021, over 400,000 had been apprehended, more than in any other country globally. In …

Changes To Tropical Cyclone Trajectories In Southeast Asia Under A Warming Climate, Andra J. Garner, Dhrubajyoti Samanta, Mackenzie M. Weaver, Benjamin P. Horton

School of Earth & Environment Departmental Research

The impacts of tropical cyclones (TCs) on Southeast Asia’s coastlines are acute due to high population densities in low-lying coastal environments. However, the trajectories of TCs are uncertain in a warming climate. Here, we assess >64,000 simulated TCs from the nineteenth century to the end of the twenty-first century for both moderate- and high-emissions scenarios. Results suggest changes to TC trajectories in Southeast Asia, including: (1) poleward shifts in both genesis and peak intensification rates; (2) TC formation and fastest intensification closer to many coastlines; (3) increased likelihoods of TCs moving most slowly over mainland Southeast Asia; and (4) TC …