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2021

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A Nonlinear Autoregressive Distributed Lag (Nardl) Analysis Of The Ftse And S&P500 Indexes, David E. Allen, Michael Mcaleer Jan 2021

A Nonlinear Autoregressive Distributed Lag (Nardl) Analysis Of The Ftse And S&P500 Indexes, David E. Allen, Michael Mcaleer

Research outputs 2014 to 2021

The paper features an examination of the link between the behaviour of the FTSE 100 and S&P500 Indexes in both an autoregressive distributed lag ARDL, plus a nonlinear autoregressive distributed lag NARDL framework. The attraction of NARDL is that it represents the simplest method available of modelling combined short-and long-run asymmetries. The bounds testing framework adopted means that it can be applied to stationary and non-stationary time series vectors, or combinations of both. The data comprise a daily FTSE adjusted price series, commencing in April 2009 and terminating in March 2021, and a corresponding daily S&P500 Index adjusted-price series obtained …

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The Effect Of The Covid-19 Vaccine On Daily Cases And Deaths Based On Global Vaccine Data, Zhiwei Li, Xiangtong Liu, Mengyang Liu, Zhiyuan Wu, Yue Liu, Weiming Li, Mengmeng Liu, Xiaonan Wang, Bo Gao, Yanxia Luo, Xia Li, Lixin Tao, Wei Wang, Xiuhua Guo Jan 2021

The Effect Of The Covid-19 Vaccine On Daily Cases And Deaths Based On Global Vaccine Data, Zhiwei Li, Xiangtong Liu, Mengyang Liu, Zhiyuan Wu, Yue Liu, Weiming Li, Mengmeng Liu, Xiaonan Wang, Bo Gao, Yanxia Luo, Xia Li, Lixin Tao, Wei Wang, Xiuhua Guo

Research outputs 2014 to 2021

Background: Coronavirus disease 2019 (COVID-19), a global pandemic, has caused over 216 million cases and 4.50 million deaths as of 30 August 2021. Vaccines can be regarded as one of the most powerful weapons to eliminate the pandemic, but the impact of vaccines on daily COVID-19 cases and deaths by country is unclear. This study aimed to investigate the correlation between vaccines and daily newly confirmed cases and deaths of COVID-19 in each country worldwide. Methods: Daily data on firstly vaccinated people, fully vaccinated people, new cases and new deaths of COVID-19 were collected from 187 countries. First, we used …

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The Open Maritime Traffic Analysis Dataset, Martin Masek, Chiou Peng Lam, Travis Rybicki, Jacob Snell, Daniel Wheat, Luke Kelly, Damion Glassborow, Cheryl Smith-Gander Jan 2021

The Open Maritime Traffic Analysis Dataset, Martin Masek, Chiou Peng Lam, Travis Rybicki, Jacob Snell, Daniel Wheat, Luke Kelly, Damion Glassborow, Cheryl Smith-Gander

Research outputs 2014 to 2021

Ships traverse the world’s oceans for a diverse range of reasons, including the bulk transportation of goods and resources, carriage of people, exploration and fishing. The size of the oceans and the fact that they connect a multitude of different countries provide challenges in ensuring the safety of vessels at sea and the prevention of illegal activities. To assist with the tracking of ships at sea, the International Maritime Organisation stipulates the use of the Automatic Identification System (AIS) on board ships. The AIS system periodically broadcasts details of a ship’s position, speed and heading, along with other parameters corresponding …

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The Potential Of Involving Communities To Enhance Stem Education, Paula Mildenhall, Bronwen Cowie Jan 2021

The Potential Of Involving Communities To Enhance Stem Education, Paula Mildenhall, Bronwen Cowie

Research outputs 2014 to 2021

By engaging students in everyday issues and events, STEM education can contribute to the development of citizens who are equipped to make the world a better place. However, students’ STEM learning with this focus requires teachers to identify age and context appropriate issues. Student investigation of local issues and events can be motivating for students. Their learning can benefit from involvement with community members who input their knowledge and ideas. Students can contribute ideas and actions to the community, especially when there is a two-way exchange of information from the community to students and students to the community. In this …

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Voltage Stability Of Power Systems With Renewable-Energy Inverter-Based Generators: A Review, Nasser Hosseinzadeh, Asma Aziz, Apel Mahmud, Ameen Gargoom, Mahbub Rabbani Jan 2021

Voltage Stability Of Power Systems With Renewable-Energy Inverter-Based Generators: A Review, Nasser Hosseinzadeh, Asma Aziz, Apel Mahmud, Ameen Gargoom, Mahbub Rabbani

Research outputs 2014 to 2021

© 2021 by the authors. The main purpose of developing microgrids (MGs) is to facilitate the integration of renewable energy sources (RESs) into the power grid. RESs are normally connected to the grid via power electronic inverters. As various types of RESs are increasingly being connected to the electrical power grid, power systems of the near future will have more inverter-based generators (IBGs) instead of synchronous machines. Since IBGs have significant differences in their characteristics compared to synchronous generators (SGs), particularly concerning their inertia and capability to provide reactive power, their impacts on the system dynamics are different compared to …

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Sustainability In Construction Projects: A Systematic Literature Review, Reza Kiani Mavi, Denise Gengatharen, Neda Kiani Mavi, Richard Hughes, Alistair J. Campbell, Ross Yates Jan 2021

Sustainability In Construction Projects: A Systematic Literature Review, Reza Kiani Mavi, Denise Gengatharen, Neda Kiani Mavi, Richard Hughes, Alistair J. Campbell, Ross Yates

Research outputs 2014 to 2021

This paper aims to identify the major research concepts studied in the literature of sustainability in construction projects. Two bibliometric analysis tools—(a) BibExcel and (b) Gephi, were used to analyze the bibliometrics indices of papers and visualize their interrelations as a network, respectively. Therefore, a research focus parallelship network (RFPN) analysis and keyword co-occurrence network (KCON) analysis were performed to uncover the primary research themes. The RFPN analysis clustered the studies into three major categories of evaluating sustainability, project management for sustainability, and drivers of sustainable construction. The KCON analysis revealed that while each paper had a different focus, the …

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A Blockchain-Based Authentication Protocol For Cooperative Vehicular Ad Hoc Network, A. F. M. S. Akhter, Mohiuddin Ahmed, A. F. M. S. Shah, Adnan Anwar, A. S. M. Kayes, Ahmet Zengin Jan 2021

A Blockchain-Based Authentication Protocol For Cooperative Vehicular Ad Hoc Network, A. F. M. S. Akhter, Mohiuddin Ahmed, A. F. M. S. Shah, Adnan Anwar, A. S. M. Kayes, Ahmet Zengin

Research outputs 2014 to 2021

The efficiency of cooperative communication protocols to increase the reliability and range of transmission for Vehicular Ad hoc Network (VANET) is proven, but identity verification and communication security are required to be ensured. Though it is difficult to maintain strong network connections between vehicles because of there high mobility, with the help of cooperative communication, it is possible to increase the communication efficiency, minimise delay, packet loss, and Packet Dropping Rate (PDR). However, cooperating with unknown or unauthorized vehicles could result in information theft, privacy leakage, vulnerable to different security attacks, etc. In this paper, a blockchain based secure and …

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Graphene Nanoplatelets Suspended In Different Basefluids Based Solar Collector: An Experimental And Analytical Study, Omer A. Alawi, Haslinda Mohamed Kamar, Abdul Rahman Mallah, Hussein A. Mohammed, Mohd Aizad Sazrul Sabrudin, Omar A. Hussein, Salim Newaz Kazi, Gholamhassan Najafi Jan 2021

Graphene Nanoplatelets Suspended In Different Basefluids Based Solar Collector: An Experimental And Analytical Study, Omer A. Alawi, Haslinda Mohamed Kamar, Abdul Rahman Mallah, Hussein A. Mohammed, Mohd Aizad Sazrul Sabrudin, Omar A. Hussein, Salim Newaz Kazi, Gholamhassan Najafi

Research outputs 2014 to 2021

© 2021 by the authors. Licensee MDPI, Basel, Switzerland. A flat plate solar collector (FPSC) was analytically studied, with functionalized graphene nanoplatelets (f-GNPs) as its working fluid. Four samples (wt % nanofluids) were prepared in different base fluids such as ethylene glycol (EG), distilled water (DW):EG (70:30), and DW:EG (50:50). Experimental results (via DW) were used to verify the effectiveness of the analytical model. Some of the operating conditions were taken into account in this research, including temperatures, power, and mass flow rates. Experimental techniques were used to elucidate the modified nanofluids’ physicochemical properties, such as its particle sizes, stability, …

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Detection And Recognition Of Moving Video Objects: Kalman Filtering With Deep Learning, Hind Rustum Mohammed, Zahir M. Hussain Jan 2021

Detection And Recognition Of Moving Video Objects: Kalman Filtering With Deep Learning, Hind Rustum Mohammed, Zahir M. Hussain

Research outputs 2014 to 2021

© 2021. All rights reserved. Research in object recognition has lately found that Deep Convolutional Neuronal Networks (CNN) provide a breakthrough in detection scores, especially in video applications. This paper presents an approach for object recognition in videos by combining Kalman filter with CNN. Kalman filter is first applied for detection, removing the background and then cropping object. Kalman filtering achieves three important functions: predicting the future location of the object, reducing noise and interference from incorrect detections, and associating multi-objects to tracks. After detection and cropping the moving object, a CNN model will predict the category of object. The …

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Performance Of Fft-Ofdm Versus Dwt-Ofdm Under Compressive Sensing, Zainab Hdeib Al-Shably, Zahir M. Hussain Jan 2021

Performance Of Fft-Ofdm Versus Dwt-Ofdm Under Compressive Sensing, Zainab Hdeib Al-Shably, Zahir M. Hussain

Research outputs 2014 to 2021

In this work, we present a comparative study on the performance of Fourier-based OFDM (FFT-OFDM) and wavelet-based OFDM (DWT-OFDM) under compressive sensing (CS). Transmission over FFT-OFDM and DWT-OFDM, which has been made under different baseband modulation schemes such as Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Key (QPSK), Quadrature amplitude modulation (16QAM) and (64QAM) has been considered. From numerical simulation results, it is observed that the Wavelet-based OFDM system outperforms Fourier based OFDM when the Quadrature Amplitude Modulation is 16QAM and 64QAM within the signal to noise ratios range 30 to 40 dB. Although CS is more efficient in …

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Dynamics And Fate Of Blue Carbon In A Mangrove–Seagrass Seascape: Influence Of Landscape Configuration And Land-Use Change, Maria E. Asplund, Martin Dahl, Rashid O. Ismail, Ariane Arias-Ortiz, Diana Deyanova, João N. Franco, Linus Hammar, Arielle I. Hoamby, Hans W. Linderholm, Liberatus D. Lyimo, Diana Perry, Lina M. Rasmusson, Samantha N. Ridgway, Gloria Salgado Gispert, Stéphanie D’Agata, Leah Glass, Jamal Angelot Mahafina, Volanirina Ramahery, Pere Masque, Mats Björk, Martin Gullström Jan 2021

Dynamics And Fate Of Blue Carbon In A Mangrove–Seagrass Seascape: Influence Of Landscape Configuration And Land-Use Change, Maria E. Asplund, Martin Dahl, Rashid O. Ismail, Ariane Arias-Ortiz, Diana Deyanova, João N. Franco, Linus Hammar, Arielle I. Hoamby, Hans W. Linderholm, Liberatus D. Lyimo, Diana Perry, Lina M. Rasmusson, Samantha N. Ridgway, Gloria Salgado Gispert, Stéphanie D’Agata, Leah Glass, Jamal Angelot Mahafina, Volanirina Ramahery, Pere Masque, Mats Björk, Martin Gullström

Research outputs 2014 to 2021

Context: Seagrass meadows act as efficient natural carbon sinks by sequestering atmospheric CO and through trapping of allochthonous organic material, thereby preserving organic carbon (C ) in their sediments. Less understood is the influence of landscape configuration and transformation (land-use change) on carbon sequestration dynamics in coastal seascapes across the land–sea interface. Objectives: We explored the influence of landscape configuration and degradation of adjacent mangroves on the dynamics and fate of C in seagrass habitats. Methods: Through predictive modelling, we assessed sedimentary C content, stocks and source composition in multiple seascapes (km-wide buffer zones) dominated by different seagrass communities in …

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Sensing Of Surface And Bulk Refractive Index Using Magnetophotonic Crystal With Hybrid Magneto-Optical Response, Daria Ignatyeva, Pavel Kapralov, Polina Golovko, Polina Shilina, Anastasiya Khramova, Sergey Sekatskii, Mohammad Nur-E-Alam, Kamal Alameh, Mikhail Vasiliev, Andrey Kalish, Vladimir Belotelov Jan 2021

Sensing Of Surface And Bulk Refractive Index Using Magnetophotonic Crystal With Hybrid Magneto-Optical Response, Daria Ignatyeva, Pavel Kapralov, Polina Golovko, Polina Shilina, Anastasiya Khramova, Sergey Sekatskii, Mohammad Nur-E-Alam, Kamal Alameh, Mikhail Vasiliev, Andrey Kalish, Vladimir Belotelov

Research outputs 2014 to 2021

We propose an all-dielectric magneto-photonic crystal with a hybrid magneto-optical response that allows for the simultaneous measurements of the surface and bulk refractive index of the analyzed substance. The approach is based on two different spectral features of the magneto-optical response corresponding to the resonances in p-and s-polarizations of the incident light. Angular spectra of p-polarized light have a step-like behavior near the total internal reflection angle which position is sensitive to the bulk refractive index. S-polarized light excites the TE-polarized optical Tamm surface mode localized in a submicron region near the photonic crystal surface and is sensitive to the …

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Recovery Agenda For Sustainable Development Post Covid-19 At The Country Level: Developing A Fuzzy Action Priority Surface, Meisam Ranjbari, Zahra S. Esfandabadi, Simone D. Scagnelli, Peer O. Siebers, Francesco Quatraro Jan 2021

Recovery Agenda For Sustainable Development Post Covid-19 At The Country Level: Developing A Fuzzy Action Priority Surface, Meisam Ranjbari, Zahra S. Esfandabadi, Simone D. Scagnelli, Peer O. Siebers, Francesco Quatraro

Research outputs 2014 to 2021

As a response to the urgent call for recovery actions against the COVID-19 crisis, this research aims to identify action priority areas post COVID-19 toward achieving the targets of the sustainable development goals (SDGs) within the 2030 Agenda for Sustainable Development launched by the United Nations (UN). This paper applies a mixed-method approach to map the post-COVID-19 SDGs targets on a fuzzy action priority surface at the country level in Iran, as a developing country, by taking the following four main steps: (1) using a modified Delphi method to make a list of the SDGs targets influenced by COVID-19; (2) …

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The Renaissance Of Odum's Outwelling Hypothesis In 'Blue Carbon' Science, Isaac R. Santos, David J. Burdige, Tim C. Jennerjahn, Steven Bouillon, Alex Cabral, Oscar Serrano, Thomas Wernberg, Karen Filbee-Dexter, Julia A. Guimond, Joseph J. Tamborski Jan 2021

The Renaissance Of Odum's Outwelling Hypothesis In 'Blue Carbon' Science, Isaac R. Santos, David J. Burdige, Tim C. Jennerjahn, Steven Bouillon, Alex Cabral, Oscar Serrano, Thomas Wernberg, Karen Filbee-Dexter, Julia A. Guimond, Joseph J. Tamborski

Research outputs 2014 to 2021

The term ‘Blue Carbon’ was coined about a decade ago to highlight the important carbon sequestration capacity of coastal vegetated ecosystems. The term has paved the way for the development of programs and policies that preserve and restore these threatened coastal ecosystems for climate change mitigation. Blue carbon research has focused on quantifying carbon stocks and burial rates in sediments or accumulating as biomass. This focus on habitat-bound carbon led us to losing sight of the mobile blue carbon fraction. Oceans, the largest active reservoir of carbon, have become somewhat of a blind spot. Multiple recent investigations have revealed high …

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Towards An Evidence-Informed Differentiated Learning Consolidation Process To Support Classroom Instruction, Nicola Carr-White Jan 2021

Towards An Evidence-Informed Differentiated Learning Consolidation Process To Support Classroom Instruction, Nicola Carr-White

Theses: Doctorates and Masters

Despite many years of teaching experience, the differentiation and consolidation of classroom learning presented challenges for the researcher. In response, a Differentiated Learning Consolidation Process (DLCP) was developed through informal classroom-based action research over several years. Using low cost and accessible resources, it developed into a manageable supplementary intervention to support individual student needs and the retention of classroom instruction. Increasing interest from colleagues led the researcher to provide professional development on the instructional design and implementation of the DLCP. Through this experience, it became apparent that the DLCP theoretical assumptions were largely unknown. The current study was pursued to …

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Exploring The Impact Of Field-Based Supervision Practices In Teaching For Social Justice, Detra Price-Dennis, Erica Colmenares Jan 2021

Exploring The Impact Of Field-Based Supervision Practices In Teaching For Social Justice, Detra Price-Dennis, Erica Colmenares

Faculty Research, Scholarly, and Creative Activity

The purpose of this study is to understand how field-based supervisory practices support preservice teachers’ conceptualizations of reflective practice, curriculum inquiry, and social justice-oriented pedagogies. Moving away from the more traditional supervisory triad model (e.g., preservice student--cooperating teacher--university supervisor), our qualitative investigation examined five supervisory practices: formal observation, Lesson Study, video debriefs/observations, guided observations, and participation in Intellectual Learning Communities (ILCs). Through a case study of two preservice teachers, this study highlights how these supervisory practices helped support preservice teachers’ notions of reflective practice and curriculum inquiry but did not deepen their notions of social justice and inclusivity.

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Peer Motivation: Getting Through Math Together, Jessica Mean, Wes Maciejewski Jan 2021

Peer Motivation: Getting Through Math Together, Jessica Mean, Wes Maciejewski

Faculty Research, Scholarly, and Creative Activity

Students have a complex relationship with mathematics. Some love it, but more often than not, the feelings are less favorable. These feelings can lead to decreased motivation which makes it difficult for students to engage with the subject as the semester progresses. Instructors also have difficulty addressing this waning motivation. In this paper, we claim peers are better able to connect with the students and this can be leveraged to better motivate students. We present an approach to having peers motivate their students. These peer interactions integrated with a mandatory mathematics course might improve students’ motivation.

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A Culturally And Structurally Sensitive Approach To Working With Suicidal Latinx Individuals: Recommendations For Clinicians, Jessa Navidé Jan 2021

A Culturally And Structurally Sensitive Approach To Working With Suicidal Latinx Individuals: Recommendations For Clinicians, Jessa Navidé

Graduate School of Professional Psychology: Doctoral Papers and Masters Projects

Latinx individuals are the fastest growing racial/ethnic group in the U.S. and confront numerous challenges living in the U.S. that can impact their mental health. While their overall suicide rates are relatively low compared to non-Hispanic Whites, it is concerning to note suicide rates of Latinx individuals living in the U.S. are significantly higher compared to most countries in Latin America. The predominant approaches to treating suicidal individuals often fail to consider the sociopolitical climate and systemic challenges that exacerbate mental health concerns for Latinx individuals. This paper examines cultural considerations, racial and ethnic identity models, and unique protective and …

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Typology Emerges From Simplicity In Representations And Learning, Dakotah Lambert, Jonathan Rawski, Jeffrey Heinz Jan 2021

Typology Emerges From Simplicity In Representations And Learning, Dakotah Lambert, Jonathan Rawski, Jeffrey Heinz

Faculty Research, Scholarly, and Creative Activity

We derive well-understood and well-studied subregular classes of formal languages purely from the computational perspective of algorithmic learning problems. We parameterise the learning problem along dimensions of representation and inference strategy. Of special interest are those classes of languages whose learning algorithms are necessarily not prohibitively expensive in space and time, since learners are often exposed to adverse conditions and sparse data. Learned natural language patterns are expected to be most like the patterns in these classes, an expectation supported by previous typological and linguistic research in phonology. A second result is that the learning algorithms presented here are completely …

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The Damage Throttling Number Of A Graph, Joshua Carlson, Robin Eagleton, Jesse Geneson, John Petrucci, Carolyn Reinhart, Preetul Sen Jan 2021

The Damage Throttling Number Of A Graph, Joshua Carlson, Robin Eagleton, Jesse Geneson, John Petrucci, Carolyn Reinhart, Preetul Sen

Faculty Research, Scholarly, and Creative Activity

The cop throttling number of a graph, introduced in 2018 by Breen et al., optimizes the balance between the number of cops used and the number of rounds required to catch the robber in a game of Cops and Robbers. In 2019, Cox and Sanaei studied a variant of Cops and Robbers in which the robber tries to occupy (or damage) as many vertices as possible and the cop tries to minimize this damage. They investigated the minimum number of vertices damaged by the robber over all games played on a given graph G, called the damage number of G. …

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A Codex Of N-And P-Positions In Harary’S ‘Caterpillar Game’, Richard M. Low, Ardak Kapbasov, Arman Kapbasov, Stephen C. Locke, W. H. Chan Jan 2021

A Codex Of N-And P-Positions In Harary’S ‘Caterpillar Game’, Richard M. Low, Ardak Kapbasov, Arman Kapbasov, Stephen C. Locke, W. H. Chan

Faculty Research, Scholarly, and Creative Activity

Frank Harary proposed the following game: Given a caterpillar C, two players take turns removing edges of a path. The player who takes the last edge wins the game. In this paper, we completely characterize the N-and P-positions for all caterpillars with spine length zero, one, two and three. Furthermore, we analyze approximately 94% of the caterpillars with spine length greater than or equal to four. In those cases, they all turn out to be N-positions.

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On The Edge Irregular Reflexive Labeling Of Corona Product Of Graphs With Path, Kooi Kuan Yoong, Roslan Hasni, Muhammad Irfan, Ibrahim Taraweh, Ali Ahmad, Sin Min Lee Jan 2021

On The Edge Irregular Reflexive Labeling Of Corona Product Of Graphs With Path, Kooi Kuan Yoong, Roslan Hasni, Muhammad Irfan, Ibrahim Taraweh, Ali Ahmad, Sin Min Lee

Faculty Research, Scholarly, and Creative Activity

We define a total k-labeling (Formula presented.) of a graph G as a combination of an edge labeling (Formula presented.) and a vertex labeling (Formula presented.) such that (Formula presented.) if (Formula presented.) and (Formula presented.) if (Formula presented.) where (Formula presented.) The total k-labeling (Formula presented.) is called an edge irregular reflexive k-labeling of G if every two different edges has distinct edge weights, where the edge weight is defined as the summation of the edge label itself and its two vertex labels. Thus, the smallest value of k for which the graph G has the edge irregular reflexive …

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Almost All Permutation Matrices Have Bounded Saturation Functions, Jesse Geneson Jan 2021

Almost All Permutation Matrices Have Bounded Saturation Functions, Jesse Geneson

Faculty Research, Scholarly, and Creative Activity

Saturation problems for forbidden graphs have been a popular area of research for many decades, and recently Brualdi and Cao initiated the study of a saturation problem for 0-1 matrices. We say that a 0-1 matrix A is saturating for the forbidden 0-1 matrix P if A avoids P but changing any zero to a one in A creates a copy of P . Define sat(n, P ) to be the minimum possible number of ones in an n × n 0-1 matrix that is saturating for P . Fulek and Keszegh proved that for every 0-1 matrix P, either …

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Extensible Embedded Processor For Convolutional Neural Networks, Joshua Misko, Shrikant S. Jadhav, Youngsoo Kim Jan 2021

Extensible Embedded Processor For Convolutional Neural Networks, Joshua Misko, Shrikant S. Jadhav, Youngsoo Kim

Faculty Research, Scholarly, and Creative Activity

Convolutional neural networks (CNNs) require significant computing power during inference. Smart phones, for example, may not run a facial recognition system or search algorithm smoothly due to the lack of resources and supporting hardware. Methods for reducing memory size and increasing execution speed have been explored, but choosing effective techniques for an application requires extensive knowledge of the network architecture. This paper proposes a general approach to preparing a compressed deep neural network processor for inference with minimal additions to existing microprocessor hardware. To show the benefits to the proposed approach, an example CNN for synthetic aperture radar target classification …

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The Integer-Antimagic Spectra Of Graphs With A Chord, Richard M. Low, Dan Roberts, Jinze Zheng Jan 2021

The Integer-Antimagic Spectra Of Graphs With A Chord, Richard M. Low, Dan Roberts, Jinze Zheng

Faculty Research, Scholarly, and Creative Activity

Let A be a nontrival abelian group. A connected simple graph G = (V, E) is Aantimagic if there exists an edge labeling f : E(G) → A \ {0} such that the induced vertex labeling f+ : V (G) → A, defined by f+(v) = Puv∈E(G) f(uv), is injective. The integer-antimagic spectrum of a graph G is the set IAM(G) = {k | G is Zk-antimagic and k ≥ 2}. In this paper, we determine the integer-antimagic spectra for cycles with a chord, paths with a chord, and wheels with a chord.

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Differences In Ride-Hailing Adoption By Older Californians Among Types Of Locations, Manish Shirgaokar, Asha Weinstein Agrawal, Bonnie Dobbs, Aditi Misra, Martin Wachs Jan 2021

Differences In Ride-Hailing Adoption By Older Californians Among Types Of Locations, Manish Shirgaokar, Asha Weinstein Agrawal, Bonnie Dobbs, Aditi Misra, Martin Wachs

Faculty Research, Scholarly, and Creative Activity

Ride-hailing services such as Lyft and Uber can complement rides offered by family, friends, paid providers, and public transit. To learn why older adults might wish to use ride-hail, we conducted an online survey of 2,917 California respondents age 55 and older. Participants were asked whether they would value four features hypothesized to be benefits of ride-hailing. We specified binary logit models and used market segmentation to investigate whether there were location-based differences in the use of ride-hailing. Our analysis showed that women, city dwellers, persons with disabilities, and those who rely on others for rides were more open to …

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Multifidelity Approaches For Uncertainty Estimation In Wildfire Spread Simulators, Mario Miguel Valero, Lluís Jofre, Ricardo Torres Jan 2021

Multifidelity Approaches For Uncertainty Estimation In Wildfire Spread Simulators, Mario Miguel Valero, Lluís Jofre, Ricardo Torres

Faculty Research, Scholarly, and Creative Activity

A variety of wildfire models are currently used for prescribed fire management, fire behaviour studies and decision support during wildfire emergencies, among other applications. All these applications are based on predictive analysis, and therefore require careful estimation of aleatoric and epistemic uncertainties such as weather conditions, vegetation properties and model parameters. However, the large computational cost of high-fidelity computaional fluid dynamics models prohibits the straightforward utilization of traditional Monte Carlo methods. Conversely, low-fidelity fire models are several orders of magnitude faster but they typically do not provide enough accuracy and they do not resolve all relevant phenomena. Multifidelity frameworks offer …

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Unpacking Challenges In Student-Faculty Partnerships On Departmental Action Teams, Gina M. Quan, Joel C. Corbo, Sarah Wise, Courtney Ngai Jan 2021

Unpacking Challenges In Student-Faculty Partnerships On Departmental Action Teams, Gina M. Quan, Joel C. Corbo, Sarah Wise, Courtney Ngai

Faculty Research, Scholarly, and Creative Activity

This paper is a case study analysis of one student-faculty partnership working to enact departmental change. Students as Partners (SaP) is an approach in which students and faculty work in partnership on the co-design of a curricular or institutional change effort. Our team implements SaP through Departmental Action Teams (DATs), which are facilitated teams of faculty, students, and staff within a single STEM department working on an issue related to undergraduate education. In our research, we aim to understand the ways in which SaP becomes enacted in DATs. Through analyzing interviews with student and faculty members of a single DAT, …

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C4-Face-Magic Toroidal Labelings On CM × CN, Stephen J. Curran, Richard M. Low, Stephen C. Locke Jan 2021

C4-Face-Magic Toroidal Labelings On CM × CN, Stephen J. Curran, Richard M. Low, Stephen C. Locke

Faculty Research, Scholarly, and Creative Activity

For a graph G = (V, E) naturally embedded in the torus, let F(G) denote the set of faces of G. Then, G is called a Cn-face-magic toroidal graph if there exists a bijection f : V (G) → {1, 2, . . ., |V (G)|} such that for every F ∈ F(G) with F ∼= Cn, the sum of all the vertex labels along Cn is a constant S. Let xv = f(v) for all v ∈ V (G). We call {xv : v ∈ V (G)} a Cn-face-magic toroidal labeling on G. We show that, for all m, …

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List-Antimagic Labeling Of Vertex-Weighted Graphs, Zhanar Berikkyzy, Axel Brandt, Sogol Jahanbekam, Victor Larsen, Danny Rorabaugh Jan 2021

List-Antimagic Labeling Of Vertex-Weighted Graphs, Zhanar Berikkyzy, Axel Brandt, Sogol Jahanbekam, Victor Larsen, Danny Rorabaugh

Faculty Research, Scholarly, and Creative Activity

A graph G is weighted-k-list-antimagic if for any vertex weighting →: V (G) → R and any list assignment L: E(G) → 2R with jL(e)j ≤ jE(G)j + k there exists an edge labeling f such that f(e) 2 L(e) for all e 2 E(G), labels of edges are pairwise distinct, and the sum of the labels on edges incident to a vertex plus the weight of that vertex is distinct from the sum at every other vertex. In this paper we prove that every graph on n vertices having no K1 or K2 component is weighted-4n 3 -list-antimagic.

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