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Twenty One Years After The Publication Of The Generalized Faustmann Formula, Sun Joseph Chang Sep 2020

Twenty One Years After The Publication Of The Generalized Faustmann Formula, Sun Joseph Chang

Faculty Publications

In this paper, I discuss developments of the generalized Faustmann formula since its publication in 1998. They included the formula for even-aged plantation management, uneven-aged management and forest valuation. These formula were followed by those for forest property taxation and valuation under taxation, the generalized van Kooten model, and the generalized Reed model as well as the uneven-aged management formula with carbon sequestration. The dynamic, incremental solution for the generalized Faustmann formula was then discussed. Pressler's indicator rate formula turned out to be equally applicable under the generalized Faustmann formula. Further, it enables the incorporation of risk preference to deal …

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Social Inequalities In Flooding Inside And Outside Of Floodplains During Hurricane Harvey, Kevin T. Smiley Sep 2020

Social Inequalities In Flooding Inside And Outside Of Floodplains During Hurricane Harvey, Kevin T. Smiley

Faculty Publications

While previous research often finds flood impacts outside of conventional flood risk zones such as FEMA's 100-year floodplain maps, we have less of a sense of the social and demographic composition of the areas outside of floodplains that experience these impacts, even though social inequalities in flood risk and impacts more broadly is well-documented in the United States. Using data on 100-year floodplains, flood impacts, socio-demographic characteristics, and residential parcels, this study focuses on race as a primary marker of socio-spatial inequality to examine flooding inside and outside of floodplains during Hurricane Harvey in Greater Houston. Descriptive findings show that …

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Efficient Solvent-Free Microwave Irradiation Synthesis Of Highly Conductive Polypropylene Nanocomposites With Lowly Loaded Carbon Nanotubes, Xingru Yan, Jingjing Liu, Mojammel Alam Khan, Stephen Sheriff, Sravanthi Vupputuri, Rajib Das, Luyi Sun, David P. Young, Zhanhu Guo Sep 2020

Efficient Solvent-Free Microwave Irradiation Synthesis Of Highly Conductive Polypropylene Nanocomposites With Lowly Loaded Carbon Nanotubes, Xingru Yan, Jingjing Liu, Mojammel Alam Khan, Stephen Sheriff, Sravanthi Vupputuri, Rajib Das, Luyi Sun, David P. Young, Zhanhu Guo

Faculty Publications

It was well established that microwave radiation was utilized initially to enhance the electrical conductivity of polymer nanocomposites (PNCs) by introducing carbon nanotubes (CNTs) without using any solvent. High electrical conductivity was obtained in polypropylene (PP) nanocomposites with low CNTs loading levels. Under an inert gas protection, the CNTs were heated through the transformation of electromagnetic energy into mechanical vibrations. The surface of PP was easily molten by the heat generated by CNTs, then a well-formed CNTs network was built under proper microwave treatment period and subsequent hot pressing. CNTs loading levels and processing temperatures played an important role in …

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Experimental Demonstration Of Heat Loss And Turn-Down Ratio For A Multi-Panel, Actively Deployed Radiator, Rydge B. Mulford, Samuel D. Salt, Lance P. Hyatt, Kyle S. Meaker, Vivek H. Dwivedi, Matthew R. Jones, Brian D. Iverson Sep 2020

Experimental Demonstration Of Heat Loss And Turn-Down Ratio For A Multi-Panel, Actively Deployed Radiator, Rydge B. Mulford, Samuel D. Salt, Lance P. Hyatt, Kyle S. Meaker, Vivek H. Dwivedi, Matthew R. Jones, Brian D. Iverson

Faculty Publications

Origami-inspired, dynamic spacecraft radiators have been proposed which utilize an expandable/collapsible surface capable of large variations in emitting surface area. In this work, an experimental prototype of this concept is realized and its performance is analyzed. In particular, we demonstrate the capability of maintaining a spacecraft component at a desired operating temperature through the expansion and contraction of a collapsible radiator to control radiative heat loss. Four aluminum panels are connected via a flexible hinge constructed from interwoven copper wires and suspended from an actuating framework. The radiator panels are connected to a heated aluminum block. The radiator is placed …

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Gradient-Based Optimization Of Solar-Regenerative High-Altitude Long-Endurance Aircraft, Taylor Mcdonnell, Andrew Ning Sep 2020

Gradient-Based Optimization Of Solar-Regenerative High-Altitude Long-Endurance Aircraft, Taylor Mcdonnell, Andrew Ning

Faculty Publications

This paper uses gradient-based optimization to minimize the mass of a solar-regenerative high-altitude long-endurance (SR-HALE) flying-wing aircraft while accounting for nonlinear aeroelastic effects. The aircraft is designed to fly year round at 35° latitude at 18 km above sea level and subjected to energy capture, energy storage, material failure, local buckling, stall, longitudinal stability, and coupled flight and aeroelastic stability constraints. The optimized aircraft has an aspect ratio of 54.52, a surface area of 73.56 m2 , a mass of 349.5 kg, exhibits little aeroelastic deflection at the design airspeed, and is primarily stability constrained. Several parameter sweeps are performed …

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How To Improve The Mental Health Of Your Children, Alina M. Baltazar Sep 2020

How To Improve The Mental Health Of Your Children, Alina M. Baltazar

Faculty Publications

No abstract provided.

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Cost Analysis Of Optimized Islanded Energy Systems In A Dispersed Air Base Conflict, Jay F. Pearson, Torrey J. Wagner, Justin D. Delorit Sep 2020

Cost Analysis Of Optimized Islanded Energy Systems In A Dispersed Air Base Conflict, Jay F. Pearson, Torrey J. Wagner, Justin D. Delorit

Faculty Publications

The United States Air Force has implemented a dispersed air base strategy to enhance mission effectiveness for near-peer conflicts. Asset dispersal places many smaller bases across a wide geographic area, which increases resupply requirements and logistical complexity. Hybrid energy systems reduce resupply requirements through sustainable, off-grid energy production. This paper presents a novel hybrid energy renewable delivery system (HERDS) model capable of (1) selecting the optimal hybrid energy system design that meets demand at the lowest net present cost and (2) optimizing the delivery of the selected system using existing Air Force cargo aircraft. The novelty of the model’s capabilities …

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Building Implementation Science In Nutrition, Andrea M. Warren, Edward A. Frongillo Jr., Rahul Rawat Sep 2020

Building Implementation Science In Nutrition, Andrea M. Warren, Edward A. Frongillo Jr., Rahul Rawat

Faculty Publications

The field of nutrition has been investing in the development of many nutrition-specific and -sensitive policies and programs aimed at improving population-level malnutrition in all its forms. When there is a need to learn about a new system, programmatic context, or target population to understand how to effectively deploy an intervention to help improve nutrition, it is important to be able to ask a broad range of questions, both in topic and in scope. Our aim is to provide a simple and conceptually clear definition and principles to elaborate the science of implementation for nutrition to distinguish it from other …

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Assessing The Reliability Of Relevant Tweets And Validation Using Manual And Automatic Approaches For Flood Risk Communication, Xiaohui Liu, Bandana Kar, Francisco Alejandro Montiel Ishino, Chaoyang Zhang, Faustine Williams Sep 2020

Assessing The Reliability Of Relevant Tweets And Validation Using Manual And Automatic Approaches For Flood Risk Communication, Xiaohui Liu, Bandana Kar, Francisco Alejandro Montiel Ishino, Chaoyang Zhang, Faustine Williams

Faculty Publications

© 2020 by the authors. While Twitter has been touted as a preeminent source of up-to-date information on hazard events, the reliability of tweets is still a concern. Our previous publication extracted relevant tweets containing information about the 2013 Colorado flood event and its impacts. Using the relevant tweets, this research further examined the reliability (accuracy and trueness) of the tweets by examining the text and image content and comparing them to other publicly available data sources. Both manual identification of text information and automated (Google Cloud Vision, application programming interface (API)) extraction of images were implemented to balance accurate …

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Energy-Efficient Resource Allocation In Swipt Cooperative Wireless Networks, Shengjie Guo, Xiangwei Zhou, Xiangyun Zhou Sep 2020

Energy-Efficient Resource Allocation In Swipt Cooperative Wireless Networks, Shengjie Guo, Xiangwei Zhou, Xiangyun Zhou

Faculty Publications

In this article, energy-efficient resource allocation in simultaneous wireless information and power transfer (SWIPT) cooperative wireless networks is studied. With the transferred power, the SWIPT relays are adopted to improve the energy efficiency at the destination node. Two typical relay structures, decode-and-forward (DF) and amplify-and-forward (AF), are exploited for the optimal relay selection and power allocation with a power splitting SWIPT architecture. Nonconvex energy efficiency optimization problems are formulated for both DF and AF relay types. Based on the SNRs at the destination node, closed-form expressions of the optimal power splitting ratios are provided for DF and AF relays, respectively. …

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Video Game Development In A Rush: A Survey Of The Global Game Jam Participants, Markus Borg, Vahid Garousi, Anas Mahmoud, Thomas Olsson, Oskar Stalberg Sep 2020

Video Game Development In A Rush: A Survey Of The Global Game Jam Participants, Markus Borg, Vahid Garousi, Anas Mahmoud, Thomas Olsson, Oskar Stalberg

Faculty Publications

Video game development is a complex endeavor, often involving complex software, large organizations, and aggressive release deadlines. Several studies have reported that periods of 'crunch time' are prevalent in the video game industry, but there are few studies on the effects of time pressure. We conducted a survey with participants of the Global Game Jam (GGJ), a 48-h hackathon. Based on 198 responses, the results suggest the following: iterative brainstorming is the most popular method for conceptualizing initial requirements; continuous integration, minimum viable product, scope management, version control, and stand-up meetings are frequently applied development practices; regular communication, internal playtesting, …

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Reimagining Assessments In The Postpandemic Era: Creating A Blueprint For The Future, Keena Arbuthnot Sep 2020

Reimagining Assessments In The Postpandemic Era: Creating A Blueprint For The Future, Keena Arbuthnot

Faculty Publications

No abstract provided.

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Nonlinear Optical Measurements Of Cdsip2 At Near And Mid-Infrared Wavelengths, Manuel R. Ferdinandus, Jamie J. Gengler, Kent L. Averett, Kevin T. Zawilski, Peter G. Schunemann, Carl M. Liebig Sep 2020

Nonlinear Optical Measurements Of Cdsip2 At Near And Mid-Infrared Wavelengths, Manuel R. Ferdinandus, Jamie J. Gengler, Kent L. Averett, Kevin T. Zawilski, Peter G. Schunemann, Carl M. Liebig

Faculty Publications

We measure the birefringence of the nonlinear optical (NLO) properties of cadmium silicon phosphide via the Z-scan technique at near and mid-infrared wavelengths. We discuss the implications of the NLO properties on optical parametric amplifier performance. We find that the nonlinear absorption does reduce the conversion efficiency, while the nonlinear refraction has a negligible effect.

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Complex Assessment Of Relationship Quality Within Dyads, Wendy C. Birmingham, Maija Reblin, Allison A. Vaughn, Timothy W. Smith, Bert N. Uchino, Chandler M. Spahr Sep 2020

Complex Assessment Of Relationship Quality Within Dyads, Wendy C. Birmingham, Maija Reblin, Allison A. Vaughn, Timothy W. Smith, Bert N. Uchino, Chandler M. Spahr

Faculty Publications

Higher quality relationships have been linked to improved outcomes; however, the measurement of relationship quality often ignores its complexity and the possibility of co-occurring positivity and negativity across different contexts. The goal of this study is to test the added benefit of including multiple dimensions, contexts, and perspectives of relationship quality from both individuals in predicting marital functioning. The Social Relationships Index assessed positive and negative dimensions of relationship quality under neutral, positive, and support-seeking contexts for 183 heterosexual married couples. Models showed that the inclusion of multiple dimensions of relationship quality across all three contexts improved prediction of marital …

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Improving Adherence To Adjuvant Hormonal Therapy Among Disadvantaged Women Diagnosed With Breast Cancer In South Carolina: Proposal For A Multimethod Study, Tisha M. Felder, Sue Heiney, James R. Hébert, Daniela B. Friedman, Ronit Elk, Regina Franco, Lucy Gansauer, Barbara Christensen, Marvella E. Ford Sep 2020

Improving Adherence To Adjuvant Hormonal Therapy Among Disadvantaged Women Diagnosed With Breast Cancer In South Carolina: Proposal For A Multimethod Study, Tisha M. Felder, Sue Heiney, James R. Hébert, Daniela B. Friedman, Ronit Elk, Regina Franco, Lucy Gansauer, Barbara Christensen, Marvella E. Ford

Faculty Publications

Background: Current clinical guidelines recommend that hormone receptor-positive breast cancer survivors take adjuvant hormonal therapy (AHT) for 5 to 10 years, following the end of definitive treatment. However, fewer than half of patients adhere to the guidelines, and suboptimal adherence to AHT is associated with an increased risk of breast cancer mortality. Research has extensively documented sociodemographic and disease-specific factors associated with adherence to AHT, but very little evidence exists on behavioral factors (eg, knowledge, patient-provider communication) that can be modified and targeted by interventions. Objective: The goal of this study is to develop and test a theory-based, multilevel intervention …

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Handbook Of Research On Customer Engagement, Leticia Camacho Sep 2020

Handbook Of Research On Customer Engagement, Leticia Camacho

Faculty Publications

This handbook comprises studies by 69 contributors, most of them professors with PhDs. The book is organized into four parts, each comprising about a quarter of the 22 essays, each with its own references.

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Fatigue Of A Sic/Sic Ceramic Composite With An Ytterbium‐Disilicate Environmental Barrier Coating At Elevated Temperature, Marina B. Ruggles-Wrenn, Thaddeus M. Williams Sep 2020

Fatigue Of A Sic/Sic Ceramic Composite With An Ytterbium‐Disilicate Environmental Barrier Coating At Elevated Temperature, Marina B. Ruggles-Wrenn, Thaddeus M. Williams

Faculty Publications

Excerpt: Tension-tension fatigue performance of a SiC/SiC composite with an ytterbium-disilicate environmental barrier coating (EBC) was investigated at 1200°C in air and steam. The composite is reinforced with Hi-Nicalon™ SiC fibers and has a melt-infiltrated matrix processed by chemical vapor infiltration of SiC with subsequent infiltration with SiC particulate slurry and molten silicon. Abtract © American Ceramic Society

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A Signaling Theory Approach To Relationship Recovery, Hunsi Kharouf, Donald J. Lund, Alexandra Krallman, Chris Pullig Aug 2020

A Signaling Theory Approach To Relationship Recovery, Hunsi Kharouf, Donald J. Lund, Alexandra Krallman, Chris Pullig

Faculty Publications

Purpose: Drawing on signaling theory, the purpose of this study is to investigate the effects of the strength and framing of firm signals sent to repair relationships following relationship violations. Design/methodology/approach: Three 2 × 2 scenario-based experiments (total n = 527) manipulate signal strength × violation type (Study 1); signal frame × violation type (Study 2); and signal strength × brand familiarity (Study 3) to examine their dynamic impacts on relationship recovery efforts. Findings: Stronger signals are more effective at relationship repair and are especially important following integrity (vs competence) violations. Signals framed as customer gains (vs firm costs) lead …

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Reputation Systems Bias In The Platform Workplace, E. Gary Spitko Aug 2020

Reputation Systems Bias In The Platform Workplace, E. Gary Spitko

Faculty Publications

Online reputation systems enable the providers and consumers of a product or service to rate one another and allow others to rely upon those reputation scores in deciding whether to engage with a particular provider or consumer. Reputation systems are an intrinsic feature of the platform workplace, in which a platform operator, such as Uber or TaskRabbit, intermediates between the provider of a service and the consumer of that service. Operators typically rely upon consumer ratings of providers in rewarding and penalizing providers. Thus, these reputation systems allow an operator to achieve enormous scale while maintaining quality control and user …

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Immune And Microrna Responses To Infection And Indole-3-Carbinol During Colitis, Rasha Raheem Alkarkoushi, Yvonne Hui, Abbas S. Tavakoli, Udai Singh, Prakash Nagarkatti, Mitzi Nagarkatti, Ioulia Chatzistamou, Marpe Bam, Traci L. Testerman Aug 2020

Immune And Microrna Responses To Infection And Indole-3-Carbinol During Colitis, Rasha Raheem Alkarkoushi, Yvonne Hui, Abbas S. Tavakoli, Udai Singh, Prakash Nagarkatti, Mitzi Nagarkatti, Ioulia Chatzistamou, Marpe Bam, Traci L. Testerman

Faculty Publications

BACKGROUND: Indole-3-carbinol (I3C) and other aryl hydrocarbon receptor agonists are known to modulate the immune system and ameliorate various inflammatory and autoimmune diseases in animal models, including colitis induced by dextran sulfate sodium (DSS). MicroRNAs (miRNAs) are also gaining traction as potential therapeutic agents or diagnostic elements. Enterohepatic (EHH) species are associated with an increased risk of inflammatory bowel disease, but little is known about how these species affect the immune system or response to treatment. AIM: To determine whether infection with an EHH species alters the response to I3C and how the immune and miRNA responses of an EHH …

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Recommendations For Administrators’ Involvement In School-Based Health Promotion: A Scoping Review, Collin A. Webster, Genee Glascoe, Chanta Moore, Brian Dauenhauer, Cate A. Egan, Laura B. Russ, Karie Orendorff, Cathy Buschmeier Aug 2020

Recommendations For Administrators’ Involvement In School-Based Health Promotion: A Scoping Review, Collin A. Webster, Genee Glascoe, Chanta Moore, Brian Dauenhauer, Cate A. Egan, Laura B. Russ, Karie Orendorff, Cathy Buschmeier

Faculty Publications

School administrator involvement is recognized as a key factor in the extent to which school health promotion programs and initiatives are successfully implemented. The aims of this scoping review are to: (a) Identify existing documents that contain recommendations regarding the involvement of school administrators in school-based health promotion; (b) distill and summarize the recommendations; (c) examine differences in the recommendations by targeted professional level, professional group, health promotion content focus, and by whether the recommendations are evidence-based or opinion-based; and (d) evaluate the research informing the recommendations. We drew upon the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension …

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Cambridge Analytica's Black Box, Margaret Hu Aug 2020

Cambridge Analytica's Black Box, Margaret Hu

Faculty Publications

The Cambridge Analytica–Facebook scandal led to widespread concern over the methods deployed by Cambridge Analytica to target voters through psychographic profiling algorithms, built upon Facebook user data. The scandal ultimately led to a record-breaking $5 billion penalty imposed upon Facebook by the Federal Trade Commission (FTC) in July 2019. The FTC action, however, has been criticized as failing to adequately address the privacy and other harms emanating from Facebook’s release of approximately 87 million Facebook users’ data, which was exploited without user authorization. This Essay summarizes the FTC’s response to the Cambridge Analytica–Facebook scandal. It concludes that the scandal focuses …

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Multilayer Inse-Te Van Der Waals Heterostructures With An Ultrahigh Rectification Ratio And Ultrasensitive Photoresponse, Fanglu Qin, Feng Gao, Mingjin Dai, Yunxia Hu, Miaomiao Yu, Lifeng Wang, Wei Feng, Bin Li, Ping An Hu Aug 2020

Multilayer Inse-Te Van Der Waals Heterostructures With An Ultrahigh Rectification Ratio And Ultrasensitive Photoresponse, Fanglu Qin, Feng Gao, Mingjin Dai, Yunxia Hu, Miaomiao Yu, Lifeng Wang, Wei Feng, Bin Li, Ping An Hu

Faculty Publications

Multilayer van der Waals (vdWs) semiconductors have promising applications in high-performance optoelectronic devices. However, photoconductive photodetectors based on layered semiconductors often suffer from sizeable dark currents and high external driving bias voltages. Here, we report vertical van der Waals heterostructures (vdWHs) consisting of multilayer indium selenide (InSe) and tellurium (Te). The multilayer InSe-Te vdWH device shows a record high forward rectification ratio greater than 107 at room temperature. The vdWH device achieves an ultrasensitive and broadband photoresponse photodetector with an ultrahigh photo/dark current ratio over 104 and a high detectivity of 1013 Jones under visible light illumination with weak incident …

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Adapting A Picture Description Task For Grammatical Analysis In English–Spanish Bilingual Preschool Children, Vanesa Smith, Isabel Cano, Lisa Lozada, Connie Summers Aug 2020

Adapting A Picture Description Task For Grammatical Analysis In English–Spanish Bilingual Preschool Children, Vanesa Smith, Isabel Cano, Lisa Lozada, Connie Summers

Faculty Publications

The purpose of this study was to assess the use of an adapted picture description task described by Eisenberg and Guo to explore the morphosyntactic error patterns of English–Spanish preschool simultaneous bilingual learners. Language samples were collected from 28 bilingual preschool children aged 3 to 5 years. Language samples were elicited in both English and Spanish using a series of pictures and elicitation questions/prompts. Twenty-one participants produced a language sample in only one language (16 in English and 5 in Spanish) and seven participants produced language samples in both languages. Language samples were analyzed for grammaticality and error types. There …

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Using Personality-Based Propensity As A Guide For Teaching Practice, Lin-Miao L. Agler, Kelley Stricklin, Larisa K. Alfsen Aug 2020

Using Personality-Based Propensity As A Guide For Teaching Practice, Lin-Miao L. Agler, Kelley Stricklin, Larisa K. Alfsen

Faculty Publications

The Big Five-Factor personality traits are examined in the present review. Individual characteristics and personality types may contribute differently to choices of learning strategies and overall cognitive performance. The purpose of this paper is twofold: (1) to provide a brief overview of consistent research findings on personality constructs as predictors of school-related factors, including academic ability, reading and math skills, metacognitive assessments, self-regulatory learning and processing strategies, and students' confidence; and (2) to highlight the applicable value of using personality-related propensities to guide teachers in the classroom. Inter-relationships among personality, cognition, metacognition, self-regulation, and learning outcomes are addressed. More importantly, …

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An Exploratory Study To Understand Factors Associated With Health-Related Quality Of Life Among Uninsured/Underinsured Patients As Identified By Clinic Providers And Staff, Guillermo M. Wippold, Nwakaego Nmezi, Jaime L. Williams, Jacqueline Butler, Tanya M. Hodge Aug 2020

An Exploratory Study To Understand Factors Associated With Health-Related Quality Of Life Among Uninsured/Underinsured Patients As Identified By Clinic Providers And Staff, Guillermo M. Wippold, Nwakaego Nmezi, Jaime L. Williams, Jacqueline Butler, Tanya M. Hodge

Faculty Publications

Since the release of Healthy People 2020, there has been extensive research understanding factors associated with health-related quality of life (HRQoL) among specific populations. Despite this growing body of research, little has been conducted to understand the factors associated with HRQoL among uninsured/underinsured Americans. The purposes of the present study were to assess clinic staff to determine: (1) whether there is a need to examine HRQoL among uninsured/underinsured individuals, (2) whether there is a need for tailored HRQoL-promoting interventions among uninsured/underinsured individuals, and (3) the factors associated with HRQoL among uninsured/underinsured individuals. A survey was sent to an association of …

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Antarctica And The Southern Ocean, Jessica Blunden, Derek S. Arndt, E. Povl Abrahamsen, Sandra Barreira, Cecilia M. Bitz, Amy Butler, Kyle R. Clem, Steve Colwell, Lawrence Coy, Jos De Laat, Marcel D. Du Plessis, Ryan L. Fogt, Helen Amanda Fricker, John Fyfe, Alex S. Gardner, Sarah T. Gille, Tessa Gorte, L. Gregor, Will Hobbs, Bryan Johnson, Eric Keenan, Linda M. Keller, Natalya A. Kramarova, Matthew A. Lazzara, Jan T.M. Lenaerts, Jan L. Lieser, Hongxing Liu, Craig S. Long, Michelle Maclennan, Robert A. Massom, François Massonnet, Matthew R. Mazloff Aug 2020

Antarctica And The Southern Ocean, Jessica Blunden, Derek S. Arndt, E. Povl Abrahamsen, Sandra Barreira, Cecilia M. Bitz, Amy Butler, Kyle R. Clem, Steve Colwell, Lawrence Coy, Jos De Laat, Marcel D. Du Plessis, Ryan L. Fogt, Helen Amanda Fricker, John Fyfe, Alex S. Gardner, Sarah T. Gille, Tessa Gorte, L. Gregor, Will Hobbs, Bryan Johnson, Eric Keenan, Linda M. Keller, Natalya A. Kramarova, Matthew A. Lazzara, Jan T.M. Lenaerts, Jan L. Lieser, Hongxing Liu, Craig S. Long, Michelle Maclennan, Robert A. Massom, François Massonnet, Matthew R. Mazloff

Faculty Publications

No abstract provided.

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Sociopolitical Silos: Environmental Views And The Multiplicative Effect Of Same-Party Friends, Lawrence C. Hamilton, Joel Hartter, Curt Grimm Aug 2020

Sociopolitical Silos: Environmental Views And The Multiplicative Effect Of Same-Party Friends, Lawrence C. Hamilton, Joel Hartter, Curt Grimm

Faculty Publications

Analysis of climate and other environmental questions on three regional survey projects conducted over 2017–2020 (9,000+ interviews) elaborate on the well-known importance of political factors by adding support for three newer propositions. First, strength of political identification predicts climate-change views within the ranks of conservatives but not within ranks of liberals, evidence that conservatives’ climate-change views are more politically determined. Second, factor analysis suggests that climate-change beliefs meet statistical criteria for being an indicator of sociopolitical identity, alongside the traditional indicators of ideology and party, or the newer one of Trump support. This result calls for caution interpreting models that …

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Wideband Satcom Model: Evaluation Of Numerical Accuracy And Efficiency, Andrew J. Knisely, Andrew Terzuoli Aug 2020

Wideband Satcom Model: Evaluation Of Numerical Accuracy And Efficiency, Andrew J. Knisely, Andrew Terzuoli

Faculty Publications

The spectral method is typically applied as a simple and efficient method to solve the parabolic wave equation in phase screen scintillation models. The critical factors that can greatly affect the spectral method accuracy is the uniformity and smoothness of the input function. This paper observes these effects on the accuracy of the finite difference and the spectral methods applied to a wideband SATCOM signal propagation model simulated in the ultra-high frequency (UHF) band. The finite difference method uses local pointwise approximations to calculate a derivative. The spectral method uses global trigonometric interpolants that achieve remarkable accuracy for continuously differentiable …

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Wideband Satcom Model: Evaluation Of Numerical Accuracy And Efficiency, Andrew J. Knisely, Andrew J. Terzuoli Jr. Aug 2020

Wideband Satcom Model: Evaluation Of Numerical Accuracy And Efficiency, Andrew J. Knisely, Andrew J. Terzuoli Jr.

Faculty Publications

The spectral method is typically applied as a simple and efficient method to solve the parabolic wave equation in phase screen scintillation models. The critical factors that can greatly affect the spectral method accuracy is the uniformity and smoothness of the input function. This paper observes these effects on the accuracy of the finite difference and the spectral methods applied to a wideband SATCOM signal propagation model simulated in the ultra-high frequency (UHF) band. The finite difference method uses local pointwise approximations to calculate a derivative. The spectral method uses global trigonometric interpolants that achieve remarkable accuracy for continuously differentiable …

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