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Full-Text Articles in Social and Behavioral Sciences

Prodigal Children: Why Older Mothers Favor Their Once-Deviant Adult Children, Reilly Kincaid, Marissa Rurka, J. Jill Suitor, Megan Gilligan, Karl Pillemer, Liam Mohebbi, Nicholas Mundell Apr 2021

Prodigal Children: Why Older Mothers Favor Their Once-Deviant Adult Children, Reilly Kincaid, Marissa Rurka, J. Jill Suitor, Megan Gilligan, Karl Pillemer, Liam Mohebbi, Nicholas Mundell

Human Development and Family Studies Publications

Objectives Past research suggests that adult children who reform their deviant behaviors (i.e., problems with drugs/alcohol or the law) are more likely to become favored by their mothers, yet the reasons underlying this phenomenon are unclear. This study employs a longitudinal, qualitative approach to explore why adult children’s behavioral reforms shape changes in maternal favoritism.

Methods Analyses are based on qualitative interview data collected at two points seven years apart from older mothers regarding their adult children in 20 families. Each of these families had a “prodigal child”—a child for whom desistance from deviant behaviors between ...


A Multiperiod Consensus-Based Transactive Energy System For Unbalanced Distribution Networks, Rui Cheng, Leigh Tesfatsion, Zhaoyu Wang Apr 2021

A Multiperiod Consensus-Based Transactive Energy System For Unbalanced Distribution Networks, Rui Cheng, Leigh Tesfatsion, Zhaoyu Wang

Economics Working Papers

This study develops a consensus-based transactive energy system design managed by an independent distribution system operator (DSO) for an unbalanced radial distribution network. The network is populated by welfare-maximizing customers with price-sensitive and fixed (non-price-sensitive) demands who make multiple successive power decisions during each real-time operating period OP. The DSO and customers engage in an iterative negotiation process in advance of each OP to determine retail price-to-go sequences for OP that align customer power decisions with network reliability constraints in a manner that respects customer privacy. The convergence properties of a dual decomposition algorithm developed to implement this negotiation process ...


How To De-Reserve Reserves, Orhan Aygün, Bertan Turhan Apr 2021

How To De-Reserve Reserves, Orhan Aygün, Bertan Turhan

Economics Working Papers

Reserve systems have been designed and implemented for numerous real-world resource allocation problems. Often, de-reservation policies accompany reserve systems to prevent waste in instances of low demand for exclusive reserve categories. De-reservation policies must be executed carefully so that allocation mechanisms have desired properties. We evaluate the de-reservation policy that has been implemented in admissions to technical universities in India and reveal its shortcomings. We introduce two families of choice procedures—backward and forward transfers choice rules—and deferred acceptance mechanisms with respect to these choice rules to retrieve these shortcomings. We introduce a framework to compare choice rules on ...


Iowa State University Library Digital Preservation Policy, Iowa State University Library Apr 2021

Iowa State University Library Digital Preservation Policy, Iowa State University Library

University Library Policies

No abstract provided.


Judges And Forensic Science Education: A National Survey, Brandon L. Garrett, Brett O. Gardner, Evan Murphy, Patrick Grimes Apr 2021

Judges And Forensic Science Education: A National Survey, Brandon L. Garrett, Brett O. Gardner, Evan Murphy, Patrick Grimes

CSAFE Publications

In criminal cases, forensic science reports and expert testimony play an increasingly important role in adjudication. More states now follow a federal reliability standard, which calls upon judges to assess the reliability and validity of scientific evidence. Little is known about how judges view their own background in forensic scientific evidence, and what types of specialized training they receive on it. In this study, we surveyed 164 judges from 39 different U.S. states, who attended past trainings at the National Judicial College. We asked these judges about their background in forensic science, their views concerning the reliability of common ...


Broadening The Impact Of Plant Science Through Innovative, Integrative, And Inclusive Outreach, Joanna Friesner, Gustavo C. Macintosh, Et Al. Apr 2021

Broadening The Impact Of Plant Science Through Innovative, Integrative, And Inclusive Outreach, Joanna Friesner, Gustavo C. Macintosh, Et Al.

Biochemistry, Biophysics and Molecular Biology Publications

Population growth and climate change will impact food security and potentially exacerbate the environmental toll that agriculture has taken on our planet. These existential concerns demand that a passionate, interdisciplinary, and diverse community of plant science professionals is trained during the 21st century. Furthermore, societal trends that question the importance of science and expert knowledge highlight the need to better communicate the value of rigorous fundamental scientific exploration. Engaging students and the general public in the wonder of plants, and science in general, requires renewed efforts that take advantage of advances in technology and new models of funding and knowledge ...


A Composite Framework Of Co-Located Asymmetric Virtual Reality, Kaitlyn M. Ouverson, Stephen B. Gilbert Apr 2021

A Composite Framework Of Co-Located Asymmetric Virtual Reality, Kaitlyn M. Ouverson, Stephen B. Gilbert

Industrial and Manufacturing Systems Engineering Publications

As the variety of possible interactions with virtual reality (VR) continues to expand, researchers need a way to relate these interactions to users' needs and goals in ways that advance understanding. Existing efforts have focused mainly on the symmetric use of technology, which excludes a rising form of interaction known as asymmetric VR, in which co-located participants use different interfaces to interact with a shared environment. There must be a clear path to creating asymmetric VR systems that are rooted in previous work from several fields, as these systems have use cases in education, hybrid reality teams (using VR and ...


Agent-Based Computational Economics: Overview And Brief History, Leigh Tesfatsion Mar 2021

Agent-Based Computational Economics: Overview And Brief History, Leigh Tesfatsion

Economics Working Papers

Scientists seek to understand how real-world systems work. Models devised for scientific purposes must always simplify reality. However, scientists should be permitted to tailor these simplifications to purposes at hand; they should not be forced to distort reality in specific predetermined ways in order to apply a modeling approach. Adherence to this modeling precept was a key goal motivating my development of Agent-Based Computational Economics (ACE), a variant of agent-based modeling characterized by seven specific modeling principles. This perspective provides an overview of ACE and a brief history of its development.


Testing Identifying Assumptions In Bivariate Probit Models, Santiago Acerenza, Otávio Bartalotti, Desire Kedagni Mar 2021

Testing Identifying Assumptions In Bivariate Probit Models, Santiago Acerenza, Otávio Bartalotti, Desire Kedagni

Economics Working Papers

This paper focuses on the bivariate probit model's identifying
assumptions: joint normality of errors, instrument exogeneity, and relevance conditions. First, we develop novel sharp testable equalities that can detect all possible observable violations of the assumptions. Second, we propose an easy-to-implement testing procedure for the model's validity based on feasible testable implications using existing inference methods for intersection bounds. The test achieves correct empirical size for moderately sized samples and performs well in detecting violations of the conditions in Monte Carlo simulations. Finally, we provide researchers with a road map on what to do when the bivariate probit ...


Shared Language Erosion: Rethinking Immigrant Family Communication And Impacts On Youth Development, Ronald B. Cox Jr., Darcey K. Desouza, Juan Bao, Hua Lin, Sumeyra Sahbaz, Kimberly A. Greder, Robert E. Larzelere, Isaac J. Washburn, Maritza Leon-Cartagena, Alma Arredondo-Lopez Mar 2021

Shared Language Erosion: Rethinking Immigrant Family Communication And Impacts On Youth Development, Ronald B. Cox Jr., Darcey K. Desouza, Juan Bao, Hua Lin, Sumeyra Sahbaz, Kimberly A. Greder, Robert E. Larzelere, Isaac J. Washburn, Maritza Leon-Cartagena, Alma Arredondo-Lopez

Human Development and Family Studies Publications

In this paper we make the case for Shared Language Erosion as a potential explanation for the negative outcomes described in the immigrant paradox for second- and third- generation immigrants (e.g., declines in physical, mental, and behavioral health). While not negating the important role of cultural adaptation, we posit that parent-child communication difficulties due to a process we are calling Shared Language Erosion is driving the observed affects previously attributed to changes in cultural values and beliefs. Shared Language Erosion is the process during which adolescents improve their English skills while simultaneously losing or failing to develop their heritage ...


Interdisciplinary Strategies To Enable Data-Driven Plant Breeding In A Changing Climate, Aaron Kusmec, Zihao Zheng, Sotirios Archontoulis, Baskar Ganapathysubramanian, Guiping Hu, Lizhi Wang, Jianming Yu, Patrick S. Schnable Mar 2021

Interdisciplinary Strategies To Enable Data-Driven Plant Breeding In A Changing Climate, Aaron Kusmec, Zihao Zheng, Sotirios Archontoulis, Baskar Ganapathysubramanian, Guiping Hu, Lizhi Wang, Jianming Yu, Patrick S. Schnable

Mechanical Engineering Publications

This perspective lays out a framework to enable the breeding of crops that can meet worldwide demand under the challenges of global climate change. Past work in various fields has produced multiple prediction methods to contribute to different plant breeding objectives. Our proposed framework focuses on the integration of these methods into decision-support tools that quantify the effects on multiple objectives of decisions made throughout the plant breeding pipeline. We discuss the complementarities among these methods with an emphasis on integration into tools that utilize operations research and systems approaches to help plant breeders rapidly and optimally design new cultivars ...


Oer Content Sharing Template, Abbey Elder, Shannon M. Smith Mar 2021

Oer Content Sharing Template, Abbey Elder, Shannon M. Smith

Open Course Materials

The OER Content Sharing Template is a worksheet that can be shared with faculty to provide an overview of open access options for textbooks, articles & study aids, and multimedia resources.


Analysis Of Communication, Team Situational Awareness, And Feedback In A Three-Person Intelligent Team Tutoring System, Kaitlyn M. Ouverson, Alec G. Ostrander, Jamiahus Walton, Adam Kohl, Stephen B. Gilbert, Michael C. Dorneich, Eliot Winer, Anne M. Sinatra Mar 2021

Analysis Of Communication, Team Situational Awareness, And Feedback In A Three-Person Intelligent Team Tutoring System, Kaitlyn M. Ouverson, Alec G. Ostrander, Jamiahus Walton, Adam Kohl, Stephen B. Gilbert, Michael C. Dorneich, Eliot Winer, Anne M. Sinatra

Industrial and Manufacturing Systems Engineering Publications

This research assessed how the performance and team skills of three-person teams working with an Intelligent Team Tutoring System (ITTS) on a virtual military surveillance task were affected by feedback privacy, participant role, task experience, prior team experience, and teammate familiarity. Previous work in Intelligent Tutoring Systems (ITSs) has focused on outcomes for task skill training for individual learners. As research extends into intelligent tutoring for teams, both task skills and team skills are necessary for good team performance. This work includes a brief review of previous research on ITTSs, feedback, teams, and teamwork, including the recounting of two categories ...


Entry Under Placement Uncertainty, Sunanda Roy, Rajesh Singh, Quinn Weninger Feb 2021

Entry Under Placement Uncertainty, Sunanda Roy, Rajesh Singh, Quinn Weninger

Economics Working Papers

We present a model of firm entry in an industry that is managed with an aggregate production quota or cap-and-trade (CAT) regulation. Firms are heterogeneous in productivity; each knows its own costs of production but is uncertain about where its costs rank among an entrant population. Entry is modeled as a simultaneous move game with incomplete information. Under CAT, firms compete to secure shares of a fixed number of production permits. Entry payoffs are determined by own and rival entrant productivity. We derive the Bayesian Nash entry equilibrium and show conditions under which placement uncertainty leads to excess entry relative ...


Plurality, Borda Count And Preference Polarization, Sunanda Roy, Kuan Chuen Wu, Abhijit Chandra Feb 2021

Plurality, Borda Count And Preference Polarization, Sunanda Roy, Kuan Chuen Wu, Abhijit Chandra

Economics Working Papers

The paper uses the profile decomposition method which decomposes a
given profile of voters into hypothetical electorates, to explain
disagreement in the induced social rank orders of the candidates under
plurality and the Borda count. The family of component profiles responsible
for such disagreement are shown to possess a common, interesting feature: In
each such profile, a specific candidate is first and last ranked by an equal
number of voters. A significant weight of such a profile in the decomposition
indicates that the profile of real voters are polarized around the specific
candidate in question. The paper discusses a computationally ...


Summary And Overview Of The Odour Regulations Worldwide, Anna Bokowa, Carlos Diaz, Jacek A. Koziel, Michael Mcginley, Jennifer Barclay, Günther Schauberger, Jean-Michel Guillot, Robert Sneath, Laura Capelli, Vania Zorich, Cyntia Izquierdo, Ilse Bilsen, Anne-Claude Romain, Maria Del Carmen Cabeza, Dezhao Liu, Ralf Both, Hugo Van Belois, Takaya Higuchi, Landon Wahe Feb 2021

Summary And Overview Of The Odour Regulations Worldwide, Anna Bokowa, Carlos Diaz, Jacek A. Koziel, Michael Mcginley, Jennifer Barclay, Günther Schauberger, Jean-Michel Guillot, Robert Sneath, Laura Capelli, Vania Zorich, Cyntia Izquierdo, Ilse Bilsen, Anne-Claude Romain, Maria Del Carmen Cabeza, Dezhao Liu, Ralf Both, Hugo Van Belois, Takaya Higuchi, Landon Wahe

Agricultural and Biosystems Engineering Publications

When it comes to air pollution complaints, odours are often the most significant contributor. Sources of odour emissions range from natural to anthropogenic. Mitigation of odour can be challenging, multifaceted, site-specific, and is often confounded by its complexity—defined by existing (or non-existing) environmental laws, public ordinances, and socio-economic considerations. The objective of this paper is to review and summarise odour legislation in selected European countries (France, Germany, Austria, Hungary, the UK, Spain, the Netherlands, Italy, Belgium), North America (the USA and Canada), and South America (Chile and Colombia), as well as Oceania (Australia and New Zealand) and Asia (Japan ...


The Roles Of Gratitude And Guilt On Customer Satisfaction In Perceptions Of Service Failure And Recovery, Lishan Su, Sekar Raju, Russell N. Laczniak Feb 2021

The Roles Of Gratitude And Guilt On Customer Satisfaction In Perceptions Of Service Failure And Recovery, Lishan Su, Sekar Raju, Russell N. Laczniak

Marketing Publications

When service providers make an effort to recover from service failures, customers may respond more favorably at certain times as compared to other times. This article attempts to explain psychological mechanisms underlying this phenomenon. The results of a scenario experiment show that customer perception of successful recovery strategy can boost customer satisfaction to a higher level when customers believe the service failure outcome is due to self-behavior (i.e., have an internal locus of control) as compared to when they believe that is due to providers’ behavior. In this situation, satisfaction is developed via 1) customers’ feelings of gratitude toward ...


Willingness To Participate In Demand Response In The Us Midwest: A Market With Great Potential?, Abigail Morton, Yu Wang, Wendong Zhang Feb 2021

Willingness To Participate In Demand Response In The Us Midwest: A Market With Great Potential?, Abigail Morton, Yu Wang, Wendong Zhang

CARD Policy Briefs

Demand response uses smart technologies to lower peak electricity load by either shifting demand to non-peak hours or directly shaving peak demand. DR is a fast-growing market in which commercial and industrial customers are the primary providers of resources; however, DR helps heavy electrical consumers save energy and avoid demand charges, and it helps utilities save money and deter investment on expensive transmission and distribution lines. DR also has great potential to balance renewables by providing ramping and flexibility services to the electricity market. This capacity is increasingly important to electrical grids, as is the integration of more renewable energy.


Agricultural Innovation And Adaptation To Climate Change: Insights From Genetically Engineered Maize, Seungki Lee, Yongjie Ji, Giancarlo Moschini Feb 2021

Agricultural Innovation And Adaptation To Climate Change: Insights From Genetically Engineered Maize, Seungki Lee, Yongjie Ji, Giancarlo Moschini

CARD Working Papers

Climate change is one of the major threats to the global food supply, and adaptation by technological progress is believed to be essential. What is the scope of the required innovation tasks? To address this question, we estimate the yield gain in US maize production due to a major novel technology: genetically engineered (GE) varieties. Next, the yield model is used to extrapolate future expected yields given climate change projections from twenty large-scale models and two warming scenarios. We find that climate change entails significant yield shortfalls. The scale of these yield gaps, by the end of the century, ranges ...


Resilient Micropolitan Areas In The Face Of Economic Shocks: A Stakeholder Collective Capacity Perspective, Cristina Poleacovschi, Arielle True-Funk, Monica A. Haddad, David J. Peters Feb 2021

Resilient Micropolitan Areas In The Face Of Economic Shocks: A Stakeholder Collective Capacity Perspective, Cristina Poleacovschi, Arielle True-Funk, Monica A. Haddad, David J. Peters

Community and Regional Planning Publications

Micropolitan areas (between 10,000 and 50,000 people) are not immune to economic shocks that threaten their vitality. Factors related to economic shocks can range from local companies leaving a town or national economic crises affecting local economies. Using the perspective of local micropolitan area stakeholders, this research seeks to identify why certain micropolitan areas recover from an economic shock while others do not. The research included the case study of two micropolitan areas in the U.S. Midwest (one resilient and one vulnerable), based on 22 interviews with key stakeholders representing diverse for-profit and government organizations. Our results ...


Latent Print Comparison And Examiner Conclusions: A Field Analysis Of Case Processing In One Crime Laboratory, Brett O. Gardner, Sharon Kelley, Maddisen Neuman Feb 2021

Latent Print Comparison And Examiner Conclusions: A Field Analysis Of Case Processing In One Crime Laboratory, Brett O. Gardner, Sharon Kelley, Maddisen Neuman

CSAFE Publications

Scholarship on the latent print comparison process has expanded in recent years, responsive to the call for rigorous research by scholarly groups (e.g., National Academy of Sciences, 2009; President’s Council of Advisors on Science and Technology, 2016). Important to the task of ultimately improving accuracy, consistency, and efficiency in the field is understanding different workflows and case outcomes. The current study describes the casework completed by a latent print unit in a large laboratory during one calendar year (2018), including a unique workflow that involves Preliminary AFIS Associations reported out as investigative leads. Approximately 45% of all examined ...


Developing Farmer Typologies To Inform Conservation Outreach In Agricultural Landscapes, Suraj Upadhaya, J. Gordon Arbuckle, Lisa A. Schulte Feb 2021

Developing Farmer Typologies To Inform Conservation Outreach In Agricultural Landscapes, Suraj Upadhaya, J. Gordon Arbuckle, Lisa A. Schulte

Sociology Publications

Understanding factors that motivate conservation behavior among farmers is crucial to addressing societal, soil, water, and wildlife conservation goals. Farmers employ soil conservation practices to maintain agricultural productivity while minimizing impacts to water and wildlife in the long-term. The majority of conservation programs are voluntary in nature and some farmers are more willing and/or able to implement conservation practices than others. To inform the development of more effective conservation outreach and incentive programs, we created a farmer typology using data from three waves (2015, 2016, 2018) of a longitudinal survey of 358 farmers from Iowa, a highly productive agricultural ...


A Qualitative Analysis Of Barriers And Facilitators To Reducing Sedentary Time In Adults With Chronic Low Back Pain, Jeni E. Lansing, Laura D. Ellingson, Kathryn J. Deshaw, Gabriel Cruz-Maldonado, Tera R. Hurt, Jacob Meyer Jan 2021

A Qualitative Analysis Of Barriers And Facilitators To Reducing Sedentary Time In Adults With Chronic Low Back Pain, Jeni E. Lansing, Laura D. Ellingson, Kathryn J. Deshaw, Gabriel Cruz-Maldonado, Tera R. Hurt, Jacob Meyer

Human Development and Family Studies Publications

Background

Sedentary time (SED) is associated with many detrimental health outcomes, yet little is known about what factors influence one’s ability to reduce SED. Even less is known about these factors in specific patient populations for whom high levels of SED may influence symptoms, such as those with chronic low back pain (cLBP). The purpose of this study was to qualitatively explore participants’ perceptions of factors that influenced their ability to reduce SED across an 8-week intervention to reduce SED in adults with cLBP and elevated depressive symptoms.

Methods

Three months after a theory-based intervention to break up and ...


The Lavrion Mines: A Unique Site Of Geological And Mineralogical Heritage, Panagiotis Voudouris, Vasilios Melfos, Constantinos Mavrogonatos, Adonis Photiades, Eugenia Moraiti, Branko Rieck, Uwe Kolitsch, Alexandre Tarantola, Christophe Scheffer, Denis Morin, Olivier Vanderhaeghe, Paul G. Spry, James Ross, Konstantinos Soukis, Markos Vaxevanopoulos, Igor V. Pekov, Nikita V. Chukanov, Andreas Magganas, Marianna Kati, Athanasios Katerinopoulos, Stefanos Zaimis Jan 2021

The Lavrion Mines: A Unique Site Of Geological And Mineralogical Heritage, Panagiotis Voudouris, Vasilios Melfos, Constantinos Mavrogonatos, Adonis Photiades, Eugenia Moraiti, Branko Rieck, Uwe Kolitsch, Alexandre Tarantola, Christophe Scheffer, Denis Morin, Olivier Vanderhaeghe, Paul G. Spry, James Ross, Konstantinos Soukis, Markos Vaxevanopoulos, Igor V. Pekov, Nikita V. Chukanov, Andreas Magganas, Marianna Kati, Athanasios Katerinopoulos, Stefanos Zaimis

Geological and Atmospheric Sciences Publications

The Lavrion area corresponds to the western part of the Attic-Cycladic metamorphic belt, in the back-arc region of the active Hellenic subduction zone. Between the Eocene and the Miocene, metamorphic rocks (mainly marbles and schists) underwent several stages of metamorphism and deformation due to collision and collapse of the Cycladic belt. Exhumation during the Miocene was accommodated by the movement of a large-scale detachment fault system, which also enhanced emplacement of magmatic rocks, leading to the formation of the famous Lavrion silver deposits. The area around the mines shows the stacking of nappes, with ore deposition mainly localized within the ...


Lake Atitlan: A Review Of The Food, Energy, And Water Sustainability Of A Mountain Lake In Guatemala, Timothy P. Neher, Michelle L. Soupir, Rameshwar S. Kanwar Jan 2021

Lake Atitlan: A Review Of The Food, Energy, And Water Sustainability Of A Mountain Lake In Guatemala, Timothy P. Neher, Michelle L. Soupir, Rameshwar S. Kanwar

Agricultural and Biosystems Engineering Publications

This paper summarizes the findings of an extensive review of literature that was conducted to understand the historical state of the food, energy, and water nexus in the Lake Atitlan basin and to recommend incentive-based, long-term sustainable policies to become a significant driver to Guatemala’s tourism industry and GDP growth. The SWAT (Soil and Water Assessment Tool) was implemented in the basin to work towards the goal of simulating nutrient loading. A key conclusion of this review study is for the local population to have advocacy for the “zero wastewater discharge to Lake Atitlan” initiative to bring long-term benefits ...


Transdisciplinary Translational Science For Youth Health And Wellness: Introduction To A Special Issue, Ashley T. Scuddern, Gregory J. Welk, Richard Spoth, Constance C. Beecher, Michael C. Dorneich, Jacob D. Meyer, L. Alison Phillips, Carl F. Weems Jan 2021

Transdisciplinary Translational Science For Youth Health And Wellness: Introduction To A Special Issue, Ashley T. Scuddern, Gregory J. Welk, Richard Spoth, Constance C. Beecher, Michael C. Dorneich, Jacob D. Meyer, L. Alison Phillips, Carl F. Weems

Psychology Publications

Background: Transdisciplinary translational science applies interdisciplinary approaches to the generation of novel concepts, theories and methods involving collaborations among academic and non-academic partners, in order to advance the translation of science into broader community practice.

Objective: This paper introduces a special issue on transdisciplinary translational science for youth health and wellness. We provide an overview of relevant research paradigms, share the related goals of the Iowa State University Translational Research Network (U-TuRN), and introduce the specific papers in the issue.

Method: Authors were asked to submit empirical reports, programmatic reviews or policy-related papers that examined youth health issues from a ...


Springer Nature 2021-2023 Iowa State, Springer Nature, Iowa State University Of Science And Technology Jan 2021

Springer Nature 2021-2023 Iowa State, Springer Nature, Iowa State University Of Science And Technology

Publisher Agreements

No abstract provided.


Wiley 2021-2023 Iowa State Oa, John Wiley & Sons, Inc., Iowa State University Of Science And Technology Jan 2021

Wiley 2021-2023 Iowa State Oa, John Wiley & Sons, Inc., Iowa State University Of Science And Technology

Publisher Agreements

No abstract provided.


The Effectiveness Of Locomotion Interfaces Depends On Self-Motion Cues, Environmental Cues, And The Individual, Jonathan W. Kelly, Stephen B. Gilbert Jan 2021

The Effectiveness Of Locomotion Interfaces Depends On Self-Motion Cues, Environmental Cues, And The Individual, Jonathan W. Kelly, Stephen B. Gilbert

Industrial and Manufacturing Systems Engineering Publications

The proliferation of locomotion interfaces for virtual reality necessitates a framework for predicting and evaluating navigational success. Spatial updating---the process of mentally updating one's self-location during locomotion---is a core component of navigation, is easy to measure, and is sensitive to common elements of locomotion interfaces. This paper highlights three factors that influence spatial updating: body-based self-motion cues, environmental cues, and characteristics of the individual. The concordance framework, which characterizes locomotion interfaces based on agreement between body movement and movement through the environment, serves as a useful starting point for understanding the effectiveness of locomotion interfaces for enabling accurate navigation.


Management Of Multiple Sources Of Risk In Livestock Production, Melissa G. S. Mckendree, Glynn T. Tonsor, Lee L. Schulz Jan 2021

Management Of Multiple Sources Of Risk In Livestock Production, Melissa G. S. Mckendree, Glynn T. Tonsor, Lee L. Schulz

Economics Publications

Firm operators continually manage multiple sources of risk. In an application to cattle feedlot operations, our objective is to determine if producers view output price and animal health risks separately or jointly. We conduct a survey with a choice experiment placing operators in forward looking, decision-making scenarios, and capture information on past risk management approaches. Evidence regarding a relationship between animal health and output price risk mitigation is mixed and depends on the decision being made. Combined, these results provide new insight into how managers approach multiple risks when facing resource constraints.