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2021

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Full-Text Articles in Physical Sciences and Mathematics

Factors Affecting The Productivity And Satisfaction Of Virtual Workers, Teresa Peoples Jan 2021

Factors Affecting The Productivity And Satisfaction Of Virtual Workers, Teresa Peoples

Walden Dissertations and Doctoral Studies

Advancements in technology have ushered in new digital enterprises, shifting the trend from a conventional workforce to a virtual workforce and giving rise to new challenges for managers. However, the factors affecting virtual worker productivity and job satisfaction are not well known. The purpose of this study was to identify these factors and determine what managers can do to enhance them. The theoretical foundation for this study included sociotechnical theory and content theory as they relate to the motivation and communication needs of the virtual workforce. This qualitative phenomenological study was an exploration of factors that affect virtual workers' productivity …

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The Digitization Of Court Processes In African Regional And Subregional Judicial Institutions, Frederic Drabo Jan 2021

The Digitization Of Court Processes In African Regional And Subregional Judicial Institutions, Frederic Drabo

Walden Dissertations and Doctoral Studies

Despite information technology (IT) officers’ multiple efforts to develop reliable and efficient electronic justice (e-justice) systems, digitizing court processes still presents several quality challenges associated with IT infrastructure and literacy issues. Grounded in the principles of total quality management, the purpose of this qualitative multiple case study was to identify strategies and best practices IT officers in African regional economic communities (REC) use for digitizing regional and subregional court processes to improve African e-justice systems. The participants included four IT officers working as assistant computer system analysts (ACSA), computer system analysts (CSA), and heads of IT (HIT) in regional and …

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Mobile Technology Use By Rural Farmers And Herders, Mohamed Ali Jan 2021

Mobile Technology Use By Rural Farmers And Herders, Mohamed Ali

Walden Dissertations and Doctoral Studies

Mobile technology business leaders from many mobile technology companies practice digital apartheid when improving rural farmers' communication and technology infrastructure in developing countries. Mobile technology business leaders who do not effectively plan mobile technology infrastructure deployment to rural farmers and herders are at a high risk of failure. Grounded in adaptive structuration theory of technology, the purpose of this qualitative multiple case study was to explore strategies mobile technology business leaders used to improve the mobile technology infrastructure for rural farmers and herders in the United Republic of Tanzania. The participants comprised three mobile technology business leaders from three different …

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User Awareness And Knowledge Of Cybersecurity And The Impact Of Training In The Commonwealth Of Dominica, Jermaine Jewel Jean-Pierre Jan 2021

User Awareness And Knowledge Of Cybersecurity And The Impact Of Training In The Commonwealth Of Dominica, Jermaine Jewel Jean-Pierre

Walden Dissertations and Doctoral Studies

The frequency of cyberattacks against governments has increased at an alarming rate and the lack of user awareness and knowledge of cybersecurity has been considered a contributing factor to the increase in cyberattacks and cyberthreats. The purpose of this quantitative experimental study was to explore the role and effectiveness of employee training focused on user awareness of cyberattacks and cybersecurity, with the intent to close the gap in understanding about the level of awareness of cybersecurity within the public sector of the Commonwealth of Dominica. The theoretical framework was Bandura’s social cognitive theory, following the idea that learning occurs in …

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Strategies For Integrating The Internet Of Things In Educational Institutions, Anthony Kofi Harvey Jan 2021

Strategies For Integrating The Internet Of Things In Educational Institutions, Anthony Kofi Harvey

Walden Dissertations and Doctoral Studies

The introduction of the Internet of Things (IoT) into educational institutions has necessitated the integration of IoT devices in the information technology (IT) infrastructural environment of educational institutions. Many IT leaders at educational institutions, however, lack strategies for integrating and deploying IoT devices in their institutions, which has resulted in numerous security breaches. The purpose of this study was to explore security strategies adopted by IT administrators to prevent data breaches resulting from the integration of IoT devices in their educational institutions. The diffusion of innovations theory served as the conceptual framework for this qualitative multiple case study. Eleven IT …

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Strategies To Protect Against Security Violations During The Adoption Of The Internet Of Things By Manufacturers, Sixtus Anayochukwu Ekwo Jan 2021

Strategies To Protect Against Security Violations During The Adoption Of The Internet Of Things By Manufacturers, Sixtus Anayochukwu Ekwo

Walden Dissertations and Doctoral Studies

Security violations have been one of the key factors affecting manufacturers in adopting the Internet of Things (IoT). The corporate-level information technology (IT) leaders in the manufacturing industry encounter issues when adopting IoT due to security concerns because they lack strategies to protect against security violations. Grounded in Roger’s diffusion of innovations theory, the purpose of this qualitative multiple case study was to explore strategies corporate-level IT leaders use in protecting against security violations while adopting IoT for manufacturers. The participants were senior IT leaders in the eastern region of the United States. The data collection process included interviews with …

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Exploring The Value Of Technology Within Cross-Departmental Communications, Brian J. Luckey Jan 2021

Exploring The Value Of Technology Within Cross-Departmental Communications, Brian J. Luckey

Walden Dissertations and Doctoral Studies

While many midsized businesses have invested in technology to support business operations, most have not realized the potential value of using technology to collaborate cross-departmentally. There is a lack of knowledge concerning strategies for using technology to facilitate effective organizational communications, which has resulted in operating technology investments being made without corresponding investments in communication technologies. The purpose of this qualitative case study was to fill the knowledge gap concerning the impact of technology for cross-departmental communications. The theoretical foundation for this study was based on systems theory, organizational theory, and stakeholder theory. The key research question involved the impact …

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Insider Threats' Behaviors And Data Security Management Strategies, Gladys C. Cooley Jan 2021

Insider Threats' Behaviors And Data Security Management Strategies, Gladys C. Cooley

Walden Dissertations and Doctoral Studies

As insider threats and data security management concerns become more prevalent, the identification of risky behaviors in the workplace is crucial for the privacy of individuals and the survival of organizations. The purpose of this three-round qualitative Delphi study was to identify real-time consensus among 25 information technology (IT) subject matter experts (SMEs) in the Washington metropolitan area about insider threats and data security management. The SMEs participating in this study were adult IT professionals and senior managers with certification in their area of specialization and at least 5 years of practical experience. The dark triad theory was the conceptual …

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Multigenerational Family Firm Succession Planning For Transgenerational Sustainability, Janine Michelle Moore-Williams Jan 2021

Multigenerational Family Firm Succession Planning For Transgenerational Sustainability, Janine Michelle Moore-Williams

Walden Dissertations and Doctoral Studies

AbstractFamily firm businesses represent 90% of the global economy and have a 70% first-generation failure rate; business sustainability could have a tremendous impact on the U.S. economy. Grounded in the sustainable family business theory, the purpose of this qualitative multiple case study was to explore strategies used by four California-based, multigenerational family firm leaders who successfully implemented succession planning processes to transfer leadership of their family firm. Data were collected by reviewing firm documents, public information, and semistructured interviews. Data were analyzed using thematic analysis and methodological triangulation, and five themes emerged: leader strategies to implement succession planning, strategies for …

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Factors For Consideration In A Plan For Terrestrial Oil Disaster Mitigation, Olaniyi O. Oyebode Jan 2021

Factors For Consideration In A Plan For Terrestrial Oil Disaster Mitigation, Olaniyi O. Oyebode

Walden Dissertations and Doctoral Studies

Oil spills, are common disasters associated with hydrocarbon exploration and production, can be devastating and severely impact water quality, which can be detrimental to human life and the environment. One of the primary objectives of oil spill planning and response, aside from protecting human beings, is to reduce the environmental consequences of spills and cleanup efforts. This objective is best achieved by responders identifying sensitive resources ahead of time to establish protection priorities and select cleanup strategies. When a plan is well situated, within the limited hours available to respond, responders will not have to contact all of the various …

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Impact Of Case Management On Childhood Lead Exposure In Marion County, Indiana, Maliki Yacouba Jan 2021

Impact Of Case Management On Childhood Lead Exposure In Marion County, Indiana, Maliki Yacouba

Walden Dissertations and Doctoral Studies

The Centers for Disease Control and Prevention recently declared that no amount of childhood blood lead level (BLL) is safe. The purpose of this quantitative study with a retrospective cohort design was to evaluate the effectiveness of case management intervention on children diagnosed with elevated BLL (EBLL; ≥ 5 μg/dL) in Marion, County, Indiana. The health belief model was used as the theoretical foundation for the study. A data set of 160 lead exposure case management records was analyzed to find whether: (a) BLL at post-case-management time significantly differ from BLL at baseline (b) BLL at post-case-management time is affected …

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Teacher Perceptions Of Using Standards-Based Rubrics For Monitoring Student Growth In Teacher Evaluation, Jennette Susan Winters Jan 2021

Teacher Perceptions Of Using Standards-Based Rubrics For Monitoring Student Growth In Teacher Evaluation, Jennette Susan Winters

Walden Dissertations and Doctoral Studies

In the United States, national and state legislative mandates have forced school districts to include student growth measures in teacher evaluation systems. However, statistical models for monitoring student growth on standardized tests have not been found to foster teachers’ reflective practice or pedagogical content knowledge and goal-based models have been found to lack adequate structure for supporting implementation. This basic qualitative inquiry explored how teachers perceive using standards-based rubrics to monitor student growth for teacher evaluation influences their reflective practice and pedagogical content knowledge in mathematics. Nine teachers who have used standards-based rubrics to monitor student growth were recruited through …

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Oscillation Tests For Nonlinear Differential Equations With Nonmonotone Delays, Nurten Kiliç Jan 2021

Oscillation Tests For Nonlinear Differential Equations With Nonmonotone Delays, Nurten Kiliç

Turkish Journal of Mathematics

In this paper, our aim is to investigate a class of first-order nonlinear delay differential equations with several deviating arguments. In addition, we present some sufficient conditions for the oscillatory solutions of these equations. Differing from other studies in the literature, delay terms are not necessarily monotone. Finally, we give examples to demonstrate the results.

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Investigations Into The Genetics Of Mixed Pathologies In Dementia, Adam Dugan Jan 2021

Investigations Into The Genetics Of Mixed Pathologies In Dementia, Adam Dugan

Theses and Dissertations--Epidemiology and Biostatistics

Alzheimer’s disease (AD) is an irreversible, progressive brain disorder that leads to a loss of memory and thinking skills. While tremendous progress has been made in our understanding of the genetics underlying AD, currently known genetic variants explain only approximately 30% of the heritable risk of developing AD. One hurdle to AD research is that it can only be definitively diagnosed at autopsy, making cruder, clinic-based diagnoses more common. In recent years, several brain pathologies that mimic AD’s clinical presentation have been identified including brain arteriolosclerosis, hippocampal sclerosis (HS), and, most recently, limbic-predominant age-related TDP-43 encephalopathy (LATE). It has become …

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Law Library Blog (January 2021): Legal Beagle's Blog Archive, Roger Williams University School Of Law Jan 2021

Law Library Blog (January 2021): Legal Beagle's Blog Archive, Roger Williams University School Of Law

Law Library Newsletters/Blog

No abstract provided.

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The Future Of Living: Exploring Sustainable Residential Developments Through A Case Study Analysis Of The Sustainable City Dubai, Carys Davidson-Huxley Jan 2021

The Future Of Living: Exploring Sustainable Residential Developments Through A Case Study Analysis Of The Sustainable City Dubai, Carys Davidson-Huxley

Honors Program Theses

With population growth continuing on an upwards trend and urban living projected to increase in the coming years, a redesign of typical property development is required to ensure that housing demand not only has a lesser impact on the environment, but also meets the needs of communities. Through a combination of literature review, quantitative and qualitative data analysis, this paper presents a case study of The Sustainable City Dubai (TSC), a key sustainable development within the United Arab Emirates (UAE), taking into account its social, economic and environmental strategies and consequent impacts. Investigation has been conducted into the importance of …

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Synthesis Of A Series Of Ag(I)-Nhc Complexes For Future Antibacterial Studies, Alyssa Malto Jan 2021

Synthesis Of A Series Of Ag(I)-Nhc Complexes For Future Antibacterial Studies, Alyssa Malto

Honors Program Theses

For thousands of years, silver (Ag) has been widely used for medicinal purposes due to its broad-spectrum antimicrobial properties. While medicinal silver usage declined with the advent of antibiotics, there has been a renewed interest in therapeutic silver coordination compounds to combat the spread of antibiotic resistance. N-heterocyclic carbenes (NHCs) are promising ligands for silver metallodrugs due to their wide structural variety that allows for tunability of the complex’s overall steric and electronic properties and previously established bioactivity against various pathogens and cancer cell lines. There is potential for efficacy against biofilms, a type of microbial growth pattern that is …

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Convergent Synthesis Of Anaephene B, Megan Johnson Jan 2021

Convergent Synthesis Of Anaephene B, Megan Johnson

Honors Program Theses

Many organisms are capable of producing organic compounds as secondary metabolites; these natural products can be quite pharmaceutically and medicinally relevant.1 Typically, the more unique an organism, the more unique its secondary metabolites. Cyanobacteria, an abundant microalgal organism, is capable of producing a myriad of novel natural products.2 The unique photosynthetic and autotrophic properties of cyanobacteria allow for the production of many secondary metabolites, including lipopeptides, amino acids, fatty acids, macrolides, amides, and others.2,3 Staphylococcus aureus is one the most common bacterial infections in the world.4 S. aureus produces a number of metabolites that inhibit host immune responses.4 As a …

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Cayley Map Embeddings Of Complete Graphs, Miriam Scheinblum Jan 2021

Cayley Map Embeddings Of Complete Graphs, Miriam Scheinblum

Honors Program Theses

This paper looks at Cayley map embeddings of complete graphs on orientable surfaces. Cayley maps constrain graph embeddings to those with cyclical edge rotations, so optimal embeddings on surfaces with the minimum genus may not always be possible. We explore instances when Cayley maps succeed at optimally embedding complete graphs, and when optimal embeddings are not possible, we determine how close to optimal they can get by finding vertex rotations that result in the smallest possible genus. Many of the complete graphs we consider have prime numbers of vertices, so for each complete graph Kn we focus on mappings with …

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Entropy In Music: An Analysis Of Shape Note Music In Terms Of Information Entropy, Kyle Major Jan 2021

Entropy In Music: An Analysis Of Shape Note Music In Terms Of Information Entropy, Kyle Major

Honors Program Theses

This paper will be centered on a case study designed to probe a possible objective method for analyzing music that has already proven itself in the analysis computational systems: information theory. More specifically, this study has been conducted through the collection of data on information entropy in the genre of shape note music. The genre of shape note music has been chosen for its relative simplicity compared to other genres such as the classical symphony, which will render it significantly easier to analyze objectively. Information entropy as proposed by Claude Shannon, makes an excellent method for objective analysis because it …

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Dynamic Manipulation Of Droplets Using Mechanically Tunable Microtextured Chemical Gradients, Ali J. Mazaltarim, John J. Bowen, Jay M. Taylor, Stephen Morin Jan 2021

Dynamic Manipulation Of Droplets Using Mechanically Tunable Microtextured Chemical Gradients, Ali J. Mazaltarim, John J. Bowen, Jay M. Taylor, Stephen Morin

Chemistry Department: Faculty Publications

Materials and strategies applicable to the dynamic transport of microdroplets are relevant to surface fluidics, self-cleaning materials, thermal management systems, and analytical devices. Techniques based on electrowetting, topographic micropatterns, and thermal/chemical gradients have advanced considerably, but dynamic microdroplet transport remains a challenge. This manuscript reports the fabrication of mechano-tunable, microtextured chemical gradients on elastomer films and their use in controlled microdroplet transport. Specifically, discreet mechanical deformations of these films enabled dynamic tuning of the microtextures and thus transport along surface-chemical gradients. The interplay between the driving force of the chemical gradient and the microtopography was characterized, facilitating accurate prediction of …

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After The A-Bomb, Simone Solondz, Center For Complexity Jan 2021

After The A-Bomb, Simone Solondz, Center For Complexity

Horizon 2045

RISD’s Center for Complexity launches Horizon 2045, a 25-year project aimed at eliminating the threat of nuclear war.

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Terrestrial Ecological Risk Analysis Via Dietary Exposure At Uranium Mine Sites In The Grand Canyon Watershed (Arizona, Usa), Jo Ellen Hinck, Danielle Cleveland, Bradley E. Sample Jan 2021

Terrestrial Ecological Risk Analysis Via Dietary Exposure At Uranium Mine Sites In The Grand Canyon Watershed (Arizona, Usa), Jo Ellen Hinck, Danielle Cleveland, Bradley E. Sample

United States Geological Survey: Staff Publications

The U.S. Department of the Interior recently included uranium (U) on a list of mineral commodities that are considered critical to economic and national security. The uses of U for commercial and residential energy production, defense applications, medical device technologies, and energy generation for space vehicles and satellites are known, but the environmental impacts of uranium extraction are not always well quantified. We conducted a screening-level ecological risk analysis based on exposure to miningrelated elements via diets and incidental soil ingestion for terrestrial biota to provide context to chemical characterization and exposures at breccia pipe U mines in northern Arizona. …

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Managing For Radical Ecosystem Change: Applying The Resist-Accept- Direct (Rad) Framework, Abigail J. Lynch, Laura M. Thompson, Erik A. Beever, David N. Cole, Augustin C. Engman, Cat Hawkins Hoffman, Stephen T. Jackson, Trevor J. Krabbenhoft, David J. Lawrence, Douglas Limpinsel, Robert T. Magill, Tracy A. Melvin, John M. Morton, Robert A. Newman, Jay O. Peterson, Mark T. Porath, Frank J. Rahel, Gregor W. Schuurman, Suresh A. Sethi, Jennifer L. Wilkening Jan 2021

Managing For Radical Ecosystem Change: Applying The Resist-Accept- Direct (Rad) Framework, Abigail J. Lynch, Laura M. Thompson, Erik A. Beever, David N. Cole, Augustin C. Engman, Cat Hawkins Hoffman, Stephen T. Jackson, Trevor J. Krabbenhoft, David J. Lawrence, Douglas Limpinsel, Robert T. Magill, Tracy A. Melvin, John M. Morton, Robert A. Newman, Jay O. Peterson, Mark T. Porath, Frank J. Rahel, Gregor W. Schuurman, Suresh A. Sethi, Jennifer L. Wilkening

United States Geological Survey: Staff Publications

Ecosystem transformation involves the emergence of persistent ecological or social–ecological systems that diverge, dramatically and irreversibly, from prior ecosystem structure and function. Such transformations are occurring at increasing rates across the planet in response to changes in climate, land use, and other factors. Consequently, a dynamic view of ecosystem processes that accommodates rapid, irreversible change will be critical for effectively conserving fish, wildlife, and other natural resources, and maintaining ecosystem services. However, managing ecosystems toward states with novel structure and function is an inherently unpredictable and difficult task. Managers navigating ecosystem transformation can benefit from considering broader objectives, beyond a …

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Ecology Of An Isolated Muskrat Population During Regional Population Declines, Laken S. Ganoe, Matthew J. Lovallo, Justin D. Brown, W. David Walter Jan 2021

Ecology Of An Isolated Muskrat Population During Regional Population Declines, Laken S. Ganoe, Matthew J. Lovallo, Justin D. Brown, W. David Walter

United States Geological Survey: Staff Publications

Evidence indicating a decline in Ondatra zibethicus (Muskrat) populations in the United States during the past 40 years has led to speculation regarding factors influencing Muskrat survival. In order to understand population dynamics and survival, it is important to first define the ecology of local populations. We investigated the dwelling structure use, movements, home range, and survival of radio-tagged Muskrats (n = 14) in an urban wetland complex in central Pennsylvania. We used locations collected from intensive radio-telemetry monitoring to determine number of lodging structures used, hourly movement, and size and percent area overlap of home ranges. Muskrats shared …

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Energy-Dependent Π⁺Π⁺Π⁺ Scattering Amplitude From Qcd, Maxwell T. Hansen, Raúl A. Briceño, Robert G. Edwards, Christopher E. Thomas, David J. Wilson Jan 2021

Energy-Dependent Π⁺Π⁺Π⁺ Scattering Amplitude From Qcd, Maxwell T. Hansen, Raúl A. Briceño, Robert G. Edwards, Christopher E. Thomas, David J. Wilson

Physics Faculty Publications

Focusing on three-pion states with maximal isospin π⁺π⁺π⁺, we present the first nonperturbative determination of an energy-dependent three-hadron scattering amplitude from first-principles QCD. The calculation combines finite-volume three-hadron energies, extracted using numerical lattice QCD, with a relativistic finite-volume formalism, required to interpret the results. To fully implement the latter, we also solve integral equations that relate an intermediate three-body K matrix to the physical three-hadron scattering amplitude. The resulting amplitude shows rich analytic structure and a complicated dependence on the two-pion invariant masses, represented here via Dalitz-like plots of the scattering rate.

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Fermi Questions, Question 1: Light Bulb Photons; Question 2: Light Bulbs, Larry Weinstein Jan 2021

Fermi Questions, Question 1: Light Bulb Photons; Question 2: Light Bulbs, Larry Weinstein

Physics Faculty Publications

No abstract provided.

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Effect Of Random Pinning On Nonlinear Dynamics And Dissipation Of A Vortex Driven By A Strong Microwave Current, W.P.M.R. Pathirana, Alex Gurevich Jan 2021

Effect Of Random Pinning On Nonlinear Dynamics And Dissipation Of A Vortex Driven By A Strong Microwave Current, W.P.M.R. Pathirana, Alex Gurevich

Physics Faculty Publications

We report numerical simulations of a trapped elastic vortex driven by a strong ac magnetic field H(t)=Hsinωt parallel to the surface of a superconducting film. The surface resistance and the power dissipated by an oscillating vortex perpendicular to the film surface were calculated as functions of H and ω for different spatial distributions, densities, and strengths of pinning centers, including bulk pinning, surface pinning, and cluster pinning. Our simulations were performed for both the Bardeen-Stephen viscous vortex drag and the Larkin-Ovchinnikov (LO) drag coefficient η(v) decreasing with the vortex velocity v. The local residual surface resistance Ri(H) …

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Consistency Checks For Two-Body Finite-Volume Matrix Elements: Conserved Currents And Bound States, Raúl A. Briceño, Christopher J. Monahan Jan 2021

Consistency Checks For Two-Body Finite-Volume Matrix Elements: Conserved Currents And Bound States, Raúl A. Briceño, Christopher J. Monahan

Physics Faculty Publications

We present a model-independent framework to determine finite-volume corrections of matrix elements of spatially separated current-current operators. We define these matrix elements in terms of Compton-like amplitudes, i.e., amplitudes coupling single-particle states via two current insertions. We show that the infrared behavior of these matrix elements is dominated by the single-particle pole, which is approximated by the elastic form factors of the lowest-lying hadron. Therefore, given lattice data on the relevant elastic form factors, the finite-volume effects can be estimated nonperturbatively and without recourse to effective field theories. For illustration purposes, we investigate the implications of the proposed formalism for …

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Intense Monochromatic Photons Above 100 Kev From An Inverse Compton Source, Kirsten Deitrick, Georg H. Hoffstaetter, Carl Franck, Bruno D. Muratori, Peter H. Williams, Geoffrey A, Krafft, Balša Terzić, Joe Crone, Hywel Owen Jan 2021

Intense Monochromatic Photons Above 100 Kev From An Inverse Compton Source, Kirsten Deitrick, Georg H. Hoffstaetter, Carl Franck, Bruno D. Muratori, Peter H. Williams, Geoffrey A, Krafft, Balša Terzić, Joe Crone, Hywel Owen

Physics Faculty Publications

Quasimonochromatic x rays are difficult to produce above 100 keV, but have a number of uses in x-ray and nuclear science, particularly in the analysis of transuranic species. Inverse Compton scattering (ICS) is capable of fulfilling this need, producing photon beams with properties and energies well beyond the limits of typical synchrotron radiation facilities. We present the design and predicted output of such an ICS source at CBETA, a multiturn energy-recovery linac with a top energy of 150 MeV, which we anticipate producing x rays with energies above 400 keV and a collimated flux greater than 108 photons per second …

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