Digital Commons Network^™

A Conceptual Model To Explain Dark Matter And Dark Energy, Jonathan Blackledge

Articles

t This paper considers a conceptual model that attempts to explain ‘Dark Matter’ and ‘Dark Energy’. The model is based on considering a gravitational field to be the result of a mass (a Higgs field) scattering pre-existing cosmic background space-time waves or ‘Uber-waves’. The term ‘Uber’ is used to denote an outstanding or supreme example of a particular kind of gravitational wave with cosmic-scale wavelengths that are far in excess of those associated with the gravitational waves generated by accelerating masses. Such waves are taken to be the very lowest frequency components associated with the spectrum of space-time waves generated …

Reformulating The Binary Masking Approach Of Adress As Soft Masking, Ruairí De Fréin

Articles

Binary masking forms the basis for a number of source separation approaches that havebeen successfully applied to the problem of de-mixing music sources from a stereo recording.A well-known problem with binary masking is that, when music sources overlap in the time-frequencydomain, only one of the overlapping sources can be assigned the energy in a particulartime-frequency bin. To overcome this problem, we reformulate the classical pan-pot source separationproblem for music sources as a non-negative quadratic program. This reformulation gives rise toan algorithm, called Redress, which extends the popular Adress algorithm. It works by definingan azimuth trajectory for each source based on …

A Wide Frequency Scanning Printed Bruce Array Antenna With Bowtie And Semi-Circular Elements, Zeeshan Ahmed, Patrick Mcevoy, Max Ammann

Articles

A printed edge-fed counterpart of the wire Bruce array antenna, for frequency scanning applications, is presented in this paper. The unit-cell of the proposed antenna consists of bowtie and semi-circular elements to achieve wide bandwidth from below 22 GHz to above 38 GHz with open-stopband suppression. The open-stopband suppression enables a wide seamless scanning range from backward, through broadside, to forward endfire. A sidelobe threshold level of −10 dB is maintained to evaluate efficient scanning performance of the antenna. The antenna peak realized gain is 15.30 dBi, and, due to its compact size, has the ability to scan from −64° …

Spectral Dependence Of Transmission Losses In High-Index Polymer Coated No-Core Fibers, Xiaokang Lian, Gerald Farrell, Qiang Wu, Wei Han, Changyu Shen, Youqiao Ma, Yuliya Semenova

Articles

A high-index polymer coated no-core fiber (PC-NCF) is effectively a depressed core fiber, where the light is guided by the anti-resonant, inhibited coupling and total internal reflection effects and the dispersion diagram shows periodic resonant and anti-resonant bands. In this paper, the transmission spectra of the straight and bent PC-NCFs (length > 5 cm) are measured and analyzed from a modal dispersion perspective. For the purpose of the study, the PC-NCFs are contained within a fiber hetero-structure using two single-mode fiber (SMF) pigtails forming a SMF-PC-NCF-SMF structure. The anti-resonance spectral characteristics are suppressed by the multimode interference in the PC-NCF with …

The Effect Of High Background And Dead Time Of An Ingaas/Inp Single-Photon Avalanche Photodiode On The Registration Of Microsecond Range Near-Infrared Luminescence, P. S. Parfenov, A. P. Litvin, D. A. Onishchuk, K. A. Gonchar, Kevin Berwick, A. V. Fedorov, A. V. Baranov

Articles

The effects of a high background count and a microsecond dead time interval on a gated InGaAs/InP single-photon avalanche photodiode (SPAD) during microsecond luminescence decay registration are discussed. It is shown that the background count rate of the SPAD limits its use for time-resolved and steady-spectral measurements, and that a “pile-up” effect appears in the microsecond range.

Carbon-Based Interlayers In Perovskite Solar Cells, Aleksandr P. Litvin, Xiaoyu Zhang, Kevin Berwick, Anatoly V. Fedorov, Weitao Zheng, Alexander V. Baranov

Articles

Perovskites are solution-processed, high-performance semiconductors of interest in low-cost photovoltaics. The interfaces between the perovskite photoactive layers and the top and bottom contacts are crucial for efficient charge transport and minimizing trapping. Control of the collection of charge carriers at these interfaces is decisive to device performance. Here, we review recent progress in the realization of efficient perovskite solar cells using cheap, easily processed, stable, carbon-based interlayers. Interface materials including graphene, carbon nanotubes, fullerenes, graphene quantum dots and carbon dots are introduced and their influence on device performance is discussed.

Application Of Demand Response To Improve Voltage Regulation With High Dg Penetration, Chittesh Veni Chandran, Malabika Basu, Keith Sunderland, Shivananda Pukhrem, João Catalão

Articles

The ability of a consumer friendly demand response based voltage control (DR-VC) program to improve the voltage regulation in a low voltage distribution network (LVDN) with high penetration of DG is investigated. The use of active and reactive power management to regulate the nodal voltage in a distribution network with simple incremental reduction algorithm, in conjunction with DR, is proposed as a solution for over voltage and undervoltage issues in the LVDN. The algorithm micromanages the load and generation in the network enabling the operator to utilize grid resources economically and efficiently while maintaining fairness between consumers with minimum inconvenience. …

The Missing Parameter In Renewable Energy Power Quality Analysis, I.E. The Coefficient Of Variation: Case Study Of A 3-Mw On-Site Wind Turbine Project In Ireland, Tony Kealy

Articles

Businesses are employing distributed generation techniques, such as wind turbines, to decarbonise their electrical energy supply by reducing their dependence on fossil-fuel-generated energy. This study investigates the effectiveness of a company making a €3,500,000 investment in a 3-MW on-site wind turbine to supply some or all of their factory electrical loads. The results should benefit the investing company and other potential investors by evaluating the economic, environmental, and social outcomes of the investment. A case study methodology was used. The study found that the payback period was six and a half years, and the turbine installation benefited the environment by …

Maternal Mortality Among African American Women In The State Of Georgia, Causes, Policy, And Ethical Considerations, Zahra Shahin, Isabella M. Hardwick, Nancy Jeffery, Jalisa Jordan, William Mase

Health Policy & Community Health: Faculty Publications

Background

The U.S. is currently one of thirteen countries where maternal mortality rates (MMR) is worse now than it was fifteen years ago. Reducing maternal mortality is one of the significant challenges facing the health system in the United States, especially in the State of Georgia, which has one of the highest MMR in the nation. The purpose of this review is to explore the causes, policy, and ethical contextual factors contributing to increased maternal mortality rates among African American women in the State of Georgia. Also, identifying and addressing weaknesses and gaps that exist in the healthcare system and …

A Mixed Public-Private Partnership Approach For Cyber Resilience Of Space Technologies, Bilge Karabacak, Gokhan Ikitemur, Andy Igonor

All Faculty and Staff Scholarship

Governments today emphasize space systems as critical infrastructures. Many vital services, including communications, transportation, and maritime operations, depend on space systems. Cyber systems represent an essential component that enables effective functioning, configuration, and monitoring of technological space services. Space systems possess unique vulnerabilities and properties that attract the attention of hackers, and often with varying motivations. The private sector increasingly participates in the production of space technologies, and as a result of the differences in perceptions and priorities of governments and the private sector, handling the challenges of governance as it relates to the cybersecurity of space systems presents an …

Instructional Design Leadership And Management Competencies: Job Description Analysis, Joel Gardner, Lewis Chongwony, Amie Tope

All Faculty and Staff Scholarship

Researchers in the field of instructional design and educational technology journals usually focus on the practice of instructional design; however, the management and leadership of instructional design has typically received little emphasis. Recent studies have investigated the competencies associated with effective leadership and management of instructional design from the perspective of those they lead, and from the perspective of leaders in higher education. There is, however, little systematic research into what competencies employers require of leaders and managers of instructional designers in higher education. This research would provide the field with further guidance on training and preparing instructional design leaders …

Nebraska Annual Social Indicators Survey (Nasis) 2020 Winter Methodology Report, Bureau Of Sociological Research

Nebraska Annual Social Indicators Survey (NASIS)

No abstract provided.

In Vivo Activity Of Copper(Ii), Manganese(Ii), And Silver(I) 1,10-Phenanthroline Chelates, Rafael M. Ghandra, Pauraic Mccarron, Livia Viganor, Mariana Farias Fernandes, Kevin Kavanagh, Malachy Mccann, Marta H. Branquinha, André L.S. Santos, Orla L. Howe, Michael Devereux

Articles

Candida haemulonii is an emerging opportunistic pathogen resistant to most antifungal drugs currently used in clinical arena. Metal complexes containing 1,10-phenanthroline (phen) chelating ligands have well-established anti-Candida activity against different medically relevant species. This study utilized larvae of Galleria mellonella, a widely used model of in vivo infection, to examine C. haemulonii infection characteristics in response to different copper(II), manganese(II), and silver(I) chelates containing phen, which had demonstrated potent anti-C. haemulonii activity in a previous study. The results showed that C. haemulonii virulence was influenced by inoculum size and incubation temperature, and the host G. mellonella immune …

Breastfeeding Practices 2008–2009 Among Chinese Mothers Living In Ireland: A Mixed Methods Study, Qianling Zhou, Katherine Younger, Tanya M. Cassidey, Wenyi Wang, John Kearney

Articles

Background

Migration to another country has a potential influence on breastfeeding practices. A significant difference in breastfeeding rates between Irish nationals and non-nationals has been reported. This study was conducted to explore breastfeeding practices of the Chinese in Ireland, one of the largest Irish ethnic groups, and to explore the influence of living in Ireland on breastfeeding practices. This is the first and the only migration study so far on breastfeeding practices among the Chinese in Ireland.

Methods

A sequential explanatory mixed methods approach was adopted. The first phase was a cross-sectional self-administered retrospective mailed survey, to explore breastfeeding practices …

The Prevalence Of Overweight And Obesity In Irish Children Between 1990 And 2019, Aisling O'Donnell, Maria Buffini, Laura Kehoe, Ann Nugent, John Kearney, Janette Walton, Albert Flynn, Breige Mcnulty

Articles

Objective: The present study aimed to examine the temporal prevalence of overweight and obesity in Irish children through different methodologies and evaluate the change in rates between 1990 and 2019.

Cost-Effectiveness Of A Mobile Health-Supported Lifestyle Intervention For Pregnant Women With An Elevated Body Mass Index, Elizabeth O'Sullivan, Salwa Rokicki, Maria Kennelly, Kate Ainscough, Fionnuala M. Mcauliffe

Articles

Objective To assess the cost-effectiveness of a mobile health-supported lifestyle intervention compared with usual care.

Methods We conducted a cost-effectiveness analysis from the perspective of the publicly-funded health care system. We estimated costs associated with the intervention and health care utilisation from first antenatal care appointment through delivery. We used bootstrap methods to quantify the uncertainty around cost‐effectiveness estimates. Health outcomes assessed in this analysis were gestational weight gain (GWG; kg), incidence of excessive GWG, quality-adjusted life years (QALYs), and incidence of large-for-gestational-age (LGA). Incremental cost-effectiveness ratios (ICERs) were calculated as cost per QALY gained, cost per kg of GWG …

Beyond The Belloni Decision: Sohappy V. Smith And The Modern Era Of Tribal Treaty Rights, Monte Mills

Articles

Indian tribes and their members are leading a revived political, legal, and social movement to protect the nation’s natural resources. In doing so, tribes and their allies employ many effective strategies but core to the movement are the historic promises made to tribes by the United States through treaties. Tribes are asserting treaty-protected rights, which the United States Constitution upholds as the supreme law of the land, to defend the resources on which they and their ancestors have relied for generations. Those claims have resulted in significant legal victories, igniting a broader movement in favor of tribal sovereignty and securing …

Resolving Tensions Between Disability Rights Law And Covid-19 Mask Policies, Elizabeth Pendo, Robert Gatter, Seema Mohapatra

Articles

As states reopen, an increasing number of state and local officials are requiring people to wear face masks while out of the home. Grocery stores, retail outlets, restaurants, and other businesses are also announcing their own mask policies, which may differ from public policies. Public health measures to stop the spread of the coronavirus such as wearing masks have the potential to greatly benefit millions of Americans with disabilities, who are particularly vulnerable to the impact of COVID-19. But certain disabilities may make it difficult or inadvisable to wear a mask.

Mask-wearing has become a political flashpoint, putting people with …

The Politics Of Caregiving: Taking Stock Of State-Level Policies To Support Family Caregivers, Walter D. Dawson, Lauren Bangerter, Micheal Splaine

Institute on Aging Publications

The U.S. population is aging rapidly. The changing demographics offer several benefits and opportunities at local, national, and global levels (Kluge, Zagheni, Loichinger, & Vogt, 2014). Yet, living to an advanced age remains a significant risk factor for the need of care and support during one’s lifetime. Half of all adults 65 years of age and older will reach a point where they require a high level of support due to either physical or cognitive challenges (Tumlinson, Juring, & Alkema, 2016). At the same time, the number of older adults living with chronic disease (e.g., diabetes, …

University Of Richmond Magazine, Winter 2020

University of Richmond Magazine

The University of Richmond's Alumni Magazine was first published as The Alumni Bulletin in 1936 and continues to this day as the University of Richmond Magazine.

Too Busy To Be Manipulated: How Multitasking With Technology Improves Deception Detection In Collaborative Teamwork, Nathan W. Twyman, Jeffrey G. Proudfoot, Ann-Frances Cameron, Eric Case, Judee K. Burgoon, Douglas P. Twitchell

Faculty Publications

Deception is an unfortunate staple in group work. Guarding against team members’ deceptive tactics and alternative agendas is difficult and may seem even more difficult in technology-driven business environments that have made multitasking during teamwork increasingly commonplace. This research develops a foundation for a nuanced theoretical understanding of deception detection under these conditions. The intersection of information technology multitasking and deception detection theories is shown to produce various and sometimes competing ideas about how this type of multitasking might affect truthfulness assessments in real-time teamwork. A laboratory study involving a collaborative game helped evaluate the different ideas using manipulated deception …

Successful Moderation In Online Patient Communities: Inductive Case Study, Tanner Skousen, Hani Safadi, Colleen Young, Elena Karahanna, Sami Safadi, Fouad Chebib

Faculty Publications

Background: Online patient communities are becoming more prevalent as a resource to help patients take control of their health. However, online patient communities experience challenges that require active moderation.

Objective: This study aimed to identify the challenges of sustaining a thriving online patient community and the moderation practices employed to address the challenges and manage the online patient community successfully.

Methods: An inductive case study of Mayo Clinic Connect was analyzed using the grounded theory methodology. Insights for the analysis were obtained from semistructured interviews with community managers and community members. Secondary data sources, such as community management documents, observational …

Team Design Thinking, Product Innovativeness, And The Moderating Role Of Problem Unfamiliarity, Varun Nagaraj, Nicholas Berente, Kalle Lyytinen, James Gaskin

Faculty Publications

Team design thinking in new product development (NPD) refers to a set of design-oriented principles that can be embedded in the everyday routines of NPD teams. We theorize that team design thinking enables NPD teams to develop more innovative products––products that are useful and novel––by reducing the routine and cognition-based inertia that constrains the team’s innovativeness. Through a study of 247 NPD projects, we investigate the relationships between team design thinking, product utility, and product novelty. Further, we also explore whether the team’s unfamiliarity with product contexts influences these relationships. Findings show that team design thinking is positively associated with …

Table Of Contents

Georgia Law Review

No abstract provided.

Injunction Junction, What’S Your Function? Crafting Permanent Injunctions To Be Appropriate Remedies In Defamation Cases, James Netter

Georgia Law Review

When someone is liable for defamation, a court will
almost always levy monetary penalties against the
defamer. A rarely used penalty for defamation is the
imposition of a permanent injunction on the defaming
party that would prevent them from repeating their
defamatory content. Many courts see permanent
injunctions as an unconstitutional prior restraint on a
person’s right to speak, refusing to allow the
condemnation of a person’s speech before they have
spoken it. However, the common justifications for
denying permanent injunctions are weaker upon
reevaluation, particularly in the Internet age, and some
courts and legal scholars recognize that an injunction …

State Of The Unions: The Impact Of Janus On Public University Student Fees, Jonathan Kaufman

Georgia Law Review

In Janus v. American Federation of State, County,
and Municipal Employees, Council 31, the U.S.
Supreme Court overruled forty-one years of precedent
that had allowed public-sector unions to collect
agency-shop fees from nonmembers. The Court ruled this
mandatory fee collection unconstitutional as a violation
of nonmember First Amendment rights. This decision
may pose problems for other public entities, such as
public universities, who also collect mandatory fees that
support political speech.

Table Of Contents

Georgia Law Review

No abstract provided.

Juvenile Justice Reform In Georgia: A Collective Decisionmaking Approach To De-Politicize Crime And Punishment, The Honorable Steven Teske

Georgia Law Review

Since the creation of the first juvenile court in 1899, juvenile courts have undergone periods of transition in response to legislative enactments prompted by societal events or in response to legal challenges involving due process rights of children. This Article examines politics and the extent in which it played a role in shaping juvenile justice and crime policies and its impact on children and public safety. In this critical review of each period of transition, this Article concludes that the lack of success among juvenile justice agencies, including the courts, is predominately the result of the politicizing of crime and …

To Outgrow A Mockingbird: Confronting Our History—As Well As Our Fictions—About Indigent Defense In The Deep South, Sarah Gerwig-Moore

Georgia Law Review

To Kill a Mockingbird occupies a beloved space in law school classrooms and curricula, especially in its portrayal of Atticus Finch. Frequently held up as the model or “hero-lawyer,” Atticus’s character is powerful in fiction, but problematic in practice. His work is lauded, rather than scrutinized, despite his questionable ability to represent his client in life-or-death circumstances—specifically, a racially charged sexual assault case in the Deep South. Through considering examples of historical lawyers and texts which explore similar themes without the lens of fiction, those engaged in legal education and legal practice can and should look to others to study …

Resource Selection And Calving Success Of Moose In Colorado, Forest P. Hayes

Graduate Student Theses, Dissertations, & Professional Papers

Across much of North America, moose populations (Alces alces) are declining due to disease, predation, climate, and anthropogenic pressures. Despite this, populations of moose in Colorado have continued to grow. Studying successful (i.e., persistent or growing) populations of moose can facilitate the continued conservation of the species by identifying habitat features critical for moose persistence.

First, I evaluated calving success of moose in Colorado and the impact of willow habitat quality and nutrition. I then estimated the probability of female moose having a calf using repeated observations in a Bayesian occupancy model. I assigned values for dry matter …