Digital Commons Network^™

Graph Regularized Sparse L2,1 Semi-Nonnegative Matrix Factorization For Data Reduction, Anthony Rhodes, Bin Jiang, Jenny Jiang

Mathematics and Statistics Faculty Publications and Presentations

Non-negative Matrix Factorization (NMF) is an effective algorithm for multivariate data analysis, including applications to feature selection, pattern recognition, and computer vision. Its variant, Semi-Nonnegative Matrix Factorization (SNF), extends the ability of NMF to render parts-based data representations to include mixed-sign data. Graph Regularized SNF builds upon this paradigm by adding a graph regularization term to preserve the local geometrical structure of the data space. Despite their successes, SNF-related algorithms to date still suffer from instability caused by the Frobenius norm due to the effects of outliers and noise. In this paper, we present a new L2,1 SNF algorithm that …

Working Memory Gating In Obesity Is Moderated By Striatal Dopaminergic Gene Variants, Nadine Herzog, Hendrik Hartmann, Lieneke Katharina Janssen, Arsene Kanyamibwa, Maria Waltmann, Peter Kovacs, Lorenz Deserno, Sean Fallon, Arno Villringer, Annette Horstmann

School of Psychology

Everyday life requires an adaptive balance between distraction-resistant maintenance of information and the flexibility to update this information when needed. These opposing mechanisms are proposed to be balanced through a working memory gating mechanism. Prior research indicates that obesity may elevate the risk of working memory deficits, yet the underlying mechanisms remain elusive. Dopaminergic alterations have emerged as a potential mediator. However, current models suggest these alterations should only shift the balance in working memory tasks, not produce overall deficits. The empirical support for this notion is currently lacking, however. To address this gap, we pooled data from three studies …

Evaluating A Virtual Facilitation Workshop With Antimicrobial Stewardship Teams Within A Cluster Randomized Stepped-Wedge Trial, Sara Malone, Kelly Bono, Jacqueline M Saito, Shawn Rangel, Jingxia Liu, Jason G Newland, Virginia Mckay

2020-Current year OA Pubs

BACKGROUND: Antimicrobial stewardship programs (ASP) often function naturally as facilitators within clinical hospital settings, by working with individuals and teams to reduce unnecessary antibiotics. Within implementation science, facilitation has been studied and evaluated as an implementation strategy that can accelerate and improve fidelity to implementation efforts. This study describes a novel, virtual facilitation strategy developed and served as an intervention within the optimizing perioperative antibiotics for children trial (OPERATIC trial). This paper: (1) describes ASP team's preferences for and use of a facilitation workshop and (2) describes sustained use of facilitation skills throughout the study period.

METHODS: Study participants included …

Carotid Artery Stenting For Symptomatic Carotid Near Occlusions: Feasibility, Safety And Outcome Analysis, Guilherme Dabus

All Publications

Introduction: Extracranial internal carotid stenosis (EICS) is a well-established cause of stroke. Carotid near-occlusion (CNO), either distally collapsed or not, is a rare sub-type of EICS with conflicting data regarding the necessity for treatment. The aim of this study is to evaluate the results of carotid artery stenting (CAS) for patients with symptomatic CNOs.

Material and methods: Institutional review board (I06-420-23) approval was obtained for this retrospective study. Consecutive data from January 2019 to January 2023 was obtained. Sixty-five patients underwent 66 procedures for symptomatic CNOs. Diagnosis of CNOs were made with DSA images. Treatment decisions were made by a …

Glenn Howard Griffin, Petitioner/ Appellant V. State Of Utah, Respondent/ Appellee : Brief Of Appellee, Utah Court Of Appeals

Utah Court of Appeals Briefs (2020 –)

Appeal from an order granting summary judgment and denying a petition for postconviction relief, Case No. 170100200, in the First Judicial District Court, Box Elder County, the Honorable Spencer Walsh presiding.

DAVID FERGUSON, Counsel for Appellant

ERIN RILEY, SEAN D. REYES, Counsel for Appellee

Psychological And Social Well-Being Of Bony Fishes In Zoos And Aquariums (Ii), Ronald G. Oldfield

Faculty Scholarship

Research on the behaviour of animals in zoos has been conducted for decades, and observations have provided information that has improved the psychological and social well-being of animals. However, research on fishes in zoos and aquariums seems to be lacking. Here, we assess the current state of research on fishes in zoos and aquariums by surveying the peer-reviewed literature. Our assessment differs from previous surveys in that we examine the taxonomic classes Chondrichthyes (sharks and rays) and Osteichthyes (bony fishes) separately. Our survey finds that bony fishes have been drastically underrepresented in zoo journals, more drastically than chondrichthyans, revealing an …

A Home Dyer's Garden, Part I: Growing Japanese Indigo, Wesley Crump, Toree Park, Elizabeth Cohen

All Current Publications

Japanese indigo is an annual plant with numerous varieties. Most varieties thrive in the temperate environments found in much of Utah but may exhibit stress in intense heat. This is the first of three fact sheets in the A Home Dyer's Garden series on dyeing with Japanese indigo. It covers how to grow Japanese indigo. Soil preparation, planting and spacing, water, fertilizer, insects and diseases, and harvesting are discussed.

Parrotfeather (Myriophyllum Aquaticum) Identification And Management In Waterways, Jacob Hadfield, Cody Zesiger, Michael Pace, Mirella Ortiz, Corey Ransom

All Current Publications

Parrotfeather (Myriophyllum aquaticum) is an invasive aquatic plant species that grows in ditches, ponds, lakes, and other freshwater habitats. Due to its aggressive nature, parrotfeather will often take over freshwater settings by creating a thick mat covering that prevents sunlight for native aquatic organisms and inhibits regular water flow. This fact sheet discusses identification and management options.

The Black And African American Connections To Parkinson's Disease (Blaac Pd) Study Protocol, Lana M Chahine, Scott A Norris, Et Al.

2020-Current year OA Pubs

Determining the genetic contributions to Parkinson's disease (PD) across diverse ancestries is a high priority as this work can guide therapeutic development in a global setting. The genetics of PD spans the etiological risk spectrum, from rare, highly deleterious variants linked to monogenic forms with Mendelian patterns of inheritance, to common variation involved in sporadic disease. A major limitation in PD genomics research is lack of racial and ethnic diversity. Enrollment disparities have detrimental consequences on the generalizability of results and exacerbate existing inequities in care. The Black and African American Connections to Parkinson's Disease (BLAAC PD) study is part …

Factors Associated With Dementia-Related Stigma In British Adolescents, Esra Hassan, Ben Hicks, Naji Tabet, Nicolas Farina

Peninsula Medical School

Background: Dementia-related stigma is a prominent barrier for people living with dementia, leading to poor well-being and social isolation. Adolescents are an under-researched group in society that may already have experience of dementia and are more susceptible to attitudinal change which makes them ideal targets for anti-stigma initiatives outlined by public health policy. For the development of evidence-based anti-stigma initiatives in adolescents, it is important to understand which socio-demographic groups are most likely to develop stigmatising attitudes and why. This study aims to identify factors of dementia-related stigma in adolescents. Methods: A total of 1,044 adolescents (aged 11–18 years) from …

Co-Creation Of Social Innovations For Healthy Ageing In Rural Europe–A Process Evaluation Of A Volunteer-Led Guided Conversation Toolkit Using Normalisation Process Theory (Npt), Mahrukh Mirza, Basharat Hussain, Shukru Esmene, Catherine Leyshon, Michael Leyshon, Arunangsu Chatterjee

Peninsula Medical School

We critically explored the use of Normalisation Process Theory (NPT) in the evaluation of a co-designed intervention toolkit for Healthy Ageing through Innovation in Rural Europe (HAIRE). The toolkit was co-designed and implemented in rural communities in Belgium, France, the Netherlands and the United Kingdom. NPT was applied as a novel analytical framework to shed light on key practices and processes that supported implementation. Further, the paper discusses how social innovation research helps frame co-designing such interventions with local communities. During the study, 25 semi-structured interviews were conducted with project partners and volunteers who were involved in toolkit co-design and …

Anthropology & Aging From The Editor-In-Chief, Manonita Ghosh

Research outputs 2022 to 2026

No abstract provided.

Manifestations Of Sulfuric Acid Speleogenesis In The Mulapampa Travertine, Central Andes Of Peru: Evidence From The Gruta Con Lago, Andrzej Tyc, Krzysztof Gaidzik, Justyna Ciesielczuk, Katarzyna Wątor

International Journal of Speleology

Sulfuric acid speleogenesis (SAS) is a form of hypogene speleogenesis characterized by the formation of caves in carbonate rocks due to the presence of sulfuric acid. This study focuses on the Gruta con Lago, one of three caves identified in the Mulapampa travertine, located in the central Andes of Peru. These caves are accessed through collapse sinkholes, and much of their morphology results from roof breakdown. The bottom of the studied cave is situated at the current water table. Despite the absence of typical solutional features associated with SAS caves, mineralogical and geochemical evidence of speleogenesis involving H₂SO …

Note From Editor, Steven M. Schnell

The Geographical Bulletin

Note from Editor

Cover And Forewords, Steven M. Schnell

The Geographical Bulletin

Cover and Forewords

Geography And The Art Of Life, Edmunds Valdemars Bunkse Reviewed By Dawn M . Drake., Edmunds Valdemars Bunkse

The Geographical Bulletin

Reviewed by Dawn M. Drake, Department of Geography, University of Tennessee, Knoxville, TN 37996. E-mail: [email protected]

Volume 48-2 Complete Issue, Steven M. Schnell

The Geographical Bulletin

Volume 48-2 Complete Issue

A Re-Examination Of The Lost Lake Effect In Buffalo, New York, Stephen Vermette, Emmanuel Orengo

The Geographical Bulletin

In 1943, the National Weather Service moved the weather station at Buffalo, New York from its downtown waterfront location to an inland location. Recently discovered air temperature data from the log books of the Colonel Ward Pumping Station (1943 to 1987) allow for a comparison of monthly temperatures with those of Buffalo’s current inland weather station. Our objective is to determine if the lake effect was lost in the climatic record with the inland move of the weather station. Differences in average monthly temperatures between the waterfront and inland locations support the loss of the lake effect. If the weather …

Where Are The Geographers? Newly Incorporated Municipalities (Nims) In The South, Russel M. Smith, Keith Debbage

The Geographical Bulletin

The creation of new cities can have dramatic impacts on urban landscapes regarding tax rates, land use patterns, school districts, and the provision of other municipal services. Between 1990 and 2005, 193 newly incorporated municipalities (NIMs) were created in the South. The study of these new cities falls under the purview of the larger field of boundary change. Boundary change can take the form of annexation, consolidation/ merger, secession, the formation of special districts, and incorporation. This paper examines the current literature on the different forms of boundary change and provides potential explanations for why municipal incorporation is an area …

Application And Comparison Of Geomorphological And Hydrological Pool And Riffle Quantification Methods, Amy M. Krueger, Kelly M. Frothingham

The Geographical Bulletin

Pools and riffles have long been recognized as fundamental geomorphological elements of meandering streams. As such, the quantification of pool and riffle characteristics and development of techniques to identify these bed forms has been an important research field for decades. The definition and identification of pools and riffles, however, can vary amongst disciplines. This research compares methods used in two different disciplines, geomorphology and hydrology, and determines the level of agreement between them. Initially, we identified pools and riffles using the bed differencing technique (bdt) in fifteen reaches of Ransom Creek, Clarence, New York. We then calculated the hydrological index, …

An All-Hazards Approach To Us Military Base Camp Site Selection, Mark Corson, Christopher Jasperro

The Geographical Bulletin

Throughout history, military forces have built encampments and bases in hostile areas to defend and sustain themselves while on campaign. The predominant criteria for site selection were and continue to be tactical and logistical concerns. This article applies a geographic perspective to US military base camp site selection in contingency operations such as Bosnia, Kosovo, Iraq, or Afghanistan. In particular, it argues that an all-hazards approach should be employed in the site selection process, and that the all-hazards approach be an integral part of the planning phase of base camp development and emerging site selection doctrine. This project begins with …

The Effects Of Pacific Oscillations On Snowpack In The Rattlesnake Creek Drainage, Western Montana, Deana Dewire

The Geographical Bulletin

Snow is an important water resource for communities throughout the western United States. In western Montana, 62% of annual precipitation falls as snow. Recent research suggests there is an inverse relationship between Northern Rockies snowpack and El Niño and between Northern Rockies snowpack and the positive phase of the Pacific Decadal Oscillation, a realization that could benefit the communities and industries throughout the West that depend on snowmelt for their water needs. This research uses linear regression statistics to test if a correlation exists between ENSO or PDO and April 1 snowpack at the headwaters of the Rattlesnake Creek in …

Safety First: Unpacking Key Roles Of Arctic Adventure Guides, Barbara Olga Hild, Betty Weiler Professor

International Journal of Tour Guiding and Visitor Attraction Research

Building on past research on tour guides and guiding, this paper provides an in-depth examination of the safety management role of tour guides leading adventure trips. A review of previous literature identifies broad dimensions of tour guiding and, within these dimensions, specific guiding roles mainly in relation to communication. The current study’s qualitative examination of experienced Arctic guides, however, illustrates how environmental conditions contribute to near misses and points to safety management as an adventure guide’s fundamental role. The findings highlight the need for guide competence and certification and underpin recommendations for research in relation to guide education and practices …

Note From Editor, Steven M. Schnell

The Geographical Bulletin

Note from Editor

Cover And Forewords, Steven M. Schnell

The Geographical Bulletin

Cover and Forewords

Volume 48-1 Complete Issue, Steven M. Schnell

The Geographical Bulletin

Volume 48-1 Complete Issue

Reel Racing: The Geography Of The United States Lawn Mower Racing Association, H. Jason Combs

The Geographical Bulletin

The United States Lawn Mower Racing Association (USLMRA) formed on April Fools’ Day 1992 and now has approximately 500 members and a national racing circuit. This paper examines the geography of the USLMRA as well as the reasons for its expansion. Professional lawn mower racing’s popularity is somewhat in response to NASCAR’s commercialization and nationalization efforts. Lawn mower racing is more affordable than stock car racing and provides an outlet for many adrenaline-enriched and mechanically inclined individuals. The national circuit runs through traditional stock car country—from Texas and Florida to Illinois, Wisconsin, and Ohio. The majority of USLMRA members and …

Interviewed By Steven Schnell. Editor, The Geographical Bulletin, Minelle Mahtani

The Geographical Bulletin

Minelle Mahtani is currently an Assistant Professor of Geography at the University of Toronto. She holds a B.A. from Dalhousie University in anthropology, a Ph.D. in geography from University College London, and a postdoctoral position at the University of British Columbia. She has also had stints as a television producer for the Canadian Broadcasting Corporation, and working for a nonprofit organization, the Institute for Media, Policy, and Civil Society. Her research interests include critical mixed race theory; feminist geography, women of color in geography, media and minority representation, and geographies of media.

Ecological Marginalization And Hill Tribe Security In Northern Thailand, Richard A. Crooker

The Geographical Bulletin

In recent decades, Thai elites have ecologically marginalized hill tribe farmers in northern Thailand. A region-wide population boom has fueled a ‘land grab’ by the elites and forced hill tribe farmers to live on less land with few off-farm options. The marginalized farmers are less secure in their livelihoods, and as a result, there has been conflict over resources between them and governmental authorities and ethnic Thais. This paper analyzes the hill tribes’ marginalization in order to assess the risk of heightened social conflict in the region. I chose hill tribe villages in the Mae Sa Valley as a “best-case” …

Environment And Security Conflicts: The U.S. Military In Okinawa, Jonathan Taylor

The Geographical Bulletin

This paper explores the effects of ongoing environmental issues related to U.S. military bases in Okinawa. Okinawa’s history, particularly the damage it suffered during World War II has led to an active anti-military movement on the island. The U.S. bases exist in a context of anti-military and environmental movements which seek to dislodge the bases from their current location. At the same time the U.S. military bases have had both direct and indirect effects upon Okinawa’s environment: some positive, though many negative. Some steps the U.S. military could take to lessen its environmental impacts upon Okinawa are suggested.