Digital Commons Network^™

The Relationship Between First Case On-Time Starts, Turnover Times, And Operating Room Productivity, Rhafia Bucoy

Walden Dissertations and Doctoral Studies

Operating room (OR) managers struggle to manage day-to-day surgical operations while meeting and exceeding organizational productivity amid the COVID-19 pandemic. The deferral of surgeries contributes to millions of backlogs of surgical case volume and unintended negative consequences. Grounded in the proposition that first-case on-time starts (FCOTS) and turnover time (TOT) are correlates of OR productivity, the purpose of this quantitative correlational study was to examine the relationship between FCOTS, TOT, and OR productivity. Archival data from 136 electronic surgical records were collected from two free-standing ambulatory surgery centers and analyzed using multiple regression. The results of the one-service, eye-specialized, ambulatory …

Campus Administrators’ Perceptions Of Their Influence On The Success Of Instructional Coaching Programs In Urban Elementary Schools, Sakinah S. Burroughs

Walden Dissertations and Doctoral Studies

Walden University

College of Education and Human Sciences

This is to certify that the doctoral study by

Sakinah S. Burroughs

has been found to be complete and satisfactory in all respects, and that any and all revisions required by the review committee have been made.

Review Committee Dr. Robert Flanders, Committee Chairperson, Education Faculty Dr. Kenneth McGrew, Committee Member, Education Faculty Dr. Cleveland Hayes, University Reviewer, Education Faculty

Chief Academic Officer and Provost Sue Subocz, Ph.D.

Walden University2022

Adoption Of It Governance Strategies For Multiproduct Devops Teams: A Correlational Quantitative Study, Russell Camilleri

Walden Dissertations and Doctoral Studies

Many multiproduct delivery organizations have difficulty adopting Information Technology (IT) governance practices within their Development and Operations (DevOps) teams. IT leaders who are managing DevOps teams, need to understand the factors influencing IT governance (ITG) adoption; otherwise this may impact DevOps maturity, resulting in reduced product delivery capabilities. Grounded in the technology acceptance model, the purpose of this quantitative correlational study was to examine the relationship between performance expectancy (PE), effort expectancy (EE), social influence (SI), and facilitating conditions (FC), as moderated by experience (EXP), gender (GND), age (AGE), and voluntariness of use (VOL) with behavioral intention (BI) to adopt …

An Exploration Of The Longevity Of High School Principals Tenure In California, Steven David Caminiti

Walden Dissertations and Doctoral Studies

Research has focused on the various reasons why high school principals leave their positions, yet minimal research has been done on the reasons why they stay. The problem of inconsistency of high school principals’ tenure within the first 4 years of service was addressed in this study. Deci and Ryan’s self-determination theory was used in this exploratory case study to explore the perspectives of eight high school principals in one region of California who continued to serve for 4 years or more through a strengths-based approach to the problem. Research questions were focused on the motivators that high school principals …

Infrastructure As Code Strategies And Benefits In Cloud Computing, Jeffrey Chijioke-Uche

Walden Dissertations and Doctoral Studies

Hybrid and multicloud infrastructure implementation without automation and versioning strategy can negatively impact organizations’ productivity. Organization leaders must ensure that infrastructures are implemented using the infrastructure as code (IaC) strategy because implementation solutions, including automated and DevOps procedures, provide assets for repeatable infrastructure implementation use cases. Grounded in the disruptive innovation theory, the purpose of this qualitative pragmatic inquiry study was to explore strategies solution architects use to implement IaC architecture using repeatable assets with DevOps procedures in cloud computing. The participants were seven solution architects in the information technology (IT) industry within the United States who have successfully implemented …

Principals’ Leadership Role In Supporting Culturally Responsive English Language Learner Programs, Lawrence Cowger

Walden Dissertations and Doctoral Studies

English language learners face different challenges in accessing relevant curriculum content compared to native English speakers. There is limited research on effective strategies that teachers use to ensure learning outcomes among English language learners. The purpose of this case study was to explore the leadership strategies that principals implement to support teachers’ culturally responsive strategies when working with English language learning (ELL) students. Culturally responsive school leadership (CRSL) was the basis of the conceptual framework, using research from Walker and five CRSL concepts. The research questions focused on school leadership and how administrators support teachers of ELL programs using CRSL. …

Cluster Analysis Of Psychopathology, Drug Use, Drug And Alcohol Issues, Psychosocial Stressors, And Personal Demographics Of Adult Female Sex Offenders, Anne Cyr-Ashworth

Walden Dissertations and Doctoral Studies

The purpose of this quantitative study was to examine the number and nature of clusters that emerged as common individual patterns across a set of psychopathology, drug use, drug and alcohol issues, psychosocial stressors, and personal demographics among adult female sexual offenders. A secondary purpose was to determine whether the resulting clusters were independent of characteristics of the offense and of the victim, and the relationship between the offender and victim. These data were analyzed and viewed through the lens of the attachment theory. This study used a nonexperimental correlational and static group comparison archival research designs and secondary analysis …

Nursing Faculty Experiences With Interactive Games And Gaming And Student Preparedness, Laura S. Dana

Walden Dissertations and Doctoral Studies

Although instructional strategies to enhance student learning is a critical component of the faculty role, nursing education has been slow to incorporate games and gaming into the learning environment. The primary purpose for this qualitative phenomenological research study was to explore the lived experiences of nursing faculty of associate degree programs, specifically regarding the use of games and gaming as interactive, experiential teaching and learning strategies. This study was designed to answer the question, “What are the lived experiences of faculty who use games and gaming as instructional approaches in associate degree nursing (ADN) education.” Through one-on-one interviews via Zoom …

Emergency Department Operational Strategies, Joyce W. Davis

Walden Dissertations and Doctoral Studies

AbstractEmergency Department Operational Strategies by Joyce W. Davis MBA/MHA, Pfeiffer University, 2011 BS, North Carolina A&T State University, 1980

Doctoral Study Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Business Administration

Walden University December 2022

Elementary General Education Teachers' Perceptions Of Effective Math Instruction For Students With Disabilities, Donna Denk

Walden Dissertations and Doctoral Studies

Abstract

Barriers to implementing effective math instruction have been a focus of scholars because they are a problem in

supporting students with disabilities. Researchers have demonstrated that general education teachers often have little

knowledge about effective interventions for students with disabilities and the barriers to achieving such instruction. The

purpose of this study was to investigate and understand general education teachers’ perceptions of effective math

instruction, and barriers to it, for fourth and fifth grade students with disabilities. The conceptual framework was based on

Baroody’s stages of math fact acquisition, which predicates that three developmental stages should be the basis …

Leadership Strategies To Reduce Cyberattacks During A Merger, Denise Durham

Walden Dissertations and Doctoral Studies

The difficulty that leaders in the wine industry have in rapidly responding to cyber threats to secure sensitive information and intellectual property while undertaking a merger can have a direct economic cost and disrupt the merger. Grounded in Habermas’s systems theory, the purpose of this single case study was to examine strategies used to mitigate the risk from cyberattacks during a merger. The participants were five business leaders in a wine company in Northern California. Data were collected using semistructured interviews, company documentation, and publicly available documents. Through thematic analysis, four themes were identified: protection of data integrity, formal and …

Optimization Of Financial Performance In E-Commerce, Ishmael Fleming

Walden Dissertations and Doctoral Studies

Financial performance is a challenge for business managers in the e-commerce industry that lack the knowledge to meet their operational objectives consistently. Business managers are concerned with poor financial performance due to the adverse impact on business sustainability. Grounded in total quality management theory, the purpose of this quantitative correlational study was to examine the relationship between working capital management (WCM), operating expense ratio (OER), and e-commerce financial performance. Archival data were collected from 107 small- to medium-sized publicly traded e-commerce businesses headquartered in the United States from 2019 to 2021. The results of the multiple linear regression were significant …

Barriers To Completing Bachelor’S Degrees For Nontraditional Nebraska Students, Melba Dinorah Fix-Padilla

Walden Dissertations and Doctoral Studies

AbstractNontraditional students in Nebraska colleges have lower graduation rates than traditional students. Approximately 40% of nontraditional students at a private college withdraw before completing a degree. The purpose of this qualitative study was to discover barriers preventing nontraditional students from completing a degree. The conceptual frameworks were Tinto’s student integration model and Bean’s student attrition model, which involve financial, social, and academic completion resources. Research questions involve financial, social, and academic challenges preventing nontraditional students from completing a degree. The sample consisted of eight nontraditional undergraduate students between the ages of 25 to 65, an undergraduate administrator, and a focus …

Teachers’ Perceptions Regarding Implementing Student-Centered Instructional Practices In Reading Comprehension, Gloria Nnenna Edeh-Okwuosah

Walden Dissertations and Doctoral Studies

The problem addressed in this study was that the English as foreign language teachers in five government elementary schools were not consistently instructing in a manner that contributed to a student-centered learning environment when teaching reading comprehension. The purpose of this basic qualitative study was to explore the perceptions of English as foreign language teachers in the five government elementary schools regarding implementing student-centered instructional strategies when teaching reading comprehension. Weimer’s learner-centered teaching served as the conceptual framework. The research questions focused on English as foreign language teachers’ perceptions regarding implementing student-centered practices when teaching reading comprehension. Data were collected …

Information Communication And Technology Strategies For Improving Nonprofit Organizations’ Effectiveness, Richard T. Evans

Walden Dissertations and Doctoral Studies

AbstractSome nonprofit organization leaders lack strategies to incorporate information communication and technology (ICT) into the business operations of organizations. A nonprofit organization lacking strategies involving integrating technology into their business operations decreases the likelihood of being efficient, productive, and effective. Grounded in the information technology (IT) competency model, the purpose of this qualitative single case study was to explore the ICT strategies of a nonprofit organization leader in the south suburbs of Chicago. Data were collected through semi-structured interviews, direct observations, and reviews of organizational documents. The Marshall and Rossman seven-step process was used to analyze data. Three themes emerged …

Systematic Approach To Recruiting And Retention Of Instrumental Students In Division One University Marching Band, Michael G. Yopp

Doctoral Dissertations and Projects

This study examines recruitment and retention in Division One (D1) university marching bands, while understanding high school and university directors’ perspectives and impact on student choice. This project surveyed university band directors, seeking commonalities for recruiting and retention of instrumental students. Based on the results, universities will have better strategies on what, how, and why recruitment and retention issues should be addressed. Student enrollment is important to the well-being, development, and continuity of marching band programs. They may result in better recruitment and retention for other university ensembles, applied studios, the music department, and the university enrollment overall. This study …

Preparing Teachers For Culturally Responsive/Relevant Pedagogy (Crp): A Critical Review Of Research, Wen-Chia Chang, Kara Viesca

Department of Teaching, Learning, and Teacher Education: Faculty Publications

Context: Proposed more than two decades ago, culturally relevant/responsive teaching or pedagogy (CRP) is one promising approach to transform education experiences of historically marginalized groups. The development of CRP has since inspired changes in teacher education programs and resulted in considerable research on preparing teachers for CRP. However, critics have argued that much work on CRP has not fulfilled its transformative potential of addressing racism and the white-supremacist foundations underlying teacher education research and practice, and have urged CRP research to grow from the existing knowledge base and to innovate.

Purpose of Study: This study critically examines the research practices …

Quality Content Teaching For Multilingual Students: An International Examination Of Excellence In Instructional Practices In Four Countries, Kara Viesca, Annela Teemant, Jenni Alisaari, Johanna Ennser-Kananen, Naomi Flynn, Svenja Hammer, Sara Routarinne

Department of Teaching, Learning, and Teacher Education: Faculty Publications

Observations of Pedagogical Excellence of Teaching Across Nations (OPETAN) is a mixed methods observation study of 31 content teachers, most nominated for their excellence in teaching multilingual students in Germany, Finland, the US, and England. The study relied on an observation rubric that operationalizes seven Enduring Principles of Learning grounded in critical sociocultural theory and pedagogy. Findings revealed excellent teachers emphasize complex thinking, language use, and modeling. Teacher use of small groups, contextualization, and equity-focused practices were areas of potential growth. International research holds promise for understanding and improving K-12 content teaching and teacher education for teachers of multilingual learners.

(Re)Turning To Freirean Philosophy In Preparing Content Teachers To Work With Multilingual Students, Kara Viesca, Peiwen Wang, Brandon Heinz, Alexa Yunes-Koch

Department of Teaching, Learning, and Teacher Education: Faculty Publications

In 2019, Bettina Love published a call for abolitionist teaching, an effort for educational freedom and racial justice. In her work, she centered the role of theory in teaching calling it a "North Star." She suggested that theory provides teachers a "steadfast tool" that explains the experiences of people minoritized due to racism, sexism, ableism, linguicism, etc., as well as provides language for and knowledge about intersectional issues of injustice. Love literally calls theory a "practical guide" as well as a "location for healing" (Love, 2019, p. 132).

The work of Paulo Freire has long served as the kind of …

Novice General Education Teachers’ Perceptions Of Preparedness In U.S. Public Schools: The Impact Of Learning About And Working With Multilingual Students, Lydiah Kananu Kiramba, Qizhen Deng, Kara Viesca

Department of Teaching, Learning, and Teacher Education: Faculty Publications

This study examined perceptions of preparedness among novice general education teachers using 2015/ 2016 National Teacher and Principal Survey data. Results show that teachers with training in teaching multilingual learners reported higher perceived preparedness than those without across all five general aspects of teaching (i.e., instructional methods, teaching subject matters, assessing students, differentiating instruction, and using assessment data to inform instruction). Further, teacher preparedness in differentiating instruction was positively associated with the percentage of multilingual learners in a teacher's classroom. Findings suggest that learning to teach multilingual learners supports novice general content teachers to feel more prepared as teachers overall.

Prefrontal Glutamate Neurotransmission In Ptsd: A Novel Approach To Estimate Synaptic Strength In Vivo In Humans, Lynnette A Averill, Lihong Jiang, Prerana Purohit, Anastasia Coppoli, Christopher L Averill, Jeremy Roscoe, Benjamin Kelmendi, Henk M De Feyter, Robin A De Graaf, Ralitza Gueorguieva, Gerard Sanacora, John H Krystal, Douglas L Rothman, Graeme F Mason, Chadi G Abdallah

Staff and Researcher Publications

Background: Trauma and chronic stress are believed to induce and exacerbate psychopathology by disrupting glutamate synaptic strength. However, in vivo in human methods to estimate synaptic strength are limited. In this study, we established a novel putative biomarker of glutamatergic synaptic strength, termed energy-per-cycle (EPC). Then, we used EPC to investigate the role of prefrontal neurotransmission in trauma-related psychopathology.

Methods: Healthy controls (n = 18) and patients with posttraumatic stress (PTSD; n = 16) completed 13C-acetate magnetic resonance spectroscopy (MRS) scans to estimate prefrontal EPC, which is the ratio of neuronal energetic needs per glutamate neurotransmission cycle (VTCA/VCycle).

Results: Patients …

Turning Data Into Better Mental Health: Past, Present, And Future, Nidal Moukaddam, Akane Sano, Ramiro Salas, Zakia Hammal, Ashutosh Sabharwal

Staff and Researcher Publications

In this mini-review, we discuss the fundamentals of using technology in mental health diagnosis and tracking. We highlight those principles using two clinical concepts: (1) cravings and relapse in the context of addictive disorders and (2) anhedonia in the context of depression. This manuscript is useful for both clinicians wanting to understand the scope of technology use in psychiatry and for computer scientists and engineers wishing to assess psychiatric frameworks useful for diagnosis and treatment. The increase in smartphone ownership and internet connectivity, as well as the accelerated development of wearable devices, have made the observation and analysis of human …

Gut Microbiota From Sjögren Syndrome Patients Causes Decreased T Regulatory Cells In The Lymphoid Organs And Desiccation-Induced Corneal Barrier Disruption In Mice, Laura Schaefer, Claudia M Trujillo-Vargas, Firas S Midani, Stephen C Pflugfelder, Robert A Britton, Cintia S De Paiva

Faculty, Staff and Students Publications

Sjögren syndrome (SS) is an autoimmune inflammatory disorder characterized by secretory dysfunction in the eye and mouth; in the eye, this results in tear film instability, reduced tear production, and corneal barrier disruption. A growing number of studies show that homeostasis of the ocular surface is impacted by the intestinal microbiome, and several 16S sequencing studies have demonstrated dysbiosis of the intestinal microbiota in SS patients. In this study, we utilized metagenomic sequencing to perform a deeper analysis of the intestinal microbiome using stools collected from sex- and age-matched healthy (n = 20), dry eye (n = 4) …

A Concept Approach For Network Slicing In Wireless Mesh Disaster Networks, A Seng, U Trick, A Lehmann, B Ghita

School of Engineering, Computing and Mathematics

No abstract provided.

Increased Virus Dissemination Leads To Enhanced Lung Injury But Not Inflammation During Influenza-Associated Secondary Bacterial Infection, Amanda P Smith, Lindey C Lane, Ivan Ramirez Zuniga, David M Moquin, Peter Vogel, Amber M Smith

2020-Current year OA Pubs

Secondary bacterial infections increase influenza-related morbidity and mortality, particularly if acquired after 5-7 d from the viral onset. Synergistic host responses and direct pathogen-pathogen interactions are thought to lead to a state of hyperinflammation, but the kinetics of the lung pathology have not yet been detailed, and identifying the contribution of different mechanisms to disease is difficult because these may change over time. To address this gap, we examined host-pathogen and lung pathology dynamics following a secondary bacterial infection initiated at different time points after influenza within a murine model. We then used a mathematical approach to quantify the increased …

Developments And Industrial Applications Of Basalt Fibre Reinforced Composite Materials, Indraneel R. Chowdhury, Richard Pemberton, John Summerscales

School of Engineering, Computing and Mathematics

Basalt mineral fibre, made directly from basalt rock, has good mechanical behavior, superior thermal stability, better chemical durability, good moisture resistance and can easily be recycled when compared to E-glass fibres (borosilicate glass is called ‘E-glass’ or ‘electric al-grade glass’ because of its high electrical resistance) which are traditionally used in structural composites for industrial applications. Industrial adoption of basalt fibre reinforced composites (FRC) is still very low mainly due to inadequate data and lower production volumes leading to higher cost. These reasons constrain the composites industry from seriously considering basalt as a potential alternative to conventional (e.g., E-glass) fibre …

Perishable Goods Versus Re-Tradable Assets: A Theoretical Reappraisal Of A Fundamental Dichotomy, Sabiou M. Inoua, Vernon L. Smith

ESI Working Papers

Although various typologies of goods are commonly adopted in economics, one stood out in market experiment results contrasting market stability and efficiency with market instability: non-durable, or perishable, goods (Smith, 1962) versus durable re-tradable assets (Smith et al., 1988; Dickhaut et al., 2012; S. D. Gjerstad et al., 2015). This dichotomy of goods also proved central for understanding macroeconomic instability more broadly: about 75% of consumer spending is bought for final consumption, and is a rock of stability; instability arises from the other 25% re-tradable goods, most prominently, houses (S. D. Gjerstad & Smith, 2014). In this chapter, we revisit …

Extractable Entanglement From A Euclidean Hourglass, Takanori Anegawa, Norihiro Iizuka, Daniel Kabat

Publications and Research

We previously proposed that entanglement across a planar surface can be obtained from the partition function on a Euclidean hourglass geometry. Here we extend the prescription to spherical entangling surfaces in conformal field theory. We use the prescription to evaluate log terms in the entropy of a conformal field theory in two dimensions, a conformally coupled scalar in four dimensions, and a Maxwell field in four dimensions. For Maxwell we reproduce the extractable entropy obtained by Soni and Trivedi. We take this as evidence that the hourglass prescription provides a Euclidean technique for evaluating extractable entropy in quantum field theory.

Magnetoexcitons In Phosphorene Monolayers, Bilayers, And Van Der Waals Heterostructures, Roman Ya. Kezerashvili, Anastasia Spiridonova, Andrew Dublin

Publications and Research

We study direct and indirect excitons in Rydberg states in phosphorene monolayers, bilayers, and van der Waals (vdW) heterostructure in an external magnetic field within the framework of the effective-mass approximation. The magnetic field is applied perpendicular to the monolayer or heterostructure and is varied between 0 and 60 T. Binding energies of magnetoexcitons are calculated by numerical integration of the Schrödinger equation using the Rytova-Keldysh potential for direct magnetoexcitons and both the Rytova-Keldysh and Coulomb potentials for indirect magnetoexcitons. The latter aids in the understanding of the role of screening in phosphorene. We report the magnetic field energy contribution …

Reconsidering The Nomos In Today’S Media Environment, Kimberlianne Podlas

Touro Law Review

Today’s media landscape is wholly unlike that which existed when Cover first discussed narrative and the nomos; specifically, the status of television as both a cultural messenger and object of scholarly study has changed significantly. Accordingly, this article contemplates narrative in the contemporary media environment, specifically, television as an essential source of narratives. To enhance understandings of the roles television narratives play and which narratives play a role, this article employs an empirical perspective. Surveying Media Theory, it outlines research on television effects, including when and why television’s representations of law can impact audience attitudes, behaviors, perceptions, knowledge, and judgements. …