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Nucleation-Accumulation Mode Trade-Off In Non-Volatile Particle Emissions From A Small Non-Road Small Diesel Engine, Indranil Brahma, Odinmma John-Paul Ofili

Faculty Journal Articles

Small (< 8 kW) non-road engines are a significant source of pollutants such as particle number (PN) emissions. Many small non-road engines do not have diesel particulate filters (DPFs). They are so designed that air–fuel ratio (AFR) can be adjusted to control visible diesel smoke and particulate matter (PM) resulting from larger accumulation mode particles. However, the effect of AFR variation on smaller nucleation mode nanoparticle emissions is not well understood. Several studies on larger engines have reported a trade-off between smaller and larger particles. In this study, AFR was independently varied over the entire engine map of a naturally aspirated (NA) non-road small diesel engine using forced induction (FI) of externally compressed air. AFR’s ranged from 57 to 239 compared to the design range of 23–92 for the engine, including unusually high AFR’s at full-load operation, not previously reported for conventional combustion. As expected, larger accumulation mode particles were lowered (up to 15 times) for FI operation. However, the smaller nucleation mode nanoparticles increased up to 15 times. Accumulation mode particles stopped decreasing above an AFR threshold while nucleation particles continuously increased. In-cylinder combustion analysis showed a slightly smaller ignition delay and higher burn rate for FI cases relative to NA operation. Much higher peak cylinder pressures were accompanied by much lower combustion and exhaust gas temperatures (EGT), due to higher in-cylinder mass during FI operation. Peak nucleation mode emissions were shown to be negatively correlated to EGT for all the data, collapsing on a single curve. This is consistent with some other studies reporting increased nucleation mode emissions (and higher accumulation mode particles) with decreased load, lower speed, lower EGR, advanced combustion phasing, and higher injection pressure, all of which reduce EGT. The nucleation-accumulation trade-off has been explained by the ‘adsorption hypothesis’ by some investigators. In the current work, an alternative/supplemental argument has been made for the possibility that lower cylinder temperatures during the late-burning phase (correlated to lower EGT) phase hampers oxidation of nucleation mode particles and increases nucleation mode emissions.

Whalesong 2022-12-01 (V.42 No.5), Mike Flunker, Aj Schultz, Lucas Stewart, Teigan Akagi, Liz Fruechtnict, Carrie Kline, Shaelene Moler, Olive Brend

Whalesong

No abstract provided.

Teacher Decision Making In Teaching About The Holocaust Through Art, Julie Bell, Connie Schaffer, Kimberly Gangwish

Teacher Education Faculty Publications

The primary objective of this comparative case study was to explore how secondary teachers make decisions regarding teaching about the Holocaust using the art of Samuel Bak as text. The researchers analyzed self-created curriculum materials, responses to a questionnaire about teacher decision-making processes, and interviews with three secondary teachers whose students visited an exhibit of Bak’s art. The researchers find that teachers have agency to make decisions based on materials, standards and curriculum, and personal connections to the content while relying on a student-centered approach. Implications for further research include a deeper exploration of teachers’ awareness of their decision making.

Designing For Best Use Of The Downtown I-345 Corridor In Dallas, Tx: Stakeholder Perspectives, Matthew Thornton

Landscape Architecture Masters & Design Theses - Archive

What is a city? It’s more than a location where many people live and work. It is a conglomeration of shared experience over generations. One generation informs the next, which informs how each subsequent generation adds to the development of their shared home. This is what gives each city its own unique form, character, and identity. But what happens if a city repeatedly outgrows itself, disconnects its communities, and demolishes the physical memory of its own cultural history? Dallas, Texas is one such city confronting these issues and is perceived as one without significant place memory or culture (if not …

Clinical Characteristics And Electrophysiologic Properties Of Scn5a Variants In Fever-Induced Brugada Syndrome, Gan-Xiao Chen, Hector Barajas-Martinez, Giuseppe Ciconte, Cheng-I Wu, Michelle M Monasky, Hao Xia, Bian Li, John A Capra, Kai Guo, Zhong-He Zhang, Xiu Chen, Bo Yang, Hong Jiang, Gary Tse, Chloe Miu Mak, Yoshiyasu Aizawa, Michael H Gollob, Charles Antzelevitch, Arthur A M Wilde, Carlo Pappone, Dan Hu

Division of Cardiology Faculty Papers

Background: Brugada syndrome (BrS) is a severe inherited arrhythmia syndrome that can be unmasked by fever.

Methods: A multicentre clinical analysis was performed in 261 patients diagnosed with fever-induced BrS, including 198 (75.9%) and 27 (10.3%) patients who received next-generation genetic sequencing and epicardial arrhythmogenic substrate (AS) mapping, respectively.

Findings: In fever-induced BrS patients, pathogenic or likely pathogenic (P/LP) SCN5A variant carriers developed fever-induced BrS at a younger age, and more often in females and those of Caucasian descent. They exhibited significant electrophysical abnormalities, including a larger epicardial AS area, and more prolonged abnormal epicardial electrograms. During a median follow-up …

Foundational Support Through Professional Sport: A Case Study On The Chicago Bulls Charities, Austin Schroeder

Nonprofit and NGO Studies Student Projects

This case study on the Chicago Bulls Charities (CBC) offers praise as well as criticism into the professional sport organization (PSO) as a whole along with their corresponding foundation. Corporate social responsibility (CSR) activities are developed and provided by the Chicago Bulls PSO and is not an element of the CBCs mission, justifying a deep dive into the PSO and their CSR activities along with the foundation, the original focus of this study. With limited literature on the topic of corporate philanthropy in professional sports, and with more research in CSR in this field, CSR was added to the research …

The Common Law As Statutory Backdrop, Anita S. Krishnakumar

Georgetown Law Faculty Publications and Other Works

Amidst the whirl of commentary about how the U.S. Supreme Court has become increasingly textualist and what precise shape modern textualism should take, the Court’s continued reliance on one decidedly atextual interpretive tool has gone largely unnoticed — the common law. Indeed, the common law has played an underappreciated, often dispositive, gap-filling role in statutory interpretation for decades, even as the textualist revolution has sidelined other non-text-focused interpretive tools. But despite the persistent role that the common law has played in statutory interpretation cases, the use of common law rules and definitions as an interpretive resource is surprisingly understudied and …

An Imaging Mass Spectrometry Investigation Into The N-Linked Glycosylation Landscape Of Pancreatic Ductal Adenocarcinoma And The Development Of Associated Tools For Enhanced Glycan Separation And Characterization, Colin Mcdowell

MUSC Theses and Dissertations

The severity of pancreatic ductal adenocarcinoma (PDAC) is largely attributed to a failure to detect the disease before metastatic spread has occurred. CA19-9, a carbohydrate biomarker, is used clinically to surveille disease progression, but due to specificity challenges is not suitable for early discovery. As CA19-9 and other prospective markers are glycan epitopes, there is great clinical interest in understanding the glycobiology of pancreatic cancer. Unfortunately, few studies have been able to link glycosylation changes directly to pancreatic tumors and instead have focused on peripheral glycan alterations in the serum of PDAC patients. To address this gap in our understanding, …

Board Of Directors Meeting Minutes (December 12, 2022), Dmacc

Board of Directors Meeting Minutes

This file contains the minutes from the Des Moines Area Community College Board meeting held on December 12, 2022.

Explaining Suharto's Rise And Fall: International And Domestic Variables, Julia Batanghari

Undergraduate Honors Theses

For three decades (1968-1998), Indonesia was led by President Suharto, whose authoritarian military regime is remembered for its corruption and brutality. This paper offers an analysis of Suharto’s rule through the lens of two events: his 1965 purge of local ‘communists’ and the riots of May 1998. Drawing comparisons between the two, I delve into systemic causes by considering the influence of domestic and international variables. Exploring links between intergroup accommodation and democracy reveals that Suharto’s lack of ethnic, socioeconomic, and religious inclusivity paved the way not only for the anti-Chinese sentiment which pervaded Indonesian society during his presidency, but …

A Preliminary Assessment Of Compassion Fatigue In Chimpanzee Caregivers, Mary Lee A. Jensvold

Anthropology and Museum Studies Faculty Scholarship

Compassion fatigue is defined as “traumatization of helpers through their efforts at helping others”. It has negative effects on clinicians including reduced satisfaction with work, fatigue, irritability, dread of going to work, and lack of joy in life. It is correlated with patients’ decreased satisfaction with care. Compassion fatigue occurs in a variety of helping professions including educators, social workers, mental health clinicians, and it also appears in nonhuman animal care workers. This study surveyed caregivers of chimpanzees using the ProQOL-V to assess the prevalence of compassion fatigue among this group. Compassion satisfaction is higher than many other types of …

Efficacy And Safety Of Fecal Microbiota Transplantation In Treatment Of Clostridioides Difficile Infection Among Pediatric Patients: A Systematic Review And Meta-Analysis, Kyaw Min Tun, Mark Hsu, Kavita Batra, Chun-Han Lo, Tooba Laeeq, Tahne Vongsavath, Salman Mohammed, Annie S. Hong Md

Department of Internal Medicine Faculty Research

Background and Aims: Cases of Clostridioides difficile infection have been rising among the pediatric and adolescent population. Fecal microbiota transplantation (FMT) has emerged as an alternative therapy for recurrent C. difficile infection. We aim to perform the first systematic review and meta-analysis investigating the safety and efficacy of fecal microbiota transplantation for C. difficile infection in children and adolescents. Methods: A literature search was performed using variations of the keywords “pediatrics”, “C. difficile infection”, and “fecal microbiota transplantation” in PubMed, EMBASE, CINAHL, Cochrane, and Google Scholar from inception to 30 June 2022. The resulting 575 articles were independently screened by …

20221212_Access Pediatrics & Access Surgery Added To Hslic's Collection, Robyn Gleasner

HSLIC Blog Post

No abstract provided.

Parental Warmth And Disciplinary Strategies In Two-Parent-Adoptive And Biological Families, Jordan Coburn

Theses and Dissertations

Adopted children enter families with parents who on average are older, have higher income, and have more education than other family structures. Because adopted children are moving into families with more resources, research suggests that they would do just as well as, and perhaps even better than, children in biological two-parent households. However, this is not always the case. Understanding how different variables could offset any negative results of adoption is a puzzle that researchers are continually exploring. Previous research has investigated differences in investments from adoptive and biological parents through multiple theoretical lenses. I seek to add to current …

High School Dropouts, Higher Education Dreams, And Achievement: A Six-Year Study Of A High-Stakes Test In Brazil, Eveline Miranda

Theses and Dissertations

Rumberger (2020) observed that "dropping out of school has economic and social consequences both for dropouts themselves and for the country as a whole" (p. 151). Every year, many Brazilians drop out of school due to work, early pregnancies, marriage, drug consumption, crime, etc. Dropping out of school can occur due to learning challenges, poor attendance, discipline problems, or a lack of access to high school institutions. Dropouts can experience depression and anxiety and are more likely to attempt suicide. The present dissertation includes two different papers about dropouts. The first paper uses fixed effect regression to show the main …

Teaching Social-Emotional Learning To Children With Autism Using Animated Avatar Video Modeling, Emelie Davis

Theses and Dissertations

People with a diagnosis of autism spectrum disorder (ASD) often have difficulties understanding or applying skills related to Social-Emotional Learning (SEL). An individual having a better understanding of SEL concepts is generally associated with more fulfilling connections with others and increased satisfaction in life. Since people with ASD tend to have greater success with learning in structured environments, we created a module to teach these skills using Nearpod. These modules were created with videos of a person embodying a cartoon dog face using Animoji for two reasons; because the animation was meant to appeal to children, and the creation was …

Issues In Melanoma Detection: Semisupervised Deep Learning Algorithm Development Via A Combination Of Human And Artificial Intelligence, Xinyuan Zhang, Ziqian Xie, Yang Xiang, Imran Baig, Mena Kozman, Carly Stender, Luca Giancardo, Cui Tao

Faculty, Staff and Student Publications

BACKGROUND: Automatic skin lesion recognition has shown to be effective in increasing access to reliable dermatology evaluation; however, most existing algorithms rely solely on images. Many diagnostic rules, including the 3-point checklist, are not considered by artificial intelligence algorithms, which comprise human knowledge and reflect the diagnosis process of human experts.

OBJECTIVE: In this paper, we aimed to develop a semisupervised model that can not only integrate the dermoscopic features and scoring rule from the 3-point checklist but also automate the feature-annotation process.

METHODS: We first trained the semisupervised model on a small, annotated data set with disease and dermoscopic …

Ohio University Faculty Senate Minutes December 12, 2022, Ohio University Faculty Senate

Faculty Senate Minutes

No abstract provided.

Identity Work To Teach Mathematics For Social Justice, Navy B. Dixon

Theses and Dissertations

In this thesis, mathematics educators are conceptualized as individuals with multiple, simultaneous figured worlds that inform their decisions while planning. The study explores how two mathematics educators negotiated and orchestrated their figured worlds to plan two mathematics lessons for social justice. The results highlight how numerous the figured worlds each participant surfaced through background interviews. Some of the figured worlds were elicited by the interview questions (i.e., Race, Family, Social Justice Teaching) but other figured worlds organically surfaced through the interviews (i.e., Sexuality, Community, Activism, Critical Information Consumption). A discursive analysis of a selection of these figured worlds revealed conceptualizations …

Icc Agenda 12-6-22, Angela Brock

Individual Course Committee (ICC)

No abstract provided.

Place Cells Dynamically Refine Grid Cell Activities To Reduce Error Accumulation During Path Integration In A Continuous Attractor Model, Jose A Fernandez-Leon, Ahmet Kerim Uysal, Daoyun Ji

Faculty, Staff and Students Publications

Navigation is one of the most fundamental skills of animals. During spatial navigation, grid cells in the medial entorhinal cortex process speed and direction of the animal to map the environment. Hippocampal place cells, in turn, encode place using sensory signals and reduce the accumulated error of grid cells for path integration. Although both cell types are part of the path integration system, the dynamic relationship between place and grid cells and the error reduction mechanism is yet to be understood. We implemented a realistic model of grid cells based on a continuous attractor model. The grid cell model was …

The Pendulum Of Juvenile Justice Policy: Examining The Creation And Implementation Of New York State’S Raise The Age Legislation, Mary Xitco

Theses

This paper discusses changes in juvenile justice policy, focusing largely on the last 40 years. Juvenile justice policy has historically transitioned quickly from conservative punitive strategies to liberal rehabilitative and lenient strategies. We see this most recently with the tough on crime strategies of the 1990s lowering the age of responsibility to now where states have decided to start raising the age of criminal responsibility up to 18 years old. This paper looks closely at what caused this most recent shift and gives historical context as to how juvenile justice policy trends may have predicted this.

The Geriatric Emergency Department At The University Of California San Francisco: Structures, Roles, And Lessons Learned, Todd James

Journal of Geriatric Emergency Medicine

No abstract provided.

Sociology Between The Gaps Volume 7 (2022)

Sociology Between the Gaps: Forgotten and Neglected Topics

No abstract provided.

A Phenomenological Study Of Collegiate Recovery Leadership, Marni Goldberg

Teacher Education, Educational Leadership & Policy ETDs

Due to the marginalized status of the population they serve, collegiate recovery programs are generally underfunded and employ one staff member who typically holds other job tasks in addition to those of collegiate recovery leader. The consequence of the varied nature by which collegiate recovery programs are founded and implemented is inconsistency, which can threaten the longevity of the field. The purpose of this phenomenological study was to elicit information directly from collegiate recovery leaders to gain a deeper understanding of their lived experience, in order to determine how to best serve and support higher education students in recovery from …

Amber Kujath '97 To Lead Illinois Wesleyan School Of Nursing, Illinois Wesleyan University

News and Events (Discontinued Series)

No abstract provided.

Preventative Healthcare Programs, Caileb T. Reilly

Honors Thesis

The healthcare system in the United States is struggling with excessive costs and disproportionate quality measures. While the U.S. spends the most on healthcare in the world, the quality of the healthcare is not reflected in this cost. With excessive spending being the strategy to improve quality in the past, new strategies need to be implemented to improve quality as increased spending is not raising this statistic. One factor that can improve quality and reduce costs is the introduction and utilization of preventative healthcare programs. These programs are built to keep at-risk populations from developing serious, permanent diseases that deplete …

Gabapentin Disrupts Binding Of Perlecan To The Α 2Δ1 Voltage Sensitive Calcium Channel Subunit And Impairs Skeletal Mechanosensation, Perla C Reyes Fernandez, Christian S Wright, Adrianna N Masterson, Xin Yi, Tristen V Tellman, Andrei Bonteanu, Katie Rust, Megan L Noonan, Kenneth E White, Karl J Lewis, Uma Sankar, Julia M Hum, Gregory Bix, Danielle Wu, Alexander G Robling, Rajesh Sardar, Mary C Farach-Carson, William R Thompson

Faculty, Staff and Student Publications

Our understanding of how osteocytes, the principal mechanosensors within bone, sense and perceive force remains unclear. Previous work identified "tethering elements" (TEs) spanning the pericellular space of osteocytes and transmitting mechanical information into biochemical signals. While we identified the heparan sulfate proteoglycan perlecan (PLN) as a component of these TEs, PLN must attach to the cell surface to induce biochemical responses. As voltage-sensitive calcium channels (VSCCs) are critical for bone mechanotransduction, we hypothesized that PLN binds the extracellular α2δ1 subunit of VSCCs to couple the bone matrix to the osteocyte membrane. Here, we showed co-localization of PLN and α2δ1 along …

Mapping Single-Cell Transcriptomes In The Intra-Tumoral And Associated Territories Of Kidney Cancer, Ruoyan Li, John R Ferdinand, Kevin W Loudon, Georgina S Bowyer, Sean Laidlaw, Francesc Muyas, Lira Mamanova, Joana B Neves, Liam Bolt, Eirini S Fasouli, Andrew R J Lawson, Matthew D Young, Yvette Hooks, Thomas R W Oliver, Timothy M Butler, James N Armitage, Tev Aho, Antony C P Riddick, Vincent Gnanapragasam, Sarah J Welsh, Kerstin B Meyer, Anne Y Warren, Maxine G B Tran, Grant D Stewart, Isidro Cortés-Ciriano, Sam Behjati, Menna R Clatworthy, Peter J Campbell, Sarah A Teichmann, Thomas J Mitchell

Faculty, Staff and Student Publications

Tumor behavior is intricately dependent on the oncogenic properties of cancer cells and their multi-cellular interactions. To understand these dependencies within the wider microenvironment, we studied over 270,000 single-cell transcriptomes and 100 microdissected whole exomes from 12 patients with kidney tumors, prior to validation using spatial transcriptomics. Tissues were sampled from multiple regions of the tumor core, the tumor-normal interface, normal surrounding tissues, and peripheral blood. We find that the tissue-type location of CD8+ T cell clonotypes largely defines their exhaustion state with intra-tumoral spatial heterogeneity that is not well explained by somatic heterogeneity. De novo mutation calling from single-cell …

Gambaran Faktor Kegagalan Laten Dan Kegagalan Aktif Pada Kecelakaan Transportasi Darat Di Indonesia Tahun 2019 – 2021, Rahma Laili Khairina, Dadan Erwandi

National Journal of Occupational Health and Safety

Road transportation accidents are the eighth leading cause of death worldwide, reaching 1.35 million people annually (WHO, 2021). Data from the NTMC Korlantas Polri for 2019-2021 shows that the number of road transportation accidents in Indonesia is above 100 thousand every year. This study identifies latent and active failure factors contributing to Indonesia's land transportation accidents to determine the causes of accidents comprehensively. This study uses secondary data with 320,084 traffic accident case reports in 2019-2021 belonging to the NTMC Korlantas Polri. The method used is qualitative by analyzing based on the Swiss Cheese Model. The results of this study …