Extremely primitive groups and linear spaces

A finite non-regular primitive permutation group $G$ is extremely primitive if a point stabiliser acts primitively on each of its nontrivial orbits. Such groups have been studied for almost a century, finding various applications. The classification of extremely primitive groups was recently completed by Burness and Lee, who relied on an earlier classification of soluble extremely primitive groups by Mann, Praeger and Seress. Unfortunately, there is an inaccuracy in the latter classification. We correct this mistake, and also investigate regular linear spaces which admit groups of automorphisms that are extremely primitive on points.Comment: 11 page

Experimenting with Cigarettes and Physical Activity Among Mexican Origin Youth: A Cross Sectional Analysis of the Interdependent Associations Among Sensation Seeking, Acculturation, and Gender

Sensation seeking tendencies tend to manifest during adolescence and are associated with both health-compromising behaviors and health-enhancing behaviors. The purpose of this study is to evaluate the relationship between sensation seeking and physical activity, a health-enhancing behavior, and between sensation seeking and experimenting with cigarettes, a health compromising-behavior, among a cohort of Mexican origin adolescents residing in the United States with different levels of acculturation. Methods: In 2009, 1,154 Mexican origin youth (50.5% girls, mean age 14.3 years (SD = 1.04)) provided data on smoking behavior, physical activity, linguistic acculturation, and sensation seeking. We conducted Pearson's chi(2) tests to examine the associations between categorical demographic characteristics (i.e. gender, age, country of birth and parental educational attainment) and both cigarette experimentation and physical activity and Student's t-tests to examine mean differences on the continuous variables (i.e. sensation seeking subscale) by the behaviors. We examined mean differences in the demographic characteristics, acculturation, and both behaviors for each of the sensation seeking subscales using analysis of variance (ANOVA). To examine relationships between the sensation seeking subscales, gender, and both behaviors, at different levels of acculturation we completed unconditional logistic regression analyses stratified by level of acculturation. Results: Overall, 23.3% had experimented with cigarettes and 29.0% reported being physically active for at least 60 minutes/day on at least 5 days/week. Experimenting with cigarettes and being physically active were more prevalent among boys than girls. Among girls, higher levels of sensation seeking tendencies were associated with higher levels of acculturation and experimentation with cigarettes, but not with physical activity. Among boys, higher levels of sensation seeking tendencies were associated with higher levels of acculturation, experimenting with cigarettes and being physically active. Conclusions: Our results suggest that interventions designed to prevent smoking among Mexican origin youth may need to address social aspects associated with acculturation, paying close attention to gendered manifestations of sensation seeking.National Cancer Institute CA105203, CA126988Caroline W. Law Fund for Cancer PreventionDan Duncan Family Institute for Cancer Prevention and Risk AssessmentCenter for Health Promotion and Disease Prevention Research in Underserved Population

How Digital Leadership competences and IT Capabilities affect an organization\u27s ability to digitally transform and adopt new technologies

Although much research has been done into the importance of IT Capabilities (ITC), Digital Leadership (DL) and Digital Transformation (DT) with regard to organizations’ firm performance and ability to thrive in the current digital market, there is little research on qualifying which specific ITC and DL competences affect the success of an organization\u27s DT and ultimately impact their ability to adopt newly emerging technologies. This research aims to address the influence of DL and ITC on DT as well as which specific DL competences and ITC might ultimately affect an organization’s ability to successfully adopt newly emerging digital technologies. Quantitative data collected through a survey was used for this analysis. It was found that Architecture Design (DLA5) has the strongest positive affect on DT

Expert elicitation of cost, performance, and RD&D budgets for coal power with CCS

AbstractThere is uncertainty about the ex-ante returns to research, development, and demonstration programs in the United States on carbon capture and sequestration (CCS) technology. To quantify this uncertainty, we conducted a written expert elicitation of thirteen experts in fossil power and CCS technologies from the government, academia, and the private sector. We asked experts to provide their recommended budget and allocation of RD&D funds by specific fossil power and CCS technology and type of RD&D activity (i.e. basic research, applied research, pilot plants, and demonstration plants) for the United States. The elicitation instrument was structured around estimating the cost and performance of coal-fired power plants with and without CCS in the years 2010 and 2030 under four funding scenarios for federal fossil energy RD&D in the USA. The most important areas identified for basic research were chemical looping combustion and membrane technology. The most important area for commercial demonstration was integrated gasification combined cycle (IGCC). There was substantial disagreement between experts on both the current and future capital cost to build a new coal-fired power plant with CCS. There was also disagreement across experts as to whether the capital cost of a new coal plant with CCS would increase or decrease if federal RD&D funding stayed constant at current levels. However, there was a consensus among our experts that accelerated federal RD&D would (weakly) lower the capital cost requirements for a new coal plant with CCS. On average, experts estimated that if their recommended RD&D portfolio was implemented, the capital cost of new coal plants with CCS in 2030 would decrease by 10% in addition to the cost reductions/increases that would occur by 2030 through non-public RD&D related factors

Determinants of Childhood Zoonotic Enteric Infections in a Semirural Community of Quito, Ecuador.

Domestic animals in the household environment have the potential to affect a child's carriage of zoonotic enteric pathogens and risk of diarrhea. This study examines the risk factors associated with pediatric diarrhea and carriage of zoonotic enteric pathogens among children living in communities where smallholder livestock production is prevalent. We conducted an observational study of children younger than 5 years that included the analysis of child (n = 306) and animal (n = 480) fecal samples for Campylobacter spp., atypical enteropathogenic Escherichia coli, Shiga toxin-producing E. coli, Salmonella spp., Yersinia spp., Cryptosporidium parvum, and Giardia lamblia. Among these seven pathogens, Giardia was the most commonly identified pathogen among children and animals in the same household, most of which was found in child-dog pairs. Campylobacter spp. was also relatively common within households, particularly among child-chicken and child-guinea pig pairs. We used multivariable Poisson regression models to assess risk factors associated with a child being positive for at least one zoonotic enteric pathogen or having diarrhea during the last week. Children who interacted with domestic animals-a behavior reported by nearly three-quarters of households owning animals-were at an increased risk of colonization with at least one zoonotic enteric pathogen (prevalence ratio [PR] = 1.56, 95% CI: 1.00-2.42). The risk of diarrhea in the last seven days was elevated but not statistically significant (PR = 2.27, CI: 0.91, 5.67). Interventions that aim to reduce pediatric exposures to enteric pathogens will likely need to be incorporated with approaches that remove animal fecal contamination from the domestic environment and encourage behavior change aimed at reducing children's contact with animal feces through diverse exposure pathways

Effects of vergence findings on prepresbyopic near spectacle prescriptions

Our study investigated effects of vergence findings on both prepresbyopic and presbyopic near spectacle prescriptions. It is possible that individuals with inadequate convergence abilities, maintain excessive accommodative effort for long periods of time to compensate for the convergence problem. This may result in a greater accommodative amplitude than one would expect based on age alone. If true, perhaps vision therapy programs utilizing sustained positive accommodative techniques, may delay the onset of presbyopia and the need for bifocals or reading glasses. We hypothesize that 36 - 50 year olds with convergence deficits will have larger accommodative amplitudes than an age matched control group. Five hundred forty clinic records were sampled from age 36 - 50 from the Pacific University Family Vision Facilities between October 25, 1998 and January 26, 1999. Data from completed vision examinations were collected and analyzed using the Statview Analysis Systems. A significant correlation was found between age and the add prescription, distance phoria and the add prescription, and the fused cross cylinder and the add prescription. No significant correlation was found between any of the near vergence findings (Base Out, Base In phoria, and NPC) amount of add, however, additional studies are needed to further investigate the role distance phoria plays in the amount of add given to patients

Mitigating Climate Change Through Transportation and Land Use Policy

A number of U.S. state and local governments have adopted strategies for reducing greenhouse gas (GHG) emissions from transportation and land development. Although some have made significant progress in reducing GHG emissions from the power sector, transportation emissions in most states continue to rise. This Article details the range of existing and proposed state interventions to reduce transportation sector GHG emissions, analyzes the trade offs of these strategies, and offers recommendations to improve and supplement such initiatives, including strategic use of planning mandates and funding and technical assistance. Additionally, regulating land use, shifting transportation spending, removing barriers to implementing road pricing policies, and altering standards for environmental impact analysis can more effectively reduce transportation-sector GHG emissions and mitigate climate change

Efficient Zero-shot Visual Search via Target and Context-aware Transformer

Visual search is a ubiquitous challenge in natural vision, including daily tasks such as finding a friend in a crowd or searching for a car in a parking lot. Human rely heavily on relevant target features to perform goal-directed visual search. Meanwhile, context is of critical importance for locating a target object in complex scenes as it helps narrow down the search area and makes the search process more efficient. However, few works have combined both target and context information in visual search computational models. Here we propose a zero-shot deep learning architecture, TCT (Target and Context-aware Transformer), that modulates self attention in the Vision Transformer with target and contextual relevant information to enable human-like zero-shot visual search performance. Target modulation is computed as patch-wise local relevance between the target and search images, whereas contextual modulation is applied in a global fashion. We conduct visual search experiments on TCT and other competitive visual search models on three natural scene datasets with varying levels of difficulty. TCT demonstrates human-like performance in terms of search efficiency and beats the SOTA models in challenging visual search tasks. Importantly, TCT generalizes well across datasets with novel objects without retraining or fine-tuning. Furthermore, we also introduce a new dataset to benchmark models for invariant visual search under incongruent contexts. TCT manages to search flexibly via target and context modulation, even under incongruent contexts

ESTUDO SOBRE EVASÃO E RETENÇÃO NO CURSO DE LICENCIATURA EM MATEMÁTICA DO IFC CAMPUS CAMBORIÚ

Este trabalho apresenta as ações desenvolvidas pelo projeto de pesquisa "Estudo sobre evasão e retenção no curso de Licenciatura em Matemática do IFC Campus Camboriú" que está vinculado ao Edital n. 31/2022 - GAB/CAMB. O texto apresenta uma discussão sobre os problemas de evasão e retenção identificados na turma de ingressantes do curso no ano de 2023, trazendo os motivos que foram apresentados. Os dados foram coletados através de entrevistas e questionários, analisados por seu conteúdo. Os principais motivos incluem dificuldades financeiras, falta de rede de apoio, problemas de saúde, dificuldades acadêmicas, falta de motivação e não identificação com o curso. Ao final, os autores concluem o trabalho indicando que a evasão e a retenção são problemas complexos, mas podem ser amenizados com o esforço conjunto da instituição, dos estudantes e da sociedade. É importante lembrar que cada aluno é único e tem suas próprias necessidades e desafios