A Direct Comparison of Lyman-Alpha and Neutral Hydrogen Morphologies

The Lyman-Alpha Reference Sample (LARS) and its extension (eLARS) represent an exhaustive campaign to reverse-engineer galaxies. The main goal is to understand how \lya radiation is transported within galaxies: what fraction of it escapes, and what physical properties affect the \lya morphology and radiative transport (e.g., dust and gas content, metallicity, kinematics, properties of the producing and underlying stellar populations). Two galaxies from the sample, LARS02 and LARS09, were observed using the B and C configurations of the Very Large Array to examine the neutral hydrogen emission, which can be used to determine a galaxy\u27s neutral hydrogen (HI) structure and kinematics. Images of the \HI mass surface density and of the intensity weighted \HI velocity field were created at angular scales of $\sim$8 arcseconds, which corresponds to $\sim$5 kpc for LARS02 and $\sim$8 kpc for LARS09. Extended \HI gas is detected at high significance up to $\sim$30 kpc from the optical body of LARS02. LARS09 has a severely disturbed optical morphology; our new \HI observations reveal that LARS09 is interacting with the nearby field galaxy SDSS J082353.65+280622.2. By combining these moment maps with direct imaging of the \lya morphology from the Hubble Space Telescope, this program has produced the first direct comparison of \lya and \HI morphologies. These observations demonstrate concept for a significant observational campaign to produce similar comparisons in the remaining 40 LARS and eLARS galaxies

Problems Faced by Secondary Technology Education Novice and Veteran Teachers

The purpose of this study was to examine the challenges faced by secondary technology education (TE) teachers in Illinois. Specifically, the study sought to identify and categorize a list of challenges encountered during their first years in the TE profession as well as challenges that veteran TE teachers are facing in their current teaching assignment. Seventy-three TE teachers completed an online questionnaire. Twenty-six challenges were identified and of the top five challenges, only three, equipment, funding, and understanding what TE is were identified as a continuous challenge at each career stage. Knowing the challenges identified by TE teachers at different career stages can assist school administration and TE professionals in providing specific support to address these problematic areas in efforts to improve retention rates among TE teachers

‘Hearts and minds’: association, causation and implication of cognitive impairment in heart failure

The clinical syndrome of heart failure is one of the leading causes of hospitalisation and mortality in older adults. An association between cognitive impairment and heart failure is well described but our understanding of the relationship between the two conditions remains limited. In this review we provide a synthesis of available evidence, focussing on epidemiology, the potential pathogenesis, and treatment implications of cognitive decline in heart failure. Most evidence available relates to heart failure with reduced ejection fraction and the syndromes of chronic cognitive decline or dementia. These conditions are only part of a complex heart failure-cognition paradigm. Associations between cognition and heart failure with preserved ejection fraction and between acute delirium and heart failure also seem evident and where data are available we will discuss these syndromes. Many questions remain unanswered regarding heart failure and cognition. Much of the observational evidence on the association is confounded by study design, comorbidity and insensitive cognitive assessment tools. If a causal link exists, there are several potential pathophysiological explanations. Plausible underlying mechanisms relating to cerebral hypoperfusion or occult cerebrovascular disease have been described and it seems likely that these may coexist and exert synergistic effects. Despite the prevalence of the two conditions, when cognitive impairment coexists with heart failure there is no specific guidance on treatment. Institution of evidence-based heart failure therapies that reduce mortality and hospitalisations seems intuitive and there is no signal that these interventions have an adverse effect on cognition. However, cognitive impairment will present a further barrier to the often complex medication self-management that is required in contemporary heart failure treatment

Construction of defining relators for finite groups

AbstractGiven a faithful representation of a group G of order up to 104, we describe an algorithm, based on the notion of the graph of G, for constructing a concise presentation for G. This technique may be generalized to give a semialgorithm which is usually successful in finding presentations for groups of order up to 106

1948, March 5 - News Clipping

News clipping detailing the life of Edna Webb Darwinhttps://digitalcommons.gardner-webb.edu/fay-webb-gardner-edna-webb-darwin-family/1001/thumbnail.jp