60 research outputs found

    Food and Nutrition Practices and Education Needs in Florida\u27s Adult Family Care Homes

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    A statewide survey was carried out to determine food and nutrition practices and education needs of Florida\u27s adult family care homes (AFCHs). The 30-item survey included questions on food and nutrition education, supplement use, and menu planning. Infrequent use of menus and nutrition supplements was reported. A strong need was indicated for education on special diets, menu planning, pureed food preparation, and the nutritional needs of the elderly. Extension programming to meet these educational needs may result in improved nutritional wellbeing of frail older adults in care

    Evaluation of a Cooperative Extension Curriculum in Florida: Food Modification for Special Needs

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    State and national surveys of adult family care homes identified a strong need for education on texture-modified food preparation and the nutritional needs of older adults. An Extension curriculum, Food Modification for Special Needs, was developed to provide an overview of chewing and swallowing problems, food texture, pureed food preparation, and the nutritional needs of older adults as well as hands-on skill development. An evaluation demonstrated that use of the curriculum resulted in significant impacts among workshop participants on perceived knowledge and skills gained and implementation of skills learned. Further in-state and national dissemination of the Food Modification for Special Needs curriculum is required

    Measuring nickel masses in Type Ia supernovae using cobalt emission in nebular phase spectra

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    The light curves of Type Ia supernovae (SNe Ia) are powered by the radioactive decay of 56^{56}Ni to 56^{56}Co at early times, and the decay of 56^{56}Co to 56^{56}Fe from ~60 days after explosion. We examine the evolution of the [Co III] 5892 A emission complex during the nebular phase for SNe Ia with multiple nebular spectra and show that the line flux follows the square of the mass of 56^{56}Co as a function of time. This result indicates both efficient local energy deposition from positrons produced in 56^{56}Co decay, and long-term stability of the ionization state of the nebula. We compile 77 nebular spectra of 25 SN Ia from the literature and present 17 new nebular spectra of 7 SNe Ia, including SN2014J. From these we measure the flux in the [Co III] 5892 A line and remove its well-behaved time dependence to infer the initial mass of 56^{56}Ni (MNiM_{Ni}) produced in the explosion. We then examine 56^{56}Ni yields for different SN Ia ejected masses (MejM_{ej} - calculated using the relation between light curve width and ejected mass) and find the 56^{56}Ni masses of SNe Ia fall into two regimes: for narrow light curves (low stretch s~0.7-0.9), MNiM_{Ni} is clustered near MNiM_{Ni} ~ 0.4MM_\odot and shows a shallow increase as MejM_{ej} increases from ~1-1.4MM_\odot; at high stretch, MejM_{ej} clusters at the Chandrasekhar mass (1.4MM_\odot) while MNiM_{Ni} spans a broad range from 0.6-1.2MM_\odot. This could constitute evidence for two distinct SN Ia explosion mechanisms.Comment: 16 pages, 12 figures (main text), plus data tables in appendix. Spectra released on WISeREP. Submitted to MNRAS, comments welcom

    SN 2012ec: Mass of the progenitor from PESSTO follow-up of the photospheric phase

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    We present the results of a photometric and spectroscopic monitoring campaign of SN 2012ec, which exploded in the spiral galaxy NGC 1084, during the photospheric phase. The photometric light curve exhibits a plateau with luminosity L = 0.9 × 1042 erg s−1 and duration ∼90 d, which is somewhat shorter than standard Type II-P supernovae (SNe). We estimate the nickel mass M(56Ni) = 0.040 ± 0.015 M from the luminosity at the beginning of the radioactive tail of the light curve. The explosion parameters of SN 2012ec were estimated from the comparison of the bolometric light curve and the observed temperature and velocity evolution of the ejecta with predictions from hydrodynamical models. We derived an envelope mass of 12.6 M, an initial progenitor radius of 1.6 × 1013 cm and an explosion energy of 1.2 foe. These estimates agree with an independent study of the progenitor star identified in pre-explosion images, for which an initial mass of M = 14−22 M was determined. We have applied the same analysis to two other Type II-P SNe (SNe 2012aw and 2012A), and carried out a comparison with the properties of SN 2012ec derived in this paper. We find a reasonable agreement between the masses of the progenitors obtained from pre-explosion images and masses derived from hydrodynamical models. We estimate the distance to SN 2012ec with the standardized candle method (SCM) and compare it with other estimates based on other primary and secondary indicators. SNe 2012A, 2012aw and 2012ec all follow the standard relations for the SCM for the use of Type II-P SNe as distance indicators

    SN 2009ip at late times - an interacting transient at+2 years

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    We present photometric and spectroscopic observations of the interacting transient SN 2009ip taken during the 2013 and 2014 observing seasons. We characterize the photometric evolution as a steady and smooth decline in all bands, with a decline rate that is slower than expected for a solely Co-56-powered supernova at late phases. No further outbursts or eruptions were seen over a two year period from 2012 December until 2014 December. SN 2009ip remains brighter than its historic minimum from pre-discovery images. Spectroscopically, SN 2009ip continues to be dominated by strong, narrow (less than or similar to 2000 km s(-1)) emission lines of H, He, Ca, and Fe. While we make tenuous detections of [Fe II] lambda 7155 and [O I] lambda lambda 6300, 6364 lines at the end of 2013 June and the start of 2013 October, respectively, we see no strong broad nebular emission lines that could point to a core-collapse origin. In general, the lines appear relatively symmetric, with the exception of our final spectrum in 2014 May, when we observe the appearance of a redshifted shoulder of emission at +550 km s(-1). The lines are not blueshifted, and we see no significant near-or mid-infrared excess. From the spectroscopic and photometric evolution of SN 2009ip until 820 d after the start of the 2012a event, we still see no conclusive evidence for core-collapse, although whether any such signs could be masked by ongoing interaction is unclear

    VizieR Online Data Catalog: PTF12os and iPTF13bvn spectra and light curves (Fremling+, 2016)

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    Photometric and spectroscopic datasets of PTF12os and iPTF13bvn. Our dataset on PTF12os spans from approximately 8.5 days to 215 days past the SN explosion and it contains optical photometry and spectra. Our data on iPTF13bvn spans from approximately 0.6 to 380 days. The dataset on iPTF13bvn contains optical photometry and optical/infrared spectroscopy. (7 data files)

    Baseline characteristics of patients with heart failure and preserved ejection fraction in the PARAGON-HF trial

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    Background: To describe the baseline characteristics of patients with heart failure and preserved left ventricular ejection fraction enrolled in the PARAGON-HF trial (Prospective Comparison of Angiotensin Receptor Neprilysin Inhibitor With Angiotensin Receptor Blocker Global Outcomes in HFpEF) comparing sacubitril/valsartan to valsartan in reducing morbidity and mortality. Methods and Results: We report key demographic, clinical, and laboratory findings, and baseline therapies, of 4822 patients randomized in PARAGON-HF, grouped by factors that influence criteria for study inclusion. We further compared baseline characteristics of patients enrolled in PARAGON-HF with those patients enrolled in other recent trials of heart failure with preserved ejection fraction (HFpEF). Among patients enrolled from various regions (16% Asia-Pacific, 37% Central Europe, 7% Latin America, 12% North America, 28% Western Europe), the mean age of patients enrolled in PARAGON-HF was 72.7±8.4 years, 52% of patients were female, and mean left ventricular ejection fraction was 57.5%, similar to other trials of HFpEF. Most patients were in New York Heart Association class II, and 38% had ≥1 hospitalizations for heart failure within the previous 9 months. Diabetes mellitus (43%) and chronic kidney disease (47%) were more prevalent than in previous trials of HFpEF. Many patients were prescribed angiotensin-converting enzyme inhibitors or angiotensin receptor blockers (85%), β-blockers (80%), calcium channel blockers (36%), and mineralocorticoid receptor antagonists (24%). As specified in the protocol, virtually all patients were on diuretics, had elevated plasma concentrations of N-terminal pro-B-type natriuretic peptide (median, 911 pg/mL; interquartile range, 464–1610), and structural heart disease. Conclusions: PARAGON-HF represents a contemporary group of patients with HFpEF with similar age and sex distribution compared with prior HFpEF trials but higher prevalence of comorbidities. These findings provide insights into the impact of inclusion criteria on, and regional variation in, HFpEF patient characteristics. Clinical Trial Registration: URL: https://www.clinicaltrials.gov. Unique identifier: NCT01920711

    Ejecta Evolution Following a Planned Impact into an Asteroid: The First Five Weeks

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    The impact of the DART spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos' orbit substantially, largely from the ejection of material. We present results from twelve Earth-based facilities involved in a world-wide campaign to monitor the brightness and morphology of the ejecta in the first 35 days after impact. After an initial brightening of ~1.4 magnitudes, we find consistent dimming rates of 0.11-0.12 magnitudes/day in the first week, and 0.08-0.09 magnitudes/day over the entire study period. The system returned to its pre-impact brightness 24.3-25.3 days after impact through the primary ejecta tail remained. The dimming paused briefly eight days after impact, near in time to the appearance of the second tail. This was likely due to a secondary release of material after re-impact of a boulder released in the initial impact, through movement of the primary ejecta through the aperture likely played a role.Comment: 16 pages, 5 Figures, accepted in the Astrophysical Journal Letters (ApJL) on October 16, 202

    Type Ibn Supernovae Show Photometric Homogeneity and Spectral Diversity at Maximum Light

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