Reply from Parsons <i>et al</i>

Parsons, Elizabeth; Bole, Barbara; Hall, D.; Thomas, Walter

doi:10.1111/j.1365-2818.1975.tb03998.x

Cited by 48 publications

(70 citation statements)

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“…• and featuring the beam response pattern characteristic of PAPER dipole elements (Parsons et al 2008;Pober et al 2012). The PAPER beam response pattern is illustrated in the leftmost panel of Figure 7.…”

Section: Methodsmentioning

confidence: 99%

Optimized Beam Sculpting With Generalized Fringe-Rate Filters

Parsons

Liu

Ali

et al. 2016

ApJ

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We generalize the technique of fringe-rate filtering, whereby visibilities measured by a radio interferometer are re-weighted according to their temporal variation. As the Earth rotates, radio sources traverse through an interferometer's fringe pattern at rates that depend on their position on the sky. Capitalizing on this geometric interpretation of fringe rates, we employ time-domain convolution kernels to enact fringe-rate filters that sculpt the effective primary beam of antennas in an interferometer. As we show, beam sculpting through fringe-rate filtering can be used to optimize measurements for a variety of applications, including mapmaking, minimizing polarization leakage, suppressing instrumental systematics, and enhancing the sensitivity of power-spectrum measurements. We show that fringe-rate filtering arises naturally in minimum variance treatments of many of these problems, enabling optimal visibility-based approaches to analyses of interferometric data that avoid systematics potentially introduced by traditional approaches such as imaging. Our techniques have recently been demonstrated in Ali et al. (2015), where new upper limits were placed on the 21 cm power spectrum from reionization, showcasing the ability of fringe-rate filtering to successfully boost sensitivity and reduce the impact of systematics in deep observations.

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Section: Methodsmentioning

confidence: 99%

Optimized Beam Sculpting With Generalized Fringe-Rate Filters

Parsons

Liu

Ali

et al. 2016

ApJ

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“…Both the lack of an optical afterglow and analysis of the BAT spectrum suggested that the source might lie at high redshifts (Markwardt et al 2008;Xiao & Schaefer 2011), but constraints on the X-ray spectrum precluded a high redshift fit to the data (Parsons et al 2008). Association with the known, bright optical source would suggest a lower redshift for the burst, but it was not clear whether this was the host galaxy or a star in chance alignment.…”

Section: Initial Observationsmentioning

confidence: 99%

“…The final enhanced XRT position, with uncertainty 1. ′′ 5, was 06h 48m 58.03s +50 44 07.7 (J2000), coincident with the optical source (Parsons et al 2008). The Galactic longitude and latitude (l =165.369, b =20.301) correspond to a sight-line with moderate dust extinction (AV =0.25) from our own galaxy (Schlafly & Finkbeiner 2011).…”

Section: Initial Observationsmentioning

confidence: 99%

GRB 080517: a local, low-luminosity gamma-ray burst in a dusty galaxy at z = 0.09

Stanway¹,

Levan²,

Tanvir³

et al. 2014

Monthly Notices of the Royal Astronomical Society

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We present an analysis of the photometry and spectroscopy of the host galaxy of Swift-detected GRB 080517. From our optical spectroscopy, we identify a redshift of z = 0.089 ± 0.003, based on strong emission lines, making this a rare example of a very local, low luminosity, long gamma ray burst. The galaxy is detected in the radio with a flux density of S 4.5 GHz =0.22±0.04 mJy -one of relatively few known GRB hosts with a securely measured radio flux. Both optical emission lines and a strong detection at 22µm suggest that the host galaxy is forming stars rapidly, with an inferred star formation rate ∼ 16 M ⊙ yr −1 and a high dust obscuration (E(B − V ) > 1, based on sight-lines to the nebular emission regions). The presence of a companion galaxy within a projected distance of 25 kpc, and almost identical in redshift, suggests that star formation may have been triggered by galaxy-galaxy interaction. However, fitting of the remarkably flat spectral energy distribution from the ultraviolet through to the infrared suggests that an older, 500 Myr post-starburst stellar population is present along with the ongoing star formation. We conclude that the host galaxy of GRB 080517 is a valuable addition to the still very small sample of well-studied local gamma-ray burst hosts.

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“…There was a significant improvement in the number of correct scores for BMI (step 1) (58% vs 83 % p = 0.00 (two tailed paired t-test) and weight loss (step 2) (52 % vs 84 % p = 0.00 (two tailed paired t-test), with a 61 % increase in correct total 'MUST' score (p = 0.00, two tailed paired t-test). Malnutrition prevalence increased from 26 % to 36 % (14% medium risk, 22 % high risk); dietetic referrals did not increase during this time (7% vs 5 %).Malnutrition prevalence in West Sussex care homes is similar to that seen locally and nationally (2,4) . Inaccurate calculation of 'MUST' underestimated the prevalence of malnutrition similar to that seen when a non-validated tool is used.…”

mentioning

confidence: 53%

“…Malnutrition prevalence in West Sussex care homes is similar to that seen locally and nationally (2,4) . Inaccurate calculation of 'MUST' underestimated the prevalence of malnutrition similar to that seen when a non-validated tool is used.…”

mentioning

confidence: 58%

Tailored training on screening for malnutrition using the ‘Malnutrition Universal Screening Tool’ (‘MUST’) and management plans improves screening accuracy and documentation in care homes in West Sussex

2011

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Malnutrition is a common and costly problem in the UK, with public health expenditure in excess of £13 billion (1) . Malnutrition affects more than 1 in 3 care home residents in the UK (2) . Screening for malnutrition is recommended on admission to care homes and individuals should be monitored and appropriate action taken according to malnutrition risk (3) . Recording and accuracy of screening can be variable, which can compromise care of malnourished individuals.This survey in care homes aimed to review current screening practices, provide training tailored to the care home's needs on 'MUST' and local management plans and monitor the impact.All care plans (n = 546) were reviewed in 20 care homes (75 % nursing care (15 homes), 15 % residential care (3 homes) and 10 % dual registered (2 homes)). Training was provided to each care home, based on their training needs. 4 weeks after training a random selection of care plans were reviewed (55 % of original population (n = 299)). Data were collected on; screening and management plan documentation and screening accuracy.Training significantly improved the documentation of height (72 % vs 90 % p = 0.00 (two tailed paired t-test) and weight (74 % vs 90 % p = 0.00 (two tailed paired t-test). The 'MUST' was present in 25 % more care plans after training. There was a significant improvement in the number of correct scores for BMI (step 1) (58% vs 83 % p = 0.00 (two tailed paired t-test) and weight loss (step 2) (52 % vs 84 % p = 0.00 (two tailed paired t-test), with a 61 % increase in correct total 'MUST' score (p = 0.00, two tailed paired t-test). Malnutrition prevalence increased from 26 % to 36 % (14% medium risk, 22 % high risk); dietetic referrals did not increase during this time (7% vs 5 %).Malnutrition prevalence in West Sussex care homes is similar to that seen locally and nationally (2,4) . Inaccurate calculation of 'MUST' underestimated the prevalence of malnutrition similar to that seen when a non-validated tool is used. Providing training to care homes already using 'MUST' improved documentation and accuracy of screening. The increased dietetic time to provide training on screening and management plans can be offset as care homes are empowered to initiate first line management of malnourished individuals. Further work to assess the efficacy of the management plans is needed with further training to help implementation.

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Reply from Parsons et al

Abstract: We agree with much that Malin has stated in this paper (J. Microsc. 103,79, 1975).

Cited by 48 publications

References 0 publications

Optimized Beam Sculpting With Generalized Fringe-Rate Filters

Optimized Beam Sculpting With Generalized Fringe-Rate Filters

GRB 080517: a local, low-luminosity gamma-ray burst in a dusty galaxy at z = 0.09

Tailored training on screening for malnutrition using the ‘Malnutrition Universal Screening Tool’ (‘MUST’) and management plans improves screening accuracy and documentation in care homes in West Sussex

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