Detailed design of a quiet high flow fan

A single stage fan was designed to demonstrate the noise abatement properties of near-sonic inlet flow and long-chord stator vanes for the reduction of both upstream and downstream propagated fan source noise. It is designed to produce a pressure ratio of 1.653:1 with an adiabatic efficiency of 83.9%. The fan has a 508 mm inlet diameter with a hub/tip ratio of 0.426 and a design tip speed of 533.4 m/sec. The design inlet specific flow rate is 219.71 kg/sec sq m and there are 10 tandem stator vanes with a combined aspect ratio of 0.54

Nutritional status of children with Wilms’ tumour on admission to a South African hospital and its influence on outcome

BackgroundIn developing countries up to 77% of children with cancer have been shown to be malnourished on admission. High rates of malnutrition occur due to factors such as poverty and advanced disease. Weight can be an inaccurate parameter for nutritional assessment of children with solid tumours as it is influenced by tumour mass. This study aimed to assess the prevalence of malnutrition amongst children with Wilms tumour (WT), the level of nutritional support received on admission and the influence of nutritional status on outcome.MethodsSeventy‐six children diagnosed with WT and admitted to Inkosi Albert Luthuli Central Hospital between 2004 and 2012 were studied prospectively. Nutritional assessment was conducted using weight, height, mid‐upper arm circumference (MUAC) and triceps skinfold thickness (TSFT) prior to initiating treatment. Outcome was determined 2 years after admission. Time until commencement of nutritional resuscitation and nature, thereof, were recorded.ResultsStunting and wasting was evident in 12% and 15% of patients, respectively. The prevalence of malnutrition was 66% when MUAC, TSFT and albumin were used. Malnutrition was not a predictor of poor outcome and did not predict advanced disease. The majority of patients (84%) received nutritional resuscitation within 2 weeks of admission.ConclusionsWhen classifying nutritional status in children with WT, the utilisation of weight and height in isolation can lead to an underestimation of the prevalence of malnutrition. Nutritional assessment of children with WT should also include MUAC and TSFT. Early aggressive nutritional resuscitation is recommended.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/137198/1/pbc26382.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/137198/2/pbc26382_am.pd

Elliptic curves of large rank and small conductor

For r=6,7,...,11 we find an elliptic curve E/Q of rank at least r and the smallest conductor known, improving on the previous records by factors ranging from 1.0136 (for r=6) to over 100 (for r=10 and r=11). We describe our search methods, and tabulate, for each r=5,6,...,11, the five curves of lowest conductor, and (except for r=11) also the five of lowest absolute discriminant, that we found.Comment: 16 pages, including tables and one .eps figure; to appear in the Proceedings of ANTS-6 (June 2004, Burlington, VT). Revised somewhat after comments by J.Silverman on the previous draft, and again to get the correct page break

‘Not easily put into a box’: constructing professional identity

Researching the interplay between social work students' personal and professional identities, I found that, in talking about becoming professionals, students drew on a wide range of discourses. Three common usages of the term ‘professional identity’ are explored here: it can be thought of in relation to desired traits; it can also be used in a collective sense to convey the ‘identity of the profession’. Taking a more subjective approach, professional identity can be regarded as a process in which each individual comes to have a sense of themselves as a social worker. I argue that the variations in students' talk reflect a wide range of cultural understandings that are prevalent within the social work community and society in general, and conclude that professional identity is more complicated than adopting certain traits or values, or even demonstrating competence. The different meanings of professional identity all have something to offer, providing resources for students as they construct themselves as social workers. This is important for social work education because it acknowledges the dynamic nature of professional identity, highlights the difficult identity work which each student must undertake, and prompts us to consider how this process might best be supported

Exercise mode in heart failure: A systematic review and meta-analysis.

Background: Optimising exercise prescription in heart failure (HF) with a preserved (HFpEF) or reduced (HFrEF) ejection fraction is clinically important. As such, the aim of this meta-analysis was to compare traditional moderate intensity training (MIT) against combined aerobic and resistance training (CT) and high intensity interval training (HIIT) for improving aerobic capacity (VO2), as well as other clinically relevant parameters. Methods: A comprehensive systematic search was performed to identify randomised controlled trials published between 1990 and May 2021. Research trials reporting the effects of MIT against CT or HIIT on peak VO2 in HFpEF or HFrEF were considered. Left-ventricular ejection fraction (LVEF) and various markers of diastolic function were also analysed. Results: 17 studies were included in the final analysis, 4 of which compared MIT against CT and 13 compared MIT against HIIT. There were no significant differences between MIT and CT for peak VO2 (WMD:0.521ml·min-1·kg-1, [95% CI] =-0.7-1.8, Pfixed=0.412) or LVEF (WMD:-1.129 %, [95%CI] =-3.8-1.5,Pfixed=0.408). However, HIIT was significantly more effective than MIT at improving peak VO2 (WMD:1.62 ml·min-1·kg-1, [95%CI] =0.6-2.6,Prandom=0.002) and LVEF (WMD:3.24 %, [95%CI] =1.7-4.8,Prandom<0.001) in HF patients. When dichotomized by HF phenotype, HIIT remained significantly more effective than MIT in all analyses except for peak VO2 in HFpEF. Conclusions: HIIT is significantly more effective than MIT for improving peak VO2 and LVEF in HF patients. With the exception of peak VO2 in HFpEF, these findings remain consistent in both phenotypes. Separately, there is no difference in peak VO2 and LVEF change following MIT or CT, suggesting the addition of resistance exercise does not inhibit aerobic adaptations in HF

Exercise Mode in Heart Failure: A Systematic Review and Meta-Analysis

Background Optimising exercise prescription in heart failure (HF) with a preserved (HFpEF) or reduced (HFrEF) ejection fraction is clinically important. As such, the aim of this meta-analysis was to compare traditional moderate intensity training (MIT) against combined aerobic and resistance training (CT) and high-intensity interval training (HIIT) for improving aerobic capacity (VO 2 ), as well as other clinically relevant parameters. Methods A comprehensive systematic search was performed to identify randomised controlled trials published between 1990 and May 2021. Research trials reporting the effects of MIT against CT or HIIT on peak VO 2 in HFpEF or HFrEF were considered. Left-ventricular ejection fraction (LVEF) and various markers of diastolic function were also analysed. Results Seventeen studies were included in the final analysis, 4 of which compared MIT against CT and 13 compared MIT against HIIT. There were no significant differences between MIT and CT for peak VO 2 (weighted mean difference [WMD]: 0.521 ml min ⁻¹ kg ⁻¹ , [95% CI] = − 0.7 to 1.8, P fixed = 0.412) or LVEF (WMD: − 1.129%, [95% CI] = − 3.8 to 1.5, P fixed = 0.408). However, HIIT was significantly more effective than MIT at improving peak VO 2 (WMD: 1.62 ml min ⁻¹ kg ⁻¹ , [95% CI] = 0.6–2.6, P random = 0.002) and LVEF (WMD: 3.24%, [95% CI] = 1.7–4.8, P random < 0.001) in HF patients. When dichotomized by HF phenotype, HIIT remained significantly more effective than MIT in all analyses except for peak VO 2 in HFpEF. Conclusions HIIT is significantly more effective than MIT for improving peak VO 2 and LVEF in HF patients. With the exception of peak VO 2 in HFpEF, these findings remain consistent in both phenotypes. Separately, there is no difference in peak VO 2 and LVEF change following MIT or CT, suggesting that the addition of resistance exercise does not inhibit aerobic adaptations in HF

Elliptic Curves over Real Quadratic Fields are Modular

We prove that all elliptic curves defined over real quadratic fields are modular.Comment: 38 pages. Magma scripts available as ancillary files with this arXiv versio

Can the appropriateness of eye care be measured through cross-sectional retrospective patient record review in eye care practices in Australia? the icaretrack feasibility study

© Author(s) (or their employer(s)) 2018. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. Objectives The CareTrack study found that a wide range of appropriateness of care (ie, care in line with evidence-based or consensus-based guidelines) was delivered across many health conditions in Australia. This study therefore aimed to demonstrate the feasibility of using the CareTrack method (a retrospective onsite record review) to measure the appropriateness of eye care delivery. Design Cross-sectional feasibility study. Setting and participants Two hundred and thirteen patient records randomly selected from eight optometry and ophthalmology practices in Australia, selected through a combination of convenience and maximum variation sampling. Methods Retrospective record review designed to assess the alignment between eye care delivered and 93 clinical indicators (Delphi method involving 11 experts) extracted from evidence-based clinical practice guidelines. Primary outcome measure Number of eligible patient records, sampling rates and data collection time. This feasibility study also tested the ability of 93 clinical indicators to measure percentage appropriate eye care for preventative, glaucoma and diabetic eye care. A secondary outcome was the percentage of practitioner-patient encounters at which appropriate eye care was received. Results A median of 20 records (range 9 to 63) per practice were reviewed. Data collection time ranged from 3 to 5.5 hours (median 3.5). The most effective sampling strategy involved random letter generation followed by sequential sampling. The appropriateness of care was 69% (95% CI 67% to 70%) for preventative eye care, 60% (95% CI 56% to 58%) for glaucoma and 63% (95% CI 57% to 69%) for diabetic eye care. Conclusions Appropriateness of eye care can be measured effectively using retrospective record review of eye care practices and consensus-based care indicators