4,715 research outputs found
Note from Mrs B.R. Ingram to Dorothy F. Steele
No full textLetter regarding her son's response to Dorothy F. Steele as a his teacher
MANOVA modelling of a chiropractic longitudinal study using multiple imputation
No full textThe purpose of this report is to present the detailed statistical analysis of a randomised, placebo-controlled trial comparing two different treatment modalities to an intervention of no known benefit for people with acute or subacute thoracic spine pain.
The therapy arms consist of Spinal Manipulative Therapy (SMT) and Graston Technique (GT) and the placebo is a non-functional ultrasound. A placebo group was utilised because at present there are no proven treatments for non-specific thoracic pain. This trial is registered with the Australia and New Zealand Clinical Trials Registry. Ethics approval has been granted by Murdoch University Human Research and Ethics Committee, number 2007/274.
The aim of this three arm trial was to test the efficacy of SMT and GT as independent modalities compared to detuned ultrasound for the outcomes of pain and disability. The latter were measured using the Visual Analogue Scale (VAS) and a modified Oswestry Back Pain Disability Index. The study was conducted at the Murdoch University Chiropractic student clinic in Perth, Australia, and the protocol published in Crothers et al (2008).
In this report, Section 2 provides an initial exploratory analysis of the data, Section 3 outlines the statistical models used in the final analysis, Section 4 defines these models in mathematical terms, Section 5 discusses the management of missing values via multiple imputation and Section 6 presents the results of the statistical modelling and hypothesis tests. The clinical study will be published in full elsewhere
Introduction: haunting images
No full textPublished online: 16 Jul 2008Benjamin R. Smith and Richard Voke
Implementing Symbolic Models for Value Passing in TwoTowers
No full textWe describe an extension of TwoTowers, a software tool for the functional and performance analysis of concurrent and distributed systems modeled in EMPA, in which a symbolic model based support for data driven computations is implemented and we recall its advantages both from the expressiveness and the analysis standpoint
Stylogaster westwoodi Smith 1967
No full textStylogaster westwoodi Smith, 1967 Figs 2–10 Stylogaster westwoodi Smith, 1967: 64–66 (Type locality: Tanzania: “Tanganyika: Amani”). Literature: Hinton (1981), Smith (1967), Smith & Cunninghamvan Someren (1985). Material examined: KENYA: Eastern Province: 2♂ Kibwesi forest, 2°27.90'S 37°54.91'E, 13–20 xi.1999, R. Copeland, Malaise trap; 1♂ 1♀ same, except 27.xi–4 xii.1999. Western Province: 1♂, Kakamega Forest, 0°14.13'S 34°51.87'E, 9–16.iv.2000, R. Copeland, Malaise trap; 1♀ same, except 19–26.vi.2000; 1♂ “Wika”, 4.ix.1987, R. Copeland; 1♀ Magunga, 18.ix.1987, R. Copeland. Coast: 2♀ Muhaka Forest, 4°19.47'S 39°31.45'E, 1–6.ix.1999, R. Copeland, Malaise trap; 1♀ same, except 6–13.i.2000; 1♀ ArabukoSokoke forest, 3°25.21'S 39°53.81'E, 3–10.iv.1999, R. Copeland, Malaise trap; 1♀ same, except 26.v–2.vi.2000 (all NMKE & JHS); 1♂ Nairobi, Karura forest, 1°14'S 36°50'E, 5000 ft, 15.i.1972, C.F. Huggins (BMNH). MALAWI: 1♂ Ntchisi Forest Reserve, SE1334 Ac, 1500 m, 3–4 xii.1980, J.G.H. Londt & B.R. Stuckenberg, montane forest woodland (NMSA); 1♀ Kasungu National Park, Lifupa Camp, SE 1333 Aa, 9–10 xii.1980, 1000 m, J.G.H. Londt & B.R. Stuckenberg (NMSA). SOUTH AFRICA: Limpopo: 1♂ Kruger National Park, Pafuri, 22°21'S 31°17'E, 1–13.ii.1980, L. Braack, Malaise trap (NMSA); 1♂ Lekqalameetse Reserve, 24°12'S 30°20'E, 25–31.iii.2001, F. Koch (ZMHB). TANZANIA: 1♀ Mlingano, iv.1952, J. Shipps (BMNH). Distribution: Widely distributed in the Afrotropics: the Democratic Republic of the Congo, Kenya, Malawi, Nigeria, South Africa, Tanzania and Zimbabwe.Published as part of Stuke, Jens-Hermann, 2012, A revision of Afrotropical species of Stylogaster Macquart (Diptera: Conopidae), with descriptions of twenty-one new species and an identification key, pp. 267 in African Invertebrates 53 (1) on page 350, DOI: 10.5733/afin.053.0118, http://zenodo.org/record/791535
Romeo and Juliet 2.1 : "But Soft, what light through yonder window breaks?”
No full textThe scene in Romeo and Juliet that has come to be called ‘the balcony scene’ (2.1) has had a strange yet meaningful destiny. Though no balcony is ever mentioned in Shakespeare, balconies have appeared everywhere throughout the ages – in the theatre, the cinema, in painting, advertising, cartoons, in both high and low culture. It is a scene with a long and fascinating history, both on and off stage
RANS vs LES CFD for Gas-Fired Combustion Equipment
No full textPaper from the AFRC 2017 conference titled RANS vs LES CFD for Gas-Fired Combustion EquipmentHigh temperature gas-fired furnaces and gas flares are widely used in the chemical and petrochemical industries. The US EPA estimates that approximately 3,200 process heaters are used in the U.S. petroleum refining industry and 1,400 fired heaters are used in the U.S. chemical process industry [1]. NASA/NOAA estimated that in 2012 there were approximately 7,500 gas flares worldwide burning approximately 143 billion cubic meters (BCM) natural gas [2]. Past developments in combustion diagnostics, computational resources and software development have greatly expanded the application of computational fluid dynamics (CFD) tools for combustion analysis in the process industries. Effective use of CFD can help improve combustion efficiency, enhance heat transfer efficiency, reduce pollutant formation, and establish better safety practices. CFD has been used to develop insights into unique combustion phenomena (i.e., turbulent mixing effect on reacting flows), evaluate new and modified equipment design (i.e., improved low-NOx burners), assess operations (i.e., turn-down conditions), guide experimental work (i.e., reduce costs of full scale testing), and calculate pollutant control impacts (i.e., flare burner tip spacing on soot formation). However, not all CFD tools equally simulate all combustion processes accurately. Successful application of CFD requires an understanding of which tools work best for which applications.; This paper will compare Large Eddy Simulations (LES) to Reynolds-averaged Navier-Stokes (RANS) based CFD applied to several combustion applications to illustrate issues to consider when applying CFD to solve industrial problems. This paper will review the basis, strengths and limitations of these two approaches and provide recommendations on when each is most applicable. An LES based CFD tool simulates turbulent reaction chemistry coupled with radiative transport in buoyancy driven flames (i.e., gas flares) and the impact large flames have on surrounding objects (i.e., wind fence, process equipment, etc.). Validation work comparing LES based CFD simulations to RANS based simulations of a multi-point ground flare test will be shown to illustrate each approach for this application. Recent LES based CFD analysis of transient burner operation will also be discussed. Results of this work will be used to review and discuss how CFD codes may help assess various risk scenarios including wind, % flame coverage, and thermal fatigue for a given geometry. Several examples will be used to illustrate applications where each technology has worked and failed
Introduction to <i>Stone in Historic Buildings Characterization and Performance</i>
No full textInterest in natural building stone, especially as used in historic buildings, is significant. This is demonstrated by the large number of publications that annually appear on stone, its properties, use, behaviour and treatment, and in the conferences on these subjects that are held in all parts of the world. In 2012 and 2013, the 12th International Congress on the Deterioration and Conservation of Stone (New York, USA), CRYSPOM III – Crystallization in Porous Media (Tróia, Portugal), Natural Stone Research and Heritage Stone Designation (Vienna, Austria), the EGU General Assembly Vienna 2012 Monuments under Threat and the International Conference on Built Heritage 2013: Monitoring Conservation Management (Milan, Italy) were held. Besides the proceedings, which usually result from such conferences, numerous other publications on stone and stone buildings regularly find their way into the public domain. Not least amongst these are a number of Geological Society Special Publications (SP) including SP205 Natural Stone, Weathering Phenomena, Conservation Strategies and Case Studies (Siegesmund et al. 2002), SP271 Building Stone Decay: From Diagnosis to Conservation (Přikryl & Smith 2007), SP331 Limestone in the Built Environment: Present-Day Challenges for the Preservation of the Past (Smith et al. 2010) and SP333 Natural Stone Resources for Historical Monuments (Přikryl & Török 2010). This current volume, SP391, seeks to bring to the attention of the various professionals in the field – geologists, architects, engineers, conservators and conservation scientists – recent work centred on the characterization and performance of this important resource, and its use in historic buildings. This volume has wider relevance, including to those interested in the heritage of ston
Load–velocity relationship 1RM predictions: A comparison of Smith machine and free-weight exercise
No full textThis study aimed to determine differences in the validity and reliability of 1RM predictions made using load–velocity relationships in Smith machine and free-weight exercise. Twenty well-trained males attended six sessions, comprising the Smith machine and free-weight squat, bench press, prone row and overhead press. Load-velocity relationship-based 1RM predictions were performed using minimal velocity threshold (1RMMVT), load at zero velocity (1RMLD0) and force-velocity (1RMFV) methods, with 5- or 7-loads. Measured 1RM did not differ from 1RMMVT or 1RMLD0 for any of the Smith machine exercises, while it was higher than 1RMFV for all exercises except the prone row. For the free-weight variations all 1RM predictions differed from measured 1RM for the squat and overhead press, while measured and predicted 1RM did not differ in the bench press and prone row. No differences were observed between 7-and 5-load predictions. 1RMMVT was the most reliable and valid of the methods. Smith machine exercises resulted in more reliable predictions than free weight exercises. 1RMMVT provides valid and reliable predictions for the Smith machine, squat, bench press, prone row and overhead press and free-weight bench press and prone row. Practitioners must be aware of the poor validity of free-weight squat and overhead press predictions
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