Sarah Mitchell

ORCID: 0000-0003-3603-2883
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About
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Research Areas
  • Australian History and Society
  • Icing and De-icing Technologies
  • Metallurgical Processes and Thermodynamics
  • Lattice Boltzmann Simulation Studies
  • Thermal Analysis in Power Transmission
  • Thermal Radiation and Cooling Technologies
  • Religion, Society, and Development
  • Solidification and crystal growth phenomena
  • Fluid Dynamics and Turbulent Flows
  • Scottish History and National Identity
  • Differential Equations and Numerical Methods
  • Aluminum Alloy Microstructure Properties
  • Hip and Femur Fractures
  • Solar Thermal and Photovoltaic Systems
  • Advanced Mathematical Modeling in Engineering
  • Metallurgy and Material Forming
  • Balance, Gait, and Falls Prevention
  • Advanced Thermodynamics and Statistical Mechanics
  • nanoparticles nucleation surface interactions
  • Nanofluid Flow and Heat Transfer
  • Material Dynamics and Properties
  • Cardiovascular and exercise physiology
  • American Environmental and Regional History
  • Cerebral Palsy and Movement Disorders
  • Hydraulic Fracturing and Reservoir Analysis

University of Limerick
2013-2023

Minnesota State University, Mankato
2023

Raven (United States)
2023

Academy of Christian Humanism University
2023

Freie Universität Berlin
2023

Utah State University
2023

Auburn University
2023

La Trobe University
2023

Emerald Group Publishing (United Kingdom)
2023

University of Ibadan
2023

The primary purpose of this study was to investigate the accuracy acti vPAL physical activity monitor in measuring step number and cadence older adults. Two pedometers (New-Lifestyles Digi-Walker SW-200 New-Lifestyles NL-2000) used clinical practice count steps were simultaneously evaluated. Observation criterion measure. Twenty-one participants (65-87 yr old) recruited from community-based exercise classes walked on a treadmill at 5 speeds (0.67, 0.90, 1.12, 1.33, 1.56 m/s) outdoors 3...

10.1123/japa.16.2.201 article EN Journal of Aging and Physical Activity 2008-04-01

Abstract In this paper we undertake a quantitative analysis of the dynamic process by which ice underneath dry porous debris layer melts. We show that incorporation debris-layer airflow into theoretical model glacial melting can capture empirically observed features so-called Østrem curve (a plot melt rate as function depth). Specifically, turning point in be caused two distinct mechanisms: increase proportion is debris-covered and/or reduction evaporative heat flux thickens. This second...

10.3189/2015jog14j235 article EN Journal of Glaciology 2015-01-01

<h3>Objectives</h3> The genetic aetiology of osteoarthritis has not yet been elucidated. To enable a well-powered genome-wide association study (GWAS) for osteoarthritis, the authors have formed arcOGEN Consortium, UK-wide collaborative effort aiming to scan over 7500 cases in two-stage scan. Here report findings stage 1 interim analysis. <h3>Methods</h3> performed knee and hip 3177 4894 population-based controls from UK. Replication promising signals was carried out silico five further...

10.1136/ard.2010.141473 article EN Annals of the Rheumatic Diseases 2010-12-21

The work in this paper concerns the study of conventional and refined heat balance integral methods for a number phase change problems. These include standard test problems, both with one two changes, which have exact solutions that enable us to accuracy approximate solutions. We also consider situations where no analytical solution is available compare these numerical It popular use quadratic profile as an approximation temperature, but we show cubic profile, seldom considered literature,...

10.1137/080733036 article EN SIAM Review 2010-01-01

A recently derived numerical algorithm for one-dimensional one-phase Stefan problems is extended the purpose of two-phase moving boundary in which second phase first appears only after a finite delay time; this can occur if change caused by heat-flux condition. In tandem with Keller box finite-difference scheme, so-called immobilization method used. An important component work use variable transformations that must be built into to resolve boundary-condition discontinuity associated onset...

10.1016/j.cam.2014.01.003 article EN publisher-specific-oa Journal of Computational and Applied Mathematics 2014-01-17

Deep energy retrofit (DER) of the existing building stock is a meaningful strategy to reduce fossil fuel consumption and CO2 emissions. However, investment volumes required undertake DER are enormous. In Europe, cumulative demand for estimated at close 1000 billion EUR until 2050. Public expenditures political measures can help stimulate guide DER, but substantial private investments achieve significant results. this paper, we analyze economic financial implications renovating an office...

10.1007/s12053-018-9707-8 article EN cc-by Energy Efficiency 2018-07-21

Objective: To determine whether systematic progressive high-intensity quadriceps training increases leg extensor power and reduces disability in patients rehabilitating after proximal femoral fracture. Design: Open parallel group randomized controlled trial comparing the addition of six weeks (40 patients) with standard physiotherapy alone patients). The exercised twice weekly, sets 12 repetitions knee extension (both legs), progressing up to 80% their one-repetition maximum. Setting:...

10.1191/026921501676849095 article EN Clinical Rehabilitation 2001-06-01

In heart failure, reduced physical activity level can adversely affect and psychosocial functioning. No previous failure research has compared effects of home hospital-based exercise training upon level, or objectively assessed their long-term activity. This study used an activPAL™ monitor to examine immediate aerobic level. Randomized controlled trial. Sixty patients with (mean age 66 years; NYHA class II/III; 51 male/9 female) were randomized training, hospital control. Both programmes...

10.1177/1741826710389389 article EN European Journal of Cardiovascular Prevention & Rehabilitation 2011-02-18

10.1016/j.cam.2012.05.011 article EN publisher-specific-oa Journal of Computational and Applied Mathematics 2012-05-27

This paper presents a novel asymptotic framework to obtain detailed solutions describing the propagation of hydraulic fractures in an elastic material. The problem consists system nonlinear integro-differential equations and free boundary problem. combination local nonlocal effects leads transitions on small scale near crack tip, which control behavior across whole fracture profile. These depend upon dominant physical process(es) are identified by simultaneously scaling associated parameters...

10.1115/1.2200653 article EN Journal of Applied Mechanics 2006-03-13

10.1007/s00231-010-0637-z article EN Heat and Mass Transfer 2010-07-07

10.1016/j.ijheatmasstransfer.2013.02.070 article EN International Journal of Heat and Mass Transfer 2013-04-09

Folate metabolism in malaria parasites is a long-standing, clinical target for chemotherapy and prophylaxis. However, despite determination of the complete genome sequence lethal species Plasmodium falciparum, pathway de novo folate biosynthesis remains incomplete, as no candidate gene dihydroneopterin aldolase (DHNA) could be identified. This enzyme catalyses third step well-characterized plants, bacteria, those eukaryotic microorganisms capable synthesizing their own folate. Utilizing...

10.1111/j.1365-2958.2007.06073.x article EN other-oa Molecular Microbiology 2007-12-18

In this paper, the heat balance integral method is applied to a simple one-dimensional ablation problem. Previous authors have provided solutions that give good approximations over short time scale; we attempt provide solution valid large scale, both before and after begins. We motivation for choice of quartic approximating function n = 4 compare our results with different polynomial numerical solutions. It shown lower values degree better approximation temperature profile in preablation...

10.2514/1.31755 article EN Journal of Thermophysics and Heat Transfer 2008-06-26

10.1016/j.apm.2011.02.049 article EN Applied Mathematical Modelling 2011-03-07

We employ the Heat Balance Integral Method (HBIM) to solve a number of thermal and phase change problems which occur in multitude industrial contexts. As part our analysis, we propose new error measure for HBIM that combines least-squares with boundary immobilisation method. describe how determine this three basic show it can be used an optimal heat balance formulation. then HBIM, measure, may approximate solution aircraft deicing problem. Finally apply method two industrially important problems.

10.1155/2012/187902 article EN cc-by International Journal of Differential Equations 2012-01-01
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