Measurement of vibrations affecting the power transmission seals by Petros Nomikos, Emilia Kozuch, Nick Morris, Ramin Rahmani, Homer Rahnejat

“…Downsizing of transmission boxes and economic pressures in manufacture has gradually led to changed sealing conditions in passenger cars. Radial shaft seals are widely used in power transmission systems to prevent oil leakage from the system. …”
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Thin film tribology of pharmaceutical elastomeric seals by David W. Grimble, Stephanos Theodossiades, Homer Rahnejat, M. Wilby

“…This requirement often conflicts with smooth operation of valves because of poor lubrication of seals. The repercussions of this can be variability in dispensed dose as well as loss of prime and gradual wear of seals. …”
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Development of cold sealing processes for anodized aluminium by Majid Rezai-Kalantary

“…It is shown that: (a) virtually all cold sealing solutions are based on nickel fluoride and operate in a temperature range of I5-60oe for 5-35 minutes and at a pH of 5.0- 6.5; (b) anodized aluminium sealed in the above solution(s) can not be tested for seal quality immediately. …”
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Acoustic risk balancing by marine mammals: anthropogenic noise can influence the foraging decisions by seals' by Gordon Hastie, Paul Lepper, Debbie Russell, Chris McKnight, Ryan Milne, Dave Thompson

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Laser surface texturing of Wankel engine apex seals by Nick Morris, George Hart, Yong Jie Wong, Matthew Simpson, Sebastian Howell-Smith

“…The performance of the texture features is evaluated experimentally, and the results indicate that laser surface texture features can reduce frictional power loss by up to 30% at the apex seal-housing interface.…”
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In-plane and out-of-plane elastodynamics of thin rings and seals by Rob Turnbull, Ramin Rahmani, Homer Rahnejat

“…Thin curved rings used mostly as seals, including in internal combustion engines undergo complex elastodynamic behavior when subjected to a combination of normal radial loading and tangential shear with friction. …”
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Thermohydrodynamics of bidirectional groove dry gas seals with slip flow by H. Su, Ramin Rahmani, Homer Rahnejat

“…Thermo-hydrodynamic behaviour of bidirectional dry gas seals with trapezoidal shaped symmetric grooves is studied. …”
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Measurement and prediction of thermal performance of automotive transmission radial lip seals by Petros Nomikos, Ramin Rahmani, Nick Morris, Homer Rahnejat

“…Excessive exposure to high temperatures can accelerate degradation and aging of elastomeric seals, resulting in increased wear. …”
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An investigation of oil leakage from automotive driveshaft radial lip seals by Petros Nomikos, Ramin Rahmani, Nick Morris, Homer Rahnejat

“…The paper investigates the leakage from two different shaft machining processes: corundum and cubic boron nitride (CBN) grinding. The performance of passenger car transmission sealing system is ascertained with the development and use of a novel detailed representative fully instrumented test rig. …”
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Harbour seals avoid tidal turbine noise: implications for collision risk by Gordon D. Hastie, Deborah J.F. Russell, Paul Lepper, Jim Elliott, Ben Wilson, Steven Benjamins, Dave Thompson

“…There is now a clear need to measure how marine mammals behave in response to actual operating tidal turbines in the long term to learn whether marine mammals and tidal turbines can co-exist safely at the scales currently envisaged for the industry.…”
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Performance evaluation of radial shaft seals of automotive transmission systems [Abstract] by Emilia Kozuch, Petros Nomikos, Nick Morris, Ramin Rahmani, Homer Rahnejat

“…The effective sealing of components in relative motion poses a significant challenge in numerous engineering applications. …”
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Friction in ultra-thin conjunction of valve seals of pressurised metered dose inhalers by Polina Prokopovich, Stephanos Theodossiades, Homer Rahnejat, D. Hodson

“…In many drug dispensing devices, such as syringes and inhalers, a rubber disk is used as a seal. During device actuation the seal is subjected to friction which in turn causes its deformation. …”
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Ultra-thin film tribology of elastomeric seals in pressurised metered dose inhalers by David W. Grimble

“…As such, the contact pressure distribution and resulting reactions have been investigated, with emphasis on the correct treatment of the elastomer (seal) characteristics. The modelling of the device has been conducted within the environment of the multibody dynamics commercial software ADAMS, where a virtual prototype has been built using solid CAD geometries of the valve components. …”
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Evaluating leakage from radial lip seals affected by bearing area of shaft topography by Emilia Kozuch, Petros Nomikos, Ramin Rahmani, Nick Morris, Homer Rahnejat

“…A hydrodynamic model is used to determine the generated pressure distribution within the seal-shaft contact. Pertinent statistical parameters are selected to distinguish between the various shaft surface topographies, which can contribute to an effectively sealed conjunction. …”
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A knowledge management perspective to shared service centers: a case study of a finance SSC by Ian Herbert, Will Seal

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Shared service centres and the role of the finance function: advancing the iron cage? by Ian Herbert, Will Seal

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The role of narrative in developing management control knowledge from fieldwork: a pragmatic constructivist perspective by Will Seal, Ruth Mattimoe

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Polymer bonding by induction heating for microfluidic applications by Benedikt J. Knauf

“…It was concluded that induction bonding can be used to seal plastic microfluidic devices. …”
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Anti-dialogic positioning in change stories: bank robbers, saviours and peons by Nic Beech, Stacy A. MacPhail, Christine Coupland

“…We argue that although the stories may have the appearance of being dialogical, they can be seen as co-existing but self-sealing, or anti-dialogic. …”
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Shared service centers and professional employability by Andrew T. Rothwell, Ian P. Herbert, William B. Seal

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Landfill capping stability: tapered solution with seepage by Bo Zhang, Gary Fowmes, D. Russell V. Jones

“…When using artificial sealing materials (e.g. a geomembrane) as the capping liner, the stability of the cover soils and integrity of the geosynthethics need to be assessed. …”
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Gas in engine cooling systems: occurrence, effects and mitigation by Peter Woollen

“…The presence of gas in engine liquid cooling systems can have severe consequences for engine efficiency and life. …”
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Multi-phase thermal cavitation flow in rough conforming and partially conforming conjunctions by Hamed Shahmohamadi

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Improving the airtightness in an existing UK dwelling: the challenges, the measures and their effectiveness by Mark Gillott, Dennis Loveday, J. White, C.J. Wood, Ksenia Chmutina, Keyur Vadodaria

“…Air infiltration, occurring through gaps in the building envelope, can contribute up to one third of total heat losses associated with older UK dwellings [1]. …”
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Low volume flush wc design by R.H.M. Wakelin, J.A. Swaffield, R.A. Bocarro

“…Water usage by w.c. flushing can represent a major portion of the total water use in a dwelling and may be sufficient to prevent the introduction of such sanitary facilities in developing country applications where water is in short supply. …”
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A new friction model in hybrid pump-controlled asymmetric (single-rod) cylinder drive system by Huankun Wang, Paul Leaney

“…For example, dynamic friction models are suitable for simulating the friction in hydraulic cylinder seals under lubrication conditions. Among the dynamic models, the LuGre model can capture almost all static and dynamic friction behaviors at the macroscopic level; for example, stiction, the Stribeck effect, and hysteresis. …”
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Major reduction in chemical curatives for rubber articles by Ali Ansarifar, Saad H. Sheikh

“…The sulfur cure system in the ethylene-propylene-diene (EPDM)-based Curtain Wall Seal (CWS) has two accelerators, adding up to 2.75 parts per hundred rubber (phr) by weight, and two activators (ZnO: 5phr, stearic acid:1phr). …”
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Cavitating flow in engine piston ring-cylinder liner conjunction by Hamed Shahmohamadi, Ramin Rahmani, Homer Rahnejat, Paul King, Colin Garner

“…Paradoxically, the required sealing function of the compressions ring can result in increased friction. …”
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Constant temperature induced stresses in evacuated enclosures for high performance flat plate solar thermal collectors by Paul Henshall, Philip Eames, Farid Arya, Trevor Hyde, Roger Moss, Stan Shire

“…It is demonstrated that with a suitably low temperature sealing process vacuum the designed enclosure can successfully withstand imposed stresses.…”
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Optimisation of piston compression ring for improved energy efficiency of high performance race engines by Nick Morris, Mahdi Mohammadpour, Ramin Rahmani, Homer Rahnejat

“…The primary function of the piston compression ring is to seal the combustion chamber from the bottom end of the engine. …”
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Computational evaluation of mitral valve repair with MitraClip by Brandon Prescott, C. Abunassar, Konstantinos Baxevanakis, Liguo Zhao

“…Aim: This paper aims to evaluate the effectiveness of MitraClip implantation as a solution to severe mitral regurgitation (MR) in the case of posterior leaflet prolapse due to Hypertrophic Obstructive Cardiomyopathy (HOCM) and chordae rupture. Methods: NX CAD software was used to create a surface geometric model for the Mitral Valve (MV). …”
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Impact of multi-day rainfall events on surface roughness and physical crusting of very fine soils by Joanna Bullard, Annie Ockelford, Craig L. Strong, Helene A. Aubault

“…Rainfall is an important determinant of SSR as it can cause the dislocation, reorientation and packing of soil particles and may result in the formation of physical soil crusts which can, in turn, affect the roughness and hydrological properties of soils. …”
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Coupled elastodynamics of piston compression ring subject to sweep excitation by Rob Turnbull, Mahdi Mohammadpour, Ramin Rahmani, Homer Rahnejat, Gunter Offner

“…An implication of these motions can be loss of sealing, gas blow-by, loss of power and lubricant degradation/oil loss, to name but a few. …”
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Simulator testing of evacuated flat plate solar collectors for industrial heat and building integration by Roger Moss, Paul Henshall, Farid Arya, Stan Shire, Philip Eames, Trevor Hyde

“…Evacuated tubes are now mass-produced in large numbers; evacuated flat plate collectors could in principle replace these tubes if the technical difficulties in creating extended metal-glass seals can be overcome. The experimental experiences described here should indicate targets for future research. …”
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Design and numerical simulation characterisation of additively manufactured bioreactors for tissue engineering applications by Kerry Chaplin

“…This limitation could be overcome through the use of perfusion bioreactors which can increase mass transfer into the construct and replicate mechanical cues such as shear stress. …”
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Environmental performance of a naturally ventilated city centre library by Birgit Krausse, Malcolm Cook, Kevin Lomas

“…By using lightwells and perimeter stacks to supply and exhaust air, it can be ventilated by natural means despite its deep plan form and sealed fac¸ade. …”
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Application of adhesives in MEMS and MOEMS assembly: a review by Farhad Sarvar, David Hutt, David Whalley

“…Many failure modes in MEMS devices can be attributed to the adhesives used in the assembly; for example, thermal expansion mismatches can cause stress in the die attach, while outgassing from epoxies can cause failure of sealed devices and contamination of optical surfaces.…”
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EcoPrinting: investigation of solar powered plastic recycling and additive manufacturing for enhanced waste management and sustainable manufacturing by Mazher Mohammed, Daniel Wilson, Eli Gomez-Kervin, Lucas Rosson, Johannes Long

“…To achieve this goal, we demonstrate a nanogrid device by which solar energy can be stored in a modest sized battery system and use this to power instrumentation for melt extrusion of waste polymers into 3D printer filaments. …”
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Environmental performance of a naturally ventilated city centre library by Birgit Krausse, Malcolm J. Cook, Kevin Lomas

“…By using lightwells and perimeter stacks to supply and exhaust air, it can be adequately ventilated by natural means despite its deep plan form and sealed façade. …”
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On the transient three dimensional tribodynamics of internal combustion engine top compression ring by Christopher E. Baker, Stephanos Theodossiades, Ramin Rahmani, Homer Rahnejat, Brian Fitzsimons

“…Piston-cylinder system accounts for nearly half of all the frictional losses. Loss of sealing functionality of the ring pack can also contribute significantly to power losses as well as exacerbating harmful emissions. …”
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Sustainable buildings for a warmer world by Kevin Lomas, Malcolm J. Cook

“…Hybrid buildings, a mix of natural ventilation and mechanical cooling, are touted as one solution. But can hybrid buildings have dramatically reduced CO2 emissions? …”
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Energy efficiency refurbishment of UK owner-occupied homes: the householders’ perspective by Kate Simpson

“…The findings show that in terms of refurbishment process, measures which installers’ have more apparent experience in, such as combination boiler or window replacements have few unexpected events and outcomes, whereas measures such as external wall insulation and air leakage sealing can lead to refurbishment delays or dissatisfaction with workmanship. …”
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Design and fabrication of a micro reciprocating engine by Kyle Jiang, Peng Jin, Jung-Sik Kim

“…m thick SU-8 layers and the quality of the fabrication results can be compared with those made by using X ray exposure process in the same Ihichiess. …”
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A review of performance degradation and failure modes for hydrogen-fuelled polymer electrolyte fuel cells by Pratap Rama, Rui Chen, J.D. Andrews

“…The major PEFC components considered here that are susceptible to faults are the polymer electrolyte-based membrane, the anode and cathode catalyst layers, gas diffusion and microporous layers, seals and the bipolar plate. Faults pertaining to these components can cause irreversible increases in activation, mass transportation, ohmic and fuel efficiency losses, or indeed cause catastrophic cell failure.…”
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Effect of compression ring elastodynamics behaviour upon blowby and power loss by Christopher E. Baker, Ramin Rahmani, Ioannis Karagiannis, Stephanos Theodossiades, Homer Rahnejat, Alan Frendt

“…The automotive industry is subject to increasing pressure to reduce the CO emissions and improve fuel efficiency in internal combustion engines. …”
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Facilitating inclusivity and broadening understandings of access at football clubs: the role of disabled supporter associations by Borja Garcia-Garcia, Mads de Wolff, Joanna Welford, Brett M. Smith

“…Implications: Conceptual understandings of access and inclusion can be broadened by using Nind and Seale’s model. …”
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Influence of advanced cylinder coatings on vehicular fuel economy and emissions in piston compression ring conjunction by Nader Dolatabadi, Michael Forder, Nick Morris, Ramin Rahmani, Homer Rahnejat, Sebastian Howell-Smith

“…The DLC coating is detrimental in terms of frictional power loss and FMEP, although it can effectively improve sealing of the combustion chamber. …”
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Modelling robotic manipulation of deformable linear objects in constricting environments by Dom McKean

“…Together they produce Over 1.3 million cars and 78,000 commercial vehicles every year[1], [2]. …”
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Surface specific asperity model for prediction of friction in boundary and mixed regimes of lubrication by Michael Leighton, Nick Morris, Ramin Rahmani, Homer Rahnejat

“…Machine downsizing, increased loading and better sealing performance have progressively led to thinner lubricant films and an increased chance of direct surface interaction. …”
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