friction

Summary

Summary: Surface resistance to the relative motion of one body against the rubbing, sliding, rolling, or flowing of another with which it is in contact.

Top Publications

  1. ncbi Friction and torque govern the relaxation of DNA supercoils by eukaryotic topoisomerase IB
    Daniel A Koster
    Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
    Nature 434:671-4. 2005
  2. ncbi Comparison of smooth and hairy attachment pads in insects: friction, adhesion and mechanisms for direction-dependence
    James M R Bullock
    Department of Zoology, University of Cambridge, Cambridge, UK
    J Exp Biol 211:3333-43. 2008
  3. ncbi Comparison of frictional forces during the initial leveling stage in various combinations of self-ligating brackets and archwires with a custom-designed typodont system
    Tae Kyung Kim
    Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, South Korea
    Am J Orthod Dentofacial Orthop 133:187.e15-24. 2008
  4. pmc Adhesion and friction in gecko toe attachment and detachment
    Yu Tian
    Department of Chemical Engineering and California NanoSystems Institute CNSI, University of California, Santa Barbara, CA 93106, USA
    Proc Natl Acad Sci U S A 103:19320-5. 2006
  5. pmc Wet but not slippery: Boundary friction in tree frog adhesive toe pads
    W Federle
    Division of Environmental and Evolutionary Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK
    J R Soc Interface 3:689-97. 2006
  6. ncbi Forces released during sliding mechanics with passive self-ligating brackets or nonconventional elastomeric ligatures
    Lorenzo Franchi
    Department of Orthodontics, University of Florence, Florence, Italy
    Am J Orthod Dentofacial Orthop 133:87-90. 2008
  7. ncbi Evaluation of the frictional resistance of conventional and self-ligating bracket designs using standardized archwires and dental typodonts
    Sandra P Henao
    Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC 27599, USA
    Angle Orthod 74:202-11. 2004
  8. pmc Finger pad friction and its role in grip and touch
    Michael J Adams
    School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
    J R Soc Interface 10:20120467. 2013
  9. ncbi Effect of archwire size and material on the resistance to sliding of self-ligating brackets with second-order angulation in the dry state
    Glenys A Thorstenson
    Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC 27599, USA
    Am J Orthod Dentofacial Orthop 122:295-305. 2002
  10. ncbi Roughness-dependent friction force of the tarsal claw system in the beetle Pachnoda marginata (Coleoptera, Scarabaeidae)
    Zhendong Dai
    Biological Microtribology Group, Division II, Max Planck Institute of Developmental Biology, Spemannstrasse 35, D 72076, Tuebingen, Germany
    J Exp Biol 205:2479-88. 2002

Detail Information

Publications316 found, 100 shown here

  1. ncbi Friction and torque govern the relaxation of DNA supercoils by eukaryotic topoisomerase IB
    Daniel A Koster
    Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
    Nature 434:671-4. 2005
    ..real-time single-molecule observation, we show that TopIB releases supercoils by a swivel mechanism that involves friction between the rotating DNA and the enzyme cavity: that is, the DNA does not freely rotate...
  2. ncbi Comparison of smooth and hairy attachment pads in insects: friction, adhesion and mechanisms for direction-dependence
    James M R Bullock
    Department of Zoology, University of Cambridge, Cambridge, UK
    J Exp Biol 211:3333-43. 2008
    ..However, no study has yet compared the basic performance of both systems. As such, we measured single-pad friction and adhesion forces in sample hairy (Gastrophysa viridula) and smooth (Carausius morosus) pads and simultaneously ..
  3. ncbi Comparison of frictional forces during the initial leveling stage in various combinations of self-ligating brackets and archwires with a custom-designed typodont system
    Tae Kyung Kim
    Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, South Korea
    Am J Orthod Dentofacial Orthop 133:187.e15-24. 2008
    ....
  4. pmc Adhesion and friction in gecko toe attachment and detachment
    Yu Tian
    Department of Chemical Engineering and California NanoSystems Institute CNSI, University of California, Santa Barbara, CA 93106, USA
    Proc Natl Acad Sci U S A 103:19320-5. 2006
    Geckos can run rapidly on walls and ceilings, requiring high friction forces (on walls) and adhesion forces (on ceilings), with typical step intervals of approximately 20 ms...
  5. pmc Wet but not slippery: Boundary friction in tree frog adhesive toe pads
    W Federle
    Division of Environmental and Evolutionary Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK
    J R Soc Interface 3:689-97. 2006
    ..the contact zone in Litoria caerulea, that tree frog attachment forces are significantly enhanced by close contacts and boundary friction between the pad epidermis and the substrate, facilitated by the highly regular pad microstructure.
  6. ncbi Forces released during sliding mechanics with passive self-ligating brackets or nonconventional elastomeric ligatures
    Lorenzo Franchi
    Department of Orthodontics, University of Florence, Florence, Italy
    Am J Orthod Dentofacial Orthop 133:87-90. 2008
    ....
  7. ncbi Evaluation of the frictional resistance of conventional and self-ligating bracket designs using standardized archwires and dental typodonts
    Sandra P Henao
    Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC 27599, USA
    Angle Orthod 74:202-11. 2004
    ..These test outcomes illustrated how bracket design, wire size, malocclusion, and ambient state influenced drawing forces...
  8. pmc Finger pad friction and its role in grip and touch
    Michael J Adams
    School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
    J R Soc Interface 10:20120467. 2013
    ..While it is well established that friction plays a crucial role in grip function, its exact contribution for discriminatory touch involving the sliding of a ..
  9. ncbi Effect of archwire size and material on the resistance to sliding of self-ligating brackets with second-order angulation in the dry state
    Glenys A Thorstenson
    Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC 27599, USA
    Am J Orthod Dentofacial Orthop 122:295-305. 2002
    ..6 to 5.4 cN/degree. The treatment objectives for a particular patient at a specific stage should determine the appropriate archwire-bracket combination...
  10. ncbi Roughness-dependent friction force of the tarsal claw system in the beetle Pachnoda marginata (Coleoptera, Scarabaeidae)
    Zhendong Dai
    Biological Microtribology Group, Division II, Max Planck Institute of Developmental Biology, Spemannstrasse 35, D 72076, Tuebingen, Germany
    J Exp Biol 205:2479-88. 2002
    ..Data from these different approaches led us to propose a model explaining the saturation of friction force with increased texture roughness...
  11. pmc Tumor suppressor p53 slides on DNA with low friction and high stability
    Anahita Tafvizi
    Harvard Massachusetts Institute of Technology, Division of Health Sciences and Technology, Cambridge, Massachusetts, USA
    Biophys J 95:L01-3. 2008
    ..We further investigate the mechanism of translocation and determine that p53 is capable of sliding--moving along DNA while in continuous contact with the duplex, rather than through a series of hops between nearby bases...
  12. pmc Systematic breakdown of Amontons' law of friction for an elastic object locally obeying Amontons' law
    Michio Otsuki
    Department of Physics and Mathematics, Aoyama Gakuin University, 5 10 1 Fuchinobe, Sagamihara 252 5258, Japan
    Sci Rep 3:1586. 2013
    In many sliding systems consisting of solid object on a solid substrate under dry condition, the friction force does not depend on the apparent contact area and is proportional to the loading force...
  13. pmc More than motility: Salmonella flagella contribute to overriding friction and facilitating colony hydration during swarming
    Jonathan D Partridge
    Section of Molecular Genetics and Microbiology and Institute of Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, USA
    J Bacteriol 195:919-29. 2013
    ..We surmise that bacteria use the resulting increase in motor power to overcome the higher friction associated with harder agar...
  14. ncbi In vitro study of frictional forces during sliding mechanics of "reduced-friction" brackets
    Meir Redlich
    Department of Orthodontics, Hebrew University Hadassah Faculty of Dental Medicine, Jerusalem, Israel
    Am J Orthod Dentofacial Orthop 124:69-73. 2003
    This study evaluated the static friction force created between archwires and "reduced-friction" brackets during sliding mechanics...
  15. ncbi Evaluation of frictional forces during dental alignment: an experimental model with 3 nonleveled brackets
    Giovanni Matarese
    Department of Orthodontics, University of Messina, Messina, Italy
    Am J Orthod Dentofacial Orthop 133:708-15. 2008
    ....
  16. ncbi Resistance to sliding with 3 types of elastomeric modules
    Helen Sylvia Griffiths
    Bristol Dental Hospital and School, Lower Maudlin Street, Bristol BS1 2LY, UK
    Am J Orthod Dentofacial Orthop 127:670-5; quiz 754. 2005
    ..The manufacturer claims it will significantly reduce friction. The purposes of this study were to determine whether Super Slick modules show lower friction than round and ..
  17. ncbi Effect of swing phase load on metal-on-metal hip lubrication, friction and wear
    Sophie Williams
    School of Mechanical Engineering, Institute of Medical and Biological Engineering, University of Leeds, Leeds, LS2 9JT, UK
    J Biomech 39:2274-81. 2006
    ..surgery may alter loading of THRs during the swing phase of gait leading to changes in fluid film lubrication, friction and wear...
  18. ncbi Static frictional force and surface roughness of various bracket and wire combinations
    Umal H Doshi
    Department of Orthodontics, Government Dental College and Hospital, Nagpur, Maharashtra, India
    Am J Orthod Dentofacial Orthop 139:74-9. 2011
    ..019 × 0.025-in)-stainless steel, nickel-titanium, titanium-molybdenum alloy (TMA), and low-friction colored TMA.
  19. pmc Insect aquaplaning: Nepenthes pitcher plants capture prey with the peristome, a fully wettable water-lubricated anisotropic surface
    Holger F Bohn
    Zoologie II, Biozentrum, Am Hubland, 97074 Wurzburg, Germany
    Proc Natl Acad Sci U S A 101:14138-43. 2004
    ..By measuring friction forces of weaver ants (Oecophylla smaragdina) on the peristome surface of Nepenthes bicalcarata, we demonstrate ..
  20. pmc Experimental evidence for a frustrated energy landscape in a three-helix-bundle protein family
    Beth G Wensley
    Department of Chemistry, University of Cambridge, MRC Centre for Protein Engineering, Lensfield Rd, Cambridge CB2 1EW UK
    Nature 463:685-8. 2010
    ..Here we show that landscape roughness (internal friction) is responsible for the slower folding and unfolding of R16 and R17...
  21. ncbi Evaluation of friction of stainless steel and esthetic self-ligating brackets in various bracket-archwire combinations
    Vittorio Cacciafesta
    Department of Orthodontics, University of Pavia, Italy
    Am J Orthod Dentofacial Orthop 124:395-402. 2003
    ..Both static and kinetic friction were measured on a custom-designed apparatus...
  22. ncbi Friction and resistance to sliding in orthodontics: a critical review
    S Jack Burrow
    Adjunct Professor, Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
    Am J Orthod Dentofacial Orthop 135:442-7. 2009
    Despite the emphasis it now receives in the marketing of self-ligating brackets, friction is not the major component of resistance to sliding in clinical treatment...
  23. ncbi Measurement of friction forces between stainless steel wires and "reduced-friction" self-ligating brackets
    Natalie Reznikov
    Department of Orthodontics, Hadassah Hebrew University, Jerusalem, Israel
    Am J Orthod Dentofacial Orthop 138:330-8. 2010
    In this study, we assessed the friction forces between various self-ligating brackets and stainless steel orthodontic wires, subjected to different shear and bending forces in the buccolingual plane.
  24. ncbi Low biofouling chitosan-hyaluronic acid multilayers with ultra-low friction coefficients
    Jeroen H H Bongaerts
    Unilever Corporate Research, Colworth Science Park, Sharnbrook, Bedfordshire, United Kingdom
    Biomacromolecules 10:1287-94. 2009
    ..The boundary friction coefficient under aqueous conditions was extremely low (mu approximately 0...
  25. ncbi Lubrication at physiological pressures by polyzwitterionic brushes
    Meng Chen
    Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford OX1 3QZ, UK
    Science 323:1698-701. 2009
    The very low sliding friction at natural synovial joints, which have friction coefficients of mu < 0...
  26. ncbi The effect of ligation method on friction in sliding mechanics
    Max Hain
    Orthodontic Unit, School of Dentistry, University of Birmingham, Birmingham, United Kingdom
    Am J Orthod Dentofacial Orthop 123:416-22. 2003
    During orthodontic tooth movement with the preadjusted edgewise system, friction generated at the bracket/archwire interface tends to impede the desired movement. The method of ligation is an important contributor to this frictional force...
  27. ncbi Accuracy of friction-style and spring-style mechanical torque limiting devices for dental implants
    Mark C Vallee
    Division of Prosthodontics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN 55455, USA
    J Prosthet Dent 100:86-92. 2008
    ..Mechanical torque limiting devices (MTLDs) are available in 2 different styles that have not been compared for accuracy...
  28. ncbi In-vitro evaluation of frictional resistance between brackets with passive-ligation designs
    Chin Liang Yeh
    Department of Orthodontics and Pediatric Dentistry, National Defense Medical Center, Taipei, Taiwan
    Am J Orthod Dentofacial Orthop 131:704.e11-22. 2007
    ..The aims of this study were to evaluate the frictional resistance of brackets with passive ligation and to compare these values with corresponding controls...
  29. ncbi A continuous measure of fingertip friction during precision grip
    Thibaut André
    Rehabilitation and Physical Medicine Unit, Universite Catholique de Louvain, Unité READ 5375, 53 avenue Mounier, 1200 Brussels, Belgium
    J Neurosci Methods 179:224-9. 2009
    ..As a consequence, fingertip skin friction plays a critical role during object manipulation...
  30. ncbi An in vitro investigation of the influence of self-ligating brackets, low friction ligatures, and archwire on frictional resistance
    Simona Tecco
    Department of Oral Science, University G D Annunzio, Chieti, Pescara, Italy
    Eur J Orthod 29:390-7. 2007
    ..stainless steel (SS) brackets (Victory Series), self-ligating Damon SL II brackets, Time Plus brackets, and low-friction ligatures (Slide) coupled with various SS, nickel-titanium (NiTi), and beta-titanium (TMA) archwires...
  31. ncbi A prospective study of floor surface, shoes, floor cleaning and slipping in US limited-service restaurant workers
    Santosh K Verma
    Center for Injury Epidemiology, Liberty Mutual Research Institute for Safety, Hopkinton, Massachusetts, USA
    Occup Environ Med 68:279-85. 2011
    ..This study examined the association between floor surface characteristics, slip-resistant shoes, floor cleaning frequency and the risk of slipping in limited-service restaurant workers...
  32. ncbi In vitro evaluation of the frictional forces between brackets and archwire with three passive self-ligating brackets
    Giancarlo Cordasco
    Department of Orthodontics, University of Messina, Italy
    Eur J Orthod 31:643-6. 2009
    ..01) than those resulting from elastic ligation. The same result was achieved when comparing self-ligation and metallic ligation (P < 0.01). No significant difference was found when comparing elastic and metallic ligation...
  33. pmc Effects of age-related gait changes on the biomechanics of slips and falls
    Thurmon E Lockhart
    Grado Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
    Ergonomics 46:1136-60. 2003
    ..Older participants' initial friction demand, as measured by required coefficient of friction (RCOF), was not significantly different than their ..
  34. ncbi Debris, roughness and friction of stainless steel archwires following clinical use
    Isabella Silva Vieira Marques
    Department of Orthodontics, Brazil Federal University, Pará State, Belem, Brazil
    Angle Orthod 80:521-7. 2010
    To investigate the degree of debris, roughness, and friction of stainless steel orthodontic archwires before and after clinical use.
  35. ncbi Melanocyte detachment after skin friction in non lesional skin of patients with generalized vitiligo
    Y Gauthier
    Department of Dermatology, Centre Hospitalier Universitaire de Bordeaux, Hôpital Saint André, 1 rue Jean Burguet, France
    Br J Dermatol 148:95-101. 2003
    ..The starting point of vitiligo macules is frequently determined by local conditions such as wounds and excoriations, but may also follow minor traumas such as pressure or repeated friction. This prominent feature is often neglected.
  36. ncbi The validity and reliability of a portable slip meter for determining floor slipperiness during simulated heel strike
    Raoul Gronqvist
    Liberty Mutual Research Center for Safety and Health, Hopkinton, MA 01748, USA
    Accid Anal Prev 35:211-25. 2003
    ..This new test rig was designed to measure transitional friction properties of contaminated floor surfaces during simulated heel strike, which is considered the most critical ..
  37. ncbi Impaired discrimination of surface friction contributes to pinch grip deficit after stroke
    Jannette M Blennerhassett
    Physiotherapy Department, Austin Health Royal Talbot Rehabilitation Centre, Kew, Vic, Australia Jannette Blennerhassett austin org au
    Neurorehabil Neural Repair 21:263-72. 2007
    ..Clinically, training is usually directed to motor impairment rather than sensory impairment despite the prevalence of sensory deficit and the importance of sensory input for grip control...
  38. pmc Friction between different wire bracket combinations in artificial saliva--an in vitro evaluation
    Tatiana Kelly da Silva Fidalgo
    Dental School, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
    J Appl Oral Sci 19:57-62. 2011
    The objective this work was to assess the friction coefficient between brackets and wires of different materials under conditions simulating the oral environment.
  39. ncbi Friction of total hip replacements with different bearings and loading conditions
    Claire Brockett
    Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
    J Biomed Mater Res B Appl Biomater 81:508-15. 2007
    ..A range of 28 mm diameter bearings were investigated using a hip friction simulator, including conventional material combinations such as metal-on-UHWMPE, ceramic-on-ceramic (CoC), and ..
  40. ncbi Friction of conventional and self-ligating brackets using a 10 bracket model
    Simona Tecco
    Department of Oral Sciences, University G D Annunzio, Chieti Pescara, Chieti, Italy
    Angle Orthod 75:1041-5. 2005
    The friction generated by various bracket-archwire combinations previously has been studied using in vitro testing models that included only one or three brackets...
  41. pmc Friction-based stabilization of juxtacellular recordings in freely moving rats
    Lucas Herfst
    Bernstein Center for Computational Neuroscience, Humboldt University of Berlin, Berlin, Germany
    J Neurophysiol 108:697-707. 2012
    ..This method involves the use of a friction-based device that allows stabilization of the recording pipette by friction forces...
  42. ncbi Liquid-infused nanostructured surfaces with extreme anti-ice and anti-frost performance
    Philseok Kim
    Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts 02138, USA
    ACS Nano 6:6569-77. 2012
    ..These results indicate that SLIPS is a promising candidate for developing robust anti-icing materials for broad applications, such as refrigeration, aviation, roofs, wires, outdoor signs, railings, and wind turbines...
  43. pmc Human-centred approaches in slipperiness measurement
    R Gronqvist
    Finnish Institute of Occupational Health, Department of Physics, Helsinki
    Ergonomics 44:1167-99. 2001
    ..Current friction-based criteria and thresholds for walking without slipping are reviewed for a number of work tasks...
  44. ncbi Slipping, sliding and stability: locomotor strategies for overcoming low-friction surfaces
    Andrew J Clark
    Department of Biological Sciences, Clemson University, 132 Long Hall, Clemson, SC 29634, USA
    J Exp Biol 214:1369-78. 2011
    ..nonfatal injuries frequently result from slip-induced falls precipitated by sudden unexpected encounters with low-friction surfaces...
  45. ncbi Friction force measurement during cochlear implant insertion: application to a force-controlled insertion tool design
    Mathieu Miroir
    Paris Diderot Univ, Sorbonne Paris Cité, Laboratoire, Paris, France
    Otol Neurotol 33:1092-100. 2012
    ..The aim of the study was to evaluate force profiles during array insertion in human cochlea specimens and to evaluate a mechatronic inserter using a 1-axis force sensor...
  46. pmc Shearing of fibrillar adhesive microstructure: friction and shear-related changes in pull-off force
    M Varenberg
    Department of Thin Films and Biological Systems, Max Planck Institute for Metals Research, Heisenbergstrasse 3, Stuttgart 70569, Germany
    J R Soc Interface 4:721-5. 2007
    To characterize the effect of shearing on function of fibrillar adhesive microstructure, friction and shear-related changes in pull-off force of a biomimetic polyvinylsiloxane mushroom-shaped fibrillar adhesive microstructure were studied...
  47. ncbi Comparison of resistance to sliding between different self-ligating brackets with second-order angulation in the dry and saliva states
    Glenys A Thorstenson
    Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC 27599, USA
    Am J Orthod Dentofacial Orthop 121:472-82. 2002
    ..Below each characteristic critical angle, brackets with passive slides exhibited negligible friction; brackets with active clips exhibited frictional forces as great as 50 cN (50 g)...
  48. ncbi Evaluation of friction of conventional and metal-insert ceramic brackets in various bracket-archwire combinations
    Vittorio Cacciafesta
    Department of Orthodontics, University of Pavia, Italy
    Am J Orthod Dentofacial Orthop 124:403-9. 2003
    ..Static and kinetic friction were measured on a specially designed apparatus...
  49. ncbi Friction melanosis: a clinical, histologic, and ultrastructural study in Jordanian patients
    Mustafa Al-Aboosi
    Jordan University of Science and Technology and Yarmouk University, Irbid, Jordan
    Int J Dermatol 43:261-4. 2004
    b>Friction melanosis (FM) is an acquired pigmentary disorder mainly affecting young people. The primary skin regions affected are located over the osseous prominences, especially the clavicular zone and upper back...
  50. ncbi Tribology and wear of metal-on-metal hip prostheses: influence of cup angle and head position
    Sophie Williams
    Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
    J Bone Joint Surg Am 90:111-7. 2008
    ..The aim of this study was to test the hypothesis that both a steep cup angle and a lateralized position of the head can increase head contact on the superior rim of the cup, with the consequence of increased wear...
  51. ncbi Friction induced skin tags
    Francisco Allegue
    Department of Dermatology, Complejo Hospitalario Universitario de Vigo Vigo, Spain
    Dermatol Online J 14:18. 2008
    ..Despite their high incidence data about their etiopathogenesis are scarce in the medical literature. We describe a patient who developed multiple skin tags arranged in a linear fashion suggesting an etiopathogenic role for friction.
  52. pmc Influence of epidermal hydration on the friction of human skin against textiles
    L C Gerhardt
    Laboratory for Protection and Physiology, Empa, Swiss Federal Laboratories for Materials Testing and Research, St Gallen, Switzerland
    J R Soc Interface 5:1317-28. 2008
    b>Friction and shear forces, as well as moisture between the human skin and textiles are critical factors in the formation of skin injuries such as blisters, abrasions and decubitus...
  53. ncbi Friction in airway smooth muscle: mechanism, latch, and implications in asthma
    J J Fredberg
    Department of Environmental Health, Harvard School of Public Health, Boston, Massachsetts 02115, USA
    J Appl Physiol (1985) 81:2703-12. 1996
    ..interactions and shortening velocity reflects their turnover rates, but the molecular basis of mechanical friction is somewhat less clear...
  54. ncbi The nonlinear nature of friction
    Michael Urbakh
    School of Chemistry, Raymond and Beverley Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
    Nature 430:525-8. 2004
    Tribology is the study of adhesion, friction, lubrication and wear of surfaces in relative motion. It remains as important today as it was in ancient times, arising in the fields of physics, chemistry, geology, biology and engineering...
  55. ncbi Frictional evaluations of dental typodont models using four self-ligating designs and a conventional design
    Sandra P Henao
    Graduate Student, Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC 27599, USA
    Angle Orthod 75:75-85. 2005
    ..The best AW-bracket system can be selected, when taking into account the stiffness (elastic modulus and size of the AW) along with the amount of malocclusion present, once the treatment plan is determined...
  56. ncbi Undulatory swimming in sand: subsurface locomotion of the sandfish lizard
    Ryan D Maladen
    Interdisciplinary Bioengineering Program, Georgia Institute of Technology, Atlanta, GA 30332, USA
    Science 325:314-8. 2009
    ..The agreement between model and experiment implies that the noninertial swimming occurs in a frictional fluid...
  57. pmc Micro-mechanical modeling of the cement-bone interface: the effect of friction, morphology and material properties on the micromechanical response
    Dennis Janssen
    Radboud University Nijmegen Medical Centre, Orthopaedic Research Laboratory, P O Box 9101, 6500 HB Nijmegen, The Netherlands
    J Biomech 41:3158-63. 2008
    ..In five models the friction coefficient was varied (mu=0.0; 0.3; 0.7; 1.0 and 3...
  58. ncbi In vitro frictional forces generated by three different ligation methods
    Paola Gandini
    Department of Orthodontics, the University of Pisa, Pisa, Italy
    Angle Orthod 78:917-21. 2008
    ..To test the hypothesis that there is no difference between the frictional forces produced by a passive self-ligating bracket (SLB) in vitro and a conventional bracket (CB) used with two types of elastomeric ligatures...
  59. ncbi Frictional resistance in self-ligating orthodontic brackets and conventionally ligated brackets. A systematic review
    Sayeh Ehsani
    Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
    Angle Orthod 79:592-601. 2009
    ..To compare the amount of expressed frictional resistance between orthodontic self-ligating brackets and conventionally ligated brackets in vitro as reported in the literature...
  60. ncbi Forces produced by different nonconventional bracket or ligature systems during alignment of apically displaced teeth
    Tiziano Baccetti
    Department of Orthodontics, University of Florence, Florence, Italy
    Angle Orthod 79:533-9. 2009
    ....
  61. ncbi In vitro evaluation of frictional forces between archwires and ceramic brackets
    Clarice Nishio
    Department of Orthodontics, Universidade Federal Fluminense, Niteroi, RJ, Brazil
    Am J Orthod Dentofacial Orthop 125:56-64. 2004
    ..Brackets and wire were tested with tip angulations of 0 degrees and 10 degrees. Friction testing was done with the Emic DL 10000 testing machine (São José do Rio Preto, PR, Brazil), and the wires were ..
  62. ncbi Evaluation of methods of archwire ligation on frictional resistance
    Balvinder Khambay
    Unit of Orthodontics, Glasgow Dental School, UK
    Eur J Orthod 26:327-32. 2004
    ..Under the conditions of this experiment, the use of passive self-ligating brackets is the only method of almost eliminating friction.
  63. ncbi Self-ligation esthetic brackets with low frictional resistance
    John C Voudouris
    Department of Orthodontics, New York University, College of Dentistry, New York, NY, USA
    Angle Orthod 80:188-94. 2010
    ..To test the frictional resistance forces (FRS) generated between several archwires and (1) interactive self-ligating (ISL) brackets and (2) conventionally ligated (CL) brackets...
  64. pmc Microscale frictional response of bovine articular cartilage from atomic force microscopy
    Seonghun Park
    Departments of Mechanical Engineering and Biomedical Engineering, Columbia University, 500 West 120th St, MC4703, 220 S W Mudd, New York, NY 10027, USA
    J Biomech 37:1679-87. 2004
    The objective of this study was to compare micro- and macroscale friction coefficients of bovine articular cartilage...
  65. ncbi Influence of the meniscus on friction and degradation of cartilage in the natural knee joint
    L McCann
    Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, UK Woodhouse Lane, Leeds LS2 9JT, UK
    Osteoarthritis Cartilage 17:995-1000. 2009
    ..Relationships between friction and wear in synovial joints are complex due to the biphasic nature of articular cartilage and the time dependency ..
  66. ncbi Archwire seating forces produced by different ligation methods and their effect on frictional resistance
    Balvinder Khambay
    Unit of Orthodontics, Glasgow Dental School, 378 Sauchiehall Street, Glasgow G2 3JZ, Scotland, UK
    Eur J Orthod 27:302-8. 2005
    ..01). The force with which the wire was seated into the bracket did not seem to be related to the subsequent amount of mean frictional force produced...
  67. pmc Comparison of static friction with self-ligating, modified slot design and conventional brackets
    Raquel Morais Castro
    Pontifical Catholic University of Minas Gerais, Belo HorizonteMG, Brazil
    J Appl Oral Sci 21:314-9. 2013
    ..To compare the static frictional forces generated at the bracket/wire interface of stainless steel brackets with different geometries and angulations, combined with orthodontic wires of different diameters...
  68. ncbi Comparative evaluation of frictional forces in active and passive self-ligating brackets with various archwire alloys
    Manu Krishnan
    Army Dental Corps, Indian Army, Pathankot, Punjab, India
    Am J Orthod Dentofacial Orthop 136:675-82. 2009
    ....
  69. ncbi Friction coefficient of skin in real-time
    Raja K Sivamani
    Center for Tribology, Inc, Campbell, CA, USA
    Skin Res Technol 9:235-9. 2003
    b>Friction studies are useful in quantitatively investigating the skin surface. Previous studies utilized different apparatuses and materials for these investigations but there was no real-time test parameter control or monitoring...
  70. pmc Measuring internal friction of an ultrafast-folding protein
    Troy Cellmer
    Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892 0520, USA
    Proc Natl Acad Sci U S A 105:18320-5. 2008
    ..relaxation time on solvent viscosity indicates a major contribution to the dynamics from internal friction. The internal friction increases with increasing temperature, suggesting a shift in the transition state along ..
  71. ncbi Friction and wear behavior of ultra-high molecular weight polyethylene as a function of polymer crystallinity
    K S Kanaga Karuppiah
    Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA
    Acta Biomater 4:1401-10. 2008
    In this study the friction, wear and surface mechanical behavior of medical-grade ultra-high molecular weight polyethylene (UHMWPE) (GUR 1050 resin) were evaluated as a function of polymer crystallinity...
  72. ncbi Articular cartilage friction increases in hip joints after the removal of acetabular labrum
    Yongnam Song
    Department of Mechanical Engineering, Korea University, Seoul, Republic of Korea
    J Biomech 45:524-30. 2012
    ..We aimed to understand the role of the acetabular labrum in maintaining a low friction environment in the hip joint...
  73. pmc A technique to determine friction at the fingertips
    Adriana V Savescu
    Pennsylvania State University, University Park, PA, USA
    J Appl Biomech 24:43-50. 2008
    This article proposes a technique to calculate the coefficient of friction for the fingertip- object interface. Twelve subjects (6 males and 6 females) participated in two experiments...
  74. ncbi Friction variation in common working areas of fast-food restaurants in the USA
    Wen Ruey Chang
    Liberty Mutual Research Institute for Safety, Hopkinton, MA 01748, USA
    Ergonomics 51:1998-2012. 2008
    b>Friction variation has been related to employees' perception of slipperiness in a field study conducted in fast-food restaurants. However, details of friction variation in actual workplaces have not been reported in the literature...
  75. pmc Surface viscosity, diffusion, and intermonolayer friction: simulating sheared amphiphilic bilayers
    S A Shkulipa
    Computational Dispersion Rheology, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands
    Biophys J 89:823-9. 2005
    ..The second flow field, with a vorticity parallel to the bilayer, causes the two constituent monolayers to slide past one another, yielding the interlayer friction coefficient.
  76. ncbi Thermomechanical analysis of ultra-high molecular weight polyethylene-metal hip prostheses
    M Rocchi
    Laboratorio di Tecnologia Medica, Istituti Ortopedici Rizzoli, Bologna, Italy
    Proc Inst Mech Eng H 221:561-8. 2007
    ..The full coupling between the thermal and the mechanical conditions used in this study appears to be necessary if accurate predictions of the polyethylene deformation are required...
  77. ncbi In vitro friction and lubrication of large bearing hip prostheses
    S Flanagan
    Department of Materials, Science and Technology, University of Limerick, Limerick, Ireland
    Proc Inst Mech Eng H 224:853-64. 2010
    ..The study detailed here used a hip friction simulator to assess the friction and lubrication properties of large-diameter hip bearings of metal-on-metal and ..
  78. ncbi Assuming exponential decay by incorporating viscous damping improves the prediction of the coefficient of friction in pendulum tests of whole articular joints
    J J Crisco
    Bioengineering Laboratory, Department of Orthopaedics, Brown Medicine School Rhode Island Hospital, Providence, Rhode Island 02903, USA
    Proc Inst Mech Eng H 221:325-33. 2007
    ..test with a whole articular joint serving as the fulcrum is commonly used to measure the bulk coefficient of friction (COF)...
  79. ncbi Friction between various self-ligating brackets and archwire couples during sliding mechanics
    Sennay Stefanos
    Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
    Am J Orthod Dentofacial Orthop 138:463-7. 2010
    ..The aim of this study was to evaluate the frictional resistance between active and passive self-ligating brackets and 0.019 × 0.025-in stainless steel archwire during sliding mechanics by using an orthodontic sliding simulation device...
  80. ncbi The evaluation of skin friction using a frictional feel analyzer
    Mariko Egawa
    Shisedo Research Center SHIN YOKOHAMA, Yokohama, Japan
    Skin Res Technol 8:41-51. 2002
    ..The objective here is to measure skin surface friction using these devices and examine the correlation with other physiological parameters in order to evaluate the ..
  81. ncbi Does the design of self-ligating brackets show different behavior in terms of friction?
    Simona Tecco
    Department of Oral Science, Nano, and Biotechnology, University G D Annunzio, Chieti, Pescara, Italy
    Orthodontics (Chic.) 12:330-9. 2011
    This in vitro study evaluated the friction generated by aligned stainless steel conventional brackets, self-ligating Damon MX brackets, Time3 brackets, Vision LP brackets, and low-friction Slide ligatures coupled with various stainless ..
  82. ncbi The role of center of mass kinematics in predicting peak utilized coefficient of friction during walking
    Judith M Burnfield
    Movement Sciences Center, Institute for Rehabilitation Science and Engineering, Madonna Rehabilitation Hospital, 5401 South Street, Lincoln, NE 68506, USA
    J Forensic Sci 52:1328-33. 2007
    Slips frequently occur when the friction required between the foot and floor exceeds available surface slip resistance...
  83. ncbi Frictional heating of total hip implants. Part 1: measurements in patients
    G Bergmann
    Biomechanics Laboratory, Department of Orthopaedics, Free University of Berlin, Clayallee 229, 14195, Berlin, Germany
    J Biomech 34:421-8. 2001
    Hip implants heat up due to friction during long lasting, high loading activities like walking. Thermal damage in the surrounding soft and hard tissues and deteriorated lubrication of synovial fluid could contribute to implant loosening...
  84. ncbi Metal-on-metal articulation for artificial hip joints: laboratory study and clinical results
    R M Streicher
    Sulzer Orthopedics Limited, Winterthur, Switzerland
    Proc Inst Mech Eng H 210:223-32. 1996
    ..A wear-resistant combination with low friction characteristics has been developed by using a wrought Co-Cr-Mo-C alloy and reducing the implant diameter to 28 mm...
  85. ncbi Transition from static to kinetic friction: insights from a 2D model
    J Trømborg
    Physics of Geological Processes, University of Oslo, Norway
    Phys Rev Lett 107:074301. 2011
    We describe a 2D spring-block model for the transition from static to kinetic friction at an elastic-slider-rigid-substrate interface obeying a minimalistic friction law (Amontons-Coulomb)...
  86. ncbi Friction heat during self-drilling of an orthodontic miniscrew
    M Matsuoka
    Department of Orthodontics, Nihon University School of Dentistry, Tokyo, Japan
    Int J Oral Maxillofac Surg 40:191-4. 2011
    ..Installing self-drilling screws at high speeds with an implanter is not recommended; low speeds of less than 150 rpm should be used...
  87. pmc Role of uppermost superficial surface layer of articular cartilage in the lubrication mechanism of joints
    P Kumar
    Department of Tissue Regeneration. Institute for Frontier Medical Sciences, Kyoto University, Japan
    J Anat 199:241-50. 2001
    The uppermost superficial surface layer of articular cartilage, the 'lamina splendens' which provides a very low friction lubrication surface in articular joints, was investigated using atomic force microscopy (AFM)...
  88. ncbi Local nanoscale heating modulates single-asperity friction
    Christian Greiner
    Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Towne Building, 220 South 33rd Street, Philadelphia, Pennsylvania 19104, United States
    Nano Lett 10:4640-5. 2010
    We demonstrate measurement and control of single-asperity friction by using cantilever probes featuring an in situ solid-state heater...
  89. ncbi Adhesion and friction force coupling of gecko setal arrays: implications for structured adhesive surfaces
    Boxin Zhao
    Department of Chemical Engineering and Materials Research Laboratory, University of California at Santa Barbara, Santa Barbara, CA 93106, USA
    Langmuir 24:1517-24. 2008
    ..Thus, dragging the setal arrays along the gripping direction leads to strong adhesion and friction forces (as required during contact and attachment), whereas when shearing along the releasing direction, both ..
  90. ncbi Evaluation of frictional forces between ceramic brackets and archwires of different alloys compared with metal brackets
    Ariana Pulido Guerrero
    Pontifical Catholic University of Parana, Rua Imaculada Conceição 1155, Curitiba, PR, Brazil
    Braz Oral Res 24:40-5. 2010
    ..The nickel-titanium wires produced the lowest friction. The addition of metal slots in the polycrystalline brackets did not significantly decrease frictional values...
  91. ncbi Stochastic estimation of human arm impedance under nonlinear friction in robot joints: a model study
    Pyung Hun Chang
    Robot Control Laboratory, Department of Mechanical Engineering, KAIST, Daejeon 305 701, South Korea
    J Neurosci Methods 189:97-112. 2010
    ..In the present work, we have identified the degree of influence of nonlinear friction in robot joints to the stochastic human arm impedance estimation...
  92. ncbi Peptide chain dynamics in light and heavy water: zooming in on internal friction
    Julius C F Schulz
    Fachbereich Physik, Freie Universitat Berlin, 14195 Berlin, Germany
    J Am Chem Soc 134:6273-9. 2012
    ..Experimentally, such "internal friction" has been investigated by studying folding or binding kinetics at varying solvent viscosity; however, the ..
  93. pmc Comparison of two methods for calculating the frictional properties of articular cartilage using a simple pendulum and intact mouse knee joints
    Elizabeth I Drewniak
    Department of Orthopaedics, Bioengineering Laboratory, The Warren Alpert Medical School of Brown University RIH, Providence, RI, USA
    J Biomech 42:1996-9. 2009
    ..of articular cartilage (AC) in synovial joints, researchers have focused on joint tribology, the study of joint friction, lubrication, and wear...
  94. ncbi Effects of ligation type and method on the resistance to sliding of novel orthodontic brackets with second-order angulation in the dry and wet states
    Glenys A Thorstenson
    Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, USA
    Angle Orthod 73:418-30. 2003
    ..In both states, the coefficients of friction were similar for the Mini Diamond Twin, VersaT, and Synergy brackets; the values for the Shoulder brackets were ..
  95. ncbi Friction in metal-on-metal total disc arthroplasty: effect of ball radius
    Parshia Moghadas
    School of Mechanical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
    J Biomech 45:504-9. 2012
    ..This study was designed to determine the effects of ball radius on friction. Generic models of metal-on-metal TDA were manufactured with ball radii of 10, 12, 14 and 16 mm, with a radial ..
  96. pmc Cyclic loading increases friction and changes cartilage surface integrity in lubricin-mutant mouse knees
    Elizabeth I Drewniak
    Alpert Medical School of Brown University, Rhode Island Hospital Providence, Rhode Island 02903, USA
    Arthritis Rheum 64:465-73. 2012
    To investigate the effects of lubricin gene dosage and cyclic loading on whole joint coefficient of friction and articular cartilage surface integrity in mouse knee joints.
  97. pmc Friction-controlled traction force in cell adhesion
    Tilo Pompe
    Universitat Leipzig, Institute of Biochemistry, Leipzig, Germany
    Biophys J 101:1863-70. 2011
    ..We report a new (to our knowledge) mechanism of receptor force control in cell adhesion originating from friction between cell adhesion ligands and the supporting substrate...
  98. ncbi Within-trial modulation of multi-digit forces to friction
    Wei Zhang
    School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ 85287, USA
    Exp Brain Res 211:17-26. 2011
    ..Specifically, subjects adapt their digit forces to the object physical properties, including the friction at the object surface, to perform object manipulation while preventing slipping or dropping...
  99. ncbi A legged anchoring mechanism for capsule endoscopes using micropatterned adhesives
    Paul Glass
    Biomedical Engineering Department and NanoRobotics Laboratory, Carnegie Mellon University, Pittsburgh, PA 15213, USA
    IEEE Trans Biomed Eng 55:2759-67. 2008
    ..Empirical friction models for the interaction of the adhesives with an intestinal substrate were experimentally determined in vitro ..
  100. ncbi Coefficient of friction: tribological studies in man - an overview
    Raja K Sivamani
    Center for Tribology, Inc, Campbell, CA, USA
    Skin Res Technol 9:227-34. 2003
    Compared to other studies of skin, relatively few studies have focused on the friction of skin...
  101. ncbi Skin friction blistering: computer model
    Malcolm Xing
    Department of Biological System Engineering, University of California, Davis, CA, USA
    Skin Res Technol 13:310-6. 2007
    b>Friction blisters, a common injury in sports and military operations, can adversely effect or even halt performance. Given its frequency and hazardous nature, recent research efforts appear limited...

Research Grants65

  1. Skin Interface Friction Transducer
    JEFFREY SCHOESS; Fiscal Year: 2003
    Korosensor proposes to develop a skin interface friction transducer (SIFT) to prevent skin breakdown in diabetic mellitus patients, which can lead to foot ulceration and lower extremity amputation...
  2. Development of an Implantable "Plug and Play" TransApical to Aorta VAD
    Stephen Topaz; Fiscal Year: 2007
    ..that includes efficient, thrombus free heparin saline purged needle roller bearings, which decreases bearing friction, increases durability, improves pump efficiency, and prevents thrombosis generation...
  3. Endovascular Magnetic Catheter for Interventional MRI
    STEVEN WILLIAM HETTS; Fiscal Year: 2013
    ..better navigation of small, tortuous blood vessels that are currently difficult to catheterize due to build-up of friction at the many vascular bends between the femoral access site and the target blood vessel...
  4. Hands-Free Assistive Reading Technology for Persons with Disabilities
    IRENE SANDRA SCHIPPER; Fiscal Year: 2010
    ..In Phase I, we will identify the friction, force, and trajectory parameters for the pickup arm to reliably turn one page at a time across a wide range of ..
  5. Joint Capsule Biomechanics and Transport in Rat Models of Aging and Disease
    WILLIAM JOSEPH MCCARTY; Fiscal Year: 2012
    ..and cartilage play a large role in determining SF lubricant homeostasis and the ability of SF to provide low-friction, low-wear cartilage-on- cartilage sliding during joint articulation...
  6. Arm Motor Rehabilitation, Entertainment and Cognition System for the Elderly
    Grigore C Burdea; Fiscal Year: 2010
    ..METHODS 1) Construct the BC 100 system by creating a low-friction, vision-tracked rehabilitation table that tilts automatically to allow assistance/resistance to either arm motion;..
  7. Self Assembly of Cartilage by Mesenchymal Stem Cells on Porous Chitosan/CaP
    STEVEN HOWARD ELDER; Fiscal Year: 2010
    ..The thickness, sphericity, and coefficient of friction of this cartilage will be measured to assess its suitability for joint resurfacing...
  8. The Production and Dissipation of Energy in the Hair Bundle of the Inner Ear
    ADRIA CLAIRE LEBOEUF; Fiscal Year: 2010
    ..investigate the effects of the electrostatic forces of the stereociliary glycocalyx on the physical properties of friction and adhesion in the hair bundle...
  9. Identification of biomechanical pathways that promote hematopoiesis
    PAMELA LYNN WENZEL; Fiscal Year: 2013
    ..the midgestation embryo, blood flow begins after initiation of the heartbeat and subjects vessel walls to viscous friction, pressure, and stretching...
  10. A new multiphase polymeric material for cushion-bearing orthopedic implants
    BRUCE LAWRENCE CARVALHO; Fiscal Year: 2013
    ..Also, they are associated with very low friction since they can deform microscopically to induce fluid film lubrication associated with synovial fluid...
  11. Orthopedic Implants: Hypersonic Plasma Particle Deposition nano-porosity coatings
    Daniel A Fox; Fiscal Year: 2011
    ..As a succession of the above evaluation, we plan to examine more aspects in Phase II, including: coefficient of friction;corrosion resistance;fatigue resistance;in vivo biocompatibility on animal model;and wear particle analysis...
  12. Tribosupplementation of Injured Joints
    Gregory D Jay; Fiscal Year: 2013
    ..at the nanotribological foundation of the cartilage bearing, which is characterized by very low cartilage friction. The commercial value is high as this technology could improve the widespread practice of viscosupplementation ..
  13. Bioengineering Research Partnership in Total Joint Replacements
    Yogesh K Vohra; Fiscal Year: 2012
    ..multilayer diamond coatings on metal (CoCrMo or Ti-6Al-4V) orthopaedic devices with the goal of reducing friction and wear in articulation components...
  14. Biophysical Modeling of Fluid and Solute Transport in the TMJ Disc
    Hai Yao; Fiscal Year: 2010
    ..accomplish Specific Aim 2, we will determine time-dependent interstitial fluid pressure, fluid load support, and friction coefficient of porcine TMJ disc under sustained mechanical loading, and correlate fluid load support and friction ..
  15. Identification of factors affecting EMS workers adoption of MSD interventions
    Steven A Lavender; Fiscal Year: 2010
    ..The bridgeboard reduces friction and therein promotes sliding patients between surfaces...
  16. NIH SBIR Phase I: UNCD as Bio-Inert Interface for Anti-Thrombogenicity Applicati
    Hongjun Zeng; Fiscal Year: 2011
    ..diamond coating was successfully developed by the applicant for many diverse applications requiring low wear, low friction and chemical inertness...
  17. Tribosupplementation of Injured Joints
    Gregory D Jay; Fiscal Year: 2010
    ..and is directed at the nanotribological foundation of the cartilage bearing which is characterized by very low friction. The commercial value is high as this technology would augment the widespread practice of viscosupplementation ..
  18. Patterned Microtexture for Improved Durability of Orthopedic Knee Implants
    RONALD L JACOBSEN; Fiscal Year: 2013
    ..The current paradigm for combating implant wear is to minimize friction by employing ultra-smooth sliding surfaces...
  19. Distributed Sensing for Prosthetic Sockets
    ALEXANDER MAMISHEV; Fiscal Year: 2009
    ..These devices will allow much longer periods of comfortable wear without formation of friction blisters and other forms of skin and tissue damage...
  20. Nanotechnology Enabled Temporomandibular Joint (TMJ) Prosthesis
    RAYMOND G THOMPSON; Fiscal Year: 2010
    ..Our specific aims are as follows: Specific Aim 1: Develop nanotechnology for reducing friction and wear on the articulating, load-bearing components of TMJ metallic implants (condyle and fossa) by chemical ..
  21. Biofidelic Slip-Testing Device for Measuring &Analyzing Shoe-Floor Friction
    Brian Moyer; Fiscal Year: 2013
    ..testing conditions alter the tribological interaction at the shoe-floor interface and affect the coefficient of friction measurement...
  22. GLASS TRANSITION TEMPERATURE AND WEAR OF DENTAL RESINS
    JAN STANNARD; Fiscal Year: 1993
    ..Mechanical properties of compressive strength, tensile strength and coefficient of friction of the copolymers will be measured at several temperatures relative to their Tg and service temperature of 35oC...
  23. BIOTRIBOLOGY OF DIARTHRODIAL JOINTS
    Gerard A Ateshian; Fiscal Year: 2013
    ..of this contact force is supported by the contacting collagen-proteoglycan matrixes, producing a negligible friction force, and thus a low friction coefficient...
  24. Modeling shoe-floor interface properties to predict slips and falls
    Mark S Redfern; Fiscal Year: 2012
    ..and falls in the workplace through the development of a computational model that predicts the coefficient of friction (COF) of the shoe-floor-contaminant interface...
  25. Online Training for Foster and Primary Parents of Neglected Children
    JOSH WHITKIN; Fiscal Year: 2013
    ..own and their child's internal states as they navigate a typical day of interactions fraught with possible friction, as presented in dramatized video segments...
  26. PREHENSION SYNERGIES
    Mark L Latash; Fiscal Year: 2013
    ..a template control hypothesis according to which for every given combination of the object geometry and local friction the performers select a digit force pattern ('template') and then scale the digit forces with the load ..
  27. Stent Lock Mechanism for Transcutaneous Catheters
    NICHOLAS VITALE; Fiscal Year: 2005
    ..Instead of a mechanical interference fit, the mechanism uses high friction force to hold the catheter firmly in place...
  28. Circumferential Neuropathic Foot Protector System (CNEP)
    Jeffrey Jensen; Fiscal Year: 2001
    ..with diabetes have peripheral neuropathy and cannot feel foot trauma from ground-reactive (shock) and shearing (friction) forces...
  29. IMMUNOPROBES FOR LUBRICIN FROM HUMAN SYNOVIAL FLUID
    Gregory Jay; Fiscal Year: 2003
    ..Direct measurements documents that synovial fluid lowers the coefficient of friction between cartilage bearings and certain artificial surfaces...
  30. Mechanisms of Articular Cartilage Lubrication
    Robert L Sah; Fiscal Year: 2010
    ..body that bears load and slides relative to an apposing tissue surface with remarkable tribological propertieslow friction, low wear, and multiple modes of lubrication acting to lower friction and/or wear...
  31. PRESSURE ULCERS IN ELDERLY EMERGENCY DEPARTMENT PATIENTS
    Mona Baumgarten; Fiscal Year: 2001
    ..The major extrinsic factors related to the etiology of pressure ulcers are immobility, shearing, and friction. Although many of the diagnostic and therapeutic procedures that patients undergo while in the Emergency ..
  32. REDUCTION OF POLYETHYLENE WEAR IN SURGICAL IMPLANTS
    Piran Sioshansi; Fiscal Year: 1990
    ..ion implantation of biologically inert species such as nitrogen and carbon increases hardness and reduces the friction of F-75 alloy...
  33. Nano-Crystalline Ceramic Coatings for the Reduction of Sliding Resistance of Orth
    JASON E BURNS; Fiscal Year: 2013
    ..Excessive sliding resistance, which is a combination of friction and notching/binding behavior, works against tooth motion as the bracket slides along the wire into a new ..
  34. SILICONE-FREE LOW FRICTION COATING FOR SYRINGES
    PAUL VERNON; Fiscal Year: 2000
    We propose the development of an innovative low friction coating for elastomeric materials commonly used in medical devices...
  35. NANOCRYSTALLINE COATING FOR UHMWPE PROSTHESES
    FEREYDOON NAMAVAR; Fiscal Year: 1999
    ..of layer structures to produce excellent adhesion at the interface and no adherence at the surface (low friction) and demonstrate durability in bench-top testing...
  36. BIOTRIBOLOGY OF DIARTHRODIAL JOINTS
    Gerard Ateshian; Fiscal Year: 1999
    ..of articular cartilage, and to perform experiments that directly test the predictive ability of this proposed friction theory...
  37. Patient Transfer - Pressure Reducing Overlay (PtPRO)
    Jeffrey Jensen; Fiscal Year: 2003
    ..patient transfer from one supine modality to another; 2) continuous reduction of pressure, shear, and friction, which are primary contributors to the formation of pressure ulcers, and; 3) portability so the PtPRO can "travel"..
  38. SILICONE-FREE LOW FRICTION COATING FOR SYRINGES
    VINAY SAKHRANI; Fiscal Year: 2006
    ..abstract_text> ..
  39. CUTANEOUS CONTROL OF EXPLORATORY HAND MOVEMENT
    ALLAN SMITH; Fiscal Year: 2001
    ..Prehensile movements of the hand use cutaneous feedback to adjust grip forces to the weight and friction of a handled object to minimize slip on the skin...
  40. Nano-Crystalline Ceramic Coatings for the Reduction of Sliding Resistance of Orth
    JASON E BURNS; Fiscal Year: 2011
    ..Nano-crystalline IBAD ceramics will reduce friction in the couple, and more importantly, through hardening the arch wire, will eliminate the notching which occurs at ..
  41. Friction-Reducing Bandage to Prevent Skin Breakdown
    ADRIAN POLLIACK; Fiscal Year: 2003
    ..and intrinsic factors contributing to skin breakdown affecting people with disabilities, shear forces and friction are two factors known to hasten this effect...
  42. Modified Hyaluronic Acid for Extrasynovial Tendon Graft
    Chunfeng Zhao; Fiscal Year: 2006
    ..Although friction can be reduced with the application of hyaluronic acid (HA) applied to the tendon surface, its effect is ..
  43. PREDICTIVE MODELING OF SLIPS AND FALLS
    Rakie Cham; Fiscal Year: 1999
    ..More specifically, a logical regression model relating the required coefficient of friction (RCOF) and measured coefficient of friction (COF) to slips/falls probability will be developed...
  44. Development of a Magnetically Driven Heart Pump
    Kurt Dasse; Fiscal Year: 2003
    ..Our approach will feature a magnetically levitated, and thus friction-less, rotor/stator configuration, which efficiently generates flow, with minimum hemolysis...
  45. CERAMIC TIBIA FOR MOBILE BEARING KNEE
    Michael Anderson; Fiscal Year: 2007
    ..novel, ultra-low wear bearing for TKA implants by developing and wear testing of a new ceramic optimized for low friction articulation against established CoCr alloys...
  46. Cast walker to Expedite Healing of Diabetic Foot Ulcer
    Kevin Higgins; Fiscal Year: 2003
    ..and pressure reducing modalities for diabetes-related wound care; however, no scientific data exists on shear (friction) and scarce data on pressure reduction. Presently, no commercially available removable cast walker reduces shear...
  47. Non-contact ACL injury in sport--mechanisms & prevention
    Antonie van den Bogert; Fiscal Year: 2003
    ..of ACL injury during these movements, and (3) to predict the protective effect of specific modifications of shoe friction on rate of ACL injury and the associated effect on performance...
  48. SCI AND AMPUTATION PAIN PREVENTION AND TREATMENT
    Thomas Rudy; Fiscal Year: 2000
    ..the frequency, severity, and duration of pain in IWSCI through optimal wheelchair fitting and a cushioned, high-friction pushrim; and (b) reduce the progression of peripheral pathology through optimal wheelchair fitting and a ..
  49. ENHANCEMENT OF LUBRICATION FOR ARTIFICIAL CARTILAGE
    Martine LaBerge; Fiscal Year: 1992
    ..predominant phospholipids in synovial fluid) ionically attached to an elastomeric surface can be used to reduce friction and wear of cartilage in hemiarthroplasty conditions or for the repair of osteochondral defects...
  50. Prevention of Pressure Ulcers in Hip Fracture Patients
    Mona Baumgarten; Fiscal Year: 2003
    ..virtue of exposure to long periods of immobility before, during, and after surgery, and by virtue of exposure to friction and shearing injuries when being transferred to and from beds, stretchers, x-ray tables, and operating tables...
  51. Accessible Mounting and Positioning Technology
    DIANNE GOODWIN; Fiscal Year: 2006
    ..Modular components such as trays, AAC mounts, table clamps, bed clamps, floor stands, friction-based arms, and other application specific accessories expand its utility and potential in other markets, ..
  52. DEVELOPMENT OF AN ERGONOMIC MANUAL WHEELCHAIR PUSHRIM
    RONALD BONINGER; Fiscal Year: 2006
    ..surfaces create an improved contact area for gripping the handrim, and allow for specially coated high and low friction surfaces to maximize the efficiency of propulsion and braking...
  53. Development of Guidelines and Assessment Tools for Truck Ingress/Egress
    Matthew Reed; Fiscal Year: 2009
    ..e., require less friction), produce lower joint torques at the shoulder and hip, and result in lower accelerations of the body center of ..
  54. LOW FRICTION COATINGS ON GLASS AND CERAMICS
    JACQUELINE JOHNSON; Fiscal Year: 2005
    The focused session on "Low Friction Coatings on Glass and Ceramics" will be held as part of the 107th Annual Meeting and Exposition of the American Ceramic Society in Baltimore MD. The dates of the meeting are April 10th - 13th, 2005...
  55. Boron plasma-treatment of CoCrMo orthopedic implants
    C KLEPPER; Fiscal Year: 2004
    ..RBS) to study the composition of the coating and the interlayer as a function of depth, as well as wear and friction characterization, with emphasis on mass loss from the UHMWPE counter surface in simulations of hip and knee joint ..
  56. CASE CONTROL STUDY OF FOOTWEAR AND FALLS IN OLDER ADULTS
    Thomas Koepsell; Fiscal Year: 1999
    ..that type and biomechanics of footwear are related to falling; specifically, increased fall risk will relate to friction and shoe structure/deformability...
  57. Molecular Reading Head for Single-Molecule DNA sequencin
    Stuart Lindsay; Fiscal Year: 2006
    ..Fluctuations in molecular friction as the ring passes each base are recorded as deflections of the AFM cantilever...
  58. LOW FRICTION BACTERICIDAL SILVER COATED CATHETERS
    Piran Sioshansi; Fiscal Year: 1991
    ..a silver coating which can be deposited on the catheter to transform the tacky surface into a lubricous, low friction one. The particular emphasis during the research will be on angioplasty (PTCA) catheters...
  59. DEVELOPMENT OF AN ERGONOMIC MANUAL WHEELCHAIR PUSHRIM
    RONALD BONINGER; Fiscal Year: 2001
    ..The design increases the surface area available for gripping and selectively coats surfaces with high friction materials...
  60. A DURABLE, LOAD-BEARING, MUSCLE-TO-PROTHESIS COUPLING
    David Melvin; Fiscal Year: 2000
    ..That is the MyoCoupler(TM). Effective force-transfer is obtainable with realistic friction coefficients and physiologic tissue pressures...
  61. Coal Bumps Prediction in Longwall Coal Mines
    SYD PENG; Fiscal Year: 2009
    ..In the first stage, a rock/coal interface friction model will be developed since the characteristics of rock/coal interface can be the prime cause of coal bumps in ..
  62. NOVEL CORROSION RESISTANT BIOACTIVE SURGICAL IMPLANTS
    ZORAN MINEVSKI; Fiscal Year: 2000
    ..g. low friction, excellent antiwear properties and good adhesion and (3) similar or lower production costs due to minimal needs ..
  63. Synthesis and Characterization of Leukopolymersomes
    JAMES SILAS; Fiscal Year: 2004
    ..The first aim is to create a polymer vesicle that will roll, or undergo a unique type of dynamic friction that is characteristic of selectin binding between neutrophils and endothelium...
  64. ULTRA-LOW FRICTION, BIOCOMPATIBLE COATING FOR GUIDEWIRES
    Piran Sioshansi; Fiscal Year: 1992
    ..05) coefficient of friction film of silicone oil on stainless steel guidewires...
  65. ADVANCED OPHTHALMIC SLITTING KNIVES
    CHRIS KOVACH; Fiscal Year: 1999
    ..organizations list no standard quantitative technique to assess the relative efficacy of different coatings as friction reducing, wear resistant materials for ophthalmic applications...