Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. Space Industry and Business News .




TECH SPACE
What's between a slip and a slide?
by Staff Writers
Sheffield UK (SPX) Apr 06, 2013


File image courtesy AFP.

Working with the International Tennis Federation and colleagues at the University of Exeter, the team from the University of Sheffield's Faculty of Engineering developed a test machine which applies large forces to a surface to mimic the impact of elite tennis players on tennis courts. This impact can be up to four times the bodyweight of a player.

They used the machine to measure the friction on an acrylic (hard) court in dry conditions and two artificial clay court surfaces in both wet and dry conditions.

The team found that on clay surfaces the size of the sand particles in the clay affect the friction, particularly when the surface is wet.

With smaller particles, the surface becomes more slippery as it gets wetter, as would be expected. However, with larger particles, the player's grip can actually increase on a wet court, making sliding more difficult.

The research also found why some players are able to slide across acrylic hard courts, a technique that has mostly been reserved for clay.

Lead researcher, Dr James Clarke, from Sheffield's Department of Mechanical Engineering, explains: "We found that that if a player is strong and daring enough to apply a high enough force at the right angle, then it's actually easier to start sliding on a hard court than a clay court."

Insufficient, or too much, shoe/surface friction may influence the risk of injury in tennis. The extreme athleticism of today's top players has increased the necessity for playing surfaces with the appropriate level of friction.

Only last year Novak Djokovic and Rafael Nadal threatened to boycott the Madrid Masters should the tournament continue to be played on a new blue clay surface. They complained that it was too slippery, and consequently unsafe.

Principal Investigator Dr Matt Carre, from the Human Interactions Group in the Department of Mechanical Engineering, University of Sheffield says: "The level of friction between the shoe and surface clearly affects the style of play.

"Understanding what was causes this level of friction can aid in standardising the quality of courts that will ultimately help the players perform better."

The research was funded by the Engineering and Physical Sciences Research Council (EPSRC) and is being continued with support from the International Tennis Federation.

The next step is to link the results from the machine to how players themselves perceive the surface. The aim is to create standards which can be applied internationally to competition surfaces to better inform players about the court.

.


Related Links
University of Sheffield
Space Technology News - Applications and Research






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





TECH SPACE
Light may recast copper as chemical industry 'holy grail'
Ann Arbor MI (SPX) Apr 06, 2013
Wouldn't it be convenient if you could reverse the rusting of your car by shining a bright light on it? It turns out that this concept works for undoing oxidation on copper nanoparticles, and it could lead to an environmentally friendly production process for an important industrial chemical, University of Michigan engineers have discovered. "We report a new physical phenomenon that has po ... read more


TECH SPACE
What's between a slip and a slide?

Light may recast copper as chemical industry 'holy grail'

New camera system creates high-resolution 3-D images from up to a kilometer away

Theory and practice key to optimized broadband, low-loss optical metamaterials

TECH SPACE
Northrop Grumman Awarded U.S. Navy Contract to Upgrade, Enhance NGC2P Tactical Data Link Processor

Soldiers and Families Can Suffer Negative Effects from Modern Communication Technologies

DARPA Seeks More Robust Military Wireless Networks

DoD Selects Northrop Grumman for Joint Command and Control System

TECH SPACE
Future Looks Bright for Private US Space Ventures

Europe's next ATV resupply spacecraft enters final preparatio?ns for its Ariane 5 launch

ILS Proton Launches Satmex 8 Satellite for Satmex

When quality counts: Arianespace reaffirms its North American market presence

TECH SPACE
China preps civilian use of GPS system

GPS device could stem bike thefts

Apple patent shows pen with GPS, phone

Ground system improves satellite navigation precision

TECH SPACE
Fasten seatbelts for bumpier flights: climate study

Hong Kong airbridge collapse rips off plane door

Third F-35B For United Kingdom Makes First Flight

Eurocopter vies for big-ticket Polish chopper deal

TECH SPACE
World Record Silicon-based Millimeter-wave Power Amplifiers

A giant step toward miniaturization

ORNL microscopy uncovers "dancing" silicon atoms in graphene

A mighty wind

TECH SPACE
First Light for ISERV Pathfinder, Space Station's Newest 'Eye' on Earth

Watching over you

New Live Bi-ocular Animations of Two Oceans Now Available

NASA Flies Radar South on Wide-Ranging Scientific Expedition

TECH SPACE
Albania to hold referendum on waste imports

Smog-eating pavement on greenest street in America

Latin America looks to earn from e-waste

Russia seeks Baltic pollution partnerships




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement