Hip replacements have a limited life before they too need replacing. This is known in the medical field as revision surgery and it is a source of much pain and inconvenience for the patient. Revision surgery is most often because the underlying bone has deteriorated. Bone needs stress to grow and to maintain strength, yet current hip replacement implants are too stiff - they constrain the affixed bone and prevent it from stretching. The bone around the implant starts to deteriorate and the bond between bone and implant fails.
Titanium, used in orthopaedic implants because it is strong, lightweight and biocompatible, transforms at temperatures above 883°C. The atoms rearrange from a densely-packed structure (called the alpha phase) to one that is loosely-packed (beta phase). Both alpha and beta phases are strong, but the beta phase is half as stiff and has elastic properties closer to that of bone. By adding elements such as tin, niobium and zirconium, our titanium alloy keeps its flexible beta structure at room temperature. If the alloy is then re-heated to 450°C, some alpha phase re-emerges, complicating the microstructure. This makes it more difficult for cracks to progress through the metal, making it less susceptible to fatigue failure. If the amount of alpha is controlled, a metal with good fatigue properties and low-stiffness is made.
To further reduce the stiffness of the implant and match it to that of bone, we use flexible scaffold structures. The scaffolding also allows the bone to grow into the implant, creating a strong bond. These complicated scaffolds are built from thin layers of titanium powder that are melted with a laser, then cooled to solidify. This manufacturing method is called Selective Laser Melting (SLM) and it is like 3D printing. Because SLM is good at producing one-off items, customised implants are possible; the patient’s CAT or MRI scans can be combined with Computer Aided Design to ensure a perfect fit.
My research at the University of Western Australia uses these new materials and advanced manufacturing techniques to try to overcome the main reason why orthopaedic implants fail. If successful, this work will help lead to more durable implants, reducing the need for revision surgery and allowing orthopaedic implants to be used on younger adult patients.
This video was created with friends and family for Gonzolabs "Dance Your Ph.D" 2011 Contest. It illustrates a central part of my research: the effect of the titanium alloy microstructure. The video was created using 2200 photographs because we didn't have a video camera, but also (and more importantly) because stop motion, even though tedious to shoot, is fun.
The music is "Mischa" by unsigned Perth indi-electropop outfit The Transients. Hear more of their music at thetransients.net
really. it was just great.
music used with permission:
le loup - i had a dream i died
cameras: mostly iphone, some hv30, and some GoPro for the roller coaster stuff.
Frank Moore's Cherotic All-Star Band
A benefit for luver.com
June 26, 2004
We closed an extremely long night of extreme hard core punk bands, including The legendary FEEDERZ [who were my backup band in the eighties] and FLUFF GRRL at THE SLAUGHTERHOUSE, the underground illegal hard-core punk venue in Oakland. My band included representatives of the five other bands that night! This is how I celebrate my birthdays!
A dance video done to the music "Alive" by Freeplaymusic. The model had an affinity for stars so it seems natural to cover the model in shiny silver stars. The model is one of my favorites, Xlcrmoon.
This is my second time shooting video with my Canon, it was an experimental film to test the abilities of the camera and in splicing together footage. She was originally dancing to random music on her phone, the footage was spliced together to sync with the music.
Shot in 1996 on Black and White Super 8mm film. All edited manually by cutting and taping the film together. Done for my film class at Scottsdale Community College.
All camera movements were shot handheld with my on rollerblades.
Music from The Swing Kids Soundtrack, Life Goes To A Party/Jumpin' At The Woodside.
Dancers: Paul Maranto & Janet Tolifson
Seleção de Videos que relacionam artisticamente-graficamente (escrita, desenho, traçado) o corpo, a paisagem, o movimento, o espaço e o tempo.
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Select Videos that relate artistically-graphically (writing, drawing, tracing) the body, landscape, motion, space and time.
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