Play Doh fingers fool fingerprint readers
Doh! er, Play Doh! “Fingerprint scanning devices often use basic technology, such as an optical camera that take pictures of fingerprints which are then “read” by a computer. In order to assess how vulnerable the scanners are to spoofing, Schuckers and her research team made casts from live fingers using dental materials and used Play-Doh to create molds. They also assembled a collection of cadaver fingers. In the laboratory, the researchers then systematically tested more than 60 of the faked samples. The results were a 90 percent false verification rate.” [via] Link.
Print out a working plastic gun, or a self contained puzzle…Sascha from wmmna writes “The design products-department at the Royal College in London teamed up with a company called 3D Systems to get their hands on some state-of-the-art rapid-prototyping equipment. The brief was to create projects that are not prototypes but products that couldn’t have been made with any other technique. The results were quite stunning and point towards a future of manufacturing that seems to be swiftly approaching…” 
We’re fans of PVC here at MAKE, from 
Peter is looking for some Makers out there, he writes “Basically, the folks at National Instruments have added DSP (digital signal processing, useful for lots of audio applications — both industrial and musical), to LabVIEW, their high-end development platform for creating test / measurement / control applications. Here’s the cool part: they designed a free synth (as in musical synth) to run on the platform. Somewhere out there, there’s a scientist or engineer who’s going to love fiddling with this thing. It’s electronic music for Dr. Bunsen Honeydew. Know anyone in those communities (blogosphere or printosphere) who might be interested in this?” 
Ever wonder why some of the ice cubes in your ice tray have little spikes? Here’s why and here’s how to make your own spikey ice cubes “With ideal conditions (distilled water, a fan promoting evaporation and rapid cooling, -7 degree C temperature, an empty freezer) about half the cubes in an ice-cube tray will form spikes” [
Interesting and sorta gross “epiSkin jewelry extends biological identity by combining technology and design into a new decorative body surface. This project is an exploration into the decorative technological control over biology to create an artifact which is a hybrid of both. Cultured in a lab, this biological jewelry is made of epithelia cells which grow to create an artificial skin. The cells are grown into custom designed forms, controlled by the artist. The cells are incubated for a period of time, following which they are stained with a custom dye. The skin is then visibly sealed into a wearable object.” [
Tips for getting rid of the annoying hum – “Of all the annoyances that can afflict any audio/video home theater or even a simple stereo installation, the notorious “ground loop” may well be the most difficult and persistent one to track down and eliminate. A “ground loop” is caused by the difference in electrical potential at different grounding points in an audio/video system. (All the grounds in an A/V system should ideally be at “0” potential.) A ground loop typically adds a loud low-frequency hum or buzz as soon as you plug in any of various audio or video components, including subwoofers, cable-TV outboard boxes, satellite-TV feeds, TV displays, amplifiers, A/V receivers or turntables. The buzz/hum is a byproduct of the multiple power supply cables and a ground voltage differential within your system and its network of interconnecting cables.” 
