I’ll demonstrate how to build a simple magnetic optical mount for a cat toy (laser pointer). Though it is simple—that is, there aren’t any fine tuning mechanisms one would find on an optical bench—it is, nonetheless, inexpensive and flexible enough to use for simple optical experiments such as demonstrating the Tyndall effect
I used a magnetic chip clip to clamp the laser pointer switch (a press switch) in the on position and attach the laser pointer to the Erector set mount.
High-powered microwave devices are designed to transfer energy to targets via ultra-high-frequency radio waves, in civil applications, such as radar and communication systems, heating and current drive of plasmas in fusion devices, and acceleration in high-energy linear colliders.
They can also be used for military purpose in directed-energy weapons or missile guidance systems.
Gas turbines are used for the production of electricity and in aircraft engines and they are sprayed with a surface coating to increase their lifespan.
The coating consists of two layers, one of metal to protect against oxidation and corrosion, and one ceramic to give thermal insulation. The structure of the coating varies greatly, consisting of pores and cracks of different sizes. It is these cracks and pores that largely determine the efficiency of the thermal insulation and the length of the coating's life-span.
Some of the most prized violins in the world were crafted in the Italian workshops of Amati, Stradivari, and Guarneri in the 17th and 18th centuries. They produced increasingly powerful instruments in the renaissance and baroque musical eras.
This Cremonese period is now considered the golden age of violin-making.
A nonflammable electrolyte may bring us safer lithium-ion batteries.
“With current lithium batteries safety is engineered through the battery management system,” says Lawrence Berkeley National Laboratory researcher Nitash Balsara, co-founder of Blue Current, a startup company to further develop their invention. “Although they are generally considered safe, you still have an electrolyte in the battery that is flammable, and every so often something might go wrong. We want to take that anxiety out of the battery.”
Indian swords don't get a lot of cultural respect compared to the works of Spain or Japan but a new study used two different approaches to analyze a shamsheer, a 75-centimeter-long sword from the Wallace Collection in London, and found that it was master craftsmanship
The study, led by Eliza Barzagli of the Institute for Complex Systems and the University of Florence in Italy, used metallography and neutron diffraction to test the differences and complementarities of the two techniques. The shamsheer was made in India in the late eighteenth or early nineteenth century and is of Persian origin. The base design spread across Asia and eventually gave rise to the family of similar weapons called scimitars that were forged in various Southeast Asian countries.
The world of single atoms and molecules may seem to be governed by chaotic fluctuations, but a team of researchers has found that the spontaneous formation of Turing patterns - responsible for the irregular yet periodic shapes of the stripes on zebras' bodies - can not only occur on the small scale, but can also be used for potentially very interesting applications.
By: Marsha Lewis, Inside Science
(Inside Science TV) – They may look flimsy, but the materials printed with 3-D printing technology are one-of-a-kind, light-weight and super-strong.
Materials engineers at LLNL have created a material with a special 3-D printer that mixes hard metal, tough ceramics and flexible plastics.
“It can hold more than 100,000-times its own weight. In fact, even more than that," said Chris Spadaccini, a materials engineer at Lawrence Livermore National Laboratory in California.
“One of the benefits of this methodology is the ability to work with a wide range of materials," said Josh Kuntz, a materials engineer at LLNL.
My wife bought me a “selfie-stick
” (sometimes called Wand of Narcissus
), which is ironic since I so rarely actually take selfies. But, once I took a look at its simplicity of design, I couldn’t leave well enough alone and decided to create the “Super Selfie-Stick.”
At first I tried attaching a camera mount on the end of a golf ball retriever.
Spider-Man's breakfasts must be unreal levels of eggs. warriorpoet
By Mark Lorch, University of Hull
While stuck in a hotel room I got sucked into watching the 2002 "Spider-Man" movie. And it struck me that Peter Parker must have an enormously high-protein diet to generate all that spider silk he goes through. So being the geek that I am, I wondered what his protein consumption has to be to sustain his villain-beating lifestyle.