Modulation of a Fan

our gas collection and treatment system is equiped with a centrifugal fan. when the system resistance is reduced, the flow rate reduces instead of increasing. we want the flow rate to be constant independent of the system load.

also, when the system load decreases, the quantity of ava

Living, Breathing Lung Tissue Created in the Lab

From TG Daily:

A Yale University team has successfully implanted laboratory-made lung tissue into rats - which were then able to use it to breathe. The Yale researchers took adult rat lungs and removed their existing cellular innards, while keeping the external cell structure an

Crazy Video: Super-Hydrophobic Substances

From mental_floss Blog:

Today's weird science: Dr. Neil Shirtcliffe shows off substances that repel water in very surprising ways. It's a little hard to describe — basically, imagine a coating that prevents water from adhering to something. And I mean water will not stick

Plastic Bags Into Power?

From Discovery News - Top Stories:

Rather than languishing in landfills or littering roadsides, plastic bags could make their way into useful products like toner, lubricants, or rechargeable cell phone or laptop batteries, if new research becomes commercialized. Plastic recyclin

Pushing Safer Alternatives

From Chemical & Engineering News: Latest News:

California regulators are taking action to step up pressure on manufacturers to replace toxic chemicals in consumer products with safer alternatives. The state regulation proposed on June 23 would require manufacturers to assess whe

Extracted Teeth Could Stock Stem Cell Banks

From Discovery News - Top Stories:

Scientists have found a new and relatively accessible supply line for stem cells that can grow into any type of cell in the human body -- extracted teeth. Like cells from embryos, the soft living tissue from inside teeth can be induced to becom

Oceans on Venus Might Have Been Habitable

From SPACE.com:

Venus, currently one of the most inhospitable places in the solar system, may once have had an ample supply of water - possibly even oceans - and been a potentially habitable place when it was young, a new study suggests. The finding comes from the European Space

Continuous Recording

I'm looking for some advice. The Oregon Caves National Monument has asked me to install an antique wood wall telephone in their antique telephone booth located inside the lodge. They want to tourists to be able to listen to a recording talking about the Caves, Monument, Lodge etc. whenever the recei

Basic Wind Speed

Salaam, I need to know how I can come to know about design wind speed for a country. Now I m doing tower design in qatar. HOw I know the wind speed of qatar. I need the source so that I can use it for the whole world. Thanks a lot.

Control Through GPRS

can i send a control interlock signals through GPRS from reservoirs level transmitter to interlock with my pumping station (distance about 8 km far from pumping station)

is it save ?and reliable ?

I'm using scada system

thanks a lot

Earth Fault Tripping

Hello all. I'll be very grateful if you could answer my queries and clear my concepts in the process.

I work in an oil & gas plant as a Trainee Electrical engineer. The power source that we use is a Caterpillar's G3508 (SITA) 630KVA/505kW natural gas engine which runs at only 40-50% load,