Generally what are output voltages of solar inverter for the grid connected system? Because we have to connect it to grid so for that we have to have some specific voltages! I want learn about Grid Connected solar Power please suggest me any site for this! Thanks a lot. .

What type of welding is suitable for aircraft? (gas welding, arc,spot welding)? Otherwise is it a molded one?

From Discovery News - Top Stories:

The deep ocean has many secrets, and scientists aboard the Okeanos Explorer just discovered a big one - an enormous volcano looming 7,000 feet below the ocean's surface off the coast of Indonesia. Exposing Kawio Barat volcano is the first major

From Boing Boing:

David ! of the Wondermark webtoon sez, "To make my comics, I collect all sorts of weird old books and mine them for images. I found these photos in a recent acquisition -- an attempt at a steam-powered flying machine from 1893! The entire article is very long, but

From ABC News International:

An unidentified flying object (UFO) forced Xiaoshan Airport in Hangzhou, China to cease operations on July 7. A flight crew preparing for descent first detected the object around 8:40 p.m. and notified the air traffic control department. Aviation a

From NPR Topics: Science:

A minor earthquake shook residents awake in the Washington, D.C., area early Friday. The quake hit at 5:04 a.m. EDT and had a magnitude of 3.6. It was centered in the area around Rockville, Md., said Randy Baldwin, a physicist with U.S. Geological Surve

From NPR Topics: Science:

Planetary scientists are whittling down a list of potential missions to other worlds. And just about everything under the sun is on the table. "The solar system is completely wide open," says one astronomer. "Almost anywhere we go, I'm sure we would learn

Lean systems save money and boost quality and efficiency, but an expert in Quality Digest cautions that some redundancy is essential. He cites acute shortages and supply chain disruptions caused by flight cancellations resulting from Iceland's volcanic activity. He calls for duplication of supplier

From BBC News - Technology:

Marc Cieslak joins the Bridgestone Eco Rally from Brighton to London, which showcases the latest in environmentally friendly car manufacturing.

Watch the video

From The Engineer - News:

Researchers have demonstrated a regeneration technique that could use the waste steam generated by many facilities that burn fossil fuels to regenerate materials containing amines used for carbon capture.

Read the whole article

Dear ALL

I am a Protection Engineer with 10 years exp. I am planning to prepare a handbook for Protection Engineers. I would like to receive your valuable suggestions and guidence. If you face any problem related to testing & commissioning please share with the solutions. That can be includ

Last night my dog, a German Shepherd, killed his third skunk in as many years. He must have good hunting instincts, because he has always been able to make a kill without getting sprayed directly. Normally he barks if there is anything near our (his) yard, a cat, another dog, or a person. But in the

Habits are easy to form and hard to break. That is a phrase everyone has heard and understands. In fact just about everything we do on a day to day basis can be regarded as habit. Habits can be good or bad. Brushing your teeth every day is a good habit. Taking illegal drugs is a bad habit; no arg

Has anyone been able to make a real comparison between two cars; one with a conventional gas engine and one with a hybrid or all electric plant? I don't know the cost of the latest batteries, but when you factor in the cost of replacing a complete set of batteries, I wonder what the driving cost per

Dear sir

1)I am interested to know the concept and method of calculation carried out for co-ordinating overcurrent relays in a substation and anybody in this forum please send example calculation to understand better.

2)also explain how to select the CT ratio and relay current sett

I wish to obtain information covering Simulink to model a P+I and P+I+D control functions. My knowledge of Simulink is questionable so if anyone has such models I should be very happy to receive them.

Every test engineer, design engineer, and manager must address a unique mix of challenges. At what stage do you have the most difficulty? Why? How do you distribute the responsibilities? Can you get designers to create products that you can test? How easily can you get management to approve capital

The planet seems to be consumed by disasters these days, natural and man-made. From massive oil spills in the Gulf of Mexico to earthquakes to erupting volcanoes. Yet there's another potential disaster looming in either the frozen food section of your local mega-mart, or even the residential model r

Dear SIR/MADAM

I have a question in wall thickness calculation as per ASME B31.8, Is it neccessary to consider mill tolerance to calculated wall thickness or it is considered in F factor?

Testing optics often requires an extremely fine point source of light.

Efforts to build such a source using fine fiber optics have proven cumbersome and less than effective.

Can anyone supply me with a schematic and BOM for a device that can simulate a bright star's light?

Thanks