Fatigue is a common cause of highway tractor trailer accidents. About one-quarter of commercial roadway accidents are due to drivers falling asleep at the wheel. That stark reality in mind, inventors in Denmark developed a dash-mounted alarm system that detects when a driver is about to fall asleep

A recent article describes a machine-tool manufacturer's use of step motors and microstepping drives in place of continuous motors, making note of how quietly the machines run. What's your experience with smooth-performing microstepping drives and step motors, and their ability to replace continuous

Are agencies assuring the safety of public drinking water? It has been said some fell down on the job both in establishing criteria for identifying contaminants of greatest public health concern, and in testing unregulated contaminants in ways that provide useful data for making regulatory decisions

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From Gizmodo:

The Pentagon's brand-spankin-new fleet of F-35 jets did not come cheap-costing an estimated $1 trillion to build and operate. So why are they sitting on tarmac instead of patrolling the skies?

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From BBC News - Science & Environment:

In travelling out as far as Jupiter, Nasa's $1.1bn Juno mission will venture where no solar-powered spacecraft has dared go before.

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I think I've finally managed to out-smug my Seattle neighbors.

Parked directly in front of a garage that contains my old gas-guzzling Mopar is the new Prius Plug-In Hybrid. I have one of just 160 or so they are using in testing this year, but they'll start showing up in dealderships early next ye

In distance protection what is 'ECHO' protection for POTT?Plz, expain in terms of fault point with one breaker open.

Also, what is the influence of weak infeed in POTT echo scheme?

Rust Remover.

I just got al OLD wood stove that is all rusted.

It isnt flaky rust, just a rust surface that is HARD sscraping or even a wire brush won't remove this stuff.

I remember from the old days something called naval jelly.

But that from a LONG time ago.

I want to clean this up as much a

I am in need of a simple mechanism for indicating the winner in toy car races. I'll have a wooden track about 40" long, with two cars racing side by side in shallow grooves. I just need a way to show which one wins. I want something mechanical since these kids don't have much experience with electri

hi,

i have the fan cooling relays VRT600 & T154 from s.r.l techsys protection, italy ,for forced cooling of dry type transformers .i do not know exactly how to operate these relays and set various parameters for them i.e. setpoints because the provide operted manual is in italian which i do not

hi,

during hot weather conditions, our line voltage drops significantly ( rated line voltage = 11Kv ) and enters into trip region (10.5KV ) . i had come to know that a diesel generator operated in parallel with mains supply can improve this undervoltage and bring it back to the normal value . can s

hi,

i want to know that what should be the %age setting of the negative sequence value for a given equipment i.e. motor, generator e.t.c. kindly give a refrence e.g IEC,IEEE etc for your statement so that i may use that reference in my documentation.also i want to know that if my line voltages are

hi everyone,

i want to know the rule for selecting an MCB/MCCB for a given load i.e. of what rating MCB/MCCB should we select for a given load. say my load is 34 A , then of what exact rating MCB/MCCB should i use? . i know that the selected MCB/MCCB rating should be higher than the load current .

I have a video receiver which I have taken apart. I have noticed that there is a variable resistor inside for tuning it. It has 3 wires going to it. If I changed this resistor for one with a different range of values, would it be possible to pick up a much wider range of frequencies such as FM radio

Please don't tell me to call an electrician. I'm not one, but I can handle wiring, and I know how not to get electrocuted.

Half my kitchen went out this morning. It's protected by a GFI breaker on the main panel. Outlets are good. I ran the wires to a known working GFI in the panel and it seems to

what is definite time relay...?? i have seen the relay in tat sme time setting is there... for what these time setting is mentioned...??? psl explain in detail....

From Discovery News - Top Stories:

An 11-year-old girl was struck by lightning on a bright, clear day. How does that happen?

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From INHABITAT:

A solar energy system that doesn't require sunlight is almost as bizarre as a tidal power system that doesn't use water - however that's exactly what researchers at MIT have cooked up. The team just unveiled a new photovoltaic energy conversion system that can be powered

From INHABITAT:

In a new study released this week, it was revealed that among the 1.2 million residents living in parts of Appalachia, an additional 60,000 cases of cancer are directly linked to mountaintop removal mining, a practice that occurs most commonly in West Virginia's Appalachi