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Engineering

Engineering is an art and profession devoted to designing, constructing, and operating the structures, machines, and other devices of industry and everyday life.

5,839 Questions

What is a Kahn tube?

Fazlur Rhaman Khan is an architect and structural engineer. He was regarded as the "father of tubular design for highrises". The influence of Khan's tube structure design can be seen in numerous buildings built since the 1960's.

Where in the UK is Strassford University?

Strassford University is a fake "Diploma Mill", their degrees are not valid in the UK or anywhere else.

Why is so much technology being held back keeping us in a new dark age?

To major in Artificial intelligence which is better Computer science or computer engineering?

I would say for starters that computer science would do more good for you because artificial intelligence is mostly software producing along with intergrated hardware which will need to be programed.

If an object was 1 mile high how long would it take to fall to the earth if it weighed 100 pounds and or 200 pounds?

Time taken to reach to earth is independent of weight, so it will be the same for both objects.

The equation you're looking for is d = 1/2 at2, where d is the initial height and a is the acceleration due to gravity (32 feet per second per second if you're going to insist on using English units). t is the quantity you're looking for ("how long").

What are the slatted fences along the beach called?

This wooden slatted fencing is called a sand fence. Its function is similar to a snow fence used along highways in the north to control drifting snow. The sand fences provide:

  • Dune erosion maintenance
  • Coastline preservation
  • Vegetation preservation improving natural erosion control
  • Preserve and mark out sensitive areas and preserve habitat ecology
  • Control of the blowing sand (or snow) across highways or airport runways

What is part load in internal combustion engine?

"Part Load" is short for partial load.

"Load" is when the engine is doing work. Whatever work the engine is doing places a "load" on the engine which resists the engine's turning motion and slows the engine down so it requires more throttle to maintain speed.

"Partial load" is when the engine is doing work that would stall the engine at idle, but does not require full throttle, just partial throttle.

A good example would be a car traveling at highway speed or up a slight grade.

Does London underground trains have got engineering works today?

yes, it is a constant process to maintain and also expand the network so engineering is very prevalent They still use engineer/drivers on the trains

Why use 1030 MHz and 1090 MHz in secondary radar or why use L band?

Tyco Electronics Announces M/A-COM 1,000 Watt Bipolar Transistor for Avionics Applications

Transistor Ideally Suited for Tactical Air Navigation System and Similar Short Pulse Applications

LOWELL, Mass. - May 8, 2007 - Tyco Electronics today announced the M/A-COM MAPRST1030-1KS, a new 1,000 W peak, class C bipolar transistor designed for 1030 MHz pulsed avionics applications. The transistor is ideally suited to operate in IFF/TACAN (tactical air navigation system) or similar short pulse formats and features a minimum gain of 8.0 dB (>8.6 dB typical) with 45% minimum collector efficiency (>50% typical) on a 50Vdc supply.

"The one thousand watt power rating on this new transistor can greatly enhance the range capabilities of new avionics systems," said Andrew Tse, product line manager, Tyco Electronics M/A-COM Radar and Avionics. "Additionally the unique power capability of the product will contribute to more compact system designs, as one device can replace a pair of devices in the final amplifier circuit architecture."

Designed for maximum durability, the M/A-COM MAPRST1w030-1KS is housed in a hermetic, ceramic/metal package for high reliability that can tolerate a 10:1 load mismatch without damage or loss in performance. M/A-COM brand driver stages for the MAPRST1030-1KS are also available, including the MRF10005, MRF10031 and MRF10150.

Pricing and Availability

The M/A-COM MAPRST1030-1KS is priced at $393 USD each in production quantities of hundreds. Pricing is subject to change. Contact Tyco Electronics' M/A-COM products domestic and international sales channels for price and delivery quotes. Datasheets and supporting technical documents are available online at http://www.macom.com.

ABOUT TYCO ELECTRONICS

Tyco Electronics, currently a business segment of Tyco International Ltd., is a leading global provider of engineered electronic components, network solutions and wireless systems, with 2006 sales of US$12.7 billion to customers in 150 countries. Tyco Electronics designs, manufactures and markets products for customers in industries from automotive, appliances and aerospace and defense to telecommunications, computers and consumer electronics. With over 8,000 engineers and worldwide manufacturing, sales and customer service capabilities, Tyco Electronics' commitment is its customers' advantage. More information on Tyco Electronics can be found at www.tycoelectronics.com.

o M/A-COM, the TE logo and Tyco Electronics are trademarks.

oOther products, logos and Company names mentioned herein may be trademarks of their respective owners.

For sales information, please contact:

M/A-COM, Inc.

1011 Pawtucket Blvd.

Lowell, MA 01853

Americas -- 1-800-366-2266

Europe/Middle East/Africa -- +44 1908-574-200

Asia/Pacific -- 81-44-844-8296

Product Communications:

Pat Hindle

978-442-4825

hindlep@tycoelectronics.com

Contacts:

Marketing:

Pat Hindle

USA

Phone: 978-442-4825

E-mail this person

---- Company Information:

Name: Tyco Electronics Corp.

Address: P.O. Box 3608

City: Harrisburg

State: PA

ZIP: 17105-3608

Country: USA

Phone: 800-522-6752

http://www.tycoelectronics.com

Formula for bulk modulus of volume of elasticity?

K(bulk modulus of elasticity)=-{[Pressure x volume]/change in volume}

What is the different between PS and bhp?

PS is the abbreviation of horse strength in German and is no longer used as a standard of measurement. and bhp is brake horse power or crank shaft horse power. also 1 PS is not the same as 1 bhp since those crazy Germans decided that they wanted to be different

How do you build a trolley car?

If you're building a small trolley car (or tram), get a model vehicle kit or a model railroader's kit. And they can be scratch built with incredible results. But if you want to build a "real" trolley car, and it's "full sized" for serious operation, it may be cheaper to buy a used one somewhere and fix it up. Even that (the fixing) could be horrendously expensive. Just ask the guys in Denver working on their project trolley. But, if you want to build one from scratch, you'll have your hands full. Very full. Ever build a railroad car? It's the same thing multiplied by a factor of ten because instead of wheels with axles, you'll be mounting traction motors under the trolley. (Trolley, by the way, is the little thingie on the end of the pole on top of the car that picks up the power from the wire.) The traction motors are built directly onto the axles of the wheels, and are just big (!) electric motors that weigh tons. You'll need some switchgear to control the speed and direction of the machine, too. This is gonna be a project and a half. You may be able to adapt something off a light rail vehicle, but it's gonna take some uptown engineering. If this sounds like you, go for it. You'll need contacts. A number of urban settings still have a trolley line working. Start searching the web. Whether or not they have old equipment for sale or not is something that each one would have to be asked individually, probably. So ask. If they don't have any, ask if they know who might. There are a ton of trolley systems operated in urban areas overseas. Can you travel? Bring a trolley back on a cargo ship? Anything you get you'll have to move. Even if you get it in Canada. (There are trolley systems there.) There are many rail historical societies across the U.S. Some are devoted to local urban rail systems, the trolley crowd. Find some and look at what they're doing. Your best bet is still to look around in the various large urban settings that had streetcar lines and see if any of the old coaches are lying around somewhere. There are still some about, but they'll be tough to find (if they haven't been turned into diners and such). You can probably get one for a song, but you'll have to move it. And they weigh many tons. (How do you think they maintain traction with a steel wheel meeting a steel track in a tiny surface area? Weight. Tons of it. That's why locomotives and trains like this are called traction engines....) Oh, and notice that none of this addresses how you'll operate the thing without tracks to run on or overhead wires to power up the trolley. A few links are provided to get you started. Lots of model railroad clubs have information on the full-sized equipments. And there are lots of them around. Start there. Good luck.

How do you call someone with someone else's number?

You can't. Doing so would require changing your phone's number to that of the 'someone else', which cannot be done unless you first remove it from their phone.

How many robots do you use every day?

Toaster, toilet? ,sink? , cars, TV? ,lighting? ,iPods , computers

All the ones with a ? Mark are the ones that I don't know if they are a robot at all

Can you weld a broken key?

You can, but the heat will likely distort it, making it either not fit into the lock, or make it unable to trip the tumblers properly.

What is last mile solution mean?

The last leg of providing connectivity from a PSTN operator, ISP owner or Cable TV operator to a customer. Also called "First Mile" from subscriber point of view. Traditionally it is done by copper wires, you may find that connects your old telephone set to nearest telephone exchange. Copper wires carry analog signals generated by telephone equipment, including fax machines. Analog technology is by nature a less precise signaling technology than digital technology. Increasing demand for information access it became a big question to reach the unreachable.

Most subscribers, however, log on to this network through copper lines with limited capacity. This creates a bottleneck for advancing technologies that increasingly require greater bandwidth. Last-mile technology represents a major remaining challenge because the cost of providing high-bandwidth services to individual subscribers in remote areas can be higher than the service provider would like. Laying wire and fiber optic cables is an expensive undertaking that can be environmentally demanding and require high maintenance. Wireless networks will eventually provide the solution. Existing last-mile solutions are:

* Plain Old Telephone Systems (POTS), fixed copper wire.

* ISDN, a somewhat faster technology than regular phone service. Not so popular.

* Digital Subscriber Line (DSL) (or ADSL) over existing telephone twisted pair lines. very popular

* cable and the Cable modem, for data, using the same installed coaxial cable that already is used for television

* wireless (WLL, Wi-fi, Wi-Max) and including satellite services such as Direct TV * Optical fiber and its transmission technologies, therefore FTTH/FTTB (fiber to the home/Fiber to the Building).

:By Aminul Hassan

Telecom Engr., Bangladesh.

aminul_h@yahoo.com

What are Nickel-metal hydride batteries used in?

the electric engines of hybrid cars. that's where the hybrid engine is getting its power from.

What has to be interchange in order to reverse the direction of rotation of shunt generator?

the direction of the rotation of dc shunt generator could be changed only by changing the direction of rotation of the prime mover

What minimum information should be provided when describing an arc welding machine?

Power supply (Single or Three Phase /AC or DC)

Input Voltage frequency

Input power capacity

Output current range

No load voltage

Peak current range

Base current

Arc force

Efficiency

Power factor

Protection class

Insulation class

gross weight

Dimension

Packing dimension.