bridge collapse?
Question by cassie w: bridge collapse?
has anybody seen the news about the bridge collapase in minneapolis MN??? if u have isn’t it freaky??
i guess it was last inspected in 2004
Best answer:
Answer by Mark623112
I would not want to be the person(s) who last inspected it.
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Canterbury Earthquake – first flyover of fault trace
GNS Scientists make an initial aerial assessment of the fault trace southwest of Christchurch
Chilean students have taken over schools and city streets in the largest protests the country has seen in decades. These actions are causing a political crisis for the country’s billionaire President, Sebastian Piñera. The students are demanding free education, and an end to the privatization of their schools and universities. The free-market based approach to education was implemented by the military dictator Augusto Pinochet in his last days in power. As the demonstrations in Chile coincide with protests erupting globally, Fault Lines follows the Chilean student movement during their fight in a country that is among the most unequal in the world. This episode of Fault Lines first aired on Al Jazeera English on January 2, 2012 at 2230 GMT. english.aljazeera.net Follow us on Twitter: twitter.com Follow us on Facebook: facebook.com Follow us on Tumblr: ajfaultlines.tumblr.com See all episodes of Fault Lines www.youtube.com Meet the Fault Lines staff: www.youtube.com
AES Tutorial: Design of High-Performance Balanced Audio Interfaces by Bill Whitlock
High signal-to-noise ratio is an important goal for most audio systems. However, AC power connections unavoidably create ground voltage differences, magnetic fields, and electric fields. Balanced interfaces, in theory, are totally immune to such interference. For 50 years, virtually all audio equipment used transformers at its balanced inputs and outputs. Their high noise rejection was taken for granted and the reason for it all but forgotten. The transformer’s extremely high common-mode impedance—about a thousand times that of its solid-state equivalents—is the reason. Traditional input stages will be discussed and compared. A novel IC that compares favorably to the best transformers are described. Widespread misunderstanding of the meaning of balance as well as the underlying theory has resulted in all-too-common design mistakes in modern equipment and seriously flawed testing methods. Therefore, noise rejection in today’s real-world systems is often inadequate or marginal. Other topics will include tradeoffs in output stage design, effects of non-ideal cables, and the pin 1 problem. AES Members can watch the full-length high resolution version of this tutorial on the AES Tutorials page: www.aes.org
Video Rating: 5 / 5
How tocreate fast and efficient FPGA designs by leveraging your ASIC design experience. (For more info visit: www.xilinx.com ) This course will help you avoid the most common design mistakes of FPGA designers. It will also help you fit your design into a smaller FPGA or a lower speed grade for reducing system costs.
Video Rating: 5 / 5
Design flaw: why aren’t all laptops manufactured out of metal (steel, aluminium), like the Apple Macbook Pro?
Question by Corruptor Bot ¦ÆЩ±®¬: Design flaw: why aren’t all laptops manufactured out of metal (steel, aluminium), like the Apple Macbook Pro?
Why aren’t all laptops manufactured out of metal (steel, aluminium), like the Apple Macbook Pro?
My father recently purchased an Apple Macbook Pro. Very impressive notebook computer. But what really caught my attention is the fact that it’s made from a single block of genuine aluminium. Thus I just wondered why aren’t most electronic devices and consumer electronic products and their external shells made out of metal? Surely then it will be near-indestructible.
And another flaw I noticed in many mobile phones is that the LCD screen is positioned too close to the actual plastic screen surrounding it. To see what I mean, look at a Samsung D600, and look at the screen from an angle, and you’ll notice there’s a fairly large gap between the plastic screen and the actual LCD inside. This is good. Because without the gap, you can drop the phone and the LCD will crack easily. Many laptops have this same design flaw.
Best answer:
Answer by billrussell42
My previous macbook had a plastic case. It worked fine, no problems. My current one is made from aluminum. It’s fine also. A bit thinner than the previous one.
Milling something from a block of aluminum is expensive. The manufacturer has to make tradeoffs between cost and usability, and they all make the tradeoff’s differently. Don’t forget the unit with the aluminum case sells for 00.
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Cosmic rays and alpha particles soft errors : Risk to semiconductors
Soft error is a real threat to safety and reliability in micro electronic device. The purpose of this presentation is to give guidelines to assess the level of risk of your design and present an approach to deal with the problem.
How to Design, Develop & Manufacture a PCB | Part 9 – Testing & Fault Finding
This is part 9 of a series of videos describing how to design, develop and manufacture a PCB from start to finish. This is an ongoing project of mine, I hope you enjoy the video and hope you found this series of videos interesting and useful.
Were there design flaws in Collins submarine computerization architecture, apart from the inevitable loophole?
Question by The Path I Choose: Were there design flaws in Collins submarine computerization architecture, apart from the inevitable loophole?
that would allow a bonehead to seize control of the project ?
Best answer:
Answer by Morpheus
The more advanced a new system is…the more likely it will have design flaws.
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How many oil rigs have a similar design flaw to the one that failed in the gulf?
Question by retrovertigo: How many oil rigs have a similar design flaw to the one that failed in the gulf?
Everybody is saying how BP cut corners on that rig…or wellhead equipment. (you have to pardon me, I am not an expert) Does anybody know how many other ones there are?
Best answer:
Answer by Bad Moon Rising
What design flaw?
I think you are confusing wellhead equipment with the rig specifications!
EDIT:
The design of every wellhead is pretty much unique. It depends on a large number of technical factors relating to pipe sizes which vary from well to well. The rig design had very very little to do with the “accident”. It is a complicated series of technical issues that are to blame, but at the end of the day it is/was bad decisions that were the cause of the blowout. The circumstances that led to the problems, although not unique, are rare. They have to do with the position (vertically) of reservoirs of different reservoir pressure, and an inability to cement in “production casing” if you lose “circulation” of the much heavier cement in behind the production casing. Normally this is not a fatal problem, but reliance on faulty backup systems, some which appear to have been known to be faulty (Blowout Preventers).
The rig and even the equipment itself, had very little to do with the problem.
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Logitech V450 laptop mouse Mini-Receiver Design Flaw!?
Question by Anselmo: Logitech V450 laptop mouse Mini-Receiver Design Flaw!?
After reading through many posts on the logitech forums, I still have not found a solution to this problem.
Basically, my V450 mouse will not respond. Everything indicates that it should work and after going through all the suggested troubleshooting steps, including re-installing setpoint, it still doesn’t work.
One of the posts suggested that there is a design flaw in the mini-receiver and indicated that using a usb hub will solve the problem. However, I tried 2 different usb hubs/extensions and it still doesn’t work. The only thing that works for me is if I physically push down on the mini-receiver with my hand while it’s plugged into either my computer or the usb hub. Then the mouse will work until I take the pressure off again. This causes me to suspect that it is indeed a fatal design flaw with the contacts inside the mini-receiver.
Is there a product recall or faq issued about this problem? If the mini-receiver has been redesigned, where can I obtain a replacement?
Best answer:
Answer by tiggsy
If it’s never worked, and you live in UK, you should send it back for a refund/replacement ASAP. Under the Sale of Goods Act it must be of merchantable quality – ie. it must work. It’s not good enough that it works on someone else’s kit.
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Lower Bartonsville Covered Bridge collapses into the Williams River in Vermont
This covered bridge built in 1870 could not survive the raging water of the Williams River in Lower Bartonsville village in the town of Rockingham, Windham County, VT. We were hoping all day the water would not reach the top of the abutment but the bridge lost its battle rather gracefully as it floated a bit down stream before breaking into pieces. Our town has set up a fund to rebuild our historic bridge go to www.rockbf.org for more information.
Video Rating: 4 / 5