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Comment: Re:This is not really new (Score 1) 60

by hamjudo (#47293619) Attached to: 3D-Printed Material Can Carry 160,000 Times Its Own Weight
The Fine article compares this type of lattice structure to the structure of the Eiffel Tower. They didn't claim anything more than being able to do it at a very fine scale, and to do it sufficiently precisely to get something that can support 160,000 times its one weight. They are just claiming refinements on centuries of engineering advances. The strength of well engineered 3D printed structures is still impressive. Even some printers that hobbyists can afford can beat out solid materials. It's only getting better.

Comment: It is all a matter of cost and size (Score 1) 101

by hamjudo (#46455495) Attached to: Intel Rolling Out 800Gbps Cables This Year

These will be used in data centers where it is common to have redundant systems connected with redundant cables, in order to maintain really high uptimes. Say a hypothetical system has a cluster which consists of 16 compute nodes and 2 storage nodes, Each of CPUserver01 through CPUserver16 will have two of these cables going to storageServerA, and two going to StorageServerB. For a total of 64 of these cables, for that one little compute cluster. Which would leave it an island, so of course there will be more network interfaces.

For this technology to get any market penetration, it will need to be cost effective at these bandwidths, and fit in the racks. Historically, Dense Wavelength Division Multiplexing, DWDM has been great at getting a lot of bandwidth on to a very long single strand (comparatively) inexpensive fiber, which allows in fiber signal amplification, and is the winner at going the distance, but not so good at being cost effective, or space efficient. These things, with the associated drivers should take up far less space inside the servers, and cost less, but they only will get 800Gbits in each direction, only go 300 meters, and use much more expensive (per kilometer of cable) 64 strand fiber.

Comment: Re:What's the killer app for flexible ICs? (Score 1) 15

by hamjudo (#46289277) Attached to: Hard Silicon Wafers Yield Flexible Electronics

Rigid silicon requires rigid interconnects. Flexible ICs allow flexible packaging, or different packaging. Instead of building from the printed circuit board up, build from the heatsink up. Use a precision pick and place system to glue the thin, wimpy, inexpensive silicon to the strong massive heatsink. Then mask on the solder balls. Then apply a thin, wimpy, inexpensive circuit "board". Attach all the old style surface mount components to the other side of the circuit "board". "Board" is in quotes because it would get all of its mechanical strength from heatsink. It might be so thin, it is no longer board like.

The big win here, is that one wafer is good for at least 5 sets of circuits. The lose is the grid of holes etched through the silicon as part of the pealing process. Assuming the grid of holes doesn't use up a significant portion of the surface area, the factory is getting close to 5 times as many devices out of each ingot of silicon.

Comment: It is a student design project (Score 1) 3

by hamjudo (#45971351) Attached to: Revolutionary Scuba Mask Creates Breathable Oxygen Underwater On Its Own
You can see the student's portfolio on his website: . He probably got a good grade. The case looks nice, if not plausible. The design for the guts of the device is lacking. He got the biology wrong, divers don't want pure oxygen. They need a mixture of gasses. The machine would have to process a whole lot of water to get enough oxygen to support a human. This means a whole lot of water would have to continuously flow through the device. Moving that much water takes a lot of energy.

Comment: Real time double entry bookkeeping (Score 1) 303

by hamjudo (#45806303) Attached to: Website Checkout Glitches: Two Very Different Corporate Responses
A few trading firms have learned to have a second system that monitors transactions to keep tabs on profit and loss. If the things swing out of the expected range, it is time to have a human look at the situation. If things get really out of hand, it is time to rate limit transactions, or halt them out right. Sudden extreme profits usually indicates a data entry error on your system, not that the rest of the market has gotten really stupid.

Most inventory systems have a way to track cost of goods, age of inventory, and expected profit margin. Eventually retailers will start filling in those details, and tracking them, so they can notice when something goes expensively wrong.

Comment: I've got a Qi charger (Score 1) 223

by hamjudo (#45483061) Attached to: Google Nexus Gets Wireless Charger
It works even if my Nexus 5 is more than 5 mm above the charging pad. That is many orders of magnitude less than the range for most wireless communication technologies.

The useful features are

  1. no connector to wear out,
  2. alignment is simple.
  3. The USB/thinport connector is available for other uses. (More of a theoretical benefit, as I don't use the USB port for anything, but I could if I wanted to. I've got the cable, I could even plug in an SD card reader.)

Comment: Re:HDMI has limitation built in to the spec (Score 2) 256

by hamjudo (#45071327) Attached to: AMD Intentionally Added Artificial Limitations To Their HDMI Adapters
I have a monitor hooked up to my ComCast cable box in the exercise room. After I exercised for a while, I would get the stupid HDCP warning and/or the video would just cut out. I switched cables, I switched HDMI - DVI adapters, I switched monitors. It seemed like every time I started exercising, the video would stop.

It got worse recently, making it easy to diagnose. It got to the point where the video went away within a second of starting the treadmill. It is an EMI issue. Either the treadmill is emitting too much, or the ComCast box's suicide circuit is too sensitive.

I am so pleased that my ComCast has a suicide circuit to protect me from evildoers who modify treadmills to steal valuable copy righted material.

Comment: Re:At the cost of cost of a diverse ecosystem (Score 4, Interesting) 321

by hamjudo (#44814505) Attached to: Intel's Haswell Chips Pushing Windows RT Into Oblivion
They claim 4.5 watts for the low power usage scenario. ARM will be with us for a long time. The ARM folks are climbing the feature/performance curve too. Don't worry about AMD, they are bringing out ARM chips too. Including the ARMv8, aka. ARM64. AMD describes more fruits of ARM embedded partnership

Never test for an error condition you don't know how to handle. -- Steinbach