femto

80 ms·

961.
by femto 9y ago
An interesting question! Typical banana dose: 0.1 μSv per banana [1]. Typical concrete building dose: 100μSv per year [2] ie. 1 year in a concrete building = eating 3 bananas a day. I'm not claiming that fly ash laden concrete is going
962.
by femto 9y ago
I just did a guesstimate: Combustion concentrates radioactivity by a factor of 5x to 10x [1]. Fly ash can replace 25-50% of cement [2]. A typical concrete is 16% cement (1 part cement, 2 parts sand and 3 parts gravel) [3]. Hence a concret
963.
by femto 9y ago
Building on your "lots of places" comment: I've got memories of an experiment we did in undergraduate physics labs, which involved a directional array of Geiger tubes. Pointing them at the view through the window gave a low
964.
by femto 9y ago
By my reading, the trust of the article is that Trump's decision will have minimal impact on in progress actions to counter climate change, hence the words you quoted. The major impact of his decison will be on the USA's internat
965.
by femto 9y ago
I can see the fascination of this problem. There are so many ways to approach it, from addressing the physics, to higher level attempts to get the right look. Searching around, it seems to have justifiably caught the imagination of many.
966.
by femto 9y ago
The Australian classic novel, "For the Term of His Natural Life" by Marcus Clark (1874) contains a fictionalised account of this mutiny and convict life. It's a good read. The novel in turn draws from Clark's earlier pi
967.
by femto 9y ago
Wind tunnels. The workshop attached to DSTO's wind tunnel used to be a model maker's (and foreign order) paradise. I'd imagine that wind tunnels are gradually being supplanted by simulation, but that there is still a demand
968.
by femto 9y ago
CSIRO/Data61 have demonstrated with their Zebedee system [1], that the precision mechanical system is optional. Their handheld LIDAR head bounces around randomly and the system is able fit and register the new measurements within the 3
969.
by femto 9y ago
Interestingly it was a bunch of Swedes, the Rhythm Hot Shots[1], who contacted Frankie Manning in the 1980s. The dance classes that Frankie Manning did in Australia in the early 2000s were a blast. [1] https://en.wikipedia.org&#
970.
by femto 9y ago
I recall the same type of network and exactly the same situation here in Australia, with a student locking everyone out. From memory, despite appearances the password system was essentially an honour system, involving one computer being th
971.
by femto 10y ago
Maintaining balance on uneven ground also works your lower back and pelvic floor more than on a concrete path. Strengthening these can help if you have back plane (and one could argue that chronic pain is an impediment to thinking).
972.
by femto 10y ago
That was my first thought too. My second thought was that the most effective recreation would be to build a SPICE model [1], and whether that SPICE model could run in near real time on a modern CPU. A simple SPICE model should be straight
973.
by femto 10y ago
A similar thing for NSW: $25k without revenue or up to $100k with revenue. https://www.jobsfornsw.com.au/how-we-help/start-ups I haven't looked at other states, but the Australian states are competitive enough tha
974.
by femto 10y ago
Just wanted to make it clear to the casual reader, who was considering learning about FPGAs, that "plenty of money" doesn't have to be the case. It would be a pity if we lost a newbie :-)
975.
by femto 10y ago
An undefined variable is an abstract construct. You can model a floating input in as being analogous to an undefined variable and the model will fit reality most of the time, but the underlying reality is still governed by the complexities
976.
by femto 10y ago
> It costs plenty of money. Not for the entry level. The Icestorm [1] tools are free software, in every sense of the word, and can take you all the way from Verilog source (or VHDL using GHDL's analyser [2]) to a bitstream. An ass
977.
by femto 10y ago
> John Deere tractors run on open source software Out of curiosity, what range of open source licenses appear in the code base? Do they use any software whose license requires source distribution? If so, are you aware of a "source
978.
Stargazing Live viewers find four-planet solar system via crowd-sourcing project(abc.net.au)
2 points by femto 10y ago|0 comments
979.
by femto 10y ago
Next step: build his analog pong computer into his home built CRO? Just like having "snake" inside your phone, but it's pong inside your CRO. https://www.eevblog.com/forum/projects/designed-a-cro-in
980.
by femto 10y ago
I think part of it is that the cost of messing up and having an undetected design fault in deployed hardware can be so huge for the big players. The big players are where the EDA vendors make most of their money and so derive their mindset
981.
by femto 10y ago
The thing I want to know is how did they achieve the independence, whereby they could focus on their problem of choice and not have to continuously context switch to problems of other people's choosing?
982.
by femto 10y ago
Thanks for prompting me to do further research on this. I didn't realise from the initial posting, that this course is based on prerecorded videos and can be completed asynchronously, to fit in with life. The site say students "
983.
by femto 10y ago
> Combining memory and processing resources in a single device has huge potential to increase the performance and efficiency of DNNs as well as others forms of machine learning systems. Isn't that describing a Field Programmable Ga
984.
by femto 10y ago
Why does the signal include an amber and green light?
985.
by femto 10y ago
Kobos are quite hackable [1], to the extent that their Linux operating system is on a removable internal SD card, and you can run Debian on them [2]. [1] https://wiki.mobileread.com/wiki/Kobo_Touch_Hacking [2] https:&
986.
by femto 10y ago
An explanation for the lay person of why this is. Engineering degrees typically start off with a couple of years of general science education, with minimal contact with the engineering faculty. It's often not until halfway though the
987.
by femto 10y ago
If you can couple up with a local academic institution, and get them to submit your chip as a research or teaching project, MOSIS will fabricate your chip for free [1]. They will package up to 5 chips, though it's not clear whether th
988.
by femto 10y ago
It is practical, but it's important to have the core of your code optimised. In particular, you will need a very tight "multiply-accumulate" loop, as typically used in an FIR filter. By way of real-world example, a 9600 bps
989.
by femto 10y ago
A valid point! The economics of integration seems to be driving us towards single boxes which suit stifled competition? Is there an opening here for a non-manufacturing "open" standards body to emerge? They could publish mechani
990.
by femto 10y ago
Did the upgradeable PC ever really work, or did the vast majority of PCs sold go to the dump with exactly the same configuration as sold? After a few years, it becomes a cascade of dependencies: Can't upgrade memory because the old mo

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