I have the slightly older Odroid C1, which competes against the PI2. Gigabit is definitely noticeable, and it quite happily saturates the Gigabit link well before saturating the CPU. It performs well enough that I can use the Odroid as low cost, low power file server.
Eating food raw requires you to eat it very fresh, or have refrigerated storage. Since cavemen didn't have fridges, that leaves the fresh option.
Eating things fresh implies that you have space to eat it, and only gather a small amount at a time, That's not a very reliable survival option and leaves you a high risk of starving if a few hunts are unsuccessful.
Fire and knives allow for larger kills to be made, and older meat to be consumed safely. It even allows for preservation of meat through drying and smoking etc. This is a great survival technique to help survive periods where fresh food is unavailable.
Supercapaitors store charge though both electrostatic and chemical potential. It's called electric double-layer capacitor, and they sit somewhere between conventional capacitors and batteries.
That said it's annoying the article mentioned capacitors and I expect that kind of claim invalidates the rest of their hype.
We have a planet that is very rich in very high energy-density resources like coal, oil, natural gas (which are made by applying enormous pressures and temperatures to vast amounts of biomass over millions of years) and also things like uranium.... but then we have morons who want us to skip all the high-energy-density naturally-occurring energy sources and become the industrial version of cows - choosing the lowest-energy-density least-efficient and least-economical energy sources.
Have you heard of the carbon cycle? And radioactive half-lives?
These natural high density energy sources are super convenient, but there are genuine risks and environmental impact. It can be argued that we'll be paying for the deferred costs of these impacts for a long time yet.
Biofuel on the other hand a closed cycle and far more sustainable, which in itself is a worthy goal to pursue.
I often do similar, occasionally putting it in 2 instead of D and wondering why the response feels so different. That said I'm only doing 50km/hr (31mph) at the time.
If people can manage to to 65mph in low gear without realising they should probably hand their license back in.
This is just another salvo in our current (right wing) government's attacks on science and environment in this country. It's hard to fathom why, existing projects were doing great research and delivering profitable discoveries.
Over past two years there have been massive cuts across the technology sector, including: - $300 million cut to Sustainable Research Excellence at universities - $115 million cut to CSIRO - $75 million cut to Australian Research Council - $107 million cut to Cooperative Research Centres - $8 million cut to Australian Institute of Marine Science - $28 million cut to Australian Nuclear Science and Technology Organisation - $16 million cut to Geoscience Australia - $120 million cut to Defence Science and Technology
Over 1400 jobs have been lost at the CSIRO (the guys who invented the main technologies behind WiFi), and to add insult to injury we didnt even have a Science Minister in our government cabinet for several years there.
And on the environment: - abolished the carbon tax - wound back renewable energy targets - abolished the Climate Commission - attempted to abolish the Clean Energy Finance Corporation and the Renewable Energy Agency, and recently prevented them investing in mainstream wind / solar - defunded the environmental defenders office
Meanwhile, they repealed a mining tax and wanted to drop the company tax rate. They also wanted to sink $244 million into a non-secular school chaplain program, but the high court ruled it was invalid.
Diodes cause an undesirable voltage drop in low voltage circuits like this. Even Schottky diodes at 0.2V or so is still significant.
A FET however is a resistive device and can be as low as a few milliOhm. This means much lower voltage drop on the sorts of currents you'd see with USB.
What if you had superior technology, and could harvest the solar wind and/or direct energy to matter conversion in order to acquire your building materials. No need to mine anything.
This passive film is inside the cell and acts quickly. They specifically mention that the external thermisters / PTC polyfuses act much slower and are not always fast enough to prevent problems.
Watch the video, it has a locking pin to prevent the flow being switched back on accidentally. Unlocking it requires a double action of depressing the pin and activating the switch.
Even the shittiest toy quadcopters have self stabilising geometry, and only slightly more expensive ones have active stabilising electronics. A lot of them have fan shrouds and can take a few bumps and crashes without incident. The barrier for entry is very low and the potential for misuse is high.
By comparison, most RC helicopters end up as a pile of twisted metal and shattered carbon about 10 seconds after their launch. RC aircraft would also end up in the dirt pretty quickly, but usually just broke a prop or something. If you managed to keep them in the air, they require constant high levels of attention that is just not sustainable for long. The learning curve required encouraged people to join clubs and get proper training on how to be a safe and responsible flier.
It's similar but almost completely unlike the twisting in twisted pair.
A normal toroidal tokomak has the magnets closer together and the centre than at the outside, and the variation in the resulting magnetic field leads to instabilities. The twist in the stellerator is supposed to ensure that the variations in magnetic field all get cancelled out as the plasma circulates.
I don't see why people are criticizing the Pi Zero so much, I can only assume they lack imagination. If you need to buy the extra peripherals then maybe a full size Pi is a better choice, but that doesn't mean there's not a valid use for the Pi Zero.
For example: - Training labs where the the peripherals can be re-used, but if someone fries a board it's only a $5 replacement instead of $35. - Portable/mobile projects where USB WiFi is sufficient. - Standalone, embedded projects that require a little more grunt than an Arduino - eg image recognition using a USB webcam.
The fact that the Pi Zero exists only helps the community, and having a little extra choice is a great thing. I think it's freaking awesome.
I've got about a 10 micro-pc and embedded projects around the house.
Five of those projects use an arduino (usually a nano) because that's all they require. They are cheap, reliable and dead easy to program.
The remaining five use RPI's. Three of those are small headless servers (file server, zoneminder and squid proxy), so they need Ethernet for the performance. The fourth is an OctoPi 3D Print Server, it only needs USB Serial and USB Wifi. The last one is a Brew Plant controller running a webserver, it's on a mobile platform inside a sealed box so uses USB Wifi too (and the GPIO).
So out of ten projects, two of those could have used a much cheaper PI Zero with absolutely no loss in functionality or utility, and the reduction in size would have been an advantage. Every project has a different set of requirements, sometimes there is overlap between products and sometimes it is clear. One thing is for sure though, there is definitely a use case for the Pi Zero,
The charging comment is only true up to a point. As you get larger solid packs, the surface area doesn't increase as fast as the volume and the insides can get very hot. Thermal management is super critical for many battery types so this is a major limitation.
With a small cylindrical battery, the empty packing space between the cells provides a perfect channel for cooling.
In a rocket,: - Rockets are quite inefficient, about 16% energy efficient to reach orbit. - You have to lift your propellant, only to throw it all away - The rocket not only has to do work against gravitational potential, it also has to provide lateral kinetic energy to reach orbit. The kinetic energy component is huge.
For a space elevator: - The lifting motors are highly efficient, you just have to keep the power beaming losses reasonable. - You only have to work against gravitational potential. The tether/earth provides the lateral kinetic energy.
There are degrees of off/standby. It's good engineering practice and environmentally that when you "soft" power down, you turn off as many internal circuits as you are able and only retain basic functionality required to turn back on again.
Eg: LED off Camera sensor off completely WiFi chip in low power / periodic transmit mode CPU at lower clock speed or sleep mode with periodic wake up timer.
Not doing this means that the camera designers were either: 1) Lazy and unprofessional or 2) Planning to retain the camera functionality for nefarious uses.
Slashdot Mirror
I have the slightly older Odroid C1, which competes against the PI2. Gigabit is definitely noticeable, and it quite happily saturates the Gigabit link well before saturating the CPU. It performs well enough that I can use the Odroid as low cost, low power file server.
Eating food raw requires you to eat it very fresh, or have refrigerated storage. Since cavemen didn't have fridges, that leaves the fresh option.
Eating things fresh implies that you have space to eat it, and only gather a small amount at a time, That's not a very reliable survival option and leaves you a high risk of starving if a few hunts are unsuccessful.
Fire and knives allow for larger kills to be made, and older meat to be consumed safely. It even allows for preservation of meat through drying and smoking etc. This is a great survival technique to help survive periods where fresh food is unavailable.
This is not your Grandmother's USB signalling. USB3 has evolved a long way and has excellent bandwidth with significantly reduced latency.
Agreed. Marketing sleazebags.
p.s. I sincerely hope I'm wrong though.
Supercapaitors store charge though both electrostatic and chemical potential. It's called electric double-layer capacitor, and they sit somewhere between conventional capacitors and batteries.
That said it's annoying the article mentioned capacitors and I expect that kind of claim invalidates the rest of their hype.
We have a planet that is very rich in very high energy-density resources like coal, oil, natural gas (which are made by applying enormous pressures and temperatures to vast amounts of biomass over millions of years) and also things like uranium.... but then we have morons who want us to skip all the high-energy-density naturally-occurring energy sources and become the industrial version of cows - choosing the lowest-energy-density least-efficient and least-economical energy sources.
Have you heard of the carbon cycle? And radioactive half-lives?
These natural high density energy sources are super convenient, but there are genuine risks and environmental impact. It can be argued that we'll be paying for the deferred costs of these impacts for a long time yet.
Biofuel on the other hand a closed cycle and far more sustainable, which in itself is a worthy goal to pursue.
Yeah, but I think we can all agree that "Gold Dusted Dog Turd" is universally a bad flavor of ice cream.
Yeah I thought the same.
Poor journalism backed up by lazy editing.
I often do similar, occasionally putting it in 2 instead of D and wondering why the response feels so different. That said I'm only doing 50km/hr (31mph) at the time.
If people can manage to to 65mph in low gear without realising they should probably hand their license back in.
and all about the politics.
This is just another salvo in our current (right wing) government's attacks on science and environment in this country. It's hard to fathom why, existing projects were doing great research and delivering profitable discoveries.
Over past two years there have been massive cuts across the technology sector, including:
- $300 million cut to Sustainable Research Excellence at universities
- $115 million cut to CSIRO
- $75 million cut to Australian Research Council
- $107 million cut to Cooperative Research Centres
- $8 million cut to Australian Institute of Marine Science
- $28 million cut to Australian Nuclear Science and Technology Organisation
- $16 million cut to Geoscience Australia
- $120 million cut to Defence Science and Technology
Over 1400 jobs have been lost at the CSIRO (the guys who invented the main technologies behind WiFi), and to add insult to injury we didnt even have a Science Minister in our government cabinet for several years there.
And on the environment:
- abolished the carbon tax
- wound back renewable energy targets
- abolished the Climate Commission
- attempted to abolish the Clean Energy Finance Corporation and the Renewable Energy Agency, and recently prevented them investing in mainstream wind / solar
- defunded the environmental defenders office
Meanwhile, they repealed a mining tax and wanted to drop the company tax rate. They also wanted to sink $244 million into a non-secular school chaplain program, but the high court ruled it was invalid.
You can see where this is going yeah?
And all we have to show for it is a lousy 102 seconds. :(
Diodes cause an undesirable voltage drop in low voltage circuits like this. Even Schottky diodes at 0.2V or so is still significant.
A FET however is a resistive device and can be as low as a few milliOhm. This means much lower voltage drop on the sorts of currents you'd see with USB.
Urgh, wont maintaining solar roadways be an order of magnitude or two more expensive than bitumen?
What if you had superior technology, and could harvest the solar wind and/or direct energy to matter conversion in order to acquire your building materials. No need to mine anything.
You should RTFA.
This passive film is inside the cell and acts quickly. They specifically mention that the external thermisters / PTC polyfuses act much slower and are not always fast enough to prevent problems.
Watch the video, it has a locking pin to prevent the flow being switched back on accidentally. Unlocking it requires a double action of depressing the pin and activating the switch.
Ease of use.
Even the shittiest toy quadcopters have self stabilising geometry, and only slightly more expensive ones have active stabilising electronics. A lot of them have fan shrouds and can take a few bumps and crashes without incident. The barrier for entry is very low and the potential for misuse is high.
By comparison, most RC helicopters end up as a pile of twisted metal and shattered carbon about 10 seconds after their launch. RC aircraft would also end up in the dirt pretty quickly, but usually just broke a prop or something. If you managed to keep them in the air, they require constant high levels of attention that is just not sustainable for long. The learning curve required encouraged people to join clubs and get proper training on how to be a safe and responsible flier.
It's similar but almost completely unlike the twisting in twisted pair.
A normal toroidal tokomak has the magnets closer together and the centre than at the outside, and the variation in the resulting magnetic field leads to instabilities. The twist in the stellerator is supposed to ensure that the variations in magnetic field all get cancelled out as the plasma circulates.
Haters gonna hate....
I don't see why people are criticizing the Pi Zero so much, I can only assume they lack imagination. If you need to buy the extra peripherals then maybe a full size Pi is a better choice, but that doesn't mean there's not a valid use for the Pi Zero.
For example:
- Training labs where the the peripherals can be re-used, but if someone fries a board it's only a $5 replacement instead of $35.
- Portable/mobile projects where USB WiFi is sufficient.
- Standalone, embedded projects that require a little more grunt than an Arduino - eg image recognition using a USB webcam.
The fact that the Pi Zero exists only helps the community, and having a little extra choice is a great thing. I think it's freaking awesome.
I've got about a 10 micro-pc and embedded projects around the house.
Five of those projects use an arduino (usually a nano) because that's all they require. They are cheap, reliable and dead easy to program.
The remaining five use RPI's. Three of those are small headless servers (file server, zoneminder and squid proxy), so they need Ethernet for the performance. The fourth is an OctoPi 3D Print Server, it only needs USB Serial and USB Wifi. The last one is a Brew Plant controller running a webserver, it's on a mobile platform inside a sealed box so uses USB Wifi too (and the GPIO).
So out of ten projects, two of those could have used a much cheaper PI Zero with absolutely no loss in functionality or utility, and the reduction in size would have been an advantage. Every project has a different set of requirements, sometimes there is overlap between products and sometimes it is clear. One thing is for sure though, there is definitely a use case for the Pi Zero,
The charging comment is only true up to a point. As you get larger solid packs, the surface area doesn't increase as fast as the volume and the insides can get very hot. Thermal management is super critical for many battery types so this is a major limitation.
With a small cylindrical battery, the empty packing space between the cells provides a perfect channel for cooling.
The person you heard that from was wrong.
In a rocket,:
- Rockets are quite inefficient, about 16% energy efficient to reach orbit.
- You have to lift your propellant, only to throw it all away
- The rocket not only has to do work against gravitational potential, it also has to provide lateral kinetic energy to reach orbit. The kinetic energy component is huge.
For a space elevator:
- The lifting motors are highly efficient, you just have to keep the power beaming losses reasonable.
- You only have to work against gravitational potential. The tether/earth provides the lateral kinetic energy.
Did you RTFA?
It's cheap because it's a thin foil. There's simply not much copper per unit area.
There are degrees of off/standby. It's good engineering practice and environmentally that when you "soft" power down, you turn off as many internal circuits as you are able and only retain basic functionality required to turn back on again.
Eg:
LED off
Camera sensor off completely
WiFi chip in low power / periodic transmit mode
CPU at lower clock speed or sleep mode with periodic wake up timer.
Not doing this means that the camera designers were either:
1) Lazy and unprofessional
or
2) Planning to retain the camera functionality for nefarious uses.