> The exact ingredients of the plastic are not known since there were no records kept of the plastic itself. Speculation is that it was a combination of soybeans, wheat, hemp, flax and ramie. Lowell Overly, the person who had the most influence in creating the car, says it was "...soybean fiber in a phenolic resin with formaldehyde used in the impregnation." [16]
What are the binders for aerospace -grade hemp plastic these days? I don't think that formaldehyde is required anymore.
Hempitecture has salt-treated fire retardant hemp batting home insulation product which competes with fiberglass and cellulose batting and fill, and cork.
Kestrel has a modern vehicle made of hemp plastic.
Name of the 75% hemp aircraft made by Hempearth scientist from Canada doing engineering in the US:
Radar (ROC curve in ML, too) and these days Infrared signatures for hemp vehicles and crafts:
Hemp plastic would have been an advantage in WWII if:
These days many major auto manufacturers use hemp parts in production automobiles for its durability, cost, and sustainability in terms of carbon cost for example.
Hemp bast fiber competes with graphene in ultracapacitor anode applications, and IDK why not normal capacitors and batteries too. Hemp anodes are possibly more sustainable than graphene anodes (in supercapacitors and solid state batteries) due to the environmental and health hazards of graphene production and the relative costs of production.
Dimensional Hemp Wood lumber is real, and it is a formaldehye-free sustainable binder FWIU.
So - and this is what Kestrel and Hempearth are going for - it's probably possible to make closer to 100% of a vehicle or an aircraft with biocomposites inspecific or even hemp-only.
> The non-open-source components include the 2.5GbE PHY and WiFi firmware with blobs running on separate cores that are independent of the main SoC where OpenWrt is running. The DRAM calibration routines are closed-source binaries as well.
Software for FPGA switch, probe, and GHz oscilloscope projects?
> hwtLib is the library of hardware components writen using hwt library. Any component can be exported as Xilinx Vivado (IP-exact) or Quartus IPcore using IpPackager or as raw Verilog / VHDL / SystemC code and constraints by to_rtl() function. Target language is specified by keyword parameter serializer.
> Open vSwitch can operate both as a software-based network switch running within a virtual machine (VM) hypervisor, and as the control stack for dedicated switching hardware; as a result, it has been ported to multiple virtualization platforms, switching chipsets, and networking hardware accelerators.[7]
strace is one way to determine how many stat calls a process makes.
Developers avoid refactoring costs by using dependency inversion, fixtures and functional test assertions without OO in the tests, too.
Pytest collection could be made faster with ripgrep and does it even need AST? A thread here mentions how it's possible to prepare a list of .py test files containing functions that start with "test_" to pass to the `pytest -k` option; for example with ripgrep.
One day I did too much work refactoring tests to minimize maintenance burden and wrote myself a functional test runner that captures AssertionErrors and outputs with stdlib only.
It's possible to use unittest.TestCase() assertion methods functionally:
unittest.TestCase assertion methods
have default error messages, but the `assert` keyword does not.
In order to support one file stdlib-only modules, I have mocked pytest.mark.parametrize a number of times.
chmp/ipytest is one way
to transform `assert a == b` to `assertEqual(a,b)` like Pytest in Jupyter notebooks.
Python continues to top language use and popularity benchmarks.
Python is not a formally specified language, mostly does not have constant time operations (or documented complexity in docstring attrs), has a stackless variant, supported asynchronous coroutines natively before C++, now has some tail-call optimization in 3.14, now has nogil mode, and is GPU accelerated in many different ways.
How best could they scan for API tokens committed to public repos?
You haven't pointed out anything specific to FR4, which is what this would be replacing. This is merely a ploy at getting funding, and I'm very skeptical about it because I've seen 2 or 3 companies do the exact same pitch and fail before.
Graphene is free when you flash heat unsorted recycled plastic and sell or use the Hydrogen.
Graphene can be produced from CO2.
CO2 is overly-abundant and present in emissions that need to be filtered anyway.
What types of graphene and other forms of carbon do not conduct electricity, are biodegradable , and would be usable as a graphene PCB for semiconductors and superconductors?
Graphene Oxide (low cost of production), Graphane (hydrogen; high cost of production), Diamond (lowering cost of production, also useful for NV QC nitrogen-vacancy quantum computing; probably in part due to the resistivity of the molecular lattice),
On my info page (https://brandonli.net/semisim/info) there's a list of things my simulation can and can't do. After taking a look at the paper you mentioned, I think simulating it may very well be possible, however it might take a bit of effort. As for graphene, its band structure is different enough that I don't think it would work.
Note that my simulation is intended for educational purposes only, not scientific research.
Thanks, quite the useful simulator; I hadn't found that page yet. Additional considerations for
circuit simulators:
What does the simulator say about signal delay and/or propagation in
electronic circuits and their fields? How long does it take for a
lightbulb to turn on after a switch is thrown, given the length of the
circuit and the real distance between points in it?
(I learned this gap in our understanding of electron behavior from
this experiment, which had never been done FWIU: "How Electricity
Actually Works" (2022) https://www.youtube.com/watch?v=oI_X2cMHNe0 )
I recreated Veritasium's setup in my simulator and measured the current through the load resistor, the results of which are here:
https://imgur.com/a/sxVihf0
The gap between the wires is about 1 micrometer, so light should take about 3 fs to propagate through. The simulation output approximately matches this prediction, and over the first few tens of femtoseconds the current increases, with a jump at around 70 fs due to the reflected wave. All of this is pretty much in line with the results of Veritasium's experiment.
Thanks for bringing it up. I might include this as another example in my sim.
> [...] have successfully demonstrated that a beam of light can not only be confined to a spot that is 50 times smaller than its own wavelength but also “in a first of its kind” the spot can be moved by minuscule amounts at the point where the light is confined.
Soybean car > History, Internet video (of Rollins with a fireman's , Car ingredients: https://en.wikipedia.org/wiki/Soybean_car#Car_ingredients :
> The exact ingredients of the plastic are not known since there were no records kept of the plastic itself. Speculation is that it was a combination of soybeans, wheat, hemp, flax and ramie. Lowell Overly, the person who had the most influence in creating the car, says it was "...soybean fiber in a phenolic resin with formaldehyde used in the impregnation." [16]
What are the binders for aerospace -grade hemp plastic these days? I don't think that formaldehyde is required anymore.
Hempitecture has salt-treated fire retardant hemp batting home insulation product which competes with fiberglass and cellulose batting and fill, and cork.
FWIU treated polyurethane foam (like old seat cushions) absorbs oil (OleoSponge),
Kestrel has a modern vehicle made of hemp plastic.
Name of the 75% hemp aircraft made by Hempearth scientist from Canada doing engineering in the US:
Radar (ROC curve in ML, too) and these days Infrared signatures for hemp vehicles and crafts:
Hemp plastic would have been an advantage in WWII if:
These days many major auto manufacturers use hemp parts in production automobiles for its durability, cost, and sustainability in terms of carbon cost for example.
Hemp bast fiber competes with graphene in ultracapacitor anode applications, and IDK why not normal capacitors and batteries too. Hemp anodes are possibly more sustainable than graphene anodes (in supercapacitors and solid state batteries) due to the environmental and health hazards of graphene production and the relative costs of production.
YouTube has videos of hemp batteries; batteries made of hemp. https://www.youtube.com/results?sp=mAEA&search_query=hemp+ba...
Dimensional Hemp Wood lumber is real, and it is a formaldehye-free sustainable binder FWIU.
So - and this is what Kestrel and Hempearth are going for - it's probably possible to make closer to 100% of a vehicle or an aircraft with biocomposites inspecific or even hemp-only.