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Thanks for the info. I looked up halogenated hydrocarbons. Fascinating and scary at the same time.
The amount of heat required to break the carbon-chlorine bond is very high.
The general idea was to simply take plastic waste and subject it to a high enough heat to break it into it's monomers. This way sorting of the plastic (which very expensive to do) is avoided. I now wonder if pure monomers are impossible because of the energy requirements, then would the specific weights of the contaminated monomers cause a stratification of the monomers into homogeneous groups that could be siphoned off for reuse. More specifically, if all of the PVC monomers ended up in a pure layer of PVC monomer material, could it be extracted for reuse in PVC products?
Probably depends on the number of chemical bonds done to the monomers, how many unique groupings would be possible and would gravity naturally cause them to arrange themselves to large enough groups to be siphoned off.
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You forgot about one : greed.
Things are not like they are because we do not have the technology or the willing to change them, they are like this because either someone is making a lot of profit out of them and so will not change anything even if the planet dies out of it, or someone should be giving up comfort in their current life and thinks that we are doomed anyway because their own little contribution does not compare to what others are doing on a billion's higher magnitude, and, doomed for doomed, they won't move either.
Those who can change it do not want to change it. Those who suffers from it have no power to change it.
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I kind of lumped greed in with politics. They seem to be two sides of the same coin.
I agree that greed can strangle an idea. (or it can provide motivation to embrace a change.)
If the process of recovering useful material from discarded waste is cost effective, then the greedier corporations will push to adopt it to get an advantage over their rivals. (and make more money)
Politicians can be motivated by the idea that old refineries can be refitted and revitalized providing construction jobs and jobs running the plant when it is finished. Plus all of the support jobs that are generated to support the plant workers. There will be the need for scientific and engineering research and development. Perfect connections for Universities with young graduates who want to make a mark on the world. The existing oil/refinery companies have a deep knowledge of running and maintaining refining facilities. The output of the refinery would be trivial to start with but with time, work and energy it will improve. The oil/refinery companies could care less if they are supplying the raw materials or semi-processed materials (recycled) to manufacturers as long as they are making more money at it. Those that wish to participate will be on the ground floor of a new industry that thrives on the discarded waste of our modern society. The more we invent and make the more waste there is to be recycled. A growth industry with no end in sight.
The real fly in the ointment is that Government is the only organization that can take a large monetary risk on something new. No business would accept the level of risk involved.
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Wordle 1,009 3/6*
⬜⬜🟨⬜🟨
🟩🟩⬜🟩⬜
🟩🟩🟩🟩🟩
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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⬜⬜⬜⬜🟨
⬜⬜🟨⬜⬜
⬜🟩🟩🟩🟩
🟩🟩🟩🟩🟩
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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Wordle 1,009 2/6
⬜🟨⬜🟨🟨
🟩🟩🟩🟩🟩
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Wordle 1,009 3/6
⬜⬜⬜🟩⬜
⬜🟩⬜🟩⬜
🟩🟩🟩🟩🟩
All greens 💚.
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Wordle 1,009 4/6
⬛🟨⬛⬛🟨
⬛🟨⬛🟩⬛
🟩⬛⬛🟩⬛
🟩🟩🟩🟩🟩
Wasn't sure I was gonna make it... but booyah.
Jeremy Falcon
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Wordle 1,009 4/6
⬛🟨🟨⬛🟨
⬛🟨🟨🟨🟨
🟨🟩🟩🟩⬛
🟩🟩🟩🟩🟩
Ok, I have had my coffee, so you can all come out now!
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Wordle 1,009 5/6*
⬛🟨🟨⬛🟨
⬛🟩🟨🟨⬛
🟩🟩⬛🟩⬛
🟩🟩🟩🟩⬛
🟩🟩🟩🟩🟩
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Update: I made a solution by extracting the deflated stream from the zip using a utility I wrote, and then working with that stream instead of the entire zip contents. The whole mess is here.[^]
I just made a stupid. I spent a lot of time and effort getting an ESP32 widget to be able to update its firmware from a .zip file only to realize - after I got it all working - that zip files aren't practical for this, because they store all the information you need first at the END of the file. So you can't stream it over a serial port without reading the whole damned thing first, which isn't practical on this device. I got as far as emailing a colleague about it, producing a github repo and beginning to write an article here before it dawned on me.
Hours I can't get back. Oh well, you can still use the tech from something like an SD card.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
modified 24-Mar-24 12:08pm.
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I believe in you. You can make it work.
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I can, just not with the .zip file format.
Which I should have known upfront, considering I wrote the code the parse the format.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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Stream it in reverse!
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Can you somehow do a 'pre-zipper' that determines that information and redundantly stores it at the beginning of the file somehow?
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What I can theoretically do is extract the compressed stream from the zip, store that, and just decompress that.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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What you probably need is a stream encoder like ALDC. I see there is a C implementation[^] for it but I don't know if it will fit your needs.
Mircea
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I just extracted the compressed stream and used that.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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Why not zip each file individually and group of small files as 1? 🤔
Graeme
"I fear not the man who has practiced ten thousand kicks one time, but I fear the man that has practiced one kick ten thousand times!" - Bruce Lee
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I did. The central directory for a zip file is at the end of it, regardless of how many files are in the archive.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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this error run my project
"
System.NullReferenceException: 'Object reference not set to an instance of an object.'
System.Data.DataTableCollection.this[string].get returned null. "
Pls help fixed my error
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The lounge is not a place for asking such questions.
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Aso PIEBALDconsult said, this should be asked in the proper place: Ask a Question[^]
But ... we can't solve it from that single line of code because it's not the source of your problem. Let me just explain what the error message means: "You have tried to use a variable, property, or a method return value but it contains null" - which means that there is no instance of a class in the variable.
It's a bit like a pocket: you have a pocket in your shirt, which you use to hold a pen. If you reach into the pocket and find there isn't a pen there, you can't sign your name on a piece of paper - and you will get very funny looks if you try! The empty pocket is giving you a null value (no pen here!) so you can't do anything that you would normally do once you retrieved your pen. Why is it empty? That's the question - it may be that you forgot to pick up your pen when you left the house this morning, or possibly you left the pen in the pocket of yesterday's shirt when you took it off last night.
We can't tell, because we weren't there, and even more importantly, we can't even see your shirt, much less what is in the pocket!
Back to computers, and you have done the same thing, somehow - and we can't see your code, much less run it and find out what contains null when it shouldn't.
But you can - and Visual Studio will help you here. Run your program in the debugger and when it fails, it will show you the line it found the problem on. You can then start looking at the various parts of it to see what value is null and start looking back through your code to find out why. So put a breakpoint at the beginning of the method containing the error line, and run your program from the start again. This time, the debugger will stop before the error, and let you examine what is going on by stepping through the code looking at your values.
But we can't do that - we don't have your code, we don't know how to use it if we did have it, we don't have your data. So try it - and see how much information you can find out! This is one of the most common problems we get asked, and it's also the one we are least equipped to answer, but you are most equipped to answer yourself.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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I watched just one Korean TV series* and suddenly it's recommending Japanese animations (with English subtitles) and Filipino Tearjerker dramas.
Don't really understand why, but it smells a bit racist - as if Netflix is assuming that "Korean == Asian == Japanese == Filipino == Chinese" which is total bs.
* "The Silent Sea" - dubbed into English with subtitles for the Korean language bits. Not bad at all, well acted for the most part and sufficiently suspenseful.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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The Silent Sea is excellent. I suspect you are seeing suggestions based on what others viewed afterwards. It's probably not anything more sinister than that.
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