Sushi chefs spend years learning the correct feel of the fish - when it's warm enough, when it's slimy. Japanese are taken aback when they are forced to wear gloves for "safety", which at least in that case is entirely counter productive.
All the things you wrote, but also quality. Quality is a giant issue. Garbage usability. Excel is the only Microsoft product I thoroughly respect. The amount of things you can't do in PowerPoint for example is mind blowing.
Excel has many classical dialog boxes with text that becomes too small on high resolution displays. May be they fixed in newer versions (mine is 2021).
Excel is better than other spreadsheet alternatives I have seen though, but is mo longer a software I call trouble-free.
Helium has 150mW/mK vs Argon ~18mW/mK so you can't replace it.
The only alternatives to Helium are Neon, which is 3x worse and much more expensive, and hydrogen. However, hydrogen is flammable so it's a very bad idea to use it in a fab which has extremely poisonous gases and needs a cleanroom environment. A fire would ruin your whole factory and kill your engineers.
Think of things like your preferred units (meters, kg, cups, tablespoons, milliliters). Or, do not suggest recipes with x ingredient. Language preferences. Etc etc etc.
There's several options, and in the future there will be even more. Labs like Mistral, Sakana AI already have good products; they will only get better.
Nice overview. Some of the descriptions are quite thin on details, like "new model by x", or "latest model by y". Well of course it was new at the time but that doesn't really add information.
Yes but how do you do that? that magical third electrode sounds harder to make than the original problem.
Edit: I think I get it now, it's a chemical reaction. By applying a voltage with some polarity to the 3rd electrode you can run the reaction in reverse. Still very hard to achieve because you have to make sure the reactions happen at the same rate with the same efficiency, which is far from trivial. This must be a very high end sensor for all this effort to make sense.
An oxygen molecule does some chemical reaction on the sensor electrode that releases an electron, maybe it's made of iron and turns into rust. If you supply the same current to another electrode to do the opposite reaction, maybe one made of rust that turns into iron, it balances.
The sensors must be consumable with a certain lifetime.
Zinc can do this too. But I like silver, its oxide has decent conductivity.
One of the common arrangements on a basic two-electrode sensor is to have one gold electrode to make contact with the electrolyte, and the electrolyte provides conductivity to a sacrificial silver electrode. With electrolyte exposed to the atmosphere through an oxygen-permeable membrane.
As oxygen makes its way through the membrane, it is consumed by the silver at a steady rate and equilibrium is achieved relative to how much oxygen is in the atmosphere. This generates a steady current which is amplified to move a needle on a gauge, where there are knobs to adjust the meter until it displays the correct amount of oxygen during calibration against a known concentration. And must also be calibrated to display zero when there is no oxygen.
Eventually even if the membrane never gets fouled the oxidized silver builds up in the electrolyte chamber and response deteriorates so maintenance is needed. Remove the membrane, polish the silver, put in fresh electrolyte, new membrane, and re-calibrate.
Adding a third electrode opens up a number of further possibilities.
One of them is the option to use an additional inert gold or platinum contact or a salt bridge as electrical reference against the original gold or silver as the sensor. Plus using a more complex circuit than a plain amplifier, apply controlled responsive current to the sacrificial silver at the same time. So rather than directly amplifying the current produced by different concentrations of oxygen existing in the electrolyte (and waiting for it to equilibrate), instead with 3 (or 4) electrodes the ionic silver concentration in the electrolyte can be maintained electronically in a steady state, and as oxygen permeates, the current required to replace the consumed silver is designed to make a dfferent kind of meter move the needle the same way as above. In this way the oxygen concentration in the electrolyte varies to a much more limited extent compared to waiting for it to be depleted from a high amount to zero before the meter will bottom out.
This can be equivalent to constant-ion electrochemical titration.
Disclaimer: I always like to handle things like this like lives depended on it, because lives depended on it.
> Disclaimer: I always like to handle things like this like lives depended on it, because lives depended on it.
You do the best you can. If you can only make inaccurate sensors, make inaccurate sensors. If you can make accurate sensors, make accurate sensors. If they're much more expensive, make both. If your competitor has more accurate sensors, learn how they work.
I've been to the Mediterranean several times. They eat a ton of (delicious) super oily food, sausages, meats, eggs, fish (often fried or deep fried), salty cheeses, greasy stuff, tons of white bread, lots of wine. Fat chance to find someone eating avocados, kale, or quinoa, and proteins are not at all minimized.
The Mediterranean diet is like a Californian wellness type of person's idea of what the actual Mediterranean diet is.
Countries in the mediterranean have been developing the same bad habits as elsewhere. People in the Mediterranean need to go back to eating a Mediterranean diet.
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