They chose that class. The syllabus stated what they are going to study. Having an expert in a subject explain something you want to understand, is what you pay for. There are many ways of expanding your knowledge. To each his own.
Great article. Nice review... Helps to see the mathematical equations and numbers, like Bernoulli and Reynolds's,
compared to graphs and flow tunnel simulations.
Here is a fun sailboat race simulator. It's very simple, but pretty realistic especially for open ocean racing. You can use their default race course, sometimes join a planned regatta, or make your own. (It was great during COVID, to try racing across the oceans, or around the world. It's in real time, so you might not need to change anything for days If you are in the trade winds, and open ocean, but then when you get closer to land, things get "Western" very quickly - just like with a real boat.
It's called SailNavSim. (Learned about it from HN.)
If need to, keep your eyes open for phones that you can use Graphene on - it is the easiest, possibly safest, de-googled operating system. And very easy to install.
Great article about the Mosquito! Thanks.
That's yet another HN rabbit hole!
It confirmed a friend's war story I heard, first hand - about escaping from a German POW camp near Berlin - then proceeding to Copenhagen, with the help of the Danish underground, stealing a rowboat from a German yacht, rowing to Sweden at night. The wounded one stayed in Malmo, the other two continue to Stockholm. There they went to they Polish embassy. One stayed there, the other was sent to Scotland that night in a mosquito. (Later he went to London, then dropped by parachute behind enemy lines.) Now it's the first time I read a story to verify that other first hand account! (I obviously summarized an amazing tale.)
That's great. Thanks. When you start watching it you think, it will be too long, but it gets better and better. Everything goes back to Einstein. YARH!
Yet another rabbit hole! It's amazing we have any time left to do anything after reading HN.
Brilliant write up. I remember using the old ones, and only last year found the oxo model. truly amazing. Many important lessons in product design in that article; with the most important in the last sentence - it has to work!
You're right. just look at the devolution of Windows by generation. As everyone on HN comments on, how terrible Windows 11 is compared to windows 10, compared to windows 7, etc. (bloat, unnecessary apps, intrusiveness and so on.) Advertising? WTF?
We all thought - when we were running Windows 3.11, imagine if we had a faster computer ?!
I assume you know about 2600?
Its a very fun and global hacker community, with monthly meetings, yearly conferences, a radio show, and great magazine. 2600.com
Your "on phone" or desktop synthesizer is amazing. Thanks for that. I shared with my more musical synth type friends. Your program reminds us, of how amazing music can be, with such a simple backbone. (Just as in the case of a harmonica or whistle, where a few notes, can invoke a range of emotions.)
So easy to see the results of ones own experimentation.
Your rant was great. It leads one to ponder, among other things - ants. They produce formic acid. Ants like to live under houses, especially in the late summer. How much formaldehyde fumes do they produce? Does it come up the cracks in your foundation?
(Formaldehyde is also a preservative - but that's for another day.)
I get results everytime. Maybe not the cheapest. But it's something, and it's fast...
Very fast. (Compared to going to a website.)
With a very simple sentence full of acronyms that we all use buy now, it is a fun experimental tool. (Then clicking through the Google link, you can actually continue and book.)
But, I agree, Skyscanner is awesome.
So I've tried a few variations on ticket searches. Pain language great. Two fliers great, can specify times and stops.
Trans continental with connections, works - specifying destinations and round trips
Worked great too.
Local flight in Western Canada, came up with options, but very expensive, and in USD.
I don't use Google for flights - but your tool provides a very efficient way of communicating to google, to get what you want.
One thing I noticed so far, that Google prefers Lufthansa over KLM on search results.
Anyway, great work. Keep us informed!
Granitic rocks on Mars!
Here is what I told my kids - (although not a geologist, but decades working in prospecting, exploration and mapping):
The white rock is absolutely amazing!
Look at all the others. They are glassy, vuggy - volcanic looking with air pockets and slidy shiny sides.
The white one has black crystal like growths - pyroxene crystals (?) -as suggested in the NASA linked paragraph; found in a white mass. It looks like granite.(Silica based?) Which is a deep under 'earth' slow growth rock - as opposed to the volcanic looking ones which are faster cooling surface rocks.
Like the granite of New Hampshire, deep, old rocks exposed to the surface by millions of years of erosion. (Or the uplifting of deep rocks, on the west coast)
How did it get there? If it was on earth, you could say glacial transfer and deposition. And why is it broken? Freshly exposed inside with sharp edges?
What a great link. Thankyou.
There is still so much to learn from the microbiome. Working with contaminated sites, I have seen bacterial adaptations to the most l nastiest sites, almost always improving the toxicity of the soil. (There are rare exceptions.)
There is a very fun, and somewhat realistic global sailing navigation program.
Look up sailnavsim.
It is a sailing simulator not visual. (Except for maps.)
You can join races, start a random race, and/or create your own races. By yourself, or against others.For example during COVID, we organized a open race from England to South Africa. The race runs in real time, so for open ocean races, depending on where you are going, it can take weeks. You leave your boat at a certain heading, then can leaner three computer - for an hour, a week, or whatever. But the wind can change. Using a wind map( link provided) you adjust your headings. Then check your SOG( speed over ground). If you're not careful, you might actuality go backwards. Also avoid Islands in the middle of the ocean( zoom in on the map.)
So, in terms of navigation is quite realistic.
That was a fun read. It's interesting to think that they would leave it attached. Indeed, what could you do with that?
Did you find the unit that the wires go to? Then you could open that up and see what chips, sensors etc are in there.