|
Here's a question, how do you maintain gravity in a Dyson Sphere (assuming you do not have "artificial gravity")?
Never underestimate the power of human stupidity -
RAH
I'm old. I know stuff - JSOP
|
|
|
|
|
I would suggest spinning it. You'd wind up with only a ring world's amount of living space but (like 640kb) that should be enough for anyone. It would probably make for an interesting typography in that "down" might not be perpendicular to the surface, but hey, you've already solved the hard problem of making and spinning it. This is probably a minor issue, comparatively. On the plus side there's no need to worry about artificial gravity failures sending the atmosphere and other loose material, like people, into the sun.
The "unused" sides, the axis poles as it were, could be for energy harvesting and such. They'd also make fairly good access points for ingress/egress of the sphere.
|
|
|
|
|
From the CP newsletter
Astronomers are on the Hunt for Dyson Spheres - Universe Today[^]
Gary Stachelski 2021 wrote: but the amount of physical material that would go into making one would be prohibitive
There are all sorts of engineering problems, economical problems, and political ones as well. Those are pretty standard constraints on all fantastical theoretical constructs. Even much smaller ones.
Consider this - lets say one claims that the material in the solar system is enough. How do you dismantle Jupiter without destabilizing the entire star system.
Or what political system must the world have in place such that it would remain stable enough for perhaps hundreds of thousands of years while this was happening.
Those who want to believe often rely on yet more fantastical stuff to avoid such problems.
|
|
|
|
|
|
|
Startups will claim anything...
Hogan
|
|
|
|
|
When I see any article where a startup is making tall claims my mind goes straight to Theranos, FTX, Nikola and such.
|
|
|
|
|
The problem and solution reminds me of analog computing but using light instead of electricity.
Interesting that both quantum and this light method both look for minimal energy states to define the best possible solution to the problem.
|
|
|
|
|
I've come to understand quantum computing to be a bit like Plinko on the Price is Right.
You set up your equation which can metaphorically be represented as placing the pegs into the board and then setting all the dividers for the troughs the chip may eventually fall into.
As a chip dropped in plinko settles to the lowest entropy of a trough. "Execute" is dropping a bunch of chips into the board and letting them settle entropically, then your answer is in counting the troughs.
There are some ways this metaphor doesn't play but some ways it plays really well.
|
|
|
|
|
John F. Woods once said : “Always code as if the person who ends up maintaining your code will be a violent psychopath who knows where you live.”.
There should be a similar saying in regards to writing (non unit) test cases.
"Always write test cases as if the person who ends up testing your software is a 5 years old without any knowledge of the software"
I'm going through some test cases on a large software and the tests cases are just a description of what I need to do.
In reality, I have to do about 20 different steps to get there and go through thousands of records (SQL) to find one record that will work.
Seriously, do you know of any good white paper on how to write good test cases ?
groan.
CI/CD = Continuous Impediment/Continuous Despair
|
|
|
|
|
Maximilien wrote: John F. Woods once said : “Always code as if the person who ends up maintaining your code will be a violent psychopath who knows where you live.”.
This... this right here... is gold. 
Maximilien wrote: In reality, I have to do about 20 different steps to get there and go through thousands of records (SQL) to find one record that will work.
Sounds like someone who wrote those tests didn't know squat about writing tests (which is a lot of people). A unit test should never connect to a live resource. Not only is that non-deterministic, but you can't run 1,000s of tests quickly that way.
Maximilien wrote: Seriously, do you know of any good white paper on how to write good test cases ?
Wish I could help with that buddy. For me, it was a combo of coworkers helping and trial and error with Stack Overflow Googling.
Jeremy Falcon
|
|
|
|
|
we're not running unit tests; I don't know how I could integrate that in our ancient/antiquated codebase 
We're doing functional and integration testing and acceptance testing.
It's just hard to change the inertia; that's why I would need some good resources to help me suggest some changes.
Thanks for the moral support.
CI/CD = Continuous Impediment/Continuous Despair
|
|
|
|
|
Ooops. Totally missed the non-unit part. 
If these are integration "test cases" they sound more like documentation for manual steps than anything else then. Probably could've achieved the same thing in a README.
Jeremy Falcon
|
|
|
|
|
Would test automation help?
Had used Selenium framework, for a web application, some years ago, and our test scripts automated all the steps. There must be a similar framework for desktop apps.
|
|
|
|
|
My Sr. partner is the best when it comes to breaking things:
0: Entering non-numeric chars where numbers should go or invalid numbers such as 1,1.2 or 1.1,2 (fun fact, letters up to f will happily identify as numeric)
1: Extremely long text/numbers, special characters, 0s as divisors
2: Leaving 'required' fields blank
3: Using the back button in web apps
Of course, there are some situations you can't predict. That's what users are for! 
"Go forth into the source" - Neal Morse
"Hope is contagious"
|
|
|
|
|
and/or
- cancel dialogs
- close app (with click on "X") while db is in edit mode
- kill app with task manager while someone is editing something
- use special - non ascii - chars where it is not expected
- simulate high load with endless read/write operations
- change screen size/resolution to unusual values
modified 13hrs ago.
|
|
|
|
|
It comes down to my biggest beef with tests and that's being only as good, generally, as whoever wrote what they're testing.
For one, some jabroni didn't really write tests for your system. They wrote some documentation.
If you can't run them in an automated fashion - without manually hunting records down and manipulating data? Then they simply aren't tests and if the person's task was to write tests, they 100% failed that task.
You write the test so that it stages the data you know will work and then delete that data post-test.
[OneTimeSetup] / [OneTimeTearDown] are the decorators for NUnit to do stuff like that.
When we started writing a bunch of tests, we settled structuring things linearly like the following with regions for:
Class Members
Assemble/Setup
Act/Invoke
Test Asserts
Cleanup
|
|
|
|
|
Get some experienced testers to bash it hard - much better than test scripts IMHO - writing(and testing / maintaining test scripts) is often harder than coding the application
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
|
|
|
|
|
It seems like you're suggesting that getting experienced testers to thoroughly test a product is more effective than relying solely on test scripts. This approach can indeed provide valuable insights and uncover issues that might not be caught through automated testing alone. Your quote by Hunter S. Thompson highlights the importance of thoroughness and vigilance in testing to avoid pitfalls.
|
|
|
|
|
For at least 30 years, we have had/practiced the "5-year-old robustness test":
Put the kid in front of a keyboard and a screen, and tell him: Do anything you want. If you make it lock up, and can show daddy/mommy what you did, you'll have an ice cream cone!"
I know of a few ice cream cones awarded that way 
Religious freedom is the freedom to say that two plus two make five.
|
|
|
|
|
I like it.
"A little time, a little trouble, your better day"
Badfinger
|
|
|
|
|
Maximilien wrote: In reality, I have to do about 20 different steps to get there and go through thousands of records (SQL) to find one record that will work.
Why not edit a single record so it will work?
I'm currently doing a project where we're rewriting an old VB6 application that used to use a dBase database.
It's SQL Server now, but everything is not what you'd expect (everything is char(x), even bools, which have "Y" or "" (and sometimes "N"), except some ints, which are int or decimal(x,y)).
Lots of magical numbers and strings too.
Some fields even are like "X X " in which the first X means "option 1 should be used" (whatever option 1 is), the empty second and third position means those options are off and the fourth X means option 4 should also be used (the software only uses four options, even though it's a char(10), also it's not always X, sometimes and option can be, for example, "S" for small or "L" for large, etc.).
Anyway, finding a row you can use and writing a WHERE clause is a pain, so I just edit the top row so it'll fit my test/use case.
|
|
|
|
|
1) Mind internationalization. Is your app translated? In how many languages? Serious work to do if this number is greater then 10.
2) How does the GUI looks like on a native Chinese (Traditional or Simplified)/Japanese/Korean PC?
3) Input long texts in various languages, with many specific characters. Special care when comparing and processing texts - in which culture?
4) Did you specify a culture when installing the app DB? If not, the SQL server default one will be used. Try different cultures/collations etc.
5) Input/use numbers in various cultures, alternating decimal/thousand separators etc.
6) Input/use datetimes in various cultures.
7) Set the date of the PC to 29th february in a leap year and test app functionality.
8) If you read text from disk/stream, create test files containing binary data (e.g. 0x1A/EOF - can your app read text beyond that byte?). Or create test files that have \r\n or only \n as end of line etc.
|
|
|
|
|
Wordle 1,060 4/6
🟨⬜🟩⬜⬜
⬜⬜🟩🟩⬜
⬜⬜🟩🟩⬜
🟩🟩🟩🟩🟩
|
|
|
|
|
Wordle 1,060 4/6
🟨⬜🟩⬜⬜
⬜⬜🟩🟩⬜
🟨⬜🟩🟩🟨
🟩🟩🟩🟩🟩
Bad third guess.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
