I stumbled upon this site when I was looking for a Borland C++ version that compiles natively in DOS. I found PDFs of the complete set plus thousands of other subjects for old hardware of all sorts.
There are a bunch of PDFs for IBM service/reference manuals/catalogs as well.
I thought you guys might find something of interest there.
When I did mostly web development, online magazines like Smashing Magazine or CSS Tricks, helped me a great deal to learn and stay up to date in this ever-moving industry.
Now I'm doing a lot in infrastructure, microservice architectures, systems programming, etc. and I miss resources of similar quality in this area. Or let's say: I can't find some. It's either all over Medium, in personal blogs, or somewhere lost in the DZone jungle (DZone actually comes close to what I look for, but I see e.g. Smashing putting a lot more care in curating and editing).
Do you have any recommendations?
https://preview.redd.it/49w428fsont51.jpg?width=1173&format=pjpg&auto=webp&s=6b2b9a826c6ca1c8bb826014753f45f26054480e
The above link demonstrates the software which is based on machine learning.
https://youtu.be/qxSnFExiDJE this show the difference between animating with keyframed animation approach and using JALI software both in quality and time required.
you can either access it using ftp which shows you all files and mostly has english folder names: ftp://ftp.hs-niederrhein.de/pub/
or you can use the web interface which is fully german but includes descriptions for each file. however it doesn't list all folders:
http://ftp.hs-niederrhein.de/~ftp/
using google translate for the web interface also works pretty well. (probably the most useful link) (you will need to right click and save instead of just left clicking when running the site through google translator it seems) https://translate.google.de/translate?hl=de&tab=wT&sl=auto&tl=en&u=http%3A%2F%2Fftp.hs-niederrhein.de%2F~ftp%2Findex.htm
direct link to the games folder (imo the best part) including english descriptions: https://translate.google.de/translate?sl=de&tl=en&u=http%3A%2F%2Fftp.hs-niederrhein.de%2F~ftp%2Fpcw9ga.htm
From what I’ve seen, the home-made springs for DIY magazines are wound somewhat arbitrarily. That can’t possibly be good for reliability. We could probably improve the reliability of home-made magazines by taking a careful, scientific approach to spring design. I’m thinking about creating a piece of free software similar to “FED17” (a software product produced by Hexagon, a German company, Google it) to achieve this. Such a piece of software could eventually autogenerate 3D printable, notched spring jigs given design parameters. Unfortunately I have no background in spring design (or engineering in general), and I have many questions. I figure here is a good place to ask them…
- Section 2.1.1 of this paper provides a formula for analytically computing the strain energy of the sort of springs found in AR-15 and Glock magazines. It could be used to produce a stress/strain plot for theoretical spring configurations. Is a stress/strain plot alone all that is needed to create a spring that duplicates the behavior of a “real” magazine spring? Should other quantities/plots be calculated? Can these quantities/plots be generated numerically given the strain energy equation in the paper?
- For stress/strain diagrams of prismatic springs can I take stress to be F/A where A is the cross sectional aria of the spring as measured from the center of its wire?
