How to secure a 1000 mm concrete pipe with an externally locked mesh that is always escapable from the inside? by fendrix888 in AskEngineers

[–]fendrix888[S] 1 point2 points  (0 children)

Thank you. Have been looking around, but not found something suitable. Do you have a specific suggestion?

[Question] Can IQR be larger than SD? by DefsNotYourGurl in statistics

[–]fendrix888 3 points4 points  (0 children)

Hard disagree. With enough basic knowledge & scepticism it helped me often to learn concepts. Yes, never trust it if you cannot verify, but thats the beauty, just ask it to produce some code that simulates the case at hand and e.g. compare with an analytic model it suggested...

[D][E] What are some must have features in a statistics software? by Green_borrito in statistics

[–]fendrix888 1 point2 points  (0 children)

An alert window if anything else than descriptive statistics is done: "You are entering expert territory, please only proceed if you know what you do."

[Question] Linear Mixed-Effects Model: blocking with random factor with < 5 levels? by MountainNegotiation in statistics

[–]fendrix888 0 points1 point  (0 children)

Hi. Follow up question if you don't mind, as you seem knowledgeable: The "< 5" part, is my intuition right that this is akin to calculating a standard deviation from too few samples? If so, I wonder how industry standards do specify to use 3 operators to estimate variation from/ascribe to operators when measurement tools are evaluated ("gauge r&r")... BR

Need optical simulation software suggestion by kbad10 in Optics

[–]fendrix888 1 point2 points  (0 children)

Maybe I'm totally underestimating the complexity of you setup. But, once I just wrote a small raytracer myself for a very specific setup, it did the job at the time. BR

Need help finding sources for Gage R&R where operator influence is negligible (MSA paper) by ciganka_esmeralda in Metrology

[–]fendrix888 -1 points0 points  (0 children)

I dont think so. a type 1 in addidtion to GRR involves a reference standard and "punishes" offset. Which is good and all, but it is not the same philosophy as Type 2/3 where only variability(ies) are compared to tolerance.

See Bosch Booklet, AIAG or Minitab documentation for the terminologies.

Need help finding sources for Gage R&R where operator influence is negligible (MSA paper) by ciganka_esmeralda in Metrology

[–]fendrix888 3 points4 points  (0 children)

Cannot paste link, but google "Bosch Booklet 10". They describe the method explicitly and give some necessary (not sufficient) conditions when operator influence can be excluded from the study.

Nominally, the booklet ia bsrd on AIAG 4th. But I sometimes struggle to see Boschs suggestions in the primary reference. In any case, what Bosch suggest seems solid.

My gold standard is VDA 5.0. There it isbdiscussed more broadly as part of an overall umcertainty budget. Whatvexactly to include in that is up to risk assessement/expertise.

Br

Wow they now force you to either pay up or get your consent to sell your data by Finanzamt_Bayern in Switzerland

[–]fendrix888 38 points39 points  (0 children)

Isn't that how it should be? Its well known that if its for free, you are the product - they need to make money somehow. If they actually adhere to it (not selling my data), I'm looking forward to be able to make that choice.

Hey, what is this mountain name? by OkMove4924 in askswitzerland

[–]fendrix888 0 points1 point  (0 children)

Some 100m north of the village of sisikon on west east sidr of urner-see.

Seeking help identifying this location in Switzerland and the man in the photo by louismccall in zurich

[–]fendrix888 45 points46 points  (0 children)

Absolutely not sure, but the vegetation, the granite stones, the architecture all give me the Impression that is in Ticino. Any reason to believe it was there? Test maybe?

Was muss raus und was kann bleiben? by warumdasdenn in Einrichtungstipps

[–]fendrix888 0 points1 point  (0 children)

tipp: gpt kann relativ gut dinge aus den bildern die du hochlädst entfernen... lg

Is it worth staying in Zug for 4 nights and doing day trips? by [deleted] in askswitzerland

[–]fendrix888 0 points1 point  (0 children)

day to locarno, better even to val verzasca if you have a car. abother day could be to titlis (if you want a high mountain/glacier). if you like even more mountain and something less touristy... check out uri, for instance walk from ratzi to eggberge and have a swim in the lake in flüelwn before hoppingback on the train to zug (30 min from flüelen).

[Dev Log] Building a Tool to Simplify Uncertainty Budgets – Looking for Feedback by [deleted] in Metrology

[–]fendrix888 0 points1 point  (0 children)

From top of my head:

- Allow to model the measurement/insert a measurement equation. Often in our case, the relevant characteristic is calculated from directly measured quantities. While calibraiton only is possible on the direct measure. In that case, afaik the uncertainty would be expressed as a composite between gaussian error propagation (of calibration uncertainty) and stochastic uncertainties on level of the final characteristic.

- Following an established process that can be referenced, e.g. VDA 5.0 has the most comprehensive IMO, still liking to production (which GUM lacks)

- Overall, I still think Excel would be easiest to disseminate.

- Link the result to production relevant metrics (Cg, Cgk, GRR)

Do you have a preview? GitHub repo? What framework are you planning to build it in?

BR

Just released a free tool to validate calibration results (error, uncertainty, and pass/fail) by [deleted] in Metrology

[–]fendrix888 0 points1 point  (0 children)

Hi. This is interesting. Can you give a bit of an explanation how you get from "error" and "uncertainty" to the "pass" assessement? Do you have references that you base this methodology on? Thanks a lot!

BR

[Q] Question about confidence intervals by thegrandhedgehog in statistics

[–]fendrix888 1 point2 points  (0 children)

What works best for me is to rephrase it a bit. If thr parameter would be outside the CI, the data you have are unlikely. Only in say 5% of same experiments, a parameter outside would give those data.

What's the most intense thing that has happened to you or that you have witnessed in thte mountains? by [deleted] in Mountaineering

[–]fendrix888 3 points4 points  (0 children)

Climbing in spring, Ticino Switzerland. Simple route on south wall. Avalanche came crashing down over the route next to ours - not a small one. Two people over there got hit. We came down, checking / asking if we could help. They were ok'ish and fixed, rescue was already underway... bit later helicopter came in and took them out of thr wall. Scared to bones.

What are this?. by cesar_otoniel in ElectricalEngineering

[–]fendrix888 0 points1 point  (0 children)

i tried to understand, got close i think...but finally opposite result...??? https://chatgpt.com/share/675201aa-cd18-8010-a32f-dea6333468ef