Roco 78494 ÖBB Class 1245 (527-5)

[wpsearch] New 27April2014, updated 15Sep2018 I thought I had decided to buy only electric locomotive models with external rods. So I fell in love with the beautiful Swiss SBB Ae 3/6 II. I had studied some Roco catalogues containing the Austrian ÖBB class 1345 without noticing it. Not until Roco did a replica of a red model, the […]

Modelljernbanesider (også tog generelt)

13feb2014. Oppdatert 13Jul2024. Denne siden er i gruppa MODELS. Summary in English: Here is a list of the most important Norwegian(++) (model) railway internet pages and forums. Lenkeliste Norsk MJ Forum: forum for jernbaneinteresserte, lagd av «en gjeng med togentusiaster»: www.norskmjforum.no. Forum: www.norskmjforum.no/forum/. Jeg tror det betyr at MJ ikke står for modelljernbane (lenger)? Modelljernbaneforeningen i Norge (MJF): www.mjf.no/. […]

NMJ derailments

New 11Feb2014, updated 25July2021. This blog note is in group Models NMJ rolling stock derails too often This is not NMJ’s fault. They of course adhere to the DC wheel specs. The discussion below is interesting, but for the final solution go to chapter Change wheel set. I have problems running the Norsk Modelljernbane rolling stock […]

Rich interface component modeling

This page is in group Technology. Started work on this 1Feb2014, probably finished now (updated 7Jul2020 (table)) Intro In this note I will describe two articles about software components. The article «Component Models for Reasoning» (Seceleanu, Crnkovic) [01] and «Tool support for the rapid composition, analysis and implementation of reactive services» (Kraemer, Slåtten, Herrmann) [02]. […]

Connecting catenary wires?

New 1Jan2014, updated 2Feb2014 This blog note is in group Models In this short blog note I will discuss a matter I have only just realised: modern model train catenary wires don’t need to carry electricity. And they haven’t needed that for quite some years. I have just lagged behind. But then it’s only recently […]

Eventual concurrency

Started 12Sep2013, finished 19Sep2013. Updated 28Jan2014 This page is in group Technology. Intro In this blog page I will try to understand how so-called «single threaded» software architectures based on «event-loop concurrency» and callbacks (where mostly all blocking is «evil»), differs from light-weight processes that communicate using channels  (where any needed non-blocking is built explicitly (or by […]

Pike & Sutter: Concurrency vs. Concurrency

New: 25July2013, updated 29Apr2024 This page is in groups Technology and My Go (golang) notes. Updates An aside on async/await 28Apr2024. Rob Pike, at GopherConAU 2023 gave a lecture called «What We Got Right, What We Got Wrong» (here). He talks about Go concurrency at 11.30. My point here is his aside on the increasingly popular async/await paradigm. […]

SBB Ae 3/6 II revision dates?

Several sellers on eBay have helped catching the revision date on an SBB Ae 3/6 II that they sell, when I have been as unpolite to ask them about it. Some have not responded. The sellers that did respond found a magnifying glass and read the tiny print and sent it to me. I have […]

IEC 61508 and (safe?) concurrency

25 April 2013 (last edit 21June2013) This page is in group Technology. Background Concurrency on Wikipedia or [3]. This note is a branch from 065. 035, 023 are perhaps also relevant. My XCHAN paper is a contribution to making concurrency easier, trying to merge the how SDL and CSP may view communication (Also discussed in 056). If you checked the references […]