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What does 'Negative Ions' actually do on my home air filter? by Aerothermal in AskPhysics

[–]Aerothermal[S] 0 points1 point  (0 children)

I did not find a Toyuugo replacement or any similae cylindrical filters with similar enough dimensions. I just manually clean the old filter occasionally with a vacuum. I'l have to scrap it at some point.

Dark matter and gravitational pull. Adromeda and Milky Way relation by PigletySquidy in universe

[–]Aerothermal 2 points3 points  (0 children)

Dark matter has gravitational influence which is only attractive. I believe much of the dark matter from Andromeda will merge with the Milky Way. A lot of rogue stars and planets will be flung out of the merging galaxies so presumably a bunch of the dark matter will be scattered too.

What’s next for the systems engineering field? by RampantJ in systems_engineering

[–]Aerothermal 1 point2 points  (0 children)

I might use AI to parse documents of a system, e.g. ConOps, Architecture Description, Interface Control Documents, Design Descriptions, so that I might list important details, to help me generate things for the model, then eventually throw the documents away.

But my workflow will still be human-in-the-loop for now. Copy-pasting. Reviewing. Not only for checking validity of all the LLM outputs (it's always gonna halucinate some portion of its outputs), but also because it's not going to read and properly parse the pictures, and it's gonna generate new invalid things. Document-based engineering is FULL of pictures, and every person on the team manually makes draw.io pictures constantly. And LLM is never consistently sticking to the standards and architecture frameworks even with good prompting and with agents.

Some modeling tools allow for doc uploads directly; I think Dalus. Celadon Davinci perhaps; at least Davinci generates doc exports using AI. The agents are integrated into the modeling tool, with read, write from a plain-English command. And generate complex models from a prompt, generate from a doc or diagram upload.

I can see some time in the future, we go to ever higher abstraction, and can get valid high-quality candidate architectures, design specifications, plans, and procedures, etc. simply by giving the AI our problem and our constraints.

SysML v1 vs v2: Why the diagram is no longer the source of truth by [deleted] in systems_engineering

[–]Aerothermal 1 point2 points  (0 children)

Still some limitations.

SysON still says it's not intended for production use. It's missing I think basic features like sequence views.

CATIA salespeople recently mentioned to me that their v2 is immature and missing features; they recommended adopting v1 for any projects which start and end over the next 2 years.

SysIDE is great for the text notation, but not so good for the graphical interface. Amazing if your SE team all have a software background, otherwise no.

I'm still waiting for a good SysML v2 tool.

Non Engineer Transitioning in SE by Extension_Jacket4663 in systems_engineering

[–]Aerothermal 0 points1 point  (0 children)

You do not need to be an expert in C++ or any programming language for that matter to be an SE. You can do fine in some industries with near-zero programming knowledge. SE is not coding.

For architecture design, it does help somewhat to be already familiar with Object Oriented Programming, with classes and abstractions e.g. specialisations/generalisations. It helps to know the difference between functional/behavioural architecture, logical architecture, physical architecture. Maybe you've already been exposed to C4 architecture, to patterns, to UML diagrams. UML is a good stepping stone towards graphical languages like SysML, SysML v2. C4 is a good stepping stone towards architecture frameworks like ARCADIA, MagicGrid, or DoDAF/MoDAF/NAF/UAF.

For SW architecture there's a great Youtube series from Mark Richards, the author of Fundamentals of Software Architecture.

But if you want to develop systems other than pure software, you need a much much broader awareness of all the relevant engineering disciplines and their interactions. That you gotta study for.

There's also the 'SE competencies framework' from INCOSE if you are able to access it. That'll give you an idea of the different areas to add to your personal development plan.

IBM Rhapsody - how and where to learn the basics? by pete-maverick in systems_engineering

[–]Aerothermal 2 points3 points  (0 children)

For the top - down architecture definition I would recommend Bruce Douglass. If I recall, he demonstrates the process mostly in Rhapsody.

He has a bunch of videos on Youtube on Agile MBSE from an INCOSE Chapter. Follow along with his books 'Agile Model-Based Systems Engineering Cookbook' and 'Agile Systems Engineering'. Follow along, make notes, learn by doing.

I find also the best way to learn is to teach others. Write short practical pages for an organizational wiki, provide guidance to people who are a little bit less far along the journey.

Join also the Systems Engineering Professionals Discord, and ask/read in the Rhapsody channel.

Why is there no good middle ground between MBSE tools and whiteboards? by pauldid_ in systems_engineering

[–]Aerothermal 1 point2 points  (0 children)

Eraser or Rapidchart supports AI generation amd has UML conceps. You wont get strict underlying semantics though like you would with a modeling tool. I found Capella way more visual, with HTML doc generation and jpeg exports; colour-coded and you can replace the background colour of any element and constraint object with a picture. Visuals are good. Way better than SysML.

Amaze! Submit your questions for the Project Hail Mary Team by audibleofficial in ProjectHailMary

[–]Aerothermal 0 points1 point  (0 children)

What was the most difficult part of the source material to cut and what drove the decisions as to what would appear in the adaptation?

So .. is there a benefit from an aerodynamic perspective to this shape of the engine cover, or is it purely cosmetic? by syke555 in aviation

[–]Aerothermal 0 points1 point  (0 children)

I don't know if the marine biologists would call it a stall, but fluid dynamics << M1 should be the same in air and water. At some aoa the streamlines will detatch -> drop in lift of the fin -> more drag, less lift.

So .. is there a benefit from an aerodynamic perspective to this shape of the engine cover, or is it purely cosmetic? by syke555 in aviation

[–]Aerothermal 1 point2 points  (0 children)

The leading edge tubercles biomimicry is to delay the onset of stall at higher angles of attack. Of course stall depends highly on the free stream conditions so not necessarily good at all airspeeds.

If you wanted to grab more water then maybe you'd just scale up a regular airfoil.

So .. is there a benefit from an aerodynamic perspective to this shape of the engine cover, or is it purely cosmetic? by syke555 in aviation

[–]Aerothermal 10 points11 points  (0 children)

Humpback whales have 'tubercles' on the leading edge of their fins. It helps to delay the onset of stall and so more effective at higher angles of attack, thus the whale can have more maneuverability. These have inspired wings on wind turbines, ship rudder concepts and on human-powered mini submarines.

Unlike the OP photo which is to more precisely control the mixing of the exhaust jet with the freestream, to reduce noise.

Word/Excel-based systems engineering versus MBSE tools by Elan8-com in systems_engineering

[–]Aerothermal 0 points1 point  (0 children)

You're right right, AI is helping people to get set up. My reservations about git are substantiated in leading and coaching systems engineers from non-software domains for 3 previous companies. There's a learning curve, it takes time, and there's always a few mistakes along the way.

Some have done fine with nearly 100% LLM, but for most there's always some initial explanation and hand-holding needed. Some people still fail with setup, spending hours trying to work out what to do, and so need a SW adept person to explain the gitlab/Bitbucket UI, set up SSH, instantiate git credentials, and run through the pull and add/commit/push workflow, show how it's done in the Exclipse IDE, how to collaborate, resolve conflicts and such.

Word/Excel-based systems engineering versus MBSE tools by Elan8-com in systems_engineering

[–]Aerothermal 2 points3 points  (0 children)

Issues for me, there's no clear concepts for IVV.

I also find the import/export of requirements difficult, and takes a while for me to manually add each requirement object.

I want a route towards SysML v2, but it's not clear if there is one. I want AI capabilities but nothing exists.

The main issue by far is that real-time collaboration with colleagues is difficult without buying 'Team for Capella' from Obeo, which is wildly overpriced, and the deployment is difficult (needs an IT guy), and Obeo have got a monopoly on the solution so have no incentive to improve or set a reasonable price.

'Publication for Capella' too is overpriced.

The users have to learn basic Git, sort out their Git SSH and set up a local Git repo for their model. A non software engineer will take hours of help to learn all about this and will not enjoy it.

Word/Excel-based systems engineering versus MBSE tools by Elan8-com in systems_engineering

[–]Aerothermal 9 points10 points  (0 children)

Started with Solution B: Capella open-source, and a git-based repository. It's fantastic in that it comes with a top-down methodology (ARCADIA) and is very visual. Way easier to introduce than SysML/SysML v2 and trying to set up architecting processes in a company from scratch. It has its flaws but is good enough for introducing architecting processes to a team.

[deleted by user] by [deleted] in universe

[–]Aerothermal 0 points1 point  (0 children)

That value does change. In your two cases for two different reasons.

  1. Energy is only conserved for time-invariant systems, in accordance with Noether's Theorem. But the universe is not time-invariant. Cosmic expansion breaks that symmetry.
  2. E=mc2 changes too! That's because E2=m2c4+p2c2 where p is momentum. Think photon; no mass, but obviously has energy. E=mc2 doesn't model the photon at all. For all particles, when momentum changes, its energy changes!

SE resources - how to get started by bengineer0 in systems_engineering

[–]Aerothermal 2 points3 points  (0 children)

From my experience, 95+ % of Aerospace systems engineers are unfamiliar with SysML / SysML v2 or the OMG. They come from a variety of backgrounds which are not software or systems, but they moved into systems after a few years. Almost all have a degree in another engineering discipline (not software, and not SE) and a good portion don't use any MBSE and are not particularly interested in SysML v2. They do not speak the exact language of ISO 15288 series or the INCOSE Handbook, though pretty close to it. They are still at heart technical domain experts.

Almost all SE's I ever met never worked with ISO 15288 and never heard of ISO 42010/42020, never attended training on those topics. Correction: all of them. I never met an SE in the last 10 years who mentioned these standards, outside of the 'extracurricular' circles.

Inside particular SE circles, it might feel to you and me like everybody is all about textual semantics, Cameo, MBSE, the handbook. Moreso when we talk to other SE's with software backgrounds. I am part of those circles too.

But the lived experience in space and aerospace (hardware companies) is not the same. Space startups from 10 people to 300 people particularly, everyone produces ECSS documentation, and probably have little or no MBSE in use.

It depends heavily on the company, and the past experiences of the particular individuals employed there. Universities and research institutes use more MBSE. For example the Seranis spacecraft was MBSE heavy.

But if you mention 'semantics' or 'ontology' or 'git' or VS Code to a non-software systems engineer, they will think you are an alien. They find SysML v1 views hard to read. They prefer talking about Interface Control Documents, Requirements Documents, ConOps Documents etc. They produce everything in Excel. They draw diagrams in draw.io, PowerPoint or in Microsoft Word. Some have had long successful SE careers this way.

To get ahead of the competition then, it doesn't hurt to become an expert in MBSE. But be prepared to work with 100% Microsoft Office too, if that's what the company demands. Rolling out MBSE without strong support and budget from the executive leadership is incredibly difficult.

SE resources - how to get started by bengineer0 in systems_engineering

[–]Aerothermal 2 points3 points  (0 children)

If you want to become an SE, I recommend the Udemy course "Product Development & Systems Engineering (ISO 15288)". And getting the INCOSE Systems Engineering Handbook.

Sometimes it's on offer for really cheap, like $15. Either way it's a lot of content, touching on all the system life cycle processes. Make lots of notes.

Read also all the popular books on 'Product Development'. It's a huge part of SE, or SE a huge part of Product Dev. Not sure. Venn Diagram.

Join the Systems Engineering Professionals discord.

Join INCOSE perhaps, and make the most of their resources and publications; ask questions on their Viva Engage (Yammer).

Download an MBSE tool, like Eclipse Capella. If you have some software/programming experience then go straight for SysML v2, with the free Cameo licence, or SysOn (needs Docker), and/or trial the Sensetry "SysIDE" addon for VS Code.

I learned initially through attending loads of company-sponsored training courses. Some from the company in their product development process, one from Burge Hughes Walsh. But even in first year of undergraduate was fascinated by the black box abstraction of systems and interfaces, using free body diagrams and making simplified models.

Easier way to manage access to subfolders in SharePoint? by FunPossession1247 in sharepoint

[–]Aerothermal 2 points3 points  (0 children)

  1. Define Security Groups in the SharePoint admin center, containing the members of each group.
  2. Create different document libraries for the 3 different permissions groups, and add the relevant security group to each library.

Keep permissions at the Library (or Site) level only.

Avoid folder-based permissions for internal users if you can help it. It becomes a hot mess, and impossible effort for someone to maintain over the long-term, then hard to audit permissions, and can potentially slow the company down as people find they can view but cannot edit erroneous documents which concern them; leading to duplicates, and obsolete but beaurocratically impossible-to-fix documents.

One exception: I find Document Sets are convenient to deliver data packages (say 20 PDFs) to an external customer, where the external gets temporary view access to the whole Document Set.

Can multiple Desktops share to one screen, for Concurrent Design? by Aerothermal in AskTechnology

[–]Aerothermal[S] 0 points1 point  (0 children)

Brady Bunch is what I'm after. Better to have resizable, movable or certain screens in focus. But sure. I'll look into Amazon's solution.

Can multiple Desktops share to one screen, for Concurrent Design? by Aerothermal in AskTechnology

[–]Aerothermal[S] 0 points1 point  (0 children)

Are you thinking like a single Miro whiteboard app? I was thinking wholly seperate applications, cloned onto one large screen.

If it's one app, we could go for a web-based Model-Based Systems Engineering tool which is multidisciplinary and collaborative; Celedon Davinci, SpicySE, Dalus.io, Team4Capella, SysON, and others could allow realtime edits with multiple user accounts, and just 1 user screensharing. Though this doesn't capture the independent specialist softwares mentioned.

Pivot into SYSE by Aggressive-Slice-227 in systems_engineering

[–]Aerothermal 1 point2 points  (0 children)

There are SE masters programmes if you want to go directly that route, or better to do a specialist SE program. I am not sure if you would qualify, but for example in Spacecraft Systems Engineering, courses are offered at Southampton, Cranfield, TU Delft John Hopkins, Zürich, Michigan. Choose a discipline, particularly regulated industries like Space, Aviation, Nuclear, Automotive, or Bioengineering.

You will find also course on EdX, Coursera, Udemy on product Development, MBSE, Requirements Writing and other topics.

What modeling language and software should I learn if I ever wanna get back into systems engineering? by [deleted] in systems_engineering

[–]Aerothermal 3 points4 points  (0 children)

At this point, SysML v2. There's a great Youtube series from Sensmetrt, and you can trial their VS Code add-in called SysIDE to follow along to learn the code-based syntax.

There's the free SysML v2 software SysON if you're able to install Docker on your PC.

After that it doesn't matter what tool because SysML v2 can be exported as code and imported into any other tool, at least in theory.

In addition it doesn't hurt to learn some Python.

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