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Evolving Floorplans

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Re: Evolving Floorplans

#62
post #56

Earlier quoted context omitted.

Concrete is manual 3D printing from 100+ years ago. =) I've seen a concrete 3d printer, but it doesn't look like it would be structural. i.e. not sure how you would print around full lengths of rebar?

You have to build formwork to construct with in-situ concrete, so there's still carpentry (or equivalent) involved. It's a good point that existing architectural concrete 3d printing creates "mass concrete" not reinforced concrete, but mass concrete can be structural.

What sort of structure would you use a concrete without a tensile support like rebar or steel of some kind? How would that stand up in an earthquake?

Re: Evolving Floorplans

#65
His genetic examples look like European cities compared to the actual floor layouts, which are more like New World ones designed on a grid layout by central planners.

Perhaps there's wisdom in allowing cities to grow organically/chaotically after all.

Re: Evolving Floorplans

#66
This is great. I did a major project in eighth grade about designing a school to make traffic flow more logical and the strict times they specified for student travel achievable. We were expected to leave a class, travel to our lockers, accomplish any necessary bathroom tasks and to travel to the next class in four minutes and 20 seconds. Failing to do so was a disciplinary matter, but it did not appear that the school or our schedules were designed with this sort of urgency in mind.

The main focus of my solution was to make the school a torus. Like many of my youth projects (writing a text adventure game...), I did not have the knowledge to solve the problems scientifically.

Re: Evolving Floorplans

#67
post #5

Sure, it looks cool. But there are so many other properties of a home that aren't accounted for in this model (mostly aesthetic ones, like cozyness, feelings of safety/comfort, how the plan interacts with light, etc). One day we'll live in homes with automated floorplans, I'm sure of it. But it won't happen (or at least, we won't be happy about living in such things) until the day we figure out ways to deal with more…

I was at a vehicle AI conference early this month discussing how AI will only output based on the quality of its inputs. And the fear coming out of that conference was if space wasn't correctly dedicated or allocated, the AI will optimize the systems as much as it can to squeeze out every single ounce of efficiency. Qualitative items such as the ones listed are important for customer focused environments, however, I'…

> Qualitative items such as the ones listed are important for customer focused environments, however, I'm not sure if AI can account for such factors.

One of the nice things you can do with optimization problems is plug humans into the loop as oracles. Often, 'we know it when we see it', and we can do pairwise comparisons of 2 possibilities. So you can train a ML model based on win/loss comparisons and it'll learn to take into account the softer qualitative aspects via preference learning.

A recent example you might remember from the press: "Deep reinforcement learning from human preferences" https://arxiv.org/abs/1706.03741 , Christiano et al 2017 https://deepmind.com/blog/learning-through-human-feedback/ https://blog.openai.com/deep-reinforcement-learning-from-hum...

But also "Deep TAMER: Interactive Agent Shaping in High-Dimensional State Spaces" https://arxiv.org/abs/1709.10163 , Warnell et al 2017.

You can even pair it with EEG or brain scans for implicit ranking: "Towards personalized human AI interaction - adapting the behavior of AI agents using neural signatures of subjective interest" https://arxiv.org/abs/1709.04574 , Shih et al 2017.

Re: Evolving Floorplans

#68
post #56

Earlier quoted context omitted.

You have to build formwork to construct with in-situ concrete, so there's still carpentry (or equivalent) involved. It's a good point that existing architectural concrete 3d printing creates "mass concrete" not reinforced concrete, but mass concrete can be structural.

What sort of structure would you use a concrete without a tensile support like rebar or steel of some kind? How would that stand up in an earthquake?

"Primitive" structures and other structures engineered to avoid tension in the concrete. Concrete doesn't have zero tensile strength. Apparently it's a few MPa, so a fifth or a tenth of the compressive strength. http://www.engineeringtoolbox.com/amp/concrete-properties-d_...

The large dome of the (Roman) Pantheon is unreinforced concrete. Most compressive structures built before the modern period (arches, domes, buttresses) were not reinforced with tension elements, just plain masonry.

Re: Evolving Floorplans

#69
post #56

Earlier quoted context omitted.

You have to build formwork to construct with in-situ concrete, so there's still carpentry (or equivalent) involved. It's a good point that existing architectural concrete 3d printing creates "mass concrete" not reinforced concrete, but mass concrete can be structural.

What sort of structure would you use a concrete without a tensile support like rebar or steel of some kind? How would that stand up in an earthquake?

Rebar makes earthquakes worse, as seen in California's freeway collapse. The rebar depends on the concrete to prevent corrosion, but that is only good for roughly 50 years. Rust causes expansion, which cases cracking. The outer concrete falls away, leaving rebar to get crushed under the load. The obvious fixes, like stainless steel rebar, have thermal expansion coefficients that don't match concrete, so instead you get cracking even without corrosion.

Lots of Roman stuff is still standing in areas that get earthquakes. The solution is to use a conservative design, with arches and thick walls. Domes are good. We can improve on this with 3D printing, using a structure like mammalian bone: solid near the surface, and spongy in the middle.

Re: Evolving Floorplans

#70
post #32

Earlier quoted context omitted.

How many elementary school children have perished in school fires in the last 25 years?

Thankfully, zero: https://www.nfpa.org/News-and-Research/Fire-statistics-and-r... But your point is well taken; there's no particularly great reason to, unless your school is so big and your administration is so goofy that kids are constantly running late. That constraint would be better suited to applying these algorithms to offices, hospitals, military bases, prisons, and maybe shopping malls.

The high school I went to (Alvin H.S. in Alvin, TX) was laid out terribly. It was almost 70 acres, and there were dozens of buildings with classes in them.

We were given 7 minutes between classes, and my freshman year I had to cross the campus multiple times per day (more than 2000 feet each way). That meant pretty much running.

On days when it was raining, and you couldn't cut through the grass, or if you were handicapped and had to stick to the 5 foot wide covered paths, you were guaranteed to be tardy and written up or sent to your office (potentially back across campus).

In the nearly 15 years since I left that school, they have consolidated most of their buildings, and only have about 10.

They could definitely have used some sort of planning algorithm to come up with the optimum scheduling for their students.

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