ggcdn

19 ms·

151.
by ggcdn 9y ago
> just as long as they eliminate outcomes like this I guess the point I'm trying to make is that complete elimination isn't possible in a long tail statistical distribution. There will always be a point where we have to draw th
152.
by ggcdn 9y ago
1) I'm not saying there aren't novel solutions - there's a whole category of devices that use active control. I'm saying its not common place. 2) From what I understand, China has a completely different design philosophy
153.
by ggcdn 9y ago
They don't base isolate tall buildings, they isolate short ones. The whole point of base isolation is period elongation. In a tall building, you're already flexible, and your column loads are tremendous. It makes no sense.
154.
by ggcdn 9y ago
Straight from the article: > The damper system has no connection with the seismic safety of One Rincon. It is always a challenge to build a tall structure in earthquake country, and One Rincon's engineering response was to use outri
155.
by ggcdn 9y ago
> If your theory is that the building code is just fine when things like the Millennium Tower can happen, then we disagree on what "fine" means. What portion of the building code do you think needs to be updated in response to
156.
by ggcdn 9y ago
Most cities keep a set of permit drawings, but generally you need to have a proximate relationship to the building to get access to them
157.
by ggcdn 9y ago
> A standard approach for tall buildings is to incorporate either a dynamic weight high in the tower to counterbalance the sway so it doesn't go critical, or incorporate dynamic elements in the foundation system. As a structural eng
158.
by ggcdn 9y ago
It would be interesting to visualize and put some numbers to the "cloth cycle". Here in Vancouver, thrift stores are everywhere and quite busy, and it seems like the majority of our used clothes end up in donation bins for them. S
159.
by ggcdn 9y ago
Note that the title was edited (by a mod?) from my stylised version (oops - I had used the tweet title) to "Engineering Habitats for the Moon and Mars" which is actually a subheading within the article. The actual title is "S
160.
by ggcdn 9y ago
Surprisingly, yes! Even in Canada, about 9/10 of the projects I work on are using these units. These units are generally much more pleasant to remember and work with, even despite the code using empirical design equations that require
161.
Engineering Habitats for the Moon and Mars(structuremag.org)
96 points by ggcdn 9y ago|49 comments
162.
by ggcdn 9y ago
My wife and I have enjoyed having a Google Home in the kitchen. It's worked for us flawlessly playing music from Spotify, timers, random fact queries, even recipes with step-by-step instructions. I imagine that the functionality will o
163.
by ggcdn 9y ago
And if you want to get even more techy, get a google home and say "hey google, add soap to my shopping list"
164.
by ggcdn 9y ago
You get a worse bond if it's too cold. as the plastic cools it warps and can crack along the interface between layers. Plastics like abs usually require a heated print bed as well. I think the ideal solution would allow the entire piec
165.
by ggcdn 9y ago
structural engineers are required to keep all communications, notes, etc for seven to ten years, depending on the jurisdiction. These super short email retention policies seem extremely unethical to me.
166.
by ggcdn 9y ago
IIRC, in structural concretes flyash is used as an admixture to reduce portland cement usage, and enhance some properties like permeability, but not as a replacement for sand.
167.
by ggcdn 9y ago
> try to correlate it with slide events Interesting idea, have you though about how you plan on making the correlation? Two thoughts I just wanted to throw out there: -As slopes fail, I think they tend to stabilize themselves, so it migh
168.
by ggcdn 9y ago
My guess would be the abundance of nice sheltered inlets for net pens. My sister is a marine biologist for a fish farming company (not the one involved in the article). My understanding from past discussions with her is that there have been
169.
by ggcdn 9y ago
There is a reason for this: Biomagnification https://en.wikipedia.org/wiki/Biomagnification
170.
by ggcdn 9y ago
Profession: Consulting Structural Engineer [7:00] wake up, shower, dress [7:20] drive to office [7:50] coffee, light breakfast, browse hn [8:00] fret about the 15 pressing issues I need to deal with [8:05] work on something else [9:00] site
171.
by ggcdn 9y ago
Microfractures =/= global strength loss. Additionally, the concrete itself tends to strengthen over time. I guess I just don't understand what failure mode you are worried about. There are thousands of slender concrete structures
172.
by ggcdn 9y ago
Do people salt their balconies? I've never seen nor heard of this.
173.
by ggcdn 9y ago
I fail to see what's dumb about using concrete for skyscrapers. Tall buildings have been built this way for over 50 years without issue.
174.
by ggcdn 10y ago
Could the website server make the requests to the ad networks, then serve the responses as if it were native content? Current browser-based blocking tech would be rendered useless, right?
175.
by ggcdn 10y ago
>What problem does this solve? It prevents them from being bought by speculative investors and taken off the market. An alternative solution to the same problem is an empty-home tax, which is being rolled out in Vancouver. > What is t
176.
by ggcdn 10y ago
I don't follow your logic here. Smaller condos obviously cost less in absolute dollars, but they aren't viable options for families. So we are still left at a housing inventory that is great for speculative investors and individua
177.
by ggcdn 10y ago
Some zoning rules could be beneficial. For instance, if cities started mandating 15% of new apartments had to be rentals, or 40% have to be 3 bedrooms, etc. Right now, much of the new housing stock coming online isn't really useful for
178.
by ggcdn 10y ago
I can't speak about other places, but the design and construction industry in Vancouver is working flat-out and has been since the slowdown in 2008-2010. My employer (engineering consultant) has a backlog of several months of design wo
179.
by ggcdn 10y ago
Some things you might consider for becoming more self sufficient: -Membership dues -Vending machine with useful supplies -Locker / storage space rental -Government grants for larger purchases A community workshop I used to go to had gr
180.
by ggcdn 10y ago
If you're worried about chlorine, you don't even need a filter. Put the water in a jug in the fridge for an hour or so.

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