Deme

joined 2 years ago
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[–] Deme@lemmy.world 2 points 1 month ago

Great to see it. Those look very nice!

[–] Deme@lemmy.world 2 points 1 month ago

Grass would be more of a hassle. Once the plants have properly rooted down, the tracks shouldn't need any watering or routine cutting. I'm guessing that the trams themselves prevent most of the plants from growing too long. As can be seen in the first picture there, the plants between the rails are shorter than those between and outside the two tracks.

 

Crossposted from: https://lemmy.world/post/29870566

Grassy trams are better than dead asphalt, but monoculture lawns are still not the best. I'm not sure what the best translation of the official name would be, but I guess meadowy tram would fit. Much lower maintenance and increased resilience to heat and dryness are nice bonuses.

This is a 1km stretch of tramline 13 running through a park in Helsinki, Finland.

 

Grassy trams are better than dead asphalt, but monoculture lawns are still not the best. I'm not sure what the best translation of the official name would be, but I guess meadowy tram would fit. Much lower maintenance and increased resilience to heat and dryness are nice bonuses.

This is a 1km stretch of tramline 13 running through a park in Helsinki, Finland.

[–] Deme@lemmy.world 2 points 3 months ago* (last edited 3 months ago)

An extreme value is always only extreme in relation to some baseline. For temperatures it's usually a value that departs far from the local average. With WBT it can also mean values that approach the limit of what the human physiology can handle, a value that is quite universal due to us all being of the same species. The body cannot adapt beyond the limits set by thermodynamics.

Tropical and extreme aren't mutually exclusive. +30°C in Antarctica would be both tropical and extreme. Both are used where applicable. A temperature can also be extreme without being tropical. No matter what Trump thinks, he doesn't have the power to redefine (let alone erase) words.

The wet bulb temp. in a proper sauna should get quite high, I don't have exact numbers but above 70°C or so (dry temp. 90°C, relative humidity 50% would translate to a WBT of 74°C). In most contexts that would be extreme, but not here.

[–] Deme@lemmy.world 3 points 3 months ago* (last edited 3 months ago) (2 children)

*Extreme WBT's

A wet bulb thermometer measures wet bulb temperature (WBT), which is a metric that always exists and can always be measured. It only gets bad when the WBT reaches an extreme value, as is the case for basically all environmental metrics. Saying that wet bulb temperature is lethal is like saying that temperature is lethal. Look out for temperature! I'm sorry for the rant so I'll try to keep this short, but "wet bulb" by itself in this context is an inane shorthand that lacks all the significant words and muddles the meaning of those words that are in it. Scientists talk about Extreme WBT events, because that's what they are. A less of a mouthful would be nice for science communication, but I don't want it to come at the expense of words losing meaning like that.

Heatwave is a nice and descriptive word for one type of an extreme temperature event. Cold snap is another one. I'm glad neither is called "temperature event" because that would be dumb.

[–] Deme@lemmy.world 7 points 5 months ago (1 children)

Nice! Altocumulus stratiformis undulatus, but with two intersecting systems of undulations. Think of them like cross waves at sea.

 
[–] Deme@lemmy.world 1 points 6 months ago

Oh, right. I figured that a person using a screen reader can probably see that one by themselves, but I suppose I could throw that one into the post body as well.

[–] Deme@lemmy.world 1 points 6 months ago (2 children)

Thanks for the reminder!

1
submitted 6 months ago* (last edited 6 months ago) by Deme@lemmy.world to c/aviation@lemmy.world
 

Alt text for the comic embedded in the link: An XKCD comic about how to decode a METAR:

METAR - "Meter" (Usually misspelled)

KNYC - Station ID

251600Z - Time (25:16:002)

18035G45KT - Wind speed has been 18,035 knots for a good 45 minutes now.

6SM - Observer is a size 6 small.

VCFCFZVA - Sorry, the station cat walked on the keyboard.

+BLUP - Weird noise the sky made earlier.

NOSIG - The observer has no significant other :(

LTG OHD - We overheard someone saying there was lightning.

A3808 - Hey look, an Airbus A380-800!

RMK - Remarkable!

A02 - Fanfic archive equipped with a precipitation sensor.

SLP130= - Observer got sleepy around 1:30.

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submitted 6 months ago* (last edited 6 months ago) by Deme@lemmy.world to c/aviation@lemmy.ml
 

Transcript for the comic embedded in the link: An XKCD comic about how to decode a METAR:

METAR - "Meter" (Usually misspelled)

KNYC - Station ID

251600Z - Time (25:16:002)

18035G45KT - Wind speed has been 18,035 knots for a good 45 minutes now.

6SM - Observer is a size 6 small.

VCFCFZVA - Sorry, the station cat walked on the keyboard.

+BLUP - Weird noise the sky made earlier.

NOSIG - The observer has no significant other :(

LTG OHD - We overheard someone saying there was lightning.

A3808 - Hey look, an Airbus A380-800!

RMK - Remarkable!

A02 - Fanfic archive equipped with a precipitation sensor.

SLP130= - Observer got sleepy around 1:30.

Image alt-text on the website: "In the aviation world, they don't use AM/PM times. Instead, all times are assumed to be AM unless they're labeled NOTAM."

[–] Deme@lemmy.world 1 points 10 months ago

Thanks! Time really is the most important ingredient. Look at enough sunsets and sunrises with an adequate camera on hand, and every now and then a great scene will come up. After that it's just point and shoot.

 
 
 
[–] Deme@lemmy.world 2 points 1 year ago

Thanks! Yes, it is a photo. The moth was chilling on a window after sunset. The blue dots are out of focus apron lights.

 
[–] Deme@lemmy.world 9 points 1 year ago* (last edited 1 year ago)

They sure don't tend to do that, but there are still mundane explanations for this. An unintentional collision between the satellite and another object being one of them.

"I find it hard to believe they would use such a big satellite as an ASAT target," McDowell said.

[–] Deme@lemmy.world 12 points 1 year ago* (last edited 1 year ago) (1 children)

Not because of Kessler syndrome, just your run of the mill space debris reentering the atmosphere and increasing the amounts of certain metals up there that contribute to ozone depletion. In other words, that may well happen even if we're lucky and avoid Kessler syndrome.

 

This one turned out a bit more blurry, but the aurora itself is too good not to post here.

 

These guys danced accross the sky, reaching quite far into the southern sky as well. Picture taken on 4.4.. I'm just mad that while I had hauled my tripod with me, I had left the camera mount back home :))). I stuck a bench into the snow and steadied my hand against that. A couple of these turned out surprisingly well.

 
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