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  • TalkRational: I guess I subconsciously just wanted to comment on some shit.

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Topics - Martin.au

1
Please be good, please be good, please be good!!!

Has an very lol, "epic" poster.


Just watching the first one again. :D

Chris Pratt thinks it will be good. :D
On May 5th the greatest movie in the history of movies is coming. There has never been and will never again be a movie like this. Seriously. Ever heard of Citizen Kane? We're much better. Seriously. Our movie just tested at over one million points. Rotten tomatoes already has it at 234% fresh. #GotGVol2 will win every movie award AND about 39 Olympic gold medals in swimming, gymnastics, the skiiing event with the gun, x games, snowmobiling and everything. It will win the World Cup and about 7 super bowl rings, sorry TOM Brady. This movie will fry your brains and lift your spirits. James Gunn will be elected president of the world. They will add the faces of the guardians to Mount Rushmore for sure. We're gonna get a planet. May 5th will become a national holiday. Everyone will get pregnant. Candy will fall from the sky. Global warming will stop. Dinosaurs will come back to life. Which unlike some movies might tell you, is actually a really good thing. Because they won't flip out and kill people instead they'll be your awesome pets. So basically get your tickets as soon as you can. Don't be the only person on the planet who doesn't see this movie.
Humbly,
Starlord
2
According to Ken Ham:
"If Pope said 'Big Bang is real'-then Pope's wrong. Bible states earth came before sun-not other way round"

Dave, your thoughts? Did the Earth come before the Sun?
3
Science / Daily rainfall sampler
So, one of the things I'm dabbling with (ostensibly for my PhD project) is a rainfall sampler for investigating the isotopic composition of rainfall. The plan is to have an automatic rainfall sampler, able to sample daily for 60 days at a time near several of my sites.

The goals are:
• Cheap
• Must be build-able out of common materials, that are easy to acquire.
• Must use techniques that are commonly available.

After a few ponderings, I've come up with this.
• Outer casing - Half a HDPE plastic drum (like a 44gal drum). Common and easily available. Mine cost $11. This gives me a usable inside diameter of around 56cm. On top of the outer casing will be two funnels - one for each bottle ring (see below).
• Inside the casing a plywood and acrylic turntable, containing two rings of 125ml HDPE bottles. (I'd love 250ml, but with 56cm available diameter, I'm limited to around 44mm max diameter bottles to fit 60. Therefore, I'm stuck with 125ml bottles, at least until I find some skinny 250ml bottles.
• The turntable rotates once each day by 12º to access a new bottle. Rotation is driven by an outer ring gear, and a 1:5 reduction gear to a cheap arduino controlled 5v stepper motor. I'll probably use a hall sensor to zero the stepper once each rotation.
• Each full turntable rotation accesses 30 bottles, allowing 30 days of sampling per ring.
• To fill the second ring, and divert water from the unused ring, is a y-shaped tube, which catches water from whichever funnel is inactive and diverts it out through the centre of the sampler. This water can then be collected in an integrator bottle.

Equipment and materials
2 x 600x400x6 acrylic sheets, cut on a laser cutter.
1 x 700x400x6 acetal (for gears. 4 sets of gears per sheet, so you'd want to build a few samplers)
1 x 1200x600x12 marine ply (for turntable and base)
1 x 100x50x1200 or similar for legs. Ideally we want legs that can be weighted down or spiked to the ground
2 x 608 bearings (roller skate bearings) for gears.
Some 50x20 mm wood for internal framing.
3d printing for funnels and Y-junction.
205L plastic drum (or similar) for outer casing.
50mm PVC for funnel holders (300mm above outer casing to stop splashes).
15mm PVC for Y-tube and funnel to bottle tubes.
Couple of softdrink bottles for funnels (70mmØ)
Some screws, 8mm bolt.
Arduino, stepper motor, magnet, hall sensor, battery pack.
Solar panel

To prevent evaporation I'll be stuck using paraffin oil. I'd love another option, but I haven't found any that will work in that amount of space. I'll probably use the dipped tube method (Groning 2012) if I decide to catch an integrated sample from the Y-tube.

Laser cutting is the one thing that people may have trouble accessing. I use Fab Lab, which is a community run fabrication laboratory, giving people access to 3d printing and laser cutting.

Anyone have any thoughts. Suggestions?
4
Science / Anyone here familiar with Modflow?
If so, are there any common hacks to get an unconfined layer to avoid using height to water table to determine transmissivity for the cells that lie under a reservoir (using the RES1 package)?
5
Politics and Current Events / I can't help it
Every time I see this:



I see this:

6
I'm not going to read the huge thread to find out.

What stage are you up to now? Did you end up tyveking the walls?
7
Introductions / Hi people.
Hail citizens!!

I think most of you know me, but here's the summary.

• Used to be a surveyor, specialising in mining, engineering and laser scanning work.
• Got bored and did my undergraduate in Geology and Geophysics and Applied Geology.
• Then did Honours. Thesis was "Quantifying lake hydrological and isotopic responses to climate change: A coupled hydrologic-isotopic mass balance model applied to two Australian maar lakes"
• Now working on my PhD, continuing on from my honours project.

And I take photos sometimes.