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Ancient cat video

Biker Falls Into Cactus Bush

Humans Pulling a Truck Out of a Steep Gorge

The Missing Link in Renewables | Real Engineering

Buttle says...

Good presentation of the big problem with wind and solar for electricity -- they're not predictable over time. For anything close to 100% renewables this has to be addressed. They're right in saying Li-ion is not going to cut it for a number of reasons. Will the solution proposed actually do the job? No idea here.

Rocket Sled Impact Test In Slow-Motion

Extreme Social Distancing At The Office

Extreme Social Distancing At The Office

The Most Popular Programming Languages - 1965/2020

Buttle says...

Assembler (for TI DSPs, embedded, no OS)
Scheme (a lisp)
C
Awk
would like to learn a logic programming language (eg Prolog), but have yet to get over starting inertia
will do some Fortran shortly for access to numerical libraries

ant said:

What are you guys using today if still programming?

Toots & the Maytals sing Take Me Home, Country Roads

Pigeon Eating Catfish

Is Success Luck or Hard Work? | Veritasium

Buttle says...

Luck, shmuck. I have an issue with the snatoms; how do you make a double or triple bond? It was simple with the old fashioned ball and spring things.

newtboy (Member Profile)

Al Franken Draws USA Freehand

Buttle says...

Once you throw in Puerto Rico, you have to do Guam, and the US Virgin Islands, and American Samoa. I probably missed one; is Kwajalein a territory or just a 99 year lease?

BSR said:

Pencil me in for "Impressed" also.

That should be a requirement for any presidential candidate. He could have thrown in Puerto Rico for extra credit.

Insanely Big Explosion in Beirut, Lebanon (compilation)

Buttle says...

Ammonimum nitrate does require a sensitizer in order to be explosive, however this stuff was intended for blasting, so it presumably already had something mixed in with it. The other requirement is a low explosive detonator, eg blasting caps. In this case it was probably a random accident, so not as efficient as a deliberate blasting setup.

wtfcaniuse said:

The colour of the plume apparently indicates a lot of unexploded nitrates. Ammonium Nitrate needs to be mixed with other things for an efficient reaction. Once the explosion started the reaction couldn't continue efficiently and the excess was expelled into the plume.

Insanely Big Explosion in Beirut, Lebanon (compilation)

Buttle says...

The large, windowless square structure is grain storage. It blocked some of the blast but represents a large fraction of Lebanon's grain supply.

More details from https://www.moonofalabama.org/2020/08/beirut-blast-wrap-up.html#more

-------------------------%<--------------------------------%<------------------------------ RFERL spoke with the captain of the ship that had unintentionally brought the ammonium nitrate to Lebanon. He confirms the ship's arrest. It also reports the cause of the incident:

Lebanon's LBCI-TV reported on August 5 that, according to preliminary information, the fire that set off the explosion was started accidentally by welders who were closing off a gap that allowed unauthorized entry into the warehouse.

LBCI said sparks from a welder's torch are thought to have ignited fireworks stored in a warehouse, which in turn detonated the nearby cargo of ammonium nitrate that had been unloaded from the MV Rhosus years earlier.

Independent experts say orange clouds that followed the massive blast on August 4 were likely from toxic nitrogen dioxide gas that is released after an explosion involving nitrates.

There is a short video of firefighters at the initial fire. Reportedly none survived when the fireworks fire set off the ammonium nitrate. Another video shows the initial fire caused by welding. It burns a while and then sets off fireworks in a first explosion. This takes the roof off the warehouse. A few minutes later the fireworks cause the huge explosion of the ammonium nitrate.

Reuters provides another detail:

The source said a fire had started at port warehouse 9 on Tuesday and spread to warehouse 12, where the ammonium nitrate was stored.

That the ammonium nitrate was stored for seven years was not the responsibility of the port management but was caused by some judicial quarrel:

The head of Beirut port and the head of customs both said on Wednesday that several letters were sent to the judiciary asking for the dangerous material be removed, but no action was taken.

Port General Manager Hassan Koraytem told OTV the material had been put in a warehouse on a court order, adding that they knew then the material was dangerous but “not to this degree”.

“We requested that it be re-exported but that did not happen. We leave it to the experts and those concerned to determine why,” Badri Daher, director general of Lebanese Customs, told broadcaster LBCI.

Two documents seen by Reuters showed Lebanese Customs had asked the judiciary in 2016 and 2017 to request that the “concerned maritime agency” re-export or approve the sale of the ammonium nitrate, which had been removed from cargo vessel Rhosus and deposited in warehouse 12, to ensure port safety.



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Beggar's Canyon