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delibes

439 karma · joined December 23, 2014

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delibes··on The mystery of why one ant species goes after larger foes (2018)
Huh? I seem to recall watching the series "Planet Earth 2" and there was some tense scenes with iguanas and snakes:

https://www.vulture.com/2017/02/planet-earth-ii-iguana-snake...

Looks like they have a predator to me.

You might have a point about war and in general consumption being a 'wired-in' behaviour. Then again assuming we have something like intelligence and free will, we should be able to choose to override some primitive behaviour.

delibes··on Fully documented source code for Elite on the BBC Micro
6400 [edit: kills] - http://wiki.alioth.net/index.php/Elite_Rating

This isn't new knowledge. I remember reading about that goal and the number 6400 in a magazine, probably BBC Micro User.

Right on Commander!

delibes··on IBAHRI condemned UK treatment of Julian Assange in US extradition trial
I'm guessing cow towel = kowtow. But... Perhaps you do treat your cows nice n stuff?
delibes··on The periodic table, colour coded by the likely origin of each element
Even though I've seen that before, it never properly registered with me that Boron and Beryllium are made by a separate process: https://en.wikipedia.org/wiki/Cosmic_ray_spallation
delibes··on Mainvest – Invest in brick and mortar businesses
https://en.wikipedia.org/wiki/Main_Street
delibes··on A Map of the Trees of London
There's also this which might be based on the same data:

https://www.london.gov.uk/what-we-do/environment/parks-green...

delibes··on 75-year-old woman with shovel accidentally took down Armenia's internet (2011)
Perhaps co-incidentally, today (24th April) is the day of remembrance for the Armenian Genocide
delibes··on Google, Xiaomi, and Huawei affected by zero-day flaw that unlocks root access
> However, if you install an application from an untrusted source, attackers can take advantage of that. Attackers can also take advantage of the bug if they pair it with vulnerabilities in the Chrome browser to render content.

So, you have to sideload an app or from some other source. Is it unreasonable to say don't do that? How common is it anyway? I work with IT folks and only a few ever seem to load outside the Play store. Perhaps in other parts of the world it's more common...?

delibes··on What Swimming Taught Me About Happiness
How about a pool in a rotating orbital space station? Just keep swimming forwards and slightly uphill :) Just don't lose the fake G or you could be the first person to drown in space.
delibes··on SpaceX says Crew Dragon capsule exploded due to exotic titanium fire
I think levels of impurities and surface treatment of the metal may cause variation in whether something is considered suitable or not?

For example, from [0] (which is declassified from 1974!) :

"Titanium can react violently with strong oxidizers if the oxi-dizer penetrates the oxidized surface layer."

"Free chloride, ions in nitrogen tetroxide can cause an accelera-tion of intergranular corrosion in titanium."

delibes··on Apple Recalls 15-Inch MacBook Pro Laptop Computers Due to Fire Hazard
Yep. I wonder similar about the 13" MBP 2015 that I have, which has a swollen case. Not covered in last year's 13" recall, but looks like the same problem. The London Apple store disagree :(
delibes··on Hey advertisers, track this
LOL, ran it in private window. We have a single outward facing office IP address, and a few tabs were for things like bras and lingerie, so I'm now waiting to see if it affected others on the office network!
delibes··on Apple Reveals ‘Lisa’, Its $50M Gamble (1983)
Not sure I agree. Just my anecdotal data of course, but I don't remember seeing an Apple II in UK schools in the 80s, but definitely BBC Micro/Master and a few Archimedes later. This was in 2-3 North West state schools, so there might have been regional differences.

Edit - oh yes, and about the ZX Spectrum... I can't imagine anyone willingly changing from something else to that rubber keyboard! Yuck.

delibes··on ‘I believed I didn't have the right kind of brain for science’
Congratulations! Your comment reminded me that 50% of my current team do not have a STEM degree.

I decided to create a short survey to try to collect some data: https://delibes.typeform.com/to/Uix5hM

It's probably not very scientific! Still, if anyone fills it in then I'll share the results.

delibes··on Google revives controversial cold-fusion experiments
It's not a chemical catalyst, but the idea of muon-catalysed cold fusion has been around since the late 50s. I think I first read about it as a child in the appendix of Arthur C Clarke's "2061" novel.

https://en.m.wikipedia.org/wiki/Muon-catalyzed_fusion

Is that an open mind or parallel thinking? It's an interesting idea anyway, but seems no way to efficiently create enough muons / u- mesons.

delibes··on A Rocket Built by Students Reaches Space
Bigger also means they can put more sensors onboard (though you can do quite a bit with Estes). But even the Shuttle SRBs used parachute recovery, although without popping the nose cone.

Biggest difference I can think of is that the SRBs had a gimballing nozzle. From photos on the project website, it looks like fins are fixed too. I don't know the law around it, but guess adding control surfaces would make this into a guided missile!

https://www.uscrpl.com/traveler-iv http://www.uscrpl.com/updates/2019/5/22/traveler-iv

delibes··on F-1 Thrust Chamber
I think somewhere in this sci.space archive of rocketry usenet wonders is a quote along the lines of "Rocket science is just extreme plumbing". Cryogenics with powerful oxidizers is hard!

https://yarchive.net/space/index.html

delibes··on Apple’s $9 engineering marvel no one wants (2017)
Hug of death - archive link: http://archive.is/rQqtB
delibes··on What Made Apollo a Success? (1971) [pdf]
Gus Grissom, Ed White and Roger Chaffee :(

I do get your point, and it's amazing it worked as well as it did. Space is tough, and things are likely to go wrong, just as they still do with civil aviation.

delibes··on Air-breathing rocket engine set for key tests
The space plane ideas for using a Sabre engine are fairly early stage designs, since the whole engine isn't even a working prototype yet.

Of the various designs I've seen via wikipeda, Reaction Engines PR, and on-line forums, it seems that the thermal management proposals are :-

* Bigger lighter air frame will do more thermal soak than other spaceplanes (I mean, what else is there apart from Shuttle and X15?)

* Retain some fuel to be circulated through airframe during decent, and then used for powered landing

* Less intense re-entry profile to avoid sharp heat spike, but at expense of longer thermal load

* Avoid going all the way to orbit, using a small final booster for orbital insertion

If they can harvest enough LOx/air in the final ascent, then they could also do a retro burn I suppose.

Perhaps a mix of all these, plus heat shields. SpaceX are learning how to deal with similar issues right now too.

delibes··on Arrow of time and its reversal on IBM quantum computer (2018)
I don't know enough quantum physics. Is this a qubit equivalent of reversing the mixture of dyes in viscous liquids?

https://sciencedemonstrations.fas.harvard.edu/presentations/...

delibes··on For South Asian Cooks, Yogurt Starter Is an Heirloom
More anecdotal cross-cultural fun stuff... I have some Lebanese friends and noticed that their children seem to start eating labneh (somewhere between thick yoghurt and soft cheese) very early.

Also the Armenian word for cheese is 'paneer'.

People across the world can share a lot in common if they want :)

delibes··on For South Asian Cooks, Yogurt Starter Is an Heirloom
Part-Armenian. My relatives told a story that when their grand-parents went to the USA, they soaked some cotton fabric such as handkerchiefs in yoghurt, let it dry, and then just packed it in with other clothes. On arrival they then rehydrated to have their culture.
delibes··on Michael Crichton, Science Studies, and the Technothriller (2015)
I haven't read it, but enjoyed The Andromeda Strain and Jurassic Park. Perhaps I have no taste. What's so bad about his writing?
delibes··on AMD’s aggressive pricing update on the EPYC 7371
By Grabthar's hammer, what a savings!
delibes··on Thieves boosting signal from key fobs inside homes to steal vehicles
Looks like we have a new modern interpretation for 'boosting'

https://www.urbandictionary.com/define.php?term=Boosting%20C...

delibes··on Intro to Rod Logic (2009)
What I find odd about this is having to push the output rod and check where it ends up.

I'm not sure how this would work in a clocked/latched system, or whether that's even possible? Does it need a reset at the end of a cycle, or can it only live in a async clockless circuit?

[edit] OK I searched and found that the Zuse Z1 used this system too! And had a clocking system. This page describes the same problem and has details of alternative designs :

https://anthony-zhang.me/blog/rod-logic/

delibes··on Ozone: The Earth's protective shield is repairing
But the BBC reported earlier this year that somebody is cheating and making CFC-11 - banned by the Montreal Protocol.

https://www.bbc.co.uk/news/science-environment-44138984

delibes··on The Last Messiah (1933)
An interesting proposed solution. It seems unlikely to work for all.

Somehow reminds me of this: https://principiadiscordia.com/book/45.php

delibes··on Michael Young, the Red Baron
If you're not British, you might not get that 'red' here is associated with the Labour party who are left wing. Blue is the colour associated with our Conservative party (right).

Right now, with Brexit and leadership fights and other stuff, the main parties are all over the place though.

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