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  • Talk Rational: Aint been evicted just yet, but thanks for your kind offer to move into that lovely bar fight youve got going over there.

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Messages - Alan Fox

1
Technical Issues and Questions / Re: LaTeX
Elkarte doesn't have a LaTex add-on.

Have you tried something like this?  You supply the LaTex and the applet converts it to bbcode.

There are also apps that convert LaTex to an image.  Like this one.
Blimey, that was quick! Thanks for the info!!!
2
Technical Issues and Questions / LaTeX
Is it possible to use LaTeX in comments? Does Elkarte support it?
3
Science / Re: NH winter cooling


From NOAA
4
Science / Re: NH winter cooling
Quote
Earth's global surface temperatures in 2017 ranked as the second warmest since 1880, according to an analysis by NASA.

Continuing the planet's long-term warming trend, globally averaged temperatures in 2017 were 1.62 degrees Fahrenheit (0.90 degrees Celsius) warmer than the 1951 to 1980 mean, according to scientists at NASA's Goddard Institute for Space Studies (GISS) in New York. That is second only to global temperatures in 2016.

In a separate, independent analysis, scientists at the National Oceanic and Atmospheric Administration (NOAA) concluded that 2017 was the third-warmest year in their record. The minor difference in rankings is due to the different methods used by the two agencies to analyze global temperatures, although over the long-term the agencies' records remain in strong agreement. Both analyses show that the five warmest years on record all have taken place since 2010.

Link
5
Science / Re: NH winter cooling
6
Science / Re: NH winter cooling
Wait, so your arguments are almost always met with sarcasm?


An example of the fallacy of presupposition, or loaded question, or trick question, or a false question.  It's used by morons who can't argue with rational ideas, logic or factual data.

No, you moron, it was rhetorical.
:)
7
Politics and Current Events / Re: Trumpocalypse
More possibly fake opinion from someone who purports to know Donald Trump. It can't be as bad as this, can it? I see Tony Schwartz does mention a good point - his drive. So there is that!
8
Politics and Current Events / Re: Trumpocalypse
I am starting to wonder what is going on in foreign policy, particularly the middle East, while the media is entirely focused on the word shithole and the seriously demented shit here.

Seems that foreign policy is being affected by how the rest of the world sees the US since Trump became president.

Link
9
Science / Re: NH winter cooling
It snowed again in Florida, while Russia seems to have broken the all time record (again) for the coldest temperature measured at a weather station.

That clinches it. Snow in Florida. Get stocked up for the next Ice Age!
10
Science / Re: NH winter cooling
No you moron, there is no such thing as global weather.  There is also no such thing as a global temperature, or climate.
Thank you for pointing that out. Weather, is, I should have said, anecdotal.
11
Science / Re: NH winter cooling
The cold kills the bugs that eats the trees!  How can you have any pudding, if they don't eats the trees?
Thank God for the cold.  It should help fight some disease and bug problems from the warmer winters.  Nature is a bitch

So US-centric!  :]  Weather is global.
12
Science / Re: NH winter cooling
It snowed again in the Sahara
But while rare, it's not unheard of. Temperatures at night can plummet. It's the lack of humidity that prevents precipitation. More disturbed weather (as predicted by climate change) can bring in a storm to provide that rare moisture.
13
Politics and Current Events / Re: Trumpocalypse
But don't let me derail from the never-ending story of Trump.

Impressions from across the pond!

14
Politics and Current Events / Re: Trumpocalypse
I didn't realize you were french

hey guys, we have a french friend
Native English, French resident.
15
Politics and Current Events / Re: Trumpocalypse
We really need a French revolution style response to the new aristocracy

I'd like to think you are referring to our shiny, new squeaky clean president, Emmanuel Macron, and his sweeping "revolution" at the ballot box after reinventing French politics from the centre with his brand new, out-of-the-box En Marche movement.

no he's probably not referring to electing a quasi-monarchist shitbag like macron
Yeah, and don't forget his investment banking background. On the other hand he's a good skier and an excellent linguist.
16
Politics and Current Events / Re: Trumpocalypse
We really need a French revolution style response to the new aristocracy

I'd like to think you are referring to our shiny, new squeaky clean president, Emmanuel Macron, and his sweeping "revolution" at the ballot box after reinventing French politics from the centre with his brand new, out-of-the-box En Marche movement.

I worry that the USians who are opposed to Trump don't yet have such an alternative.

By the way, I much appreciate the info that gets presented here on US politics. Fascinating reading and a great distraction from the Brexit disaster. Thanks, seriously.
17
Politics and Current Events / Re: Trumpocalypse
True. It's just that the rest of us are currently getting a rather spectacular example from the self-styled "leader of the free world". The free world is not impressed with where the US is trying to lead it. Your lot spend a lot of time banging on about your Constitution, and it's not looking so crash hot at the moment.
An example.
18
Science / Re: NH winter cooling
Quote
Arctic ocean albedo is probably increased since specular reflection from water at low solar incidence angles is greater than for irregular ice.

Not sure that's correct. See here for instance.
19
Look at this woman, Dave. Is she 'hot'?:



That's Barbara Frum. She died in 1992. She was a deeply respected conservative Canadian journalist. I seriously doubt anyone tuned in to her broadcasts because she was 'hot'. She is well remembered by any Canadian old enough to remember her.

Nobody would care now if she'd been 'hot'. It would be nice if you tried to view women in terms of accomplishment, ability, intelligence, etc. rather than how they make your penis feel.

(Her daughter Linda is a Canadian senator. Her son is David Frum - I assume you recognise that name. He's not as good as his mother, wrote speeches for GW Bush, but drew the line at Trump.)
She looks remarkably like Margaret Thatcher!
20
Offering free and unsought advice (no liability accepted for anyone taking it) from  an outside observer. Perhaps the Democrat organisation could think about alternatives. Maybe look for a candidate for president with fresh ideas, maybe not of retirement age. Asking grass roots for their opinions and take those ideas on board (France's new party organisation, "En Marche" spent time consulting and the result was effective in getting them a huge legislative majority). Concentrate on grassroots funding instead of relying on rich donors who expect payback.  Maybe start  planning for the next presidential election now?
21
Yes, the journalist, Carole Cadwalladr has produced a number of pieces on the subject... More to come!

And I see Robert Mercer has popped up again in a Guardian article on the "Paradise Papers".
22
I'm a UK ex-pat living in France. Brexit and its consequences affect me personally so I've followed the fortunes of some of those closely involved in the referendum process and its aftermath. One such is Nigel Farage who ran a UK political party (UKIP) that was set up largely to promote the UK's exit from the European Union. But Farage then popped up on stage with Donald Trump to support his campaign. I thought it odd at the time. What was the connection, I wondered.

In parallel, I was struck by this odd piece in the Palm Beach Post mentioning one Robert Mercer, a financial backer of the Trump  campaign. It turns out there is a connection between these seemingly unrelated bits of news: Cambridge Analytica.. I read:
Quote
...Alexander Nix, the CEO of Cambridge Analytica, the controversial data firm that helped Trump to power, had contacted Julian Assange to ask him if he wanted "help" with WikiLeaks's stash of stolen emails.

That's the stash of stolen emails that had such a devastating impact on Hillary Clinton in the last months of the campaign. And this story brought WikiLeaks, which the head of the CIA describes as a "hostile intelligence service", directly together with the Trump campaign for which Cambridge Analytica worked. This is an amazing plot twist for the company owned by US billionaire Robert Mercer, which is already the subject of investigations by the House intelligence committee, the Senate intelligence committee, the FBI and, it was announced late on Friday night, the Senate judiciary committee.

I've a suspicion there's more to come.

23
Science / Re: Direct Down Wind Faster Than The Wind
As Brother Daniel writes
Quote
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I give you an actual experiment you can do:
Get in an elevator on the ground floor with a RC helicopter. Get the copter hovering at eye level.
Push the UP button for the tenth floor. Do not change any settings on the helicopter.
I have to give you some credit here:  That's actually a decent experiment to do.
Indeed. You could also perform the experiment horizontally with a prop attached to a cart powered by electric motor, say, and see what difference in speed in still air and steady (down) wind.
24
Science / Re: Direct Down Wind Faster Than The Wind


You sure know how to be wrong Heinz, it may be your best skill. The problem is not precisely framed, in that there are some transients, but there is no doubt at all that the point Alan is making is correct, and that your rebuttal is bullshit.
To know this, we need only consider what happens to a powered aircraft turning in rising air. Just like when it is flying straight, upon entering the rising air, it will rise, with no increased engine power. A powered, turning aircraft's wing is doing exactly what the helicopter rotor blade is doing, precisely the principles apply for lift and drag. Indeed, if two aircraft are turning on the same radius at opposite sides of a circle, it even looks the same. You could put a beam between the wing tips and a seat  swiveled in the middle and it would actually BE a helicopter!
So, your own argument is, as usual, so internally inconsistent that you have just proven yourself wrong. Again.

Gliders climb by circling inside thermals. No power at all except from the wind. Thanks, Semper.  :)
25
Science / Re: Direct Down Wind Faster Than The Wind
Well then, you have found a home in the Cargo Cult, because your understanding of physics is every bit as poor as the rest of the cult monkeys.
In level (horizontal) flight, if the airmass moves at 10 m/sec with respect to the ground, an aircraft's ground speed will be changed by 10 m/sec also, because it moves within and respect to, the airmass. One way to understand this is no work is done by the airmass on the aircraft in moving it horizontally. That is Physics 101.
OK, so you agree that an aircraft suspended in an airmass moving at some airspeed will have different groundspeed, depending on how that airmass is moving with respect to the ground.

Quote
But, what you are talking about is a vertical updraft, and in this case, there must be work done on the helicopter to lift it against the force of gravity. There is no justification at all for your assumption that a vertical updraft of 10 m/sec will cause the helicopter to rise at 10 m/sec. A helicopter is not a neutrally buoyant object!
Apologies for my simplistic approach but I can't seem to make it complicated.

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You would need to show that the lifting force, from the rising air mass, on the helicopter is great enough to do work against the force of gravity to lift the helicopter, and there is no way for you to show that without doing the math, which you have not done. You have simple-mindedly and wrongly assumed it to be so.
I guess the question is first, does a helicopter use less power hovering (maintaining a fixed height wrt ground) in an updraft than in still air? I would have thought this was indisputable. If so, an additional force is needed for the acceleration. It seems obvious to me that that force is supplied by the wind.
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In fact, if you were to try and understand how a propeller works, you might understand that the updraft can actually reduce the propeller thrust, as it may result in reverse flow through the disk. It can also cause a more turbulent flow, and work against the rotation of the propeller, all of which reduces thrust.
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As I said, the updraft might have no net effect, or it may increase lift, or it may decrease lift. There is no simple way of knowing without a detailed analysis and probably an experiment.
There's something Sean Carroll  wrote about frames of references (in From Eternity to Here) that is ringing bells for me, I'm away from home so don't have the reference now.
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The reason none of this makes sense to you is simply that you don't know the physics involved, and rather than try to learn, you would rather make stupid assumptions; making you just another brain-dead follower of the cargo cult.
I am not entirely ignorant of physics or math. It's a bit like the difference between playwrights and critics. Are you seriously suggesting that a helicopter will behave erratically in an updraft rather than regularly  and predictably?