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Liquid Hydrogen Powers a UAV For a Cool 48 Hours

bothemeson There's something odd about the discrepancy (72 comments)

Great comments :-) - notice how the navy's own page says "The craft shattered all previous endurance records [having previously noted the navy's 40-minute flight in 1924] performed by similar, propeller driven, fossil fuel and battery-powered UAVs by completing an uninterrupted 26-hour flight carrying a five-pound payload."?

about a year and a half ago
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Carbon Dating Gets an Update

bothemeson Old news (137 comments)

The Internationally agreed Radiocarbon calibration curve (IntCal) - co-ordinated from Belfast University - takes info from ice-cores, lake sediment cores, tree-rings, corals, etc from the Southern and Northern hemispheres (there's an offset between them) puts them together (this work is done by statisticians using specially developed methods rather than other scientists using off-the-shelf techniques) and although some scientists would rather that only their work was used (as they can then claim whatever 'accuracy' they wish to claim) independent verification of lab practices is extremely useful in the work. The most recent published work dates back to 50,000 years BP ('before present' where 'present' is 1950) and the next set of curves (IntCal 12) - being worked on at the moment will take it back further. Abstract for IntCal 09 - http://eprints.whiterose.ac.uk/10694/

about 2 years ago
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Google+ Already At 10 Million Users

bothemeson invite, yes please (1223 comments)

meson@f2s(dot)com - many thanks...

more than 3 years ago
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92,000 LEGO Robots To Take Over Peruvian Schools Alongside OLPC

bothemeson Re:tablets are for idiots (56 comments)

difficult to reply to this.... did you mean something when you typed it? keep taking the tablets ;-)

more than 3 years ago
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Internet Groups To Stream Live IPv4/6 Announcement

bothemeson Last post (185 comments)

the robotic overlords invite us to the news of the millenia!

more than 3 years ago
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Medical Researcher Rediscovers Integration

bothemeson Re:Number of citations... (473 comments)

I'm mainly with you on that one, but SPSS is also a reckless black box as far as I'm concerned. Too many of the options have no statistical legitimacy, merely having been found useful in the past as quick fixes.

Given the complexity of interrelated issues in medical stats, I'd prefer people to get serious about their science and use Bayesian methods so that competing theories can be compared for a wide range of parameters. Harnessing stats to the classical reasoning that has no validity in applications was only responsible when computing power was the limiting factor. R and C/C++ would be my preferred current vectors of persuasion. Best wishes for your mission...

more than 3 years ago
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Medical Researcher Rediscovers Integration

bothemeson Re:Number of citations... (473 comments)

Sorry dude, I call cop-out - I've seen many, many, research proposals and been a part of rating them for funding purposes.

Hardly any peer reviewers know enough about how to rate the maths part of the methodology, even where the Principle Investigator mentions one.

Mainly you get a bit of waffle that might mention a software package or previous piece of uninspiring work. Given no alternatives they get funded.

more than 3 years ago
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Medical Researcher Rediscovers Integration

bothemeson Re:Number of citations... (473 comments)

You have my sympathy :-) It does sound like your boss has a tight grip - hopefully s/he does know that outliers can be random artifacts..!

One of my favourite examples of this sort of thing is a radiocarbon calibration package (OxCal), put together by a physicist at Oxford University which has a popular radio-carbon lab.

This software provides access to an option that was only originally there to do quick and dirty tests of the software itself, it has proved to be the most commonly used function (as cited in journals) despite being a 'black box' with no methodological basis because it 'gives the smoothest curve'! What a life, huh?

more than 3 years ago
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Medical Researcher Rediscovers Integration

bothemeson Re:Number of citations... (473 comments)

in a word, yes, check out almost any medical stats methodology - it looks sort of right if you have only degree level maths but, eg, statisticians have pretty much given up on pointing out that treating binned averages of a population as raw data typically invalidates the method under consideration, rendering the results speculative at best.

researchers will tend to insist that what they have handed over is raw data because they have (or a research associate, or Excel! has) only performed a few simple transformations on it and, that being many months ago, probably have forgotten the fact. one can either keep performing extra (unpaid and unasked for) analyses showing that this distribution verges on the impossible (and risk not be asked for help in future) or shut up and get cited and allow your reputation to grow

having said that, the same is true for many scientific practitioners and, indeed, the majority of published journal papers - the peer review generally doesn't extend to a competent mathematical practitioner (still less frequently a statistician) and most academics do not appear to consider that anything beyond their (often high school- or graduate-level) understanding of mathematics is required, after all (like the paper concerned here) building on previously published and highly cited work of little worth is all that's required for a career

more than 3 years ago
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Palestinian flotilla vs. Israeli navy online

bothemeson Re:So far (6 comments)

You could also check what Debka (allied with Israeli Intelligence) have to say:- http://debka.com/article/8824/ BTW I should mention (regarding my previous post) that I accept that NASA landed men on the moon!

more than 4 years ago
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Palestinian flotilla vs. Israeli navy online

bothemeson Re:So far (6 comments)

OK, so I think you should watch (esp the first of) those videos in slo-mo and critically: Now tell me what you notice about the way the helicopter and its' rope interacts geometrically with the boat. The second vid means nothing.

more than 4 years ago
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Palestinian flotilla vs. Israeli navy online

bothemeson So far (6 comments)

people 'replying' seem to be listening to the 'news' only from one side and confusing Palestinians with other Arabic groupings. I agree with nbauman that "Neither Hamas nor the Israelis are angels" would that other postings were so even-handed.

more than 4 years ago
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London's Mayor Promises London-Wide Wireless For 2012 Olympics

bothemeson Has Boris thought.... (130 comments)

how many lamp-posts there are in London? He's a well-meaning right-wing buffoon.

more than 4 years ago
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Open Source Is Not a Democracy

bothemeson Re:Why left? (641 comments)

Finally, someone who has done their research.

more than 4 years ago
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Why Programmers Need To Learn Statistics

bothemeson Re:They probably were told... (572 comments)

I call Trollshit! The classical frequentist assembly of statistical theorums has only disparate theoretical foundations (which indeed often are mutually antagonistic) - that nice distribution curve and 2-sigma point, what were they based on?

With Bayes' theorum, models are created such that rival theories can be compared, with a common framework, to all *available* data *plus* theoretical biases, more data can be added and different theories applied. In almost no circumstances is this 'safe' mathematically (although it's often done) in the frequentist world. As for confidence intervals... as these are based on what the 'experts' of the time will wear, these are simply loose adoptions of a part of the Bayesian paradigm without the rigour.

I must express an interest, here, my partner is a Professor (in the British sense, rather than 'lecturer' as I believe it to be used in the US) of Bayesian statistics having lectured in archaeology (a discipline in its' own right here in Europe) and seen how dreadful was the state of maths in the physical sciences that handled data that lead to 'results' for archaeologists.

It's still as bad in most subjects where maths is the prerequisite discipline: maths is most often a discipline for people with a belief system resembling the quote above. Statisticians have early on to learn that the specialist they are taking data from has often, for example, binned and averaged the data already (by the use of specific lab protocols or, sometimes, software) and doesn't begin imagine that this will have an impact on the stats methodology and so will not mention the fact. Often this invalidates the stats method used but no-one will know and so the project is wasted effort but published nevertheless and enters the canon of 'wisdom'.

Seeing the state of climate research just makes the numerate weep - the same old frequentist methods, modified slightly, trotted out without examination by people who know that you won't get sacked for using a 'tried and trusted' method even where it's patently wrong to statistical experts who don't stick their neck above the parapet. It's no wonder that the results of very few science papers in 'learned journals' can be repeated, often the method claimed hasn't been used (their 'data' wasn't raw) even though the authors sincerely believe that it has.

more than 4 years ago
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Archiving Digital Artwork For Museum Purchase?

bothemeson Re:REPLY TO SENDER !! (266 comments)

Someone, please, mod this up!

about 5 years ago
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Upgrade IE6: Help Fight World Hunger

bothemeson Ditch IE (2 comments)

'Upgrade' as in 'ditch' Full Stop (no, not an anagram of First Post!).

more than 5 years ago

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