215 posts • joined 9 Aug 2007
Re: rosetta data
From the Rosetta/ESA faq at http://www.esa.int/Our_Activities/Space_Science/Rosetta/Frequently_asked_questions
"The principal investigators head up the teams building the Rosetta instruments and will have the exclusive right to work with the data for six months. After this period, the data will be stored in ESA’s Planetary Science Archive and made freely available to the world's scientific community."
Re: Mr Hawking – Over-rated - Big Bang Mythology
Regarding your fourth sentence specifically, you are right in that Hawking is neither an Einstein or Newton; his scientific output simply doesn't have the widespread implications and/or impact of either - but then neither do the results of most scientists, however eminent.
Nevertheless, his personal circumstances, what with the wheelchair & robot voice do give the media a nice hook with which to sell stories about his work and/or life to the public. Thus the public have heard of him, and since the public generally admires and trusts scientists, his public profile exceeds his scientific impact.
But I don't think that outcome is a reason to be quite as negative about him as you seem to be; especially as he is neither responsible for the (cosmological) Big Bang theory, or any scientific CO2/climate predictions that I'm aware of.
No need to downvote, a reply is more useful.
You can do quite interesting things with water waves - even make an expanding ripple pattern reform back down to a point again ... and again and gain and again.
Re: I'd rather have user-defined system-wide granular app permissions
I'd rather I could just run android as a UI choice on top of a reasonably standard linux install of some kind.
I expect to be waiting some considerable time. :-)
Re: How would the 'smartphone app' work without changing the meter?
Perhaps by taking a dated photo of the meter, and sending it to the energy supplier? :-)
Re: An R&D division that [is] not only not a money loser, but actually turns in a profit
It seems to me that a good R&D division should lose money in the same way a good venture capitalist loses money: there might well be frequent losses on things that don't work out, but the (few) winners more than make up for those losses.
Whether the "win" project profits get attributed to the actual R&D division is another matter.
Re: Could those who downvoted please explain why?
I didn't downvote, but since the authors seem to have plotted the daily data as well, they could hardly have said to have "destroyed" data - any level of "falsity" induced by their smoothing was evident to the interested reader, as indeed the artefact you mention was to you.
More generally, smoothing may be an imperfect process but it can be very useful for extracting trends, if appropriate care is taken. Ideally, you would make sure to plot the original data along with the smoothed curve, for comparison :-)
Re: Fortunately, human activities helped to counteract the lower solar output
Note that the interaction of extra atmospheric CO2 and glacials has been looked at, e.g.
Damping of glacial-interglacial cycles from anthropogenic forcing
Climate variability over the past million years shows a strong glacial-interglacial cycle of ~100,000 years as a combined result of Milankovitch orbital forcing and climatic resonance. It has been suggested that anthropogenic contributions to radiative forcing may extend the length of the present interglacial, but the effects of anthropogenic forcing on the periodicity of glacial-interglacial cycles has received little attention. Here I demonstrate that moderate anthropogenic forcing can act to damp this 100,000 year cycle and reduce climate variability from orbital forcing. Future changes in solar insolation alone will continue to drive a 100,000 year climate cycle over the next million years, but the presence of anthropogenic warming can force the climate into an ice-free state that only weakly responds to orbital forcing. Sufficiently strong anthropogenic forcing that eliminates the glacial-interglacial cycle may serve as an indication of an epoch transition from the Pleistocene to the Anthropocene.
Re: Any suggestions
Hang on, what was that rpg with all the clones, and some kind of repeating "The Google is your friend" motif..?
If this was such a dull & almost-pointless paper ...
... why didn't you choose to write about an interesting one instead? I mean, we all do like to sneer at economists a bit, if even only for entertainment, but actually I was hopng for something fractionally more informative.
Re: See the Drake Equation.
The problem with the Drake equation is that although it partitions all the unknowns into types, it doesn't make them less unknown. It's better to think of what a pututative spacefaring civilization might get to do, and under what circumstances - see e.g.
Re: Lets not ruin space too.
Space is quite big. Even the most enormous galaxy-spanning human civilization of popular fiction would struggle to make even a slight mess of all space. Even blowing up a galaxy would scarcely dent Space.
Re: control 4 billion
"I felt a great disturbance in the force, as if billions of lightbulbs cried out in terror, and were suddenly darkened"
Possibly also required, reading the study itself...
E.g. "On Facebook, people frequently express emotions, which are later seen by their friends via Facebook's "News Feed" product (8). Because people's friends frequently produce much more content than one person can view, the News Feed filters posts, stories, and activities undertaken by friends. News Feed is the primary manner by which people see content that friends share. Which content is shown or omitted in the News Feed is determined via a ranking algorithm that Facebook continually develops and tests in the interest of showing viewers the content they will find most relevant and engaging. One such test is reported in this study: A test of whether posts with emotional content are more engaging."
The following paragraph is also informative as to what process was followed.
Re: does heat bend light?
heat is energy, and energy bends spacetime, and light beams follow curved paths in curved spacetime. So yes, heat does bend light.
Re: I guess Franson must have assumed ...
If it's on the arXiv, you dont have to guess. You can go check it yourself. Or indeed you can check the open access article itself, using the links in the Reg article.
Re: how can an island just appear?
How? By magic, apparently. :-)
And before all you nay-sayers start off, it is well known that any sufficiently primitive magic is indistinguishable from technology (or, possibly, just indistinguishable from some not especially obvious physical process or other).
Here's at cut&paste of the conclusion of the article...
... because how something is said is also useful:
The results of the present study indicate that most of the glaciers were in a steady state compared to the results of other studies carried out for the period prior to 2001. This period of monitoring almost corresponds to hiatus in global warming in the last decade . It may happen that an interval of one decade could be smaller than the response time of glaciers to be reflected in terms of any significant change with 23.5 m spatial resolution of data. This point requires further studies using high-resolution data for a longer interval of time.
So, should we trust these results now, even though the authors themselves worry about the data resolution on which they are based? Or should we wait for a more solid confirmation before using them to inform our actions?
"can be viewed even with low-power binoculars "
does this, for most of us, really mean "might be seen with binoculars, if only it wasn't for all the light pollution"?
(can be found in kstars, for those with KDE stuff on their system)
anyone planning on a big network rewiring job?
... maybe you should read this:)
Easily repairable networks
Robert S. Farr, John L. Harer, Thomas M. A. Fink
We introduce a simple class of distribution networks which withstand damage by being repairable instead of redundant. We prove a lower bound for the expected cost of repair, and show that for networks on the square and triangular lattice, this bound is achievable and results in a network with exactly three levels of structural hierarchy. We extend our results to networks subject to repeated attacks, in which the repairs themselves must be repairable. We find that, in exchange for a modest increase in repair cost, such networks are able to withstand any number of attacks.
Re: LOHAN could be coming from 70.000 ft through a window very close to you ...
and will she be bringing some Milk Tray?
Re: I used to have a small PDA device ...
I've got an old Zaurus I would sell you ... except I'm still using it. Otherwise couldn't agree more ... if only I could get Opie on my phone instead of android :-)
Re: So what are the 'things'
Since this is the London Underground we're talking about, I think by IoT they mean either "Internet of Trains", or "Internet of Tubes"
Re: "If he were to sum up the quarter in two words it would be “execution and transition.”"
hah! - but to sum up in words of just one _sound_ is the best thing to do
the lightbulb moment...
pawlik: "all the very disappointed customers who say 'oh, I bought my lightbulb but now I can't switch it on and off anymore because I can't reach it on the internet.'"
Well, back to candles it is, then.
Re: planned obsolescence [...] Planet Linux does it too
Oh no! Are they going to retire the fvwm window manager now? Dammit, I'll have to switch back to twm!
you might want to be careful: one newspaper claimed today that scientists had discovered a new (invisible) eighth colour of the rainbow. But they really had - over two centuries ago: see W. Herschel, "Experiments on the Refrangibility of the Invisible Rays of the Sun", circa 1800. http://www.jstor.org/stable/107057
Re: mining Bitcoins...
... and so some are already working on ow to maximise return, see e.g.:
Do Bitcoins make the world go round? On the dynamics of competing crypto-currencies
Stefan Bornholdt, Kim Sneppen
Bitcoins have emerged as a possible competitor to usual currencies, but other crypto-currencies have likewise appeared as competitors to the Bitcoin currency. The expanding market of crypto-currencies now involves capital equivalent to US Dollars, providing academia with an unusual opportunity to study the emergence of value. Here we show that the Bitcoin currency in itself is not special, but may rather be understood as the contemporary dominating crypto-currency that may well be replaced by other currencies. We suggest that perception of value in a social system is generated by a voter-like dynamics, where fashions form and disperse even in the case where information is only exchanged on a pairwise basis between agents.
Re: thermometer reading at a rural weather station
... but how does that reading map onto the average temperature of the area in which it inhabits? Is it intended to represent a ground temperature or an air temperature? What if I want to use it as a measure of air temperature in a surrounding box of area A and height h? Do the thermometers have a changing response as they age? Can I trust what the manufacturer said? What about when they are replaced for new ones with different properties? How do we correct for the changing nature of the landscape around it? Thinks like this need to be checked and ironed out.
Re: much data manipulation
As it happens, here's a recent discussion of solar irradiance validation
(but published formally in Astrophysics and Space Science 350(2), 421-442, 2014)
Would you like the raw satellite data as well? I'm sure there are all sorts of ways the existing analyses could be challenged (apart from those covered in the paper already, of course).
Re: much data manipulation
It's important, however, to distinguish between types of "manipulation"
(a) that done with intent to deceive
(b) that done by mistake or carelessness
(c) that done as part of a calibration or compensation process to ensure the numbers output by the sensor correspond (to the greatest extent achievable) to what the sensor data is understood to mean (or is intended for use as).
This raw data you are so keen on may or may not be what you think it is, or may or may not be misleading (wrt your purpose) in subtle ways. For example, a few years ago, I happened to have a conversation with a physicist whose specialism was (IIRC) the calibration of satellite data related and needed for an estimation of the Earth's energy budget. Such things are not trivial.
Re: how to communicate
Those interested in the dynamics of social discourse may find the following article amusing:
Mental ability and common sense in an artificial society
Krzysztof Malarz, Krzysztof Kułakowski
We read newspapers and watch TV every day. There are many issues and many controversies. Since media are free, we can hear arguments from every possible side. How do we decide what is wrong or right? The first condition to accept a message is to understand it; messages that are too sophisticated are ignored. So it seems reasonable to assume that our understanding depends on our ability and our current knowledge. Here we show that the consequences of this statement are surprising and funny.
Re: Years ago
Personally, I could quite imagine citizens of ancient Rome standing round so that they matched up with nearby statues or other representational art in some amusing way, let alone the reasonable likelihood boxes of old Edwardian b&w photos doing a similar thing with paintings or whatever; or someone or other doing this - with actual album sleeves - in the 70's.
No doubt someone might have some sort of priority claim over this kind of amusement, but I not only strongly suspect they have been dead a while, but they might even have been dead for millenia.
Re: bring the rock into orbit around Terra.
... isn't NASA planning such a mission? Although the aim is to put it in orbit around the moon instead....
Re: I can't see ... what much coherent story can be told after I to VI ...
hmm .. something that goes off at a tangent, and does something new with the SW storyverse, whilst also cleverly including hints to set the scene for the next sequel trilogy after this one? :-)
Re: "the actual paper is perfectly correct, it's the press release that is wrong."
... so a lesson for scientists - check that press release drafted by the institutional PR department, and make sure it's right (or at least not-wrong ... they're doing their best but they aren't experts). In my case, we rewrote it substantially. That said, you have very little control over what gets bootstrapped by journalists off the back of the release - or worse, of a press-agency remangled precis of the press release.
Re: 1.49597871 × 10^15m
Hmm ... Register Units?
About 8 mReg?
(Being 8/1000 of the distance from here to Regulus. Although mysteriously, the Register-star is in the constellation of Leo (probably eating its entrails...), and will be obscured by 163 Erigone on the morning of March 20th - expect articles to go missing or be delayed around that time.)
1.49597871 × 10^15m
... is about 1/6 of a light year, if it helps any.
Presumably this is the peer-reviewed version?
An Objective Bayesian Improved Approach for Applying Optimal Fingerprint Techniques to Estimate Climate Sensitivity
JOURNAL OF CLIMATE 26, n19, 7414-7429 (2013)
A detailed reanalysis is presented of a Bayesian climate parameter study (as exemplified by Forest et al.) that estimates climate sensitivity (ECS) jointly with effective ocean diffusivity and aerosol forcing, using optimal fingerprints to compare multidecadal observations with simulations by the Massachusetts Institute of Technology 2D climate model at varying settings of the three climate parameters. Use of improved methodology primarily accounts for the 90% confidence bounds for ECS reducing from 2.1-8.9 K to 2.0-3.6 K. The revised methodology uses Bayes's theorem to derive a probability density function (PDF) for the whitened (made independent using an optimal fingerprint transformation) observations, for which a uniform prior is known to be noninformative. A dimensionally reducing change of variables onto the parameter surface is then made, deriving an objective joint PDF for the climate parameters. The PDF conversion factor from the whitened variables space to the parameter surface represents a noninformative joint parameter prior, which is far from uniform. The noninformative prior prevents more probability than data uncertainty distributions warrant being assigned to regions where data respond little to parameter changes, producing better-constrained PDFs. Incorporating 6 years of unused model simulation data and revising the experimental design to improve diagnostic power reduces the best-fit climate sensitivity. Employing the improved methodology, preferred 90% bounds of 1.2-2.2 K for ECS are then derived (mode and median 1.6 K). The mode is identical to those from Aldrin et al. and [using the same Met Office Hadley Centre Climate Research Unit temperature, version 4 (HadCRUT4), observational dataset] from Ring et al. Incorporating nonaerosol forcing and observational surface temperature uncertainties, unlike in the original study, widens the 90% range to 1.0-3.0 K.
Re: What an amazing ...
Indeed, it can be rather interesting to treat ancient (or even Medieval) science seriously ... e.g. this (nothing to do with dark matter or pyramids, mind)
A Medieval Multiverse: Mathematical Modelling of the 13th Century Universe of Robert Grosseteste
Bower et al.
Abstract: In his treatise on light, written in about 1225, Robert Grosseteste describes a cosmological model in which the Universe is created in a big-bang like explosion and subsequent condensation. He postulates that the fundamental coupling of light and matter gives rises to the material body of the entire cosmos. Expansion is arrested when matter reaches a minimum density and subsequent emission of light from the outer region leads to compression and rarefaction of the inner bodily mass so as to create nine celestial spheres, with an imperfect residual core. In this paper we reformulate the Latin description in terms of a modern mathematical model. The equations which describe the coupling of light and matter are solved numerically, subject to initial conditions and critical criteria consistent with the text. Formation of a universe with a non-infinite number of perfected spheres is extremely sensitive to the initial conditions, the intensity of the light and the transparency of these spheres. In this "medieval multiverse", only a small range of opacity and initial density profiles lead to a stable universe with nine perfected spheres. As in current cosmological thinking, the existence of Grosseteste's universe relies on a very special combination of fundamental parameters.
Re: Vectored thrust...
Hmm ... surely all thrust is vectored? I mean, how could one make sense of something caller "scalar thrust" (or "bi-vector thrust", for that matter)
/takes of geometric algebra hat and returns to coffee
Re: Lets start ...
I agree. But before you cackle with glee at the thought of how you might cleverly dismantle the data or assumptions behind some research finding or other, you might want to consider that you'll actually have to engage with the technical content, rather than the simanglified version of it reported by your favourite news provider. You will almost certainly find the experience a chastening one - even as a scientist, peer reviewing papers in your own field can be extremely hard work - so how might it be for the non-specialist?
Re: "The research is ours "
Tom 7, that's not necessarily true - even on a directly taxpayer funded grant, you just paid for /some/ of it. I do not want to deny the very significant claim the taxpayer/donor might have as a result of their funding, but if you really wanted to claim the lot - lock, stock, and barrel - then you really should have been paying more than you did.
E.g. EPSRC grants are now calculated on a "full economic costing" basis, which is indeed an attempt to charge for everything associated with a grant (even overheads like fractional office space, etc), whereas before that was not the case. As a result, the taxpayer now pays more, and, I suppose, also gets more claim. I do hope you are enjoying that sense of ownership over your personal fraction of the 1/4 of a room in a 50's office building that I inhabit while at work :-) Some charities (as I understand it) refuse to pay (some types of) overheads, and so, I suppose, have less claim.
In this specific context, note that taxpayer funded research has not always included money for publication costs. If the taxpayer didn't pay publication costs, then they didn't pay to get free access to read the results. Maybe things should have been different, and, as I said above, things are changing now, ... although the result will not be some kind of utopia. Notably, taxpayers/donors will pay for the extra access for everyone that you & I want, but the vast majority of those granted access to the literature will either not bother or find it beyond them.
Every tax payer should have access to *any and all* research ...
Well, I agree. But the funding doesn't work like that yet, although here in the UK we are making the transition. Personally, I try to avoid publishers with illiberal redistribution policies, and put a version of all my output on arXiv irrespective of its appearance in a journal.
There are costs in the new model though - notably authors (mostly taxpayer or charity funded) will (now) have to pay publishing costs themselves, typically in the range £1000-£2000 per article, so the tax payer/charity donor will end up paying this. Further, anyone without funding - say an independent researcher, one whose funding/employment has just terminated, a new PhD trying to write up work independently, someone trying to publish work their institution doesn't care about (or perhaps even doesn't like) - now also has to (will have to) pay these costs, which are not negligible. The "author-pays" model on which your proposal rests will narrow the range of people with the ability to publish their science.
Further, when this new model is in place in the UK, you will perhaps notice that UK taxpayers and UK charity donors are making UK research free-to-view for a global audience, but the arrangement might well not be reciprocated. Some may be unhappy at such a situation.
Lastly, I find that I am inclined to feel that if a journal charges authors, they should also pay the reviewers (such as myself), who currently do it for free. Should peer review turn into a paid-for process?
So: the simple proposal you advance (and with which I generally agree) is not necessary so simple execute in a fair manner, there may well be unintended consequences, and it isn't "free", even to taxpayers & donors.
Re: It's one of the many reasons @ Mike Bell
Yes, but don't think just by calling yourself "Mike" is going to let you off - we all know you personally are responsible for the inequalities, John.
Re: How the hell do you squeeze a vacuum?
Strictly speaking, a squeezed vacuum isn't a vacuum - it has photons in it. It's called a vacuum because it has a zero amplitude, but in fact its quantum uncertainty has carefully arranged correlations, for which some excitation above the true vacuum are required.
Or: a squeezed vacuum not a vacuum, we just call it that because the field amplitudes measure (in average) as zero. But a photon number measurement will be non-zero.
 Assuming we're talking about an electromagnetic (squeezed vacuum) state.
Re: for true innovation / dress to blen in
hmm ... so maybe some episodes in pre-revolutionary France?
good old 1987a
... my favourite ever supernova. Because I volunteered to be sent up a hill in the south island to help (very slightly, and in a not very critical role, as an MSc student) with the building of the JANZOS cosmic ray observatory. I think I might have moved some thingies from here to there, or possibly put one sort of thingy on top of another sort of thingy, or joined thingies together, in somewhat chilly weather.
Re: comic books, novelty ties and ironic t-shirts.
Oh, I don't know. You'd be surprised at how artistic theoretical calculations, computer modelling, and (e.g.) high-vacuum cold atom sculpture is. Especially once it had been properly funded.
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