Sunday, 16 March 2008

Global Warming and Social Warming

One of my favourite authors of sociophysics papers, Serge Galam, has published an interesting short analysis of social phenomena associated with the frenzy of words and resolutions (hardly a frenzy of real activities) that is called `response to the Global Warming threat'.

The paper, found on arXiv, Global Warming: the Sacrificial Temptation argues that the emotional side of the situation has led all research on the warming and conclusions of such research away from the scientific princliples.

Let me quote the abstract and conclusions of this paper:

The claimed unanimity of the scientific community about the human culpability for global warming is questioned. Up today there exists no scientific proof of human culpability. It is not the number of authors of a paper, which validates its scientific content. The use of probability to assert the degree of certainty with respect the global warming problem is shown to be misleading. The debate about global warming has taken on emotional tones driven by passion and irrationality while it should be a scientific debate. The degree of hostility used to mull any dissonance voice demonstrates that the current debate has acquired a quasi-religious nature. Scientists are behaving as priests in their will "to save the planet". We are facing a dangerous social phenomenon, which must be addressed from the social point of view. The current unanimity of citizens, scientists, journalists, intellectuals and politicians is intrinsically worrying. The calls to sacrifice our way of life to calm down the upset nature is an emotional ancestral reminiscence of archaic fears, which should be analyzed as such.


To sum up above analysis of the social and human aspects of global warming, most caution should be taken to prevent opportunistic politicians, more and
more numerous, to subscribe to the proposed temptation of a sacrifice frame in order to reinforce their power by canalizing these archaic fears that are reemerging. Let us keep in mind that in a paroxysm crisis of fear, opinions can be activated very quickly among millions of mobilized citizens, ready to act in the same direction, against the same enemy: it then enough to designate it.


Read it, even if you fear the global warming.

Friday, 14 March 2008

New Scientist and dark energy without dark energy

Some time ago I have decided to subscribe to New Scientist. My reactions are, on the average, rather mixed. Half o f the printed pages are taken by job postings for UK (which are rather uninteresting for me. And the general tabloid style, which I have already ridiculed here is a bit too tabloid.

But there is a positive side of the `hunt for the NEWS' approach, which, in summary more than compensated the shortcomings. It is exactly the tabloid style hunt for the man bites dog sensational news that allows to find scientific research that is off the beaten path.

The reason for this mention is the reference to works of David Wiltshire, especially his efforts to build alternative to the cosmology model. Ever since the discovery of the acceleration of the expansion of the Universe, I have felt that the acceptance of the Dark Energy/Dark Matter Universe, despite the 120 orders of magnitude discrepancy with the basic quantum `explanation', was a bit too fast.
My own experiences with solid state physics are that if anyone proposes an explanation that is off the data by, a single order of magnitude, it is `suspect', two orders make it useless. But hundred and twenty orders of magnitude? Yet the astrophysics community has accepted the 70%/25%/5% explanation so easily, without real understanding about what these 95% of the Universe are made of. Carroll's Preposterous Universe offers a good label for this quick understanding.

For these reasons I am grateful to the New Scientist for pointing out the work of Wiltshire. His papers, on Dark Energy without Dark Energy and Cosmic clocks, cosmic variance and cosmic averages, available on the WEB, are rather difficult in their mathematical part, but they are also very pedagogical.
In the words of the author:
An overview is presented of a recently proposed "radically conservative" solution to the problem of dark energy in cosmology. The proposal yields a model universe which appears to be quantitatively viable, in terms of its fit to supernovae luminosity distances, the angular scale of the sound horizon in the cosmic microwave background (CMB) anisotropy spectrum, and the baryon acoustic oscillation scale. It may simultaneously resolve key anomalies relating to primordial lithium abundances, CMB ellipticity, the expansion age of the universe and the Hubble bubble feature. The model uses only general relativity, and matter obeying the strong energy condition, but revisits operational issues in interpreting average measurements in our presently inhomogeneous universe, from first principles. The present overview examines both the foundational issues concerning the definition of gravitational energy in a dynamically expanding space, the quantitative predictions of the new model and its best-fit cosmological parameters, and the prospects for an era of new observational tests in cosmology.

While the calculations are rather intricate (too intricate for this amateur), the background physics and assumptions used are physical common sense and with much closer links to reality (such as observations of inhomogeneity of the Universe) that the Dark Energy models.

Why is then Wiltshire's work not the hot topic of astrophysics conferences?

Sunday, 2 March 2008

Cultural Natural Selection

An interesting paper by Rogers and Ehrlich, titled Natural selection and cultural rates of change, published in a recent edition of PNAS, has brought my attention to the issue if some principles of the Darwinian evolutionary theory might be applicable to cultural transmission. The findings document the intuitive reasoning that it should be so.

It has been claimed that a meaningful theory of cultural evolution
is not possible because human beliefs and behaviors do not follow
predictable patterns. However, theoretical models of cultural
transmission and observations of the development of societies
suggest that patterns in cultural evolution do occur. Here, we
analyze whether two sets of related cultural traits, one tested
against the environment and the other not, evolve at different
rates in the same populations. Using functional and symbolic
design features for Polynesian canoes, we show that natural
selection apparently slows the evolution of functional structures,
whereas symbolic designs differentiate more rapidly. This finding
indicates that cultural change, like genetic evolution, can follow
theoretically derived patterns.


Of course the mechanisms of change are different: in place of biological mutations we have innovation and cultural drift. But the stabilizing (or destabilizing) effects of selection on those traits that have strong link with reality which may influence the survivability of individuals and societies (canoe design, but also obviously, building design, food preparation etc.) are the same in mechanisms in biology and cultural change. The difference between the observed rates of change in functional and decorative design elements of canoes provide not only beautiful observational example of such differentiating process in action, but also are reminiscent of the `Spandrels of San Marco' discussion. Is it possible that a functional (i.e. selective) element in canoe design could come from a decorative change?
What was the origin of the high bows of the Viking boats? Was it technical/functional when conceived? I guess that yes, but perhaps there is more to the story?

In any case, this is a short but quite interesting paper.

Crowd Behaviour, continued

Following the topic of the previous post: fortunately, the search through references has been possible, and thus I have been lucky enough to read four of the key papers related to the field under discussion.

It seems that indeed, animals and humans alike may be led by relatively small groups of informed individuals, and that in most cases such non-democratic methods do have an advantage (for example in choosing when/where to feed, or in choice of the new location for a bee swarm). Whether the selective advantages of such a method of being led by small `informed' minority are applicable to human societies is an interesting question, both from scientific and from political point of view.

The paper mentioned in the previous post, Consensus decision making in human crowds, by Dyer at. al. depicts a very interesting experiment, where conditions reduce humans to `animal' status, by careful choice of setting where verbal and sign communications are prohibited. Despite the limitations, strong correlations were observed.

For those interested in following the trail deeper, I suggest the following papers:

Evolutionary Origins of Leadership and Followership, by Van Vugt

Consensus decision making in animals, by Conradt and Roper
Group decision-making in animals by Conradt and Roper

and

Effective leadership and decision-making in animal groups on the move by Couzin et. al.

Friday, 22 February 2008

Crowd behaviour

Some time ago I have dabbled in simplistic modelling of decision making in networked societies. While large scale decisions, in weakly connected environments, such as political choices in country sized society, where most of the participants can interact only indirectly, via many links or via general communication tools, such as media, are rather difficult to study and observe `in real life', it seems that the research on crowd behaviour is much easier.

A recent publication by a group od researchers at the University of Leeds that humans flock like sheep and birds, subconsciously following a minority of individuals. It takes a minority of just five per cent to influence a crowd’s direction – and that the other 95 per cent follow without realizing it.


Comparing this to animal behaviour might be really interesting. But also the nature of the links in the crowd, where interactions span almost the whole group - but are of necessity very shallow in information transfer (we observe only very superficial and incomplete indcators of others decision reasoning, process and results) is quite interesting.

Tuesday, 19 February 2008

We are the champions - national pride in Science

Recent discovery of a stellar system that contains two planets that closely resemble Jupiter and Saturn, and thus offer great similarity to our own solar system has resulted in quite curious `national' observation.

Most of the Polish newspapers and TVs have reported this under the titles of "Polish scientist discover a Solar-like star system". One TV news programme has even suggested that the Polish team should get Nobel Prize for the discovery. (To be fair, they have asked a researcher from Oxford and he clearly replied NO).

On the other hand most of the US news agencies and papers have not reported ANY Polish involvement. For example in the Reuters newsfeed we find

Scientists and amateurs find new solar system

WASHINGTON (Reuters) - Astronomers and amateur stargazers have used an unusual technique to find a solar system that closely resembles our own and say it may be a new and more productive way to scour the universe for planets -- and life.

They said technique, called microlensing, shows promise for finding many more stars, perhaps with Earthlike planets orbiting them.

"We found a solar system that looks like a scaled-down analog of our solar system," Scott Gaudi of Ohio State University, who led the study, told reporters.

The new solar system, described in Friday's issue of the journal Science, has two planets of similar size and orbit to Jupiter and Saturn. It is the first time microlensing has been used to find two planets orbiting a single star.


Let's have a look at the original paper, published in Science. The author list is quite impressive - and one can find both Scott Gaudi and many Polish astronomers there, as well as many others.
B. S. Gaudi, D. P. Bennett, A. Udalski, A. Gould, G. W. Christie, D. Maoz, S. Dong, J. McCormick, M. K. Szymanski, P. J. Tristram, S. Nikolaev, B. Paczynski, M. Kubiak, G. Pietrzynski, I. Soszynski, O. Szewczyk, K. Ulaczyk, L. Wyrzykowski, The OGLE Collaboration, D. L. DePoy, C. Han, S. Kaspi, C.-U. Lee, F. Mallia, T. Natusch, R. W. Pogge, B.-G. Park, The µFUN Collaboration, F. Abe, I. A. Bond, C. S. Botzler, A. Fukui, J. B. Hearnshaw, Y. Itow, K. Kamiya, A. V. Korpela, P. M. Kilmartin, W. Lin, K. Masuda, Y. Matsubara, M. Motomura, Y. Muraki, S. Nakamura, T. Okumura, K. Ohnishi, N. J. Rattenbury, T. Sako, To. Saito, S. Sato, L. Skuljan, D. J. Sullivan, T. Sumi, W. L. Sweatman, P. C. M. Yock, The MOA Collaboration, M. D. Albrow, A. Allan, J.-P. Beaulieu, M. J. Burgdorf, K. H. Cook, C. Coutures, M. Dominik, S. Dieters, P. Fouqué, J. Greenhill, K. Horne, I. Steele, Y. Tsapras, From the PLANET and RoboNet Collaborations, B. Chaboyer, A. Crocker, S. Frank, and B. Macintosh


Now, the question is: is it acceptable that the reporters would pick the nationalistic elements in the story and openly wave the flags of discoverers? In the light of the truly multinational cooperation that has led to the discovery it seems a bit parochial. This is the humanity effort to discover, possibly, other beings in the Universe!

But on second reflection I thought of the positive, role model building side of such national pride attitude. Yes, the Americans have the right to claim success. So have the Poles. And so have the New Zealanders, Koreans and many others, judging by the affiliations of the team members. Science should use any available vehicle to promote rational thinking and scientific attitudes, and the model offered by sports reporters is a good one. We are the champions! Everytime we discover anything!

And for me the most uplifting part of the news is that indeed, some members of the team were genuine AMATEUR SCIENTISTS. This is the flag I would choose to be counted under.

Evolution wars - again

Recently, Florida Department od Education has become a new battl;efront in the war waged by religious groups against Science. The Clay County School Board has voted for the following resolution:

RESOLUTION

Whereas, the Florida Department of Education has drafted and is now proposing new Sunshine State Standards for Science, the Clay County School Board opposes the implementation of the new standards as currently presented.

Whereas, the new Sunshine State Standards for Science no longer present evolution as theory but as “the fundamental concept underlying all of biology and is supported in multiple forms of scientific evidence,” we are requesting that the State Board of Education direct the Florida Department of Education to revise the new Sunshine State Standards for Science so that evolution is not presented as fact.

Whereas, the Clay County School Board recognizes the importance of providing a thorough and comprehensive Science education to all the students in Clay County and to all students in the State of Florida, it recognizes as even more important the need to present these standards through a fair and balanced approach.

NOW THEREFORE, BE IT RESOLVED by the School Board of Clay County, Florida, that the Board urges the State Board of Education to direct the Florida Department of Education to revise the new Sunshine State Standards for Science such that evolution is not presented as fact.

Approved by the School Board of Clay County on the 17th day of January, 2008.


Similar resolution has been passed by Taylor County, differing only by adding a significant phrases extending the meaning of the resolutions beyond mere `biological evolution':

Whereas, the Florida Department of Education has drafted and is now proposing new Sunshine State Standards for Science, the Taylor County School Board opposes the implementation of the new standards as currently presented.

Whereas, the new Sunshine State Standards for Science no longer present evolution as theory but as “the fundamental concept underlying all of biology and is supported in multiple forms of scientific evidence,” we are requesting that the State Board of Education direct the Florida Department of Education to revise/edit the new Sunshine State Standards for Science so that evolution is presented as one of several theories as to how the universe was formed.

Whereas, the Taylor County School Board recognizes the importance of providing a thorough and comprehensive Science education to all the students in Taylor County and to all students in the state of Florida, it recognizes as even more important the need to present these standards through a fair and balanced approach, an approach that does not unfairly exclude other theories as to the creation of the universe.

NOW THEREFORE, BE IT RESOLVED by the Taylor County School Board of Taylor County, Perry, Florida, that the Board urges the State Board of Education to direct the Florida Department of Education to revise the new Sunshine State Standards for Science such that evolution is not presented as fact, but as one of several theories.


Now, aside from rather obvious fact that the School Boards in question do not understand what they are voting about, for example what is a scientific theory and fact, or that evolution has very little to do with origin of the Universe the recent movements seem quite important.

Some of the comments following these resolutions were that Florida will become laughingstock of the US and the world. I believe otherwise. Florida is on the forefront of the battle against secular, rational thinking and will be eventually applauded for its dedication to fight unwanted thinking. I am not joking. The general resurgence of fundamentalist religions everywhere is a phenomenon that has to be taken into account. Just check what is the stance of the UC presidential candidates. Does ANY SINGLE ONE OF THEM clearly and openly support evolution and scientific viewpoint? Can anyone send me a pointer to such statements? Is it that they are afraid of stating it, or that they really do not believe evolution?

The rational efforts of scientists are falling on purposely deaf ears. Our societies want to be blindfolded. And it seems that probably the only way to fight the religious war against rational thinking is to adapt the same measures.

I would vote for the resolutions taken in Florida. And I urge that the doctrines of the Church of the Flying Spaghetti Monster should be taken equally seriously as Christian Intelligent Design proposals and incorporated into school curricula as one of the `several theories explaining the origin of the Universe'. An almost ready to send letter to this effect is available on the WEB page of the Church:


I am writing you with much concern after having read of your hearing to decide whether the alternative theory of Intelligent Design should be taught along with the theory of Evolution. I think we can all agree that it is important for students to hear multiple viewpoints so they can choose for themselves the theory that makes the most sense to them. I am concerned, however, that students will only hear one theory of Intelligent Design.

Let us remember that there are multiple theories of Intelligent Design. I and many others around the world are of the strong belief that the universe was created by a Flying Spaghetti Monster. It was He who created all that we see and all that we feel. We feel strongly that the overwhelming scientific evidence pointing towards evolutionary processes is nothing but a coincidence, put in place by Him.

It is for this reason that I’m writing you today, to formally request that this alternative theory be taught in your schools, along with the other two theories. In fact, I will go so far as to say, if you do not agree to do this, we will be forced to proceed with legal action. I’m sure you see where we are coming from. If the Intelligent Design theory is not based on faith, but instead another scientific theory, as is claimed, then you must also allow our theory to be taught, as it is also based on science, not on faith. [...]


Scientists seem to have to adapt the same discipline and devotion that the religious movements have to protect the sacred grounds of Science against the infidels. To Arms!