In our third online poll to find out what Plus readers would most like to know about the Universe, you told us that you'd like to learn about the secrets of dark matter and dark energy. We took the second part of the question — what is dark matter? — to John D. Barrow, renowned cosmologist and Professor of
Mathematical Sciences at the University of Cambridge. Here is his answer. (The first part of the question has been answered in Plus by Martin Rees.)
In my view, as the old stars die new will be born at all times whether or not the universe is expanding. The total matter in the universe must remain the same at all times and this includes dark energy and dark matter. Dark matter and dark energy could be transforming simultaneously into one another constantly maintaining the same dynamic ratio of dark matter to dark energy.
In my view, even the expanding universe, the fading away of old stars will result in the creation of new stars and therefore new galaxies. So there will NEVER be the so-called death of the universe whether or not the universe is expanding, contracting or static.
The numbers of students taking AS and A level Mathematics and Further Mathematics qualifications have increased very significantly this year. A level Mathematics numbers are up from 64593 to 72475, a 12% increase, while A level Further Mathematics numbers are up from 9091 to 10473, a 15% increase. The Further Mathematics increases are the highest of any mainstream A level subject.
There appear to be much larger increases at AS level, with AS Mathematics numbers up from 84613 to 103312, a 22% increase, and AS Further Mathematics numbers up from 8945 to 13164, a 47% increase. However, it is not entirely certain that these figures can be taken at face value, due to changes in the advice regarding when candidates should apply for certification.
The results come at a time when A-level mathematics has been widely discussed in the news, with controversy over plans to introduce a new A-level in Use of Mathematics as well as calls to award more school league table points for "harder" subjects such as mathematics and physics.
Chris Budd, Education Secretary at the London Mathematical Society said, "We have been concerned at the recent decline in the number of candidates taking A-level mathematics and are now delighted that the subject is again attracting healthy levels of interest. Many of these candidates will go on to study mathematically-rich subjects at university, but many
others will find their mathematics useful whatever they go on to study or in their working lives. " Duncan Lawson of the Higher Education Service Area at the Institute of Mathematics and Its Applications said, "The continued growth in success at A-level mathematics is fantastic news for the future of the subject in the UK. It is also good news for the country
as a mathematically well-qualified workforce is essential for our international economic competitiveness. "
The news has also been welcomed by other organisations concerned with maths education in schools, including the Advisory Committee on Mathematics Education (ACME), the National Centre for Excellence in the Teaching of Mathematics (NCETM), and the Engineering Council UK. Particular
praise has been heaped on the Further Mathematics Network (now replaced and extended by the Further Mathematics Support Programme), which for the last four years has provided tuition to students who could not access Further Mathematics tuition in their own schools and colleges. "The strong growth in numbers taking both these subjects is a tribute to
the work of the Further Mathematics Network and others who are working to increase the popularity of Mathematics," said John Holman, Director of the National Science Learning Centre and National STEM Director.
The Further Mathematics Network was launched four years ago, because many students had been missing out on the opportunity to take Further Maths at A level. This was worrying, since a high level of mathematics is a pre-requisite for many degree subjects. "Further Mathematics is widely recognised by university departments in the sciences, engineering, computing and mathematics, the so called
'STEM' subjects, as one of the most demanding and useful AS/A level subjects," said Charlie Stripp, Programme Leader of the Further Mathematics Support Programme. "These increased numbers will result in more students being well-prepared to make the transition to university in these vital subject areas. Taking Further Maths is a great way for students to show they have that something extra."
Fifty years ago, C.P. Snow claimed there were 'two cultures', sciences and the humanities, with an unbridgeable gulf between them.The idea sparked widespread controversy, which has continued ever since.
This debate will be revisited in the event Culture clash: The 'two cultures' 50 years on, part of the British Science Festival at the University of Surrey (Guildford). The speakers, Prof Robert Bud from the Science Museum, Dr Red Nield, editor of
Geoscientist magazine, and Prof Raymond Tallis from the University of Manchester, will take a critical look at Snow's notorious idea and its enduring appeal. Have the two cultures moved any closer? And what do they imply for the larger questions he raised about education, economic
development, and global inequality?
In our third online poll to find out what Plus readers would most like to know about the Universe, you told us that you'd like to learn about the secrets of dark matter and dark energy. We took the first part of the question — what is dark matter? — to Martin Rees,
Astronomer Royal and Professor of Cosmology and Astrophysics at the University of Cambridge. Here is his answer.
Teoría Conectada: The best physics theory since 1687
The new Copernican revolution
I read Lee Smolin's book ‘Las dudas de la física en el siglo XXI’, 2007, Ed. Crítica. Wonderful. I have seen that Lee Smolin are looking for a new big idea, the fundamental simply idea for the progress and unification of physics. Seems that Smolin got the conviction that both quantum mechanics and GR theorys don’t understand the deep nature of time (page 355). It is right for GR unless.
Here is what i say:
No more Lorentz’s Transformations. The new alternatives transformations (’relational transformations’) are deduced on ‘LA PARADOJA DE LOS GEMELOS DE LA TEORÍA DE LA RELATIVIDAD ESPECIAL DE EINSTEIN’, f.i., equations (22) and (23) with “C” and “D” given by (42) and (43) , pages (33) to (36). From them arises the ‘teoría relacional’, an alternative to special relativity.
The generalitation of this ‘teoría relacional’, the unique possible classic alternative to GR, appears on ‘EXTRACTO DE LA TEORÍA CONECTADA'. 3 are the fundamental equations. (84), (171) and (172), pages (146) and (182). This 3=24 equations are necessary in order to eliminate the Newton-Einstein’s absolute space. There are not absolutes accelerations (neither absolutes velocities, of
The DARK MATTER problem is solved in ‘Apéncice C’, page 205 (Exponential factor gets important at large distance from the center).
What about a “quantum teoría conectada”? I believe that you can say something important about it.
Terrassa 2009 august 6
P.D.: Smolin IS completely certain when he tell that the great historic mistake comes from Descartes-Galileo ('Las dudas de la física en el s.XXI', pages 355-356). This great historic error is the Principle of Inertia (movement is a relational concept. It is completely false that the movement of ALL free bodies is a straight line. Some of them move, respect the SAME reference system, in a curved
way. Spacetime metric defines a specific relationship betwen bodies and reference system.Pure evidence beyond the reason: at night, see the stars). Also, Principle of Inertia leads us to the inertial-non inertial dichotomy. Where is INVARIANCE of physical laws? (pages 45 on 'Paradoja' and 141, eq. (77), on 'Teoría Conectada').
A. From "Experiment detects particles of dark matter, maybe"
Events in underground experiment too few for certainty, but match the signature of WIMPs.
- "...dark matter — the proposed invisible material believed to account for about 80 percent of the mass of the universe."
- "...tiny vibrations imparted by a proposed type of dark matter called weakly interacting massive particles, or WIMPs."
- "proof of dark matter, Hogan says, would be a huge transformation in how we do science; we would have a new form of matter to study."
- "WIMP fingerprints might be detected by a slew of experiments on the ground and in space including collisions of high-energy protons at the world’s most powerful atom smasher, the Large Hadron Collider near Geneva. Physicists using the LHC, which has now resumed operation after a year of repairs, plan to look for what would be missing: a deficit of energy in the collision debris could be
evidence for dark matter particles."
B. Respectfully and tired of, I refrain from more quotes and just suggest searching "Dov Henis there is no dark matter nor dark energy"
Enough is enough. Humanity has been hallucinating about dark energy and matter for circa 100 years.
As discussed in our recent article Lambda marks the spot — the biggest problem in theoretical physics, dark energy and the cosmological constant remains a controversial area that lies at the very edges of our understanding of the Universe. One of the contributors to that article, Subir Sarkar from the University of Oxford, recently took part in the Big Questions debate series at Imperial College in London, debating the fate of the Universe with Andrew Jaffe from Imperial. Jaffe argued for the existence of dark
energy, while Subir argued that it was an artifact of the oversimplified cosmological model used to interpret observations. At the end of the debate, the audience was asked to vote on whether they thought dark energy exists, and Subir told us: "Given that I was attacking the standard cosmological model, it was a pleasant surprise when the audience voted decisively in my favour!"
Plus readers, always seeking an informed debate, voted to ask the experts "What is dark energy and dark matter?" in our last IYA09 poll. We'll be recording the answer to that question soon, so stay tuned. And once everyone has had a chance to hear both sides of the argument we'll open the debate on the Plus blog by asking you to vote on
whether you think dark energy exists. Will Sarkar win the argument again? We'll have to wait and see..
Labelling something you know almost nothing about always struck me as unhelpful and overly possessive-
man- "how does the mind work?"
scientist- "well it works by using sausageBaffle"
man- "what is sausageBaffle?"
scientist- "we don't know yet, but sausageBaffle is certainly the reason".
It's not very often that something I read makes me want to jack in my lovely job at Plus and return to study and research. But that is just what happened when reading "Sync" by Steven Strogatz.
The book tells the story of how questions from diverse areas — Why do we sleep when we do? How do fireflies flash in unision? Why does our heart beat? How do you link generators in a power grid? — have developed into a new field of study. This new field, which Strogatz calls synchrony, examines how order can spontaneously break out in complex systems. The role of sync in such diverse areas of science is fascinating, but equally fascinating is his evocative description of the process of doing this research. Strogatz describes theoretical concepts and research problems almost as if they were physical entities that you could touch or smell.