Structures made out of building blocks can shift their shape and autonomously self-organize to a new configuration. The physicists Saeed Osat and Ramin Golestanian from the Max Planck Institute for Dynamics and Self-Organization (MPI-DS) revealed this mechanism which may be used to actively manipulate molecular organization. A seed of the novel desired configuration is sufficient to trigger reorganization.
This principle can be applied on to biological building blocks which are constantly recycled to form new structures in living systems.
The concept of remodeling is familiar to most people: those who have ever played with Lego bricks know that many combinations and structures possible from the same components.
Building a wind power operation that can thrive in icy conditions requires a keen understanding of the underlying physics.
Winter is supposed to be the best season for wind power — the winds are more potent, and since air density increases as the temperature drops, more force is pushing on the blades. But winter also comes with a problem: freezing weather.
Frequent severe icing can cut a wind farm’s annual energy production by over 20 percent, costing the industry hundreds of millions.
Piola666/iStock.
Even light icing can produce enough surface roughness on wind turbine blades to reduce their aerodynamic efficiency, which reduces the amount of power they can produce, as Texas experienced in February.
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Space Engine is available for free here: http://spaceengine.org. Enjoy and please subscribe.
How could we one day travel between the stars with real physics? Perhaps the greatest challenge to interstellar flight is energetics — it takes vast amounts of energy to accelerate even small ships to 20% the speed of light. But what if we could steal that energy from where? Perhaps even a black hole. Enter the “halo drive”, a video by Prof David Kipping based on his new peer-reviewed research paper on the subject.
This video is based on research conducted at the Cool Worlds Lab at Columbia University, New York. You can now support our research program directly here: https://www.coolworldslab.com/support.
There’s an error in the video at around 8:30, 2 trillion joules is the cumulative energy output of a typical nuclear power station after 2000 seconds, not 20 days.
Researchers at the Lawrence Livermore National Laboratory claim to have achieved the seemingly impossible: generate more energy with a fusion reaction than they put into it, potentially paving the way for a truly environmentally friendly and safe source of power.
Their experiment, which involved using the “world’s largest and highest energy laser system” at Livermore’s National Ignition Facility to blast light at small capsules of deuterium-tritium fuel, generated 20 percent more energy than the amount required to power the system.
Despite the modest energy output — the system generated enough power to boil around two to three kettles — the researchers are boldly predicting that it could represent a major turning point in the quest to turn fusion energy into a reality.
Backwards through time? We travel forwards every day, but traveling back could let us change our past, visit old friends, or manipulate the timeline to our benefit… Although our knowledge of space and time remains incomplete, we can still use what we know to consider possible time machines. But what kind of paradoxes would this entail and how can we resolve them? Join us today on a special journey through time.
An educational video written and presented by Professor David Kipping.
This video is based on research conducted at the Cool Worlds Lab at Columbia University, New York. You can now support our research program directly here: https://www.coolworldslab.com/support.
Further reading and resources: ► Echeverria, F., Klinkhammer, G. & Thorne, K. S. (1991), “Billiard balls in wormhole spacetimes with closed timelike curves: Classical theory”, Phys. Rev. D., 44, 1077: https://ui.adsabs.harvard.edu/abs/1991PhRvD…44.1077E/abstract. ► S. Kalyana Rama & Siddhartha Sen (1994), “Inconsistent Physics in the Presence of Time Machines”: https://arxiv.org/abs/gr-qc/9410031v1 ► Stephen Hawking (1992), “Chronology protection conjecture”, Phys. Rev. D., 46603: https://ui.adsabs.harvard.edu/abs/1992PhRvD…46…603H/abstract. ► Max Tegmark (1997), “On the dimensionality of space time”, CQG, 14, L69: https://arxiv.org/abs/gr-qc/9702052
A hidden mechanism for achieving glides of hundreds of feet is revealed by computational modelling.
Scientists are currently thinking of ways to create robots resembling the gliding motion of flying snakes, according to a study published today (Dec .13) in Physics of Fluids.
‘Undulations’ encourage lift.
KaraGrubis/iStock.
The researchers anticipate their findings will improve our comprehension of gliding motion and result in a more effective design for future airborne snake robots.
“I wouldn’t want to be on the team figuring out how to build a Jupiter-sized spacecraft, but the odds aren’t zero.”
A team of scientists believes we may be able to detect alien spacecraft flying through distant solar systems using the Laser Interferometer Gravitational-Wave Observatory (LIGO) in the US.
Though the scientists from Applied Physics, a research institute in New York, concede that gravitational wave (GW) detection is “in its infancy”, they also say it is “a sophisticated science” that could be used to “detect extra-terrestrial mega-technology,” in a paper available in pre-print server arXiv.
Fusion Energy For All Humanity — Prof Dr. Tony Donné Ph.D. — Program Manager (CEO), EUROfusion
Prof. Dr. Tony Donne, Ph.D. is Program Manager (CEO) of the EUROfusion (https://www.euro-fusion.org/) research consortium, a European consortium of 30 national fusion research institutes, in 26 EU countries, plus Switzerland and Ukraine, where he coordinates the work of over 4,000 scientists and engineers.
Dr. Donne trained as a physicist, obtaining his Masters in Experimental Physics at Utrecht University, his Ph.D. degree at the Free University of Amsterdam for work in the field of nuclear physics, and moved into fusion research right afterwards and has devoted a substantial part of his scientific career to the design and use of plasma diagnostics in a large range of fusion devices.
Prior to EUROfusion, Dr. Donne was head of the Fusion Physics Division at the Dutch Institute for Fundamental Energy Research (DIFFER) and responsible for the coordination of the nuclear fusion research in the Netherlands, where he coordinated Dutch fusion research as Director of fusion science and Acting Director.
Dr. Donne has also served as Professor in Diagnostics and Heating of Fusion Plasmas at Eindhoven University of Technology, Director of the Dutch-Russian Centre of Excellence on Fusion Physics and Technology, as well as Program Director of the ITER (International Thermonuclear Experimental Reactor)-Netherlands consortium, and chair of the Coordination Committee of the International Tokamak Physics Activity under the auspices of the ITER project.
Life is really weird. From the vantage point of a physicist, it is even stranger. Life is unlike any other phenomenon in physics. Stars, electrons, and black holes are all amazing in their own ways. But only life invents, and the first thing life invents is itself.
Life is creative in a way that no other physical system can be, and its unique use of information may be the key to understanding what makes it different from other physical systems. Now, thanks to a new grant my colleagues and I have received from the Templeton Foundation, we are going to be exploring exactly how information allows life to work its magic. I’m very excited about the project, and this essay is my first report from the frontier as we plunge into terra incognita.
