A most interesting audience gathered yesterday at the third and now traditional Café Scientifique at the Dark and Light Beer House, organized by the International Science and Technology Centre (ISTC), the InformNauka agency and the Uspekhi Fiziki (Successes of Physics) Foundation, headed by Academician V.L. Ginzburg. Not only science journalists from the most varied publications and astrophysicists, but science-fiction writers, too came to the café. A make up of such an unusual order dictated the far from usual theme for the café: ‘Travel through space and time – a dream or reality?’ It arose because this year, 2005, is World Physics Year, celebrating the 100th anniversary of Einstein’s theory of relativity. In this way the Café Scientifique has made its own modest contribution to the celebration of World Physics Year, which is underway all over the world.
Questions of time and space have occupied the minds of humans for many decades. It was interesting to hear the point of view on this problem both of specialists in astrophysics, quantum mechanics and cosmology, and science-fiction writers who are inspired by science to create works of literature.
Space and time. We are more or less clear on the first, but is it possible to give a precise definition of time? This question was put to the house by co-host of the Café, Liubov Strelnikova. It should be said that the question stumped those present, as no one actually put forward a precise definition. Those present believe that time relates to a number of undefined concepts. Anatoly Mikhailovich Cherepaschuk, Corresponding Member of RAS, Director of the Sternberg State Astronomical Institute defined time as a concept that arose together with matter at the moment when the Universe was born. Alexander Viktorovich Berkov from the Chair of Theoretical Atomic Physics of MEPhI reminded the audience that time is the fourth coordinate and that we live in a four-dimensional world. The humanitarian Alexei Ananchenko from the Ministry of Education and Science believes that time is an abstraction that characterizes the change in an object. And the writer Vadim Kirpichev believes categorically that space and time are nothing but attributes of our thought processes. Finally, many shared the viewpoint that it is impossible to give a precise definition of time; all the processes that are linked with it are too complex, including those in biological objects. So there is no definition but time exists and nothing stops us from discussing and writing about it.
Sergey Komarov | alfa
NASA detects solar flare pulses at Sun and Earth
17.11.2017 | NASA/Goddard Space Flight Center
Pluto's hydrocarbon haze keeps dwarf planet colder than expected
16.11.2017 | University of California - Santa Cruz
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
17.11.2017 | Physics and Astronomy
17.11.2017 | Health and Medicine
17.11.2017 | Studies and Analyses