Julyan Cartwright | |
---|---|
Born | |
Citizenship | British |
Alma mater | University of Newcastle upon Tyne, Queen Mary College, University of London |
Scientific career | |
Fields | dynamical systems, nonlinear science, complexity, pattern formation |
Institutions | CSIC (Spanish National Research Council) |
Doctoral advisor | David Arrowsmith [2] |
Other academic advisors | Ian C. Percival, Keith Runcorn, David Tritton |
Julyan Cartwright is an interdisciplinary physicist working in Granada, Spain at the Andalusian Earth Sciences Institute [3] of the CSIC (Spanish National Research Council) and affiliated with the Carlos I Institute of Theoretical and Computational Physics [4] at the University of Granada.
He is known for his research [5] on how form and pattern emerge in nature, [6] the dynamics of natural systems, [7] across disciplinary boundaries, including his studies of the dynamics of passive scalars in chaotic advection of fluids, [8] [9] bailout embeddings, [10] the Bogdanov map, [11] the influence of fluid mechanics on the development of vertebrate left-right asymmetry, [12] self-organization of biomineralization structures of mollusc shell including mother of pearl (nacre) [13] [14] [15] and cuttlebone, [16] excitable media, [17] and chemobrionics: [18] self-assembling porous precipitate structures, such as chemical gardens, [19] brinicles, [20] and submarine hydrothermal vents. [21]
He is among the researchers in the Stanford list of the World's top 2% most cited scientists. [22] [23] He is chair of the international COST action Chemobionics [24] and chair of the scientific advisory committee to the international conference Dynamics Days Europe. [25] He is editor of the Cambridge University Press journal Elements in Dynamical Systems. [26]
Press interest in his research has highlighted his work on chemical gardens, [27] [28] on pitch perception in the auditory system, [29] [30] on how symmetry is broken so that the heart is on the left, [31] [32] on how bees construct spiral bee combs, [33] [34] [35] on the formation of nacre [36] and pearls, [37] [38] [39] [40] [41] on how brinicle ice tubes grow both on Earth [42] [43] [44] and on Jupiter's moon, Europa, [45] on the information content of complex self-assembled materials [46] [47] [48] [49] on the rogue wave [50] nature of Hokusai's famous artwork the Great Wave off Kanagawa, [51] [52] [53] on the Möbius strip before Möbius, [54] [55] on the possible melting of oceanic methane hydrate deposits owing to climate change, [56] and on the origin of life at alkaline submarine hydrothermal vents [57] and their relevance to astrobiology. [58]
The rotation curve of a disc galaxy is a plot of the orbital speeds of visible stars or gas in that galaxy versus their radial distance from that galaxy's centre. It is typically rendered graphically as a plot, and the data observed from each side of a spiral galaxy are generally asymmetric, so that data from each side are averaged to create the curve. A significant discrepancy exists between the experimental curves observed, and a curve derived by applying gravity theory to the matter observed in a galaxy. Theories involving dark matter are the main postulated solutions to account for the variance.
Nacre, also known as mother of pearl, is an organic–inorganic composite material produced by some molluscs as an inner shell layer. It is also the material of which pearls are composed. It is strong, resilient, and iridescent.
Peter V. Coveney is a Professor of Physical Chemistry, Honorary Professor of Computer Science, and the Director of the Centre for Computational Science (CCS) and Associate Director of the Advanced Research Computing Centre at University College London (UCL). He is also a Professor of Applied High Performance Computing at University of Amsterdam (UvA) and Professor Adjunct at the Yale School of Medicine, Yale University. He is a Fellow of the Royal Academy of Engineering and Member of Academia Europaea. Coveney is active in a broad area of interdisciplinary research including condensed matter physics and chemistry, materials science, as well as life and medical sciences in all of which high performance computing plays a major role. The citation about Coveney on his election as a FREng says: Coveney "has made outstanding contributions across a wide range of scientific and engineering fields, including physics, chemistry, chemical engineering, materials, computer science, high performance computing and biomedicine, much of it harnessing the power of supercomputing to conduct original research at unprecedented space and time scales. He has shown outstanding leadership across these fields, manifested through running multiple initiatives and multi-partner interdisciplinary grants, in the UK, Europe and the US. His achievements at national and international level in advocacy and enablement are exceptional".
In the study of dynamical systems, the van der Pol oscillator is a non-conservative, oscillating system with non-linear damping. It evolves in time according to the second-order differential equation
David Edward Hugh Jones was a British chemist and writer, who under the pen name Daedalus was the fictional inventor for DREADCO. Jones' columns as Daedalus were published for 38 years, starting weekly in 1964 in New Scientist. He then moved to the journal Nature, and continued to publish until 2002. Columns from these magazines, along with additional comments and implementation sketches, were collected in two books: The Inventions of Daedalus: A Compendium of Plausible Schemes (1982) and The Further Inventions of Daedalus (1999).
Helimagnetism is a form of magnetic ordering where spins of neighbouring magnetic moments arrange themselves in a spiral or helical pattern, with a characteristic turn angle of somewhere between 0 and 180 degrees. It results from the competition between ferromagnetic and antiferromagnetic exchange interactions. It is possible to view ferromagnetism and antiferromagnetism as helimagnetic structures with characteristic turn angles of 0 and 180 degrees respectively. Helimagnetic order breaks spatial inversion symmetry, as it can be either left-handed or right-handed in nature.
The molluscshell is typically a calcareous exoskeleton which encloses, supports and protects the soft parts of an animal in the phylum Mollusca, which includes snails, clams, tusk shells, and several other classes. Not all shelled molluscs live in the sea; many live on the land and in freshwater.
Multi-particle collision dynamics (MPC), also known as stochastic rotation dynamics (SRD), is a particle-based mesoscale simulation technique for complex fluids which fully incorporates thermal fluctuations and hydrodynamic interactions. Coupling of embedded particles to the coarse-grained solvent is achieved through molecular dynamics.
Oreste Piro is a dynamical systems theorist and biophysicist. He is at the Universitat de les Illes Balears (UIB) in Palma de Mallorca.
A brinicle is a downward-growing hollow tube of ice enclosing a plume of descending brine that is formed beneath developing sea ice.
Michael Elmhirst Cates is a British physicist. He is the 19th Lucasian Professor of Mathematics at the University of Cambridge and has held this position since 1 July 2015. He was previously Professor of Natural Philosophy at the University of Edinburgh, and has held a Royal Society Research Professorship since 2007.
Sharon C. Glotzer is an American scientist and "digital alchemist", the Anthony C. Lembke Department Chair of Chemical Engineering, the John Werner Cahn Distinguished University Professor of Engineering and the Stuart W. Churchill Collegiate Professor of Chemical Engineering at the University of Michigan, where she is also professor of materials science and engineering, professor of physics, professor of macromolecular science and engineering, and professor of applied physics. She is recognized for her contributions to the fields of soft matter and computational science, most notably on problems in assembly science and engineering, nanoscience, and the glass transition, for which the elucidation of the nature of dynamical heterogeneity in glassy liquids is of particular significance. She is a member of the National Academy of Sciences, the National Academy of Engineering, and the American Academy of Arts and Sciences.
In condensed matter physics, a time crystal is a quantum system of particles whose lowest-energy state is one in which the particles are in repetitive motion. The system cannot lose energy to the environment and come to rest because it is already in its quantum ground state. Because of this, the motion of the particles does not really represent kinetic energy like other motion; it has "motion without energy". Time crystals were first proposed theoretically by Frank Wilczek in 2012 as a time-based analogue to common crystals – whereas the atoms in crystals are arranged periodically in space, the atoms in a time crystal are arranged periodically in both space and time. Several different groups have demonstrated matter with stable periodic evolution in systems that are periodically driven. In terms of practical use, time crystals may one day be used as quantum computer memory.
In fluid dynamics, the Frenkel line is a proposed boundary on the phase diagram of a supercritical fluid, separating regions of qualitatively different behavior. Fluids on opposite sides of the line have been described as "liquidlike" or "gaslike", and exhibit different behaviors in terms of oscillation, excitation modes, and diffusion.
Dwight Barkley is a professor of mathematics at the University of Warwick.
Raymond Ethan Goldstein FRS FInstP is Schlumberger Professor of Complex Physical Systems in the Department of Applied Mathematics and Theoretical Physics (DAMTP) at the University of Cambridge and a Fellow of Churchill College, Cambridge.
Collective motion is defined as the spontaneous emergence of ordered movement in a system consisting of many self-propelled agents. It can be observed in everyday life, for example in flocks of birds, schools of fish, herds of animals and also in crowds and car traffic. It also appears at the microscopic level: in colonies of bacteria, motility assays and artificial self-propelled particles. The scientific community is trying to understand the universality of this phenomenon. In particular it is intensively investigated in statistical physics and in the field of active matter. Experiments on animals, biological and synthesized self-propelled particles, simulations and theories are conducted in parallel to study these phenomena. One of the most famous models that describes such behavior is the Vicsek model introduced by Tamás Vicsek et al. in 1995.
An active fluid is a densely packed soft material whose constituent elements can self-propel. Examples include dense suspensions of bacteria, microtubule networks or artificial swimmers. These materials come under the broad category of active matter and differ significantly in properties when compared to passive fluids, which can be described using Navier-Stokes equation. Even though systems describable as active fluids have been observed and investigated in different contexts for a long time, scientific interest in properties directly related to the activity has emerged only in the past two decades. These materials have been shown to exhibit a variety of different phases ranging from well ordered patterns to chaotic states. Recent experimental investigations have suggested that the various dynamical phases exhibited by active fluids may have important technological applications.
In the theory of dynamical systems, a bailout embedding is a system defined as
Turbulent phenomena are observed universally in energetic fluid dynamics, associated with highly chaotic fluid motion involving excitations spread over a wide range of length scales. The particular features of turbulence are dependent on the fluid and geometry, and specifics of forcing and dissipation.
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