TY - INPR A1 - Witt, Annette A1 - Kurths, Jürgen A1 - Krause, F. A1 - Fischer, K. T1 - On the validity of a model for the reversals of the Earth‘s magnetic field N2 - We have used techniques of nonlinear dynamics to compare a special model for the reversals of the Earth's magnetic field with the observational data. Although this model is rather simple, there is no essential difference to the data by means of well-known characteristics, such as correlation function and probability distribution. Applying methods of symbolic dynamics we have found that the considered model is not able to describe the dynamical properties of the observed process. These significant differences are expressed by algorithmic complexity and Renyi information. T3 - NLD Preprints - 4 Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13460 ER - TY - INPR A1 - Kurths, Jürgen A1 - Voss, A. A1 - Witt, Annette A1 - Saparin, P. A1 - Kleiner, H. J. A1 - Wessel, Niels T1 - Quantitative analysis of heart rate variability N2 - In the modern industrialized countries every year several hundred thousands of people die due to the sudden cardiac death. The individual risk for this sudden cardiac death cannot be defined precisely by common available, non-invasive diagnostic tools like Holter-monitoring, highly amplified ECG and traditional linear analysis of heart rate variability (HRV). Therefore, we apply some rather unconventional methods of nonlinear dynamics to analyse the HRV. Especially, some complexity measures that are basing on symbolic dynamics as well as a new measure, the renormalized entropy, detect some abnormalities in the HRV of several patients who have been classified in the low risk group by traditional methods. A combination of these complexity measures with the parameters in the frequency domain seems to be a promising way to get a more precise definition of the individual risk. These findings have to be validated by a representative number of patients. T3 - NLD Preprints - 5 Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13470 ER - TY - INPR A1 - Thiessenhusen, Kai-Uwe A1 - Esposito, Larry W. A1 - Kurths, Jürgen A1 - Spahn, Frank T1 - Detection of hidden resonances in Saturn's B-ring N2 - The Voyager 2 Photopolarimeter experiment has yielded the highest resolved data of Saturn's rings, exhibiting a wide variety of features. The B-ring region between 105000 km and 110000 km distance from Saturn has been investigated. It has a high matter density and contains no significance features visible by eye. Analysis with statistical methods has let us to the detection of two significant events. These features are correlated with the inner 3:2 resonances of the F-ring shepherd satellites Pandora and Prometheus, and may be evidence of large ring paricles caught in the corotation resonances. T3 - NLD Preprints - 13 KW - Planetary Rings Y1 - 1995 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13618 ER - TY - INPR A1 - Schmidtmann, Olaf T1 - Modelling of the interaction of lower and higher modes in two-dimensional MHD-equations N2 - The present paper is related to the problem of approximating the exact solution to the magnetohydrodynamic equations (MHD). The behaviour of a viscous, incompressible and resistive fluid is exemined for a long period of time. Contents: 1 The magnetohydrodynamic equations 2 Notations and precise functional setting of the problem 3 Existence, uniqueness and regularity results 4 Statement and Proof of the main theorem 5 The approximate inertial manifold 6 Summary T3 - NLD Preprints - 17 KW - MHD-equations KW - approximate inertial manifolds Y1 - 1995 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13790 ER - TY - INPR A1 - Dicken, Volker A1 - Maaß, Peter T1 - Wavelet-Galerkin methods for ill-posed problems N2 - Projection methods based on wavelet functions combine optimal convergence rates with algorithmic efficiency. The proofs in this paper utilize the approximation properties of wavelets and results from the general theory of regularization methods. Moreover, adaptive strategies can be incorporated still leading to optimal convergence rates for the resulting algorithms. The so-called wavelet-vaguelette decompositions enable the realization of especially fast algorithms for certain operators. T3 - NLD Preprints - 22 Y1 - 1995 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13890 ER - TY - INPR A1 - Scherf, Ullrich A1 - Tian, He T1 - Organic electronics/optics for an energetic life T2 - Advanced materials Y1 - 2012 U6 - https://doi.org/10.1002/adma.201104917 SN - 0935-9648 VL - 24 IS - 5 SP - 576 EP - 579 PB - Wiley-Blackwell CY - Malden ER - TY - INPR A1 - Feudel, Fred A1 - Seehafer, Norbert A1 - Schmidtmann, Olaf T1 - Bifurcation phenomena of the magnetofluid equations N2 - We report on bifurcation studies for the incompressible magnetohydrodynamic equations in three space dimensions with periodic boundary conditions and a temporally constant external forcing. Fourier reprsentations of velocity, pressure and magnetic field have been used to transform the original partial differential equations into systems of ordinary differential equations (ODE), to which then special numerical methods for the qualitative analysis of systems of ODE have been applied, supplemented by the simulative calculation of solutions for selected initial conditions. In a part of the calculations, in order to reduce the number of modes to be retained, the concept of approximate inertial manifolds has been applied. For varying (incereasing from zero) strength of the imposed forcing, or varying Reynolds number, respectively, time-asymptotic states, notably stable stationary solutions, have been traced. A primary non-magnetic steady state loses, in a Hopf bifurcation, stability to a periodic state with a non-vanishing magnetic field, showing the appearance of a generic dynamo effect. From now on the magnetic field is present for all values of the forcing. The Hopf bifurcation is followed by furhter, symmetry-breaking, bifurcations, leading finally to chaos. We pay particular attention to kinetic and magnetic helicities. The dynamo effect is observed only if the forcing is chosen such that a mean kinetic helicity is generated; otherwise the magnetic field diffuses away, and the time-asymptotic states are non-magnetic, in accordance with traditional kinematic dynamo theory. T3 - NLD Preprints - 9 Y1 - 1995 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13585 ER - TY - INPR A1 - Feudel, Fred A1 - Seehafer, Norbert T1 - Bifurcations and pattern formation in a 2D Navier-Stokes fluid N2 - We report on bifurcation studies for the incompressible Navier-Stokes equations in two space dimensions with periodic boundary conditions and an external forcing of the Kolmogorov type. Fourier representations of velocity and pressure have been used to approximate the original partial differential equations by a finite-dimensional system of ordinary differential equations, which then has been studied by means of bifurcation-analysis techniques. A special route into chaos observed for increasing Reynolds number or strength of the imposed forcing is described. It includes several steady states, traveling waves, modulated traveling waves, periodic and torus solutions, as well as a period-doubling cascade for a torus solution. Lyapunov exponents and Kaplan-Yorke dimensions have been calculated to characterize the chaotic branch. While studying the dynamics of the system in Fourier space, we also have transformed solutions to real space and examined the relation between the different bifurcations in Fourier space and toplogical changes of the streamline portrait. In particular, the time-dependent solutions, such as, e.g., traveling waves, torus, and chaotic solutions, have been characterized by the associated fluid-particle motion (Lagrangian dynamics). T3 - NLD Preprints - 23 Y1 - 1995 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13907 ER - TY - INPR A1 - Feudel, Fred A1 - Seehafer, Norbert T1 - On the bifurcation phenomena in truncations of the 2D Navier-Stokes equations N2 - We have studied bifurcation phenomena for the incompressable Navier-Stokes equations in two space dimensions with periodic boundary conditions. Fourier representations of velocity and pressure have been used to transform the original partial differential equations into systems of ordinary differential equations (ODE), to which then numerical methods for the qualitative analysis of systems of ODE have been applied, supplemented by the simulative calculation of solutions for selected initial conditions. Invariant sets, notably steady states, have been traced for varying Reynolds number or strength of the imposed forcing, respectively. A complete bifurcation sequence leading to chaos is described in detail, including the calculation of the Lyapunov exponents that characterize the resulting chaotic branch in the bifurcation diagram. T3 - NLD Preprints - 1 Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13390 ER - TY - INPR A1 - Feudel, Fred A1 - Seehafer, Norbert A1 - Schmidtmann, Olaf T1 - Fluid helicity and dynamo bifurcations N2 - The bifurcation behaviour of the 3D magnetohydrodynamic equations has been studied for external forcings of varying degree of helicity. With increasing strength of the forcing a primary non-magnetic steady state loses stability to a magnetic periodic state if the helicity exceeds a threshold value and to different non-magnetic states otherwise. T3 - NLD Preprints - 18 Y1 - 1995 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13882 ER - TY - INPR A1 - Seehafer, Norbert T1 - Nature of the α effect in magnetohydrodynamics N2 - It is shown that the ff effect of mean-field magnetohydrodynamics, which consists in the generation of a mean electromotive force along the mean magnetic field by turbulently fluctuating parts of velocity and magnetic field, is equivalent to the simultaneous generation of both turbulent and mean-field magnetic helicities, the generation rates being equal in magnitude and opposite in sign. In the particular case of statistically stationary and homogeneous fluctuations this implies that the ff effect can increase the energy in the mean magnetic field only under the condition that also magnetic helicity is accumulated there. T3 - NLD Preprints - 25 Y1 - 1995 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13919 ER - TY - INPR A1 - Demircan, Ayhan A1 - Scheel, Stefan A1 - Seehafer, Norbert T1 - Heteroclinic behavior in rotating Rayleigh-Bénard convection N2 - We investigate numerically the appearance of heteroclinic behavior in a three-dimensional, buoyancy-driven fluid layer with stress-free top and bottom boundaries, a square horizontal periodicity with a small aspect ratio, and rotation at low to moderate rates about a vertical axis. The Prandtl number is 6.8. If the rotation is not too slow, the skewed-varicose instability leads from stationary rolls to a stationary mixed-mode solution, which in turn loses stability to a heteroclinic cycle formed by unstable roll states and connections between them. The unstable eigenvectors of these roll states are also of the skewed-varicose or mixed-mode type and in some parameter regions skewed-varicose like shearing oscillations as well as square patterns are involved in the cycle. Always present weak noise leads to irregular horizontal translations of the convection pattern and makes the dynamics chaotic, which is verified by calculating Lyapunov exponents. In the nonrotating case, the primary rolls lose, depending on the aspect ratio, stability to traveling waves or a stationary square pattern. We also study the symmetries of the solutions at the intermittent fixed points in the heteroclinic cycle. T3 - NLD Preprints - 55 Y1 - 1999 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-14914 ER - TY - INPR A1 - Schumacher, Jörg A1 - Seehafer, Norbert T1 - Bifurcation analysis of the plane sheet pinch N2 - A numerical bifurcation analysis of the electrically driven plane sheet pinch is presented. The electrical conductivity varies across the sheet such as to allow instability of the quiescent basic state at some critical Hartmann number. The most unstable perturbation is the two-dimensional tearing mode. Restricting the whole problem to two spatial dimensions, this mode is followed up to a time-asymptotic steady state, which proves to be sensitive to three-dimensional perturbations even close to the point where the primary instability sets in. A comprehensive three-dimensional stability analysis of the two-dimensional steady tearing-mode state is performed by varying parameters of the sheet pinch. The instability with respect to three-dimensional perturbations is suppressed by a sufficiently strong magnetic field in the invariant direction of the equilibrium. For a special choice of the system parameters, the unstably perturbed state is followed up in its nonlinear evolution and is found to approach a three-dimensional steady state. T3 - NLD Preprints - 56 Y1 - 1999 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-14926 ER - TY - INPR A1 - Guasti, Giovanna A1 - Engbert, Ralf A1 - Krampe, Ralf T. A1 - Kurths, Jürgen T1 - Phase transitions, complexity, and stationarity in the production of polyrhythms N2 - Contents: 1 Introduction 2 Experiment 3 Data 4 Symbolic dynamics 4.1 Symbolic dynamics as a tool for data analysis 4.2 2-symbols coding 4.3 3-symbols coding 5 Measures of complexity 5.1 Word statistics 5.2 Shannon entropy 6 Testing for stationarity 6.1 Stationarity 6.2 Time series of cycle durations 6.3 Chi-square test 7 Control parameters in the production of rhythms 8 Analysis of relative phases 9 Discussion 10 Outlook T3 - NLD Preprints - 57 Y1 - 2000 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-14933 ER - TY - INPR A1 - Henkel, Carsten A1 - Pieplow, Gregor T1 - Reply to Comment on 'Fully covariant radiation force on a polarizable particle' T2 - New journal of physics : the open-access journal for physics N2 - We argue that the theories of Volokitin and Persson (2014 New J. Phys. 16 118001), Dedkov and Kyasov (2008 J. Phys.: Condens. Matter 20 354006), and Pieplow and Henkel (2013 New J. Phys. 15 023027) agree on the electromagnetic force on a small, polarizable particle that is moving parallel to a planar, macroscopic body, as far as the contribution of evanescent waves is concerned. The apparent differences are discussed in detail and explained by choices of units and integral transformations. We point out in particular the role of the Lorentz contraction in the procedure used by Volokitin and Persson, where a macroscopic body is 'diluted' to obtain the force on a small particle. Differences that appear in the contribution of propagating photons are briefly mentioned. KW - applied classical electromagnetism KW - fluctuation phenomena KW - random processes KW - noise KW - Brownian motion KW - mechanical effects of light Y1 - 2014 U6 - https://doi.org/10.1088/1367-2630/16/11/118002 SN - 1367-2630 VL - 16 PB - IOP Publ. Ltd. CY - Bristol ER - TY - INPR A1 - Bürger, Gerd T1 - Comment on "Bias correction, quantile mapping, and downscaling: revisiting the inflation issue" T2 - Journal of climate N2 - In a recent paper, Maraun describes the adverse effects of quantile mapping on downscaling. He argues that when large-scale GCM variables are rescaled directly to small-scale fields or even station data, genuine small-scale covariability is lost and replaced by uniform variability inherited from the larger scales. This leads to a misrepresentation mainly of areal means and long-term trends. This comment acknowledges the former point, although the argument is relatively old, but disagrees with the latter, showing that grid-size long-term trends can be different from local trends. Finally, because it is partly incorrectly addressed, some clarification is added regarding the inflation issue, stressing that neither randomization nor inflation is free of unverified assumptions. KW - Climate change KW - Statistics KW - Climate variability Y1 - 2014 U6 - https://doi.org/10.1175/JCLI-D-13-00184.1 SN - 0894-8755 SN - 1520-0442 VL - 27 IS - 4 SP - 1819 EP - 1820 PB - American Meteorological Soc. CY - Boston ER - TY - INPR A1 - Föhlisch, Alexander A1 - de Groot, F. M. F. A1 - Odelius, Michael A1 - Techert, Simone A1 - Wernet, P. T1 - Comment on "state-dependent electron delocalization dynamics at the solute-solvent interface: soft-x-ray absorption spectroscopy and lambda b initio calculations" T2 - Physical review letters Y1 - 2014 U6 - https://doi.org/10.1103/PhysRevLett.112.129302 SN - 0031-9007 SN - 1079-7114 VL - 112 IS - 12 PB - American Physical Society CY - College Park ER - TY - INPR A1 - Pikovskij, Arkadij A1 - Zaks, Michael A. A1 - Feudel, Ulrike A1 - Kurths, Jürgen T1 - Singular continuous spectra in dissipative dynamics N2 - We demonstrate the occurrence of regimes with singular continuous (fractal) Fourier spectra in autonomous dissipative dynamical systems. The particular example in an ODE system at the accumulation points of bifurcation sequences associated to the creation of complicated homoclinic orbits. Two different machanisms responsible for the appearance of such spectra are proposed. In the first case when the geometry of the attractor is symbolically represented by the Thue-Morse sequence, both the continuous-time process and its descrete Poincaré map have singular power spectra. The other mechanism owes to the logarithmic divergence of the first return times near the saddle point; here the Poincaré map possesses the discrete spectrum, while the continuous-time process displays the singular one. A method is presented for computing the multifractal characteristics of the singular continuous spectra with the help of the usual Fourier analysis technique. T3 - NLD Preprints - 15 Y1 - 1995 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13787 ER - TY - INPR A1 - Pikovskij, Arkadij A1 - Feudel, Ulrike T1 - Characterizing strange nonchaotic attractors N2 - Strange nonchaotic attractors typically appear in quasiperiodically driven nonlinear systems. Two methods of their characterization are proposed. The first one is based on the bifurcation analysis of the systems, resulting from periodic approximations of the quasiperiodic forcing. Secondly, we propose th characterize their strangeness by calculating a phase sensitivity exponent, that measures the sensitivity with respect to changes of the phase of the external force. It is shown, that phase sensitivity appears if there is a non-zero probability for positive local Lyapunov exponents to occur. T3 - NLD Preprints - 2 Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13405 ER - TY - INPR A1 - Pikovskij, Arkadij T1 - Comment on "Asymptotic Phase for Stochastic Oscillators" T2 - Physical review letters Y1 - 2015 U6 - https://doi.org/10.1103/PhysRevLett.115.069401 SN - 0031-9007 SN - 1079-7114 VL - 115 IS - 6 PB - American Physical Society CY - College Park ER - TY - INPR A1 - Kurths, Jürgen A1 - Pikovskij, Arkadij A1 - Scheffczyk, Christian T1 - Roughening interfaces in deterministic dynamics N2 - Two deterministic processes leading to roughening interfaces are considered. It is shown that the dynamics of linear perturbations of turbulent regimes in coupled map lattices is governed by a discrete version of the Kardar-Parisi-Zhang equation. The asymptotic scaling behavior of the perturbation field is investigated in the case of large lattices. Secondly, the dynamics of an order-disorder interface is modelled with a simple two-dimensional coupled map lattice, possesing a turbulent and a laminar state. It is demonstrated, that in some range of parameters the spreading of the turbulent state is accompanied by kinetic roughening of the interface. T3 - NLD Preprints - 3 Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13447 ER - TY - INPR A1 - Hilczer, Börn A1 - Gerhard, Reimund A1 - Scott, James F. T1 - Special Issue of Ferroelectrics in Honor of S. B. Lang T2 - Ferroelectrics Y1 - 2014 U6 - https://doi.org/10.1080/00150193.2014.964099 SN - 0015-0193 SN - 1563-5112 VL - 472 IS - 1 SP - VII EP - VIII PB - Routledge, Taylor & Francis Group CY - Abingdon ER - TY - INPR A1 - Gerhard, Reimund T1 - Sidney Lang - his collaboration with the University of Potsdam T2 - Ferroelectrics Y1 - 2014 U6 - https://doi.org/10.1080/00150193.2014.967090 SN - 0015-0193 SN - 1563-5112 VL - 472 IS - 1 SP - 5 EP - 5 PB - Routledge, Taylor & Francis Group CY - Abingdon ER - TY - INPR A1 - Acharya, B. S. A1 - Actis, M. A1 - Aghajani, T. A1 - Agnetta, G. A1 - Aguilar, J. A1 - Aharonian, Felix A. A1 - Ajello, M. A1 - Akhperjanian, A. G. A1 - Alcubierre, M. A1 - Aleksic, J. A1 - Alfaro, R. A1 - Aliu, E. A1 - Allafort, A. J. A1 - Allan, D. A1 - Allekotte, I. A1 - Amato, E. A1 - Anderson, J. A1 - Angüner, Ekrem Oǧuzhan A1 - Antonelli, L. A. A1 - Antoranz, P. A1 - Aravantinos, A. A1 - Arlen, T. A1 - Armstrong, T. A1 - Arnaldi, H. A1 - Arrabito, L. A1 - Asano, K. A1 - Ashton, T. A1 - Asorey, H. G. A1 - Awane, Y. A1 - Baba, H. A1 - Babic, A. A1 - Baby, N. A1 - Baehr, J. A1 - Bais, A. A1 - Baixeras, C. A1 - Bajtlik, S. A1 - Balbo, M. A1 - Balis, D. A1 - Balkowski, C. A1 - Bamba, A. A1 - Bandiera, R. A1 - Barber, A. A1 - Barbier, C. A1 - Barcelo, M. A1 - Barnacka, Anna A1 - Barnstedt, Jürgen A1 - Barres de Almeida, U. A1 - Barrio, J. A. A1 - Basili, A. A1 - Basso, S. A1 - Bastieri, D. A1 - Bauer, C. A1 - Baushev, Anton N. A1 - Becerra Gonzalez, J. A1 - Becherini, Yvonne A1 - Bechtol, K. C. A1 - Tjus, J. Becker A1 - Beckmann, Volker A1 - Bednarek, W. A1 - Behera, B. A1 - Belluso, M. A1 - Benbow, W. A1 - Berdugo, J. A1 - Berger, K. A1 - Bernard, F. A1 - Bernardino, T. A1 - Bernlöhr, K. A1 - Bhat, N. A1 - Bhattacharyya, S. A1 - Bigongiari, C. A1 - Biland, A. A1 - Billotta, S. A1 - Bird, T. A1 - Birsin, E. A1 - Bissaldi, E. A1 - Biteau, Jonathan A1 - Bitossi, M. A1 - Blake, S. A1 - Blanch Bigas, O. A1 - Blasi, P. A1 - Bobkov, A. A. A1 - Boccone, V. A1 - Boettcher, Markus A1 - Bogacz, L. A1 - Bogart, J. A1 - Bogdan, M. A1 - Boisson, Catherine A1 - Boix Gargallo, J. A1 - Bolmont, J. A1 - Bonanno, G. A1 - Bonardi, A. A1 - Bonev, T. A1 - Bonifacio, P. A1 - Bonnoli, G. A1 - Bordas, Pol A1 - Borgland, A. W. A1 - Borkowski, Janett A1 - Bose, R. A1 - Botner, O. A1 - Bottani, A. A1 - Bouchet, L. A1 - Bourgeat, M. A1 - Boutonnet, C. A1 - Bouvier, A. A1 - Brau-Nogue, S. A1 - Braun, I. A1 - Bretz, T. A1 - Briggs, M. S. A1 - Bringmann, T. A1 - Brook, P. A1 - Brun, Pierre A1 - Brunetti, L. A1 - Buanes, T. A1 - Buckley, J. H. A1 - Buehler, R. A1 - Bugaev, V. A1 - Bulgarelli, A. A1 - Bulik, Tomasz A1 - Busetto, G. A1 - Buson, S. A1 - Byrum, K. A1 - Cailles, M. A1 - Cameron, R. A. A1 - Camprecios, J. A1 - Canestrari, R. A1 - Cantu, S. A1 - Capalbi, M. A1 - Caraveo, P. A. A1 - Carmona, E. A1 - Carosi, A. A1 - Carr, John A1 - Carton, P. H. A1 - Casanova, Sabrina A1 - Casiraghi, M. A1 - Catalano, O. A1 - Cavazzani, S. A1 - Cazaux, S. A1 - Cerruti, M. A1 - Chabanne, E. A1 - Chadwick, Paula M. A1 - Champion, C. A1 - Chen, Andrew A1 - Chiang, J. A1 - Chiappetti, L. A1 - Chikawa, M. A1 - Chitnis, V. R. A1 - Chollet, F. A1 - Chudoba, J. A1 - Cieslar, M. A1 - Cillis, A. N. A1 - Cohen-Tanugi, J. A1 - Colafrancesco, Sergio A1 - Colin, P. A1 - Calome, J. A1 - Colonges, S. A1 - Compin, M. A1 - Conconi, P. A1 - Conforti, V. A1 - Connaughton, V. A1 - Conrad, Jan A1 - Contreras, J. L. A1 - Coppi, P. A1 - Corona, P. A1 - Corti, D. A1 - Cortina, J. A1 - Cossio, L. A1 - Costantini, H. A1 - Cotter, G. A1 - Courty, B. A1 - Couturier, S. A1 - Covino, S. A1 - Crimi, G. A1 - Criswell, S. J. A1 - Croston, J. A1 - Cusumano, G. A1 - Dafonseca, M. A1 - Dale, O. A1 - Daniel, M. A1 - Darling, J. A1 - Davids, I. A1 - Dazzi, F. A1 - De Angelis, A. A1 - De Caprio, V. A1 - De Frondat, F. A1 - de Gouveia Dal Pino, E. M. A1 - de la Calle, I. A1 - De La Vega, G. A. A1 - Lopez, R. de los Reyes A1 - De Lotto, B. A1 - De Luca, A. A1 - de Mello Neto, J. R. T. A1 - de Naurois, M. A1 - de Oliveira, Y. A1 - de Ona Wilhelmi, E. A1 - de Souza, V. A1 - Decerprit, G. A1 - Decock, G. A1 - Deil, C. A1 - Delagnes, E. A1 - Deleglise, G. A1 - Delgado, C. A1 - Della Volpe, D. A1 - Demange, P. A1 - Depaola, G. A1 - Dettlaff, A. A1 - Di Paola, A. A1 - Di Pierro, F. A1 - Diaz, C. A1 - Dick, J. A1 - Dickherber, R. A1 - Dickinson, H. A1 - Diez-Blanco, V. A1 - Digel, S. A1 - Dimitrov, D. A1 - Disset, G. A1 - Djannati-Ataï, A. A1 - Doert, M. A1 - Dohmke, M. A1 - Domainko, W. A1 - Prester, Dijana Dominis A1 - Donat, A. A1 - Dorner, D. A1 - Doro, M. A1 - Dournaux, J-L. A1 - Drake, G. A1 - Dravins, D. A1 - Drury, L. A1 - Dubois, F. A1 - Dubois, R. A1 - Dubus, G. A1 - Dufour, C. A1 - Dumas, D. A1 - Dumm, J. A1 - Durand, D. A1 - Dyks, J. A1 - Dyrda, M. A1 - Ebr, J. A1 - Edy, E. A1 - Egberts, Kathrin A1 - Eger, P. A1 - Einecke, S. A1 - Eleftheriadis, C. A1 - Elles, S. A1 - Emmanoulopoulos, D. A1 - Engelhaupt, D. A1 - Enomoto, R. A1 - Ernenwein, J-P A1 - Errando, M. A1 - Etchegoyen, A. A1 - Evans, P. A1 - Falcone, A. A1 - Fantinel, D. A1 - Farakos, K. A1 - Farnier, C. A1 - Fasola, G. A1 - Favill, B. A1 - Fede, E. A1 - Federici, S. A1 - Fegan, S. A1 - Feinstein, F. A1 - Ferenc, D. A1 - Ferrando, P. A1 - Fesquet, M. A1 - Fiasson, A. A1 - Fillin-Martino, E. A1 - Fink, D. A1 - Finley, C. A1 - Finley, J. P. A1 - Fiorini, M. A1 - Firpo Curcoll, R. A1 - Flores, H. A1 - Florin, D. A1 - Focke, W. A1 - Foehr, C. A1 - Fokitis, E. A1 - Font, L. A1 - Fontaine, G. A1 - Fornasa, M. A1 - Foerster, A. A1 - Fortson, L. A1 - Fouque, N. A1 - Franckowiak, A. A1 - Fransson, C. A1 - Fraser, G. A1 - Frei, R. A1 - Albuquerque, I. F. M. A1 - Fresnillo, L. A1 - Fruck, C. A1 - Fujita, Y. A1 - Fukazawa, Y. A1 - Fukui, Y. A1 - Funk, S. A1 - Gaebele, W. A1 - Gabici, S. A1 - Gabriele, R. A1 - Gadola, A. A1 - Galante, N. A1 - Gall, D. A1 - Gallant, Y. A1 - Gamez-Garcia, J. A1 - Garcia, B. A1 - Garcia Lopez, R. A1 - Gardiol, D. 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T1 - Introducing the CTA concept T2 - Astroparticle physics N2 - The Cherenkov Telescope Array (CTA) is a new observatory for very high-energy (VHE) gamma rays. CTA has ambitions science goals, for which it is necessary to achieve full-sky coverage, to improve the sensitivity by about an order of magnitude, to span about four decades of energy, from a few tens of GeV to above 100 TeV with enhanced angular and energy resolutions over existing VHE gamma-ray observatories. An international collaboration has formed with more than 1000 members from 27 countries in Europe, Asia, Africa and North and South America. In 2010 the CTA Consortium completed a Design Study and started a three-year Preparatory Phase which leads to production readiness of CTA in 2014. In this paper we introduce the science goals and the concept of CTA, and provide an overview of the project. KW - TeV gamma-ray astronomy KW - Air showers KW - Cherenkov Telescopes Y1 - 2013 U6 - https://doi.org/10.1016/j.astropartphys.2013.01.007 SN - 0927-6505 SN - 1873-2852 VL - 43 IS - 2 SP - 3 EP - 18 PB - Elsevier CY - Amsterdam ER -