Institution
University of Konstanz
Education•Konstanz, Baden-Württemberg, Germany•
About: University of Konstanz is a education organization based out in Konstanz, Baden-Württemberg, Germany. It is known for research contribution in the topics: Population & Membrane. The organization has 12115 authors who have published 27401 publications receiving 951162 citations. The organization is also known as: University of Constance & Universität Konstanz.
Topics: Population, Membrane, Politics, Laser, Gene
Papers published on a yearly basis
Papers
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TL;DR: This paper provides an overview of approaches that use quality metrics in high-dimensional data visualization and proposes a systematization based on a thorough literature review, which demonstrates the usefulness of the model by applying it to several existing approaches thatuse quality metrics.
Abstract: In this paper, we present a systematization of techniques that use quality metrics to help in the visual exploration of meaningful patterns in high-dimensional data. In a number of recent papers, different quality metrics are proposed to automate the demanding search through large spaces of alternative visualizations (e.g., alternative projections or ordering), allowing the user to concentrate on the most promising visualizations suggested by the quality metrics. Over the last decade, this approach has witnessed a remarkable development but few reflections exist on how these methods are related to each other and how the approach can be developed further. For this purpose, we provide an overview of approaches that use quality metrics in high-dimensional data visualization and propose a systematization based on a thorough literature review. We carefully analyze the papers and derive a set of factors for discriminating the quality metrics, visualization techniques, and the process itself. The process is described through a reworked version of the well-known information visualization pipeline. We demonstrate the usefulness of our model by applying it to several existing approaches that use quality metrics, and we provide reflections on implications of our model for future research.
259 citations
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TL;DR: In this paper, an effective Hamiltonian was derived for the conduction band of monolayer transition metal dichalcogenides (TMDC) in the presence of perpendicular electric and magnetic fields.
Abstract: We derive an effective Hamiltonian that describes the dynamics of electrons in the conduction band of monolayer transition metal dichalcogenides (TMDC) in the presence of perpendicular electric and magnetic fields. We discuss in detail both the intrinsic and the Bychkov-Rashba spin-orbit coupling induced by an external electric field. We point out interesting differences in the spin-split conduction band between different TMDC compounds. An important consequence of the strong intrinsic spin-orbit coupling is an effective out-of-plane g factor for the electrons that differs from the free-electron g factor g~=2. We identify a new term in the Hamiltonian of the Bychkov-Rashba spin-orbit coupling that does not exist in III-V semiconductors. Using first-principles calculations, we give estimates of the various parameters appearing in the theory. Finally, we consider quantum dots formed in TMDC materials and derive an effective Hamiltonian that allows us to calculate the magnetic field dependence of the bound states in the quantum dots. We find that all states are both valley and spin split, which suggests that these quantum dots could be used as valley-spin filters. We explore the possibility of using spin and valley states in TMDCs as quantum bits, and conclude that, due to the relatively strong intrinsic spin-orbit splitting in the conduction band, the most realistic option appears to be a combined spin-valley (Kramers) qubit at low magnetic fields.
259 citations
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TL;DR: Using video microscopy complete positional data are obtained over five decades in time for an ensemble of superparamagnetic colloidal particles confined to an air-water interface and it is found that each of the three phases is uniquely characterized by the long-time behavior of gamma(L)(t), g(6)(t) and the non-Gaussian parameter of the relative neighbor-neighbor displacement.
Abstract: The two-dimensional (2D) melting transition is analyzed on the basis of the long-time behavior of a modified Lindemann parameter in 2D gamma(L)(t) and the bond-angular correlation function g(6)(t) Using video microscopy complete positional data are obtained over five decades in time for an ensemble of superparamagnetic colloidal particles confined to an air-water interface We find that each of the three phases (solid/hexatic/isotropic liquid) is uniquely characterized by the long-time behavior of gamma(L)(t), g(6)(t), and the non-Gaussian parameter of the relative neighbor-neighbor displacement
258 citations
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TL;DR: High-resolution microscopy yields unsurpassed insight into mechanisms relevant both to the biomineralization of bone and teeth and to pathological mineralization.
Abstract: The mechanisms of biomineralization remain hotly debated. Now high-resolution microscopy yields unsurpassed insight into mechanisms relevant both to the biomineralization of bone and teeth and to pathological mineralization.
257 citations
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Forschungszentrum Jülich1, University of Mainz2, University of Paris3, University of Düsseldorf4, University of Oxford5, Max Planck Society6, Center of Advanced European Studies and Research7, Technical University of Denmark8, University of Cambridge9, University of Edinburgh10, Sant'Anna School of Advanced Studies11, Leipzig University12, University of Toronto13, Université libre de Bruxelles14, University of Barcelona15, University of Copenhagen16, Pennsylvania State University17, University of Konstanz18, Technical University of Berlin19, PSL Research University20, Polytechnic University of Catalonia21
TL;DR: The 2019 motile active matter roadmap of Journal of Physics: Condensed Matter addresses the current state of the art of the field and provides guidance for both students as well as established scientists in their efforts to advance this fascinating area as discussed by the authors.
Abstract: Activity and autonomous motion are fundamental in living and engineering systems. This has stimulated the new field of 'active matter' in recent years, which focuses on the physical aspects of propulsion mechanisms, and on motility-induced emergent collective behavior of a larger number of identical agents. The scale of agents ranges from nanomotors and microswimmers, to cells, fish, birds, and people. Inspired by biological microswimmers, various designs of autonomous synthetic nano- and micromachines have been proposed. Such machines provide the basis for multifunctional, highly responsive, intelligent (artificial) active materials, which exhibit emergent behavior and the ability to perform tasks in response to external stimuli. A major challenge for understanding and designing active matter is their inherent nonequilibrium nature due to persistent energy consumption, which invalidates equilibrium concepts such as free energy, detailed balance, and time-reversal symmetry. Unraveling, predicting, and controlling the behavior of active matter is a truly interdisciplinary endeavor at the interface of biology, chemistry, ecology, engineering, mathematics, and physics. The vast complexity of phenomena and mechanisms involved in the self-organization and dynamics of motile active matter comprises a major challenge. Hence, to advance, and eventually reach a comprehensive understanding, this important research area requires a concerted, synergetic approach of the various disciplines. The 2020 motile active matter roadmap of Journal of Physics: Condensed Matter addresses the current state of the art of the field and provides guidance for both students as well as established scientists in their efforts to advance this fascinating area.
257 citations
Authors
Showing all 12272 results
Name | H-index | Papers | Citations |
---|---|---|---|
Robert E. W. Hancock | 152 | 775 | 88481 |
Lloyd J. Old | 152 | 775 | 101377 |
Andrew White | 149 | 1494 | 113874 |
Stefanie Dimmeler | 147 | 574 | 81658 |
Rudolf Amann | 143 | 459 | 85525 |
Niels Birbaumer | 142 | 835 | 77853 |
Thomas P. Russell | 141 | 1012 | 80055 |
Emmanuelle Perez | 138 | 1550 | 99016 |
Shlomo Havlin | 131 | 1013 | 83347 |
Bruno S. Frey | 119 | 900 | 65368 |
Roald Hoffmann | 116 | 870 | 59470 |
Michael G. Fehlings | 116 | 1189 | 57003 |
Yves Van de Peer | 115 | 494 | 61479 |
Axel Meyer | 112 | 511 | 51195 |
Manuela Campanelli | 111 | 675 | 48563 |