Institution
Tampere University of Technology
About: Tampere University of Technology is a based out in . It is known for research contribution in the topics: Laser & Context (language use). The organization has 6802 authors who have published 19787 publications receiving 431793 citations. The organization is also known as: Tampereen teknillinen yliopisto.
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13 Dec 2011
TL;DR: It is shown how a suitably low frequency modulation on a continuous wave field induces higher-order modulation instability splitting with the pulse characteristics at different phases of evolution related by a simple scaling relationship.
Abstract: We report theoretical, numerical, and experimental studies of higher-order modulation instability in the focusing nonlinear Schrodinger equation. This higher-order instability arises from the nonlinear superposition of elementary instabilities, associated with initial single breather evolution followed by a regime of complex, yet deterministic, pulse splitting. We analytically describe the process using the Darboux transformation and compare with experiments in optical fiber. We show how a suitably low frequency modulation on a continuous wave field induces higher-order modulation instability splitting with the pulse characteristics at different phases of evolution related by a simple scaling relationship. We anticipate that similar processes are likely to be observed in many other systems including plasmas, Bose-Einstein condensates, and deep water waves.
178 citations
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TL;DR: Real-time measurements are performed in an optical fibre system of the unstable breakup of a continuous wave field, simultaneously characterizing emergent modulation instability breather pulses and their associated statistics, which allow quantitative comparison between experiment, modelling and theory.
Abstract: Modulation instability is a fundamental process of nonlinear science, leading to the unstable breakup of a constant amplitude solution of a physical system. There has been particular interest in studying modulation instability in the cubic nonlinear Schrodinger equation, a generic model for a host of nonlinear systems including superfluids, fibre optics, plasmas and Bose-Einstein condensates. Modulation instability is also a significant area of study in the context of understanding the emergence of high amplitude events that satisfy rogue wave statistical criteria. Here, exploiting advances in ultrafast optical metrology, we perform real-time measurements in an optical fibre system of the unstable breakup of a continuous wave field, simultaneously characterizing emergent modulation instability breather pulses and their associated statistics. Our results allow quantitative comparison between experiment, modelling and theory, and are expected to open new perspectives on studies of instability dynamics in physics.
178 citations
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TL;DR: The combination of scaffold material such as beta-tricalcium phosphate and autologous adipose-derived stem cells constitutes a promising model for reconstruction of human large cranial defects.
Abstract: Background There is no optimal method for reconstruction of large calvarial defects. Because of the limitations of autologous bone grafts and alloplastic materials, new methods for performing cranioplasties are needed. Objective To create autologous bone to repair cranial defects. Methods We performed a cranioplasty procedure with this new method in 4 patients who had large calvarial defects of different etiologies. We used autologous adipose-derived stem cells seeded in beta-tricalcium phosphate granules. For 2 patients, we used a bilaminate technique with resorbable mesh. Results During follow-up, there were no clinically relevant postoperative complications. The computed tomography scans revealed satisfactory outcome in ossification, and in the clinical examinations, the outcomes were good. The cranioplasty was measured in Hounsfield units from each computed tomography scan. The Hounsfield units increased gradually to equal the value of bone. Conclusion The combination of scaffold material such as beta-tricalcium phosphate and autologous adipose-derived stem cells constitutes a promising model for reconstruction of human large cranial defects. The success of these clinical cases paves way for further studies and clinical applications to turn this method into a reliable treatment regimen.
177 citations
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TL;DR: This study provided a proof-of-concept of a two-step approach in metal bioleaching from PCB, by bacterially produced lixiviants, by chemolithotrophic acidophilic Acidithiobacillus ferrivorans and A. thiooxidans.
177 citations
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TL;DR: Interestingly, these aberrations lead to activation of the receptor, despite treatment-induced emergence of therapy-resistant tumor clones, indicating that CRPCs remain androgen-sensitive.
176 citations
Authors
Showing all 6802 results
Name | H-index | Papers | Citations |
---|---|---|---|
Terho Lehtimäki | 142 | 1304 | 106981 |
Prashant V. Kamat | 140 | 725 | 79259 |
Ian F. Akyildiz | 117 | 612 | 99653 |
Shunichi Fukuzumi | 111 | 1256 | 52764 |
Tetsuo Nagano | 96 | 490 | 34267 |
Andreas Hirsch | 90 | 778 | 36173 |
Ralf Metzler | 86 | 511 | 34793 |
Teuvo L.J. Tammela | 84 | 630 | 32847 |
Hiroshi Imahori | 79 | 472 | 24047 |
Yasuteru Urano | 79 | 356 | 24884 |
Jiri Matas | 78 | 345 | 44739 |
Piet N.L. Lens | 77 | 633 | 23367 |
Nail Akhmediev | 76 | 469 | 24205 |
Luis Echegoyen | 74 | 576 | 20094 |
Ilpo Vattulainen | 73 | 325 | 16445 |