It is well known that seeding can be used to produce narrow-bandwidth and fully coherent x-ray freeelectron lasers (FELs). Self-seeding, which uses an extra undulator to generate the seed pulse, is perhaps one of the most promising methods to accomplish this. In the hard x-ray regime with high-energy electrons, this method requires a large magnetic chicane to match the path-length delay of the ...

Based on a long-term introduction study of the species native to Russian Far East region, representative collection was collected, including wide range ecological groups. On basis conducted research, peculiarities preservation individual in fund (the ability persist culture for long time, vegetative renewal, self-seeding) are revealed. It is noted that number species, addition active overgrowth...

The possibility of extending the tunability Free-Electron Lasers towards short wavelengths has been explored through design devices conceived to enhance mechanisms nonlinear harmonic generation. In this respect, different schemes operation have suggested in past, such as seeding, bi-harmonic undulators, and two-beam self-seeding devices. paper, we discuss how these methods can be merged into a ...

Aggregation of misfolded proteins or peptides is a common feature of neurodegenerative diseases including Alzheimer's, Parkinson's, Huntington's, prion and other diseases. Recent years have witnessed a growing number of reports of overlap in neuropathological features that were once thought to be unique to only one neurodegenerative disorder. However, the origin for the overlap remains unclear....

Two models of circulating tumour cell (CTC) dynamics have been proposed to explain the phenomenon of tumour 'self-seeding', whereby CTCs repopulate the primary tumour and accelerate growth: primary seeding, where cells from a primary tumour shed into the vasculature and return back to the primary themselves; and secondary seeding, where cells from the primary first metastasize into a secondary ...

Spatio-temporal dynamics of singly resonant optical parametric oscillators with external seeding displays hexagonal, roll and honeycomb patterns, optical turbulence, rogue waves and cavity solitons. We derive appropriate mean-field equations with a sinc nonlinearity and demonstrate that offresonance seeding is necessary and responsible for the formation of complex spatial structures via selforg...