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As the length of the seed record increases, the differences become exponentially larger (notice the logarithmic scale used in the y-axis).
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The new algorithm is evaluated using a typical design spectrum from the nuclear industry and different seed records.
Top: the target UHRS at the rock outcrop and the scaled response spectra for the three seed records.
The initial level of matching of the seed records was estimated using the root mean square deviation (D rms ) between the spectral amplitudes, Eq. (6).
Once the seed records are selected, they are modified to make them compatible with the design spectrum while complying with Appendix F of R.G. 1.208 [1].
This methodology has been shown to preserve the main characteristics of the seed records (e.g. Perez-Rivera and Montejo [18]).
Three different seed records to be used as input for the algorithm were selected from the PEER NGA database (PEER 2013) based on the similarity of the response spectrum shape of the records with the shape of the target spectrum.
The seed records were obtained from the Next Generation Attenuation of Ground Motions (NGA-West2) database [14] and its selection was based on the overall spectral shape resemblance between the records response spectra and the target design spectrum [15].
Table 1 Summary of the selected seed records NGA number Event Station Magnitude Mechanism Rrupt km) Vs30 (m/s) 1521 1999 Chi-Chi, Taiwan TCU089 7.62 Reverse/oblique 8.9 680 1508 1999 Chi-Chi, Taiwan TCU072 7.62 Reverse/oblique 7 468 284 1980 Irpinia, Italy Auletta 6.90 Normal 9.6 1,000.
No seed records with ages younger than Oligocene are known from Asia [ 47].
Will there be a new Lightning Seeds record? I've started writing, but I want to make music that doesn't sound like me, in a way.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com