Dr. Erol Kalkan, P.E.

QuakeLogic Inc.

Last seen: 15 Tage vor | Aktiv seit 2016

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I am a structural engineer and CEO of QUAKELOGIC. I earned my B.Sc. degree in Civil Engineering and M.Sc. degree in Engineering Seismology from the Middle East Technical University. My second M.Sc. degree in Structural Engineering is from the Bosporus (Bogazici) University in Turkey. My doctorate degree in Structural Engineering (major) and in Geotechnical Engineering (minor) is from the University of California, Davis. My postdoctoral studies were at the University of California, Berkeley. I authored and co-authored more than 120 peer-reviewed publications on various issues in structural engineering and engineering seismology. My research and publications are at www.quakelogic.net

Programming Languages:
Python, MATLAB, Fortran

Statistiken

All

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Feeds

Gesendet

SPECTRAL WHITENING
This function applies whitening to a given signal within user defined frequency band.

12 Monate vor | 12 Downloads |

Gesendet

Time-domain Sinc Interpolation (Resampling)
Time-domain SINC resampling (interpolation) function with a simple example

12 Monate vor | 14 Downloads |

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Complex Mode Indicator Function (CMIF)
This is a robust complex mode indicator function, which can be used to identify Eigen values. A simple example is provided.

mehr als ein Jahr vor | 2 Downloads |

Gesendet

Spectral acceleration, velocity and displacement spectra
This is a MatLAB function to compute linear-elastic damped response spectrum of time series

mehr als 4 Jahre vor | 24 Downloads |

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Nonlinear multi-axial constant ductility spectra (H,V,tilt)
Robust function to generate multi-component constant-ductility nonlinear-inelastic response spectra.

mehr als 4 Jahre vor | 1 Download |

Beantwortet
Finding the velocity from displacement
In regards to filtering the seismograms, I developed an automated algorithm: https://www.mathworks.com/matlabcentral/fileexchang...

fast 5 Jahre vor | 0

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An automated P-phase Arrival Time Picker with SNR output
PPHASEPICKER is a powerful tool for automatically picking P-phase onsets.

etwa 5 Jahre vor | 19 Downloads |

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spikeRemoval
This function replace or delete unwanted spikes (outliers) exceeding the threshold value using histogram method.

etwa 5 Jahre vor | 7 Downloads |

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smoothing function
smoothCurve offers various different window smoothing options.

etwa 5 Jahre vor | 2 Downloads |

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An Automated S-phase Arrival Time Picker with SNR Output
SPHASEPICKER is a powerful tool for automatically picking S-phase onsets.

etwa 5 Jahre vor | 8 Downloads |

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AUTODETECT BANDPASS FILTER CORNER FREQUENCIES
cornerFreqs automatically detects appropriate bandpass filter corner frequencies by comparing signal's spectrum with noise spect...

etwa 5 Jahre vor | 3 Downloads |

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Crop and save MatLAB figure as PDF (savePDF)
This simple function nicely crop the figure and save it as PDF

etwa 5 Jahre vor | 3 Downloads |

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inteFD
Computes integration of discrete time-signal in frequency domain

etwa 5 Jahre vor | 6 Downloads |

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diffFD
Computes derivative of discrete time-signal in frequency domain

etwa 5 Jahre vor | 1 Download |

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COMPUTE SMOOTH FOURIER AMPLITUDE SPECTRUM (smoothFAS)
This function computes Fourier amplitude spectrum and its smoothed version. For smoothing, it uses window averaging.

etwa 5 Jahre vor | 5 Downloads |

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SMOOTHING FUNCTION FOR FOURIER AMPLITUDE SPECTRUM
smoothSpectra offers different smoothing options for Fourier amplitude spectrum. Default window function is Konno-Ohmachi.

etwa 5 Jahre vor | 9 Downloads |

Gesendet

Piecewise Cubic Spline Interpolation (from NUMERICAL RECIPES in C)
Piecewise Cubic Spline Interpolation (from NUMERICAL RECIPES in C)

etwa 6 Jahre vor | 5 Downloads |

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xcorrFD(x,y)
xcorrFD takes two discrete time signals as input and calculates cross-correlation and delay

mehr als 6 Jahre vor | 3 Downloads |

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Frequency Response Function of Accelerometer (Oscillator)
This code computes frequency response function (FRF) of an accelerometer (SDF Oscillator)

fast 7 Jahre vor | 1 Download |

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TIME-DOMAIN CROSS-CORRELATION FUNCTION
xcorrTD takes two discrete time signals as input and calculates cross-correlation and delay

fast 7 Jahre vor | 7 Downloads |

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NONLINEAR-INELASTIC RESPONSE HISTORY ANALYSIS OF A SDOF OSCILLATOR USING OPENSEES
Fast MatLAB function for nonlinear-inelastic time-history analysis of a SDOF oscillator.

fast 7 Jahre vor | 2 Downloads |

Gesendet

Decimate (Downsample) A Signal in Frequency Domain
Frequency domain decimation function to reduce the sampling rate of a signal to a lower rate.

fast 7 Jahre vor | 2 Downloads |

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Epoch & Unix Timestamp Converter (epoch2UTC)
Converts an epoch/unix timestamp into a human readable date

fast 7 Jahre vor | 3 Downloads |

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NONLINEAR-INELASTIC MULTI-AXIAL TIME RESPONSE ANALYSIS OF SDOF OSCILLATOR
Robust MatLAB function for nonlinear-inelastic time-history analysis of SDOF oscillator

fast 7 Jahre vor | 1 Download |

Gesendet

Graizer-Kalkan (2015) Ground-Motion Prediction Equation
Graizer-Kalkan (2015) Ground-Motion Prediction Equation for earthquake strong motion estimates.

etwa 7 Jahre vor | 8 Downloads |

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Deconvolution of two discrete time signals in frequency domain
Compute deconvolution of two discrete time signals in frequency domain to study wave propagation.

etwa 7 Jahre vor | 6 Downloads |

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P-PHASE ARRIVAL TIME PICKER BASED ON AKAIKE INFORMATION CRITERION
Computes P-phase arrival time in windowed digital single-component seismic recording using AIC

mehr als 7 Jahre vor | 5 Downloads |

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Frequency-domain Zero-padding Resampling (Interpolation)
Frequency domain (FFT-based) resampling of discrete-time signal

mehr als 7 Jahre vor | 3 Downloads |

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Nonlinear-inelastic constant yield displacement response spectra
Compute nonlinear-inelastic constant yield displacement response spectra and input energy parameters

mehr als 7 Jahre vor | 5 Downloads |