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Dr. Erol Kalkan, P.E.


QuakeLogic Inc.

Last seen: 約2ヶ月 前 2016 年からアクティブ

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

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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.

4ヶ月 前 | ダウンロード 12 件 |

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

約2年 前 | ダウンロード 27 件 |

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

約3年 前 | ダウンロード 24 件 |

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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.

約3年 前 | ダウンロード 1 件 |

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

3年以上 前 | 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.

3年以上 前 | ダウンロード 6 件 |

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

3年以上 前 | ダウンロード 9 件 |

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smoothing function
smoothCurve offers various different window smoothing options.

4年弱 前 | ダウンロード 9 件 |

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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.

4年弱 前 | ダウンロード 3 件 |

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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...

4年弱 前 | ダウンロード 15 件 |

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

4年弱 前 | ダウンロード 11 件 |

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inteFD
Computes integration of discrete time-signal in frequency domain

4年弱 前 | ダウンロード 11 件 |

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diffFD
Computes derivative of discrete time-signal in frequency domain

4年弱 前 | ダウンロード 3 件 |

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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.

4年弱 前 | ダウンロード 4 件 |

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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.

4年弱 前 | ダウンロード 6 件 |

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

4年以上 前 | ダウンロード 2 件 |

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

5年弱 前 | ダウンロード 14 件 |

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

約5年 前 | ダウンロード 8 件 |

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

5年以上 前 | ダウンロード 5 件 |

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

5年以上 前 | ダウンロード 5 件 |

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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.

5年以上 前 | ダウンロード 11 件 |

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

5年以上 前 | ダウンロード 3 件 |

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

5年以上 前 | ダウンロード 2 件 |

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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

5年以上 前 | ダウンロード 5 件 |

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

5年以上 前 | ダウンロード 5 件 |

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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.

6年弱 前 | ダウンロード 21 件 |

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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

約6年 前 | ダウンロード 4 件 |

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

約6年 前 | ダウンロード 11 件 |

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

6年以上 前 | ダウンロード 7 件 |

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ASCE 41-06 Displacement Coefficient Method
Displacement coefficient method of ASCE 41-06 based on FEMA 440

6年以上 前 | ダウンロード 2 件 |

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