Dr. Erol Kalkan, P.E.
QuakeLogic Inc.
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
Python, MATLAB, Fortran
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Feeds
Submitted
SPECTRAL WHITENING
This function applies whitening to a given signal within user defined frequency band.
3 years ago | 1197 downloads |
Submitted
Time-domain Sinc Interpolation (Resampling)
Time-domain SINC resampling (interpolation) function with a simple example
3 years ago | 2138 downloads |
Submitted
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 years ago | 623 downloads |
Submitted
Spectral acceleration, velocity and displacement spectra
This is a MatLAB function to compute linear-elastic damped response spectrum of time series
7 years ago | 2480 downloads |
Submitted
Nonlinear multi-axial constant ductility spectra (H,V,tilt)
Robust function to generate multi-component constant-ductility nonlinear-inelastic response spectra.
7 years ago | 303 downloads |
Finding the velocity from displacement
In regards to filtering the seismograms, I developed an automated algorithm: https://www.mathworks.com/matlabcentral/fileexchang...
7 years ago | 0
Submitted
An automated P-phase Arrival Time Picker with SNR output
PPHASEPICKER is a powerful tool for automatically picking P-phase onsets.
7 years ago | 1641 downloads |
Submitted
spikeRemoval
This function replace or delete unwanted spikes (outliers) exceeding the threshold value using histogram method.
7 years ago | 759 downloads |
Submitted
smoothing function
smoothCurve offers various different window smoothing options.
7 years ago | 431 downloads |
Submitted
An Automated S-phase Arrival Time Picker with SNR Output
SPHASEPICKER is a powerful tool for automatically picking S-phase onsets.
7 years ago | 489 downloads |
Submitted
AUTODETECT BANDPASS FILTER CORNER FREQUENCIES
cornerFreqs automatically detects appropriate bandpass filter corner frequencies by comparing signal's spectrum with noise spect...
7 years ago | 616 downloads |
Submitted
Crop and save MatLAB figure as PDF (savePDF)
This simple function nicely crop the figure and save it as PDF
7 years ago | 530 downloads |
Submitted
inteFD
Computes integration of discrete time-signal in frequency domain
7 years ago | 1110 downloads |
Submitted
diffFD
Computes derivative of discrete time-signal in frequency domain
7 years ago | 543 downloads |
Submitted
COMPUTE SMOOTH FOURIER AMPLITUDE SPECTRUM (smoothFAS)
This function computes Fourier amplitude spectrum and its smoothed version. For smoothing, it uses window averaging.
7 years ago | 366 downloads |
Submitted
SMOOTHING FUNCTION FOR FOURIER AMPLITUDE SPECTRUM
smoothSpectra offers different smoothing options for Fourier amplitude spectrum. Default window function is Konno-Ohmachi.
7 years ago | 613 downloads |
Submitted
Piecewise Cubic Spline Interpolation (from NUMERICAL RECIPES in C)
Piecewise Cubic Spline Interpolation (from NUMERICAL RECIPES in C)
8 years ago | 270 downloads |
Submitted
xcorrFD(x,y)
xcorrFD takes two discrete time signals as input and calculates cross-correlation and delay
8 years ago | 612 downloads |
Submitted
Frequency Response Function of Accelerometer (Oscillator)
This code computes frequency response function (FRF) of an accelerometer (SDF Oscillator)
9 years ago | 355 downloads |
Submitted
TIME-DOMAIN CROSS-CORRELATION FUNCTION
xcorrTD takes two discrete time signals as input and calculates cross-correlation and delay
9 years ago | 896 downloads |
Submitted
NONLINEAR-INELASTIC RESPONSE HISTORY ANALYSIS OF A SDOF OSCILLATOR USING OPENSEES
Fast MatLAB function for nonlinear-inelastic time-history analysis of a SDOF oscillator.
9 years ago | 890 downloads |
Submitted
Decimate (Downsample) A Signal in Frequency Domain
Frequency domain decimation function to reduce the sampling rate of a signal to a lower rate.
9 years ago | 427 downloads |
Submitted
Epoch & Unix Timestamp Converter (epoch2UTC)
Converts an epoch/unix timestamp into a human readable date
9 years ago | 282 downloads |
Submitted
NONLINEAR-INELASTIC MULTI-AXIAL TIME RESPONSE ANALYSIS OF SDOF OSCILLATOR
Robust MatLAB function for nonlinear-inelastic time-history analysis of SDOF oscillator
9 years ago | 414 downloads |
Submitted
Graizer-Kalkan (2015) Ground-Motion Prediction Equation
Graizer-Kalkan (2015) Ground-Motion Prediction Equation for earthquake strong motion estimates.
9 years ago | 599 downloads |
Submitted
Deconvolution of two discrete time signals in frequency domain
Compute deconvolution of two discrete time signals in frequency domain to study wave propagation.
9 years ago | 10962 downloads |
Submitted
P-PHASE ARRIVAL TIME PICKER BASED ON AKAIKE INFORMATION CRITERION
Computes P-phase arrival time in windowed digital single-component seismic recording using AIC
10 years ago | 566 downloads |
Submitted
Frequency-domain Zero-padding Resampling (Interpolation)
Frequency domain (FFT-based) resampling of discrete-time signal
10 years ago | 654 downloads |
Submitted
Nonlinear-inelastic constant yield displacement response spectra
Compute nonlinear-inelastic constant yield displacement response spectra and input energy parameters
10 years ago | 350 downloads |
Submitted
ASCE 41-06 Displacement Coefficient Method
Displacement coefficient method of ASCE 41-06 based on FEMA 440
10 years ago | 234 downloads |
