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Questions related from Jiří Ambros
I wonder if you could share your experience with "backstage" of scientific writing. I don't mean technical content but the conditions of writing itself - for example: - Do you start writing from...
08 August 2016 5,963 9 View
May I draw your attention to one older question, which is still not answered? Thank you! https://www.researchgate.net/post/what_is_the_acceptable_R2_value
05 May 2016 494 3 View
For national (or regional) road safety evaluations and comparison we have been using two safety performance indicators (SPIs): - direct (crashes, fatalities, injuries...) - indirect (speed,...
03 March 2015 6,576 5 View
In SPSS (or SAS) I need to calculate measures of validity between regression models, such as mean prediction bias (MPB), mean absolute deviation (MAD) or mean squared prediction error (MSPE). Can...
02 February 2015 5,894 4 View
I have been developing various regression models for road crash frequency. I use generalized linear models (SPSS GENLIN or SAS GENMOD procedures), negative binomial (NB) distribution, log link...
02 February 2015 352 6 View
Generally said, I plan to validate a specific indicator X (derived from driving behaviour) which should be linked to traffic safety (accidents) on level of road sections. Validation should...
01 January 1970 3,308 3 View
Can somebody help estimating how many analysis units (number of railway level crossings - RLCs) will I need to build a crash prediction model (safety performance function)? From some past analyses...
01 January 1970 1,759 4 View
