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Nonlinear method of vehicle velocity determination based on inverse system and tensor product of Legendre polynomials - intermediate class

100%

Goslawski L. , Gralewski J. , Krukowski M. , Kubiak P. , Manko M. , Mrowicki A. , De Sousa R. A. , Sys E.

2019

tom Vol. 83, nr 1

133--149

Presented paper discusses two different nonlinear approaches to precrash velocity determination for vehicles from Intermediate Car Class. Data that was used to perform analyses introduced in this paper was taken from National Highway Traffic Safety Administration (NHTSA) database. Such database is comprised of substantial number of crash cases and main focus was put on frontal impacts. Hitherto used energy methods are based on linear model which proves to be inaccurate and producing significant errors. Presented considerations concern the inverse system and tensor product of Legendre polynomials. The focus of those methods is to establish the value of nonlinear coefficient bk which is the slope factor of precrash velocity Vt and deformation ratio Cs function.

Forensic and manufacturer aspects of VIN production and location on motor vehicles

84%

Rak R. , Kolitschova P.

2018

tom Vol. 82, nr 4

131--142

A vehicle identification number (VIN) is an unambiguous, globally unique vehicle identifier. The paper describes principles for its location on a vehicle, the method of its making (manufacture) and, last but not least, types of protection against negative factors to ensure that its identification value is preserved and, simultaneously, the process of identification inspection of a vehicle is clear, fast and efficient. The text analyses various views on VINs from the point of view of vehicle manufacturers, administrative bodies (that use vehicle identification in nationwide vehicle registers) and law-enforcement bodies during the investigation and gathering of evidence of car crime.