Papers, Publications, and Manuals Page
The following are various publications and papers that we have written, along with the Manuals for the Expert AutoStats program and the 4N6XPRT StifCalcs program.
Current Expert AutoStats Manual (2007) [1.5 MB]
Current 4N6XPRT StifCalcs Manual (2-8-04) [50 K]
--------------------- ** ---------------------
To provide one example of software cost, and cost recovery, we have prepared an economic analysis scenario for the purchase and cost billing to your clients based upon our software. Of course, you know your clientele and what your region can stand as far as your billing is concerned, so you should consider this to be a model that you can change to suit your situation with regards to cost recovery. The 4N6XPRT Software Economic Analysis can be downloaded by clicking on the link.
--------------------- ** ---------------------
The November/December 2007 issue of Accident Reconstruction Journal contained an article entitled "A ComparisonofEquations for Estimating Speed Based on Maximum Static Deformation for Frontal Narrow-Object Impacts [1.2 Mb]" by Joseph N. Cofone, Andrew S. Rich, and John C. Scott. With permission from the authors, an updated version of this paper is available for download by clicking on the link. One of the equations in the comparison was the "Crush Factor" equation with a correction value to account for the concentration of energy which is found in Narrow-Object collisions. This research was conducted totally independant of our company, but supports the findings and conclusions in Dr. Vomhof's and Mr. Vomhof's papers below. This research is important to the Accident Reconstruction community as it gives a comparison of some of the more commonly used equations ( Craig Equations & Vomhof CF Method ) with equations and approachs which are somewhat more complicated to use but have the support of some of the higher level scientific community.
Dr. Vomhof's paper [400K] presented at CRASH'98 on the origin and use of the Crush Factor [400K] as published in the Expert AutoStats program.
Mr. Vomhof's paper presented at CRASH'98 comparing the Crush Factor as published in the Expert AutoStats program vs. A-B-G stiffness values [1.9 MB] for Ford Thunderbirds.
Utility vehicle rear impact tests are VERY limited in the NHTSA crash test database. A list of the Utility Vehicle Rear Crash Tests [130K] with associated stiffness values based on average and maximum reported crush depths, as generated from the 4N6XPRT StifCalcs program in 2005, can be downloaded by clicking on the link above.
--------------------- ** ---------------------
Mr. Vomhof's paper on why the KE Equivalent Speed (KEES) [500K] needs to be calculated for side and rear impact tests in the NHTSA Crash Test database.
--------------------- ** ---------------------
The Spring 2008 (Vol 12 No. 1) issue of "First Contact: The Newsletter for Crash Investigators" put out by IATAI - Illinois Association of Technical Accident Investigators contained an article by Mr. Vomhof entitled "Braking Effectiveness Lessens at Higher Speeds" Is Still True Today?? [ ~460K ]. A reprint of the article as submitted can be downloaded by clicking on the link. This article looks at and compares braking tests published for 2006-2007 model year vehicles which were tested from 60 mph braking to a stop as well as either 80 mph or 100 mph to a stop. The spread sheet containing this data can also be downloaded using the link below so that you may look at the data via different sorting criteria in ways that were not presented in the article.
2007 MY Braking-all Excel Spread sheet [~ 60K]
--------------------- ** ---------------------
Dr. Vomhof's paper presented at the F3T2 conference in Houston Texas, 9/17-21/2006 "Human Error - But Which Human and Whose Error" [14.7 MB] can be downloaded by clicking on the link. Also, for a limited time and article referenced by Dr. Vomhof regarding Human Factors in Traffic Engineering may be downloaded.
--------------------- ** ---------------------
Procedure to Change Attributes [1.7 MB] of a file or folder