German Criminal Police Office

About: German Criminal Police Office is a government organization based out in Wiesbaden, Germany. It is known for research contribution in the topics: Population & Mass spectrometry. The organization has 254 authors who have published 338 publications receiving 8489 citations.

Computer-Aided X-Ray Diffraction Identification of Crystalline Mixtures in Forensic Science Investigations

Abstract: X-ray diffraction analysis of multiphase mixtures is sometimes rather painstaking and time-consuming by conventional manual identification using search manuals and the Joint Committee on Powder Diffraction Standards (JCPDS) file. This is the reason why a search match program has been developed in FORTRAN IV using a 32 kB Data General Nova 3/12 minicomputer with floppy disk storage to evaluate X-ray diffraction patterns in an on-line mode, regardless of intensities, permitting the mixture components to be determined from a compiled data file of forensically relevant substances. This paper discusses the problems of procedure, program setup, and results.

Zwischen Co-Terrorismus und Lebensweltorientierung: Ist das Internet ein geeignetes Feld der Radikalisierungsprävention?

Abstract: Ausgehend von einem Begriffsverstandnis, dem zu Folge Radikalisierung als eine typische Begleiterscheinung gesellschaftlicher Entwicklung verstanden wird, die nicht automatisch in Gewalt oder gar Terrorismus mundet, werden Grundzuge einer Handlungsperspektive einer lebensweltorientierten und ideologieunspezifischen Radikalisierungspravention entwickelt. Im Lichte einer solchen Perspektive erscheint das Internet aufgrund bestimmter Einschrankungen nicht als vordringlicher Raum der Radikalisierungspravention.

Modeling the growth of fingerprints improves matching for adolescents

Abstract: We study the effect of growth on the fingerprints of adolescents, based on which we suggest a simple method to adjust for growth when trying to recover a juvenile's fingerprint in a database years later. Based on longitudinal data sets in juveniles' criminal records, we show that growth essentially leads to an isotropic rescaling, so that we can use the strong correlation between growth in stature and limbs to model the growth of fingerprints proportional to stature growth as documented in growth charts. The proposed rescaling leads to a 72% reduction of the distances between corresponding minutiae for the data set analyzed. These findings were corroborated by several verification tests. In an identification test on a database containing 3.25 million right index fingers at the Federal Criminal Police Office of Germany, the identification error rate of 20.8% was reduced to 2.1% by rescaling. The presented method is of striking simplicity and can easily be integrated into existing automated fingerprint identification systems.

Challenging material patterning: fine lithography on coarse substrates.

Abstract: Summary Precise patterning of inorganic materials is important for many technological applications. Often lithography processes are required on challenging substrates with respect to topography, flexibility, and surface adhesion. Here we show the fabrication of artificial gunshot residues (GSR) on adhesive tape samples by means of dip-pen lithography as an example for fine lithography on coarse substrates. We deposited lead-, barium-, and antimony-containing inks on SEM adhesive tape by direct writing with a fine tip. Single as well as multiple element structures with dimensions in the range of 10–75 µm were fabricated. SCANNING 36:362–367, 2014. © 2013 Wiley Periodicals, Inc.