02111nam a2200169   4500001000700000100004100007101000800048200019700056210011200253215001900365300015300384330117100537606003201708606001601740606002901756710015601785394680  a20170823d2014       y0pory50      ba  aeng  aPerformance evaluation and utility assessment of magneto-optical sensor technology for detecting and visualizing obliterated serial numbers in firearmsbRecurso eletrónicofRTI International  aWashington, DCcForensic Technology Center of Excellence (FTCoE). National Institute of Justice (NIJ)d2014  a1CD-ROMd12 cm  aresearch report submitted to the U.S. Department of Justice. FY2011 Award number: 2011-DN-BX-K564. Ficheiro de 1,52 MB em formato PDF (31 p.).  a1. Introduction. 2. Magneto–Optical (MO) Sensor Technology. 2.1 MO Sensor Concept. 2.2 MO Sensor Technology Tested. 2.2.1 How it works- 2.2.2 Availability. 3. Performance assessment. 3.1 Technical performance factors as defined for this project. 3.2 Non–technical performance factors as defined for this project. 4. Experimental design. 4.1 Methodology. 5. Performance testing. 6. Performance evaluation. 6.1 Magnetic particle inspection. 6.2 Comparison: MO Sensor and MPI. 6.3 Comparison: MO Sensor and Chemical Etching. 7. Lessons learned. 7.1 Sensor design issues. 7.2 MO Sensor selection considerations. 7.3 MO Sensor technology limitations. 7.4 Need for future development and testing. 8. Conclusions. 9. Bibliography. Appendix A: MO Sensor steel serial number detection and visualization. Appendix B: MPI Steel serial number detection and visualization. Appendix C: Chemical etching steel serial number detection and visualization. Appendix D: Chemical etching other substrate serial number detection and visualization. Appendix E: Derivation of MO vs MPI contingency table values. Appendix F: Derivation of MO vs chemical etching contingency table values.  aARMA DE FOGO E MUNIÇÕES  aBALÍSTICA  aANÁLISE DE VESTÍGIOS  aPERFORMANCE EVALUATION AND UTILITY ASSESSMENT OF MAGNETO-OPTICAL SENSOR TECHNOLOGY FOR DETECTING AND VISUALIZING OBLITERATED SERIAL NUMBERS IN FIREARMS