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Kao Y.-Y.,Investigation Bureau | Cheng S.-C.,National Sun Yat - sen University | Cheng C.-N.,National Sun Yat - sen University | Shiea J.,National Sun Yat - sen University | Shiea J.,Kaohsiung Medical University
Journal of Mass Spectrometry | Year: 2016

Electrospray laser desorption ionization is an ambient ionization technique that generates neutrals via laser desorption and ionizes those neutrals in an electrospray plume and was utilized to characterize inks in different layers of copy paper and banknotes of various currencies. Depth profiling of inks was performed on overlapping color bands on copy paper by repeatedly scanning the line with a pulsed laser beam operated at a fixed energy. The molecules in the ink on a banknote were desorbed by irradiating the banknote surface with a laser beam operated at different energies, with results indicating that different ions were detected at different depths. The analysis of authentic $US100, $100 RMB and $1000 NTD banknotes indicated that ions detected in 'color-shifting' and 'typography' regions were significantly different. Additionally, the abundances of some ions dramatically changed with the depth of the aforementioned regions. This approach was used to distinguish authentic $1000 NTD banknotes from counterfeits. © Copyright 2015 John Wiley & Sons, Ltd. Source


Chiu N.-H.,Chien Hsin University of Science and Technology | Pu C.-E.,Investigation Bureau | Lin P.-D.,Aviation Safety Council | Wang S.-S.,Chien Hsin University of Science and Technology
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

Flight safety is very important issue for aviation industries. Analyzing the flight accidents on the basis of 2-dimensional image is hardly to illustrate the complex injuries of passengers in the flight cabin. However, how to illustrate the flight accident is a challenge from 2-dimensional space to 3-dimensional space. This study proposes a particle swarm optimization approach for improving the identification of objects from 2-dimensional image. The recognition results provide the information for building 3-dimensional systems for flight accident investigators. The experiments also show that it is a feasible approach for improving the identification of image objects. © 2012 SPIE. Source


Chiu N.-H.,Chien Hsin University of Science and Technology | Pu C.-E.,Investigation Bureau | Hsieh M.-C.,Chien Hsin University of Science and Technology
ICEIS 2013 - Proceedings of the 15th International Conference on Enterprise Information Systems | Year: 2013

The paper-moneys may face the problems of shreds in the unexpected accidents or human negligence. The reconstruction of ripped-up paper-moneys can demonstrate the evidences for decision makers or forensic examiners in order to exchange the complete paper-moneys. However, the reconstruction of ripped-up paper-moneys is very difficult on the basis of a lot of shreds with different distance factors that are measured from neighbouring pieces. How to identify the suitable feature weight for each distance factor is a critical issue for reconstructing the ripped-up paper-moneys. Particle swarm optimization is a search algorithm which is successfully adopted for solving many combination optimization problems in many fields. This study utilizes particle swarm optimization for exploring the proper feature weight for each distance factor to improve the reconstructed abilities. The proposed approach demonstrates the automatically reconstructing abilities which enhance the effects and efficiencies on the reconstruction of ripped-up paper-moneys. Source


Chen M.-Y.,Investigation Bureau | Pu C.-E.,Investigation Bureau | Wu F.-C.,Investigation Bureau | Lai H.-Y.,Investigation Bureau | Ho C.-W.,Tatung University
Proceedings - International Carnahan Conference on Security Technology | Year: 2016

A total of 656 unrelated males from Taiwan population were typed with 13 rapidly mutating Y-chromosome short tandem repeat (Y-STR) markers: DYF399S1, DYF387S1, DYS570, DYS576, DYS518, DYS526a+b, DYS626, DYS627, DYF403S1a+b, DYF404S1, DYS449, DYS547 and DYS612. 655 haplotypes of the RM 13 Y-STRs were obtained which only one haplotype was shared by two individuals. The combined haplotype diversity of the RM 13 Y-STRs was 0.9985. Allele frequencies for each locus are reported with nomenclature based on sequence analysis identical with published paper and recommendation from ISFG. Allele variances were observed in several loci when compared with allelic ladder by PCR duplicated. According to SWDGAM guidelines for Y-STR typing by forensic DNA laboratories, we illustrated the Y-STRs profile probability estimation by using Taiwan population database. © 2015 IEEE. Source


Wu F.-C.,Investigation Bureau | Wu F.-C.,Tatung University | Ho C.-W.,Tatung University | Pu C.-E.,Investigation Bureau | And 4 more authors.
International Journal of Legal Medicine | Year: 2011

The distribution of Y-chromosomal short tandem repeat (Y-STR) haplotypes was determined in a population of Taiwanese Paiwan aboriginals. Using 17 Y-STR markers, a total of 135 haplotypes were observed, 102 of which were unique. The overall haplotype diversity for the 17 Y-STR loci tested was 0.9922 and the discrimination capacity was 0.6490. In addition, three novel intermediate alleles at the DYS448 locus were also found. © 2010 The Author(s). Source

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