PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY

This study aims to determine if the number of shots fired, bullet striation marks, and shooting and ricochet angles could influence bullet weight on three types of woods: Balau, Resak, and Seraya. The weapon and ammunition used in this study were CZ 75 SP-01 Shadow semi-automatic pistol with 9 mm full metal jacketed bullets (7.45 g). A total of 432 shots were fired, and only 114 bullets produced a ricochet effect. The result of objective one showed no significant relationship between the number of shots and the number of bullet striations for all three kinds of wood. Correlation-Regression analysis for the second objective showed a significant relationship between shooting angle and bullet weight when shooting on Balau (p < 0.01, R² = 0.065) and Seraya (p < 0.01, R² = 0.199) but not on Resak. The shooting angle influenced the bullet weight by 6.5 % to 20 % when shooting on Balau and Seraya. Both kinds of wood are closely related and share fibre composition and modulus of elasticity (MOE) characteristics. The result of the third objective showed a relationship between ricochet angle and bullet weight during the shooting on Resak (p < 0.01, R² = 0.142) but not on Balau and Seraya. The ricochet angle on Resak influenced the bullet weight by 14.2 + 9.8 %. It is probably due to Resak having the highest MOE among the three types of woods. This study concludes that bullet weight loss is due to the ricochet effect and the composition of the bullet’s target.

• Abbo, D. (2021). The ballistics case study of the Enrica Lexie incident. International Journal of Mechanical and Industrial Engineering, 15(5), 237-254.

• Abdullah, M. Y. (2015). Bicara dunia Melayu: Tradisi pelayaran Melayu [Narration of the Malay world: Malay sailing traditions]. Muzium Negeri Terengganu. http://www.jmm.gov.my/files/ORANG%20MELAYU%20DAN%20ALAM%20KELAUTAN.pdf

• Agensi Maritim Luar Negara. (2019). Latihan menembak senjata kecil pistol maritim negeri Kedah dan Perlis [Training of arms maritime pistols for the state of Kedah and Perlis]. https://www.mmea.gov.my/index.php/ms/?option=com_content&view=article&id= 144:logo-bendera-apmm& catid =18:mengenai-kami&Itemid=115

• Asyraf, M. R. M., Ishak, M. R., Sapuan, S. M., & Yidris, N. (2021). Comparison of static and long-term creep behaviors between balau wood and glass fiber reinforced polymer composite for cross-arm application. Fibers and Polymers, 22(3), 793-803. https://doi.org/10.1007/s12221-021-0512-1

• Atzampos, G., Paterson, D., Vassalos, D., & Boulougouris, E. (2018). A new era of fishing vessel safety emerges. In Transport Research Arena (TRA) (pp. 1-9). https://doi.org/10.5281/zenodo.1486497

• Azlan, H. M., Puaad, M. B. F. M., Ahmad, Z., Talip, A. R. A., & Yasin, M. H. (2018). Compressive strength properties of Malaysian tropical timber in structural size: Timber strength grading. In AIP Conference Proceedings (Vol. 2020, No. 1, p. 020034). AIP Publishing LLC. https://doi.org/10.1063/1.5062660

• Brian, J. H. (2008). Forensic firearms examination. In Handbook of Firearms and Ballistics: Examining and Interpreting Forensic Evidence (2nd ed.) (pp. 145-210). Wiley-Blackwell.

• Cvetković, T., Hinsinger, D. D., & Strijk, J. S. (2019). Exploring evolution and diversity of Chinese Dipterocarpaceae using next-generation sequencing. Scientific Reports, 9(1), 1-11. https://doi.org/10.1038/s41598-019-48240-y

• Dang, X. K., Ho, L. A. H., & Do, V. D. (2018). Analyzing the sea weather effects to the ship maneuvering in Vietnam’s sea from BinhThuan province to Ca Mau province based on fuzzy control method. TELKOMNIKA (Telecommunication Computing Electronics and Control), 16(2), 533-543. http://doi.org/10.12928/telkomnika.v16i2.7753

• Dewi, L. M., Damayanti, R., & Muslich, M. (2020). Inventory of wooden ship materials and determination of its alternative materials through wood properties approach: Case studies in the Riau Islands, the Northern and Southern Coast of Java. In IOP Conference Series: Earth and Environmental Science (Vol. 415, No. 1, p. 012014). IOP Publishing.

• Doelling, B. (2001, February 19-24). Comparison of four thousand consecutively fired, steel jacketed bullets from a 9x18mm makarov pistol. In Annual Meeting of the American Academy of Forensic Sciences. Seattle, Washington

• El-Taguri, H. A., Omar, N., Al-Hakimi, A. S., & Latiff, A. (2020). A revision of Vatica L. (Dipterocarpaceae) in Peninsular Malaysia. Malayan Nature Journal, 72(2), 229-266.

• Fu, W. L., Guan, H. Y., & Kei, S. (2021). Effects of moisture content and grain direction on the elastic properties of beech wood based on experiment and finite element method. Forests, 12(5), Article 610. https://doi.org/10.3390/f12050610

• Hamzah, N. H., Khairul, O., & Gina, F. G. (2020). Pemilikan Senjata Api di Malaysia [Firearms Ownership in Malaysia]. UKM Press.

• Hamzah, N. H. (2016). Development of an objective method for the comparison of fired projectiles using an air pistol as a template. Forensic Science International, 264, 106-112. https://doi.org/10.1016/j.forsciint.2016.03.050

• Karger, B., Hoekstra, A., & Schmidt, P. (2001). Trajectory reconstruction from trace evidence on spent bullets. International Journal of Legal Medicine, 115(1), 16-22. https://doi.org/10.1007/s004140000202

• Kerkhoff, W., Alberink, I., & Mattijssen, E.J.A.T. (2015). An Empirical study on the relation between the critical angle for bullet ricochet and the properties of wood. Journal of Forensic Sciences, 60(3), 605-610. https://doi.org/10.1111/1556-4029.12738

• Koene, L., & Broekhuis, F. R. (2017, September 11-15). Bullet penetration into wooden targets. In Proceedings of the 30th International Symposium on Ballistics 2017 (pp. 1905-1916). Long Beach, CA.

• Koene, L. (2016, May 9-13). Modelling bullet richochet from wooden targets. In Proceedings of the 29th International Symposium on Ballistics 2016 (pp. 1952-1963). Edinburgh, Scotland, UK.

• Kpenyigba, K.M., Jankowiak, T., Rusinek, A., Pesci, R., & Wang, B. (2015). Effect of projectile nose shape on ballistic resistance of interstitial-free steel sheets. International Journal of Impact Engineering, 79, 83-94. https://doi.org/10.1016/j.ijimpeng.2014.10.007

• Liscio, E., & Imran, R. (2020). Angle of impact determination from bullet holes in a metal surface. Forensic Science International, 317, Article 110504. https://doi.org/10.1016/j.forsciint.2020.110504

• Leon, F. P., & Beyerer, J. (1999). Automatic comparison of striation information on firearm bullets. In D. P. Casasent (Ed.), Intelligent Robots and Computer Vision XVIII: Algorithms, Techniques, and Active Vision (Vol. 3837, pp. 266-277). SPIE Digital Library. https://doi.org/10.1117/12.360306

• Mahanta, L. B., Bora, K., Kumar, R., Purkayastha, S., & Suresh, R. (2019). A pilot study on image processing methods for segmentation of striations in fired bullets. International Journal of Computer Sciences and Engineering, 7(3), 449-455.

• Maho, B., Sukontasukkul, P., Jamnam, S., Yamaguchi, E., Fujikake, K., & Banthia, N. (2019). Effect of rubber insertion on impact behavior of multilayer steel fiber reinforced concrete bulletproof panel. Construction and Building Materials, 216, 476-484. https://doi.org/10.1016/j.conbuildmat.2019.04.243

• Mahoney, P., Carr, D., Harrison, K., McGuire, R., Hepper, A., Flynn, D., Delaney, R.J., & Gibb, I. (2019) Forensic reconstruction of two military combat related shooting incidents using an anatomically correct synthetic skull with a surrogate skin/soft tissue layer. International Journal of Legal Medicine, 133(1), 151-162. https://doi.org/10.1007/s00414-018-1802-z

• Malaysian Timber Council. (2020a). Technical Information for Balau. http://mtc.com.my/wizards/mtc_tud/items/report(97).php

• Malaysian Timber Council. (2020b). Technical Information for Dark Red Meranti (Seraya). http://mtc.com.my/wizards/mtc_tud/items/report(103).php

• Malaysian Timber Council. (2020c). Technical Information for Resak. http://mtc.com.my/wizards/mtc_tud/items/report(102).php

• Mackay, M., Hardesty, B. D., & Wilcox, C. (2020). The intersection between illegal fishing, crimes at sea, and social well-being. Frontiers in Marine Science, 7, Article 589000. https://doi.org/10.3389/fmars.2020.589000

• Mattijssen, E. J. A. T., Alberink, I., Brouwer, S. D., & Kerkhoff, W. (2016). The influence of wood grain on the bullet’s ricochet behavior. Journal of Forensic Sciences, 61(3), 765-772. https://doi.org/10.1111/1556-4029.13023

• Mattijssen, E. J. A. T., Kerkhoff, W., & Bestebreurtje, M. E. (2017). Bullet trajectory after impact on laminated particle board. Journal of Forensic Sciences, 63(5), 1374-1382. https://doi.org/10.1111/1556-4029.13717

• Meier, E. (2019). Wood! Identifying and using Hundreds of Woods Worldwide. The Wood Database.

• Murdjoko, A., Marsono, D., Sadono, R., & Hadisusanto, S. (2016). Population dynamics of pometia for the period of post-selective logging in tropical rainforest, Southern Papua, Indonesia. Biosaintifika Journal of Biology & Biology Education, 8(3), 321-330.

• Muslich, M., & Sumarni, G. (2006). Keawetan 25 jenis kayu dipterocarpaceae terhadap penggerek kayu di laut [Durability of 25 types of dipterocarpaceae wood against sea wood borers]. Jurnal Penelitian Hasil Hutan, 24(3), 191-200. https://doi.org/10.20886/jphh.2006.24.3.191-200

• Nichols, R. (2018). Firearm and Toolmark Identification: The Scientific Reliability of the Forensic Science Discipline. Academic Press.

• Nishshanka, L. C. B., Shepherd, C., & Paranirubasingam, P. (2020). Forensic based empirical study on ricochet behaviour of Kalashnikov bullets (7.62 mm× 39 mm) on 1 mm sheet metal. Forensic Science International, 312, Article 110313. https://doi.org/10.1016/j.forsciint.2020.110313

• Nishshanka, L. C. B., Shepherd, C., Punyasena, M. A., & Ariyarathna, M. R. (2021a). Ricochet of AK bullets (7, 62× 39 mm) on concrete and cement surfaces; a forensic-based study. Science & Justice, 61(5), 467-476. https://doi.org/10.1016/j.scijus.2021.06.004

• Nishshanka, L. C. B., Shepherd, C., & Ariyarathna, R. (2021b). AK bullet (7.62× 39 mm) holes on 1‐mm sheet metal: A forensic‐related study in aid of bullet trajectory reconstruction. Journal of Forensic Sciences, 66(4), 1276-1284. https://doi.org/10.1111/1556-4029.14717

• Nordin, F. A. D., Bominathan, U. R., Abdullah, A. F. L., & Chang, K. H. (2020). Forensic significance of gunshot impact marks on inanimate objects: The need for translational research. Journal of Forensic Sciences, 65(1), 11-25. https://doi.org/10.1111/1556-4029.14142

• Puaad, M. B. F. M., Ahmad, Z., Talip, A. R. A., Salleh, M. Z. M., & MohamÂmad, S. N. (2020). Torsional shear strength properties of malaysian tropical timber in structural size. Jurnal Teknologi, 82(5), 1-10.

• Slater, D., & Ennos, R. (2015). Interlocking wood grain patterns provide improved wood strength properties in forks of hazel (Corylus avellana L.). Arboricultural Journal, 37(1), 21-32. https://doi.org/10.1080/03071375.2015.1012876

• United Nations Office on Drugs and Crime. (2011). Transnational organised crime in the fishing industry: Focus on: Trafficking in persons smuggling of migrants illicit drugs trafficking. United Nations. https://www.unodc.org/documents/human-trafficking/Issue_Paper_-_TOC_in_the_Fishing_Industry.pdf

• Vermeij, E., Rijnders, M., Pieper, P., & Hermsen, R. (2012). Interaction of bullets with intermediate targets: material transfer and damage. Forensic Science International, 223(1-3), 125-135. https://doi.org/10.1016/j.forsciint.2012.08.016

• Wahab, M. R. A., & Ramli, Z. (2020). The Malay traditional boat: Defending Malay heritage objects in Kelantan, East Coast of the Malaysian Peninsula. Journal of Maritime Archaeology, 15(1), 57-68. https://doi.org/10.1007/s11457-019-09247-8

• Wahid, A. S. (2020, August 21). Nelayan tempatan jadi tali barut [Local fishermen become informers]. Sinarharian. https://www.sinarharian.com.my/article/97675/ EDISI/Kelantan/Nelayan-tempatan-jadi-tali-barut.

• Walters, M., & Liscio, E. (2020). The accuracy and repeatability of reconstructing single bullet impacts using the 2D ellipse method. Journal of Forensic Sciences, 65(4), 1120-1127. https://doi.org/10.1111/1556-4029.14309

• Widiyono, W. (2021). Biological and economic value of Dipterocarpaceae, the main timber forest product of Indonesia. Applied Environmental Studies, 2(2), 104-112.

• Wong, K. S., & Jacobson, J. (2013). Angle of impact determination from bullet holes. Journal of Forensic Identification, 63(3), 233-246.