http://repository.president.ac.id/xmlui/handle/123456789/3996 2026-05-11T23:44:17Z http://repository.president.ac.id/xmlui/handle/123456789/13881 PELATIHAN METODE SEMI SOLID SEBAGAI PROSES MANUFAKTUR LANJUT KEPADA PROFESIONAL DI LINGKUNGAN CIKARANG Rachmat, Rudi Suhradi; Anggraini, Lydia; Widodo, Wahyono Sapto; Nurdin, Ufi Mukhlisin Pelatihan metode semi solid dalam proses manufaktur lanjutan adalah proses yang melibatkan pemahaman penggunaan bahan semi solid dan pengembangan keterampilan manufaktur produk. Pelatihan ini biasanya diterapkan di industri farmasi dan kosmetik, dimana komposisi semi-padat sangat penting untuk mencapai sifat tertentu dari produk. Namun, tidak terbatas penerapannya dalam aplikasi tersebut, metode ini potensial digunakan pada proses manufaktur lanjut khususnya suku cadang komponen dalam industri mobil, elektronik serta mesin. Pelatihan mencakup persiapan bahan, pemrosesan, kontrol kualitas, keselamatan dan kepatuhan, serta pengembangan keterampilan praktis untuk mengoperasikan peralatan dan mengelola proses produksi. Tujuan dari pelatihan metode semi solid ini adalah untuk memastikan bahwa produk yang diproduksi berkualitas tinggi dan memenuhi persyaratan kualitas industri. 2023-01-01T00:00:00Z http://repository.president.ac.id/xmlui/handle/123456789/13874 IMPACT BEHAVIOR OF MULTI-LAYERED UHMWPE VESTS REINFORCED WITH TITANIUM AND PVC FOR BALLISTIC PROTECTION Effendi, Nabil Muzhaffar; Sastranegara, Azhari; Hernawan, Rendi; Anggraini, Lydia Achieving lightweight and high-performance bulletproof vests is essential for military and law enforcement, where balancing mobility and ballistic resistance is critical. This study investigates the ballistic performance of multi-layered Ultra-High Molecular Weight Polyethylene (UHMWPE) vests reinforced with titanium (Ti6Al4V) and polyvinyl chloride (PVC). Two innovative vest configurations were evaluated following National Institute of Justice (NIJ) Standard-0101.04 ballistics tests and simulated using the Finite Element Method (FEM). Experimental findings indicated that while Vest 1 significantly absorbed impact energy, it failed to prevent projectile penetration. In contrast, Vest 2, incorporating additional titanium and polymer layers, effectively mitigated the penetration of 9 mm Full Metal Jacket (FMJ) projectiles while maintaining a safe back-face signature (BFS). The FEM simulation results demonstrated strong agreement with the experimental data, validating the effectiveness of multi-material layering in enhancing ballistic resistance. This research presents a strategic integration of titanium and polymer composites designed to achieve superior ballistic resistance while maintaining lightweight properties. These findings provided valuable insights for developing advanced body armor designs suitable for high-performance military and law enforcement applications. 2025-01-01T00:00:00Z http://repository.president.ac.id/xmlui/handle/123456789/13873 EXPERIMENTAL AND COMPUTATIONAL ANALYSIS OF UHMWPE-BASED MULTI-LAYERED BULLETPROOF VESTS UNDER 9MM PROJECTILES IMPACT Timotius, Hizkia; Sastranegara, Azhari; Hernawan, Rendi; Sutisna, Nanang Ali; Anggraini, Lydia This study investigates the ballistic performance and energy absorption of multi-layered UHMWPE bulletproof vests against 9mm projectiles using experiments and finite element simulations (LS-DYNA). Two configurations were analyzed: a conventional structure and a sandwich-layered design incorporating UHMWPE, titanium (Ti6Al4V), and PVC. Ballistic tests, conducted per NIJ Level IIIA standards, were validated through simulations. The sandwich-layered vest exhibited superior energy dissipation, achieving BFS values of 12.03 mm (experiment) and 12.36 mm (simulation), effectively reducing blunt trauma risk. The multi-material approach enhanced penetration resistance and impact force distribution, while numerical models closely matched experimental findings, confirming reliability. Results demonstrate the feasibility of lightweight, high-performance ballistic armor. Future work will explore material optimization, configuration refinements, and testing with higher-caliber projectiles for broader applications. 2025-01-01T00:00:00Z http://repository.president.ac.id/xmlui/handle/123456789/13865 MODELLING CROP INSURANCE BASED ON WEATHER INDEX USING THE HOMOTOPY ANALYSIS FOR AMERICAN PUT OPTION Hidayat, Agus Sofian Eka; Afa, Monica Sandi; Kurniawan, Dedi The crop insurance in Indonesia (AUTP) is much focused on the area impacted by flood, drought, and pest attack. The complication of the procedure to claim the loss must follow several conditions. The different approaches in the insurance sector, using weather index can be taken into consideration to produce a variety of insurance products. This insurance product used the American put option with the primary asset is the rainfall and the cumulative rainfall to exercise the claim, considering the optimal execution limit. The homotopic analysis is used to determine the valuation of the American put option, which also becomes the insurance premium. The case study is focused on areas experiencing a drought so that insurance claims can be exercise when the rainfall index value is below a predetermined limit. Considering the normality of the rainfall data, the calculation of insurance premium was done for the first growing season. The insurance premium is varies based on the optimal execution limit, while the calculation of profit is based on the optimum limit exercise and the minimum rainfall for the growing season, and its different depended on insurance claim acceptance limits. 2021-01-01T00:00:00Z