http://repository.president.ac.id/xmlui/handle/123456789/3996 2026-04-20T13:40:12Z 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 http://repository.president.ac.id/xmlui/handle/123456789/11742 PEMODELAN DAN ANALISA STRUKTUR MEKANIKA PADA KONTROL SISTEM ADAPTIF END EFFECTOR DENGAN DYNAMIXEL AX-18A MOTOR SERVO Anggraini, Lydia; Ardhi Bebi Laksono Tujuan utama dari proyek ini adalah untuk memberikan kontribusi secara deskriptif terhadap pemahaman perancangan adaptif end-effector yang dikombinasikan dengan motor servo. Simulasi dan perancangan alat ini terletak pada ujung lengan robot, yang mana merupakan salah satu topik yang paling banyak diteliti dalam dunia robotik dan industri otomasi. End-effector merupakan sistem perancangan pada sebuah proses otomasi yang harus memperhitungkan banyak kemungkinan dari respon statika dan mekanika dalam pengembangan menghadapi persaingan yang sangat ketat di dunia industri. Untuk menentukan perangkat tambahan pada suatu robot, end-effector akan didesain dengan mempertimbangkan dari berbagai kemungkinan yang terjadi pada berbagai variasi terhadap respon benda kerja, sehingga dapat mensimulasikan berbagai tingkat gesekan dan tekanan maupun pengaruh dari kontak end-effector dengan berbagai bentuk benda. Thesis ini memperkenalkan proses desain terpadu untuk desain Gripper dua jari dengan menggunakan simulasi. Untuk memfasilitasi desain terpadu dari Gripper, penulis memakai perangkat lunak Matlab R2015a / Simulink (SimMechanics) dan Inventor sebagai 3D Cad Model. Motor Servo yang akan digunakan disini adalah jenis motor servo Dynamixel AX-18A yang mempunyai kecepatan 97RPM dan Torsi sebesar 1,8 N.m dengan tegangan 12Volt. Untuk menghadapi revolusi industri 4.0 maka desain dan rancangan seperti alat ini akan membantu dalam proses improvisasi seiring teknologi yang semakin berkembang pesat dengan harapan dapat meminimalisir pengeluaran biaya yang berlebihan ketika melakukan improvement. Dari thesis ini bisa dilihat respon power, torque, speed, power in, power out, effeiciency dan current. Ketika suatu kasus memerlukan spesifikasi tertentu maka dengan perhitungan ini bisa dengan mudah menyelesaikan permasalahan hanya dengan mengganti motorservo yang sesuai dengan spesifikasi yang dikehendaki. Journal of Mechanical Engineering and Mechatronics 2018, Vol. 3 No. 1. 2018-01-01T00:00:00Z http://repository.president.ac.id/xmlui/handle/123456789/11741 Tensile Behavior of SM520B-1G Plate by SMAW Joint Applied for Elevated Highway Road Construction Anggraini, Lydia; Revi Rinaldi; Jalu Wening Wangsanagara The main objective of this project is to study the mechanical and chemical characteristics of the SM520B welding plate used in the Jakarta-Cikampek Elevated Highway construction. The construction is needed to decrease the high volume of vehicles passing the highway every day. SM520B metal plate is used as the material in the girder box due to high strength and toughness and also good weldability. There are several tests conducted in the lab of PT Biro Klasifikasi Indonesia (Persero), i.e., spark OES test, tensile test, bending test, Charpy impact test, macro hardness test, and macro etch test. Spark OES test result shows that SM520B is low alloy steel with 0.165% carbon content. The SM520B tensile test result determines that the average yield strength, i.e., 503.45 N/mm², and the average tensile strength, i.e., 608.87 N/mm² of SM520B steel plate has met the requirement according to ASTM DS67B standard. The bending test result shows that no crack was found in the welding area. The Charpy impact test results of SM520B Welding plate indicates that high impact energy occurs in the welding area with the highest value of 214,24 J and slowly reduces when approaching close to the fusion line, i.e., 186.08 J. Higher Hardness Vickers value occurs in the HAZ area of SM520B during Vickers hardness, i.e., 235.8 J and the macro etch test result on the welding plate indicate there is no significant crack, porosity, and slag inclusion found in the welding. Journal of Mechanical Engineering and Mechatronics, Vol. 8 No. 2, pp. 63 - 71 2023-01-01T00:00:00Z http://repository.president.ac.id/xmlui/handle/123456789/11740 SIFAT MEKANIS DAN STRUKTUR MIKRO PADA SAMBUNGAN LAS GESEK BAJA SCM415H UNTUK APLIKASI POROS RODA BELAKANG MOBIL Anggraini, Lydia; Bobby Salim Saputra This research aims to evaluate the mechanical properties and mi-crostructure of steel alloy SCM415H processed by friction welding for rear axle shaft application. Friction welding is a process to connect materials without using fillers and has a good quality of joint strength. Two different pressures of friction welding for 2.5 and 6 MPa were applied in this research. In addition, the initial condition of non-welded in SCM415H material was also investigat-ed. In order to evaluate the mechanical properties, several mechan-ical tests i.e. Vickers hardness, tensile, torque and ultrasonic test were carried out. The result of this research is better welding con-nection is obtained on the final pressure of 6 MPa. The Vickers hardness is 390 HV was obtained on the welding connection area. Furthermore, the result proved that the higher pressure will affect the higher strength in the welding connection interface. The result of this research is confirmed the welding connection was not easily broken. Therefore, this research has an important role to determine the pressure applied to the friction welding. Rekayasa Mesin, v. 10, n. 2, pp. 177 – 184, 2019 2019-01-01T00:00:00Z