Judul: Pengembangan Aplikasi Mobile Profiling untuk Profiling Petani Kelapa Sawit Mandiri: Solusi Data untuk Ketertelusuran Rantai Pasok
Abstrak: This project was released to handle the challenges faced by smallholder farmers in Indonesia regarding palm oil supply chain traceability. A mobile application was developed to improve data collection and transparency. The palm oil industry plays a key role in the Indonesian economy but faces pressure to ensure sustainable practices. Traceability of Fresh Fruit Bunches (FFB) is crucial, and manual recording systems used by many smallholders are prone to errors and manipulation. This project aimed to develop a user-friendly mobile application for profiling palm oil farmers. The application allows farmers to register, record land data (including automatic area calculations based on GPS pinpoints), and upload profile information. Integration with a Firebase database ensures secure data storage and access for relevant stakeholders. A verification process is planned, in which cooperatives verify newly submitted farmer data before they can sell FFB. This application has the potential to streamline traceability efforts, improve transparency, and empower smallholder farmers in the palm oil supply chain. Future development will focus on hosting the application publicly and implementing location-based notification features.
Keyword: palm oil, supply chain, mobile application, traceability system

Judul: Pengembangan Aplikasi Buku Kerja Mandor Perkebunan Kelapa Sawit
Abstrak: Buku Kerja Mandor adalah aplikasi yang dirancang peneliti sebelumnya untuk menunjang kegiatan pencatatan hasil kerja mandor perkebunan kelapa sawit. Hasil dari penelitian tersebut adalah sebuah prototipe medium-fidelity serta tinjauan dari penguji yang merupakan calon pelanggan. Pada penelitian ini, dilakukan pengembangan aplikasi Buku Kerja Mandor di sistem operasi Android berdasarkan rancangan dari penelitian sebelumnya. Metode pengembangan aplikasi yang digunakan adalah metode Prototyping dengan dua kali iterasi yang berisi tahap komunikasi, perencanaan cepat, pemodelan rancangan cepat, konstruksi prototipe, dan penyebaran, penyampaian, dan umpan balik. Hasil dari penelitian ini adalah sebuah aplikasi yang telah melalui pengujian usability dengan pelanggan nyata, yaitu mandor perkebunan kelapa sawit. Aplikasi ini memberikan kecepatan dan fleksibilitas lebih kepada mandor perkebunan kelapa sawit dalam mencatat aktivitas harian., Buku Kerja Mandor is an application that was designed by previous researcher to support recording the work results of foremen in oil palm plantations. The results of said research were a medium-fidelity prototype and reviews from testers who are potential customers. In this research, Buku Kerja Mandor application was developed on Android operating system based on the design of the previous research. The application development method used is the Prototyping method with 2 iterations which contains the stages of communication, quick plan, modeling quick design, construction of prototype, and deployment, delivery, and feedback. The result of this research is an application that has been gone through usability test with real customers, namely foremen of oil palm plantation. This application provides more speed and flexibility for oil palm plantation foremen in recording daily activities.
Keyword: Android app development, Buku Kerja Mandor, Oil palm plantation, Prototyping method, Usability testing

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
Keyword: