Judul: Mobile Application Development for Shrimp  Pond Water Quality Monitoring and Control System
Abstrak: Udang merupakan salah satu komoditas budidaya perairan di Indonesia. Nilai ekspor sebesar 1.719.172.000 USD pada tahun 2019, membuat udang memiliki potensi besar untuk meningkatkan devisa negara. Potensi yang besar tersebut diikuti dengan resiko yang besar seperti pencemaran lingkungan dan kegagalan budidaya. Hal tersebut menjadi alasan dilakukannya pengembangan aplikasi front-end mobile Water Quality Monitoring and Controlling System menggunakan framework Flutter. Melalui aplikasi yang dikembangkan, petambak udang dapat memantau dan mengontrol kualitas air berdasarkan data sensor yang ditanamkan pada kolam tambak udang. Aplikasi ini dikembangkan menggunakan metode agile dengan framework Scrum. Diawali dengan User Requirement Analysis untuk perencanaan product backlog yang berisikan fitur yang dibutuhkan dan pelaksanaan sprint. Sprint dilakukan melalui 4 tahap, yaitu sprint planning, daily scrum, sprint review dan sprint retrospective. Sprint yang dilaksanakan selama 89 hari (4 sprint) telah menghasilkan aplikasi dengan fitur utama Monitoring, Maintenance dan Aktivasi perangkat IoT., Shrimp is one of the aquaculture commodities in Indonesia. The export value of 1,719,172,000 USD in 2019, makes shrimp has great potential to increase foreign exchange. This great potential is followed by great risks such as environmental pollution and cultivation failure. This is the reason for developing a front-end mobile Water Quality Monitoring and Controlling System application using the Flutter framework. Through the developed application, shrimp farmers can monitor and control water quality based on sensor data embedded in shrimp ponds. This application was developed using agile method with Scrum framework. It begins with User Requirement Analysis for product backlog planning which contains the required features and sprint implementation. Sprints are carried out through 4 stages, namely sprint planning, daily scrum, sprint review and sprint retrospective. The sprint that was carried out for 89 days (4 sprints) has produced an application with the main features of Monitoring, Maintenance and Activation of IoT devices.
Keyword: flutter, aplikasi mobile, Recirculating Aquaculture System (RAS), scrum

Judul: User Experience Design of Shrimp Pond Monitoring and Controlling Application using Five Planes Framework
Abstrak: Tantangan produktivitas yang tidak konsisten dan risiko penyakit udang dalam budi daya udang vaname (Litopenaeus vannamei) di Indonesia mendorong perlunya pengoptimalan dalam aplikasi Mobile RAS Plasma FineBubble, sistem monitoring dan controlling kunci di BPIU2K. Penelitian ini menggunakan framework Five Planes dan Retrospective Think Aloud untuk merancang pengalaman pengguna yang efektif. Data kuantitatif dan kualitatif dari stakeholder dan pakar perikanan BPIU2K dianalisis untuk mengukur kepuasan pengguna dan mengidentifikasi potensi kesalahan operasional. Hasil evaluasi menunjukkan bahwa penyesuaian fitur sesuai kebutuhan pengguna dapat meningkatkan efisiensi operasional dan kesehatan udang. Penelitian ini diharapkan dapat memberikan rekomendasi efektif untuk perbaikan fitur yang mendukung pertumbuhan sektor perikanan udang di Indonesia. Integrasi teknologi RAS dan Plasma FineBubble yang baik dapat mendorong sektor perikanan udang menuju pertumbuhan yang berkelanjutan dan berkontribusi pada target produksi dan ekspor yang meningkat., The challenges of inconsistent productivity and shrimp disease risk in vaname shrimp (Litopenaeus vannamei) farming in Indonesia prompted the need for optimization in RAS Plasma FineBubble's Mobile application, a key to monitoring and controlling system at BPIU2K. This research uses the Five Planes framework and Retrospective Think Aloud to design an effective user experience. Quantitative andqualitative data from stakeholders and experts of BPIU2K's fisheries experts were analyzed to measure user satisfaction and identify potential operational errors. The evaluation results showed that customizing features according to user needs can improve operational efficiency and shrimp health. This research is expected to provide effective recommendations for feature improvements that support the growth of the shrimp fisheries sector in Indonesia. A good integration of RAS and FineBubble Plasma technology can drive the shrimp fisheries sector towards sustainable growth and contribute to increased production and export targets.
Keyword: Fine Bubble, Five Planes, pengalaman pengguna, Retrospective Think  Aloud

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.
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