Judul: User Interface Design of Seed Laboratory Testing Service Information System
Abstrak: Perkembangan benih tanaman pangan dan hortikultura mendukung adanya sistem ketahanan pangan. Menghadapi hal ini, dilakukan pengujian laboratorium benih pada Balai Besar PPMB-TPH untuk mengetahui mutu benih. Namun dalam pelayanannya, pemanfaatan teknologi informasi dan komunikasi pada Balai Besar PPMB-TPH belum optimal. Oleh karena itu, penelitian ini merancang sistem informasi yang dapat dijadikan sebagai panduan untuk membangun pelayanan pada Balai Besar PPMB-TPH. Hasil dari penelitian ini adalah perancangan user interface dari sistem informasi pelayanan pada Balai Besar PPMB-TPH hingga tahap lowfidelity dengan memperhatikan aspek usability-nya. Metode yang digunakan dalam penelitian ini adalah User Centered Design (UCD). Berdasarkan pengujian yang dilakukan kepada pengguna, didapatkan hasil akhir sebesar 89,375 menggunakan metode System Usability Scale (SUS) yang dapat dijadikan panduan sistem informasi pelayanan Balai Besar PPMB-TPH., The development of seeds for food crops and horticulture supports a food security system. Facing this, laboratory testing of seeds was carried out at the Balai Besar PPMB-TPH to determine the quality of the seeds. However, in its service, the use of information and communication technology at the Balai Besar PPMB-TPH is not optimal. Therefore, this study designed an information system that can be used as a guide for building services at the Balai Besar PPMB-TPH. The results of this study are the design of the user interface of the service information system at the Balai Besar PPMB-TPH to the low-fidelity stage by paying attention to its usability aspects. The method used in this research is User Centered Design (UCD). Based on tests carried out on users, the final result was 89.375 using the System Usability Scale (SUS) method which can be used as a guide for the information system service for Balai Besar PPMB-TPH.
Keyword: information system, seed laboratory testing, user centered design, user interface

Judul: User Interface Design for Horticultural Inventory Management Application at Al-Ittifaq Islamic Boarding School Cooperative Bandung
Abstrak: Pesantren Al-Ittifaq Bandung merupakan salah satu pesantren yang telah mewujudkan kemandiriannya dengan mengembangkan sektor perekonomian, agribisnis, dan teknologi. Hal ini dibuktikan dari perkembangan pesat Koperasi Pondok Pesantren Al-Ittifaq saat ini. Akan tetapi, sistem manajemen inventori alur masuk dan keluar barang di Koperasi Pondok Pesantren Al-Ittifaq masih dikelola secara manual menggunakan Excel dan Google Sheet. Oleh karena itu, dilakukan penelitian untuk perancangan user interface aplikasi inventory management hortikultura hingga tahap high-fidelity prototype dengan memperhatikan usability bagi penggunanya. Metode yang digunakan pada penelitian ini yaitu metode User Centered Design dengan framework RABBIT process sebanyak satu kali iterasi. Pengujian dilakukan kepada tiga pengguna yaitu sekretaris, bendahara, dan manager purchasing Koperasi Pondok Pesantren Al-Ittifaq. Hasil pengujian menghasilkan rata-rata skor System Usability Scale sebesar 71.67 dengan kategori acceptable berdasarkan acceptability ranges. Berdasarkan hasil pengujian tersebut, maka dapat disimpulkan bahwa user interface yang dikembangkan telah memenuhi usability bagi penggunanya., Al-Ittifaq Bandung Islamic Boarding School is one of the Islamic boarding schools that realizes its independence by developing the economic, agribusiness, and technology sectors. The rapid development of the Al-Ittifaq Islamic Boarding School cooperative proves this. However, the inventory management system for goods entering and exiting the cooperative is still managed manually using Excel and Google Sheets. Therefore, research was carried out to design the user interface of an application for horticultural inventory management up to the high-fidelity prototype stage by paying attention to usability for its users. The method used in this research is the User Centered Design method with the RABBIT process framework in one iteration. Testing is carried out on three users, namely the secretary, treasurer, and purchasing manager of the Al-Ittifaq Islamic Boarding School cooperative. The test results produced an average System Usability Scale score of 71.67 with an acceptable category based on the acceptability range. Based on the test results, it can concluded that the user interface developed has fulfilled its usefulness for its users.
Keyword: inventory management, user-centered design, user interface

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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