Judul: Implementation of Blockchain Technology in Transaction Recording for Carbon Trading in the Electricity Sector
Abstrak: Perdagangan karbon telah menjadi salah satu solusi dalam mengurangi emisi gas rumah kaca. Namun, dalam pelaksanaannya masih terdapat permasalahan mengenai pencatatan, validitas, dan pengawasan transaksi. Teknologi blockchain diusulkan menjadi solusi dalam mengatasi permasalahan tersebut. Studi ini mengembangkan sistem blockchain untuk mencatat transaksi perdagangan karbon. Melalui analisis kasus dan perancangan sistem, ditetapkan fitur pada sistem untuk mengatasi permasalahan tersebut. Implementasi sistem dilakukan dengan mengintegrasikan teknologi blockchain dengan basis data yang ada. Pengujian sistem dilakukan untuk melakukan validasi keamanan dan pemantauan transaksi. Hasil pengujian menunjukkan bahwa sistem mampu mencatat transaksi secara efektif dan dapat mengatasi permasalahan terkait pencatatan, validitas, dan pengawasan. Namun, pengembangan lebih lanjut diperlukan untuk meningkatkan efisiensi sistem. Carbon trading has become one of the solutions to reduce greenhouse gas emissions. However, there are still issues regarding transaction recording, validity, and supervision in its implementation. Blockchain technology is proposed as a solution to address these issues. This study develops a blockchain system to record carbon trading transactions. Through case analysis and system design, features are established to tackle these problems. The system implementation integrates blockchain technology with existing databases. System testing is conducted to validate security and transaction monitoring. The test results show that the system can effectively record transactions and address issues related to recording, validity, and supervision. However, further development is needed to improve system efficiency., Carbon trading has become one of the solutions to reduce greenhouse gas emissions. However, there are still issues regarding transaction recording, validity, and supervision in its implementation. Blockchain technology is proposed as a solution to address these issues. This study develops a blockchain system to record carbon trading transactions. Through case analysis and system design, features are established to tackle these problems. The system implementation integrates blockchain technology with existing databases. System testing is conducted to validate security and transaction monitoring. The test results show that the system can effectively record transactions and address issues related to recording, validity, and supervision. However, further development is needed to improve system efficiency
Keyword: blockchain, perdagangan karbon, pencatatan transaksi, validitas data, pengawasan transaksi, carbon trading, transaction recording, data validity, transaction supervision

Judul: Testing Usability of Blockchain Technology Chili Distribution Transaction Recording System with Cognitive Walkthrough
Abstrak: Sistem pencatatan transaksi distribusi cabai teknologi blockchain merupakan suatu aplikasi berbasis web yang digunakan untuk menjamin transparansi distribusi cabai. Pengujian usabilitas ini dilakukan dengan menganalisis penggunaan antarmuka aplikasi dengan metode cognitive walkthrough. Responden terdiri dari empat aktor produsen, pengepul, pedagang grosir, dan pedagang eceran cabai. Berdasarkan hasil rata-rata waktu yang dibutuhkan untuk menyelesaikan seluruh skenario tugas, aktor produsen memperoleh rata rata waktu sebesar 240,3 detik, aktor pengepul memperoleh ratarata waktu sebesar 274,7 detik, aktor pedagang grosir memperoleh rata-rata waktu sebesar 227,0 detik, dan aktor keempat atau pedagang eceran memperoleh rata-rata waktu sebesar 196,7 detik. Walaupun demikian ada beberapa masukan dari responden tentang sistem aplikasi seperti loading yang terkadang lama dan beberapa responden menyarankan agar sistem dapat dijalankan di smartphone.
Keyword: blockchain, cognitive walkthrough, smartphone, Transparansi, usabilitas

Judul: Purifikasi Dan Karakterisasi Imunoglobulin Y (IgY) Pada Telur Ayam Kampung
Abstrak: The objective of this research was to purified and characterized yolk immunoglobulin (IgY) from Indonesian native chicken eggs. Fourty eggs were collected from Cibanteng, Ciampea, Cinangneng, and Darmaga. IgY from egg yolk were puri$ed with Water Soluble Fraction (WSF) method combinated by 12% PEG 6000 and 40% Amonium sulpha methodt. IgY molecular weight was established by SDS-PAGE and the concentration was determinated by UV specfrophotometer. The result show that average IgY concentration from native chicken eggs was 7.86 mngml. Molecular weight of native chicken IgY was 180 and I70 kDa..
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