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: Evaluation of Influenza Antibody Titers in Serum and Egg Yolk of Layers Vaccinated with Influenza Vaccines.
Abstrak: Influenza belongs to the Orthomyxoviridae family which causes upper and lower respiratory tract infection. The aim of this study was to evaluate influenza-A specific antibody titers from serum and egg yolk of hens vaccinated with quadrivalent influenza vaccines. Three Hy-line Brown layers were vaccinated with quadrivalent influenza type A and B inactivated vaccines. Vaccination was carried out three times at a dose of 0.25 ml/chicken via the intramuscular route. The first vaccination was carried out at 24 weeks of age, then boosters were performed at 28 and 32 weeks of age. Serum and egg yolk were collected every week for 20 weeks since the first vaccination. Influenza A H3N2 and H1N1 antibody titers were determined using hemagglutination-inhibition (HI) test and agar-gel-precipitation (AGP) test. Influenza-A H3N2 and H1N1 specific antibodies were detected in both serum and egg yolk from the first to twenty weeks after the initial vaccination. Highest HI geometric mean titer (GMT) of H1N1 antibody reached 26.67 HIU at nine weeks post first vaccination (p.f.v), while H3N2 antibody reached 26 HIU at six weeks p.f.v. Our result showed that influenza antibodies can be produced in layers using quadrivalent vaccines and layer chickens are able to produce equivalent antibody levels for each influenza subtype.
Keyword: antibody, egg yolk, influenza, layer chickens, serum