Judul: Sistem pakar pemilihan lokasi penanaman kopi di Provinsi Lampung
Abstrak: To increase the income of coffee farmers in Lampung, they should be assisted with additional information that helped them cultivating in a more economical and more wisely to reduce costs and produce more yield. Farmers need land selection and preparation techniques of land that their best to not get rid of excess funds. In the selection of field sites, there are 8 (eight) parameters that simulated for 5 (five) years with the help of Bayes Methods. Coffee plant has 23 requirements with regard to land suitability. This study discusses the technique of site selection of the most economical choice of several locations with Model Base Management System and assist farmers to prepare land that has been selected to match with requirement of coffee plants grown with Rule-Based System. Both systems are supported with Data Base Management System. All three systems are handled by Central Processing System. This system using Certainty Factor for processing uncertainty data. Field sites for the research are located in Kabupaten Pringsewu, Kabupaten Tanggamus, and Kabupaten Lampung Utara.
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Judul: Analysis of Robusta Coffee (Coffea Canephora) Productivity Using An Agricultural Simulation Model (Case Study: West Lampung)
Abstrak: Kabupaten Lampung Barat merupakan salah satu sentra perkebunan kopi nasional dengan areal perkebunan tercatat seluas 60,38 ha. Penelitian ini bertujuan untuk mengembangkan model simulasi tanaman kopi untuk memperkirakan produktivitas, serta mengkaji pengaruh perubahan iklim berupa suhu udara terhadap produktivitas tanaman kopi. Penelitian dilakukan dengan mengembangkan model simulasi tanaman tahunan yang terbagi menjadi tiga sub-model, yaitu pertumbuhan, perkembangan, dan neraca air serta melakukan validasi dan kalibrasi. Nilai koefisien determinasi yang didapatkan dari perbandingan produktivitas lapang dan hasil model adalah sebesar 0,96. Ini berarti bahwa nilai produktivitas yang dihasilkan dari output model semakin mendekati nilai pengamatan. Sementara itu, nilai galat error yang dihasilkan di Kabupaten Lampung Barat adalah 1,04 %, 1,05 %, dan 1,03 % untuk tahun 2020, 2021, dan 2022 berturut-turut. Variabel iklim berupa suhu udara merupakan faktor utama yang memengaruhi produktivitas tanaman kopi secara signifikan. Sementara itu, terdapat hubungan negatif antara kenaikan suhu rata-rata dan produktivitas tanaman kopi., West Lampung Regency is one of the national coffee plantation centers with a recorded plantation area of 60,38 hectares. This research aims to develop a coffee plant simulation model to estimate productivity and to examine the impact of climate change, specifically air temperature, on coffee plant productivity. The study involves developing a perennial plant simulation model divided into three sub-models, growth, development, and water balance, followed by validation and calibration. The coefficient of determination obtained from the comparison of field productivity and model results is 0,96. This indicates that the productivity values generated by the model output are increasingly close to the observed values. Meanwhile, the error rates in West Lampung Regency are 1,04 %, 1,05 %, and 1,03 % for the years 2020, 2021, and 2022, respectively. Climate variables, such as air temperature, are the main factors significantly affecting coffee plant productivity. There is a negative relationship between the increase in average temperature and coffee plant productivity.
Keyword: Coffee, crop simulation model, productivity estimation

Judul: Durability of Specific Immunoglobulin (Ig) Y Againts Influenza and Covid-19 in Sunscreen
Abstrak: The benefit of specific immunoglobulin Y (Ig Y) as an active ingredient in personal care products such as sunscreen has not been properly studied. Our study aims to evaluate the reliability of specific IgY against influenza and the COVID-19 virus in a sample sunscreen product. Specific IgY influenza and COVID-19 viruses were inserted in the sample sunscreen at two concentrations of 0.1% and 0.25%. Three treatments were observed: control (C) sunscreen without IgY, treatment 1 (T1) sunscreen with 0.1% IgY, and treatment 2 (T2) sunscreen with 0.25% IgY. Organoleptic observations were carried out to monitor changes in aroma, color, and texture, and sunscreen sampling was done every week for 6 weeks. The durability of IgY was evaluated using an enzyme-linked immunosorbent assay (ELISA) and a neutralization assay. Organoleptic observation from weeks 1 to 6 showed consistency in its aroma, color, and texture. Enzyme-linked immunosorbent assay and neutralization assay (NA) results of the T1 and T2 groups showed negative results except for sample T1 at week 5, which showed a positive result in the Influenza A ELISA. Based on the results, it seems that IgY concentrations of 0.1% or 0.25% were not optimal. However, this negative result might be due to low concentration of the IgY and the presence of beeswax, which inhibits IgY and causes it to dissolve in distilled water, thus preventing it from being detected in the assay.
Keyword: Immunoglobulin Y, Sunscreen, Influenza, COVID-19, Biological Activity