Judul: Development of interactive media education training geminivirus controlling in red chili (Capsicum annum L.)
Abstrak: Chili pepper yellow leaf curl virus caused by Geminivirus in red chili is one of the most devastated diseases of chili peppers.This virus cause crop loses up to 20-100%. Therefore, farmers need to be assisted with information and provided with information sources to control this virus attack. One of the methods is to inform farmers about this virus is through an interactive media in an animation form. Animation can describe about virus characteristics, virus habitat, virus spread among the plants, the symptoms of virus attack and technique for controlling virus attack. The research method used multimedia development life cycle (MDLC) and animation production used software, like Adobe Flash, Adobe Premiere, Adobe Soundbooth, and Format Factory. The developed prototype of the animation system has been tested and used by users (by respondents selected consisting of students, farmers, and agricultural extention workers). From the testing it was shown that the system is claimed to be easy to use, easy to understand, and useful
Keyword: software, MDLC, animation, Geminivirus

Judul: Analisis Serangan Virus Gemini pada Cabai Merah (Capsicum annum L.) Berbasis Visual dengan Segmentasi Bayes
Abstrak: Kebutuhan cabai semakin meningkat dengan peningkatan jumlah penduduk. Salah satu kendala rendahnya produktivitas cabai disebabkan oleh infeksi virus yang disebut virus Gemini. Tanaman yang terinfeksi menunjukkan gejala berupa klorosis pada daun, daun keriting dan menguning. Infeksi virus berpotensi menurunkan hasil sebesar 20 – 100%. Melihat kondisi tersebut, maka diperlukan metode pemantauan dan evaluasi serangan virus yang baik untuk menentukan tindakan yang harus dilakukan. Tujuan dari penelitian ini adalah menganalisis lahan tanaman cabai merah yang terkena serangan virus. Pengambilan citra dilakukan melalui foto udara menggunakan multicopter, citra hasil pemotretan selanjutnya di analisis dengan program pengolah citra untuk mengevaluasi tingkat serangan virus Gemini yang terjadi di lahan. Metode segmentasi Bayes digunakan untuk menentukan tingkat serangan virus pada tanaman individual dengan masukan 3 dimensi berupa komponen warna (R, G, B) dan 4 target segmentasi yaitu tanaman sehat, terserang virus ringan, terserang virus sedang, dan terserang virus akut. Hasil training menggunakan 40 sampel, diperoleh nilai akurasi 100%. Uji coba validasi tanaman individual dengan sampel 240 tanaman untuk 4 kelas diperoleh nilai akurasi 64.24%, validasi dengan target 2 kelas 91.25%, validasi tingkat serangan dengan satuan lahan diperoleh ketelitian 95.58%., Chili demand in Indonesia has increased in line with increases of population. One of the constraints of low productivity of chili caused by a viral infection called Gemini virus. Infected plants showed symptoms of chlorosis on leaves, leaf curling and yellowing. Viral infections potentially reduce yields by 20-100%. Due to these conditions, then necessary good methods of monitoring and evaluation virus attack to determine what actions to take. The purpose of this study is to analyze the chili plants field were exposed by virus. Images taken through aerial photography via multicopter, the image captured in the subsequent analysis with image processing program to evaluate the level of Gemini virus attacks that occurred on field. Bayesian segmentation method is used to determine the level of virus attacks on individual plants with a 3-dimensional input color components (R, G, B) and 4 segmentation target i.e. healthy plants, mild virus attacks, middle virus attacks, and acute virus attacks. Training results using 40 samples, obtained 100% accuracy rate. Validation test of individual plants with 240 plant samples for 4 classes obtained 64.24% accuracy rate, validation test of individual plants for 2 target class of attack obtained 91.25%, validation test of total fields attack obtained 95.58% accuracy.
Keyword: cabai, pengolahan gambar, segmentasi Bayes, virus Gemini

Judul: Sintesis dan Pencirian Natrium Titanat (Na2Ti2O4(OH)2) Berbahan Dasar Titanium Dioksida
Abstrak: TiO2 can be utilized as basic material for synthesis of sodium titanate (Na2Ti2O4(OH)2). This research was purposed to synthesize and characterize sodium titanate from TiO2 rutile powder as a basic material. Sodium titanate was synthesized by hydrothermal process at temperature 130 °C by mixing TiO2 rutile powder with 5 M and 10 M NaOH solution, then each was calcinated at temperature 700 °C. The energy dispersive X-ray analysis showed that sodium titanate has been successfully synthesized. This result was also supported by functional group analysis with Fourier transform infrared (FTIR) spectrofotometer showing the existence of Ti-O-Na vibration band at 989.42 cm-1. The formation of sodium titanate was depend on the reaction condition such as temperature, reaction time, and NaOH concentration. Scanning electron microscope image indicated that sodium titanate synthesized at 130 °C in 20 hours reaction time with 10 M NaOH had crystal size of 99.37 nm.
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