Judul: I-PEDIA: Aplikasi Mobile untuk Identifikasi Penyakit Tanaman Padi dengan Fuzzy Entropy dan Probabilistic Neural Network
Abstrak: This research developed a mobile application for paddy plant disease identification system using fuzzy entropy and classifier probabilistic neural network (PNN) that runs on mobile. Paddy plant diseases is one of the problems on increasing paddy production. Fuzzy entropy is used for image feature extraction. PNN is used because training PNN is fast. Training data and testing data divided by k-fold cross validation with a k value of 5. Before training data and testing data are extracted, the images are enhanced using the Laplacian filter. The accuracy of paddy diseases identification without the Laplacian filter is 91.46% while accuracy of paddy diseases identification using the Laplacian filter is 90.55%.
Keyword: k-fold cross validation, paddy plant disease, probabilistic neural network, fuzzy entropy

Judul: Aplikasi Mobile Identifikasi Penyakit Daun Kubis dengan Fast Fourier Transform dan Probabilistic Neural Network
Abstrak: Disease in cabbage leaves can lead to a decrease in the quality and quantity of crop yields or crop failure. The purpose of this research is to develop a mobile application by applying the Fast Fourier Transform feature extraction technique and Probabilistic Neural Network classification technique to identify the cabbage leaf disease. This mobile application runs on android platform. It is found that the accuracy of FFT feature extraction and PNN classification with bias 0.03 is 58.33%. The obtained accuracy is still not satisfactory since there are some errors in identifying the cabbage leaf disease
Keyword: Probabilistic Neural Network, Fast Fourier Transform, Cabbage leaf disease

Judul: Sintesis dan Karakterisasi Stronsium Titanat dengan Variasi Konsentrasi Pendadah Bismuth (III) Asetat (Bi(CH3COO)3)
Abstrak: Telah berhasil dilakukan Sintesis Stronsium Titanat (SrTiO3) didadah Bismuth Asetat (Bi(CH3COO)3) dengan variasi konsentrasi pendadah 0%; 0,5%; 1%; dan 1,5%. Larutan konsentrasi ditetesi diatas substrat silikon (Si 100) tipe-P dengan metode chemical solution deposition (CSD) dan teknik spin coating. Film yang telah jadi dilanjutkan proses annealing dengan kenaikan suhu 1,67oC/menit dan ditahan pada suhu 850oC selama 8 jam lalu didinginkan pada suhu kamar selama 12 jam. Proses selanjutnya film ditimbang kemudian dilanjutkan dengan metode volumetrik untuk mencari ketebalan film tipis. Ketebalan yang diperoleh yaitu 3,904725 μm, 4,295197 μm, 4,68567 μm, 5,076142 μm. Hasil analisis sifat optik dengan fungsi Kubelka-Munk untuk direct transition didapatkan band gap 3,463686 - 3,566327 eV. Uji XRD yang dianalisis menggunakan Metode Cramer-Cohen menghasilkan parameter kisi (a=b=c) yaitu 3,835 Å, 3,837 Å, 3,909 Å, 3,913 Å dengan struktur kristal kubus., Has been successfully Synthesis of Strontium Titanate (SrTiO3) in Bismuth Asetat (Bi(CH3COO)3) with variant concentrations of 0%; 0.5%; 1%; and 1.5%. The concentrated solution was dripped onto a P-type silicon (Si 100) substrate using the chemical solution deposition (CSD) method and spin coating technique. The film was continued annealing process with an increase in temperature of 1.67oC/minute and held at 850oC for 8 hours and then cooled at room temperature for 12 hours. The next process is that the film is weighed and then proceed with the volumetric method to find the thickness of the thin film. The thicknesses obtained were 3.904725 μm, 4.295197 μm, 4.68567 μm, 5.076142 μm. The results of the analysis of optical properties with the Kubelka-Munk function for the direct transition obtained a band gap of 3.463686 - 3.566327 eV. The XRD test analyzed using the Cramer-Cohen method yielded lattice parameter (a=b=c) namely 3.835 Å, 3.837 Å, 3.909 Å, 3.913 Å with a cubic crystal structure.
Keyword: CSD, energy band gap, lattice parameter, spin coating, SrTiO3