Judul: Klasifikasi Protein Family Menggunakan Algoritme Probabilistic Neural Network (PNN)
Abstrak: Proteins are composed of series and combination of 20 - amino acid. Each Protein has the composition of the amino - acid sequence which is different one from another. The classification of Protein is contributed as a guide to determine the structure, activity and role in the metabolism of organism. Since necessary to classifying proteins into appropriate classes, new sequences needed. Since the number of sequences that appear, new method of classifying proteins into appropriate classes. The purpose of this study is to apply the algorithm Probabilistic Neural Network ( PNN ) with four bias to classify the protein family. There are three classes of protein family data, namely class 1 - cysPrx_C , 4HBT and ABC_Tran. Each class is taken as 100 Data.
Keyword: Bogor Agricultural University (IPB), Protein Family., Feature Extraction Markov Chain, Probabilistic Neural Network (PNN), classification

Judul: Klasifikasi Protein Family Menggunakan Metode Rantai Markov
Abstrak: Proteins are large biological molecules that consist of one or more chains of 20 amino acids sequences. Proteins have various functions such as catalyzing metabolic reactions, replicating DNA, and transporting molecules. Many new protein sequences have been found. Therefore, a new method is required to classify proteins which have similar amino acids sequence, structure and function into the same class. The aim of this research is to apply Markov chain concept for protein family classification based on amino acid sequences. Protein data samples are obtained from Pfam protein family database website. Samples are taken from three different protein family classes, namely: 1-cysPrx_C, 4HBT and ABC_Tran, 100 data samples each. This research utilizes two different extraction methods: first order and second order Markov chain. First order indicates that the data sequence stored in the transition matrix is every two adjacent sequences, while the second order indicates that the data sequence stored in the transition matrix is every two sequences that are intermittent twice. The results show that the first order method gives 96% as its best accuracy, whereas the second order method gives 89.33% as its best accuracy
Keyword: protein, classification,, Markov chain

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4