Judul: Sistem Pakar Identifikasi Varietas Anthurium Berdasarkan Daun, Spathe dan Spadix
Abstrak: Anthurium is a plant that has many varieties, both hybrids and species. Anthurium is itself divided into two types, such as : Anthurium of flowers and Anthurium of leaves. Each type has a good diversity of flowers and leaves. With so many diversities possessed by this plant, it is difficult to identify directly. Instead, we must make some observations to identity the type of the plant. This research created an expert system to identify varieties of Anthurium based on leaf, spathe and spadix. In the input process, the explanation given by the system includes the parameters of morphological traits in plants and from the parameters that entered will get results in accordance with the process of reasoning. In the output process, the user can find varieties of Anthurium, then the user can access more deeply knowledge about the varieties of Anthurium so that it might be expected the final results obtained can produce near expert conclusion. In this system it is obtained 5 of the fuzzy parameters of Anthurium. The results of the 5 combination of parameters results in 9 fuzzy rules that characterize 10 of the varieties of Anthurium and 4 rules that do not characterize 10 of the varieties of Anthurium. After testing the system with the expert evaluation and adjustment, 44 of the test data are entered. The system is able to generate 36 test data according to the experts and 8 test data that is inconsistent with the experts. As a result, the accuracy obtained on the system for 44 Anthurium data is 81.81%. Hence, it can be concluded that the expert system to identify varieties of Anthurium based on leaf, spathe and spadix performs an experted
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Judul: Sistem Pakar Identifikasi Varietas Tanaman Kunyit
Abstrak: Along with the increasing development of genetic plant resources, the number of accessions of the turmeric plant is also increasing, making it difficult to differentiate between varieties, due to similar appeareances. This reserach aims to develop on expert system to identify the varieties of turmeric (Turina-1, Turina2, and Turina-3). Knowledge acquisition for building the expert system is performed in conjunction with an expert from the Indonesia Spices and Medicinal Research Institute, Drs. Cheppy Syukur. The knowledge acquisition process resulted in 13 input variables to describe a variety. The input inference process divides these 13 variables into two types: fuzzy and non-fuzzy. The non-fuzzy variables are: color of flowers, the base of leaf, and the meat colors the rihizome which are used to decide wheter the input description represents a Turina-1, Turina-2, Turina-3 variety or a nonvariety. The remaining 10 variables fuzzy variables are: number of flowers per stem, plant height, number of tillers, leaf length, leaf width, rhizome weight per hill, number of parent rhizome, the number of primary roots, secondary roots and the levels of curcuma, which are used to determined whether the input description represents a Turina-1, Turina-2 or Turina-3 variety, using the Mamdani method for Fuzzy Inference System (FIS). In the testing phase, we use 100 data, which are already labeled according to the decision by the expert. The result shows that the system is able to correctly identify 89 of the input data.
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Judul: Pembuatan Film Tipis Lithium Niobat (LiNbO3) Menggunakan Metode Chemical Solution Deposition (CSD) dengan Variasi Kecepatan Putar (Rpm).
Abstrak: Film tipis merupakan salah satu aspek yang mendapat perhatian sangat besar dalam bidang material, karena film tipis merupakan material menarik yang memiliki sifat optik yang sangat tergantung pada konstanta dielektrik, indeks bias, dan energi gap. Lithium Niobat (LiNbO3 ) dapat digunakan sebagai pelapis pada film tipis karena memiliki sifat piezoelektrik, electrooptical, pyroelectrical dan photorefractive yang sangat baik. Film tipis Lithium Niobat (LiNbO3 ) ditumbuhkan menggunakan metode Chemical Solution Deposition (CSD) dengan variasi kecepatan 3500 rpm, 5000 rpm, 6500 rpm, dan 8000 rpm. Metode ini memiliki keunggulan dapat mengontrol stokiometri film tipis dengan kualitas yang baik, prosedur yang mudah dan membutukan biaya yang relatif murah. Energi band gap yang dihasilkan dari film tipis Lithium Niobat (LiNbO3) berkisar antara rentang 2.1 eV – 2.8 eV dengan indeks bias berada pada rentang 2.18-3.2. Film tipis LiNbO3 memiliki parameter kisi a=b=5.54Ǻ dan c = 16.35 Ǻ. Struktur morfologi film tipis adalah permukaan yang homogen dan ukuran kristal berada pada rentang 0.417 μm – 0.680 μm.
Keyword: sifat optik, litium niobat, chemical solution deposition, kecepatan putar