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: Pemanfaatan Sistem Pakar untuk Menentukan Varietas Unggul Tanaman Nilam
Abstrak: Patchouli is a producer of essential oils that has a higher export value. The selection of good and excellent patchouli plant seed is necessary in order to produce good quality of essential oils. This research assesses superiority of patchouli plant seeds using three known superior varieties as a reference. The varieties are tapak tuan, lhokseumawe, and sidikalang variety which are derived from the aceh varieties. To this purpose, we develop an expert system which is aimed to assist nilam developers in selecting good seeds and patchouli superior plants. During the process, morphological characteristics of patchouli plant varieties result in about 108 rules. Further examination determined only 27 rules are applicable to determine its superiority while the remaining rules are inapplicable. The expert system was assessed using 30 patchouli plant seeds to verify system correctness. Note that 30 plant seeds being assessed was known as superior variety prior to its assessment. Assessment results recognized that 93% of the plant seed is categorized as superior type. Additional assessment using 50 unknown patchouli variety was also carried out. The results of the assessment by the expert system concluded that 84% of the patchouli plants were determined as superior patchouli plants, and results from the expert assessment concluded that 86% are superior patchouli plants. In conclusion, the expert system developed is able to determine patchouli plant seed superiority based on its morphology with relatively good accuracy.
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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