Judul: Sistem Pakar Identifikasi Serangga Hama pada Gudang Penyimpanan Serealia Berbasis Android
Abstrak: Serangga hama gudang merupakan masalah penting yang dihadapi dalam kegiatan pergudangan. serangga hama sangat berpengaruh terhadap penurunan kualitas bahan simpan. Informasi mengenai serangga hama gudang perlu diketahui supaya perawatan gudang dapat dilakukan dengan tepat. Sehingga diperlukan sistem pakar yang dapat mewakili kemampuan pakar dalam mengidentifikasi jenis serangga hama yang menyerang komoditas. Penelitian ini bertujuan untuk membuat sistem pakar offline berbasis Android yang mampu mengidentifikasi jenis serangga dan dapat memberikan informasi-informasi serangga hama mulai dari taksonomi, nama umum, deskripsi, ekologi, distribusi, pencegahan, dan pengendaliannya. Metode case based reasoning digunakan sebagai metode inferensi dengan menggunakan algoritma nearest neighbor. Sistem pakar kemudian diuji kepada beberapa pengguna, yaitu mahasiswa, peneliti, dan praktisi gudang. Sistem dapat berjalan dengan baik dan membantu dalam mengidentifikasi jenis serangga hama gudang.
Keyword: Android, case based reasoning, identifikasi, nearest neighbor, serangga hama gudang

Judul: Sistem Pakar Berbasis Android Untuk Identifikasi Jenis Gulma Pada Budidaya Tanaman Kedelai
Abstrak: Salah satu kendala yang sering terjadi pada kegiatan budidaya kedelai adalah masalah gulma yang berpotensi menurunkan produktivitas. Sehingga diperlukan sistem pakar yang dapat mewakili pengetahuan mengenai identifikasi jenis gulma agar petani dapat memutuskan pengendalian yang tepat. Penelitian ini bertujuan membuat sistem pakar berbasis android offline adalah untuk identifikasi jenis gulma pada budidaya tanaman kedelai berdasarkan informasi morfologi dan menentukan saran pengendalian gulma yang tepat. Metode forward chaining digunakan sebagai pengembangan mesin inferensi yang digunakan utuk memutuskan kesimpulan sistem pakar. Sistem pakar identifikasi jenis gulma yang dibangun berisi informasi jenis gulma, informasi pengelompokan gulma, informasi herbisida, takaran herbisida, dan galeri kegiatan pengendalian gulma. Ukuran aplikasi sebesar 6.97 Megabytes (Mb) dan berjalan tanpa koneksi internet. Pengujian aplikasi dapat berjalan dengan baik dengan akurasi identifikasi jenis gulma mencapai 87.5%.
Keyword: sistem pakar, jenis gulma, identifikasi, android, forward chaining

Judul: Enhancement of photon absorbtion on BaxSr1-xTiO3 thin films semiconductor using photonic crystals.
Abstrak: In this research, has been conducted BaxSr1-xTiO3 (BST) thin films manufacturing for mole fraction x = 0.25, 0.35, 0.45, and 0.55; and concentration of 1 molar using chemical solution depositon (CSD) method. The materials, which are used in this research, are barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%], titanium isopropoxide [Ti(C12O4H28), 97.999%], gallium trioxide [Ga2O3], 2-methoxyethanol [H3COOCH2CH2OH, 99%] and 1 x 1 cm of transparent conductive oxide (TCO) glass as substrate. Two BST thin films are made that for BST thin films which are doped by 10% galium (BGST) as p-type layer and pure BST solution as n-type. BST solution is made by reacting barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%] and titanium isopropoxide [Ti(C12O4H28)] into 2-methoxyethanol solvent [H3COOCH2CH2OH, 99%] in accordance with mass gram for each x value. While, BGST solution is made in the same way as BST solution, plus adding gallium at 10% of the mass of BST. Once all materials are reacted, then vibrated using ultrasonic for 90 minutes, and followed by coating BGST / BST on the TCO substrate. Once the layer is formed, then annealed for 15 hours at temperature of 500 °C with increasing rate of 1.67 oC/minute. Characterizations of BST thin films with or without photonic crystals include the absorbance and transmittance in the visible light spectrum, as well as the electrical photoconductivity characterizations. From BST thin films without photonic crystals indicate that our thin films have light absorption area on almost the entire range of the visible light spectrum even to the infrared range with absorption value over than 67.6%, in addition, it can be seen that the maximum absorbance of BST thin films for all mole fractions lie in blue to green light spectrum region, 457 nm ≤ λ ≤ 570 nm and the minimum in yellow to red light spectrum region, 570 nm ≤ λ ≤ 678 nm. The largest absorbance is found at x = 0.25 with average absorbance value of 92.04% and maximum and minimum absorbance peaks at wavelength of 500.89 and 657.72 nm, respectively. At x = 0.35, average absorbance value decreased to 83.55% with maximum and minimum peaks at 505.73 and 613.68 nm, respectively. Then increased to 91.16% at x = 0.45 with maximum and minimum peaks at 506.04 and 618.56 nm, respectively. At x = 0.55, average absorbance value decreased to 80.12% with maximum and minimum peaks at 507.85 and 608.79 nm, respectively. Moreover, it can be seen that the addition of barium mole fraction leads to wider maximum absorbance or minimum transmittance peaks and narrower minimum absorbance or maximum transmittance peaks in the same range of the green and blue & red light spectrums, respectively. BST thin films with photonic crystals show increasing in absorption for all x values in the range of 3.04 into 13.33%. At x = 0.25, average absorbance percentage increased 3.96% from 92.4 into 95.68%, for x = 0.35 average percentage increased 7.07% into 89.45 from 83.55%. Furthermore, average absorbance of BST thin films at x = 0.45 increased 3.04% from 91.16 into 93.93% and x = 0.55 has
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