Judul: Analisa kelayakan usahatani sukun (Studi kasus Desa Ringinsari, Kec. Kandat Kab. Kediri, Jawa Timur)
Abstrak: Berdasarkan pengalaman sejarah Indonesia, pengadaan pangan merupakan masalah yang sangat strategis karena menyangkut kepentingan masyarakat luas. Usaha-usaha peningkatan produksi bahan pangan ini terus di pacu dengan berbagai paket teknologi yang memang relatif berhasil. Namun sering kali pengaruh alam yang tidak dapat di kendalikan atau bencana alam menyebabkan terjadinya penurunan produksi yang tajam, paceklik yang berkepanjangan dan Berawanan pangan.
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Judul: Analisis pendapatan dan faktor-faktor produksi usahatani komoditi jagung hibrida dan bersari bebas (Lokal) (Kasus: desa Saguling, kecamatan Batujajar, kabupaten Bandung, provinsi Jawa Barat)
Abstrak: Pangan merupakan kebutuhan dasar yang paling esensial bagi manusia untuk mempertahankan kehidupan. Sebagai makhluk hidup, tanpa pangan manusia tidak mungkin dapat bertahan dan melangsungkan kehidupannya. Komoditi tanaman pangan dibagi menjadi dua kelompok komoditi yaitu komoditi pangan utama dan komoditi pangan sekunder. Perkembangan kebutuhan pangan nasional pada periode tahun 2000-2006, menunjukkan masih terjadi kekurangan akan stok nasional baik dari komoditi pangan utama maupun kelompok pangan sekunder. Berdasarkan kondisi tersebut, pemerintah mengambil langkah antisipatif dalam mensiasati kondisi yang terjadi karena apabila dibiarkan akan menyebabkan Indonesia masuk kedalam kondisi krisis pangan.
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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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