Judul: Pelaksanaan Usahatani Model (Model Farm ) di Wilayah Das Citanduy dan Evaluasi Ekonominya
Abstrak: Perencanaan usahatani model, ditinjau dari rencana lokasi dan layanannya, memiliki efektivitas yang cukup tinggi meskipun demikian, terdapat kelemahan dalam hal kriteria penentuan lokasi yang tidak memiliki prioritas. Penyaluran layanan usahatani model masih menghadapi masalah ketidak tepatan waktu penyaluran dengan kehutuhan petani. Faktor-faktor yang menyebabkannya ialah masalah birokrasi dan transportasi.
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Judul: Analisis Pendapatan Usaha Tani Petani Peserta Model Farm Dan NON Model Farm Proyek Citanduy II : Studi Kasus Di Desa Panyutran Kecamatan Pada Herang Kabupaten Ciamis
Abstrak: Tanah, air dan hutan merupakan unsur-unsur penting sektor pertanian yang perlu dipertahankan kelestariannya. Daerah Aliran sungai merupakan daerah potensial terjadi- nya penurunan kualitas lahan serta erosi yang dapat berakibat banjir dan terbentuknya sedimentasi. Model Farm adalah salah satu bentuk penerapan teknologi lahan kering di daerah Hulu DAS Citanduy, yang bertujuan untuk menanggulangi masalah erosi dan meningkatkan pendapatan petani di daerah hulu DAS Citanduy. Tujuan penelitian ini adalah untuk melihat secara langsung kegiatan usahatani di lahan model farm. Secara khusus penelitian praktek lapang ini juga bertujuan untuk melihat pengaruh model farm terhadap penyerapan tenaga kerja, serta melihat tingkat pendapatan petani Model farm dan non model farm. Sebagai pelengkap akan di analisis pula pengaruh tingkat perhatian petani kepada Model farm terhadap keberhasilan Model Farm.
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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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