Judul: Manfaat-Biaya Usaha Budidaya Perikanan Jaring  Apung di Waduk Saguling, Jawa Barat
Abstrak: Penelitian ini bertujuan untuk mengetahui keragaan manfaat dan biaya sebagai dasar untuk melihat kelayakan dari usaha budidaya ikan KJA di Waduk Saguling menurut skala usaha. Metode yang digunakan dalam mengumpulkan data adalah metode survey. Responden sasaran adalah para petani ikan KJA di Waduk Saguling dan dinas instansi terkait. Teknik pengumpulan data adalah teknik wawancara langsung dengan menggunakan kuestioner.
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Judul: Analisis Produktivitas Usaha Budidaya Ikan dalam Keramba Jaring Apung Di Waduk Jatiluhur, Kabupaten Putwakarta, Propinsi Jawa Barat
Abstrak: Usaha perikanan yang dilakukan di Kecamatan Jatiluhur dapat digolongkan menjadi usaha perikanan budidaya dan perikanan tangkap. Usaha pemanfaatan sumberdaya perairan umum bagi usaha budidaya ikan yang sekarang ini berkembang pesat adalah usaha budidaya dalam KIA. Jenis ikan terbanyak yang dibudidayakan petani ikan di Waduk Jatiluhur adalah Ikan Mas dan Ikan Nila. Para petani ikan dalam pengusahaan jaring apung terbagi menjadi dua yaitu rnonokultur dan polikultur. Hasil perhitungan analisis usaha budidaya ikan dalam KJA menunjukkan kedua usaha menguntungkan. Pendapatan rata-rata jenis usaha monokultur adalah Rp 159.233.246,OO dan jenis usaha polikultur sebesar Rp 253.804.786,OO sehingga didapat R/C untuk usaha monokultur sebesar 1,35 sedangkan R/C untuk jenis usaha polikultur sebesar 1,70. Produktivitas rata-rata jenis usaha polikultur lebih besar dibandingkan dengan jenis usaha monokultur. Hal mendasar yang menyebabkan ini terjadi karena output yang dihasilkan jenis usaha polikultur lebih besar yaitu 318.417,67 Kg sedangkan jenis usaha monokultur sebesar 118.256,OO Kg. Hal ini terjadi karena pada jenis usaha polikultur terdapat dua jaring dalam satu unit atau memelihara dua jenis ikan. Uji t yang dilakukan pada produktivitas input-input produksi budidaya ikan dalam KJA di Waduk Jatiluhur menyatakan adanya perbedaan yang nyata, kecuali pada produktivitas tenaga ketja dan biaya tetap. Berdasarkan uji f dan analisis usaha yang dilakukan budidaya ikan jenis usaha polikultur lebih menguntungkan daripada petani ikan jenis usaha monokultur.
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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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