Judul: Analisis kelayakan finansial rencana usaha budidaya jamur kuping pada usaha agribisnis jamur lestari, Bandung
Abstrak: Indonesia adalah negara agraris yang berikilim tropis yang baik untuk pengembangan budidaya hortikultura. Krisis ekonomi yang melanda Indonesia sejak 5 tahun yang lalu menimbulkan ide bagi para pelaku agribisnis untuk membangun lahan pekerjaan baru di bidang hortikultura. Salah satunya adalah pembudidayaan jamur kuping. Usaha budidaya jamur kuping dinilai cukup menguntungkan karena tidak memerlukan lahan terlalu luas, modal tidak terlalu besar dan masa tanam relatif singkat. Selain itu, usaha budidaya jamur kuping juga berjasa untuk pemanfaatan kembali limbah tani (jerami) dan hutan (serbuk gergaji).
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Judul: Analisis kelayakan finansial budidaya jamur tiram(Pleurotus sp) pada usaha agribisnis supa tiram mandiri, Bogor
Abstrak: Secara umum, Indonesia sebagai salah satu negara yang beriklim tropis mempunyai potensi dan kesempatan yang cukup besar untuk memanfaatkan peluang usaha di bidang hortikultura. Krisis ekonomi yang melanda Indonesia dengan ditandai semakin merosotnya nilai tukar rupiah terhadap dollar menyebabkan mulai langkanya produk-produk impor, karena harganya yang semakin tinggi. Selain itu pada keadaan krisis ekonomi ini lowongan kerja semakin sulit didapat, dan banyak proyek yang berbasiskan pada industri terpaksa dihentikan karena mahalnya harga bahan baku. Hal ini mengakibatkan tenaga kerja banyak yang diberhentikan. Karena lowongan kerja semakin sulit didapat, orang mulai berpikir untuk menciptakan lapangan kerja dengan mulai melirik ke arah pertanian. Kondisi diatas membuka peluang bisnis baru bagi para investor yang ingin bemsaha dalam bidang pertanian, yaitu khususnya budidaya jamur tiram.
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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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