Judul: Analisis kelayakan investasi pengembangan usaha pemasok (supplier) ikan hias adil fish farm di Depok
Abstrak: Adil Fish Farm merupakan salah satu perusahaan yang bergerak di bidang perdagangan ikan bias. Perusahaan ini memulai usahanya dikarenakan melihat peluang permintaan ikan hias yang terus meningkat dari tahun ke tahun. Saat ini Adil Fish Farm telah memiliki lahan seluas 900 m2 dan telah mencapai volume penjualan sebesar 75.000 ekor ikan hias per minggunya. Penjualan dominan dilakukan terhadap eksportir-eksportir ikan hias. Penelitian ini bertujuan untuk menganalisis keuntungan usaha, menganalisis kelayakan investasi yang ditanamkan pada usaha ini apakah layak untuk dikembangkan dan menganalisis sensitivitas usaha terhadap kemuilgkinan terjadinya perubahan harga input maupun output.
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Judul: Analisis kelayakan investasi pengusahaan ikan gurami: studi kasus di perusahaan Mekar Tambak Sari, Kecamatan Sawangan, Kota Depok
Abstrak: Pangan yang menjadi kebutuhan pokok sejauh ini cukup banyak memberikan peluang usaha. Seiring makin tumbuhnya kesadaran masyarakat pada sumber pangan bergizi tinggi, hal ini perlu diimbangi dengan ketersedian bahan pangan bergizi yang cukup. Mengkonsumsi ikan air tawar adalah salah satu cara untuk mendapatkan protein yang sehat serta bebas kolesterol. Seiring dengan hal tersebut permintaan akan ikan air tawar pun menjadi semakin tinggi. Salah satu usaha disektor perikanan budidaya air tawar, yang mempunyai potensi cukup besar adalah ikan gurami. Mekar Tambak Sari merupakan salah satu perusahaan yang mengusahakan ikan bawal dan patin, serta menjual ikan gurami. Dalam menjalankan usahanya perusahaan ini terhambat oleh kurangnya persediaan ikan gurami, sehingga permintaan (pesanan) ikan gurami tidak dapat dipenuhi seluruhnya. Selama ini Mekar Tambak Sari mendatangkan ikan gurami dari petani sekitar dan tidak mengusahakan sendiri, padahal ikan gurami merupakan salah satu produk unggulan yang ditawarkan perusahaan.
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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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