Judul: Analisis Kelayakan Ekonomi dan Keberlanjutan Program Urban Farming di DKI Jakarta
Abstrak: Urban farming DKI Jakarta merupakan program yang diinisiasi oleh pemerintah provinsi dengan tujuan utama untuk meningkatkan kualitas lingkungan hidup melalui luasan area tutupan hijau produktif yang sekaligus untuk mendukung pangan lokal di wilayah DKI Jakarta. Pelaksanaan program urban farming saat ini masih belum banyak dilakukan oleh masyarakat di DKI Jakarta bahkan banyak wilayah yang awalnya terlibat dalam urban farming, saat ini sudah tidak aktif menjalankan program tersebut. Oleh karena itu, penelitian ini bertujuan untuk: (1) Menganalisis persepsi multistakeholder terhadap adanya program urban farming di DKI Jakarta; (2) Mengestimasi kelayakan finansial dan ekonomi program urban farming di DKI Jakarta; dan (3) Menganalisis keberlanjutan program urban farming di DKI Jakarta. Metode analisis yang digunakan dalam penelitian ini adalah analisis deskriptif dengan skala likert, analisis kelayakan finansial dan ekonomi, dan analisis keberlanjutan menggunakan pendekatan MDS-Rapfish. Hasil penelitian menunjukkan bahwa persepsi masyarakat terhadap program urban farming cenderung sangat baik terutama pada aspek keindahan dengan nilai skala likert 3,74 atau sangat setuju. Sebanyak 91,67% urban farming DKI Jakarta menunjukkan NPV dan BCR layak secara ekonomi, sedangkan secara finansial 58,34% urban farming memiliki NPV dan BCR yang layak. Status keberlanjutan program urban farming memiliki nilai indeks 58,21 artinya program urban farming DKI Jakarta memiliki status cukup berkelanjutan.
Keyword: Cost Benefit Analysis (CBA), Multi Dimensional Scaling (MDS), Urban Agriculture, Rapfish

Judul: Analysis of Society Perception and Economic Feasibility of the Urban Farming in Cicadas Village, Gunung Putri District, Bogor Regency
Abstrak: Urban farming merupakan program yang dibuat pemerintah yang bertujuan untuk mengatasi permasalahan perkotaan salah satunya dengan mengoptimalkan lahan terbatas dan meningkatkan kualitas lingkungan hidup melalui luasan area tutupan hijau produktif sekaligus untuk mendukung pangan lokal. Perkembangan pertanian perkotaan di Kabupaten Bogor menjadi tren populer yang salah satunya ditujukan untuk revitalisasi pertanian perkotaan. Berdasarkan observasi lapang, pelaksanaan program urban farming belum banyak dilakukan masyarakat di Desa Cicadas, Kecamatan Gunung Putri, Kabupaten Bogor. Oleh karena itu, penelitian ini bertujuan untuk menganalisis tingkat persepsi masyarakat dan menganalisis biaya dan manfaat secara finansial dan ekonomi terhadap pengembangan urban farming di Desa Cicadas, Kecamatan Gunung Putri, Kabupaten Bogor. Metode analisis yang digunakan yaitu analisis persepsi dengan skala Likert dan analisis kelayakan finansial dan ekonomi yang menilai kelayakan dari sisi masyarakat dengan menggunakan metode cost benefit analysis. Hasil penelitian menunjukkan bahwa persepsi masyarakat terhadap manfaat urban farming tergolong baik dilihat dari pengetahuan, partisipasi, kendala, serta manfaat. Berdasarkan hasil analisis kelayakan dengan indikator NPV, Net B/C, dan Gross B/C menunjukkan bahwa program urban farming di Desa Cicadas, Kecamatan Gunung Putri, Kabupaten Bogor layak secara finansial, namun tidak layak secara ekonomi., Urban farming is a program created by the government that aims to overcome urban problems, one of which is by optimizing limited land. The development of urban farming in Bogor Regency has become a popular trend, one of which is aimed at the revitalization of urban agriculture. However, in its implementation, the urban farming program has not been carried out by many communities in Cicadas Village, Gunung Putri District. The purposes of this study are to: (1) analyze the level of society perception, (2) analyze the costs and benefits financially and economically to the development of urban farming in Cicadas Village, Gunung Putri District, Bogor Regency. The research methods include perception analysis with Likert scale and a financial and economic feasibility analysis that assesses the feasibility from the community side using the cost benefit analysis method. The analysis method used is a perception analysis with Likert scale and a financial and economic feasibility analysis that assesses the feasibility of the community using the cost benefit analysis method. The results showed that people's perceptions of the benefits of urban farming are relatively good in terms of knowledge, participation, constraints, and benefits. The results of the feasibility analysis with NPV, Net B/C, and Gross B/C indicators showed that the urban farming program in Gunung Putri District, Bogor Regency is financially feasible, but not economically feasible.
Keyword: conventional, cost benefit analysis, hydroponics, land conversion, likert scale

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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