Judul: Analisis Kinerja Kelembagaan dan Pendapatan Usahatani Manggis Kelompok Tani Karya Mekar di Desa Karacak Leuwiliang
Abstrak: Farmer’s group is one of agribusiness institution, which is located in the region of the countryside. This institution is expected plays an important role in every farming activity. However, there are still many farmers groups that do not run according to the function. This research aims at analysing the performance of the Karya Mekar Farmers Group and the influence of the institution against the success of mangosteen farming on farmer members in Karacak Village Leuwiliang. The result of this research showed that Karya Mekar Farmers Group had not been running optimally yet. This because there were things that didn’t suit well such as things that related to market existence and credit system on farmers’ group that didn’t work well yet. Karya Mekar Farmers Group also played the role in the success of farming on its members. This could be seen from the result of farming income and the R/C ratio which higher than non-group farmers
Keyword: Leuwiliang, Karya Mekar, institutional, farmers’ group

Judul: Evaluasi Kinerja Gapoktan Mekarmukti dan Dampaknya terhadap Petani Cabai Anggota di Kecamatan Cibinong, Kabupaten Cianjur, Jawa Barat
Abstrak: The presence of farmers institution could be the key to improve welfare and economies of scale in the village for farmers. As its function, farmers institution could be a forum of farmers for improving quality, quantity, and continuity of their crops togetherness. Farmers institution also could be balancing the bargaining position between small farmers and marketing farmers then food estates. This research aims to assess the performance of farmers institution in Mekarmukti Village, Cibinong District, Cianjur, West Java in farmers group level as a forum of farmers and Farmers Group Associaton (FGA) level which could be improving the economies of scale and act as supporting institutions other agribusiness subsystem in agribusiness system of chili. This research also measured an impact from FGA and farmers group to farmers so that establish a hierarchy system which synergize for farmer’s welfare. Performance analysis measured with descriptive statistical analysis and impact analysis measured with nonparametical statistic, Wilcoxon Paired Test. Result, Mekarmukti FGA have a success rate performance of 72,73 percent and farmers group in associated with it have rate in the range below. Mekarmukti FGA also impact positively in 17 variabels from 23 tested variabels. In conclusion, FGA and farmers group in associated with are important for member farmers because of have a good performance and and positive impact. However, Mekarmukti FGA and farmers group in associated with still have to improve the performance which not optimally yet and reducting the negative impact.
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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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