Judul: Dinamika Kelompok dan Diseminasi Informasi Urban Farming pada Kelompok Tani (Kasus di Kecamatan Pesanggrahan, Jakarta Selatan, DKI Jakarta)
Abstrak: Keterbatasan lahan merupakan salah satu permasalahan yang dihadapi oleh petani di Kecamatan Pesanggrahan, Jakarta Selatan. Oleh karena itu, terdapat upaya yang dilakukan pemerintah berupa diseminasi informasi mengenai program urban farming. Dalam menentukan keberhasilan kegiatan diseminasi informasi bergantung pada penerima informasi yaitu anggota kelompok tani. Tujuan penelitian ini yaitu untuk menganalisis hubungan dinamika kelompok dengan tingkat diseminasi informasi urban farming. Variabel dalam penelitian ini yaitu karakteristik anggota kelompok (X1), faktor-faktor dinamika kelompok (X2), dinamika kelompok (Y1), dan tingkat diseminasi informasi (Y2). Penelitian ini menggunakan tabulasi silang untuk menganalisis hubungan antar variabel. Hasil penelitian ini menunjukkan bahwa tidak terdapat korelasi antara karakteristik anggota kelompok dengan dinamika kelompok. Namun, terdapat korelasi antara faktor dinamika kelompok dengan dinamika kelompok dan dinamika kelompok dengan tingkat keberhasilan diseminasi informasi., Land limitation is one of the problems faced by urban farmers in Pesanggrahan District, South Jakarta. Therefore, there are efforts made by the government in the form of information dissemination regarding the urban farming program. In determining the success of information dissemination activities, it depends on the recipient of the information which is the member farmer groups. The purpose of this study is to analyze the relationship between group dynamics and the level of dissemination of urban farming information. The variables in this study were members characteristics (X1), group dynamics factors (X2), group dynamics (Y1), and level of information dissemination (Y2). This study used crosstab to analyze the relationship between variables. The results showed that there is no correlation between member groups characteristics and group dynamics. However, there is a correlation between group dynamics factors and group dynamics and the success rate of information dissemination.
Keyword: dissemination information, farmers group, group dynamics

Judul: Relationship of Group Dynamics with Farm Sustainability (Case: Wanti Asih Farmers Group, Cibalung Village, Cijeruk Sub-District, Bogor District)
Abstrak: Usahatani berkelanjutan adalah kegiatan pertanian yang berorientasi pada keseimbangan dimensi ekonomi, dimensi ekologi dan juga dimensi sosial. Dinamika kelompok sangat menentukan berhasilnya keberlanjutan usahatani. Dinamika kelompok dipengaruhi oleh karakteristik petani yang akan menentukan tingkat kedinamisan kelompok. Tujuan dari penelitian ini adalah menganalisis dinamika kelompok pada kelompok tani dan hubungannya dengan karakteristik petani, menganalisis bentuk keberlanjutan usahatani dalam kelompok tani, dan menganalisis hubungan dinamika kelompok dengan keberlanjutan usahatani. Metode penelitian yang digunakan adalah metode kuantitatif melalui metode sensus dan didukung oleh data kualitatif dengan responden sebanyak 30 orang. Hasil penelitian menunjukkan tingkat dinamika kelompok dan keberlanjutan usahatani berada pada tingkat sedang kecuali indikator maksud terselubung yang berada pada tingkat rendah. Terdapat hubungan yang nyata antara tingkat pendapatan, dukungan penyuluhan, dan kemitraan dengan dinamika kelompok. Terdapat pula hubungan yang nyata antara variabel dinamika kelompok dengan keberlanjutan usahatani pada indikator keberlanjutan ekologi dan keberlanjutan sosial, namun terdapat hubungan tidak nyata pada indikator keberlanjutan ekonomi dengan dinamika kelompok. Kata kunci : dinamika kelompok, keberlanjutan usahatani, kelompok tani, Sustainable farming is an agricultural activity oriented to the balance of economic dimensions, ecological dimensions and also social dimensions. The group dynamics determine the success of agricultural sustainability. The group dynamics are influenced by the characteristics of farmers who will determine the level of dynamism of the group. The purpose of this study is to analyze the group dynamics in the farmer group and its relationship with the characteristics of farmers, analyze the form of sustainability of farming in the farmer group, and analyze the relationship of group dynamics with the sustainability of farming. The research method used is quantitative method through census method and supported by qualitative data with 30 respondents. The results showed the level of group dynamics and sustainability of farming was at a moderate level except for veiled intent indicators that were at low levels. There is a real relationship between income levels, counseling support, and partnerships with group dynamics. There is also a real relationship between the variable group dynamics and the sustainability of farming on the indicators of ecological sustainability and social sustainability, but there is an unreal relationship on the indicators of economic sustainability with the group dynamics. Keywords : farm sustainability, farmer group, group dynamics
Keyword: Dinamika Kelompok, Keberlanjutan Usahatani, Pertanian Berkelanjutan, Kelompok Tani, Group Dynamics, Farm Sustainability, Farmers Group, farm sustainability, farmer group, group dynamics

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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