Judul: Correlation between Group Dynamics and the Success Rate of Urban Farming Technology Dissemination to Farmers in Medan City
Abstrak: Permasalahan utama yang dihadapi oleh petani perkotaan adalah keterbatasan lahan, seperti halnya yang dialami oleh petani di Kota Medan. Oleh karena itu, Dinas Pertanian dan Perikanan Kota Medan melakukan kegiatan diseminasi teknologi mengenai program urban farming. Keberhasilan kegiatan diseminasi teknologi tidak hanya bergantung pada sumber dan materi informasi namun bergantung pada penerima informasi. Penelitian ini bertujuan untuk menganalisis hubungan dinamika kelompok dan tingkat keberhasilan diseminasi teknologi. Penelitian ini menggunakan metode kuantitatif melalui kuesioner yang diberikan kepada responden yang dipilih secara sensus serta didukung dengan data kualitatif yang diperoleh melalui wawancara mendalam. Pengolahan data pada penelitian ini menggunakan korelasi Rank Spearman. Hasil penelitian memperlihatkan bahwa dinamika kelompok pada dua kelompok tani tergolong dinamis dan tingkat keberhasilan diseminasi teknologi tergolong berhasil. Tidak terdapat korelasi antara karakteristik individu dan dinamika kelompok, namun terdapat korelasi yang nyata antara dinamika kelompok dan tingkat keberhasilan diseminasi teknologi., The main problem faced by urban farmers is limited land, as experienced by farmers in the city of Medan. Therefore, the Department of Agriculture and Fisheries of Medan City carried out technology dissemination activities regarding urban farming programs. The success of technology dissemination activities does not only depend on the sources and materials of information but also on the recipients of the information. This study aims to analyze the relationship between group dynamics and the success rate of technology dissemination. This study uses quantitative methods through questionnaires given to respondents selected by census and is supported by qualitative data obtained through in-depth interviews. Data processing in this study uses Spearman Rank correlation. The results showed that the group dynamics of the two farmer groups are dynamic, with the success rate of technology dissemination being high. There is no correlation between individual characteristics and group dynamics, but there is a significant correlation between group dynamics and the success rate of technology dissemination.
Keyword: farmers group, group dynamics, technology dissemination, urban farming

Judul: The Correlation between Group Work Productivity with Urban Farming Program Sustainability
Abstrak: Urban Farming merupakan pengelolaan pertanian di kawasan perkotaan dengan memanfaatkan lahan kosong. Dalam mewujudkan keberlanjutan program urban farming diperlukan peningkatan mutu kehidupan anggota yang dilihat melalui produktivitas kerja kelompok. Penelitian ini bertujuan untuk menganalisis hubungan produktivitas kerja kelompok dengan tingkat keberlanjutan ekonomi, tingkat keberlanjutan sosial dan tingkat keberlanjutan ekologi pada program urban farming. Produktivitas kerja kelompok dapat dilihat melalui faktor internal kelompok dan eksternal. Di sisi lain, keberlanjutan program urban farming dapat ditinjau dari tiga aspek, aspek keberlanjutan ekonomi, aspek keberlanjutan sosial dan aspek keberlanjutan ekologi. Metode digunakan dalam penulisan skripsi ini adalah metode kuantitatif melalui metode survei yang didukung oleh data kualitatif dengan wawancara mendalam, studi literatur dan pengamatan lapang. Hasil penelitian menunjukkan produktivitas kerja kelompok memiliki hubungan yang cukup dan signifikan dengan tingkat keberlanjutan ekonomi, kemudian produktivitas kerja kelompok memiliki hubungan yang kuat dan signifikan dengan tingkat keberlanjutan sosial dan ekologi program urban farming.
Keyword: productivity of group work, sustainable, urban farming

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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