Judul: Keragaan Pemimpin Informal Bidang Pertanian dalam Difusi Inovasi Pertanian (Studi Kasus di Desa Nayagati Kecamatan Leuwi Damar Kabupaten Lebak)
Abstrak: Praktek Lapang ini bertu juan untuk menin jau kepemimpinan informal bidang pertanian dalam difusi inovasi pertanian, dan kedua bertujuan untuk melihat proses adopsi inovasi individual untuk bidani pertanian. Pembangunan pertanian membutuhkan inovasi-inovasi. Difusi merupakan salah Batu masalah dalam proses adopsi inovasi, terutama di daerah yang masih terbelakang atau kurang maju. Pada kondisi demikian pemimpin informal merupakan potensi untuk keberhasilan adopsi inovasi pertanian. Hal itulah yang melatarbelakangi praktek lapang ini.
Keyword: 

Judul: Fungsi Kepemimpinan Ketua Kelompok Tani dalam Percepatan Proses Difusi Inovasi (Kasus: Kelompok Tani di Desa Sindanglaya, Kecamatan Cipanas, Kabupaten Cianjur)
Abstrak: Pembangunan pertanian dan sumber daya manusia pertanian di Indonesia yang banyak menggunakan pendekatan kelompok menunjukkan pentingnya peranan ketua kelompok tani. Pemimpin dalam kelompok tani merupakan salah satu agen yang dapat mendifusikan sebuah inovasi dan dianggap lebih efektif. Pelibatan pemimpin kelompok tani mampu mempercepat difusi inovasi karena masyarakat merasa lebih memiliki inovasi yang berasal dari masyarakat itu sendiri. Penelitian yang dilakukan di Desa Sindanglaya, Kecamatan Cipanas, Kabupaten Cianjur menggunakan pendekatan kuantitatif dengan metode survei dan didukung data kualitatif yang didapat melalui wawancara mendalam dan observasi. Responden sebanyak 46 orang diambil menggunakan teknik sampel acak distratifikasi. Hasil penelitian menunjukkan fungsi kepemimpinan ketua kelompok tani yang menonjol adalah fungsi hubungan sedangkan proses difusi inovasi yang dilakukan oleh anggota kelompok tani tergolong sedang atau cukup berhasil. Analisis data menggunakan uji korelasi Rank Spearman menunjukkan bahwa terdapat hubungan kuat antara fungsi kepemimpinan ketua kelompok tani dengan proses difusi inovasi yang menunjukkan bahwa fungsi kepemimpinan ketua kelompok tani dapat mempercepat proses difusi inovasi.
Keyword: Diffusion of Innovation, Leadership Function, Farmer Group, Leader

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
Keyword: