Judul: Resiprositas dan Struktur Masyarakat: Studi Kasus Nelayan Pancing di Karanggongso, Jawa Timur
Abstrak: Studi ini membahas resiprositas dan struktur masyarakat nelayan pancing yang tingga' di Karanggongso, Teluk Segoro Wedi. Mereka hidup dalam kekeluargaan, tinggal berdekatan satu sama lain dan ~frekuensi interaksi tatap muka yang tinggi. Masyarakat ini hidup dari sumberdaya habitat sekitarnya, berstruktur sederhana seper- 1 ti masyarakat kecil yang asli. Mereka telah banyak berinteraksi dengan LSL, namun ciri khas LL masih kuat mewarnai kehidupannya.
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Judul: Pola Interaksi Stakeholder Perikanan Tangkap pada Komunitas Nelayan Pancing Layur di Kawasan Pangkalan Pendaratan Ikan Cisolok, Kabupaten Sukabumi Jawa Barat.
Abstrak: PPI Cisolok merupakan kawasan perikanan yang kedepannya akan menggantikan fungsi PPN Palabuhanratu untuk kapal-kapal berukuran di bawah 30 GT. Namun, kondisi perikanannya sangat memperihatinkan banyak nelayan di sana lebih memilih untuk bekerjasama dengan kelembagaan-kelembagaan informal sehingga peran dari beberapa lembaga formal mulai tergantikan. Penelitian ini ditujukan untuk mengkaji struktur interaksi pada komunitas nelayan di kawasan PPI Cisolok, mengidentifikasi tipologi kelembagaan, dan merumuskan strategi untuk pemberdayaan masyarakat di kawasan PPI Cisolok. Pendekatan kajian dengan menggunakan pendekatan kualitatif, dengan strategi penelitian menggunakan metode studi kasus. Hasil analisis menunjukan stuktur interaksi komunitas nelayan di dominasi oleh kategori tokoh pemilik usaha perikanan, kondisi kelembagaan tergolong tidak sustain, dan strategi pemberdayaan dapat di mulai dari modal sosial yang dimiliki masyarakat setempat. Kata kunci: struktur interaksi, tipologi kelembagaan, modal sosial.
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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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