Judul: Kemungkinan pengembangan perikanan cakalang di Sorong, Irian Jaya
Abstrak: Sumberdaya ikan tuna/cakalang masih merupakan andalan ekspor perikanan Indonesia, setelah udang. Nilai sumberdaya ini akan semakin besar seiring dengan semakin berkembangnya aktivitas pemanfaatan sumberdaya ini. Disadari bahwa peningkatan kualitas maupun kuantitas upaya penangkapan di suatu perairan selain akan semakin meningkatkan nilai ekonomi dari sumberdaya tersebut terhadap kesejahteraan masyarakat, khususnya masyarakat nelayan serta meningkatkan pendapatan pengusaha perikanan, juga diharapkan akan tetap mempertahankan suatu tingkat pengusahaan yang rasional yang berkesinambungan dimana sumberdaya tersebut tetap lestari. Oleh karena itu, kajian terhadap kondisi sistem perikanan yang sudah ada perlu dilakukan, guna mendapatkan suatu bentuk sistem pemanfaatan yang efisien dan efektif secara teknis-ekonomis dan tetap mempertimbangkan kelestarian sumberdaya.
Keyword: Skipjack tuna, Katsuwonus pelamis L.

Judul: Studi tentang perikanan cakalang dan tuna serta kemungkinan pengembangannya di Pelabuhan Ratu, Jawa Barat
Abstrak: Penelitian ini bertujuan untuk mengungkapkan keadaan perikanan cakalang dan tuna di Pelabuhan Ratu, termasuk tingkat pemanfaatan, kelayakan usaha serta teknologi penangkapan yang digunakan oleh masyarakat nelayan. Pembahasan akan diarahkan pula untuk dapat mengetahui kemungkinan penerapan teknologi penangkapan cakalang dan tuna yang lebih efektif di Pelabuhan Ratu. Penelitian ini merupakan studi kasus terhadap peri- kanan cakalang dan tuna di Pelabuhan Ratu. Untuk mengetahui kelayakan usaha penangkapan cakalang dan tuna digunakan metode survai. Cakalang dan tuna merupakan ikan yang mempunyai nilai ekonomis penting, baik sebagai komoditi ekspor maupun untuk konsumsi dalam negeri. Prospek perikanan cakalang dan tuna di Indonesia sangat baik, hal ini ditinjau dari segi potensinya cukup besar dan pasaran luar negerinya masih cukup terbuka. Penangkapan cakalang dan tuna di perairan teluk Pelabuhan Ratu umumnya menggunakan payang dan jaring insang hanyut. Hasil tangkapan cakalang dan tuna selama sembilan tahun terakhir menunjukkan kecenderungan menurun, demikian juga dengan upaya penangkapannya. Kecenderungan hasil tangkapan per satuan upaya (catch per unit effort) ternyata masih meningkat, dengan demikian sumberdaya cakalang dan tuna di daerah ini masih dapat dikembangkan.
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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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