Judul: Pengaruh Perikanan Apong terhadap  Keberadaan Sumberdaya Udang (PENAEID) di  Perairan Karang Anyar, Kabupaten Cilacap,  Jawa Tengah (Studi Kasus di Perairan Segara Anakan,  Kabupaten Cilacap)
Abstrak: Penelitian ini bertujuan untuk mengkaji kelimpahan atau biomassa hasil tangkapan apong dan pengaruh kegiatan perikanan apong terhadap kelestarian sumberdaya udang penaeid di Segara Anakan, mengidentifikasi pengaruh konstruksi alat apong serta teknik pemasangan alat dalam operasi penangkapan nelayan, memberikan alternatif pola penggunaan alat yang berguna bagi pengelolaan sumberdaya udang agar tetap lestari.
Keyword: 

Judul: Dampak perikanan Sudu terhadap kelestarian stok udang Penaeidae di perairan pantai Cirebon dan alternatif pengelolaannya
Abstrak: Udang khususnya jenis-jenis penaeid merupakan salah satu komoditi ekspor non-migas yang dapat memberikan kontribusi terbesar bagi peningkatan devisa negara. Hal ini dimungkinkan, karena udang memiliki nilai ekonomis dan potensi kemelimpahan yang tinggi. Selain itu, udang juga berperan sebagai salah satu penyedia protein hewani dalam negeri. Dengan demikian, setiap upaya yang ditujukan untuk memanfaat- kan sumberdaya udang laut dengan tetap memperhatikan aspek kelestariannya adalah strategis. Kegiatan perikanan sudu di perairan pantai Cirebon diduga dapat mengancam kelestarian stok udang penaeid di wilayah perairan ini. Dugaan ini berdasarkan asumsi, bahwa alat tangkap sudu selain menangkap udang rebon (target Utama) menangkap pula berbagai jenis pasca-larva dan yuwana udang penaeid. Penelitian yang dilakukan di tiga daerah perikanan rebon utama di Cirebon, yaitu Ambulu, Gebang, dan Karangreja ini berlangsung sejak tanggal 20 Juli sampai 30 Oktober 1985. Tujuan penelitian ini adalah untuk mengetahui pengaruh kegiatan perikanan sudu terhadap kelestarian stok udang penaeid di perairan pantai Cirebon dan mendapatkan berbagai informasi penting lainnya yang berguna bagi keperluan pengelolaan sumberdaya udang dan rebon secara rasional. Berdasarkan pada cara pengoperasian dan lebar mata jaringnya, ada dua jenis alat sudu di daerah penelitian, yaitu "maring" dan "sudu". Komposisi hasil tangkap alat sudu di daerah Cirebon 96% berupa jenis-jenis udang penaeid, 4% sisanya terdiri dari kelompok udang rebon. Sebaliknya komposisi hasil tangkap alat maring justeru sebagian besar (99%) terdiri dari kelompok udang rebon dari jenis-jenis ordo Mycidacea dan famili Sergestidae (Acetes dan Lucifer). Analisis secara ekstrapolasi menunjukkan, bahwa alat tangkap sudu secara potensial menimbulkan dampak negatif (ancaman) terhadap kelestarian stok udang penaeid di perairan pantai Cirebon. Sedangkan alat tangkap maring tidak (kecil sekali) menimbulkan ancaman bagi kelestarian stok udang penaeid. Beberapa parameter lingkungan meliputi salinitas, suhu perairan, pH, kandungan bahan organik, kedalaman air, dan keadaan bulan, ternyata tidak berpengaruh nyata terhadap persentase udang penaeid dalam hasil tangkap alat sudu.
Keyword: Shrimp

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: