Judul: Analisis Sistem Pemanfaatan Sumberdaya Lemuru (Sardinella longiceps) Yang Didaratkan Di Muncar Kabupaten Banyuwangi, Jawa Timur.
Abstrak: Lemuru (Sardinella longiceps) termasuk salah satu jenis ikan yang mempunyai nilai ekonomis penting di Indonesia. Konsentrasi terbesar populasi ikan lemuru terdapat di perairan Selat Bali. Besarnya potensi yang dimiliki telah memberikan arti penting bagi wilayah sekitarnya terutama di pesisir Jawa Timur dan Bali, khususnya Muncar. Kondisi perikanan di perairan Selat Bali saat ini menghadapi beberapa permasalahan berkaitan dengan manajemen pemanfaatannya, antara lain karena mudahnya orang memperoleh alat tangkap purse seine dan juga banyak beroperasinya pabrik-pabrik pengolahan ikan lemuru ataupun pengusaha-pengusaha tradisional sehingga merangsang perkembangan perikanan lemuru di Selat Bali secara tak terkendali.
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Judul: Tingkat Pemanfaatan dan Pola Musim Penangkapan Ikan Lemuru (Sardinella lemuru) di Perairan Selat Bali
Abstrak: Ikan lemuru (Sardinella lemuru) merupakan salah satu sumberdaya ikan di Perairan Selat Bali yang mempunyai potensi dan nilai ekonomis yang cukup tinggi. Produksi hasil tangkapan yang diperoleh saat ini sudah mengalami penurunan sebagai akibat terjadinya penangkapan berlebih (overfishing). Penelitian ini bertujuan untuk mengestimasi potensi lestari, tingkat pemanfaatan dan pengupayaan, serta pola musim penangkapan sumberdaya ikan lemuru di Perairan Selat Bali berdasarkan hasil tangkapan yang didaratkan di Pelabuhan Perikanan Pantai Muncar. Metode dalam penelitian ini menggunakan metode surplus produksi untuk mencari potensi lestari (maximum sustainable yield), upaya optimum serta tingkat pemanfaatan dengan menggunakan model Schaefer. Sedangkan pola musim penangkapan ikan menggunakan analisis deret waktu (time series data) dan metode rata-rata bergerak (moving average). Hasil analisis menunjukkan bahwa nilai potensi lestari dan upaya optimumnya sebesar 33.576 ton per tahun dan 26.696 trip per tahun. Adapun untuk tingkat pemanfaatan selama 2004-2008 telah melebihi nilai potensi lestari pada tahun 2006 dan 2007 yaitu sebesar 153% dan 161%, dan tingkat pengupayaan selama lima tahun terakhir telah melebihi upaya optimumnya sudah diatas 100%. Bulan Desember sampai Februari sangat baik untuk melakukan operasi penangkapan ikan lemuru karena sumberdaya ikan melimpah dan sudah layak tangkap. Sebaliknya, pada bulan Maret sampai Nopember merupakan waktu yang kurang baik dalam mengupayakan operasi penangkapan ikan lemuru karena sumberdaya ikan sedikit dan ukuran ikan belum layak tangkap.
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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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