Judul: Pengkajian investasi modal usaha perikanan rakyat jaring udang di perairan sekitar Cirebon Jawa Barat
Abstrak: Pertambahan penduduk Indonesia menuntut adanya sumber bahan makanan. Ketersediaan sumber bahan makanan bergantung kepada sumberdaya alam. Salah satu sumberdaya alam di laut, yakni sumberdaya perikanan laut diharapkan dapat diandalkan dalam pemenuhan kebutuhan protein hewani yang terjangkau oleh masyarakat. cireoon dikenal sebagai daerah pusat kegiatan perikanan .laut yang terbesar di Propinsi Jawa Barat. Wilayah perairan sekitar Cirebon Utara diduga telah mengalami overfishing, namun program penanaman i nvestas i di bi dang us aha per i kanan laut, khususnya usaha perikanan rakyat Jaring Udang (yang mel iputi : unit a lat tangkap Trammel Net, unit alat tangkap Jaring Rampus dan unit alat tangkap Jaring Dogol) masih terus berlangsung hingga saat ini. Kondisi yang demikian dapat mengakibatkan adanya over exploitation terhadap sumberdaya udang yang tidak diinginkan terjadi oleh semua pihak. Tujuan pokok penelitian sehubungan dengan kasus Wilayah Cirebon ini adalah untuk : (1) Mengetahui tingkat pemanfaatan sumberdaya udang dalam kondisi aktualnya di saat sekarang ini dan tingkat pemanfaatan optimalnya yang seharusnya dilakukan, (2) Menget ahui variasi tingkat pendapatan usaha per ikanan rakyat Jaring Udang, sehubungan dengan bervariasinya besarnya investasi modal pada pengelolaan masing-masing usaha tersebut di atas. dan ( 3) Mengetahu i apakah i nvestas i modal pada variasi unit usaha perikanan rakyat Jaring Udang masih relevan .untuk terus dilakukan dalam kondisi saat ini dan masa yang akan datang. Has i l pene lit i an menunj ukkan bahwa dengan menggunakan pendekatan pendugaan Mode i Bi oekonomi , ti ngkat pemanfaatan sumberdaya udang di Wilayah Cirebon sudah Overfishing, baik secara biologi (Biological Overfishing) maupun melalui pendekatan ekonomi (Economical Overfishing). Sebag ai var iabel kendali yang dapat dikuasai, maka variabei kegiatan Upaya Tangkap atau Fishing Effort dapat dikurangi, terutama kegiata n Fishing Effort pada masing-mas1ng unit alat tangkap Jaring Rampus dan Jaring 0ogo1 dalam berbagai variasi penggunaan mesin motor temper yang ada. Hal ini disebabkan ka rena var,as' pengelolaan usaha kedua jenis unit alat tangkap tersebut dini lai tidak iayak berdasarkan peni laian kriteria investasi can analisis determinasinya. ...
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Judul: Pengkajian Investasi Modal Usaha Perikanan Rakyat Jaring Udang dalam Upaya Pengelolaan Sumberdaya Udang di Perairan Sekitar Cirebon Utara, Jawa Barat'
Abstrak: Two main issues: - sustainability of shrimp fishing area at North Cirebon and surrounding area and - feasibility of various fishing units were analyzed with the application of bioeconornic model and invesment analysis. It was evident from bioeconornic point of view that exploitation level of shrimp resource in the study area has come to overfishing condition. The implication is that fishing effort on shrimp should be corrected. The correction should not be based solely on biological consideration but also on the tinancial/invesrnent assessment.
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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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