Judul: Analisis Bioekonomi Perikanan Kembung (Rastrelliger spp) di Kota Padang Provinsi Sumatera Barat
Abstrak: Nilai subsektor perikanan terhadap PDRB Kota Padang mengalami peningkatan setiap tahunnya. Peningkatan nilai PDRB diiringi oleh peningkatan jumlah nelayan dan peningkatan produksi ikan kembung. Peningkatan produksi ikan dapat mempengaruhi kondisi biologi dan ekonomi perikanan. Kajian ini bertujuan untuk melihat karakteristik dari nelayan ikan kembung, menganalisis pemanfaatan sumberdaya ikan kembung, menganalisis tingkat degradasi sumberdaya ikan kembung serta merumuskan rekomendasi kebijakan dari hasil bioekonomi. Metode yang digunakan dalam penelitian ini yaitu pendekatan statistic descriptive, analisis bioekonomi model Schnute, analisis degradasi. Hasil penelitian menunjukkan karakteristik nelayan berupa tingkat pendidikan, umur, jumlah ABK, pengalaman, dan pendapatan. Penangkapan ikan kembung memberikan konstribusi sebesar 13,13% terhadap pendapatan nelayan melaut. Hasil analisis bioekonomi menunjukkan bahwa perikanan ikan kembung terdapat kecenderungan mengalami overfishing secara biologi dan belum terjadi overfishing secara ekonomi karena kondisi perikanan masih mampu mengahasilkan nilai rente yang positif. Laju degradasi ikan kembung di Kota Padang sebesar 0,27 dimana perikanan kembung belum mengalami degradasi. Berdasarkan hal tersebut diperlukan kebijakan untuk pengelolaan perikanan yang dapat mengatur batas penggunaan alat tangkap dalam rangka mengurangi jumlah effort yang berlebih.
Keyword: Bioeconomic, degradation rate, mackerel (Rastrelliger spp), Padang

Judul: Penilaian depresiasi sumberdaya ikan kembung dengan pendekatan penurunan produktivitas: studi kasus Kabupaten Pandeglang, Provinsi Banten
Abstrak: Mackerel (Rastrelliger spp.) is a small pelagic fish resource which has a high economic value and an important source of income and protein for communities of Pandeglang Regency. Due to increasing demand, the pressure of mackerel resource exploitation increase and raised the question of degradation and sustainability of the resource. Based on that condition the study aims to calculate degradation and depreciation rate of mackerel resource, bioeconomic analysis for resource management, and identification policy for sustainable resource management. Based on the calculation of Catch Per Unit Effort (CPUE) mackerel resources in Pandeglang indicated experiencing overfishing in biology (biological overfishing) because of fishing activity. Increased fishing effort unit will reduce CPUE mackerel resources of 0.00001 tons per trips per year. According to the calculation of the average degradation and depreciation of mackerel resource respectively 0.28 and 0.29. Since of depreciation and degradation is less than 0.5 indicates that the mackerel in Pandeglang has not been degraded and depreciated, but since the year of 2009 show the increasing degradation and depreciation. The best resource management option is carried out under conditions MEY (Maximum Economic Yield) which production rate 2,662 tons per year and the effort as many as 13,971 trips per year. Fishermen will obtain the maximum rents amounting to Rp 23.67 billion per year. Sustainable mackerel resource management policies to prevent and overcome the problems of overfishing, especially in Pandeglang can be done by implementing responsible approach based on ecosystem, socio-economic and cultural, socio-political, and legal institutional aspects.
Keyword: Mackerel, Overfishing, Degradation, Depreciation, Bioeconomic, Bogor Agricultural University, Institut Pertanian Bogor, IPB

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition