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: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4