Judul: Relationship between Mangrove Ecosystem Conditions and  Fish Resource Diversity in the Mangrove Sari Tourism Area, Kaliwlingi, Brebes,  Central Java
Abstrak: Ekosistem mangrove merupakan salah satu ekosistem pesisir yang memiliki fungsi ekologi dan ekonomi penting. Salah satu fungsi ekologi adalah sebagai habitat bagi berbagai jenis ikan. Hubungan ekosistem mangrove dengan keanekaragaman ikan di Kawasan Wisata Mangrove Sari Brebes hingga saat ini masih belum banyak diteliti lebih lanjut. Penelitian ini bertujuan menganalisis keterkaitan antara struktur komunitas mangrove dan ikan di Kawasan Wisata Mangrove Sari Brebes. Penelitian dilaksanakan selama 4 bulan (November 2023 hingga Februari 2024) di Kawasan Wisata Mangrove Sari Brebes pada tiga stasiun pengamatan. Hasil penelitian menunjukkan bahwa kerapatan mangrove tertinggi di Stasiun 1. Ekosistem mangrove di Pandansari termasuk dalam kategori rapat dengan didominasi oleh mangrove jenis Rhizophora mucronata dan R. apiculata. Total hasil tangkapan ikan dari tiga stasiun sebanyak 4940 individu dengan keanekaragaman ikan dalam kategori sedang dan ikan tersebar secara merata serta tidak terdapat jenis ikan yang mendominasi. Kerapatan mangrove dengan keanekaragaman ikan di Kawasan Wisata Mangrove Sari memiliki hubungan yang positif., Mangrove ecosystem is a coastal ecosystem that has important ecological and economic functions. One of the ecological functions as a habitat for various types of fish. Relationship between the mangrove ecosystem and fish diversity in the Mangrove Sari Brebes Tourism Area has not yet been studied further. This research aims to analyze the relationship between the structure of mangrove communities and fish in the Mangrove Sari Brebes Tourism Area. Research was carried out for 4 months (November 2023 to February 2024) in the Mangrove Sari Brebes Tourism Area at three observation stations. The research results show that the highest mangrove density is at Station 1. Mangrove ecosystem in Pandansari is included in the dense category, dominated by mangrove types Rhizophora mucronata and R. apiculata. Total fish catch from three stations is 4940 individuals with fish diversity in the medium category and fish are evenly distributed and there are no dominating fish species. Mangrove density with fish diversity in Mangrove Sari Tourism Area have a positive relationship.
Keyword: Brebes, ikan, Tourism, Brebes, Fish, Mangroves

Judul: Mangrove Ecotourism Services Assessment in Mangrovesari Marine Tourism Village, Kaliwlingi, Brebes Regency, Central Java
Abstrak: Wilayah pesisir Kabupaten Brebes memiliki kawasan mangrove dengan potensi nilai ekonomi yang tinggi. Salah satu jasa ekosistem mangrove adalah jasa budaya berupa ekowisata. Desa Wisata Bahari Mangrovesari mengalami penurunan kondisi lingkungan yang disebabkan oleh kurangnya informasi mengenai penilaian terhadap jasa ekowisata mangrove. Penelitian ini bertujuan menghitung nilai ekonomi ekowisata mangrove, serta mengidentifikasi faktor-faktor yang mempengaruhi kegiatan wisata. Metode penarikan sampel yang digunakan dalam penelitian ini purposive sampling dengan teknik pengumpulan data berupa wawancara. Valuasi dilakukan menggunakan Willingness to Pay (WTP) dan Travel Cost Method (TCM). Nilai ekonomi ekowisata mangrove Desa Wisata Bahari Mangrovesari dari pendekatan WTP sebesar Rp 490.524.000/tahun, sedangkan nilai ekonomi yang diperoleh dari pendekatan TCM sebesar Rp 170.028.000/tahun. Faktor-faktor yang berpengaruh nyata dalam kesediaan membayar adalah pendidikan dan pendapatan. Faktor-faktor yang yang berpengaruh nyata dalam jumlah kunjungan wisata diataranya, pendidikan, waktu luang, dan biaya perjalanan., The coastal area of Brebes Regency has mangrove areas with high potential value. One of the mangrove ecosystem value is cultural services in the form of ecotourism. Mangrovesari Marine Tourism Village has experienced a decline in environmental conditions caused by a lack of information regarding the valuation of mangrove ecotourism services. This study aims to calculate the economic value of mangrove ecotourism, and identify factors that influence tourism activities. The sampling method used in this study was purposive sampling with data collection techniques in the form of interviews. Valuation is done using Willingness to Pay (WTP) and Travel Cost Method (TCM). The economic value of mangrove ecotourism in Mangrovesari Marine Tourism Village from the WTP approach amounted to IDR 490,524,000/year, while the economic value obtained from the TCM approach amounted to IDR 170,028,000/year. Factors that have a real effect on willingness to pay are education and income. Factors that have a real effect on the number of tourist visits include education, leisure time, and travel costs.
Keyword: economic value, mangrove ecotourism, Travel Cost Method, Willingness to Pay

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