Judul: Analysis of Coastline Changes Using Sentinel 2A Imagery in the Coastal Area of West Pandeglang, Banten
Abstrak: Wilayah pesisir barat Kabupaten Pandeglang mengalami perubahan garis pantai yang disebabkan oleh faktor parameter hidro-oseanografi maupun aktifitas manusia. Pengamatan perubahan garis pantai dapat dilihat dengan nyata dan secara tidak langsung melalui penginderaan jauh. Tujuan penelitian untuk mengidentifikasi dan memetakan perubahan garis pantai di pesisir barat, Kabupaten Pandeglang, Banten. Ekstraksi garis pantai citra satelit Sentinel 2A menggunakan Tasseled Cap dan Perhitungan garis pantai menggunakan metode Digital Shoreline Analysis system (DSAS) serta pengambilan data lapang menggunakan GCP. Hasil analisis perubahan garis pantai cenderung lebih dominan mengalami abrasi dibandingkan dengan akresi. Abrasi terbesar terjadi di Desa Sidamukti sebesar 26.65 meter/tahun dan Akresi terbesar terjadi di Desa Sukajadi sebesar 24.92 m/tahun. Perbandingan kategori perubahan garis pantai dapat menggambarkan daerah yang rawan terkena gelombang besar sehingga dapat dijadikan sebagai pengalaman sekaligus pengetahuan untuk masyarakat Kabupaten Pandeglang. Kajian penelitian perubahan garis pantai penting dilakukan sebagai acuan dalam pembangunan wilayah pesisir dan pelabuhan, pariwisata, serta budidaya, Shoreline changes on the west coast of Pandeglang Regency are caused by hydro-oceanographic parameters and human activities. These changes can be observed through remote sensing. The research aims to identify and map these changes. The shoreline of a Sentinel 2A satellite image was extracted using the Tasseled Cap method. The shoreline was then calculated using the Digital Shoreline Analysis System (DSAS) method and field data collected using Ground Control Points (GCP). The analysis of shoreline changes indicates a dominance of abrasion over accretion. The most significant abrasion occurred in Sidamukti Village at a rate of 26.65 metres per year, while the largest accretion occurred in Sukajadi Village at a rate of 24.92 metres per year. The comparison of categories of shoreline change can indicate areas that are susceptible to large waves. This information can be used to provide both experience and knowledge to the people of Pandeglang Regency. The study of shoreline change is important as a reference for the development of coastal areas, harbours, tourism, and cultivation
Keyword: Abrasion, Accretion, DSAS, Sentinel 2A, Shoreline

Judul: Detection of Coastline Changes Using Landsat Imagery in the Coastal of Sumur, Pandeglang, Banten.
Abstrak: Pesisir merupakan kawasan peralihan antara darat dan laut sehingga sangat potensial sebagai lokasi pembangunan dan cenderung mendapat tekanan yang berat sehingga rawan terhadap perubahan. Penginderaan jauh efisien dan efektif dalam pemantauan perubahan garis pantai. Penelitian ini dilakukan di pesisir Sumur, Pandeglang, Banten. Metode Digital Shoreline Analysis System (DSAS) digunakan untuk menghitung statistik laju perubahan garis pantai. Program DSAS membutuhkan beberapa parameter dalam pengukuran laju perubahan garis pantai seperti baseline, shoreline yang sudah terkoreksi pasang surut, dan transek. Perubahan garis pantai dihitung pada transek dengan perhitungan Net Shoreline Movement (NSM) dan End Point Rate (EPR). Abrasi terjadi pada subzona A2, A3, B3, C3, D1, D2, dan D3.Wilayah yang mengalami akresi meliputi subzona A1, A2, A3, B1, B2, dan B3. Perubahan garis pantai berupa abrasi terbesar terjadi di sub zona D1 dengan nilai -77 m. Nilai perubahan berupa akresi terbesar terjadi pada sub zona A3 yaitu sebesar 61,11 m. Perubahan yang terjadi disebabkan adanya arus menyusur pantai yang dipengaruhi oleh angin. Perubahan garis pantai yang terjadi bersifat ringan hingga sedang., Coastal area is a transitional area between land and sea which is very potential to be developed and tends to be under heavy pressure, thus it is vulnerable to change. Remote sensing is an efficient and effective tools in monitoring shoreline changes. This research was conducted on the coast of Sumur, Pandeglang, Banten. The Digital Shoreline Analysis System (DSAS) method was used to calculate the rate of change of the time series of shoreline vector data. The DSAS program requires several parameters in measuring the rate of shoreline change in this study, such as the baseline, tide-corrected shoreline, and transects. Shoreline changes were calculated on the transect by calculating the Net Shoreline Movement (NSM) and End Point Rate (EPR). Abrasion was occurred in subzones A2, A3, B3, C3, D1, D2, and D3. Accretion was occurred in subzones A1, A2, A3, B1, B2, and B3. Larges abrasion in shoreline was occurred in sub zone D1 with a value of -77 m. The larges accretion occurred in the A3 sub zone, which was 61.11 m. The changes are caused by the current along the coast which is influenced by the wind. Changes in the coastline that occur are mild to moderate.
Keyword: Abrasi, Akresi, DSAS, Garis Pantai, Landsat

Judul: Sintesis Flavon dari Fenol dan Benzoil Klorida
Abstrak: Flavone is a class of flavonoid, commonly found in plants with wide bioactivity spectrum. A widely used flavone synthesis route is through acidcatalyzed oxidative cyclization of β-diketone. In this study, unsubstituted flavone had been synthesized via 5-step from phenol, with 22% yield and successfully increased the yield of previous study on Fries rearrangement of phenyl acetate and benzoylation of o-HAP steps. Phenol was acetylated resulting 93% phenyl acetate. AlCl3-catalyzed Fries rearrangement in 1.5 hour and at 120 °C converted phenyl acetate into o-hydroxyacetophenone (o-HAP) with 40% yield. AlCl3 as catalyst produced o-HAP with higher and reproducible yield compared with BF3·Et2O and ZnCl2. Benzoylation of o-HAP followed by Baker-Venkataraman rearrangement of the ester product using KOH in dried pyridine produced β-diketone 1-(2- hydroxyphenyl)-3-phenylpropane-1,3-dione. The yield of ester and β-diketone were 71% and 85%, respectively. Finally, oxidative cyclization of β-diketone with sulphuric acid as catalyst produced 99% of flavone. The flavone product had been characterized spectroscopically and its melting point as well.
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