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: Detection of Coastline Changes Using Landsat Satellite  Imagery in the Coastal of Padang City
Abstrak: Garis pantai selalu mengalami perubahan yang diakibatkan oleh faktor alam maupun non alam. Perubahan garis pantai perlu dipantau untuk mencegah hal-hal yang tidak diinginkan. Teknologi pengindraan jauh citra satelit sudah banyak digunakan dalam pemantauan garis pantai, salah satunya menggunakan Citra Landsat. Tujuan penelitian ini adalah mendeteksi perubahan garis pantai dengan menggunakan citra satelit multi temporal di pesisir Kota Padang dengan metode Digital Shoreline Analysis System (DSAS). Hasil dari Metode DSAS adalah nilai perubahan garis pantai yang mempunyai nilai positif dan negatif. Nilai positif berarti pantai mengalami akresi dan nilai negatif berarti pantai mengalami abrasi. Garis pantai di Padang umumnya mengalami kemunduran akibat proses abrasi. Laju abrasi terbesar terjadi di Desa Air Manis. Sementara itu, proses akresi terbesar yang menyebabkan penambahan garis pantai terjadi di di Desa Purus. Faktor-faktor yang menyebabkan terjadinya abrasi adalah terjangan gelombang dan arus sehingga terjadinya kemunduran garis pantai. Faktor-faktor yang menyebabkan terjadinya akresi adalah reklamasi pantai dan proses sedimentasi oleh aliran sungai., The coastline always changes due to natural and non-natural factors. Coastline changes need to be monitored to prevent unwanted things. Satellite image remote sensing technology has been widely used in monitoring coastlines, one of them is Landsat imagery. The purpose of this study was to detect coastline changes using multi-temporal satellite imagery on the coast of Padang City using the Digital Shoreline Analysis System (DSAS) method. The result of the DSAS method is the value of the coastline change that has positive and negative values. A positive value means the beach is accretion and a negative value means the beach is abrasion. The coastline in Padang generally had setbacks because of abrasion. The largest pace of abrasion in Air Manis Village. Meanwhile, the largest accretion process affected coastline additions in Purus Village. The factors of abrasion are the lunge of waves and sea waves so the setback coastline happens. The factors of accretion are beach reclamation and sediment process of river flow.
Keyword: abrasion, accretion, coastline, DSAS, Padang City

Judul: Sintesis Flavonol melalui 2’-Hidroksikalkon
Abstrak: Flavonol is a class of flavonoids commonly found in fruits and vegetables. Flavonol is very useful, especially in food sector and health. In this study, flavonol unsubstituted was successfully synthesized from an intermediate material 2’-hydroxychalcone. The 2’-hydroxychalcone was synthesized by Claisen-Schmidt condensation method between o-hydroxyacetophenone and benzaldehyde using 4 different catalysts, namely KOH 60%, solid pellet of KOH-grinding technique, BF3-Et2O, and NaH in DMF. The KOH 60% was the best catalyst, giving the highest yield (57%). Afterward, the flavonol was synthesized in 1-stage oxidation cyclization of o-hydroxyacetophenone using Algar-Flynn-Oyamada (AFO) reaction, giving 76%. The flavonol total yield from 2’-hydroxychalcone was 43%. All synthesized products were characterized by their melting points and their spectra. The success of the synthesis flavonol opens the way to synthesis of useful flavonol derivatives such as quercetin and kaempferol.
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