Judul: Pengaruh Perubahan Tutupan Lahan Mangrove terhadap Kerentanan Pesisir Kabupaten Karawang.
Abstrak: Keberadaan mangrove sebagai pelindung alami wilayah pesisir dari kerusakan yang disebabkan oleh arus, gelombang dan efek negatif dari kenaikan muka laut terancam akibat kegiatan manusia seperti konversi ekosistem mangrove menjadi lahan budidaya termasuk tambak. Penelitian ini menduga laju perubahan tutupan lahan mangrove di Kabupaten Karawang pada tahun 2000-2020 serta menganalisis coastal vulnerability index (CVI) tahun 2000 dan 2020 setelah tutupan lahan mangrove berubah. Analisis perubahan tutupan lahan mangrove menggunakan klasifikasi terbimbing, membagi wilayah pesisir menjadi kelas mangrove, badan air, lahan terbangun, vegetasi dan lahan terbuka. Kerentanan pesisir menggunakan CVI dengan menganalisis parameter berupa geomorfologi pantai, perubahan garis pantai, kemiringan pantai, kenaikan muka laut, tinggi gelombang laut rata-rata dan kisaran pasang surut. Tutupan lahan mangrove di Kabupaten Karawang mengalami peningkatan dari dari 77,69 ha pada tahun 2000 menjadi 353,12 ha pada tahun 2020 dengan rata-rata laju perubahan tutupan lahan mangrove sebesar 13,77 ha/tahun. Perubahan ini menyebabkan 61% wilayah pesisir mengalami penurunan kelas kerentanan pesisir, 9% mengalami kenaikan kelas kerentan dan 30% tidak mengalami perubahan. Sebanyak 50% wilayah pesisir yang dianalisis mengalami perubahan tutupan lahan mangrove.
Keyword: beach, coastal vulnerability index, grid, mangrove, supervised classification

Judul: Study of Mangrove Land Cover Changes and Sea Level Rise on Coastal Vulnerability of Bekasi Regency
Abstrak: Perubahan tataguna lahan, khususnya tutupan mangrove sangat mempengaruhi kerentanan kawasan pesisir. Kecamatan Muara Gembong, Kabupaten Bekasi ditetapkan sebagai salah satu kawasan hutan lindung mangrove. Konversi lahan mangrove serta bencana erosi pantai mengancam kerentanan kawasan pesisir Kabupaten Bekasi. Penelitian ini mengkaji perubahan tutupan lahan mangrove serta menganalisis kerentanan pesisir wilayah Kabupaten Bekasi tahun 2000 dan 2020. Pengkajian perubahan tutupan lahan mangrove dilakukan dengan menggunakan supervised classification untuk membaginya menjadi 5 kelas tutupan lahan, yaitu mangrove, vegetasi, lahan terbangun, lahan terbuka, dan badan air, kemudian memvalidasinya menggunakan Normalized Difference Vegetation Index (NDVI). Metode coastal vulnerability index (CVI) digunakan untuk menilai kerentanan pesisir Kabupaten Bekasi. Klasifikasi kerentanan yang dilakukan di wilayah kajian yang dibagi menjadi 72 grid menunjukkan bahwa separuh diantaranya (36 grid) tergolong memiliki kerentanan tinggi. Penurunan tutupan mangrove dari tahun 2000 sampai 2020 sebesar 23,55% menyebabkan kerentanan Muara Gembong bertambah luas, yang ditunjukkan oleh tambahan 26 grid yang memiliki kerentanan tinggi. Melindungi mangrove yang ada dan merestorasi garis pantai yang terdegradasi pelu diprioritaskan untuk mengurangi risiko bencana di Kawasan pesisir Kabupaten Bekasi., Coastal areas are particularly vulnerable to the impacts of human induced climate change and land-use change, especially mangrove cover. Muara Gembong District, Bekasi Regency is designated as one of the mangrove protected forest. However, rampant conversion has been causing coastal erosion in Bekasi Regency. This study examines changes in mangrove land cover and analyzes the coastal vulnerability of the Bekasi Regency area in 2000 and 2020. The assessment of mangrove land cover change was carried out using supervised classification five classes of land cover, including mangroves, vegetation, built-up area, open land, and water bodies, then validate it using the Normalized Difference Vegetation Index (NDVI). The coastal vulnerability index (CVI) method was adopted to assessthe coastal vulnerability of Bekasi Regency. The vulnerability classification carriedout in the study area divided into 72 grids showed that half of them (36 grids) were classified as highly vulnerable. The decrease mangrove cover during 2000-2020 of 23.55% caused the vulnerability of Muara Gembong to increase, as shown by additional 26 grids that are highly vulnerability. Protecting the existing mangroves and restoring the degraded area should be prioritized to reduce risks of disaster in the coastal zone of Bekasi Regency
Keyword: climate change, CVI, land-use, Muara Gembong, shoreline

Judul: Photosensor producing based on ferroelectric material of Ba0,5Sr0,5TiO3 doped by Ferrium Oxide (Fe2O3) on a P-Type Silicon Substate Si (100) applied as a digital camera with a single pixel image sensor
Abstrak: Thin film Ba0,5Sr0,5TiO3 (BST) doped with Fe2O3 was grown on p-type silicon substrate (100) using chemical solution deposition (CSD). It used the solvent 2-methoxyethanol with annealing temperature of 850°C and the doping treatment Fe2O3 of 2.5, 5, 7.5, 10 % of the mass formed BST. Pure BST had the highest absorption of 600 nm of light wavelength. Additions Fe2O3 moves highest absorption in the range of 560 nm. Fe2O3 addition was strengthening thin film sensitivity to the effects of light. In general, doping Fe2O3 10% was result the best absorbance and current-voltage of BST thin film. Electrical properties of thin films BST include dielectric, photoconductivity, and dissipation energy. Based on the current-voltage (I-V) analysis, pure BST and doped BST showed photodiode properties. Dielectric values obtained in the range from 23.32 to 243. Based on electrical conductivity data and energy dissipation, BST thin films have shown photodiode characteristics and are therefore suitable as light sensors. The image sensor in a digital camera is also a light sensor. This BST thin film has been scientifically proven to be a light sensor and also it can be applied as an image sensor. This is a novelty image sensor based on thin film Ba0.5Sr0.5TiO3.
Keyword: barium strontium titanate, thin film, photodiode, image sensor, digital camera