Judul: Mapping the Area and Density of Mangroves in Pantai Bahagia Village, Muara Gembong District, Bekasi Regency
Abstrak: Penurunan luasan mangrove menyebabkan perlunya pemantauan hutan mangrove untuk mencegah terjadinya dampak keberlanjutan dari degradasi lahan mangrove di pesisir Desa Pantai Bahagia, Kecamatan Muara Gembong, Kabupaten Bekasi. Penelitian ini bertujuan mengidentifikasi dan memetakan luas sebaran dan kerapatan mangrove di Desa Pantai Bahagia. Analisis Normalized Difference Vegetation Index (NDVI) digunakan untuk mengetahui kerapatan mangrove di suatu area. Kerapatan mangrove yang dihasilkan terklasifikasi menjadi 3 kelas kerapatan, yaitu mangrove jarang (0,693 km2), mangrove sedang (0,562 km2), dan mangrove rapat (1,865 km2) dengan total luasan mangrove sebesar 3,12 km2. Hasil uji akurasi confusion matrix pada klasifikasi citra memperoleh nilai akurasi sebesar 86,58% dan kappa coefficient sebesar 0,697. Pengujian korelasi persentase tutupan kanopi mangrove yang diperoleh dari data lapang dengan nilai NDVI dilakukan menggunakan metode regresi linier sederhana dan menghasilkan koefisien korelasi (r) dengan nilai 0,834 dan koefisien determinasi (R2) dengan nilai 0,696., Mangrove areas decreasing lead to the need for monitoring of mangrove forests to prevent the impacts of mangrove area degredation that occured in the coast of Pantai Bahagia Village, Muara Gembong District, Bekasi Regency. This research aimed to compute and make distribution area and density map of mangrove in Pantai Bahagia Village. Normalized Difference Vegetation Index (NDVI) analysis is used to determine the density of mangroves in certain area. The results were classified into 3 classes, sparse (0,693 km2), moderate (0,562 km2), and dense (1,865 km2) with a total mangrove area of 3,12 km2. The confusion matrix accuracy test results were consisted with an accuracy value of 86.58% and kappa coefficient of 0.697. The correlation test of mangrove canopy cover percentage obtained from field data with NDVI value was conducted using a simple linear regression method. The results were 0.834 for coefficient of correlation (r) and 0.696 for coefficient of determination (R2).
Keyword: Pantai Bahagia Village, Density, Mangrove, NDVI, Remote sensing

Judul: Mapping Distribution and Density of Mangroves along the Belitung Timur Coastline Using Pleiades Satellite Imagery
Abstrak: Ekosistem mangrove di pesisir Belitung Timur mengalami penurunan luasan akibat dialihfungsikan menjadi area tambang timah oleh masyarakat. Penelitian ini bertujuan memetakan sebaran dan kerapatan mangrove di pesisir Belitung Timur dengan pendekatan penginderaan jauh dan Sistem Informasi Geografis. Kerapatan mangrove ditinjau dengan menghitung persentase tutupan kanopi mangrove menggunakan metode hemispherical photography dan analisis Normalized Difference Vegetation Index (NDVI). Selain itu, metode pixel-based classification dan Object-Based Image Analysis (OBIA) digunakan untuk mengklasifikasikan citra Pleiades. Hasil menunjukkan dominansi tingkat kerapatan mangrove di lokasi berdasarkan nilai hemispherical photography adalah sedang. Sementara, nilai kerapatan mangrove menggunakan analisis NDVI didominasi oleh kelas rapat. Hasil uji akurasi menggunakan confusion matrix antara kerapatan mangrove hasil NDVI dengan tutupan kanopi hasil data lapang menunjukkan nilai overall accuracy (OA) sebesar 88%. Analisis regresi linear sederhana menunjukkan bahwa hubungan persentase tutupan kanopi mangrove dengan nilai NDVI menghasilkan korelasi yang kuat dengan nilai koefisien korelasi (r) sebesar 0,801 dan nilai koefisien determinasi (R2) sebesar 0,642., The extent of mangrove ecosystems on the coast of East Belitung has diminished as a consequence of their conversion into tin mining areas by the local community. The objective of this study was to map the distribution and density of mangroves on East Belitung's coast using remote sensing and geographic information system (GIS) approaches. Mangrove density was quantified by calculating the percentage of mangrove canopy cover using hemispherical photography and a Normalized Difference Vegetation Index (NDVI) analysis. Moreover, pixel-based classification and object-based image analysis (OBIA) techniques were utilized to categorize the Pleiades images. The results demonstrated that the predominant level of mangrove density in the area, as determined by hemispherical photography, was classified as medium. In contrast, the NDVI analysis indicated that the dense class constituted the majority of the mangrove density values. The results of the accuracy assessment, conducted using a confusion matrix between mangrove density derived from NDVI and canopy cover data obtained from field observations, demonstrated an overall accuracy (OA) value of 88%. Simple linear regression analysis revealed that there was a strong correlation between the percentage of mangrove canopy cover and NDVI values, with a correlation coefficient (r) of 0.801 and a coefficient of determination (R2) of 0.642.
Keyword: NDVI, Belitung Timur, hemispherical photography, mangrove, Pleiades

Judul: Karakteritsik kimia dan organoleptik tablet effervescent putih telur bersitarasa lemon dengan konsentrasi effervescent mix yang berbeda
Abstrak: Egg is an animal origin food product which has high nutritional value especially protein. Cholesterol content of eggs is only found in egg yolk, on the other hand albumen does not countain cholesterol at all but high content of protein, so it can be used as a free cholesterol-protein sources. The application of albumen as egg instant drink effervescent tablet can be an alternative of protein source for people who need free-cholesterol diet. It can also become an egg product diversification.
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