Judul: Kesesuaian Klasifikasi Ruang Terbuka Hijau menggunakan Citra Landsat ETM+ dengan RTRW Provinsi DKI Jakarta
Abstrak: Jakarta Provincial Government determine that the proportion of green open space is as much as 30% Jakarta Province land area. It is stated in The Regional Spatial Plan of Jakarta that was enacted in 2012 and prevail to 2030. The objectives of this research are to analyze the results of land cover classification changes using Landsat ETM + imagery in Jakarta Province, and to compare the classification result toward the green open space area in The Regional Spatial Plan of Jakarta between 2000 and 2012. The result showed that land cover changes in Jakarta mostly happens on the green open space area, which declined by 16.3%. Land suitability analysis of green open space that set out in the Regional Spatial Plan of Jakarta compared to the classification results showed that the proportion of Jakarta green open space in 2000 reached 36%, while for 2004 and 2012 the precentage of green open space as much as 27.5% and 25.5% , this results is not in accordance with the standard of green open space in Jakarta Regional Spatial Plan described in DKI Jakarta Provincial Regulation No. 1 of 2012, that is equal to 37.8%
Keyword: urban development, green open space, land cover, The Regional Spatial Plan of Jakarta

Judul: Evaluation of Green Open Space Availability and  Green City Concept Implementation in DKI Jakarta Province
Abstrak: Provinsi DKI Jakarta dengan peningkatan kegiatan pembangunan yang tinggi, membawa implikasi pada alih fungsi Ruang Terbuka Hijau (RTH) perkotaan menjadi lahan terbangun. Pentingnya keberadaan RTH tidak dapat dilepaskan dalam mendukung pengembangan konsep kota hijau di DKI Jakarta. Tujuan penelitian ini adalah mengevaluasi ketersediaan RTH dan implementasi konsep kota hijau di Provinsi DKI Jakarta. Metode penelitian yang digunakan adalah analisis spasial berbasis Geographic Information System (GIS) dan remote sensing, analisis kualitatif dan analisis kuantitatif berbasis Asian Green City Index. Pengamatan dilakukan pada periode tahun 2000, 2010, dan 2020. Hasil penelitian menunjukkan terjadi penurunan ketersediaan RTH, dari 33,70% pada tahun 2000, 23,47% pada tahun 2010, dan 19,50% pada tahun 2020. Pada penerapan konsep kota hijau, terjadi peningkatan performa DKI Jakarta, tahun 2000 performa berada pada tingkat below average (34,58%), average (44,85%) pada tahun 2010, dan menjadi above average (62,76%) pada tahun 2020. Hasil penelitian dapat menjadi referensi dalam merencanakan pembangunan di Provinsi DKI Jakarta agar tetap mempertahankan ketersediaan RTH dan berorientasi pada daya dukung lanskap., DKI Jakarta Province with a high increase in development activities, has an implication in the conversion of urban Green Open Space (GOS) into built-up land. The importance of urban green open space cannot be separated from supporting the development of the green city concept in DKI Jakarta. The purpose of this study was to evaluate the availability of GOS and the implementation of the green city concept in DKI Jakarta Province. The research method used is spatial analysis based on Geographic Information System (GIS) and remote sensing, qualitative analysis and quantitative analysis based on the Asian Green City Index. Observations were made in the period 2000, 2010 and 2020. The results showed that there was a decrease in the availability of GOS in the year of observation from 33,70% in 2000, 23,47% in 2010, and 19,50% in 2020. In the implementation of the green city concept, there is an increase performance of DKI Jakarta, from (34,58%) in 2000, average (44,85%) in 2010, and above average (62,76%) in 2020. The research results of the study can be used as a reference in planning development DKI Jakarta Province so that it remains oriented to maintain the availability of GOS and carrying capacity of the landscape.
Keyword: asian green city index, evaluation, green city, green open space

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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