Judul: Analisis Pola Spasial Pertumbuhan Pengkotaan di Kabupaten Bogor
Abstrak: Kabupaten Bogor merupakan bagian dari Megapolitan Jabodetabekpunjur yang terus mengalami urbanisasi pesat hingga telah menjadi kabupaten dengan penduduk terbesar di Indonesia, yaitu sebanyak 5,9 juta jiwa pada tahun 2019. Urbanisasi telah menyebabkan berbagai masalah, diantaranya tidak meratanya sebaran penduduk dan meningkatnya lahan terbangun. Penelitian ini bertujuan mendeskripsikan perubahan pola spasial sebaran kepadatan penduduk dan persentase lahan terbangun, analisis pertumbuhan penduduk dan lahan terbangun, serta analisis hubungan antara jumlah penduduk dengan luas lahan terbangun. Data yang digunakan terdiri dari data penduduk, citra Landsat, dan peta jaringan jalan. Metode analisis mencakup analisis statistik deskriptif, klasifikasi terbimbing dengan metode random forest, analisis buffer, analisis clustering, dan analisis korelasi dan regresi sederhana. Hasil penelitian menunjukkan pola spasial peningkatan kepadatan penduduk dan lahan terbangun tertinggi dalam periode 2000-2020 menyebar di sepanjang perbatasan dengan wilayah Kota Depok dan Kota Bogor serta di sepanjang jalur jaringan jalan kolektor dan tol maupun kereta api. Dari 7 klaster tingkat urbanisasi desa, klaster dengan tingkat urbanisasi tertinggi (klaster 6 dan 7) mengalami proses urbanisasi yang cepat pada tahun 2000-2010 dan 2010-2020 yang ditandai dengan pertumbuhan penduduknya diatas 6 persen/tahun. Pertumbuhan lahan terbangun tertinggi terjadi pada desa-desa dengan tingkat urbanisasi menengah (klaster 4) pada tahun 2000-2010 kemudian polanya menurun pada setiap klaster pada periode kedua pengamatan (2010-2020). Sebaran lahan terbangun di sekitar jalan mencapai maksimum pada jarak 2 km dari jalan tol dan kolektor dan 4 km dari jalan tol. Diperkirakan hubungan antara lokasi permukiman dengan jalan kolektor adalah melalui fasilitas jaringan lokal. Jumlah penduduk cenderung berbanding lurus dengan luas lahan terbangun dengan disertai kecenderungan urban sprawl yang meningkat.
Keyword: Bogor Regency, Road networks, Megapolitan, Urbanization, Spatial  patterns

Judul: Analisis Perubahan Penggunaan Lahan, Pola Ruang dan Tingkat Perkembangan Wilayah di Kota Bogor
Abstrak: Bogor City is located 60 kms from the Indonesian Capital Jakarta and 120 kms from Bandung the capital of West Java Province. Strategic agricultural land and inexpensive land price have encouraged stakeholders to invest in agricultural sector and also non agricultural sector. Land use conversion is inevitable, although the goverment has set up the regulation to control land usage (Act No 26 year 2007). This research are conducted: (1) To analyze existing land use of Bogor City (land use in 2014). (2) To analyze the land use change in period of 2005-2012. (3) To analyze the consistency of existing land use compare to land allocation in the RTRW of Bogor City. (4) To identify regional development hierarchy level in Bogor City. (5) To determine factors that influencing land use change. This research was started with land usage map designing which retrieved from digitized result on administrative map 1: 5000 scales to ikonos image of Bogor City in years of 2005 and 2012. Consistency and inconsistency is obtained by overlaying land use map in 2012 and land allocation map of Bogor City years 2011-2031 (RTRW map). PODES is used to determine the regional hierarchy level by multiple regression method. Existing land use classified into 9 land use, in sequence from the largest one are: mixed garden, non-wellarrang ed settlement, paddy field, well arranged settlement, trade area, water body, dryland farm, open field and goverment office area. Dryland farm land use changes into 2 land use, open field land use change into 6 land use and paddy field land use change into 6 land use. The consistent existing land use compare to RTRW is 40.95% while inconsistence existing land use is 59.05%. During period of 2006 to 2012, most of regional development hierarchy in Bogor City are the relative constant hierarchy (42 villages/61.8%). 12 villages (17.6%) are increase in the hierarchy whilst 14 villages (20.6%) are decrease in the hierarchy. Factors that influencing land use change of Bogor City in period of 2005-2012 are: area of agricultural land in the years of 2005, social facilities growth, and economy facilities growth
Keyword: Spatial Plan., Regional Hierarchy, Land Use Inconsistency, Land Use Conversion

Judul: Synthesis of Apatite - Chitosan Composite Using Duck Eggshell and Chitosan with Temperature and pH Control
Abstrak: Composite of apatite-chitosan was prepared by using chitosan as polymer matrix. Calcium phosphate was prepared from CaO and (NH4)2HPO4, which the ratio Ca : P had to be 1.67. Chitosan is produced by deacetilase from biopolymer chitin. Duck eggshell (95% CaCO3) as starting material was converted to be calcium oxide (CaO) through calcinations with temperature 1000oC for 5 hours. In-situ and ex-situ methods were prepared from apatite and chitosan (dissolved with acetate acid 2%). Calcium phosphate prepared for bone implantation, but it is too fragile and brittle to be implant into the body. So addition of chitosan can decrease crystalinity and increase mechanic characteristic (tougher). Composite apatite-chitosan was resulted by fast precipitation. Fast precipitation was held in a breaker glass with nitrogen atmosphere, under controlled temperature at 37oC and pH 7, in order to increase amount of hydroxyapatite. Precipitation with CaO which was dropped by (NH4)2HPO4. Hydroxyapatite and chitosan were appearing at samples with in-situ and ex-situ methods which indicating by peak matching of XRD (closed lattice parameter, crystal size), overlapping at FTIR spectra and supporting by SEM picture (homogenous and agglomerated particle). However, it still needs further research to examine biocompatibility osteoconductive degree of sample by in-vivo and in-vitro test.
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