Judul: Guidelines For Land Use Based On Land Carrying Capacity In Bogor Regency, West Java Province
Abstrak: Kabupaten Bogor sebagai salah satu wilayah penyangga DKI Jakarta mengalami perkembangan yang sangat cepat, karena posisinya yang dekat dengan DKI Jakarta baik dari segi geografis, perkembangan ekonomi maupun kelembagaan. Di wilayah Kabupaten ini, konversi lahan pertanian banyak terjadi, antara lain untuk pembangunan jalan tol dan perumahan. Fenomena pembangunan jalan tol yang menyebabkan mudahnya akses menuju DKI Jakarta menyebabkan kebutuhan lahan terbangun di Kabupaten Bogor meningkat, hal ini berujung pada perubahan penggunaan lahan yang masif di Kabupaten Bogor. Alih fungsi lahan yang terjadi tidak selalu sesuai dengan daya dukung lahan yang ada, oleh karena itu dibutuhkan evaluasi daya dukung lahan untuk melihat seberapa efektif penggunaan lahan suatu kawasan. Salah satu metode yang dapat digunakan untuk melakukan evaluasi daya dukung adalah evaluasi daya dukung berbasis kemampuan lahan. Penelitian ini telah dilaksanakan di Kabupaten Bogor pada bulan Agustus 2023 hingga April 2024, dengan tujuan utama menyusun arahan penggunaan lahan berbasis daya dukung lahan di Kabupaten Bogor. Untuk mencapai tujuan utama, diperlukan beberapa tujuan antara yaitu : (1) menganalisis perubahan penggunaan lahan/tutupan lahan di Kabupaten Bogor sejak tahun 2004 hingga 2020, (2) memprediksi kondisi penggunaan lahan/tutupan lahan pada tahun 2036, (3) mendelineasi kemampuan lahan di Kabupaten Bogor, dan (4) menghitung daya dukung berbasis kemampuan lahan di Kabupaten Bogor. Penelitian ini menggunakan metode klasifikasi dengan support vector machine untuk mendapatkan tutupan/penggunaan lahan Kabupaten Bogor yang merupakan data dasar dari penelitian ini. Prediksi tutupan/penggunaan lahan dianalisis dengan metode land change modeler dengan penerapan CA Markov. Kemampuan lahan diproses menggunakan metode matching berdasarkan data dasar lain yaitu data jenis tanah, kemiringan lereng dan curah hujan. Daya dukung lahan dianalisis melalui pembandingan kemampuan lahan dengan tutupan/penggunaan lahan aktual dan RTRW. Hasil analisis spasial menunjukkan bahwa perubahan tutupan lahan pada tahun 2012 sampai dengan 2020 didominasi oleh perubahan hutan menjadi permukiman seluas 14.287 Ha. Terdapat cukup banyak alokasi RTRW yang melebihi daya dukung dari kemampuan lahannya, hanya seluas 45.759 Ha dari luas wilayah Kabupaten Bogor dimana terdapat keselarasan antara pola ruang dan kemampuan lahannya. Sedangkan keselarasan antara kemampuan lahan dan tutupan lahan cukup tinggi dengan tingkat keselarasan sebesar 70,86% atau seluas 211.397,87 Ha, Bogor Regency, as one of the buffer zones for DKI Jakarta, is experiencing rapid development due to its proximity to Jakarta in terms of geography, economic growth, and institutional development. In this region, there has been significant agricultural land conversion, including for the construction of toll roads and housing. The phenomenon of toll road construction, which provides easier access to Jakarta, has led to an increased demand for developed land in Bogor Regency. This has resulted in massive changes in land use in the area. The land conversion that occurs does not always align with the land's carrying capacity, making it necessary to evaluate the land's carrying capacity to assess how effectively the land in a particular area is being used. One method that can be used for evaluating carrying capacity is a land capability-based assessment. This research was conducted in Bogor Regency from August 2023 to April 2024, with the primary objective of developing land use guidelines based on land carrying capacity in Bogor Regency. To achieve
Keyword: limiting factor, land capability, matching, support vector machine, spatial pattern

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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