Judul: Pola Sebaran Spasial Pajak Bumi dan Bangunan serta Harga Lahan di Kecamatan Dramaga
Abstrak: Land is an important factor of life to support food production, to balance ecology, and to ensure settlement, industry, and other facilities development. The increasing demand of land lift up its value following economic principle. Alongside land use patterns also influence land value which consequently each land use has a different value and price. The existence of Bogor Agricultural University in Dramaga Subdistrict is estimated influencing land price formation in surrounding the area. This research aims to analyze spatial distribution of land taxation in Dramaga District, to configure spatial distribution of land use in Dramaga District, to map and to analyze the spatial distribution of regional growth in Dramaga District, and to discover the effect of land taxation and the existence of Bogor Agricultural University as an education center to land price formation in Dramaga Subdistrict. In this research, we utilised Moran index, spatial analysis, simple hierarchy analysis, and multivariate regression. Moran index of land taxation shows that spatial distribution in the early observation (2006-2008) tended to cluster, but at the end of year (2009) it was likely to scatter. There was an indication that the higher value of land tax, than the smaller number of plots. The statistic G shows that land fragmentation was significantly clustered at certain location. The spatial pattern of paddy field distribution was more centered with Moran Index at 0,192 compared to residential land use with Moran Index about 0,045 in 2010. From G statistic test, the most developed village was at kampongs of Babakan Village and Dramaga Village. Then the result of multiple regression analysis shows that significant determinants of land price at 95% confidential interval were land area, land and building tax, eucledian distance to Bogor Agricultural University, and elevation.
Keyword: education center., G statistic, moran index, spatial distribution, regional development, land and building tax, Land use

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: 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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