Judul: Karakterisasi kawasan permukiman perkotaan dan perdesaan di Wilayah Tangerang
Abstrak: This study aims to characterize housing that growth in urban and rural areas of Tangerang regions. Sprawling is one of the major driving forces of land-use/land-cover change in the Jakarta Metropolitan Areas. The sprawl defines as situation of unauthorized and unplanned development, normally at the fringe areas of cities, especially haphazard construction of homestead, commercial areas, industrial areas and other non-conforming land-uses. It is along the major lines of communications or roads adjacent to city boundaries. The forms of sprawl in Jakarta Metropolitan Areas are pre dominated by unplanned housing development. In this paper we identify factors to determinate four built up area pattern in Tangerang. The research was conducted from June to September 2011. Various methods were employed to characterize the residential growth. Administrative boundaries and physical growth used to classify four category residential patterns. Box plot and t-test were applied to describe four typologies based on several assumed important variables. Factor analysis and discriminant analysis were utilized to characterize the residential pattern. The result shows that sprawl phenomenon was not only found in periphery but also could be found in either urban and rural area. There were six significant factors discriminating spatial pattern of residential development i.e.; land uses, spontaneous development, accessibility, population, facilities and industrial development. Administrative status did not dictate empirical land use pattern, whether being urban or rural one.
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Judul: Dinamika Perluasan Perkotaan : Hubungan Perubahan Tutupan Lahan dengan Bentuk Perkotaan Wilayah Kabupaten Tangerang
Abstrak: Kabupaten Tangerang tergabung dalam wilayah metropolitan Jabodetabek mengalami fenomena perluasan perkotaan akibat proses urbanisasi dan suburbanisasi yang mengarah terjadinya urban sprawl dan pertumbuhan fisik perkotaan semakin tidak terkendali. Informasi urban form diperlukan agar proses perencanaan pengembangan wilayah dapat terarah dan berkelanjutan berdasarkan karakteristik pola spasial yang terbentuk. Perubahan tutupan lahan sebagai dampak perluasan perkotaan diamati pada level kecamatan setiap wilayah pengembangan (WP) berdasarkan hirarki struktur ruang RTRW Kabupaten Tangerang yang dibagi menjadi 3 wilayah pengembangan yaitu WP I, II dan III. Penelitian bertujuan: 1) menganalisis trend urban expansion dalam bentuk perubahan tutupan lahan, 2) mengidentifikasi karakteristik urban form dan 3) menganalisis keselarasan antara tutupan lahan dengan pola ruang RTRW Kabupaten Tangerang. Analisis perubahan tutupan lahan dilakukan dengan overlay peta tutupan lahan tahun 2015 dan 2020 serta tabulasi matriks perubahan tutupan lahan (crosstab), karakteristik urban form di analisis dengan Spatial Metric menggunakan variabel density, continuity, clustering, dan shape serta analisis keselarasan dilakukan dengan overlay antara peta tutupan lahan dengan RTRW Kabupaten Tangerang. Perubahan tutupan lahan terjadi peningkatan luas pada tutupan lahan terbangun dan badan air serta penurunan luas pada tutupan lahan kering, sawah dan vegetasi lainnya. Karakteristik urban form tutupan lahan sawah dan lahan terbangun berdasarkan WP I berbentuk sprawl. Karakteristik urban form berdasarkan WP II tutupan lahan terbangun konstan dan lahan sawah berbentuk compact. Tutupan lahan terbangun WP III berbentuk sprawl, sedangkan pada lahan sawah berbentuk compact. Nilai keselarasan Kabupaten Tangerang termasuk kategori sangat tinggi (88%) dengan jenis ketidakselarasan terluas yaitu peruntukan kawasan pertanian dengan tutupan lahan terbangun (Kawasan Pertanian-LTB)., Tangerang Regency which is part of the Jabodetabek metropolitan area experiencing the phenomenon of urban expansion due to the process of urbanization and suburbanization can lead to urban sprawl and uncontrolled urban physical growth. Urban form information is needed so that the regional development planning process can be directed and sustainable based on the characteristics of the spatial pattern that is formed. Changes in land cover as a result of urban expansion are observed at the sub-district level of each development area (WP) based on the spatial structure hierarchy of the Tangerang Regency RTRW which is divided into 3 development areas, namely WP I, II, and III. This research aims: 1) to analyze urban expansion trends in the form of land cover changes, 2) to identify the characteristics of the urban form, and 3) to compare the characteristics of the urban form to the RTRW of Tangerang Regency. The land use change analysis carried out with 2015 and 2020 land cover maps overlay and change matrix tabulation land cover (crosstab), urban form characteristics were analyzed using Spatial Metric density index, continuity, clustering/fragmentation, and shape, and alignment analysis were carried out by overlaying between maps land cover with RTRW Tangerang Regency. Changes in land cover increased the area of built-up land and water bodies and a decrease in the area of dry land, paddy fields, and other vegetation. Characteristics of urban form on paddy field cover and built-up land based on WP I are in the form of sprawl. Characteristics of urban form based on WP II constant built-up land cover and compact
Keyword: compact, development area, land conversion, spatial metric, sprawl

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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