Judul: Klasifikasi Pemukiman Kumuh di Wilayah DKI Jakarta Menggunakan Decision Tree
Abstrak: Jakarta as the capital of Indonesia has a high level of urbanization, causing a high rate of population density. High population growth in a small area tends to create a slum in the area. So far, the Statistics Central Bureau (BPS) has conducted a survey of the slum areas, but the method used is still quite subjective. To reduce the problem of subjectivity, this study aims to apply Decision Tree in classifying the slum areas in Jakarta and determine the accuracy of the classification process. The data used in this study consisted of 10 parameters, namely, population density, building layout, construction of houses, residential ventilation, building density, state of roads, drainage/sewerage, water consumption, human waste disposal, and waste management. There were 320 sample data collected using stratified random sampling. The data were divided into 2 groups: training data and testing data. Training data were used to construct a Decision Tree, while testing data were used to test the tree. Testing process used 10-fold cross validation resulting in an accuracy of 69.7%, 68.8%, and 67.4% for confidence factors of 0.1, 0.2, and 0.3, respectively.
Keyword: Classification, Decision Tree, Slum Area, Stratified Random Sampling

Judul: Analisis faktor-faktor yang mempengaruhi kemiskinan di DKI Jakarta (Studi komparatif di pemukiman kumuh dan tidak kumuh)
Abstrak: Penelitian ini membahas tentang kemiskinan di DKI Jakarta secara spasial yaitu RW kumuh dan RW tidak kumuh. Tujuan utama dari penelitian ini adalah (1) menganalisis faktor-faktor yang mempengaruhi kemiskinan dan (2) menguraikan program pengentasan kemiskinan yang telah dilakukan. Penelitian ini menggunakan model pilihan diskrit (discrete choice models) yaitu model regresi logit dengan data utama Susenas Kor 2004. Hasil utama penelitian ini adalah (1) angka kemiskinan di RW kumuh lebih tinggi dibandingkan dengan RW tidak kumuh (2) faktor-faktor yang mempengaruhi kemiskinan dengan mempergunakan peubah-peubah yang sama menunjukkan bahwa adanya perbedaan pengaruh dari beberapa peubah pada masing-masing lokasi (DKI Jakarta secara umum, RW tidak kumuh dan RW kumuh) (3) pelaksanaan penanggulangan kemiskinan sudah banyak menyentuh faktor-faktor yang mempengaruhi kemiskinan, namun pelaksanaannya belum dibedakan secara spasial serta masih menemui berbagai kendala. Pemerintah Provinsi DKI Jakarta dalam menanggulangi kemiskinan perlu menyesuaikan dengan lokasi tempat tinggal penduduk miskin. Demi keberhasilan pelaksanaan penanggulangan kemiskinan melibatkan kelembagaan lokal.
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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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