Judul: Pemetaan Provinsi di Indonesia Berdasarkan Peubah-Peubah Pendidikan
Abstrak: This paper provides a general overview about education in Indonesia and mapping of the provinces. The analysis is based on some educational variables, i.e. rough participation rate, pure participation rate, school participation, illiteracy rate, repetition rate, drop-outs rate and the average school duration. Provincial mapping is conducted by biplot analysis, which gives the following results. Based on the proximity among province and the interrelationship of province with educational variables, the provinces can be grouped into seven groups for elementary school, six groups for junior high school, and six groups for senior high school. The province of Papua has the highest illiteracy rate at all education levels being considered, i.e. elementary, junior, as well as senior high schools. On the other hand, the provinces of West Sumatra and West Papua have relatively high repetition rate. Moreover, the provinces of Jambi and Central Sulawesi have average values on all variables. This provincial mapping is expected to provide input in identifying the advantages and disadvantages of each province in order to improve the quality of national educational.
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Judul: Pemetaan Provinsi di Indonesia Berdasarkan Produk Domestik Regional Bruto Menggunakan Analisis Biplot
Abstrak: Government has a responsibility for maintaining welfare development of its people. One of the indicators that can be used to measure human development is the human development index (HDI). This index was created based on three dimensions, i.e. dimension of life expectancy, knowledge and standard of decent living. This paper provides an overview of mapping the provinces based on independent sectors of business field. The provincial mapping is done using biplot analysis. Biplot analysis presents a low-dimensional graphical display, which describes relationship between high-dimensional variables and objects. Provincial mapping can be used to obtain an overview of development between provinces. The result of biplot analysis is able to explain 85.22% information contained in the data, which is called its goodness of fit. Based on the biplot visualization, five groups of provinces are obtained. In the first group, Jakarta has a value above average on the financial sector. On the second and third groups, the agricultural sector contributes significantly to gross regional domestic product. Meanwhile, in the fourth group, Riau and East Kalimantan are the biggest contributor to the trade sector. Finally, in the fifth group, all of the provinces have gross regional domestic product value below the average in all sectors.
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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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