Judul: Analisis Migrasi dengan Model Loglinear dan Iterative Proportional Fitting
Abstrak: Migration is one of demographic components that affect the population dynamics in a region. Data of migration flow can be presented in a contingency table. This paper discusses the application of loglinear model to describe the spatial structure of migration. The analysis of spatial structure of migration requires data on migration flows from a region of origin to its destinations. If the migration data are complete, then the parameters can be obtained directly. But, on the other hand, if the data are incomplete, then the parameters will have to be obtained by following steps. Firstly, assign the complete data as the standard value. Secondly, analyze data with the corresponding loglinear model. Finally, predict the incomplete values using iterative proportional fitting. A case study is conducted on migration flow data of four regions. Prediction of incomplete migration flows using iterative proportional fitting shows that the result is close to the actual data. Parameters of multiplicative loglinear model with cornered effect indicate that the first region is the region that has the greatest odds ratio. Whereas, parameters of multiplicative loglinear model with mean effect indicate that the third region is the most important region as origin and destination.
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Judul: Model Skedul Migrasi dan Aplikasinya dalam Proyeksi Penduduk Multiregional
Abstrak: Negara Indonesia dewasa ini dihadapkan pada beberapa masalah kependudukan, antara lain jumlah penduduk yang besar, laju pertumbuhan penduduk yang pesat serta penyebaran penduduk yang tidak merata. Pertumbuhan dan penyebaran penduduk dipengaruhi oleh hubungan tiga komponen demografi yaitu kelahiran, kematian dan migrasi. Dalam proyeksi penduduk, migrasi merupakan komponen penting selain faktor kelahiran dan kematian.Umumnya proyeksi penduduk hanya melibatkan komponen kelahiran dan kematian saja, karena menganggap bahwa migrasi bersih suatu negara mendekati nol. Namun demikian jika dilakukan proyeksi penduduk antar wilayah maka komponen migrasi tidak dapat diabaikan. Oleh karena itu masalah proyeksi penduduk secara multiregional yang melibatkan migrasi menjadi faktor penting untuk pengembangan wilayah, sehingga tingkat pembangunan dapat disejajarkan.
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Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4