Judul: Profil Migrasi Menurut Umur
Abstrak: Di dalam kehidupan sehari-hari kita tidak akan pemah terlepas dari 3 pemlasalahan, yaitu masalah fertilitas, mOltalitas, dan migrasi, Dimana ketiga permasalahan ini mempakan komponen penting dalam proyeksi penduduk Tetapi yang akan dibahas disini hanyalah permasalahan mengenai migrasL Dimana model yang digunakan dalam migrasi ini terdiri atas model migrasi prapekeIja dan model migrasi tenaga kerja produktif Dari kedua model tersebut akan diperoleh rasio ketergantungan anak-dewasa, Sedangkan untuk analisis kepekaan, model yang digunakan adalah model migrasi tenaga kerja produktif, Dan dari model tersebut akan diperoleh tingkat keasimetrisan dengan menggunakan fungsi skewness.
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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: 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