Judul: Bogor agricultural university student’s characteristics based on their national examination score and gpa
Abstrak: National examination (un) has been established as a standard to pass high school since 2002 compentency during high school. It indicated an assumption that good un score would provide good achievement in college as well. Student’s achievement at university is indicated by gpa (grade point average). Theoretically, un score and gpa should have high positive correlation. However, this is not automatically true. In 2010, more than 30% student who had high un score got gpa tpb less than 2.50. This percentage tends to decrease in 2011 and 2012. By using pearson correlation test, there was a significance correlation between un score and gpa tpb even the coefficient was weak and positif. Based on multiple correspondence analysis in the last three yearswith a purpose to improve the quality of education in indonesia and measure student’s, characteristics of student who had high un score and high gpa tpb were from faculty fateta, fmipa, fem, and fema, from department with high popularity level such as itp, stk, agb, ilkom, gizi, tin, sil, and eksyar, and came from banten, dki jakarta, and west java. Whereas the characteristics students who had high un score but got low gpa tpb were from veterinary faculty, enrolled ipb through utmi, and had higher education and higher income family background.
Keyword: gpa, multiple correspondence analysis, un score

Judul: Identification of Affecting Factors on the GPA of First Year Students at Bogor Agricultural University Using Random Forest
Abstrak: Academically, the success of a student can be demonstrated by Grade Point Average (GPA). The performance of a student can be seen from the academic achievements, potential and motivation from themselves. Success in obtaining a high GPA can not be separated from the factors that affect the intellectual factor (the score of final examination in high school) and non-intellectual factors (gender, enrollment scheme to university, age when enrolled to university, senior high school status, etc). The data used for this research is the secondary data obtained from Student Affairs Directorate Bogor Agricultural University. Random forest method is an ensemble classifier using many decisions tree models. It can be used for classification or regression. This research is aimed to determine the size of the random forest and sample size of the explanatory variables that produces random forest with high prediction accuracy and stability that can identify the most important influential factors in student's academic achievements (GPA). High accuracy and stability can be obtained if size of the explanatory variable (m) and the size of the random forest (k) is determined by the right value. The values of m used in this study are 3, 4, 5 and 6. The values of k used in this study are 100, 500 and 1000. The smallest misclassification rate is at m = 4 and k = 100 with misclassification rate is 39.36%. Optimum random forest trees is used to get the best identifier variables. The most influential variable of the GPA of student at Bogor Agricultural University in the first year study by ranking criteria used Mean Decrease Gini (MDG) value of random forest.
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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