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All Journal Mesin Psychology, Evaluation, and Technology in Educational Research
Hermawan, Hendra
Mesin
Computer Science & IT Education Mechanical Engineering Social Sciences

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Evaluation on the Temperature and Calcination Time During Sol-gel Coating of TiO2 on Iron Foam substrate Ramdan, Raden Dadan; Haris, Luqman; Hermawan, Hendra; Sunendar, Bambang
Mesin Vol 26, No 1 (2017)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1966.381 KB) | DOI: 10.5614/MESIN.2017.26.1.1

Abstract

Iron foam is iron based material which is widely applied due to its unique properties. However since corrosion is also a problem for this material, coating with innert material is required in enhancing its applications. In the present research, TiO2 coating is performed on iron foam suface by sol-gel dipping method. Focus is given on the study of the effect of calcinations temperature and time on the coating characteristics. TiCl4 is used as the precursor with concentration of 0.3 M, added with 1M HCl solution and chitosan soluation with concentration of 1%. Calcination is performed at temperature of 400, 500 dan 600oC and calcinations time of 1 and 3 hours inside controlled gas furnace using nitrogen atmosphere. Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) characterization data shows that TiO2 particles form on the iron foam substrate. SEM characterization on the sample heated at 400oC and heating time of 1 hour shows the formation of nano particle titania (0.06 μm) which is homogeneously distributed with less agglomeration than others and considered as the best sample in the present research. As the temperature and time of calcinations increase, more inhomogeneous particle distribution and bigger particles form.
The use of controversial public issues with video and macromedia flash player media in civic education learning Hermawan, Hendra; Samsuri, Samsuri; Kurniawati, Diah Putri; Sofyaningsih, Vinni; Prasetyo, Danang
Psychology, Evaluation, and Technology in Educational Research Vol 1, No 1 (2018)
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (266.336 KB) | DOI: 10.33292/petier.v1i1.2

Abstract

The study aimed to find out the effect of controversial public issue learning models with video and Macromedia flash player media on students’ critical thinking skills in Civic Education subjects at SMA Negeri 1 Rancah. The particular research was a quasi-experimental research using pretest, posttest control group design. Data analysis techniques used independent t-test and one-way ANOVA test. The results showed that critical thinking skills on students taught using Controversial Public Issues model with video media had a significant effect on the critical thinking ability. This finding might be seen from the one-way ANOVA test results that the Fcount> Ftable (61.146> 3.13) or the p-value is lower than 0.05 (p = 0.000 <0.05) and the gain score. The experimental class 1 obtained a gain score of 0.49 in the category of "medium" effectiveness. The experimental class 2 obtained a gain score of 0.34 in the category of "medium" effectiveness. The control class obtained a gain score of 0.00 in the category of “low".
Co-Authors Bambang Sunendar Danang Prasetyo, Danang Haris, Luqman Kurniawati, Diah Putri Luky Adrianto Ramdan, Raden Dadan Sofyaningsih, Vinni