Coating techniques are important parts in the development of nano material technology. In this paper, the development of coating technology based on microcontroller using dip coating is presented. Arduino microcontroller is implemented to control the immersion time and the speed of withdrawal of material out of the coating fluid through a stepper motor. In addition, the withdrawal speed can be digitally entered through a keypad with a value range of 0.02 mm/s to 10 mm/s. The experiment results showed the percentage of accuracy and precision of the microcontroller based dip coater was very high. Based on these results, the developed dip coater is satisfied to be used in the development of nanotech materials

This research was concerned by students' low motivation on social studies. This research aims to determine the difference of the students' learning motivation taught using Quantum Teaching and conventional teaching model on social studies. This research applied quasi-experiment with nonequivalent control group design. The samples were taken with simple random sampling technique, with samples as many as 44 students. Analysis of data used t-test. The result showed that the students' motivation with Quantum Teaching were higher than conventional teaching model on social studies, where by using statistical test, the tvalue was 5,624 and ttable was 2,089 or knowable tvalue> ttable. It can be concluded that Quantum Teaching model has positive effect to improve students' learning motivation.

This study aims to find out what are the constraints on the role of women in reducing the risk of the earthquake and tsunami disaster in Air Tawar Barat Village. women were the most vulnerable group when the earthquake and tsunami occurred. In the research conducted using a qualitative descriptive method. The technique of determining research informants by means of purposive sampling. Data collection techniques by means of observation, interviews, and documentation. Data analysis techniques are reduction, data presentation and conclusion. Technique of validity of research data is source triangulation. There are 2 obstacles faced by the role of women in reducing the risk of the earthquake and tsunami disaster in Air Tawar Barat Village, namely internal and external constraints. The results show that the internal constraints are that BPBD has not integrated gender issues into disaster risk reduction activities, while the external obstacle is the lack of understanding, awareness, vigilance and concern for the women community.

One effort that can be done to solve problems in learning is to develop learning media on the right method. One of the learning problems found was the lack of student interest in learning social studies because the methods and media used were not appropriate. Social studies learning has a lot of material descriptions and contains abstract things if delivered using methods that cannot involve students in learning and media that are less attractive, it will make students less enthusiastic to learn. Therefore, this development research aims to produce an animated video product on the inquiry method for social studies learning for Class IX SMP that is valid, practical and feasible. This research uses a type of development research or also known as Research and Development (R&D). The development model used is the ADDIE model. The ADDIE model consists of five stages of development, namely: (1) Analysis (Analysis), (2) Design (design), (3) Development (development), (4) Implementation (application), (5) Evaluation (evaluation). Products in the form of animated video media will be tested for the validity of the media by two validators and the validity of the material will be tested by one validator. Practicality test was conducted on 21 students of class IX. 4 at SMPN 1 Tanjung Raya. Based on the results of the product validity test, it shows that the media is said to be very valid with a proportion of 92.06%, according to the proportion of experts who are right at 90%. In the final results of the practicality test of learning media products, it is categorized as very valid with a percentage of 92.38%. In accordance with these results, it can be said that the learning animation video media on the inquiry method for social studies learning for class IX SMP is declared valid; practical and feasible to use.