Telah dilakukan rancang bangun alat peraga gerak harmonik sederhana berbasis arduino pada studi kasus sistem pegas. Alat peraga yang telah dikembangkan bertujuan untuk memvisualisasikan fenomena gerak harmonik sederhana dalam bentuk simpangan terhadap waktu, mengukur konstanta pegas, menyelidiki hubungan periode terhadap massa, dan frekuensi terhadap massa benda. Rancang bangun alat peraga dalam penelitian ini terdiri dari tiga bagian utama, yaitu perancangan perangkat keras (hardware), perancangan perangkat lunak (software) dan pengujian kinerja alat peraga yang dikembangkan. Rancang alat peraga gerak harmonik sederhana dikembangkan dengan memanfaatkan sensor ultrasonik untuk mengukur simpangan benda. Pengukuran simpangan dan waktu disimpan pada komputer (PC) melalui komunikasi serial dengan bantuan PLX-DAQ. Hasil pengukuran konstanta pegas dengan menggunakan alat peraga yang dikembangkan adalah sebesar  dengan kesalahan relatif. Hasil eksperimen juga menunjukan bahwa hubungan antara periode osilasi sebanding dengan akar kuadrat dari massa benda, sedangkan frekuensi osilasi sebanding dengan satu per akar kuadrat dari massa benda.

The development of a wireless sensor network system for temperature and humidity monitoring is described. The system is composed of two main parts, namely an end device and a coordinator. The end device consists of an SHT10 sensor, an XBee Pro RF module, an ATMega8535 microcontroller, and a battery. The coordinator consists of an XBee Pro RF module and an SIM900 GSM module. The temperature and humidity data were sent by the end device to the coordinator and they were forwarded to the web server via GPRS communication using the SIM900 GSM module. In order to the data stored in the database can be accessed in real time via the internet, a web server is developed by using CodeIgniter (CI). It was shown that each end device can communicate very well with the coordinator. Moreover, the data are received in accordance with the timing of delivery was given.

The purpose of this research is to increase students' motivation and cognitive learning outcomes through the application of physics learning media based on the game of snakes and ladders in senior high school class X related to the material of work and energy. The research method used is a pre-experimental type with a one-group pretest-posttest design research model. Data collection techniques are through test techniques for learning outcomes and questionnaire techniques for student motivation and responses. Data were analyzed based on paired sample t-test technique, N-Gain test, and percentage descriptive. The results of the research obtained an increase in students' cognitive physics learning outcomes based on the results of the t-count score smaller than t-table, a large increase of 38.39% (medium), student learning motivation increased from good category (78.63%) to very good (88.47%), while the students' responses were categorized as very good. Therefore, the use of snakes and ladders game media is effectively applied for learning in SMA class X on the material of work and energy.

Science learning is better related to nature through local wisdom since learners can gain more comprehension due to familiarity of occurring events through local wisdom based learning and they can preserve the local wisdom. This research aimed to identify physic concepts that occurred in the yarn processing using cotton by local society of None Fortress. The phenomenological design of qualitative research was undertaken in which the data triangulation technique comprised interviews, observation and documentation using an interview sheet, observation sheet and camera as instruments. The identification result of physic concepts in yarn production by None Fortress people covered Energy, Friction, Rotatory Motion, Circular Motion, Simple machine (Gear), Materials elasticity, vibration, measurement, capillarity, and radiation heat transfer. Based on the invented concepts, further research will expected to integrate the identification result in physic learning.

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