The scientific development process can be carried out with STEM (Science Technology Engineering Mathematics) education where this interdisciplinary approach trains students to learn where the concept of science is combined with the context in applying science, technology, engineering, and mathematics. The purpose of the study is the development of Interactive Book Augmented Reality (IBAR) for Lesson Physics on STEM. The research method is the ADDIE Model which consists of the stages of Analysis, Design, Development, Implementation, and Evaluation. The sample for the implementation of IBAR used in the study amounted to 90 students aged 19-22 years from a province in Indonesia. The results showed that IBAR contributed to students’ concepts in physics. In the questionnaire given to students, information was obtained that the IBAR application was more useful, realistic, and interesting for their learning; help them understand and analyze problems and STEM scenarios. It has been suggested that IBAR technology could be a potent and effective tool to enable Lesson Physics students in the STEM process. In addition, the implications of using IBAR for physics education and recommendations for further studies are also discussed in this study.
The study developed a digital text security system by inserting the classified message or text into digital audio (stego audio) with the least significant bit (LSB) steganography and audio feature extraction. The text bits were inserted into each cover audio frame based on the value of feature extraction energy and zero-crossing rate (ZCR). The study has demonstrated that the least significant bit and audio feature extraction can cover the digital text in stego audio and then be extracted back to the original digital text. There is a small difference in feature extraction energy value between stego audio and cover audio. While there is no difference in feature extraction zero-crossing rate between stego audio and cover audio. The study also measured signal-to-noise ratio (SNR); the detected noise in stego audio because of the change in the least significant bit. The SNR is 111.97 – 130.00 dB.
An smartphone application which are used as learning material on the subject of temperature and heat have been developed. The development process is carried out using research and development methods with reference to the Analysis-Design-Development-Development-Implementation-Evaluation development model. The novelty of learning material that was developed was to use inquiry-based learning in the writing system. In addition, the learning material which developed also includes questions that refer to higher-order thinking. The results of the validity tests show the adequacy of the learning materials with the level of difficulty of the learning materials in high school. The learning material has been tested in SMA 16 Jakarta. The test results show an increase in learning outcomes shown by the gain score of 0.4.
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