Instilling abstract concept of vibrations and waves into students requires proper learning media and this research intended to develop such learning media. The Android-based learning media on Vibrations and Waves topic for VIII grade junior high school students have been successfully created through the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model. The interactive research product entitled “Vibrations and Waves” packed in Application Package File (.apk) is downloadable on Google Play Store. The application contains texts, figures, and animations that can be accessed on the Objective, Materials, Simulation, Exercise, and Evaluation menu. This product has been through a validation test and product trial. The validation was performed by materials expert, media expert, and teachers while the trial was done to VIII grade junior high school students. There were three students in the One-to-One Trial, twelve students in the Small-Scale Trial, and twenty-eight students in the Field Trial. The validity and practicality of the product were respectively 4.24 (excellent); and 4.43 (excellent). Also, the students stated that this learning media could be used as an independent learning source while the teachers convinced that this product is a supportive school learning source.

The purpose of this study was to determine the effect of Return on Equity, Firm Size, Debt Equity Ratio and Price Earning Ratio on return defensive stocks with Dividend Policy as Variable Moderation in Manufacturing Companies. The study population was manufacturing sector companies listed on the Indonesia Stock Exchange from 2015 to 2018. There were 61 companies sampled using purposive sampling techniques. The analytical method uses multiple linear analysis and moderated Regression analysis. The results showed the Firm Size variable had a significant positive effect and the DER variable had no significant positive effect while the ROE and PER variables had no significant negative effect on return defensive stocks. The MRA test states that the Dividend Payout Ratio variable strengthens the effect of Firm Size on return defensive stocks while the ROE, DER and PER variables are weakened by the effect on return defensive stocks by dividend policy. Future studies are expected to use other variables that might increase or decrease stock returns.

This article describes the position of the Prophet Muhammad SAW as a communicator in the perspective of the Qur'an which is a designation from Allah SWT. This shows that the Prophet Muhammad SAW is an ideal patron communicator who can serve as a role model in communication. Some of the terms communicators carried by the Prophet Muhammad SAW in the Qur'an include da>in, muballigh, mubayyin, mubashshir, mundhir, mudhakkir, muallim, dan murabbin. These terms will be explained by referring to the meaning of the language, terms, and their usage in the al-Qur'an. Keywords: Communication, Communicator, Prophet Muhammad SAW