Plastic waste is one of the environmental pollution materials on a global scale, especially in Indonesia, because plastic waste is difficult to decompose in the soil. One way to overcome this is by recycling plastic waste. However, this method is not very effective, only about a few percent can be recycled, and the rest ends up in landfills. Another way to do this is to use plastic waste to process it into fuel using a pyrolysis process. This research was conducted to determine the effect of the type of plastic (HDPE and PP) and the amount of heat absorbed by the cooling water by varying the diameter of the heat exchanger (1/2 inch, 3/4 inch and 1 inch) on the physical properties of fuel oil using the pyrolysis process. From the test results, the maximum reactor temperature produced from each type of plastic waste decreases as the heat exchanger diameter increases. However, the volume and calorific value of the fuel produced increases. Generally, the physical properties of fuel oil produced from the pyrolysis process of plastic waste are close to the physical properties of gasoline..

Keywords: fuel, pyrolysis, plastic, waste, physical properties.

Nowadays, women are facing various issues like rape and sexual harassment. This will affect the mental health of women throughout their lives or at least some period. These kinds of actions keep on increasing day by day. Even old age women are kidnapped and sexually abused. Nowadays, a newborn baby girl is also not safe or their parents are insecure about their safety. Looking forward towards this issue we need to make some application or device which will make women feel comfortable around society. So, in this project, we have planned to propose a device that will provide security and confirm the safety of the women. ESP32 Microcontroller, GSM, and GPS module are used to send a signal and live location of women to enrolled emergency mobile numbers in their contact. In addition, this project will also work in remote areas.

Keywords: women safety, screaming, Global system for communication, Global positioning system.