The demand for dry food and herbs is very high in the country. Most dried foods and herbs are exposed to bacteria during the drying process. To ensure the safety of dry food and herbs from being exposed to bacteria a heat house is needed. The Rumah…

These days, water filtration method commonly uses chemically made substances. This could be harmful and the sources are limited. Activated carbon that is used in water filters are made from charcoal. Charcoal is non-renewable and has only a finite…

As the future progresses, more and more difficulties are being advanced, however, as we deal with problems that humankind has created, why can't we deal with situations that are natural, such as communicating with people who struggle with hearing…