Reactor for Removing Pollutants by Sunlight
We developed a reactor by employing TiO2 photocatalys for removing organic pollutants in water. This was a very long journey of research, starting from about 2009. We finally able to … Read More
Early Warning System for Landslides
We developed a landslide early detection system based on radio waves transmission. The ground movement sensor and a transmitter antenna are installed on hilltops that have a potential for landslides. … Read More
How to Correct the Qibla Direction
Many mosques in Indonesia have less precise qibla direction. The deviations of qibla direction can reach up to seven degrees. Whereas, every one degree of deviation causes an error from … Read More
Let’s Do Experiment in an Aircraft Cabin
I flight Garuda Indonesia from Denpasar to Makassar in 2014. The plane had inflight entertainment (IFE) inside so every passenger can enjoy entertainment privately during flight. Every passenger has his/her … Read More
Transparent Mask for Ihram during Hajj and Umrah
I got this idea when performing Hajj with my wife in 2014. We were waiting for days of hajj in Mecca. Everyday we go back and forth between the hotel … Read More
Washing, Wringing, and Drying Clothes under Sunlight
After washing clothes, of course, we need to squeeze (wring) before drying. This is intended to reduce the water content inside the cloth so that cloth will dry immediately when … Read More
Physics Behind Fireworks Bending
At the night before Eid, takbeer night, children often play fireworks. This has become a culture in Indonesia. Some fireworks are thrown and some are held by hand. Fireworks that … Read More
Physics Behind the Curling Threads
The curling thread is a term that is very familiar to us. Ther are so many events that are related to the shapes of the curling threads. Usually, such events … Read More
A method for identification of past document falsification
The gradual decline in the motor system and in general body functions, such as cognitive, kinematic, working memory, motor performance, and neuromuscular functions, as age increases will change a signature’s … Read More
My Publication in Scientific Journals until 2022
111. Ardi Khalifah and Mikrajuddin Abdullah, Magnetic Fields Produced by “Seen Arc” and “Unseen Arc” of Ideal Solenoids are the Same in Magnitude but Opposite in Direction, Physics Education (accepted, … Read More