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Tuesday, January 24, 2023
Reactor for Removing Pollutants by Sunlight
Technical Design

Reactor for Removing Pollutants by Sunlight

Prof. Mikra December 14, 2019

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

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Early Warning System for Landslides
Technical Design

Early Warning System for Landslides

Prof. Mikra December 14, 2019

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

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How to Correct the Qibla Direction
Physics Behind Us

How to Correct the Qibla Direction

Prof. Mikra December 13, 2019

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

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Let’s Do Experiment in an Aircraft Cabin
Physics Behind Us

Let’s Do Experiment in an Aircraft Cabin

Prof. Mikra December 13, 2019

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

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Transparent Mask for Ihram during Hajj and Umrah
Physics Behind Us

Transparent Mask for Ihram during Hajj and Umrah

Prof. Mikra December 13, 2019

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

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Washing, Wringing, and Drying Clothes under Sunlight
Physics Behind Us

Washing, Wringing, and Drying Clothes under Sunlight

Prof. Mikra December 13, 2019

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

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Physics Behind Fireworks Bending
Physics Behind Us

Physics Behind Fireworks Bending

Prof. Mikra December 13, 2019

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

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Physics Behind the Curling Threads
Physics Behind Us

Physics Behind the Curling Threads

Prof. Mikra December 13, 2019

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

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A method for identification of past document falsification
Physics Behind Us

A method for identification of past document falsification

Prof. Mikra December 13, 2019

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

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What mine's

My Publication in Scientific Journals until 2022

Prof. Mikra December 12, 2019

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

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