This is the exit of Bangkok Don Muang Airport from Chiang Mai, waiting for the pick-up car from Silpakorn University. As usual, the airport is crowded with arriving tourists. It seems that Grab Taxi also picks up passengers here these days.

The next day, I checked my samples and teaching materials at the SCiUS office in the university. There is also my fault experiment sets.

After the inspection of the seismograph, the seismograph case was made by Prof. O of the physics department of the university who is taking care of it. There are noise from the new building being constructed by the science department right next to the seismograph. 

After inspecting the seismographs, I gave a talk on how to use seismic waves to understand the structure of the Earth's interior to a group of physics undergraduates and professors from the Faculty of Science. This seminar was very effective because I received a series of questions about very important basic concepts at a level that is not usually raised by high school students. I had thought that this was something I had already understood, and I had just let it go without explanation, but there were some very sharp questions about the handling of basic data. I was impressed by the high level of insight of the students and faculty members of the physics department. I think it is very important to have this kind of discussion from time to time. I would like to summarize this in some form someday.

The donated Horoman peridotite and Higashi-akashiyama eclogite were displayed on the glass shelves in the seminar room. I was impressed that they kept them well.

Since this was the first time of my trip this year that a fault experiment was conducted at this school, I started with the initial motion distribution of the Kobe earthquake and talked a little about the mechanism of earthquakes. I explained the relationship between earthquakes and faults, focusing on the four-quadrant distribution of initial motion.

So, we connected it to the fault experiment, and the students really enjoyed creating the fault. I forgot that I had donated 10 of these fault exsp. sets to this school. Slide cases are the original way to do fault experiments, but recently I have been using acrylic cases instead.

And finally, the fault was formed. ------. What's wrong? It doesn't work. Something is not shifting at all! To my dismay, the center of the video is moving out of alignment. This is an unexpected thing that happened.

As you can see, things are not going well at all this time. The students were also puzzled. Immediately, Dr. L, a chemistry assit. professor at the university, pointed out that there might be a problem with the cocoa we used. It was not pure cocoa, but a mixture of sugar and other ingredients. And, although I am usually stingy and drop the cocoa only along the wall, on this day I was generous and let them make the layer as it was, which was a bad idea. Another research theme was created. Naturally, I showed the students pictures of successful experiments and explained to them that there is much to be gained from such unsuccessful experiments.

It seems that this is the cause of the problem. I was driving from Nakhon Pathom University to Bangkok, and after I left, I remembered it, so I asked Dr. L to go back to the office to pick it up. This is the body of the cocoa? It was a little heavy, but I would like to bring it back home and find out what it is. I have one more research theme.

This is a lunch box I received on a day I had a class. It is from Japanese restaurant “Oishinei”. Thank you very much for always taking care of me.

Before going sightseeing, I visited the artificial pond on campus. This pond is inhabited by monitor lizards, which I once took a video of while they were slinking around the university campus.

I found an oval shape in the limestone, which is typical of fusulina, in the pondside rock. The situation and other information about the class are introduced on the FB site of SCiUS here.

https://www.facebook.com/share/p/18ZNtJya6M/

This is a large pagoda of the representative temple of Nakhon Pathom. It is actually overwhelmingly large. It is often introduced in tourist guides. The pagoda is located in the center of the city, and it is a holiday in Thailand on the occasion of the Buddha's anniversary called “Manbutsu Festival”. Many people go around the pagoda three times to pray. She asked me, “How about in Japan? I could only say that such a day is not so common in Japan.

This is the famous odd-headed serpent (called Naka) growing out of the Buddha image.

I was treated to lunch and dinner every day. For lunch that day, I had the tuna donburi at a Japanese restaurant. I was impressed by the taste as I had imagined. However, the wasabi was stronger than Japanese wasabi for some reason. I almost swallowed my nose many times. I wonder if the ingredients are different according to the spicy taste of Thailand. The taste is the same, though.

The scenery of the canal in downtown Bangkok on the way to the laundry after being taken by the university car to the hotel in downtown Bangkok. For some reason, it soothes my heart. It is similar to the canal scenery in Osaka, isn't it? Only the bougainvillea flowers are different.

Here is another laundromat 600 meters from my usual lodging, where 10 kg of laundry costs 30 baht and 14 kg of dryer costs 50 baht. When I am in Japan, I usually don't pay much attention to laundromats, but here I always check where they are located. As I write this, dawn is breaking in Manila.

Yesterday was the day of my flight back to Bangkok, and since my flight was late at night, I left my large luggage at the hotel and visited the National Science Museum in Pathumthani, a suburb of Bangkok, which I had wanted to visit once. However, this is a remote place with no public transportation, so I took the ARL, MRT, and BTS, Bangkok's three major elevated trains, to the edge of Don Mueang Airport, and then I asked a bike taxi driver how much it would cost, but he quoted me 400 THB,  which I refused, so naturally I took care of Grab, 200 THB. This multi-story building is the main science museum, and there are several other buildings scattered around the large site.

I didn't check the opening hours of the museum, and the museum closed at 3:00 p.m. on a weekday. I arrived at the museum around 2:00 p.m., so I had to rush through the museum. However, it is free for seniors, which is a good thing. To be honest, the exhibits in this science museum were quite common and not very fresh.

However, what interested me was the Technology Pavilion next to it (though you have to take a free streetcar to get there), which was quite impressive.

The history of computing is explained in considerable detail. This is the age of vacuum tubes.

The logic circuit exhibit was quite good. The explanation is very easy to understand. You can actually move the switches and see the changes in logic. This is a circuit called AND circuit, and it makes me nostalgic for the days when I studied it in “Tra-gi”（A Japanuse electronics journal) at the beginning of my digital career.

It gets quite complicated. I can't remember what it was. It was explained in Thai.

I had a Grab pick me up again and take me back to the BTS train station...I couldn't find a car with the cheapest price tag for the return trip, which was 28 km. It was a little bit expensive, 241 baht. Well, it was a good thing that the round trip was within 500 baht. I am glad I did not take a bike taxi. It takes a little experience.

Late in the afternoon, I visited JJ Mall, a shopping mall near the BTS MRT transfer station, to have a meal. It was introduced on the Internet as a mall with many small stores, and it seems to be an antique store. If you are looking for something interesting, I think this mall is better than the famous MBK.

Now, we had dinner at a rustic food court. Usually, you have to buy a card to enter a food court, but I couldn't find a card counter anywhere in this place. The Internet said that there was a card counter, but I couldn't find it anywhere. I had no choice but to ask the staff at the restaurant, and they told me I could use cash, so I ended up with the omelette and curry rice you see here. I added my own vegetable toppings. The fact that they had "fukujinzuke" pickles was a high point! However, I wish they had Japanese sauce. 99 baht for this is still cheap. For some reason, there seemed to be many Westerners in this food court.

So, I will say goodbye to this visit to Thailand with the dragon statue at Suvarnabhumi Airport. There are still many experiences that I have not fully digested, and I will need to ruminate on them after I return home. So, this is the end of my Thailand Diary. I may add some more after this until I return home from Manila. Thank you very much for reading this diary for a long time. I would also like to express my gratitude to the people of Thailand who have been so kind to me.

I flew Philippine Airlines for the first time on my return flight this trip. It is a flagship airline with good service and low fares. I managed to stay in the restricted area of Aquino International Airport for 10 hours by visiting 3 lounges. However, 10 hours is still a long time.