Chapter 81

Academician Ding continued: "there is no 'hardship' and 'discipline' in my dictionary, only 'interest' and 'sense of achievement'. Therefore, I don't limit your working hours every day and working days every week. The pressure and motivation for learning come from your own inner driving force... You can ask me directly or your senior brother if you have any questions. "

After a pause, he asked again, "by the way, what kind of research do you want to engage in? The space industry is just a major, and there are many subdivisions in it. You can't learn everything you want to learn. "

Zhang Yuan thought seriously for a period of time. He would be a little confused for a moment and a half. He was very interested in every direction.

While he was thinking, elder martial brother Zhao suddenly said, "if you don't have a particularly complete understanding of the whole space industry, you can see it on the spacecraft first, and then consider the direction. It's always right to lay a good foundation. "

"Moreover, the current laboratory conditions are too poor and there are few resources. Any experiment requires a queue. I still recommend learning more basic knowledge. Unless you have a particularly good idea, you can do the project again, or you can do some simulation experiments on the computer. I can help you with this... "

Now gravity is simulated by centrifugal force. For some delicate experiments, any Coriolis force is a nightmare.

Academician Ding nodded, "that's right. Zhao Qingfeng, when you are free, take him to the weightless area outside. Well... Why don't you just practice in the nuclear fusion engine room for a while. "

"The nuclear fusion engine is by far the most complex project. If you figure out the whole workflow, you can basically graduate. "

Zhang Yuan's heart moved and ran to the weightless area outside to practice. He must be willing.

The fusion engine of the earth times is the most cutting-edge thing.

"That's right." Academician Ding added: "if you want to graduate formally, you should at least publish an article in a journal in the first region of the earth. The current paper evaluation system of our new civilization has not been established, so it can only be calculated according to the world, or generally recognized by experts in the industry. "

Just a paper

It seems to see Zhang Yuan's question. Academician Ding smiled and said, "don't think it's very simple. If it weren't for the poor laboratory conditions here, my requirements would be higher."

Zhang Yuan had a whim and suddenly had a question: "what if I can't send out my paper all the time?"

Academician Ding laughed: "either apply to drop out or postpone graduation all the time. Be the first batch of people who die in the stars!"

……

Academician Ding is actually very busy.

Although the earth times has been tested for a long time, there are still many small problems exposed during the whole voyage, and some things need to be adjusted temporarily, so these bosses can't see a person all day.

In the following time, Zhang Yuan and his senior brother Zhao Qingfeng contacted more.

Zhao Qingfeng is a post at level 18. He is responsible for the maintenance of the material circulation system. In fact, he is also very busy. However, the busy level must be lower than academician Ding. He can see it at least every day.

"I see. The level of work is directly proportional to the degree of busyness. My original secondary post was a floor sweeper. You can be absent from work at will, but you can't. "

Zhao Qingfeng smiled and said, "no, I don't need to manage here all day. It's just that at the beginning of the voyage, there are a little more items to be adjusted temporarily. "

"Go, I'll show you out!"

If a person with a work level lower than level 10 wants to leave the living area, he must report to his superior and be accompanied by others.

"Verification passed, please pay attention to safety!"

One of the nurses suddenly smiled and said, "Mr. Zhang Yuan, please don't go out for more than 10 hours each time. Otherwise, excessive calcium loss will lead to osteoporosis. You can go to the hospital and buy some calcium tablets. "

"OK, thank you for your reminder."

Another nurse laughed and said, "Wang Shuo, why are you so good today? Do you like him very much? "

"Where? I was fine... "

Zhang Yuan's scalp is numb and runs away quickly.

They put on their spacesuits and went to the elevator.

The elevator rises slowly. With the decrease of linear speed, Zhang Yuan feels less and less "gravity". At the same time, it produces a dizzy feeling standing in the "drum" of the washing machine.

Finally, when the elevator reached the central axis of the spacecraft, all the dizziness disappeared and the two were completely weightless.

The two "swim" into a rail car through their hands and go to the air pressure door.

Several soldiers guarded these air pressure doors. When they saw Zhang Yuan and their identities, they saluted.

"Di ~ please pay attention to safety!"

Further outside is the vacuum area.

The rail car starts slowly along the central axis to the first pressure valve.

Wheeze! A pumping sound.

After the air in this small room is removed, go to the second air pressure door.

The whole pumping process was carried out three times before the car successfully reached the outer vacuum zone.

The most precious thing in the universe is matter. Human beings have no ability to create a complete vacuum, so it is inevitable to lose a small amount of material every time they go in and out.

However, as long as the lost material is within the acceptable range.

Along the way, Zhao Qingfeng kept introducing various facilities and equipment in weightless areas.

"Do you know why there is no air in the weightless zone?"

Zhang Yuan thought: "mainly to reduce the mass of the spacecraft."

Elder martial brother Zhao nodded: "yes, although the air density is low, the overall sum is a wonderful number... If the mass of the spacecraft is as high as several billion tons, it is impossible to accelerate to seven thousandths of the speed of light. If you think about it, the total mass of our 500000 people is only 30000 tons, which is many orders of magnitude different. "

The interior of the cabin was very empty, emitting dim lights. Elder martial brother Zhao pointed his finger out of the window, "as for those complex pipes, they are actually the heat dissipation devices of the spacecraft. The heat generated in the living area is brought outside through these condensing devices, and then circulated through the radiation sail on the surface of the spacecraft."

Although the average temperature in space is more than 200 degrees below zero, there is no material exchange and the heat dissipation is ridiculously slow. It can only be dissipated by radiation.

As an important part of the ecosystem, heat dissipation is the top priority of spacecraft.

Elder martial brother Zhao said slowly, "in fact, the current carrying capacity of our spacecraft is not enough to carry 500000 people."

Zhang Yuan was stunned. They are 500000 people. Don't they live well?