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Pulse Plasma Rocket, one of concept as if it is science fiction, is under development in Innovative Advanced Concepts[NIAC]. It is being launched by NASA. The rocket generates driving force by intense plasma burst created for a quick second and it can enhance more efficiency and specific impulse than conventional chemical rockets. If this technology comes true, the driving force will be maximum of 100,000 newtons and the specific impulse will be 5000 seconds. Honestly, I have no idea what they mean. However, I hear we will be able to reach mars only in two month when we take the rocket. Current rockets take nine months to get to mars. Hence, it can reduce times to reach mars drastically. The rocket has some benefits for us. If we go on a space trip in the future, we can face various problems such as stress due to limited space like space ship and necessary foods while moving. Many people want to spend as much time as possible doing something in mars and moon. Therefore, the shorter the better. Taking plenty of times to traveling might be a waste of time. I'm not sure if I still live when the rocket works properly, but if I live and have money to spare, I want to take the rocket at least once in my lifetime.
20 de julio de 2024
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The line graph compares seven countries in terms of nominal GDP per capita over the years of 1990 to 2023, measured in US dollars. Overall, the United States saw a strong upward trend throughout the period, whereas the figures of the others fluctuated on a moderate upward trend. Focusing on the figures in 2023 first, the US saw the highest nominal GDP per capita, in about US$82,000, which was over 50% higher than that of Canada. The second highest figure was seen in Canada, about US$54,000, closely followed by Germany with US$53,000. The UK, France, Italy and Japan came in third, fourth, fifth and last in the order, with the GDP per capita ranging from nearly US$50,000 to below US$35,000. Moving on to the changes during the decades next, the nominal GDP per capita of the US more than tripled from 1990 to 2022, starting from about US$24,000 to reaching US$82,000. This massive increase made a stark contrast to Japan's performance, which was the highest in 1990 at above US$25,000, ending up in the last with about US$34,000. Aside from the US, each country experienced fluctuation, typically showing a strong rise during 2001 to 2007 and a sudden fall in 2014.
19 de julio de 2024
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The crowded library Libraries in China divides to the public and the campus' . Finding a seat in library could be very challenging. I have graduated from college for years, but going to libraries have always been common to me. It's easy to find a public library in a city. Libraries always look grand and beautiful. They are not only public infrastructures but also served as landmarks in their areas. From what I have visited, the public libraries in metropolis are always extraordinarily spacious and clean. They are closed to subway stations and malls. You literally can live in a public library if are allowed. Some of the libraries even provide oven for readers who would like to eat there. There are dining area provided. The collection of books is abundant, however, this is not the main factor why library is getting super popular. In my opinion, the readers in public libraries could be divided into three groups. The first is people who are looking for a nicer place for their study or work. Library creates a good atmosphere help people concentrate on things easily. The second is people who are looking for a nicer indoors occasion. Some people dislike being at home, or they aren't satisfied with their own home's infrastructures, so they come to libraries to kill time. In this group, some of them just sit on there and start playing phone games, or watching videos, some even sleep there. Library provides fast WiFi, water, fresh air, charging sockets, lamps, air conditioning, and comfortable seats. One can even save up for utility bills by just staying the whole day in a library. The third group is those real readers. However, they aren't commonly seen. Electronic reading is very popular and convenient. If people have a target book to read, they may read directly on their phone. Or, they may come to library borrow the book, it's unnecessary for them to find a seat. There are people prefer random reading or exploring books as well. +
19 de julio de 2024
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