Free single chapter, content description, popular science, etc. (1)

   Before we start, let me introduce the news from the first two days: a certain type of leukemia has been conquered by a pharmaceutical company in Switzerland.

  The cure rate is 80%. The new medicine needs to transport the body tissue to the United States for synthesis, and the single cost is about 2 million yuan. For the specific situation, book lovers can check the news, and then ask Ling Ran, the handsome doctor next door, to ask for popular science.

  Keywords: Japan, medical insurance, leukemia.

   That's right, this thing was included in Japan's medical insurance, and the keyboard warriors were dispatched.

   In mentioning this news, in fact, I want to talk about a concept, a relatively narrow concept in this single chapter, that is what Xian Yang Qing said: Technology has no borders.

   There is nothing wrong with this sentence. The Swiss company conquered leukemia and made profits all over the world.

   But he missed a word: Patents have national boundaries!

   That medicine is really expensive!

  …………

   The reason why we say that technology has no borders is for the next popular science theme: 5G!

  In 5G, the technology promoted by domestic manufacturers such as Huawei is not domestically produced, but the countless patents generated by researching this technology belong exclusively to these companies.

   First of all, let me state one thing: what to say about 5G, who to say, and who to tell, is a troublesome matter.

   In this single chapter, all the statements are very one-sided and partial, and can be discussed, but there is no need to argue, just let some book friends with vague concepts understand some meanings, and then the goal is achieved.

  5G is a communication standard(?).

   When it comes to communication, let’s start our popular science today.

   First, let's start with the crooked theme of this book: human athletics.

  This sport has many predecessors, who have made outstanding contributions to the current scene of competitive sports.

   However, there is such a person, such a woman, that is worthy of the hearts of all otakus who love this sport!

   She is a super beauty, Heidi Rama.

  Hollywood super beauties!

  As a woman born more than 100 years ago, looking at her photos, I even think she is more beautiful than Marilyn Monroe!

  Hedy Lamarr, born in 1914, died in early 2000.

   Zhang Ailing said that women should become famous as soon as possible! On the other side of the world, her contemporary Heidi Rama interprets this sentence herself.

In 1932, when Heidi Rama was 18 years old, a Czechoslovak film company invited Heidi Rama to play the leading role in "Crazy Headed" and promised to bring the film to the international market, but there was a special conditions of! As a result, Heidi Lamar agreed, and she became famous all over the world and left an important mark in the history of human cinema.

   At present, no film and television materials for "Fuck You" have been found, but the existing relevant documents show that the condition put forward by the film company at that time was to require Heidi Rama to leave the country naked!

  Imagine that in the 1930s, the flower growers were in the middle period of the Republic of China, and their thinking was still far from being fully enlightened. Czechoslovakia was also in the recovery period after the First World War, and the whole global environment was not as open as it is now.

   In 1933, "Crazy Headed" premiered in Czechoslovakia, and Heidi Rama became the first star in the world to appear naked and was dumped by men all over the world.

   From now on, a brand new era has come!

  I didn't find the video of the movie "Fascinated", which is a very regrettable thing for me, an otaku who loves sports!

   Thus, Heidi Rama began her legendary life.

About Heidi Lamar's life, someone summed up: "Can write poetry, dance ballet; can go to the big screen at the age of 16; can also star in the first full-nude play in human history at the age of 18. Can pursue her The man who failed commits suicide; makes her six husbands feel ashamed in front of her and wants to commit suicide; and sells 680 kisses for more than 17 million US dollars to resist **. Can turn people upside down in Hollywood with bad acting skills Yu is engaged in scientific research in the field of communication!"

   Yes, this glamorous Hollywood superstar, in addition to being a patriot, she is also a scientific genius!

  The time goes back to 1940 during World War II, when Heidi Rama and Ansel jointly invented a military communication system that can withstand radio interference, that is, "spread spectrum communication technology". Its original intention was to fight against Germany.

  In 1941, Heidi Lamarr and composer George Antheil, inspired by the way the notes were organized, speculated that a single radio transmission could be sent on multiple frequencies to block interference. This method, called "frequency hopping," avoids blocking radio messages.

  In 1942, Heidi Lamarr and George Antel obtained the patent of "frequency hopping technology" issued by the United States. They donated it to the U.S. government as military technology, hoping to help in World War II. But it did not attract the attention of the US government, and eventually the patent expired.

  In the patent description, a communication method for guiding torpedoes is described, that is, a synchronous communication method is used between the transmitter and the receiver between the carrier frequencies for a fixed period of time. The synchronized numbering of the carrier frequencies used by the transmitter (a high-altitude aircraft) and the receiver (an operational torpedo) is controlled by a player piano-like device with a unique A sequence of 88 possible ladders. This means that the torpedo can be manipulated by sending only a fraction of the entire message on each frequency. Attempts to jam communications usually result in the failure of one channel at a time, while the information on the other channels is sufficient to ensure that the torpedo makes the necessary directional corrections to hit the target.

   However, due to the limitations of the technology at the time, this patent was not made in kind, but was sealed by the US military.

I basically don’t understand the above professional terms. I believe that many book friends are just like me. .

Back to the topic:

   Now there is someone on Heidi. Rama has a comment: "As long as you have used a mobile phone, you need to know and thank her. You must know that this **** female star has contributed to the global wireless communication technology unparalleled."

Why do you say that?

  Because decades ago, due to the limitations of the technology at the time, Heidi's patent was not made in kind, but was sealed by the US military. It was not until the 1950s that a private company independently developed the relevant technology (please note that it was independently developed), and then looked through the patent library and found this long-standing patent.

   Then, in 1988, this technology was developed by Qualcomm, resulting in the most rogue, shameless, and most deranged enterprise that played with the patent stick in human history - Qualcomm!

   And that technology is called "Code Division Multiple Access"!

  If you are confused about its name, then it has another name:

  CDMA!

   "To be continued"

  ps: There are two follow-up (2), one is paid and cannot be changed, please click on the back for free, I am very sorry for the trouble! There will be free text compensation!

   I actually wrote a chapter in the morning, and then I continued.

  

  

   (end of this chapter)