Edward Library

 1. The world is currently the safest. People think that the current world is particularly dangerous. Every day, the news reports that terrorism, clashes of civilizations, and weapons of mass destruction are increasing in danger. However, we easily forget the dangers that were abundant in the news just a few decades ago. mobile e-book: 127p I think that after broadcasting some special incidents on the news, people often generalize that they think that now is the most dangerous time. However, the crime rate in Korea is decreasing day by day, and it is rare to find a country this safe. However, the problem is that the suicide rate in Korea is too high. There may be many reasons, but I hope you realize how safe and economically good Korea is compared to other countries. Of course, the crime rate is decreasing worldwide, and human life is becoming safer. Many problems, such as the crime rate and fetal mortality rate, are all decreasing. I hope that there is no error in generalizing by ...

 Unlike general PCs, servers and storage use a technology called RAID (Redundant Array of Independent Disks) to ensure disk stability, consistency, and data preservation. The speed and stability vary depending on the configuration of RAID0, 1, 2, 3, 4, 5, 10, etc. by combining multiple disks. To configure RAID on a server, you need a RAID Controller device, and the more expensive the product, the more RAID configurations you can have. I would like to explain the most commonly used combinations, RAID 0, 1, 5, and 6. RAID0 - The fastest but least stable method. As shown in the figure, assuming that 1,2,3,4 are one data, the data is arranged in a stripe shape on two disks, so it is fast to read or write data, but if one disk fails, the data will be broken. In other words, it can be said that there is no stability at all. Availability: 500GB * 2ea = 1TB RAID1 - The speed is the same as a general single disk, but since the same data is stored on two disks, the data is still alive even i...

 For those who find it difficult to understand how blood types are selected and formed, I will briefly explain. There are four main blood types: A, B, O, and AB. In more detail, they are AO, AA, BO, BB, OO, and AB. AO and AA are called type A, and BO and BB are called type B. For example, when a child is type AB, the blood type is formed by receiving one A gene and one B gene from each parent. Therefore, a couple with type O can only have an O child, and AO-BO parents can have children with all blood types. This can be explained with the image below. Type A - B couple The picture above is based on the blood type with the most possible variations. You can compare your blood type with your wife/husband's blood type.  ◎Type A couple AO - AO : A, O AO - AA : A AA - AA : A ◎Type B couple BO - BO : B, O BO - BB : B BB - BB : B ◎Type O couple OO - OO : O ◎Type AB couple AB - AB : A, B, AB ◎Type A-B couple A, B, O, AB (refer to the picture above) ◎Type A-AB couple AO - AB : A, B, AB A...

 1. The current war is not a physical war, but a data (information) war. You cannot conquer knowledge through war. mobile e-book: 430p Now, you cannot gain much money by physically suppressing any country. What makes money now is data, design, function, and the image of the company. Would it be possible to maintain or create companies like LG or Samsung by occupying Korea by force? What makes money is people's thoughts and knowledge. Knowledge cannot be forced out, and it is more economically beneficial to bring in one person who can design semiconductors than to make missiles and attack other countries. Nowadays, knowledge is much more valuable than swords and guns, and a country that has a lot of information and knowledge and uses it well becomes stronger and wealthier. That is why we should study harder and accumulate and use knowledge well for the prosperity of our country. 2. Let's constantly study and reflect deeply to get to know ourselves. In order to live in the future...

 1. Human adaptability and expandability Before writing was invented, stories depended on the limited capacity of the human brain. Therefore, stories that were too complex for the human mind to remember could not be created. mobile e-book: 399p I personally think that writing is the greatest invention of mankind. If there were no writing, most of society, including history, culture, architecture, and science, would not exist, and we would have been wild animals just living day by day. We have grown at an incredible rate by communicating, cooperating, and recording. Looking at the above quote, in the past when there were no cell phones, everyone memorized their home phone numbers, pager numbers, etc. Now, smartphones store a huge amount of information. My personal opinion is that we should not enjoy these convenient devices, but rather leave our limited personal limitations to the devices and create and make new things. That is why humans should study more, develop, and continue to ...

 1. Causes of the Declining Birth Rate The cost that parents have to give up to raise children instead of working has increased. -110p It shows that the birth rate has also decreased as women's labor opportunities have increased and the gender wage gap has narrowed. -116p I think that as mankind has moved away from the agricultural era and become economically wealthy, and as medical advancements have clearly reduced life expectancy and infant mortality rates, it has reached a level where it is no longer necessary to have many children. Looking at the cases of many advanced countries and our country, there are many people who want to have one child and raise them under good conditions, and many who do not have children and live while enjoying economic benefits, so it seems like a natural progression. However, in my opinion, the better the environment and opportunities, the more children we wish to have. In the past, it was unthinkable for a child to grow up in a poor and impoverishe...

 1. Thinking about myself, what should I do? We think we live our whole lives according to our own thoughts, but in fact, we may not realize at all that we have mostly been playing the role of a supporting actor without any lines on the stage of the theater called the world. mobile e-book: 272p There are 7 billion people in the world, and we do not know how that many people live. Even though SNS is developed, it is impossible to see their real lives. This is because people are conscious of others, so they always show off their good looks and boast, and there is a high probability that it is fiction. In order to break the part where we become supporting actors on the stage called the world, we must leave our names. It is rare to find someone who does not know Steve Jobs, and Einstein, Newton, Socrates, etc. are people who play leading roles on the world stage and continue to be talked about. In other words, if you want to become a leading actor, you must make your name known to peop...

 1. Information that you haven't found yourself is useless. To survive in the world of stocks, you have to trust yourself and your own judgment. That's why I didn't trust confidential information. If you bought stocks based on information from a person called Smith, you should listen to his information and decide when to sell. mobile e-book: 79p News, experts, insiders, and high-level confidential information are all just information, and there are many parts that are not reliable. I think that in the beginning of investing in stocks, you may have had the experience of being a speculator who just followed others. Of course, I have gone through that experience and am now creating my own path. I think that the period of speculator wandering in the beginning should be short. I also think that you should never make a big investment during that period. The world of stocks is cold, and it's no use regretting investing after trusting other people's information. No matter h...

 1. The human brain is amazing the more you learn about it. Including your brain, which supervises the movements of over 600 muscles, balances various hormones, pumps 2,000 gallons of blood a day, regulates the energy of billions of brain cells, digests food, excretes waste, and fights disease, all without resting for about 72 years. mobile e-book : 41p As the quote says, not only humans but also animals perform these functions, but humans additionally have many thoughts and actions, and their own rules and systems in various aspects such as creative, social, political, and scientific. In this way, it is very different from simple creatures, and I was able to learn more about how much the human brain does. With so much to do, it seems natural that we sleep. However, it is said that the brain does not rest even when we sleep. It continuously performs various tasks such as organizing memories from when you were awake, maintaining homeostasis of the body, and increasing immunity. Much...

 1. If you can, do it. When we say to ourselves, "I can do it, I just don't want to.", this may be a different way of saying that I can't actually do it. mobile e-book: 186p I think that the phrase "I can, but I don't want to." is a defense mechanism used by people who don't know themselves well or who overestimate their abilities. As the saying goes, "Empty carts make the most noise," there are people who talk a lot and make excuses but don't actually get results. I hope that my children, including myself, will become people who show by action if they can do something, rather than people like this. Feynman, who appears in the book, always showed everything through action. Of course, many geniuses, CEOs, and all outstanding people have shown the public something through action. Some people criticize Elon Musk, but he is not just a person who talks, as he has created almost perfect autonomous driving, built robots, and even returned a sp...

 1. Let's look at life from afar The scenes of our lives are like rough mosaics that make no impression when seen up close. You have to look at them from afar to realize that they are beautiful. In the same way, as soon as we get what we desire, we realize that it is empty and worthless. Schopenhauer's Theory of Life - p. 81 If we think about life hastily and become rich right away, we will quickly become beggars because we have never become rich through our own efforts. In the end, if I don't achieve it, it is not mine, and even if I get something I can't handle, I will soon return to my original state. I think we need to examine our own vessel well and know how much we can handle and how to make our vessel bigger. One right action may seem small right now. But I think that if it accumulates and the right habits and thoughts accumulate, it will eventually go in a good direction. If you split up your time right now and create something, it will eventually become somethi...

 1. Let's consider the relationship of interest. Since geniuses have superior cognitive abilities, they spend time contemplating life itself, not serving their will, and try to consider the ideology of all things without considering the relationship of things to other things. mobile e-book: 643p Even if not everyone is a genius, I think it is valuable to consider the ideology of all things. For example, I think that understanding a formula and simply memorizing it are different. Memorizing a formula and simply substituting values ​​is what we commonly call spoon-fed education, and I think that if you understand the formula, you will automatically know the value without having to substitut e the formula. That's why I think the aspect of understanding is very important. The geniuses who created the formula are the ones who created the formula for the result, and they were able to do it because they understood the formula. I think they must have made countless trials and errors, m...

 1. Trust is important. A wise ruler must completely trust the general's sense of reality, and must show this trust as a guarantee of the position, empowering the general. mobile e-book: 171p When requesting something, there are people who do not trust that person or who must see it in person. However, if you control several things by yourself, there are bound to be limitations. For example, when running a company, there are various departments such as finance, sales, marketing, technology, and human resources, so when the company is small, the CEO must make all the choices for the department, but as the company grows, it becomes impossible to look after all of them. That is why I think each department should demonstrate its own abilities and trust and operate the person in charge of that department. In the end, when the scale of decisions regarding the operation of the company grows, it cannot be done alone. People should come together to think about and discuss various issues, an...

 1. Blaming others is always the problem. When a war is lost, people try to find the person who is 'responsible' for the war. When a war is won, people praise the person who started the war. Wherever there is failure, responsibility is pursued. mobile e-book: 245p Not only in war, but whenever a big incident occurs, if something goes wrong, they find the person responsible and do a witch hunt, and if something goes well, they praise him. It seems that the nature of the human race itself is like that. Even now, many problems and good things happen not only in our country but also all over the world. Due to the development of SNS, many things that happen are quickly shared and talked about. However, I think that we need to take a step back and look at things, whether they are good or problematic, at least once. If you don't empathize too much and think rationally, you may find the answer. I hope that we don't become a crowd that engages in witch hunts, and that we become ...

 1. Let's realize the goal of personal ideals. I teach you the Übermensch. Man is something that must be overcome. What have you done to overcome man? mobile e-book: 21p The word Übermensch appeared first, and as explained below, it is a personal ideal goal that must be achieved by one's own efforts, not by a specific person. The Übermensch does not refer to a specific person. It is a personal ideal goal that all of us must achieve on this earth, and by our own efforts. Nietzsche said that the Übermensch has never existed until now. He expressed his hope that countless more will appear in the future. It is desirable for all people to become Übermensch. mobile e-book: 23p I think it is important to follow one's own ideal for oneself. As Socrates said, 'Know thyself', philosophy can be thought of as mostly knowing oneself. It is difficult to know oneself, and once you know yourself, you can set a goal for what to do. In order to know what is right and wrong, what your...

 1. All humans are outstanding in some way. "Why are you so hard! - Charcoal once said to Diamond: Aren't we close relatives?" Why are you so soft? Oh, my brothers, this is how I ask you: Are you not my brothers? The Twilight of Idols mobile e-book: 354p Charcoal and diamond are the same set of carbon (C). However, their uses are very different. Diamonds are the hardest and are used in crafts, special products (superconductors, semiconductors, etc.). Charcoal is used in many ways, such as fuel, deodorization, dehumidification, humidification, water purification, and art tools. I think this is the difference between people. We are all the same human beings, but each of us has different abilities to use, so each of us is outstanding in different areas. I think that everyone has an area that they have experienced or are better at. That is why I think you should not belittle yourself and think that you can't do anything. I think it is because you haven't found what yo...

 1. Beware of the disadvantages of groups. Madness is rare in individuals. - But it is common in groups, parties, nations, and eras. Beyond Good and Evil mobile e-book: 206p No matter how smart and wise a person is, if he or she belongs to a group, his or her claims and essence can be distorted. This is because people are social animals, and if most people raise their voices for a certain claim, the people in that group will try to say the same thing. As scientific evidence for this, there is Asch's Consensus Experiment. People agree with each other and are greatly influenced by their surroundings. When everyone in a group speaks with the same argument, I think there will be few people who can stand apart and make different arguments. Therefore, even if something is wrong, people agree and say it is the right answer, and even if something is wrong, because many people did it, responsibility is shifted or distributed, and while they are in a state of madness, they will not come to t...

 In order to support one lie, you have to come up with twenty more lies. Lies are really like that. Since one lie must give birth to another lie like a cancer cell to establish the lie, you have to keep lying to maintain the lie. For example, when you overslept and were late, instead of simply saying sorry for overslept, you ended up lying about being sick or having a traffic jam. Then, when asked where and how you were sick, you have to lie about the part that hurt, and when asked where you were blocked, you have to lie about the part that was blocked. That is why I think that not lying is the best way. Misconceptions of victims and perpetrators - When a rich person takes something from a poor person, the poor person is mistaken. He thinks that the person must be really evil to take away the little he owns. However, the rich do not feel the value of individual possessions that seriously. Strangely enough, most rich people are known as bad people these days. I think it's because th...

 If you have accumulated cash assets, I would like to explain what to do next. For example, let's say you have accumulated tens of millions of won in cash to make your own money bowl like the article above. Now, you will be wondering what to do with this money. Some people will increase their assets with deposits, or there are countless ways to increase assets with stocks, real estate, and businesses. Among them, I would like to talk about stocks. It was the same during the Corona season and it is the same now, people start to gather one by one after hearing rumors that a certain stock/coin is going up (or someone got rich). Of course, I also started participating in stocks during the Corona season. And I always asked friends around me who seemed to know a little about stocks, just like beginners. What should I buy? Should I buy? How much should I buy? When should I sell? Thinking about it now, I feel ashamed of how stupid it was. Investing your hard-earned money just by listening ...

 Each person has a different size of money bowl. Some people have a large amount of money that they can manage, and they can live without any problems, and it can even be an opportunity for further development. Some people have a small amount of money, and even when they have a chance to make a lot of money, they don't take advantage of it and just spend it all and end up wasting it all. The money bowl I'm talking about is the amount of money that they can control. For example, let's say A and B live on a monthly salary of 3 million won. A has no assets, and spends most of his income on rent, living expenses, luxury goods, and car maintenance, and uses his credit card to pay for all the expenses that he needs to pay next month, so he has no cash, no savings, and no memory of saving a lot of money. B has several assets (houses or stocks), saves a certain amount of money every month according to his consumption, and has tens of millions of won in savings. Let's say that 1...