“What's wrong with the computer - it has an nvme drive installed, but opening the explorer, if you haven't done it for a long time, takes about 10 seconds, opening the .zip file on the desktop takes about a minute, and when you press the“ Start ”key, you need to wait about 20 seconds? "
Around the end of January, I was shown a Twitter post in which a Windows user with a powerful machine talks about random freezes in Explorer. Many unscientific theories have been proposed. I don’t usually do the analysis of performance problems with strangers, but this case seemed interesting, so I decided to study it.
In numerous popular videos and texts explaining how cryptocurrencies work, this explanation is usually given using the example of Bitcoin, the first of the cryptocurrencies. Bitcoin is actually a clean and understandable implementation of the principles necessary for a cryptocurrency: open history of transactions, the ability to check the source of money along the chain, clear rules for the appearance of money, clear rules for creating new transactions. New coins appear only as a result of mining new blocks, and the mining reward gradually decreases according to the logarithmic law, as a result of which the total amount of issued bitcoins will never exceed the limit (21 million). Any waste of money (transaction input) must match the output of another transaction, money cannot come from anywhere. To spend, you need to sign the transaction with a private key. A simple scripting language allows you to do multisig and all sorts of other useful things, including creating new currencies (tokens) based on the bitcoin blockchain (omni layer, that's how USDT lives). There is no central node, the new block is determined by the consensus of all nodes - if there are several options, they accept the branch in which the maximum number of calculations was done, this is a formal criterion that does not allow for discrepancies. Any user can run its own node, the source code is open.
About ten days ago, when I started updating apps in the App Store on my Mac, I ran into a curious error.
The internet is filled with stories of people whose Google accounts were blocked for unexplained reasons, which caused them to lose all their data, including years of e-mails, so I was quite worried. But I had never heard of such cases with Apple services and would not have expected such behavior from a company as loyal to consumers as Apple, so I decided it was a glitch and decided to try it later.
Today, when astronomy has returned to the school curriculum, any high school student (well, in theory, anyone) should know: the distance from our planet to the Sun is approximately 149.5 million kilometers. This distance is also called an astronomical unit.
But, it is clear that this answer somehow had to be obtained and astronomers took several steps to do this, stretching out for more than one millennium. Below - more about each step.
I have been living in Germany since 2014.
Some aspects of the country are still in awe. Others want to climb on the wall and howl "why so?" I will try to reveal both those and others - and to reveal why I will stay here, most likely, until the end of my life.
Heidelberg - medieval Germany remained here in its original form
Programmer salariesWell, how can you do without it? I decided to take the issue of payment to the very beginning, because if it disappoints you, then your interest in the country may immediately fade away.
Guys. Stop looking at average salaries on Glassdoor. They are always and everywhere underestimated by 20-30 percent. I know the market realities and I will name the numbers that should be guided by in 2020.
Not so long ago, my baby son asked me - what experiment do I consider the most important one conducted in the 20th century? He needed it for a school essay.
This simple question put me into a stupor for several hours. Because the choice was really difficult. With the nineteenth century it is easier - there it is immediately clear that the double-slit experiment *.
And with the twentieth?
Of course, if you choose by significance, then everything is simple. This "Trinity" - the world's first nuclear weapons test, which took place on July 16, 1945. Without exaggerating at all, we can say that after this test the world woke up different.
But, for all the significance of this experiment, it did not bring new knowledge. Before that, everyone knew that the bomb would explode. The experiment did not add any new knowledge.
On reflection, I decided that I should choose one of the social experiments - in the twentieth century, scientists first turned their attention to themselves - starting to study human behavior. For a person, understanding his nature is much more significant than understanding the structure of the atom.
Having considered the Stanford Prison Experiment, Milgram's experiment and Universe-25, aka Rat Paradise, I chose an experiment to breed the friendly fox of the Soviet scientist, Academician Dmitry Belyaev.
Puzzle loverGerald Selby has always loved riddles: where others saw only noise, he strove to find order and harmony. While working at Kellogg's Oatmeal Factory, he analyzed materials to increase shelf life. One day, while studying cereal from other companies, Jerry came across a strange sequence of characters on the back of a General Mills box. Instead of a date and a manufacturing factory, a mysterious code was printed there. Jerry decided to decipher it: taking several boxes of Kellogg's and General Mills breakfasts, he began to compare their moisture content, realizing that cereals with approximately the same moisture content should have close production dates. By making notes on paper, he identified some patterns. Soon he was able to decipher everything that made it possible to determine the place, date and time of manufacture. In a more aggressive line of business, “hacking” competitors' secrets could have been a huge benefit, but not in the production of oatmeal, so management was not enthusiastic about its discovery.
To increase the attractiveness of smartphones, manufacturers put as many different programs on them as possible. This is clear. Just take and delete the unnecessary ... Stop.
It turns out that some programs cannot be removed. For example, on selected Samsung models unable to delete Facebook (there is only the 'disable' option). They say that the Samsung S9 also comes with Microsoft's "non-removable" apps preinstalled.
These smartphones are for example. The same problem with other models. Many have non-removable programs from the manufacturer itself.
Since the early wars between Netscape and IE, functionality has become the main tool in browser competition. But the strategy of unlimited growth and expansion is completely insane. For too long we have let it go on.
Using wget I downloaded all 1217 of the W3C specifications published to date1. A significant portion of these must be implemented in the browser for the modern web to work. I have calculated the scope of these specifications. How complex do you think the modern web is?
Estimates have completely broken away from fundamental analysis, multiples are at historic highs, the rate of issue of securities is off the charts - and all this is accompanied by insanely speculative behavior of investors. A big crisis is inevitable. I want to start my story with the seemingly obvious, but today not everyone understands why the actions appeared. So, a share is a share in a company. Why do you need a share in a company? In order to have some of her profits. That is why the real value of a share is determined by the current and future profit of the issuing company, which is transferred to the shareholder in the form of dividends. Some companies pay dividends on a quarterly basis, others annually, and there are those that have not shared their net profit with their shareholders for more than a decade. At the end of the last century, this was a rarity, but with the advent of the Internet, the speed of business scaling increased by an order of magnitude, and technology companies made it a rule to reinvest all net profit in development so that in the future dividends would be even greater. Again, the value of any stock is provided only by its real or potential dividend yield. However, the value is not equal to the value and the actual price of a share is always speculative.