This is where our hero is at the moment.
Representatives of NASA and JPL immediately after the successful arrival of the rover to Mars gave a press conference, and then shared additional information - about the future fate of the rover. "Seven minutes of horror" did not frighten anyone (although it made them worry), but now the most interesting part begins - the exploration of the Red Planet.
We know where the rover is, but we want to see what surrounds it with our own eyes. And soon such an opportunity will present itself. Plus a lot more interesting things.
An attempt by the ILV to "slow down" communication with Twitter resulted in local "Internet cataclysms"Unfortunately, any useful technical information on how exactly ILV decided to implement the what publicly stated, not so much. You can even say that it practically does not exist. So it remains only to speculate on the observations and available data.
From the observations at the moment, we have: scattered "local" messages that twitter really slowly opens (or does not open at all). Moreover, it seems that most of them concern a mobile application.
At the same time, at the same time, even through Rostelecom (by wire), Twitter itself opens quickly, and so does the video from its CDN.
When humans settled in Central America (about 15,000 years ago), they didn't have to domesticate the avocado. Pick these wonderful fruits from the tree and eat. Save the bones and plant wherever you want. No fiddling around raising fruitful varieties from wild ancestors. These are not millennia-long attempts to domesticate corn.
But how did it turn out so well? The fact is that all the breeding work, even before people, was done by someone else, simple, but big. And people came to everything ready.
To understand how this happened, let's observe how natural selection works in plants. To win the competition, they have to come up with clever breeding methods. The task is to spread the seeds over a large area.
If your seeds just fell and rotted under the tree, there is little use. Part of it will certainly germinate, an even smaller part will survive to adulthood. But the population of such trees is at great risk, because the parent is competing with its own children in a small area. You need to spread in all directions and occupy free spaces, then the species will flourish.
Summary: due to the presence of hydrogen bonds in water molecules, the configuration of the O-H covalent bonds changes, with the accumulation of additional energy in them, released during cooling and working as an additional heating that prevents freezing. In hot water, the hydrogen bonds are stretched, the covalent bonds are not strained, the energy storage is low-cooling and freezing is faster. There is a certain characteristic time tau required for the formation of hydrogen bonds; if the cooling process proceeds slowly, then the Mpemba effect will disappear. If the cooling process proceeds relatively quickly (up to tens of minutes), then the effect is pronounced. Probably, there must also be some critical temperature, starting from which the effect appears, but this is not reflected in the article.
Would it surprise you if I said that BASIC is still relevant? In addition to being the progenitor of modern home computing, the language is still viable even outside the retro-enthusiast circles. We propose to plunge into a brief overview of the history of its formation, starting from the basics and ending with modern implementations.
The website and online store "Eldorado" is about 40 thousand purchases every day. There is probably no need to explain what this means for the company's business.
Historically, the store runs on the Bitrix engine with a huge amount of custom code and add-ons. The storage is a MySQL cluster with four master servers.
A significant number of companies have monolithic applications, and many have to work with them. There are plenty of ways to deal with the monolith, but, unfortunately, few people write about successful ones. I hope that the story of how we prop up our monolith (until we saw it) will be of interest to you.
We are well aware that massive architecture can bring a lot of problems. But it is easy to destroy it, by a simple strong-willed decision, it is impossible: sales are going, the site should work, changes for users should not be radical. Therefore, the transition from a monolith to a set of microservices takes time, which we need to hold out: to ensure the system is operational and its resistance to stress.
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.
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.
The past year turned out to be difficult, but nonetheless rich in fundamental discoveries and technological breakthroughs. Today we will talk about the most memorable results. Credit: scitechdaily.com
Slightly less than the fastest, portable, 64-bit hash function, with decent quality.
Yes, in the air and in the king, about like that. Read on?
Instead of Disclaimer We drop the definition of hash functions along with a detailed listing of properties and requirements for their cryptographic application, assuming that the reader either owns the necessary knowledge minimums, or will make up for them . Also we agree that here and further we mean non-cryptographic (cryptographically non-persistent) hash functions, unless otherwise specified.