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Hello Habr. Probably everyone who has ever seen off or met relatives or friends at the airport has used the free service Flightradar24. It is a very convenient way to track the position of an aircraft in real time. The first part described how such an online service works. Now we will go further and find out what data is transmitted to and received from the aircraft to the receiving station […]
Who are we and what were the premises of the project? Good day, my name is Vladimir Lazarev, I am the head of the BI integrator Analytics Group. We create visual reports for businesses based on marketing, sales, finance, and logistics using leading analytics platforms like Qlik Sense, Power BI, and Tableau. In BI platforms, the visual component is very important. If you have watched dozens of demo reports from BI systems and you […]
We are publishing a report on salaries in the IT industry for the second half of 2018. The report is based on data from the salary calculator 'My Circle,' which collected more than 8,500 salary figures during this period. Let's take a look at the current salaries across all major IT specializations, as well as their annual dynamics both overall and by key regions: Moscow, St. Petersburg, and other cities. More […]
According to Alexander Auzan, Dean of the Faculty of Economics at Moscow State University, the role and activity of 'institutional' economists increase during crises. These are economists who view the problem from a broad perspective. Later, they are followed by 'mainstream' economists, who focus well on narrow, specific issues. The task of 'institutional' economists is to identify general principles, vectors, and trends that can lead to economic growth. Find a unique […]
The term "protection" is a good label for bad deeds. Milton Friedman, "Freedom to Choose". This text results from analyzing some comments on the articles "The Flaw of Likes" and "Economics and Human Rights". In interpreting data and drawing conclusions, some commenters made the typical "survivorship bias" error. What is a "systematic survivorship error"? It refers to acknowledging the known while disregarding the unknown, but existent. An example of "cost" […]
Florian says that perfection is boring since we all solve problems. When we see something imperfect, our mind wants to figure out what's happening — we become curious. On the other hand, when something is too irregular or "subpar," we ignore it as irrelevant noise. Arousing curiosity is one thing… but what makes imperfections beautiful? The difference between perfection […]
While I was studying algorithm performance, I stumbled upon this video featuring a mock interview at Google. It not only provides insight into how interviews are conducted in major tech companies, but also helps understand how algorithmic problems are solved as efficiently as possible. This article serves as a supplementary resource to the video. Here, I provide comments on all the solutions presented, along with my own […]
Many are familiar with Scratch, a programming environment for kids, where learning typically involves creating creative projects following the principle of 'from simple to complex'. However, the 'classic approach' to learning programming (variables → branching → loops → functions → structures → objects → …) is difficult in Scratch. However, changing the sequence of learning concepts (let's call them concepts) of structured, object-oriented […]
The movie title is the first thing that catches a viewer's attention. The initial contact with a film determines the interest in it. Much depends on the title regarding whether a person will watch the movie's trailer and go see it in theaters. Considering that the film industry brings media corporations billions of dollars, titles are carefully chosen based on trends, reactions […]
A Primer: What are Prefabricated Data Center Solutions, Their Advantages, and Why They are Gaining Popularity. Big data, cloud computing, and the Internet of Things have become commonplace technologies. The need for continuous processing of vast amounts of information drives more investment into creating data centers and expanding the range of services they offer. According to Synergy Research Group, in 2018 […]
A utility as old and popular as WinRAR has been vulnerable for the past 19 years to an error that hackers and malware distributors can easily exploit, as revealed last month. Fortunately, the software was patched in a recent build 5.70. However, many users have not updated the program in a long time and do so infrequently, so […]
Western Digital has announced comparatively affordable WD Blue SN500 NVMe SSDs, suitable for use in desktops and laptops. The products comply with the NVM Express (NVMe) specification, which describes access to SSDs via the PCI Express bus (in this case, PCIe Gen3 x2). This provides higher read speed performance compared to SATA solutions and […]