Author: ProHoster

Rolls-Royce relies on small nuclear reactors to produce synthetic fuel

Rolls-Royce Holdings is promoting nuclear reactors as the most efficient way to ensure the production of carbon-neutral synthetic aviation fuels without placing a significant burden on the global electrical grid. Based on technology developed for nuclear submarines, Small Modular Reactors (SMRs) can be deployed at individual stations, CEO Warren East said. Despite the small size […]

Performance Comparison of Block Bypass ToolsVPN

As we are increasingly denied access to various resources on the network, the issue of bypassing locks becomes more and more relevant, which means that the question “How to bypass locks faster?” becomes more and more relevant. Let's leave the topic of efficiency, in terms of bypassing DPI whitelist blacklists, for another case, and just compare the performance of popular lock bypass tools. Attention: In the article under […]

Created "paper" fiber, which will turn the world of humidity sensors

Some time ago, in the journal Cellulose, a study was published by Finnish scientists who talked about the creation of an optical fiber from cellulose. The idea to create light-conducting fiber structures first took shape in 1910. Many decades later, fiber optic cables have become an everyday reality and an indispensable means of energy-efficient transmission of information over tens of thousands of kilometers. The cellulose fiber created by Finnish scientists is no good […]

Creating a Discord bot on .NET Core with deployment to a VPS server

Hello Khabrovites! Today you will see an article that will show you how to create a bot using C# on .NET Core and how to run it on a remote server. The article will consist of a background, a preparatory stage, writing logic and transferring the bot to a remote server. I hope this article will help many beginners. Background It all started in one sleepless […]

PostgreSQL Antipatterns: CTE x CTE

By the nature of the activity, one has to deal with situations when a developer writes a request and thinks “the base is smart, it can handle everything on its own!” In some cases (partly from ignorance of the capabilities of the database, partly from premature optimizations), this approach leads to the appearance of “Frankensteins”. First, I will give an example of such a query: - for each key pair, we find the associated field values ​​WITH RECURSIVE cte_bind AS […]

Most supercomputers run Linux - discussing the situation

As of 2018, five hundred of the world's highest-performing systems run on Linux. We discuss the reasons for this situation and present the opinions of experts. Photo - Rawpixel - PD State of the market So far, Linux is losing to other operating systems in the fight for the PC market. According to Statista, Linux is installed on only 1,65% of computers, while the […]

Introducing Programmable AWS Landing Zone in Terraform Module

Hi all! In December, OTUS is launching a new course - Cloud Solution Architecture. In anticipation of the start of this course, we are sharing with you a translation of interesting material on the topic. AWS Landing Zone is a solution that helps customers quickly set up a secure AWS multi-account environment based on best practices. For more than five years of existence, our […]

We bring the linear regression equation into a matrix form

The purpose of the article is to provide support to beginning data scientists. In the previous article, we outlined three ways to solve a linear regression equation: analytical solution, gradient descent, stochastic gradient descent. Then for the analytical solution we applied the formula. In this article, as the title suggests, we will justify the use of this formula or, in other words, we will derive it ourselves. Why does it have […]

Digital events in Moscow from December 9 to 15

A selection of events for the week Tigran Khudaverdyan at BellClub December 09 (Monday) New square 6 from 10 rub. On December 000, Yandex Managing Director Tigran Khudaverdyan will visit BellClub members. Tigran has been working for the company since 9. It was he who earned her the second billion dollars (which Arkady Volozh dreamed of) by heading Yandex.Taxi in 2006. iMetrics […]

Front-end dojo: projects to train developer skills (5 new + 43 old)

1. Notion clone The Notion application is loved by many; it allows you to optimize your workflow, work with documents, schedule tasks, and synchronize data between devices. www.notion.so What you will learn by creating a Notion clone: ​​HTML Drag and drop API. The user can “grab” a draggable element with the mouse and place it in the droppable zone. How to synchronize data in real time between your computer and […]

Digital events in St. Petersburg from December 9 to 15

A selection of events for the week Mini-Hyperbaton: documentation generation December 11 (Wednesday) Piskarevsky Avenue 2k2Shch free We invite technical writers to the Mini-Hyperbaton, dedicated to documentation generation. Speakers from Yandex will talk about the capabilities of Swagger/Open API. Mini-Hyperbaton is designed for a small number of guests and is aimed at live communication. Those who cannot attend the meeting will be able to watch the recorded reports. ok.tech: QATOK 11 […]

[Video animation] Wired world: how in 35 years a network of submarine cables entangled the globe

You can read this article from almost anywhere in the world. And, most likely, this page will load in a couple of seconds. Gone are the days when image pixels were loaded line by line. Now even HD quality videos are available almost everywhere. How did the Internet become so fast? Due to the fact that the speed of information transfer has reached almost the speed [...]