Snap has announced its third-generation Spectacles smart glasses. The new model is noticeably different from the Spectacles 2 version. The new smart glasses are equipped with two HD cameras, with which you can shoot 3D first-person video at 60 frames per second, as well as take photographs. These videos and photos can be sent wirelessly to your phone, added with 3D Snapchat effects, and shared […]
Laser weapons are no longer science fiction, although a lot of problems remain with their implementation. The weakest point of laser weapons remains their power plants, the energy of which is not enough to defeat massive targets. But you can start with less? For example, hitting light and nimble enemy drones with a laser, which is expensive and unsafe if conventional anti-aircraft […]
Six-core Ryzen 5 processors gained widespread recognition long before AMD was able to switch to the Zen 2 microarchitecture. Both the first and second generations of six-core Ryzen 5 were able to become quite a popular choice in their price segment due to AMD’s policy of offering customers more advanced multi-threading, than Intel processors can provide, at the same or even […]
The translation of the article was prepared specifically for students of the Data Engineer course. ClickHouse is an open source columnar database. It's a great environment where hundreds of analysts can quickly query detailed data, even as tens of billions of new records are entered per day. Infrastructure costs to support such a system can reach $100 per year, and […]
TL;DR: Description of the client-server architecture of our internal network configuration management system, QControl. It is based on a two-layer transport protocol that works with gzip-packed messages without decompression between endpoints. Distributed routers and endpoints receive configuration updates, and the protocol itself allows the installation of localized intermediate relays. The system is built on the principle of differential backup (“recent-stable”, explained below) and uses a query language […]
We are discussing a device for transmitting directional sound. It uses special “acoustic lenses”, and its operating principle resembles the optical system of a camera. About the variety of acoustic metamaterials Engineers and scientists have been working with various metamaterials, the acoustic properties of which depend on the internal structure, for quite a long time. For example, in 2015, physicists managed to 3D print an “acoustic diode” - it is a cylindrical […]
Recently, on the Internet you can find a huge amount of materials on the topic of analyzing traffic on the network perimeter. At the same time, for some reason everyone completely forgot about analyzing local traffic, which is no less important. This article addresses precisely this topic. Using Flowmon Networks as an example, we will remember the good old Netflow (and its alternatives), consider interesting cases, […]
All an attacker needs is time and motivation to break into your network. But our job is to prevent him from doing this, or at least to make this task as difficult as possible. We need to start by identifying weaknesses in Active Directory (hereinafter referred to as AD) that an attacker can use to gain access […]
When I still lived in an apartment building, I encountered the problem of low speed in a room far from the router. After all, many people have a router in the hallway, where the provider supplied optics or UTP, and a standard device was installed there. It’s also good when the owner replaces the router with his own, and standard devices from the provider are like […]
American Nobel laureate in chemistry Kary Mullis died in California at the age of 74. According to his wife, death occurred on August 7. The cause is heart and respiratory failure due to pneumonia. James Watson himself, the discoverer of the DNA molecule, will tell us about his contribution to biochemistry and for which he received the Nobel Prize. Excerpt from […]
At the very beginning of my career, I did not know many important things that are extremely useful for a beginning developer. Looking back, I can say that many of my expectations were not met, they were not even close to reality. In this article, I will talk about 20 things you should know at the start of your web developer career. The article will help you form [...]
Among the innovations: It is allowed to refer to enum variants through type aliases, for example through Self. cargo vendor is now included in the standard delivery. With cargo vendor, you can explicitly download and use a complete copy of all source code for all dependencies. This is useful for companies with monorepositories that would like to store and analyze all the source code used in […]
