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• The method of phase-magnitude interpolation (PMI)

• Accurate measure of frequency, magnitude and phase of signal harmonics

• Detection of resonances

The Fast Fourier Transform (FFT) algorithm is an important tool for analyzing and processing signals of various nature.

It allows to reconstruct magnitude and phase spectrum of a signal into the frequency domain by magnitude sample into the time domain, while the method is computationally optimized with modest memory consumption.

Although there is not losing of any information about the signal during the conversion process (calculations are reversible up to rounding), the algorithm has some peculiarities, which hinder high-precision analysis and fine processing of results further.

The article presents an effective way to overcome such "inconvenient" features of the algorithm.

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In this article I'd like to describe different traffic mirroring options for HPE Virtual Connect modules. I try to answer two questions: "What options work and why?" and "How different traffic mirroring cases can be implemented?"

After Epic released the UE5 technology demo at the beginning of 2021, the discussion about UE5 has never stopped. Related technical discussions mainly centered on two new features: global illumination technology Lumen and extremely high model detail technology Nanite. There have been some articles [1 ][2] analyzing Nanite technology in more detail. This article mainly starts from the RenderDoc analysis and source code of UE5, combined with some existing technical data, aims to provide an intuitive and overview understanding of Nanite, and clarify its algorithm principles and design ideas, without involving too many source code level Implementation details.

Overview

Sometimes all of us need to make a graphical installer for one's own linux distro. It goes without saying that you are able to use a distro-specific installer like Anaconda for RedHat-based or DebianInstaller for debian-based. On the other hand Calamares is a graphical installer which is not aligned with only one package manager.

I want to share my experience how to make a universal install solution with GUI. I did not find any complete article about it, hence, I reinvented the wheel.

Lumen is UE5’s GI system, it is different from the traditional real-time GI which only includes the contribution of indirect diffuse reflection. It also includes indirect diffuse reflection and indirect highlight, providing a new set of complete indirect lighting. Lumen supports both hardware-based RTX and software-based Trace algorithms. The starting point of this article is that Lumen GI uses the process, algorithm, and data structure analysis of indirect diffuse reflection part based on software Trace to understand the basic principle and operation mechanism of Lumen from a macro perspective.

The core of Lumen includes the following parts:

Today, we will share some knowledge points related to resource memory leak. A memory leak is the most common issue that we continuously see and also are afraid of. What is the reason behind it? Because we can’t predict the extent of the leak before we locate the leak bottleneck, we had no idea whether it will burst out at a certain moment on the line. We have received feedback from developers that their players had no problem playing for half an hour, but they would get more and more stuck after 3 to 4 hours of playing, which they never expected before. How can it be solved? Today’s sharing will answer such questions.

UWA’s GOT Online-Assets report has a resource occupancy trend chart. If there is a rising trend like the one below, you must pay special attention.

The spread of cryptocurrencies contributed to the development of many solutions based on a distributed ledger technology (blockchain). Although the scope of these solutions varies, most of them have the same basic set of security services, i.e. confidentiality, authenticity, and integrity. These features are granted by the practical applications of public key cryptography, in particular,  digital signature (DS). But unlike many other applications of public key cryptography, cryptocurrency networks do not use public key certificates. This is the aspect that we would like to talk about.

In the green energy field, the solar panels composed of bendable solar cells tend to significantly increase in popularity last time. The difficulty during the designing of the different devices (such as solar chargers, MPPT-controllers) emerges because of the strong lack of technical information about this kind of solar cell.  

In this article, the equivalent scheme of the bendable solar produced by the Sunpower company - Maxeon gen 5 and its coarse simulation model is proposed.

After completion of the System Beeps, I wasn’t planning to make another stand alone album release with the pseudo polyphonic music, as I felt the topic had been explored enough. This, however, wouldn’t mean I couldn’t apply the experience and skills gained to make more utilitarian stuff, like an actual retro game OST or an old school demoscene project. Such an opportunity arose in Autumn 2020, as David Murray of The 8-bit Guy Youtube channel fame announced his new game to be in development, the Attack of The PETSCII Robots for Commodore PET and some other Commodore 8-bitters. As I previously worked with David on his previous big release, Planet X3 game for MS-DOS, and this was a perfect opportunity to satisfy my interest towards the pre-graphics era PCs as well as apply my vast experience both in the minimalistic computer music and 6502 assembly programming, I offered my services that had been accepted. Besides the sound code I also had hopes to participate as a music composer this time.

Unfortunately, this time the project didn’t went well on my side, and lots of issues of all kinds eventually turned it into a small scale development hell (you can learn more from a series of posts at my Patreon blog)  The end result was that my code and sound effects were only used in the VIC-20 port, and music for other versions has been created by other people. However, I was left with the full working code of the sound system for PET, and a number of music sketches. It would be a pity to file it into the archive, PET projects aren’t a frequent thing these days, so another chance to use the stuff wouldn’t come any time soon. So I got the idea to develop my music sketches into full songs, and release it as an alternative OST, and having David’s approval it has been done and released in the Winter 2021 as Faulty Robots, a small music album for PET that is available as a digital audio release and a runnable program for the actual PET computer.

Do you plan to start a cryptocurrency exchange business? If so, now is the perfect time. The easiest and safest way to make money from cryptocurrencies is to create a crypto-exchange application. Regardless of whether traders and investors make or lose money, the cryptocurrency exchange will remain a winner in any case.

But, how to open a cryptocurrency exchange app? So, let’s look at the main stages of the process.

Ссылка на русскую версию / link to Russian version

FPGA InsideOut is an attempt to make a set of educational FPGA videos presented in the “human-in-the-loop” style. In these videos we will not only show how we are interfacing with an actual FPGA board but will also provide synchronous real-time visualisation of FPGA's internal logic.

For our first video we have picked a CRC circuit (cycle redundancy check) which is based on a linear feedback shift register. This circuit goes through several transformations during the course of the video. Intrigued? - let’s watch the video.

A 3rd order high-pass filter with 1 Op Amp can be used together with a 3rd order low-pass filter with 1 Op Amp to make a frequency splitter, for example. Design is similar to a 3rd order low-pass filter, so let’s do it.

When you have an IT, which supports all aspects of your organization automated performance and you have a firm confidence that IT executes well, there is always a chance that something could go wrong in technology or in related IT processes. Depending on complexity of IT environment varieties of risks scenarios could arise. This article as a summary of different faithworthy sources aims to help you in getting high level understanding on what could go wrong and how you can predict it in a more conscious way.

My name is Max Tornov and I have been working in various IT areas for a long period of time, since then, for over 13 years I am working in the area of IT risk management with specialization in IT audit and internal control effectiveness assessment.

I am sure that at the present the topic of Information Technologies risk management became more vital. Organization’s efficiency in IT risk management directly affects the achievement of various organization’s goals, goals which have dependency on IT, those goals may include reliability and efficiency of business processes, the organization's compliance with regulatory requirements, the integrity of financial reporting, and many others.

I sincerely hope that this material will be useful to you and may give you some new ideas that you can contribute to the benefit of your personal development and the development of your organization's risk management culture.

Today, we'll talk not of classic FDM 3D-printers such as the Creatbot DX but about food 3D printing.

Israeli company Redefine Meat has launched five new "meat" products. No cow or lamb was harmed in the process, because all these steaks and sausages are 3D-printed using plant biomass.

Autodesk, a leader in the development of solutions for design, construction, development, production, animation and graphics, held an annual conference that brought together professionals from all over the world.

Automotive manufacturer Škoda Auto received an award from the Czech Republic’s Confederation of Industry for its ‘More flexible with 3D print farms” project of integrating additive technologies into manufacturing. The company mainly uses domestic 3D printers by Prusa Research. 

In this article, we are talking not of desktop 3D printers like the Creatbot DE but about powders for the production of metal parts.

The Tula powder metallurgy plant Polema (part of the Industrial and Metallurgical Holding) has mastered the production of high-entropy alloys and NiCrAlY coatings for import substitution in aircraft construction and other industries. These alloys are suitable for the manufacture of products using 3D printing.

Nowadays, 3D printing solutions are of great interest for companies of any profile. According to experts, by 2025, the global market for additive technologies will be worth $32 billion, and by 2030, it will be $60 billion. 3D printing is actively used for the creation of art modes, in the automotive industry, construction, film industry, and even in the field of fashion. Printing technologies are especially relevant in healthcare — not only as visual aids for future physicians but also for the treatment of various diseases. Many of the latest advances in medical science have been made thanks to 3D printing, and in the foreseeable future, artificial organs and even medicines can be created by means of these technologies. Let's take a look at how 3D modeling and 3D printing help companies achieve great results with relatively small investments.

CreatBot is a 3D printer manufacturer based in China. The CreatBot D600 is one of their most successful devices. This 3D printer can work with various materials, including demanding ones. It offers industrial-grade quality, high level of precision and large-scale 3D printing.

The newer version, the D600 Pro, was developed and released later, in 2018 (the original D600 has been available since 2016). It’s designed to work with an even wider range of materials, including Nylon and polycarbonate. 

Both versions feature a massive build volume of 600 x 600 x 600 mm and dual extrusion.