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Habr β How to become an author My feed All streams Development Admin Design Management Marketing PopSci Search Settings Login Pull to refresh MY FEED Feed settings Dropdown Type Articles Posts News Rating limit All ≥0 ≥10 ≥25 ≥50 ≥100 Level of difficulty All Easy Medium Hard Warning To set up filters sign in or sign up Apply Article top3dshopinc 52 minutes ago 3D PRINTING FOR KIDS Reading time 5 min Views 11 Top 3D Shop corporate blog Tutorial 3D printing, a revolutionary technology, has now become accessible to kids, sparking their imagination and creativity. This tool not only entertains but also educates, providing a unique learning experience. Read more Rating 0 Add to bookmarks 0 Comments 0 Article top3dshopinc 1 hour ago DESKTOP LASER CUTTER: A COMPREHENSIVE GUIDE Reading time 6 min Views 24 Top 3D Shop corporate blog Review In an era where DIY projects and customization are at an all-time high, desktop laser cutters have emerged as a game-changer for hobbyists, artists, and small businesses alike. This guide dives deep into the world of desktop laser cutters, providing you with everything you need to know to get started on your cutting and engraving journey. Read more Rating 0 Add to bookmarks 0 Comments 0 Article top3dshopinc 18 hours ago TRILAB DELTIQ 2 3D PRINTER REVIEW Reading time 6 min Views 40 3D printers Top 3D Shop corporate blog Review The TRILAB DeltiQ 2 is not just a 3D printer; it's a testament to the innovation and quality that TRILAB brings to the 3D printing industry. Founded on the principles of precision engineering and user-centric design, TRILAB has carved a niche for itself among 3D printing enthusiasts and professionals alike. The DeltiQ 2, their flagship model, encapsulates the company's commitment to delivering high-quality, reliable, and accessible 3D printing solutions. This section explores the DeltiQ 2, shedding light on its inception and the ethos of its manufacturer. Read more Rating 0 Add to bookmarks 0 Comments 0 Article top3dshopinc 20 hours ago APPLICATION OF 3D TECHNOLOGIES IN ONLINE LEARNING K-12 Reading time 5 min Views 27 Top 3D Shop corporate blog Tutorial The realm of K-12 education is undergoing a significant transformation, thanks to the integration of 3D technologies in online learning. This new dimension in education is not just a fad; it's a revolutionary approach that's reshaping the way students learn and interact with educational content. Read more Rating 0 Add to bookmarks 0 Comments 0 Article top3dshopinc 21 hours ago HOW 3D PRINTERS WORK Reading time 5 min Views 39 Top 3D Shop corporate blog Tutorial 3D printing, also known as additive manufacturing, is a transformative technology that has revolutionized the way we create objects. At its core, 3D printing involves creating physical objects from digital models by adding material layer by layer. This innovative process has made it possible to produce items with complex geometries that were previously impossible or too expensive to manufacture with traditional methods. The evolution of 3D printers can be traced back to the 1980s, when the first processes for additive manufacturing were developed. Initially, these technologies were used primarily for prototyping purposes in industrial settings. However, over the decades, advancements in technology have expanded the capabilities of 3D printers, making them faster, more affordable, and capable of working with a wider range of materials. Today, 3D printing is not just for prototyping; it's used in production, medical applications, fashion, architecture, and more, marking its transition from a niche technology to a mainstream tool. Read more Rating 0 Add to bookmarks 1 Comments 0 Article top3dshopinc 23 hours ago TRILAB 3D PRINTERS OVERVIEW Reading time 5 min Views 23 Top 3D Shop corporate blog Review Welcome to the world of TRILAB 3D printers, where innovation meets precision to redefine the boundaries of 3D printing. TRILAB has established itself as a beacon of excellence in the 3D printing industry, offering a range of printers that cater to various needs, from educational purposes to industrial applications. In this article, we will delve deep into the essence of TRILAB 3D printers, exploring their history, core technologies, unique features, and the wide range of applications they serve. Read more Rating 0 Add to bookmarks 0 Comments 0 Article top3dshopinc yesterday at 12:13 WOOD LASER ENGRAVING MACHINES Reading time 6 min Views 33 Top 3D Shop corporate blog Tutorial In the dynamic world of craftsmanship and design, wood laser engraving machines have emerged as pivotal tools, bridging the gap between traditional woodworking techniques and the digital age. These sophisticated devices leverage laser technology to carve, etch, or engrave detailed patterns, texts, and imagery onto wood, offering artisans and businesses alike the ability to create with unprecedented precision and creativity. From personalized gifts and home decor to intricate art pieces and custom furniture, wood laser engraving machines unlock a realm of possibilities, transforming simple wood pieces into works of art. Read more Rating 0 Add to bookmarks 0 Comments 0 Article top3dshopinc yesterday at 11:56 CO2 LASER CUTTERS: REVOLUTIONIZING PRECISION CUTTING ACROSS INDUSTRIES Reading time 5 min Views 40 Top 3D Shop corporate blog Laser cutting technology, specifically CO2 laser cutters, has significantly revolutionized the way we approach precision cutting and engraving in various materials across multiple industries. From intricate designs in the craft industry to precise cuts in manufacturing, CO2 laser cutters have become an indispensable tool. Let's dive into the world of CO2 laser cutters, exploring their workings, benefits, applications, and much more. Read more Rating 0 Add to bookmarks 0 Comments 0 Article Meklon yesterday at 11:08 FROM TISSUE ENGINEERING TO THE ADULT INDUSTRY Level of difficulty Easy Reading time 10 min Views 218 WiseOPS corporate blog One of the most traditional topics nowadays is the unexpected career shifts from various professions to IT and vice versa. I have this fantastic colleague – a professional butcher by training. He sets up monitoring systems like a pro and can defend his point of view convincingly. His education certainly plays a part in that. You can also include me among those with a peculiar career switch. As many remember from my previous posts – I originally started as a doctor, who then veered towards fundamental science and tissue engineering. All those diversions with stem cells, growing organs in bioreactors, and other atypical experimental tasks. And then, out of the blue, I was invited for an interview at a large telecom company... Long story short, I found myself as a DevOps in a company dealing with complex projects, some of which are about adult videos. Yes, those very special educational movies for adults that drive progress, with petabytes of traffic, millions of users, and all the other joys. Here’s how it works for us - there comes a time in a business when they realize, that's it. We've arrived. The infrastructure is working, everything seems fine, but it's built on hacks carefully laid by three generations of employees. There’s no documentation, nobody remembers how it all works. If a server dies, resurrecting it would be a miracle. And that's usually the moment when we, the WiseOps team, come in. We start dissecting every nut and bolt of the archaeological layers of code, architecture, and business logic. We already have dozens of clients, three of whom are in the video content business. Let's dive deeper, and I'll try to show you what this whole industry looks like through the eyes of a doctor/bio-engineer/DevOps. Read more Total votes 3: ↑3 and ↓0 +3 Add to bookmarks 0 Comments 0 Article top3dshopinc Feb 6 at 16:37 INTAMSYS FUNMAT PRO 610 HT 3D PRINTER OVERVIEW Reading time 4 min Views 54 3D printers Top 3D Shop corporate blog Review In the vast and dynamic realm of 3D printing, the Intamsys Funmat Pro 610 HT emerges as a groundbreaking solution, specifically engineered for those seeking to harness the capabilities of high-temperature materials. This printer not only distinguishes itself through its remarkable material versatility but also sets new benchmarks for what professionals and enthusiasts alike can achieve in their 3D printing ventures. Read more Rating 0 Add to bookmarks 1 Comments 0 Article SergeyBPshenichnikov Feb 6 at 15:12 ALGEBRA OF MUSICAL TEXT Level of difficulty Medium Reading time 5 min Views 86 Entertaining tasks Data Mining *Mathematics *Natural Language Processing * FAQ Translation Sergey Pshenichnikov, Tatiana Sotnikova ALGEBRA OF MUSICAL TEXT Sergey Pshenichnikov, Tatiana Sotnikova Trio Sapiens Musical text can be represented using matrix units, like the description of verbal texts and other symbolic sequences. In the future, mathematical recognition, and creation of musical sense with substantive justification for intermediate calculations (as opposed to AI) may become possible. Sound has four properties: pitch, duration, volume, and timbre. Timbre is not considered yet. The dictionary of the algebra of musical texts is built on the basis of musical notation for the piano. The duration here, for the sake of brevity of the first presentation, is considered as «absolute». «Relative» is not considered, although intervals are very well studied, and their features will be needed to categorize composers. The complexity of the musical text for the application of mathematics is explained by the desire to simplify the reading of musical notes by musicians and to minimize the use of lower and upper additional lines. To apply text algebra to musical symbolic sequences there is no need to use a five-line staff. What is useful and familiar to musicians is «unbearably harmful» for the use of algebra. It seems advisable to use a one-line staff. In this case, the musical text becomes like the verbal text. To solve the problem, you need to find a transformation of the canonical musical text into a «thread». And as always, for a new application of algebra, correct coordination of the subject area is necessary. In this case, each used musical notation and symbol of modern musical notation must be assigned its own serial number (natural number). Instead of a sign, you can use the names of each note symbol - then it will be a verbal notation of musical texts written in one line «thread»). Since the musical scale is completely represented by piano keys, the first section in height of the dictionary of musical texts consists of 88 numbered white and black keys (of which 52 are white). This eliminates the need for an octave division of the scale, octave transfer signs, keys, five alteration signs (key and random), diatonic and chromatic semitones. All notes of the scale became fundamental in algebraic musical notation. There is an order of magnitude more of them of them than the main stages of Guido Aretinsky, but the alteration signs and names of octaves disappeared, the use of which made musical texts algebraically incompatible with verbal texts. Numbers from 1 to 88 in algebraic notation constitute a fragment of the pitch dictionary for the «thread» one-line staff. Numbering (coordination) of notes is needed to become in the future indices of mathematical objects (matrix units), which will replace the signs of notes or their names. These matrix units are binary generalizations of integers (hyperbinary numbers). The operation of division with remainder is defined for them, as for integers. The operation will allow you to divide musical texts and their f Read more Rating 0 Add to bookmarks 1 Comments 0 Article SergeyBPshenichnikov Feb 6 at 14:48 ALGEBRA OF SENSE Level of difficulty Medium Reading time 12 min Views 46 Data Mining *Natural Language Processing * FAQ Translation Sergey Pshenichnikov Sign sequences (for example, verbal and musical texts) can be turned into mathematical objects. Words and numbers have become one entity, a representation of a matrix unit, which is a matrix generalization of integers and a hypercomplex number. A matrix unit is a matrix in which one element is equal to unit, and the rest are zeros. If the words of the text are represented by such matrices, then concatenation (combination while maintaining order) of words and texts becomes an operation of adding matrices. You can perform transformations with texts using algebraic operations, for example, dividing one text by another with a remainder. Mathematically recognize the sense of text and calculate the context of words. In this case, algebra helps to interpret all the intermediate stages of calculations. A person sees and hears only what he understands (J.W. Goethe). Understands what he attaches sense to as significant for him. Sense is subjective and depends on the interests, motivations, and feelings of different people. L. S. Vygotsky distinguished between the concepts of «sense» and «meaning»: «if the «meaning» of a word is an objective reflection of a system of connections and relationships, then « sense» is the introduction of subjective aspects of meaning according to a given moment and situation». According to G. Frege, «meaning» are properties, relationships of objects, «sense» is only part of these properties. In this case, both “meanings” and «sense» are called one «sign», for example a word. Two people can choose from a list of meanings for one word two non-overlapping fragments (two senses) to interpret it. Read more Rating 0 Add to bookmarks 1 Comments 0 Article top3dshopinc Feb 6 at 13:26 TRILAB AZTEQ INDUSTRIAL 3D PRINTER Reading time 4 min Views 25 Top 3D Shop corporate blog Review The TRILAB AzteQ Industrial 3D Printer stands as a beacon of innovation in the rapidly evolving landscape of additive manufacturing. This machine is not just another entry in the industrial sector; it is a testament to the leaps and bounds by which 3D printing technology has grown. Offering a combination of precision, scalability, and material compatibility, the AzteQ is designed to meet the demanding needs of industries ranging from aerospace to automotive and beyond. Read more Rating 0 Add to bookmarks 0 Comments 1 +1 Article top3dshopinc Feb 6 at 12:59 ACRYLIC LASER CUTTER MACHINES: AN ESSENTIAL GUIDE Reading time 5 min Views 43 Top 3D Shop corporate blog Tutorial In the world of fabrication and design, acrylic stands out for its versatility and aesthetic appeal. When paired with the precision of laser cutting technology, the possibilities become virtually endless. Acrylic laser cutting involves the use of a laser to cut acrylic material into various shapes and sizes, offering unparalleled precision and efficiency. This process not only enhances productivity but also opens up new avenues for creativity and innovation in design. Read more Rating 0 Add to bookmarks 0 Comments 0 Article top3dshopinc Feb 5 at 15:20 INTAMSYS FUNMAT PRO 410 3D PRINTER: REVOLUTIONIZING HIGH-TEMPERATURE 3D PRINTING Reading time 5 min Views 78 Top 3D Shop corporate blog Review In the rapidly evolving world of 3D printing, the Intamsys Funmat Pro 410 stands out as a beacon of innovation, especially in the realm of high-temperature 3D printing. This powerhouse is designed to meet the demanding needs of professionals across various industries, from aerospace to automotive, offering unparalleled versatility and precision. Let's delve into what makes the Funmat Pro 410 a must-have for any serious 3D printing enthusiast or professional. Read more Rating 0 Add to bookmarks 0 Comments 0 Article top3dshopinc Feb 5 at 13:20 RAISE3D 3D PRINTERS OVERVIEW Reading time 5 min Views 36 Top 3D Shop corporate blog Review Raise3D printers have carved a niche in the 3D printing world, known for their reliability, high-quality output, and versatility across various industries. From startups to educational institutions, these printers offer a range of features designed to cater to the diverse needs of its users. Let’s dive into what makes Raise3D stand out in the crowded 3D printing market. Read more Rating 0 Add to bookmarks 0 Comments 0 Ads Article top3dshopinc Feb 5 at 13:06 FLASHFORGE GUIDER 2S 3D PRINTER: A COMPREHENSIVE GUIDE Reading time 5 min Views 34 Top 3D Shop corporate blog Review The FlashForge Guider 2s is the latest addition to the world of 3D printing, offering an impressive blend of high-quality printing capabilities, robust build, and user-friendly features. Designed for both hobbyists and professionals alike, this 3D printer aims to streamline the creative process, making it easier to bring complex designs to life. Read more Rating 0 Add to bookmarks 0 Comments 0 Article YuriPanchul Feb 2 at 23:35 VERILOG MEETUPS @ HACKER DOJO: THE STATUS AND THE PLANS FOR FEBRUARY 2024 Reading time 9 min Views 837 High performance *Open source *FPGA *Programming microcontrollers *Manufacture and development of electronics * The first three meetups of the Portable SystemVerilog Examples group at Hacker Dojo in Mountain View, California were a kind of brainstorming sessions. We discussed the electronic industry, the essence of modern chip design, and the challenges to educate new design engineers. Now we are moving into a new mode of action. We are going to have weekly meetings of the core R&D team and monthly or bi-monthly events for a larger audience. We are focusing on interview-level microarchitectural and CPU design examples, providing FPGA vendor-neutral infrastructure and compatibility with open-source ASIC design tools. Read more Total votes 3: ↑3 and ↓0 +3 Add to bookmarks 4 Comments 3 +3 Article TechniXC Jan 31 at 10:54 SPRING CLOUD GATEWAY: THE SINGLE POINT OF ENTRY OR FAILURE – A PATH TO NON-BLOCKING API GATEWAY Level of difficulty Hard Reading time 20 min Views 541 High performance *Java *API *Microservices *Росбанк corporate blog Tutorial Hello Habr! My name is Nikita Letov. I am a tech lead of backend development in remote banking services for individuals (or retail department) of Rosbank. In this article I will describe what a point of entry to an app is, when it becomes vital, and how API Gateway can help you. We'll review a traditional blocking pattern based on Netflix Zuul 1.x gateway with all its problems of using, then reactive Spring Cloud Gateway and difficulties of moving to it. Finally, we'll compare these two approaches. Read more Total votes 1: ↑1 and ↓0 +1 Add to bookmarks 2 Comments 0 Post dbalabolin Jan 27 at 19:09 Views 11K Health Transport В аэропортах продают подушки для сна сидя в полете. Надувные и обычные. Надувные удобнее носить и возить, но они долго не живут. А обычные по размеру как ручная кладь в Победе. Обычная сверху и надувная снизу Если вам нравятся надувные, то полезно знать, что в полете давление в самолете на 25 процентов меньше чем на земле. Поэтому если надуть подушку нормально еще до взлета, то она при наборе высоты будет раздуваться пока швы не разойдутся. Надо ее или сдувать по мере взлета или надувать уже на высоте. А не надувным подушкам высота не страшна. 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