• What are the application areas of 3D printing?

    What is 3D printing?

    3D printing is a new way of manufacturing solid objects based on the principle of discrete-stacking.
    With the evolution of the trend, 3D printing has become a way to promote smart manufacturing, flexible manufacturing and green manufacturing. It can realize the integrated formation of complex structures that are difficult to process or even cannot be processed by traditional manufacturing technologies, greatly enhancing the process realization capability. Subversive advancement in equipment design and manufacturing.

    From the past used to manufacture models, and now gradually realize the direct manufacturing of products, 3D printing manufacturing technology is developing towards the integration of “design-material-manufacturing”. According to research, the size of the world 3D printing market in 2017 was 3.86 billion US dollars. In 2018, the scale of China's 3D printing market was as high as 7.75 billion US dollars, which has more than doubled in two years. From behind the scenes to the forefront of the industry, the development of the 3D printing industry has moved from the concept introduction period to the rapid development period, all thanks to: "application." Members of the World 3D Printing Association have said:

    When 3D printing technology goes out of the lab,
    Its development motivation lies in its application
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  • How to run Scrum efficiently in 2019? Quick guide for beginners

      Every «hype» thing or event has a certain regularity: the more people talk about it, the less they really know about it. Scrum is not an exception. You may find hundreds of relevant articles and IT news, where it may seem that there is only one best Agile methodology and this is Scrum. A large Agile family contains various powerful methodologies and Scrum is not the sole system of implementing Agile principles. However, this methodology is still actively used all over the world.

      People go mad about Scrum: many IT blogs write about it, many practical courses promise to teach all Scrum features, many companies want to see a working experience with Scrum in CVs, and so on. Scrum conquers them all. In this post, we define why.

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    • Weak UI, weak programmer

        UI facepalm

        Why do so many programmers hate UI work? Because it is tedious. Especially, for the Web, but other types of UI are only slightly easier. Layouts, margins, paddings — neverending stream of little tweaks to make it look OK on all sane environments, and somehow this freaking button sometimes overlaps that input field. Rrrr! And yes, it should not hang on button clicks, which means a lot of asynchronous programming, which is a nightmare.

        And don’t even speak about aesthetics and usability! Choose right colours, element sizes and locations, find/draw images and put them where they fit, think about user workflows — isn’t it a designers’ or Ux specialists’ job?! Leave me alone, I’m a programmer. I work with backend layers, where everything is straightforward and linear, there are no buttloads of different environments to adjust to, and design is guided by mere logic without pesky fussing with ‘user friendliness’ and ’beauty’!

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      • Using Linux Kernel Sequence Files

          A characteristic feature of modern programming is the use of the global network as a source of reference information, in particular, a source of patterns for solving unknown or little-known problems for a specific programmer. Such an approach saves a lot of time and often gives quite qualitative results. However, the solutions laid out in the network although usually correct, do not always take into account all the subtleties of solving a problem, which leads to the appearance in the source code of sections that usually work correctly, but under not quite standard circumstances become sources of unpleasant surprises.

          Consider the topic of using sequence files in the Linux kernel, such files are considered to be the most convenient mechanism for printing from kernel mode. But in practice, using them correctly is much more difficult than you would think.

          A lot of materials on this topic are available online. The best is the source code of the kernel itself which has quite detailed comments. The problem with this source of information is its volume. If you do not know exactly what to look for, it is better if you only have limited time, not to try at all. For me, when I became interested in the topic, Google provided several seemingly excellent sources of information relating to my search: the famous book The Linux Kernel Module Programming Guide and a series of articles by Rob Day. These sources are not new, but very solid.
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        • Notifications: action required for take profit / stop loss. In case your Broker doesn't support those orders

            There is a Russian Broker — Tinkoff Bank. Now here is the problem: the broker doesn't support take profit and stop loss orders. At all. If you want to feel more convenient while trading, then you need some workaround for this situation, until Tinkoff Bank developers finally release those orders as the killer feature. In the article, I will show you my workaround.
            update:2019-03-22, the Broker published platform 3.0.0 (a major update) in Google Play. The changelog features take profit/stop loss orders
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          • Compilable configuration of a distributed system

              In this post we'd like to share an interesting way of dealing with configuration of a distributed system.
              The configuration is represented directly in Scala language in a type safe manner. An example implementation is described in details. Various aspects of the proposal are discussed, including influence on the overall development process.

              Overall configuration management process

              (на русском)

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            • Google+ is Dead. So what?

                Google shut down their social media platform Google+ on April 2, 2019. It’s hard to find some technical article that hasn’t mentioned the end of Google’s social network era. But, a high level of consistency in connectivity within services of the company had received scant attention. In this article I would like to share my thoughts on the internal way of Google services consistency and what it means for Google API users when it comes to a Google+ shutdown.

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              • Introducing Time Travel Debugging for Visual Studio Enterprise 2019

                  The Time Travel Debugging (TTD) preview in Visual Studio Enterprise 2019 provides the ability to record a Web app running on a Azure Virtual Machine (VM) and then accurately reconstruct and replay the execution path. TTD integrates with our Snapshot Debugger offering and allows you to rewind and replay each line of code however many times you want, helping you isolate and identify problems that might only occur in production environments.

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                • Connect to Windows via SSH like in Linux

                  • Tutorial
                  The most depressing thing for me is to connect to Windows hosts. I'm not an opponent or a fan of Microsoft and their's products. Every product has its own purpose. But it is really painful for me to connect to Windows servers, because of 2 points: it is hard to configure (Hi WinRM with HTTPS), and it is really unstable (Hello RDP to VMs across the ocean).

                  Fortunately, I found the project Win32-OpenSSH. I realized that I want to share my experience with it. I believe it will help somebody and save a lot of nerves.

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                • Advantages and Disadvantages of Using Flutter for Mobile Development

                  Flutter is a new open source framework created by Google that assists in developing native Android as well as iOS apps with one codebase. It is more than just a framework as it is a full software development kit that has everything you require for building cross-platform apps. This Flutter review will look into the advantages and disadvantages of the tool.
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                • uJVM: platform for running Java applications on microcontrollers (MCUs)

                  • Tutorial

                  ИллюстрацияHello dear readers. In this article I will try to demonstrate how to run a Java Virtual Machine and Java applications on microcontrollers. This idea may sound quite outlandish by itself: why use Java on microcontrollers where each byte of RAM and each CPU cycle are precious commodity? There's nothing like native C for microcontrollers — even C++ is rarely used! Yes, I've heard that discussion (and took part in it) for many years. Well, I will try to explain «why», as well as «how», in this article. So, anyone who wants to understand how MCU implementation of JVM works; see an unusual approach to multi-platform project development; take part in Open Source project; or just have fun — welcome onboard, uJVM is ready to take off! People who are ready to criticize can stay near the runway and watch us climb (or crash) from a safe distance

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                • Basic Agile Practices for Technical and Non-Technical Teams in 2019

                    Teams that apply popular Agile practices explain why they have chosen this methodology in their own ways. For someone, it seems obvious to work with obligatory and “sacred” Agile; someone can define non-binding or controversial practices. In any case, Agile is one of the most popular methodologies in project management nowadays. Its practices and concepts are appreciated by many developers and managers around the globe.

                    What are these powerful practices that make Agile popular and trendy? Here we share the list that is definitely incomplete but foundational.

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