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Systems engineering *

Infrastructure and engineering systems

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New plasma rocket engine: A promising experiment harnessing a hybrid of chemical and ion technology

Level of difficultyHard
Reading time37 min
Views1.7K

 Gleb Kulev, Candidate of Technical Sciences

The rapid exploration of outer space has faced a problem related to the insufficient efficiency of modern rocket engines. As a solution to this problem, the concept of a jet engine based on new operating principles is proposed, using a combination of known physical laws and having advantages over known types of jet engines.The article presents the results of testing three modifications of jet engines based on new operating principles and their analysis. The article discusses the physical principles of operation of a jet engine based on new principles, its advantages and problems arising during its creation.

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Total votes 6: ↑6 and ↓0+6
Comments3

Spring Boot Mapping

Level of difficultyEasy
Reading time1 min
Views1.8K

The platform is designed for those who want to enhance their knowledge with simplicity. Programming tutorials and examples written in simple, understandable language for beginners and experienced. Spring Java tutorials provides well contents to learn java, spring framework and also the architecture of spring technology for professionals.

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Handling multidisciplinary project development

Level of difficultyMedium
Reading time4 min
Views748

Multidisciplinary project emerges when multiple teams with different expertise areas join to create a product. Despite the fact the product development is not something happining merely my a wish, product leads often perceive it as an easy walk. Usually this easy walk becomes a crash course. Let's uncover what leads to crash and what is necessary to succeed.

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Comments2

Setting Up an Experiment Environment for Data-Driven Product Development

Level of difficultyMedium
Reading time8 min
Views959

As a product owner, it is common to face the question of whether to proceed with option A or option B. Or, which version of the screen should be implemented to achieve better results? Making such decisions can be challenging, especially when you are under tight deadlines with limited resources. Furthermore, such decisions are made based on personal judgment or copying the approach of a competitor, which can lead to suboptimal results.

The good news is that one can avoid such pitfalls by setting up a simple experiment environment that requires relatively low effort. In this article, we will describe how you can achieve this.

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The Systems Engineering Methodology for Startups

Reading time6 min
Views1.8K

Creating a product startup can be an exciting experience, but it can be a daunting one as well. On average, only 1 out of 10 startups is successful, according to the Global Startup Ecosystem Report. Therefore, to raise your prospects, there are quite a number of important considerations to make in advance. 

Bearing in mind everything you need when launching a startup is a challenging task, so it’d be a sound idea to rely on some well-established methodology. That's why we were inspired by the Systems Engineering methodology, presented in such industry standards as ISO 15288 and CFR21. In this article, we’ll make a brief overview of this methodology and highlight how it can help entrepreneurs to encompass and structure the process of creating and developing a startup.

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Comments3

Introduction to Engineering

Reading time16 min
Views1.9K

This is a set of chapters for young engineers. We give practical advice and discuss goals, challenges and approaches used in modern software engineering.

Along with classical foundations this article contains original ideas of conceptualizing engineer's work with emphasis on bringing order to the situation and finding an insight. Engineering is approached as work in uncertainty with other people which requires special skills. Non-obvious complications regarding modern production in big companies are discussed.

This article is based on 15 years of experience in engineering and management in high-tech industries.

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RS485 — a standard for industrial networks. What are the main features of the transceiver microcircuit?

Reading time8 min
Views2.2K

When building a network for communication between a large number of devices, one may think: what interface to choose? Each interface has its own pros and cons that determine its application: CAN — Automotive, RS485 / RS232 — Industrial, Ethernet — Consumer Electronics / Server. What features of the transceiver microcircuit help to protect against many problems during installation and operation? How is the process of measuring and researching of transceiver microcircuits going on? New RS485 microcircuit is ready to get to market!
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Total votes 4: ↑4 and ↓0+4
Comments0

Architecting Architecture: Makers and Takers

Reading time12 min
Views1.6K

The step has been made. Not sure where to, but for sure from the point of no return. Keep calm and keep walking. It is about time to look around and understand the smelly and slippery route before you. And what are those noisy creatures swarming around our fishy “innovative” design we called Mandelbrot blueprint? You don't get a buzzing noise like that, just buzzing and buzzing, without its meaning something.

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Total votes 4: ↑4 and ↓0+4
Comments1

Architecting Architecture

Reading time6 min
Views2.7K

Architect. This word sounds so mysterious. So mysterious that to understand it you are almost forced to add something. Like “System Architect” or “Program Architect”. Such an addition does not make it clearer, but for sure adds weight to the title. Now you know – that’s some serious guy! I prefer to make undoubtful and around 10 years ago added to my email signature “Enterprise Architect of Information Systems”. It’s a powerful perk. Like “Chosen One”. With architects it is always the matter of naming, you know. Maybe that is why the only way to become an architect is to be named as one by others. Like with vampires. One of them has to byte you! That is probably the easiest way to earn the title as there is no degree or school to grant you one. And if there’s a troubling title, somebody’s making a trouble, and the only reason for making a trouble that I know of is because you’re an Enterprise. Huge old and complex multinational corporation. Like a one-legged pirate. Strong and scary, but not a good runner. You own your ship, you had good days, you have some gold, you need new ways.

To get to new treasures and avoid losing the second leg to piranha regulators and local business sharks swarming waters near every enterprise ship – every pirate has a map. A map is a list of major features and requirements in desired order and priority.

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Total votes 2: ↑2 and ↓0+2
Comments1

Agreements as Code: how to refactor IaC and save your sanity?

Reading time9 min
Views1.2K


Before we start, I'd like to get on the same page with you. So, could you please answer? How much time will it take to:


  • Create a new environment for testing?
  • Update java & OS in the docker image?
  • Grant access to servers?

There is the spoiler from the TechLeadConf. Unfortunately, it's in Russian


It will take longer than you expect. I will explain why.

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Total votes 3: ↑3 and ↓0+3
Comments0

Ansible: CoreOS to CentOS, 18 months long journey

Reading time4 min
Views1.5K


There was a custom configuration management solution.


I would like to share the story about a project. The project used to use a custom configuration management solution. Migration lasted 18 months. You can ask me 'Why?'. There are some answers below about changing processes, agreements and workflows.

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Total votes 3: ↑3 and ↓0+3
Comments2

How to test Ansible and don't go nuts

Reading time10 min
Views3.4K


It is the translation of my speech at DevOps-40 2020-03-18:


After the second commit, each code becomes legacy. It happens because the original ideas do not meet actual requirements for the system. It is not bad or good thing. It is the nature of infrastructure & agreements between people. Refactoring should align requirements & actual state. Let me call it Infrastructure as Code refactoring.

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Total votes 3: ↑3 and ↓0+3
Comments0

Holographic Principle, new type gyroscope, information without light speed limit, teleportation of physical objects…

Reading time57 min
Views12K
Warning

First, all the objects and theories described in this article have the status of hypothetical at the moment. That is, the holographic hypothesis and string theories have not been experimentally confirmed many.

Second, a fundamentally new type of mechanical gyroscope with six degrees of freedom is proposed for experimental verification (base) of hypotheses. Of the two and three degrees of freedom mechanical gyroscopes known to science, this is the last of the possible types with the maximum number of degrees of freedom in the holonomic system (GYRO_6DoF).

Third, with the advent of the experimental base — the tops of the physical pyramid, string theories, and the holographic hypothesis, which is actually the foundation of the future Theory of Everything, are temporarily removed from criticism until the moment of practical implementation of the experiment and measurements.


Abstract

Even people far from physics know that the maximum possible data transmission rate of any signal is equal to the speed of light in a vacuum. It is denoted by the letter «c», and this is about 300 thousand kilometers per second. The speed of light in a vacuum is one of the fundamental physical constants. The impossibility of achieving speeds exceeding the speed of light in three-dimensional space is a deduction from Einstein's Special Theory of Relativity (SRT). Usually, when it is argued that SRT prohibits the transmission of the information above the speed of light, an implicit assumption is made that there is no other way other than to «bind information» to a photon and transmit it. However, there is another way. The well-known physical hypothesis — the Holographic Principle (a modern and widely used tool in theoretical physics) points to an interesting phenomenon: “Phenomena taking place in three-dimensional space can be projected onto a remote screen without losing information” — Leonard Susskind “The World as a Hologram ”[p. 3].

image

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Total votes 32: ↑2 and ↓30-26
Comments127

Optimising server distribution across the racks

Reading time5 min
Views1.8K
Recently, a colleague asked me in a chat:

— Is there an article how to pack servers into the racks properly?

I realised that I'm unaware of it. So, I decided to write my text.

Firstly, this is an article about bare metal servers in the data centre (DC) facilities. Secondly, we estimate that there are a lot of servers (hundreds or thousands); the article doesn't make sense for fewer quantities. Thirdly, we consider that there are three constraints in the racks: physical space, electric power per each one, and cabinets stay in the rows adjacent to each other, so we can use a single ToR switch to connect servers in them.
The answer to the original question depends significantly...
Total votes 11: ↑10 and ↓1+9
Comments0

Most Popular Computer Problems We Are Facing Everyday

Reading time2 min
Views1.6K
In today’s contemporary world the private computer has become a staple of daily life.
Even those few persons who don't use computers in their daily work life can possibly have access to a computer on that they perform alternative necessary tasks.

With all of the access to info that computers permit and with all of the work they will facilitate a personal perform, this trend of a computer in every home and in each workplace of business isn't shocking.

But what may be shocking, and downright aggravating, is when the computer you are working on suddenly shuts off, goes blank, or explodes in the dreaded blue screen of death.

These and other common computer problems are among the most frequently occurring issues that one might experience with their computers.

The following may be a list of 5 common Computer issues and what may be done to mend them.
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Total votes 18: ↑12 and ↓6+6
Comments0

Flightradar24 — how does it work? Part 2, ADS-B protocol

Reading time9 min
Views7.5K
I’m going to have a guess and say that everyone whose friends or family have ever flown on a plane, have used Flightradar24 — a free and convenient service for tracking flights in real time.

image

In the first part the basic ideas of operation were described. Now let's go further and figure out, what data is exactly transmitting and receiving between the aircraft and a ground station. We'll also decode this data using Python.
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Total votes 12: ↑12 and ↓0+12
Comments0

Flightradar24 — how does it work?

Reading time4 min
Views122K
I’m going to hazard a guess and say that everyone whose friends or family have ever flown on a plane, have used Flightradar24 — a free and convenient service for tracking flights in real time.



But, if my friends are any indication, very few people know that the service is community-driven and is supported by a group of enthusiasts gathering and sending data. Even fewer people know that anyone can join the project — including you.

Let’s see how Flightradar and similar other services works.
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Total votes 80: ↑79 and ↓1+78
Comments12
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