We study nitrogen lasers - part 2. Longitudinal discharge lasers

We study nitrogen lasers - part 2. Longitudinal discharge lasersIn the last part of We looked at examples of home-made and factory designs of nitrogen lasers with a transverse discharge, and it was this topology that became the most popular for replicating home-craftsmen. And here are its advantages:
 
 
 
Simplicity. As mentioned above, in many cases even the design of an improvised simplest nitrogen laser operating in atmospheric air is fully applicable, even with quite serious scientific work in the laboratory. 3r388.  
A rather serious output pulse energy is tens of millijoules at large installations. 3r388.  
A very short pulse duration, in some ...
+ 0 -

Difficult development of simple devices

 3r3181. 3r3-31. Greetings reader! Today I will tell you a funny story that made me think about the problems that arise when choosing the right components for the implementation of an electronic product that is not (optimally). And also about the seeming simplicity on the example of the “one day” device.
 3r3181.
 3r3181.
Difficult development of simple devices 3r33177.
3r3334.
 3r3181. We agree that the story is fictional, any coincidences are random or not random.
 3r3181. Once Seryozha, a programmer, approached me with a request to make a device for him in the car that emulates the sequential pressing of 2 virtual buttons when pressing one ...
+ 0 -

SamsPcbGuide, part 8: How to get the correct waveform

SamsPcbGuide, part 8: How to get the correct waveformProbably everyone knows how to use the oscilloscope. It is very easy - you hook the crocodile to the ground, the tip of the probe to the required measurement point, adjust the scale along the vertical and horizontal axes and get a temporary unfolding of the voltage at that point. Yes, this can be done, but only if we take into account a number of factors that will be discussed in this article. And if you do not take into account, then there is a chance that the image obtained on the oscilloscope screen is a useless picture. And the lower its cost, the more likely it is.
3r-33199. 3r3195.  
3r3195...
+ 0 -

News from the world of OpenStreetMap №437 (11/27/2018-???)

 3r33395. 3r3-31.
News from the world of OpenStreetMap №437 (11/27/2018-???)
 3r33395.
Mobile Calibration Object 1 | Kanton Zürich, Baudirektion, Amt für Raumentwicklung
 3r33395. 3r3323. Maps
 3r33395.
 3r33395. 3r33333. Reference OpenStreetBrowser now has a new category in the section “Leisure, sports and shopping” (Leisure, Sport and Shopping). According to r3r322. 3r3r7777 blog post. The new category “Swimming and Bathing” includes all types of swimming and bath facilities and saunas.
 3r33395. 3r33333.
 3r33395. diary. .
 3r33395. 3r33333.
 3r33395. 3r3323. Mapping 3r3325.
 3r33395.
 3r33395. 3r...
+ 0 -

Do-it-yourself snowflakes in the StarWars style (upd. 2018)

Do-it-yourself snowflakes in the StarWars style (upd. 2018) 3r33333. 3r33333.  
A long time ago in a galaxy far, far away
And here again the end of the year has come December You think Antonio Herrera decided to please us with new patterns of snowflakes, made in the style of StarWars? And you are absolutely right. Last year, Antonio made just two patterns with 3r315. Porgs 3r316. (by the way, they also entered this year's compilation). 3r33333.  
Download PDF 3r33333. 3r3194...
+ 0 -

The questions are not a boy, but a juna. 22 questions to the employer at the interview for the position of "Middle Python-developer"

 
3r3-31. The questions are not a boy, but a juna. 22 questions to the employer at the interview for the position of "Middle Python-developer" 3r33333.  
3r33333.  
3r33333. Introduction
3r33333.  
For 2 years I was lucky to visit more than forty interviews as a candidate for the position of "Middle Python-developer". In the last fifteen interviews, I realized the need to ask questions to the employer in order not to encounter any surprises in the future. In addition to the basic questions that candidates usually ask employers, I decided to form my own questions. When I asked these questions at the interviews, I received a variety of reactions from the interviewees. Someone said that I was meticulous, someone thought these questions ...
+ 0 -

Complicating the standard example

The standard C ++ library offers not only a set of classes, but also determines the way programs are written. This article discusses the general requirements for implementing programs using STL.
 3r33333.
 3r33333. Consider the following problem:
 3r33333. 3r388. Read from the file input.txt array of integers separated by whitespace. Sort them and write to the file output.txt
 3r33333. 3r314. 3r33357. You can write the following solution:
 3r33333.
 3r33333.
#include
3r33333. #include copy]leaf iterators. ;
 3r33333. 3r33333. The inserter function inserts the value into the container before ...
+ 0 -

The choice of architecture solutions for the marketplace of freight services

 3r3176. 3r3-31. 3r3-33160.
Agorafreight.com is the first service in Russia for online pricing and ordering of air, road and container transport, general cargo by all modes of transport, including door-to-door rates. 3r3162.  3r3176.
3r3161. 3r3162.  3r3176. The choice of architecture solutions for the marketplace of freight services 3r3162.  3r3176. 3r3-33160. The history of the project Agorafreight tells the project manager Reksoft (part of the GC "Technoserv") Dmitry Dolgikh. 3r3161. 3r3162.  3r3176. 3r3-33160. Russian startup Agorafreight is a marketplace for international cargo transportation, which is designed to calculate the cost of freight services provided by forwarding ...
+ 0 -

Can train with reinforcements agent for trading in the stock market? Implementation in the language of R

Can train with reinforcements agent for trading in the stock market? Implementation in the language of R 3r33737. 3r3-31. Let's create a prototype learning agent with reinforcements (RL) that will master the skill of trading.
 3r33737.
 3r33737. Given that the implementation of the prototype works in the R language, I urge R users and programmers to come closer to the ideas presented in this material.
 3r33737.
 3r33737. This is a translation of my English article: Can Reinforcement Learning Trade Stock? Implementation in R.
 3r33737.
 3r33737. I want to warn code hunters that in this note there is only a neural network code adapted for R.
 3r33737.
 3r33737. If I did not distinguish ...
+ 0 -

Docker Remote API with certificate authentication with revocation checking

Problem Description
 
For the needs of remote control of Docker, Docker can provide web API.
 
This API can either not require authentication at all (which is highly discouraged), or use certificate authentication.
 
The problem is that native certificate authentication does not provide for certificate revocation checking. And this can have serious consequences.
 
I want to tell how I solved this problem.
3r318.
 
Solution of the problem 3r3203.
 
First you need to say what to say, I will be about Docker for Windows. Maybe Linux is not so bad, but now is not about that.
 
What we have? We have ...
.NET / C# / DevOps
+ 0 -