Developers Club geek daily blog

Why in general systems of business analytics are necessary

3 years, 3 months ago

Visualization in business analytics is very important. For example, the concept of these diagrams is drawn together with Infographer.

Problem with specialized software for business analytics that it costs as the airplane — and it is necessary only when you near by have big-very big company with the corresponding data volume. In general now in the market there are not enough specialists who felt such systems, has experience with them and can tell plainly that it, why it is necessary and that will give after implementation.

The first and main application of business analytics — it is stupid to be able to build any reports while heads of divisions or board members confer in forehead. One of my favourite examples — from what plant to deliver vodka in shops: with far (expensive logistics and 2 weeks on the way), but production, cheap at cost value, or from the next (1 day), but expensive?

It is clear that it is possible to pick and answer in week. But the thicket needs faster modeling and not hundreds of separate reports, and the uniform environment where the financial specialist can simply take and obtain necessary data without involvement of all IT department. Is and still specific tasks which solve these and adjacent systems. Now I will tell.

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In pursuit for by itself, or excellent way to begin the day

3 years, 3 months ago

Transfer of post of Mariusz Jankowski "A Rat Race, or a Great Way to Start the Day".
The code given in article can be downloaded here.
I express huge gratitude to Kirill Guzenko KirillGuzenko for the help in transfer.

Not so long ago, when the winter stormed, clearing away entrance to the house from snow blockages, I have decided to remember good weather, having considered with use of Wolfram Language the bicycle route for work.

Last year I have decided to be engaged in such very widespread activity as data record of the activity. I have noted that over the past few years my trips became quicker and were given me more simply as the season came nearer to the end so it became interesting to me to make sure available similar improvements of the physical form. Using only the smartphone and the corresponding applications, I have written 27 trips between the house and work, and then used Wolfram Language for reading, the analysis and visualization of results.

Here the image about Google Earth showing my morning bicycle route having distance is slightly less than 18 km, lying from the East on the West.


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I am indignant: difference between 3D and virtual reality

3 years, 3 months ago

Training of drivers at the Chinese vendor? Sapsans?. They have taken the head car with the driver's cabin, have copied all devices and have added? look in windows? by means of 3D screens.

I am engaged in technologies of virtual reality for engineers and for training of the personnel. These are such systems where you can personally walk on oil platform or the NPP, to fulfill measures in case of accident in practice and the labor hands in gloves to twirl the Most important Valve.

And so, customers regularly confuse terminology and technologies with what they are helped very much, so to say, by not absolutely professional players of the market. I would like to clear up and once again to classify that is that. At once I will tell that after the first test of immersion system all questions disappear, but here I even approximately will not be able to transfer feeling therefore I will write words.

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48 hours of life of your publication on Habré

3 years, 4 months ago
Someone by means of Habr is advertized, someone conducts the content strategy, and someone simply shares interesting information. But all want to foreknow that will be with the published material, there will be it popular or not, whether it will be pleasant to readers. Whether it is possible to foresee how many viewings article on the first three hours of her life will receive?

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The simple plan-faktny the analysis in Power BI Designer Public Preview. Part one? consolidation and data scrubbing

3 years, 4 months ago
Today I want to tell about creation of simple dashbord about the plan-faktnym the analysis of the income and expenses in Power BI Designer Preview and Power BI. In the first part we will consider work with requests, we will learn to integrate data from several sources and to execute their cleaning.

Basic data: some Excel files in which information on indicators of the income and expenses of the company for some time is stored. As the form of reports and article of accounting several times changed, sheets with information have similar, but not absolutely identical structure. On output it is required to receive something that will allow heads to receive representation that happens to finance of the company
Let's look as Power BI Designer Preview (in the near future Power BI Desktop) will allow to integrate data and them to visualize.

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Data analysis of the world of Facebook

3 years, 4 months ago

Transfer of post of Stephen Volfram (Stephen Wolfram) of "Data Science of the Facebook World".
I express huge gratitude to Kirill Guzenko for the help in transfer.
short note about this article and the functionality of Wolfram|Alpha and Wolfram Language described in it. We provide its full translation in our blog.

Millions of people use our application "Wolfram|Alpha personal analytics for Facebook" now. And, how part of our last update, in addition to collecting some anonymous statistical data, we have started the program? donorship of data?, allowing people to share with us detail data which we use for the research purposes.

A few weeks ago we have decided to analyze all these data. And, has to tell that, it was than other, as tremendous example of force of Mathematica and Wolfram language in data science (it is also good stuff for course on data science which I have started preparing).

We were always going to use the data collected by us for improvement of our system of personal analytics. But I could not resist the attempts at the same time and consider all this from the scientific point of view.

People and their courses of life were always interesting to me. But at me it was never impossible to integrate it with my scientific interests. Up to this point. The last some weeks have passed is very fascinating in supervision of those results which we have received. One were expected, and others were so unpredictable that I never also have not assumed anything similar. And all this reminded of phenomena from my work A New Kind of Science (New type of science).

As data look? Social networks some donors of data are included below? groups of friends are broken on color (any can find own network, using Wolfram|Alpha or the SocialMediaData function in Mathematica (in the latest version of Wolfram Language this function supports work with Facebook, GooglePlus, Instagram, LinkedIn, Twitter? editor's note)).

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Interview to the Code Club project coordinator on training of children of 9-11 years in programming essentials

3 years, 4 months ago
Good afternoon, Ivan
Hello

Tell, please, that such the Code Club project with what it began who has thought up it?
Code Club — is the British initiative of training of children of 9-11 years in programming essentials. It has arisen about three years ago and since then roughly develops — at the beginning in Great Britain, and after a while and worldwide. In Great Britain already more than 2000 locations, there it everything is supported at the state level: there is base of volunteers, there is base of locations — everything is very seriously organized. After transition of boundary of 1000 locations the project has started reaching the international level. Approximately since summer of 2013 has earned the site codeclubworld.org — the same British, but task at them already more global are engaged in it: to coordinate training of children in programming worldwide, to give the chance to each child to gain knowledge of fundamentals of information science.

Then, in the summer of the 2013th year it has been declared start in the fall of the Code Club project in Ukraine. The first cities in which opening of the first locations was planned have been called and there was contact information of the coordinator. So everything began.

What is included into the program of training?
The first semester of the Code Club project tell about development of programs by means of visual programming. We teach children to work in the environment of Scratch — it is development of MIT which was created under age of 9-11 years. In the following semester of Code Club HTML, CSS and Python is studied.

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Icinga2 and agentless monitoring of the Windows servers means of WMI

3 years, 4 months ago
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Today, not everyone is happy with the used monitoring system of IT of infrastructure, and at some it simply is absent. Many of them have explicit problems with convenience of use, complexity of configuration and low productivity. For this reason, I suggest to look at new fork of Nagios — Icinga 2 which is ready to please us with modular architecture, the convenient web interface, reports generation and excellent speed of work!

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Constructed for ages: understanding of aseismic construction

3 years, 4 months ago

Transfer of post of Yu-Sung Chang "Built to Last: Understanding Earthquake Engineering".
The code given in article (with all used mathematical models), it is possible to download here.
I express huge gratitude to Kirill Guzenko for the help in transfer.

Last week the world has been shaken by news about large earthquakes and destructive tsunami in Japan. Events are still developed and can become one of the most tragic natural disasters in the contemporary history.

The scientific understanding and modeling of the difficult physical phenomena and development on the basis of this analysis are obligatory for prevention of the victims from natural disasters. In this post we investigate earthquakes from the scientific point of view to understand why they occur and as it is better to prepare for them.

Note: dynamic examples in this post have been created by means of Mathematica. Load the file of format (CDF) for interaction with models and further research of subject.

First, let's begin with locations. The following visualization is based on the American database on earthquakes of Geological Survey (USGS) which have occurred between 1973 and the beginning 2011 measuring more than 5. As it is possible to see, epicenters are concentrated in narrow areas, is normal on borders of tectonic plates. In particular, there is serious seismic activity round the Pacific Ocean, namely in "Fiery ring". It has so turned out that Japan is directly in the middle of this very active area.

Earthquake map

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The analysis of tonality of expressions in Twitter: implementation with example on R

3 years, 4 months ago
Social networks (Twitter, Facebook, LinkedIn) — perhaps, the most popular free site available to the general public for the expression of thoughts in different occasions. Millions of tweets (posts) daily — there are covered huge number of information. In particular, Twitter is widely used by the companies and ordinary people for the description of state of affairs, advance of products or services. Twitter is also fine data source for carrying out the intellectual analysis of texts: since logic of behavior, events, and finishing tonalities of expressions with prediction of trends on securities market. There the huge array of information for the intellectual and contextual analysis of texts is covered.

I will show in this article how to carry out the simple analysis of tonality of expressions. We will load twitter message on certain subject and we will compare them to database of positive and negative words. The relation of the found positive and negative words call the tonality relation. We will also create functions for finding of the most often found words. These words can give useful contextual information about public opinion and tonality of expressions. The data array for the positive and negative words expressing opinion (tone words) is taken from Hugh and Lew, KDD-2004.

Implementation on R using twitteR, dplyr, stringr, ggplot2, tm, SnowballC, qdap and wordcloud. Before application it is necessary to set and load these packets, using teams install.packages() and library().

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