Marinka Zitnik

Fusing bits and DNA

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Sniffit

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Sniffit is simple network packet analyzer, which I implemented in C using libpcap library.

Here is very short presentation, with list of functional requirements which Sniffit supports.

Presentation.

Last Updated on Wednesday, 30 January 2013 23:40
 

EuroSkills Informatics 2010

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Just today I returned from the Portugal, Lisbon, where Euroskills 2010 has been held. In the Office ICT Category (Informatics) I won two silver medals, one as a Project Manager of the team and second together with Slovenian team (members: me, Slavko Zitnik, Miha Longino, Peter Virant).

The contest was organized very well, we were accomodated in the part of the Lisbon, where Expo was held, and there was also the competition. In fifty trades there were 500 competitors and a few hundred of experts, observers and guests.

Competitors in Office ICT Category.

 

Slovenian team in informatics (Marinka, Peter, Slavko, Miha) with team leader.

President of RS

Sprejemi tekmovalcev:

 

Last Updated on Wednesday, 30 January 2013 23:41
 

ES 2010 is Here

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Tomorrow we are going to Lisbona,Portugal, to EuroSkills 2010, category Informatics.

Details of our task at competition will be revealed after it.

Some news on the contest will be published daily by rtvslo.si.

The contest in our category is scheduled from 9.12.2010 to 11.12.2010.

Some of the interviews with our team members published in the news:

 

Last Updated on Wednesday, 30 January 2013 23:40
 

XML DB

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I have prepared presentation on XML DBs, which I will hold tomorrow, on 1st December 2010 at Basics of Database Systems course.

XQuery Examples.

Last Updated on Wednesday, 30 January 2013 23:38
 

ES 2010 Preparations

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When I started writing this article, the countdown said: ES 2010 in 17 days 0 hours 9 minutes, and 4 seconds.

Since September we (the team of four) have actively devoted ourselves to the Office ICT Test Project, draft of the project which we will have to implement in Lisbona. The project has progressed well, we gain some expertise in vast majority (if not all, we will see, depends on the final version of TP, which will be known not before as at the beginning of the compettion) of the features. Basically the task is to set up the entire ICT system of fictive international corporation from functional and network design (IPv4, IPv6, NATv6, DHCPv6, security measures, OSPF & EIGRP routing, routing destribution, dynamic VLANs, network authentication with RADIUS, wifi etc.) to common bussines services (VPN, mail, DA, AD, DNS, DHCP, VoIP Asterisk, AAA, MDT, WSUS, SNMP Nagios, virtualization etc.) and company's portfolio, documentation maintenance, cost and time management etc.

Some photos of our preparations are available at our team member's blog.

Last Updated on Wednesday, 30 January 2013 23:38
 

Embedded Business Intelligence in SP 2010

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It has been a while since SP 2010 has been released and since I have been developing quite a lot on SP 2007 and am now exploring 2010 version, I feel moral duty :) to write something about this latest version as well. So I decided to write something about embedded business intelligence, which is not mentioned very often but I think it will become one of the integral part of SP.

First of all, embedded BI is a result of incorporation of the Performance Point Server as Performance Point Services. Before SP 2010, Performance Point Server was independant and separate product but now it isn't anymore. New Services enrich SP with KPI indices, scorecarding, matrices and much more that can easily be rendered as dashboards, charting webparts or consumed through Visio Services or used by numerous improvements to Excel Services.

Together with Performance Point Services, you get a Dashboard Designer, with which is possible to gui interface or hook up the data you you want to drive your scorecard or KPI off (e.g. conect it to SQL Service Anaylsis, easily create KPIs in designer and render them as webparts in sharepoint). As data mining and OLAP are getting more and more important BI technologies it is necessary to stress their benefits. First you are in control of what is happening with the data you have: data sources can be configured by admins  nd dashboards by department business units. Furthermore it is very easy to slice and dice the data to get the answers you are looking for. One among numerous new features is the decomposition tree -  we can drill into key notes and get more details in a very visual graphical way, which enriches the models from which we pull the data, so users can get quality answers quickly.

Few improvements are included in the Excel Services allowing users to publish and share bits of or whole workbooks, but still the owner has the total control of the services users consume.

There is another novelty worth mentioning, namely the Visio Services. It is simply a matter of creating a graph (e.g. network diagram or graph of used resources on the project) that is data bound and which then checkis real present data (e.g. changing pictures or states in accordance with the progress of the project). It is more of creating a simple user-friendly workflow that updates itself than a diagram. Do not confuse this with another powerful tool WWF - Windows Workflow Foundation to create complex workflows in .NET and VS.

Last Updated on Wednesday, 30 January 2013 23:37
 

Mandelbrot Set & R Language

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I've been following a course on Statistical Aspects of Data Mining lately, which is not what I will write about, but this article got inspiration from it. The software environment being used in this course is the R programming language, which is used for statistical computing and graphics (it is available for Windows, Linux and Mac as part of the GNU project). If you download it from R's website, you get it with the command line interpreter, of course there are some IDEs as well, such as Rcmdr or Tinn-R. The capabilities of R are extended with numerous user-submitted packages - for the animation of the Mandelbrot Set at least the following libraries are needed: spam, fields, bitops, caTools - all are freely available at R's website. The R is influenced by S and Scheme, but I'wont go into details, as there is plenty information about it on the web.

I tried to draw the classic Mandelbrot Set (the basic code for it is available here), which is just iterating through the formula, z=z^2+c, where c is a complex parameter, starting at z=0 . The Mandelbrot Set is defined as set of all points, such that the sequence, got by iteration, does not escape to infinity. Some of the set's properties are: local connectivity, self-similarity, correspondence with the structure of Julia Set etc. Very simple formula, which gives fascinating results. In the R language animation you can observe the main cardioid, period bulbs, hyperbolic components.

Classic Mandelbrot Set

Last Updated on Wednesday, 30 January 2013 23:42
 

Hello

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Helicoid (from mathematics) is the minimal surface having helix as its boundary, which is a curve for which the tangent makes a constant angle with a fixed line. Helicoid is after the plane and the catenoid the third known minimal surface. For every point on the helicoid there is a helix contained in the helicoid which passes through that point.

Last Updated on Sunday, 05 July 2015 09:34
 


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