an article on the cellular structure of mobile networks, published by the "Mobile Telephony and Telecommunications" magazine (no. 28, February 1999). It is part of the MSc. dissertation "Radio Wave Propagation with Applications on Cellular Mobile Radio Systems".

• Cellular Structure of Mobile Networks
• Cellular Structure of Mobile Networks (magazine extract - Greek version)

a data analysis project, completed using "R/RStudio", designed to help discover and explore a research question, using real data and the statistical methods taught in the "Data Analysis and Statistical Inference" on-line class offered by "Coursera" (https://www.coursera.org/course/statistics | February - April 2014).

• Data Analysis and Statistical Inference

"mini-projects" in "Python", serving to reinforce the "interactive programming" concepts taught in the "Introduction to Interactive Programming in Python" on-line class offered by "Coursera" (https://www.coursera.org/course/interactivepython | September - November 2014). The course was an introduction to the basics of programming in "Python" by building simple interactive applications, and the primary method of learning was to work through multiple "mini-projects", which included building games such as "Pong", "Blackjack" and "Asteroids". Attention: the programs were developed in "CodeSkulptor" (http://www.codeskulptor.org/), a browser-based programming environment that runs "Python" programs in the browser.

• Interactive Programming in Python

a "Rails" web application developed as part of the "Ruby on Rails: An Introduction" on-line class offered by "Coursera" (https://www.coursera.org/learn/ruby-on-rails-intro | February 2016), which provides web page access to "recipe" information served by "http://food2fork.com/api" through "JSON" and images. The course explored how to build web applications with the "Ruby on Rails" framework, starting with the basics of the "Ruby" programming language and continuing with more advanced topics, such as "object oriented" programming in "Ruby" and "unit testing". Core concepts behind "Ruby on Rails", such as "CoC" (Convention Over Configuration) and "MVC" (Model-View-Controller), were introduced. The version control system "Git" was presented as well and was used to deploy the application to "Heroku".

• Ruby on Rails

web apps written in "JavaScript" for troubleshooting in the area of "SMS / SMPP" messages. They run entirely in your browser: nothing you enter or open is uploaded.

• SMS Message Analyser - encodes a message string according to the "GSM default" or "UCS2" alphabet and displays the hex data-stream representation of the encoded message. In case of a "long" SMS, it also splits the "encoded" message and presents the encoded "user data" message parts along with the proper "UDH" fields. A utility developed in 2014, while working for "Persado" as a "Connectivity" engineer.
• SMPP Traffic Analyser - loads a "pcap" / "pcapng" capture of "SMPP" over "TCP", reassembles every connection (channel) and matches each request with its response, in order to chart the request / response latency and the SMS rate and to report statistics on submitted (MT-SMS, "submit_sm"), received (MO-SMS, "deliver_sm") and delivery receipt messages, error codes, the fastest and slowest PDUs and the "SMPP" window used, per channel and for all channels combined.

an "Android" app inspired by the "Museum of Modern Art" in New York, developed as part of the "Programming Mobile Applications for Android Handheld Systems: # 1" on-line class offered by "Coursera" (https://www.coursera.org/course/androidpart1 | May - June 2015), which creates and displays a user interface, presents a menu and a dialogue, and opens a link to an external website. The course introduced the design and implementation of "Android" applications for mobile devices in "Java", discussing the "Android Platform" and the "Android Development Environment" and the basic components from which all "Android" applications are created.

• Programming Mobile Applications for Android Handheld Systems

interactive tools that run in your browser, originally developed as "Java" applets as part of the MSc. in "Telecommunication and Information Systems" course work during the 1997 - 98 academic year, which was offered by the Electronic Systems Engineering department of the University of Essex. They are now plain web pages written in "JavaScript", so no "Java" plug-in is needed any more.

• Erlang's Loss Formula - the theory behind the "Erlang B" formula and an interactive calculator of loss (blocking) probabilities.
• Statistical Analysis of Experimental Data - opens a file of X,Y observation pairs and presents the descriptive statistics, a scatter plot with a least-squares regression model (up to 5th degree), regression diagnostics and data validation. The file is processed locally in your browser.