Ján Juhár

Towards automated assessment in game-creative programming courses

This work describes an environment supporting learning by creating computer games in programming courses. The environment consists of guidelines for student assignments (instructions for computer game creation - the key motivator). In order to submit assignments regularly, the environment is connected to Git version control system. Moreover, assignments are regularly assessed by the platform called Arena. The aim is to provide feedback as soon as possible, so there is enough space for bug fixing and personal improvement. In addition to ongoing assessment, Arena provides a web interface for writing code and displaying test results immediately, which is used mainly during exams. The main contribution is believed to be an increase of student motivation, enhancement of student engagement and effectiveness of assessment process, so it is fast and fair.

A review of source code projections in integrated development environments

The term Projectional editor is commonly used for tools that can work directly with the programs abstract syntax tree. They are able to provide different views of the program, according to the specific editor used. The ability to look at the program from multiple views is often requested as a mean to simplify program comprehension. During their evolution, the Integrated Development Environments were equipped with tools that provide such possibilities. Many of them already work with the parsed abstract syntax tree of the code and thus can be considered for projections. In this paper we review projections available in 6 widely used IDEs. The review categorizes existing projections and shows that significant number of IDE tools depend on the knowledge of program structure, but also that data from other integrated tools are used to enhance the projections.

Web application of the SLAmeter tool

This paper provides an overview of recent development of a web application of the SLAmeter tool. The SLAmeter is a computer network traffic measuring and monitoring tool that provides various informations from collected data via its web application. Due to several performance and extensibility related problems with the former solution of the web application, the whole architecture of this top layer had to be redesigned. The main focus was therefore aimed at the new design and implementation of a thick client architecture. The achieved solution resulted in several advantages: (i) it helped to decrease the response time of the user interface, (ii) introduced new features, and (iii) enabled consistent development of new modules.

Reduction of IP flow information in network traffic monitoring systems

This paper deals with the design, implementation and evaluation of a method for the reduction of IP flow information. The aim of this method is to decrease the utilization of the measuring tools based on the IPFIX protocol. The designed method was implemented in the MyBeem component of the SLAmeter network traffic monitoring tool, which is used for measuring various network traffic characteristics. This method uses the values of the IP flow keys for decreasing the load of the monitoring system by reducing the number of flows sent from the Exporter(s) to the Collector(s). This technique focuses on aggregation by which the number of flows generated by the metering process is controlled. The main contribution of this paper is an IP flow information data reduction technique.

Preliminary evaluation of the multimodal interactive system for NAO robot

The proposed paper brings a description of the pilot version of the multimodal dialogue system for NAO humanoid robot. Designed system enables multimodal interaction with the user in such manner that it takes a speech input from the user and it answers by a combination of synthetic speech and gestures. The core of the system is an external dialogue manager, which interprets VoiceXML language. A pilot speech communication application was designed and a preliminary evaluation was performed using subjective methods. Results of the preliminary evaluation highlights importance of involving gestures into communication exchange. Moreover the paper brings a discussion of usage scenarios, where designed system can be used for educational purposes.

Dialogue models for conversations in Slovak language

Proposed paper describes prepared corpora and the process of training and testing of statistical models of the human-human dialogue interaction. Such dialogue models can be used to model and manage human-human and human-machine dialogue interactions. Two databases of dialogues in Slovak language were prepared to provide data for training and testing. Statistical dialogue models were trained in the similar procedure as statistical language models (n-grams) used to be prepared. Several types of n-grams were trained for both - DiaCoSk and CallConv corpora. Because developed databases contain dialogues from different domains and conditions, their comparison were performed and observed differences were analyzed and discussed.

Understanding source code through projectional editor

The purpose of this paper is to give a report of an observational study involving program comprehension with the projectional editor that enables custom views of the source code. We briefly discuss the issues of program comprehension and motives behind projectional code editing. We also give an overview of two projectional editors focused on concern location and compare their features and use cases. The Code Bubbles editor is evaluated in an observational study observing the process of a source code comprehension. The study suggests the benefits of code projections even for large, unknown code base.