Dániel Varga

Hunmorph: Open Source Word Analysis

Common tasks involving orthographic words include spellchecking, stemming, morphological analysis, and morphological synthesis. To enable significant reuse of the language-specific resources across all such tasks, we have extended the functionality of the open source spellchecker MySpell, yielding a generic word analysis library, the runtime layer of the hunmorph toolkit. We added an offline resource management component, hunlex, which complements the efficiency of our runtime layer with a high-level description language and a configurable precompiler.

Web-based frequency dictionaries for medium density languages

Frequency dictionaries play an important role both in psycholinguistic experiment design and in language technology. The paper describes a new, freely available, web-based frequency dictionary of Hungarian that is being used for both purposes, and the language-independent techniques used for creating it.

The RobonAUT Autonomous Mobile Robot Construction Contest

Abstract This paper presents the RobonAUT contest organized by the Budapest University of Technology and Economics, Department of Automation and Applied Informatics. The contest aims to support the education of control theory, embedded system design and several other courses related to building autonomous mobile robots in a fun and instructive teamwork project. Students are required to build autonomous four-wheel robots capable to go along a path indicated by a continuous line on the ground, and to perform several tasks along the way. These tasks involve obstacle avoidance, parking operations, passing slopes, and acceleration segments. 3 students work together in a team during the semester to build their robot, for which they need skills related to control theory, both analog and digital circuit design, and microcontroller programming. The task has a very strong integrating nature by utilizing the material of several courses of electrical engineering. Beside the motivating fact that building an own robot is fun, we believe that students are given the opportunity to apply their knowledge to solve a real-world engineering task. And based on the popularity of the challenge, students seem to realize the need for this practice as well. This paper is aimed to describe the history, rules and experiences of the challenges in 2010 and 2011, together with the plans of the 2012 challenge.

Problems of improving the efficiency of parsing systems

Ae soon as practical applications are coneidered the efficiency of the parsing method is of fundamental importance whether natural or programming languagee are to be proceesed. The problem of efficiency arises because the relationship between the length of e string of symbols and the number of structures that may in theory be assigned to the string is far from linear, the growing number of symbols entails a much more rapidly growing number of possible structures. For CF ~ s it is comparatively easy to determine how the number of structures depends on the length of the string. Considering binary branchings only and excluding the possibilities that arise from having different labels attached to one node

The RobonAUT robot construction contest in 2013

Abstract This paper presents the robot constructing contest called RobonAUT, where teams of three have to design and compete against each other using their robot. During the course of the contest students can learn how to do the mechanics, electronics and programming of an autonomous mobile robot. The event takes place on two fields. The first is a field where robots have to complete certain stager in less than five minutes to score. On the second field speed is essential and the units have to speed up to score. They have to detect different obstacles with sensor systems that teams connected to a certain type of robot kit. In 2013 the field got more difficult obstacles, like the finish, which was a horizontal surface, but now it is a slope where robots have to stop. Obstacle avoidance is the other obstacle where one side of the object is corded and the other is smooth, the robot have to detect the pattern on the wall.

Team organization and participation in the Eurobot 2012 contest

Abstract Eurobot is an international competition where autonomous robots are competing against each other. This contest is organized in every year since 1998. This article introduces the electrical and mechanical designing steps of an autonomous robot, which was constructed for the contest. Additionally upgraded parts of the electrical system compared to previous years are also presented in this paper. We go into details about the positioning system, which includes absolute and relative positioning methods, and we analyze the development opportunities of them. The introduction of the hardware and software architecture, navigation algorithm are also part of this article. We focus on the designing experiences and development opportunities of the system.

Syntactic analysis in the case of highly inflecting languages

The paper discusses the two main methods based on the dependency grammars and on PS grammars used in syntactic analysis of natural languages. In the case of highly inflecting languages the PS analysis has the main disadvantage that they considered syntactically homogeneous categories the number of rules to be applied increases rapidly. The paper proposes the method of partial decomposition into morphemes in order to increase the efficiency of the rewriting rules, so that the problems of rection and agreement can be solved for highly inflecting languages.