This paper presents a mechanically verified implementation of an algorithm for deciding the equivalence of Kleene algebra terms within the Coq proof assistant. The algorithm decides equivalence of two given regular expressions through an iterated process of testing the equivalence of their partial derivatives and does not require the construction of the corresponding automata. Recent theoretica...

Kleene algebra (KA) is an algebraic system that captures properties of several important structures arising in Computer Science like automata and formal languages, among others. In this paper we present a formalization of regular languages as a KA in the Coq theorem prover. In particular, we describe the implementation of an algorithm for deciding regular expressions equivalence based on the no...

This paper analyses the quality of the school climate. One of its objectives is to defi ne such basic terms as environment, atmosphere, climate, and selected climate variants, above all the school climate. Attention is also paid to the following fi ve areas of school life, which are of signifi cance: 1) the overall attitude to school and the motivation to study; 2) teachers’ qualities and compe...


 Library collaboration originally involved between 2 (two) libraries or more regardless of whether the used computer assistance telecommunications facilities not. The research method in this study is a qualitative method. Qualitative type that aims to comprehensively understand phenomena experienced by object research, such as behavior, perceptions, motivations, actions, etc., through spe...

The aim of this work is to model the behavior verbal and nonverbal behavior of a Pedagogical Agent (PA) can be integrated into an Intelligent Tutoring System. The following research questions were posed: what is the nonverbal component of an educational communication? How to study this component for a computational model of plausible behavior of a virtual agent? What correlations between educat...

Challenges of designing an educational game cause an ongoing debate that while one side proposes ludology as the key for a computer game, other side proposes narratology as the most important part of game environment. Ludologic attributes of games have been preferred more than narrative ones. However, results of studies attempted to reveal importance of narrative structures and storytelling for...

Many factors accelerate the incidence of diabetes and hypertension, getting taller level sugar in blood, easier it is to have a stroke. Uncontrolled hypertension one most risk for stroke incidence. Health problems that cause disability death are still high, this probably due community habits difficult change, such as food drink consumption. This service method carried out by counseling through ...

background: hemophilia is a chronic bleeding disease and can interfere with daily performance of children. these children require continuous training to prevent bleeding. since children nurses play an important role in the education of sick children and their self-efficacy and the increase use of educational computer games, the use of educational games for teaching self-efficacy to children wit...