Journal of Computer Sciences Institute

1-7

Authors: Katarzyna Krocz, Oleksandra Kizun, Maria Skublewska-Paszkowska

This article will compare the performance of relational databases MySQL, PostgreSQL, MariaDB and H2. The speed of executing will be tested on simple and more complex SQL queries. The tests results will show which database is more efficient.

14-18

Authors: Marek Szmit, Paweł Wojtaszko, Grzegorz Kozieł

Foreign languages learning is becoming more and more popular. A lot of people decides to start learning but in many cases some barriers exist. In small towns or villages there are no qualified teachers. This problem can be solved by remote teaching. Last time it is a popular method to make language lessons via voice communicators. Such a method should be supported by another tool to send tasks to do to students or to examine them. A portal to support learning foreign languages and to ensure communication between teacher and students was created by authors. The goal of the paper is to present its capabilities and to verify its usefulness.

26-30

Authors: Michał Pasztaleniec, Maria Skublewska-Paszkowska

The article presents a comparison of two technologies for creating desktop applications based on C#. The analysis conserns the use of the processor, RAM and time of the operation was carried out on the technologies of Windows Presentation Foundation and Windows Forms. The research use applications with the same functionality in both technologies. The comparative analysis took into account the times of operations and application performance.

37-42

Authors: Artur Całuch, Adam Cieślikowski, Małgorzata Plechawska-Wójcik

This article presents the process of adapting support vector machine model’s parameters used for studying the effect of traffic light cycle length parameter’s value on traffic quality. The survey is carried out using data collected during running simulations in author’s traffic simulator. The article shows results of searching for optimum traffic light cycle length parameter’s value.

48-54

Authors: Paweł Stręciwilk, Grzegorz Kozieł

Instant Messengers, though being around for decades, only in recent years they have managed to gain much more popularity. Today, they are the most common way of communicating, especially among young people. However, where information is being transferred there is a potential risk of it being intercepted, manipulated or disrupted. Thus, Security of Instant Messengers became a matter of high importance comprising of not only protecting the users’ sensitive information but also privacy. Also important is the awareness of the users. Are they aware of the dangers that come with directing sensitive information in this manner? Are they taking the necessary steps to shield themselves from breach attempts? This article was written to present and evaluate the awareness of IT students in the field of instant messengers security.

59-64

Authors: Roman Baida, Maksym Andriienko, Małgorzata Plechawska-Wójcik

The aim of the paper is to compare the performance of popular JavaScript frameworks Angular and Vue.js in the context of game development. The comparative criteria are as follows: time of data exchanging with server and rendering of various application components, memory consumption during refreshing the current game information and restoring the user to the current game, browser load level and size of the final application files. The test results show that the Vue.js framework is more efficient.

73-77

Authors: Krzysztof Boczkowski, Beata Pańczyk

The article analyses the performance of currently used tools for creating a SPA application interface. The study was conducted using two applications with the same functionality, implemented in React and Vue.js. The tools available in web browsers and appropriate implementations of own methods were used to measure SPA performance.

82-87

Authors: Yehor Timanovskyi, Małgorzata Plechawska-Wójcik

The article presents analysis of the performance of selected tools to build a Single Page Application. Chrome browser with DevTools tool was used to evaluate the performance of the test application. The total number of all tests was 112. As part of the study, a test application was created using different JavaScript frameworks - the Angular framework and the Vue.js framework.

94-100

Authors: Katarzyna Lachewicz

The main purpose of this article is to check which database: MySQL, MS SQL, PostgerSQL is the most efficient for Internet applications. This work contains information about the databases used, but the most important part of this article is database performance research. They are based on an application whose main task was database queries. The program was created based on new technologies, such as the Spring framework, the Hibernate library and JDBC Interface.