Journal of Computer Sciences Institute

167-171

Authors: Katarzyna Jóźwicka, Mariusz Mitrus

The article presents the research on hybridization of methods of working with databases in JEE applications. The test applications were made based on the JDBC interface, Hibernate and Spring framework. Application performance analysis covered the execution time and RAM usage for basic CRUD operations in the database.

179-186

Authors: Marcin Łukasiak, Kamil Machul, Mateusz Maj

The study was tend to checking the possibility of using VR technology to invoke specific emotions on the subject. Literature studies have shown a high probability of obtaining successful results, but so far studies have been based on measurements obtained using specialized, expensive equipment. This study was about to show that obtaining similar results is also possible with usage of low budget solutions. Received results allow to conclude even using the less sophisticated technology, satisfactory results can be gained, which can determine the effect of the image displayed in the goggles on the emotions of the subject.

193-198

Authors: Andrii Filatov, Paweł Flis, Beata Pańczyk

The study answers the question which database is the best choice for efficient data storage of UML models. Three products were considered: MongoDB, PostgreSQL and Neo4J. The effectiveness test consists of measurement the response time of queries that save and load data. This study also take into account the memory increase ratio during data insertion and the level of complexity of the implementation of the test data mappers used in database queries.

206-213

Authors: Tomasz Machulski, Grzegorz Nowakowski, Maria Skublewska-Paszkowska

This article presents the methods of enhancing the performance and security of web applications. It also evaluates them and describes how to use them. The methods have been implemented in a test application. The article presents results of the research comparing state of the application before and after implementation of every listed method. Conclusions about impact of the methods of enhancing performance and security of web applications are based on the results of the research.

220-225

Authors: Krzysztof Mazur, Damian Mazur

The aim of the article is to compare and analyze the impact of technologies and data transfer techniques in term of displaying the image using a holographic pyramid. When assessing the usability of the solution, the following parameters will be taken into account: time of image transfer, use of physical parameters of the machine and parameters of the Java Virtual Machine.

232-239

Authors: Cezary Kryczka

This article is an attempt to answer the question whether and under what conditions it is beneficial to develop an own intelligent building system, when many free open source systems are available. The publication presents the characteristics of author's own home automation system - sHome, as well as the open-source system - Domoticz, in a configuration that is as close to the functionality of the author's system as possible. The work ends with a comparative analysis of the systems and conclusions from the analysis.

246-251

Authors: Kostiantyn Honcharenko, Jakub Smołka

The article presents the development of the Android runtime. Own application for Android is presented, which implements performance benchmarks used to test different versions of the Android runtime. The methods measure the benchmark execution times in different versions of the Android runtime environment.

258-266

Authors: Arkadiusz Bęben, Piotr Kopniak

Many home appliances available on the market are equipped with components to receive and generate data and communication modules allow connection to the Internet. As a result, the devices can be combined to smart homes systems. The analysis presents the individual capabilities of devices that can work in such systems. Presented are devices available on the market and made a smart home system working in Wi-Fi and Z-Wave networks.