Generalized Problematic Internet Use Scale 2: Results of Validation on Polish Sample

This study aims to adapt the Problematic Internet Use Scale. The scale of Generalized Problematic Internet Use is an important tool for measuring the intensity of the problem. Widely used in English, Portuguese or Italian, it indicates the importance of the obtained result. Validation of the Polish group will allow to use it in Polish conditions. In order to validate the results, the 523 (516 after data cleaning) group of Internet users was surveyed. The study covered people of Polish origin aged 18-47, 304 women and 212 men. The original tool was translated two times, into Polish and then into English by independent translators. There were conducted Exploratory Factor Analysis that showed five-factor structure, which explained 73.9% of variance; chi 2 /df = 1.21; Confirmatory Factor Analysis showed good fitness of proposed model, chi 2 /df = 1.66, RMSEA = 0.035 and reliability measured by Cronbach alpha was 0.89. The obtained results indicate satisfactory psychometric values of the Polish version of Generalized Problematic Internet Use Scale 2. The conducted validation may contribute to a wider application in the Polish group, also in further research and constitute an important tool for scientific purpose s. Due to the theoretical background of the Problematic Use of the Internet, the adapted questionnaire can be used as well for preventive actions

Emotion detection based on sentiment analysis : an example of a social robots on short and long texts conversation

PURPOSE: The aim of this paper is to present a solution to detect emotions from text obtained in a conversation with a social robot. Emotions will be detected using sentiment analysis based on the English and Polish lexicon.DESIGN/METHODOLOGY/APPROACH: Data from social robot conversation records will be converted into text and then split into short and long speech. The original language utterances will then be analysed using the Polish lexicon, while the translated texts will be analysed using the English emotional lexicon.FINDINGS: The results obtained indicate the same or similar distribution of emotions made by sentiment analysis using both plNetWord and NRC lexicons.PRACTICAL IMPLICATIONS: The results obtained can be used for further research addressing the creation and development of lexicons based on the selected language. They are also applicable to the implementation of solutions for detecting and responding to conversational emotions by social robots.ORIGINALITY/VALUE: The analyses so far mostly take up the subject of textual analysis in English. The aim of the present study is to analyse a Polish text and to compare the results obtained with those for English texts. The analysis of differences in the emotional sentiment of utterances may lead to the construction of more effective models based on the chosen language.This publication was supported under the Initiative of Excellence— Research University program implemented at the Silesian University of Technology, 2020– 2022peer-reviewe

Application of safety and communication modules as an integrated intelligent system in rail vehicles

This paper presents of Integrated System of Supporting Information Management in Passenger Traffic (the polish acronym of the system is ZSIKRP Demonstrator+). Currently on the polish and, as far as we know, international market such integrated solution is not developed and proposed. In this concept the final customer, e.g. the manufacturer or carrier company, will install one complete solution instead of multiple different installations that are usually difficult or even impossible to integrate. In our opinion the integration leads to increase in safety level of public transport and to improvement the quality of services offered. The novelty of the system is to provide collision, threats detection and fire alarm system integrated into a single coherent solution. In the collision detection module there is a need to apply devices that are resistant to physical disturbances, such as vibrations or strong fluctuations in temperature. One can either use the sensors made in MEMS technology (Micro-called Electro-Mechanical-Systems or micro-electromechanical) or other solutions made in the form of a monolithic integrated system in a standardized enclosure adopted to SMD mounting standard. A practical example of such a sensor is a new digital accelerometers that have a large measurement range (from ±120 g to ±480 g), and the choice of communication. The implementation of the collision detection module based on a monolithic integrated systems in MEMS technology

Passenger safety and information module in intelligent integrated traffic management system

The article presents selected components of the prototype of the integrated system of supporting information management in passenger traffic (the polish acronym of the system is ZSIKRP Demonstrator+). The system is equipped with significantly expanded range of offered functionality, which corresponds to the current demands of the market. Additionally, it has features distinguishing it from other products available on the market. Prototypes of the system installed in two versions: for electric (EZT) vehicle (EN57 1756 – type in Mazovia Railways) and diesel (SZT) (SA 132 006 – type in regional public transport) vehicle. ZSIKRP system also focuses on ensuring the safety of travelers in both types of vehicles: EN57 1756 (EZT) and SA 132 006 (SZT). It is done by installation of the collision and threats detection module, thus it will be possible to transfer information about possible emergency situation to supervision center and immediately to crisis management center. Particular attention has been given to test collision and threats detection module and stabilization of measurements

Financial sentiment on Twitter's community and it's connection to Polish stock market movements in context of behavior modelling

PURPOSE: The paper analyzes the relationship between tweets published on social media related to the stock market and stock market movements. The research conducted aims to find patterns that may account for behavioral modelling patterns between social media and the stock market.DESIGN/METHODOLOGY/APPROACH: To conduct the research, 452,776 tweets containing a hashtag with the name of at least one company included in the WIG20 of the Polish stock market were analyzed. The data obtained also included information about the reach of the tweet and the popularity of the author. The analyzed text also contained a timestamp allowing the tweets to be linked to the behavior of the stock market. Additionally, the analysis implemented developed Polish financial sentiment analysis vocabularies allowing for better pattern retrieval.FINDINGS: The obtained results indicate that among the analyzed data, three patterns related to the sentiment of statements accompanying a given company in social media can be distinguished. A consistent sentiment present in many statements with a wide range is decisive. When different sentiments are present, the presence of a pattern is not identifiable. The implementation of Polish financial dictionaries allowed to distinguish also individual words characterizing positive and negative sentiment.PRACTICAL IMPLICATIONS: The results obtained can form the basis for further, more in-depth analyses between sentiment published in social media and stock market movements.ORIGINALITY/VALUE: Studies analyzing the relationship between the analysis of tweets and stock markets are conducted but analyses related to the Polish stock market are not a popular field of analysis. Due to the unique nature of each stock exchange, it is indicated to be innovative and to be able to emerge some patterns, useful in the context of investing.peer-reviewe

Chemically homogenous compounds with antagonistic properties at all α1\alpha_{1}-adrenoceptor subtypes but not β1\beta_{1}-adrenoceptor attenuate adrenaline-induced arrhythmia in rats

Studies proved that among all α1-adrenoceptors, cardiac myocytes functionally express only α1A- and α1B-subtype. Scientists indicated that α1A-subtype blockade might be beneficial in restoring normal heart rhythm. Therefore, we aimed to determine the role of α1-adrenoceptors subtypes (i.e. α1A and α1B) in antiarrhythmic effect of six structurally similar derivatives of 2-methoxyphenylpiperazine. We compared the activity of studied compounds with carvedilol, which is β1- and α1-adrenoceptors blocker with antioxidant properties.To evaluate the affinity for adrenergic receptors, we used radioligand methods. We investigated selectivity at α1-adrenoceptors subtypes using functional bioassays. We tested antiarrhythmic activity in adrenaline-induced (20 µg/kg i.v.), calcium chloride-induced (140 and 25 mg/kg i.v.) and barium chloride-induced (32 and 10 mg/kg i.v.) arrhythmia models in rats. We also evaluated the influence of studied compounds on blood pressure in rats, as well as lipid peroxidation. All studied compounds showed high affinity towards α1-adrenoceptors but no affinity for β1 receptors. Biofunctional studies revealed that the tested compounds blocked α1A- stronger than α1B-adrenoceptors, but except for HBK-19 they antagonized α1A-adrenoceptor weaker than α1D-subtype. HBK-19 showed the greatest difference in pA2 values - it blocked α1A-adrenoceptors around sevenfold stronger than α1B subtype. All compounds showed prophylactic antiarrhythmic properties in adrenaline-induced arrhythmia, but only the activity of HBK-16, HBK-17, HBK-18 and HBK-19 (ED50=0.18-0.21) was comparable to that of carvedilol (ED50=0.36). All compounds reduced mortality in adrenaline-induced arrhythmia. HBK-16, HBK-17, HBK-18 and HBK-19 showed therapeutic antiarrhythmic properties in adrenaline-induced arrhythmia. None of the compounds showed activity in calcium chloride- or barium chloride-induced arrhythmias. HBK-16, HBK-17, HBK-18 and HBK-19 decreased heart rhythm at ED84. All compounds significantly lowered blood pressure in normotensive rats. HBK-18 showed the strongest hypotensive properties (the lowest active dose: 0.01 mg/kg). HBK-19 was the only compound in the group, which did not show hypotensive effect at antiarrhythmic doses. HBK-16, HBK-17, HBK-18, HBK-19 showed weak antioxidant properties.Our results indicate that the studied 2-methoxyphenylpiperazine derivatives that possessed stronger α1A-adrenolytic properties (i.e. HBK-16, HBK-17, HBK-18 and HBK-19) were the most compounds in adrenaline-induced arrhythmia. Thus, we suggest that the potent blockade of α1A-receptor subtype is essential to attenuate adrenaline-induced arrhythmia

Antidepressant- and anxiolytic-like effects of new dual 5-HT_{1A} and 5-HT_{7} antagonists in animal models

The aim of this study was to further characterize pharmacological properties of two phenylpiperazine derivatives: 1-{2-[2-(2,6-dimethlphenoxy)ethoxy]ethyl}-4-(2-methoxyphenyl)piperazynine hydrochloride (HBK-14) and 2-[2-(2-chloro-6-methylphenoxy)ethoxy]ethyl-4-(2- methoxyphenyl)piperazynine dihydrochloride (HBK-15) in radioligand binding and functional in vitro assays as well as in vivo models. Antidepressant-like properties were investigated in the forced swim test (FST) in mice and rats. Anxiolytic-like activity was evaluated in the four-plate test in mice and elevated plus maze test (EPM) in rats. Imipramine and escitalopram were used as reference drugs in the FST, and diazepam was used as a standard anxiolytic drug in animal models of anxiety. Our results indicate that HBK-14 and HBK-15 possess high or moderate affinity for serotonergic 5-HT2, adrenergic α1, and dopaminergic D2 receptors as well as being full 5-HT1A and 5-HT7 receptor antagonists. We also present their potent antidepressant-like activity (HBK-14-FST mice: 2.5 and 5 mg/kg; FST rats: 5 mg/kg) and (HBK-15-FST mice: 1.25, 2.5 and 5 mg/kg; FST rats: 1.25 and 2.5 mg/kg). We show that HBK-14 (four-plate test: 2.5 and 5 mg/kg; EPM: 2.5 mg/kg) and HBK-15 (four-plate test: 2.5 and 5 mg/kg; EPM: 5 mg/kg) possess anxiolytic-like properties. Among the two, HBK-15 has stronger antidepressant-like properties, and HBK-14 displays greater anxiolytic-like activity. Lastly, we demonstrate the involvement of serotonergic system, particularly 5-HT1A receptor, in the antidepressant- and anxiolytic-like actions of investigated compounds

HBK-17, a 5-HT1A Receptor Ligand With Anxiolytic-Like Activity, Preferentially Activates ß-Arrestin Signaling

Numerous studies have proven that both stimulation and blockade of 5-HT1A and the blockade of 5-HT7 receptors might cause the anxiolytic-like effects. Biased agonists selectively activate specific signaling pathways. Therefore, they might offer novel treatment strategies. In this study, we investigated the anxiolytic-like activity, as well as the possible mechanism of action of 1-[(2,5-dimethylphenoxy)propyl]-4-(2-methoxyphenyl)piperazine hydrochloride (HBK-17). In our previous experiments, HBK-17 showed high affinity for 5-HT1A and 5-HT7 receptors and antidepressant-like properties. We performed the four plate test and the elevated plus maze test to determine anxiolytic-like activity. Toward a better understanding of the pharmacological properties of HBK-17 we used various functional assays to determine its intrinsic activity at 5-HT1A, 5-HT2A, 5-HT7, and D2 receptors and UHPLC-MS/MS method to evaluate its pharmacokinetic profile. We observed the anxiolytic-like activity of HBK-17 in both behavioral tests and the effect was reversed by the pretreatment with WAY-100635, which proves that 5-HT1A receptor activation was essential for the anxiolytic-like effect. Moreover, the compound moderately antagonized D2, weakly 5-HT7 and very weakly 5-HT2A receptors. We demonstrated that HBK-17 preferentially activated ß-arrestin signaling after binding to the 5-HT1A receptor. HBK-17 was rapidly absorbed after intraperitoneal administration and had a half-life of about 150 min. HBK-17 slightly penetrated the peripheral compartment and showed bioavailability of approximately 45%. The unique pharmacological profile of HBK-17 encourages further experiments to understand its mechanism of action fully

Adaptive Learning and Personalizing Learning – Models and Tools

Increased availability and change of ways of obtaining and processing information about the world through the use of modern technologies give the opportunity to change the teaching paradigm. The modernization and modification of teaching are directed towards the adjustment of the method and content of teaching, which would take into account the student / trainee’s resources in the context of their needs. On the basis of these assumptions, the concepts of adaptive and personalized learning were distinguished. The aim of the article is to review the models and tools used in both the aforementioned teaching methods and indicating the areas of their application

Implications of the COVID-19 Pandemic for the Waste Management Market

Celem pracy jest analiza potencjalnego wpływu pandemii COVID-19 na funkcjonowanie rynku gospodarowania odpadami. Aby było to możliwe przeprowadzono przegląd literatury dający podstawy teoretyczne do zrozumienia pandemii i konstrukcji rynku recyklingowego, a także koncepcji mogących usprawnić działanie przedsiębiorstw tego rynku. Studium przypadku przedsiębiorstwa KOM-EKO S.A. pozwoliło na uzyskanie wniosku, iż pandemia COVID-19 nie wpłynęła negatywnie na funkcjonowanie organizacji w dłuższej perspektywie, jedynie wywołała chwilowy szok, który skutkował tymczasowymi komplikacjami. Wyniki badań wskazują na odporność rynku recyklingowego w obliczu kryzysu zdrowia. Zaproponowano także działania zgodne z przedstawionymi koncepcjami, które mogą zostać w przyszłości zaimplementowane do podmiotów rynku gospodarowania odpadami.The aim of the paper is to analyze the potential impact of the COVID-19 pandemic on the functioning of waste management market. To make it possible, a literature review was conducted, providing theoretical background for understanding the pandemic and construction of the recycling market, as well as concepts that can improve functioning of companies in such market. Case study of KOM-EKO S.A. led to the conclusion that the COVID-19 pandemic did not have a negative impact on the organization in the long term, but only cause a temporary shock that caused temporary complications. Research result show the resilience of the recycling market in the face of health crisis. Actions were also proposed in accordance with the presented concepts, which may be implemented in the future to entities of the waste management market