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1.
Statistical analysis of the development indicators' impacts on e-commerce of individuals in selected European countries
Ksenija Dumičić, Ivana Skoko Bonić, Berislav Žmuk, 2018, original scientific article

Abstract: The aim of this paper is to analyse the influence of the development level indicators on the e-commerce, i.e. on the online purchase by individuals, in selected European countries in 2013. In the analysis, the main variable under study and all the independent variables are included as standardised. Based on nine variables, the principal component analysis with varimax rotation was performed and the two extracted factors were used as the regressors in the multiple regression analysis. In the regression model both components, Factor 1, which includes seven variables, called Prosperity, Investing in Education and IT Infrastructure, and Awareness, and Factor 2, comprised of two variables, called IT Skills, are statistically significant at the significance level of 1%. Both factors show a positive correlation with the online purchase of individuals. Inclusion and analysis of distributions and impacts of even nine independent variables, which make up two distinct factors affecting the e-commerce, make a new contribution of this work.
Keywords: e-commerce, broadband access to the Internet, factor analysis, multiple regression analysis
Published: 10.10.2018; Views: 560; Downloads: 279
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2.
Analysis of online marketing management in Czech Republik
Zdenek Smutny, 2015, original scientific article

Abstract: Background and Purpose: Doing business over the Internet has become increasingly competitive for many companies. The aim of this study is to analyse the current state of utilizing online tools, approaches of Czech companies to the management of online marketing activities and to identify weaknesses and opportunities of these activities. Methodology/Approach: The paper presents empirical research that uses two different approaches in investigation: (1) descriptive quantitative research of current state, based on examination of websites of a sample of 4,584 Czech companies and (2) questionnaire survey among 161 Czech companies which do business via the Internet. Results: There is a large gap that currently exist between the use of social media and its connection to marketing activities. The competitive level of the use of social media in the Czech Republic is still low compared to the USA companies. The online marketing management (OMM) of the majority of companies rely on individual assessment and do not use any metrics or management methodologies. One of the main problems of OMM is the ever increasing number of tools used in marketing activities as well as low possibility of a broader perspective on the success of cross channel marketing activities. Conclusion: In the future, it is expected that a large number of Czech companies will increasingly use online tools as social media for their marketing activities. In the context of this development they cannot rely only on individual assessment to manage these activities as they do currently, but they will have to use comprehensive tools or methodologies. Based on this, we can conclude that Czech companies still have enough opportunities for a better use of online tools for marketing purposes.
Keywords: online marketing, management, analysis, social media, Czech companies, Internet
Published: 28.11.2017; Views: 692; Downloads: 89
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3.
Simulations of VoIP applications in INET framework
Sebastijan Horvatić, 2017, master's thesis

Abstract: This master's thesis describes the support for modelling Voice over Internet Protocol (VoIP) applications in the INET Framework. First, it briefly presents the VoIP technology and factors responsible for the VoIP quality of service. Next, the thesis moves on to discuss the OMNeT++ environment and the INET Framework, their installation and usage. Following this, it examines all of the INET packages and modules available for VoIP modelling, with all VoIP-related INET examples then shortly described and tested. By using INET, our own network and application models are created and simulated using different parameters. Comparisons of the simulation results are carried out and some of the best-found parameters for the VoIP communications are presented. At last, the calculation of jitter by using the obtained simulation results and Excel program is described, because jitter is not shown in the simulation results in INET.
Keywords: voice over internet protocol, performance analysis, simulation, real-time transport protocol, user datagram protocol
Published: 18.08.2017; Views: 651; Downloads: 87
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4.
Analyzing information seeking and drug-safety alert response by health care professionals as ew methods for surveillance
Alison Callahan, Igor Pernek, Gregor Štiglic, Jurij Leskovec, Howard Strasberg, Nigam Haresh Shah, 2015, original scientific article

Abstract: Background: Patterns in general consumer online search logs have been used to monitor health conditions and to predict health-related activities, but the multiple contexts within which consumers perform online searches make significant associations difficult to interpret. Physician information-seeking behavior has typically been analyzed through survey-based approaches and literature reviews. Activity logs from health care professionals using online medical information resources are thus a valuable yet relatively untapped resource for large-scale medical surveillance. Objective: To analyze health care professionals% information-seeking behavior and assess the feasibility of measuring drug-safety alert response from the usage logs of an online medical information resource. Methods: Using two years (2011-2012) of usage logs from UpToDate, we measured the volume of searches related to medical conditions with significant burden in the United States, as well as the seasonal distribution of those searches. We quantified the relationship between searches and resulting page views. Using a large collection of online mainstream media articles and Web log posts we also characterized the uptake of a Food and Drug Administration (FDA) alert via changes in UpToDate search activity compared with general online media activity related to the subject of the alert. Results: Diseases and symptoms dominate UpToDate searches. Some searches result in page views of only short duration, while others consistently result in longer-than-average page views. The response to an FDA alert for Celexa, characterized by a change in UpToDate search activity, differed considerably from general online media activity. Changes in search activity appeared later and persisted longer in UpToDate logs. The volume of searches and page view durations related to Celexa before the alert also differed from those after the alert. Conclusions: Understanding the information-seeking behavior associated with online evidence sources can offer insight into the information needs of health professionals and enable large-scale medical surveillance. Our Web log mining approach has the potential to monitor responses to FDA alerts at a national level. Our findings can also inform the design and content of evidence-based medical information resources such as UpToDate
Keywords: internet log analysis, data mining, physicians, information-seeking behavior, drug safety surveillance
Published: 02.08.2017; Views: 877; Downloads: 117
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