This thesis explores possible solutions to replace Adobe Flash Player by using tools already built into modern web browsers, and explores the tradeoffs between bitrate, quality, and delay when using an adaptive bitrate for live streamed video. Using an adaptive bitrate for streamed video was found to reduce stalls in playback for the client by adapting to the available bandwidth. A newer codec can further compress the video file size while maintaining the same video quality. This can improve the viewing experience for clients on a restricted or a congested network. The tests conducted in this thesis show that producing an adaptive bitrate stream and changing codecs is a very CPU intensive process.

This thesis analyzes a continuity between the changes of the exchange rates of the cryptocurrencies and the dynamics of the created content on the Internet by their users. The main goals of this thesis are to analyze unstructured data focusing on the development of the topics for different cryptocurrencies and to interconnect the key topics with the changes of the exchange rates of this cryptocurrencies. In order to successfully obtain goals I describe process and methods of the analysis unstructured data, explain the issues of the cryptocurrencies, identify a source of the downloading data and choose some cryptocurrencies for subsequent analysis. The contribution of this thesis is the identification of the development key topics in the chosen source, finding topics, which are the most under discussion about the chosen five cryptocurrencies. Also this thesis detects the existence of the reaction of the users to the changes of exchange rates of the chosen cryptocurrencies and describes it. Particular contribution of this thesis is a practical demonstration of the application the elected technology for analyzing unstructured data. Also additional contribution is the methods using in the analytical part. Structure of this thesis is divided to the three main parts. The first part describes the analysis of unstructured data theoretically and explain the issues of cryptocurrencies. The second part devotes a draft of the solution for creating an analytical part. The third part maps the most discussion cryptocurrencies in the chosen source, identifies the development of the key topics for five chosen cryptocurrencies Bitcoin, Nxt, Dash, Monero and Counterparty and interconnects the key topics this cryptocurrencies with changes their exchange rates in relation to American dollar.

The aim of this thesis is to choose the proper measurement system for evaluating the performance of the LTE mobile networks based on long-term measurements. The thesis describes mobile network LTE, its architecture and introducts the Quality of Service in the LTE. In the next part are studied the known measurement methods and furthermore, there is proposed a solution in the form of long-term measurement. This measurement uses the mobile phone application Open-RMBT, which stores the measurement results into the database on the chosen server. The following part focuses on the issue of choosing a suitable mobile device for the measurement, then it describes a pilot testing and the followed run of the long-term measurements. In the last part is introduced the interractive application to plot graphs. Measurement results are discussed in the conclusion.

In 2019, there were about seventy-million Americans with uncontrolled high blood pressure (BP) or hypertension (HTN) (Kitt, Fox, Tucker & McManus, 2019). Hypertension is the leading cause of preventable deaths worldwide (Stephen, Halcomb, McInnes, Batterham & Zwar, 2019). Uncontrolled HTN contributes to stroke, myocardial infarction, and renal failure, and is the most modifiable risk factor for heart disease and death (American Academy of Family Physicians [AAFP], 2019; Oparil & Schmider, 2015). Patients living in rural America have an increased prevalence of HTN and their access to preventative health services is lower (Buford, 2016; Caldwell, Ford, Wallace, Wang & Takahashi, 2016). The increased prevalence of HTN in rural communities does not positively correlate with optimized blood pressure control, which poses a gap in care (Buford, 2016). A multidisciplinary collaboration between registered nurses (RNs) and providers may improve patient outcomes (Ford et al., 2018). The implementation of a collaborative HTN Clinic in a rural setting had the potential to improve BP outcomes by increasing access to services. The practice improvement project established a HTN Clinic as a collaborative effort between RNs and providers in a rural community. Providers and RNs were educated via modules regarding the protocol and participants took surveys before and after implementation to determine effectiveness and if the HTN Clinic should continue after conclusion of the practice improvement project. The HTN Clinic intervention implemented education for hypertensive patients with an emphasis on medication compliance and lifestyle modifications, as well as medication adjustments through nurse-led protocols. Despite a short duration of implementation and evaluation, positive results were observed. All HTN Clinic patients had improvement in BP measures and were controlled by the end of the four-week implementation period. Overall, patient access, wait times for appointments, and BP measures for all hypertensive patients improved after implementation. The providers’ and nurses’ knowledge increased through completion of a detailed curriculum. The provider and RN surveys indicated support for continuing the HTN Clinic to improve HTN management and clinic providers felt that the HTN Clinic helped improve their time with patients and quality metrics.

Adaptive streaming approaches over Hypertext Transfer Protocol (HTTP), such as Apple's HTTP Live streaming (HLS) and Microsoft's Live Smooth Streaming, have recently become very popular. This master's thesis project developed and evaluated several media rate adaptation algorithms optimized for mobile networks with a client running on Google's Android operating system. The deployed service supports HLS and the emerging ISO/IEC MPEG standard called Dynamic Adaptive Streaming over HTTP (MPEG-DASH). Live media was the focus of the evaluation, since this content can not be cached in advance at the user's device, hence the quality of the user's experience will be affected by the currently available bandwidth which the user can utilize. Experiments were performed for multiples scenarios illustrating different network capabilities, especially various amounts of bandwidth available to the user. This project has produced an implementation of HTTP-based adaptive streaming. This implementation follows the MPEG standard and enables robust and smooth playback of live video content via Google's Android devices. Results of the experiments have shown that the proposed adaptation mechanisms efficiently utilize the available bandwidth of the network. A clear conclusion of this thesis is that adaptive streaming will in fact enable substantial numbers of users to enjoy live media streaming to their devices / Adaptiv strömnings metoder över Hypertext Transfer Protocol (HTTP), till exempel Apples HTTP Live streaming (HLS) och Microsoft Live Smooth Streaming, har nyligen blivit mycket populära. Detta examensarbete utvecklas och utvärderar flera medier algoritmer anpassning av överföringshastigheten optimerad för mobila nätverk med en klient som körs på Googles Android-operativsystem. Systemet kommer att överväga HLS och den framväxande ISO/IECMPEG-standarden som kallas Dynamisk Adaptiv Strömmande över HTTP (MPEG-DASH). Direktsänd media var i fokus för utvärderingen, eftersom detta innehåll inte kan cachas i förväg på användarens enhet, därmed kvaliteten på användarens upplevelse kommer att påverkas av den aktuella tillgängliga bandbredden som användaren kan utnyttja. Experimenten utfördes för flera scenarier och illustrerar olika nätverksfunktioner, särskilt hur olika mängder bandbredd är tillgänglig för användaren. Detta projekt har producerat ett genomförande av HTTP-baserade adaptiva strömning. Denna implementering följer MPEG-standarden och möjliggör robusta och smidig uppspelning av direktsänd video innehåll via Googles Android-enheter. Resultat av experiment har visat att den föreslagna anpassningsmekanismerna effektiva sätt att utnyttja den tillgängliga bandbredden i nätverket. En tydlig slutsats i denna avhandling är att adaptive strömning faktiskt kommer att möjliggöra ett stort antal användare att njuta av direktsänd medieströmning till sina enheter.

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Video streaming on the Internet is increasingly using Dynamic Adaptive Streaming over HTTP (DASH), in which the video is converted into various quality levels and divided into two-second segments. A client can then adjust its video quality over time by choosing to download the appropriate quality level for a given segment using standard HTTP. Scalable Video Coding (SVC) is a promising enhancement to the DASH protocol. With SVC, segments are divided into subset bitstream blocks. At playback, blocks received for a given segment are combined to additively increase the current quality. Unlike traditional DASH, which downloads segments serially, this encoding creates a large space of possible ways to download a video; for example, if given a variable download rate, when should the client try to maximize the current segment's video quality, and when should it instead play it safe and ensure a minimum level of quality for future segments? In this work, we examine the impact of SVC on the client's quality selection policy, with the goal of maximizing a performance metric quantifying user satisfaction. We use acombination of analysis, dynamic programming, and simulation to show that, in many cases, a client should use a diagonal quality selection policy, balancing both of the aforementioned concerns, and that the slope of the best policy flattens out as the variation in download rateincreases.

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