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Rephrase! - A web game where people show their sentence formulation skills
Hájková, Aneta ; Bojar, Ondřej (advisor) ; Vidová Hladká, Barbora (referee)
Sentence paraphrases are one type of linguistic data, which are difficult to create or extract by machine. They have applications which require many paraphrases per sentence. Aim of this bachelor thesis is to design and create a tool for acquiring of paraphrases that overcomes both these problems. The tool is web game, where required data is provided by players. With this game, we are going to demonstrate the specific problems of paraphrase acquirement and compare our method with different approaches. We will discuss generic obstacles emerging from relying on work of large number of volunteer contributors. At the last, we will show several usages for sentence paraphrases in the field of computer linguistics. Powered by TCPDF (www.tcpdf.org)
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Online labour markets
Špacír, Jan ; Kubátová, Jaroslava (advisor) ; Šlerka, Josef (referee)
(in English): The thesis deals with online labour markets. They are differentiated against job portals and have their characteristics and specific variations relevant to workers and employers analysed. The thesis also differentiates a Talent Market. The analysis identifies geographical distribution of workers as well as the workforce composition related to primary area of expertise. A significant borderline between the dominant fields of work in the east and west is found. The analysis also focuses on fees imposed by individual portals and their relation to the utility of a given portal. In the conclusion, recommendations concerning choosing the most suitable market with regard to the nature and length of the project are given.
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Critical reflection of projects and platform Ushahidi
Růžičková, Silvie ; Souček, Martin (advisor) ; Valůch, Jaroslav (referee)
This presented work deals with crowdsourcing tools for mapping and filtering of data that are created by the Ushahidi, Inc. and ways of their use. Ushahidi and SwiftRiver platforms and hosted version of Ushahidi called Crowdmap are counted among the tools for crisis mapping; however, more and more they are also used for other topics or issues. The aim of this work is to subject to a critical point of view not only the Ushahidi platform as a tool, but also a number of significant or interesting projects in which it was used. Presented is also the recommendation, how to use Ushahidi to create a successful project and the other way round what to avoid, when you work with Ushahidi. The basic building elements of Ushahidi are crowdsourcing, citizen journalism, geospatial information, and in particular the work of volunteers. This work describes the role of these building elements in Ushahidi, and subjects to critical reflection also the problematic sides, which Ushahidi is struggling with. Following is the analysis of selected sample of Ushahidi and Crowdmap deployments, which deals with the thematic, geographical and time stratification of the maps in the sample. Some significant uses of Ushahidi with humanitarian and non-humanitarian purpose of the deployment are examined in the end.
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Impact of resolution change on subjective QoE measurement of streaming video
Nevřelová, Monika ; Pokorný, Jiří (referee) ; Kováč, Dominik (advisor)
This thesis deals with the process of development of web application for subjective evaluation of streaming video. The thesis describes the adaptive streaming technique, streaming services and both subjective and objective evaluation of streaming video. Methods for measuring of subjective evaluation (namely laboratory method and crowdsourcing method) are described in more detail. A special web-based tool for subjective evaluation of streaming video was created with use of HTML, PHP and MySQL languages. To simulate the network changes, such as changes of the bandwidths, there´re created scenarios where the player selects the quality of the streamed video. The process of collecting data via Laboratory method and Crowdsourcing method is described in the thesis. Collected data are then analyzed.
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Online fundraising and microfinance in the context of social networks and Web 2.0
Richterová, Daniela ; Kera, Denisa (advisor) ; Očko, Petr (referee)
Identifikační záznam Richterová, Daniela. On line fundraising a mikrofinancování v sociální síti a na Webu 2.0 [Online fundraising and microfinace in the context of social networks and Web 2.0]. Praha, 2011. 102 s. Diplomová práce. Univerzita Karlova v Praze, Filozofická fakulta, Ústav informačních studií a knihovnictví 2011. Vedoucí diplomové práce Mgr. Denisa Kera, Ph.D. Abstract The main focus of this thesis is to characterize online fundraising and microfinance tools in the context of Web 2.0 and social media. The main goal is to analyze and assess the existing philanthropic portals in the Czech Republic and abroad. The thesis includes a theoretical explanation of terminology, principles and technologies of Web 2.0 and social media platforms and their connection to online philanthropy. New phenomena such as crowdfunding, P2P lending and crowdsourcing are clarified. The analytical part focuses on the evaluation of fundraising portals Network for Good and GlobalGiving and microfinace portals Kiva and LoanBack. Czech philanthropic online projects are represented by Šance pro draha, myELEN, Daruj správně and Skutečný dárek. Particular emphasis is given to monitoring and evaluating the extent of Web 2.0 principles and technologies integration. The conclusions contain suggestions for implementing the findings...
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Virtual volunteering on the internet
Ubias, Emil ; Souček, Martin (advisor) ; Dombrovská, Michaela (referee)
The aim of the thesis is to describe and evaluate the general volunteering opportunities on the internet and describe volunteer experience in the operation, development and changes of the Open Directory Project (ODP) as an example of content management project. This thesis seeks to collectively map the issue capture and volunteering in the Internet environment. It specifies the sources and monitors the possibilities to participate in volunteer activities on the Internet.
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Prediction Markets - Trade Based Mediation
Randus, Tomáš ; Švelch, Jaroslav (advisor) ; Kyjonková, Petra (referee)
Prediction Markets -Trade Based Mediation Tomáš Randus Abstract Prediction markets are a collective intelligence, crowdsourcing and gamification based information systems. They organize and validate a wide information imputes into a form suitable for medial purposes. There are a significant number of currently running systems provided by universities, companies and other oganisations. Prediction markets are in detail huge gaming systems with simulated stock market implementations. There are some controversies connected with political and strategic usage of those systems. The rest of usages like show business, sport, medical etc. are legitimate.
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OpenStreetMap contributor activity in the Czech Republic
Vaidiš, Martin ; Moudrý, Vítězslav (advisor) ; Komárek, Jan (referee)
Today on the internet, the amount of User generated content (UGC) is increasing as fast as never before. One of its very well usable representatives are Volunteered geographic informations (VGI), which were recently gathering a lot of interest. This applies especially on the most succesfull project based on collaborative mapping - OpenStreetMaps (OSM). Beside the brief introduction of VGI and its possibilities of use, the literature research part of this work takes a closer look at OSM, its structure and its comunity of more than two and a half millions members. The paper also presents ways to get information about the activity of contributors, which is then applied it the analytical part of the work. That is mainly focused on active users in the Czech Republic and its neighbours - Germany, Poland, Slovakia and Austria. By examining data of one year, it was found, among other facts, that the number of contributors in Czech Republic is increasing much more slowly than in the community as a whole. Also, the ratio of the most active members in Czech Republic is significantly lower than usual. The results also showed, that the number of edits made to the OSM database by an average Czech contributor is significantly greater than by others, which were inclueded in this reaserch. At the same time, the importance and potential causes of these anomalies are discussed, and finally, it is proposed how the results may be used for future research.
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Android application for measuring user satisfaction with mobile data service
Kunc, Jaroslav ; Povoda, Lukáš (referee) ; Červenák, Rastislav (advisor)
The bachelor thesis focuses on user satisfaction with mobile data services. The thesis in this context explains the terms of Quality of Service, Quality of Experience and Crowdsourcing. An another part of a thesis is focusing on describing the development of applications for the Android platform, including the distribution and application testing. In the practical part of thesis, the application for the Android platform is created and it is predicting the user satisfaction with mobile data services on the basis of an analytical model for calculating MOS (Mean Opinion Score).
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Visipedia - Multi-Dimensional Object Embedding Based on Perceptual Similarity
Matera, Tomáš ; Hradiš, Michal (referee) ; Zemčík, Pavel (advisor)
Problémy jako je jemnozrnná kategorizace či výpočty s využitím lidských zdrojů se v posledních letech v komunitě stávají stále populárnějšími, což dosvědčuje i značné množství publikací na tato témata. Zatímco většina těchto prací využívá "klasických'' obrazových příznaků extrahovaných počítačem, tato se zaměřuje především na percepční vlastnosti, které nemohou být snadno zachyceny počítači a vyžadují zapojení lidí do procesu sběru dat. Práce zkoumá možnosti levného a efektivního získávání percepčních podobností od uživatelů rovněž ve vztahu ke škálovatelnosti. Dále vyhodnocuje několik relevantních experimentů a představuje metody zlepšující efektivitu sběru dat. Jsou zde také shrnuty a porovnány metody učení multidimenzionálního indexování a prohledávání tohoto prostoru. Získané výsledky jsou následně užity v komplexním experimentu vyhodnoceném na datasetu obrázků jídel. Procedura začíná získáváním podobností od uživatelů, pokračuje vytvořením multidimenzionálního prostoru jídel a končí prohledáváním tohoto prostoru.
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