The subject of this thesis is to evaluate investments in biogas plant purchased by company AGRA Deštná, a.s., which is located in Deštná, near Jindřichův Hradec. The thesis is divided into two main parts. The theoretical part is devoted to theoretical assumptions of investment evaluation, grants, theories and legislation related to the biogas plant. The practical part of the thesis describes the current situation of the company, investment, and economic evaluation of investment in the construction of biogas plants.

Les aérosols organiques (AO), issus de nombreuses sources et de différents processus atmosphériques, ont un impact significatif sur la qualité de l’air et le changement climatique. L’objectif de ce travail de thèse était d’acquérir une meilleure connaissance de l’origine des AO par l’utilisation de marqueurs organiques moléculaires au sein de modèles source-récepteur de type positive matrix factorization (PMF). Ce travail expérimental était basé sur deux campagnes de prélèvements réalisées à Grenoble (site urbain) au cours de l’année 2013 et dans la région parisienne (site péri-urbain du SIRTA, 25 km au sud-ouest de Paris) lors d’un intense épisode de pollution aux particules (PM) en Mars 2015. Une caractérisation chimique étendue (de 139 à 216 espèces quantifiées) a été réalisée et l’utilisation de marqueurs moléculaires primaires et secondaires clés dans la PMF a permis de déconvoluer de 9 à 11 sources différentes de PM10 (Grenoble et SIRTA, de façon respective) incluant aussi bien des sources classiques (combustion de biomasse, trafic, poussières, sels de mer, nitrate et espèces inorganiques secondaires) que des sources non communément résolues telles que AO biogéniques primaires (spores fongiques et débris de plantes), AO secondaires (AOS) biogéniques (marin, oxydation de l’isoprène) et AOS anthropiques (oxydation des hydrocarbures aromatiques polycycliques (HAP) et/ou des composés phénoliques). En outre, le jeu de données obtenu pour la région parisienne à partir de prélèvements sur des pas de temps courts (4h) a permis d’obtenir une meilleure compréhension des profils diurnes et des processus chimiques impliquées. Ces résultats ont été comparés à ceux issus d’autres techniques de mesures (en temps réel, ACSM (aerosol chemical speciation monitor) et analyse AMS (aerosol mass spectrometer) en différée) et/ou d’autres méthodes de traitement de données (méthodes traceur EC (elemental carbon) et traceur AOS). Un bon accord a été obtenu entre toutes les méthodes en termes de séparation des fractions primaires et secondaires. Cependant, et quelle que soit l’approche utilisée, la moitié de la masse d’AOS n’était toujours pas complètement décrite. Ainsi, une nouvelle approche d’étude des sources de l’AO a été développée en combinant les mesures en temps réel (ACSM) et celles sur filtres (marqueurs moléculaires organiques) et en utilisant un script de synchronisation des données. L’analyse PMF combinée a été réalisée sur la matrice de données unifiée. 10 facteurs AO, incluant 4 profils chimiques différents en lien avec la combustion de biomasse, ont été mis en évidence. Par rapport aux approches conventionnelles, cette nouvelle méthodologie a permis d’obtenir une meilleure compréhension des processus atmosphériques liés aux différentes sources d’AO. / Organic aerosols (OAs), originating from a wide variety of sources and atmospheric processes, have strong impacts on air quality and climate change. The present PhD thesis aimed to get a better understanding of OA origins using specific organic molecular markers together with their input into source-receptor model such as positive matrix factorization (PMF). This experimental work was based on two field campaigns, conducted in Grenoble (urban site) over the 2013 year and in the Paris region (suburban site of SIRTA, 25 km southwest of Paris) during an intense PM pollution event in March 2015. Following an extended chemical characterization (from 139 to 216 species quantified), the use of key primary and secondary organic molecular markers within the standard filter-based PMF model allowed to deconvolve 9 and 11 PM10 sources (Grenoble and SIRTA, respectively). These included common ones (biomass burning, traffic, dust, sea salt, secondary inorganics and nitrate), as well as uncommon resolved sources such as primary biogenic OA (fungal spores and plant debris), biogenic secondary AO (SOA) (marine, isoprene oxidation) and anthropogenic SOA (polycyclic aromatic hydrocarbons (PAHs) and/or phenolic compounds oxidation). In addition, high time-resolution filter dataset (4h-timebase) available for the Paris region also illustrated a better understanding of the diurnal profiles and the involved chemical processes. These results could be compared to outputs from other measurement techniques (online ACSM (aerosol chemical speciation monitor), offline AMS (aerosol mass spectrometer) analyses), and/or to other data treatment methodologies (EC (elemental carbon) tracer method and SOA tracer method). A good agreement was obtained between all the methods in terms of separation between primary and secondary OA fractions. Nevertheless, and whatever the method used, still about half of the SOA mass was not fully described. Therefore, a novel OA source apportionment approach has finally been developed by combining online (ACSM) and offline (organic molecular markers) measurements and using a time synchronization script. This combined PMF analysis was performed on the unified matrix. It revealed 10 OA factors, including 4 different biomass burning-related chemical profiles. Compared to conventional approaches, this new methodology provided a more comprehensive description of the atmospheric processes related to the different OA sources.

This thesis discusses source criticism from a critical perspective which encompasses its challenges, demands and possibilities for teaching practice. The questions guiding the core of this research are the following:1) What differentiates people’s activities in the process of evaluating sources? 2) What characterizes an effective practice in critical evaluation of sources? 3) Which criteria, factors and strategies might be important to consider in order to have a successful source critical methodology that promotes the improvement of critical thinking when analysing information and news?The studied materials include data from one survey and 54 semi-structured interviews. The interviews, analysed by using a methodology based on Grounded Theory, led to the development of a concept, critical source criticism (CSC), which define a broad perspective for the analysis of sources, and a related theoretical model (the CSC-model) aimed to be used for didactical purposes. The outcomes from this research suggest that different forms and levels of knowledge in history and social studies (in theory and practice), have a critical impact on the way we interact with information. The results also suggest that the combinations of theories and methodologies, alongside an emphasis on pluralism and multiperspectivity, can turn source criticism into an effective practice to achieve several educational goals. Subsequently, these results, are considered in the development of the proposed model in this thesis. The CSC-model developed in this study could be suitable for the analysis of information such as news, in planning of source-critical based teaching and in source critical discussions. I argue that this methodological structure, can be applied to facilitate the development of critical thinking, as well as other skills and abilities essential for democratic participation. This thesis Includes summaries in Swedish and Spanish as appendices".

Syftet med denna översikt har varit att presentera aktuella metoder för den källkritiska undervisningen i högstadiet. Vår frågeställning genom arbetet har varit, “vilka metoder kan lärare undervisa om inom källkritik för att lära ut ett källkritiskt förhållningssätt?” Genom systematiska sökningar i olika databaser valde vi ut tio artiklar som kunde hjälpa oss att besvara vår frågeställning. Dessa artiklar ligger till grund för vårt arbete och vi har strävat efter att hitta svensk, Nordisk och även internationell forskning. Artiklarna vi valt har behandlat källkritik som ett eget område inom skolan och samhället, men även i relation till ämnet svenska.  För att analysera resultatet av valda artiklar har vi använt oss av en tematiskt analys. Genom analysmetoden har vi kunnat urskilja utmärkande drag i forskningen och därefter kunnat benämna det som olika tema. Med våra tema fastställda kunde vi presentera de metoder som var mest framträdande i forskningen, men även visa på att det finns vissa begränsningar inom området. I resultatet lyfter vi bland annat fram tre viktiga nyckelfrågor i en digital sökprocess och presenterar även en metod som vi benämner lateral läsning. Den laterala läsningen syftar till att bredda digitala sökningar och undersöka information på flera olika hemsidor. Vidare presenterar vi vad forskningen förespråkar om undervisning gällande källkritik där vi också drar slutsatsen att forskarna inte är överens om undervisningen ska ske explicit, eller implementeras som en del av den ordinarie undervisningen.

(English) The purpose of this diploma thesis was to analyze a role of Sputnik Česká republika (Sputnik Czech Republic) website as an information source in the ecosystem of the so-called alternative media. The main research method was quantitative content analysis. In the practical part of the work - using available metadata sraped with Outwit Hub -, this thesis described content of articles published on Sputnik Česká republika and other selected alternative media. Next, with the use of online marketing tools and other sources, it compared similarities of content and user behaviour. Next, it compared similarities of content and user behaviour on a sample of selected websites. The result of this was evaluation of possible importance of Sputnik Česká republika in the ecosystem of alternative media and pointing out some new elements and connections within this system. Possible usage of this thesis comprises follow-up research and education in fields of information and media literacy, especially in the issue evaluation of information sources.