The thesis on comparing products to ensure the colloidal stability of white wines before bottling in the theoretical part examined the definition of colloid division of disperse systems and their relation to wine. Further described is the main cataracts occurring in wines and methods to prevent them, focusing on the practice of the most commonly used products: Metatartaric acid, gum arabic and carboxymethylcellulose (CMC). In the practical part of these products in different variations, combinations and concentrations added to white wine, which was a non-stabilized against the tartar and proteins. This wine was in the wake of bottling and variants of the same stored for one year in two different storage temperatures. In the course of storage was observed formation of cataracts in individual bottles. After a year all variants were opened and evaluated was total sensory analysis with qualification and quantification of turbidity, sediment filtration and weighing, measuring conductivity and pH. The results were statistically processed and evaluated with recommendations for practice.

PINHEIRO, Diego da Silva. Sobre a escassez de hipersuperfícies tipo-espaço cmc e não totalmente geodésicas de grupos de Lorentz. 2017. 52 f. Dissertação (Mestrado em Matemática)- Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2017. / Submitted by Andrea Dantas (pgmat@mat.ufc.br) on 2017-03-14T18:17:40Z No. of bitstreams: 1 2017_dis_dspinheiro.pdf: 425254 bytes, checksum: c13b691edaa54ffcf9623cda649f5d1e (MD5) / Approved for entry into archive by Rocilda Sales (rocilda@ufc.br) on 2017-03-20T15:36:52Z (GMT) No. of bitstreams: 1 2017_dis_dspinheiro.pdf: 425254 bytes, checksum: c13b691edaa54ffcf9623cda649f5d1e (MD5) / Made available in DSpace on 2017-03-20T15:36:52Z (GMT). No. of bitstreams: 1 2017_dis_dspinheiro.pdf: 425254 bytes, checksum: c13b691edaa54ffcf9623cda649f5d1e (MD5) Previous issue date: 2017-02-22 / The results of this work can be seen as giving a sort of heuristic explanation of why it is so hard to give examples of non totally geodesic, complete, spacelike, cmc hypersurfaces Mn of a Lorentzian group Gn+1. More precisely, let N be a timelike unit vector field on M and suppose that the Ricci curvature of G in the direction of N is greater than or equal to − H2 n , where H is the mean curvature of M with respect to N. If M is compact and transversal to a timelike element of the Lie algebra of G, then we show that it is a lateral class of a Lie subgroup of G and, as such, totally geodesic in G. If M is noncompact and parabolic, then we get the same result, provided M has bounded hyperbolic Gauss map. We also discuss some related examples and, along the way, give a simple proof of the parabolicity of a Riemannian product of a compact and a parabolic Riemannian manifold. / Os resultados deste trabalho podem ser vistos como uma curta explanação heurística sobre a dificuldade de encontrar exemplos de hipersuperfícies Mn tipo-espaço cmc não totalmente geodésicas e completas, em um grupo de Lorentz Gn+1. Mais precisamente, seja N um campo vetorial unitário tipo-tempo em M e suponha que a curvatura de Ricci de G na direção de N é maior do que ou igual a − H2 n , onde H é a curvatura média da referida hipersuperfície tipo-espaço com respeito a N. Se M é compacta e transversal a um elemento tipo-tempo da álgebra de Lie de G, então mostramos que M é uma classe lateral de um subgrupo de Lie de G e, portanto, é totalmente geodésica em G. Se M é não compacta e parabólica, então conseguimos o mesmo resultado, desde que a aplicação de Gauss hiperbólica seja limitada. Também discutiremos alguns exemplos relacionados e, no decorrer da explanação, daremos uma prova simples da parabolicidade do produto de variedades riemannianas parabólicas e compactas.

Studiens syfte är att undersöka hur pseudonymitet och/eller pseudoanonymitet påverkar diskussionen av svensk politik på nätet samt de för och nackdelar som kan finnas med denna eventuella förändring. Undersökningen är dock begränsad till effekterna på diskussionerna som hålls på Reddit/r/svenskpolitik. För att kunna granska detta undersöks användarnas egen uppfattning om hur beteenden och diskussioner förändras på ett forum med pseudonymitet, samt att det genomförs en argumentationsanalys av en slumpvis utvald post på forumet för att kunna ställa användarnas uppfattningar emot det faktiska beteende och kommunicerade som sker på forumet. Användarnas egen uppfattning inhämtas genom en enkätundersökning och bearbetas genom en kvantitativ innehållsanalys. Den slumpvis utvalda posten bearbetas med en pro et contra metod för att finna strukturer och analyseras sedan efter en kvalitativ innehållsanalys. Undersökningen lutar sig på forskning kring hur anonymitet på nätet påverkar individer och gruppers beteende och kommunikation samt gruppolariseringsteorin för att kunna granska och förklara hur pseudonymitet och/eller pseudoanonymitet kan förändra beteenden och kommunikation. Undersökningen finner att användarna upplever en förändring i beteende och kommunikation på grund av pseudonymitet och/eller pseudoanonymitet samt att de upplever att denna förändring är större bland andra användare än land dem själva. Undersökningen finner även att det finns en upplevd gruppolarisering hos användarna. Användarna finner att fördelarna och nackdelarna båda beror på den mer öppna diskussionen som medföljer konsekvensfriheterna på ett forum med pseudonymitet och pseudoanonymitet. Undersökningen finner också att det i den slumpvis utvalda posten återfinns spår av gruppolarisering samt mer extrema åsikter. Det finns också en tydlig invandringskritisk underton i posten som får stöd i de röstningssystem som finns på forumet. Resultaten visar också på en komplexitet i frågan om anonymitetens vara eller icke vara med tydliga för- och nackdelar men ingen koncensus.

The past decade has witnessed a proliferation of internet use for socialising with dedicated websites such as Facebook, and also for maintaining relationships using computer mediated communication. Individuals can extend the boundary associated with traditional forms of communication, and use technology to meet strangers online to share interests, or maintain existing relationships remotely. One of the most significant functions of computer-mediated communication (CMC) is its contribution to the evolution of social communication. CMC is “communication that takes place between human beings via the instrumentality of computers” (Thurlow, Lengel, & Tomic, 2004). As a consequence of the convenience and flexibility that this channel provides, CMC can be effectively used to orchestrate a variety of communication situations. Furthermore, social networks sites are becoming the choice in which individuals are maintaining relationships or meeting new people. The potential distinctions between these relationships and their offline counterparts remain contradictory. Online relationships may face different challenges, such as anonymity, restricted interaction (Walther, 1992), and the lack of physical presence. For example, sharing activities online such as playing games or visiting Web sites together differs from offline activities, such as going to the movies or dining together. These observations question whether CMC relationships have any parallels with real world relationships. Dunbar (1992) structured real world relationship by strength of ties and formulated the social brain hypothesis (SBH). This work uses the SBH as an interpretive lens in analyzing CMC relationship ties. Thus, a major focus of this work is to investigate implications of the SBH (Dunbar, 1992) within the context of CMC usage. It is recognised that CMC allows for the maintenance of a large number of friendships. Thus potentially, the use of CMC could alter the SBH ratios. Within the main findings consistency with SBH was found. Furthermore, CMC has many parallels with real world communication methods. Face-to-face communications were strongly preferred for maintenance of strong ties. Also phone usage was analysed and identified as an indicator of strong tie relationships, for both local and distant communications. The findings also address questions on displaced communities communication habits and their use of CMC. The phone was found to be most popular media and culture had a strong influence on communication content. The research used a mixed method approach, combining data collection via questionnaires, semi structured interviews and a diary study completed by participants. Based on the findings, a framework is proposed categorising groups on their level of real world socialising and CMC use. There are four essential contributions impacting on current theory. The findings offer new knowledge within the research of CMC and relationship maintenance theory. In our understanding these exploratory questions have not yet been addressed and therefore the findings of this research project are significant in their contributions.

This article provides a case study account of the language functions of tipo, which is a pragmatic feature of Argentine Spanish vernacular, as used by 10 young adult native speakers of the language (ages 18-25), in the context of oral face-to-face and synchronous technology-mediated written interactions with young adult Spanish L2 learners. An examination of naturally occurring and self-reported language awareness data suggests that tipo has acquired a wide array of pragmatic functions it is a marker of hesitation, exemplification, reformulation, vagueness, and quoted speech. In its non-pragmatic marking uses, it can refer to an unspecified man, preface a hyponym, and be used to make a comparison. Participants' usage patterns, in conjunction with their understanding of sociopragmatic variability in the use of tipo, are discussed as a direction for research in colloquial features of youth vernacular.

Lean premixed combustion is at present one of the most promising methods to reduce emissions and to maintain high efficiency in combustion systems. As the emission legislation becomes more stringent, modelling of turbulent premixed combustion has become an important tool for designing efficient and environmentally friendlier combustion systems. However, in order to predict these emissions reliable predictive models are required. One of the methods used for predicting pollutants is the conditional moment closure (CMC), which is suitable to predict pollutants with slow time scales. Despite the fact that CMC has been successfully applied to various non-premixed combustion systems, its application to premixed flames is not fully tested and validated. The main difficulty is associated with the modelling of the conditional scalar dissipation rate (CSDR) of the conditioning scalar, the progress variable. In premixed CMC, this term is an important quantity and represents the rate of mixing at small scales of relevance for combustion. The numerical accuracy of the CMC method depends on the accuracy of the CSDR model. In this study, two different models for CSDR, an algebraic model and an inverse problem model, are validated using two different DNS data sets. The algebraic model along with standard k-ε turbulence modelling is used in the computations of stoichiometric and very lean pilot stabilized Bunsen flames using the RANS-CMC method. A first order closure is used for the conditional mean reaction rate. The computed nonreacting and reacting scalars are in reasonable agreement with the experiments and are consistent with earlier computations using flamlets and transported PDF methods for the stoichiometric flames, and transported PDF methods for the very lean flames. Sensitivity to chemical kinetics mechanism is also assessed.

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Interaction involves people communicating and reacting to each other. This process is key to the study of discourse, but it is not easy to study systematically how interaction takes place in a specific communicative event, or how it is typically performed over a series of repeated communicative events. However, with a written record of the interaction, it becomes possible to study the process in some detail. This thesis investigates interaction through asynchronous written discussion forums in a computer-mediated learning environment. In particular, this study investigates pragmatic aspects of the communicative event which the asynchronous online discussions comprise. The first case study examines response patterns to messages by looking at the content of initial messages and responses, in order to determine the extent to which characteristics of the messages themselves or other situational factors affect the interaction. The second study examines in what ways participants use a range of discourse devices, including formulaic politeness, humour and supportive feedback as community building strategies in the interaction. The third study investigates the role of the subject line of messages in the interaction, for example by examining how participants choose different types of subject lines for different types of messages. The fourth study examines to what extent features serving a deictic function are drawn on in the interaction and then compares the findings to both oral conversation and formal academic discourse. The overall findings show a complex communicative situation shaped by the medium itself, type of activity, the academic discipline and topic of discussion and by the social and cultural aspects of tertiary education in an online learning environment. In addition, the findings may also provide evidence of learning.

No description available.

The lack of physical communication cues, such as facial expressions, in text-only communication has prompted the creation of emoticons to represent feelings. Moreover, the emoticon has become a new “cultural” language adopted by a community of users who find emoticons useful for expressing an emotional state during their online communication. Using emoticons in computer-mediated communication (CMC), which includes any means of communication on the Internet, especially instant messaging (IM) programs, helps users convey and enhance the underlying emotional aspects of their communication facilitating user communication by providing non-verbal cues and clues to clarify a message. Although many researchers have studied the differences in the use of emoticons between males and females and different age groups and some even report cross-cultural differences and similarities between CMC and face-to-face (FTF) communication such research is not sufficient to understand the effective use of emoticons. The current research explores three categories of emoticons - textual, pictorial, and animated emoticons – to ask the broad question: Do North Americans and South Koreans use emoticons differently? The research examines the cross-cultural differences involved in using emoticons, focusing on the visual aspect of online communication that provides emotional cues to understand the differences in their use. Textual emoticons and pictorial emoticons of MSN messenger are used in this study's questionnaires. The results indicate the cross-cultural differences of emoticon use and recognition between North Americans and South Koreans.