Perception in L2 in a Classroom Environment with L2 Portuguese Chinese Students

The purpose of this study is to contribute to the knowledge on the impact of common European Portuguese (EP) phonetic-phonological processes in second language (L2) learners. It is well established that L2 listening is a complex process, and that the most common difficulties among L2 learners are related to speech segmentation and word recognition. Due to the occurrence of connected speech processes, sounds are altered and the word boundaries can be hard to determine. Vowel reduction within and across word boundaries is usually described as a very frequent process in EP. The reduction of vowels is even more evident in spontaneous speech, e.g. the word 'telefone' (jtifi'foni] in the citation form, 'telephone') can be produced as [t'fon]. The interplay between these processes can be particularly impactful for L2 learners, in word recognition. Furthermore, this correlation is scarcely studied in a classroom setting. The present study explores the impact of vowel reduction and connected speech processes in word recognition tasks from isolated words to continuous speech. Furthermore, it aims to understand the main difficulties that L2 learners, at the intermediate levei B 1, experience dealing with these phenomena. Lastly, it will contribute to understand not only the acquisition of vowel reduction and connected speech processes but also whether L2 learners could cope with them. Therefore, it was designed a set of perception experiments involving these phenomena in increasing degrees of difficulty: single word identification without (i) and with vowel reduction (ii); word identification with simple (iii) and complex connected speech processes (iv). The experiments were conducted in an ecological setting of an intensive Portuguese course, of the intermediate levei B 1, at the University of Lisbon. A contrai group of EP native speakers also performed the experiments. The overall scores revealed a decreasing tendency: (i) 94%; (ii) 65%; (iii) 31 %; (iv) 16%. The results reveal that word recognition is compromised due to the connected speech processes. Vowel reduction and the consequent deletion of segments also affects the recognition of isolated spoken words even in read speech. The didactic outcomes of the experiments are relevant to contribute to the design of a proposal of a set of listening exercises focused on the practice of these phonetic-phonological phenomena. The sequence is based on the use of Computer-Assisted Language Learning (CALL) technology, and includes two games and a set of perception exercises in which songs are also used as input.Este estudo tem como objetivo contribuir para o conhecimento do impacto dos processos fonético-fonológicos do Português Europeu (PE), em aprendentes de PE Língua Segunda (L2). Pela nossa experiência como falantes nativos, sabemos que ouvir na própria língua nativa (LI) é um processo natural e intuitivo, ainda que complexo. No entanto, talvez por experiência própria também se saiba que, quando se aprende uma língua estrangeira, um dos maiores desafios está relacionado com a compreensão oral. Os mecanismos auditivos que intervêm na compreensão oral da língua nativa são os mesmos que intervêm na compreensão oral da L2. Ouvir e compreender uma língua estrangeira é um processo muito complexo. Quando ouvimos, é necessário segmentar o discurso, e reconhecer as palavras no contínuo sonoro. No entanto, devido à ocorrência de processos fonéticos, próprios do discurso oral, os sons são alterados e coarticulados. Ao processar a L 1, os falantes nativos não têm quaisquer dificuldades. Pelo contrário, os aprendentes L2 podem ter várias dificuldades no que diz respeito ao reconhecimento de palavras no contínuo sonoro. Dada a ocorrência dos vários fenómenos de coarticulação, as fronteiras de palavra deixam de ser percetíveis e evidentes. Em PE, a redução vocálica está bem descrita na literatura, e é referida como um processo muito produtivo. Uma das suas características é promover a redução e o apagamento de vogais átonas. Como resultado, há uma frequente ocorrência de sequências fonéticas de consoantes nas produções orais. Interessa também salientar que a redução vocálica não só ocorre em fala espontânea como também é frequente em fala semi-espontânea e não espontânea. O PE também é rico em processos de coarticulação, e muitos deles estão em direta relação com a redução e o apagamento das vogais átonas. Os processos de discurso oral contínuo muito bem estudados e descritos. Entre os processos de coarticulação estão os encontros vocálicos, os fenómenos de sândi, a assimilação do vozeamento e a inserção da iode Li]. Estes processos causam diversas alterações nos sons das palavras, sobretudo nos que estão presentes nas fronteiras de palavra. Além disso, promovem ainda a realização e a inserção de outros sons, que não têm uma representação gráfica. Outros são responsáveis pela restruturação da estrutura silábica, causando a articulação entre os sons das palavras vizinhas. Do que é conhecido da literatura, a interação entre a redução vocálica e os fenómenos de sândi externo, coarticulação, assimilação, etc. , e o seu impacto na compreensão oral de aprendentes L2 ainda não está estudada. Além disso, ainda não existem estudos realizados em contexto ecológico de sala de aula, que se debrucem sobre esta correlação. Pelo que se sabe, também, o ensino destes processos fonético-fonológicos não é amplamente explorado nos diversos referênciais e programas de ensino de PLE. Como tal, existe a necessidade de consciencializar os alunos para a ocorrência destes processos na oralidade, e de como têm impacto na sua compreensão oral. Isso terá também uma relação direta com a aprendizagem e o desenvolvimento da proficiência dos estudantes. Portanto, o presente estudo tem como objetivo explorar o impacto da ocorrência de processos fonético-fonológicos, tais como a redução vocálica e os processos da oralidade, em tarefas de reconhecimento e identificação de palavra. Estas tarefas foram realizadas quer em contextos de palavra isolada quer em contextos de discurso oral contínuo. Além disso, este estudo procura entender, e descrever, as maiores dificuldades dos aprendentes L2, no nível intermédio B 1, face à presença destes processos fonéticos na oralidade. Finalmente, este estudo será não só um contributo para um melhor conhecimento do processo de aquisição da redução vocálica e dos fenómenos de coarticulção, mas também para entender em que momento do processo de aprendizagem os estudantes precisam de treinar estas estruturas. Portanto, foi criada uma sequência de testes percetivos que incluíram a ocorrência destes fenómenos em diferentes níveis de complexidade: tarefas de reconhecimento de palavra isolada sem (i) e com a produção de redução vocálica (ii); tarefas de reconhecimento de palavra com ocorrência dos processos de discurso oral em contextos simples (iii) e complexos (iv). Os testes de perceção foram aplicados em contexto ecológico de sala de aula de um curso intensivo anual de Português Para Estrangeiros (PLE), do nível intermédio (Bl ), na Universidade de Lisboa. Todos os participantes eram falantes nativos do Chinês Mandarim. Os testes também foram aplicados a um grupo de controlo, composto por falantes nativos do PE. Nos resultados obtidos houve, em geral, uma tendência de decréscimo das percentagens para as respostas corretas conforme o aumento da complexidade das estruturas linguísticas: (i) 94%; (ii) 65%; (iii) 31 %; (iv) 16%. Estes resultados indicam que a ocorrência dos fenómenos do discurso oral comprometeram a tarefa de reconhecimento de palavra, nos diversos contextos. No entanto, este impacto foi bastante evidente nos contextos que testaram fala (serni-) espontânea. Além disso, a redução vocálica, e o consequente apagamento de vogais átonas, afetou ainda o reconhecimento de palavras isoladas. Para complementar estes resultados, foi também realizada a análise das transcrições ortográficas dos alunos que permitiu a descrição dos erros ortográficos mais frequentes. Por outro lado, contribuíram também para entender a interação entre a oralidade e a escrita na sua aprendizagem do PEcomo L2. As transcrições revelaram também que a presença da redução vocálica aumentou a produção de grupos consonânticos fonéticos, algo que se tornou evidente pelo facto de, frequentemente, apenas partes das palavras-alvo (ou apenas consoantes) terem sido transcritas. É importante também salientar que, aquando da realização das tarefas de identificação de palavras em contexto de fala (serni-) espontânea (com a presença de fenómenos de coarticulação), vários alunos transcreveram sequências de palavras articuladas, incluindo os sons articulados e alterados por processos de assimilação, por exemplo. Do ponto de vista didático, os resultados obtidos foram relevantes para a construção de uma proposta de uma sequência didática com exercícios para a prática e para o treino da componente auditiva. Esta proposta de exercícios tem um especial ênfase no ensino dos processos fonéticofonológicos do PE. Esta sequência é baseada na tecnologia existente para a Aprendizagem de Línguas Assistida por Computador (ALAC). Portanto, foram desenhados dois jogos, uma versão do clássico 'Jogo da Forca' e o jogo das 'Palavras Bomba-Relógio'. Finalmente, a sequência também inclui uma série de exercícios de perceção oral, intitulada 'À Procura dos Limites' no qual se pretende praticar o reconhecimento das fronteiras das palavra em diferentes contextos de coarticulação. Além disso, a série inclui uma secção de exercícios lúdica, nos quais são utilizadas músicas portuguesas como input auditivo

The Media in the Network Society: Browsing, News, Filters and Citizenship

560 p. : ill. ; 23 cm.Libro ElectrónicoIn the Network Society the development of a new communicational model has been taking shape. A communicational model characterized by the fusion of interpersonal communication and mass communication, connecting audiences and broadcasters under a hypertextual matrix linking several media devices. The Networked Communication model is the informational societies communication model. A model that must be understood also in its needed literacies for building our media diets, media matrixes and on how it’s changing the way autonomy is managed and citizenship exercised in the Information Age. In this book Gustavo Cardoso develops an analysis that, focusing on the last decade, takes us from Europe to North America and from South America to Asia, combining under the framework of the Network Society a broad range of scientific perspectives from Media Studies to Political Science and Social Movements theory to Sociology of Communication.Index of Figures Index of Tables Preface Acknowledgements The Media in the Network Society. Contextualizing the Media in the Network Society; Media, Autonomy and Citizenship 1. The Multiple Dimensions of the Network Society. The Network Society; The Culture of the Informational Societies 2. Societies in Transition to the Network Society. Societies in Transition in the Global Network; Societies in Transitions, Values and Social Well-Being; Media and Social Change in the Network Societies 3. From Mass to Networked Communication: Communicational Models and the Informational Society Communicational Models and the Informational Society. Communicational Globalization in the 20th Century; Mass Media and New Media: the Articulation of a New Communicational Model?; Rhetoric, Accessibility of Information and Narratives Networked Communication 4. A Constellation of Networks: Mass Media, Games, Internet and Telephones. An Entertainment Meta-System in Transition: from Multimedia Games to Television; The New Entertainment Player: Multimedia Games; The Reaffirmation of TV as a Central Element of the Entertainment Meta-System; From Interactive Television to Networked Television 5. Has the Internet Really Changed the Mass Media?. From the End of Journalism to Its Reconstruction; The Information Meta-System and Its Network Organization; Television: the New Online Functions; From Radio Interactivity to Newspaper; Time Management: the Media Network 6. The Massification of the Internet Experience. The New Frontiers and Their Entry Portals; Media, Memory and Filters 7. Media and Citizenship in the Network Society. Mediation of Citizenship and Informational Literacy; The Different Media Ages; Different Media Ages, Different Forms of Citizenship? 8. Mediated Politics: Citizens and Political Parties in Continuous Democracy; An Institutional and Parliamentary; Framework for Continuous Democracy; The Internet as Hostage of Institutional Informational Politics? 9. Media, Mobilization and Protests. Goku vs. The Ministry of Culture: Terràvista, Television and Newspapers; The Closure of RTP2: Television Seen from the Internet; The Pro-East Timor Movement: Human Rights, Mass Media and the Internet; Instrumentalization of the Networked Symbolic Mediation Conclusion: Browsing, News, Filters and Citizenship.Browsing, News, Filters and Citizenship Bibliograph

1ST Volume

João Carlos Correia, Anabela Gradim e Ricardo Morais (Eds.) (2020) Pathologies and dysfunctions of democracy in the media context - 1st volume.In the last decade, from a communicative point of view, a lot of novelties and changes shaped the traditional public sphere, Donald Trump's election in the United States of America, the Brexits, the rising of the several xenophobic and ultra-nationalist threats emerging in different geographical and political contexts, the populism phenomena, as well as the te debate on Cyber surveillance, counter-information, and the so-called "fake news" has drawn attention to some dystopian portrays conceived in the 20th Century which is now being considered an appropriate depiction of democracy and political communication's new pathologies. The book joins together researchers from Communication Sciences and related areas (Political Science, Political Theory, Political Philosophy, Political Sociology, Arts, and others), with particular emphasis on those interested in political communication around a unifying common axis: the pathologies and dysfunctions of democracy, in media contexts, in different aspects of their involvement with the media such as the media representation of these pathologies and dysfunctions; the impact of the media in the functioning of democratic institutions; the interference of political agents in journalistic information; the relationship between media and political institutions in the processes of public opinion building. Particularly, on this volume one addresses to the topic of surveillance. Within digital social networks and infotainment, invisibility, the right to be forgotten, and the reserve of a private life acquire an almost subversive nature in an age defined by hiper-communication. Simultaneously, the media staging of power mobilizes protagonists to a reality in which rationality and public responsibility are confronted with multiple risks of scandal arising from a permanent state of collective scrutiny. "Scandalogy" is a concept already used to project the study of image crisis’ phenomena, increasingly emerging due to the opportunities of political exposure.info:eu-repo/semantics/publishedVersio

Social Media Text Processing and Semantic Analysis for Smart Cities

With the rise of Social Media, people obtain and share information almost instantly on a 24/7 basis. Many research areas have tried to gain valuable insights from these large volumes of freely available user generated content. With the goal of extracting knowledge from social media streams that might be useful in the context of intelligent transportation systems and smart cities, we designed and developed a framework that provides functionalities for parallel collection of geo-located tweets from multiple pre-defined bounding boxes (cities or regions), including filtering of non-complying tweets, text pre-processing for Portuguese and English language, topic modeling, and transportation-specific text classifiers, as well as, aggregation and data visualization. We performed an exploratory data analysis of geo-located tweets in 5 different cities: Rio de Janeiro, S\~ao Paulo, New York City, London and Melbourne, comprising a total of more than 43 million tweets in a period of 3 months. Furthermore, we performed a large scale topic modelling comparison between Rio de Janeiro and S\~ao Paulo. Interestingly, most of the topics are shared between both cities which despite being in the same country are considered very different regarding population, economy and lifestyle. We take advantage of recent developments in word embeddings and train such representations from the collections of geo-located tweets. We then use a combination of bag-of-embeddings and traditional bag-of-words to train travel-related classifiers in both Portuguese and English to filter travel-related content from non-related. We created specific gold-standard data to perform empirical evaluation of the resulting classifiers. Results are in line with research work in other application areas by showing the robustness of using word embeddings to learn word similarities that bag-of-words is not able to capture

2nd Volume

Democracy and political practices are suffering a major shift. Political participation and deliberation take place in the context of strategically manipulated information. Opportunities to mobilize data, in order to reinforce manifestations of panic or alarm, are becoming more evident. Concepts such as "information", "agenda-setting " and "participation" are being challenged today by an almost belligerent mobilization of media resources. Recent developments on the recognition of women’s rights and promotion of new affirmative policies intended to improve gender equality coincides with an ever-increasing controversy around the concept of "political correctness". At the same time, while affirmations concerning human dignity appears to be progressively incorporated in political discourse, phenomena such as xenophobia, misogyny, racism, cultural, racial and ethnic confrontation, and, at the limit, the proliferation of genocides, rise to a previously unimaginable proportion and extent. Emphasis was placed on empirical and theoretical works involving relatively recent political debates, such as the creation of the "left majority" (or "geringonça") in Portugal; the Brexit; the Brazilian process; the American elections; the debates on the political correctness, the emergence of illiberal democracies and the political impact of migratory fluxes. Index Part 2 - Leadership, transgression, manipulation and new political campaigns - 9 Deliberative framings and the constitution of “Geringonça”: from media frames to readers’ comments. The case of “Observador” - 11 João Carlos Correia & Ricardo Morais Political communication and electoral strategy in Donald Trump´s Campaign - 37 José Antonio Abreu Colombri The Performance of Power and Citizenship: David Cameron meets the people in the 2016 Brexit campaign - 61 Peter Lunt Hungarian media policy 2010 – 2018: the illiberal shift - 81 Monika Metykova The agri is tech, the agri is pop, the agri is politics: the “rural world” and the rise of the agripolitician in Brazil - 97 Pedro Pinto Oliveira Part 3 - Identities and life politics in a hyper-mediated society - 113 Dystopian fiction as a means of impacting reality and initiating civic commitment among fans: “The Handmaid’s Tale” series case - 115 Marine Malet Australia’s immigration policy and the scapegoating of Lebanese migrants - 127 Mehal Krayem & Judith Betts The construction of feminine, technofeminism and technological paradox - 145 Êmili Adami Rossetti & Renata Loureiro Frade Educational Superavit: Human rights versus Education Policies - 159 Ana S. Moura, João Seixas, M. Natália D. S. Cordeiro & João Barreiros Aylan Kurdi as the awakening image of the refugee crisis:the framework of the Iberian press - 173 Rafael Manganainfo:eu-repo/semantics/publishedVersio

Automatic Dialect and Accent Recognition and its Application to Speech Recognition

A fundamental challenge for current research on speech science and technology is understanding and modeling individual variation in spoken language. Individuals have their own speaking styles, depending on many factors, such as their dialect and accent as well as their socioeconomic background. These individual differences typically introduce modeling difficulties for large-scale speaker-independent systems designed to process input from any variant of a given language. This dissertation focuses on automatically identifying the dialect or accent of a speaker given a sample of their speech, and demonstrates how such a technology can be employed to improve Automatic Speech Recognition (ASR). In this thesis, we describe a variety of approaches that make use of multiple streams of information in the acoustic signal to build a system that recognizes the regional dialect and accent of a speaker. In particular, we examine frame-based acoustic, phonetic, and phonotactic features, as well as high-level prosodic features, comparing generative and discriminative modeling techniques. We first analyze the effectiveness of approaches to language identification that have been successfully employed by that community, applying them here to dialect identification. We next show how we can improve upon these techniques. Finally, we introduce several novel modeling approaches -- Discriminative Phonotactics and kernel-based methods. We test our best performing approach on four broad Arabic dialects, ten Arabic sub-dialects, American English vs. Indian English accents, American English Southern vs. Non-Southern, American dialects at the state level plus Canada, and three Portuguese dialects. Our experiments demonstrate that our novel approach, which relies on the hypothesis that certain phones are realized differently across dialects, achieves new state-of-the-art performance on most dialect recognition tasks. This approach achieves an Equal Error Rate (EER) of 4% for four broad Arabic dialects, an EER of 6.3% for American vs. Indian English accents, 14.6% for American English Southern vs. Non-Southern dialects, and 7.9% for three Portuguese dialects. Our framework can also be used to automatically extract linguistic knowledge, specifically the context-dependent phonetic cues that may distinguish one dialect form another. We illustrate the efficacy of our approach by demonstrating the correlation of our results with geographical proximity of the various dialects. As a final measure of the utility of our studies, we also show that, it is possible to improve ASR. Employing our dialect identification system prior to ASR to identify the Levantine Arabic dialect in mixed speech of a variety of dialects allows us to optimize the engine's language model and use Levantine-specific acoustic models where appropriate. This procedure improves the Word Error Rate (WER) for Levantine by 4.6% absolute; 9.3% relative. In addition, we demonstrate in this thesis that, using a linguistically-motivated pronunciation modeling approach, we can improve the WER of a state-of-the art ASR system by 2.2% absolute and 11.5% relative WER on Modern Standard Arabic

Processing temporal information in unstructured documents

Tese de doutoramento, Informática (Ciência da Computação), Universidade de Lisboa, Faculdade de Ciências, 2013Temporal information processing has received substantial attention in the last few years, due to the appearance of evaluation challenges focused on the extraction of temporal information from texts written in natural language. This research area belongs to the broader field of information extraction, which aims to automatically find specific pieces of information in texts, producing structured representations of that information, which can then be easily used by other computer applications. It has the potential to be useful in several applications that deal with natural language, given that many languages, among which we find Portuguese, extensively refer to time. Despite that, temporal processing is still incipient for many language, Portuguese being one of them. The present dissertation has various goals. On one hand, it addresses this current gap, by developing and making available resources that support the development of tools for this task, employing this language, and also by developing precisely this kind of tools. On the other hand, its purpose is also to report on important results of the research on this area of temporal processing. This work shows how temporal processing requires and benefits from modeling different kinds of knowledge: grammatical knowledge, logical knowledge, knowledge about the world, etc. Additionally, both machine learning methods and rule-based approaches are explored and used in the development of hybrid systems that are capable of taking advantage of the strengths of each of these two types of approach.O processamento de informação temporal tem recebido bastante atenção nos últimos anos, devido ao surgimento de desafios de avaliação focados na extração de informação temporal de textos escritos em linguagem natural. Esta área de investigação enquadra-se no campo mais lato da extração de informação, que visa encontrar automaticamente informação específica presente em textos, produzindo representações estruturadas da mesma, que podem depois ser facilmente utilizadas por outras aplicações computacionais. Tem o potencial de ser útil em diversas aplicações que lidam com linguagem natural, dado o caráter quase ubíquo da referência ao tempo cronólogico em muitas línguas, entre as quais o Português. Apesar de tudo, o processamento temporal encontra-se ainda incipiente para bastantes línguas, sendo o Português uma delas. A presente dissertação tem vários objetivos. Por um lado vem colmatar esta lacuna existente, desenvolvendo e disponibilizando recursos que suportam o desenvolvimento de ferramentas para esta tarefa, utilizando esta língua, e desenvolvendo também precisamente este tipo de ferramentas. Por outro serve também para relatar resultados importantes da pesquisa nesta área do processamento temporal. Neste trabalho, mostra- -se como o processamento temporal requer e beneficia da modelação de conhecimento de diversos níveis: gramatical, lógico, acerca do mundo, etc. Adicionalmente, são explorados tanto métodos de aprendizagem automática como abordagens baseadas em regras, desenvolvendo-se sistemas híbridos capazes de tirar partido das vantagens de cada um destes dois tipos de abordagem.Fundação para a Ciência e a Tecnologia (FCT, SFRH/BD/40140/2007