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Search Results: 1 - 10 of 545 matches for " Andreia Guerini "
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O trabalho: a chave para a liberdade
Andreia Guerini,Patricia Peterle
Alea : Estudos Neolatinos , 2009, DOI: 10.1590/s1517-106x2009000100015
Structural and Electronic Properties of Impurities on Boron Nitride Nanotube  [PDF]
Gabrielle P. Soares, Silvete Guerini
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.28102
Abstract: The structural and electronic properties of molybdenum and magnesium substitution doping in (10,0) boron nitride nanotube (BNNT), are investigated through first-principle calculations. The electronic band structures results indicate that the molybdenum doped systems behave as n-type impurity. However, the magnesium doped systems behave as p-type impurity when magnesium replaces boron, and as a n-type impurity when the magnesium replaces nitrogen. The analysis of the energies formation shows that the molybdenum replacing a boron and nitrogen atoms are more favorable than the magnesium substitution in boron and nitrogen.
Repensar o futurismo
Andréia Guerini
Alea : Estudos Neolatinos , 2008, DOI: 10.1590/s1517-106x2008000200014
Assessing Sentiment Strength in Words Prior Polarities
Lorenzo Gatti,Marco Guerini
Computer Science , 2012,
Abstract: Many approaches to sentiment analysis rely on lexica where words are tagged with their prior polarity - i.e. if a word out of context evokes something positive or something negative. In particular, broad-coverage resources like SentiWordNet provide polarities for (almost) every word. Since words can have multiple senses, we address the problem of how to compute the prior polarity of a word starting from the polarity of each sense and returning its polarity strength as an index between -1 and 1. We compare 14 such formulae that appear in the literature, and assess which one best approximates the human judgement of prior polarities, with both regression and classification models.
DepecheMood: a Lexicon for Emotion Analysis from Crowd-Annotated News
Jacopo Staiano,Marco Guerini
Computer Science , 2014,
Abstract: While many lexica annotated with words polarity are available for sentiment analysis, very few tackle the harder task of emotion analysis and are usually quite limited in coverage. In this paper, we present a novel approach for extracting - in a totally automated way - a high-coverage and high-precision lexicon of roughly 37 thousand terms annotated with emotion scores, called DepecheMood. Our approach exploits in an original way 'crowd-sourced' affective annotation implicitly provided by readers of news articles from rappler.com. By providing new state-of-the-art performances in unsupervised settings for regression and classification tasks, even using a na\"{\i}ve approach, our experiments show the beneficial impact of harvesting social media data for affective lexicon building.
Deep Feelings: A Massive Cross-Lingual Study on the Relation between Emotions and Virality
Marco Guerini,Jacopo Staiano
Computer Science , 2015,
Abstract: This article provides a comprehensive investigation on the relations between virality of news articles and the emotions they are found to evoke. Virality, in our view, is a phenomenon with many facets, i.e. under this generic term several different effects of persuasive communication are comprised. By exploiting a high-coverage and bilingual corpus of documents containing metrics of their spread on social networks as well as a massive affective annotation provided by readers, we present a thorough analysis of the interplay between evoked emotions and viral facets. We highlight and discuss our findings in light of a cross-lingual approach: while we discover differences in evoked emotions and corresponding viral effects, we provide preliminary evidence of a generalized explanatory model rooted in the deep structure of emotions: the Valence-Arousal-Dominance (VAD) circumplex. We find that viral facets appear to be consistently affected by particular VAD configurations, and these configurations indicate a clear connection with distinct phenomena underlying persuasive communication.
Um filósofo nos meandros da literatura: Agamben e as categorias italianas
Andréia Guerini,Roberto Mulinacci
Alea : Estudos Neolatinos , 2010, DOI: 10.1590/s1517-106x2010000200011
Social Network and Inter-Organizational Learning: The Case of a Brazilian Cooperative of Fish-Farmers  [PDF]
Andreia Maria Kremer, Edson Talamini
Social Networking (SN) , 2013, DOI: 10.4236/sn.2013.22010
Abstract: The inter-organizational learning approach has shown considerable growth in recent years. The concepts of trust and cooperation between individuals present in the New Economic Sociology (NES) approach of social relations emerge with great emphasis and are gaining prominence as a facilitator and propellant mechanism in transferring knowledge inside networks. This study aims to analyze the learning networks formed by fish-farmers organized into a cooperative to identify the characteristics of the network through structural analysis and identification of its critical actors. The study was performed with thirteen fish-farmers of a cooperative headquartered inMundo Novocounty, which is located inMato Grosso do Sulstate in the Midwest region of Brazil. Questionnaires and interviews with closed and open questions were used to collect the data. Measures of centrality (for individuals), density and reciprocity (in relations between individuals) were obtained from ORA software. The findings revealed that experience exchanges between fish-farmers, events participation, meetings attendance, speech audience and technical advice are the main forms of inter-organizational learning. Results suggest that the network has low levels of cohesion and that it is not taking advantage of its full potential. It was also found that there is a subgroup within the network that presents a high level of cohesion and shared learning based on cooperative informal relationships. Grounded in findings, suggestions for future research are presented.
Ispas Andreia
Annals of the University of Oradea : Economic Science , 2012,
Abstract: There is a need for more leadership research in the hotel industry. A reason is the better understanding of the effects and influences that manager-employee relationship can have. Further, this can improve employee performance at their work and clients would be more satisfied. Due to the emergent stage of this field of research, the leadership and employee performance relationship has a lot of potential for being investigated in the context of hotel industry. There are many types of leadership styles recommended to be used in managersa€ daily hotelsa€ activities. The most suggested is transformational leadership. Hotel industry is part of hospitality industry and is providing different services such as accommodation, food nbeverage, entertainment. This makes hotel industry very specific and the hotel products, services unique for each of client. Thata€ s why high standards of organizational performance, a good manager-employee relationship and a high perceived employee performance by the clients are the keys for a long and sustainable business. Leadership is important in getting people to do the right things at their job. More, it helps employee to work better, to be motivated, to strive for excellence and perform beyond expectations. The first objective of this paper is to analyze the main approaches of leadership styles applied in the context of hotel industry studies. The second objective is to explore, from a theoretical point of view, the direct and indirect relationship between leadership style and employee performance based on two mediator factors: job satisfaction and organizational commitment. These two mediators are the most used in organizational researches and have a high degree of validity. The methodology applied is based on documentary study review and critic analysis of the concepts used by the literature. The results of the conceptual paper are: the construction of the conceptual model of scientific research, new approach of the term a€ leadershipa€ in hotel industrya€ s relations. The paper suggests a future research the operationalization of the concepts used in the conceptual model and test them through statistics methods.
Prevalence of sedentary lifestyle, overweight and body image dissatisfaction among adolescents from Florianópolis, SC
Andreia Pelegrini
Revista Brasileira de Cineantropometria e Desempenho Humano , 2009,
Abstract: Objective: Analyze the prevalence of sedentarism lifestyle, overweight and body image dissatisfaction among adolescents and the factors associated with these variables. Methods: This was a cross-sectional study of a representative sample of adolescents aged 14 to 18 years, enrolled in public sector Secondary Education in Florianópolis, SC, Brazil. The following data were recorded: sociodemographic (gender, age, socioeconomic status), anthropometric (body weight, height), perception of body image (real and ideal silhouettes) and level of physical activity (sedentarism lifestyle: < 300 minutes/week). Results: The prevalence of sedentarism lifestyle was 25.4% (male: 21.9%; female: 27.1%, p = 0.177). Among the females, it was found that low weight adolescents and those who spend more than 4 hours/day watching television had 2.69 and 2.25 times greater chance of being sedentary respectively. The prevalence of overweight was 13.9% (male: 13.6%; female: 14.1%, p = 0.860). There was an association between overweight and socioeconomic status, where adolescents living in better economic conditions (class A) demonstrated a 2.7 times greater chance of being overweight with relation to lower economic classes (C+D+E). The proportion of adolescents unsatisfied with body image was 65.5% (male: 72.6%; female: 61.8%, p < 0.001). The results also demonstrated that 48.4% of the female adolescents and 51.3% of the male adolescents wished to reduce or increase their body silhouettes, respectively. Unhealthy BMI was associated with body image dissatisfaction only among the girls (95%CI%=1.35-3.43). Overweight girls exhibited 11 times greater chances of body image dissatisfaction than those with healthy BMI. Conclusion: The sedentarism lifestyle among adolescents is worrying, since it affects one in every four adolescents. For this reason, physical activity programs are recommended during this stage of life. With relation to overweight, interventions with adolescents, particularly those from higher socioeconomic levels, should include nutritional guidance and encourage physical activity. Nutritional status was a decisive factor in body dissatisfaction, primarily among female adolescents, since those with unhealthy nutritional status had higher levels of dissatisfaction than those with healthy BMI.
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