A generalized fuzzy linguistic model for predicting component concentrations in an optical gas sensing system

Motivated by environmental protection concerns, monitoring the flue gas of thermal power plant is now often mandatory due to the need to ensure that emission levels stay within safe limits. Optical based gas sensing systems are increasingly employed for this purpose, with regression techniques used to relate gas optical absorption spectra to the concentrations of specific gas components of interest (NO_x, SO₂ etc.). Accurately predicting gas concentrations from absorption spectra remains a challenging problem due to the presence of nonlinearities in the relationships and the high-dimensional and correlated nature of the spectral data. This article proposes a generalized fuzzy linguistic model (GFLM) to address this challenge. The GFLM is made up of a series of “If-Then” fuzzy rules. The absorption spectra are input variables in the rule antecedent. The rule consequent is a general nonlinear polynomial function of the absorption spectra. Model parameters are estimated using least squares and gradient descent optimization algorithms. The performance of GFLM is compared with other traditional prediction models, such as partial least squares, support vector machines, multilayer perceptron neural networks and radial basis function networks, for two real flue gas spectral datasets: one from a coal-fired power plant and one from a gas-fired power plant. The experimental results show that the generalized fuzzy linguistic model has good predictive ability, and is competitive with alternative approaches, while having the added advantage of providing an interpretable model.

Cyberbullying: estudo da prevalência de comportamentos de cyberbullying e sua relação com vivências de vergonha e estados emocionais negativos

Objectivos: O presente estudo tem como principal objectivo avaliar a prevalência dos comportamentos de cyberbullying, analisando a influência de variáveis sóciodemográficas, e, compreender a sua relação com as vivências de vergonha interna e externa e com os estados emocionais negativos, particularmente a depressão, a ansiedade e o stress. Método: Para a recolha de dados recorreu-se a uma mostra de adolescentes (N=131) a frequentar o 3º ciclo do ensino básico, com idades compreendidas entre os 12 e os 18 anos (M= 13,76; DP= 1,25). O protocolo de avaliação foi constituído por um questionário psicossocial desenvolvido especificamente para este estudo e por um conjunto de medidas fidedignas para avaliar o cyberbullying (CBQ e CBQ-V), a vergonha interna (ISS), vergonha externa (OAS) e os estados emocionais negativos (DASS-21). Resultados: Os nossos dados revelaram que 76 adolescentes (58%) exerceram um qualquer comportamento de cyberbullying (com um predomínio dos rapazes), enquanto 50 adolescentes (38,2%) já foram vítimas de um qualquer comportamento de cyberbullying (com igual proporção entre rapazes e raparigas). Manter lutas e discussões online, usando insultos mediante mensagens electrónicas foi o comportamento praticado mais frequente (30,5%), enquanto o ser removido intencionalmente de um grupo online foi o comportamento sofrido mais frequente (16,1%). A idade e os anos de reprovações mostraram uma associação positiva com os comportamentos de agressão por cyberbullying. Foi ainda analisada a sobreposição entre a execução e a vitimização de comportamentos de cyberbullying, tendo sido discriminados quatro grupos de adolescentes: só agressores (adolescentes que apenas exerceram comportamentos de agressão), só vítimas (apenas sofreram comportamentos de cyberbulling), vítimas e agressores (adolescentes que são simultaneamente agressores e vítimas), e nem vítimas nem agressores (adolescentes que não exerceram nem sofreram qualquer comportamento de cyberbullying). Os resultados evidenciaram que quanto maior a frequência de comportamentos de agressão por cyberbullying, maior a vergonha interna e maior os níveis de stress demonstrados. Por sua vez, quanto maior a frequência de vitimização por cyberbullying, maior a vergonha interna e externa, bem como maior os níveis de ansiedade e stress. Conclusão: Devido a complexidade do fenómeno cyberbullying e seu recente surgimento, serão necessários mais estudos, particularmente longitudinais, para compreender a relação antecedente e/ou consequentes aos comportamentos de cyberbullying entre estados emocionais negativos e as experiências de vergonha. / Objectives: The present study has as main objective to assess the prevalence of cyberbullying behaviours, analyzing the influence of socio demographic variables, and, understand its relationship to the experiences of internal and external shame and negative emotional states, particularly depression, anxiety and stress. Method: For data collection we used a sample of adolescents (N=131) attending the 3rd cycle of basic education, aged between 12 and 18 years (M=13,76; SD=1,25). The evaluation protocol consisted of a psychosocial questionnaire developed specifically for this study and a set of reliable measure to assess cyberbullying (CBQ and CBQ-V), internal shame (ISS), external shame (OAS) and the emotional states negative (DASS-21). Results: Our data indicate that 76 adolescents (58%) exerted any conduct of a cyberbullying (with a predominance of boys), while 50 adolescents (38,2%) had been victims of cyberbullying behaviour of any one (with an equal ratio of boys and girls). Keep fighting and discussions online, through e-mails using insults behaviour was practiced more often (30,5%), while being intentionally removed a group of online behaviour is seen more frequently (16,1%). The age and years of failures were positively associated with the behaviours of aggression by cyberbullying. Was further examined the overlap between enforcement and victimization of cyberbullying behaviours, having been discriminated four groups of adolescents: only aggressors (adolescents who have had only aggressive behaviour), only victims (only suffered cyberbullying behaviours), victims and aggressors (adolescents who are both perpetrators and victims), and neither victims nor aggressors (adolescents who did not exercise any behaviour or suffered cyberbullying). Results showed that the higher the frequency of aggression by cyberbullying behaviour, the greater shame and internal stress levels demonstrated. In turn, the higher the frequency of cyberbullying victimization, the greater the shame internal and external, as well as higher levels of anxiety and stress. Conclusion: Due to the complexity of the phenomenon cyberbullying and its recent emergence, further studies are needed, particularly longitudinal, to understand the relationship between antecedent and/or consequential to cyberbullying behaviours between negative emotional states and experiences of shame.

Tuberculose ocular

Relato de quatro casos de tuberculose ocular presumida, com comprometimento do segmento posterior em três destes casos. Nos dois primeiros casos, relata-se comprometimento do segmento anterior do olho e antecedente de tuberculose, em um caso sistêmica e no outro ocular. No terceiro caso, paciente apresenta lesão coriorretiniana no olho esquerdo. No quarto caso, descrita lesão serpiginosa-like. Os pacientes evoluíram favoravelmente com o tratamento específico. As lesões oculares da tuberculose são diversas e devemos continuar atentos a esta enfermidade.

The art of second wave positive psychology: Harnessing Zen aesthetics to explore the dialectics of flourishing

In recent years, a “second wave” of positive psychology has been emerging, characterised, above all, by an awareness and appreciation of the dialectical nature of flourishing. This paper offers a philosophical foundation for this second wave, based on Eastern philosophy, and, in particular, Zen aesthetics. Part one introduces Zen, including its key philosophical ideas and practices, as well as two antecedent traditions that helped to form it, namely, Buddhism and Taoism. Part two then elucidates three aesthetic principles that are integral to Zen: mono no aware (pathos of life), wabi-sabi (desolate beauty), and yūgen (profound grace). The paper discusses how these principles could be of value to positive psychology in fostering dialectical understanding and appreciation, thus highlighting future directions for the field.

Nanostructured catalysts for the development of the hydrogen economy

La catalyse joue un rôle essentiel dans de nombreuses applications industrielles telles que les industries pétrochimique et biochimique, ainsi que dans la production de polymères et pour la protection de l’environnement. La conception et la fabrication de catalyseurs efficaces et rentables est une étape importante pour résoudre un certain nombre de problèmes des nouvelles technologies de conversion chimique et de stockage de l’énergie. L’objectif de cette thèse est le développement de voies de synthèse efficaces et simples pour fabriquer des catalyseurs performants à base de métaux non nobles et d’examiner les aspects fondamentaux concernant la relation entre structure/composition et performance catalytique, notamment dans des processus liés à la production et au stockage de l’hydrogène. Dans un premier temps, une série d’oxydes métalliques mixtes (Cu/CeO2, CuFe/CeO2, CuCo/CeO2, CuFe2O4, NiFe2O4) nanostructurés et poreux ont été synthétisés grâce à une méthode améliorée de nanocasting. Les matériaux Cu/CeO2 obtenus, dont la composition et la structure poreuse peuvent être contrôlées, ont ensuite été testés pour l’oxydation préférentielle du CO dans un flux d’hydrogène dans le but d’obtenir un combustible hydrogène de haute pureté. Les catalyseurs synthétisés présentent une activité et une sélectivité élevées lors de l’oxydation sélective du CO en CO2. Concernant la question du stockage d’hydrogène, une voie de synthèse a été trouvée pour le composét mixte CuO-NiO, démontrant une excellente performance catalytique comparable aux catalyseurs à base de métaux nobles pour la production d’hydrogène à partir de l’ammoniaborane (aussi appelé borazane). L’activité catalytique du catalyseur étudié dans cette réaction est fortement influencée par la nature des précurseurs métalliques, la composition et la température de traitement thermique utilisées pour la préparation du catalyseur. Enfin, des catalyseurs de Cu-Ni supportés sur silice colloïdale ou sur des particules de carbone, ayant une composition et une taille variable, ont été synthétisés par un simple procédé d’imprégnation. Les catalyseurs supportés sur carbone sont stables et très actifs à la fois dans l’hydrolyse du borazane et la décomposition de l’hydrazine aqueuse pour la production d’hydrogène. Il a été démontré qu’un catalyseur optimal peut être obtenu par le contrôle de l’effet bi-métallique, l’interaction métal-support, et la taille des particules de métal.

Tuberculose ocular

Relato de quatro casos de tuberculose ocular presumida, com comprometimento do segmento posterior em três destes casos. Nos dois primeiros casos, relata-se comprometimento do segmento anterior do olho e antecedente de tuberculose, em um caso sistêmica e no outro ocular. No terceiro caso, paciente apresenta lesão coriorretiniana no olho esquerdo. No quarto caso, descrita lesão serpiginosa-like. Os pacientes evoluíram favoravelmente com o tratamento específico. As lesões oculares da tuberculose são diversas e devemos continuar atentos a esta enfermidade.

An explanation of consumer trust recovery in a food retailer

An organization trusted by consumers enjoys a number of benefits. Unfortunately, instances of trust-damaging events involving organizations happen often. Damaged consumer trust in an organization has numerous negative consequences for the organization and for consumers. Currently, there is a paucity of theory about consumer trust recovery. So, understanding why and how consumer trust recovery occurs is timely, and theoretically and practically relevant. However, the findings from this study suggest that we need to distinguish between two kinds of consumer trust recovery. The first (I call it unconscious consumer trust recovery) refers to trust recovery that occurs without the consumer being fully conscious of it. In other words, a consumer is aware of their damaged trust during the scandal, but is not aware that their trust in the organization has improved. The consumer does not think about his or her recovered trust, just as they did not think about their level of trust before the scandal. The consumer trust is habitual. The second (I call it conscious consumer trust recovery) refers to an improvement in damaged trust where the consumer is fully conscious of their trust recovery. In other words, in conscious trust recovery the consumer is aware that the scandal damaged their trust in the organization. Also, after the scandal, in contrast to unconscious trust recovery, in conscious trust recovery the consumer is also fully aware that he trusts the organization as much or more than during the scandal. My aim is to inductively develop a theory explaining each type of consumer trust recovery. To do so, I use Charmazian grounded theory methodology, because this methodology is developed for theory-building from data and is aligned with the philosophical underpinnings of this study. The empirical context for this study is the meat adulteration scandal (“the horse meat scandal”) in 2013 in the UK. I collect and analyse empirical data about both types of trust recovery in an organization from 31 consumers that experienced both types. My analysis shows that when consumers perceive the scandal as less important, they experience unconscious trust recovery. This happens because the reduced importance of the scandal leads to a shift in consumers’ attention, which in turn leads to their inattentiveness to the scandal. Consumer inattentiveness is an immediate antecedent of unconscious trust recovery. Conscious consumer trust recovery occurs because consumers see cues indicating to them that the food retailer has improved product control systems, which in turn leads to consumer perceptions of the organization’s renewed ability. Consumer perception of renewed ability is an immediate antecedent of their conscious trust recovery. My findings lead me to make three main theoretical contributions to the theory of trust recovery in general and to consumer trust recovery in particular. The first contribution lies in showing that there are two types of consumer trust recovery in an organization, not one, as previously conceptualised, and that the same consumers can experience both types. The second contribution is a theory of unconscious consumer trust recovery in an organization that involves three concepts: consumers’ perceived importance of the scandal, consumers’ shift of attention, and consumer inattentiveness. The third contribution is the finding that conscious recovery of consumer trust occurs even when existing theory of trust recovery would predict that it would not. This study can help managers aiming to repair consumer trust in an organization by identifying a set of antecedents and underlying mechanisms that can guide such trust repair.

A influência da idade, do género e da sabedoria na ansiedade face à morte dos adultos idosos

Constatado que não havia sido estudada a relação entre a Sabedoria e a Ansiedade Face à Morte (AFM) em adultos idosos, os objectivos deste trabalho consistiram na validação da versão portuguesa da Self Assessed Wisdom Scale (SAWS; Webster, 2003) e no estudo da relação entre essas variáveis e delas com a idade e o género. Usou-se também a versão portuguesa da Revised Death Anxiety Scale (RDAS; Thorson & Powell, 1994) validada para a população idosa por Carvalho, Diniz e Ribeiro (2008). Os 397 participantes (leque etário = 65-97 anos; M = 74) que voluntariamente colaboraram no estudo eram residentes na comunidade. Recorrendo à análise factorial confirmatória (LISREL8.53), a estrutura pentadimensional oblíqua da SAWS apresentou boa validade discriminante em todas as dimensões, e uma boa consistência interna e validade convergente apenas em três delas. No segundo estudo, foi testado o Modelo Preditor da AFM em Adultos Idosos, em que a idade (terceira vs. quarta idade) e o género foram tidos como antecedentes das dimensões Experiência de Vida e Reminiscência e Reflexividade da Sabedoria e também da AFM. Verificou-se que a idade e a Reminiscência e Reflexividade foram as únicas boas preditoras da AFM.

Raciocínio contrafactual e modelos mentais

A ideia central deste estudo é de que «... raciocinar sobre factos e raciocinar sobre possibilidades e impossibilidades, baseia-se nos mesmos tipos de representações mentais e processos cognitivos» (Byrne, 1997, p. 107). Quer dizer que as pessoas raciocinam através da construção e revisão de modelos mentais (e.g., Johnson-Laird, Byrne, 1991). As condicionais contrafactuais requerem que os raciocinadores tenham em mente não apenas o que é suposto ser verdadeiro, mas também o que é supostamente verdadeiro mas factualmente falso (Byrne, 1997, p. 117; cf. Johnson-Laird, Byrne, 1991, pp. 72- -73). E a hipótese de que a representação inicial de uma condicional contrafactual é mais explícita do que a de uma condicional factual, permite prever que as inferências Modus Tollens e Negação do Antecedente deverão ser feitas com maior frequência a partir das condicionais contrafactuais do que das factuais. Byrne e Tasso (in press) encontraram evidência para esta hipótese. No estudo que apresentamos, também procuramos replicar esses resultados encontrados por Byrne e Tasso, e acrescentamos algumas hipóteses relacionadas com as latências para compreender os dois tipos de condicionais, e para escolher a conclusão. Utilizamos condicionais neutras do tipo «Se houve um círculo, então houve um triângulo», e apresentamos aos participantes os quatro silogismos condicionais no programa SUPERLAB.

Cidadania organizacional na perspectiva dos direitos e deveres e sua relação com justiça e estresse organizacional

Tese (doutorado)—Universidade de Brasília, Instituto de Psicologia, Departamento de Psicologia Social e do Trabalho, Programa de Pós-Graduação em Psicologia Social, do Trabalho e das Organizações, 2016.

Aplicação de Sistema de Informações Geográficas na análise espacial de doenças do milho no Brasil.

This study presents an application of the geographical information system technology on plant disease involving a multidisciplinary teamwork of geoprocessing and physiopathology specialists. The spatial analysis tools in a GIS were used to evaluate the spatial distribution of two diseases of maize in Brazil: polysora rusl caused by Puccinia polysora and tropical rust caused by Physopella zeae. A database of cIimate variables (mean temperature. relative humidity. and leaf wetness duration) of cIimatological normal from 1961-1990 was obtained and then related it to a mathematical model of disease development (polysora rust) and to the cIimate intervals (tropical rust) in order to obtain the maps. The choice of the model or the favorable climate interval is the important chalIenge of the method because the difficulty of adequacy to the spatial and temporal scales for the specific application. The major incidence of both disease occurred in almost alI the North region from January to June. although this region has traditionalIy a low production of maize. Considering the biggest producers regions. for both the diseases, favorable areas are located in part of Mato Grosso, Tocanlins. Minas Gerais; Mato Grosso do Sul. and coastal areas of São Paulo, Paraná, and Santa Catarina. varying among the dilferent months from January to June. The method allowed making an adequate distinction of the states and the months considered.

Development of advanced catalytic systems for the selective hydrogenolysis of biomass-derived polyols

195 p.

História de aprendizagem e seus contextos : uma análise comportamental das aquisições corporativas

Tese (doutorado)—Universidade de Brasília, Faculdade de Economia, Administração e Contabilidade, Programa de Pós-Graduação em Administração, 2016.

Long-term Success of Family Firms: Investigating Specific Aspects of Firm-level Entrepreneurship and Individual-level Antecedents

Long-term success of family firms is of utmost social and economic importance. Three of its determinants are in the center of this Dissertation: firmlevel entrepreneurial orientation (EO), managers' entrepreneurial behavior, and value-creating attitudes of non-family employees. Each determinant and respective research gaps are addressed by one paper of this cumulative dissertation. Referring to firm-level EO, scholars claim that EO is a main antecedent to firms' both short- and long-term success. However, family firms seem to be successful across generations despite rather low levels of EO. The first paper addresses this paradox by investigating EO patterns of long-lived family firms in three Swiss case studies. The main finding is that the key to success is not to be as entrepreneurially as possible all the time, but to continuously adapt the EO profile depending on internal and external factors. Moreover, the paper suggest new subcategories to different EO dimensions. With regard to entrepreneurial behavior of managers, there is a lack of knowledge how individual-level and organizational level factors affect its evolvement. The second paper addresses this gap by investigating a sample of 403 middle-level managers from both family and non-family firms. It introduces psychological ownership of managers as individual-level antecedent and investigates the interaction with organizational factors. As a central insight, management support is found to strengthen the psychological ownership-entrepreneurial behavior relationship. The third paper is based on the fact that employees' justice perceptions are established antecedents of value-creating employee attitudes such as affective commitment and job satisfaction. Even though family firms are susceptible to nonfamily employees´ perceptions of injustice, corresponding research is scarce. Moreover, the mechanism connecting justice perceptions and positive outcomes is still unclear. Addressing these gaps, the analysis of a sample of 310 non-family employees reveals that psychological ownership is a mediator in the relationships between distributive justice perceptions and both affective commitment and job satisfaction. Altogether, the three papers offer valuable contributions to family business literature with respect to EO, entrepreneurial behavior, and value-creating employee attitudes. Thus, they increase current understanding about important determinants of family firms' long-term success, while opening up numerous ways of future research.

Relação entre impacto de um treinamento gerencial no trabalho, desejabilidade social, suporte a transferência e características dos respondentes

Dissertação (mestrado)—Universidade de Brasília, Faculdade de Economia, Administração e Contabilidade, Programa de Pós-Graduação em Administração, 2016.