Structural Flyby Characterization of Nanoporosity

Recently, Ferreira da Silva et al. [3] have performed a gradient pattern analysis of a canonical sample set (CSS) of scanning force microscopy (SFM) images of p-Si. They applied the so-called Gradient Pattern Analysis to images of three typical p-Si samples distinguished by different absorption energy levels and aspect ratios. Taking into account the measures of spatial asymmetric fluctuations they interpreted the global porosity not only in terms of the amount of roughness, but rather in terms of the structural complexity (e.g., walls and fine structures as slots). This analysis has been adapted in order to operate in a OpenGL flyby environment (the StrFB code), whose application give the numerical characterization of the structure during the flyby real time. Using this analysis we compare the levels of asymmetric fragmentation of active porosity related to different materials as p-Si and "porous diamond-like" carbon. In summary we have shown that the gradient pattern analysis technique in a flyby environment is a reliable sensitive method to investigate, qualitatively and quantitatively, the complex morphology of active nanostructures

Control and motivation in task performance of public servants at home office in the face of the COVID-19 pandemic

Objective: To analyze the influence of output control, autonomous motivation, and controlled motivation on task performance of public servants at home office owing to the COVID-19 pandemic. Methodology: Survey research, based on the perception of 236 public servants; Structural Equation Modeling technique was used for data analysis. Results: Both autonomous motivation and output control are positively and significantly related to task performance. Research implications: The present study expands the literature with information about individual performance and management control, which can be related to the control, motivation and task performance of public servants at home office in a pandemic context. Practical implications: The results could offer a basis for understanding how managers can deal with the challenges while at home office. They can also provide managers with information that they can use to build management strategies to foster the performance of public servants at home office. Social implications: Home office can decrease commuting to a central workplace, alleviate traffic problems, and reduce car pollution. It also allows for business continuity in the face of storms and pandemics. Originality: Most studies about home office, COVID-19, and task performance have addressed personal, professional, and organizational characteristics. However, little is known about the analysis of combinations of the following constructs: output control, autonomous and controlled motivations, and how both affect task performance of public servants

Um olhar sobre a formação de professores em Angola

Com o alcançar da paz em 2002, Angola deu continuidade às mudanças educativas iniciadas em 1975, após a independência. Essas mudanças sugerem a introdução de novos materiais, de novas metodologias e, consequentemente, de um novo perfil do professor. Partindo da questão Qual o perfil do professor no pós-independência?, pretende-se caracterizar os futuros professores de Língua Portuguesa, na província do Uíge, definir as suas expetativas face à formação académica e identificar as suas perspetivas sobre a profissão docente. Para o cumprimento destes objetivos, optou-se por uma metodologia de tipo qualitativo e como estratégia de investigação a recolha de fichas de caracterização (inquérito com perguntas abertas), junto de alunos do curso de Língua Portuguesa (ensino superior). A análise de conteúdo destes dados revela um cruzamento entre a identidade e o estado-nação, um estatuto privilegiado na construção da sociedade, um conjunto de dificuldades linguísticas e materiais e o encarar da formação académica como meio para superar essas dificuldades.CEA - UPorto CIED - UMinhoinfo:eu-repo/semantics/publishedVersio

Formar professores de língua portuguesa em contexto multicultural e plurilingue

O presente artigo apresenta uma reflexão sobre a formação e supervisão de professores de português em Angola, a partir da análise de conteúdo de um conjunto de documentos, enquadrada num contexto plurilingue e num cenário de reconstrução e de reforma educativa.CEA - UPorto CIED - UMinhoinfo:eu-repo/semantics/publishedVersio

Do gatekeeping ao gatewatching: impressões sobre papel do jornalista como mediador da informação Trabalho

TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Comunicação e Expressão. Jornalismo.Discutimos nesta monografia a reconfiguração do papel do jornalista como mediador da informação, abordada a partir do conceito de gatekeeping; e a ascensão de práticas de produção colaborativa, abordadas a partir do conceito de gatewatching. Propondo, desta forma, uma reflexão sobre o papel social do jornalista no contexto da internet. A popularização do acesso à internet e às tecnologias digitais nas últimas duas décadas provocou uma transformação na relação entre os meios de comunicação e seu público. Entre as consequências desta conjuntura, destacamos o processo que vem tirando dos jornalistas o monopólio sobre a informação, à medida que permite a participação de novos atores na produção e difusão da notícia

CRISTOFORO COLOMBO versus CRISTÓBAL COLÓN Cristoforo Colombo, the weaver from Genoa, was not Don Cristóbal Colón, the navigator from Iberia

Tese de Doutoramento, História Insular e Atlântica (Séculos XV-XX) (Ciências Sociais e Humanas), 12 de abril de 2023, Universidade dos Açores.ABSTRACT: In the interest of clarity and consistency we will write the navigator’s name, whom the English call Christopher Columbus, as Don Cristóbal Colón (1455?-1506). Colón is the surname he used while living in Castile - see Figure 1. Colón is also the surname utilized for five centuries in all the Spanish-speaking countries, and the surname by which his Spanish descendants are presently known. We will employ this name when quoting texts and only use a different form of the name if it becomes necessary to clarify a document. Therefore, phrases such as “uno che se dimanda Coloma, grandissimo marinaro, nepote del grande Coloma de Francia”1 may be corrected to “uno che se dimanda Colón, grandissimo marinaro, nepote del grande Colombo de Francia.” We will designate the navigator’s two brothers by their Castilian names Bartolomé Colón (1457?-1514) and Diego Colón (1459?-1515). Although Don Cristóbal’s first-born son is called Diego Colón in Spain, we will use his Portuguese name Diogo Colón (1480-1526) to differentiate him from his uncle Diego. As for Don Cristóbal Colón’s other son, we will call him Don Hernando Colón (1488-1539), the name on his tomb in the Cathedral of Seville. In our view, proper names should never be translated and there should be a rule, especially when dealing with surnames, to keep them in their original language format. When a name is translated it ceases to be the person’s actual name and becomes a pseudonym. For example, the Portuguese name Fernão de Magalhães started to be written as Ferdinand Magellan in Spanishspeaking countries and most of the world knows him by this Spanish name. Few know who we are talking about if we call him Fernão de Magalhães, his birth name. It also happens that the modification/translation of names from one language to another does not follow a standard rule. George Washington, the First President of the United States of America, is not usually translated into other languages

Virtual currency: a cointegration analysis between bitcoin prices and economic and financial data

The cryptocurrencies development around the world has been studied and published by the media, speculating on its continuity, applicability and security. The Bitcoin stands out as the virtual currency that has achieved the highest market value to date and for being in circulation for more than 5 years. This study intends to investigate the existence of a dynamic relationship between Bitcoin prices and economic and financial data whose relationship with physical currencies is known or it has been showed in previous studies. This data includes the Crude and Gold prices, the 6-month and 1-year U.S. Treasury Yields and the S&P 500 Index prices. The results of the study suggests that only the 6-month U.S. Treasury Yields presents a long-term relationship with the Bitcoin prices.A criação e crescimento de moedas virtuais pelo mundo têm sido alvo de vários estudos e notícias divulgadas pelos media, especulando-se quanto à sua continuidade, aplicabilidade e segurança. Dessas moedas, destaca-se a Bitcoin, a moeda virtual que apresentou até hoje o maior valor de mercado e que se tem mantido em circulação há mais de 5 anos. O presente estudo tem como objetivo investigar a existência de uma relação dinâmica entre os preços da Bitcoin e indicadores económico-financeiros cuja relação com as moedas físicas é conhecida ou foi demonstrada em estudos anteriores. Esses indicadores são os preços do petróleo e do ouro, as taxas de juro a 6 meses e a 1 ano das obrigações do Tesouro americanas e os valores de fecho do índice S&P 500. Os resultados deste estudo demonstram que apenas as taxas de juro a 6 meses de obrigações do Tesouro americanas apresentam uma relação de longo prazo com as cotações da Bitcoin