An empirical study on influencers and their engagement factors: The YouTubers' perspective

The current marketing arena is witnessing that the use of influencers or third-party content-generators is an efficient practice. Adding the fact that one of the arising-stars platforms in the social media spectrum is YouTube, the current research aims to understand how YouTube influencers can contribute to the process of customer engagement. The present research methodology is based on a qualitative approach through in-depth interviews of 22 female Youtubers devoted to the lifestyle categories. The questionnaire was built upon existing literature, aiming to understand what are the engagement factors that influencers should rely on to promote engagement from followers with the focal advertised object (i.e., product, brand). But this time from the Youtubers perspective. From the development of this study, a set of customer engagement factors arise. Based on the results we can claim that having an informal relationship with brands, presenting different content from others in the industry, or having a well-connected relationship with followers are engagement factors that contribute to customer engagement.info:eu-repo/semantics/publishedVersio

How influencers and digital interaction can impact customer-brand relationship and engagement

This research seeks to unveil how YouTube influencers and digital interaction can contribute to the process of customer-brand relationship and engagement. Based on in-depth interviews of female Youtubers devoted to the lifestyle categories, we aim to comprehend the engagement factors that influencers should rely on to promote engagement between their followers and the brands they advocate.info:eu-repo/semantics/publishedVersio

a quantitative approach

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Exponential stability for a nonlinear porous-elastic system with delay

In this work, we consider the existence of global solution and the exponential decay of a nonlinear porous elastic system with time delay. The nonlinear term as well as the delay acting in the equation of the volume fraction. In order to obtain the existence and uniqueness of a global solution, we will use the semigroup theory of linear operators and under a certain relation involving the coefficients of the system together with a Lyapunov functional, we will establish the exponential decay of the energy associated to the system.Comment: Manuscript, 21 page

Avaliação de cultivares de arroz de sequeiro em diferentes épocas de plantio no Território Federal de Rondônia.

Procurou-se identificar cultivares mais produtivas em epocas de plantio mais favoraveis. Os experimentos foram conduzidos nos campos experimentais da EMBRAPA-UEPAT, em Porto Velho e Ouro Preto no periodo de 1976/77, em uma area total de 1.209,60m2. Usou-se o delineamento experimental de blocos casualizados, com tres repeticoes.Nao se conhecia espacamento ideal para o arroz,optando-se por 30 x 30cm. A densidade de plantio foi 5 a 6 sementes por cova, considerando-se a percentagem de germinacao de sementes na ordem de 82% a 95%. Os resultados demonstram que para Porto Velho, as cultivares IAC-1246, A-19, IAC-1131 e Pratao precoce (periodo ideal em fins de out., ate primeira quinzena de nov.), IAC-1246, A-19, IAC-1246 e IAC-1131 (apos segunda quinzena de nov. a inicio de dez.) mostraram-se mais satisfatoria, e com melhores condicoes em produtividade e outras caracteristicas para o agricultor e consumidor. Em Ouro Preto, se destacaram as cultivares IAC-1246(segunda quinzena de out.) e IAC-1131 (no final de nove., com colheita para fisnm de mar.). Sugere-se a continuidade de pesquisa a fim de substituir e introduzir cultivares mais produtivas e melhor adaptaveis.bitstream/item/49913/1/CT-id-11250001.pd

Synthesis and photophysical characterization of novel triphenylamine-benzimidazole derivatives

Research on organic luminescent materials has been intensely pursued due to their importance in technological applications related to signaling, fluorescent biosensory/chemosensory materials, molecular switches and organic light emitting diodes (OLEDs). Organic fluorophores such as triphenylamine and benzimidazole derivatives have attracted a particular attention owing to their high emission efficiency being widely used as electron transporters and emitting layers for OLEDs.1 Recently, we have been investigating the potential of heterocyclic systems bearing functionalized (benz)imidazole derivatives exhibiting high thermal stability, interesting emissive and chemosensory properties.2 In this communication we report the synthesis and photophysical characterization of triphenylamine-benzimidazoles (compounds 1a-d) which were synthesized by a one step reaction through the Na2S2O4 reduction of several commercially available o-nitroanilines in the presence of triphenylamine aldehyde in DMSO at 120 °C. Compounds 1a-d bear different functionalization at position 5 of the benzimidazole with electron-donor or acceptor groups (Figure 1). A comprehensive spectral and photophysical investigation of these compounds including absorption, fluorescence and triplet-triplet absorption spectra, together with quantum yields of fluorescence, internal conversion, intersystem crossing and singlet oxygen and rate constants for the radiative and radiationless processes has been undertaken in solution at room temperature. It is shown that compounds 1a-d exhibit high fluorescence quantum yields (0.70-0.78). Additionally, a comparison between the optical and photophysical properties of 1a-d will be also presented and discussed.Fundação para a Ciência e a Tecnologia (FCT

The origin of power-law distributions in deterministic walks: the influence of landscape geometry

We investigate the properties of a deterministic walk, whose locomotion rule is always to travel to the nearest site. Initially the sites are randomly distributed in a closed rectangular ($A/L \times L)$ landscape and, once reached, they become unavailable for future visits. As expected, the walker step lengths present characteristic scales in one ($L \to 0$) and two ($A/L \sim L$) dimensions. However, we find scale invariance for an intermediate geometry, when the landscape is a thin strip-like region. This result is induced geometrically by a dynamical trapping mechanism, leading to a power law distribution for the step lengths. The relevance of our findings in broader contexts -- of both deterministic and random walks -- is also briefly discussed.Comment: 7 pages, 11 figures. To appear in Phys. Rev.

Desempenho de genótipos de canola (Brassica napus L.) no Nordeste do estado da Paraíba, Nordeste do Brasil.

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Eficiência da ureia revestida com polímeros, na produtividade de milho safrinha.

Em regiões tropicais e principalmente, sob cultivo em sistema de plantio direto, as perdas de N, na forma de NH3, por volatilização aliada à baixa disponibilidade hídrica, estão entre as principais causas de baixa produtividade de milho safrinha. Breda et al. (2010), constataram maior eficiência na utilização de ureia revestida com polímeros, em relação à redução das perdas de NH3 ocasionadas por volatilização. Consequentemente, ocasionando um melhor aproveitamento deste nutriente pelas plantas, podendo gerar incremento de produtividade. Em sistemas de plantio direto, onde há um maior acúmulo de resíduos vegetais na superfície do solo, as perdas de N, na forma de NH3, são maiores em relação a outros sistemas de cultivo, como por exemplo, o plantio convencional (VIERO, 2011). Contudo, o sistema plantio direto na palha, nos proporciona inúmeras vantagens em relação ao cultivo convencional, como por exemplo, menor suscetibilidade a erosão, controle de temperatura do solo, equilíbrio da micro e macro biota do solo, melhor conservação de água, dentre outras. Levando-nos a buscar alternativas eficientes para o seu manejo, principalmente na safrinha, onde estes benefícios são essenciais para o sucesso da lavoura. Diante do disposto acima, o objetivo deste estudo foi, avaliar o efeito da adubação nitrogenada protegida com polímeros, em plantas de milho cultivadas sob sistema de plantio direto, em regime de safrinha.Disponível em: http://www.cpao.embrapa.br/cds/milhosafrinha2013/PDF/61.pdf. Acesso em 18 dez. 2013

Avaliação de cultivares de milho no Território Federal de Rondônia.

Procurou-se identificar melhores cultivares de milho para uso imediato dos agricultores. Os experimentos foram instalados em Ouro Preto, RO, no periodo de 1977/78, com dois ensaios, sendo um de milho normal e outro braquitico. O solo foi do tipo Podzolico Vermelho Amarelo distrofico. Foi feita adubacao mineral de NPK, 60-60-60. Resultados demonstram que as melhores cultivares de milho normal foram: Composto Dentado, Centralmex, Poza Rica e Yousafwala 7428 e Composto A; Milho braquitico: Composto Dentado Brachitico, Piranao e Composto Dentado Braquitico x Composto Flint Braquitico.bitstream/item/46846/1/COT-8-19790001.pd