9,239 research outputs found

    Uniqueness of Lagrangian Self-Expanders

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    We show that zero-Maslov class Lagrangian self-expanders in C^n which are asymptotic to a pair of planes intersecting transversely are locally unique if n>2 and unique if n=2.Comment: 32 page

    Stylised features of price setting behaviour in Portugal: 1992-2001

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    This paper identifies the empirical stylized features of price setting behaviour in Portugal using the micro-datasets underlying the consumer and the producer price indexes. The main conclusions are the following: 1 in every 4 prices change each month; there is a considerable degree of heterogeneity in price setting practices; consumer prices of goods change more often than consumer prices of services; producer prices of consumption goods vary more often than producer prices of intermediate goods; for comparable commodities, consumer prices change more often than producer prices; price reductions are common, as they account for around 40 per cent of total price changes; price changes are, in general, sizeable; finally, the price setting patterns at the consumer level seem to depend on the level of inflation as well as on the type of outlet. JEL Classification: E31, E32, L11consumer prices, frequency of price changes, price setting, producer prices

    A 3-form Gauge Potential in 5D in connection with a Possible Dark Sector of 4D-Electrodynamics

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    We here propose a 5-dimensional {\bf Abelian gauge} model based on the mixing between a U(1)U(1) potential and an Abelian 3-form field by means of a topological mass term. An extended covariant derivative is introduced to minimally couple a Dirac field to the U(1)U(1) potential, while this same covariant derivative non-minimally couples the 3-form field to the charged fermion. A number of properties are discussed in 5D; in particular, the appearance of a topological fermionic current. A 4-dimensional reduced version of the model is investigated and, { \bf in addition to the U(1)U(1) electric- and magnetic-sort of fields,} there emerges an extra set of electric- and magnetic-like fields which contribute a negative pressure and may be identified as a possible fraction of dark energy. The role of the topological fermionic current is also contemplated upon dimensional reduction from 5D to 4D. Other issues we present in 4 space-time dimensions are the emergence {\bf of a pseudo-scalar massive particle,} an extra massive neutral gauge boson,{\bf which we interpret as a kind of paraphoton}, and the calculation of spin- and velocity-dependent interparticle potentials associated to the exchange of the intermediate bosonic fields of the model.Comment: -- 30 pages -- L. P. R. Ospedal appears as a new co-author; modifications by inclusion of the gravitational sector and the attainment of a spin- and velocity-dependent potential as an application have been worked out in this Revised Versio

    A linguagem bi-média no design gráfico

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    A identidade corporativa de uma empresa ou instituição evidencia-se através dos elementos comunicacionais internos e externos, do ambiente de produção e/ou do atendimento que é prestado ao cliente, na apresentação do staff e também através dos estacionários. Neste sentido, a investigação pretende materializar os valores associados à marca IPCB e, assim, permitir delinear vários níveis de estratégia de comunicação corporativa em adequação aos diferentes públicos-alvo. Na metodologia de investigação, numa primeira fase, torna-se necessário fazer uma revisão da literatura, relacionada com a problemática em causa, para clarificar conceitos e adotar métodos. A partir da revisão bibliográfica, determinou-se um conjunto de argumentos a testar e identificaram-se as variáveis e as medidas a tomar para testar esses argumentos. Para testar os argumentos, recorreu-se a uma metodologia de investigação mista: Primeiro, através de observação e análise das campanhas publicitárias de angariação de novos alunos, realizadas anteriormente pelo IPCB, na intenção de avaliar a relação entre imagem e texto. Segundo, através de questionário pretendeu-se a realização de uma auditoria de imagem à presidência, deste instituto. Tudo isso com o objetivo de fundamentar a relação existente entre texto e imagem na publicidade institucional, e quais os valores da marca IPCB presentes na comunidade académica. A análise dos dados resultantes desta metodologia de investigação será qualitativa e poderá resultar num conjunto de diretrizes não fechadas, para que, em futuras campanhas publicitárias, a aplicação da marca IPCB seja feita com maior eficácia, valorizando e solidificando a Imagem institucional. Pretende-se que esta investigação tenha uma aplicabilidade prática na campanha de captação de novos alunos para os cursos do IPCB, nos anos lectivos de 2013/2016. Contribuirá, certamente, para a consolidação da postura institucional no exterior já que, com maior sucesso, se poderão definir linhas estratégicas e determinar objetivos a cumprir, promovendo-se, com isso, uma postura de excelência relativamente à concorrência.ABSTRACT The corporate identity of a company or institution is evidenced through internal and external communication elements, the production environment and / or care that is provided to the customer at the presentation of staff, and also through stationary. In this sense, the research aims to materialize the values associated with the brand IPCB, and allow delineating various levels of corporate communication strategy for adaptation to different target. In research methodology, in a first phase, it is necessary to review the literature related to the issue in question to clarify concepts and adopt methods. From the literature review it was determined a set of hypotheses to be tested and identified the variables and the measures needed to test these hypotheses. To test the hypothesis it was used a mixed research methodology: First, through observation and analysis of advertising campaigns to attract new students, held previously by IPCB, intending to evaluate the relationship between image and text. Second, through questionnaire was intended to carry out an audit (of advertising image) to the presidency of this institute. Therefore, it is sought to substantiate the relationship between text and image in institutional advertising, and what brand values IPCB present in the academic community. The analysis of the data resulting from this research methodology is qualitative and may result in a set of guidelines that are not closed, so that in future advertising campaigns, the implementation of brand IPCB can be done more effectively, enhancing and solidifying the institutional image. It is intended that this research has a practical applicability in the campaign to attract new students to the IPCB courses in the academic years 2013/2016. It will certainly be to consolidate the institutional posture abroad since, with greater success, may be well-defined strategic lines delineate and determine goals to fulfil, promoting thereby a position of excellence over the competition.info:eu-repo/semantics/publishedVersio
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