Duality and Dimensional Reduction of 5D BF Theory

A planar boundary introduced \`a la Symanzik in the 5D topological BF theory, with the only requirement of locality and power counting, allows to uniquely determine a gauge invariant, non topological 4D Lagrangian. The boundary condition on the bulk fields is interpreted as a duality relation for the boundary fields, in analogy with the fermionization duality which holds in the 3D case. This suggests that the 4D degrees of freedom might be fermionic, although starting from a bosonic bulk theory. The method we propose to dimensionally reduce a Quantum Field Theory and to identify the resulting degrees of freedom can be applied to a generic spacetime dimension.Comment: 13 pages, plain LaTeX, version to appear on EPJ

Financial and fiscal interaction in the Euro area crisis : this time was different

This paper highlights the anomalous characteristics of the Euro Area `twin crises' by contrasting the aggregate macroeconomic dynamics in the period 2009-2013 with the business cycle fluctuations of the previous decades. We report three stylised facts. First, the contraction in output was marked by an anomalous downfall in investment, while consumption, savings and unemployment followed their historical relation with GDP. Second, households' and financial corporations' debts, and house prices deviated from their pre-crisis trends. Third, the jump in the public deficit-GDP ratio in 2008-2009 was unprecedented and so was the fiscal consolidation that followed. Our analysis points to the financial nature of the crisis as a likely explanation for these facts. Importantly, the `anomaly' in public deficit is in large part explained by extraordinary measures in support of the financial sector, which show up in the stock-flow adjustments and reveal a key interaction between the fiscal and the financial sectors

„The Master”, l’opera lirica basata sull’omonimo romanzo di Colm Tóibín, musica di Alberto Caruso, libretto di Colm Tóibín

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Essays in applied macroeconomics

1. The impact of macroeconomic news on the euro-dollar exchange rate. 2. Nowcasting Mexican GDP.1. The impact of macroeconomic news on the euro-dollar exchange rate. 2. Nowcasting Mexican GDP.LUISS PhD Thesi

Professional vision in fashion design: practices and views of teachers and learners

Professional vision is a key skill in visually-oriented professions, but its relevance to vocational education and training has only drawn limited attention from researchers. When educating fashion designers, professional vision is vital because precisely analysing clothing is required to create good products suitable for customers. In this study, we investigate what visual information must be observed in fashion design and how the professional vision of teachers and learners differs. Semi-structured interviews targeting the visual information that should be observed in fashion design were conducted with 10 teachers and 71 of their students (the latter in groups) and subjected to content analysis. Additionally, tests involving identifying and correcting clothing defects were administered to 9 of these teachers and 132 learners across three years of training to examine how looking at clothing differs between teachers and learners. Finally, two [4 by 1] ANOVAs with the level of training as the between-groups factors were conducted to examine the differences in the total number of defects identified and the number of accurate corrections suggested. Together, the quantitative and qualitative data show that professional vision in fashion design is a multifaceted skill that takes time to develop. Professional vision enables identifying the 1) different details and patterns needed to reproduce a garment; 2) defects in manufacturing, quality, and wearability; and 3) characteristics of the customer’s body. The findings also suggest that as fashion designers develop their skills, they cease looking at the surface features of clothing and adopt a more holistic and integrated approach that considers how a final garment could be realised for specific clients

Design of a Network with wireless sensor applied to data transmission based on IEEE 802.15.4 standard

The problem of data transmission in wireless sensor networks (WSN), with real time guarantees, is an issue that has important references in the international scientific community, but that still does not have a solution that can completely satisfy this requirement [1]. Therefore, real time data transmission with WSN is considered an open issue with many possibilities of improvement. In this sense, this document presents a new procedure to ensure this type of transmission with WSN, particularly from the planning of the resources available for data transmission in the network, taking as a reference the IEEE 802.15.4 standard

Artificial techniques applied to the improvement of the previous signals in the power amplifiers

A rapid evolution in electronic systems has been experienced in recent years, and one of the fields where this development has been notorious is the telecommunication systems in which users demand more and better services and with higher data transfer speeds. This has generated the need to develop new devices, algorithms and systems that manage to satisfy the requirements demanded y new technologies. An example of the above is the front-end of telecommunication systems. Systems need to be more efficient, but some elements of the systems, as the power amplifier, present nonlinearity when operating in its most efficient region, causing that it has to make a commitment between efficiency and linearity. This paper presents a comparison of different artificial neural network architectures, as a behavioral modeling method, to perform digital predistortion of power amplifiers

An Updated Review of Cribriform Carcinomas with Emphasis on Histopathological Diagnosis and Prognostic Significance

Cribriform is a histopathological term used to describe a neoplastic epithelial proliferation in the form of large nests perforated by many quite rounded different-sized spaces. This growth pattern may be seen in carcinomas arising in different organs, and shows important prognostic implications. Therefore, recent data in literature suggest that cribriform carcinoma is a histologically and clinically distinctive type of tumour that should be separated from other similar tumour types. In this article, the pathology of cribriform adenocarcinoma of the prostate, lung, breast, stomach, colon, thyroid, and skin is discussed with particular reference to morphologic and immunohistochemical features, differential diagnosis, and clinical behaviour