Els usuaris d’equipaments aquàtics: aportacions a l’àmbit de la gestió esportiva

La rellevància adquirida per les pràctiques físiques aquàtiques justifica investigacions sobre el públic usuari de piscines cobertes. La mostra es va conformar amb 215 subjectes als quals se’ls va administrar un qüestionari. L’objectiu principal d’aquest estudi va ser analitzar el perfil dels usuaris i les seves percepcions respecte a aquestes instal·lacions. Es van detectar canvis a nivell demogràfic relatius al gènere i l’edat del públic usuari respecte a altres publicacions prèvies. A més a més, han estat constatades aportacions sobre la forma d’ús de l’espai aquàtic, la participació en activitats aquàtiques organitzades i el mitjà de transport per acudir a la instal·lació, entre altres aspectes. Els resultats de l’estudi reverteixen directament en la gestió i el funcionament de les piscines cobertes

Los usuarios de equipamientos acuáticos: aportaciones al ámbito de la gestión deportiva

La relevancia adquirida por las prácticas físicas acuáticas justifica investigaciones sobre el público usuario de piscinas cubiertas. La muestra se conformó con 215 sujetos a quienes se les administró un cuestionario. El objetivo principal de este estudio fue analizar su perfil y percepciones respecto a estas instalaciones. Se detectaron cambios a nivel demográfico relativos al género y la edad del público usuario respecto a otras publicaciones previas. Además, han sido constatadas aportaciones sobre la forma de uso del espacio acuático, la participación en actividades acuáticas organizadas y el medio de transporte para acudir a la instalación, entre otros aspectos. Los resultados del estudio revierten directamente en la gestión y el funcionamiento de las piscinas cubiertas

Enhancing image contrast using coherent states and photon number resolving detectors

We experimentally map the transverse profile of diffraction-limited beams using photon-number-resolving detectors. We observe strong compression of diffracted beam profiles for high detected photon number. This effect leads to higher contrast than a conventional irradiance profile between two Airy disk-beams separated by the Rayleigh criterion.Comment: 7 pages, 3 figures, accepted for publication in Optics Expres

Non-communicating hydrocephalus from pork tapeworm obstructing the foramina of Monro and its endoscopic management; a case report from Europe

Introduction: Taenia solium is the main causative agent of neurocysticercosis. The tapeworm can manifest inside the ventricles, usually in the form of intracranial hypertension. We present a case of hydrocephalus as a result of a neurocysticercosis lesion obstructing both foramina of Monro. Research question: A comprehensive review of the management is provided, as well as video footage (an invaluable resource to compare, critique and learn with other institutions). Material and methods: A 23-year-old female from Honduras presented with a 7-day complaint of headache. On exam, she was hyperreflexic, but otherwise normal. Magnetic resonance imaging (MRI) revealed a non-specific lesion at the level of the foramina of Monro, with associated hydrocephalus. Additional testing was normal. Results: The patient underwent an endoscopic ventriculoscopy with partial excision of the lesion and subsequent implantation of a ventriculoperitoneal shunt. On postoperative MRI, hydrocephalus resolved and pathological analysis identified the parasite as Taenia solium. Albendazole was administered for 14 days. Discussion and conclusion: Neurocysticercosis should be considered in patients presenting with hydrocephalus, especially those from endemic areas. The long-term prognosis of ventricular neurocysticercosis might be favourable, provided that adequate care is given timely. Endoscopic surgery seems to be effective for the removal of parasitic lesions. However, studies comparing open versus endoscopic surgery are lacking. The majority of cases in the literature correspond to America and Asia. This case shows that neurocysticercosis is also present in Europe, and that a high index of suspicion is necessar

Two-photon diffraction and quantum lithography

We report a proof-of-principle experimental demonstration of quantum lithography. Utilizing the entangled nature of a two-photon state, the experimental results have bettered the classical diffraction limit by a factor of two. This is a quantum mechanical two-photon phenomenon but not a violation of the uncertainty principle.Comment: 5 pages, 5 figures Submitted to Physical Review Letter

A reforma do PER

A presente dissertação, de seu tema “A Reforma do PER”, é elaborada no âmbito do segundo ano do Mestrado em Ciências Jurídico-Forenses, lecionado na Faculdade de Direito da Universidade de Lisboa. A dissertação tem como objetivo a compreensão do Direito da Insolvência em Portugal e o estudo da recente reforma do Código da Insolvência e da Recuperação de Empresas, em especial, as alterações introduzidas ao regime do Processo Especial de Revitalização e a criação de um Processo Especial para o Acordo de Pagamento, levadas a cabo pelo Decreto-Lei nº 79/2017, de 30 de junho. Para atingir estes objetivos, a dissertação está dividida em quatro partes. O primeiro capítulo aborda a evolução história dos mecanismos de recuperação, de modo a que se possa compreender como é que a recuperação de empresas foi considerada uma prioridade em detrimento da insolvência; o segundo capítulo foca-se no regime urgente do Processo Especial de Revitalização, no seu desenvolvimento e nos seus trâmites legais, tendo sido desenvolvidos os tópicos relativos ao âmbito de aplicação subjetivo e objetivo; o terceiro capítulo cinge-se a uma análise pormenorizada do novo Processo Especial para Acordo de Pagamento; por último, o quarto capítulo analisa a forma com que a reforma do Processo Especial de Revitalização foi relevante e contribuiu para o crescimento da economia nacional.This paper, under the topic “Reform of the Special Revitalization Process (P.E.R.)”, is a requirement for the fulfillment of the second semester of the Forensic Sciences Master’s Degree at the University Lisbon School of Law. The paper’s purpose is the understanding of the Portuguese Insolvency Law, more specifically, the study of the recent amendment of the Portuguese Insolvency and Corporate Recovery Code (C.I.R.E.), with special emphasis on the changes introduced to the PER system and the creation of a Special Process for Payment Arrangements (P.E.A.P.), regulated under the decree law nº 79/ 2017, of the 30th of June. The paper is divided into four chapters. Chapter One concerns the history of recovery mechanisms, for further understanding on why corporate recovery has been given a higher priority than insolvency. Chapter Two is about development and PER legal proceedings, emphasizing on the scope of subjective and objective enforcement. Chapter Three is a detailed study of the new PEAP. Lastly, Chapter Four describes how the PER Reform was relevant and contributed to the growth of national economy

Generation of Entangled N-Photon States in a Two-Mode Jaynes-Cummings Model

We describe a mathematical solution for the generation of entangled N-photon states in two field modes. A simple and compact solution is presented for a two-mode Jaynes-Cummings model by combining the two field modes in a way that only one of the two resulting quasi-modes enters in the interaction term. The formalism developed is then applied to calculate various generation probabilities analytically. We show that entanglement, starting from an initial field and an atom in one defined state may be obtained in a single step. We also show that entanglement may be built up in the case of an empty cavity and excited atoms whose final states are detected, as well as in the case when the final states of the initially excited atoms are not detected.Comment: v2: 5 pages, RevTeX4, minor text changes + 1 figure added, revised version to be published in PRA, May 200

Two-Photon Interferometry for High-Resolution Imaging

We discuss advantages of using non-classical states of light for two aspects of optical imaging: creating of miniature images on photosensitive substrates, which constitutes the foundation for optical lithography, and imaging of micro objects. In both cases, the classical resolution limit given by the Rayleigh criterion is approximately a half of the optical wavelength. It has been shown, however, that by using multi-photon quantum states of the light field, and multi-photon sensitive material or detector, this limit can be surpassed. We give a rigorous quantum mechanical treatment of this problem, address some particularly widespread misconceptions and discuss the requirements for turning the research on quantum imaging into a practical technology.Comment: Presented at PQE 2001. To appear in Special Issue of Journal of Modern Optic

Entangled-State Lithography: Tailoring any Pattern with a Single State

We demonstrate a systematic approach to Heisenberg-limited lithographic image formation using four-mode reciprocal binominal states. By controlling the exposure pattern with a simple bank of birefringent plates, any pixel pattern on a $(N+1) \times (N+1)$ grid, occupying a square with the side half a wavelength long, can be generated from a $2 N$-photon state.Comment: 4 pages, 4 figure