Obesidad, nutrición y actividad física

La cantidad y calidad de actividad física se ha reducido considerablemente en la sociedad actual. El desequilibrio que se produce cuando el consumo de alimentos supera el gasto energético conlleva un aumento de peso corporal y consecuentemente de la obesidad. Varios son los factores determinantes de la obesidad, así como sus consecuencias. Para tratar una persona obesa es necesario conocer, en primer lugar, el agente desencadenante de la enfermedad. Los profesores de Educación Física, junto con las aportaciones de los profesionales de otras áreas de las ciencias del deporte, pueden ser de vital importancia para ayudar a los niños, niñas y adolescentes con problemas causados por el exceso de peso corporal

Pemphigus Vulgaris - A Pediatric Case

O Pênfigo Vulgar é uma doença auto-imune rara na infância,com evolução crónica e mortalidade significativa. A doença manifesta-se por lesões vesiculares, semelhantes a infecções benignas, mas que são refractárias ao tratamento sintomático e persistem após a fase aguda. Apresenta-se o caso de uma criança de três anos com lesões muco-cutâneas orais, persistentes. A biópsia permitiu o diagnóstico de Pênfigo Vulgar, tendo sido iniciada terapia corticosteróide sistémica. A dificuldade no controlo da doença levou à introdução de outros fármacos imunossupressores, até se atingir a estabilidade clínica. Todas as opções de tratamento do Pênfigo apresentam efeitos iatrogénicos, sendo imprescindível um equilíbrio entre controlo da doença e qualidade de vida do doente

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

Does it still hold?

publishersversionpublishe

Coherent Superposition States as Quantum Rulers

We explore the sensitivity of an interferometer based on a quantum circuit for coherent states. We show that its sensitivity is at the Heisenberg limit. Moreover we show that this arrangement can measure very small length intervals

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

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

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