16 resultados para Álvarez Espriella, Manuel


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Fecha: 15-3-1935 (>1970 reproducción) / Unidad de instalación: Carpeta 25 - Expediente 23-2 / Nº de pág.: 1 (mecanografiada)

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Fecha: 29-9-1947 / Unidad de instalación: Carpeta 25 - Expediente 23-4 / Nº de pág.: 1 (mecanografiada)

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Fecha: 1974 / Unidad de instalación: Carpeta 48 - Expediente 8-6 / Nº de pág.: 3 (mecanografiadas)

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Fecha: 21-3-1940 (>1970 copia) / Unidad de instalación: Carpeta 45 - Expediente 2-14 / Nº de pág.: 4 (mecanografiadas)

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[ES] Información sobre este proyecto ha servido de base a los siguientes artículos:

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[ES]La documentación geométrica y la representación de edificios con el objetivo de servir como base a estudios históricos o arquitectónicos ofrece una variada oferta metodológica, cada una de ellas con unas características específicas. Antes de acometer una documentación, es necesario realizar un análisis previo de las necesidades finales del trabajo para elegir el método de documentación más conveniente.

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[ES] El área de trabajo ocupa unos 60 x 60 metros y está situada en la cima del monte Aitz Txiki (Astxiki) en la que se aprecian algunos restos de muros y un aljibe, pertenecientes a una construcción defensiva.

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[ES] El conjunto está formado por la torre de Martiartu (de unas 16 x 16 metros de planta), la pequeña ermita de la San Antonio y el área circundante.

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Raquel Merino Álvarez, José Miguel Santamaría, Eterio Pajares (eds.)

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4 cartas (manuscritas) ; entre 210x260mm y 150x200mm

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Quantum information provides fundamentally different computational resources than classical information. We prove that there is no unitary protocol able to add unknown quantum states belonging to different Hilbert spaces. This is an inherent restriction of quantum physics that is related to the impossibility of copying an arbitrary quantum state, i.e., the no-cloning theorem. Moreover, we demonstrate that a quantum adder, in absence of an ancillary system, is also forbidden for a known orthonormal basis. This allows us to propose an approximate quantum adder that could be implemented in the lab. Finally, we discuss the distinct character of the forbidden quantum adder for quantum states and the allowed quantum adder for density matrices.

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Background: The aims of this study were to evaluate the prevalence of HIV and its associated demographic and clinical factors among psychiatric inpatients of a general hospital. Methods: This was a single-center, observational, cross-sectional study that included patients consecutively admitted to our unit aged 16 years or older and with no relevant cognitive problems. The patients were evaluated using a semistructured interview and an appropriate test for HIV infection. Results: Of the 637 patients who were screened, 546 (86%) who consented to participate were included in the analyses. Twenty-five (4.6%, 95% confidence interval [CI] 3.0-6.8) patients were HIV-positive. The prevalence was higher among patients with substance misuse (17.4%, 95% CI 9.7-28.8). All except one of the 25 patients knew of their seropositive condition prior to participation in the study. Only 14 (56%) of the 25 seropositive patients had previously received pharmacological treatment for their infection. According to the multiple logistic regression analysis, the likelihood of HIV infection was lower in patients with higher levels of education and higher among patients who were single, had history of intravenous drug use, and had an HIV-positive partner, particularly if they did not use condoms. Among the patients with HIV infection, 18 (72%) had a history of suicide attempts compared with 181 (34.7%) of the patients without HIV infection (relative risk 2.1, 95% CI 1.6-2.7; P<0.001). Conclusion: HIV infection is highly prevalent in patients admitted to a psychiatric unit, especially those with a diagnosis of substance misuse. Seropositive patients show very poor treatment adherence. The risk of suicide seems to be very high in this population. Implementing interventions to reduce the suicide risk and improve adherence to antiretroviral therapy and psychotropic medications seems crucial.

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We propose a bio-inspired sequential quantum protocol for the cloning and preservation of the statistics associated to quantum observables of a given system. It combines the cloning of a set of commuting observables, permitted by the no-cloning and no-broadcasting theorems, with a controllable propagation of the initial state coherences to the subsequent generations. The protocol mimics the scenario in which an individual in an unknown quantum state copies and propagates its quantum information into an environment of blank qubits Finally, we propose a realistic experimental implementation of this protocol in trapped ions.