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1
tesis de maestría
The control of the Orbital Angular Momentum (OAM) of light in quantum optical system can provide an additional degree of freedom, that can enable many applications in quantum mechanics and optical communications. Lasers beams with OAM (optical vortices) are generally described by Laguerre-Gaussian modes, which have a doughnut intensity distribution with phase singularities in the wavefront. In the special case of first order OAM modes, the Poincaré sphere gives a convenient geometrical representation of those optical vortices. Following the theoretical proposal done by B.Coutinho dos Santos et. al in 2007, in this project we are interested in studying experimentally the dynamics of an Optical Parametric Oscillator under the injection of a seed beam with OAM. The main aim of this project is to characterize the OAM conservation in the twin beams, namely signal and idler, coming from the i...
2
tesis de maestría
Publicado 2016
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In nature, vibrissae are tactile hairs of mammals used as sensor elements for the exploring the surrounding area. These hairs, also known as whiskers, can be found in different locations on an animals body. Mystacial vibrissae are distributed over a whiskerpad on a muzzle. Carpal vibrissae are located on the downside aspect of the forelimbs of mammals. The vibrissal hair has a conical shape and grows from a special heavily innervated hair follicle incorporating a capsule of blood. As the hair itself has no receptors along its length, the vibrissa may be considered as a system for transmitting forces and torques that arise from the contact between the hair and an object to sensory receptors inside the follicle. The present thesis deals with the vibrational motion of vibrissae dur- ing natural exploratory behaviour from the mechanical point of view. The phenomenon of the parametric resonan...
3
tesis de maestría
El control del Momento Angular Orbital (OAM por sus siglas en inglés) de la luz en sistemas óptico cuánticos puede proveernos de un grado adicional de libertad, lo cual nos puede permitir muchas aplicaciones en mecánica cuántica y tecnologías de la comunicación que tengan como eje central la óptica en su desarrollo. Luz laser con OAM, vórtices ópticos, son generalmente descritos por modos de Laguerre-Gausianos, los cuales tienen una distribución de intensidad tipo dona, con singularidades de fase en su frente de onda. En este caso particular los modos son de primer orden y la esfera de Poincaré da una conveniente representación geométrica para el subespacio expandido por esta base. Continuando la propuesta teórica hecha por B. Coutinho dos Santos et al. en 2007, en este proyecto estamos interesados en estudiar de forma experimental la dinámica de un Oscilador Paramétrico...
4
tesis de maestría
Publicado 2016
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In nature, vibrissae are tactile hairs of mammals used as sensor elements for the exploring the surrounding area. These hairs, also known as whiskers, can be found in different locations on an animals body. Mystacial vibrissae are distributed over a whiskerpad on a muzzle. Carpal vibrissae are located on the downside aspect of the forelimbs of mammals. The vibrissal hair has a conical shape and grows from a special heavily innervated hair follicle incorporating a capsule of blood. As the hair itself has no receptors along its length, the vibrissa may be considered as a system for transmitting forces and torques that arise from the contact between the hair and an object to sensory receptors inside the follicle. The present thesis deals with the vibrational motion of vibrissae dur- ing natural exploratory behaviour from the mechanical point of view. The phenomenon of the parametric resonan...
5
tesis de maestría
El control del Momento Angular Orbital (OAM por sus siglas en inglés) de la luz en sistemas óptico cuánticos puede proveernos de un grado adicional de libertad, lo cual nos puede permitir muchas aplicaciones en mecánica cuántica y tecnologías de la comunicación que tengan como eje central la óptica en su desarrollo. Luz laser con OAM, vórtices ópticos, son generalmente descritos por modos de Laguerre-Gausianos, los cuales tienen una distribución de intensidad tipo dona, con singularidades de fase en su frente de onda. En este caso particular los modos son de primer orden y la esfera de Poincaré da una conveniente representación geométrica para el subespacio expandido por esta base. Continuando la propuesta teórica hecha por B. Coutinho dos Santos et al. en 2007, en este proyecto estamos interesados en estudiar de forma experimental la dinámica de un Oscilador Paramétrico...
6
artículo
Silos are vulnerable structures during severe seismic events due to their slenderness and their interaction with stored material. This investigation presents the results of a special structure that incorporates a basal seismic isolation system, such as the Triple Friction Pendulum System (TFPS). A parametric study was conducted on eight models of reinforced concrete silos to evaluate the effectiveness of TFPS isolators in mitigating the effects of various parameters on their seismic response. This research makes significant contributions by identifying parameters that affect isolated silos, providing valuable insights into their seismic behaviour. The silos were modeled and validated by comparing the forces obtained from a modal spectral analysis with analytical forces from a previous study, achieving acceptable errors for the research objectives. Finally, a nonlinear dynamic time histor...
7
artículo
By studying María y los niños pobres (2010), a petit bourgeois artisanal feature film directed by the Peruvian filmmaker Leonidas Zegarra (02/02/1949-12/29/2020), within the theoretical framework of the parametric narration developed by Noël Burch and David Bordwell, it is provable that it has an original film form as a flow of filmtechniques because the organization of its parameters don’t resemble other movies, considering what is known today. Additionally, within the sociological frameworkdeveloped by Pierre Bourdieu, it is demonstrable with historical examples that the artists and intellectuals who decide to support formal innovation in filmmaking, attitude related to the practice known as “aesthetic distancing”, do it struggling against the “popular aesthetic” that the industrial production ruling the market uses as a basis to manufacture standardized forms that pretend...
8
artículo
Publicado 2012
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This study estimates the economic costs of mining pollution on water resources for the years 2008 and 2009 based on the conceptual framework of Environmental Efficiency. This framework identifies such costs as the mining companies’ trade-off between increasing production that is saleable at market prices (desirable output) and reducing the environmental pollution that emerges from the production process (undesirable output). These economic costs were calculated from parametric and non parametric production possibility frontiers for 28 and 37 mining units in 2008 and 2009, respectively, which were under the purview of the National Campaign for Environmental Monitoring of Effluent and Water Resources, conducted by the Energy and Mining Investment Supervisory Agency (Osinergmin) in those years. The results show that the economic cost of mining pollution on water resources rose to U.S. $ 8...
9
artículo
Publicado 2012
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This study estimates the economic costs of mining pollution on water resources for the years 2008 and 2009 based on the conceptual framework of Environmental Efficiency. This framework identifies such costs as the mining companies’ trade-off between increasing production that is saleable at market prices (desirable output) and reducing the environmental pollution that emerges from the production process (undesirable output). These economic costs were calculated from parametric and non parametric production possibility frontiers for 28 and 37 mining units in 2008 and 2009, respectively, which were under the purview of the National Campaign for Environmental Monitoring of Effluent and Water Resources, conducted by the Energy and Mining Investment Supervisory Agency (Osinergmin) in those years. The results show that the economic cost of mining pollution on water resources rose to U.S. $ 8...
10
artículo
Publicado 2021
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Adsorption is a unit operation widely used for the tertiary treatment of the most diverse effluents, whose mechanism is based on removing recalcitrant compounds from the organic and inorganic origin. In this process, choosing a suitable adsorbent is a fundamental point. This review article focuses on the adsorbents with natural geological origin: minerals, clays, geopolymers, and even wastes resulted from mining activity. Therefore, over 450 articles and research papers were explored. These materials' main sources are described, and their characteristics, composition, and intrinsic properties are related to adsorption. Herein, we discuss the effects of several process parameters, such as pH, temperature, pollutant, and adsorbent concentration. Furthermore, equilibrium, kinetics, and thermodynamic aspects are also addressed, and relevant regeneration prospects and final disposal. Finally,...
11
objeto de conferencia
Publicado 2017
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La tierra ha sido un material de construcción tradicional para construir estructuras en muchos continentes diferentes. En particular, los edificios de adobe están ampliamente difundidos en Sudamérica, y en Perú donde forman parte de la identidad cultural de la nación. Hoy en día, el conocimiento de los edificios de adobe existentes está lejos de una comprensión completa del sistema constructivo y una monitorización de la salud estructural (SHM) puede cuantificar y reducir las incertidumbres sobre su comportamiento estructural sin causar daños a los edificios. En este proceso, es deseable la implementación de herramientas automáticas para la extracción de características de los parámetros modales. En particular, la automatización es importante porque, durante una monitorización a largo plazo, se registra una enorme cantidad de datos y la comprobación directa de los datos...
12
artículo
Publicado 2020
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The present study reports the normative and psychometric information of DOT (form A and B), a brief measure of visuospatial organization relevant to applied research and clinical practice. A sample of 775 university adults participated, from Lima (Peru). The administra-tion of the test was done in groups, with standardized instructions. We found moderately high test-retest reliability; and the covariation with a fluid intelligence test was small but the-oretically consistent. The clinimetrics of the measurement error and the reliable change was adequate (minimum detectable change). The intra-group and between-group (American sample) differences revealed patterns of essentially consistent results, detecting a compara-tively greater effect of practice in the Peruvian sample. The implications of the results are discussed.
13
artículo
Publicado 2020
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The present study reports the normative and psychometric information of DOT (form A and B), a brief measure of visuospatial organization relevant to applied research and clinical practice. A sample of 775 university adults participated, from Lima (Peru). The administra-tion of the test was done in groups, with standardized instructions. We found moderately high test-retest reliability; and the covariation with a fluid intelligence test was small but the-oretically consistent. The clinimetrics of the measurement error and the reliable change was adequate (minimum detectable change). The intra-group and between-group (American sample) differences revealed patterns of essentially consistent results, detecting a compara-tively greater effect of practice in the Peruvian sample. The implications of the results are discussed.
14
artículo
Publicado 2024
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Confined brick masonry (CBM) structures have demonstrated success in seismic regions due to their straightforward construction and efficient wall-to-column connections. However, there is not enough comprehensive understanding about how these structures respond to changes in geometry and material. Addressing this gap, our study employs a robust numerical technique, utilizing an integrated finite element macromodel. In this approach, we treat wall and tie members as a unified entity, enhancing computational efficiency. The concrete damage plasticity method is applied to predict the evolution of CBM wall damage, with a subsequent pushover analysis conducted to ascertain seismic capacity and response reduction factor. This factor is further used as a criterion to appraise the performance and seismic response of CBM walls. An extensive parametric study is carried out that compares the respons...
15
artículo
Publicado 2010
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El nuevo material energético 2,2,5,5,7,7-hexanitrooctahidro-1,4,3-(azanetriilmetano)-1-azaciclobuta[cd]pentale no o Poliazaheterociclo hexanitrado (PAHN) con estructura densa y altamente tensionada ha sido estudiado teóricamente describiéndose u11a posible via sintética comparada con materiales energéticos tradicionales. La caracterización de la molécula se ha basado en análisis espectrales del tipo RMN (13)C y (15)N, UV/Vis e Infrarrojo. Los parámetros de la performance de detonación fueron estimados mediante las ecuaciones de Kamlet-Jacobs. Los cálculos fueron llevados a cabo por medio del nuevo método semi-empírico PM6 (Parametric Model 6).
16
artículo
Publicado 2010
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The new energetic material2,2,5,5,7,7-hexanitrooctahydro-1,4,3-(azanetriylmethano)-1-azacyclobuta[cd]pent alene or Poliazaheterociclo hexanitrado (PAHN) with dense and highly stressed structure has been studied theoretically describing a possible synthetic pathway_compared with traditional energetic materials. The characterization of the molecule is based on spectral analysis of the type 13C y15N RMN, UV / Vis and Infrared. The performance parameters of the detonation were estimated using the Kamlet-Jacobs equations. The calculations were carried out through the new PM6 semi-empirical method (Parametric Model 6). The optimized geometrical parameters and heats of formation were obtained by ab initio method (UHF/6-31g*) and PM6 respectively.
17
artículo
Publicado 2025
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En Perú, la norma de diseño sísmico exige el uso de aislamiento sísmico en los edificios esenciales de tipo A1 ubicados en las zonas sísmicas más altas (3 y 4). Los aisladores de caucho natural, tanto con núcleos de plomo como sin ellos, son los más utilizados; sin embargo, sus propiedades dinámicas pueden variar significativamente debido a diversos factores, los cuales son considerados en el diseño mediante los factores de modificación de propiedad Lambda. Este estudio tiene como objetivo analizar la influencia de estas variaciones en la respuesta del sistema de aislamiento y evaluar la suficiencia de los límites establecidos por el código peruano E031, conocidos como "Límite Superior" y "Límite Inferior", para capturar las respuestas sísmicas críticas de estas estructuras. Para ello, se realizó un análisis paramétrico exhaustivo para investigar cómo las variaciones...
18
artículo
Publicado 2018
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Automatic structural modal parameter estimation is a key aspect for a continuous health monitoring process. In the case of existing buildings and historical constructions, the implementation of an automatic process for structural health monitoring (SHM) is important since it provides qualitative information of the structural behavior through time. For parametric system identification, this task is faced with the automatic interpretation of stabilization diagrams and the elimination of the mathematical or spurious modes. The present paper shows a fully automated modal identification methodology based on the application of four processing stages: (i) digital signal pre processing of the recorded data and the application of the Data-Driven Stochastic Subspace Identification method to obtain modal parameters; (ii) automatic analysis of the stabilization diagram with the application of soft\h...
19
artículo
Publicado 2021
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The present experiment was conducted to evaluate the productive performance, egg quality and behavioral patterns of Japanese quails (Coturnix coturnix japonica) with and without beak trimming submitted to two stocking densities. The study was conducted for 84 days. In total, 196 Japanese quails were randomly allocated to a 2 x 2 factorial scheme: submitted or not to beak trimming procedure and low (237.5 cm²/bird) and high stocking density (316.7 cm/bird) and its interaction. Eight replicates per treatment were used, totaling 32 experimental units. Collected data were submitted to analysis of variance and, means of parametric data were compared by Tukey test (p<0.05); otherwise non-parametric analysis of variance were applied for non-parametric data of quail behavior. Lower feed intake was observed in the high stocking density group (p<0.05) but did not affect other parameters (p&...
20
artículo
Publicado 2020
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We present a theoretical scheme and its experimental proof of principle for an open quantum system undergoing Markovian and non-Markovian evolutions. We exhibit these two regimes by diagnosing them with the relative entropy of coherence of two polarization qubits playing the roles of system and ancilla. These are initially prepared in a polarization maximally entangled state of a photon pair produced by spontaneous parametric down-conversion. We induce Markovian and non-Markovian regimes in the system's dynamics with the help of two auxiliary qubits, experimentally implemented by optical paths in a layout of Sagnac and Mach-Zehnder interferometers. We replicate system-environment interactions by means of an amplitude damping channel and a suitably designed inversion of it. In our scheme, one needs only two experimentally accessible parameters to achieve Markovian and non-Markovian regime...
