9 results on '"OTÁLORA, CAMILO"'
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2. Colombian Tax Bill -- Significant Economic Presence.
- Author
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OTÁLORA, CAMILO
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INCOME tax ,INTERNATIONAL competition ,HIGH technology industries ,TRANSFER pricing ,VALUE creation - Abstract
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- Published
- 2024
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3. Colombia: Between the territorial autonomy and the mining, discussions arroind the popular consultations, the case of the municipality of Cogua
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Rodríguez Otálora, Camilo Fernando and Castro Alarcón, Héctor Fernando
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CONSULTA POPULAR ,Principle of Unitary State ,Territorial Autonomy ,Principio de Estado Unitario ,Minería ,MINERIA A CIELO ABIERTO ,Autonomía Territorial ,Cogua ,Popular Consultation ,Mining - Abstract
Colombia en los últimos años ha presentado un crecimiento importante en la actividad minera, causado por las políticas públicas en minería, que tomaron esta actividad como una de las locomotoras del desarrollo del país. Sin embargo, este crecimiento ha generado conflictos entre los habitantes de los territorios y las autoridades nacionales, encargadas de los procesos de titulación minera, los cuales han dado lugar a procesos de consultas populares, tutelas, demandas de constitucionalidad, movilizaciones, entre otros. Esta situación se ve reflejada en el municipio de Cogua – Cundinamarca, que en la actualidad se ve inmersa en esta tensión de principios constitucionales, por cuenta de diversos procesos de concesión minera dentro de su territorio, desconociendo lo establecido por las autoridades municipales respecto del ordenamiento territorial. En el marco de este trabajo, se analizará, si las consultas populares tienen el poder vinculante para prohibir o restringir la minería y cuál podría ser la forma de resolver esta tensión. In recent years, in Colombia, there has been a significant growth in mining activity, caused by public policies in mining, which took this activity as one of the locomotives of the country's development. However, this growth has generated conflicts between the inhabitants of the territories and the national authorities, in charge of mining titling processes, which have led to popular consultation processes, tutelas, demands for constitutionality, mobilizations, among others. This situation is reflected in the municipality of Cogua - Cundinamarca, which is currently immersed in this tension of constitutional principles, due to various mining concession processes within its territory, ignoring what was established by the municipal authorities regarding the order territorial. In the framework of this work, it will be analyzed, if popular consultations have the binding power to forbid or restrict mining.
- Published
- 2019
4. Improvement Properties of Hybrid Halide Perovskite Thin Films Prepared by Sequential Evaporation for Planar Solar Cells
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Reinoso, Miguel Á., primary, Otálora, Camilo A., additional, and Gordillo, Gerardo, additional
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- 2019
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5. Vulnerabilidad sísmica y capacidad de carga de un puente atirantado basados en confiabilidad estructural
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Muñoz, Edgar, Nunez, Federico, Rodríguez, Jorge A, Ramos, Alfonso, and Otálora, Camilo
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historia de esfuerzos ,local effects ,proceso constructivo ,efectos locales ,constructive process ,stress record ,Confiabilidad estructural ,capacidad de carga ,seismic vulnerability ,loading capacity ,vulnerabilidad sísmica ,monitoreo ,monitoring ,puentes atirantados ,wire strained bridges ,Structural reliability - Abstract
Se presenta en este documento los análisis de vulnerabilidad sísmica y de capacidad de carga del Viaducto Cesar Gaviria Trujillo, empleando las técnicas de confiabilidad estructural basada en las labores de instrumentación. En él se incluye labores tales como: ensayos geofísicos, ensayos de las propiedades mecánicas de materiales, vibraciones ambiéntales, medición de los efectos de la cargas vehiculares, instrumentación inalámbrica, pruebas de carga, medición de tensiones de tirantes, etc. También se explican los modelos estructurales en elementos finitos desarrollados para el puente y su proceso de calibración basado en la prueba de carga y las propiedades dinámicas determinadas experim en taimen te. Además la forma como se realizó la reconstrucción de las historias de esfuerzos de todos los elementos estructurales durante su construcción, de acuerdo con la bitácora de obra. Para los análisis de confiabilidad se hizo un estudio de amenaza sísmica y respuesta dinámica del sitio del puente, donde se obtuvieron nueve espectros de respuesta con diferentes periodos de retorno. Al estudiar las curvas de probabilidad de resistencia y solicitaciones sísmicas de los pilones, se encontró que tienen unos índices de confiabilidad adecuados dentro de las recomendaciones de las normas internacionales. Además que uno de los elementos de la superestructura que se instrumentó para evaluar su capacidad para los efectos de tráfico, tiene un índice de confiabilidad por fuera de los rangos sugeridos por las normas internacionales. Finalmente algunos tirantes tienen niveles de tensiones mayores a las admisibles especificadas durante su diseño y a las recomendadas internacionalmente para este tipo de puentes. This document presents the analysis of seismic vulnerability and load capacity for Cesar Gaviria Trujilo Viaduct, by means of structural reliability techniques based on instrumentation works. Such study includes: geophysical trial tests, trials tests on material mechanical properties, environmental vibrations, measurements on the effects of traffic load, wireless instrumentation, loading tests, wire strainers tensile strength, etc. Additionally, the study explains structural models on finite elements, which were developed for the bridge, as well as its calibration process based on the loading test, and dynamical properties determined on experimental basis. Furthermore, the study indicates the way stress records collection of all structural elements was conducted, during the construction process, in accordance with the job site log-book. As for reliability, a seismic threat analysis was made as well as dynamic responses on the bridge site, where nine spectrums were obtained at different return periods. By studying strength probability curves and seismic loads of pylons, it was found they have reliability indexes in accordance with recommendations by the international regulations. However, one of the superstructure's elements, which were introduced to evaluate its capacity on traffic effects, has a reliability index far higher than the ranges recommended by international regulations. Finally, some wire strainers have higher level tensions than specifications admitted during its design and international recommendations for these kinds of bridges.
- Published
- 2010
6. Vulnerabilidad sísmica y capacidad de carga de un puente en acero basado en confiabilidad estructural
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Muñoz, Edgar, Núñez, Federico, Rodríguez, Jorge A, Ramos, Alfonso, and Otálora, Camilo
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instrumentation ,structural model ,local effects ,efectos locales ,sobrecarga ,Confiabilidad estructural ,seismic vulnerability ,instrumentación ,vulnerabilidad sísmica ,modelo estructural ,bridges ,failure probability ,Structural reliability ,reliability index ,puentes ,índice de confiabilidad ,overloads ,probabilidad de falla - Abstract
Por medio de la confiabilidad estructural, para un Puente en Colombia después de su monitoreo. Los resultados de este trabajo son parte de una nueva metodología para evaluar puentes existentes mediante una colaboración entre Universidad-Empresas-Gobierno Nacional. Este estudio ayuda en la toma de decisiones y en la priorización de tareas de rehabilitación. Este estudio incluyó: caracterización dinámica de las vibraciones naturales del puente; adquisición de datos de fuerzas internas debidas al tráfico por medio de tecnología de LVDT's y Strain Gages; evaluación de las fuerzas actuales comparadas contra los esfuerzos máximos permitidos; modelación estática, dinámica y estructural. Adicionalmente se hizo un estudio de amenaza sísmica y respuesta dinámica del área del puente y nueve (9) diferentes espectros de respuesta fueron obtenidos, cada uno con un periodo de retorno diferente. Se encontró que las torres del puente tienen una probabilidad de falla mayor que la permitida por los códigos. Lo anterior condujo a un reforzamiento inmediato del puente. In this document, seismic vulnerability and load carrying capacity analyses are presented for a bridge in Colombia after monitoring by means of reliability of structures. Results of this work are part of a new methodology to evaluate existing bridges carried out though a partnership among University - Private Companies - and Goverment. This study helps in decision making on the priority of rehabilitation tasks. This study included: dynamic characterization of natural vibrations of the bridge; data logging of inner forces due to traffic by using LVDT's and strain gages technology; evaluation of actual forces to be compared to allowed stresses, dynamic and static structural modelling. Also, a seismic hazard and dynamic response of the local area of the bridge was developed and nine (9) different response spectra were obtained, each one varying its return period. It was found that the bridge towers have a larger failure probability than that allowed by the Codes. This produced an inmediate strengthening of the bridge.
- Published
- 2008
7. Vulnerabilidad sísmica y capacidad de carga de un puente atirantado basados en confiabilidad estructural
- Author
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Muñoz, Edgar, primary, Nunez, Federico, additional, Rodríguez, Jorge A, additional, Ramos, Alfonso, additional, and Otálora, Camilo, additional
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- 2010
- Full Text
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8. Vulnerabilidad sísmica y capacidad de carga de un puente en acero basado en confiabilidad estructural
- Author
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Muñoz, Edgar, primary, Núñez, Federico , additional, Rodríguez, Jorge A, additional, Ramos, Alfonso , additional, and Otálora, Camilo , additional
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- 2008
- Full Text
- View/download PDF
9. Improvement Properties of Hybrid Halide Perovskite Thin Films Prepared by Sequential Evaporation for Planar Solar Cells.
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Gordillo, Gerardo, Reinoso, Miguel Á., and Otálora, Camilo A.
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SOLAR cells ,LEAD iodide ,METHYLAMMONIUM ,PEROVSKITE ,OPTOELECTRONIC devices ,THIN film deposition - Abstract
Thin films of CH
3 NH3 PbI3 and (NH2 )2 CHPbI3 (from now on abbreviated as MAPI and FAPI respectively), with perovskite structure were prepared by sequential evaporation of lead iodide (PbI2 ) and methylammonium iodide (MAI) or formamidinium iodide (FAI), with special emphasis on the optimization of its optical, morphologic, and structural properties. For this, the evaporation process was automatically controlled with a system developed using virtual instrumentation (VI) that allows electronic control of both evaporation sources temperature and precursors deposition rates, using proportional integral derivative (PID) and pulse width modulation (PWM) control algorithms developed with the LabView software. Using X-ray diffraction (XRD), information was obtained regarding the phase and crystalline structure of the studied samples as well as the effect of the main deposition parameters on crystallite size and microstrain. We also studied the influence of the main deposition parameters on the optical and morphological properties through measurements of spectral transmittance and scanning electron microscopy (SEM) respectively. It was found that the implemented method of sequential evaporation allows preparing, with a high degree of reproducibility, single phase MAPI and FAPI thin films with appropriate properties to be used as active layer in hybrid solar cells. The applicability of MAPI and FAPI thin films as active layer in photovoltaic devices has been demonstrated by using them in solar cells with structure: FTO/ZnO/MAPI(or FAPI)/P3HT/Au. [ABSTRACT FROM AUTHOR]- Published
- 2019
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