Mostrando ítems 41-60 de 616

Una aproximación desde la academia a la evaluación del estado de la superficie de vías en la red terciaria

Benítez Robayo, Leidy Paola; Campagnoli Martinez, Sandra Ximena (Escuela Colombiana de Ingeniería Julio GaravitoBogotá, Colombia., 2018)

Durante las negociaciones de La Habana y en la fase inicial del pos- conflicto, se ha reconocido que una infraestructura vial que permita la transformación del campo y acerque el Estado a las comunidades rurales para ...
Architecting systems of systems: A tertiary study

Cadavid, Héctor; Andrikopoulos, Vasilios; Avgeriou, Paris (Elsevier, 2020)

Context: The term System of Systems (SoS) has increasingly been used in a wide variety of domains to describe those systems composed of independent constituent systems that collaborate towards a mission that they could not ...
Are Longer and Heavier Vehicles (LHVs) Beneficial for Society? A Cost Benefit Analysis to Evaluate their Potential Implementation in Spain

Ortega Hortelano, Alejandro; Vassallo Magro, José Manuel; Guzman Valderrama, Andres Felipe; Pérez-Martínez, P.J. (Universidad Politécnica de MadridMadrid, España., 2014)

In this paper we carry out a thorough review of the current research related to the benefits and costs arising from the implementation of longer and heavier vehicles (LHVs). From this review we concluded that despite the ...
Assessment of a mortar with recycled aggregate from a concrete improved by carbonation: a look to a sustainable construction

Muñoz, A.; Torres, N.; Guzmán, A. (Pontificia Universidad Católica de Chile.Santiago, Chile., 2019)

In this article, some of the physical, mechanical, and durability properties of mortars were evaluated. These mortars had partial replacements of the natural fine aggregate (NFA) with recycled fine aggregate (RFA) and ...
Assessment of physical, chemical, and tribochemical properties of biomedical alloys used in explanted modular hip prostheses

Gómez Taborda, Yesenia; Gomez Botero, Maryory Astrid; Castaño-González, Juan Guillermo; Bermudez-Castañeda, Angela (Sage Journals, 2021)

During their service life, modular interfaces experience tribological, and corrosion phenomena that lead to deterioration, which in turn can cause a revision procedure to remove the failed prosthesis. To achieve a clearer ...
Atenuación y distribución de probabilidad de intensidades sísmicas para Colombia y el Occidente de Venezuela

Prieto Salazar, Jorge Alonso; Foschi, Ricardo O.; Ventura, Carlos E.; Finn, W. D. Liam; Ramo, Alfonso M.; Prada Sarmiento, L. F. (Scipedia S.L.Puerto Rico, 2012)

Este artículo utiliza una base de datos de mapas de isosistas (artículo acompañante) para desarrollar dos aproximaciones. Primero, se generan ecuaciones de atenuación tradicionales de intensidad que relaciona variables ...
Automatización del laboratorio de ingeniería electrónica G204 de la ECI a través de una red inmótica

Paz Penagos, Hernán; Castellanos Tache, Germán Darío; Alarcón Ballesteros, Ronald Ferney; Weiss Velandia, Viviana Lucia; Cañón , Ángela ; Rodríguez Calderón, Juan Carlos; Rincón Fosca, Leonel Andrés (Universidad Nacional de ColombiaColombia, 2006)

El aumento de usuarios (estudiantes y profesores) de los laboratorios de ingeniería electrónica de la Escuela Colombiana de Ingeniería JULIO GARAVITO en el ˙último año ha congestionado el acceso a dichos laboratorios, ...
Autonomous motion planning of a hand-arm robotic system based on captured human-like hand postures

Rosell, Jan; Suárez, Raúl; Rosales, Carlos; Pérez Ruíz, Alexander (SpringerEstados Unidos, 2011)

The paper deals with the problem of motion planning of anthropomorphic mechanical hands avoiding collisions and trying to mimic real human hand postures. The approach uses the concept of “principal motion directions” to ...
Axiomatic Set Theory à la Dijkstra and Scholten

Acosta, Ernesto; Aldana, Bernarda; Bohórquez, Jaime; Rocha, Camilo (Springer NatureSuiza, 2017)

The algebraic approach by E.W. Dijkstra and C.S. Scholten to formal logic is a proof calculus, where the notion of proof is a sequence of equivalences proved – mainly – by using substitution of ‘equals for equals’. This ...
Axiomatic Set Theory à la Dijkstra and Scholten

Acosta, Ernesto; Aldana, Bernarda; Bohórquez, Jaime; Rocha, Camilo (Springer NatureUSA., 2017)

The algebraic approach by E.W. Dijkstra and C.S. Scholten to formal logic is a proof calculus, where the notion of proof is a sequence of equivalences proved – mainly – by using substitution of ‘equals for equals’. This ...
Axiomatic Set Theory à la Dijkstra and Scholten

Acosta Gempeler, Ernesto; Aldana Gomez, Bernarda; Bohorquez Villamizar, Jaime Alejandro; Rocha Niño, Hernan Camilo (Springer VerlagAlemania, 2017)

The algebraic approach by E. W. Dijkstra and C. S. Scholten to formallogic is a proof calculus, where the notion of proof is a sequence of equivalencesproved – mainly – by using substitution of ‘equals for equals’. This ...
Base de datos de intensidades sísmicas para Colombia y el occidente de Venezuela

Prieto Salazar, Jorge Alonso; Ventura, Carlos E.; Finn, W. D. Liam; Ramos, Alfonso Mariano; Prada-Sarmiento, Luis Felipe (Puerto Rico, 2012)

Este artículo presenta una base de datos de intensidades sísmicas recopiladas para Colombia y el Occidente de Venezuela. Esta base de datos macrosísmica está basada en la recopilación y análisis de información contenida ...
Las bases de los TLC

Sarmiento Palacio, Eduardo (Universidad Escuela Colombiana de Ingeniería Julio GaravitoBogotá D.C., 2013)

Cuando la iniciativa del TLC empezó a discutirse en el gobierno de Clinton, se consideraba que el libre mercado era una bendición que favorecía a todos los participantes. De acuerdo con el principio de ventaja comparativa, ...
Bearing capacity of circular footings resting on unsaturated desiccated soils

Lozada, Catalina; Thorel, Luc; Caicedo, Bernardo (ICE PublishingReino Unido, 2019)

When a clayey soil is exposed to desiccation, water evaporates from the surface. During dry periods, the soil may suffer from shrinking phenomena, the saturation degree decreases and formation of cracks begins. At the same ...
Behavior of oil-based modeling clay at medium strain rates

Hernandez, Camilo; Buchely, Mario; Maranon, Alejandro; Casas-Rodriguez, Juan P. (The Society for Modeling & Simulation InternationalEstados Unidos, 2021)

The modeling clay is an oil-based soft, flowable, and pliable material made from waxes and oils. Besides its primary use for making sculptures, the modeling clay is commonly used to evaluate bulletproof vests and simulate ...
Benchmarking collateral of triple-a rated securities

Sarmiento, Camilo (Washington D.C., 2020)

This paper presents a simple method to estimate the collateral associated with a Aaa tranche. The method is similar to historical simulation in the sense that there are no specific distributional assumptions, and the ...
Between closed and Ig-closed sets

Pachon Rubiano, Néstor Raúl (Business Global LLCNew York, 2018)

The concept of closed sets is a central object in general topology. In order to extend many of important properties of closed sets to a larger families, Norman Levine initiated the study of generalized closed sets. In ...
Biodiscos

Romero Rojas, Jairo Alberto (Bogotá, 1992)

Los biodiscos son un sistema de tratamiento de aguas residuales del tipo de crecimiento adherido o reactor de película fija. Las lamas o películas biológicas crecen sobre discos, en rotación a través del agua residual, ...
Bioescenarios III.

Mora, Juan José; Robayo Rodríguez, Sandra Milena (Asociación Colombiana de Ingenieros de Sistemas (ACIS)Colombia, 2008)

El uso de las tendencias bioinspiradas en el desarrollo de soluciones informáticas se está imponiendo en el mundo por ser una opción en el tratamiento de problemas complejos. En Colombia se están realizando los primeros ...
Bioescenarios IV Inteligencia de enjambres: optimización por cúmulos de partículas

Casallas Fonseca, Carlos Eduardo; Vargas Aristizábal, Steven Francisco (Asociación Colombiana de Ingenieros de Sistemas (ACIS)Colombia, 2010)

Conocer técnicas como las de los algoritmos bioinspirados, que han mostrado simplicidad y eficiencia en la solución de problemas complejos, es útil para los Ingenieros de Sistemas. Bioescenarios IV crea modelos para el ...

Envíos recientes

Una aproximación desde la academia a la evaluación del estado de la superficie de vías en la red terciaria
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Benítez Robayo, Leidy Paola | 2018

Durante las negociaciones de La Habana y en la fase inicial del pos- conflicto, se ha reconocido que una infraestructura vial que permita la transformación del campo y acerque el Estado a las comunidades rurales para proveerlas de servicios sociales fundamentales, como salud, vivienda y educación, y que promueva actividades económicas lícitas y el desarrollo de proyectos productivos, es una de las herramientas esenciales para la construcción de una paz estable y duradera. En este ámbito, las facultades de ingeniería civil tienen un papel preponderante, no solo para pronunciarse sobre aspectos técnicos relacionados con el mejoramiento, la conservación o la construcción de vías en la red terciaria, sino también para que sus estudiantes, desde su proceso de formación, conjugando lo académico con lo práctico, se conviertan en agentes activos en el posconflicto y generadores de cambio. Con esta perspectiva, el Semillero de Investigación en Pavimentos de la Escuela Colombiana de Ingeniería Julio Garavito hizo el trabajo que se presenta en este artículo, en el que, aplicando el método Viziret evaluó el estado de las superficies de vías, con el fin de proponer soluciones para la intervención, en tramos de la red vial terciaria de los departamentos de Santander y Boyacá que pasan por los municipios de Jesús María, La Belleza, Florián y Saboyá. En términos generales, se concluye que el estado de las vías transita- das es el resultado de condiciones ambientales y topográficas que no hacen viable la solución de afirmado como superficie de rodadura y que, aun si se cumpliera con las especificaciones de materiales y se llevarán a cabo actividades de mantenimiento en las vías, este tipo de solución continúa siendo insostenible para los niveles de precipitación y gradientes topográficos que se presentan en la zona.

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Architecting systems of systems: A tertiary study
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Cadavid, Héctor | 2020

Context: The term System of Systems (SoS) has increasingly been used in a wide variety of domains to describe those systems composed of independent constituent systems that collaborate towards a mission that they could not accomplish on their own. There is a significant volume of research by the software architecture community that aims to overcome the challenges involved in architecting SoS, as evidenced by the number of secondary studies in the field published so far. However, the boundaries of such research do not seem to be well defined, at least partially, due to the emergence of SoS-adjacent areas of interest like the Internet of Things.Objective: This paper aims to investigate the current state of research on SoS architecting by synthesizing the demographic data, assessing the quality and the coverage of architecting activities and software quality attributes by the research, and distilling a concept map that reflects a community-wide understanding of the concept of SoS. Method: We conduct what is, to the best of our understanding, the first tertiary study on SoS architecting. Such tertiary study was based on five research questions, and was performed by following the guidelines of Kitchenham et al. In all, 19 secondary studies were evaluated, which is comparable to other tertiary studies. Results: The study illustrates a state of disconnection in the research community, with research gaps in the coverage of particular phases and quality attributes. Furthermore, a more effective approach in classifying systems as SoS is required, as the means of resolving conceptual and terminological overlaps with the related domains. Conclusions: Despite the amount of research in the area of SoS architecting, more coordinated and systematic targeted efforts are required in order to address the identified issues with the current state of research.

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Are Longer and Heavier Vehicles (LHVs) Beneficial for Society? A Cost Benefit Analysis to Evaluate their Potential Implementation in Spain
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Ortega Hortelano, Alejandro | 2014

In this paper we carry out a thorough review of the current research related to the benefits and costs arising from the implementation of longer and heavier vehicles (LHVs). From this review we concluded that despite the many studies available, little has been said about the sensitivity of the benefits and costs to the ultimate performance of the key variables related to the evolution of the economy, road transport performance, safety, and so on. In order to fill this gap, we have designed a sensitivity approach based on a cost benefit analysis tool to determine which variables demonstrate the greatest influence on the benefits and costs stemming from the implementation of LHVs. In order to test the methodology, we have used it in an analysis of the Spanish trunk network. The results show that the benefits of LHVs for society are significant. Even in the least favorable scenario, the economic benefits are greater than €3500 million over 15 years, and the environment enhanced as well, for CO2 emissions are reduced by 2 Million tonnes. Overall we noted how the results are not very sensitive to the evolution of key variables in determining the final outcome. However, we found that the variables that have the greatest affect on the final benefit, such as traffic growth and social discount rate, depend basically on the performance of the overall economy. Moreover, the private cost for haulers seems to be more important in determining the final benefit than externality costs.

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Assessment of a mortar with recycled aggregate from a concrete improved by carbonation: a look to a sustainable construction
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Muñoz, A. | 2019

In this article, some of the physical, mechanical, and durability properties of mortars were evaluated. These mortars had partial replacements of the natural fine aggregate (NFA) with recycled fine aggregate (RFA) and carbonated recycled fine aggregate (CRFA) in amounts of 0%, 25%, and 50%. For this purpose, 3 groups of mortar mixtures were elaborated with a w/c ratio of 0.65. The results showed that an increase in the percentage of replacement of the CRFA, led to an improvement in the compressive strength of the mortar, as well as a lower superficial absorption rate.

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Assessment of physical, chemical, and tribochemical properties of biomedical alloys used in explanted modular hip prostheses
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Gómez Taborda, Yesenia | 2021

During their service life, modular interfaces experience tribological, and corrosion phenomena that lead to deterioration, which in turn can cause a revision procedure to remove the failed prosthesis. To achieve a clearer understanding of the surface performance of those biomedical alloys and the role of the surface properties in the mechanical and chemical performance, samples were taken from retrieval implants made of Ti6Al4V and Co28Cr6Mo alloys. Polarization resistance and pin-on-disk tests were performed on these samples. Physical properties such as contact angle, roughness, microhardness, and Young’s modulus were determined. A correlation between surface energy and evolution of the tribological contact was observed for both biomedical alloys. In tribocorrosion tests, titanium particles seem to remain in the surface, unlike what is observed in CoCr alloys. These metallic or oxidized particles could cause necrosis or adverse tissue reactions.

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Atenuación y distribución de probabilidad de intensidades sísmicas para Colombia y el Occidente de Venezuela
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Prieto Salazar, Jorge Alonso | 2012

Este artículo utiliza una base de datos de mapas de isosistas (artículo acompañante) para desarrollar dos aproximaciones. Primero, se generan ecuaciones de atenuación tradicionales de intensidad que relaciona variables continuas y discretas, y segunda se presenta un método alternativo de tratamiento del problema que desarrolla funciones probabilísticas conjuntas mixtas discretas-continuas que permite estimar directamente las probabilidades de ocurrencia o excedencia de diferencia de intensidades dada la distancia a un sitio y la intensidad epicentral. La distribución condicional de la distancia dado un nivel de intensidad o diferencia de intensidad es continua y se representa por una distribución lognormal. La distribución de intensidades es discreta y se representa por una función de Poisson bimodal. La representación bimodal se puede deber a reflexiones de onda en la frontera entre la litósfera y la astenósfera. Ambas aproximaciones se aplican para sismos de subducción y eventos superficiales ocurridos en Colombia y el Occidente de Venezuela

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Automatización del laboratorio de ingeniería electrónica G204 de la ECI a través de una red inmótica
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Paz Penagos, Hernán | 2006

El aumento de usuarios (estudiantes y profesores) de los laboratorios de ingeniería electrónica de la Escuela Colombiana de Ingeniería JULIO GARAVITO en el ˙último año ha congestionado el acceso a dichos laboratorios, razón por la cual el Centro de Estudios de Electrónica Aplicada, Grupo de Investigación ìEcitrÛnica8 del programa de ingeniería electrónica de la escuela, propuso, diseñó y desarrolló un proyecto de investigación que aprovecha el tendido de distribución eléctrica del edificio G para ofrecer facilidades de acceso, control de equipos de laboratorio, ahorro de energía y mejoramiento de la calidad de servicio. El sistema de la red inmótica para el laboratorio G-204 estar· constituida con los siguientes subsistemas: a. Un control de acceso con una arquitectura cliente - servidor; en este ˙último reposa una base de datos de los usuarios, horarios, equipos y mesas de trabajo; el usuario se conecta desde cualquier computador (cliente) al servidor a través de Internet para separar el turno de su práctica de laboratorio; en esa operación selecciona el horario, los equipos, la mesa, el tipo de red que requiere (monofásica o trifásica) y registra a sus compañeros de trabajo. El acceso al laboratorio G-204, en el día y la hora de su práctica, se realiza mediante un lector de tarjetas inteligentes. b. Control de información de un aviso publicitario y de un reloj electrónico: desde el servidor se genera y controla el envío de información de interés a un aviso publicitario conformado por tres pantallas LCD ubicadas en una de las paredes del segundo piso del edificio G; así mismo, se actualiza continuamente la hora y se informa sobre la temperatura del laboratorio G-204. c. Habilitación o deshabilitación de los bancos de trabajo: mediante un control on-off, con mando desde el servidor, se energizan (al inicio de la práctica) o desenergizan (al final de la práctica o ante eventualidades) los bancos de trabajo para proteger los equipos, ahorrar energía y facilitar a los monitores la logística de supervisión del estado de los equipos, al final de cada práctica. Para la ejecución del proyecto, el equipo de investigación se organizó en dos subgrupos de trabajo: "línea de transmisión" y subgrupo de "aplicaciones". El grupo de investigación aplica la tecnología Power Line Communications "PLC" y sus investigadores exploran diferentes alternativas de modulación digital, codificación y detección de errores, acoples, protocolos de transmisión de datos y nuevas aplicaciones; todo esto basado sobre la estimación del canal (tendido eléctrico) como medio de transmisión.

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Autonomous motion planning of a hand-arm robotic system based on captured human-like hand postures
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Rosell, Jan | 2011

The paper deals with the problem of motion planning of anthropomorphic mechanical hands avoiding collisions and trying to mimic real human hand postures. The approach uses the concept of “principal motion directions” to reduce the dimension of the search space in order to obtain results with a compromise between motion optimality and planning complexity (time). Basically, the work includes the following phases: capturing the human hand workspace using a sensorized glove and mapping it to the mechanical hand workspace, reducing the space dimension by looking for the most relevant principal motion directions, and planning the hand movements using a probabilistic roadmap planner. The approach has been implemented for a four finger anthropomorphic mechanical hand (17 joints with 13 independent degrees of freedom) assembled on an industrial robot (6 independent degrees of freedom), and experimental examples are included to illustrate its validity.

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Axiomatic Set Theory à la Dijkstra and Scholten
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Acosta, Ernesto | 2017

The algebraic approach by E.W. Dijkstra and C.S. Scholten to formal logic is a proof calculus, where the notion of proof is a sequence of equivalences proved – mainly – by using substitution of ‘equals for equals’. This paper presents Set , a first-order logic axiomatization for set theory using the approach of Dijkstra and Scholten. What is novel about the approach presented in this paper is that symbolic manipulation of formulas is an effective tool for teaching an axiomatic set theory course to sophomore-year undergraduate students in mathematics. This paper contains many examples on how argumentative proofs can be easily expressed in Set and points out how the rigorous approach of Set can enrich the learning experience of students. The results presented in this paper are part of a larger effort to formally study and mechanize topics in mathematics and computer science with the algebraic approach of Dijkstra and Scholten.

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Axiomatic Set Theory à la Dijkstra and Scholten
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Acosta, Ernesto | 2017

The algebraic approach by E.W. Dijkstra and C.S. Scholten to formal logic is a proof calculus, where the notion of proof is a sequence of equivalences proved – mainly – by using substitution of ‘equals for equals’. This paper presents Set , a first-order logic axiomatization for set theory using the approach of Dijkstra and Scholten. What is novel about the approach presented in this paper is that symbolic manipulation of formulas is an effective tool for teaching an axiomatic set theory course to sophomore-year undergraduate students in mathematics. This paper contains many examples on how argumentative proofs can be easily expressed in Set and points out how the rigorous approach of Set can enrich the learning experience of students. The results presented in this paper are part of a larger effort to formally study and mechanize topics in mathematics and computer science with the algebraic approach of Dijkstra and Scholten.

LEER
Axiomatic Set Theory à la Dijkstra and Scholten
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Acosta Gempeler, Ernesto | 2017

The algebraic approach by E. W. Dijkstra and C. S. Scholten to formallogic is a proof calculus, where the notion of proof is a sequence of equivalencesproved – mainly – by using substitution of ‘equals for equals’. This paper presentsSet, a first-order logic axiomatization for set theory using the approach of Dijk-stra and Scholten. The approach is novel in that the symbolic manipulation offormulas is shown to be an eective tool for teaching axiomatic set theory tosophomore students in mathematics. This paper contains many examples on howargumentative proofs can be easily expressed inSetand points out howSetcanenrich the learning experience of students. These results are part of a larger ef-fort to formally study and mechanize topics in mathematics and computer sciencewith the algebraic approach of Dijkstra and Scholten.

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Base de datos de intensidades sísmicas para Colombia y el occidente de Venezuela
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Prieto Salazar, Jorge Alonso | 2012

Este artículo presenta una base de datos de intensidades sísmicas recopiladas para Colombia y el Occidente de Venezuela. Esta base de datos macrosísmica está basada en la recopilación y análisis de información contenida en mapas de isosistas generada por diferentes investigadores en el Norte de Suramérica. La base de datos incluye 68 eventos sísmicos ocurridos entre 1766 y 2004. Para estos eventos, se presentan 283 pares de datos de intensidad – radio equivalente. El presente trabajo constituye la base para futuras investigaciones cuyo objetivo sea mejorar el entendimiento de la atenuación de la energía sísmica en la región.

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Las bases de los TLC
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Sarmiento Palacio, Eduardo | 2013

Cuando la iniciativa del TLC empezó a discutirse en el gobierno de Clinton, se consideraba que el libre mercado era una bendición que favorecía a todos los participantes. De acuerdo con el principio de ventaja comparativa, esperaban que la reducción de los aranceles y el libre movimiento de capitales propiciaran una elevación de la productividad y los salarios que favorecieran a los dos socios. Se suponía que la producción de bienes de ventaja comparativa garantizaba la demanda y conducía a la solución más eficiente.

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Bearing capacity of circular footings resting on unsaturated desiccated soils
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Lozada, Catalina | 2019

When a clayey soil is exposed to desiccation, water evaporates from the surface. During dry periods, the soil may suffer from shrinking phenomena, the saturation degree decreases and formation of cracks begins. At the same time, an overconsolidated soil appears at the surface of the deposit. Some previous studies devoted to this problem have highlighted the impact of cracks on desiccated profiles. However, these analyses have been carried out without considering the suction effect. The present study examines the specific case of the cracked soils found in the area of Sabana de Bogotá in Colombia. In this research, some soil models are tested using the Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux's geotechnical centrifuge. In this paper, the experimental procedure is first described. Then, the experimental results for the bearing capacity are presented. Finally, an analysis of the bearing capacity is carried out by considering the matric suction effect. This analysis compares different theoretical methods used to calculate the bearing capacity of shallow foundations resting on unsaturated soils with the experimental results obtained using the centrifuge. The results of the analysis underline the necessity of considering suction for the computation of the bearing capacity of unsaturated soils.

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Behavior of oil-based modeling clay at medium strain rates
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Hernandez, Camilo | 2021

The modeling clay is an oil-based soft, flowable, and pliable material made from waxes and oils. Besides its primary use for making sculptures, the modeling clay is commonly used to evaluate bulletproof vests and simulate metal manufacturing processes by conformation. In ballistic tests, the clay is used to retain the deformation of the rear face of body armors; and in the study of metal forming processes, it is used as a physical model to provide information on the plastic flow. However, its mechanical dynamic behavior is not entirely understood. In this study, Plastilina Roma No. 1 modeling clay was mechanically characterized using the power-law constitutive model at medium strain rates . The material parameters were determined using a penetration model based on the Cavity Expansion Theory and an inverse technique involving the comparison of the model with experimentation. The optimum set of constitutive parameters was found by reducing the difference of the calculated penetration profile and the measurements from a drop test. This optimization process was programmed on the MATLAB–Simulink environment. The determined material parameters were validated by comparing the results from a computational model with three test set-ups. Finite element model results show good concordance with experimental measurements.

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Benchmarking collateral of triple-a rated securities
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Sarmiento, Camilo | 2020

This paper presents a simple method to estimate the collateral associated with a Aaa tranche. The method is similar to historical simulation in the sense that there are no specific distributional assumptions, and the data fully determine the characteristics of the distribution. Both the transparency and simplicity of our method provide a valuable benchmark to existent tail of the distribution modelling. As a benchmark, our method also serves to validate collateral estimates for Aaa-rated securities as well as to validate capitalization models of financial institutions.

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Between closed and Ig-closed sets
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Pachon Rubiano, Néstor Raúl | 2018

The concept of closed sets is a central object in general topology. In order to extend many of important properties of closed sets to a larger families, Norman Levine initiated the study of generalized closed sets. In this paper we introduce, via ideals, new generalizations of closed subsets, which are strong forms of the Ig-closed sets, called ρIg-closed sets and closed-I sets. We present some properties and applications of these new sets and compare the ρIg-closed sets and the closed-I sets with the g-closed sets introduced by Levine. We show that I-closed and closed-I are independent concepts, as well as I * -closed sets and closed-I concepts.

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Biodiscos
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Romero Rojas, Jairo Alberto | 1992

Los biodiscos son un sistema de tratamiento de aguas residuales del tipo de crecimiento adherido o reactor de película fija. Las lamas o películas biológicas crecen sobre discos, en rotación a través del agua residual, montados sobre un eje horizontal. La primera instalación fue hecha en Alemania Occidental en 1960; en E.U. existían 59 plantas de biodiscos en 1978, 308 en 1980 (1) y más de 600 en 1988, para caudales de menos de 0.04 m³/s y más de 2.2 m³/s.

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Bioescenarios III.
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Mora, Juan José | 2008

El uso de las tendencias bioinspiradas en el desarrollo de soluciones informáticas se está imponiendo en el mundo por ser una opción en el tratamiento de problemas complejos. En Colombia se están realizando los primeros estudios y aplicaciones, por lo que adquirir este conocimiento puede dar a los ingenieros de sistemas del país una ventaja competitiva. Bioescenarios III busca apoyar los procesos de aprendizaje sobre la tendencia de sistemas inmunológicos artificiales.

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Bioescenarios IV Inteligencia de enjambres: optimización por cúmulos de partículas
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Casallas Fonseca, Carlos Eduardo | 2010

Conocer técnicas como las de los algoritmos bioinspirados, que han mostrado simplicidad y eficiencia en la solución de problemas complejos, es útil para los Ingenieros de Sistemas. Bioescenarios IV crea modelos para el desarrollo de escenarios de aprendizaje sobre la tendencia inteligencia de enjambres: optimización por cúmulos de partículas.

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Tipo de Material

Una aproximación desde la academia a la evaluación del estado de la superficie de vías en la red terciaria ﻿

Architecting systems of systems: A tertiary study ﻿

Are Longer and Heavier Vehicles (LHVs) Beneficial for Society? A Cost Benefit Analysis to Evaluate their Potential Implementation in Spain ﻿

Assessment of a mortar with recycled aggregate from a concrete improved by carbonation: a look to a sustainable construction ﻿

Assessment of physical, chemical, and tribochemical properties of biomedical alloys used in explanted modular hip prostheses ﻿

Atenuación y distribución de probabilidad de intensidades sísmicas para Colombia y el Occidente de Venezuela ﻿

Automatización del laboratorio de ingeniería electrónica G204 de la ECI a través de una red inmótica ﻿

Autonomous motion planning of a hand-arm robotic system based on captured human-like hand postures ﻿

Axiomatic Set Theory à la Dijkstra and Scholten ﻿

Axiomatic Set Theory à la Dijkstra and Scholten ﻿

Axiomatic Set Theory à la Dijkstra and Scholten ﻿

Base de datos de intensidades sísmicas para Colombia y el occidente de Venezuela ﻿

Las bases de los TLC ﻿

Bearing capacity of circular footings resting on unsaturated desiccated soils ﻿

Behavior of oil-based modeling clay at medium strain rates ﻿

Benchmarking collateral of triple-a rated securities ﻿

Between closed and Ig-closed sets ﻿

Biodiscos ﻿

Bioescenarios III. ﻿

Bioescenarios IV Inteligencia de enjambres: optimización por cúmulos de partículas ﻿

Envíos recientes

Una aproximación desde la academia a la evaluación del estado de la superficie de vías en la red terciaria

Architecting systems of systems: A tertiary study

Are Longer and Heavier Vehicles (LHVs) Beneficial for Society? A Cost Benefit Analysis to Evaluate their Potential Implementation in Spain

Assessment of a mortar with recycled aggregate from a concrete improved by carbonation: a look to a sustainable construction

Assessment of physical, chemical, and tribochemical properties of biomedical alloys used in explanted modular hip prostheses

Atenuación y distribución de probabilidad de intensidades sísmicas para Colombia y el Occidente de Venezuela

Automatización del laboratorio de ingeniería electrónica G204 de la ECI a través de una red inmótica

Autonomous motion planning of a hand-arm robotic system based on captured human-like hand postures

Axiomatic Set Theory à la Dijkstra and Scholten

Axiomatic Set Theory à la Dijkstra and Scholten

Axiomatic Set Theory à la Dijkstra and Scholten

Base de datos de intensidades sísmicas para Colombia y el occidente de Venezuela

Las bases de los TLC

Bearing capacity of circular footings resting on unsaturated desiccated soils

Behavior of oil-based modeling clay at medium strain rates

Benchmarking collateral of triple-a rated securities

Between closed and Ig-closed sets

Biodiscos

Bioescenarios III.

Bioescenarios IV Inteligencia de enjambres: optimización por cúmulos de partículas

Una aproximación desde la academia a la evaluación del estado de la superficie de vías en la red terciaria

Architecting systems of systems: A tertiary study

Are Longer and Heavier Vehicles (LHVs) Beneficial for Society? A Cost Benefit Analysis to Evaluate their Potential Implementation in Spain

Assessment of a mortar with recycled aggregate from a concrete improved by carbonation: a look to a sustainable construction

Assessment of physical, chemical, and tribochemical properties of biomedical alloys used in explanted modular hip prostheses

Atenuación y distribución de probabilidad de intensidades sísmicas para Colombia y el Occidente de Venezuela

Automatización del laboratorio de ingeniería electrónica G204 de la ECI a través de una red inmótica

Autonomous motion planning of a hand-arm robotic system based on captured human-like hand postures

Axiomatic Set Theory à la Dijkstra and Scholten

Axiomatic Set Theory à la Dijkstra and Scholten

Axiomatic Set Theory à la Dijkstra and Scholten

Base de datos de intensidades sísmicas para Colombia y el occidente de Venezuela

Las bases de los TLC

Bearing capacity of circular footings resting on unsaturated desiccated soils

Behavior of oil-based modeling clay at medium strain rates

Benchmarking collateral of triple-a rated securities

Between closed and Ig-closed sets

Biodiscos

Bioescenarios III.

Bioescenarios IV Inteligencia de enjambres: optimización por cúmulos de partículas