36 results on '"Pinzón, Luis A."'
Search Results
2. Correlation between seismic intensity measures and engineering demand parameters of reinforced concrete frame buildings through nonlinear time history analysis
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Pinzón, Luis A., Hidalgo-Leiva, Diego A., Alva, Rodrigo E., Mánica, Miguel A., and Pujades, Luis G.
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- 2023
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- View/download PDF
3. Time domain deconvolution in nonlinear elastoplastic soil deposits
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Mánica, Miguel A., Pinzón, Luis A., Pujades, Luis G., Hidalgo-Leiva, Diego A., and Ordaz, Mario G.
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- 2023
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4. Correction Factors to Account for Seismic Directionality Effects: Case Study of the Costa Rican Strong Motion Database.
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Pinzón, Luis A., Hidalgo-Leiva, Diego A., and Pujades, Luis G.
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CORRECTION factors , *DATABASES , *GROUND motion , *EARTHQUAKE magnitude , *SEISMOGRAMS , *EARTHQUAKE hazard analysis - Abstract
This article presents the findings of a study on the directionality effect observed in strong motion records. We set out to establish ratios between several seismic intensity measures that depend on sensor orientation (e.g., GMar, Larger) and others that are orientation-independent (e.g., RotDpp, GMRotDpp, and GMRotIpp), with the intention of proposing multiplicative correction factors. The analysis included an evaluation of the impact of site conditions, ground motion intensity, earthquake magnitude, and hypocentral distance on these ratios. Following a concise overview of the directionality effects and the associated intensity measures, the Costa Rican Strong Motion Database, comprising a total of 4199 horizontal accelerograms (two components), was employed to determine the correction factors. The analysis was carried out for 5% damped response spectra within the 0.01–5 s period range. The study focuses on orientation-independent intensity measures that are derived by combining the maximum values from the recorded motions. In the comprehensive analysis of the complete database, a trend was observed between these intensity measures and the magnitude of the earthquake along with the hypocentral distance. Specifically, records from earthquakes with greater magnitudes exhibited a lower maximum spectral response to the geometric mean of the response spectra of the as-recorded (ar) components ratio (RotD100/GMar), similar to records from earthquakes with larger hypocentral distances. Based on these findings, a proposal was put forth to estimate RotD100 values using GMar values. This ratio can prove useful in transforming data from previous seismic hazard studies, including those applied in many seismic codes, and in defining the maximum anticipated seismic intensity for design purposes in a more straightforward manner. [ABSTRACT FROM AUTHOR]
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- 2024
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5. A drift-correlated ground motion intensity measure: Application to steel frame buildings
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Pinzón, Luis A., Vargas-Alzate, Yeudy F., Pujades, Luis G., and Diaz, Sergio A.
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- 2020
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6. Dynamic soil-structure interaction analyses considering directionality effects
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Pinzón, Luis A., Mánica, Miguel A., Pujades, Luis G., and Alva, Rodrigo E.
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- 2020
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7. Military or trade port cities? About the form and function of the Hispanic colonial cities in Latin America and the Caribbean.
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Rubén Pérez Pinzón, Luis and Bassols I Gardella, Narcís
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PORT cities , *CITIES & towns , *RESEARCH questions , *HISPANIC Americans , *EIGHTEENTH century , *URBAN studies , *URBAN morphology - Abstract
This work studies urban form and function in Hispanic American colonial port cities. By combining different research questions and points of view, new insights are given into matters such as the origin of their urban grids, the development of their fortifications throughout the colonial era, and the military versus trade function they accomplished. The focus is on Cartagena de Indias, Colombia, with other Hispanic colonial cities also included in the discussion. The field work is based on primary literature about colonial laws and ordinances and the reports of several viceroys in the eighteenth century as well as a wide array of secondary literature in different languages. The results show that, while these cities fulfilled an important role as trade nodes, this function was second to their military role. However, both functions are found to be interdependent in a number of ways. [ABSTRACT FROM AUTHOR]
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- 2023
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8. Seismic Damage "Semaphore" Based on the Fundamental Period Variation: A Probabilistic Seismic Demand Assessment of Steel Moment-Resisting Frames.
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Díaz, Sergio A., Pinzón, Luis A., Vargas-Alzate, Yeudy F., and Mora-Ortiz, René S.
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EARTHQUAKE hazard analysis ,STEEL framing ,STRUCTURAL health monitoring ,STEEL buildings ,STRUCTURAL steel ,ON-site evaluation - Abstract
During strong earthquakes, structural damage usually occurs, resulting in a degradation of the overall stiffness of the affected structures. This degradation produces a modification in the dynamic properties of the structures, for instance, in the fundamental period of vibration (T
1 ). Hence, the variation of T1 could be used as an indicator of seismic structural damage. In this article, a seismic damage assessment in four generic typologies of steel buildings was carried focused on verifying the variation of T1 . To do so, several seismic damage states were calculated using the maximum inter-story drift ratio, MIDR, and following the Risk-UE guidelines. Then, a series of probabilistic nonlinear static analyses was implemented using Monte Carlo simulations. The probabilistic approach allows one to vary the main mechanical properties of the buildings, thus analyzing in this research 4000 buildings (1000 building samples for each of the four generic typologies). The variation of T1 was estimated using the capacity spectrum, and it was related to the MIDR for each damage state. As a main result of this study, the expected variation of T1 for several damage states is provided. Finally, a proposal for a seismic damage preventive "semaphore" and fragility curves are presented. These results may be useful as parameters or criteria in the evaluation of on-site structural monitoring for steel buildings. [ABSTRACT FROM AUTHOR]- Published
- 2023
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9. Clasificación de sitio de la Red de Acelerógrafos de Costa Rica basada en mediciones de VS30 y en el período fundamental
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Pinzón, Luis A., Leiva, Diego A. Hidalgo, Moya-Fernández, Aaron, Schmidt-Díaz, Victor, and Pujades, Luis G.
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Costa Rica ,velocidad promedio de la onda de corte ,site fundamental period ,HVSR ,relaciones horizontales/ verticales ,Clasificación de sitio ,shear-wave velocity ,V s30 ,Site classification ,período fundamental de sitio - Abstract
In this paper, the soil profile of the Costa Rican Strong-Motion Network (CRSMN) stations is classified based on actual measurements and seismic regulations. The soil classification of the Costa Rican Seismic Code based on the average shear-wave velocity of the top 30 m (V S3r ) is used as a reference. The site fundamental period (Tf) is included as a parameter to complement the existing characterization. For this, V S3gg measurements from 52 accelerometric stations are related to the site fundamental period obtained through horizontal-to-vertical spectral ratios (HVSR) using ground motion records from the Costa Rican Strong-Motion Database. The H/V ratios are estimated with 5% damped acceleration response spectra and with traditional Fourier amplitude spectra from the S-wave window. From the relation be-tween V S3g and Tf, different ranges of are assigned to the existing soil profile classification and a graph with three-lines and four-areas is proposed to classify the stations of the CRSMN. These lines are plotted from the intersection between values assigned to each site class. The assigned classification at each station will be the one corresponding to the area where the pair of values (V S3g - Tf) falls. With this proposal, both parameters take relevance and are compensated, reducing the differences due to possible errors in measurements or interpretations. RESUMEN En este artículo, se propone una nueva clasificación de sitio para la Red de Acelerógrafos de Costa Rica (RACR). Se utiliza como referencia la clasificación de sitio del Código Sísmico de Costa Rica basada en la velocidad promedio de la onda de corte de los 30 m superiores (VS3g). El período fundamental del sitio (T f ) se incluye como parámetro para complementar la caracterización existente. Para ello, las mediciones de V S3gg de 52 estaciones acelerométricas se relacionan con el período fundamental del sitio, este obtenido a partir de relaciones espectrales H/V utilizando registros de la Base de Datos de Movimiento Fuerte de Costa Rica. Las relaciones H/V se estiman con espectros de respuesta de aceleración con 5% de amortiguamiento y con espectros de amplitud de Fourier tradicionales obtenidos de la ventana de ondas S. A partir de la relación entre V S3g y T f , fueron asignados diferentes rangos de T f a la clasificación de perfil de suelo existente y se propone un gráfico con tres líneas y cuatro áreas para clasificar las estaciones de la RACR. Estas líneas fueron graficadas a partir de la intersección de los valores asignados a cada clase de sitio. La clasificación de cada estación será la correspondiente a la zona donde se encuentre el conjunto de valores V S30 y T f . Con esta propuesta, ambos parámetros toman relevancia y se compensan, reduciendo las diferencias por posibles errores en las mediciones o interpretaciones.
- Published
- 2022
10. RACIAL SEGREGATION AND URBAN PLANNING IN LATIN AMERICA: A HISTORIOGRAPHICAL STUDY OF CONTEMPORARY CARTAGENA, COLOMBIA.
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Gardella, Narcís Bassols and Pérez Pinzón, Luis Rubén
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URBAN planning , *URBAN history , *GENTRIFICATION , *SEGREGATION , *RACISM - Abstract
Latin America is a continent living amidst strong inequalities, and the region’s cities reflect this in a distinct way. In order to analyse and explain urban inequality in the region, this article studies the case of Cartagena de Indias, on the Colombian Caribbean coast, from the points of view of different historical studies about the racial gaze, gentrification, racial capitalism, and the research connecting urban planning and racial segregation, among others. By applying the historical method, the authors delve into institutional primary and secondary sources from the contemporary historiography, which relate urban development to racial issues. The main outcome is a deeper understanding of the urban and racial phenomena in the context of current theories, with some re-weighing of their impacts. Much of the discussion about racial segregation in Latin America has revolved around metropolises and forgotten medium-sized cities. To remedy this, an overview of studies and theories is offered and subsequently applied to a medium-sized city such as Cartagena, with examples from this city’s planning history in conjunction with its social history and tourist development. [ABSTRACT FROM AUTHOR]
- Published
- 2023
11. Rethinking research management in Colombia
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Zarama, Roberto, Reyes, Alfonso, Aldana, Eduardo, Villalobos, Jorge, Bohorquez, Juan C., Calderón, Juan P., Botero, Alonso, Lammoglia, Nelson L., Villaveces, José L., Pinzón, Luis, Bonilla, Ricardo, Mejía, Andrés, Bermeo, José, Dyner, Isaac, Johnson, Neil F., and Valdivia, Juan A.
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- 2007
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12. Time-domain deconvolution procedure for elastoplastic materials: Application to the Treasure Island site during the 1989 Loma Prieta earthquake
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Pinzón, Luis A., Hernández, Eduardo D., and Mánica, Miguel A.
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- 2023
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13. Seismic site classification of the Costa Rican Strong-Motion Network based on VS30 measurements and site fundamental period.
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Pinzón, Luis A., Hidalgo Leiva, Diego A., Moya-Fernández, Aaron, Schmidt-Díaz, Victor, and Pujades, Luis G.
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SOIL classification , *MEASUREMENT errors , *CLASSIFICATION , *SHEAR waves - Abstract
In this paper, the soil profile of the Costa Rican Strong-Motion Network (CRSMN) stations is classified based on actual measurements and seismic regulations. The soil classification of the Costa Rican Seismic Code based on the average shear-wave velocity of the top 30 m (VS30) is used as a reference. The site fundamental period (Tf) is included as a parameter to complement the existing characterization. For this, VS30 measurements from 52 accelerometric stations are related to the site fundamental period obtained through horizontal-to-vertical spectral ratios (HVSR) using ground motion records from the Costa Rican Strong-Motion Database. The H/V ratios are estimated with 5% damped acceleration response spectra and with traditional Fourier amplitude spectra from the S-wave window. From the relation between VS30 and Tf, different ranges of Tf are assigned to the existing soil profile classification and a graph with three-lines and four-areas is proposed to classify the stations of the CRSMN. These lines are plotted from the intersection between values assigned to each site class. The assigned classification at each station will be the one corresponding to the area where the pair of values (VS30 - Tf) falls. With this proposal, both parameters take relevance and are compensated, reducing the differences due to possible errors in measurements or interpretations. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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14. Increased seismic hazard in Barcelona (Spain) due to soil-building resonance effects
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Pinzón, Luis A., Pujades, Luis G., Macau, Albert, and Figueras, Sara
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- 2019
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15. Directionality models from ground motions of Italy
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Pinzón, Luis A., Pujades Beneit, Lluís|||0000-0002-2619-0805, Hidalgo Leiva, D.A., Díaz, Sergio Alberto, Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, and Universitat Politècnica de Catalunya. GIES - Geofísica i Enginyeria Sísmica
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Seismology--Italy ,directionality ,seismic response ,intensity measures ,orientation-independent ,Enginyeria civil::Geotècnia::Sismologia [Àrees temàtiques de la UPC] ,spectral response ,Sismologia -- Observacions - Abstract
Directionality effects on the expected strong ground motion in Italy are investigated. After a brief description of the directionality effect and the intensity measures involved, a wide Italian database of strong ground motion records is used, with a total of 949 horizontal accelerograms (two components). The analysis is performed for 5% damped response spectra in the 0.01-4 s period range. Rotation-independent intensity measures, resulting from combining maximum values of the as-recorded accelerograms, are investigated. The study has also been performed using maximum values of the time histories resulting from the previous combination of as-recorded time histories. Ratios between these rotation-independent intensity measures and those formerly used in ground motion predictive equations have been computed and modelled by means of a simple theoretical model. Thus, the results are useful for updating former strong ground motion predictive equations in a simple and straightforward way.
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- 2018
16. End-of-life care in Germany: Study design, methods and first results of the EPACS study (Establishment of Hospice and Palliative Care Services in Germany)
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Martini Tanja, Claus Matthias, Unrath Michael, Fischbeck Sabine, Münster Eva, Escobar Pinzón Luis Carlos, and Weber Martin
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Special situations and conditions ,RC952-1245 - Abstract
Abstract Background In order to tackle the deficits in the provision of palliative home care, profound structural changes in the outpatient sector were introduced by law in Germany in 2007. The EPACS study was carried out (Research Accompanying the Establishment of Hospice and Palliative Care Services in Rhineland-Palatinate, Germany) to document the quality of inpatient and outpatient end-of-life care in Rhineland-Palatinate, Germany, before the implementation of these changes. With this article we focus on the study design and methods of the EPACS-Study. We further report first results regarding several aspects of outpatient end-of-life care. Methods The cross-sectional survey was based on a random sample of 5000 inhabitants of Rhineland-Palatinate that had died from May 25 until August 24 of the year 2008. Relatives of these randomly drawn deceased persons were interviewed by means of a written survey. Results The overall response proportion considering only those questionnaires that actually were delivered (n = 3833) was 36.0%. Factors influencing participation were age, sex, and marital status. 355 (25.8%) deceased persons had used professional home care in the four weeks prior to their death, but only very few persons had used a specialised palliative home care service (n = 30; 8.5%). There was a clear gap between the need for specialised outpatient care and the actual utilisation of these services. Conclusions Satisfaction with professional home care was relatively high, but physicians were rated less favourable than nurses. There were deficits especially with respect to physicians' communicative and supportive skills. Further analyses are necessary to provide more detailed information about quality of care in different care settings and for distinct groups. Predictors of good care, as well as obstacles to it, must be further investigated. In the long run, a follow-up survey must be conducted to compare quality of home care before and after the structural changes in Germany.
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- 2010
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17. Reflexiones morales sobre la guerra y la paz en los textos escolares usados después de la Guerra de los Mil Días
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Pérez Pinzón, Luis Rubén
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lcsh:Latin America. Spanish America ,literatur ,literature ,lcsh:F1201-3799 ,guerra ,didactic ,literatura ,Colômbia ,Colombia ,didática ,lcsh:History America ,textos escolares ,textbooks ,war ,lcsh:E-F ,didáctica - Abstract
El artículo analiza la importancia de las inversiones públicas de los vencedores y los esfuerzos editoriales de los vencidos después de la Guerra de los Mil Días para dar a conocer su versión sobre lo acontecido y reafirmar la importancia de los procesos de paz y pacificación nacional. Para ello, se demuestra la importancia que tuvo la incorporación de algunos de esos discursos y representaciones literarios en los textos escolares para los cursos elementales y superiores de lectura en las escuelas y colegios del país acorde al programa oficial. Abstract The article discusses the importance of the victors' public investments and the editorial efforts of the defeated ones after the Thousand Days' War to present their history versions and reaffirm the importance of the processes of peace and national reconciliation. In order to do this, it is demonstrated the importance that the inclusion of some of these speeches and literary representations in textbooks had for elementary and advanced reading courses in local schools according to the official program. O artigo analisa a importância dos investimentos públicos dos vencedores e os esforços editoriais dos vencidos após a Guerra dos Mil Dias para dar a conhecer sua versão sobre o acontecido e reafirmar a importância dos processos de paz e pacificação nacional. Para isso, mostra-se a importância que teve a incorporação de alguns dos discursos e representações literários nos textos escolares para cursos elementares e superiores de leitura nas escolas e colégios do país segundo o programa oficial.
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- 2015
18. Valoración clínica de la reconstrucción del ligamento cruzado anterior (LCA) con autoinjerto de hueso-tendón rotuliano-hueso (HTH) por portal medial
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Muñoz Vargas, Edgar Alberto, Brunicardi Hurtado, Rafael Arturo, Valdivia Loza, Marcelo, Pardo Laverde, Carlos Eduardo, Rincón Plata, Gustavo, Pinzón, Luis Alfonso, and López Betancur, Carlos Esteban
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Ligamento cruzado anterior ,Portal medial ,musculoskeletal system ,Artrómetro ,Artroscopia ,IKD - Abstract
Introducción En la bibliografía se requieren estudios prospectivos que evalúen la evolución postoperatoria de los pacientes con reconstrucción artroscópica del LCA con autoinjerto de HTH, utilizando el portal medial para la perforación del túnel femoral. El objetivo del estudio es describir la evolución funcional de la reconstrucción artroscópica del LCA con autoinjerto ipsilateral rotuliano HTH por portal medial para el tratamiento de la inestabilidad anterolateral de la rodilla. Materiales y métodos Se realizó un estudio observacional de tipo cohorte prospectiva, con un año de seguimiento a 48 pacientes mayores de edad, con lesión aislada del LCA, sin lesiones intraarticulares asociadas, en quienes se realizó reconstrucción artroscópica con autoinjerto ipsilateral HTH por portal medial. La valoración clínica fue realizada con la escala del International Knee Documentation Commitee (IKDC) y la laxitud se valoró con el artrómetro KT-1000®. Resultados La media de edad de los pacientes fue 34,6 años, de los cuales el 68,5% tuvo calificación postoperatoria de A o B de acuerdo con la escala del IKDC y la estabilidad objetiva postoperatoria medida con el artrómetro KT-1000®, que fue considerablemente mejor. Discusión A un año de seguimiento, con la reconstrucción artroscópica por portal medial del LCA utilizando autoinjerto ipsilateral HTH, se obtienen resultados satisfactorios para el paciente y buenos resultados clínicos. Nivel de evidencia clínica Nivel II. Background: There is a lack of prospective series evaluating the post-operative outcome of patients with arthroscopic reconstruction of anterior cruciate ligament (ACL) with patellar bone-tendon-bone (PBTB), using the medial portal for perforation of the femoral tunnel. The objective of the study is to describe the functional outcome of arthroscopic ACL reconstruction with ipsilateral patellar BTB autograft through medial portal for treating anterolateral knee instability. Materials & methods: An observational prospective cohort study was conducted with a one-year follow up of 48 patients with isolated ACL injury without associated intra-articular injuries, in whom arthroscopic reconstruction was performed with an ipsilateral BTB autograft through the medial portal. Clinical assessment was performed using the International Knee Documentation Committee (IKDC) scale, and laxity was assessed with the KT-1000 arthrometer® . Results: The mean age of patients was 34.6 years, and 68.5% of patients had a post-operative grade of A or B according to the IKDC scale, and the objective post-operative stability measured with the KT-1000 arthrometer® was significantly better. Discussion: After one year follow up, ACL reconstruction through medial arthroscopic portal using ipsilateral BPTB autograft showed satisfactory results for the patient and good clinical results for the surgeon. Level of evidence: II.
- Published
- 2017
19. Comment on "Do Directionality Effects Influence Expected Damage? A Case Study of the 2017 Central Mexico Earthquake" by Luis A. Pinzón, Luis G. Pujades, Sergio A. Díaz, and Rodrigo E. Alva.
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Reinoso, Eduardo, Quinde, Pablo, Arroyo, Danny, Ordaz, Mario, Terán-Gilmore, Amador, Pinzón, Luis A., Pujades, Luis G., Diaz, Sergio A., and Alva, Rodrigo E.
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- 2020
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20. Do Directionality Effects Influence Expected Damage? A Case Study of the 2017 Central Mexico Earthquake.
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Pinzón, Luis A., Pujades, Luis G., Diaz, Sergio A., and Alva, Rodrigo E.
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We analyze the case of a building that collapsed in a multifamily complex of Tlalpan borough in Mexico City during the 19 September 2017 Central Mexico earthquake. Despite having similar materials and similar structural and geometric properties, this was the only building that collapsed in the complex. A structural analysis of the building and a study of the soils' predominant periods indicated that resonance effects, if any, would not be significant. However, phenomena related to the anomalous performance of buildings in dense urban areas such as geological soil, soil-structure interaction, and soil-city interaction effects were also investigated. A detailed analysis of the directionality of seismic actions recorded at nearby accelerometric stations and of the azimuths of sound and damaged buildings indicates that directionality effects were responsible for the collapse of the building. Subsequently, a set of 58, two-component acceleration records of the earthquake was used to perform a thorough directionality analysis. The results were then compared with the foreseen uniform hazard response spectra and the design spectra in the city. Seismic actions in the city due to this earthquake were stronger than those corresponding to the uniform hazard response spectra. In addition, although design spectra have been significantly improved in the new 2017 Mexican seismic regulations, they were exceeded in 11 of 58 analyzed spectra. In 4 of these 11 cases, the design spectra were exceeded due to directionality effects. These results confirm the necessity of considering directionality effects in damage assessments, strong-motion prediction equations, and design regulations. [ABSTRACT FROM AUTHOR]
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- 2018
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21. Acral Ischemia Secondary to Pheochromocytoma
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Ríos, Antonio, Pinzón, Luis Felipe, Rodríguez, José Manuel, and Parrilla, Pascual
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- 2018
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22. The Mental Health of Primary Care Physicians in Rhineland-Palatinate, Germany: The Prevalence of Problems and Identification of Possible Risk Factors
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Unrath, Michael, Zeeb, Hajo, Letzel, Stephan, Claus, Matthias, and Pinzón, Luis Carlos Escobar
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Male ,Mental Disorders ,Humans ,Original Article ,Female ,Workload ,Practice Patterns, Physicians' ,Job Satisfaction ,Physicians, Primary Care - Published
- 2012
23. Systemic Intervention for Computer-Supported Collaborative Learning.
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Barros‐Castro, Ricardo A., Midgley, Gerald, and Pinzón, Luis
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COLLABORATIVE learning ,INFORMATION & communication technologies ,PROBLEM solving ability testing ,PROBLEM solving education ,MATHEMATICAL ability in children ,COMPUTER network resources - Abstract
This paper presents a systemic intervention approach as a means to overcome the methodological challenges involved in research into computer-supported collaborative learning applied to the promotion of mathematical problem-solving (CSCL-MPS) skills in schools. These challenges include how to develop an integrated analysis of several aspects of the learning process; and how to reflect on learning purposes, the context of application and participants' identities. The focus of systemic intervention is on processes for thinking through whose views and what issues and values should be considered pertinent in an analysis. Systemic intervention also advocates mixing methods from different traditions to address the purposes of multiple stakeholders. Consequently, a design for CSCL-MPS research is presented that includes several methods. This methodological design is used to analyse and reflect upon both a CSCL-MPS project with Colombian schools, and the identities of the participants in that project. Copyright © 2013 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
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- 2015
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24. Systemic Mediation: Moral Reasoning and Boundaries of Concern.
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Midgley, Gerald and Pinzón, Luis A.
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MEDIATION ,REASONING ,HYPOTHESIS ,ETHICS ,CRITICAL analysis ,REPARATION (Psychoanalysis) - Abstract
This paper outlines a new systemic mediation approach, based on the idea that the most important thing for many participants in mediation is to have their moral reasoning understood and appreciated. This is frequently more important to people than financial reparation. We compare our mediation approach with others to demonstrate that many previous approaches share the assumption that once the interests of a participant have been identified, these should not be questioned. In contrast, our systemic mediation approach encourages participants to explore their own and other people's moral frameworks to enable critical reflection on their interests. Indeed, the concept of an 'interest' can be reframed as the boundary that a participant uses to delimit his or her concerns, and boundaries can be shifted in response to moral reasoning. Our mediation approach aims to generate both personal insights and improvements in mutual understanding. The mediator plays a facilitative role but cannot be neutral: the morality of the mediator unavoidably influences his or her facilitative interventions. Therefore, personal reflection by the mediator on his or her own moral framework is essential, so that its influences can be made visible and the facilitator can thereby be held accountable for them in dialogue with his or her peers. Tools are provided in our systemic mediation approach to support reflection on moral frameworks and boundaries of concern, and a practical example of their use in Colombian mediation practice is provided. Copyright © 2013 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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25. Symptom Prevalence in the Last days of Life in Germany: The Role of Place of Death.
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Pinzón, Luis Carlos Escobar, Claus, Matthias, Zepf, Kirsten Isabel, Fischbeck, Sabine, and Weber, Martin
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- 2012
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26. Factors Influencing Place of Death in Germany
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Escobar Pinzón, Luis Carlos, Weber, Martin, Claus, Matthias, Fischbeck, Sabine, Unrath, Michael, Martini, Tanja, and Münster, Eva
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PLACE of death , *PALLIATIVE treatment , *PUBLIC health , *CROSS-sectional method , *EPIDEMIOLOGY , *FACTOR analysis - Abstract
Abstract: Context: Knowledge about factors influencing the place of death may be very useful for the planning of public health strategies to improve the situation of terminally ill patients. Objectives: The aim of our study was to determine where people died in the German federal state of Rhineland-Palatinate in 2008. We further wanted to detect which factors had an influence on the place of death. Methods: Our cross-sectional survey was based on a random sample of 5000 inhabitants of Rhineland-Palatinate who had died between May 25, 2008 and August 24, 2008. Relatives of these randomly drawn deceased persons were interviewed by means of a written survey. Results: After removing duplicates, 4967 questionnaires were sent out. In total, 3832 questionnaires were delivered and 1378 completed, leading to a response rate of 36.0%. Of this group, 38.2% of the deceased died at home, 39.3% in a hospital, 13.4% in a nursing home, 7.5% in a palliative care facility, and 1.6% elsewhere. Suffering from cancer (adjusted odds ratio [AOR]: 1.30; 95% confidence interval [CI]: 1.01–1.68), social support (AOR being married: 1.33; 95% CI: 1.04–1.70; AOR having a nonworking relative: 1.71; 95% CI: 1.28–2.29), a high care level (AOR Care Level II: 2.79; 95% CI: 2.06–3.79, AOR Care Level III: 4.96; 95% CI: 3.40–7.24), and living in a rural municipality (AOR: 1.36; 95% CI: 1.01–1.84) were major factors favoring home death compared with institutional death. Conclusion: Compared with other European countries, home death is still a frequent event in the federal state of Rhineland-Palatinate. Regional health policy should consider the actual distribution of place of death and corresponding predicting factors when establishing specialized palliative care home services as designed by recent German health legislation. [Copyright &y& Elsevier]
- Published
- 2011
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27. Commuting Accidents in the German Chemical Industry.
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Zepf, Kirsten Isabe, Letze, Stephan, Voelter-Mahlknecht, Susanne, Wriede, Ulrich, Husemann, Britta, and Pinzón, Luis Carlos Escobar
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INDUSTRIAL safety ,WORK-related injuries risk factors ,CHEMICAL industry accidents ,COMMUTING ,RETROSPECTIVE studies ,LOGISTIC regression analysis - Abstract
The article identifies several risk factors for commuting accidents among the employees of a chemical company of Germany. It determines factors influencing the duration of work inability as a result of commuting accidents based on a logistic regression-model developed from retrospective analysis of commuting accidents. It suggests developing group specific prevention strategies in order to reduce the risk underlying these accidents.
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- 2010
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28. End-of-life care in Germany: Study design, methods and first results of the EPACS study (Establishment of Hospice and Palliative Care Services in Germany).
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Pinzón, Luis Carlos Escobar, Münster, Eva, Fischbeck, Sabine, Unrath, Michael, Claus, Matthias, Martini, Tanja, and Weber, Martin
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PALLIATIVE treatment , *THERAPEUTICS , *HOME care services , *HOSPICE care , *NURSING care facilities - Abstract
Background: In order to tackle the deficits in the provision of palliative home care, profound structural changes in the outpatient sector were introduced by law in Germany in 2007. The EPACS study was carried out (Research Accompanying the Establishment of Hospice and Palliative Care Services in Rhineland-Palatinate, Germany) to document the quality of inpatient and outpatient end-of-life care in Rhineland-Palatinate, Germany, before the implementation of these changes. With this article we focus on the study design and methods of the EPACS-Study. We further report first results regarding several aspects of outpatient end-of-life care. Methods: The cross-sectional survey was based on a random sample of 5000 inhabitants of Rhineland-Palatinate that had died from May 25 until August 24 of the year 2008. Relatives of these randomly drawn deceased persons were interviewed by means of a written survey. Results: The overall response proportion considering only those questionnaires that actually were delivered (n = 3833) was 36.0%. Factors influencing participation were age, sex, and marital status. 355 (25.8%) deceased persons had used professional home care in the four weeks prior to their death, but only very few persons had used a specialised palliative home care service (n = 30; 8.5%). There was a clear gap between the need for specialised outpatient care and the actual utilisation of these services. Conclusions: Satisfaction with professional home care was relatively high, but physicians were rated less favourable than nurses. There were deficits especially with respect to physicians' communicative and supportive skills. Further analyses are necessary to provide more detailed information about quality of care in different care settings and for distinct groups. Predictors of good care, as well as obstacles to it, must be further investigated. In the long run, a follow-up survey must be conducted to compare quality of home care before and after the structural changes in Germany. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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29. Developing a systemic model for the evaluation of conflicts<FN>The first draft of this paper was prepared at the Department of Industrial Engineering, Universidad de los Andes, Colombia. </FN><FNR>*</FNR>.
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Pinzón, Luis and Midgley, Gerald
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SYSTEM analysis ,CONFLICT (Psychology) ,SOCIAL conflict ,CONFLICT management ,REDUCTIONISM ,NEGOTIATION - Abstract
This paper aims to challenge reductionist mental models widely used to evaluate the effects of conflicts or disputes. These models are frequently used intuitively by people, or recommended in the dispute resolution literature in fields such as negotiation or mediation. It is argued that they harm people's ability to deal effectively with conflicts and learn from them. The authors propose an alternative systemic framework for evaluating the results of conflicts, which is illustrated by making reference to a severe conflict, the Colombian guerrilla war. This case serves to show the advantages of using the proposed framework instead of more traditional models. Copyright © 2000 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
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- 2000
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30. Leishmaniasis among internally displaced people of Colombia, 2007–2018 – A comparative analysis with the general population.
- Author
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Villamizar-Peña, Rhuvi, Gutiérrez-Ocampo, Estefanía, Holguin-Rivera, Yeimer, Agudelo-Mejia, Karen, Cortes-Gutierrez, Mateo, Sossa-Pinzón, Luis, Calvache-Benavides, Carlos E., Portela-Gaviria, Juan Esteban, Bonilla-Aldana, D. Katterine, Cardona-Ospina, Jaime A., Gutiérrez-Segura, Julio C., González-Colonia, Carlos, Lagos-Grisales, Guillermo J., and Rodriguez-Morales, Alfonso J.
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- 2021
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31. Case Study of a Heavily Damaged Building during the 2016 M W 7.8 Ecuador Earthquake: Directionality Effects in Seismic Actions and Damage Assessment.
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Pinzón, Luis A., Pujades, Luis G., Medranda, Irving, Alva, Rodrigo E., D'Amico, Maria, and Martinez-Frias, Jesus
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EFFECT of earthquakes on buildings , *EARTHQUAKES , *EARTHQUAKE intensity , *CONCRETE construction , *REINFORCED concrete , *EARTHQUAKE damage , *MODAL analysis , *NATURAL disaster warning systems - Abstract
In this work, the directionality effects during the MW 7.8 earthquake, which occurred in Muisne (Ecuador) on 16 April 2016, were analyzed under two perspectives. The first one deals with the influence of these effects on seismic intensity measures (IMs), while the second refers to the assessment of the expected damage of a specific building located in Manta city, Ecuador, as a function of its azimuthal orientation. The records of strong motion in 21 accelerometric stations were used to analyze directionality in seismic actions. At the closest station to the epicenter (RRup = 20 km), the peak ground acceleration was 1380 cm/s2 (EW component of the APED station). A detailed study of the response spectra ratifies the importance of directionality and confirms the need to consider these effects in seismic hazard studies. Differences between IMs values that consider the directionality and those obtained from the as-recorded accelerograms are significant and they agree with studies carried out in other regions. Concerning the variation of the expected damage with respect to the building orientation, a reinforced concrete building, which was seriously affected by the earthquake, was taken as a case study. For this analysis, the accelerograms recorded at a nearby station and detailed structural documentation were used. The ETABS software was used for the structural analysis. Modal and pushover analyses were performed, obtaining capacity curves and capacity spectra in the two main axes of the building. Two advanced methods for damage assessment were used to obtain fragility and mean damage state curves. The performance points were obtained through the linear equivalent approximation. This allows estimation and analysis of the expected mean damage state and the probability of complete damage as functions of the building orientation. Results show that the actual probability of complete damage is close to 60%. This fact is mainly due to the greater severity of the seismic action in one of the two main axes of the building. The results are in accordance with the damage produced by the earthquake in the building and confirm the need to consider the directionality effects in damage and seismic risk assessments. [ABSTRACT FROM AUTHOR]
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- 2021
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32. The production of power and knowledge in mediation.
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Pinzón, Luis Arturo
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- 1996
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33. Seismic performance assessment based on the interstory drift of steel buildings.
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Díaz, Diego Arcos, Diaz, Sergio A., Pinzón, Luis A., Jesús, Hiram, and Mora-Ortiz, Rene S.
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STEEL buildings , *AUTHENTIC assessment , *SEISMIC response , *BUILDING failures , *BUILDING performance , *EARTHQUAKE intensity - Abstract
The seismic regulations for the seismic performance assessment of buildings use the maximum interstory drift, θmax, as a measure to control damage. This article presents a study of the seismic performance based on the θmax for steel buildings using Mexico's regulations and the RISK-UE and HAZUS guidelines. The capacity spectrum method is used to evaluate the performance of buildings with 3 different heights located in 4 cities in Mexico with different seismicity, as well as for soft and rock soil types. The HAZUS criterion is conservative in its assement of damage, while the RISK-UE criterion is more in line with the expected damage. The service state, Sstate, and the collapse prevention state, CPstate, in Mexico's regulations are suitable for damage control, and are consistent with the damage proposed by the RISK-UE guidelines. In very high seismicity zones, the CPstate for seismic actions equal to or greater than the expected, prevent building collapse; however, significant damage to buildings can still occur. The θmax of the CPstate must be established for different seismic intensities and not only for building types. [ABSTRACT FROM AUTHOR]
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- 2022
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34. Dynamic Monitoring of a Mid-Rise Building by Real-Aperture Radar Interferometer: Advantages and Limitations.
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Alva, Rodrigo E., Pujades, Luis G., González-Drigo, Ramón, Luzi, Guido, Caselles, Oriol, and Pinzón, Luis A.
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TUNED mass dampers ,CONCRETE construction ,INTERFEROMETERS ,RADAR ,ACCELEROMETERS ,CONSTRUCTION cost estimates ,FREQUENCIES of oscillating systems - Abstract
In this paper, remote and in situ techniques to estimate the dynamic response of a building to ambient vibration are reported: data acquired through a real-aperture radar (RAR) interferometer and conventional accelerometers are analyzed. A five-story reinforced concrete housing building, which was damaged during the May 11th 2011 Lorca (Spain) earthquake, is used as a case study. The building was monitored using both types of instruments. The dynamic properties of the building are estimated first taking acceleration measurements using a set of 10 high-precision accelerometers installed on the roof of the building. Further, the displacement–time histories, recorded with the RAR device pointing to a corner of the building, are analyzed. Then, the ability and shortcomings of RAR measurements to deal with the fundamental frequencies of vibration of the structure are investigated. The advantages and limitations of from-inside (accelerometric) and from-outside (RAR) measurements are highlighted and discussed. A relevant conclusion is that, after strong earthquakes, RAR may be an interesting and useful tool, as it allows surveying the structural response of mid-rise buildings remotely, without the need to enter the structures, which may be dangerous for inspectors or technicians in cases of severely damaged buildings. Given that the instrumented building suffered significant damage, the ability of these kinds of measurements to detect damage is also discussed. [ABSTRACT FROM AUTHOR]
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- 2020
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35. Seismic Site Classification from the Horizontal-to-Vertical Response Spectral Ratios: Use of the Spanish Strong-Motion Database.
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Pinzón, Luis A., Pujades, Luis G., Macau, Albert, Carreño, Emilio, and Alcalde, Juan M.
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EARTHQUAKE resistant design , *SPECTRAL sensitivity , *EARTHQUAKE intensity , *CLASSIFICATION - Abstract
Normally, the average of the horizontal-to-vertical (H/V) ratios of the 5% damped response spectra of ground motions is used to classify the site of strong-motion stations. In these cases, only the three-orthogonal as-recorded acceleration components are used in the analysis, and all the vector compositions that can generate a different response for each period oscillator are excluded. In this study, the Spanish strong-motion database was used to classify the sites of accelerometric stations based on the predominant periods through the average horizontal-to-vertical spectral ratios (HVSR) of recorded ground motions. Moreover, the directionality effects using the vector composition of the horizontal components of ground motions were also considered in the estimations of H/V ratios. This consideration is a relevant novelty compared to the traditional H/V ratios methods. Only earthquakes with magnitudes above 3.5 and hypocentral distances below 200 km were selected, which resulted in 692 ground-motion records, corresponding to 86 stations, from events in the period between 1993 and 2017. After the analysis, a predominant-period site classification was assigned to each station. On the whole, the obtained mean and standard deviation values of the spectral ratios are comparable to those shown by other researchers. Therefore, the advantages of the proposed procedure, which takes the directionality effects into account, can be summarized as follows: (a) The obtained information is richer and gives enables more sophisticated and realistic analyses on the basis of percentiles and (b) it is easier to detect anomalous stations, sites, and/or accelerograms. Moreover, the method eliminates the effect of directionality as a contributor to epistemic uncertainty. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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36. Biological monitoring of welders exposed to aluminium
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Rossbach, Bernd, Buchta, Mark, Csanády, György A., Filser, Johannes G., Hilla, Wolfgang, Windorfer, Klaus, Stork, Joachim, Zschiesche, Wolfgang, Gefeller, Olaf, Pfahlberg, Annette, Schaller, Karl-Heinz, Egerer, Ellen, Pinzón, Luis Carlos Escobar, and Letzel, Stephan
- Subjects
- *
BIOINDICATORS , *BIOLOGICAL monitoring , *BIOMARKERS , *TOXICOLOGY - Abstract
Abstract: To evaluate an adequate strategy for biological monitoring of aluminium (Al), a group of 62 Al welders (age in 1999: 23–51 years, median 35 years) was surveyed annually from 1999 to 2003 by determination of pre- and post-shift Al in urine and plasma. Biomonitoring was supplemented by personal air measurements of the total dust concentration. The welders’ internal exposure was compared to the exposure of 60 non-exposed assembly workers (age in 1999: 21–51 years, median: 36 years) who were surveyed in 1999, 2001 and 2003. Having a nearly constant dust exposure, median concentrations of Al in urine (Al in plasma) of the welders decreased from 40.1μg/g to 19.8μg/g creatinine (8.7 to 4.6μg/l). For the control group the median levels of Al in urine (plasma) ranged from 4.8μg/g to 5.2μg/g creatinine (2.4–4.3μg/l) indicating a higher sensitivity for the marker Al in urine. No systematic differences have been found between pre- and post-shift internal exposure. This might be caused by the slow elimination kinetics and low systemic bioavailability of Al. A correlation analysis did not yield close relationships between dust exposure, Al in plasma and Al in urine underlining the importance of biomonitoring for assessment of Al exposure. [Copyright &y& Elsevier]
- Published
- 2006
- Full Text
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