Search

Your search keyword '"Castano, Andres"' showing total 43 results
Start Over Author "Castano, Andres"
43 results on '"Castano, Andres"'

3. In-situ Visualization of the Propagation of the Electric Potential in a Human Atrial Model Using GPU

Author

Osorio, John H., Castano, Andres P., Henao, Oscar, Hincapie, Juan, Barbosa, Simone Diniz Junqueira, Editorial Board Member, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Yuan, Junsong, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Washio, Takashi, Founding Editor, Meneses, Esteban, editor, Castro, Harold, editor, Barrios Hernández, Carlos Jaime, editor, and Ramos-Pollan, Raul, editor

Published
2019
Full Text
View/download PDF

10. Educación popular y pedagogías críticas en América Latina y el Caribe : corrientes emancipatorias para la educación pública del Siglo XXI

Author

Guelman, Anahí, Cabaluz, Fabián, Salazar, Mónica, Quintar, Estela, Cappellacci, Inés, Loyola, Claudia, Palumbo, María Mercedes, Said, Shirly, Tarrio, Laura, De Alarcón, Silvya, Areyuna, Beatríz, Zurita, Felipe, Piedrahita, Jonathan, Giraldo, Yicel, Guzmán, Cindy, Pino, Yolanda, Castaño, Andrés, Ospina, Héctor Fabio, Valencia, Piedad Ortega, Bustamante, María Teresa Cruz, Hernández, Juan Carlos, Chévez, Cándida, Aquino, Ariana Celeste, Pérez, Suyapa, Streck, Danilo R., Carrillo, Alfonso Torres, Ghiso, Alfredo Manuel, Holliday, Oscar Jara, Guelman, Anahí, Cabaluz, Fabián, Salazar, Mónica, Quintar, Estela, Cappellacci, Inés, Loyola, Claudia, Palumbo, María Mercedes, Said, Shirly, Tarrio, Laura, De Alarcón, Silvya, Areyuna, Beatríz, Zurita, Felipe, Piedrahita, Jonathan, Giraldo, Yicel, Guzmán, Cindy, Pino, Yolanda, Castaño, Andrés, Ospina, Héctor Fabio, Valencia, Piedad Ortega, Bustamante, María Teresa Cruz, Hernández, Juan Carlos, Chévez, Cándida, Aquino, Ariana Celeste, Pérez, Suyapa, Streck, Danilo R., Carrillo, Alfonso Torres, Ghiso, Alfredo Manuel, and Holliday, Oscar Jara

Published
2018
Full Text
View/download PDF

11. Surgical site infection in abdominal trauma patients: risk prediction and performance of the NNIS and SENIC indexes

Author

Morales, Carlos H., Escobar, Rene M., Villegas, Maria I., Castano, Andres, and Trujillo, Juliana

Subjects
Surgical wound infections -- Patient outcomes -- Care and treatment, Health, Health care industry
Abstract

Background: The National Nosocomial Infections Surveillance (NNIS) and Efficacy of Nosocomial Infection Control (SENIC) indexes are designed to develop control strategies and to reduce morbidity and mortality rates resulting from infections in surgical patients. We sought to assess the application of these indexes in patients undergoing surgery for abdominal trauma and to develop an alternative model to predict surgical site infections (SSIs). Methods: We conducted a prospective cohort study between November 2000 and March 2002. The main outcome measure was SSIs. We evaluated the variables included in the NNIS and SENIC indexes and some preoperative, intraoperative and postoperative variables that could be risk factors related to the development of SSIs. We performed multivariate analyses using a forward logistic regression method. Finally, we assessed infection risk prediction, comparing the estimated probabilities with actual occurrence using the areas under the receiver operating characteristic (ROC) curves. Results: Overall, 614 patients underwent an exploratory laparotomy. Of these, 85 (13.8%) experienced deep incisional and organ/intra-abdominal SSIs. The independent variables associated with this complication were an Abdominal Trauma Index score greater than 24, abdominal contamination and admission to the intensive care unit. We proposed a model for predicting deep incisional and organ/ intra-abdominal SSIs using these variables (alternative model). The areas under the ROC curves were compared using the estimated probabilities for this alternative model and for the NNIS and SENIC scores. The analysis revealed a greater area under the ROC curve for the alternative model. The NNIS and SENIC scores did not perform as well as the alternative model in patients with abdominal trauma. Conclusion: The NNIS and SENIC indexes were inferior to the proposed alternative model for predicting SSIs in patients undergoing surgery for abdominal trauma. Contexte: Les indices du systeme national de surveillance des infections nosocomiales (National Nosocomial Infections Surveillance--NNIS) et d'efficacite du controle des infections nosocomiales (Efficacy of Nosocomial Infection Control -SENIC) sont concus pour aider a elaborer des strategies de controle et reduire les taux de morbidite et de mortalite causes par les infections chez les patients en chirurgie. Nous avons cherche a evaluer l'application de ces indices chez les patients qui subissent une intervention chirurgicale pour un traumatisme abdominal et a creer un modele de rechange pour predire les infections des sites chirurgicaux (ISC). Methodes: Nous avons procede a une etude de cohorte prospective entre novembre 2000 et mars 2002. Les ISC ont constitue la principale mesure de resultats. Nous avons evalue les variables incluses dans les indices NNIS et SENIC et des variables preoperatoires, perioperatoires et postoperatoires qui pourraient constituer des facteurs de risque relies a l'apparition des ISC. Nous avons procede a des analyses multivariees en utilisant une methode de regression logistique prospective. Nous avons enfin evalue la prediction du risque d'infection, en comparant les probabilites calculees aux occurrences reelles, en utilisant les aires couvertes par les courbes des caracteristiques de fonctionnement du recepteur (receiver operating characteristic--ROC). Resultats: Dans l'ensemble, 614 patients ont subi une laparotomie exploratoire et 85 (13,8%) d'entre eux ont ete atteints d'une ISC au niveau de l'incision profonde et des organes ou a l'interieur de l'abdomen. Les variables independantes associees a cette complication etaient les suivantes: indice du traumatisme abdominal de plus de 24, contamination abdominale et admission aux soins intensifs. Nous avons propose un modele de prediction des ISC des incisions profondes et des organes ou de l'interieur de l'abdomen en utilisant ces variables (modele de rechange). Nous avons compare les zones qui se trouvaient sous les courbes ROC en utilisant les probabilites calculees pour ce modele de rechange et pour les indices NNIS et SENIC. L'analyse a revele que l'aire qui se trouvait sous la courbe ROC etait plus etendue dans le cas du modele de rechange. Les scores NNIS et SENIC n'ont pas donne d'aussi bons resultats que le modele de rechange chez les patients atteints d'un traumatisme abdominal. Conclusion: Les indices NNIS et SENIC ont donne de moins bons resultats que le modele de rechange propose pour predire les ISC chez les patients qui subissent une intervention chirurgicale pour un traumatisme a l'abdomen., Surgical site infection (SSI) is one of the most common postoperative events, (1) with a reported incidence of 37%. (2,3) The high incidence of abdominal trauma requires knowledge not only [...]

Published
2011
Full Text
View/download PDF

13. 44 - MANEJO TERAPÉUTICO Y RIESGO DE COLECTOMÍA EN PACIENTES CON COLITIS ULCEROSA AGUDA GRAVE EXPUESTOS PREVIAMENTE A FÁRMACOS ANTI-TNF. ESTUDIO DE COHORTES DE GETECCU

Author

Mesonero, Francisco, López-García, Alicia, Miranda-Bautista, José, de Célix, Cristina Rubín, Marín-Jiménez, Ignacio, Suárez, Cristina, Cardona, Albert Martín, Fuentes, Esteban, Mínguez, Alejandro, Castaño, Andrés, Roig, Cristina, Fernández-Clotet, Agnès, Gargallo-Puyuelo, Carla Jerusalén, Herrero, Begoña Álvarez, García, María José, Segarra-Ortega, José Xavier, del Carmen Rodríguez-Grau, María, Romero-Salazar, Francisco López, Omella, Ignacio, Martín-Rodríguez, Daniel, Vivo, María González, Ponferrada, Ángel, Bastón-Rey, Iria, Benítez, José Manuel, Reygosa, Cristina, González, Ernesto Alejandro Lastiri, Delgado-Guillena, Pedro Genaro, Torrealba, Leyanira, Hernández-Camba, Alejandro, Bernal, Lorena, Piñero, Gisela, Hospital, Eduard Brunet, Irabien, Martín, Marquès-Camí, Miquel, Zabana, Yamile, and Gutiérrez, Ana

Published
2023
Full Text
View/download PDF

15. Tu1904 USE OF MYCOPHENOLATE MOFETIL IN INFLAMMATORY BOWEL DISEASE: RESULTS FROM ENEIDA REGISTRY

Author

Camba, Alejandro Hernandez, primary, Hernández, Laura Arranz, additional, Vera, Isabel, additional, Carpio, Daniel, additional, Calafat, Margalida, additional, Lucendo, Alfredo, additional, Samso, Carlos Taxonera, additional, Pedrosa, Sandra Marín, additional, Garcia, María José, additional, Surís, Gerard, additional, Rodríguez, Eugenia Sánchez, additional, López, Ana Y. Carbajo, additional, De Castro, Luisa, additional, Iborra, Marisa, additional, Cardona, Albert Martin, additional, Rodríguez-Lago, Iago, additional, Busquets, David, additional, Bertoletti, Federico, additional, Sierra-Ausin, Monica, additional, Tardillo, Carlos, additional, Huguet, José María, additional, Bujanda, Luis, additional, Castano, Andres, additional, Ochoa, Olga Merino, additional, Domènech, Eugeni, additional, and Ramos, Laura, additional

Published
2020
Full Text
View/download PDF

16. Results from Automated Cloud and Dust Devil Detection Onboard the MER

Author

Chien, Steve, Castano, Rebecca, Bornstein, Benjamin, Fukunaga, Alex, Castano, Andres, Biesiadecki, Jeffrey, Greeley, Ron, Whelley, Patrick, and Lemmon, Mark

Subjects
Lunar And Planetary Science And Exploration
Abstract

We describe a new capability to automatically detect dust devils and clouds in imagery onboard rovers, enabling downlink of just the images with the targets or only portions of the images containing the targets. Previously, the MER rovers conducted campaigns to image dust devils and clouds by commanding a set of images be collected at fixed times and downloading the entire image set. By increasing the efficiency of the campaigns, more campaigns can be executed. Software for these new capabilities was developed, tested, integrated, uploaded, and operationally checked out on both rovers as part of the R9.2 software upgrade. In April 2007 on Sol 1147 a dust devil was automatically detected onboard the Spirit rover for the first time. We discuss the operational usage of the capability and present initial dust devil results showing how this preliminary application has demonstrated the feasibility and potential benefits of the approach.

Published
2008

17. Autonomous Detection of Dust Devils and Clouds on Mars

Author

Castano, Andres, Fukunaga, Alex, Biesiadecki, Jeffrey, Neakrase, Lynn, Whelley, Patrick, Greeley, Ronald, Lemmon, Mark, Castano, Rebecca, and Chien, Steve

Subjects
Space Sciences (General)
Abstract

Acquisition of science in space applications is shifting from teleoperated gathering to an automated on-board analysis with improvements in the use of on-board memory, CPU, bandwidth and data quality. In this paper, we describe algorithms to autonomously detect dust devils and clouds from a rover and summarize the results. These algorithms meet high hit-to-miss ratios and satisfy strict requirements of CPU, memory usage and bandwidth. The detectors have been scheduled for upload to the Mars Exploration Rovers (MER) in 2006. These are the first autonomous science processes in the rovers.

Published
2006

18. Opportunistic Planning and Execution for Planetary Exploration

Author

Gaines, Daniel M, Estlin, Tara, Chouinard, Caroline, Castano, Rebecca, Castano, Andres, Bornstein, Ben, Anderson, Robert C, Judd, Michele, Nesnas, Issa, and Rabideau, Gregg

Subjects
Lunar And Planetary Science And Exploration
Abstract

We are developing technologies to increase the autonomous capabilities of future rover missions. Our objectives are to make rovers easier to command and to enable them to make more effective use of rover resources when problems arise or when things go better than expected. We will demonstrate OASIS (Onboard Analysis Science Investigation System) which combined planning and scheduling techniques with machine learning to enable rovers to perform robust and opportunistic science operations.

Published
2006

20. Semi-Automated Identification of Rocks in Images

Author

Bornstein, Benjamin, Castano, Andres, and Anderson, Robert

Subjects
Electronics And Electrical Engineering
Abstract

Rock Identification Toolkit Suite is a computer program that assists users in identifying and characterizing rocks shown in images returned by the Mars Explorer Rover mission. Included in the program are components for automated finding of rocks, interactive adjustments of outlines of rocks, active contouring of rocks, and automated analysis of shapes in two dimensions. The program assists users in evaluating the surface properties of rocks and soil and reports basic properties of rocks. The program requires either the Mac OS X operating system running on a G4 (or more capable) processor or a Linux operating system running on a Pentium (or more capable) processor, plus at least 128MB of random-access memory.

Published
2006

22. Current results from a Rover Science Data Analysis System

Author

Castano, Rebecca, Judd, Michele, Estlin, Tara, Anderson, Robert C, Gaines, Daniel, Castano, Andres, Bornstein, Ben, Stough, Tim, and Wagstaff, Kiri

Abstract

In this paper, we provide a brief overview of the OASIS system, and then describe our recent successes in integrating with and using rover hardware. OASIS currently works in a closed loop fashion with onboard control software (e.g., navigation and vision) and has the ability to autonomously perform the following sequence of steps: analyze gray scale images to find rocks, extract the properties of the rocks, identify rocks of interest, retask the rover to take additional imagery of the identified target and then allow the rover to continue on its original mission. We also describe the early 2004 ground test validation of specific OASIS components on selected Mars Exploration Rover (MER) images. These components include the rockfinding algorithm, RockIT, and the rock size feature extraction code. Our team also developed the RockIT GUI, an interface that allows users to easily visualize and modify the rock-finder results. This interface has allowed us to conduct preliminary testing and validation of the rockfinder's performance.

Published
2005

23. Visual compliance: task-directed visual servo control

Author

Castano, Andres and Hutchinson, Seth

Subjects
Incremental motion control -- Research, Optical data processing -- Research
Abstract

This paper introduces visual compliance, a new vision-based control scheme that lends itself to task-level specification of manipulation goals. Visual compliance is effected by a hybrid vision/position control structure. Specifically, the two degrees of freedom parallel to the image plane of a supervisory camera are controlled using visual feedback, and the remaining degree of freedom (perpendicular to the camera image plane) is controlled using position feedback provided by the robot joint encoders. With visual compliance, the motion of the end effector is constrained so that the tool center of the end effector maintains "contact" with a specified projection ray of the imaging system. This type of constrained motion can be exploited for grasping, parts mating, and assembly. We begin by deriving the projection equations for the vision system. We then derive equations used to position the manipulator prior to the execution of visual compliant motion. Following this, we derive the hybrid Jacobian matrix that is used to effect visual compliance. Experimental results are given for a number of scenarios, including grasping using visual compliance.

Published
1994

24. Intensity-based rock detection for acquiring onboard rover science

Author

Judd, Michele, Estlin, Tara, Castano, Rebecca, Anderson, Robert, and Castano, Andres

Abstract

Missions to Mars already under study call for very long autonomous traverses (on the order of hundreds of meters per sol) during which there will be limited contact with Earth. The onboard Autonomous Science Investigation System (OASIS) is a technology for increasing science return during rover traverses by prioritizing science opportunities. By prioritizing data for downlink onboard, it is expected that the set of images selected for downlink by OASIS will have a consistently higher scientific interest then any set of equal number of images of the same traverse obtained using random or periodic sampling. Thus, OASIS can be used to increase the science returned from a long traverse. OASIS prioritizes data and identifies science opportunities by extracting information from image data and then using this information to prioritize the data and identify potential new science opportunities. Currently, the information extracted from the images is the location of the rocks in the image and several properties of these rocks such as size, albedo, texture and shape, In this paper we give an overview of the role of rock detection in the OASIS system and describe the functionality of the rock detector. We then present results on representative images

Published
2004

26. Obstacle detection in foliage with ladar and radar

Author

Matthies, Larry, Bergh, Chuck, Castano, Andres, Macedo, Jose, and Manduchi, Roberto

Subjects
Communications And Radar
Abstract

Autonomous off-road navigation is central to several important applications of unmanned ground vehicles. This requires the ability to detect obstacles in vegetation. We examine the prospects for doing so with scanning ladar and with a linear array of 2.2 GHz micro-impulse radar transceivers. For ladar, we summarize our work to date on algorithms for detecting obstacles in tall grass with single-axis ladar, then present a simple probabilistic model of the distance into tall grass that ladar-based obstacle detection is possible.

Published
2003

27. Ladar System Identifies Obstacles Partly Hidden by Grass

Author

Castano, Andres

Subjects
Man/System Technology And Life Support
Abstract

A ladar-based system now undergoing development is intended to enable an autonomous mobile robot in an outdoor environment to avoid moving toward trees, large rocks, and other obstacles that are partly hidden by tall grass. The design of the system incorporates the assumption that the robot is capable of moving through grass and provides for discrimination between grass and obstacles on the basis of geometric properties extracted from ladar readings as described below. The system (see figure) includes a ladar system that projects a range-measuring pulsed laser beam that has a small angular width of radians and is capable of measuring distances of reflective objects from a minimum of dmin to a maximum of dmax. The system is equipped with a rotating mirror that scans the beam through a relatively wide angular range of in a horizontal plane at a suitable small height above the ground. Successive scans are performed at time intervals of seconds. During each scan, the laser beam is fired at relatively small angular intervals of radians to make range measurements, so that the total number of range measurements acquired in a scan is Ne = / .

Published
2003

28. Consecuencias sociales que genera el desarraigo familiar en la población infantil femenina entre 6 y 12 años ubicada por ICBF en el Instituto Hermanas Franciscanas de Santa Clara Municipio de Copacabana, año 2012. Una interpretación conceptual desde el trabajo social

Author

Bustamante Villa, Jessica, Sanchez Castano, Andres, Gaviria Arango, Tatiana, and Cano, Juan Guillermo

Subjects
Desarrollo de la comunidad, Psicología infantil, PSICOLOGÍA INFANTIL (1A. INFANCIA), Asistencia social con los niños, TRABAJO SOCIAL CON NIÑOS
Abstract

Esta investigación pretende identificar los factores de incidencia del desarraigo familiar en la población infantil femenina del Instituto Hermanas Franciscanas de Santa Clara tomando como elementos para este el paradigma fenomenológico hermenéutico el cual pretende tener una orientación que permita más allá de interpretar, contribuir a la transformación social de dicha población. El tipo de investigación implementada es la investigación-acción como una forma de estudiar, de explorar esta situación social, con la finalidad de mejorarla, todo esto enmarcado desde un enfoque cualitativo porque a través de este se puede tener un acercamiento más directo con el contexto desde una perspectiva holística, contribuyendo todo esto al desarrollo de esta investigación. El objeto de investigación abordado son las menores entre 6 y 12 años adscritas al Instituto Hermanas Franciscanas de Santa Clara,siendo la infancia el periodo comprendido entre el momento del nacimiento y los 12 años de edad. Esta primera etapa de vida es fundamental en su desarrollo, de ella dependerá la evolución de características físicas, motrices, capacidades lingüísticas y socio afectivas. Este periodo debe caracterizarse por brindar espacios como la familia y la escuela, en donde puedan crecer fuertes y seguros de sí mismos, recibir el amor y estimulo de sus familias y de una comunidad, dispuesta a protegerlos Corporación Universitaria Minuto de Dios

Published
2014

29. THREE ESSAYS ON IMMIGRATION AND AGRICULTURAL ECONOMICS

Author

Castano, Andres

Subjects
Auction, Chocolate, Colombia, Fiscal costs, Internal mobility, Venezuelan immigration
Abstract

Even though 35% of the migration is between developing countries, most of the literature on the impact of international migration on natives' fiscal contributions and internal mobility decisions is concentrated among OECD countries. In this dissertation, in the first two chapters, I investigate the effects of the arrival of Venezuelan immigrants to Colombia on the fiscal contributions and internal mobility of natives. The third chapter explores the potential for chocolate made from CCN-51 to substitute high-quality chocolate. In the first chapter, along with Carlos Mesa Guerra, we reexamine the effect of immigration on public finances by accounting for second-order effects. We exploit exogenous variation in immigration across Colombian metropolitan areas between 2013 and 2018, resulting from the significant increase in Venezuelan immigrants and instrument immigrants’ residential locations using pre-existing settlement patterns and the distance between origin-destination flows. Our findings indicate that immigration did not reduce natives’ average fiscal contributions. In the second chapter, I exploit plausible exogenous variation in immigration from Venezuela across Colombian states to study the effect of changes in immigration inflows on changes in natives’ net migration rates and their components (in and out-migration rates) between 2014-2019. I found no evidence that immigration from Venezuela induces changes in net-migration rates across Colombian states. I also found evidence that although changes in immigration rates are positively associated with natives’ out-migration and negatively associated with natives’ in-migration rates, the effects are not distinguishable from zero once confidence sets robust to weak instruments are constructed. In the third chapter, I used an auction experiment to study the hedonic properties and the factors affecting the WTP for Ecuadorian chocolate produced with different cacao, including the CCN-51 cacao hybrid. We find that smell ratings favored the highest quality cacao compared to the CCN-51 hybrid; however, there were no differences in taste ratings. We also found no difference in mean WTP between the national variety and the CCN-51 cacao hybrid, even when information on the quality and nutritional value of the cacao was provided. Results suggest that the expansion in the use of CCN-51 cacao in chocolate production is a plausible alternative to deal with the potential shortage of chocolate.

Published
2023

30. Onboard Autonomous Rover Science

Author

Castano, Rebecca, Estlin, Tara, Gaines, Dan, Chouinard, Caroline, Bornstein, Ben, Anderson, Robert C., Burl, Michael, Thompson, David, Castano, Andres, Judd, Michele, Castano, Rebecca, Estlin, Tara, Gaines, Dan, Chouinard, Caroline, Bornstein, Ben, Anderson, Robert C., Burl, Michael, Thompson, David, Castano, Andres, and Judd, Michele

Abstract

The Onboard Autonomous Science Investigation System (OASIS) was used in the first formal demonstration of closed loop opportunistic detection and reaction during a rover traverse on the FIDO rover at NASA's Jet Propulsion Laboratory. In addition to hardware demonstrations, the system has been demonstrated and exercised in simulation using the Rover Analysis, Modeling, and Simulation (ROAMS) planetary rover simulator, A. Jain et al (2003). We discuss several system enhancements including new planning and scheduling capabilities and image prioritization. We also describe the new end-of-traverse capability that includes taking a partial panorama of images, assessing these for targets of interest, and collecting narrow angle images of selected targets. Finally, we present several methods for estimating properties of rocks and provide a comparative assessment. Understanding the relationship of these methods is important to correctly interpret autonomous rock analyses performed during a traverse.

Published
2007

31. Opportunistic Rover Science: Finding and Reacting to Rocks, Clouds and Dust Devils

Author

Castano, Rebecca, Estlin, Tara, Gaines, Daniel, Castano, Andres, Chouinard, Caroline, Bornstein, Ben, Anderson, Robert C., Chien, Steve, Fukunaga, Alex, Judd, Michele, Castano, Rebecca, Estlin, Tara, Gaines, Daniel, Castano, Andres, Chouinard, Caroline, Bornstein, Ben, Anderson, Robert C., Chien, Steve, Fukunaga, Alex, and Judd, Michele

Abstract

The goal of the Onboard Autonomous Science Investigation System (OASIS) project at NASA's Jet Propulsion Laboratory (JPL) is to evaluate, and autonomously act upon, science data gathered by in-situ spacecraft, such as planetary landers and rovers. Using the FIDO rover in the Mars yard at JPL, we have successfully demonstrated a closed loop system test of the rover acquiring image data, finding rocks in the image, analyzing rock properties and identifying rocks that merit further investigation. When the system on the rover alerts the rover to take additional measurements of interesting rocks, the planning and scheduling component determines if there are enough resources to meet this additional science data request. The rover is then instructed to either turn toward the rock, or to actually move closer to the rock to take an additional, close up, picture. In addition to these hardware integration successes, the OASIS team has also continued its autonomous science research by collaboratively working with other scientists and technologists to identify and react to other scientific phenomena - such as clouds and dust devils. Prototype dust devil and cloud detection algorithms were delivered to an infusion task which has refined the algorithms specifically for Mars exploration rovers (MER) and is integrating the code into the next release of MER flight software.

Published
2006

32. Automatic detection of dust devils and clouds on Mars

Author

Castano, Andres, primary, Fukunaga, Alex, additional, Biesiadecki, Jeffrey, additional, Neakrase, Lynn, additional, Whelley, Patrick, additional, Greeley, Ronald, additional, Lemmon, Mark, additional, Castano, Rebecca, additional, and Chien, Steve, additional

Published
2007
Full Text
View/download PDF

33. Onboard Autonomous Rover Science

Author

Castano, Rebecca, primary, Estlin, Tara, additional, Gaines, Dan, additional, Chouinard, Caroline, additional, Bornstein, Ben, additional, Anderson, Robert C., additional, Burl, Michael, additional, Thompson, David, additional, Castano, Andres, additional, and Judd, Michele, additional

Published
2007
Full Text
View/download PDF

35. Autonomous Detection of Dust Devils and Clouds on Mars

Author

Castano, Andres, primary, Fukunaga, Alex, additional, Biesiadecki, Jeffrey, additional, Neakrase, Lynn, additional, Whelley, Patrick, additional, Greeley, Ronald, additional, Lemmon, Mark, additional, Castano, Rebecca, additional, and Chien, Steve, additional

Published
2006
Full Text
View/download PDF

36. Obstacle Detection in Foliage with Ladar and Radar.

Author

Dario, Paolo, Chatila, Raja, Matthies, Larry, Bergh, Chuck, Castano, Andres, Macedo, Jose, and Manduchi, Roberto

Abstract

Autonomous off-road navigation is central to several important applications of unmanned ground vehicles. This requires the ability to detect obstacles in vegetation. We examine the prospects for doing so with scanning ladar and with a linear array of 2.2 GHz micro-impulse radar transceivers. For ladar, we summarize our work to date on algorithms for detecting obstacles in tall grass with single-axis ladar, then present a simple probabilistic model of the distance into tall grass that ladar-based obstacle detection is possible. This model indicates that the ladar "penetration depth" can range from on the order of 10 cm to several meters, depending on the plant type. We also present an experimental investigation of mixed pixel phenomenology for a time-of-flight, SICK ladar and discuss briefly how this bears on the problem. For radar, we show results of applying an existing algorithm for multi-frequency diffraction tomography to a set of 45 scans taken with one sensor translating laterally 4 cm/scan to mimic a linear array of transceivers. This produces a high resolution, 2-D map of scattering surfaces in front of the array and clearly reveals a large tree trunk behind over 2.5 m of thick foliage. Both types of sensor warrant further development and exploitation for this problem. [ABSTRACT FROM AUTHOR]

Published
2005
Full Text
View/download PDF

42. Extrahepatic Autoimmune Comorbidities in Patients with Primary Biliary Cholangitis. Lack of Association with Prognosis and Therapeutic Response to Ursodeoxycholic Acid

Author

Reig, Anna, Llovet, Laura Patricia, Romero-Gomez, Manuel, Albillos, Agustin, Royuela, Federico Manuel Saez, Fabrega, Emilio, Salmeron, Francisco Javier, Gallego, Adolfo, Horta, Diana, Carrion, Jose Antonio, Andrade, Raul J., Sala, Margarita, Castano, Andres, Gomez-Dominguez, Elena, Conde, Isabel, Conde, Marta Hernandez, Chahri, Nadia, Estevez, Pamela, Diago, Moises, Gonzalez, Jesus M., and Albert Pares

43. Impact of Biological Agents on Postsurgical Complications in Inflammatory Bowel Disease: A Multicentre Study of Geteccu

Author

García, M. J., Rivero, M., Miranda-Bautista, J., Bastón-Rey, I., Mesonero, F., Leo-Carnerero, E., Casas-Deza, D., Cagigas Fernández, C., Martin-Cardona, A., El Hajra, I., Hernández-Aretxabaleta, N., Pérez-Martínez, I., Fuentes-Valenzuela, E., Jiménez, N., Rubin de Célix, C., Gutiérrez, A., Suárez Ferrer, C., Huguet, J. M., Fernández-Clotet, A., González-Vivó, M., Del Val, B., Castro-Poceiro, J., Melcarne, L., Dueñas, C., Izquierdo, M., Monfort, D., Bouhmidi, A., Ramírez de la Piscina, P., Romero, E., Molina, G., Zorrilla, J., Calvino-Suárez, C., Sánchez, E., Núñez, A., Sierra, O., Castro, B., Zabana, Y., González-Partida, I., De la Maza, S., Castaño, A., Nájera-Muñoz, R., Sánchez-Guillén, L., Riat Castro, M., Rueda, J. L., Benítez, J. M., Delgado-Guillena, P., Tardillo, C., Peña, E., Frago-Larramona, S., Rodríguez-Grau. M. C., Plaza, R., Pérez-Galindo, P., Martínez-Cadilla, J., Menchén, L., Barreiro-De Acosta, M., Sánchez-Aldehuelo, R., De la Cruz, M. D., Lamuela, L. J., Marín, I., Nieto-García, L., López San Román, A., Herrera, J. M., Chaparro, M., Gisbert, J. P., Young Group of GETECCU, [García MJ, Rivero M] Gastroenterology Department, Hospital Universitario Marqués de Valdecilla, Universidad de Cantabria, Instituto de Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain. [Miranda-Bautista J] Gastroenterology Department, Hospital Universitario Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), and Departamento de Medicina, Universidad Complutense, Madrid, Spain. [Bastón-Rey I] Gastroenterology Department, Hospital Universitario Clínico de Santiago, Santiago de Compostela, Spain. [Mesonero F] Gastroenterology Department, Hospital Universitario Ramón y Cajal, Madrid, Spain. [Leo-Carnerero E] Gastroenterology Department, Hospital Universitario Virgen del Rocío, Sevilla, Spain. [Delgado-Guillena P] Gastroenterology Department, Hospital General de Granollers, Granollers, Spain, Hospital General de Granollers, [Jose Garcia, Maria] Univ Cantabria, Hosp Univ Marques de Valdecilla, Inst Invest Sanitaria Valdecilla IDIVAL, Gastroenterol Dept, Santander 37008, Spain, [Rivero, Montserrat] Univ Cantabria, Hosp Univ Marques de Valdecilla, Inst Invest Sanitaria Valdecilla IDIVAL, Gastroenterol Dept, Santander 37008, Spain, [Castro, Beatriz] Univ Cantabria, Hosp Univ Marques de Valdecilla, Inst Invest Sanitaria Valdecilla IDIVAL, Gastroenterol Dept, Santander 37008, Spain, [Miranda-Bautista, Jose] Univ Complutense, Hosp Univ Gregorio Maranon, Inst Invest Sanitaria Gregorio Maranon IiSGM, Gastroenterol Dept, Madrid 28009, Spain, [Menchen, Luis] Univ Complutense, Hosp Univ Gregorio Maranon, Inst Invest Sanitaria Gregorio Maranon IiSGM, Gastroenterol Dept, Madrid 28009, Spain, [Marin, Ignacio] Univ Complutense, Hosp Univ Gregorio Maranon, Inst Invest Sanitaria Gregorio Maranon IiSGM, Gastroenterol Dept, Madrid 28009, Spain, [Miranda-Bautista, Jose] Univ Complutense, Dept Med, Madrid 28009, Spain, [Menchen, Luis] Univ Complutense, Dept Med, Madrid 28009, Spain, [Marin, Ignacio] Univ Complutense, Dept Med, Madrid 28009, Spain, [Baston-Rey, Iria] Hosp Univ Clin Santiago, Gastroenterol Dept, Santiago De Compostela 15706, Spain, [Calvino-Suarez, Cristina] Hosp Univ Clin Santiago, Gastroenterol Dept, Santiago De Compostela 15706, Spain, [Barreiro-De Acosta, Manuel] Hosp Univ Clin Santiago, Gastroenterol Dept, Santiago De Compostela 15706, Spain, [Nieto-Garcia, Laura] Hosp Univ Clin Santiago, Gastroenterol Dept, Santiago De Compostela 15706, Spain, [Mesonero, Francisco] Hosp Univ Ramon y Cajal, Gastroenterol Dept, Madrid 28034, Spain, [Sanchez, Eugenia] Hosp Univ Ramon y Cajal, Gastroenterol Dept, Madrid 28034, Spain, [Sanchez-Aldehuelo, Ruben] Hosp Univ Ramon y Cajal, Gastroenterol Dept, Madrid 28034, Spain, [Lopez-San Roman, Antonio] Hosp Univ Ramon y Cajal, Gastroenterol Dept, Madrid 28034, Spain, [Leo-Carnerero, Eduardo] Hosp Univ Virgen del Rocio, Gastroenterol Dept, Seville 41013, Spain, [Nunez, Andrea] Hosp Univ Virgen del Rocio, Gastroenterol Dept, Seville 41013, Spain, [Dolores De la Cruz, Maria] Hosp Univ Virgen del Rocio, Gastroenterol Dept, Seville 41013, Spain, [Manuel Herrera, Jose] Hosp Univ Virgen del Rocio, Gastroenterol Dept, Seville 41013, Spain, [Casas-Deza, Diego] Hosp Univ Miguel Servet, Inst Invest Sanitaria Aragon IISA, Gastroenterol Dept, Zaragoza 50009, Spain, [Sierra, Olivia] Hosp Univ Miguel Servet, Inst Invest Sanitaria Aragon IISA, Gastroenterol Dept, Zaragoza 50009, Spain, [Javier Lamuela, Luis] Hosp Univ Miguel Servet, Inst Invest Sanitaria Aragon IISA, Gastroenterol Dept, Zaragoza 50009, Spain, [Cagigas Fernandez, Carmen] Hosp Univ Marques de Valdecilla, Dept Gen & Digest Surg, Colorectal Unit, Santander 39008, Spain, [Martin-Cardona, Albert] Hosp Univ Mutua Terrassa, Ctr Invest Biomed Red Enfermedades Hepat & Digest, Gastroenterol Dept, Terrassa 08221, Spain, [Zabana, Yamile] Hosp Univ Mutua Terrassa, Ctr Invest Biomed Red Enfermedades Hepat & Digest, Gastroenterol Dept, Terrassa 08221, Spain, [El Hajra, Ismael] Hosp Univ Puerta de Hierro, Gastroenterol Dept, Majadahonda 28220, Spain, [Gonzalez-Partida, Irene] Hosp Univ Puerta de Hierro, Gastroenterol Dept, Majadahonda 28220, Spain, [Hernandez-Aretxabaleta, Nerea] Hosp Univ Basurto, Gastroenterol Dept, Bilbao 48013, Spain, [De la Maza, Saioa] Hosp Univ Basurto, Gastroenterol Dept, Bilbao 48013, Spain, [Perez-Martinez, Isabel] Hosp Univ Cent Asturias, Inst Invest Sanitaria Principado Asturias ISPA 33, Dept Gastroenterol, Oviedo 33011, Spain, [Castano, Andres] Hosp Univ Cent Asturias, Inst Invest Sanitaria Principado Asturias ISPA 33, Dept Gastroenterol, Oviedo 33011, Spain, [Fuentes-Valenzuela, Esteban] Hosp Univ Rio Hortega, Gastroenterol Dept, Valladolid 47012, Spain, [Najera-Munoz, Rodrigo] Hosp Univ Rio Hortega, Gastroenterol Dept, Valladolid 47012, Spain, [Jimenez, Nuria] Hosp Gen Univ Elche, Gastroenterol Dept, Alicante 03203, Spain, [Rubin de Celix, Cristina] Univ Autonoma Madrid UAM, Gastroenterol Dept, Hosp Univ La Princesa, Inst Invest Sanitaria Princesa IIS IP,Ctr Invest, Madrid 28006, Spain, [Castro, Micaela Riat] Univ Autonoma Madrid UAM, Gastroenterol Dept, Hosp Univ La Princesa, Inst Invest Sanitaria Princesa IIS IP,Ctr Invest, Madrid 28006, Spain, [Chaparro, Maria] Univ Autonoma Madrid UAM, Gastroenterol Dept, Hosp Univ La Princesa, Inst Invest Sanitaria Princesa IIS IP,Ctr Invest, Madrid 28006, Spain, [Gisbert, Javier P.] Univ Autonoma Madrid UAM, Gastroenterol Dept, Hosp Univ La Princesa, Inst Invest Sanitaria Princesa IIS IP,Ctr Invest, Madrid 28006, Spain, [Gutierrez, Ana] Hosp Gen Alicante, Gastroenterol Dept, Ctr Invest Biomed Red Enfermedades Hepat & Digest, Inst Invest Sanitaria & Biomed Alicante ISABIAL, Alicante 03010, Spain, [Suarez Ferrer, Cristina] Hosp Univ La Paz, Gastroenterol Dept, Madrid 28046, Spain, [Luis Rueda, Jose] Hosp Univ La Paz, Gastroenterol Dept, Madrid 28046, Spain, [Maria Huguet, Jose] Hosp Gen Univ Valencia, Gastroenterol Dept, Valencia 46014, Spain, [Fernandez-Clotet, Agnes] Hosp Clin Barcelona, Gastroenterol Dept, Barcelona 08036, Spain, [Gonzalez-Vivo, Maria] Hosp del Mar, Gastroenterol Dept, Barcelona 08003, Spain, [Del Val, Blanca] Hosp Rafael Mendez, Gastroenterol Dept, Lorca 30817, Spain, [Castro-Poceiro, Jesus] Hosp St Joan Despi Moises Broggi, Gastroenterol Dept, Barcelona 08970, Spain, [Melcarne, Luigi] Hosp Univ Parc Tauli, Gastroenterol Dept, Sabadell, Ctr Invest Biomed Red Enfermedades Hepat & Digest, Barcelona 08208, Spain, [Duenas, Carmen] Hosp Univ Caceres, Gastroenterol Dept, Caceres 10003, Spain, [Izquierdo, Marta] Hosp Univ Cabuenes, Gastroenterol Dept, Gijon 33203, Spain, [Monfort, David] Consorcio Sanitario Terrasa, Gastroenterol Dept, Barcelona 08227, Spain, [Bouhmidi, Abdel] Hosp Santa Barbara, Gastroenterol Dept, Puertollano 13500, Spain, [Ramirez De la Piscina, Patricia] Hosp Univ Vitoria Gasteiz, Gastroenterol Dept, Vitoria 01002, Spain, [Romero, Eva] Hosp Clin Univ Valencia, Gastroenterol Dept, Valencia 46010, Spain, [Molina, Gema] Hosp Arquitecto Marcide, Gastroenterol Dept, Ferrol 15405, Spain, [Zorrilla, Jaime] Hosp Univ Gregorio Maranon, Dept Colorectal & Gastrointestinal Surg, Madrid 28009, Spain, [Sanchez-Guillen, Luis] Hosp Gen Univ Elche, Dept Colorectal & Gastrointestinal Surg, Alicante 03203, Spain, [Manuel Benitez, Jose] Hosp Reina Sofia, Gastroenterol Dept, IMIBIC, Cordoba 14004, Spain, [Delgado-Guillena, Pedro] Hosp Gen Granollers, Gastroenterol Dept, Granollers 08042, Spain, [Tardillo, Carlos] Hosp Nuestra Sanora de la Candelaria, Gastroenterol Dept, Tenerife 38010, Spain, [Pena, Elena] Hosp Royo Villanova, Gastroenterol Dept, Zaragoza 50007, Spain, [Frago-Larramona, Santiago] Complejo Hosp Soria, Gastroenterol Dept, Soria 42005, Spain, [Carmen Rodriguez-Grau, Maria] Hosp Univ Henares, Gastroenterol Dept, Coslada 28002, Spain, [Plaza, Rocio] Hosp Univ Infanta Leonor, Gastroenterol Dept, Madrid 28031, Spain, [Perez-Galindo, Pablo] Complejo Hosp Univ Pontevedra, Gastroenterol Dept, Pontevedra 36071, Spain, [Martinez-Cadilla, Jesus] Hosp Alvaro Cunqueiro Vigo, Gastroenterol Dept, Vigo 36312, Spain, and Spanish Working Group in Crohn's Disease and Ulcerative Colitis (GETECCU)

Subjects
Gastroenterología y hepatología, Crohn’s disease, vedolizumab, medicine.medical_specialty, Crohns-disease, Cirurgia - Complicacions, Surgical complications, Productes biològics, Digestive System Diseases::Gastrointestinal Diseases::Gastroenteritis::Inflammatory Bowel Diseases::Crohn Disease [DISEASES], Outcomes, Pathological Conditions, Signs and Symptoms::Pathologic Processes::Postoperative Complications [DISEASES], Crohn, Malaltia de, Lower risk, Inflammatory bowel disease, Article, ustekinumab, Vedolizumab, surgery, inflammatory bowel disease, Internal medicine, Ustekinumab, postoperative complications, Medicine, Risk factor, ulcerative colitis, Crohn's disease, preoperative therapy, business.industry, Postoperative infectious complications, Retrospective cohort study, General Medicine, anti-TNF, Metaanalysis, medicine.disease, Resection, mezclas complejas::productos biológicos [COMPUESTOS QUÍMICOS Y DROGAS], Ulcerative colitis, afecciones patológicas, signos y síntomas::procesos patológicos::complicaciones posoperatorias [ENFERMEDADES], Gastrointestinal surgery, enfermedades del sistema digestivo::enfermedades gastrointestinales::gastroenteritis::enfermedad inflamatoria intestinal::enfermedad de Crohn [ENFERMEDADES], Risk-factors, Ulcerative-colitis, Preoperative steroid use, Complex Mixtures::Biological Products [CHEMICALS AND DRUGS], business, medicine.drug
Abstract

Background: The impact of biologics on the risk of postoperative complications (PC) in inflammatory bowel disease (IBD) is still an ongoing debate. This lack of evidence is more relevant for ustekinumab and vedolizumab. Aims: To evaluate the impact of biologics on the risk of PC. Methods: A retrospective study was performed in 37 centres. Patients treated with biologics within 12 weeks before surgery were considered “exposed”. The impact of the exposure on the risk of 30-day PC and the risk of infections was assessed by logistic regression and propensity score-matched analysis. Results: A total of 1535 surgeries were performed on 1370 patients. Of them, 711 surgeries were conducted in the exposed cohort (584 anti-TNF, 58 vedolizumab and 69 ustekinumab). In the multivariate analysis, male gender (OR: 1.5, 95% CI: 1.2–2.0), urgent surgery (OR: 1.6, 95% CI: 1.2–2.2), laparotomy approach (OR: 1.5, 95% CI: 1.1–1.9) and severe anaemia (OR: 1.8, 95% CI: 1.3–2.6) had higher risk of PC, while academic hospitals had significantly lower risk. Exposure to biologics (either anti-TNF, vedolizumab or ustekinumab) did not increase the risk of PC (OR: 1.2, 95% CI: 0.97–1.58), although it could be a risk factor for postoperative infections (OR 1.5, 95% CI: 1.03–2.27). Conclusions: Preoperative administration of biologics does not seem to be a risk factor for overall PC, although it may be so for postoperative infections.

Published
2021

Catalog

Books, media, physical & digital resources
See catalog results