8 results on '"Albert, Tomas"'
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2. Earth as an exoplanet mission concept for a lunar orbiting cubesat
- Author
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Mikhail Sachkov, Leire Beitia-Antero, Ana I. Gómez de Castro, J. C. Vallejo, Carlos E. Miravet-Fuster, Albert Tomas, Ada Canet, Lorenzo Tarabini, and Shingo Kameda
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Solar System ,Mechanical Engineering ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astronomy and Astrophysics ,NASA Deep Space Network ,Lunar orbit ,01 natural sciences ,Exoplanet ,Physics::Geophysics ,Electronic, Optical and Magnetic Materials ,Astrobiology ,010309 optics ,Solar wind ,Space and Planetary Science ,Control and Systems Engineering ,Physics::Space Physics ,0103 physical sciences ,Earth (chemistry) ,CubeSat ,Astrophysics::Earth and Planetary Astrophysics ,010303 astronomy & astrophysics ,Instrumentation ,Geology ,Exosphere - Abstract
There is a growing interest in lunar exploration fed by the perception that the Moon can be made accessible to low-cost missions in the next decade. The ongoing projects to set a communications relay in lunar orbit and a deep space gateway, as well as the spreading of commercial-of-the shelf technology for small space platforms such as the cubesats contribute to this perception. Small, cubesat size satellites orbiting the Moon offer ample opportunities to study the Moon and enjoy an advantage point to monitor the Solar System and the large-scale interaction between the Earth and the solar wind. We describe the technical characteristics of a 12U cubesat to be set in polar lunar orbit for this purpose and the science behind it. The mission is named Earth as an exoplanet (EarthASAP) and is submitted to the Lunar Cubesats for Exploration call in 2016. EarthASAP is designed to monitor hydrated rock reservoirs in the lunar poles and to study the interaction between the large Earth’s exosphere and the solar wind in preparation for future exoplanetary missions.
- Published
- 2019
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3. Asistencia urgente a los pacientes con hemorragia digestiva alta en los hospitales comarcales catalanes
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Lluis Vidal, Josep Giné, Cristina Manso, Albert Tomas, Silvia Fàbregas, Agueda Abad, Virginia García, Francisco Vida Mombiela, Esteban Saperas, Joan Saló, Rafael Campo, Miriam Sàbat, Joaquim Rigau, Antonio J. Creix, José Carlos Laguna, Sandra Torra, Francisco José Martínez Cerezo, Ghassan Mreish Tatros, Miquel Torres, Jaume Boadas, Montserrat Planella, Jordi Rey, Fernando Baños, Domingo Pascual, and Josep Maria Castellví
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Hepatology ,business.industry ,Gastroenterology ,Medicine ,business ,Humanities - Abstract
Resumen Objetivo Valorar los recursos disponibles en los hospitales comarcales catalanes para la asistencia urgente de la hemorragia digestiva alta. Metodo Se analiza una encuesta enviada a 32 hospitales, sobre la existencia, composicion y recursos del turno de guardia (TDG) de endoscopia, referida al ano 2009. Resultados Respondieron 24 centros, que cubrian la asistencia de 3.954.000 habitantes. Tenian TDG 12 hospitales. No disponian de TDG en su centro de referencia 1.483.000 habitantes. Los centros con TDG tenian mas camas y cubrian mas poblacion. Los TDG estaban formados por 4,5 endoscopistas (rango 2-11), que cubrian 82,1 (33,2-182,5) guardias/ano. Diecisiete centros reportaban 1.571 episodios (51 por centro, rango 3-280, 39,68/100.000 hab.). Los centros con TDG reportaban mas casos (76 vs. 43, p = 0,047). Los que no disponen de TDG derivaron mas pacientes (147 vs . 17, p= 0,001). Los pacientes en urgencias estaban a cargo de medicina interna en 4 centros, de cirugia en 14 y repartidos entre ambos servicios en 6. Si ingresaban, quedaron a cargo de Digestivo solo en 6 hospitales. Los recursos mas utilizados eran la ligadura en la hemorragia varicosa y las terapias de inyeccion en la no varicosa. Un 21% de centros no realizaban tratamiento combinado. Conclusiones Una proporcion significativa de la poblacion no dispone de endoscopista de guardia en su centro de referencia. La constitucion de TDG en hospitales comarcales supone importantes cargas asistenciales. La coordinacion entre profesionales y centros permitiria la aplicacion eficiente de los recursos terapeuticos y el establecimiento de TDG en centros que no tienen.
- Published
- 2011
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4. Colonoscopic perforation: useful parameters for early diagnosis and conservative treatment
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Felip Pi, Javier De Castro, Albert Sueiras, Albert Tomas, Jesus Bollo, Josep Verge, Ferran Caballero, Jordi Castellví, Josep Vallet, and Conchita Iglesias
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Adult ,Male ,medicine.medical_specialty ,Time Factors ,Colonoscopic perforations ,Perforation (oil well) ,Peritonitis ,Colonoscopy ,Management colon perforations ,Risk Factors ,Internal medicine ,medicine ,Humans ,Iatrogenic perforations ,Aged ,Aged, 80 and over ,Wound Healing ,medicine.diagnostic_test ,business.industry ,Gastroenterology ,Endoscopy ,Middle Aged ,Hepatology ,medicine.disease ,Surgery ,Conservative treatment ,Intestinal Perforation ,Diffuse peritonitis ,Female ,General health ,Morbidity ,business - Abstract
Objective The purpose of this study is to determine useful parameters for the early diagnosis of colonoscopic perforation and to select those who would require surgical treatment. Methods We retrospectively reviewed the demographics, clinical and colonoscopic data, diagnostic-surgical interval, operative findings, complications, and hospital stay of patients who developed postcolonoscopy iatrogenic colonic perforation between January 2002 and December 2008. Results A retrospective multicentric study of patients diagnosed of colonoscopic perforation was performed. Fifty-four patients were found for final analysis (mean age, 71 years (2691 years). Thirty-four were diagnostic and 20 were therapeutic colonoscopies. Most patients in whom the perforation was noticed during colonoscopy were treated surgically (p=0.032) within 24 h (p=0.004) and had a lesser degree of surgical peritonitis (p=0.033). Those with deficient bowel preparation had more interventions (p
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- 2011
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5. [Emergency care of patients with upper gastrointestinal bleeding in regional hospitals in Catalonia]
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Francisco José Martínez, Cerezo, Ghassan Mreish, Tatros, Francisco Vida, Mombiela, Albert, Tomas, Agueda, Abad, Rafael, Campo, Joan, Saló, Jaume, Boadas, Fernando, Baños, Joaquim, Rigau, Miriam, Sabat, Silvia, Fàbregas, Lluis, Vidal, Montserrat, Planella, Josep Maria, Castellví, Josep, Giné, Esteban, Saperas, Sandra, Torra, Antonio J, Creix, Miquel, Torres, Jordi, Rey, Virginia, García, José Carlos, Laguna, Domingo, Pascual, and Cristina, Manso
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Spain ,Humans ,Emergency Service, Hospital ,Gastrointestinal Hemorrhage ,Hospitals ,Retrospective Studies - Abstract
To evaluate the resources available in Catalan regional hospitals for the emergency care of upper gastrointestinal hemorrhage.We analyzed a survey sent to 32 hospitals on the availability, composition and resources of a duty endoscopy service for the year 2009.Responses were obtained from 24 centers, covering 3,954,000 inhabitants. Duty endoscopists were available in 12 hospitals. A total of 1,483,000 inhabitants were unable to access a duty endoscopist in the referral center. Centers with duty endoscopists had more beds and had a larger catchment area. Duty services were composed of 4.5 endoscopists (range 2-11), covering 82.1 (33.2-182.5) duty shifts/year. Seventeen centers reported 1,571 episodes (51%, range: 3-280, 39.68/100,000 inhabitants). Centers with a duty service reported a greater number of cases (76 vs. 43, p=0.047). Centers without this service referred a greater number of patients (147 vs. 17, p=0.001). Patients in the emergency department were under the care of the internal medicine department in four centers, the surgery department in 14 centers and under the care of both departments in six. Admitted patients were under the care of the gastroenterology department in only six hospitals. The most widely used procedures were ligation of varicose bleeding and injection therapies in non-varicose bleeding. Twenty-one percent of centers did not perform combined treatment.A significant proportion of the population does not have access to a duty endoscopist in referral centers. Duty shifts represent significant workload in regional hospitals. Coordination among health professionals and centers would allow the efficient application of therapeutic resources and a duty endoscopy service to be established in centers lacking this resource.
- Published
- 2011
6. Su1130 Second-Line Rescue Therapy With Levofloxacin After Failure of Treatment to Eradicate Helicobacter pylori Infection: Time Trends in a Spanish Multicenter Study of 1,500 Patients
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Javier P. Gisbert, Angeles Perez Aisa, Fernando Bermejo, Manuel Castro-Fernandez, Pedro Almela, Jesus Barrio, Angel Cosme, Ines Modolell, Felipe Bory, Miguel Fernandez Bermejo, Luis Rodrigo, Juan A. Ortuno, Pilar Sanchez-Pobre, Sam Khorrami, Alejandro Franco, Albert Tomas, Iván Guerra, Eloisa Lamas, Julio Ponce, and Xavier Calvet
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Hepatology ,Gastroenterology - Published
- 2015
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7. Su1681 Second-Line Rescue Therapy With Levofloxacin After Failure of Treatment to Eradicate Helicobacter pylori Infection: Time Trends in a Spanish Multicenter Study of 1,000 Patients
- Author
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Javier P. Gisbert, Angeles Perez Aisa, Fernando Bermejo, Manuel Castro-Fernandez, Pedro Almela, Jesus Barrio, Angel Cosme, Ines Modolell, Felipe Bory, Miguel Fernandez Bermejo, Luis Rodrigo, Juan A. Ortuno, Pilar Sanchez-Pobre, Sam Khorrami, Alejandro Franco, Albert Tomas, Ivan Guerra, Eloisa Lamas, Julio Ponce, and Xavier Calvet
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Hepatology ,Gastroenterology - Published
- 2012
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8. Fast realistic modeling in bioelectromagnetism using lead-field interpolation.
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Yvert B, Crouzeix-Cheylus A, and Pernier J
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- Algorithms, Humans, Models, Biological, Electrocardiography methods, Electroencephalography methods, Magnetoencephalography methods, Radiation
- Abstract
The practical use of realistic models in bioelectromagnetism is limited by the time-consuming amount of numerical calculations. We propose a method leading to much higher speed than currently available, and compatible with any kind of numerical methods (boundary elements (BEM), finite elements, finite differences). Illustrated with the BEM for EEG and MEG, it applies to ECG and MCG as well. The principle is two-fold. First, a Lead-Field matrix is calculated (once for all) for a grid of dipoles covering the brain volume. Second, any forward solution is interpolated from the pre-calculated Lead-Fields corresponding to grid dipoles near the source. Extrapolation is used for shallow sources falling outside the grid. Three interpolation techniques were tested: trilinear, second-order Bézier (Bernstein polynomials), and 3D spline. The trilinear interpolation yielded the highest speed gain, with factors better than x10,000 for a 9,000-triangle BEM model. More accurate results could be obtained with the Bézier interpolation (speed gain approximately 1,000), which, combined with a 8-mm step grid, lead to intrinsic localization and orientation errors of only 0.2 mm and 0.2 degrees. Further improvements in MEG could be obtained by interpolating only the contribution of secondary currents. Cropping grids by removing shallow points lead to a much better estimation of the dipole orientation in EEG than when solving the forward problem classically, providing an efficient alternative to locally refined models. This method would show special usefulness when combining realistic models with stochastic inverse procedures (simulated annealing, genetic algorithms) requiring many forward calculations., (Copyright 2001 Wiley-Liss, Inc.)
- Published
- 2001
- Full Text
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