94 research outputs found
Preliminary Measurements of the Motion of Arcjet Current Channel Using Inductive Magnetic Probes
This paper covers the design and first measurements of non-perturbative, external inductive magnetic diagnostics for arcjet constrictors which can measure the motion of the arc current channel. These measurements of arc motion are motivated by previous simulations using the ARC Heater Simulator (ARCHeS), which predicted unsteady arc motion due to the magnetic kink instability. Measurements of the kink instability are relevant to characterizing motion of the enthalpy profile of the arcjet, the arcjet operational stability, and electrode damage due to associated arc detachment events. These first measurements indicate 4 mm oscillations at 0.5-2 kHz of the current profile
Adecuación de Normativa Vigente para la Contratación y Ejecución de Obras y Trabajos Públicos
Este proyecto tiene como propósito contar con un sistema de obras y trabajos públicos transparente y efectivo por el cual se garantice el correcto y adecuado uso de los recursos públicos destinados a la infraestructura universitaria.Fil: Izquierdo, Claudia María. Universidad Nacional de Córdoba. Secretaría de Planificación y Gestión Institucional. Subsecretaría de Planeamiento Físico; Argentina.Fil: Moré, Ricardo Rubén. Universidad Nacional de Córdoba. Secretaría de Planificación y Gestión Institucional. Subsecretaría de Planeamiento Físico; Argentina.Fil: Arias, Conrado. Universidad Nacional de Córdoba. Secretaría de Planificación y Gestión Institucional. Subsecretaría de Planeamiento Físico; Argentina.Fil: Cocco, María Fernanda. Universidad Nacional de Córdoba. Secretaría de Planificación y Gestión Institucional.Dirección General de Contrataciones. Argentina.Fil: López, Liliana. Universidad Nacional de Córdoba. Secretaría de Planificación y Gestión Institucional. Dirección General de Contrataciones. Argentina.Fil: Mazzoni, Emilio. Universidad Nacional de Córdoba. Secretaría de Planificación y Gestión Institucional. Dirección General de Contrataciones. Argentina.Fil: Boretto, Jhon. Universidad Nacional de Córdoba. Secretaría General; Argentina.Fil: Sigifredo, Eugenio. Universidad Nacional de Córdoba. Secretaría General. Dirección de Asuntos Jurídicos; Argentina.Fil: Obeide, Sergio F. Universidad Nacional de Córdoba. Secretaría de Planificación y Gestión Institucional; Argentina.Fil: Ponce, Isabel. Universidad Nacional de Córdoba. Secretaría de Planificación y Gestión Institucional. Subsecretaría de Planeamiento Físico; Argentina
FICARAM-15 Cruise Report 20th March – 22nd May 2013 on board BIO Hespérides by the Group FICARAM
54 páginas, 19 figuras, 3 anexosThe FICARAM-15 is the fifteenth repetition of a section conducted in 1994. This section is part
of the international program GOSHIP (http://www.go-ship.org/CruisePlans.html) to develop a
globally coordinated network of sustained hydrographic sections as part of the global
ocean/climate observing system.
The objective of the FICARAM-15 cruise is to investigate the temporal evolution of the
anthropogenic carbon and evaluate the CO2 absorption capacity of the South Atlantic region, the
Equatorial zone, and the subtropical region of Azores-Gibraltar in the North Atlantic. This cruise
is supported by the CATARINA project funded by the Ministry of Economy and
Competitiveness (CTM2010-17141) and is part of the European Union FP7 project
CARBOCHANGE (http://carbochange.b.uib.no/). The objective of FICARAM-15 cruise is
framed in the CATARINA project conducted by the tasks I.2.1 (air-sea CO2 exchange) I.3
(ventilation of water masses), I.4.1 (zonal variability of N2O and CH4), I.4.2 (anthropogenic
carbon storage), I.4.4 (saturation horizon of calcium carbonate along the section) and I.5.4
(evolution of the acidification rates).
Another component of the FICARAM-15 cruise aims to examine the biological and
biogeochemical mechanisms that hinder total dissolved organic carbon (DOC) remineralisation
in marine systems, taking a multidisciplinary perspective and applying many different
approaches. This is the global objective of the Spanish project DOREMI (CTM2012-34294) that
joins this FICARAM-15 cruise.During the FICARAM cruise the physical oceanography group was responsible for collecting the
following data sets: CTD and XBT data; vessel-mounted ADCP and lowered ADCP; continuous
thermosalinograph. Physical oceanographers participated in the cruise financed through Project
“Tipping Corners in the Meridional Overturning Circulation” (TIC-MOC), CTM2011-28867.
The FICARAM-15 cruise was organized in two phases with a common sampling.
LEG 1: From Punta Arenas (Chile) to Recife (Brazil): 62 stations.
Chief Scientist: Aida F. Ríos, PI of CATARINA project
LEG 2: From Recife (Brazil) to Cartagena (Spain): 46 stations
Chief Scientist: Celia Marrasé, PI of DOREMI project
This report contains the sampling of all the variables at each station along the FICARAM
section, as well as the analysis of the biogeochemical variables and the preliminary results. The
principal investigator of the DOREMI project produced another report with the common
sampling section, showing the analysis and results of the experiments on dissolved organic
matter carried out on board.This cruise
is supported by the CATARINA project funded by the Ministry of Economy and
Competitiveness (CTM2010-17141) and is part of the European Union FP7 project
CARBOCHANGE (http://carbochange.b.uib.no/)Peer reviewe
Riesgo quirúrgico tras resección pulmonar anatómica en cirugía torácica. Modelo predictivo a partir de una base de datos nacional multicéntrica
Introduction: the aim of this study was to develop a surgical risk prediction model in patients undergoing anatomic lung resections from the registry of the Spanish Video-Assisted Thoracic Surgery Group (GEVATS). Methods: data were collected from 3,533 patients undergoing anatomic lung resection for any diagnosis between December 20, 2016 and March 20, 2018. We defined a combined outcome variable: death or Clavien Dindo grade IV complication at 90 days after surgery. Univariate and multivariate analyses were performed by logistic regression. Internal validation of the model was performed using resampling techniques. Results: the incidence of the outcome variable was 4.29% (95% CI 3.6-4.9). The variables remaining in the final logistic model were: age, sex, previous lung cancer resection, dyspnea (mMRC), right pneumonectomy, and ppo DLCO. The performance parameters of the model adjusted by resampling were: C-statistic 0.712 (95% CI 0.648-0.750), Brier score 0.042 and bootstrap shrinkage 0.854. Conclusions: the risk prediction model obtained from the GEVATS database is a simple, valid, and reliable model that is a useful tool for establishing the risk of a patient undergoing anatomic lung resection
Herramienta para la mejora de la gestión de espacios de estudio en la Universidad de Salamanca
Memoria ID2022-087. Ayudas de la Universidad de Salamanca para la innovación docente, curso 2022-2023
Grupo español de cirugía torácica asistida por videoimagen: método, auditoría y resultados iniciales de una cohorte nacional prospectiva de pacientes tratados con resecciones anatómicas del pulmón
Introduction: our study sought to know the current implementation of video-assisted thoracoscopic surgery (VATS) for anatomical lung resections in Spain. We present our initial results and describe the auditing systems developed by the Spanish VATS Group (GEVATS). Methods: we conducted a prospective multicentre cohort study that included patients receiving anatomical lung resections between 12/20/2016 and 03/20/2018. The main quality controls consisted of determining the recruitment rate of each centre and the accuracy of the perioperative data collected based on six key variables. The implications of a low recruitment rate were analysed for '90-day mortality' and 'Grade IIIb-V complications'. Results: the series was composed of 3533 cases (1917 VATS; 54.3%) across 33 departments. The centres' median recruitment rate was 99% (25-75th:76-100%), with an overall recruitment rate of 83% and a data accuracy of 98%. We were unable to demonstrate a significant association between the recruitment rate and the risk of morbidity/mortality, but a trend was found in the unadjusted analysis for those centres with recruitment rates lower than 80% (centres with 95-100% rates as reference): grade IIIb-V OR=0.61 (p=0.081), 90-day mortality OR=0.46 (p=0.051). Conclusions: more than half of the anatomical lung resections in Spain are performed via VATS. According to our results, the centre's recruitment rate and its potential implications due to selection bias, should deserve further attention by the main voluntary multicentre studies of our speciality. The high representativeness as well as the reliability of the GEVATS data constitute a fundamental point of departure for this nationwide cohort
Real Wage Responsiveness to Unemployment in Spain: Asymmetries Along the Business Cycle
We estimate real wage cyclicality in the period compressed between 1987 and 2013 using a large administrative dataset of workers in Spain. Real wages are weakly procyclical in Spain and focusing on differences in different phases of the business cycle, we find that differences across expansions and recessions are significant, with an even lower real wage cyclicality in recessions. Furthermore, higher levels of unemployment do not translate into additional real wages adjustments when the economy is contracting, while lower levels of unemployment during expansions have incremental effects on wage elasticity. This general result holds after accounting for differences in tenure, type of contract and age categories. Nevertheless, wages of newly-hired workers are the most sensitive to the business cycle and exhibit the lowest asymmetric pattern between expansions and recessions. At the other end, wages of workers with more than six years of tenure can be characterized as the most protected against economic downturns. The same is true for fixed-term vs. permanent workers, as well as for young vs. older workers
The labor market effects of technology shocks
We analyze the effects of neutral and investment-specific technology shocks on hours worked and unemployment. We characterize the response of unemployment in terms of job separation and job finding rates. We find that job separation rates mainly account for the impact response of unemployment while job finding rates for movements along its adjustment path. Neutral shocks increase unemployment and explain a substantial portion of unemployment and output volatilityinvestment-specific shocks expand employment and hours worked and mostly contribute to hours worked volatility. We show that this evidence is consistent with the view that neutral technological progress prompts Schumpeterian creative destruction, while investment specific technological progress has standard neoclassical feature
Peri-operative red blood cell transfusion in neonates and infants: NEonate and Children audiT of Anaesthesia pRactice IN Europe: A prospective European multicentre observational study
BACKGROUND: Little is known about current clinical practice concerning peri-operative red blood cell transfusion in neonates and small infants. Guidelines suggest transfusions based on haemoglobin thresholds ranging from 8.5 to 12 g dl-1, distinguishing between children from birth to day 7 (week 1), from day 8 to day 14 (week 2) or from day 15 (≥week 3) onwards. OBJECTIVE: To observe peri-operative red blood cell transfusion practice according to guidelines in relation to patient outcome. DESIGN: A multicentre observational study. SETTING: The NEonate-Children sTudy of Anaesthesia pRactice IN Europe (NECTARINE) trial recruited patients up to 60 weeks' postmenstrual age undergoing anaesthesia for surgical or diagnostic procedures from 165 centres in 31 European countries between March 2016 and January 2017. PATIENTS: The data included 5609 patients undergoing 6542 procedures. Inclusion criteria was a peri-operative red blood cell transfusion. MAIN OUTCOME MEASURES: The primary endpoint was the haemoglobin level triggering a transfusion for neonates in week 1, week 2 and week 3. Secondary endpoints were transfusion volumes, 'delta haemoglobin' (preprocedure - transfusion-triggering) and 30-day and 90-day morbidity and mortality. RESULTS: Peri-operative red blood cell transfusions were recorded during 447 procedures (6.9%). The median haemoglobin levels triggering a transfusion were 9.6 [IQR 8.7 to 10.9] g dl-1 for neonates in week 1, 9.6 [7.7 to 10.4] g dl-1 in week 2 and 8.0 [7.3 to 9.0] g dl-1 in week 3. The median transfusion volume was 17.1 [11.1 to 26.4] ml kg-1 with a median delta haemoglobin of 1.8 [0.0 to 3.6] g dl-1. Thirty-day morbidity was 47.8% with an overall mortality of 11.3%. CONCLUSIONS: Results indicate lower transfusion-triggering haemoglobin thresholds in clinical practice than suggested by current guidelines. The high morbidity and mortality of this NECTARINE sub-cohort calls for investigative action and evidence-based guidelines addressing peri-operative red blood cell transfusions strategies. TRIAL REGISTRATION: ClinicalTrials.gov, identifier: NCT02350348
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