Curvas de caudal y energía de una bomba de aire comprimido para extracción de agua

El presente trabajo tiene por objetivo la determinación de los parámetros de funcionamiento y curvas características, a partir de ensayos realizados a la Bomba de Aire Comprimido. El mismo, consiste en probar una nueva bomba con cilindro de bronce, a 15 metros de profundidad. La metodología aplicada consistió en ensayos de extracción de agua en una perforación real, donde intervienen, aparte de los elementos principales, los accesorios necesarios para las mediciones y control de las distintas pruebas realizadas a una misma profundidad (15m), variando presión de trabajo y tiempo de carga y descarga del cilindro. De esta manera se obtuvieron las curvas del caudal y la energía consumida por litro de agua extraída a 15 metros de profundidad, variables necesarias para el diseño y cálculo de la fuente de energía alternativa, solar y eólica, necesaria para la producción de aire comprimido.The objective of this work is to determinate the parameters of operation and characteristic curves of the Compressed air Pump from tests made to it. The work consists of testing a new pump with bronze cylinder at a depth of 15 meters. The applied methodology consisted in tests of water extraction in a real perforation; where aside from the main elements, take part the necessary accessories for the measurements and control of the different tests, made at a same depth (15m); varying the air pressure and the load and unload time of the cylinder. The obtained results are the volume and the consumed energy by liter of extracted water for a depth of 15 meters, necessary parameters for the design of the alternative energy source, solar and wind, for the production of compressed air.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Curvas de caudal y energía de una bomba de aire comprimido para extracción de agua

El presente trabajo tiene por objetivo la determinación de los parámetros de funcionamiento y curvas características, a partir de ensayos realizados a la Bomba de Aire Comprimido. El mismo, consiste en probar una nueva bomba con cilindro de bronce, a 15 metros de profundidad. La metodología aplicada consistió en ensayos de extracción de agua en una perforación real, donde intervienen, aparte de los elementos principales, los accesorios necesarios para las mediciones y control de las distintas pruebas realizadas a una misma profundidad (15m), variando presión de trabajo y tiempo de carga y descarga del cilindro. De esta manera se obtuvieron las curvas del caudal y la energía consumida por litro de agua extraída a 15 metros de profundidad, variables necesarias para el diseño y cálculo de la fuente de energía alternativa, solar y eólica, necesaria para la producción de aire comprimido.The objective of this work is to determinate the parameters of operation and characteristic curves of the Compressed air Pump from tests made to it. The work consists of testing a new pump with bronze cylinder at a depth of 15 meters. The applied methodology consisted in tests of water extraction in a real perforation; where aside from the main elements, take part the necessary accessories for the measurements and control of the different tests, made at a same depth (15m); varying the air pressure and the load and unload time of the cylinder. The obtained results are the volume and the consumed energy by liter of extracted water for a depth of 15 meters, necessary parameters for the design of the alternative energy source, solar and wind, for the production of compressed air.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Curvas de caudal y energía de una bomba de aire comprimido para extracción de agua

El presente trabajo tiene por objetivo la determinación de los parámetros de funcionamiento y curvas características, a partir de ensayos realizados a la Bomba de Aire Comprimido. El mismo, consiste en probar una nueva bomba con cilindro de bronce, a 15 metros de profundidad. La metodología aplicada consistió en ensayos de extracción de agua en una perforación real, donde intervienen, aparte de los elementos principales, los accesorios necesarios para las mediciones y control de las distintas pruebas realizadas a una misma profundidad (15m), variando presión de trabajo y tiempo de carga y descarga del cilindro. De esta manera se obtuvieron las curvas del caudal y la energía consumida por litro de agua extraída a 15 metros de profundidad, variables necesarias para el diseño y cálculo de la fuente de energía alternativa, solar y eólica, necesaria para la producción de aire comprimido.The objective of this work is to determinate the parameters of operation and characteristic curves of the Compressed air Pump from tests made to it. The work consists of testing a new pump with bronze cylinder at a depth of 15 meters. The applied methodology consisted in tests of water extraction in a real perforation; where aside from the main elements, take part the necessary accessories for the measurements and control of the different tests, made at a same depth (15m); varying the air pressure and the load and unload time of the cylinder. The obtained results are the volume and the consumed energy by liter of extracted water for a depth of 15 meters, necessary parameters for the design of the alternative energy source, solar and wind, for the production of compressed air.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

The Full Event Interpretation -- An exclusive tagging algorithm for the Belle II experiment

The Full Event Interpretation is presented: a new exclusive tagging algorithm used by the high-energy physics experiment Belle II. The experimental setup of Belle II allows the precise measurement of otherwise inaccessible $B$ meson decay-modes. The Full Event Interpretation algorithm enables many of these measurements. The algorithm relies on machine learning to automatically identify plausible $B$ meson decay chains based on the data recorded by the detector. Compared to similar algorithms employed by previous experiments, the Full Event Interpretation provides a greater efficiency, yielding a larger effective sample size usable in the measurement.Comment: 11 pages, 7 figures, 1 tabl

Indirect Immunofluorescence Assay for the Simultaneous Detection of Antibodies against Clinically Important Old and New World Hantaviruses

Peer reviewe

Infective Endocarditis in Patients on Chronic Hemodialysis

International audienceInfective endocarditis (IE) is a common and serious complication in patients receiving chronic hemodialysis (HD)

Influence of the timing of cardiac surgery on the outcome of patients with infective endocarditis and stroke.

BACKGROUND: The timing of cardiac surgery after stroke in infective endocarditis (IE) remains controversial. We examined the relationship between the timing of surgery after stroke and the incidence of in-hospital and 1-year mortalities. METHODS: Data were obtained from the International Collaboration on Endocarditis-Prospective Cohort Study of 4794 patients with definite IE who were admitted to 64 centers from June 2000 through December 2006. Multivariate logistic regression and Cox regression analyses were performed to estimate the impact of early surgery on hospital and 1-year mortality after adjustments for other significant covariates. RESULTS: Of the 857 patients with IE complicated by ischemic stroke syndromes, 198 who underwent valve replacement surgery poststroke were available for analysis. Overall, 58 (29.3%) patients underwent early surgical treatment vs 140 (70.7%) patients who underwent late surgical treatment. After adjustment for other risk factors, early surgery was not significantly associated with increased in-hospital mortality rates (odds ratio, 2.308; 95% confidence interval [CI], .942-5.652). Overall, probability of death after 1-year follow-up did not differ between 2 treatment groups (27.1% in early surgery and 19.2% in late surgery group, P = .328; adjusted hazard ratio, 1.138; 95% CI, .802-1.650). CONCLUSIONS: There is no apparent survival benefit in delaying surgery when indicated in IE patients after ischemic stroke. Further observational analyses that include detailed pre- and postoperative clinical neurologic findings and advanced imaging data (eg, ischemic stroke size), may allow for more refined recommendations on the optimal timing of valvular surgery in patients with IE and recent stroke syndromes

Impact of early valve surgery on outcome of staphylococcus aureus prosthetic valve infective endocarditis: Analysis in the international collaboration of endocarditis-prospective cohort study

Background. The impact of early valve surgery (EVS) on the outcome of Staphylococcus aureus (SA) prosthetic valve infective endocarditis (PVIE) is unresolved. The objective of this study was to evaluate the association between EVS, performed within the first 60 days of hospitalization, and outcome of SA PVIE within the International Collaboration on Endocarditis-Prospective Cohort Study. Methods. Participants were enrolled between June 2000 and December 2006. Cox proportional hazards modeling that included surgery as a time-dependent covariate and propensity adjustment for likelihood to receive cardiac surgery was used to evaluate the impact of EVS and 1-year all-cause mortality on patients with definite left-sided S. aureus PVIE and no history of injection drug use. Results. EVS was performed in 74 of the 168 (44.3%) patients. One-year mortality was significantly higher among patients with S. aureus PVIE than in patients with non-S. aureus PVIE (48.2% vs 32.9%; P = .003). Staphylococcus aureus PVIE patients who underwent EVS had a significantly lower 1-year mortality rate (33.8% vs 59.1%; P = .001). In multivariate, propensity-adjusted models, EVS was not associated with 1-year mortality (risk ratio, 0.67 [95% confidence interval, .39-1.15]; P = .15). Conclusions. In this prospective, multinational cohort of patients with S. aureus PVIE, EVS was not associated with reduced 1-year mortality. The decision to pursue EVS should be individualized for each patient, based upon infection-specific characteristics rather than solely upon the microbiology of the infection causing PVIE