Search results for "ESA"
showing 10 items of 11914 documents
In-situ radiotracer studies of sorption processes in solutions containing (bi)sulfite ions—II. Low carbon steel
1997
Abstract In this paper, time, potential and pH dependence of SO42− and HSO3− accumulations measured by an in-situ radiotracer method on surface oxide layers of low carbon steel are presented and discussed. This work is a continuation of a research program[1–5] and deals with the characterization of the sorption behaviour of low carbon steel in solutions containing sulfate and bisulfite ions (as a possible model of acid rain). From the experimental results it can be stated that 1. (i) the presence of bisulfite ions in the solution phase accelerates the corrosion of low carbon steel; 2. (ii) at E > 0.40 V the electrooxidation of HSO3− ions presumably proceeds to yield a steel surface covered …
Modelling the transport of carbonic acid anions through anion-exchange membranes
2003
Electrodiffusion of carbonate and bicarbonate anions through anion-exchange membranes (AEM) is described on the basis of the Nernst � /Planck equations taking into account coupled hydrolysis reactions in the external diffusion boundary layers (DBLs) and internal pore solution. The model supposes local electroneutrality as well as chemical and thermodynamic equilibrium. The transport is considered in three layers being an anion exchange membrane and two adjoining diffusion layers. A mechanism of
The automated assesment of artery hemodynamic parameters from ultrasound video
2012
The custom designed video processing software for analysis of B-mode and Doppler-mode ultrasound video has been proposed in this work. The software allows adjusting user-defined thresholds and tolerance levels to enhance contour detection in noisy and artifacted ultrasound images. The developed software is able to evaluate 16 hemodynamic parameters (artery diameter, pulse rate and flow velocity related parameters) in each cardiac cycle. The measurements were performed intermittently recording artery diameter (B-mode) and flow velocity (Doppler-mode). Software has validated in femoral artery measurements. The hemodynamic parameters computed by software were consistent with those obtained by …
Comparison between doppler-echocardiography and uncalibrated pulse contour method for cardiac output measurement. a multicenter observational study
2016
Objectives: Echocardiography and pulse contour methods allow, respectively, noninvasive and less invasive cardiac output estimation. The aim of the present study was to compare Doppler echocardiography with the pulse contour method MostCare for cardiac output estimation in a large and nonselected critically ill population. Design: A prospective multicenter observational comparison study. Setting: The study was conducted in 15 European medicosurgical ICUs. Patients: We assessed cardiac output in 400 patients in whom an echocardiographic evaluation was performed as a routine need or for cardiocirculatory assessment. Interventions: None. Measurements and Main Results: One echocardiographic car…
Efectos de un programa de rehabilitación cardíaca fase III sobre los factores de riesgo hipertensión arterial y obesidad en personas mayores de 60 a¿…
2011
[EN] Aim To quantify time of evolution of arterial hypertension (AHT) and obesity during Phase III of the Cardiac Rehabilitation Program (CRhbP) and to assess the possible influence of the patient's characteristics on the effectiveness of the program. Study design An observational retrospective study. Patients and methods A Phase III CRhbP was applied for one year on 18 patients over 60 years of age with cardiovascular disease (CVD). Both systolic (SBP) as well as diastolic (DBP) blood pressure (BP) and abdominal circumference (AC) were measured at the start of the program, at 6 months and at 12 months. Results The decrease in BP was significant for both SBP (p-value = 0.00) and DBP (p-valu…
Il generale dalla Chiesa, il terrorismo, la mafia
2022
Il 3 settembre 1982 a Palermo veniva ucciso dalla mafia il generale Carlo Alberto dalla Chiesa. Nella storia dell’Italia repubblicana, dalla Chiesa era l’uomo per gli incarichi difficili, fin da quando aveva scelto di andare volontario nella Sicilia di Salvatore Giuliano. Successivamente le istituzioni democratiche si affidarono a lui in alcuni dei momenti più drammatici, chiamandolo a contrastare l’offensiva del terrorismo brigatista, sia prima che dopo il sequestro e l’assassinio di Aldo Moro. La sua ultima missione, conclusasi con l’attentato che lo colpì assieme alla moglie, fu quella di prefetto di Palermo, dove era stato inviato a fronteggiare un’escalation di violenza della mafia sen…
Dalla mafia al terrorismo e viceversa: il metodo dalla Chiesa
2017
In this paper it is assumed that the connection between the repression the mafia and terrorism are inseparable: without the fight against terrorism there would not have been the mafia; in the legal field, as well as that of investigative, penitentiary, political institutions and administrative. The connection between these two different criminal experiences, that have so bloody pages in the history of Italy Republican, is represented by the figure and the action of Carlo Alberto dalla Chiesa and from his "method" of work
Teresa y Luis, Luis y Teresa. Dos santos en tiempos recios
2016
Resumen: El presente articulo analiza la relacion entre dos grandes santos espanoles de la Contrarreforma Catolica, Teresa de Jesus y el dominico fray Luis Bertran Palabras clave: Teresa de Jesus, Luis Bertran, Santos, Contrarreforma, Carmelitas Descalzos, Dominicos, Siglo XVI Abstract: The present article analyses the relation between two big Spanish saints of the Catholic Counter-reformation, Teresa de Jesus and the Dominican monk Luis Bertran Keywords : Teresa de Jesus, Luis Bertran, Saints, Counter-reformation, Discalced Carmelite, Dominicans, 16th century
On the spectral moments of non-WSSUS mobile-to mobile double-Rayleigh fading channels
2017
This paper deals with the mathematical analysis of the spectral moments of non-wide-sensestationary uncorrelated-scattering (non-WSSUS) mobile-to-mobile (M2M) double-Rayleigh fading channels. The point of departure is a recently proposed geometry-based statistical model (GBSM) for M2M double-Rayleigh fading channels from which general analytical expressions are derived for the average Doppler shift, Doppler spread, average delay, and delay spread. Closed-form solutions of such expressions are presented for the particular case of the geometrical two-rings scattering model. The obtained results indicate that the average Doppler shift and Doppler spread are directly influenced by not only the …
Volumetric changes of articular cartilage during stress relaxation in unconfined compression
2000
The time-dependent lateral expansion and load relaxation of cartilage cylinders subjected to unconfined compression were simultaneously recorded. These measurements were used to (1) test the assumption of incompressibility for articular cartilage, (2) measure the Poisson's ratio of articular cartilage in compression and (3) investigate the relationship between stress relaxation and volumetric change. Mechanical tests were performed on fetal, calf, and adult humeral head articular cartilage. The instantaneous Poisson's ratio of adult cartilage was 0.49+/-0.08 (mean+S.D.), thus confirming the assumption of incompressibility for this tissue. The instantaneous Poisson's ratio was significantly …