Abstract Objective: To evaluate if the comorbidity and coinfections presented by SARS-CoV-2 infection vs. COVID-19 impact our Mexican children. Method: Prospective and observational study that included the 2020-2021 peak influenza season. All patients with a diagnosis of infection by SARS-CoV-2 vs. COVID-19 who were admitted to the Hospital Infantil de Mexico were analyzed. Real-time RT-PCR for SARS-CoV-2 was performed in all patients, determining E, RdRp and RP genes and protein N, as well as RT-PCR for detection of respiratory viruses. Results: The inclusion criteria were met by 163 patients. The group with the highest risk of becoming ill was adolescents (40.4%), followed by schoolchildren and preschoolers (21.4% and 19.6% of the cases, respectively). There were three cases with viral coinfection: two (1.2%) with parvovirus B-19 and one (0.6%) with herpes type I; another two (1.2%) showed bacterial coinfection. The main comorbidity were obesity, acute lymphoblastic leukemia and arterial hypertension. Regarding mortality, we only had four cases (2.4%). Conclusions: Obesity, cancer, hypertension, heart disease and diabetes are comorbidity present in our patients, as referred to in literature, but not coinfections. In our study, we did not have any associated mortality related to comorbidity.

Resumen Objetivo: Evaluar el impacto de la comorbilidad y de las coinfecciones presentadas por la infección por SARS-CoV-2 vs. COVID-19 en niños mexicanos. Método: Estudio prospectivo y observacional que comprendió la temporada alta de influenza 2020-2021, analizando todos los pacientes con diagnóstico de infección vs. enfermedad por SARS-CoV-2 vs. COVID-19 que ingresaron al Hospital Infantil de México. Se realizó en todos RT-PCR en tiempo real para SARS-CoV-2, determinando gen E, gen RdRp, gen RP y proteína N, y RT-PCR multiplex para detección de virus respiratorios. Resultados: Los criterios de inclusión los cumplieron 163 pacientes. El grupo con mayor riesgo de enfermar fueron los adolescentes (40.4%), seguidos de los escolares y preescolares (21.4% y 19.6% de los casos, respectivamente). Hubo tres casos con coinfección viral: dos (1.2%) con parvovirus B-19 y uno (0.6%) con herpes tipo I; hubo otros dos (1.2%) con coinfección bacteriana. La principal comorbilidad correspondió a obesidad, leucemia linfoblástica aguda e hipertensión arterial. En cuanto a mortalidad, solo hubo cuatro casos (2.4%). Conclusiones: Obesidad, cáncer, hipertensión, cardiopatías y diabetes constituyen la comorbilidad en nuestros pacientes, como se refiere en la literatura, no así las coinfecciones. En nuestro estudio no hubo casos de mortalidad relacionada con la comorbilidad.

Abstract Periodontitis Stage III-IV, Grade C (PerioC) is a severe form of Periodontitis. The individual genetic background has been shown to be an important etiopathogenic factor for the development of this disease in young, systemically healthy, and non-smokers patients. Recently, after exome sequencing of families with a history of the disease, PerioC was associated with three single nucleotide variations (SNVs) – rs142548867 (EEFSEC), rs574301770 (ZNF136), and rs72821893 (KRT25) – which were classified as deleterious or possibly harmful by prediction algorithms. Objective Seeking to validate these findings in a cohort evaluation, this study aims to characterize the allele and genotypic frequency of the SNVs rs142548867, rs574301770, and rs72821893 in the Brazilian population with PerioC and who were periodontally healthy (PH). Methodology Thus, epithelial oral cells from 200 PerioC and 196 PH patients were harvested at three distinct centers at the Brazilian Southern region, their DNA were extracted, and the SNVs rs142548867, rs574301770, rs72821893 were genotyped using 5′-nuclease allelic discrimination assay. Differences in allele and genotype frequencies were analyzed using Fisher’s Exact Test. Only the SNV rs142548867 (C > T) was associated with PerioC. Results The CT genotype was detected more frequently in patients with PerioC when compared with PH subjects (6% and 0.5% respectively), being significantly associated with PerioC (odds ratio 11.76, p=0.02). Conclusion rs142548867 represents a potential risk for the occurrence of this disease in the Brazilian population. IIIIV, IIIIV III IV, IV III-IV (PerioC young nonsmokers non smokers Recently (SNVs rs rs14254886 EEFSEC, EEFSEC , (EEFSEC) rs57430177 ZNF136, ZNF136 ZNF (ZNF136) rs7282189 KRT25 KRT (KRT25 algorithms evaluation PH. . (PH) Thus 20 19 region extracted 5′nuclease 5nuclease nuclease 5′ 5 assay Fishers Fisher s Test T 6% 6 (6 05 0 0.5 respectively, respectively respectively) odds 1176 11 76 11.76 p=0.02. p002 p p=0.02 02 p=0.02) rs1425488 (EEFSEC rs5743017 ZNF13 (ZNF136 rs728218 KRT2 (KRT2 (PH 2 1 ( 0. 117 7 11.7 p00 p=0.0 rs142548 rs574301 ZNF1 (ZNF13 rs72821 (KRT 11. p0 p=0. rs14254 rs57430 (ZNF1 rs7282 p=0 rs1425 rs5743 (ZNF rs728 p= rs142 rs574 rs72 rs14 rs57 rs7 rs1 rs5

Abstract Phantoms play an important role in biomedicine due to their usefulness in the training of personnel and in the development of investigations. We propose a methodology to narrow down the selection of design parameters of phantoms for calibrating ultrasound devices. For doing so, we model the phantoms as composite materials. Through a mathematical homogenization technique, the global properties of the phantom are given in terms of the volume fractions of its components, their geometric shapes, and physical properties. We explore these parameters to determine ranges that yield the desirable values of acoustic impedance and attenuation. The procedure is illustrated for a class of sandwich-like phantoms made of layers of agar of different concentrations with complex elastic moduli. In this example, homogenization provides analytical formulae of the global properties that can be used to identify the layers’ thicknesses and concentrations that yield a low impedance and an average attenuation coefficient. These analytical results are compared with a numerical homogenization method, showing good agreement.

RESUMEN En esta investigación, se evaluó el efecto del cultivo iniciador láctico, el tiempo de fermentación, la temperatura de incubación y el porcentaje de grasa en la firmeza y consistencia de una bebida de leche fermentada, a través de las características fisicoquímicas de acidez total, pH, sinéresis y comportamiento de flujo. El propósito fue encontrar la mejor formulación que extienda la vida útil del yogur, lo que lleva a un perfeccionamiento del proceso de fabricación de una empresa local de productos lácteos en Barrancabermeja (Santander, Colombia). Se evaluaron criterios de calidad por medio del porcentaje de acidez y pH del yogurt, así como su sinéresis y parámetros reológicos, durante un tiempo de almacenamiento de 24 horas y de 7 días en refrigeración. Se obtuvieron parámetros de calidad aceptables para el yogurt, preparado con una concentración del inóculo de 2%, una temperatura de incubación de 40°C y un tiempo de incubación de 150 minutos. Además, se encontraron mejores propiedades de firmeza y de consistencia, con ausencia de sinéresis y viscosidad en el rango aceptado, para este producto lácteo.

ABSTRACT In this research, the effect of the lactic starter culture, the fermentation time, the incubation temperature and the percentage of fat on the firmness and consistency of a fermented milk drink was evaluated through physicochemical characteristics of total acidity, pH, syneresis and flow behavior. The purpose was to find the best formulation that extends the shelf life of yogurt, leading to an improvement in the manufacturing process of a local dairy company in Barrancabermeja (Santander, Colombia). Quality criteria were evaluated by means of the percentage of acidity and pH of the yogurt, as well as its syneresis and rheological parameters during a storage time of 24 hours and 7 days in refrigeration. Acceptable quality parameters were obtained for the yogurt prepared with an inoculum concentration of 2%, an incubation temperature of 40°C and an incubation time of 150 minutes. In addition, better properties of firmness and consistency were found, with absence of syneresis and viscosity in the accepted range, for this dairy product.

ABSTRACT Supplying healthy and cost-effective postlarvae is critical to the success of the shrimp industry. Given the cost of Artemia in larvae culture, there is considerable interest in using alternative live feeds such as copepods. This study's objective was to evaluate five diets with different proportions of Artemia and copepods offered to Penaeus vannamei larvae. Biological factors such as growth, survival to postlarvae, and final weights were evaluated in conjunction with economic factors. The diets offered were: 1) 100% Artemia 2) 75% Artemia and 25% copepods 3) 50% Artemia and 50% copepods 4) 25% Artemia and 75% copepods and 5) 100% copepods. Concerning the biological response, there were no significant differences observed between the five treatments. The economic evaluation was based on a partial budget. It was concluded that there were no significant differences in survival or yields. However, the data collected in this experiment concluded that the treatment with 100% Artemia had higher annual net benefits due to the combined effect of survival rates and cost. These net benefits can vary in other repetitions, so it is recommended to experiment more times to observe differences in profits among diets.

Abstract Two identical homemade prototypes are used to monitoring the tide levels on two strategic points of the Serinhaém estuary. This monitoring was realized along a period close to the new moon phase. From the analysis of the experimental results, the average height of the tide is determined between each period of high-tide and low-tide. These estimations show discrepancies minors than half order of magnitude, compared to the theoretical predictions of the static and dynamic oceanic tide models. Also, the amplification effects of the tide in the estuary head can be quantified exhibiting a maximum gain of 1.33, which is observed in the new moon phase.

Abstracts: Introduction: Highly trained athletes show structural cardiac changes as adaptation to overload. Rise in remodeling biomarkers and myocardial fibrosis after intense exercise in athletes has been evidenced; however, the behavior of these biomarkers according to pre-competition training level has not been evaluated. Objective: To evaluate fibrosis biomarkers levels and right ventricle function in marathon runners according to their previous training level, in the period prior to a marathon race and immediately after it. Methods: Thirty-six healthy male marathon runners were included. Subjects were grouped according to their previous training level: Group 1 (G1): ≥100 km/week and Group 2 (G2): <100 km/week. Transthoracic echocardiography along with plasmatic levels of galectin-3 and amino terminal propeptide of type III procollagen (PIIINP) were measured one week previous and immediately after the marathon. Results: Post-effort right ventricle systolic function decreased in G2, together with a significant elevation of PIIIPNP (61±16 to 94±24 ng/mL, p=0.01). These changes were not observed in G1 (from 65±11 to 90±29 ng/mL, p=0.10). Plasma galectin-3 increased significantly in both groups immediately post-exercise (6.8±2.2 to 19.7±4.9 ng/mL, p=0.012, and 6.0±1.1 to 19.4±5.9 ng/mL, p=0.01, in G1 and G2. respectively). Conclusion: Less trained athletes evidenced higher post marathon levels of PIIIPNP which is associated with a decreased global right ventricle function. Plasma galectin-3 levels increased significantly after intense exertion regardless of the intensity of previous training.

Resumen: Introducción: Atletas altamente entrenados muestran cambios cardíacos estructurales como adaptación a la sobrecarga, producto del ejercicio repetitivo y extenuante. Se han evidenciado elevación de biomarcadores de remodelado y fibrosis miocárdica posterior al ejercicio intenso en atletas. Sin embargo, el comportamiento de estos biomarcadores según el nivel de entrenamiento previo no se ha evaluado. Objetivo: Investigar biomarcadores de fibrosis y función ventricular derecha en maratonistas con distinto nivel de entrenamiento previo. Métodos: Se incluyeron 36 maratonistas hombres, sanos, que completaron 42 km en la maratón de Santiago. Se dividieron según entrenamiento previo en dos grupos, Grupo 1 (G1): ≥100 km/semana y Grupo 2 (G2): <100 km/semana. Se realizó ecocardiografía transtorácica y se evaluaron niveles plasmáticos de galectina-3 y del propéptido amino terminal del procolágeno tipo III (PIIINP) en la semana previa a la carrera e inmediatamente posterior a ésta. Resultados: Posterior a la maratón, la función sistólica del ventrículo derecho disminuyó en el grupo G2 junto con un aumento significativo de los niveles plasmáticos de PIIIPNP (61±16 a 94±24 ng/mL, p=0,01). Estos cambios no se observaron en el grupo G1 (65 ± 11 a 90±29 ng/mL, p=0,10). Los niveles plasmáticos de galectina-3 aumentaron significativamente en ambos grupos posterior al ejercicio (6,8±2,2 a 19,7±4,9 ng/mL, p 0,012 y 6,0±1,1 a 19,4 ± 5,9 ng/mL, p 0,01) en los grupos G1 y G2, respectivamente). Conclusiones: Atletas con menor grado de entrenamiento, presentan posterior a una maratón un significativo aumento de productos de degradación del colágeno (PIIIPNP) asociado a disminución de la función del ventrículo derecho. Los niveles de galectina-3 plasmática aumentan significativamente en ambos grupos post-esfuerzo independiente del entrenamiento previo.

ABSTRACT Introduction: The autonomic nervous system plays an important role in cardiovascular readjustments to exercise. In cardiovascular hyperreactivity there is a greater sensitivity of the sympathetic system to different stressors. Objective: To determine the characteristics of cardiac autonomic control in young adults with different degrees of cardiovascular reactivity under basal conditions and during isometric exercise. Method: The sample consisted of 97 individuals of both sexes, and was divided into three groups: normoreactive, hyperreactive and with hypertensive response, according to the pressor response to weight-bearing tests. The individuals underwent a complete study of heart rate variability at rest and during isometric test. The frequency domain for the variables was: low, high, low/high resting ratio, and the parameters of Poincaré plots at rest and during exercise (values of standard deviation 1 [SD1], 2 [SD2], and the reason between them). Results: Under basal conditions, hyperreactive individuals with a hypertensive response had a sympathetic predominance over cardiac function and lower heart rate variability. During the isometric exercise SD1 and SD2 axes values decreased in all groups and SD1/SD2 ratio decreased in normoreactive individuals with hypertensive response; but it was hardly modified in those hyper-reactive. Conclusions: Individuals with cardiovascular hyperreactivity have a prior autonomic imbalance under basal conditions and a reduction of autonomic vagal modulation during exercise that may favor the development of arterial hypertension.

RESUMEN Introducción: El sistema nervioso autónomo desempeña un papel importante en los reajustes cardiovasculares al ejercicio. En la hiperreactividad cardiovascular existe una mayor sensibilidad del sistema simpático ante diferentes estímulos estresantes. Objetivo: Determinar las características del control autonómico cardíaco en adultos jóvenes con diferentes grados de reactividad cardiovascular en condiciones basales y durante el ejercicio isométrico. Método: La muestra estuvo constituida por 97 individuos de ambos sexos, y se dividió en tres grupos: normorreactivos, hiperreactivos y con respuesta hipertensiva, de acuerdo a la respuesta presora a la prueba del peso sostenido. A todos los individuos se les realizó un estudio de variabilidad de la frecuencia cardíaca en reposo y durante la prueba isométrica. Se estudiaron las variables en el dominio de la frecuencia: baja, alta, relación baja/alta en reposo, y los parámetros del diagrama de Poincaré en reposo y durante el ejercicio (valores de desviación estándar 1 [SD1], 2 [SD2], y la razón entre ambos). Resultados: En estado basal los individuos hiperreactivos y con respuesta hipertensiva presentaron un predominio simpático sobre la función cardíaca y una menor variabilidad de la frecuencia cardíaca. Durante el ejercicio isométrico disminuyeron los valores de los ejes SD1 y SD2 en todos los grupos y la razón SD1/SD2 decreció en individuos normorreactivos y con respuesta hipertensiva; pero apenas se modificó en los hiperreactivos. Conclusiones: En los individuos con hiperreactividad cardiovascular ya está presente un desbalance autonómico en estado basal y existe una reducción de la modulación autonómica vagal durante el ejercicio, que puede favorecer el desarrollo de la hipertensión arterial.

Biomass as a renewable energy source can replace some of the world's energy demands that are currently satisfied by fossil fuels. Therefore, the study of physical and chemical properties is fundamental when evaluating its possible use as steam boiler fuel. Total silica content (% SiO2) in ashes represents the largest proportion of inert material that constitutes the biomass and could generate erosion corrosion problems and slag formation during the combustion process inside a steam generator. The sugar industry of Tucumán has a significant amount of biomass that could be used for energy purposes; for example, sugar cane crop residues (SCR). Therefore it is necessary to evaluate the content of% SiO2 in this material. The content of% SiO2 has been determined following the gravimetric method indicated in the ASTM E 887-88 standard. We worked with 33 SCR samples collected from different sugarcane fields in Tucumán. A content of% SiO2 was found in a range between 37.90% and 70.20%, with an average of 57.66% and a Coefficient of variation (CV%) of 15.41%. To measure the accuracy of the method used, the percentage recovery (% R) of% SiO2 was studied. It was found in a range between 80.76% to 99.91%, with an average value of 88.48% and a (CV%) of 6.64.

La biomasa como fuente de energía renovable puede sustituir algunas de las demandas de energías del mundo que actualmente satisfacen los combustibles fósiles. Por ello, el estudio de las propiedades físico químicas y energéticas de estas resulta fundamental a la hora de evaluar su posible utilización como combustible de calderas de vapor. El contenido de sílice total (%SiO2) en las cenizas de una biomasa representa la mayor proporción del material inerte que constituye la misma y que podría generar problemas de corrosión por erosión y formación de escorias durante el proceso de combustión en el interior del hogar de un generador de vapor. La industria azucarera de Tucumán cuenta con una importante cantidad de biomasa que podría utilizarse con fines energéticos; por ejemplo, los residuos de cosecha de la caña de azúcar (RAC). Por ello resulta necesario evaluar el contenido de %SiO2 en este material. Se ha determinado el contenido de %SiO2 siguiendo el método gravimétrico indicado en la norma ASTM E 887-88. Se trabajó con 33 muestras de RAC recolectadas de diferentes campos cañeros de Tucumán. Se encontró un contenido de %SiO2 en un rango entre 37,90% y 70,20%, con un promedio de 57,66% y un coeficiente de variación (CV%) de 15,41%. Para medir la exactitud del método empleado se estudió la recuperación porcentual (%R) de %SiO2, la misma se encontró en un rango entre 80,76% a 99,91%, con un valor promedio de 88,48% y un (CV%) de 6,64.

La gran mayoría de herramientas software que soportan la mejora de procesos de software (SPI) no interoperan entre ellas, es decir, el intercambio de información entre las diferentes herramientas es deficiente, lo que dificulta la secuencia y reutilización automática de la información de las iniciativas de SPI. En este artículo presentamos un modelo arquitectónico desde la vista de información para apoyar la interoperabilidad de las herramientas software que soportan las etapas de Diagnóstico de procesos y Formulación de mejoras. El modelo establece la arquitectura que describe el tipo de información que pueden intercambiar estas herramientas, así como la estructura de los datos, sus posibles valores, su semántica, y las restricciones impuestas sobre la utilización e interpretación de dicha información. El modelo arquitectónico está constituido por un conjunto de esquemas planteados de forma conceptual, el cual puede ser utilizado por organizaciones que deseen desarrollar herramientas software que interoperen entre sí, las cuales brinden soporte de manera integral al Diagnóstico y Formulación del ciclo de SPI. Estos esquemas fueron evaluados utilizando el método cualitativo Focus Group

Diverse software tools that support the software process improvement (SPI) not interoperate between them, that is to say, the exchange of information between the different tools is deficient, making it difficult to sequence and automatic re-use of information of SPI initiatives. In this article we present an architectural model from the information view to support the interoperability of software tools that support the stages of diagnosing the process and formulating improvements. The model establishes architecture that describes the type of information that can be exchanged these tools, as well as the structure of the data, their possible values, its semantics, and the restrictions imposed on the use and interpretation of such information. The architectural model is composed of a set of schemas, raised in conceptual form, which can be used by organizations that wish to develop software tools to interoperate, which provide support in a comprehensive way to diagnosing the process and formulating improvements of the SPI cycle. These schemas were evaluated using the qualitative method Focus Group

Abstract In2TiO5 is a good insulator at room temperature because it has a band gap of 3.2 eV. The thermoluminescent properties of europium activated In2TiO5 are reported in this work. This material was prepared by conventional solid state reaction, and its characterization was carried out by scanning electronic microscopy, energy dispersive spectroscopy and X-ray diffraction. The thermoluminescent intensity of the europium activated In2TiO5 increased nearly six times in comparison to In2TiO5 pure phosphor. The glow curve of In2TiO5: Eu was a broad band and it shows a maximum at 382 K. Five peaks centered at 372, 382, 432, 488 and 556 K were obtained by deconvolution method assuming the general order kinetics model. These peaks are in agreement with those obtained by the thermal bleaching named TM- TSTOP method. A linear dose-response was obtained between 31 to 1200 Gy followed by a saturation stage at 1400 Gy dose gamma radiation. The standard deviation of the thermoluminescent signal reproducibility was 5.7 %. The fading at room temperature was significantly influenced by the low temperature peak (382 K). Therefore, this material could be taken into account as a phosphor for high dose gamma dosimetry.

Resumen El titanato de indio, In2TiO5, es un buen aislante a temperatura ambiente debido a su ancho de banda prohibida que es de 3.2 eV. En este trabajo se reportan las propiedades termoluminiscentes de In2TiO5 activado con europio que fue sintetizado mediante reacción de estado sólido. El material fue caracterizado con microscopía electrónica de barrido, espectroscopia de dispersión de energía y por difracción de rayos X. La intensidad termoluminiscente del In2TiO5 activado con europio se incrementó cerca de seis veces respecto a la observada para In2TiO5 sin ion activador. La cuva de brillo de In2TiO5: Eu, es una banda ancha y con un máximo en 382 K. Se realizó análisis de deconvolución a las curvas de brillo asumiendo el modelo de cinética de orden general. Se determinaron cinco picos con máximos en 372, 382, 432, 488 y 556 K, los cuales coinciden con los datos experimentales obtenidos con el método de blanqueo térmico Tm-Tstop. La respuesta termoluminiscente respecto a la dosis gama fue lineal entre 31 y 1200 Gy, seguido de una región de saturación a partir de 1400 Gy. La reproducibilidad de la señal termoluminiscente fue 5.7 % en su desviación estándar. El desvanecimiento de la señal TL a temperatura ambiente, fue significativamente influenciado por el pico de baja temperatura (382 K). Los resultados obtenidos sugieren que In2TiO5: Eu podría ser considerado como un fósforo para dosimetría de alta radiación gamma.

Abstract: We present P 3D, an analysis pipeline based on the FIT3D fitting tool, developed to explore the properties of the stellar populations and ionized gas of integral field spectroscopy (IFS) data. P 3D was created to provide coherent, simple to distribute, and comparable dataproducts, independently of the origin of the data, focused on the data of the most recent IFU surveys (e.g., CALIFA, MaNGA, and SAMI), and the last generation IFS instruments (e.g., MUSE). In this article we describe the different steps involved in the analysis of the data, illustrating them by showing the dataproducts derived for NGC 2916, observed by CALIFA and P-MaNGA. As a practical example of the pipeline we present the complete set of dataproducts derived for the 200 datacubes that comprises the V500 setup of the CALIFA Data Release 2 (DR2), making them freely available through the network. Finally, we explore the hypothesis that the properties of the stellar populations and ionized gas of galaxies at the effective radius are representative of the overall average ones, finding that this is indeed the case.

Resumen: Presentamos P 3D, un dataducto de analisis basado en el paquete de ajustes FIT3D, desarrollado para explorar las propiedades de las poblaciones estelares y el gas ionizado en datos de espectroscopia de campo integral. P 3D se desarrollo para obtener productos derivados de una forma coherente, fácil de distribuir y de comparar independientemente del origen de los datos, enfocado al análisis de datos de muestreos recientes de espectroscopia 3D (e.g., CALIFA, MaNGA y SAMI), y la nueva generación de estos instrumentos (e.g., MUSE). A lo largo de este artículo describimos los diferentes pasos incluidos dentro del análisis de los datos, ilustrándolos mediante los productos derivados para NGC 2916, observada por CALIFA y P-MaNGA. Como un ejemplo practico del uso de este dataducto se presentan los datos completos obtenidos para 200 cubos que conforman la segunda distribución de datos CALIFA para la configuración de V500, distribuyéndolos de forma libre a través de la red. Finalmente, exploramos la hipótesis según la cual las propiedades de las poblaciones estelares y el gas ionizado en las galaxias al radio efectivo son representativas del promedio a lo largo de toda la galaxia, encontrando que, de hecho, éste es el caso.

Abstract: We present an improved version of FIT3D, a fitting tool for the analysis of the spectroscopic properties of the stellar populations and the ionized gas derived from moderate resolution spectra of galaxies. This tool was developed to analyze integral field spectroscopy data and it is the basis of P 3D, a pipeline used in the analysis of CALIFA, MaNGA, and SAMI data. We describe the philosophy and each step of the fitting procedure. We present an extensive set of simulations in order to estimate the precision and accuracy of the derived parameters for the stellar populations and the ionized gas. We report on the results of those simulations. Finally, we compare the results of the analysis using FIT3D with those provided by other widely used packages, and we find that the parameters derived by FIT3D are fully compatible with those derived using these other tools.

Resumen: Presentamos una versión mejorada de FIT3D, una herramienta de ajuste para el análisis de las poblaciones estelares y el gas ionizado en espectros de galaxias de resolución intermedia. La misma se desarrolló para el análisis de datos de espectroscopía de campo integral y es la base de P 3D, un dataducto usado en el análisis de datos de los muestreos CALIFA, MaNGA y SAMI. Describimos la filosofía y los pasos seguidos en el ajuste, presentando un conjunto amplio de simulaciones con el fin de estimar la precisión de los parámetros derivados, mostrando el resultado de dichas simulaciones. Finalmente, comparamos el resultado del análisis con FIT3D y el obtenido mediante otros paquetes de uso frecuente, encontrando que los parámetros derivados son totalmente compatibles.