Optimization of connections for spatial modular structures

Congreso celebrado en la Escuela de Arquitectura de la Universidad de Sevilla desde el 24 hasta el 26 de junio de 2015.Every year Seville’s city Council orders the construction of a giant gateway for the celebration of the April Fair. These constructions, whose dimensions are approximately 50 meters length, 40 meters height and variable depth of 4 to 5 meters, are spatial modular structures composed of steel tubular elements connected by clamps and covered by wood boards. The consideration or not of the eccentricities introduced by the connection element as well as the determination of the stiffness to consider is one of the major problems when developing the analysis model. The construction company aims to achieve their optimization in order to reduce the final cost. This paper investigates about how different ways of modeling these connections affects the optimization of the final model. The extent to which the modification of the position of the eccentricities influences the optimization is also discussed, as this aspect is difficult to control on site

Analysis of the influence of the block in the dynamic properties of domestic buildings with masonry structure

Congreso celebrado en la Escuela de Arquitectura de la Universidad de Sevilla desde el 24 hasta el 26 de junio de 2015.The modal analysis of a building, performed by finite element method, is usually made in a building isolated model. In the case of traditional buildings with masonry structure, this simplification can be very unrealistic, particularly in the case of buildings with shared party walls. The influence of the adjacent buildings, in the modal results of domestic masonry buildings is discussed in this paper. The ultimate goal of the presented work is to quantify the influence of the block in modal results, compared with traditional calculation of isolated buildings. And we are very interested in seeing how the block affects the modal results of damaged buildings, for example, with a significant crack between bearing walls and shear walls due to an important settlement of the foundation. For this work, we have focused on the traditional Sevillan building with a masonry structure. We found that, in the case of buildings with flexible floor disconnected from shear walls and with cracks between bearing walls and shared walls, the dynamic response perpendicular to facade rise hugely. For this particular case, the block has little effect on the response in that direction

Biodegradation of choline NTF2 by Pantoea agglomerans in different osmolarity. Characterization and environmental implications of the produced exopolysaccharide

A specific microorganism, Pantoea agglomerans uam8, was isolated from the ionic liquid (IL) Choline NTF2 and identified by molecular biology. A biodegradation study was performed at osmolarity conditions (0.2, 0.6, 1.0 M). These had an important influence on the growth of the strain, exopolysaccharide (EPS) production, and biodegradation (1303 mg/L max production and 80% biodegradation at 0.6 M). These conditions also had an important influence on the morphology of the strain and its EPSs, but not in the chemical composition. The EPS (glucose, mannose and galactose (6:0.5:2)) produced at 0.6 M was further characterized using different techniques. The obtained EPSs presented important differences in the behavior of the emulsifying activity for vegetable oils (olive (86%), sunflower (56%) and coconut (90%)) and hydrocarbons (diesel (62%), hexane (60%)), and were compared with commercial emulsifiers. The EPS produced at 0.6 M had the highest emulsifying activity overall. This EPS did not show cytotoxicity against the tested cell line (<20%) and presented great advantages as an antioxidant (1,1-diphenyl-2-picryl-hydrazyl radical (DPPH) (85%), hydroxyl radical (OH) (99%), superoxide anion (O2−) (94%), chelator (54%), and antimicrobial product (15 mm). The osmolarity conditions directly affected the capacity of the strain to biodegrade IL and the subsequently produced EPS. Furthermore, the EPS produced at 0.6 M has potential for environmental applications, such as the removal of hazardous materials by emulsification, whilst resulting in positive health effects such as antioxidant activity and non-toxicityThis research was funded by the Spanish Ministry of Science and Innovation for financial support (project PID2022-136607NB-I00) and FUAM, Universidad Autónoma de Madrid, Spain (project number 820053

Potential applications of an exopolysaccharide produced by Bacillus xiamenensis RT6 isolated from an acidic environment

The Bacillus xiamenensis RT6 strain was isolated and identified by morphological, biochemical and molecular tests from an extreme acidic environment, Rio Tinto (Huelva). Optimisation tests for exopolysaccharide (EPS) production in different culture media determined that the best medium was a minimal medium with glucose as the only carbon source. The exopolymer (EPSt) produced by the strain was isolated and characterised using different techniques (GC-MS, HPLC/MSMS, ATR-FTIR, TGA, DSC). The molecular weight of EPSt was estimated. The results showed that the average molecular weight of EPSt was approximately 2.71 × 104 Da and was made up of a heteropolysaccharide composed of glucose (60%), mannose (20%) and galactose (20%). The EPSt showed antioxidant capabilities that significantly improved cell viability. Metal chelation determined that EPSt could reduce the concentration of transition metals such as iron at the highest concentrations tested. Finally, the emulsification study showed that EPSt was able to emulsify different natural polysaccharide oils, reaching up to an 80% efficiency (olive and sesame oil), and was a good candidate for the substitution of the most polluting emulsifiers. The EPSt was found to be suitable for pharmaceutical and industrial application

Production and characterisation of an exopolysaccharide by bacillus amyloliquefaciens: biotechnological applications

The Bacillus amyloliquefaciens RT7 strain was isolated from an extreme acidic environment and identified. The biodegradation capabilities of the strain using different carbon sources (glucose, oleic acid, Tween 80, PEG 200, and the combination of glucose–Tween 80) were evaluated via an indirect impedance technique. The glucose–Tween 80 combination was further studied using nuclear magnetic resonance (NMR). The exopolysaccharide (EPSRT7) that had been produced with the strain when biodegrading glucose–Tween 80 was isolated and characterised using different techniques (GC–MS, HPLC/MSMS, ATR–FTIR, TGA, and DSC), and its molecular weight was estimated. The results show that the average molecular weight of EPSRT7 was approximately 7.0794 × 104 Da and a heteropolysaccharide composed of mannose, glucose, galactose, and xylose (molar ratio, 1:0.5:0.1:0.1) with good thermostability. EPSRT7 showed good emulsifying activity against different natural oils and hydrocarbons at high concentrations (2 mg/mL) and at the studied pH range (3.1–7.2). It also presented good emulsifying activity compared to that of commercial emulsifiers. Lastly, EPSRT7 showed antioxidant capacity for different free radicals, a lack of cytotoxicity, and antioxidant activity at the cellular level. EPSRT7 has promising applications in bioremediation processes and other industrial applicationsThis research was funded by the Spanish Ministry of Science and Innovation for financial support (project PID2019-104812GB-I00) and FUAM, Universidad Autónoma de Madrid, Spain (project no. 820053

Relación entre rasgos y tipos de personalidad con la especialidad médica elegida por un grupo de médicos residentes

ResumenIntroducciónEl estudio de los rasgos y tipos de personalidad de los médicos se inició en los Estados Unidos en 1960 bajo la hipótesis de que la personalidad induce la elección del tipo de especialidad médica que se decide realizar. En Chile y España es donde más se ha estudiado esta relación. En México hay pocos estudios que han servido para comprender las formas en las que afrontan los problemas que se presentan durante su formación. Este es el primer estudio que se realiza con los médicos residentes de las diferentes especialidades que se imparten en el Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra con la hipótesis de que existe relación entre los tipos de personalidad con la especialidad elegida.ObjetivoDeterminas si los tipos de personalidad de los médicos residentes del Instituto Nacional de Rehabilitación difieren significativamente entre las distintas especialidades.MétodoSe realizó un estudio transversal aplicando el cuestionario factorial de la personalidad 16PF-5 a 50 médicos residentes de cinco de las siete especialidades que se cursan en el Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra. El cuestionario explora 16 rasgos primarios con los cuales se integran 5 dimensiones generales de personalidad. Los datos obtenidos se analizaron con SPSS 17. Para la comparación de dos proporciones se aplicó chi cuadrado, la forma de la distribución de las puntuaciones del cuestionario factorial de personalidad se corroboraron con el estadístico Kolmogorov Smirnov. Las comparaciones de medias por sexo se efectuaron con t de Student para muestras independientes o en su caso con U de Mann Whitney. Las comparaciones de medias por especialidad se hicieron con el análisis de varianza o con Kruskal- Wallis, los análisis multivariados se realizaron con el modelo de análisis discriminante y análisis de varianza de dos factores.ResultadosDe los 16 rasgos destacan: razonamiento, tensión y autosuficiencia; más bajas: afabilidad y vigilancia; de las 5 dimensiones sobresalieron independencia y ansiedad y más bajas extraversión y dureza. Por género se diferenciaron M vs. F: estabilidad 6.20±1.3 vs.5.17±1.5 (p=0.018) y atrevimiento 6.45±1.4 vs.4.70±1.4 (p=0.0001).ConclusionesExisten diferencias sobresalientes entre los rasgos y dimensiones de la personalidad.AbstractIntroductionThe study of personality trait and type of physicians began in the United States in 1960 under the hypothesis that personality prompts the type of specialty chosen to be pursued. Chile and Spain are the countries where this relationship has been studied most. In Mexico there are few studies that have served to further understand the ways in which physicians confront problems they face during their training. This is the first study done with physicians that are part of the different medical specialties imparted in the Luis Guillermo Ibarra Ibarra National Institute for Rehabilitation under the hypothesis that there is a relationship between the type of personality and the medical specialty chosen.ObjectiveTo determine if the National Institute for Rehabilitation resident physician's personality type differs significantly from other specialities.MethodA cross-sectional study was performed in which the 16PF-5 factorial personality questionnaire was completed by 50 resident physicians belonging to five of the seven specialities available in the Luis Guillermo Ibarra Ibarra National Institute for Rehabilitation. The questionnaire examines 16 primary personality traits that include 5 general personality dimensions. The data obtained was analysed using the SPSS 17 statistics program. For the comparison between two proportions, the chi squared test was used, and the distribution form of the factorial personality questionnaire scores was corroborated with the Kolmogorov-Smirnov test. The mean comparison by sex was performed using the Student t test for independent samples or with the Mann Whitney U test. The mean comparison for specialties was made using analysis of variance or with Kruskal-Wallis. The multivariate analysis was performed using a discriminant analysis model and the 2 factor analysis of variance.ResultsOf the 16 traits, reasoning, tension, and self-sufficiency stand out. The lowest were: affability and vigilance. Of the 5 dimensions, independence and anxiety stand out, while the lowest were extroversion and hardness. By gender, they were differentiated M vs. F: stability 6.20±1.3 vs. 5.17±1.5 (p=.018) and (0.655, p=.0001).ConclusionsThere are outstanding differences among the personality traits and personality dimensions

Rediseño de finca para contribuir con la fertilidad del suelo Ferralítico Amarillento Lixiviado

A redesign of an agricultural agroecosystem with an extension of 2.0 ha, in the property «Aldalina» of «Estelo Diaz» Credits and Services Cooperative, was undertaken to contribute in the improvement of soil fertility in Pinar del Rio province, Cuba, located in an altitude of 28 meters above sea level, 291, 290 North coordinates and 233, 210 to the East of the southern plain of the province. The economic, technical - productive, social dimensions were evaluated, so as the food security attributes (performance, economic risk, soil quality, crop health, land tenure and social networks) based on an agro-ecological methodology for the characterization and classification of the systems, on a scale of 1 to 4; (1 Very low; 2 under; 3 medium; and 4 high). An evaluation of food security of the production of the study area with an average value is done, showing high economic risk, low yields of crops, poor soil quality, low pH and organic matter, high involvement by pests, and weeds do not compete with crops in critical moments. The redesign consist on the use of cover crops from plots associations with a vertical and horizontal spatial distribution, to capture sunlight. The Soil is in a degradation process, management in this natural resource is inadequate and there is little diversity of plants in the agricultural ecosystem.Se realizó el rediseño de un agroecosistema agropecuario, de 2.0 ha de extensión, para contribuir al mejoramiento de la fertilidad del suelo, en la finca «Aldalina» de la Cooperativa de Créditos y Servicios «Estelo Díaz», provincia de Pinar del Río, Cuba. Ubicado a una altitud de 28 metros sobre el nivel del mar, en lascoordenadas Norte 291.290 y este233.210 de la llanura sur de la provincia. Se evaluaron las dimensiones: económica, técnico productiva, social y los atributos de seguridad alimentaria (rendimientos, riesgo económicos, calidad del suelo, salud del cultivo, tenencia de tierra y redes sociales), basado en una metodología agroecológica para la caracterización, tipificación de sistemas en una escala de 1 a 4; 1 muy bajo; 2 bajo; 3 medio; y 4 alto. Se evalúa la seguridad alimentaria de la producción en el área de estudio con un valor medio mostrando que posee alto riesgo económico, bajo rendimiento de los cultivos, baja calidad del suelo, valor de materia orgánica y de pH bajos, alta afectación por plagas y las arvenses no compite con los cultivos en los momentos críticos. El rediseño consiste en la utilización de cultivos de coberturas, a partir de asociaciones de parcelas, con una distribución espacial en sentido vertical y horizontal de los cultivos, para la captación de la luz solar. El suelo se encuentra en un proceso de degradación, el manejo de este recurso natural es inadecuado y existe poca diversidad de plantas en el agroecosistema