Modelling particle transport and deposition in the human healthy and stented tracheobronchial airways

The main goal of this study is the quantification of the particle transport and deposition within the human airways during light, normal and exercise breathing conditions using the computational fluid dynamics. In particular we presented a comparison between healthy and stented airways. The considered tracheobronchial model is based on the Weibel symmetric model in which we have inserted the Dumon prosthesis at different locations and on the CT- based geometries of a healthy and a stented airway. The results indicate an important redistribution of the particle deposition locations. Local overdoses can be found in the proximal regions of the prostheses, independently of the breathing conditions, of the particle size and of the considered geometry. The presented work is aimed to contribute to the understanding of the particle deposition in the human lung and to improve drug-aerosol therapies. For patients that underwent airways reconstructive surgery, it can give detailed information about the deposition efficiency and it may help targeting specific airways regions.The authors gratefully acknowledge the support of the Spanish Ministry of Industry and Competitiveness through the research Project DPI2017-83259-R (AEI/FEDER,UE)

A parametric tool for studying a new tracheobronchial silicone stent prototype: toward a customized 3d printable prosthesis

The management of complex airway disorders is challenging, as the airway stent placement usually results in several complications. Tissue reaction to the foreign body, poor mechanical properties and inadequate fit of the stent in the airway are some of the reported problems. For this reason, the design of customized biomedical devices to improve the accuracy of the clinical results has recently gained interest. The aim of the present study is to introduce a parametric tool for the design of a new tracheo-bronchial stent that could be capable of improving some of the performances of the commercial devices. The proposed methodology is based on the computer aided design software and on the finite element modeling. The computational results are validated by a parallel experimental work that includes the production of selected stent configurations using the 3D printing technology and their compressive test.The research is supported by the Spanish Ministry of Economy, Industry and Competitiveness through research project DPI2017-83259-R (AEI/FEDER,UE).The support of the Instituto de Salud Carlos III (ISCIII) through the CIBER-BBN initiative is gratefully acknowledged

Evaluación Económica y Financiera de los Canales de Distribución y Comercialización de Ayurveda Company S.A.S.

Trabajo de InvestigaciónAnálisis económico y financiero de la compañía Ayurveda Company S.A.S. en sus canales de distribución con recomendaciones.INTRODUCCIÓN 1. FUNDAMENTOS TEÓRICOS 2. DIAGNÓSTICO DE LA SITUACIÓN ACTUAL 3. PROPUESTA DE INVESTIGACIÓN BIBLIOGRAFÍA ANEXOSEspecializaciónEspecialista en Análisis y Administración Financier

Organic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure AA2024-CFPR

The effect of the galvanic corrosion process taking place between aluminium alloy (AA2024-T3) and carbon fiber reinforced plastic (CFRP) immersed in 0.05 M NaCl was studied using organic and inorganic compounds as corrosion inhibitors. Electrochemical approaches such as electrochemical noise analysis (ENA) and electrochemical impedance spectroscopy (EIS) were carried out to evaluate efficiencies of 1,2,4-triazole (C2H3N3) and cerium nitrate hexahydrate (Ce(NO3)3·6H2O) as corrosion inhibitors. The highest efficiency was reached for Ce(NO3)3.6H2O, with some improvement observed by adding C2H3N3 in a mixed inhibitor solution. The noise resistance (Rn) and polarization resistance (Rp) values calculated from ENA and EIS data showed almost identical behavior with different magni­tudes but similar trends. Adsorption isotherm models estimated with fractional surface coverage (q) parameter were fitted better to Langmuir model for C2H3N3 and Temkin model for Ce(NO3)3·6H2O. The calculated values of Gibbs free energy suggested physi­sorption and chemisorption as spontaneous interactions between a metal surface and both inhibitors. Energy-dispersive X-ray spectroscopy (EDS) was carried out before and after immersing AA2024-T3 in the electrolyte, identifying rich zones in copper with cerium deposited over it and confirming the presence of rare-earth oxide deposition and oxide film products. The EDS analysis for CFRP revealed the deposition of Ce and Al particles over its surface after immersion in the electrolyte, especially in the areas rich in carbon

Prácticas de lectura en estudiantes de educación media : La lectura interdisciplinar e intertextual como aproximación a la cultura académica universitaria

En esta tesis de grado, se describen las características que adquiere las prácticas de lectura (PL) de estudiantes de educación media, a partir de una propuesta didáctica interdisciplinar e intertextual, como aproximación a la cultura académica universitaria. Para ello, se abordaron tres aspectos considerados importantes. El primero, la cultura académica universitaria (CAU), desde su canon y pre requisitos relacionados con el desarrollo de las prácticas lectoras en los estudiantes al ingresar a ésta cultura, para lograr las comprensiones disciplinares en sus estudios. El segundo, la necesidad de abordar la lectura académica como práctica discursiva en la educación media, a partir de las necesidades de la CAU. Por último, la importancia de abordar esta práctica, desde un enfoque interdisciplinar e intertextual, para posibilitar comprensiones contextual izadas en los estudiantes. Así, se desarrolló una secuencia didáctica en lectura para la educación media, que permitiera una aproximación a la CAU. En la descripción de estas características de la PL, se utilizó un enfoque metodológico holístico- inductivo-ideográfíco desde la sistematización y el análisis de contenido, en donde, se construyeron categorías de análisis deductivas e inductivas, de las cuales se obtuvieron como resultados más relevantes, la comprensión del texto académico y aprendizajes interdisciplinares en las estudiantes.In this thesis, the characteristics achieved by the reading practice (PL) of middle school students are described, based on an interdisciplinary and intertextual didactic proposal, as an approximation to the university academic culture. For this, three aspects considered important had been addressed. The first, the academic university culture (CAU), from its canon and pre requircments related to the development of reading practice in students to enter this culture, to achieve the disciplinary understandings in their studies. The second, the need to approach academic reading as a discursive practice in secondary education, based on the needs of the CAU. Finally, the importance of addressing this practice, from an interdisciplinary and intertextual approach, to enable contextualized understandings in students. Thus, a didactic sequence was developed in reading for secondary education, which allowed an approximation to the CAU. In the description of these features of PL, a holistic-inductive-idiographic methodological approach was used ffom the systematization and the content analysis, where categories of deductive and inductive analysis were constructed, ffom which they were obtained as more relevant results, comprehension of academic text and interdisciplinary learning in students.Magíster en EducaciónMaestrí

Validez de los criterios DSM-IV según respuesta de los padres en el diagnóstico del trastorno por déficit de atención con hiperactividad.

Introducción. Objetivos: Estudiar la validez para el diagnóstico del trastorno por déficit de atención con hiperactividad (TDAH), de cada uno de los ítems DSM-IV y buscar un modelo reducido de ítems que ayude a detectar casos de niños con TDAH. Sujetos y método. Se utilizan los datos de un estudio epidemiológico sobre TDAH con una muestra de 1095 casos. El 6.6% son TDAH. Casos de TDAH definidos según ADHD RS-IV y criterios clínicos DSM-IV. Controles definidos por exclusión. Resultados. El modelo de regresión logística que mejor predice el fenotipo inatento está compuesto por los ítems del ADHD RS-IV (versión padres) 1, 3, 9, 15 y 17 (Se: 96.7%, Es: 81.5%); el fenotipo hiperactivo/impulsivo por los ítems 2, 4, 10, 12, 14 y 16 (Se: 96.6%, Es: 81%) y el fenotipo combinado por los ítems 9, 10, 12, 14 y 15 (Se: 100 %, Es: 82.6%). Existe una reducción del 66% de los ítems en el fenotipo combinado. Conclusiones. Es posible reducir la lista de síntomas de TDAH con unos niveles de validez adecuados y determinados ítems parecen tener mayor capacidad para determinar decisiones diagnóstica

Prevalence of hazardous alcohol use among Spanish primary care providers

BackgroundAlcohol use by health care professionals is one of the potential factors that may affect the prevention of hazardous drinking in Primary Care (PC). The objective of the study was to estimate the prevalence of hazardous alcohol use by PC professionals and assess the existing relationship between socio-demographic and occupational variables of PC professionals and their alcohol use.MethodsA descriptive, cross-sectional, observational, multicenter study was performed. Location: PC sites of the Spanish National Health Care System (NHS). Participants: Physicians and nurses, who completed an online questionnaire intended to identify the pattern of hazardous alcohol use through the AUDIT-C test. The study population was recruited through random sampling stratified by regions of the PC sites in the NHS. The primary measurements: Frequency of alcohol use, number of drinks containing alcohol on a typical day, frequency of six or more drinks on one occasion.ResultsOne thousand seven hundred sixty professionals completed the questionnaire. Hazardous alcohol use was detected in 27.80% (95% CI: 25.5-29.7) of PC providers. The prevalence of hazardous alcohol use was higher in males (34.2%) [95% CI: 30.4-37.6] and professionals aged 56years or over (34.2%) [95% CI: 28.2-40.2]. The multiple logistic regression analysis revealed a higher hazardous use in males (OR=1.52; 95% CI: 1.22-1.90), PC physicians (OR=1.42; 95% CI: 1.01-2.02) and professionals with more time worked (OR=1.03; 95% CI: 1.01-1.05).ConclusionOur study shows the current prevalence of hazardous alcohol use among Spanish PC providers, revealing a higher percentage of hazardous alcohol use in healthcare professionals compared to the Spanish general population. Further interventions are required to increase the awareness of negative consequences derived from alcohol use among PC professionals and its impact on the clinical setting

Vaccination adjuvated against hepatitis B in Spanish National Healthcare System (SNS) workers typed as non-responders to conventional vaccines

[EN] Trial Design: An interventional, phase 4, single group assignment, without masking (open label), preventive clinical trial was carried out in health workers with biological risk in their tasks, who have been filed as non-responders to conventional vaccination against Hepatitis B. Methods: 67 health workers with biological risk in their tasks, who have been filed as non-responders to conventional vaccination against Hepatitis B, were enrolled in the Clinical Trial. All participants were from 18 years up to 64 years old. Inclusion Criteria: NHS workers -including university students doing their internships in health centres dependent on the National Health System (inclusion of students is regulated and limited by specific instructions on labour prevention in each autonomous community)- classified as non-responders. The criteria defining them as non-responders to the conventional hepatitis B vaccine is anti HBsAb titers < 10 mUI/ml following the application of six doses of conventional vaccine at 20 lg doses (two complete guidelines). The objective of this study was to provide Health workersstaff with an additional protection tool against hepatitis B infection, and to evaluate the efficacy of the adjuvanted vaccine in healthy non-responders to conventional hepatitis B vaccine. The primary outcome was the measurement of antibody antiHBs before the first Fendrix dose and a month after the administration of each dose. Other outcome was collection of adverse effects during administration and all those that could be related to the vaccine and that occur within 30 days after each dose. In this study, only one group was assigned. There was no randomization or masking. Results: The participants were recruited between April 13, 2018 and October 31, 2019. 67 participants were enrolled in the Clinical Trial and included the analyses. The primary immunisation consists of 4 separate 0.5 ml doses of Fendrix , administered at the following schedule: 1 month, 2 months and 6 months from the date of the first dose. Once the positivity was reached in any of the doses, the participant finished the study and was not given the following doses. 68.66% (46 out 67) had a positive response to first dose of Fendrix. 57.14% (12 out 21) had a positive response to second dose of Fendrix . 22.22% (2 out 9) had a positive response to third dose of Fendrix and 42.96% (3 out 7) had a positive response to last dose of Fendrix. Overall, 94.02% (64 out 67) of participants had a positive response to Fendrix . No serious adverse event occurred. Conclusions: The use of Fendrix , is a viable vaccine alternative for NHS workers classified as ‘‘nonresponders”. Revaccination of healthy non-responders with Fendrix, resulted in very high proportions of responders without adverse events. Trial registration: The trial was registered in the Spanish National Trial Register (REEC), ClinicalTrials.gov and inclusion has been stopped (identifier NCT03410953; EudraCT-number 2016-004991-23). Funding: GRS 1360/A/16: Call for aid for the financing of research projects in biomedicine, health management and socio-health care to be developed in the centres of the Regional Health Management of Autonomous Community of Castile-Leon. In addition, this work has been supported by the Spanish Platform for Clinical Research and Clinical Trials, SCReN (Spanish Clinical Research Network), funded by the Subdirectorate General for Research Evaluation and Promotion of the Carlos III Health Institute (ISCIII), through the project PT13/0002/0039 and project PT17/0017/0023 integrated in the State Plan for R&D&I 2013–2016 and co-financed by and the European Regional Development Fund (ERDF)

Lo tangible e intangible del diseño

1 archivo PDF (366 páginas)"El Departamento de Evaluación del Diseño, en el Tiempo de la División de Ciencias y Artes para el Diseño de la Universidad Autónoma Metropolitana, Azcapotzalco, publica este libro colectivo, donde se aborda la discusión y el análisis sobre "Lo tangible e intangible del diseño". Este libro tiene como finalidad el profundizar en distintas posiciones teóricas, metodológicas y empíricas, donde un grupo interdisciplinario de profesores investigadores del Departamento de Evaluación, desde la arquitectura, los estudios urbanos, la educación, la historia, la semiótica, el diseño de la comunicación gráfica y el industrial; buscan convergencias y discuten divergencias que puedan generar servir como referentes intelectuales y teóricos, en el diseño. Este libro es resultado del Cuarto Coloquio Departamental: Lo tangible e Intangible del Diseño. Evaluación de Objetos, Espacios, Mensajes, realizado durante el mes de septiembre del año 2004, el cual se constituyó como un espacio para el intercambio de experiencias académicas y profesionales, desde una perspectiva interdisciplinaria, centrada en la reflexión y la discusión sobre la manera de cómo se puede analizar, definir y evaluar, lo tangible y lo intangible en el diseño"