On the Comparison of Stochastic Model Predictive Control Strategies Applied to a Hydrogen-based Microgrid

In this paper, a performance comparison among three well-known stochastic model predictive control approaches, namely, multi-scenario, tree-based, and chance-constrained model predictive control is presented. To this end, three predictive controllers have been designed and implemented in a real renewable-hydrogen-based microgrid. The experimental set-up includes a PEM electrolyzer, lead-acid batteries, and a PEM fuel cell as main equipment. The real experimental results show significant differences from the plant components, mainly in terms of use of energy, for each implemented technique. Effectiveness, performance, advantages, and disadvantages of these techniques are extensively discussed and analyzed to give some valid criteria when selecting an appropriate stochastic predictive controller.Ministerio de Economía y Competitividad DPI2013-46912-C2-1-RMinisterio de Economía y Competitividad DPI2013-482443-C2-1-

On the comparison of stochastic model predictive control strategies applied to a hydrogen-based microgrid

© . This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/In this paper, a performance comparison among three well-known stochastic model predictive control approaches, namely, multi-scenario, tree-based, and chance-constrained model predictive control is presented. To this end, three predictive controllers have been designed and implemented in a real renewable-hydrogen-based microgrid. The experimental set-up includes a PEM electrolyzer, lead-acid batteries, and a PEM fuel cell as main equipment. The real experimental results show significant differences from the plant components, mainly in terms of use of energy, for each implemented technique. Effectiveness, performance, advantages, and disadvantages of these techniques are extensively discussed and analyzed to give some valid criteria when selecting an appropriate stochastic predictive controller.Peer ReviewedPostprint (author's final draft

Psychophysiological and psychosocial profile of patients attending drug addiction centers

Drug treatment centres provide the highest level of rehab services for patients diagnosed with drug addictions. Most inpatient drug rehab programs focus on medical detox and mental health interventions. However, how to optimize the later remains a challenge. The aim of this study was to examine the psychophysiological and psychosocial profile of patients attending drug addiction centres in comparation with the general population. A total of 105 inpatient drug rehab patients and 50 participants from the general population were compared based on standardized psychophysiological and psychosocial measures. Results of this study suggest that patients attending drug addiction centers differ from general population in several different psychophysiological and psychosocial factors. Patients reported significantly lower levels of physical activity and increased sympathetic responsiveness, and significantly higher levels in loneliness, psychologically inflexibility and neuroticism. The results of this study highlight the importance of address healthy lifestyle behaviors such as sport practice and psychological variables such as loneliness, psychological (in)flexibility and neuroticism to improve current programs aim to prevent or reduce problematic drug consumptions

Galician multidisciplinary consensus about the use of lipid-lowering drugs

Se desarrolla un consenso multidisciplinar sobre el uso de hipolipemiantes, pues las cifras de consumo de hipolipemiantes han aumentado considerablemente en los ultimos años, Las últimas guías publicadas han levantado bastante polémica y se considera necesario la realización de este consenso e identificar los niveles de riesgo de los pacientes, para tratar las dislipemias y normalizar el uso de hipolipemientes. Se realiza una mención especial al tratamiento de la dislipemia en la enfermedad renal crónica

Monitorización del consumo de sustancias de abuso legales e ilegales en España a través de las aguas residuales en el marco de la red ESAR-Net

Trabajo presentado en el 4th Congreso Internacional y XLIX Jornadas Nacionales de Socidrogalcohol - VIII Congreso Nacional Patología Bio-Psicosocial, celebrado en Tenerife del 06 al 08 de octubre de 2022

Binge drinking: conductas sexuales de riesgo y drogas facilitadoras del asalto sexual en jóvenes españoles

Drug use (alcohol included) as a sexual-assault facilitator and risky sexual behavior are two important issues from a social and health perspective. This study aims to compare the attitudes towards these variables in a sample of 164 young people in conditions of intoxication vs sobriety. The sample consisted of 82 men and 82 women. Their mean age was 27.50 (SD = 3.72). Participants answered a sociodemographic questionnaire, a drug information questionnaire, and the Sexual Behaviors Scale. and moreover, Several Zaphir Deluxe Digital breathalyzers were also used to monitor alcohol level. This is a quasi- experimental study conducted using a within-subject design. Non-probabilistic snowball sampling was used. The results showed more positive attitudes and greater intentions towards the use of drugs as facilitators of sexual assault and risky sexual behaviors in those who are under the influence of alcohol in recreational contexts, regardless of the sex of the sample. These results showed, on the one hand, the importance of studies into the use of drug facilitated sexual assault –a largely ignored issue in Spain– and to determine how drug use affects the use of contraceptive methods. On the other hand, the results show the need to include information in preventive programs about the way alcohol (and other drugs) use is related to sexual activity.El uso de drogas —alcohol incluido— como facilitadoras del asalto sexual y las conductas sexuales de riesgo son dos fenómenos relevantes desde una perspectiva sociosanitaria. El objetivo de la presente investigación es comparar las actitudes hacia estas variables en una muestra de 164 jóvenes en condiciones de intoxicación etílica frente a sobriedad. La muestra está compuesta por 82 varones y 82 mujeres. Su media de edad era 27.50 ± 3.72. Contestaron un cuestionario en el que se recogen datos sociodemográficos, información del consumo de drogas y la Escala de Conductas Sexuales; además, se emplearon varios etilómetros Digital Zaphir Deluxe para determinar la alcoholemia. Se trata de un estudio cuasiexperimental realizado sobre un diseño intraindividual. El muestreo es no probabilístico de tipo “bola de nieve”. Los resultados muestran unas actitudes más positivas y una mayor intencionalidad hacia el empleo de drogas como facilitadoras del asalto sexual y hacia las conductas sexuales de riesgo de los sujetos que se encuentran bajo el efecto del alcohol en contextos recreativos, independientemente del sexo de la muestra. Se destaca, por un lado, la importancia de investigar sobre el uso de drogas como facilitadoras del asalto sexual (tema ampliamente ignorado en España) y se profundiza en cómo el consumo de drogas afecta al uso de métodos anticonceptivos, y por otro, la necesidad de incluir información en los programas preventivos sobre cómo el consumo de alcohol (y otras drogas) está relacionado con la actividad sexual

Consumo intensivo de alcohol y cannabis, y prácticas sexuales de riesgo en estudiantes universitarios

Resumen: Objetivo: Determinar la incidencia de las prácticas sexuales de riesgo entre universitarios y su asociación con el consumo intensivo de alcohol y el consumo de cannabis. Método: Se realizó un estudio de cohortes entre 2005 y 2011 en universitarios de la Cohorte Compostela (n = 517). El consumo intensivo de alcohol se midió con la tercera pregunta del Alcohol Use Disorders Identification Test (AUDIT). Las prácticas sexuales de riesgo se midieron como sexo bajo la influencia del alcohol (SBA) y sexo sin condón (SSC). Se generaron modelos de regresión logística. Resultados: Las incidencias de SBA fueron del 40,9% y 53,0%, y las de SSC del 13,7% y el 25,7%, para mujeres y hombres, respectivamente. El consumo intensivo de alcohol y el consumo de cannabis se han mostrado asociados al SBA tanto en mujeres (odds ratio [OR] = 2,08, intervalo de confianza del 95% [IC95%]: 1,03-4,21); OR = 2,78, IC95%:1,57-4,92) como en hombres (OR = 4,74, IC95%:1,49-15,09; OR = 4,37, IC95%:1,17-16,36). El consumo de cannabis en las mujeres también se mostró asociado al SSC (OR = 2,96, IC95%:1,52-5,75). Las fracciones atribuibles poblacionales de SBA para el consumo intensivo de alcohol fueron del 24,7% para las mujeres y del 52,9% para los hombres. Conclusiones: El consumo intensivo de alcohol y el consumo de cannabis constituyen problemas de salud pública debido a su asociación con una variedad de problemas, incluidas las prácticas sexuales de riesgo. Nuestros resultados permiten sugerir que una importante proporción de las prácticas de sexo no seguro podrían evitarse reduciendo este patrón de consumo de alcohol. Abstract: Objective: To determine the incidence of unsafe sex among university students and its association with heavy episodic drinking (HED) and cannabis use. Method: A cohort study was carried out from 2005 to 2011 among university students of the Compostela Cohort (n = 517). HED was measured using the third question of the Alcohol Use Disorders Identification Test (AUDIT). Unsafe sex was considered to be sex under the influence of alcohol (SUA) and sex without a condom (SWC). Logistic regression models were created. Results: The incidence of SUA was 40.9% for women and 53.0% for men, while the SWC incidence ranged from 13.7% for women to 25.7% for men. HED and cannabis use were associated with SUA in both women (OR = 2.08, 95% CI: 1.03-4.21; OR = 2.78, 95%CI: 1.57-4.92) and men (OR = 4.74 (95%CI: 1.49-15.09; OR = 4.37, 95%CI: 1.17- 16.36). Moreover, cannabis use in women was associated with SWC (OR = 2.96, 95%CI: 1.52-5.75). The population attributable fractions of SUA for HED were 24.7% and 52.9% for women and men, respectively. Conclusions: HED and cannabis use represent a public health problem due to their association with a variety of problems, including engagement in unsafe sex. Our results suggest that a significant proportion of unsafe sex could be avoided by reducing this consumption pattern of alcohol. Palabras clave: Prácticas sexuales de riesgo, Consumo intensivo de alcohol, Cannabis, Estudiantes universitarios, Keywords: Unsafe sex, Heavy episodic drinking, Cannabis, University student

On the comparison of stochastic model predictive control strategies applied to a hydrogen-based microgrid

© . This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/In this paper, a performance comparison among three well-known stochastic model predictive control approaches, namely, multi-scenario, tree-based, and chance-constrained model predictive control is presented. To this end, three predictive controllers have been designed and implemented in a real renewable-hydrogen-based microgrid. The experimental set-up includes a PEM electrolyzer, lead-acid batteries, and a PEM fuel cell as main equipment. The real experimental results show significant differences from the plant components, mainly in terms of use of energy, for each implemented technique. Effectiveness, performance, advantages, and disadvantages of these techniques are extensively discussed and analyzed to give some valid criteria when selecting an appropriate stochastic predictive controller.Peer Reviewe

Heavy drinking and alcohol-related injuries in college students

Objective: The main objective of this study is to evaluate the effect of heavy drinking on alcohol-related injuries. Material and methods: We carried out an open cohort study among university students in Spain (n = 1,382). Heavy drinking and alcohol-related injuries were measured by administrating AUDIT questionnaires to every participant at the ages of 18, 20, 22 and 24. For data analysis we used a Multilevel Logistic Regression for repeated measures adjusting for consumption of alcohol and cannabis. Results: The response rate at the beginning of the study was 99.6% (1,369 students). The incidence rate of alcohol-related injuries was 3.2 per 100 students year. After adjusting for alcohol consumption and cannabis use, the multivariate model revealed that a high frequency of heavy drinking was a risk factor for alcohol-related injuries (Odds Ratio = 3.89 [95%CI: 2.16 – 6.99]). The proportion of alcohol-related injuries in exposed subjects attributable to heavy drinking was 59.78% [95%CI: 32.75 – 75.94] while the population attributable fraction was 45.48% [95%CI: 24.91 – 57.77]. Conclusion: We can conclude that heavy drinking leads to an increase of alcohol-related injuries. This shows a new dimension on the consequences of this public concern already related with a variety of health and social problems. Furthermore, our results allow us to suggest that about half of alcohol-related injuries could be avoided by removing this consumption pattern

Experimental and numerical investigation of a PEMFC single cell and stack analysis

The present paper describes the work being done by INTA and University of Seville – AICIA in the framework of a joint research project in the field of Proton Exchange Membrane Fuel Cells (PEMFC). The main objective of the project is to develop a novel methodology for the characterization and investigation of fuel cell stacks, that combines experimental and Computational Fluid Dynamics (CFD) analysis. A CFD model based on the PEMFC Module implemented in FLUENT software is being developed for a single cell, and the polarization curve obtained is being validated against experimental results obtained at INTA facilities. At a second stage of the investigation, a method for the extrapolation of CFD single cell results to the complete stack is developed. The extrapolation method is being validated against experimental results obtained for the fuel cell stack with different numbers of cells. This paper describes the results of the early stages of the investigation and presents the methodology developed for the project. The developed model would allow researchers to use CFD for the complete fuel cell stack with reasonable computing facilities