Use of discrete choice to obtain urban freight evaluation data

The ex-ante evaluation of urban freight solutions is a complex task, due to the interference of different stakeholder groups with different views and objectives. The multi-actor multi-criteria methods have developed as a response to this scenario, but the determination of the weights required by them remains an unclear and controversial task. We propose the use of discrete choice methods as a powerful tool to confront these multi-faced evaluation problems, since the resulting surveys are flexible and easy to respond, and do not give away the final quantitative results. We have applied this methodology to the selection of urban freight solutions in the city of Seville, in Spain, followed by the determination of the relative weights associated to different objectives, both analyses carried out from the side of the carriers stakeholder group.Ministerio de Economía y Competitividad TEC2013-47286-C3-3-

Sexting entre adolescentes españoles: prevalencia y asociación con variables de personalidad

Antecedentes: el envío de contenidos sexuales (p.ej., fotos y vídeos) entre adolescentes a través de Internet y el teléfono móvil, o sexting, está recibiendo atención social creciente. Los objetivos de este estudio fueron: 1) analizar la prevalencia y tendencias por sexo y por edad del sexting entre adolescentes; y 2) examinar el perfil de personalidad de los adolescentes que participan en sexting. Método: participaron 3.223 adolescentes españoles entre 12 y 17 años (49,9% mujeres; edad media = 14,06, DT = 1,37) que completaron de forma anónima y voluntaria autoinformes sobre sexting y sobre los cinco grandes factores de personalidad. Resultados: la prevalencia total del sexting fue del 13,5%. La prevalencia fue del 3,4% a los 12 años y ascendió al 36,1% a los 17, mostrando una tendencia lineal creciente y significativa. En general, no se encontraron diferencias entre varones y mujeres. El perfil de personalidad de quienes se implicaron en sexting se caracterizó por una mayor Extraversión y Neuroticismo y por menor Amabilidad y Responsabilidad. Conclusiones: más allá que adoptar una perspectiva basada en los peligros del sexting, se hace necesario un enfoque educativo que enfatice el uso responsable e informado de las tecnologías de la información y la comunicaciónBackground: Voluntarily sending sexual content (e.g., photos, videos) among adolescents via the Internet and mobile phones, a phenomenon called sexting, is receiving increasing social and research attention. The aims of this study were: 1) to analyze the prevalence and trends of sexting among adolescents by gender and age and 2) to examine the personality profile of adolescents that participated in sexting. Method: The sample consisted of 3,223 Spanish adolescents from 12 to 17 years of age (49.9% female; mean age = 14.06, SD = 1.37) who anonymously and voluntarily completed self-report questionnaires on sexting and the big five personality factors. Results: The overall prevalence of sexting was 13.5%. The prevalence was 3.4% at 12 years old and increased to 36.1% at 17 years of age, showing a growing and significant linear trend. Overall, no differences were found between males and females. The personality profile of those involved in sexting was characterized by higher Extraversion and Neuroticism and by lower scores in Conscientiousness and Agreeableness. Conclusions: Given its high prevalence, beyond adopting a perspective based on the dangers of sexting, an educational approach that emphasizes responsible and informed use of information and communication technologies is necessary.Fil: Gámez Guadix, Manuel. Universidad Autónoma de Madrid; EspañaFil: de Santisteban, Patricia. Universidad Autónoma de Madrid; EspañaFil: Resett, Santiago Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15; Argentina. Universidad Nacional de Entre Ríos; Argentin

Coeducación físico-química: trucos caseros en el aula

ReviewReseñ

Dynamic approach to solve the daily drayage problem with travel time uncertainty

The intermodal transport chain can become more e cient by means of a good organization of drayage movements. Drayage in intermodal container terminals involves the pick up and delivery of containers at customer locations, and the main objective is normally the assignment of transportation tasks to the di erent vehicles, often with the presence of time windows. This scheduling has traditionally been done once a day and, under these conditions, any unexpected event could cause timetable delays. We propose to use the real-time knowledge about vehicle position to solve this problem, which permanently allows the planner to reassign tasks in case the problem conditions change. This exact knowledge of the position of the vehicles is possible using a geographic positioning system by satellite (GPS, Galileo, Glonass), and the results show that this additional data can be used to dynamically improve the solution

Spray Drying of Goat Milk Protein Hydrolysates with Angiotensin Converting Enzyme Inhibitory Activity

A goat milk hydrolysate was stabilized by spray drying using different inlet air temperatures (170-230 °C) and feed flow rates (4-12 mL/min) following a central composite experimental design. In order to evaluate the effect of operational conditions on process yield, powder properties (density, moisture, hygroscopicity, and solubility) as well as angiotensin converting enzyme (ACE) inhibitory activity, experimental data were analyzed by response surface methodology. Input variables showed a significant influence on yield, density, and moisture, while hygroscopicity, solubility, and ACE inhibitory activity were not affected. The dried hydrolysate presented an average IC50 value of 273.13 μg/mL, which involved a loss of 25 % in ACE inhibitory activity with respect to the feed. The variations detected in the low molecular weight fractions of the dried hydrolysates could be responsible for the variations in ACE inhibitory activity.Consejería de Innovación, Ciencia y Empresa of Junta de Andalucía (P07-TEP-02579

Homophobia is online: sexual victimization and risks on the internet and mental health among bisexual, homosexual, pansexual, asexual, and queer adolescents

The first aim of this study was to analyze the prevalence and frequency of different forms of online sexual victimization and risks among sexual minorities, including sexting, sexual orientation- and gender-based victimization, unwanted sexual attention, sextortion, and revenge porn. The second aim was to examine whether online sexual victimization and risks mediate the relationship between being a sexual minority and mental health outcomes, including depression and anxiety. The sample was composed of 1779 adolescents (50.9% girls) between 12 and 18 years old (mean age = 13.92, SD = 1.27), and 146 of them (8.2%) were sexual minorities (specifically, bisexual, homosexual, pansexual, asexual, or queer adolescents). About 17.3% of sexual minority adolescents have sent a sext. Four out of ten adolescents (41.1%) had experienced online sexual orientation discrimination and 28.4% gender-based victimization. More than forty percent (45.2%) experienced unwanted sexual attention, 9% were victims of sextortion, and 5.5% had been targets of revenge porn. Sexting, online sexual orientation victimization and gender-based victimization, and unwanted sexual attention partially mediated the relationship between being a sexual minority and mental health outcomes (i.e., depression and anxiety). More prevention programs aimed to reduce online sexual victimization and risks for sexual minorities are neededFunding for this study was provided by Ministerio de Ciencia e Innovación (Spanish Government) grant RTI2018-101167-B-I0

Exposición a la Violencia entre los Padres, Prácticas de Crianza y Malestar Psicológico a Largo Plazo de los Hijos

ResumenEl primer objetivo de este estudio fue analizar la relación entre la exposición a la violencia intraparental durante la infancia y el grado de malestar psicológico de los hijos en la edad adulta, y si dicha relación está mediada por un deterioro de las prácticas de crianza de los padres (i.e., la disciplina severa, las demostraciones de afecto y apoyo y la inconsistencia inter e intraparental). Un segundo objetivo consistió en examinar las diferencias por sexo en las relaciones estudiadas. La muestra estuvo compuesta por 680 estudiantes universitarios (62.4% mujeres) seleccionados por muestreo aleatorio, estratificado y proporcional (por facultad y sexo). Los participantes informaron retrospectivamente acerca de si habían presenciado violencia entre sus padres, las pautas de crianza recibidas en la infancia y su nivel de malestar psicológico actual. Los resultados indicaron que la disciplina severa (castigo físico y psicológico) y las demostraciones de afecto y apoyo mediaron parcialmente la relación entre la exposición a la violencia marital y el nivel de malestar de los hijos a largo plazo. Además, no se encontraron diferencias por sexo en las relaciones especificadas. Finalmente, se discuten los hallazgos del estudio, sus limitaciones y las implicaciones para la planificación de programas de intervención.AbstractThe first objective of this study was to examine the relationship between witnessing interparental violence and children's long-term psychological distress, and the extent to which this relation is mediated by deteriorating parenting practices (i.e., harsh discipline, affection/support, interparental and intraparental consistency). The second objective was to analyze the possible gender differences in the relationships specified. The sample comprised 680 Spanish university students (62.4% females) selected by random, stratified, and proportional sampling (by faculty and sex). Participants retrospectively reported the physical and psychological violence perpetrated by one of his or her parents against the other, the parenting practices when they were preadolescents, and the psychological distress during the past two weeks. Results revealed that harsh discipline and the level of affection and affection/support partially mediated the association between children's witnessing interparental violence and their long-term psychological distress. These relationships were not significantly different as a function of participants’ sex. Lastly, we discuss the implications of these findings for the planning and development of intervention programs