Search results for "Viti"
showing 10 items of 4520 documents
Dynamical analysis of electron transport in RF cavities and photomultipliers tubes
2021
El objetivo de este trabajo es el estudio de la dinámica de haces y corrientes de electrones en cavidades aceleradoras de radiofrecuencia (RF) y en tubos fotomultiplicadores. Por una parte, los haces de electrones presentan una gran importancia histórica tanto en aplicaciones directas (televisiones, hornos de microondas, tratamiento del cáncer), como en la generación de radiación sincrotrón. La última generación de fuentes de rayos X muy brillantes se basa en los láseres de electrones libres (XFEL). No obstante, para producir los haces de electrones que emitirán dichos rayos X como radiación sincrotrón, se necesitan campos eléctricos de gran intensidad lo que produce que, debido a la emisió…
Biological responses of midge (Chironomus riparius) and lamprey (Lampetra fluviatilis) larvae in ecotoxicity assessment of PCDD/F-, PCB- and Hg-conta…
2016
We evaluated the utility of chironomid and lamprey larval responses in ecotoxicity assessment of polychlorinated dibenzo-p-dioxins, dibenzofurans (PCDD/F)-, polychlorinated biphenyls (PCB)- and mercury (Hg)-contaminated river sediments. Sediment samples were collected from the River Kymijoki with a known industrial pollution gradient. Sediment for the controls and lamprey larvae were obtained from an uncontaminated river nearby. Contamination levels were verified with sediment and tissue PCDD/F, PCB and Hg analyses. Behaviour of sediment-exposed chironomid and lamprey larvae were measured with Multispecies Freshwater Biomonitor© utilizing quadrupole impedance conversion technique. In additi…
Patterns on Work-Related Stress and Tobacco Consumption in City Bus Drivers
2018
Work-related stress and addictive behaviors have been described by several empirical studies as potential impairers for the health, welfare, and safety of workers. With this study, we aimed at describing the relationship between two work stress (Job Strain and Effort-Reward Imbalance) and tobacco consumption indicators among city bus drivers, and their association with traffic incidents registered by drivers along the last 2 years. For this cross-sectional study, the sample included 222 Colombian city bus drivers with a mean age of 41.4 years and driving experience of 18.63 years. A four-section questionnaire was used, and it was composed of individual (professional/demographic) information…
Stress, angst og selvtillit i toppfotball : Hvilken betydning har mental tøffhet for angst og selvtillit i forkant av kampsituasjon blant fotballspil…
2017
Masteroppgave idrettsvitenskap ME517 - Universitetet i Agder 2017 Stress, anxiety and self-esteem are key concepts in sports psychology and performance. How these factors affect athletes in terms of achievement is an interesting area and the main background for this study. The purpose of this study was to investigate the meaning of mental toughness (MT) compared to cognitive anxiety, somatic anxiety and self-esteem ahead of soccer matches among high-level soccer players. The selection in this study was the first-team squad of Arendal fotball, consisting of 23 players from 18 to 37 years of age. During the project, Arendal fotball took part in the PostNord-league section four, which represen…
Emotional self-regulation through music in 3-8-year-old children
2009
The current study explored the role of music in children’s emotional self-regulation. Music is shown to be a common and effective way of self-regulating emotions in adolescence and adulthood. It is also widely known that parents use music to regulate the emotions of their babies, for instance in calming them down by lullabies. However, very little is known about how children themselves use music for emotional needs, and how the self-regulatory emotional engagement develops. A survey study was conducted with parents of 63 children including 37 boys and 26 girls, aged between 2.9 to 8.1 years. The parents answered questions about their child’s musical activities, preferences, and emotion-regu…
Infrastructural and Human Factors Affecting Safety Outcomes of Cyclists
2018
The increasing number of registered road crashes involving cyclists during the last decade, and the high proportion of road crashes resulting in severe injuries and fatalities among cyclists constitutes a global issue for community health, urban development, and sustainability. Nowadays, the incidence of many risk factors for road crashes of cyclists remains largely unexplained. Given the importance of this issue, the present study has been conducted with the aim of determining relationships between infrastructural, human factors and safety outcomes of cyclists. Objectives: This study aimed, first, to examine the relationship between key infrastructural and human factors present in cycling,…
Sensory-Adapted Dental Environment for the Treatment of Patients with Autism Spectrum Disorder.
2022
Purpose: The importance of dental care and oral hygiene is often underestimated in people with autism spectrum disorder (ASD). Comorbidity with dental anxiety is greater in ASD subjects who also show unusual reactions to sensory stimuli. The aim of our study was to assess the efficacy for a sensory-adapted environment and targeted methods in reducing anxiety and positively influencing cooperation in children with ASD during a dental examination or specific treatments. Material and methods: The sample consisted of 50 Italian children with a diagnosis of ASD (36 males and 14 females; aged 9–10 years) presenting with mild intellectual disability (ID) and verbal language skills. The subjects en…
INDUSTRIES IN CENTRAL AND EASTERN EUROPE ARE MAKING STRIDES TOWARD SERVITIZATION
2014
This paper is intended to examine, without empirical evidence, the way industries in Central and Eastern Europe are heading toward convergence of knowledge-intensive sectors. Emboldened by European Union’s commitment to become the world’s most competitive entity, industries in the new member countries are phasing out low skilled labor-intensive activities such as subcontracting of final assembly, concomitantly trying to integrate skilled labor-intensive inputs in production. Following a powerful trend that is manifest in global manufacturing, firms in the region are endeavoring to enhance the value of their offerings by providing knowledge-intensive services in addition to physical products…