Search results for "performance"
showing 10 items of 4457 documents
Positron production using a 9 MeV electron linac for the GBAR experiment
2020
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses a low-energy electron linear accelerator (linac). The driver linac produces electrons of 9 MeV kinetic energy that create positrons from bremsstrahlung-induced pair production. Staying below 10 MeV ensures no persistent radioactive activation in the target zone and that the radiation level outside the biological shield is safe for public access. An annealed tungsten-mesh assembly placed directly behind the target acts as a positron moderator. The system produces $5\times10^7$ slow positrons per second, a performan…
Polyphenols and Pharmacological Screening of a Monarda fistulosa L. dry Extract Based on a Hydrodistilled Residue By-Product
2021
This study aimed to determine the composition and content of polyphenols in the dry extract obtained from the hydrodistilled residue by-product of the wild bergamot (Monarda fistulosa L., Lamiaceae Martinov family) herb (MFDE) and to evaluate its safety and pharmacological properties. The total phenolic content (TPC) in the MFDE was 120.64 mg GAE/g. The high-performance liquid chromatography (HPLC) analysis showed the presence of a plethora of phenolic compounds, including hydroxycinnamic acids and flavone derivatives in the MFDE, with rosmarinic acid and luteolin-7-O-glucoside being the main components. With an IC50 value of 0.285 mg/mL, it was found to be a strong DPPH radical scavenger. …
Les déterminants personnels du bien-être de l’écolier, de ses satisfactions en classe et de sa performance scolaire
2017
This work focuses on the study of personal determinants of pupils' achievement and reactions toward class (well-being; satisfaction with teacher, learning and class). A theoretical model is tested by commonality analysis and refined by causal paths analysis. The results show that external and cognitive prior characteristics (age, gender, socio-occupational background, academic record) have direct effects on criteria variables, and indirectly via the attitudes toward school (negative feelings; scholastic interest; aspirations for future studies; "scholastic anxiety, worry and stress"; fun school). Using two structural models, we explained 39 % of the variance in academic achievement, and fro…
A post-exercise infrared sauna session improves recovery of neuromuscular performance and muscle soreness after resistance exercise training
2023
The aim of this study was to investigate effects of a single infrared sauna (IRS) session on postexercise recovery of neuromuscular performance, autonomic nervous system function, subjective sleep quality, and muscle soreness. Male basketball players (n = 16) performed two trials consisting of a complex resistance exercise protocol (maximal strength with plyometrics), followed by either 20 min passive recovery (PAS) or IRS (temperature 43±5°C), in a randomized crossover design, with trials separated by one week. Recovery of neuromuscular performance was assessed using 20 m maximal sprint, maximal countermovement-jump (CMJ), and isometric leg press tests, performed 14 hours after exercise. H…
Communication Health Check : Measuring Corporate Communication Performance
2015
A Communication Health Check, based on an existing tool for measuring communication quality, was customized for Finnish companies and supporting software was developed to create an online tool. A pilot measurement procedure was performed in a medium-sized company based in the country’s capital, Helsinki. The aim was to see if the tool would be useful in the Finnish context, and whether a benchmarking function or further customization would be preferred. The tool was considered easy to use by the respondents and its main function was considered to be enabling organizational learning. peerReviewed
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 in Sport and Performance
2018
Emotions are multifaceted subjective feelings that reflect expected, current, or past interactions with the environment. They involve sets of interrelated psychological processes, encompassing affective, cognitive, motivational, physiological, and expressive or behavioral components. Emotions play a fundamental role in human adaptation and performance by improving sensory intake, detection of relevant stimuli, readiness for behavioral responses, decision-making, memory, and interpersonal interactions. These beneficial effects enhance human health and performance in any endeavor, including sport, work, and the arts. However, emotions can also be maladaptive. Their beneficial or maladaptive e…
The Dynamic Relationship between Response Processes and Self-Regulation in Critical Thinking Assessments
2021
Our aim was to explore higher education students’ response and self-regulatory processes plus the relationship between these, as evidenced in two types of performance-based critical thinking tasks included in the Collegiate Learning Assessment (CLA+) International instrument. The data collection consisted of 20 cognitive laboratories. The data were analyzed using a qualitative approach. The tasks were found to trigger different response and self-regulatory processes. Overall, the performance task evoked more holistic processes than the selected-response questions, in which students’ processes were more question-oriented. The results also indicated the entanglement of students’ response and …
The pblm package: semiparametric regression for bivariate categorical responses in R
2014
We present an R package to fit semiparametric regression models for two categorical responses. It works for both nominal and ordered responses and several types of logits can be specified. Proportional, non-proportional and partial proportional odds models can be fitted, with marginal and association parameters estimated in a parametric or semiparametric way, via penalized maximum likelihood estimation. An application to show the potential of the package is carried out on a data set of Italian university students.
Sex-specific signatures of intrinsic hippocampal networks and regional integrity underlying cognitive status in multiple sclerosis
2021
Abstract The hippocampus is an anatomically compartmentalized structure embedded in highly wired networks that are essential for cognitive functions. The hippocampal vulnerability has been postulated in acute and chronic neuroinflammation in multiple sclerosis, while the patterns of occurring inflammation, neurodegeneration or compensation have not yet been described. Besides focal damage to hippocampal tissue, network disruption is an important contributor to cognitive decline in multiple sclerosis patients. We postulate sex-specific trajectories in hippocampal network reorganization and regional integrity and address their relationship to markers of neuroinflammation, cognitive/memory per…