INTRAPERSONAL AND SOCIAL FACTORS FOR PROBLEMATIC INTERNET USE AMONG STUDENTS DURING THE COVID-19 PANDEMIC

Background: During the lockdown due to COVID-19, Internet use may become more frequent in students, with possible negative consequences on mental health. In this emergency situation, variables such as depression, anxiety and external locus of control could be related to a Problematic Internet Use; on the other hand, self-esteem, internal locus of control, self-efficacy, and social support can play the role of protective factors for Problematic Internet Use. The present survey aims to verify the impact of these intrapersonal and social factors on Problematic Internet Use in college and High School students during the COVID-19 pandemic through a web-based cross-sectional study. Subjects and methods: 191 students from Lombardy, one of the Italian Regions among the most affected by the COVID-19 pandemic, were included in the study. An online questionnaire has been administered during the first Italian period of forced lockdown. A logistic regression analysis was performed to assess intrapersonal and social factors as predictors of Problematic Internet Use. Results: Analysis highlighted a higher risk of Problematic Internet Use (5.77 times more) in males compared to females. Individuals with high external locus of control and severe depression have respectively 6.56 and 2.84 times more the risk of presenting Problematic Internet Use. In contrast, social support, self-efficacy, and self-esteem were negatively related to Problematic Internet Use. In total sample, the percentage of Problematic Internet Use was high (55.5%). Conclusions: An increasing use of the Internet has been observed during lockdown, leading to a progressive increase in the diffusion of Problematic Internet Use. Gender, depression and external locus of control emerge as risk factors for Problematic Internet Use, while social support, self-efficacy and self-esteem represent protective factors. The current research identifies some intrapersonal and social factors in an epidemic context for which the development of effective behavioural, supportive and/or educational interventions would be appropriate

INTRAPERSONAL AND SOCIAL FACTORS FOR PROBLEMATIC INTERNET USE AMONG STUDENTS DURING THE COVID-19 PANDEMIC

Background: During the lockdown due to COVID-19, Internet use may become more frequent in students, with possible negative consequences on mental health. In this emergency situation, variables such as depression, anxiety and external locus of control could be related to a Problematic Internet Use; on the other hand, self-esteem, internal locus of control, self-efficacy, and social support can play the role of protective factors for Problematic Internet Use. The present survey aims to verify the impact of these intrapersonal and social factors on Problematic Internet Use in college and High School students during the COVID-19 pandemic through a web-based cross-sectional study. Subjects and methods: 191 students from Lombardy, one of the Italian Regions among the most affected by the COVID-19 pandemic, were included in the study. An online questionnaire has been administered during the first Italian period of forced lockdown. A logistic regression analysis was performed to assess intrapersonal and social factors as predictors of Problematic Internet Use. Results: Analysis highlighted a higher risk of Problematic Internet Use (5.77 times more) in males compared to females. Individuals with high external locus of control and severe depression have respectively 6.56 and 2.84 times more the risk of presenting Problematic Internet Use. In contrast, social support, self-efficacy, and self-esteem were negatively related to Problematic Internet Use. In total sample, the percentage of Problematic Internet Use was high (55.5%). Conclusions: An increasing use of the Internet has been observed during lockdown, leading to a progressive increase in the diffusion of Problematic Internet Use. Gender, depression and external locus of control emerge as risk factors for Problematic Internet Use, while social support, self-efficacy and self-esteem represent protective factors. The current research identifies some intrapersonal and social factors in an epidemic context for which the development of effective behavioural, supportive and/or educational interventions would be appropriate

The effect of foot setting on kinematic and kinetic skiing parameters during giant slalom: A single subject study on a Paralympic gold medalist sit skier

Objectives: Aim was to study the effect of monoski foot adjustment on kinematic and kinetic skiingparameters expressing sit skier\u2019s technique.Design: Independent variable was skier position with respect to bindings, acting on position of monoskifoot sole clamp. Front (F), Mid (M) and Rear (R) settings changed with intervals of 20 mm. Course time,skiing speed, Ground Reaction Forces (GRFs) magnitude and point of application and damper stroke weredependent variables.Method: A Paralympic monoski was equipped with a dynamometric binding plate measuring GRFs, rolland pitch moments. A Paralympic gold medalist (LW10-1) was involved. Skier trajectory and gates loca-tion were measured by a differential global navigation satellite system (GNSS) in steep and medium steepslope portions. The athlete performed two giant slalom runs for each foot setting the same day.Results: GRFs, center of pressure (COP) and variations with foot settings were measured. Peaks valuesup to 3.36 times the total weight and damper speed of 675 mm/s in compression were found. Fastestruns, highest peak loads and best subjective ratings were recorded with F setting. COP mean values wereinfluenced by foot adjustments. GRFs in left turns were 54% larger than in the right turns with F settingon steep slope.Conclusions: The monoski foot adjustment influenced kinematic and kinetic skiing, with F setting showingbest results. A skier asymmetric behavior between right and left turning was discovered. Findings cansupport the design of monoskis for a wider dissemination of Paralympic alpine sit skiing

The effect of foot setting on kinematic and kinetic skiing parameters during giant slalom: A single subject study on a Paralympic gold medalist sit skier

Objectives: Aim was to study the effect of monoski foot adjustment on kinematic and kinetic skiing parameters expressing sit skier’s technique. Design: Independent variable was skier position with respect to bindings, acting on position of monoski foot sole clamp. Front (F), Mid (M) and Rear (R) settings changed with intervals of 20 mm. Course time, skiing speed, Ground Reaction Forces (GRFs) magnitude and point of application and damper stroke were dependent variables. Method: A Paralympic monoski was equipped with a dynamometric binding plate measuring GRFs, roll and pitch moments. A Paralympic gold medalist (LW10-1) was involved. Skier trajectory and gates location were measured by a differential global navigation satellite system (GNSS) in steep and medium steep slope portions. The athlete performed two giant slalom runs for each foot setting the same day. Results: GRFs, center of pressure (COP) and variations with foot settings were measured. Peaks values up to 3.36 times the total weight and damper speed of 675 mm/s in compression were found. Fastest runs, highest peak loads and best subjective ratings were recorded with F setting. COP mean values were influenced by foot adjustments. GRFs in left turns were 54% larger than in the right turns with F setting on steep slope. Conclusions: The monoski foot adjustment influenced kinematic and kinetic skiing, with F setting showing best results. A skier asymmetric behavior between right and left turning was discovered. Findings can support the design of monoskis for a wider dissemination of Paralympic alpine sit skiing

Cannabis use and related clinical variables in patients with obsessive-compulsive disorder

Objective Limited studies have investigated cannabis use in patients with obsessive-compulsive disorder (OCD), despite its widespread use by patients with psychiatric illnesses. The aim of this study was to assess the frequency, correlates, and clinical impact of cannabis use in an Italian sample of patients with OCD. Methods Seventy consecutive outpatients with OCD were recruited from a tertiary specialized clinic. To assess cannabis-related variables, patients completed a questionnaire developed for the purpose of this study, investigating cannabis use-related habits and the influence of cannabis use on OCD symptoms and treatments. A set of clinician and self-reported questionnaires was administered to measure disease severity. The sample was then divided into three subgroups according to the pattern of cannabis use: "current users" (CUs), "past-users" (PUs), and "non-users" (NUs). Results Approximately 42.8% of patients reported lifetime cannabis use and 14.3% reported current use. Approximately 10% of cannabis users reported an improvement in OCD symptoms secondary to cannabis use, while 23.3% reported an exacerbation of anxiety symptoms. CUs showed specific unfavorable clinical variables compared to PUs and NUs: a significant higher rate of lifetime use of tobacco, alcohol, and other substances, and a higher rate of pre-OCD onset comorbidities. Conversely, the three subgroups showed a similar severity of illness. Conclusion A considerable subgroup of patients with OCD showed a predisposition towards cannabis use and was associated with some specific clinical characteristics, suggesting the need for targeted consideration and interventions in this population

Track Reconstruction with Cosmic Ray Data at the Tracker Integration Facility

The subsystems of the CMS silicon strip tracker were integrated and commissioned at the Tracker Integration Facility (TIF) in the period from November 2006 to July 2007. As part of the commissioning, large samples of cosmic ray data were recorded under various running conditions in the absence of a magnetic field. Cosmic rays detected by scintillation counters were used to trigger the readout of up to 15\,\% of the final silicon strip detector, and over 4.7~million events were recorded. This document describes the cosmic track reconstruction and presents results on the performance of track and hit reconstruction as from dedicated analyses