Search results for "internet"
showing 10 items of 2589 documents
Bayesian prediction inM/M/1 queues
1994
Simple queues with Poisson input and exponential service times are considered to illustrate how well-suited Bayesian methods are used to handle the common inferential aims that appear when dealing with queue problems. The emphasis will mainly be placed on prediction; in particular, we study the predictive distribution of usual measures of effectiveness in anM/M/1 queue system, such as the number of customers in the queue and in the system, the waiting time in the queue and in the system, the length of an idle period and the length of a busy period.
Optimal Paths on Urban Networks Using Travelling Times Prevision
2012
We deal with an algorithm that, once origin and destination are fixed, individuates the route that permits to reach the destination in the shortest time, respecting an assigned maximal travel time, and with risks measure below a given threshold. A fluid dynamic model for road networks, according to initial car densities on roads and traffic coefficients at junctions, forecasts the future traffic evolution, giving dynamical weights to a constrained 𝐾 shortest path algorithm. Simulations are performed on a case study to test the efficiency of the proposed procedure.
Optimal Local Routing Strategies for Community Structured Time Varying Communication Networks
2017
International audience; In time varying data communication networks (TVCN), traffic congestion, system utility maximization and network performance enhancement are the prominent issues. All these issues can be resolved either by optimizing the network structure or by selecting efficient routing approaches. In this paper, we focus on the design of a time varying network model and propose an algorithm to find efficient user route in this network. Centrality plays a very important role in finding congestion free routes. Indeed, the more a node is central, the more it can be congested by the flow coming from or going to its neighborhood. For that reason, classically, routes are chosen such that…
The Impact of Internet and Social Media Use on Well-Being
2021
The present research examines the longitudinal average impact of frequency of use of Internet and social networking sites (SNS) on subjective well-being of adolescents in Germany. Based on five-wave panel data that cover a period of nine years, we disentangle between-person and within-person effects of media use on depressive symptomatology and life satisfaction as indicators of subjective well-being. Additionally, we control for confounders such as TV use, self-esteem, and satisfaction with friends. We found that frequency of Internet use in general and use of SNS in particular is not substantially related subjective well-being. The explanatory power of general Internet use or SNS use to p…
Viihtymistä, kontakteja ja hyötyä : sähköiset mediat kuudesluokkalaisen silmin
2009
Media on nykypäivänä suuri ja alati kasvava osa elämäämme, ja lapset ja nuoret ovat sen käytössä edelläkävijöitä. Tämän tutkimuksen tarkoituksena olikin selvittää, minkälaisia merkityksiä sähköisillä medioilla (tietokone/internet, elektroniset pelit, televisio ja kännykkä) on yhden kuudennen luokan oppilaille. Tutkimuksessa tarkasteltiin myös, mitä sähköisiä medioita tutkimuksessa mukana olevat lapset käyttävät ja miten. Tutkimuksessa käytettiin menetelmien ja aineistojen triangulaatiota, jolloin tutkimuksessa yhdistyivät sekä laadullinen että määrällinen tutkimus. Käytettyjä tutkimusaineistoja olivat kyselylomakkeet, mediakirjoitelmat, päiväkirjat ja posterit. Kirjoitelmia ja postereita lä…
MEDIATING ROLE OF DISSOCIATION SYMPTOMS BETWEEN ADOLESCENT COMPULSIVE INTERNET USE ACROSS TIME
2020
The aim of this study was to examine adolescent compulsive internet use (CIU) across a one-year period, to examine associations with symptoms of depression, anxiety and dissociation, as well as to analyze the potential mediating effect of dissociation symptoms. Previous studies have indicated that dissociation might serve as a coping strategy and/or as a consequence of problematic internet use. Participating in the study were 80 adolescents (39 girls and 41 boys), ages from 12 to 18 (mean age 14.90 years) at the time of the first measurement. At Time 1 and one year later at Time 2 measurement points the participants completed the Trauma Symptom Checklist (Briere, 1995) and items from the …
Internalizing problems as a mediator in the relationship between low effortful control and internet abuse in adolescence: A three-wave longitudinal s…
2019
Abstract The aim of the study is to examine the relationships between early adolescents' low effortful control, middle adolescents' internalizing problems and late adolescents' Internet abuse, focusing on the mediating role that middle adolescents' internalizing problems may play in the relationship between early adolescents' low effortful control and late adolescents' Internet abuse. The study followed a sample of 482 adolescents (245 boys and 237 girls) from early adolescence (wave 1; mean age = 14.76, SD = 0.63), through middle adolescence (wave 2; mean age = 15.77, SD = 0.61), to late adolescence (wave 3; mean age = 17.88, SD = 0.57). The participants completed self-report questionnaire…
Social stigma and self-esteem as mediators of the relationship between Body Mass Index and Internet addiction disorder. An exploratory study
2018
The present study aimed at investigating the mediational effects of social stigma and self-esteem on the relationship between Body Mass Index (BMI) and Internet addiction disorder. A total of 413 participants aged between 18 and 26 years old (M = 20.94 SD = 2.95) were assessed with self-report standardized questionnaires exploring self-esteem (i.e. Rosenberg Self-Esteem Scale - RSES), Internet addiction (i.e. Young Internet Addiction Test- YIAT), and social-stigma (i.e. Perception of Teasing Scale - POT), and with objective measures related to BMI. Results showed a partial direct association between BMI and Internet addiction. Specifically, our mediation model revealed a good fit to data sh…
Acceptance of E-Learning Devices by Dental Students
2013
Background: E-Learning programs and their corresponding devices are increasingly employed to educate dental students during their clinical training. Objective: Recent progress made in the development of e-learning software as well as in hardware (computers, tablet PCs, smartphones) caused us to more closely investigate into the habits of dental students in dealing with these learning techniques. Methods: Dental students during their clinical training attended a survey compiled in cooperation with biostatisticians. The questionnaire probands were asked to complete based on previous surveys of similar subjects, allowing single as well as multiple answers. The data, which were obtained with re…
The dialogical bricoleur? Expectations towards internet-based services in Norway and Sweden
2012
Mental health is a multifaceted concept that has been described and understood differently throughout history. The emergence of internet-based services has signalled changes in both the delivery of ...