Search results for " method"

Psychometric properties and validation of the sexual sensation seeking scale in Spanish adolescents: Brief screening method for use in research and c…

2018

Abstract Sexual sensation seeking among adolescents has been mostly associated with unprotected sex and other risky behaviors. This paper presents the Spanish adaptation and validation of the Sexual Sensation Seeking Scale (SSSS). This cross-sectional study included 1350 adolescents (601 male and 749 female), aged between 15 and 18 years ( M  = 16.1, SD  = 0.97). Exploratory Factor Analysis (EFA) yielded two components: Physical Sensations Attraction (PSA), and New Experiences Seeking (NES), which together accounted for 48.98% of the total variance. That structure was later verified through Confirmatory Factor Analysis (CFA). Internal consistency was 0.82 for the total scale, and 0.76 and 0…

An Internet-based treatment for flying phobia (NO-FEAR Airlines): study protocol for a randomized controlled trial

2016

Background: Flying phobia (FP) is a common and disabling mental disorder. Although in vivo exposure is the treatment of choice, it is linked to a number of limitations in its implementation. Particularly important, is the limited access to the feared stimulus (i.e., plane). Moreover, the economic cost of in vivo exposure should be specially considered as well as the difficulty of applying the exposure technique in an appropriate way; controlling important variables such as the duration of the exposure or the number of sessions. ICTs could help to reduce these limitations. Computer-assisted treatments have remarkable advantages in treating FP. Furthermore, they can be delivered through the I…

Traffic Flow Variables Estimation: An Automated Procedure Based on Moving Observer Method. Potential Application for Autonomous Vehicles

2019

Abstract The estimation of traffic flow variables (flow, space mean speed and density) plays a fundamental role in highways planning and designing, as well as in traffic control strategies. Moving Observer Method (MOM) allows traffic surveys in a road, or in a road network. This paper proposes a novel automated procedure, called MOM-AP based on Moving Observer Method and Digital Image Processing (DIP) Technique able to automatically detect (without human observers) and calculate flow q, space mean speed vs and density k in case of stationary and homogeneous traffic conditions. In order to evaluate how reliable is the MOM-AP, an experiment has been carried out in a segment of one two-lane si…

A more efficient cutting planes approach for the green vehicle routing problem with capacitated alternative fuel stations

2021

AbstractThe Green Vehicle Routing Problem with Capacitated Alternative Fuel Stations assumes that, at each station, the number of vehicles simultaneously refueling cannot exceed the number of available pumps. The state-of-the-art solution method, based on the generation of all feasible non-dominated paths, performs well only with up to 2 pumps. In fact, it needs cloning the paths between every pair of pumps. To overcome this issue, in this paper, we propose new path-based MILP models without cloning paths, for both the scenario with private stations (i.e., owned by the fleet manager) and that with public stations. Then, a more efficient cutting plane approach is designed for addressing both…

Web based survey to measuring social interactions, values, attitudes and travel behavior

2018

Abstract This paper presents the data collection methodology developed for Minerva research project. The aim of Minerva is to study the influence of values, attitudes and social interactions on travel behavior. For this purpose, a web based survey has been developed, which consists of several questionnaires to collect respondents’ values and attitudes; a two-day activity-travel diary; information about social interactions; and socio-demographic characteristics. To identify the social contacts, it is being used a contact diary methodology together with the activity-travel diary.

Critical realism and ICT4D: editorial introduction to the special issue of EJISDC

2018

Superación de errores conceptuales del equilibrio químico mediante una metodología basada en el empleo exclusivo de la constante de equilibrio

2018

<span>A partir del trabajo iniciado por Driscoll (1960), un gran número de investigadores han intentado conocer cuáles son las dificultades y errores conceptuales relacionados con el equilibrio químico. Algunas de estas investigaciones han tratado, además, establecer su posible origen. Entre otras causas, se han señalado las siguientes...</span>

Una formulación sencilla, cuantitativa y precisa para el principio de Le Chatelier

2018

<span>El principio de Le Chatelier goza de una amplia popularidad en la enseñanza del equilibrio químico (Quílez et al., 1993). Sin embargo, existen numerosas situaciones en las que se encuentra limitado (Quílez y Solaz, 1994; Solaz y Quílez, 1995) y posee dificultades insuperables en cuanto a su formulación como regla cualitativa precisa y sencilla (Quílez, 1995a).</span>

1, 2, 3, 4, 5 . . . 43: Justice! Ay! Ay! Ayotzinapa

2015

Les apports du modèle de recherches d'expériences à l'analyse du comportement dans le domaine culturel Une exploration conceptuelle et méthodologique

1995

International audience; Le modèle de recherche d'expériences de Holbrook et Hirschman a été présenté par ses auteurs comme un cadre conceptuel bien adapté à l'analyse des comportements dans le domaine culturel. Cette recherche analyse la capacité de variables explicatives des différences interindividuelles retenues par ce modèle à expliquer des différences dans les évocations affectives du théâtre par le public. La méthodologie mise en œuvre s'appuie sur l'analyse statistique de données textuelles recueillies auprès des différents segments de spectateurs.