Search results for "model."

Distribución de la humedad del suelo mediante observaciones del satétite SMOS, modelización con SURFEX y medidas in situ sobre la Valencia Anchor Sta…

2017

La humedad del suelo es una variable importante en agricultura, hidrología, meteorología y disciplinas afines. A pesar de su importancia, es complicado obtener una representación adecuada de esta variable, principalmente por su alta variabilidad temporal y espacial. Las observaciones in situ son escasas, pero los modelos SVAT (Soil-Vegetation-Atmosphere-Transfer) pueden utilizarse para simular el comportamiento temporal y la distribución espacial de la humedad del suelo en un área determinada. El objetivo principal de esta tesis es generar campos de humedad del suelo que permitan la espacialización de las medidas puntuales de las estaciones de la Valencia Anchor Station y para ello se utili…

Social engagement from childhood to middle age and the effect of childhood socio-economic status on middle age social engagement: results from the Na…

2016

ABSTRACTSocial engagement has powerful effects on wellbeing, but variation in individual engagement throughout the lifecourse is wide. The trajectories may differ by gender and be affected by socio-economic status (SES). However, long-term development of social engagement is little studied and the effect of childhood SES on later-life social engagement remains obscure. We aimed to describe the social engagement development from childhood to middle age by gender and test the effect of childhood SES on middle age social engagement. Data (N=16,440, 51.3% male) are drawn from the on-going National Child Development Study, following British babies born in 1958. Social engagement was measured by …

Reciprocal Relationships Between Perceived Supportive School Climate and Self-reported Truancy : A Longitudinal Study from Grade 6 to Grade 9

2022

This longitudinal study of 1,066 Finnish students examined bidirectional reciprocal relationships between changes in perceived supportive school climate and changes in self-reported truancy from the last year of primary school (Grade 6) to the last year of lower secondary school (Grade 9). The results of the random intercept cross-lagged panel model showed, first, that a decrease in positive perceptions of school climate at the previous time point predicted more self-reported truancy at the following time point. Second, an increase in self-reported truancy predicted less positive perceptions of supportive school climate. The study indicates that students’ perceptions of supportive school cl…

Determining Factors of High Social Connotation Crimes in the Metropolitan Region. A logistic model analysis.

2018

Resumen Las iniciativas enfocadas sólo en acciones de control policial, si bien elevan la percepción de seguridad, no actúan sobre las causas multifactoriales de un problema social dinámico y complejo. Por ende, se deben desarrollar medidas de prevención y de control, las que requieren la participación activa, sinérgica y coordinada de todos los actores involucrados en materia de seguridad pública, para disminuir los factores de riesgo que derivan en el actuar criminal. El objetivo de este trabajo es medir la incidencia de factores espaciales, temporales y elementos de contexto que caracterizan a las comunas de la Región Metropolitana de Chile (2014), en la probabilidad de ocurrencia de del…

The Impact Of Hybrid Infrastructure On Trust, Motivation And Knowledge Sharing In An Intentional Community: A Latvian Case Study

2013

The role of ICT infrastructure in enhancing innovation processes through fostering knowledge and information exchange is a controversial topic in regional science. Opposing views exist, in particular, with regard to two topics: a) the persistence of a specific role of geographical proximity in knowledge exchange processes in the age of global virtual networking; b) the capability of virtual networking to recreate the social assets of a physical community (trust, solidarity?). Existing studies primarily focus on aggregated data, rely on doubtful epistemological assumptions (e.g. the equation of information with knowledge), and neglect several epistemological principles of social cognition (e…

Social Determinants of Success: Social Media, Corporate Governance and Revenue

2019

This study examined how social media (Twitter and LinkedIn) relates to the operating revenue by investigating the effect of the use of social media by the board of directors. To tackle this question, we analyzed the mediating and moderating relationship of social media on the effect of board size in operating revenue (turnover). We studied the implications of the use of social media by the board members by using structural equation modeling (SEM). The data consisted of a random sample of 100 companies listed on the NASDAQ. The study makes two main contributions. First, it shows interesting differences in the use of social media for the operating revenue. Our results suggest that while Twitt…

Social network analysis and political phenomena: a contribution to the small world theory

2014

Network-based indices of individual and collective advising impacts in mathematics

2020

AbstractAdvising and mentoring Ph.D. students is an increasingly important aspect of the academic profession. We define and interpret a family of metrics (collectively referred to as “a-indices”) that can potentially be applied to “ranking academic advisors” using the academic genealogical records of scientists, with the emphasis on taking into account not only the number of students advised by an individual, but also subsequent academic advising records of those students. We also define and calculate the extensions of the proposed indices that account for student co-advising (referred to as “adjusted a-indices”). In addition, we extend some of the proposed metrics to ranking universities a…

PERSOC: A Unified Framework for Understanding the Dynamic Interplay of Personality and Social Relationships

2011

The interplay of personality and social relationships is as fascinating as it is complex and it pertains to a wide array of largely separate research domains. Here, we present an integrative and unified framework for analysing the complex dynamics of personality and social relationships (PERSOC). Basic principles and general processes on the individual and dyadic level are outlined to show how personality and social relationships influence each other and develop over time. PERSOC stresses the importance of social behaviours and interpersonal perceptions as mediating processes organized in social interaction units. The framework can be applied to diverse social relationships such as first en…

Determinants of social skills of students from 7 to 12 years

2015

International audience; Differences of achievement in school, traditionally studied by researchers in Education, can be analyzed in terms of skills and especially social skills. This scientific field is under construction but social skills are becoming a compulsory notion for actors of the school system and for Educational Sciences.Through a multidisciplinary approach, this article proposes to study the determinants of social skills using social and educational indicators widely borrowed into the explanation of the differences of achievement models, with associated self-image, neuroticism and relationship with school measures. Indeed, these three dimensions are involved in the socialization…