Search results for "problems"
showing 10 items of 620 documents
Arc routing problems with drones
2023
La tecnología emergente de vehículos aéreos no tripulados, comúnmente conocidos como drones, ha brindado nuevas oportunidades para los profesionales de la logística urbana en la última década. El transporte ha jugado siempre un papel crucial en la sociedad y en la economía, y un motor fundamental del desarrollo económico en los últimos tiempos ha sido la inversión en sistemas de transporte cada vez más eficientes. Los drones presentan ventajas atractivas en comparación con los vehículos terrestres estándar, como evitar la congestión en las redes viales, eliminar el riesgo del personal en operaciones de difícil acceso u obtener una mayor precisión de medición en la inspección de infraestruct…
Dziecko ryzyka dysleksji w szkolnej rzeczywistości
2014
Adolescents’ and mothers’ temperament types and their roles in early adolescents’ socioemotional functioning
2018
The present study examined adolescents’ and mothers’ temperament types and their roles in the socioemotional functioning of early adolescents. A total of 869 sixth-grade students and 668 mothers participated in the study. The students rated their temperament and socioemotional functioning and the mothers rated their own temperament. Latent profile analyses identified four temperament types among the adolescents (resilient, reserved, average, and mixed) and three types among the mothers (resilient, average, and mixed). The results showed that the adolescents with resilient or reserved temperaments reported significantly fewer conduct problems and emotional symptoms, less hyperactivity, and …
La economía social: concepto, macromagnitudes y yacimiento de empleo para el Trabajo Social
2013
La economía social, el Tercer Sector de las economías situado entre el sector público y el sector privado tradicional, se encuentra en plena expansión en las dos últimas décadas, al calor de las grandes transformaciones sociales, económicas y de actuación de los poderes públicos. Tres son los objetivos de este artículo: en primer lugar, delimitar conceptualmente el campo de la economía social, recogiendo sus características estructurales e identificando entre sus actores principales a: las cooperativas, las mutualidades, las asociaciones con actividad económica, las fundaciones y ciertas entidades singulares como la ONCE. En segundo lugar, tras la precisa delimitación anterior, busca ofrece…
Family networks and refugees’ health conditions. A picture from Italian informal settlements
2021
While the relationships between social networks and health are widely acknowledged in the literature, few of these studies have covered the population of refugees living in makeshift camps. In our analysis of a nationally representative Italian survey of individuals living in informal settlements, we find that many had weak family relations: only 10 per cent had one or more family members in their settlement. The paper analyses the effects of individual social network on two measures of health, and finds that the refugees’ health conditions were associated with both their personal characteristics and the characteristics of the settlement. The results show that more than 50 per cent of these…
A Study of the Health of Seafaring Workers of Valencia, Spain
1997
Under the auspices of the Service of Maritime Health of the Marine Social Institute of Valencia, Spain, the health status of seafaring workers from Valencia was evaluated. An epidemiologic study was carried out based on 707 pre-embarkation health examinations, collecting information about the health problems of these workers and their associated risk factors. The data were analyzed to estimate population frequencies and the corresponding 95% confidence intervals. Significance among groups was calculated by the chi-square test (p0.05). Relative risks were calculated in comparisons of the seafaring workers with the general population of Valencia. High incidences of ophthalmologic disorders we…
Diferencias de género entre autocultivadores de cannabis en España
2019
The increase in cannabis use coincides with the proliferation of small-scale cannabis cultivation. These crops facilitate substance availability and increased use. Some investigations have studied the characteristics of small-scale cultivators; however, it is not known whether their profiles differ by gender. The aim of the present study was to analyse differences among growers regarding sociodemographic variables, patterns of use and health problems from a gender perspective. A descriptive observational study was designed with a sample of 219 cultivators (157 men and 62 women), aged between 18 and 34. Problematic use of cannabis (CPQ), cannabis dependence (SDS), patterns of abuse (CAST), r…
"Kun siihen pystyy kuitenkin, ei oo mitään järkee olla tekemättä." : oppimisen vaikeudet pianonsoiton opiskelussa - oppilaiden kokemuksia ja opetukse…
2018
Between a rock and a hard place : middle managers' ethical decision making and behaviour in the organisational context
2018
This study increases knowledge and understanding of middle managers’ ethical decision-making and behaviour within the context of Finnish higher education. The aim of the research is to develop a new framework for ethical decision-making and behaviour by combining prior theories and empirical knowledge. This dissertation consists of an introductory essay and three articles. The main argument of this research is that through organisations’ socialisation processes, middle managers adopt socially defined managerial roles, which affect their ethical decision-making and ethical conduct. We can say that especially the ethical organisational culture is significant for middle managers’ understanding…
A posteriori error identities for nonlinear variational problems
2015
A posteriori error estimation methods are usually developed in the context of upper and lower bounds of errors. In this paper, we are concerned with a posteriori analysis in terms of identities, i.e., we deduce error relations, which holds as equalities. We discuss a general form of error identities for a wide class of convex variational problems. The left hand sides of these identities can be considered as certain measures of errors (expressed in terms of primal/dual solutions and respective approximations) while the right hand sides contain only known approximations. Finally, we consider several examples and show that in some simple cases these identities lead to generalized forms of the …