Search results for "ergonomics"
showing 10 items of 626 documents
Human Activity Recognition Process Using 3-D Posture Data
2015
In this paper, we present a method for recognizing human activities using information sensed by an RGB-D camera, namely the Microsoft Kinect. Our approach is based on the estimation of some relevant joints of the human body by means of the Kinect; three different machine learning techniques, i.e., K-means clustering, support vector machines, and hidden Markov models, are combined to detect the postures involved while performing an activity, to classify them, and to model each activity as a spatiotemporal evolution of known postures. Experiments were performed on Kinect Activity Recognition Dataset, a new dataset, and on CAD-60, a public dataset. Experimental results show that our solution o…
An Evaluation of HCI and CMC in Information Systems within Highly Crowded Large Events
2013
Pervasive systems are composed of a large variety of networked smart devices that supposedly enrich the environment they are deployed in. The access to services provided by a pervasive system should be as natural and “unconscious” as possible. In a large number of cases, the available interaction modality seems to be more oriented towards showing off technological wonders rather than to the actual usability of the interface. In this paper we evaluate and compare two different versions of an information provision system deployed in two editions of a large fair. In particular, we will focus on the Human-Computer Interaction (HCI) and Computer-Mediated-Communication (CMC) points of view. The a…
Early pastoral communities in the mountains of Sicily. Prehistoric evidence from Vallone Inferno (Scillato) in the palaeoenvironmental framework of t…
2021
Abstract This paper discusses the Middle Neolithic and the Early Bronze Age phases of the occupation of a rock shelter at Vallone Inferno (Scillato, Palermo) in Sicily. Vallone Inferno is a key site for studying the early establishment and development of pastoralism in the prehistoric mountainous environments of Sicily. Seasonal use of the site as a shelter is documented for the earliest pastoral communities that exploited the Madonie mountain range. The results of the analysis of pottery and lithic assemblages contribute to the definition of two chronocultural frameworks that were linked by the same economic subsistence base. The special role of obsidian emerges, while the mobility pattern…
Cognitive vulnerability to depressive symptoms in children: the protective role of self-efficacy beliefs in a multi-wave longitudinal study.
2014
The current multi-wave longitudinal study on childhood examined the role that social and academic self-efficacy beliefs and cognitive vulnerabilities play in predicting depressive symptoms in response to elevations in idiographic stressors. Children (N = 554; males: 51.4 %) attending second and third grade completed measures of depressive symptoms, negative cognitive styles, negative life events, and academic and social self-efficacy beliefs at four time-points over 6 months. Results showed that high levels of academic and social self-efficacy beliefs predicted lower levels of depressive symptoms, whereas negative cognitive styles about consequences predicted higher depression. Furthermore,…
The Reciprocal Influences among Motivation, Personality Traits, and Game Habits for Playing Pokémon GO
2018
This article reports a study exploring motivations of Pokémon Game use, individual differences related to personality traits, and game habits. First, it analyzed Pokémon GO motivations through exploratory factor analysis (EFA) by administering online the Pokémon GO Motivational Scale to a group of Italian gamers (N = 560). Successively, a Confirmatory Factor Analysis (CFA) was conducted testing three factorial models of Pokémon Game motivations on a selected random sample (N = 310). Results showed a three-factor model of Pokémon GO Game motivations (i.e. Personal Needs, Social Needs and Recreation), accounting for 68.9% of total variance plus a general higher order factor that best fits the…
Media use during adolescence: the recommendations of the Italian Pediatric Society
2019
Abstract Background The use of media device, such as smartphone and tablet, is currently increasing, especially among the youngest. Adolescents spend more and more time with their smartphones consulting social media, mainly Facebook, Instagram and Twitter because. Adolescents often feel the necessity to use a media device as a means to construct a social identity and express themselves. For some children, smartphone ownership starts even sooner as young as 7 yrs, according to internet safety experts. Material and methods We analyzed the evidence on media use and its consequences in adolescence. Results In literature, smartphones and tablets use may negatively influences the psychophysical d…
L’impact du leadership participatif sur la réduction de l’incertitude et la satisfaction des besoins psychologiques des conseillers de Pôle Emploi
2021
Resume Cette etude examine dans quelle mesure l’impact du leadership participatif sur les emotions et sur la satisfaction des besoins psychologiques est mediatise par une reduction de l’incertitude chez les collaborateurs. Parmi les conseillers a Pole Emploi, 108 ont ete interroges sur leurs perceptions de leadership, leurs incertitudes (i.e. ambiguite de role, besoin de cloture) et sur des indicateurs d’un fonctionnement psychologique satisfaisant au travail (i.e. emotions et satisfaction/frustration des besoins). Les resultats revelent que seul un leadership participatif est associe positivement a nos indicateurs de fonctionnement psychologique au travail et que cette relation est mediati…
Stress conceptions in life event research: Towards a person‐centred perspective
1987
The present article focuses on a discussion of the theoretical foundations of life event research. Since critical life events are usually regarded as stressful events, the main question is which concepts of stress are employed in different life event approaches and what is their rationale. The discussion centres on two topics that have to be treated independently: the question of specificity vs nonspecificity and the question of individualized vs normative weightings. It is shown that different life event approaches rely on different concepts of stress. Numerous objections lead to a rejection of the nonspecificity concept and a normative proceeding. However, even when a specificity view of…
Qualité des débats sur le travail : la confiance en question
2019
Resume L’Accord national interprofessionnel de 2013 sur la qualite de vie au travail affiche une volonte d’instituer des espaces de discussion permettant aux salaries de s’exprimer sur la qualite de leur travail. Cela interroge les modalites de la discussion pour ceux qui l’initient comme pour ceux qui y participent, la confiance semblant etre incontournable pour permettre de se devoiler et debattre. Les auteures proposent de franchir un pas supplementaire a partir de l’analyse d’une controverse professionnelle en identifiant la necessite de partager des presupposes communs entre pairs pour developper les debats.
Dynamique des valeurs culturelles au travail en contexte gabonais : influence de la culture nationale et de la culture d’entreprise occidentale
2021
Resume Davantage d’entreprises occidentales s’implantent en Afrique en y appliquant la culture d’entreprise de leur maison-mere, qui contraste avec la culture nationale locale. La presente recherche examine les liens directs et interactifs de ces deux dimensions culturelles sur les valeurs culturelles au travail, telles que le collectivisme et la distance au pouvoir. Un total de 650 salaries gabonais travaillant au sein d’entreprises occidentales ont repondu a un questionnaire. Selon les resultats, la culture nationale gabonaise et la culture d’entreprise occidentale entretiennent des relations contraires avec le collectivisme au travail. Ils revelent un effet additif des deux cultures sur …