Search results for "TASK"

An AMI System for User Daily Routine Recognition and Prediction

2014

Ambient Intelligence (AmI) defines a scenario involving people living in a smart environment enriched by pervasive sensory devices with the goal of assisting them in a proactive way to satisfy their needs. In a home scenario, an AmI system controls the environment according to a user’s lifestyle and daily routine. To achieve this goal, one fundamental task is to recognize the user’s activities in order to generate his daily activities profile. In this chapter, we present a simple AMI system for a home scenario to recognize and predict users’ activities. With this predictive capability, it is possible to anticipate their actions and improve their quality of life. Our approach uses a Hidden M…

Fitted dosimetric parameters of high dose-rate 192Ir sources according to the AAPM TG43 formalism

2001

The purpose of this study is to find fitted functional forms to the anisotropy function, F(r,θ), and the radial dose function, g(r), in order to characterize dose-rate distributions around all the high-intensity 192 Ir sources currently in use. Dosimetry data are at present available as tables for: the microSelectron HDR (“classic” and “new” design models), the PDR source, and the VariSource HDR source, expressed in terms of the AAPM Task Group No. 43 recommendations. There is only one paper out which introduces a functional form to fit the anisotropy function, but only for symmetric sources with respect to the transverse axis. However, dosimetric data of the HDR and PDR sources mentioned a…

ESTIMATION OF RATES OF RETURN TO INVESTMENTS IN EDUCATION IN LATVIA

2021

The aim of the article is to prove the positive impact of education on work salary. For this purpose, the main task of the article is toestimate the Mincer rate of return by taking several factors into account. A secondary task of the research is to analyze the results of2010 and 2011 and to find explanations for the significant differences between the two years. The results of research and a detailedanalysis of the labour market indicate a positive return from attainment of education at an individual level, and they strengthen thehypothesis about a correlation among higher education attainment, higher employment levels and welfare. So far, the Mincer rate ofreturn has not been widely used …

Approximation algorithm for constrained coupled-tasks scheduling problem

2014

International audience; We tackle the makespan minimization coupled-tasks problem in presence of compatibility constraints. In particular, we focus on stretched coupled-tasks, i.e. coupled-tasks having the same sub-tasks execution time and idle time duration. In such context, we propose some complexity results according to several parameters and we design an efficient polynomial-time approximation algorithm.

2015

It has been shown that the mental fatigue induced by prolonged self-regulation increases perception of effort and reduces performance during subsequent endurance exercise. However, the physiological mechanisms underlying these negative effects of mental fatigue are unclear. The primary aim of this study was to test the hypothesis that mental fatigue exacerbates central fatigue induced by whole-body endurance exercise. Twelve subjects performed 30 min of either an incongruent Stroop task to induce a condition of mental fatigue or a congruent Stroop task (control condition) in a random and counterbalanced order. Both cognitive tasks (CTs) were followed by a whole-body endurance task (ET) cons…

Autonomic Stress Response and Perceived Effort Jointly Inform on Dual Tasking in Aging

2019

The study investigated, through neuroendocrinological, subjective and behavioral assessments, how aging individuals cope with locomotor-cognitive dual-tasking and whether physical activity habits influence the acute response to locomotor-cognitive performance. Seventy-nine healthy participants aged 55&ndash

Reading, Gender, and Engagement : Lessons From Five PISA Countries

2014

The authors, members of the PISA/PIRLS Task Force, provide a summary of major gender differences in performance found overall on PISA 2009, along with relevant trends since 2000. The five countries represented by the authors are highlighted in this summary, which includes findings related to the interaction of engagement and reading literacy achievement by gender. These data are foregrounded from PISA because they add further evidence of a serious global pattern of boys’ underachievement in reading and lower reading engagement relative to girls. This is followed by a discussion of what each of our five countries has done in response to the gender gap in reading literacy. The article conclud…

Cross‐lagged associations between kindergarten teachers' causal attributions and children's task motivation and performance in reading

2009

The present study investigated whether kindergarten teachers' causal attributions would predict children's reading‐related task motivation and performance, or whether it is rather children's motivation and performance that contribute to teachers' causal attributions. To investigate this, 69 children (five to six years old at baseline) and their teachers were examined twice during the kindergarten year. Teachers filled in a questionnaire measuring their causal attributions twice during the kindergarten year. Information about the children's reading‐related task motivation and performance was gathered at the beginning of and at the end of the kindergarten year. The results showed that the hig…

Are decisions in a real choice experiment consistent with reservation prices elicited with BDM 'auction'? The case of French baguettes

2014

Abstract The aim of this study was to compare consumer choices observed in a real choice experiment and their reservation prices elicited with the BDM mechanism in order to assess the rationality of participant behaviors. One hundred and seventy-seven participants tested four French baguettes in each task. For the real choice experiment, participants were faced with 17 scenarios (17 × 4 baguette-price combinations). In each method, participants could select a “no purchase” option. Comparing choices and reservation prices made it possible to assess the rationality of participant behaviors. From a strict economic standpoint, 50% of observed choices were fully rational. When one baguette was a…

Layout attributes and recall

2003

The spatial arrangement of elements such as icons in a computer interface may influence learning the interface. However, the effects of layout organization on users' information processing is relatively little studied so far. The three experiments of this paper examined two attributes of layouts: spatial grouping by proximity and semantic coherence. Learning was assessed by tasks in which 30 participants recalled icon-like items' labels, locations, or both as a series of study-recall trials. The results show that layout organization interacts with task demands. Semantic organization improves recall of labels, and spatial grouping supports recall of locations. When both labels and locations …