Human action perception is so powerful that people can identify movement efficiently in the absence of pictorial information, such as in point-light displays. Interest is growing in this type of stimulus for research in neuroscience. This interest stems from the advantage of separating the component of pure human action kinematics from other pictorial information, such as facial expression and muscle contraction. Although several groups have previously developed datasets of human point-light actions, due to the lack of datasets composed of daily actions with short durations, we developed 20 biological and 40 control (scrambled) point-light movements by using the technique of recording people wearing reflector patches. The videos are about 1 s long. Subsequently, we performed a judgment task in which 100 participants (50 male and 50 female) evaluated each video according to three categories: human action resemblance, performed action, and gender of actor. We present the mean scores of each evaluation for each video, and further propose a selection of the most suitable videos to be used as human point-light action displays and scrambled point-light displays for control. Finally, we discuss our findings on the gender attributions of the pointlight displays.
RESUMO:O artigo tem como objetivo analisar a produção dos primeiros censos populacionais nacionais desenvolvidos no Brasil nos anos de 1872, 1890 e 1990. Busca-se apreender a construção de categorias demográfi cas na homogeneização/segmentação das diferentes populações. Tendo como referência os dados da província/estado do Mato Grosso, tem-se em vista apreender a produção e deslocamento de categorias demográfi cas, contemplando os dados sobre composição racial e de instrução. Observa-se que as categorias demográfi cas, mais que organização de dados objetivos, constituem construções sócio-históricas.
Palavras-chave:Censos. Categorias demografi as. Brasil. Século XIX.Brazilian portrait: race and instruction in demographic census of nineteen century ABSTRACT: The aim of this paper is to discuss the production of the fi rst national census of Brazilian population, during the second half of nineteen century (1872, 1890 and 1990). In order to understand the construction of demographical categories to defi ne and segment the population, we put focus on the data from Mato Grosso province/state. In this sense, we analyze the production and changes on two categories: racial composition and instruction, trying to show that demographic categories, more than an objective data constitutes a social and historical construction
This data paper contains data related to a reproducibility test for running pacing strategy in an intermittent running test until exhaustion. Ten participants underwent a crossover study (test and retest) with an intermittent running test. The test was composed of three-minute sets (at 1 km/h above Onset Blood Lactate Accumulation) until volitional exhaustion. To assess pace strategy change, in the first test participants chose the rest time interval (RTI) between sets (ranging from 30 to 60 s) and in the second test the maximum RTI values were either the RTI chosen in the first test (maximum RTI value), or less if desired. To verify the reproducibility of the test, rating perceived exertion (RPE), heart rate (HR) and blood plasma lactate concentration ([La]p) were collected at rest, immediately after each set and at the end of the tests. As results, RTI, RPE, HR, [La]p and time to exhaustion were not statistically different (p>0.05) between test and retest, as well as they demonstrated good intraclass correlation.
The purpose of this study was to present a 3D interactive environment-a Digital Platform to help in fencing training. The first fencing motion described and analysed at the 3D platform was lunge in epee fencing. The platform was able to show kinematic variables of upper and lower limbs and the center of mass that characterized a good performance in epee fencing. The platform also incorporates a digital database of eye track motions of the fencers. An OptiTrack motion capture system was used to capture the lunge motion of five skilled amateur fencing athletes in the presence or not of a static opponent and an Eye Track System Tobbi II was used to track the eye movements of the fencers when performing a lunge attack with a target. The 3D platform was developed using Unity3D and can present some interesting results to improve available information to coaches. That highlights the importance of visualization biomechanical results based on coach criteria in a more understandable way to help athletic training.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.