Estado actual de la técnica y cuestiones perdurables en la recogida de datos antropométricos

The study of human body size and shape has been a topic of research for a very long time. In the past, anthropometry used traditional measuring techniques to record the dimensions of the human body and reported variance in body dimensions as a function of mean and standard deviation. Nowadays, the study of human body dimensions can be carried out more efficiently using three-dimensional body scanners, which can provide large amounts of anthropometric data more quickly than traditional techniques can. This paper presents a description of the broad range of issues related to the collection of anthropometric data using three-dimensional body scanners, including the different types of technologies available and their implications, the standard scanning process needed for effective data collection, and the possible sources of measurement errors that might affect the reliability and validity of the data collected.El estudio del tamaño y la forma del cuerpo humano ha sido un tema de investigación durante un tiempo muy largo. En el pasado, la antropometría utilizó técnicas de medición tradicionales para registrar las dimensiones del cuerpo humano y reportó la variación en las dimensiones del cuerpo en función de la media y la desviación estándar. Hoy en día, el estudio de las dimensiones del cuerpo humano se puede llevar a cabo utilizando maneras más eficientes, como los escáneres tridimensionales del cuerpo, que pueden proporcionar grandes cantidades de datos antropométricos más rápidamente que las técnicas tradicionales. En este trabajo se presenta una descripción de la amplia gama de temas relacionados con la recogida de datos antropométricos utilizando escáneres tridimensionales del cuerpo, incluyendo los diferentes tipos de tecnologías disponibles y sus implicaciones, el proceso de digitalización estándar necesario para la captura efectiva de datos, y las posibles fuentes de los errores de medición que podrán afectar la fiabilidad y validez de los datos recogidos.This work is financed by FEDER funds through the Competitive Factors Operational Program (COMPETE) POCI-01-0145-FEDER-007043 and POCI-01-0145FEDER-007136 and by national funds through FCT – the Portuguese Foundation for Science and Technology, under the projects UID/CEC/00319/2013 and UID/CTM/00264 respectively

A validation study of a Kinect based Body Imaging (KBI) device system based on ISO 20685:2010

To replace the traditional anthropometric data collection processes with the 3D acquiring system it is important that the validity of the data is not compromised. To do this, a validation study, based on the guideline of ISO 20685, can be performed. This paper presents the results of a comparison between traditional measurements and measurements taken with a 3D acquiring system using only four Kinect sensors. The results obtained were then compared with the maximum allowable error indicated in ISO 20685, concluding that this system cannot give sufficiently reliable data that can substitute the manual procedures.FEDER funds through the Competitive Factors Operational Program (COMPETE) and by national funds through FCT (Portuguese Foundation for Science and Technology) with the projects PEst- C/CTM/U10264 and ID/CEC/00319/201

Stratified scalar field theories of gravitation with self-energy term and effective particle Lagrangian

We construct a general stratified scalar theory of gravitation from a field equation that accounts for the self-interaction of the field and a particle Lagrangian, and calculate its post-Newtonian parameters. Using this general framework, we analyze several specific scalar theories of gravitation and check their predictions for the solar system post-Newtonian effects.Comment: 12 page

Evaluation of design recommendations for the development of wheelchair rugby sports-wear

Currently, wheelchair rugby athletes face the challenges of playing the sport without specifically designed sports-wear kit. A few designs and recommendations have already been proposed by researchers but none have made it to market yet. The purpose of this study was to evaluate a set of design recommendations for the development of wheelchair rugby sports-wear. This was done so that the products to be created are developed in collaboration with their potential users, responding to their particular needs and requirements. The evaluation was done through an online survey, where the athletes were presented with a visual representation of the design recommendations. The results indicate that the people questioned agree with the majority of the proposed designs and would be happy to have these improvements made to their current sports-wear. The most criticised recommendations were for the gloves, as they are the most important part of the kit, so it is important that they are adequate and allow for a good performance

Dinâmica de nutrientes e atributos químicos do perfil do solo em resposta à aplicação de calcário na cultura de guaranazeiro em formação no município de Maués, Estado do Amazonas.

Com os objetivos de avaliar os efeitos do calcário sobre a dinâmica de nutrientes e atributos químicos do perfil do solo de uma cultura de guaranazeiro em formação, foram utilizados quatro níveis de calcário. O trabalho foi conduzido na Fazenda Santa Helena, situada no município de Maués/AM sobre Latossolo Amarelo Distrófico

Pollen quality, meiotic abnormalities and poliploidy inSisyrinchium commutatum (Iridaceae)

O comportamento meiótico de Sisyrinchium commutatum (Iridaceae) foi avaliado e associado com as altas taxas de inviabilidae polínica observada em uma população do sudeste do Brasil. Além disso, pela primeira vez, descreve-se o número cromossômico desta espécie, contribuindo assim para a sistemática do grupo. Alguns aspectos da biologia floral são relatados , como a ocorrência de apresentação secundária de pólen e a ausência de autopolinização espontânea e apomixia para esta espécie. Os resultados do presente trabalho confirmam a ação das anormalidades meióticas como possível mecanismo disruptivo na formação de grãos-de-pólen com consequências ao sucesso reprodutivo na população estudada .The meiotic behaviour of Sisyrinchium commutatum (Iridaceae) was studied and associated to the pollen quality observed in a southeastern population in Brazil. For the first time, the chromosome number is reported for this species (2n = 36). Some traits of floral biology were recorded and secondary pollen presentation as well as the absence of autonomous self-fertilization and apomixy were observed. The results of this study confirm the abnormalities in the meiosis process breaking the pollen grain formation with consequences to reproductive success in the studied population.Fil: Avila Jr., Rubem Samuel de. Universidade Federal do Pampa; BrasilFil: Urdampilleta, Juan Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; ArgentinaFil: Gil, A. S. Bragança. Museu Paraense Emílio Goeldi; Argentin

Food demand in Brazil: an application of Shonkwiler & Yen Two-Step estimation method

O objetivo deste artigo é analisar a demanda de alimentos no Brasil por meio da estimação de um sistema de demanda com dezoito produtos usando dados da Pesquisa de Orçamentos Familiares realizada em 2002 e 2003 (POF 2002/2003). A forma funcional utilizada foi o Quadratic Almost Ideal Demand System (QUAIDS). A estimação utiliza o Procedimento de Shonkwiler e Yen para lidar com o problema do consumo zero. Os resultados mostraram que as probabilidades de aquisição dos produtos básicos foram negativamente relacionadas com a renda familiar mensal, enquanto carnes, leite e outros produtos mostraram uma relação positiva. As variáveis de educação, regionais e de localização do domicílio também foram importantes no primeiro estágio da estimação. Em relação às elasticidades-renda, nenhum bem foi considerado inferior e seis de dezoito foram considerados bens de luxo.The objective of the analysis is to estimate a demand system including eighteen food products using data from a Brazilian Household Budget Survey carried out in 2002 and 2003 (POF 2002/2003). The functional form used was Quadratic Almost Ideal Demand System (QUAIDS). Estimation employs the Shonkwiler and Yen method to account for zero consumption. Results showed that purchase probabilities of staples foods were negatively related to family monthly income, while meat, milk and other products showed a positive relation. Regional, educational and urbanization variables were also important in the first stage estimation. While some of the goods had negative income coefficients, none were inferior and six of eighteen were luxuries based on second stage estimates

Dinâmica de nutrientes e atributos químicos do perfil do solo em função da aplicação de gesso agrícola na cultura de guaranazeiro em formação no Estado do Amazonas.

O objetivo desse trabalho foi avaliar os efeitos do gesso agrícola sobre a distribuição e os teores de nutrientes das camadas do solo, bem como sobre os atributos químicos determinados nas análises de rotina