Search results for " MOTOR"

Efficient Conversion of Light to Chemical Energy : Directional, Chiral Photoswitches with Very High Quantum Yields

2020

Abstract Photochromic systems have been used to achieve a number of engineering functions such as light energy conversion, molecular motors, pumps, actuators, and sensors. Key to practical applications is a high efficiency in the conversion of light to chemical energy, a rigid structure for the transmission of force to the environment, and directed motion during isomerization. We present a novel type of photochromic system (diindane diazocines) that converts visible light with an efficiency of 18 % to chemical energy. Quantum yields are exceptionally high with >70 % for the cis–trans isomerization and 90 % for the back‐reaction and thus higher than the biochemical system rhodopsin (64 %). T…

Electrochemical Synthesis of an Organic Thermoelectric Power Generator.

2020

[EN] Energy harvesting through residual heat is considered one of the most promising ways to power wearable devices. In this work, thermoelectric textiles were prepared by coating the fabrics, first with multiple-wall carbon nanotubes (MWCNTs) by using the layer-by-layer technique and second with poly(3,4-ethylenedioxythiophene) (PEDOT) deposited by electrochemical polymerization. Sodium deoxycholate and poly(diallyldimethylammonium chloride) were used as stabilizers to prepare the aqueous dispersions of MWCNTs. The electrochemical deposition of PEDOT on the MWCNT-coated fabric was carried out in a three-electrode electrochemical cell. The polymerization of PEDOT on the fabric increased the…

A pratical suggestion for prevention commotio cordis

2005

Combining Numerical Relational and Fundamental Motor Skills to Improve Preschoolers’ Early Numeracy : A Pilot Intervention Study

2022

The aim of this pilot study was to examine the immediate and long-term effects of an intervention program that aims to improve preschoolers' (Le but de cette étude pilote était d'examiner les effets immédiats et à long terme d'un programme d'intervention qui vise à améliorer les compétences précoces en numératie des enfants d'âge préscolaire (N = 36, M = 4.49 ans, SD = 0.35) en combinant l'apprentissage des compétences par la lecture d'histoires avec la pratique des habiletés motrices fondamentales. Le programme d'intervention a été piloté avec deux plans d'étude : un plan à mesures répétées intra-sujet avec 18 enfants (étude I) et un plan d'étude quasiexpérimental avec 18 enfants (étude II…

Desarrollo de un paradigma de enriquecimiento ambiental y su potenciación mediante agonistas nicotínicos: efectos conductuales en ratones

2014

El paradigma del enriquecimiento ambiental (EE) en roedores se basa en proporcionar elevada estimulación cognitiva, física y social mediante diferentes procedimientos (generalmente un número elevado de animales que se mantienen en cajas grandes que contienen ruedas de actividad, túneles y diferentes tipos de juguetes). El principal objetivo de la presente Tesis Doctoral fue el desarrollo de un modelo de EE y la evaluación de sus efectos conductuales y fisiológicos en ratones con el fin de valorar si dicha manipulación contribuye a prevenir y/o revertir algunos de los efectos adversos que se observan asociados a factores como la edad o la exposición crónica situaciones de estrés social. Adem…

Study of the evolution of terminal differentiation programs using C. elegans serotonergic neurons as a model

2019

Tesis, 407 páginas, figuras y tablas.

Optimization of Delayed-State Kalman-Filter-based Algorithm via Differential Evolution for Sensorless Control of Induction Motors

2010

This paper proposes the employment of the differential evolution (DE) to offline optimize the covariance matrices of a new reduced delayed-state Kalman-filter (DSKF)-based algorithm which estimates the stator-flux linkage components, in the stationary reference frame, to realize sensorless control of induction motors (IMs). The DSKF-based algorithm uses the derivatives of the stator-flux components as mathematical model and the stator-voltage equations as observation model so that only a vector of four variables has to be offline optimized. Numerical results, carried out using a low-speed training test, show that the proposed DE-based approach is very promising and clearly outperforms a cla…

Relationship between maxinal lipid oxidation and oxygen uptake in sedentary patients with type 2 diabetes

2011

Single joint exercises do not provide benefits in performance and anthropometric changes in recreational bodybuilders

2020

The purpose of the present study was to compare the changes in anthropometric measures and muscle performance in users and non-users of androgenic anabolic steroids (AAS) performing resistance training (RT) programmes involving only multiple joint (MJ) exercises or a combination of MJ and single joint (SJ) exercises. Thirty recreational bodybuilders were divided into 4 groups: non-AAS users performing only MJ exercises (MJ), non-AAS users performing MJ + SJ (MJ + SJ), AAS users performing only MJ exercises (AAS − MJ) and AAS users performing MJ + SJ exercises (AAS − MJ + SJ). Before and after 8 weeks of training, the participants were tested for 10 repetition maximum (10RM) in different RT …

Numerical and Experimental Study of Friction Loss in Hydrostatic Motor

2012

Published version of an article in the journal: Modeling, Identification and Control. Also available from the publisher at: http://dx.doi.org/10.4173/mic.2012.3.2 Open access This paper presents a numerical and experimental study of the losses in a hydrostatic motor principle. The motor is designed so that the structural deflections and lubricating regimes between moving surfaces and, subsequently, the leakage and friction losses, can be controlled during operation. This is done by means of additional pressure volumes that influence the stator deflection. These pressures are referred to as compensation pressures and the main emphasis is on friction or torque loss modeling of the motor as a …