Time Constraints
Mostrando 25-36 de 355 artigos, teses e dissertações.
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25. Continuing education of physical education teachers and self-assessment of the teaching domain
Abstract AIMS to diagnose continuing education initiatives and training needs of physical education teachers. The frequency, limitations and alternatives to continuing education were characterized and self-assessment areas of knowledge essential to teaching were analyzed. METHODS Data were obtained from 18 beginning teachers, using the Professional Career
Motriz: rev. educ. fis.. Publicado em: 21/12/2017
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26. A novel transition identification mechanism for the diesel blending and distribution scheduling problem using the discrete time representation with two time-scales granularity
ABSTRACT Transitions between tasks arise in many different scheduling problems. Sometimes transitions are undesired because they incur costs; sometimes they are undesired because they require setup time, and sometimes both. In one way or the other, frequently, transitions need to be identified and penalized in order for their frequency to be minimized. The p
Braz. J. Chem. Eng.. Publicado em: 2017-10
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27. ESTRUTURAS DE FULERENOS: ESTABELECENDO INTERFACES NO ENSINO DE MATEMÁTICA E QUÍMICA EM NÍVEL SUPERIOR
The objective of this paper is to study fullerene geometry properties and attempt to stablish a dialogue between the teaching of mathematics and chemistry concepts using hands-on cardboard geometric models, in classroom, in order to facilitate the understanding of fullerene structures. This approach to the study of such molecules represents a unique opportun
Quím. Nova. Publicado em: 2017-09
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28. AN OPTIMIZATION MODEL TO MINIMIZE THE EXPECTED END-TO-END TRANSMISSION TIME IN WIRELESS MESH NETWORKS
ABSTRACT Time metrics are extremely important to evaluate the transmission performance on Wireless Mesh Networks (WMNs), whose main characteristic is to use multihop technology to extend the network coverage area. One of such metrics is WCETT (Weighted Cumulative Expected Transmission Time), in which transmission times per hop are weighted for both proactive
Pesqui. Oper.. Publicado em: 2017-08
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29. Impact Damage Analysis with Stress Continuity Constraints Fulfilment at Damaged-Undamaged Regions and at Layer Interfaces
Abstract Low-velocity impacts have a relevant importance for safety of laminated and sandwich composite structures, because they are highly susceptible to damage. In this paper, a 3D cost effective zig-zag model is developed in order to efficiently simulate such impacts. It a priori fulfills the continuity of out-of-plane stresses at layer interfaces, the co
Lat. Am. j. solids struct.. Publicado em: 2017-08
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30. Robust Optimal Adaptive Trajectory Tracking Control of Quadrotor Helicopter
Abstract This paper focuses on robust optimal adaptive control strategy to deal with tracking problem of a quadrotor unmanned aerial vehicle (UAV) in presence of parametric uncertainties, actuator amplitude constraints, and unknown time-varying external disturbances. First, Lyapunov-based indirect adaptive controller optimized by particle swarm optimization
Lat. Am. j. solids struct.. Publicado em: 2017-06
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31. The Art of Time Travel: An 'Insoluble' Problem Solved
ABSTRACT In 'An Insoluble Problem' (2010), Storrs McCall presents an argument which he takes to reveal the real problem with backwards time travel. McCall asks us to imagine a scenario in which a renowned artist produces his famous works by copying them from reproductions brought back to him by a time-travelling art critic. The novelty of the scenario lies i
Manuscrito. Publicado em: 2016-12
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32. Staphylococcus xylosus fermentation of pork fatty waste: raw material for biodiesel production
ABSTRACT The need for cleaner sources of energy has stirred research into utilising alternate fuel sources with favourable emission and sustainability such as biodiesel. However, there are technical constraints that hinder the widespread use of some of the low cost raw materials such as pork fatty wastes. Currently available technology permits the use of lip
Braz. J. Microbiol.. Publicado em: 2016-09
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33. PACKING CIRCLES WITHIN CIRCULAR CONTAINERS: A NEW HEURISTIC ALGORITHM FOR THE BALANCE CONSTRAINTS CASE
ABSTRACT In this work we propose a heuristic algorithm for the layout optimization for disks installed in a rotating circular container. This is a unequal circle packing problem with additional balance constraints. It proved to be an NP-hard problem, which justifies heuristics methods for its resolution in larger instances. The main feature of our heuristic
Pesqui. Oper.. Publicado em: 2016-08
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34. Formation Flight Control of Multi-UAV System with Communication Constraints
ABSTRACT Three dimensional formation control problem of multi-UAV system with communication constraints of non-uniform time delays and jointly-connected topologies is investigated. No explicit leader exists in the formation team, and, therefore, a consensus-based distributed formation control protocol which requires only the local neighbor-toneighbor informa
J. Aerosp. Technol. Manag.. Publicado em: 2016-06
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35. More than environmental control at local scales: do spatial processes play an important role in floristic variation in subtropical forests?
ABSTRACT The effect of environmental variables on the plant species distribution in the Atlantic Forest raises the interest of researchers, but few studies, mainly at local scales, analyzed the influence of spatial factors on the environment and species distribution. Linear models and spatial correlograms were used to evaluate whether environment and space m
Acta Bot. Bras.. Publicado em: 01/04/2016
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36. Brazilian Portuguese-English bilingualism does not affect metalinguistic awareness of L1 constraints in two argument structure constructions
Abstract In the present study we investigated a corollary of the multicompetence hypothesis as a description of language representation in bilingualism. According to this hypothesis, bilingualism entails a state of linguistic knowledge that does not correspond either to L1 or L2 norms. Previous studies examining online language processing of sentences in Por
Ilha Desterro. Publicado em: 2016-04