Search results for "Off time"

showing 2 items of 2 documents

Daily modulation of the speed–accuracy trade-off

2017

International audience; Goal-oriented arm movements are characterized by a balance between speed and accuracy. The relation between speed and accuracy has been formalized by Fitts’ law and predicts a linear increase in movement duration with task constraints. Up to now this relation has been investigated on a short-time scale only, that is during a single experimental session, although chronobiological studies report that the motor system is shaped by circadian rhythms. Here, we examine whether the speed–accuracy trade-off could vary during the day. Healthy adults carried out arm-pointing movements as accurately and fast as possible toward targets of different sizes at various hours of the …

AdultMaleMovement050105 experimental psychologySession (web analytics)Task (project management)Executive FunctionYoung Adult03 medical and health sciences0302 clinical medicineMotor imageryTask Performance and AnalysisMotor systemModulation (music)speed–accuracy trade-off time-of-day modulation arm pointing motor imageryReaction TimeHumans0501 psychology and cognitive sciencesBalance (ability)Communicationbusiness.industryMovement (music)General Neuroscience05 social sciencesDimensional Measurement AccuracyDuration (music)[ SDV.NEU ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]SleepPsychologybusinessPsychomotor Performance030217 neurology & neurosurgeryCognitive psychologyNeuroscience
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Analysis of gate freeze-off time in injection molding

2004

Gate solidification time is an important topic in injection molding technology, as it determines cycle time, which itself is an important issue in the economics of the production process. In this work, a study of the effect of both gate and cavity geometries on gate solidification time was conducted, using a commercial polymer, injection molded with constant holding pressure into a rectangular cavity. Three cavity lengths were used, and for each, two cavity thicknesses were adopted. Spe- cial dies containing different gates were assembled in the mold. Gate thickness was found to be the most important factor determining gate sealing time. However, the cavity geometry is also quite important.…

chemistry.chemical_classificationWork (thermodynamics)Materials sciencePolymers and PlasticsTime evolutionMechanical engineeringGeneral ChemistryPolymerMolding (process)Mechanicsmedicine.disease_causeVolumetric flow ratechemistryMoldMaterials ChemistrymedicineInjection Molding ModelingOff timeHeat flow
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