Search results for "Pointing"
showing 5 items of 25 documents
STUDIO DI UNA FRIZIONE MAGNETOREOLOGICA PER AUTOVEICOLI
2013
Dopo un’accurata ricerca bibliografica sui fluidi magnetoreologici, il loro comportamento ed impiego, si è passati alla progettazione di una frizione magnetoreologica per autoveicoli. Considerando le caratteristiche di coppia trasmessa e potenza, il dispositivo è stato dimensionato tenendo presente i vincoli di ingombro del veicolo preso in esame. Sottoponendo il dispositivo ad analisi magnetostatica agli elementi finiti, si è determinato l’andamento delle linee di flusso del campo magnetico nel meato di fluido e nelle zone di maggior interesse, calcolando la coppia teoricamente trasmessa dall’innesto.È stato anche eseguito il confronto delle prestazionifra una frizione MR ed una frizione t…
Komunikatīvie žesti agrīnajā valodas apguvē
2018
Samērā nesen zinātnieki sāka pievērst uzmanību agrīnājai valodas apguvei, jo pirms tam nepastāvēja būtiskas atšķirības starp valodu macīšanās procesu un valodu apguvi. Mūsdienās ir veikti pētījumi saistībā ar pirmās valodas apguvi (Lust un Foley, 2008; Clark, 2009), tāpat arī veikti pētījumi otras valodas apguvē (Saville-Troike, 2006), bilingvālās valodas apguves pētījumi (Houwer, 2009), kā arī mazbērnu valodas pētījumi (Crystal, 2005). Šajā maǧistra darbā tika ietverti bērnu žestu pētījumi (Iverson et al., 1999; Blake, 2007; Cochet and Vauclair, 2012; Hoff, 2014). Blake (2007) un Hoff (2014) pētījumi balstīti uz komunikatīviem žestiem, bet (Iverson et al.(1999) un Cochet un Vauclair (2012)…
Coordinating action in technology-supported shared tasks: Virtual pointing as a situated practice for mobilizing a response
2021
Drawing on recordings of remote screen-based work meetings in Finland, this conversation analytic study investigates interactive properties of mouse cursor movements in technology-mediated shared tasks. The article illustrates how participants rely on features afforded by the input device in ways that divert from its pre-designed functions to accomplish virtual pointing gestures. These gestures serve as an organizational resource in the precursory phase of action, i.e. when a next on-screen action is observably made relevant. In this sequential environment, pointing by means of the tool is a collaborative resource: an embodied practice for sustaining co-orientation and advancing the sequent…
Space-by-Time Modular Decomposition Effectively Describes Whole-Body Muscle Activity During Upright Reaching in Various Directions
2017
The modular control hypothesis suggests that motor commands are built from precoded modules whose specific combined recruitment can allow the performance of virtually any motor task. Despite considerable experimental support, this hypothesis remains tentative as classical findings of reduced dimensionality in muscle activity may also result from other constraints (biomechanical couplings, data averaging or low dimensionality of motor tasks). Here we assessed the effectiveness of modularity in describing muscle activity in a comprehensive experiment comprising 72 distinct point-to-point whole-body movements during which the activity of 30 muscles was recorded. To identify invariant modules o…
Anticipatory Postural Adjustments and kinematic arm features when postural stability is manipulated
2018
International audience; Beyond the classical paradigm that presents the Anticipatory Postural Adjustments (APAs) as a manner to create forces that counteract disturbances arising from the moving segment during a pointing task, there is a controversial discussion about the role APAs to facilitate the movement and perform a task accurately. In addition, arm kinematics features are classically used to infer the content of motor planning for the execution and the control of arm movements, The present study aimed to disentangle the conflicting role of APAs during an arm-pointing task in which the subjects reach a central diode that suddenly turns on, while their postural stability was manipulate…