Action Sequences and Dynamic Indicators of Contention

2021 ◽  
pp. 110-131
Author(s):  
Abel Bojar ◽  
Argyrios Altiparmakis
2017 ◽  
Vol 82 (2) ◽  
pp. 102-105
Author(s):  
O.K. Koloskova ◽  
◽  
O.O. Shahova ◽  
S.I. Tarnavska ◽  
N.O. Shevchenko ◽  
...  

2020 ◽  
pp. 28-32
Author(s):  
V.S. Vanaev

Development of complex determination of parameters of jackhammers at bench tests is studied. The modern support of tests of jackhammers for the purpose of definition of their energy, vibration and noise indicators is considered. Descriptions of the SORP universal bench and UIPU measuring complex are given. Keywords jackhammer, bench, tests, processing object, energy indicators, impact energy, dynamic indicators [email protected]


Author(s):  
Rachel M. Brown ◽  
Erik Friedgen ◽  
Iring Koch

AbstractActions we perform every day generate perceivable outcomes with both spatial and temporal features. According to the ideomotor principle, we plan our actions by anticipating the outcomes, but this principle does not directly address how sequential movements are influenced by different outcomes. We examined how sequential action planning is influenced by the anticipation of temporal and spatial features of action outcomes. We further explored the influence of action sequence switching. Participants performed cued sequences of button presses that generated visual effects which were either spatially compatible or incompatible with the sequences, and the spatial effects appeared after a short or long delay. The sequence cues switched or repeated across trials, and the predictability of action sequence switches was varied across groups. The results showed a delay-anticipation effect for sequential action, whereby a shorter anticipated delay between action sequences and their outcomes speeded initiation and execution of the cued action sequences. Delay anticipation was increased by predictable action switching, but it was not strongly modified by the spatial compatibility of the action outcomes. The results extend previous demonstrations of delay anticipation to the context of sequential action. The temporal delay between actions and their outcomes appears to be retrieved for sequential planning and influences both the initiation and the execution of actions.


2021 ◽  
Vol 21 ◽  
pp. 100752
Author(s):  
Lily A. Brown ◽  
Craig J. Bryan ◽  
Jonathan E. Butner ◽  
Jeffrey V. Tabares ◽  
Stacey Young-McCaughan ◽  
...  

2014 ◽  
Vol 26 (2) ◽  
pp. 296-304 ◽  
Author(s):  
Erman Misirlisoy ◽  
Patrick Haggard

The capacity to inhibit a planned action gives human behavior its characteristic flexibility. How this mechanism operates and what factors influence a decision to act or not act remain relatively unexplored. We used EEG readiness potentials (RPs) to examine preparatory activity before each action of an ongoing sequence, in which one action was occasionally omitted. We compared RPs between sequences in which omissions were instructed by a rule (e.g., “omit every fourth action”) and sequences in which the participant themselves freely decided which action to omit. RP amplitude was reduced for actions that immediately preceded a voluntary omission but not a rule-based omission. We also used the regular temporal pattern of the action sequences to explore brain processes linked to omitting an action by time-locking EEG averages to the inferred time when an action would have occurred had it not been omitted. When omissions were instructed by a rule, there was a negative-going trend in the EEG, recalling the rising ramp of an RP. No such component was found for voluntary omissions. The results are consistent with a model in which spontaneously fluctuating activity in motor areas of the brain could bias “free” decisions to act or not.


Author(s):  
Sebastian Strauß ◽  
Nikol Rummel

AbstractUnequal participation poses a challenge to collaborative learning because it reduces opportunities for fruitful collaboration among learners and affects learners’ satisfaction. Social group awareness tools can display information on the distribution of participation and thus encourage groups to regulate the distribution of participation. However, some groups might require additional explicit support to leverage the information from such a tool. Therefore, this study investigated the effect of combining a group awareness tool and adaptive collaboration prompts on the distribution of participation during web-based collaboration. In this field experiment, students in a university level online course collaborated twice for two-weeks (16 groups in the first task; 13 groups in the second task) and either received only a group awareness tool, a combination of a group awareness tool and adaptive collaboration prompts, or no additional support. Our results showed that students were more satisfied when the participation in their group was more evenly distributed. However, we only found tentative support that the collaboration support helped groups achieve equal participation. Students reported rarely using the support for shared regulation of participation. Sequence alignment and clustering of action sequences revealed that groups who initiated the collaboration early, coordinated before solving the problem and interacted continuously tended to achieve an equal distribution of participation and were more satisfied with the collaboration. Against the background of our results, we identify potential ways to improve group awareness tools for supporting groups in their regulation of participation, and discuss the premise of equal participation during collaborative learning.


2021 ◽  
Vol 89 (9) ◽  
pp. S121
Author(s):  
Eric Zimmerman ◽  
Zoe LaPalombara ◽  
Susanne Ahmari

1990 ◽  
Vol 11 (4) ◽  
pp. 409-424 ◽  
Author(s):  
Cheryl A. Smith ◽  
Jacqueline Sachs

ABSTRACTThe focus of this study is the cognitive/conceptual basis for the emergence of verbs in early lexical development. Twenty-four 12–19-month-old children were studied through (a) observation and maternal report of their acquisition of verbs in comprehension and production and (b) observation of nonverbal behavior reflected in play. There is substantive growth in the comprehension of verbs during this period, with a rapid increase between 14–16 months in the total number of verbs and decontextualized verbs comprehended, but no similar surge in production. Children's ability to consider others in the role of actor during play with objects was linked to the comprehension of verbs during this period; also, the ability to engage in symbolic action sequences on objects in play correlated with the decontextualized comprehension of verbs. These results suggest that underlying cognitive development in event representation may be related to the increased comprehension of verbs across contexts.


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