Diagnosing fatigue in gait patterns by support vector machines and self-organizing maps

The aim of the study was to train and test support vector machines (SVM) and self-organizing maps (SOM) to correctly classify gait patterns before, during and after complete leg exhaustion by isokinetic leg exercises. Ground reaction forces were derived for 18 gait cycles on 9 adult participants. Immediately before the trials 7–12, participants were required to completely exhaust their calves with the aid of additional weights (44.4 ± 8.8 kg). Data were analyzed using: (a) the time courses directly and (b) only the deviations from each individual’s calculated average gait pattern. On an inter-individual level the person recognition of the gait patterns was 100% realizable. Fatigue recognition was also highly probable at 98.1%. Additionally, applied SOMs allowed an alternative visualization of the development of fatigue in the gait patterns over the progressive fatiguing exercise regimen.     

The Influence of Avoidance Temperament and Avoidance‐Based Achievement Goals on Flow

In the present research, we conducted two studies designed to examine the joint influence of avoidance temperament and avoidance‐based achievement goals on the experience of flow on a creativity task. In both a laboratory study (N = 101; M_age = 22.61, SD_age = 4.03; 74.3% female) and a naturalistic study (N = 102; M_age = 16.23, SD_age = 1.13; 48% female), participants high in avoidance temperament were shown to experience greater flow when performance‐avoidance goals were induced; no differences were found in any of the other three achievement goal conditions from the 2 × 2 achievement goal framework. These findings reveal a short‐term benefit for a disposition‐goal match grounded in avoidance motivation, and point to the need for more research on both avoidance‐based matches and the short‐term versus long‐term implications of such matches.     

The Medium Shapes the Message: McLuhan and Grice Revisited in Race Talk Online

Compared with the wealth of research accumulated on face‐to‐face social interactions, relatively little research has examined race talk within anonymous Web 2.0 mediums. We investigated online threaded comments on YouTube video clips of two race‐related incidents involving New Zealand television presenter Paul Henry. Through thematic content analysis, thematic analysis, and discourse analysis, it was found that characteristics unique to Web 2.0 were associated with the appearance of old‐fashioned racism and high‐levels of obscenity (together with modern racism/symbolic racism). The hyper‐low context of communication led to interpretive ambiguity; conversation sequences failed to follow Gricean maxims for cooperative communication, with most comments attracting no replies and the modal sequence being two turns. There was almost never resolution to a disagreement online: rather there was points‐scoring against opposing opinions and a tangential style of dialogue influenced by the asynchronous and anonymous nature of communication. The YouTube medium shaped but did not determine the message, as obscenity and racist content in the target video from the eliciting public figure influenced the subsequent degree of obscenity and hostility in the responses. A third corpus that examined responses to our own research on race talk presented on a news website (stuff.co.nz) underlined this point by engendering a dramatically different response to the same subject, retaining the tangential style of communication, but with little to no obscenity. A framework to understand race talk as a function of both medium and context effects is proposed. Copyright © 2014 John Wiley & Sons, Ltd.     

Der Sinn Pessimistischer Sätze

Ohne Zusammenfassung