846 research outputs found
Poincare duality for K-theory of equivariant complex projective spaces
We make explicit Poincare duality for the equivariant K-theory of equivariant complex projective spaces. The case of the trivial group provides a new approach to the K-theory orientation
Athletes' perceived use of information sources when forming initial impressions and expectancies of a coach: An explorative study
The study aimed to identify the sources of information that athletes perceive as influential during their initial evaluation of coaching ability. University athletes (N = 538) were asked to indicate the influence of 31 informational cues (e.g., gender, body language or gestures, reputation) on the initial impression formed of a coach. Following exploratory factor analysis, a 3-factor model, (i.e., static cues, dynamic cues, and third-party reports) was extracted. Mean scores revealed that although static cues (e.g., gender, race or ethnicity) were rated as relatively unimportant during impression formation, dynamic cues (e.g., facial expressions, body language or gestures) and third-party reports (e.g., coaching qualifications, reputation.) were viewed by athletes as influential factors in the formation of expectancies about coaches. Such findings have implications for the occurrence of expectancy effects in coach-athlete relationships and the way in which coaches seek to present themselves. © 2008 Human Kinetics, Inc
Expectancy effects in tennis: The impact of body language and playing record on impressions of a tennis player and ratings of performance
This study examined the impact that pre-event body language and knowledge of a performerâs playing record had on ratings of tennis performance. Participants (N = 123) were allocated to one
of four experimental groups (good body language/bad body language vs. positive playing
record/negative playing record) and viewed a live player warming up and completing a series of
tennis shots. Information outlining the playerâs recent win/loss record was coupled with body
language condition during a period of warm-up footage. Likert-type scales were employed to
record impressions of the player and judgements as to the quality of the play. ANCOVA revealed
that the player was viewed more favourably having displayed positive as opposed to negative body
language (p<.001). Participants presented with a positive playing record (p = .001) formed a more
favourable impression and rated the players performance more positively (p = 0.001). The study
corroborates and extends the findings of recent work incorporating live models in expectancy
effects investigations
Differentials in the homological homotopy fixed point spectral sequence
We analyze in homological terms the homotopy fixed point spectrum of a
T-equivariant commutative S-algebra R. There is a homological homotopy fixed
point spectral sequence with E^2_{s,t} = H^{-s}_{gp}(T; H_t(R; F_p)),
converging conditionally to the continuous homology H^c_{s+t}(R^{hT}; F_p) of
the homotopy fixed point spectrum. We show that there are Dyer-Lashof
operations beta^epsilon Q^i acting on this algebra spectral sequence, and that
its differentials are completely determined by those originating on the
vertical axis. More surprisingly, we show that for each class x in the
$^{2r}-term of the spectral sequence there are 2r other classes in the
E^{2r}-term (obtained mostly by Dyer-Lashof operations on x) that are infinite
cycles, i.e., survive to the E^infty-term. We apply this to completely
determine the differentials in the homological homotopy fixed point spectral
sequences for the topological Hochschild homology spectra R = THH(B) of many
S-algebras, including B = MU, BP, ku, ko and tmf. Similar results apply for all
finite subgroups C of T, and for the Tate- and homotopy orbit spectral
sequences. This work is part of a homological approach to calculating
topological cyclic homology and algebraic K-theory of commutative S-algebras.Comment: Published by Algebraic and Geometric Topology at
http://www.maths.warwick.ac.uk/agt/AGTVol5/agt-5-27.abs.htm
Behavioural responses of reptile predators to invasive cane toads in tropical Australia
The ecological impact of an invasive species can depend on the behavioural responses of native fauna to the invader. For example, the greatest risk posed by invasive cane toads (Rhinella marinaBufonidae) in tropical Australia is lethal poisoning of predators that attempt to eat a toad; and thus, a predator's response to a toad determines its vulnerability. We conducted standardized laboratory trials on recently captured (toad-naïve) predatory snakes and lizards, in advance of the toad invasion front as it progressed through tropical Australia. Responses to a live edible-sized toad differed strongly among squamate species. We recorded attacks (and hence, predator mortality) in scincid, agamid and varanid lizards, and in elapid, colubrid and pythonid snakes. Larger-bodied predators were at greater risk, and some groups (elapid snakes and varanid lizards) were especially vulnerable. However, feeding responses differed among species within families and within genera. Some taxa (notably, many scincid and agamid lizards) do not attack toads; and many colubrid snakes either do not consume toads, or are physiologically resistant to the toad's toxins. Intraspecific variation in responses means that even in taxa that apparently are unaffected by toad invasion at the population level, some individual predators nonetheless may be fatally poisoned by invasive cane toads. © 2013 Ecological Society of Australia
Day 1. Free Communications â Psychology (Session 2): The influence of body language and expected competency on gaze behaviour while forming an initial impression of a tennis player.
D1.S3.4(4).
BASES Conference 2015 (Burton-on-Trent), 1-2 December.
British Association of Sport and Exercise Science
The influence of body language and expected competency on gaze behaviour while forming an impression of a tennis player
Cues conveyed by an athleteâs appearance and reputational information provided prior to an encounter have independently been shown to influence the impression perceivers form of others. Underpinning this process, it is not known how a targetâs a) body language, b) gender or c) reputation may influence where a perceiver fixates their gaze when an individual comes in to view. Participants (N=106) randomly observed a male or female tennis player appearing on a monitor displaying positive or negative body language having been provided with that playerâs recent win/loss record. Eye tracking recorded gaze behaviour in the first 5 secs after the player came in to view. After segmentation of the player in to six areas of interest, MANCOVA at p<.05 showed a clear preference for perceivers to direct their gaze towards the playerâs head region. Body language and player gender influenced distribution of gaze per region of interest but this was largely unaffected by reputational information. This work indicates that the head region accounts for the largest proportion of gaze when individuals form judgements of opponents in a tennis setting. The balance of where observers look when forming these judgments is influenced by the gender of the player being observed and the body language being displayed
New weapons in the toad toolkit: A review of methods to control and mitigate the biodiversity impacts of invasive cane toads (rhinella marina)
© 2017 by The University of Chicago Press. All rights reserved. Our best hope of developing innovative methods to combat invasive species is likely to come from the study of high-profile invaders that have attracted intensive research not only into control, but also basic biology. Here we illustrate that point by reviewing current thinking about novel ways to control one of the worldâs most well-studied invasions: that of the cane toad in Australia. Recently developed methods for population suppression include more effective traps based on the toadâs acoustic and pheromonal biology. New tools for containing spread include surveillance technologies (e.g., eDNA sampling and automated call detectors), as well as landscape-level barriers that exploit the toadâs vulnerability to desiccationâ a strategy that could be significantly enhanced through the introduction of sedentary, rangecore genotypes ahead of the invasion front. New methods to reduce the ecological impacts of toads include conditioned taste aversion in free-ranging predators, gene banking, and targeted gene flow. Lastly, recent advances in gene editing and gene drive technology hold the promise of modifying toad phenotypes in ways that may facilitate control or buffer impact. Synergies between these approaches hold great promise for novel and more effective means to combat the toad invasion and its consequent impacts on biodiversity
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