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The effect of social context on the use of visual information
Streuber, Stephan,Knoblich, Gü,nther,Sebanz, Natalie,Bü,lthoff, Heinrich H.,de la Rosa, Stephan Springer-Verlag 2011 Experimental brain research Vol.214 No.2
<P>Social context modulates action kinematics. Less is known about whether social context also affects the use of task relevant visual information. We tested this hypothesis by examining whether the instruction to play table tennis competitively or cooperatively affected the kind of visual cues necessary for successful table tennis performance. In two experiments, participants played table tennis in a dark room with only the ball, net, and table visible. Visual information about both players’ actions was manipulated by means of self-glowing markers. We recorded the number of successful passes for each player individually. The results showed that participants’ performance increased when their own body was rendered visible in both the cooperative and the competitive condition. However, social context modulated the importance of different sources of visual information about the other player. In the cooperative condition, seeing the other player’s racket had the largest effects on performance increase, whereas in the competitive condition, seeing the other player’s body resulted in the largest performance increase. These results suggest that social context selectively modulates the use of visual information about others’ actions in social interactions.</P>
Anatomy of Gossamer superconductivity
Stephan Haas,Kazumi Maki,Thomas Dahm,Peter Thalmeie 한국물리학회 2007 Current Applied Physics Vol.7 No.1
There are many systems in which two order parameters compete with each other. Of particular interest are systems in which theseorder parameters are both unconventional. In this contribution, we examine the representative example of a d-wave superconductorTc superconductors.The physical properties of unconventional superconductivity in the presence of an anisotropic charge density wave are investigatedwithin mean eld theory. This model describes many features that were anticipated by an earlier phenomenological treatment of Tallonand Loram. In addition, the quasiparticle density of states in the presence of these two order parameters is calculated, which should beaccessible by scanning tunneling microscopy
STEPHANE BALAC 한국산업응용수학회 2013 Journal of the Korean Society for Industrial and A Vol.17 No.4
The Interaction Picture (IP) method is a valuable alternative to Split-step methods for solving certain types of partial differential equations such as the nonlinear Schrodinger equation or the Gross-Pitaevskii equation. Although very similar to the Symmetric Split-step (SS) method in its inner computational structure, the IP method results from a change of unknown and therefore do not involve approximation such as the one resulting from the use of a splitting formula. In its standard form the IP method such as the SS method is used in conjunction with the classical 4th order Runge-Kutta (RK) scheme. However it appears to be relevant to look for RK scheme of higher order so as to improve the accuracy of the IP method. In this paper we investigate 5th order Embedded Runge-Kutta schemes suited to be used in conjunction with the IP method and designed to deliver a local error estimation for adaptive step size control.
Novel approach for early damage detection on rotor blades of wind energy converters
Stephan Zerbst,Stavroula Tsiapoki,Raimund Rolfes 국제구조공학회 2014 Smart Structures and Systems, An International Jou Vol.14 No.3
Within this paper a new approach for early damage detection in rotor blades of wind energy converters is presented, which is shown to have a more sensitive reaction to damage than eigenfrequency-based methods. The new approach is based on the extension of Gasch\' s proportionality method, according to which maximum oscillation velocity and maximum stress are proportional by a factor, which describes the dynamic behavior of the structure. A change in the proportionality factor can be used as damage indicator. In addition, a novel deflection sensor was developed, which was specifically designed for use in wind turbine rotor blades. This deflection sensor was used during the experimental tests conducted for the measurement of the blade deflection. The method was applied on numerical models for different damage cases and damage extents. Additionally, the method and the sensing concept were applied on a real 50.8 m blade during a fatigue test in the edgewise direction. During the test, a damage of 1.5 m length was induced on the upper trailing edge bondline. Both the initial damage and the increase of its length were successfully detected by the decrease of the proportionality factor. This decrease coincided significantly with the decrease of the factor calculated from the numerical analyses.