On-court instruction involving either Perception–action training or Perception-only training was used to improve anticipation skill in novice tennis players. A technical instruction group acted as a control. Participants’ ability to anticipate an opponent’s serve was assessed preand posttest using established on-court measures involving frame-by-frame video analysis. The perception–action and p...

Playing an instrument is a physical skill learned through observation, repetition and rehearsal. Students of orchestral instruments seek one-to-one tuition from expert musicians. However as they become more accomplished, the number of suitable tutors becomes more concentrated, especially for less common instruments. Often a tutor-student relationship develops over several years and temporary se...

The paper describes importance of the reactive power control basing on the failures and control problems in the Polish transmission networks. A detailed description of the operational difficulties is provided. The paper also presents a highly automated method identifying voltage control areas (VCA), areas prone to voltage instability, and reactive power reserves requirement ensuring voltage sta...

We investigate the expression of opinions about human entities in user-generated content (UGC). A set of 2,800 online news comments (8,000 sentences) was manually annotated, following a rich annotation scheme designed for this purpose. We conclude that the challenge in performing opinion mining in such type of content is correctly identifying the positive opinions, because (i) they are much les...

In this paper we evaluate how to effectively use the crowdsourcing service, Amazon's Mechanical Turk (MTurk), to content analyze textual data for use in psychological research. MTurk is a marketplace for discrete tasks completed by workers, typically for small amounts of money. MTurk has been used to aid psychological research in general, and content analysis in particular. In the current study...

The problem of inferring 3D orientation of a camera from video sequences has been mostly addressed by first computing correspondences of image features. This intermediate step is now seen as the main bottleneck of those approaches. In this paper, we propose a new 3D orientation estimation method for urban (indoor and outdoor) environments, which avoids correspondences between frames. The basic ...

In this paper we describe the design and evaluation of an interactive system for audience participation in live performances using smart phones to control the stereo panorama of the lead guitar. The systemwas developed through feedback from both spectators and artists. The evaluation was conducted during a live concert and builds on interviews and video analysis. Findings include that musicians...

Kurzfassung. Taking an inspiration from psychological studies of visual attention, the contribution of this paper lies in prediction of the critical points of the trajectory using the structure of a scene and physical motion model. On one side, we present our approach for video analysis that differs from traditional tracking techniques by predicting future states of the moving object rather tha...

We introduce an easy-to-use video browsing tool which assists users in getting a quick overview of videos as well as in finding segments of interest. It provides a parallel and a tree-based view for browsing the content of videos – or even video collections – in a hierarchical, non-sequential manner. The tool has a plug-in architecture and can be extended both by further presentation methods an...

We present a method for modeling disordered solid solutions, based on the virtual crystal approximation ~VCA!. The VCA is a tractable way of studying configurationally disordered systems; traditionally, the potentials which represent atoms of two or more elements are averaged into a composite atomic potential. We have overcome significant shortcomings of the standard VCA by developing a potenti...