The motion of the ball thrown by a pitcher is influenced by three forces: gravity, drag force due to air resistance, and lift force which deflects a ball vertically or laterally due to ball spin. The lift force acting on the ball increases with spin rate and movement speed when the spin axis of the ball is orthogonal to the direction of ball movement. Among individual pitchers there were great ...

Homography H Least-squares M b) a) c) Ball_1 Ball_2 Ball_3 Ball_4 b) H r g r g π 1 π 2 Fig. 1. Top left, panel (a), images of two planes are related by an homography. Right, panel (b), 4 images of a colored ball are shown. Ball 1 is the reference image where the illumination color is white and placed behind the camera. Ball 2 is the object illuminated with a blue light from above. Respectively,...

We propose an adaptive method that can estimate 3D position of a soccer ball by using two viewpoint videos. The 3D position of a ball is essential to realize a 3D free viewpoint browsing system and to analyze of soccer games. At an image processing step, our method detects the ball by selecting the best algorithm based on the ball states so as to minimize the chance to miss the ball and to redu...

recently, the use of renewable energies has increased to  environmental pollution, limitation of fossil energy resources and energy security  one of the means that enable us to use such energies is fuel cells (fc). however, there are many problems  in the commercialization of fc from an economically and operation perspective. one of the most important problems is heat management. new heat pipes...

Practicing with the use of a ball machine could handicap a player compared to playing against an actual opponent. Recent studies have shown some differences in swing timing and movement coordination, when a player faces a ball projection machine as opposed to a human opponent. We focused on the time of movement initiation and on stroke timing during returning tennis serves (simulated by a ball ...

The gauge-mediated SUSY-breaking (GMSB) model needs entropy production at a relatively low temperature in the thermal history of the Universe for the unwanted relics to be diluted. This requires a mechanism for the baryogenesis after the entropy production, and the Affleck and Dine (AD) mechanism is a promising candidate for it. The AD baryogenesis in the GMSB model predicts the existence of th...

Crystal balls are generally considered as a medium to perform divination or fortune-telling. These imaginations are mainly from some fantasy films and fictions, in which an augur can see into past, present, or future through a crystal ball. With the different impressions, crystal ball has revealed itself a perfect interface for the users to access and to manipulate visual media in an intuitive,...

Anatase-to-rutile phase transformation was studied in milled and unmilled samples. Ball milling was carried out in two types of ball mills, planetary and tumbler, with a ball-to-powder ratio of 40:1 over 2-48 hours. First, the unmilled samples &#10were heated in the furnace at various temperatures for different periods of time. The results revealed that the anatase-to-rutile transformation comp...