This paper presents “On-line AR Baseball Presentation System”, which is a vision-based AR application for entertainment. In this system, a user can watch a virtual baseball game scene on a real baseball field model placed on a tabletop through a web-camera attached to a hand-held LCD monitor. The virtual baseball scene is synthesized from an input history data of an actual baseball game. Visual...

Several studies have documented increased life expectancy and improved mortality for Major League Baseball players, but none has yet provided a complete analysis of baseball player mortality patterns over time. We selected all baseball players who debuted between 1900 and 1999, modeled numbers of deaths, calculated SMRs with 95% confidence intervals, and calculated life expectancies for basebal...

results grip strength and tip and palmer pinch strength in dominant side were statistically greater than them in nondominant side (p < 0.05). there were significant associations between grip strength and height (r = 0.33, p < 0.001), body mass (r = 0.50, p < 0.001), bmi (r = 0.37, p < 0.001), muscle mass of upper extremity (r = 0.56, p < 0.001), fat free mass (r = 0.57, p < 0.001), fat mass (r ...

PURPOSE To report the results of hip arthroscopy among high-level baseball players as recorded by outcome scores and return to baseball. METHODS All patients undergoing hip arthroscopy were prospectively assessed with the modified Harris Hip Score. On review of all procedures performed over a 12-year period, 44 hips were identified among 41 intercollegiate or professional baseball players who...

BACKGROUND The rate of early sport specialization in professional baseball players is unknown. PURPOSE To report the incidence and age of sport specialization in current professional baseball players and the impact of early specialization on the frequency of serious injuries sustained during the players' careers. We also queried participants about when serious injuries occurred, the players' ...

OBJECTIVE The objective of this study was to determine factors that are involved in shoulder injury rates among high school athletes who participate in organized baseball and softball. METHODS Baseball- and softball-related injury data were collected during the 2005-2008 academic years from approximately 74 nationally representative high schools via High School Reporting Information Online. ...

BACKGROUND Osteochondritis dissecans (OCD) lesions are often observed in the humeral capitellum both in young baseball players and gymnasts. It is generally believed that capitellar OCD in baseball players can be seen on an anteroposterior (AP) radiograph with the elbow in 45° of flexion. However, the mechanism of injury seems to be different in baseball players and gymnasts. Repetitive valgus ...

The purpose of this research was to examine how four different types of baseball helmets perform for baseball impacts when performance was measured using variables associated with concussion. A helmeted Hybrid III headform was impacted by a baseball, and linear and rotational acceleration as well as maximum principal strain were measured for each impact condition. The method was successful in d...

This paper outlines the appropriateness of using a quantitative research methodology that will examine several aspects of beep baseball as a way for the visually-impaired to lead more enjoyable leisure lives. Several experiments are mentioned in connection with this thesis, included are as follows: (1) a determination of the process problems for the visually impaired versus normally sighted peo...