BACKGROUND Adequate levels of physical activity are part of a healthy lifestyle and in this way linked to better health outcomes. For children and adolescents, the physical activity guideline recommends at least 60 minutes of moderate-to-vigorous physical activity every day. However, many adolescents are not physically active enough and they spend a lot of their time on sedentary activities (su...

We extend the Bayesian skill rating system of TrueSkill to accommodate score-based match outcomes. TrueSkill has proven to be a very effective algorithm for matchmaking — the process of pairing competitors based on similar skill-level — in competitive online gaming. However, for the case of two teams/players, TrueSkill only learns from win, lose, or draw outcomes and cannot use additional match...

A lthough computer and video games have existed for fewer than 40 years, they are already serious business. Entertainment software, the entertainment industry's fastest growing segment, currently generates sales surpassing the film industry's gross revenues. Computer games have significantly affected personal computer sales, providing the initial application for CD-ROMs, driving advancements in...

This review paper gathers together the key sources on the science of engagement and immersion, in particular the concept of flow. Flow is a psychological description for full immersion in an activity. It provides a useful framework within which to understand the coupling between pervasive computing and end users. The article discusses the concept of flow in a general psychological sense and ext...

This paper describes patterns of skill progression in Forza Motorsport 4, an Xbox 360 racing game. Using in-game telemetry data from more than 200,000 players and 24 million races, we characterize how players use and customize driving assists such as the trajectory line, automatic gear shifting, or assisted braking over time. We find that some of the assists are never disabled by significant pl...

Objective. To assess the impact of a single versus dual console robotic system on the perceptions of program directors (PD) and residents (RES) towards robotic surgical training among graduating obstetrics and gynecology residents. Design. An anonymous survey was developed using Qualtrics, a web-based survey development and administration system, and sent to obstetrics and gynecology program di...

Purpose. The purpose of this review article was to and analyze the available literature regarding one most advanced virtual reality technologies. We reviewed analyzed use computer-assisted rehabilitation environment system in assessment rehabilitation.
 Materials methods. PubMed, Web Science, Cochrane Library, Scopus, Physiotherapy Evidence Database databases were searched from inception O...

A necessary and sufficient condition for the existence of the general common positive solution to equations A1X = C1, XB2 = C2, A3XA ∗ 3 = C3, A4XA ∗ 4 = C4 for operators between Hilbert C-modules is established, and an expression for the common positive solution to the equations is derived when the solvability conditions are satisfied. As an application, a new necessary and sufficient conditio...