There is little research on the study of specific characteristics that contribute to the faster adaptation of athletes during the transition from one sport to another. We used virtual reality (VR) to study the differences between professional ice hockey players and other sport professionals (freestyle wrestlers), who were novices in hockey in terms of motor responses and efficiency performance, on different levels of difficulty. In the VR environment, four levels of difficulty (four blocks) were simulated, depended on the speed of the puck and the distance to it (Bl1—60–80 km/h and 18 m; Bl2—60–100 km/h, distances 12 and 18 m; Bl3—speeds up to 170 km/h and 6, 12, and 18 m; Bl4—the pucks are presented in a series of two (in sequence with a 1 s interval)). The results of the study showed that the hockey professionals proved to have more stable movement patterns of the knee and hip joints. They also made fewer head movements as a response to stimuli during all runs (0.66 vs. 1.25, p = 0.043). Thus, working out on these parameters can contribute to the faster adaptation of wrestlers in developing professional ice hockey skills.

Hand motion tracking plays an important role in virtual reality systems for immersion and interaction purposes. This paper discusses the problem of finger tracking and proposes the application of the extension of the Madgwick filter and a simple switching (motion recognition) algorithm as a comparison. The proposed algorithms utilize the three-link finger model and provide complete information about the position and orientation of the metacarpus. The numerical experiment shows that this approach is feasible and overcomes some of the major limitations of inertial motion tracking. The paper’s proposed solution was created in order to track a user’s pointing and grasping movements during the interaction with the virtual reconstruction of the cultural heritage of historical cities.

This paper presents a model of saccadic eye movements. Eye movements are considered as being ballistic, since saccades (rapid concurrent movements of both eyes) occur several hundred thousand times...

The article sets a problem focusing on how to optimize the order of 3D user interface for virtual reconstruction of Moscow historical center landscape in the 16th-18th centuries. To work with the interface a virtual reality headset, a motion tracking system and an eye-tracker were integrated. Spatial representation of the historical reconstruction is accompanied by a specialized interface that allows one to access the source database. The authors introduce a criterion that provides for estimating the optimum order of interface elements in the virtual space. The problem is handled in case there are unknown factors such as the size of user's hands, deviations in the position of an interactive object and restrictions related to the disposition of interface elements. The article sets the general problem and solves some internal problems related to the construction of acceptable multiple dispositions of interface elements and the modeling of eyesight movement from one interface element to another. The article is the first to suggest an algorithm to numerically optimize the interface in 3D virtual space modeling the relief and historical buildings in the center of Moscow. It provides for user’s movement and gives access to historical sources which are the basis for virtual reconstruction of the heritage understudy.

The problem of description and classification of rapid eye movements called saccades is considered. It is well known that the saccades are of various types. A classification of saccades is proposed...

Hospitality technologies are developing very rhythmically. Today, accommodation establishmentsface the main task: to attract the attention of a more significant number of guests who would become regular visitors. The hotel business is multifunctional, and its management is a complex task requiring newtechnologies. It is only possible to carry out these tasks with innovative solutions, which need to modernizethe accommodation enterprises and be guided by international standards of hospitality. A comprehensiveapproach to the definition of tourist services necessitates expanding additional services. In the conditions ofEuropean integration, other services acquire specific features, affecting the market attractiveness of thehotel enterprise. Remaining the main one, the accommodation service is characterized by stability. Theservices that distinguish this accommodation facility from others are of increased interest. The articleshows the expediency of organizing tourist and festival events as additional services of tourist and entertainment complexes, which will positively impact the development of the southern region of Ukraine.