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During gaze shifts, humans can use visual, vestibular, and proprioceptive feedback, as well as feedforward mechanisms, for stabilization against active and passive head movements. The contributions of feedforward and sensory feedback control, and the role of the cerebellum, are still under debate. To quantify these contributions, we increased the head moment of inertia in three groups (ten healthy, five chronic vestibular-loss and nine cerebellar-ataxia patients) while they performed large gaze shifts to flashed targets in darkness. This induces undesired head oscillations. Consequently, both active (desired) and passive (undesired) head movements had to be compensated for to stabilize gaze. All groups compensated for active and passive head movements, vestibular-loss patients less than the other groups (P < 0.001, passive/active compensatory gains: vestibular-loss 0.23 ± 0.09/0.43 ± 0.12, healthy 0.80 ± 0.17/0.83 ± 0.15, cerebellar-ataxia 0.68 ± 0.17/0.77 ± 0.30, mean ± SD). The compensation gain ratio against passive and active movements was smaller than one in vestibular-loss patients (0.54 ± 0.10, P = 0.001). Healthy and cerebellar-ataxia patients did not differ in active and passive compensation. In summary, vestibular-loss patients can better stabilize gaze against active than against passive head movements. Therefore, feedforward mechanisms substantially contribute to gaze stabilization. Proprioception alone is not sufficient (gain 0.2). Stabilization against active and passive head movements was not impaired in our cerebellar ataxia patients.

This study examines the effects of the effectiveness of the internal control system (ICS) on crisis management skills (before, during, and after the crisis) in the event of a disaster through the Istanbul Metropolitan Municipality (IMM) Fire Service Department.   Methodologically, a comprehensive survey questionnaire was used to collect data from 251 workers of the IMM fire service department located on the Anatolian side of Istanbul. Statistic Package for Social Sciences (SPSS) version 22 used to analyze data by running among other reliability tests, T-Test, ANOVA, and Regression analysis.  The results of the study indicated that ICS of the Fire Service Department of IMM showed high levels of effectiveness in the event of a disaster and that the institution has a high level of crisis management skills. In addition, the study found that a high positive relationship existed between ICS and Crisis Management Skills of the IMM fire service department before, during, and after the crisis in the event of a disaster. Finally, the study revealed that, ICS has a positive and high impact on IMM crisis management skills before, during, and after the crisis, and that the effectiveness of ICS had increased the crisis management skills of the institution.

Briefly, the first thing that comes to mind about the concept of digital games, which means the games that people play against the screen by means of a control device, is that they have a pleasant time for individuals besides developing their intelligence and cognitive abilities. These fun times affect the subjective well-being of individuals positively. In this study, it is aimed to determine the effect of digital game play on subjective well-being of individuals, to analyze the reasons for playing games and to produce a number of solutions on these subjects. The findings of the study are shortly that digital games are positively related to subjective well-being variables.