Law enforcement is a stressful occupation with both work-related and social-related stressors. Too much stress can negatively affect behaviours, mental states, and job performance. Centralized police organizations limit officers’ individual autonomy, likely increasing stress. This study examined differences in occupational stress in two different European countries and one Middle East country. Participants were 351 male police officers from Serbia (n = 130, age 36 ± 8 years), Russia (n = 121, age 22 ± 4 years), and Lebanon (n = 100, age 36 ± 6 years) who completed the 20-item Operational Police Stress Questionnaire in their own language. Items were averaged and interpreted as low (≤2.0), stress (2.1–3.4), and high stress (≥3.5). Analysis of covariance (ANCOVA) analyses using age as the covariate with Bonferroni post hoc analyses were used. A principal component analysis (PCA) was used to determine stress structure per country. Significant differences were found with lower occupational stress in Russian (P < 0.001) and Lebanon (P = 0.003) than Serbian officers. PCA factor patterns differed by country, with six found for Russian and Lebanese and three for Serbian officers. More work-related stressors were rated higher for the younger Russian officers, while more social-related stressors were rated higher for the older Serbian officers. Results suggest that it is vital to consider officers’ stress sources and overall stress levels.
This article describes the manufacturing technology of biocompatible flexible strain-sensitive sensor based on Ecoflex silicone and multi-walled carbon nanotubes (MWCNT). The sensor demonstrates resistive behavior. Structural, electrical, and mechanical characteristics are compared. It is shown that laser radiation significantly reduces the resistance of the material. Through laser radiation, electrically conductive networks of MWCNT are formed in a silicone matrix. The developed sensor demonstrates highly sensitive characteristics: gauge factor at 100% elongation −4.9, gauge factor at 90° bending −0.9%/deg, stretchability up to 725%, tensile strength 0.7 MPa, modulus of elasticity at 100% 46 kPa, and the temperature coefficient of resistance in the range of 30–40 °С is −2 × 10−3. There is a linear sensor response (with 1 ms response time) with a low hysteresis of ≤3%. An electronic unit for reading and processing sensor signals based on the ATXMEGA8E5-AU microcontroller has been developed. The unit was set to operate the sensor in the range of electrical resistance 5–150 kOhm. The Bluetooth module made it possible to transfer the received data to a personal computer. Currently, in the field of wearable technologies and health monitoring, a vital need is the development of flexible sensors attached to the human body to track various indicators. By integrating the sensor with the joints of the human hand, effective movement sensing has been demonstrated.
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