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The subjective impressions of pedestrians are necessary in order to decide on the appropriate colour of light to be used for street lighting. Therefore, a pilot project aimed to compare subjective evaluations of the sidewalk illumination under two street lighting installations, realised by LEDs of 3000 K (warm white) and 4000 K (neutral white), was recently conducted in Belgrade. Both installations had comparable sidewalk illuminances as well as other relevant photometric parameters. The evaluation was done through a questionnaire. A group of 139 (61 male and 78 female) respondents, all of them university students, was asked to grade both lighting installations for the sidewalk light intensity, the appearance of human faces, the colour of light and the colour rendering as well as the overall impression. According to the median values, the 3000 K LED installation was considered better than the 4000 K installation for all aspects assessed as well as the overall impression. Although the survey results convincingly showed a preference for 3000 K LEDs for this comparison, additional research is needed using a more representative sample of people and a wider range of locations before a definite conclusion can be reached. [ABSTRACT FROM AUTHOR]

Abstract: Hip fracture has epidemic character in the world, including Serbia, which is significant for its medical and social consequences on the one hand and economic on the other, taking into account the increasing number of elderly in Serbia. Socio-medical aspects of hip or femur fracture were researched on the territory of Belgrade, within two groups of patients, younger (age 20–64) compared to elderly (age 65+). [Copyright &y& Elsevier]