This paper presents the methodology for verification the reducer and couplings as the components of drive unit on the example of belt conveyor for ore with capacity of 2000 t/h at the open pit “Veliki Krivelj”. Analysis was done by calculation according to the manufacturer instructions of the Falk Company, and its results are indispensable for checking the reliability of functionality the drive unit components in the given operating conditions. Also, the technical characteristics of these components are given, as well as their graphical representation.

Acne vulgaris (acne) is chronic inflammatory dermatosis which affects the pilosebaceous unit, with a varied clinical picture including inflammatory and non-inflammatory cutaneous lessions. This multifactorial disease mostly occurs in adolescents; however, it can also affect children and adults. Different therapy options for acne treatment exist, comprising topical, systemic and hormonal agents or a combination thereof. The choice of the therapy depends on various factors, for instance the severity and extent of the disease and site of involvement. Commonly used topical acne therapies include benzoyl peroxide, salicylic acid, antibiotics, retinoids, azelaic acid, sulfone agents and their combinations. Systemic antibiotics are indicated for use in moderate to severe inflammatory acne and should be used in combination with a topical retinoid and benzoyl peroxide. The available conventional formulations often cause side effects such as skin irritation, dryness, peeling, itching, leading to reduced patient compliance and compromised therapeutical efficacy. Novel drug delivery systems are promising option for improved acne treatment outcome, as they can diminish the side effects caused by the therapeutic agents or can modulate their properties and at the same time offering possibilities for modified release and improved skin penetration of the active substances. The cosmetics manufacturers implement micro/nanotechnology in their formulations, while patent protection for cosmetics has gained more importance over the past decades. This review focuses on micro/nanoparticulated carrier systems that can be used for acne treatment and the published patents concerning them.

Paper compares numbers of publications published in indexed journals by authors from two cities, Tuzla and Sombor, approximately the same size during half of XX century, in order to determine how a newly opened medical school influences scientific research. Today, in Sombor only Faculty of Pedagogy exists (a part of Novi Sad University). From 1977-1979. number of publications from both cities was very low (only 2-4). Thirty years later, from 2009-2014. number of papers from Tuzla increased many fold (65-98 papers/year), while from Sombor remained low (0-4 papers/year) over the same period. Factors contributing to this phenomenon include: university environment, participation of most medical doctors in postgraduate research programs, exchange programs with other medical schools, both local and abroad, and significant financial support for medical students and research grants. Sombor enjoys no such financial support, and various temporary stimuli have failed to influence research and publishing significantly. Sombor doctors continue to present their observations and data at various meetings, but do not submit manuscripts to medical journals. Furthermore, the Sombor hospital administration does not support participation of physicians in graduate programs or doctoral studies. The rising number of published papers in Tuzla indicates that a larger medical center or hospital may not only inspire original research but may also guide busy physicians through process of publishing their manuscripts in medical journals. In this paper, details of postgraduate education at Medical School Tuzla are elaborated, and the idea of opening medical school in Sombor, first mentioned in the 1960s, is reiterated.