The experimental values of the friction factor (fp) at ambient and elevated temperatures as well as of the heat transfer coefficient (hp) were used to establish the analogy between momentum and heat transfer in gas-solid packed beds of monosized spherical glass particles, as jH=fp/22 or jHε=fp/50. Also, the Chilton-Colburn type of momentum-...

By Radojica Pešić, Nevenka Bošković-Vragolović, Zorana Arsenijević, Goran Tadić, Tatjana Kaluđerović Radoičić

Occupational safety and health (OSH) is an integral part of the organization of work, and includes measures and means necessary to achieve safe working conditions. In terms of the current Law on Occupational Safety and Health of the Republic of Srpska, among other things, the employer is responsible for drafting the Risk Assessment Act. This paper ...

By Dragana Pavlović, Dragica Lazić, Dragana Kešelј, Zoran Petrović, Dragana Dragojlović, Nebojša Vasilјević

This paper describes the concept of modern SCADA systems in general, as well as in BiH substations, and its connection to remote control centers, with a focus on redundancy, reliability and availability. Also, benefits from the usage of redundant protocols, RTU redundancy, usage of industrial equipment designed to work in substation environment and...

By Goran Savić, Goran Tadić

The electrohydrodynamics’ (EHD) perfect dielectric model was added into computational fluid dynamics (CFD) software OpenFOAM in order to improve its usability for the EHD field and specifically for the mentioned model. Based on the investigated literature, it can be said that this is the most complete implementatiton of the said model. Two se...

By Stefan A. Bošković, Aleksandar Karač, Slobodan B. Vrhovac, Aleksandar Belić, Branko Bugarski

Amiloride (AMI) is a representative of diuretics. Among other purposes, it is utilized for high blood pressure or swelling induced by heart failure. While it is identified as one of the safest medicines available, it is also listed in the World Anti-doping Agency’s list of substances banned in sport, because it is considered a masking agent. ...

By Svetlana Pelemiš, Sanja J. Armaković, Bogdan T. Tomić, Stevan Armaković

Designing shell and tube heat exchangers is a complex and time-consuming procedure. Since they are one of the most common process units in process industry, great effort should be made to improve their design and to facilitate the design procedure. Therefore, in this study, an easy-to-use MATLAB application for shell and tube heat exchanger prelimi...

By Dario Balaban, Goran Tadić

Diabetes is a complex, chronic illness that demands a healthy diet. The overall quality of consumed food is important for diabetics, but benefits are expected from whole grains and lower-energy food. Choice of appropriate sweet bakery product may present the problem for diabetics in meal planning. The aim of this research is to provide an overview ...

By Slavica Grujić, Božana Odžaković

In this paper a mathematical model for the soda ash drying process in a pneumatic dryer was presented. The model presents a macroscopic aspect of the drying process, for a two-phase, gas-solid system. The model is based on mass and heat transfer between the gas phase and the particle, movement of air and particles through the system, and geometric ...

By Edisa Papraćanin, Nisad Avdić, Abdel Đozić, Ervin Karić

The presence of microscopic particles of plastic (MP) in food is currently an urgent problem in the modern food industry and one of the main issues of food safety. However, there are no clear methods for the determination of such particles, nor methods for cleaning food products from them. In the present work, for the first time, the method of Dyna...

By Kornilov Kirill Nikolaevich, Roeva Nataliya Nickolaevna

In traditional medicine Thymus serpyllum L. (wild thyme) herb represents a part of a large number of herbal medicinal formulations such as syrups, tinctures, infusions, teas, and decoctions. In recent years, there has been a growing interest in testing the biological properties of wild thyme, because the plant is a high-quality raw material, rich i...

By Aleksandra A. Jovanović, Bojana D. Balanč, Predrag Petrović, Radoslava Pravilović, Verica B. Djordjević