The technical state of the contact line and also the additional equipment in electric rail transport is very important for realizing the repairing and maintenance of the contact line. During its functioning, the pantograph motion must stay in standard limits. Present paper proposes a LabVIEW application which is able to track in real time the motio...

By R Rob, G O Tirian, M Panoiu

Shafts of electric locomotives are exposed to complex normal and tangential stresses during its exploitation. These stresses could have extremely high level producing the breakage of the shaft. It is well known that shafts have much longer service life than wheels. However, since the stresses in shaft’s material are high, it is possible to mi...

By M Todic, V Golubovic-Bugarski

Allelopathy is a process still little studied in the plant world, if we refer to the diversity of biochemical compounds, through which plants can interact with each other, with fungi or bacteria. Biochemical "dialogue" between organisms may have stimulatory or inhibitory effects, contributing to numerical setting of the populations, the assertion o...

By M Marian, Z Voşgan, O Mare Roşca, L Mihalescu

An alternative and cost-effective solution to developing integrated PV system is to use hybrid photovoltaic/thermal (PV/T) solar system. The temperature of PV modules increases due to the absorbed solar radiation that is not converted into electricity, causing a decrease in their efficiency. In hybrid PV/T solar systems the reduction of PV module t...

By M Dobrnjac, P Zivkovic, V Babic

The manufacturing of PEMFC stacks (POLYMER ELEKTROLYT MEMBRAN Fuel Cell) is nowadays still done by hand. Over hundreds of identical single components have to be placed accurate together for the construction of a fuel cell stack. Beside logistic problems, higher total costs and disadvantages in weight the high number of components produce a higher s...

By C K Jalba, A Muminovic, C Barz, V Nasui

The quality of electric energy capture and also the equipment operational safety depend essentially of the technical state of the contact line (CL). The present method for determining the technical state of CL based on advance programming is no longer efficient, due to the faults which can occur into the not programmed areas. Therefore, they cannot...

By S Rusu-Anghel, A Ene

A large number of students dislike school. Furthermore, a growing number of thinkers are criticizing conceptual, moral, and practical deficiencies of the current compulsory education paradigm (with an emphasis on the importance of freedom). However, systematic research on the structure of students’ attitudes about these fundamental issues is ...

By Ivan Knežević, Siniša Subotić

The Dark Triad of Personality includes three dimensions related to antisocial and manipulative behavior: Machiavellianism, subclinical narcissism, and subclinical psychopathy. The HEXACO personality model proposed honesty-humility as one of the basic personality dimensions, which shares a lot of variance with the Dark Triad. This research deals wit...

By Mirjana Karać

 During the development and exploitation of various technical systems, often encounter the need to we need the data pertaining to predict how these systems behave during their exploitation. This primarily relates to their technical qualities such as reliability indicators (reliability, availability, mean time between failures, failure intensit...

By Božo Ilić, Živoslav Adamović, Branko Savić

 This paper treats a priori (the reason why) ecological heating systems using boilers with complete combustion, with the main objective function of significant material cost savings and increase the level of effectiveness of the system. Burning modulated and cheapest biomass-wood bark (encrustation), and other wood waste which are directly wit...

By Бoрo Дaкић, Пaнтeлиja Дaкић, Бeсим Грoздaнић