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As a part of reconstruction of the equipment for electrolytic refining in Mining and Metallurgy Institute Bor, a new control system was introduced. The system is based on microcontroller and PC. This system provides automatic control and timely transfer of informations about the status of all important process parameters to process operators. Supervision of the process can be performed locally, or from a remote location through a local area network or over the Internet. The control system provides automatic monitoring and recording of cell voltages, electrolyte temperatures, and automatic control of the heaters. In case of exceeding the given boundary conditions system generates alarm messages. Now, after application of the control sistem, the reliability of electrolytic refining process is improved and insight into the status of process parameters is better.

Istraživanja u ovoj doktorskoj disertaciji sprovedena su sa ciljem utvrđivanja osnovnih parametara pojave nesrećnih slucajeva sa traktorima i drugim mobilnim mašinama u Republici Srbiji, u periodu 2005-2009. godina. Prvi deo istraživanja je obuhvatio nesrećne slucajeve u javnom saobraćaju. Drugi deo se odnosi na nesreće u uslovima poljoprivredne proizvodnje. Prikupljeni podaci su obrađeni, sistematizovani i predstavljeni u formi tabela i grafikona. U obzir su uzete određene kategorije uzroka događanja nesrecnih slucajeva, tipove nesreca, godine istraživanja i posledica događanja nesrećnih slucajeva. Rezultati pokazuju da se u javnom saobraćaju, u periodu istraživanja dogodilo ukupno 6.625 nesreca od kojih je 67,1% izazvano od strane vozača traktora. Od ukupno 329 nesreća sa tragično nastradalim licima 80,85% izazavali su vozači traktora i drugih mobilnih poljoprivrednih mašina. U ukupno pomenutom broju nesreća, nastradalo je 3.761 osoba. Od 345 tragično nastradalih lica, 80,57% je tragično nastradalo u nesrecama koje su izazavali vozači-rukovaoci poljoprivredne mehanizacije. Najuticajniji uzroci nesreća su: nepropisna brzina kretanja vozila, nepropisne radnje vozilom i psihofizičko stanje vozača. Najzastupljeniji tip nesreća su sudari (1.180 slucajeva) i sletanje vozila sa puta (599 slucajeva). Kada su u pitanju nesreće koje su se desile u uslovima poljoprivredne proizvodnje, u periodu istraživanja dogodilo se ukupno 903 nesreće u kojima je nastradalo 1.070 lica (17,38% je tragično nastradalo, 15,33% poginulo). Najveći broj nesreća/nastradalih lica zabeleženo je u Zlatiborskoj, Moravickoj i Beogradskoj oblasti. Najzastupljeniji tip nesreća je prevrtanje (47,4%) traktora i/ili agregatiranih prikljucaka i drugih mobilnih poljoprivrednih mašina. Rezultati istraživanja pokazuju da su nesrece sa mobilnom poljoprivrednom mehanizacijom u Republici Srbiji veoma česta pojava. Osnovni problemi su: nedostatak obuke za pravilno korišcenje i održavanje mašina, nedovoljno poznavanje saobracajnih propisa vozaca traktora, neodgovornost i nedisciplina prilikom korišcenja traktora i poljoprivredih mašina. U ovoj disertaciji su predložene preventivne mere kojima se broj nesreca može smanjiti, uz vece poštovanje zakona iz oblasti sigurnosti rada mašina, i posebno Zakona o bezbednosti saobracaja na putevima. occurrence of accidents with tractors and other mobile machines in the Republic of Serbia in the period 2005-2009. The first part of the survey included the accidents in public transport. The second part refers to the accidents in conditions of agricultural production. The collected data were statistically analyzed, systematized and presented in the form of tables and graphs. Specific causes of accidents, types of accidents, research period and the consequences of accidental events were taken into consideration. The results show that during the period of research, in public transport it occurred 6625 accidents of which 67.1% was caused by the driver of the tractor. Of the total of 329 accidents with tragic casualties, 80.85% were the drivers of tractors and other mobile agricultural machines. The total number of casualties was 3761 persons. From 345 tragic casualties, 80.57% died in accidents that drew drivers/operators of agricultural machinery. The most influential causes of accidents were: improper speed of the vehicle, improper vehicle operations and driver impairments. The most common type of accidents was collisions (1180 cases) and run-off-the road accidents (599 cases). In the conditions of agricultural production during the research period, it has happened a total of 903 accidents in which 1070 people were killed (17.38% tragic casualties, 15.33% died). The highest number of accidents/casualties was recorded in Zlatibor, Morava and the Belgrade area. The most common type of accident is tumbling of the tractor and/or aggregated implements and other mobile agricultural machines (47.4%). The results show that accidents with the mobile agricultural machinery in the Republic of Serbia are very common. The basic problems are: lack of training for the proper use and maintenance of machinery, tractor driver’s lack of knowledge of traffic regulations, irresponsibility and lack of discipline in the use of tractors and agricultural machinery. The main conclusion of this dissertation is that, preventive measures along with the greater respect of the law in the area of safe operation of machinery and the law on road traffic safety can reduce the number of accidents.

Application of metalworking fluids (MWF) in metalworking processes generates MWF aerosol/mist. Chronic exposure to this aerosol can cause serious health problems to workers such as asthma, lipoid pneumonia, dermatitis, cancer. In this paper behavior of MWF aerosol was investigated. The investigation was done in the pipe, which simulates ventilation system. The aerosol generated from 6 % O/W emulsion was investigated, as well as aerosol generated from water. SHP and water aerosol were generated by laboratory aerosol generator. Behavior of aerosol under four different air velocities was investigated. The aerosol properties were measured by optical particle size analyzer. The obtained results should be of great help for designing filters for mist separation in order to protect workers and the environment.