316 research outputs found

    Analysis of requirements and the necessary investments in the railway station adjustment program for persons with special needs

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    People with special needs from the standpoint of social communities have specific requirements for access, mobility, entry and exit of railway vehicles designated to transport passengers. The EU has defined standards and requirements related to persons with special needs. The aim of this paper is to analyze the technical requirements of equipment and identify the necessary investment funds related to the increasing mobility of persons with special needs in the rail transportation system. This analysis would be one of the initial steps approaching the conditions and requirements that apply in the EU in adapting the system of transport for people with special needs

    COMPARISON OF LINEAR AND NONLINEAR STATISTICS METHODS APPLIED IN INDUSTRIAL PROCESS MODELING PROCEDURE

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    This paper presents the comparison of Multiple Linear Regression Analysis (MLRA) and Artificial Neural Networks (ANN) as the statistical analysis tools. Most influential statistical parameters for choosing right modeling tool are evaluated in this investigation. Investigation was performed on real statistical data set obtained after measurements of the process parameters underindustrial conditions

    Some Types of Introductory Formulas in Greek Klephtic (Heroic) Epic

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    Certain types of introductory formulas typical of klephtic epic songs are synoptically demonstrated and analyzed. The introduction outlines the historical development of this category of folk songs, based on occasionally opposing views of literary historians and scholars concerned with the study of Greek folklore. The analysis, performed on a selected corpus of Greek klephtic epic songs, reveals basic structural principles that the anonymous folk singer abided by whilst composing these songs

    TECHNOLOGICAL PROCESS MODELING AIMING TO IMPROVE ITS OPERATIONS MANAGEMENT

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    This paper presents the modeling procedure of one real technological system. In this study, thecopper extraction from the copper flotation waste generated at the Bor Copper Mine (Serbia), werethe object of modeling. Sufficient data base for statistical modeling was constructed using theorthogonal factorial design of the experiments. Mathematical model of investigated system wasdeveloped using the combination of linear and multiple linear statistical analysis approach. Thepurpose of such a model is obtaining optimal states of the system that enable efficient operationsmanagement. Besides technological and economical, ecological parameters of the process wereconsidered as crucial input variables

    Serbia: Another endemic region for canine ocular thelaziosis

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    Canine thelaziosis is widely distributed in Far Eastern countries and considered endemic in many European countries, between latitudes 39 and 46 N. Because of the unique relationship between the causer and its intermediate and final hosts, the genus Thelazia is one of the most specialized nematodes in the taxon. Thelazia callipaeda (superfamily: Thelazioidea) infects the conjunctivas of several mammalians, including dogs and humans. Since dogs may also represent a reservoir of infection for humans, the aim of the study was to show the epidemiological situation of thelaziosis in dogs in the Republic of Serbia, after it was first diagnosed in 2014, which is crucial for the successful treatment, control, and prevention of the disease. The research was performed on privately owned dogs in the period from the end of April 2013 to the end of October 2015 in 7 different regions in Serbia. Adult parasites were mechanically removed from dogs with manifested ocular disorders, and thelaziosis was diagnosed in 178 out of 501 animals. The high prevalence of T. callipaeda in dogs (35.52%) in the analyzed areas of Serbia indicates the endemicity of eyeworm infestation in these areas

    State and ways further development in cheesemaking

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    IzvrÅ”ena je sažeta analiza stanja industrijskog sirarstva u naÅ”oj zemlji i predviđanja daljih pravaca razvoja. Utvrđeno je da je naÅ”e sirarstvo postiglo relativno visok stepen razvoja i pored toga Å”to u naÅ”oj zemlji nisu reÅ”eni neki osnovni uvjeti, kao Å”to su: količina i kvaliteta mlijeka, proizvodnja proteolitičkih fermenata za koagulaciju mlijeka, neke čiste kulture mikroorganizama i dr. Najbolji rezultati postižu se u specijaliziranim sirarskim pogonima. U daljem razvoju veću pažnju treba posvetiti istraživanju mogućnosti za industrijsku proizvodnju renomiranih domaćih vrsta sireva i povećanju rentabilnosti sirarske proizvodnje kroz veće iskoriÅ”tavanje sastojaka mlijeka posredstvom ultrafiltracije i obrazovanja koagregata. Analizirane su prednosti i nedostaci ovih postupaka i postignuti rezultati u naÅ”oj zemlji.A concise analysis was made, concerning the state of industrial cheese making production in our country as well as the concept of further ways oj development. It has been stated that cheesemaking in our country has achieved a relatively high degree of development, in spite of basic problems in this^ industry that have not been solved, for example: the quantity and the quality of milk, the production of proteolitic enzimes for milk coagulation, microbiological culture problems and some other problems. The best results have been obtained in the specialized cheese making factories. In further development of cheesemaking more attention should be paid to searching the possibilities for industrial production of some renowned autochthonic cheese varieties, as well as to the improvement of cheese manufacture economics. The latter can be achieved by greater incorporation of milk components into cheese using the ultrafiltration process or the formation of protein coagregates, with subsequent coagulation. Advantages and disadvantages of these procedures, as well as the attained results in resolving the encountered problems in Yugoslavia, have been analyzed

    AUTOMATIC DETERMINATION OF FILTER COEFFICIENTS FOR LOCAL CONTRAST ENHANCEMENT

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    This study proposes an algorithm whose main advantage is in enabling the automatic determination of non-linear homomorphic filter coefficients used for local contrast enhancement in digital image processing. The presented algorithm is tested in a real production environment. The obtained results are compared with relevant examples in literature, showing the advantages of the achieved results or a relatively high level of their correspondence with reference results. The proposed procedure can be used for various applications in mechatronics, robotics and automatized production systems

    Neonatal outcome following exposure to organophosphorous pesticides

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    The aim of our study was to determine the neonatal outcome in mothers and children exposed to organophosphorous pesticides (OP). We found that 22.4% pregnant women were exposed to organophosphorous pesticides. OP pesticide concentration was higher in breast milk, newborn sera than maternal sera. Newborn parameters such as birth weight, birth length, head circumference, Apgar score and presence of meconium, as well as gestational age of delivery, showed no significant difference between the two groups. However, postpartum weight loss, hospitalization duration, levels of newborn bilirubin and glycaemia differed significantly between the two groups. Morbidity and presence of CNS disorders were six times and more than twelve times higher, respectively, in the OP-exposed than in the OP pesticide non-exposed group

    Trace and major element pollution originating from coal ash suspension and transport processes

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    Coal ash obtained by coal combustion in the ā€œNikola Tesla Aā€ power plant in Obrenovac, near Belgrade, Yugoslavia, is mixed with water of the Sava river and transported to the dump. In order to assess pollution caused by leaching of some minor and major elements during ash transport through the pipeline, two sets of samples (six samples each) were subjected to a modified sequential extraction. The first set consisted of coal ash samples taken immediately after combustion, while the second set was obtained by extraction with river water, imitating the processes that occur in the pipeline. Samples were extracted consecutively with distilled water and a 1 M solution of KCl, pH 7, and the differences in extractability were compared in order to predict potential pollution. Considering concentrations of seven trace elements as well as five major elements in extracts from a total of 12 samples, it can be concluded that lead and cadmium do not present an environmental threat during and immediately after ash transport to the dump. Portions of zinc, nickel and chromium are released during the ash transport, and arsenic and manganese are released continuously. Copper and iron do not present an environmental threat due to element leaching during and immediately after the coal ash suspension and transport. On the contrary, these elements, as well as chromium, become concentrated during coal ash transport. Adsorbed portions of calcium, magnesium and potassium are also leached during coal ash transport

    Measurement of electroweak production of a W boson in association with two jets in protonā€“proton collisions at āˆšs=13Te

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    A measurement is presented of electroweak (EW) production of a W boson in association with two jets in protonā€“proton collisions at s=13Te. The data sample was recorded by the CMS Collaboration at the LHC and corresponds to an integrated luminosity of 35.9fb-1. The measurement is performed for the ā„“Ī½jj final state (with ā„“Ī½ indicating a leptonā€“neutrino pair, and j representing the quarks produced in the hard interaction) in a kinematic region defined by invariant mass mjj>120Ge and transverse momenta pTj>25Ge. The cross section of the process is measured in the electron and muon channels yielding ĻƒEW(Wjj)=6.23Ā±0.12(stat)Ā±0.61(syst)pb per channel, in agreement with leading-order standard model predictions. The additional hadronic activity of events in a signal-enriched region is studied, and the measurements are compared with predictions. The final state is also used to perform a search for anomalous trilinear gauge couplings. Limits on anomalous trilinear gauge couplings associated with dimension-six operators are given in the framework of an effective field theory. The corresponding 95% confidence level intervals are -2.3<cWWW/Ī›2<2.5Te-2, -8.8<cW/Ī›2<16Te-2, and -45<cB/Ī›2<46Te-2. These results are combined with the CMS EW Zjj analysis, yielding the constraint on the cW W W coupling: -1.8<cWWW/Ī›2<2.0Te-2
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