3 research outputs found
Uticaj potencijalnih vuÄnih karakteristika traktora Fendt u optimizaciji obrade zemljiÅ”ta
Trend development of agricultural tractors, follows agrotechnique and to the general development of technique, that fundamental investigations find their full application in the world manufacturing of tractors also. This paper analyses the potential performance of a tractor Fendt production and their impact on the optimization of agricultural conditions in the processing of agricultural land in Serbia. Fendt tractors manufacturing have all the characteristics of contemporary world of tractors based on the basis of increasing engine power while keeping intact mass of the tractor in the individual series. Comprehensive analysis of Fendt tractors is made of several approaches, the three series of tractors from 700, 800 and 900, and one of these results is shown in this paper. Based on the analysis it can be concluded that the particular batch of tractors complement each other in relation to the demands of agricultural technology and farm size, which provide optimum conditions for processing various types of soil in accordance with the requirements of modern production agriculture. Such an approach to the analysis of potential impact on the optimization of processing characteristics of the soil, allows potential buyers relief decision to buy the tractor, depending on their requirements.Trend razvoja poljoprivrednih traktora prati agrotehniÄki i opÅ”ti razvoj tehnike, tako da fundamentalna istraživanja nalaze punu primenu i u svetskoj proizvodnji traktora. U radu su analizirane potencijalne eksploatacione karakteristike traktora proizvodnje Fendt i njihov uticaj na optimizaciju agrotehniÄkih uslova u obradi poljoprivrednog zemljiÅ”ta Srbije. Traktori proizvodnje Fendt imaju sve karakteristike savremenih svetskih traktora koje se zasnivaju na bazi poveÄanja snage motora uz zadržavanje nepromenjene mase traktora u okviru pojedinih serija. Sveobuhvatna analiza traktora Fendt je izvrÅ”ena od viÅ”e raspoloživih modela, na tri traktora iz serija 700, 800 i 900, a jedan deo tih rezultata, prikazan je u ovom radu. Na osnovu izvrÅ”ene analize nameÄe se zakljuÄak, da se pojedine serije traktora meÄusobno dopunjuju u odnosu na zahteve agrotehnike i veliÄinu poseda, Äime se obezbeÄuju uslovi za optimalnu obradu razliÄitih tipova zemljiÅ”ta u skladu sa zahtevima proizvodnje savremene poljoprivrede. Takav pristup analizi uticaja potencijalnih karakteristika na optimizaciju obrade zemljiÅ”ta, omoguÄava potencijalnim kupcima olakÅ”anje odluke o kupovini traktora u zavisnosti od njihovih zahteva
Potencijalne vuÄne karakteristike i racionalnost primene traktora Fendt u agrotehniÄkim uslovima
The paper analyze the potential performance of Fendt tractors and their rationality in agro-technical conditions of agriculture in Serbia. Fendt tractors have all the characteristics of contemporary tractors, based on increasing engine power and constant mass of the tractor series. Comprehensive analysis of Fendt tractors was performed on 39 different models of tractors from the series 200, 300, 400, 500, 700, 800 and 900, of which only a section of the first three series of tractors is shown in this paper. Based on the analysis, it can be concluded that the particular tractor seroes complement each other in relation to demands of agricultural technology and farm size, which enables rational and cost effective agricultural production. For practical utilization is important applied methodology of which is the scientific way of connecting the energy needs for the application of modern agricultural technology and rationality of a traction-energy potential of the tractor.U radu su analizirane potencijalne eksploatacione karakteristike traktora proizvodnje Fendt i njihova racionalnost u agrotehniÄkim uslovima poljoprivrede Srbije. Traktori proizvodnje Fendt imaju sve karakteristike savremenih traktora koje se zasnivaju na bazi poveÄanja snage motora uz zadržavanje nepromenjene mase traktora u okviru pojedinih serija. Sveobuhvatna analiza traktora Fendt je izvrÅ”ena na 39 razliÄitih modela traktora iz serija 200, 300 400, 500, 700, 800 i 900, od kojih je samo deo rezultata serije prva tri traktora prikazan u ovom radu. Na osnovu analiza nameÄe se zakljuÄak da se pojedine serije traktora meÄusobno dopunjuju u odnosu na zahteve agrotehnike i veliÄinu poseda, Äime se obezbeÄuju uslovi za racionalnu i ekonomiÄnu poljoprivrednu proizvodnju. Za praksu je znaÄajan primenjeni metod rada koji predstavlja nauÄni put povezivanja energetskih potreba za primenu savremene agrotehnike i racionalnost vuÄno-energetskog potencijala traktora
Stres na radu i zdravlje medicinskih sestara u jedinicama intenzivne njege u Srbiji
The aim of this study was to identify and analyse professional stressors, evaluate the level of stress in nurses in Intensive Care Units (ICU), and assess the correlation between the perception of stress and psychological and somatic symptoms or diseases shown by nurses. The research, designed as a crosssectional study, was carried out in the Intensive Care Units (ICU), in health centres in Serbia. The sample population encompassed 1000 nurses. Expanded Nursing Stress Scale (ENSS) was used as the research instrument. ENSS revealed a valid metric characteristic within our sample population. Nurses from ICUs rated situations involving physical and psychological working environments as the most stressful ones, whereas situations related to social working environment were described as less stressful; however, the differences in the perception of stressfulness of these environments were minor. Socio-demographic determinants of the participants (age, marital status and education level) significantly affected the perception of stress at work. Significant differences in the perception of stressfulness of particular stress factors were observed among nurses with respect to psychological and somatic symptoms (such as headache, insomnia, fatigue, despair, lower back pain, mood swings etc.) and certain diseases (such as hypertension, myocardial infarction, stroke, diabetes mellitus etc). In view of permanent escalation of professional stressors, creating a supportive working environment is essential for positive health outcomes, prevention of job-related diseases and better protection of already ill nurses.Cilj je ovoga rada bio identifi cirati i analizirati profesionalne stresore, procijeniti razinu stresa kod medicinskih sestara u jedinicama intenzivne njege te procijeniti korelaciju izmeÄu percepcije stresa i prisutnosti psiholoÅ”kih i somatskih simptoma ili bolesti kod medicinskih sestara. Istraživanje je provedeno u obliku studije presjeka u Jedinicama intenzivne njege u zdravstvenim centrima u Srbiji. Uzorak se sastojao od 1000 medicinskih sestara-tehniÄara. Za procjenu i analizu profesionalnih stresora koriÅ”ten je upitnik Expanded Nursing Stress Scale (ENSS), koji je pokazao validne metrijske karakteristike na naÅ”oj ispitanoj populaciji. Medicinske sestre u Jedinicama intenzivne njege ocijenile su situacije iz fiziÄkoga i psiholoÅ”koga radnog okruženja kao izrazito optereÄujuÄe, a situacije iz socijalnoga radnog okruženja kao manje optereÄujuÄe. Razlika u percepciji stresogenosti navedenih radnih okruženja nije bila statistiÄki znaÄajna. Sociodemografske determinante ispitanika (dob, braÄno stanje i stupanj obrazovanja) znaÄajno utjeÄu na percepciju stresa na radnom mjestu. UtvrÄena je statistiÄki znaÄajna razlika u opažanju stresogenosti pojedinih stresnih situacija na radnom mjestu izmeÄu medicinskih sestara u odnosu na postojanje psihosomatskih simptoma (kao Å”to su glavobolja, nesanica, umor, oÄaj, bol u leÄima, Äeste promjene raspoloženja) ili odreÄenih bolesti (kao Å”to su poviÅ”ena hipertenzija, infarkt miokarda, cerebrovaskularni inzult, Å”eÄerna bolest). Zbog sve izraženije prisutnosti profesionalnih stresora nužno je poduzeti odreÄene strateÅ”ke mjere kod medicinskih sestara u Jedinicama intenzivne njege. StrateÅ”ke mjere podrazumijevaju unaprjeÄenje psihosocijalne radne klime, Å”to bi unaprijedilo njihovo zdravlje i sprijeÄilo nastanak bolesti u svezi s radom, ali i omoguÄilo bolju zaÅ”titu veÄ oboljelim medicinskim sestrama