TY  - JOUR
AU  - Topisirović, Goran
AU  - Petrović, Dragan
AU  - Maletić, Radojka
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3211
AB  - Information on the concentration of dust particles is an important microclimate parameter that characterizes the local environmental quality of each livestock building. Increased concentration of dust particles primarily affects the indoor air quality and, consequently, the animal and workers health. Among many others, ventilation rate is a vital parameter that controls the spatial distribution of airborne dust particles in livestock buildings. This was the main motive for authors of this paper to research the influence of rotation rate of under-roof axial fans (i.e. the air flow rate) on airborne dust particles distribution crossover the barn specified for tied cows breeding. During a series of performed experiments, six different air flow rates have been maintained in the range between 0 m3·h-1 and 48000 m3·h-1. Flow rate has been controlled by special electronic control unit, which provided six different rotation rates of two under-roof fans, including the neutral regime (natural ventilation only). Measurements have been performed at four typical height levels (0,5 m; 1,0 m; 1,5 m and 2,0 m), cross-over the three lateral and four longitudinal characteristic building sections. Consequently, 48 measuring points were appropriately selected, in order to cover the indoor space in adequate way. Comparative analysis of air flow velocities and dust concentrations showed that this fan setup may give satisfactory results under adequate operational regime. Certain working regimes were recommended for use, and the third rotation rate step, generating the airflow of 37300 m3·h-1 or indoor air exchange level of approximately 25 h-1, has been found as the most suitable.
AB  - Koncentracija čestica prašine je je važan mikroklimatski parametar koji karakteriše kvalitet ambijenta svakog stočarskog objekta. Povećana koncentracija prašine primarno utiče na kvalitet stajskog vazduha, a time i na zdravstveno stanje životinja i ljudi. Pored ostalih, intenzitet ventilacije je značajan parametar u kontroli prostorne raspodele koncentracija prašine u stočarskim objektima. Ovo je bio motiv autora da sprovedu istraživanje uticaja režima rada krovnih aksijalnih ventilatora (tj. intenziteta strujanja vazduha) na raspodelu koncentracija prašine u staji za vezao držanje krava. Tokom izvođenja ogleda ispitivan je uticaj šest različitih intenziteta strujanja vazduha u opsegu od 0 m3·h-1 do 48000 m3·h-1. Režimom rada ventilatora je upravljao elektronski kontrolni uređaj, kojim je određivano šest različitih brojeva obrtaja za dva krovna ventilatora, uključujući i neutralni režim (samo prirodna ventilacija). Koncentracija je merena na četiri visine (0,5 m; 1,0 m; 1,5 m i 2,0 m iznad poda), po tri poprečna i četiri podužna preseka objekta. Tako je dobijeno 48 pravilno raspoređenih mernih tačaka, koje su ravnomerno pokrivale unutrašnji prostor staje. Komparativnom analizom brzina strujanja vazduha i koncentracija prašine zaključeno je da ispitivani položaj ventilatora može da da zadovoljavajuće rezultate pri odgovarajućem režimu rada. Preporučeni su najpovoljniji radni režimi za upotrebu. Kao najpovoljniji izdvojen je treći ispitivani režim sa protokom vazduha od 37300 m3·h-1, odnosno 25 h-1 ostvarenih izmena vazduha.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Spatial distributions of airborne dust in a cows barn exposed to influence of different ventilation rates
T1  - Raspodela koncentracija prašine u vazduhu objekta za krave pri različitim režimima ventilacije
EP  - 383
IS  - 2
SP  - 373
VL  - 29
DO  - 10.2298/BAH1302373T
ER  - 

@article{
author = "Topisirović, Goran and Petrović, Dragan and Maletić, Radojka",
year = "2013",
abstract = "Information on the concentration of dust particles is an important microclimate parameter that characterizes the local environmental quality of each livestock building. Increased concentration of dust particles primarily affects the indoor air quality and, consequently, the animal and workers health. Among many others, ventilation rate is a vital parameter that controls the spatial distribution of airborne dust particles in livestock buildings. This was the main motive for authors of this paper to research the influence of rotation rate of under-roof axial fans (i.e. the air flow rate) on airborne dust particles distribution crossover the barn specified for tied cows breeding. During a series of performed experiments, six different air flow rates have been maintained in the range between 0 m3·h-1 and 48000 m3·h-1. Flow rate has been controlled by special electronic control unit, which provided six different rotation rates of two under-roof fans, including the neutral regime (natural ventilation only). Measurements have been performed at four typical height levels (0,5 m; 1,0 m; 1,5 m and 2,0 m), cross-over the three lateral and four longitudinal characteristic building sections. Consequently, 48 measuring points were appropriately selected, in order to cover the indoor space in adequate way. Comparative analysis of air flow velocities and dust concentrations showed that this fan setup may give satisfactory results under adequate operational regime. Certain working regimes were recommended for use, and the third rotation rate step, generating the airflow of 37300 m3·h-1 or indoor air exchange level of approximately 25 h-1, has been found as the most suitable., Koncentracija čestica prašine je je važan mikroklimatski parametar koji karakteriše kvalitet ambijenta svakog stočarskog objekta. Povećana koncentracija prašine primarno utiče na kvalitet stajskog vazduha, a time i na zdravstveno stanje životinja i ljudi. Pored ostalih, intenzitet ventilacije je značajan parametar u kontroli prostorne raspodele koncentracija prašine u stočarskim objektima. Ovo je bio motiv autora da sprovedu istraživanje uticaja režima rada krovnih aksijalnih ventilatora (tj. intenziteta strujanja vazduha) na raspodelu koncentracija prašine u staji za vezao držanje krava. Tokom izvođenja ogleda ispitivan je uticaj šest različitih intenziteta strujanja vazduha u opsegu od 0 m3·h-1 do 48000 m3·h-1. Režimom rada ventilatora je upravljao elektronski kontrolni uređaj, kojim je određivano šest različitih brojeva obrtaja za dva krovna ventilatora, uključujući i neutralni režim (samo prirodna ventilacija). Koncentracija je merena na četiri visine (0,5 m; 1,0 m; 1,5 m i 2,0 m iznad poda), po tri poprečna i četiri podužna preseka objekta. Tako je dobijeno 48 pravilno raspoređenih mernih tačaka, koje su ravnomerno pokrivale unutrašnji prostor staje. Komparativnom analizom brzina strujanja vazduha i koncentracija prašine zaključeno je da ispitivani položaj ventilatora može da da zadovoljavajuće rezultate pri odgovarajućem režimu rada. Preporučeni su najpovoljniji radni režimi za upotrebu. Kao najpovoljniji izdvojen je treći ispitivani režim sa protokom vazduha od 37300 m3·h-1, odnosno 25 h-1 ostvarenih izmena vazduha.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Spatial distributions of airborne dust in a cows barn exposed to influence of different ventilation rates, Raspodela koncentracija prašine u vazduhu objekta za krave pri različitim režimima ventilacije",
pages = "383-373",
number = "2",
volume = "29",
doi = "10.2298/BAH1302373T"
}

Topisirović, G., Petrović, D.,& Maletić, R.. (2013). Spatial distributions of airborne dust in a cows barn exposed to influence of different ventilation rates. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 29(2), 373-383.
https://doi.org/10.2298/BAH1302373T

Topisirović G, Petrović D, Maletić R. Spatial distributions of airborne dust in a cows barn exposed to influence of different ventilation rates. in Biotechnology in Animal Husbandry. 2013;29(2):373-383.
doi:10.2298/BAH1302373T .

Topisirović, Goran, Petrović, Dragan, Maletić, Radojka, "Spatial distributions of airborne dust in a cows barn exposed to influence of different ventilation rates" in Biotechnology in Animal Husbandry, 29, no. 2 (2013):373-383,
https://doi.org/10.2298/BAH1302373T . .

TY  - JOUR
AU  - Petrović, Dragan
AU  - Golubović, Zoran dj.
AU  - Dajić, Zora
AU  - Tomantschger, Kurt
AU  - Radojević, Rade
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2874
AB  - The plant cell walls play an important role in defining the shape and size of the plant cell, matter flow regulation, mitigation of environmental influences and achievement of homeostasis, as well as in defense and protection against pathogens in plant tissues and organs. This paper presents an original approach to the establishment of the mathematical model based upon the former study dealing with the surface nano-roughness distribution of the model cell wall. The differential equation accompanied with the appropriate additional conditions, which describes such kind of distributions, has been formulated and presented. The developed model was tested using the already reported experimental data of an artificial cell wall, made of polysaccharides based on bacterial cellulose supplemented with xyloglucan and pectin (BCPX) that imitate properties of the natural cell wall. It has been demonstrated that proposed differential equation, has an analytical solution in the form of the normal Gaussian distribution, which describes the surface roughness of cell walls made of this material accurately.
AB  - Ćelijski zidovi biljaka imaju značajnu ulogu u definisanju oblika i veličina biljnih ćelija, kao i regulaciji razmene materija, zaštiti ćelijskih tkiva i organa od patogenih klica, ublažavanje nepovoljnih uticaja okoline itd. U ovom radu je prikazan originalni pristup formiranju matematičkog modela za opisivanje raspodele površinske nano-hrapavosti veštačkog modela ćelijskog zida. Formulisana je diferencijalna jednačina sa odgovarajućim dodatnim uslovima, koja opisuje raspodele navedenog tipa Razvijeni model je testiran koristeći postojeće (objavljene) eksperimentalne podatke merenja površinske hrapavosti veštačkih model-materijala ćelijskih zidova, izrađenih od polisaharida zasnovanih na bakterijskoj celulozi oplemenjenoj ksiloglukanom i pektinom (BCPX), koji imitira svojstva prirodnih ćelijskih zidova. Potvrđeno je da predložena diferencijalna jednačina ima analitičko rešenje u formi Gausove funkcije, koja precizno opisuje hrapavost ćelijskih zidova napravljenih od ovog materijala.
PB  - Univerzitet u Nišu, Niš
T2  - Facta universitatis - series: Mechanical Engineering
T1  - Mathematical modeling the surface roughness distribution of artificial cell wall material
T1  - Matematičko modeliranje raspodele površinske hrapavosti veštačkog ćelijskog zida
EP  - 6
IS  - 1
SP  - 1
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2874
ER  - 

@article{
author = "Petrović, Dragan and Golubović, Zoran dj. and Dajić, Zora and Tomantschger, Kurt and Radojević, Rade",
year = "2012",
abstract = "The plant cell walls play an important role in defining the shape and size of the plant cell, matter flow regulation, mitigation of environmental influences and achievement of homeostasis, as well as in defense and protection against pathogens in plant tissues and organs. This paper presents an original approach to the establishment of the mathematical model based upon the former study dealing with the surface nano-roughness distribution of the model cell wall. The differential equation accompanied with the appropriate additional conditions, which describes such kind of distributions, has been formulated and presented. The developed model was tested using the already reported experimental data of an artificial cell wall, made of polysaccharides based on bacterial cellulose supplemented with xyloglucan and pectin (BCPX) that imitate properties of the natural cell wall. It has been demonstrated that proposed differential equation, has an analytical solution in the form of the normal Gaussian distribution, which describes the surface roughness of cell walls made of this material accurately., Ćelijski zidovi biljaka imaju značajnu ulogu u definisanju oblika i veličina biljnih ćelija, kao i regulaciji razmene materija, zaštiti ćelijskih tkiva i organa od patogenih klica, ublažavanje nepovoljnih uticaja okoline itd. U ovom radu je prikazan originalni pristup formiranju matematičkog modela za opisivanje raspodele površinske nano-hrapavosti veštačkog modela ćelijskog zida. Formulisana je diferencijalna jednačina sa odgovarajućim dodatnim uslovima, koja opisuje raspodele navedenog tipa Razvijeni model je testiran koristeći postojeće (objavljene) eksperimentalne podatke merenja površinske hrapavosti veštačkih model-materijala ćelijskih zidova, izrađenih od polisaharida zasnovanih na bakterijskoj celulozi oplemenjenoj ksiloglukanom i pektinom (BCPX), koji imitira svojstva prirodnih ćelijskih zidova. Potvrđeno je da predložena diferencijalna jednačina ima analitičko rešenje u formi Gausove funkcije, koja precizno opisuje hrapavost ćelijskih zidova napravljenih od ovog materijala.",
publisher = "Univerzitet u Nišu, Niš",
journal = "Facta universitatis - series: Mechanical Engineering",
title = "Mathematical modeling the surface roughness distribution of artificial cell wall material, Matematičko modeliranje raspodele površinske hrapavosti veštačkog ćelijskog zida",
pages = "6-1",
number = "1",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2874"
}

Petrović, D., Golubović, Z. dj., Dajić, Z., Tomantschger, K.,& Radojević, R.. (2012). Mathematical modeling the surface roughness distribution of artificial cell wall material. in Facta universitatis - series: Mechanical Engineering
Univerzitet u Nišu, Niš., 10(1), 1-6.
https://hdl.handle.net/21.15107/rcub_agrospace_2874

Petrović D, Golubović ZD, Dajić Z, Tomantschger K, Radojević R. Mathematical modeling the surface roughness distribution of artificial cell wall material. in Facta universitatis - series: Mechanical Engineering. 2012;10(1):1-6.
https://hdl.handle.net/21.15107/rcub_agrospace_2874 .

Petrović, Dragan, Golubović, Zoran dj., Dajić, Zora, Tomantschger, Kurt, Radojević, Rade, "Mathematical modeling the surface roughness distribution of artificial cell wall material" in Facta universitatis - series: Mechanical Engineering, 10, no. 1 (2012):1-6,
https://hdl.handle.net/21.15107/rcub_agrospace_2874 .

TY  - JOUR
AU  - Tomantschger, Kurt
AU  - Petrović, Dragan
AU  - Golubović, Zorana
AU  - Trisović, Nataša
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2944
AB  - Diatomaceous Earth, also known as diatomite, diatomaceous silica, or kieselguhr is the material of natural origin which is composed of the skeletons of diatoms, single-celled algae, which are accumulated in huge beds. Some diatomite's are industrially processed and used for different applications most frequently as filter aid. Particle size distribution of any filter granulation, composed of these materials, has to be appropriately prepared. A mathematical model of particle size distribution of a kieselguhr granulation is presented in this paper and experimentally verified. Particle sizes of a kieselguhr granulation are measured by the microscopic morphometric method, ordinarily used in the experimental microbiology, and the empirical probability density function (pdf) of particle sizes is formulated Experimental pdf data are fitted according to the exponential function, which represents a solution of a developed model of differential equation. The fitting procedure followed the iterative algorithm of Levenberg-Marquardt to adjust the parameter values. This way, an experimentally determined pdf can be approximated with an analytic function with a small number of constants in the adopted model of fit function. This approach facilitates further modeling and analysis of filtering mediums. Based on the particle sizes, pdf's of different kieselguhr, and perlite granulations, it is possible to determine an optimal medium mixture (containing different filtration granulations), depending of the filtration requirements.
PB  - Editura Stiintifica Fmr, Bucharest
T2  - Metalurgia International
T1  - Mathematical model for the particle size distribution of a kieselguhr filter granulation
EP  - 197
IS  - 10
SP  - 192
VL  - 17
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2944
ER  - 

@article{
author = "Tomantschger, Kurt and Petrović, Dragan and Golubović, Zorana and Trisović, Nataša",
year = "2012",
abstract = "Diatomaceous Earth, also known as diatomite, diatomaceous silica, or kieselguhr is the material of natural origin which is composed of the skeletons of diatoms, single-celled algae, which are accumulated in huge beds. Some diatomite's are industrially processed and used for different applications most frequently as filter aid. Particle size distribution of any filter granulation, composed of these materials, has to be appropriately prepared. A mathematical model of particle size distribution of a kieselguhr granulation is presented in this paper and experimentally verified. Particle sizes of a kieselguhr granulation are measured by the microscopic morphometric method, ordinarily used in the experimental microbiology, and the empirical probability density function (pdf) of particle sizes is formulated Experimental pdf data are fitted according to the exponential function, which represents a solution of a developed model of differential equation. The fitting procedure followed the iterative algorithm of Levenberg-Marquardt to adjust the parameter values. This way, an experimentally determined pdf can be approximated with an analytic function with a small number of constants in the adopted model of fit function. This approach facilitates further modeling and analysis of filtering mediums. Based on the particle sizes, pdf's of different kieselguhr, and perlite granulations, it is possible to determine an optimal medium mixture (containing different filtration granulations), depending of the filtration requirements.",
publisher = "Editura Stiintifica Fmr, Bucharest",
journal = "Metalurgia International",
title = "Mathematical model for the particle size distribution of a kieselguhr filter granulation",
pages = "197-192",
number = "10",
volume = "17",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2944"
}

Tomantschger, K., Petrović, D., Golubović, Z.,& Trisović, N.. (2012). Mathematical model for the particle size distribution of a kieselguhr filter granulation. in Metalurgia International
Editura Stiintifica Fmr, Bucharest., 17(10), 192-197.
https://hdl.handle.net/21.15107/rcub_agrospace_2944

Tomantschger K, Petrović D, Golubović Z, Trisović N. Mathematical model for the particle size distribution of a kieselguhr filter granulation. in Metalurgia International. 2012;17(10):192-197.
https://hdl.handle.net/21.15107/rcub_agrospace_2944 .

Tomantschger, Kurt, Petrović, Dragan, Golubović, Zorana, Trisović, Nataša, "Mathematical model for the particle size distribution of a kieselguhr filter granulation" in Metalurgia International, 17, no. 10 (2012):192-197,
https://hdl.handle.net/21.15107/rcub_agrospace_2944 .

TY  - JOUR
AU  - Petrović, Dragan
AU  - Mitrović, Caslav B.
AU  - Trisović, Nataša R.
AU  - Golubović, Zorana Z.
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2715
AB  - When filtering products with a high level of non-soluble solids and containing filtration-inhibiting substances, a variety of different filter aids can be used. Among others, kieselguhr and perlite are possible materials for this purpose. The selection of the granulation that should be applied depends on the filtered liquid medium and the desired retention level. While perlite is most commonly used for rough filtration, kieselguhr is also suitable for more subtile filtration. In the paper, particle size distributions of three kieselguhr granulations and a perlite granulation are analysed. Particle sizes are measured by the morphometric method commonly used in the microbiology. Basic statistic parameters are calculated for all considered samples and compared. The applicability of hyperbolic and log-hyperbolic functions, in describing the particles size distributions of these granulations is verified. Depending on the imposed filtration requirements, this approach enables simple modelling and composition of a wide variety of different granulations characterised by appropriate particle size distributions from a few available granulations.
PB  - Assoc Mechanical Engineers Technicians Slovenia, Ljubljana
T2  - Strojniški Vestnik-Journal of Mechanical Engineering
T1  - On the Particles Size Distributions of Diatomaceous Earth and Perlite Granulations
EP  - 850
IS  - 11
SP  - 843
VL  - 57
DO  - 10.5545/sv-jme.2010.050
ER  - 

@article{
author = "Petrović, Dragan and Mitrović, Caslav B. and Trisović, Nataša R. and Golubović, Zorana Z.",
year = "2011",
abstract = "When filtering products with a high level of non-soluble solids and containing filtration-inhibiting substances, a variety of different filter aids can be used. Among others, kieselguhr and perlite are possible materials for this purpose. The selection of the granulation that should be applied depends on the filtered liquid medium and the desired retention level. While perlite is most commonly used for rough filtration, kieselguhr is also suitable for more subtile filtration. In the paper, particle size distributions of three kieselguhr granulations and a perlite granulation are analysed. Particle sizes are measured by the morphometric method commonly used in the microbiology. Basic statistic parameters are calculated for all considered samples and compared. The applicability of hyperbolic and log-hyperbolic functions, in describing the particles size distributions of these granulations is verified. Depending on the imposed filtration requirements, this approach enables simple modelling and composition of a wide variety of different granulations characterised by appropriate particle size distributions from a few available granulations.",
publisher = "Assoc Mechanical Engineers Technicians Slovenia, Ljubljana",
journal = "Strojniški Vestnik-Journal of Mechanical Engineering",
title = "On the Particles Size Distributions of Diatomaceous Earth and Perlite Granulations",
pages = "850-843",
number = "11",
volume = "57",
doi = "10.5545/sv-jme.2010.050"
}

Petrović, D., Mitrović, C. B., Trisović, N. R.,& Golubović, Z. Z.. (2011). On the Particles Size Distributions of Diatomaceous Earth and Perlite Granulations. in Strojniški Vestnik-Journal of Mechanical Engineering
Assoc Mechanical Engineers Technicians Slovenia, Ljubljana., 57(11), 843-850.
https://doi.org/10.5545/sv-jme.2010.050

Petrović D, Mitrović CB, Trisović NR, Golubović ZZ. On the Particles Size Distributions of Diatomaceous Earth and Perlite Granulations. in Strojniški Vestnik-Journal of Mechanical Engineering. 2011;57(11):843-850.
doi:10.5545/sv-jme.2010.050 .

Petrović, Dragan, Mitrović, Caslav B., Trisović, Nataša R., Golubović, Zorana Z., "On the Particles Size Distributions of Diatomaceous Earth and Perlite Granulations" in Strojniški Vestnik-Journal of Mechanical Engineering, 57, no. 11 (2011):843-850,
https://doi.org/10.5545/sv-jme.2010.050 . .

TY  - CONF
AU  - Petrović, Dragan
AU  - Radojević, Rade
AU  - Golubović, Z.Z.
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2443
PB  - 28th Danubia-Adria-Symposium on Advances in Experimental Mechanics, DAS 2011
C3  - 28th Danubia - Adria - Symposium on Advances in Experimental Mechanics, DAS 2011
T1  - On the soil structure: Chaos and order
EP  - 300
SP  - 299
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2443
ER  - 

@conference{
author = "Petrović, Dragan and Radojević, Rade and Golubović, Z.Z.",
year = "2011",
publisher = "28th Danubia-Adria-Symposium on Advances in Experimental Mechanics, DAS 2011",
journal = "28th Danubia - Adria - Symposium on Advances in Experimental Mechanics, DAS 2011",
title = "On the soil structure: Chaos and order",
pages = "300-299",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2443"
}

Petrović, D., Radojević, R.,& Golubović, Z.Z.. (2011). On the soil structure: Chaos and order. in 28th Danubia - Adria - Symposium on Advances in Experimental Mechanics, DAS 2011
28th Danubia-Adria-Symposium on Advances in Experimental Mechanics, DAS 2011., 299-300.
https://hdl.handle.net/21.15107/rcub_agrospace_2443

Petrović D, Radojević R, Golubović Z. On the soil structure: Chaos and order. in 28th Danubia - Adria - Symposium on Advances in Experimental Mechanics, DAS 2011. 2011;:299-300.
https://hdl.handle.net/21.15107/rcub_agrospace_2443 .

Petrović, Dragan, Radojević, Rade, Golubović, Z.Z., "On the soil structure: Chaos and order" in 28th Danubia - Adria - Symposium on Advances in Experimental Mechanics, DAS 2011 (2011):299-300,
https://hdl.handle.net/21.15107/rcub_agrospace_2443 .

TY  - JOUR
AU  - Tomantschger, Kurt
AU  - Petrović, Dragan
AU  - Golubović, Zoran D.
AU  - Mileusnić, Zoran
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2434
AB  - A novel mathematical model for the tractor engine durability, based on the appropriate differential equation and conditions, is formulated and presented in this paper. Its practical applicability is experimentally verified for the tractor type Massey-Ferguson 8160. The probability density function of the engine's lifespan, as long as the overhaul is needed, is established and approximated by normal Gaussian function. Fitting coefficients are evaluated through the non-linear fitting of empirical data by Levenberg-Marquardt numerical algorithm.
T2  - African Journal of Agricultural Research
T1  - Differential equation model for durability of the tractor's engine with application to the model Massey Ferguson 8160
EP  - 4391
IS  - 18
SP  - 4385
VL  - 6
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2434
ER  - 

@article{
author = "Tomantschger, Kurt and Petrović, Dragan and Golubović, Zoran D. and Mileusnić, Zoran",
year = "2011",
abstract = "A novel mathematical model for the tractor engine durability, based on the appropriate differential equation and conditions, is formulated and presented in this paper. Its practical applicability is experimentally verified for the tractor type Massey-Ferguson 8160. The probability density function of the engine's lifespan, as long as the overhaul is needed, is established and approximated by normal Gaussian function. Fitting coefficients are evaluated through the non-linear fitting of empirical data by Levenberg-Marquardt numerical algorithm.",
journal = "African Journal of Agricultural Research",
title = "Differential equation model for durability of the tractor's engine with application to the model Massey Ferguson 8160",
pages = "4391-4385",
number = "18",
volume = "6",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2434"
}

Tomantschger, K., Petrović, D., Golubović, Z. D.,& Mileusnić, Z.. (2011). Differential equation model for durability of the tractor's engine with application to the model Massey Ferguson 8160. in African Journal of Agricultural Research, 6(18), 4385-4391.
https://hdl.handle.net/21.15107/rcub_agrospace_2434

Tomantschger K, Petrović D, Golubović ZD, Mileusnić Z. Differential equation model for durability of the tractor's engine with application to the model Massey Ferguson 8160. in African Journal of Agricultural Research. 2011;6(18):4385-4391.
https://hdl.handle.net/21.15107/rcub_agrospace_2434 .

Tomantschger, Kurt, Petrović, Dragan, Golubović, Zoran D., Mileusnić, Zoran, "Differential equation model for durability of the tractor's engine with application to the model Massey Ferguson 8160" in African Journal of Agricultural Research, 6, no. 18 (2011):4385-4391,
https://hdl.handle.net/21.15107/rcub_agrospace_2434 .

TY  - JOUR
AU  - Radojević, Rade
AU  - Petrović, Dragan
AU  - Pavlović, Vladimir
AU  - Nikolić, Zoran M.
AU  - Urošević, Mirko P.
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2408
AB  - To reach fruit market standards, quality evaluation has to be performed. Computer assisted fruit image analysis represents a technique, which offers a variety of automatic and semi-automatic procedures that can be used in combination with classic evaluation methods. To achieve this goal, a digital parameterization method for single apple fruit (Malus domestica) size, shape and surface spottiness has been recently developed. The appropriate mathematical procedures, defining the criteria for the fruit quality parameterization, are also defined and tested. The concept of the method, as well as the initial testing results, is presented in this paper. Basically, the technique combines analysis of apple fruit 256 gray-scale level images and parameterization algorithm of fruit quality. The former is based on digital pattern recognition method (DPR), and the latter employs linear fitting and numerical integration of DPR output data. This way, accurate parameterization of the fruit size, shape and surface spottiness, as well as the reliable fruit sorting according to the product quality, is enabled.
T2  - African Journal of Agricultural Research
T1  - Digital parameterization of apple fruit size, shape and surface spottiness
EP  - 3142
IS  - 13
SP  - 3131
VL  - 6
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2408
ER  - 

@article{
author = "Radojević, Rade and Petrović, Dragan and Pavlović, Vladimir and Nikolić, Zoran M. and Urošević, Mirko P.",
year = "2011",
abstract = "To reach fruit market standards, quality evaluation has to be performed. Computer assisted fruit image analysis represents a technique, which offers a variety of automatic and semi-automatic procedures that can be used in combination with classic evaluation methods. To achieve this goal, a digital parameterization method for single apple fruit (Malus domestica) size, shape and surface spottiness has been recently developed. The appropriate mathematical procedures, defining the criteria for the fruit quality parameterization, are also defined and tested. The concept of the method, as well as the initial testing results, is presented in this paper. Basically, the technique combines analysis of apple fruit 256 gray-scale level images and parameterization algorithm of fruit quality. The former is based on digital pattern recognition method (DPR), and the latter employs linear fitting and numerical integration of DPR output data. This way, accurate parameterization of the fruit size, shape and surface spottiness, as well as the reliable fruit sorting according to the product quality, is enabled.",
journal = "African Journal of Agricultural Research",
title = "Digital parameterization of apple fruit size, shape and surface spottiness",
pages = "3142-3131",
number = "13",
volume = "6",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2408"
}

Radojević, R., Petrović, D., Pavlović, V., Nikolić, Z. M.,& Urošević, M. P.. (2011). Digital parameterization of apple fruit size, shape and surface spottiness. in African Journal of Agricultural Research, 6(13), 3131-3142.
https://hdl.handle.net/21.15107/rcub_agrospace_2408

Radojević R, Petrović D, Pavlović V, Nikolić ZM, Urošević MP. Digital parameterization of apple fruit size, shape and surface spottiness. in African Journal of Agricultural Research. 2011;6(13):3131-3142.
https://hdl.handle.net/21.15107/rcub_agrospace_2408 .

Radojević, Rade, Petrović, Dragan, Pavlović, Vladimir, Nikolić, Zoran M., Urošević, Mirko P., "Digital parameterization of apple fruit size, shape and surface spottiness" in African Journal of Agricultural Research, 6, no. 13 (2011):3131-3142,
https://hdl.handle.net/21.15107/rcub_agrospace_2408 .