Stark broadening parameters, full width at half maximum of s pectral line and shift, have been calculated for 3 spectral lines of Ar VII, for broadening by electron, proton, and He III impacts. For calculations, the semiclassical perturbation approach in the impact approximation has been used. The results are provided for temperatures from 20 000 K to 500 000 K and for an electron density of 10 17 cm -3 . Obtained results will be included in the STARK-B database which is also included in Virtual atomic and molecular data center (VAMDC).
{"title":"On the stark broadening of Ar VII spectral lines","authors":"M. Dimitrijević, S. Sahal-Bréchot","doi":"10.5937/UNIVTHO7-13884","DOIUrl":"https://doi.org/10.5937/UNIVTHO7-13884","url":null,"abstract":"Stark broadening parameters, full width at half maximum of s pectral line and shift, have been calculated for 3 spectral lines of Ar VII, for broadening by electron, proton, and He III impacts. For calculations, the semiclassical perturbation approach in the impact approximation has been used. The results are provided for temperatures from 20 000 K to 500 000 K and for an electron density of 10 17 cm -3 . Obtained results will be included in the STARK-B database which is also included in Virtual atomic and molecular data center (VAMDC).","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"7 1","pages":"46-50"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71153302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Marković, S. Panic, B. Jaksic, P. Spalevic, Marko Smilic
{"title":"Analysis of the influence of communication parameters of FSO channels on the reception quality","authors":"A. Marković, S. Panic, B. Jaksic, P. Spalevic, Marko Smilic","doi":"10.5937/UNIVTHO7-14156","DOIUrl":"https://doi.org/10.5937/UNIVTHO7-14156","url":null,"abstract":"","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"7 1","pages":"32-35"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71153362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Jaksic, Ivana Milošević, M. Petrovic, S. Ilic, S. Bojanic, Selena Vasić
This paper describes the working principle of hybrid broadcast-broadband TV (Hybrid Broadcast Broadband TV HbbTV). The architecture of HbbTV system is given, the principle of its operation, as well as an overview of HbbTV specification standards that are in use, with their basic char acteristics. Here are described the services provided by Hybrid TV. It is also provided an overview of the distribution of HbbTV services in Europe in terms of the number of TV channels that HbbTV services offer, the number of active hybrid TV devices, HbbTV standards which are in use and models of broadcast networks used to distribute HbbTV service .
{"title":"Characteristics of hybrid broadcast broadband television (HbbTV)","authors":"B. Jaksic, Ivana Milošević, M. Petrovic, S. Ilic, S. Bojanic, Selena Vasić","doi":"10.5937/UNIVTHO7-14347","DOIUrl":"https://doi.org/10.5937/UNIVTHO7-14347","url":null,"abstract":"This paper describes the working principle of hybrid broadcast-broadband TV (Hybrid Broadcast Broadband TV HbbTV). The architecture of HbbTV system is given, the principle of its operation, as well as an overview of HbbTV specification standards that are in use, with their basic char acteristics. Here are described the services provided by Hybrid TV. It is also provided an overview of the distribution of HbbTV services in Europe in terms of the number of TV channels that HbbTV services offer, the number of active hybrid TV devices, HbbTV standards which are in use and models of broadcast networks used to distribute HbbTV service .","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"7 1","pages":"36-40"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71153516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Kuzmanovic, M. Stojanovic-Krasic, A. Mančić, B. Drljača, M. Stepić
In this paper, the light beam propagation through one-dimensional photonic lattice, possessing one nonlinear defect and one linear defect, has been investigated numerically. Different dynamical regimes have been identified in terms of the distance between the two defects, position of the incident light beam, the width of linear defect, the values of nonlinearity and presence of the transverse kick. Strong localized modes on the defects, breathing and zig-zag modes in the area between defects have been observed. It has been concluded that the width of the linear defect placed next to the nonlinear one influences localization of the beam at the nonlinear waveguide. On the other hand, the nonlinear defect, regardless of the values of nonlinearity, have a small influence on the beam propagation in photonic lattice. It has been observed that the transverse kick of the initial beam leads to the distortion of localized structures. By launching the light beam towards defects, the reflection of light has been noticed. Presented results can be useful for different applications, such as blocking, filtering and routing of light beam through optical media.
{"title":"THE INFLUENCE OF NONLINEAR AND LINEAR DEFECTS ON THE LIGHT PROPAGATION THROUGH LINEAR ONE-DIMENSIONAL PHOTONIC LATTICE","authors":"S. Kuzmanovic, M. Stojanovic-Krasic, A. Mančić, B. Drljača, M. Stepić","doi":"10.5937/univtho6-12670","DOIUrl":"https://doi.org/10.5937/univtho6-12670","url":null,"abstract":"In this paper, the light beam propagation through one-dimensional photonic lattice, possessing one nonlinear defect and one linear defect, has been investigated numerically. Different dynamical regimes have been identified in terms of the distance between the two defects, position of the incident light beam, the width of linear defect, the values of nonlinearity and presence of the transverse kick. Strong localized modes on the defects, breathing and zig-zag modes in the area between defects have been observed. It has been concluded that the width of the linear defect placed next to the nonlinear one influences localization of the beam at the nonlinear waveguide. On the other hand, the nonlinear defect, regardless of the values of nonlinearity, have a small influence on the beam propagation in photonic lattice. It has been observed that the transverse kick of the initial beam leads to the distortion of localized structures. By launching the light beam towards defects, the reflection of light has been noticed. Presented results can be useful for different applications, such as blocking, filtering and routing of light beam through optical media.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"2021 1","pages":"61-66"},"PeriodicalIF":0.0,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71153044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Development and application of a simple, fast, green analytical kinetic method for the determination of micro-amounts of gold(III ) ions, were presented in this paper. The method was based on the inhibitory effect of traces of Au(III) ions on the redox reaction between disodium- 6 -hydroxy- 5 -[( 4 -sulfophenyl)azo]- 2 -naphtalenesulfonate (artificial azo-dye "Sunset Yellow FCF", E110 in further text selected as SY ) and hydrogen-peroxide, in alkaline media of borate buffer. All experimental parameters affecting to the determination: reagent concentrations, pH and temperature were in v estigated and optimised. Working experimental conditions are set according to the highest sensitivity of the proposed kinetic method for the determination of Au(III) ions. The linearity of the method was obtained within the range 1.97-59.07 μg/mL of Au(III) ions with relative standard deviation of 3.66- 0.43 %, respectively. The influence by possible interference effects by major ions on the determination of Au(III) and their limits are investigated, at the constant Au(III) concentration of 39.39 μg/mL. The results of Au(III) determination in samples obtained by proposed kinetic method and comparative ICP-OES method were statistically agreeable. Obtained results for Au(III) determination in analyzed samples, as well as the development and validation of the proposed analytical procedure have given and discussed.
{"title":"Kinetic determination of gold (III) based on its inhibitory effect in oxidizing homogenous reaction system","authors":"R. Micić, S. Mitić, R. Simonović, D. Sejmanović","doi":"10.5937/UNIVTHO6-11894","DOIUrl":"https://doi.org/10.5937/UNIVTHO6-11894","url":null,"abstract":"Development and application of a simple, fast, green analytical kinetic method for the determination of micro-amounts of gold(III ) ions, were presented in this paper. The method was based on the inhibitory effect of traces of Au(III) ions on the redox reaction between disodium- 6 -hydroxy- 5 -[( 4 -sulfophenyl)azo]- 2 -naphtalenesulfonate (artificial azo-dye \"Sunset Yellow FCF\", E110 in further text selected as SY ) and hydrogen-peroxide, in alkaline media of borate buffer. All experimental parameters affecting to the determination: reagent concentrations, pH and temperature were in v estigated and optimised. Working experimental conditions are set according to the highest sensitivity of the proposed kinetic method for the determination of Au(III) ions. The linearity of the method was obtained within the range 1.97-59.07 μg/mL of Au(III) ions with relative standard deviation of 3.66- 0.43 %, respectively. The influence by possible interference effects by major ions on the determination of Au(III) and their limits are investigated, at the constant Au(III) concentration of 39.39 μg/mL. The results of Au(III) determination in samples obtained by proposed kinetic method and comparative ICP-OES method were statistically agreeable. Obtained results for Au(III) determination in analyzed samples, as well as the development and validation of the proposed analytical procedure have given and discussed.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"6 1","pages":"11-16"},"PeriodicalIF":0.0,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71152869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The settlements along the administrative line in Serbia towards Kosovo and Metohija had a very turbulent demographic changes in the past. These changes have influenced the present. In this paper we investigated the depopulation process of this area which is intensified with the political instability, social and economic changes. The main goal of this research was to analyze the causes and effects in the reduction of the number of inhabitants, as well as the possibility of revitalizing the rural settlements of a given area. To obtain the desired results, we analyzed the existing literature and statistical data, used comparative and historical methods as well as implemented the field surveys. The application of the SWOT analysis to the researched area have showed us the strength, weakness, opportunities, and threats that can effect the process of revitalization of the village.
{"title":"CONTEMPORARY DEMOGRAPHIC CHANGES IN SETELLMENTS ALONG THE ADMINISTRATIVE LINE IN SERBIA TOWARDS AUTONOMOUS PROVINCE OF KOSOVO AND METOHIJA","authors":"D. Vukoičić, Milena Nikolić, J. Raičević","doi":"10.5937/UNIVTHO6-12758","DOIUrl":"https://doi.org/10.5937/UNIVTHO6-12758","url":null,"abstract":"The settlements along the administrative line in Serbia towards Kosovo and Metohija had a very turbulent demographic changes in the past. These changes have influenced the present. In this paper we investigated the depopulation process of this area which is intensified with the political instability, social and economic changes. The main goal of this research was to analyze the causes and effects in the reduction of the number of inhabitants, as well as the possibility of revitalizing the rural settlements of a given area. To obtain the desired results, we analyzed the existing literature and statistical data, used comparative and historical methods as well as implemented the field surveys. The application of the SWOT analysis to the researched area have showed us the strength, weakness, opportunities, and threats that can effect the process of revitalization of the village.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"6 1","pages":"17-26"},"PeriodicalIF":0.0,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71153063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper we present an assessment of the altitude effect on the plant species presence in different plant communities – the species of Juniperus genus ( Juniperus communis L., Juniperus oxycedrus L. and Juniperus sibirica Burgsdorf) on Kopaonik Mountain. Two juniper species ( Juniperus communis and Juniperus oxycedrus ) were recorded at altitudes ranging from 420 m to 1420 m, while the third species Juniperus sibirica was found at an altitude of 2100 m. It was determined that the plant communities with the presence of species of the Juniperus genus differ in botanical terms at different altitudes. It was found that there are plant species in certain communities that are present only at some altitudes, while others were present at almost all altitudes. The species of Hypericum perforatum L. is recorded in all of plant communities surveyed that proves its best adaptation to the conditions at different altitudes.
{"title":"THE EFFECT OF ALTITUTDE ON THE PRESENCE OF PLANT SPECIES IN STANDS FOR JUNIPERUS L. PLANT SPECIES ON KOPAONIK","authors":"P. Vasić, T. Jakšić, N. Djukić","doi":"10.5937/UNIVTHO6-12389","DOIUrl":"https://doi.org/10.5937/UNIVTHO6-12389","url":null,"abstract":"In this paper we present an assessment of the altitude effect on the plant species presence in different plant communities – the species of Juniperus genus ( Juniperus communis L., Juniperus oxycedrus L. and Juniperus sibirica Burgsdorf) on Kopaonik Mountain. Two juniper species ( Juniperus communis and Juniperus oxycedrus ) were recorded at altitudes ranging from 420 m to 1420 m, while the third species Juniperus sibirica was found at an altitude of 2100 m. It was determined that the plant communities with the presence of species of the Juniperus genus differ in botanical terms at different altitudes. It was found that there are plant species in certain communities that are present only at some altitudes, while others were present at almost all altitudes. The species of Hypericum perforatum L. is recorded in all of plant communities surveyed that proves its best adaptation to the conditions at different altitudes.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"6 1","pages":"5-10"},"PeriodicalIF":0.0,"publicationDate":"2016-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71152972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marko Smilic, S. Panic, Milan S. Savic, P. Spalevic, Dejan N. Milic
In this paper, HK statistical model is considered. The application of HK distribution in modeling atmospheric turbulence channel under the influence of strong and weak turbulences and all irradiance fluctuations are discussed. Expression for atmospherics turbulence channel model, pointing error models and path loss are given. Probability density functions (PDF) for both pointing error models (zero boresight and nonzero boresight) are calculated and graphically represented. Also, average bit-error-rate (BER) for zero boresight pointing error and nonzero boresight pointing error are calculated and graphically represented. Closed form expression for PDF and BER are given. Impact of zero boresight pointing error and nonzero boresight pointing error on transmission over atmospheric turbulence channel in FSO system is explained.
{"title":"HK distribution model for atmospheric turbulence channel under the influence of pointing errors","authors":"Marko Smilic, S. Panic, Milan S. Savic, P. Spalevic, Dejan N. Milic","doi":"10.5937/univtho6-12480","DOIUrl":"https://doi.org/10.5937/univtho6-12480","url":null,"abstract":"In this paper, HK statistical model is considered. The application of HK distribution in modeling atmospheric turbulence channel under the influence of strong and weak turbulences and all irradiance fluctuations are discussed. Expression for atmospherics turbulence channel model, pointing error models and path loss are given. Probability density functions (PDF) for both pointing error models (zero boresight and nonzero boresight) are calculated and graphically represented. Also, average bit-error-rate (BER) for zero boresight pointing error and nonzero boresight pointing error are calculated and graphically represented. Closed form expression for PDF and BER are given. Impact of zero boresight pointing error and nonzero boresight pointing error on transmission over atmospheric turbulence channel in FSO system is explained.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"6 1","pages":"27-31"},"PeriodicalIF":0.0,"publicationDate":"2016-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71152580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The study of complex differential equations in recent years has opened up some of questions concerning the determination of the frequency of zero solutions, the distribution of zero, oscillation of the solution, asymptotic behavior, rank growth and so on. Besides, this is solved by only some classes of differential equations. In this paper, our aim was to determine the number of zeros and their arrangement in the first quadrant, for the complex canonical differential equation of the second order. The accuracy of our results, we illustrate with two examples .
{"title":"THE NUMBER OF ZERO SOLUTIONS FOR COMPLEX CANONICAL DIFFERENTIAL EQUATION OF SECOND ORDER WITH CONSTANT COEFFICIENTS IN THE FIRST QUADRANT","authors":"Jelena Vujaković, M. Rajović","doi":"10.5937/univtho6-11621","DOIUrl":"https://doi.org/10.5937/univtho6-11621","url":null,"abstract":"The study of complex differential equations in recent years has opened up some of questions concerning the determination of the frequency of zero solutions, the distribution of zero, oscillation of the solution, asymptotic behavior, rank growth and so on. Besides, this is solved by only some classes of differential equations. In this paper, our aim was to determine the number of zeros and their arrangement in the first quadrant, for the complex canonical differential equation of the second order. The accuracy of our results, we illustrate with two examples .","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"60 1","pages":"41-46"},"PeriodicalIF":0.0,"publicationDate":"2016-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71152999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper we investigated possible potential solar area on Toplica region based on GIS (Geographical Information system) and using a special kriging method with the help of open sources GIS software Quantum GIS. This kriging method is very special to vectorized and calculated the small area. The statistical approach calculated between datasets of three meteorological stations (Nis, Prokuplje, Kursumlija). Data using of insolation from that meteorological stations from the period of (1953-2013) is useful for a solution to calculating solar potential. The also used parameter is hypsometry of relief of the whole area of Toplica region. Area of Toplica region is 2.231 km 2 with a population of 90600 citizens. Divided into fourth municipalities (Prokuplje, Žitoradja, Black, Kursumlija). The GIS modeling indicates that ideal areas for solar development are located the potential places in Toplica region. Only 13.6 km 2 of the head model scores that were in the 90-100% range. However, given the statewide high insolation values with minimal variance, solar projects may be better suited for small-scale residential or commercial projects.
本文基于地理信息系统(GIS)，在开源GIS软件Quantum GIS的帮助下，采用一种特殊的克里格方法对Toplica地区可能的潜在太阳面积进行了研究。这种克里金方法对小面积矢量化和计算具有特殊的意义。统计方法在Nis、Prokuplje、Kursumlija三个气象站的数据集之间进行计算。使用该气象站1953-2013年期间的日照数据对计算太阳势的解决方案是有用的。另一个使用的参数是Toplica区域的整个区域的地形假设。托普利察地区面积为2.231平方公里，人口为90600人。分为四个市(Prokuplje， Žitoradja, Black, Kursumlija)。GIS建模表明，理想的太阳能开发区域位于Toplica地区的潜在地点。只有13.6 km 2的头部模型得分在90-100%的范围内。然而，考虑到全州的高日照值和最小的变化，太阳能项目可能更适合小规模的住宅或商业项目。
{"title":"GIS modelling of solar potential in Toplica region","authors":"A. Valjarević","doi":"10.5937/UNIVTHO6-10739","DOIUrl":"https://doi.org/10.5937/UNIVTHO6-10739","url":null,"abstract":"In this paper we investigated possible potential solar area on Toplica region based on GIS (Geographical Information system) and using a special kriging method with the help of open sources GIS software Quantum GIS. This kriging method is very special to vectorized and calculated the small area. The statistical approach calculated between datasets of three meteorological stations (Nis, Prokuplje, Kursumlija). Data using of insolation from that meteorological stations from the period of (1953-2013) is useful for a solution to calculating solar potential. The also used parameter is hypsometry of relief of the whole area of Toplica region. Area of Toplica region is 2.231 km 2 with a population of 90600 citizens. Divided into fourth municipalities (Prokuplje, Žitoradja, Black, Kursumlija). The GIS modeling indicates that ideal areas for solar development are located the potential places in Toplica region. Only 13.6 km 2 of the head model scores that were in the 90-100% range. However, given the statewide high insolation values with minimal variance, solar projects may be better suited for small-scale residential or commercial projects.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"6 1","pages":"44-48"},"PeriodicalIF":0.0,"publicationDate":"2016-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71152398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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