Stark full widths at half maximum (FWHM) for ten multiplets of doubly charged potassium ion (K III), and 35 multiplets of triply charged calcium ion (Ca IV) have been calculated for electron density of 1017 cm−3 by using the symplified modified semiempirical (SMSE) method. The calculations were performed for temperatures from 5 000 K to 80 000 K, for K III and for temperatures from 10 000 K to 160 000 K for Ca IV, for broadening by collisions with electrons. The results obtained here will be implemented in the STARK-B database which is a memeber of Virtual atomic and molecular data center (VAMDC).
{"title":"On the stark broadening of K III and Ca IV spectral lines","authors":"S. Dimitrijević","doi":"10.5937/UNIVTHO8-19891","DOIUrl":"https://doi.org/10.5937/UNIVTHO8-19891","url":null,"abstract":"Stark full widths at half maximum (FWHM) for ten multiplets of doubly charged potassium ion (K III), and 35 multiplets of triply charged calcium ion (Ca IV) have been calculated for electron density of 1017 cm−3 by using the symplified modified semiempirical (SMSE) method. The calculations were performed for temperatures from 5 000 K to 80 000 K, for K III and for temperatures from 10 000 K to 160 000 K for Ca IV, for broadening by collisions with electrons. The results obtained here will be implemented in the STARK-B database which is a memeber of Virtual atomic and molecular data center (VAMDC).","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"8 1","pages":"79-85"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71154269","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}
R. Jakšić, S. Vasić, Đ. N. Labus, M. Papović, R. Stanojević, N. Đukić
Collembola fauna has been investigated at different microhabitats near the beach in Bečići, Montenegro. Samples were collected from four locations: Hotel “Tara”, “Sveti Toma” Church (St. Thomas), Hotel “Naftagas” and “Zelena Stena” (Green Rock). Each of the location presented different microhabitat: under the palm tree, cypresses tree, larch tree and white pine tree. Samples were taken in May and September 2015 and results presented as qualitative findings. Total number of 30 Collembola species was identified, classified into six families and 17 genera. Representatives of the family Hypogastruridae and Isotomidae were recorded at all of the studied sites, while representatives of the families: Naenuridae, Onychiuridae, Entomobryidae and Sminthuridae were present on some of locations. The biggest number of species and the highest Collembola population density was found at the Green Stone site, 24 species in total, microhabitatwhite pine, and the smallest number of species, 6 on site “St. Thomas” Church, microhabitatcypresses trees.
{"title":"The springtails (Insecta: Collembola) fauna at different microhabitats of Bečići beach, Montenegro","authors":"R. Jakšić, S. Vasić, Đ. N. Labus, M. Papović, R. Stanojević, N. Đukić","doi":"10.5937/UNIVTHO8-14774","DOIUrl":"https://doi.org/10.5937/UNIVTHO8-14774","url":null,"abstract":"Collembola fauna has been investigated at different microhabitats near the beach in Bečići, Montenegro. Samples were collected from four locations: Hotel “Tara”, “Sveti Toma” Church (St. Thomas), Hotel “Naftagas” and “Zelena Stena” (Green Rock). Each of the location presented different microhabitat: under the palm tree, cypresses tree, larch tree and white pine tree. Samples were taken in May and September 2015 and results presented as qualitative findings. Total number of 30 Collembola species was identified, classified into six families and 17 genera. Representatives of the family Hypogastruridae and Isotomidae were recorded at all of the studied sites, while representatives of the families: Naenuridae, Onychiuridae, Entomobryidae and Sminthuridae were present on some of locations. The biggest number of species and the highest Collembola population density was found at the Green Stone site, 24 species in total, microhabitatwhite pine, and the smallest number of species, 6 on site “St. Thomas” Church, microhabitatcypresses trees.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"8 1","pages":"5-9"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71153135","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 technological process for the production of bluestone consists of three phases: the melting of waste copper in stationary flame furnaces, the granulate dissolution with sulfuric acid in the presence of the stock solvent of copper sulphate and hydrogen peroxide, and the crystallization of copper sulphate from a saturated blue stone solution in natural baths for crystallization. This paper describes the production of bluestone using hydrogen peroxide as an oxidation agent in a mixture of sulfuric acid and a stock solution of copper sulphate as well as the statistical description and graphic representation of the dissipation of copper Cu in (%), lead Pb in (%) and nickel Ni in (%) in the production of copper sulphate. On the basis of the statistical analysis, the value of copper Cu in (%) ranged from 70.3 to 99.78%, with an arithmetic mean of 91.88800%, which shows that the value of copper only in point 4 was below 80%.
{"title":"Statistical analysis of the production of bluestone from granulates (elementary copper) by oxidation with hydrogen peroxide mixed with stock solution of bluestone and sulfuric acid","authors":"D. Ilić","doi":"10.5937/UNIVTHO8-17822","DOIUrl":"https://doi.org/10.5937/UNIVTHO8-17822","url":null,"abstract":"The technological process for the production of bluestone consists of three phases: the melting of waste copper in stationary flame furnaces, the granulate dissolution with sulfuric acid in the presence of the stock solvent of copper sulphate and hydrogen peroxide, and the crystallization of copper sulphate from a saturated blue stone solution in natural baths for crystallization. This paper describes the production of bluestone using hydrogen peroxide as an oxidation agent in a mixture of sulfuric acid and a stock solution of copper sulphate as well as the statistical description and graphic representation of the dissipation of copper Cu in (%), lead Pb in (%) and nickel Ni in (%) in the production of copper sulphate. On the basis of the statistical analysis, the value of copper Cu in (%) ranged from 70.3 to 99.78%, with an arithmetic mean of 91.88800%, which shows that the value of copper only in point 4 was below 80%.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"8 1","pages":"22-29"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71153540","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 history of the study of Lepidoptera in caves in Serbia is given. On this basis, a comparative analysis with Lepidoptera species in neighboring countries – Croatia, Romania and Bulgaria, was carried out. The presence of cavernicolous habitats and ecological niches suitable for Lepidoptera was investigated. There is a need to investigate these groups of organisms in Serbia and it is suggested that caves in Serbia be a priority in this research.
{"title":"CAVE MOTH AND BUTTERFLY FAUNA (Insecta: Lepidoptera) OF SERBIA: CURRENT STATE AND FUTURE PROSPECTS","authors":"P. Jakšić","doi":"10.5937/UNIVTHO7-14038","DOIUrl":"https://doi.org/10.5937/UNIVTHO7-14038","url":null,"abstract":"A history of the study of Lepidoptera in caves in Serbia is given. On this basis, a comparative analysis with Lepidoptera species in neighboring countries – Croatia, Romania and Bulgaria, was carried out. The presence of cavernicolous habitats and ecological niches suitable for Lepidoptera was investigated. There is a need to investigate these groups of organisms in Serbia and it is suggested that caves in Serbia be a priority in this research.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"7 1","pages":"8-12"},"PeriodicalIF":0.0,"publicationDate":"2017-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48449368","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}
Dejan N. Milic, J. Anastasov, Danijel Đošić, Aldis Seferi
This paper presents simulation results for full availability of a wireless sensor network depending on the RF outputpower of the network nodes in Rayleigh multipath fading environment. Outage probability, relating to the situationin which any one of the sensors is unavailable, is computed by means of numerical simulation, and discussed. Theresults indicate that the trade-of between the outage probability and the energy eciency of the network nodes shouldbe sought, resulting in lowest required output power for the highest tolerable outage threshold.
{"title":"ON THE AVAILABILITY VERSUS TRANSMITTED POWER OF WIRELESS SENSOR NETWORKS IN RAYLEIGH MULTIPATH FADING ENVIRONMENTS","authors":"Dejan N. Milic, J. Anastasov, Danijel Đošić, Aldis Seferi","doi":"10.5937/UNIVTHO7-15332","DOIUrl":"https://doi.org/10.5937/UNIVTHO7-15332","url":null,"abstract":"This paper presents simulation results for full availability of a wireless sensor network depending on the RF outputpower of the network nodes in Rayleigh multipath fading environment. Outage probability, relating to the situationin which any one of the sensors is unavailable, is computed by means of numerical simulation, and discussed. Theresults indicate that the trade-of between the outage probability and the energy eciency of the network nodes shouldbe sought, resulting in lowest required output power for the highest tolerable outage threshold.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49451692","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 aim of this paper is to give alternate representations of the Moore-Penrose inverse of a linear combination of generalized and hypergeneralized projectors and to provide alternate proofs of the invertibility of some linear combination of commuting generalized and hypergeneralized projectors.
{"title":"NOTES ON THE MOORE-PENROSE INVERSE OF A LINEAR COMBINATION OF COMMUTING GENERALIZED AND HYPERGENERALIZED PROJECTORS","authors":"M. Tošić","doi":"10.5937/UNIVTHO7-13982","DOIUrl":"https://doi.org/10.5937/UNIVTHO7-13982","url":null,"abstract":"The aim of this paper is to give alternate representations of the Moore-Penrose inverse of a linear combination of generalized and hypergeneralized projectors and to provide alternate proofs of the invertibility of some linear combination of commuting generalized and hypergeneralized projectors.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41341623","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. Laban, Milena Košanin, G. Isić, U. Ralević, M. Marković, A. Jokić, V. Vasić
In this study, we present a synthesis of silver and copper nanoparticles (NPs) using ascorbic acid as stabilizing and sodium borohydride as reducing agents, respectively. Four colloidal dispersions were obtained, two of them additionally stabilized by gelatin. They were characterized by UV-Vis, AFM, DLS and zeta potential measurements. The size of both silver and copper NPs, determined by AFM measurements, was 10 nm before, and 15 nm after stabilization with gelatin. Antibacterial activity of synthesized NPs was tested using series of gram positive and gram negative bacteria. It was found that Ag and Cu NPs showed antibacterial activity in all cases.
{"title":"PREPARATION OF SILVER AND COPPER NANOPARTICLES IN PRESENCE OF ASCORBIC ACID AND INVESTIGATION OF THEIR ANTIBACTERIAL ACTIVITY","authors":"B. Laban, Milena Košanin, G. Isić, U. Ralević, M. Marković, A. Jokić, V. Vasić","doi":"10.5937/UNIVTHO7-14762","DOIUrl":"https://doi.org/10.5937/UNIVTHO7-14762","url":null,"abstract":"In this study, we present a synthesis of silver and copper nanoparticles (NPs) using ascorbic acid as stabilizing and sodium borohydride as reducing agents, respectively. Four colloidal dispersions were obtained, two of them additionally stabilized by gelatin. They were characterized by UV-Vis, AFM, DLS and zeta potential measurements. The size of both silver and copper NPs, determined by AFM measurements, was 10 nm before, and 15 nm after stabilization with gelatin. Antibacterial activity of synthesized NPs was tested using series of gram positive and gram negative bacteria. It was found that Ag and Cu NPs showed antibacterial activity in all cases.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42621579","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}
Pyraloidea (Lepidoptera: Crambidae & Pyralidae) were sampled in the territories of southern Serbia, Montenegro, the Former Yugoslav Republic of Macedonia and Albania on a total of 53 occasions during 2014, 2016 and 2017. A total of 173 species is reported here, comprising 97 Crambidae and 76 Pyralidae. Based upon published data, 29 species appear to be new to the fauna of Serbia, 5 species are new to the fauna of Macedonia and 37 are new to the fauna of Albania. The data are discussed.
{"title":"A contribution to knowledge of the Balkan Lepidoptera. Some Pyraloidea (Lepidoptera: Crambidae & Pyralidae) encountered recently in southern Serbia, Montenegro, the Republic of Macedonia and Albania","authors":"C. Plant, S. Beshkov, P. Jakšić, A. Nahirnić","doi":"10.5937/UNIVTHO7-15336","DOIUrl":"https://doi.org/10.5937/UNIVTHO7-15336","url":null,"abstract":"Pyraloidea (Lepidoptera: Crambidae & Pyralidae) were sampled in the territories of southern Serbia, Montenegro, the Former Yugoslav Republic of Macedonia and Albania on a total of 53 occasions during 2014, 2016 and 2017. A total of 173 species is reported here, comprising 97 Crambidae and 76 Pyralidae. Based upon published data, 29 species appear to be new to the fauna of Serbia, 5 species are new to the fauna of Macedonia and 37 are new to the fauna of Albania. The data are discussed.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"7 1","pages":"1-27"},"PeriodicalIF":0.0,"publicationDate":"2017-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49585771","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}
This paper, based on the extensive research of relevant professional literature, will present and elaborate possible aspects of influence which information-communications technologies (ICT) have on educational process. Contemporary information-communications technologies and their use in teaching process resulted in numerous enhancements of teaching process altering traditional methods of learning and teaching. With the aim of confirming theoretical postulates researches were conducted on candidates with specific educational degrees in various forms of traditional teaching and teaching with educational software. The survey was conducted on a control and experimental group, on a sample of 1542 candidates. The candidates were observed in a period of approximately five months. The results of this research indicate that the candidates taught by use of educational software have shown far greater level of achieved knowledge and significantly higher motivation for learning. The participants of the experimental group actively participated in the acquisition of their competences. The contribution of this paper is in the new methodological approach to the organization of education, which significantly improves the teaching process, its goals and outcomes.
{"title":"INFORMATION AND COMMUNICATIONS TECHNOLOGIES IN FUNCTION OF TEACHING PROCESS","authors":"N. Denić, Snezana Gavrilovic, Nataša Kontrec","doi":"10.5937/UNIVTHO7-15472","DOIUrl":"https://doi.org/10.5937/UNIVTHO7-15472","url":null,"abstract":"This paper, based on the extensive research of relevant professional literature, will present and elaborate possible aspects of influence which information-communications technologies (ICT) have on educational process. Contemporary information-communications technologies and their use in teaching process resulted in numerous enhancements of teaching process altering traditional methods of learning and teaching. With the aim of confirming theoretical postulates researches were conducted on candidates with specific educational degrees in various forms of traditional teaching and teaching with educational software. The survey was conducted on a control and experimental group, on a sample of 1542 candidates. The candidates were observed in a period of approximately five months. The results of this research indicate that the candidates taught by use of educational software have shown far greater level of achieved knowledge and significantly higher motivation for learning. The participants of the experimental group actively participated in the acquisition of their competences. The contribution of this paper is in the new methodological approach to the organization of education, which significantly improves the teaching process, its goals and outcomes.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49177518","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}
Jovan Dragojlović, Dušan Ristić, Nikola Milentijević
Contemporary processes of industralization, urbanization, deagrarianization, the polarization and globalization contribute socio-economic transformation of the observed space as well as the creation of new carrier of functional relationships in space. Towns with its own influences enrich the network of surrounding settlements, strengthen their mutual relations and create a whole functional settlement system of one area , or the gravity of the urban core. By dividing the functions of the primary, secondary and tertiary, the basis and types of settlements are created by functional criteria according to the type of economic activity and the primary content in them. In this area in the second half of the twentieth and early twenty-first century witnessed substantial changes in almost all components of demographic structure, which resulted in the transformation of functional types of settlement, when the predominantly agrarian settlement characteristic of the area of Toplica road went up mixed and service settlement. The idea behind the study is for the geographically complex area to be displayed in the light of socioeconomic development, and as a basis for further economic development of this part of the Republic of Serbia. Keyword: urbanization, rural settlements, urban settlements, functions, typology, sustainable development, District of Toplica
{"title":"SPATIAL FUNCTIONAL TRANSFORMATION AND TYPOLOGY OF THE SETTLEMENT SYSTEM OF TOPLICA DISTRICT","authors":"Jovan Dragojlović, Dušan Ristić, Nikola Milentijević","doi":"10.5937/UNIVTHO7-15574","DOIUrl":"https://doi.org/10.5937/UNIVTHO7-15574","url":null,"abstract":"Contemporary processes of industralization, urbanization, deagrarianization, the polarization and globalization contribute socio-economic transformation of the observed space as well as the creation of new carrier of functional relationships in space. Towns with its own influences enrich the network of surrounding settlements, strengthen their mutual relations and create a whole functional settlement system of one area , or the gravity of the urban core. By dividing the functions of the primary, secondary and tertiary, the basis and types of settlements are created by functional criteria according to the type of economic activity and the primary content in them. In this area in the second half of the twentieth and early twenty-first century witnessed substantial changes in almost all components of demographic structure, which resulted in the transformation of functional types of settlement, when the predominantly agrarian settlement characteristic of the area of Toplica road went up mixed and service settlement. The idea behind the study is for the geographically complex area to be displayed in the light of socioeconomic development, and as a basis for further economic development of this part of the Republic of Serbia. Keyword: urbanization, rural settlements, urban settlements, functions, typology, sustainable development, District of Toplica","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45806732","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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