PHYSREPositoryThe DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.https://physrep.ff.bg.ac.rs:4432024-03-18T04:01:49Z2024-03-18T04:01:49ZУтицај радиофреквентног нејонизујућег зрачења на животну средину у Републици СрпскојPopović, Zoran P.Predrag Ilićhttps://physrep.ff.bg.ac.rs/handle/123456789/14022024-02-26T11:12:09Z2023-08-01T00:00:00ZTitle: Утицај радиофреквентног нејонизујућег зрачења на животну средину у Републици Српској
Authors: Popović, Zoran P.; Predrag Ilić
Editors: Ilić P; Govedar Z; Pržulj N
Abstract: Ниво загађења радиофреквентним зрачењем расте сразмерно
развоју нових телекомуникационих технологија и ширењем потреба
корисника. Да би се спречила изложеност електромагнетном зрачењу изнад
дозе дозвољене за општу популацију, неопходно је студиозно планирање
изградње антенских система и испитивање животне и радне средине у
њиховој околини. Градске зоне су потенцијално најугроженије када је реч о
изложености високофреквентном нејонизујућем зрачењу, и то је у овом раду
описано примерима осетљивих локација (околине школа, вртића и болничког
центра). Преглед података и анализа стања оптерећености животне
средине у Републици Српској нејонизујућим електромагнетним зрачењем био
је примарни циљ студија о овој теми. Приказане су мерне методе и алати за
теоријску процену коришћени за детекцију и предикцију ових физичких
штетности, које сходно начину живота имају тенденцију перманентног
раста.2023-08-01T00:00:00ZExamination along with Precise Mapping of Radio Frequency Pollution over Environment of Elementary School in Banja LukaPopović, Z.P.Predrag IlićSuzana Gotovac AtlagićSlađana RikićBranko Radovićhttps://physrep.ff.bg.ac.rs/handle/123456789/14012024-02-23T20:02:32Z2021-10-01T00:00:00ZTitle: Examination along with Precise Mapping of Radio Frequency Pollution over Environment of Elementary School in Banja Luka
Authors: Popović, Z.P.; Predrag Ilić; Suzana Gotovac Atlagić; Slađana Rikić; Branko Radović
Abstract: Rapid telecommunications developing during previous decades is followed by novel technology systems as well as enlargement of environmental non-ionized radiation level. Emitted electromagnetic signals from base stations are shifted to the higher frequencies range with limited penetrability, requiring additional strength which implicates increasing risk for human health. The present research shows the stage of electromagnetic pollution from exposed locations in the vicinity of the elementary school in Banja Luka, obtained both by experimental measurements and theoretical estimations. For theoretical prediction, a new upgraded software was developed for visualization in two and three dimensions of real space, where calculations are performed including all fundamental characteristics of the antenna along with environment characteristics.2021-10-01T00:00:00ZElementary band co-representations for (double)-grey line groupsDmitrović, SašaVuković, TatjanaMilošević, IvankaDamnjanović, M.https://physrep.ff.bg.ac.rs/handle/123456789/14002024-02-22T21:22:04Z2022-09-23T00:00:00ZTitle: Elementary band co-representations for (double)-grey line groups
Authors: Dmitrović, Saša; Vuković, Tatjana; Milošević, Ivanka; Damnjanović, M.
Abstract: Full sets of inequivalent elementary band co-representations (coEBRs) for spinless and spinful systems with grey line group (LG) symmetry are calculated and, together with recently reported elementary band representation (EBRs) for colorless single and double LGs by Milošević et al (2020 J. Phys. A: Math. Theor. 53 455204), the task of characterization of nonmagnetic quasi-one-dimensional (quasi-1D) topological crystals by means of the theory of topological quantum chemistry can be completed. Effects of additional time reversal symmetry on band topology and applicability of topological quantum chemistry is thoroughly analyzed. The main conclusions of the latter are illustrated on spinful Su-Schrieffer-Heeger model (topological mirror chain). Technique of induction and decomposition of coEBRs is fully developed and presented in detail. Complete sets of coEBRs for all thirteen families of single and double grey LGs are tabulated. Quasi-1D structures with symmetry enforced hourglass fermions are singled out.2022-09-23T00:00:00ZDielectric and thermal properties of composites based on low-density polyethylene and NaA zeoliteMarinković, FilipB. Stankovichttps://physrep.ff.bg.ac.rs/handle/123456789/13992023-12-27T20:43:18Z2023-08-28T00:00:00ZTitle: Dielectric and thermal properties of composites based on low-density polyethylene and NaA zeolite
Authors: Marinković, Filip; B. Stankovic2023-08-28T00:00:00Z