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    Wyświetlanie 1-12 z 12
    Tytuł:
    Laser Sheet Scattering and the Cameras Positions in Particle Image Velocimetry
    Autorzy:
    Ilić, J.
    Čantrak, Dj.
    Srećković, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047893.pdf
    Data publikacji:
    2007-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.25.Fx
    42.62.Eh
    42.68.Mj
    42.79.Qx
    Opis:
    Simulations of laser sheet scattering by microparticles, based on the generalized Lorenz-Mie theory for the case of numerous random spatial distributions of scattering particles, were done, using the novel computational time saving strategy. This type of scattering by particles immersed in a fluid flow and its recording on cameras, presents the essence of particle image velocimetry systems. The continuous and large change of the intensity of a scattered light falling on the camera causes the sequences of images of varying quality, which makes many of them useless. This paper shows how the problem could be alleviated by determining the angles of low relative standard deviation of scattered light intensity and using them for recording, as well as by avoiding the angles of high relative standard deviation of scattered light intensity.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 5; 1113-1118
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Results of the 2015 national indoor radon intercomparison measurements in Serbia
    Autorzy:
    Forkapić, S.
    Bikit, K.
    Arsić, V.
    Ilić, J.
    Pantelić, G.
    Živanović, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/147750.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    charcoal canisters
    indoor radon
    interlaboratory comparison
    Opis:
    Results and conclusions of interlaboratory comparison of indoor radon in 2015 in Serbia are presented. The participants were three accredited laboratories from Serbia: Serbian Institute of Occupational Health “Dr Dragomir Karajović”, Laboratory for Radioactivity and Dose Measurements at the Faculty of Sciences, University of Novi Sad and Radiation and Environmental Protection Department, Vinča Institute of Nuclear Science. The laboratories make use of the same method for radon measurement, using charcoal canisters according to US Environmental Protection Agency (EPA) protocol 520/5-87-005. Calibration of detection efficiency was performed using EPA radium standard. Radon activity concentrations were determined on the basis of the intensity of short-living radon daughters, 214Bi and 214Pb, gamma lines. The results of intercomparison were evaluated by using the u-test, which was calculated according to the International Atomic Energy Agency criteria. In this paper, not only limitations but also the advantages and possibilities of application of this method for measuring levels of human exposure to radon are discussed
    Źródło:
    Nukleonika; 2016, 61, 3; 321-325
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laser Interaction with Material - Theory, Experiments and Discrepancies
    Autorzy:
    Srećković, M.
    Ilić, J.
    Davidović, M.
    Djokić, B.
    Tomić, Ž.
    Latinović, Z.
    Družijanić, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795618.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    01.55.+b
    42.62.-b
    42.25.Bs
    81.40.Wx
    61.80.Ba
    Opis:
    The experimental treatment of chosen material with laser beams, starting from continuous wave up to fs pulses, produces the necessity to find the common and sophisticated theoretical approaches to interaction modeling. For chosen materials, some laser treatment and damage analyses are performed. The provoked stresses and parameters of transport processes (penetration depth) are calculated by using the programs for electrical circuit analyses. Some inconsistencies in the treatment of large area laser-material interaction are discussed.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 618-621
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Models of Interactions of Laser Beams with Materials of Interest for Optical Components and Provoked Damages
    Autorzy:
    Srećković, M.
    Ilić, J.
    Kovačević, A.
    Pantelić, S.
    Latinović, Z.
    Borna, N.
    Ćosović, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047854.pdf
    Data publikacji:
    2007-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.40.Wx
    61.80.Ba
    42.62.-b
    Opis:
    Models of interactions of laser beams with materials of interest for optical components are presented in this paper. Special attention is paid to damages which appear within both active materials and optical components along the path of a propagating beam with theoretical treatment via various models.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 5; 935-940
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First steps towards national radon action plan in Serbia
    Autorzy:
    Udovičić, V.
    Maletić, D.
    Eremić Savković, M.
    Pantelić, G.
    Ujić, P.
    Čeliković, I.
    Forkapić, S.
    Nikezić, D.
    Marković, V. M.
    Arsić, V.
    Ilić, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/148086.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radon
    action plan
    survey
    Opis:
    Radon problem has a special attention in many countries in the world and the most of them have established national radon programmes. The radon issues in Serbia have not been approached in a systematic and organized way. Currently, there are many research groups and institutions working in radon fi eld, and it is a good basis to integrate all these activities into a comprehensive national programme to defi ne the strategic objectives and action plan for the next few years. Also, Serbia as a candidate for membership in the EU is obliged to harmonize its legislation, including the fi eld of radiation protection in which the radon issues has an important role. In this report, a brief history of radon research, present status and plans for the future activity on radon issues in Serbia are presented. Regarding the long-term plans, the establishment and implementation of the Radon Action Plan with the primary goal of raising awareness about the harmful effects of public exposure to radon and implementing a set of measures for its reduction. In that sense, the synergy between the national, regional and local organizations responsible for public health and radiation protection must be achieved.
    Źródło:
    Nukleonika; 2016, 61, 3; 361-365
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phonon-Induced Thermodynamic Properties of Ultra-narrow Wires
    Autorzy:
    Ilić, D.
    Šetrajčić, J.
    Jaćimovski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1029824.pdf
    Data publikacji:
    2018-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    Phonons
    ultra-narrow wire
    the Green function
    thermodynamics
    specific heat
    Opis:
    In this paper, we investigated the influence of size effect on thermodynamic properties of ultra-narrow wires with a simple cubic lattice, by means of two-time dependent Green functions method, adjusted to confined crystalline structures. Poles of Green functions, which defining phonon spectra, are found by solving the secular equation. For different boundary parameters, this problem is presented graphically. The temperature behavior of ultra-narrow wire thermal capacitance is compared to that of bulk structures. It turned out that in low-temperature region thermal capacitance of the ultra-narrow wire is notably lower than in the corresponding bulk sample. How this fact reflects the thermal, conducting and superconducting properties of materials, is discussed in the conclusion.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 1; 57-62
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Goos-Hänchen Shift on Tunneling Times in Dispersive Nonlinear Media
    Autorzy:
    Ilić, I.
    Beličev, P.
    Milanović, V.
    Radovanović, J.
    Hadžievski, Lj.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795625.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    03.65.Xp
    42.25.Bs
    42.65.Hw
    78.20.Ci
    Opis:
    The Goos-Hänchen effect is an optical phenomenon defined as a displacement of the reflected beam of linearly polarized light after the total internal reflection, which occurs perpendicularly to the direction of propagation. Due to this effect, when an optical wave propagates through a barrier, tunneling times may change accordingly. In this paper, we consider the impact of the Goos-Hänchen effect on group delay and dwell time for electromagnetic wave propagating through a nonlinear dispersive slab placed inside linear dispersive surroundings. Numerical calculations are performed for the special case, namely a double negative index metamaterial embedded into a material with a saturable nonlinearity, when a background medium is vacuum. The numerical results for tunneling times are calculated when the Goos-Hänchen effect is observed. It is shown that this approach gives more accurate expressions for tunneling times when the angle of incidence has a non-zero value.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 638-641
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of eggplant rootstock on yield and quality parameters of grafted tomato
    Efekt podkładki bakłażana na plon i parametry jakości szczepionego pomidora
    Autorzy:
    Miskovic, A.
    Ilic, O.
    Bacanovic, J.
    Vujasinovic, V.
    Kukić, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543445.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    The effect of eggplant rootstock on yield and quality characteristics of tomato fruit have been studied in a three subsequent cropping years at the Faculty of Agriculture in Novi Sad, Serbia. Tomato cultivar ‘Jeremy’ was used as scion and as an ungrafted control, and as rootstock eggplant cultivar ‘Madona’ and Lycopersicon esculentum ssp. subspontaneum var. cerasiformae. In the case of Lycopersicon esculentum ssp. subspontaneum var. cerasiformae as a rootstock high percentage (82%) of successful grafting was observed, while survival rate of treatment ‘Jeremy’ as a scion and eggplant ‘Madona’ as a rootstock was only 68%. A negative effect of grafting on the eggplant rootstock was observed regarding fruit yield per plant, number of fruits per plant and total yield. These parameters were significantly higher in the ungrafted treatments and in the treatment Lycopersicon esculentum ssp. subspontaneum var. cerasiformae as a rootstock. Organic acid and lycopene content was significantly higher when the eggplant ‘Madona’ was used as a rootstock. Total sugar and vitamin C content was highest in the treatment Lycopersicon esculentum ssp. subspontaneum var. cerasiformae as a rootstock.
    Badano wpływ podkładki z bakłażana na plon i cechy jakości owoców pomidora w trzech kolejnych latach upraw. Odmiana pomidora ‘Jeremy’ była użyta do szczepienia i jako nieszczepiona kontrola, natomiast jako podkładki użyto odmiany bakłażana ‘Madona’ oraz Lycopersicon esculentum ssp. subspontaneum var. cerasiformae. W przypadku ‘Madona’ oraz Lycopersicon esculentum ssp. subspontaneum var. cerasiformae jako podkładki zaobserwowano wysoki procent (82%) udanych szczepień, natomiast wskaźnik przeżycia dla ‘Jeremy’ jako zrazu i bakłażana ‘Madona’ jako podkładki wynosił tylko 68%. Zaobserwowano negatywny wpływ szczepienia na podkładce bakłażana jeśli chodzi o plon owoców z rośliny, liczbę owoców na roślinie oraz plon całkowity. Parametry te były istotnie wyższe przy zabiegach bez szczepień oraz przy zabiegu z użyciem Lycopersicon esculentum ssp. subspontaneum var. cerasiformae jako podkładki. Zawartość kwasów organicznych i likopenu była istotnie większa, gdy jako podkładki użyto bakłażana ‘Madona’. Największą zawartość cukru i witaminy C stwierdzono w owocach podczas zabiegu przy użyciu Lycopersicon esculentum ssp. subspontaneum var. cerasiformae jako podkładki.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2016, 15, 6; 149-160
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Time Delay in Thin Dielectric Slabs with Saturable Nonlinearity
    Autorzy:
    Beličev, P.
    Ilić, I.
    Radovanović, J.
    Milanović, V.
    Hadžievski, Lj.
    Powiązania:
    https://bibliotekanauki.pl/articles/1808066.pdf
    Data publikacji:
    2009-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    03.65.Xp
    41.20.Jb
    42.25.Bs
    42.70.Nq
    Opis:
    Time delays for an intense transverse electric wave propagating through a slab with saturable nonlinearity are investigated. The nonlinearity is assumed in a form of the Vinetskii-Kukhtarev model, which is relevant for the slabs made of nonlinear photorefractive crystals, such as GaAs and $LiNbO_3$, which feature a saturable nonlinearity. The expressions for the group delay and the dwell time are derived and the relation between them is studied. It is shown that the difference between them has three different contributions. The first one corresponds to the self-interference associated with the dispersion of the medium surrounding the slab. The other two appear due to the nonlinearity of the slab and oblique incidence of the transverse electric wave. All the results are compared with the case of dielectric slabs with cubic (Kerr) nonlinearity.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 4; 834-837
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review of the Hard-Facing Technology Application for Reparation of the Given Parts in Various Branches of Industry
    Autorzy:
    Lazić, V.
    Arsić, D.
    Mutavdžić, M.
    Nikolić, R.
    Meško, J.
    Radović, L.
    Ilić, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2064968.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    regeneration
    hard-facing
    friction
    wear
    machine parts
    Opis:
    This paper deals with the problem of defining the optimal procedure for reparation of the machine parts of large dimensions and complex shapes. The procedure consists of establishing the causes of the part's damages, definition of the reparation technology, with selection of its parameters and ways of execution. The reparation is done by hard-facing, with heat treatment that consists of preheating, additional heating and the post hard-facing tempering. The process parameters' selection includes choosing the right filler metal(s), ways and order of depositing the hard-faced layers, ways of reaching and maintaining the preheating temperatures, checking of the base metal's chemical composition and mechanical properties and deciding on the post-process heat and mechanical processing of the executed hard-facing. The executed reparation of the forging hammer's mallet, presented in details, serves as an example how the reparation can successfully serve as a substitute for procuring the new part and thus producing the savings both directly in lower costs and indirectly in shortening the down-time of the damaged part operation.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 279--285
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nutrients content and texture changes as effect of harvest time, postharvest treatments and storage condition of carrot
    Autorzy:
    Ilić, Z.S.
    Šunić, L.
    Milenković, L.
    Pestorić, M.
    Belović, M.
    Kevrešan, Ž.
    Mastilović, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543568.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    The purpose of this study was to examine the effect of harvest time (November or January) and postharvest treatments (hot water (50°C), H2O2 (1%), NaOCl (175 ppm)) and nonwashed-control of carrots (Daucus carrota L. cv. ‘Maestro F1’) on the changes in nutrient composition and texture under different storage conditions (S-1: 0°C, 98% RH; S-2: 0–2°C, 85–92% RH). Weight loss and quality changes in carrot roots were evaluated after 120 and 180 days of storage period (SP). After SP weight loss ranged from 3.20% (carrots from the first harvest in S-1 with H2O2 treatment) to 34.51% (carrots from the first harvest in S-2 with hot water treatment). Dry matter (DM) content in carrot roots varied in dependence of the harvest time (9.57– 12.22%) and increased after the SP exept in carrot from first harvest with hot water and H2O2 treatments in S-1. Total sugar content (TSC) increased after SP, more in S-2 cooling room. Vitamin C content in carrot roots decreased more in S-2 (20.7–52.3%) in comparison to S-1 storage conditions (2.0–18.2%). The hardness and flexibility of carrot roots increased after SP for all treatments. Prestorage washing treatments (H2O2 or NaOCl) and storage in S-1 storage regime at temperature (0°C) with a high relative humidity 98% maintained quality of carrot root.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 5; 63-75
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phonon Contribution in Thermodynamics οf Nano-Crystalline Films and Wires
    Autorzy:
    Šetrajčić, J.
    Mirjanić, D.
    Vučenović, S.
    Ilić, D.
    Markoski, B.
    Jaćimovski, S.
    Sajfert, V.
    Zorić, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1808050.pdf
    Data publikacji:
    2009-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    63.20.-e
    65.40.Ba
    67.25.dp
    68.60.-p
    68.65.La
    Opis:
    Spectra of possible phonon states, as well as thermodynamic characteristics of nanocrystals (ultrathin film and quantum wire) of simple cubic crystalline structure are analyzed in this paper, using the method of two-time dependent Green functions. From energy spectra and internal energy of the system the thermal capacitance of these structures in low temperature region is found. The temperature behavior of specific heat is compared to that of corresponding bulk structure. It is shown that at extremely low temperatures thermal capacitance of quantum wire is considerably lower than the thermal capacitance of film as well as the bulk sample. Consequences of this fact are discussed in detail and its influence to thermodynamic properties of materials is estimated.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 4; 778-782
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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