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Wyszukujesz frazę "Vargova, B." wg kryterium: Autor


Wyświetlanie 1-6 z 6
Tytuł:
Analysis of Thermal Field in Mineral Transformer Oil Based Magnetic Fluids
Autorzy:
Kosterec, M.
Kurimský, J.
Cimbala, R.
Čonka, Z.
Kruželák, L.
Rajňák, M.
Timko, M.
Kopčanský, P.
Vargová, B.
Powiązania:
https://bibliotekanauki.pl/articles/1032149.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
44.25.+f
44.27.+g
47.11.Fg
47.65.Cb
Opis:
Growing interest in the use of magnetic fluids in power systems especially in transformers as insulation and a coolant is nowadays registered. Magnetisable nanofluids, which are used in cooling systems as an alternative to mineral transformer oil, are characterized by lower concentration of magnetic nanoparticles. The magnetic fluid has better heat transfer and dielectric properties such as breakdown than mineral transformer oil and it can be used to improve heat flow, thereby increasing the ability of the active parts to resist failures such as electromagnetic pulses. External magnetic field may be used for forced circulation of magnetic fluid. Magnetic force inside the magnetic fluid can be adequately controlled by adjusting the incident magnetic field. This paper presents thermal distribution, fluid flow and cooling ability of mineral transformer oil and magnetic fluid based on mineral transformer oil. The concentration of Fe₃O₄ magnetic nanoparticles is 0.15% volume of mineral transformer oil. The thermal field is generated by a steel conductor. Thermal distributions in mineral transformer oil and magnetic fluid are investigated and differences for both cases are discussed in the paper.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 937-939
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tick distribution along animal tracks: implication for preventative medicine
Autorzy:
Rasi, T.
Majlath, I.
Bogdziewicz, M.
Dudek, K.
Majlathova, V.
Wlodarek, J.
Aimasi, M.
Vargova, B.
Tryjanowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/2081665.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Tematy:
One Health
tick-borne diseases
spatial distribution
preventive medicine
Ixodes
human behaviour
Opis:
Introduction. Tick abundance and the prevalence of the pathogens they carry have been increasing worldwide in the last decades, and is projected to increase even further. Despite the fact that problem is global, there still remain many gaps in the diagnosis and treatment of tick-borne diseases. The best protection from tick-borne pathogens, therefore, is prevention and avoidance of bites. Ticks mobility is limited so that their spatial distribution is strongly correlated with the presence of, especially with large mammals. In this study, the hypothesis was tested that tick abundance is higher on animal tracks in the forests than in adjacent habitats. This is an important issue because there are still several human habits and practices that can decrease the zoonoses risk. For example, during recreation in forest, people should always walk on the paths (including narrow animal’s tracks) instead of wading through bushes. Materials and method. Flagging of animal trails and near control transects were performed simultaneously. Next, collected ticks were counted, sexed and aged. Results. The abundance of ticks was almost 5-fold (Ixodes ricinus) and 3-fold (Dermacentor spp.) higher on animal trails than on adjacent control transects. Conclusions. The results obtained support the hypothesis that ticks are more abundant on pathways than in adjacent habitats. Most likely, the pattern emerges because large mammals, like deer, which are the most important ticks hosts, use forest paths to move across the landscape and frequently move along the same routes. This research sends an important public message that these forest trails are hotspots of disease risk and should be avoided.
Źródło:
Annals of Agricultural and Environmental Medicine; 2018, 25, 2; 360-363
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphometric analysis – effect of the radiofrequency interface of electromagnetic field on the size of hatched Dermacentor reticulatus larvae
Autorzy:
Vargová, B.
Majláth, I.
Kurimský, J.
Cimbala, R.
Pipová, N.
Živčák, J.
Tryjanowski, P.
Peťko, B.
Džmura, J.
Ižariková, G.
Majláthová, V.
Powiązania:
https://bibliotekanauki.pl/articles/28762746.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 3; 419-425
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variation of magnetic fluid deformation related to nanoparticle concentration in steady electric field
Autorzy:
Kosterec, M.
Kurimský, J.
Cimbala, R.
Špes, M.
Farkaš, R.
Dolník, B.
Gamcová, M.
Rajňák, M.
Timko, M.
Kopčanský, P.
Paulovičová, K.
Vargová, B.
Powiązania:
https://bibliotekanauki.pl/articles/1048186.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
47.65.Cb
41.20.-q
47.55.D-
Opis:
Today, it is important to know the behaviour of magnetic fluids applied in the power electrical machines, e.g. in power transformers, when exposed to an electric field. Besides their promising applications in high voltage engineering, they are of increasing interest from designed assembly and pattern formation point of view. The structure of such magnetic fluids is easily controllable by external magnetic fields. However, less attention has been paid to structural phenomena in magnetic fluids induced by electric fields. The core of this paper is dedicated to the experimental observation of a magnetic fluid droplet deformation in a steady electric field. The mutual relation between the deformation parameter and magnetic nanoparticles concentration is analysed. Spatio-temporal analysis of the droplet shape is presented in the paper. The phenomena of the droplet deformation were recorded by a camera. The detailed experimental procedure is presented. The method of deformation parameter calculation based on the linear pixel as the smallest-size unit in digital image is written. Finally, the relation between the deformation parameter and the nanoparticle volume concentration, as well as the time and magnitude of the DC field application are thoroughly evaluated. The results show that the deformation parameter decreases with increasing concentration at constant applied steady electric field but increases with increasing applied steady electric field.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 570-573
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Mn doping on magnetic and structural properties of Co₂FeSi Heusler alloy
Autorzy:
Galdun, L.
Ryba, T.
Kováč, J.
Prida, V.
Hernando, B.
Vargová, Z.
Varga, R.
Powiązania:
https://bibliotekanauki.pl/articles/1054765.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Be
72.20.Lp
Opis:
We have studied the effect of Mn doping on structural and magnetic properties of Co₂FeSi Heusler alloy. Co₂FeSi, Co₂Mn_{0.25}Fe_{0.75}Si and Co₂Mn_{0.5}Fe_{0.5}Si alloys were prepared by melt spinning technique which offers fast and simple production of large amount of materials in a single production step. The rapid quenching method provides an opportunity to prepare Heusler alloys with highly ordered L2₁ structure confirmed by X-ray analysis in all the samples. Magnetic measurements revealed high Curie temperatures (>1000 K) and well defined easy magnetization plane parallel with the ribbon plane. Those attributes predispose given samples for applications in spintronics.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 866-868
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ni_2FeSi Heusler Glass Coated Microwires
Autorzy:
Galdun, L.
Ryba, T.
Prida, V.
Hernando, B.
Zhukova, V.
Zhukov, A.
Vargová, Z.
Varga, R.
Powiązania:
https://bibliotekanauki.pl/articles/1032750.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Be
72.20.Lp
Opis:
We report on fabrication, structural and magnetic properties of novel Heusler-type glass coated Ni₂FeSi microwires that were prepared by the Taylor-Ulitovsky method, having a metallic nucleus diameter about 3.9 μm and total sample diameter of 39 μm. This single step and low cost fabrication technique offers to prepare up to km of glass-coated microwires starting from few g of cheap elements for diverse applications. The X-ray diffraction data from the metallic nucleus indicates L2₁ crystalline structure (a=5.563 Å), with a possible DO3 disorder. Magnetic measurements determined the Curie temperature well above the room temperature (770 K) together with uniform easy magnetization axis of the metallic core, which predisposes this material to a suitable candidate for spintronic applications.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 851-853
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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