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Wyświetlanie 1-10 z 122
Tytuł:
Naval mine detection system based of FPGA circuit
Autorzy:
Wołoszyn, M.
Łubkowski, J.
Chomnicki, M.
Tematy:
FPGA
naval mines
electrical conductivity
Pokaż więcej
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Powiązania:
https://bibliotekanauki.pl/articles/97240.pdf  Link otwiera się w nowym oknie
Opis:
Electrochemical processes take place in a metal object immersed into sea water even if an anticorrosive coating is applied [1]. As a result, flowing field appears around the object. There are naval mines between many other objects situated in the sea. Naval mines can be put in the seabed in order to be more difficult to detect by sonars. Such a mine is located on the line demarking two environments of different electrical conductivity. The results of a computer analysis of the influence of seabed’s electrical conductivity on the electric field’s disposition around a mine model are shown below. Also, a naval mine detection system based on the FPGA circuit is presented.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Relationship Between Mechanical and Electrical Properties During Vulcanisation of SBR Based Rubber
Autorzy:
BOŠÁK, Ondrej
MINÁRIK, Stanislav
KUBLIHA, Marian
LABAŠ, Vladimír
Tematy:
electrical conductivity
torque
curing
linear heating
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Wydawca:
Uniwersytet Rzeszowski
Powiązania:
https://bibliotekanauki.pl/articles/457034.pdf  Link otwiera się w nowym oknie
Opis:
The aim of this paper is description of vulcanization process by monitoring of selected electrical and mechanical parameters. The experiments have shown that the vulcanization process can be qualitatively and quantitatively evaluated on the basis of measurements of mechanical (standard procedure in rubber industry) and also electrical parameters. The results obtained for model system SBR rubber mixture under conditions of linear heating are presented also.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating the suitability of a new telemetric capacitance-based measurement system for real-time application in irrigation and fertilization management
Autorzy:
Treder, Waldemar
Klamkowski, Krzysztof
Tryngiel-Gać, Anna
Wójcik, Katarzyna
Tematy:
electrical conductivity
fertigation
salinity
soil moisture
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Wydawca:
Instytut Technologiczno-Przyrodniczy
Powiązania:
https://bibliotekanauki.pl/articles/2203534.pdf  Link otwiera się w nowym oknie
Opis:
The suitability of a new wireless smart farming system for controlling irrigation and fertilization of horticultural plants was assessed in the study. The system (name: AGREUS® ) includes sensors (soil moisture, salinity, weather data), executive modules (valve modules), and an application available on the web portal (accessed through computers and mobile devices). The studies were performed under laboratory and field conditions. Laboratory tests included appraisal of the precision of soil moisture and salinity measurements carried out with the soil probe (comparison with the results obtained by laboratory methods). Operational tests were conducted in field trials. In these trials, assessment of the possibility of practical control of irrigation and monitoring soil salinity was performed in an apple orchard. The conducted analyses have shown the usefulness of the system, not only for automatic control of irrigation but also for making decisions about the necessity to fertilize plants. The system enables continuous monitoring of changes in soil moisture and salinity, including the migration of minerals across the soil profile (using a probe with several measuring elements) as a result of the applied irrigation or rainfall. The system allows for automatic application of irrigation or fertigation depending on the adopted soil moisture and salinity thresholds. However, the tests showed that a salinity index calculated by the system does not directly correspond to the salinity values determined by laboratory methods. For this reason individual interpretation and determination of optimal ranges for plants is required.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the Performance of Polypyrrole Coated Conductive Fabrics Prepared from Different Base Materials
Autorzy:
Zhao, Xiaoming
Xue, Huangyu
Wu, Haiying
Liu, Yuanjun
Zhao, Jiaqi
Liu, Yanyan
Wydawca:
Sciendo
Cytata wydawnicza:
Liu, Yuanjun, et al. "Research on the Performance of Polypyrrole Coated Conductive Fabrics Prepared from Different Base Materials" Fibres & Textiles in Eastern Europe, vol. 31, no. 2, Sciendo, 2023, pp. 75-81. https://doi.org/10.2478/ftee-2023-0018
Opis:
The project was supported by fundamental research funds for the central universities. In addition, the authors would like to acknowledge Project No. 202310058033.
In this paper, polypyrrole coated conductive fabrics were prepared using pyrrole as the monomer, p-toluene sulfonic acid as the doping agent and ammonium persulfate as the oxidant, adopting the simple method of situ polymerization of the liquid phase. Six types of conductive polypyrrole coated fabrics were prepared adopting polyester-cotton blended fabrics, nylon fabrics, wool fabrics, silk fabrics, basalt fabrics and aramid fabric respectively as base materials and using the same process conditions; its electrical conductivity was compared, and the distribution and resistance of the washing fastness of polypyrrole on the surface of those fabrics were studied. Results showed that under the same process conditions, the conductivity of polypyrrole coated terylene fabrics was the best, followed by the polypyrrole coated nylon fabrics and polypyrrole coated wool fabrics. Observed by electron microscope, the distribution of polypyrrole was more homogeneous on different base cloths. After washing, it was concluded that the combination fastness of polypyrrole with polyester-cotton, nylon and wool was better, while the combination fastness of polypyrrole with basalt and aramid was poor.
Dostawca treści:
Repozytorium Centrum Otwartej Nauki
Artykuł
Tytuł:
Research on the Performance of Polypyrrole Coated Conductive Fabrics Prepared from Different Base Materials
Autorzy:
Liu, Yuanjun
Xue, Huangyu
Liu, Yanyan
Zhao, Jiaqi
Wu, Haiying
Zhao, Xiaoming
Tematy:
base material
polypyrrole
coating
fabrics
electrical conductivity
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:
https://bibliotekanauki.pl/articles/24200955.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, polypyrrole coated conductive fabrics were prepared using pyrrole as the monomer, p-toluene sulfonic acid as the doping agent and ammonium persulfate as the oxidant, adopting the simple method of situ polymerization of the liquid phase. Six types of conductive polypyrrole coated fabrics were prepared adopting polyester-cotton blended fabrics, nylon fabrics, wool fabrics, silk fabrics, basalt fabrics and aramid fabric respectively as base materials and using the same process conditions; its electrical conductivity was compared, and the distribution and resistance of the washing fastness of polypyrrole on the surface of those fabrics were studied. Results showed that under the same process conditions, the conductivity of polypyrrole coated terylene fabrics was the best, followed by the polypyrrole coated nylon fabrics and polypyrrole coated wool fabrics. Observed by electron microscope, the distribution of polypyrrole was more homogeneous on different base cloths. After washing, it was concluded that the combination fastness of polypyrrole with polyester-cotton, nylon and wool was better, while the combination fastness of polypyrrole with basalt and aramid was poor.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructural, Electrical and Mechanical Properties of the Al-Zn-Mg-Mn Alloy with Strontium Addition
Autorzy:
Yoo, Hyo-Sang
Kim, Yong-Ho
Lee, Byoung-Kwon
Ko, Eun-Chan
Lee, Sang-Chan
Lee, Seong-Hee
Son, Hyeon-Taek
Tematy:
Sr addition
electrical conductivity
mechanical properties
microstructure
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Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:
https://bibliotekanauki.pl/articles/59110915.pdf  Link otwiera się w nowym oknie
Opis:
This study investigated the improvement in the electrical conductivity and mechanical properties obtained by adjusting the amount of the Sr addition to the Al-Zn-Mg-Mn alloy. The addition of Sr formed an intermetallic compounds, and the volume fraction of the intermetallic compounds increased with increasing Sr content. As the amount of Sr added increased from 0 to 1.0 wt%, the electrical conductivity of the extruded alloy decreased to 48.9, 45.2 and 42.5% IACS. As the addition amount of Sr increased, the average grain size of the rolled alloy decreased to 55.5, 53.1 and 42.3 μm. And, the ultimate tensile strength increased to 195, 212 and 216 MPa.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wiedemann–Franz law for massless Dirac fermions with implications for graphene
Autorzy:
Rycerz, Adam
Opis:
In the 2016 experiment by Crossno et al. the electronic contribution to the thermal conductivity of graphene was found to violate the well-known Wiedemann–Franz (WF) law for metals. At liquid nitrogen temperatures, the thermal to electrical conductivity ratio of charge-neutral samples was more than 10 times higher than predicted by the WF law, which was attributed to interactions between particles leading to collective behavior described by hydrodynamics. Here, we show, by adapting the handbook derivation of the WF law to the case of massless Dirac fermions, that significantly enhanced thermal conductivity should appear also in few- or even sub-kelvin temperatures, where the role of interactions can be neglected. The comparison with numerical results obtained within the Landauer–Büttiker formalism for rectangular and disk-shaped (Corbino) devices in ballistic graphene is also provided.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The influence of electronic exposure and heat treatment on the electrical conductivity of epoxy polymer materials
Autorzy:
Udovytska, Yuliia
Luniov, Sergiy
Kashytskyi, Vitalii
Maslyuk, Volodymyr
Megela, Ivan
Tematy:
irradiation
epoxy resin
specific electrical conductivity
heat treatment
Pokaż więcej
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Powiązania:
https://bibliotekanauki.pl/articles/950073.pdf  Link otwiera się w nowym oknie
Opis:
The influence of electron irradiation fluxes with energy of 12 MeV and heat treatment on the electrical properties of epoxypolymers with PEPA content of 11, 12 and 13 wt.h. per 100 wt. including epoxy resin. It is show that the electrical conductivity of epoxypolymer increases with electron irradiation fluxes greater than 10 kGy. It found that extra heat treatment of irradiated samples with a hardener content of 12 wt. h. hours leads to an increase in their electrical conductivity. The nature of the obtained dependences of electrical conductivity is determine by the processes of cross-linking, radiation, thermal destruction and mass fraction of the hardener. Radiation-stimulated increase in the conductivity of epoxypolymers can be use to create conductive protective coatings and sensor electronics elements.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 122

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