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    Wyświetlanie 1-8 z 8
    Tytuł:
    Performance Evaluation of a Zone-based Three-level Heterogeneous Clustering Protocol for WSNs
    Autorzy:
    Rao, Sanapala Shanmukha
    Shilpi
    Kumar, Arvind
    Powiązania:
    https://bibliotekanauki.pl/articles/24200745.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    clustering
    heterogeneous
    network lifetime
    stability period
    zone-based WSN
    Opis:
    This paper proposes a zone-based three-level heterogeneous clustering protocol (ZB-TLHCP) for heterogeneous WSNs. In ZB-TLHCP, the sensor field/region is divided into zones where super, advance, and normal nodes are deployed uniformly and randomly. The performance of the proposed ZB-TLHCP system is compared with that of zonal-stable election protocol (Z-SEP), distributed energy efficient clustering (DEEC), and threshold-based DEEC (TDEEC) protocol by varying the number of super and advance nodes, their energy levels for the fixed sensor field, and the total number of nodes. Matlab simulation results revealed that the proposed ZB-TLHCP solution performed better than Z-SEP, DEEC, and TDEEC protocols, as it increased the instability period, prolonged the network's lifetime, and achieved higher throughput values.
    Źródło:
    Journal of Telecommunications and Information Technology; 2023, 3; 85--93
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electron Beam Processing of SensorsRelevant Vacoflux-49 Alloy: Experimental Studies of Thermal Zones and Microstructure
    Autorzy:
    Kumar, Pawan
    Yadav, Anshul
    Kumar, Arvind
    Powiązania:
    https://bibliotekanauki.pl/articles/355379.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electron beam processing
    sensor application
    Vacoflux-49
    solidification ring
    fusion zone
    wavy pattern
    Opis:
    Vacoflux-49 (Fe-49% Co-49% V-2%) is used in torque, sonar and gyroscopic sensors applications due to excellent magnetic properties (high saturation magnetisation, low coercivity and high Curie temperature). In this study, the shape, size and characteristics of different thermal zones and the microstructural evolution during electron beam melting and welding of Vacoflux-49 material are studied. The experimental studies on melting have been carried out with under-focussed, focussed and over focussed electron beam. In the case of the under-focussed and over-focused beam, no evaporated zone is found. In the case of focussed beam, a shallow conical-shaped evaporated zone, a choked funnel-shaped fusion zone, a conical shaped partially melted zone and the heat-affected zone are observed. The solidified melt pool in terms of shape, size and microstructure of different zones are investigated for the focussed beam. The grains in the fusion zone appear wavy having crest and trough. The fusion zone microstructure also shows the formation of solidification rings. From the electron beam welding experiments performed for joining two Vacoflux-49 plates (continuous welding), it is found that the weldment shape is similar to the spot melting and re-solidification experiments. The grain growth in different zones in the welding sample is also examined.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1147-1156
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Dispersion Methods on the Mechanical, Thermal and Rheological Properties of HTPB-based Nanocomposites: Possible Binders for Composite Propellants
    Autorzy:
    Ghosh, Kavita
    Kumar, Arvind
    Banerjee, Shaibal
    Patro, Uma Sankar
    Gupta, Manoj
    Powiązania:
    https://bibliotekanauki.pl/articles/358180.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    nanocomposite
    composite propellant
    binder
    dispersion
    tensile strength
    Opis:
    The present study reports on the methods of preparation for HTPB-clay nanocomposites and their mechanical, thermal and rheological properties for their functional utility as an improved binder system for composite propellants. HTPB-clay nanocomposites were prepared by dispersing organoclay Cloisite 30B (1-3 wt.%) in the polymer matrix by magnetic stirring and high shear mixing. Critical parameters like time, temperature and RPM were optimized. These nanocomposites were cured with toluene diisocyanate in the presence of the cure catalyst DBTDL. The dispersion of the nanoclay was evaluated by using small angle X-ray scattering (SAXS) and energy dispersive X-ray (EDX) spectroscopy. EDX suggested homogeneous distribution while SAXS revealed partial exfoliation of the clay particles in the polymer matrix. Superior dispersion of the nanoclay was obtained by high shear mixing. The tensile properties of the nanocomposites prepared by high shear mixing showed 10-20% more strength and elastic modulus. The nanocomposites showed thermal stability higher than the pristine HTPB. Swelling behavior revealed increased cross linking, and the rheological behavior exhibited higher viscosity of the nanocomposites. In addition, the clay amount was increased up to 10 wt.% and its effect on the mechanical, thermal and swelling behavior was observed. Theoretical performance predictions of composite propellants with nanocomposites revealed their possible functional utility.
    Źródło:
    Central European Journal of Energetic Materials; 2019, 16, 2; 281-298
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A newly developed assessment tool on collaborative role of doctor–pharmacist in patient medication management
    Autorzy:
    Porwal, Mayur
    Singh, Lokpal
    Kumar, Arvind
    Rastogi, Vaibhav
    Maheshwari, Kamal
    Sharma, Saurabh
    Powiązania:
    https://bibliotekanauki.pl/articles/552537.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
    Tematy:
    questionnaire
    pharmacist
    doctor
    communication
    Źródło:
    Family Medicine & Primary Care Review; 2016, 1; 44-48
    1734-3402
    Pojawia się w:
    Family Medicine & Primary Care Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interpretive structural modeling of identified success factors to lean implementation in SMEs
    Autorzy:
    Shrimali, Arvind Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/104072.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    lean implementation
    interpretive structural modeling
    ISM
    critical success factors
    CSF
    small and medium enterprises
    SMEs
    implementacja lean manufacturing
    małe i średnie przedsiębiorstwa
    MŚP
    Opis:
    Lean practices are implemented in manufacturing enterprises to find hidden waste and attain continuous improvement. Various enterprises have experienced benefits owing to the Lean implementation. Following the use of appropriate lean instruments and techniques, there are many factors that affect successful lean implementation process. Researchers have identified a large number of these success factors to implementation of Lean. Understanding these enablers and the interactions between them can be crucial to the success of lean implementation. Interpretive Structural Modeling (ISM) is one of the established methodologies to bring forward the interrelationships among parameters of an issue or a problem. The purpose of this paper is to create the hierarchy of the various success factors to Lean Implementation according to their importance using the approach of ISM to facilitate Small and Medium enterprises (SMEs) across India.
    Źródło:
    Quality Production Improvement - QPI; 2019, 1, 1; 69-77
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The four-sided lid driven square cavity using stream function-vorticity formulation
    Autorzy:
    Bagai, Shobha
    Kumar, Manoj
    Patel, Arvind
    Powiązania:
    https://bibliotekanauki.pl/articles/1839818.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    four-sided lid-driven square cavity
    heat and mass transfer
    ADI
    isotherms
    concentration contours
    przepływ
    izotermy
    transfer ciepła
    transfer masy
    liczba Reynoldsa
    liczba Prandtla
    liczba Schmidta
    metoda ADI
    Alternating Direction Implicit
    Opis:
    In this paper, an unsteady 2-D incompressible fluid flow with heat and mass transfer in a four-sided lid driven square cavity is investigated numerically. The top, bottom, left, and right walls of the square cavity move to the right, left, downward and upward respectively. All four sides of the cavity move with a uniform velocity. The flow variables are simulated below the critical Reynolds numbers with isothermal and mass-transfer conditions in the square cavity. We have used a streamfunction-vorticity (ψ - ξ) formulation to investigate the fluid flow in terms of flow variables ψ, ξ, T and C at low Reynolds numbers (Re). The Prandtl number (Pr) and Schmidt number (Sc) have been chosen as 6:62 and 10, 50, 100, 150 respectively, in order to calculate the numerical solutions of T and C. The matrix method has been used to evaluate the stability and convergence of the numerical scheme. The conditions obtained from the matrix method have been used to arrive at the numerical solutions with desired accuracy.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 2; 17-30
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Gap Measurement of Various Dimensions of SERVAQUAL Model in context to Indian Banks
    Autorzy:
    Dogney, Jaydeep
    Bhargava, Payal
    Shrimali, Arvind Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/112076.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    service quality
    customer satisfaction
    benchmarking analysis
    jakość usług
    satysfakcja konsumenta
    analiza porównawcza
    Opis:
    To improve the reputation and customer loyalty, a benchmarking analysis is being carried out, which influences the perception of the service quality for banks. With the expansion of competitive interactions, the results can serve as a strategic tool to gain competitive advantage and customer satisfaction. Banks reveal the expectations and expectations of customers regarding the quality of selected services. The process creates and expands its reputation and builds customer loyalty. This research aims to compare the perception of the quality of four leading banks with logical comparisons.
    Źródło:
    Production Engineering Archives; 2019, 22; 41-44
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of application of some organic amendments on soil properties, extractable micronutrients and their chemical fractions in a sandy loam soil
    Autorzy:
    Dey, Ahana
    Srivastava, Prakash Chandra
    Pachauri, Satya Pratap
    Shukla, Arvind Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/2088187.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    chemical fractions
    micronutrients
    organic amendments
    soil properties
    Opis:
    In a 120-day incubation study, farmyard manure (FYM), mushroom compost (MC), poultry manure (PM), vermi-compost (VC), biogas slurry (BS) and biochar from Lantana sp.; a common weed (BC) each added at 15 t ha-1 significantly increased soil electrical conductivity and organic C content, however, only VC failed to increase soil organic C content significantly but increased soil pH when compared with the control sample. Among organic amendments, FYM, MC, VC and BS increased DTPA-extractable Zn and Mn in soil significantly when compared with the control sample, while BC was significantly effective in regard to increasing both DTPA-extractable Mn and hot water soluble B when compared with the control sample. Application of FYM and MC significantly increased DTPA-extractable Cu and Fe, respectively when compared with the control sample. Simple correlation and path coefficient analysis were performed to identify key chemical fractions of micronutrients in soil having the direct and indirect effects on availability of micronutrients in organically amended soils. Based on soil extractable concentrations of micronutrients in organically amended soils, FYM appeared to be the best source of Zn, Cu and Mn, while MC could serve as the best source of Fe. Biochar from Lantana sp. may serve as a good source of B.
    Źródło:
    Polish Journal of Soil Science; 2020, 53, 2; 181-198
    0079-2985
    Pojawia się w:
    Polish Journal of Soil Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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