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Wyszukujesz frazę "Mahapatra, S." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Application of fuzzy based VIKOR approach for multi-attribute group decision making (MAGDM): a case study in supplier selection
    Autorzy:
    Samantra, Ch.
    Datta, S.
    Mahapatra, S. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/375940.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    supplier selection
    MAGDM
    fuzzy set theory
    VIKOR method
    Opis:
    In today´s competitive global markets, selection of a potential supplier plays an important role to cut production costs as well as material costs of the company. This leads to successful survival and sustainability in a competitive marketplace. Therefore, evaluation and selection of an appropriate supplier has become an important part of supply chain management. The nature of the supplier selection process is a complex multi-attribute group decision making (MAGDM) problem which deals with both quantitative and qualitative factors may be conflicting in nature as well as contain incomplete and uncertain information. In order to solve such a kind of MAGDM problems, the development of an effective supplier selection model is evidently desirable. In this paper, an application of the VIKOR method combined with fuzzy logic has been used to solve supplier selection problems with conflicting and non-commensurable (different units) criteria, assuming that compromising is acceptable for conflict resolution. The decision maker wants a solution, which must be closest to the ideal, and the alternatives are evaluated according to all established criteria. Linguistic values are used to assess the ratings and weights for the conflicting factors. These linguistic ratings can be expressed in triangular fuzzy numbers. Then, a hierarchy MAGDM model based on fuzzy sets theory and the VIKOR method has been proposed to deal with the supplier selection problems in the supply chain system. A case study has been illustrated as an application of the proposed model.
    Źródło:
    Decision Making in Manufacturing and Services; 2012, 6, 1-2; 25-39
    1896-8325
    2300-7087
    Pojawia się w:
    Decision Making in Manufacturing and Services
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of a Fuzzy Inference System for the Optimization of Material Removal Rate and Multiple Surface Roughness Characteristics in the Machining of GFRP Polyester Composites
    Autorzy:
    Singh, A.
    Datta, S.
    Mahapatra, S. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/375921.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    GFRP
    DOE
    Fuzzy Inference System (FIS)
    Taguchi method
    Opis:
    This paper presents a multi-objective extended optimization methodology applied in the machining of a randomly oriented GFRP rod. Design of Experiment (DOE) has been selected based on a L9 orthogonal array design with varying process control parameters like: spindle speed, feed rate and depth of cut. Multiple surface roughness parameters of the machined FRP product along with the Material Removal Rate (MRR) of the machining process have been optimized simultaneously. The Fuzzy Inference System (FIS) has been proposed for providing feasible means for the meaningful aggregation of multiple objective unctions into an equivalent single performance index (MPCI). This Multi-Performance Characteristic Index (MPCI) has been optimized using the Taguchi method. The approach adapted here is capable of overcoming limitations/assumptions of existing optimization methodologies available in the literature.
    Źródło:
    Decision Making in Manufacturing and Services; 2013, 7, 1-2; 19-42
    1896-8325
    2300-7087
    Pojawia się w:
    Decision Making in Manufacturing and Services
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CdSe/ZnSe Quantum Dots Formed by Low Temperature Epitaxy and In-Situ Annealing: Properties and Growth Optimization
    Autorzy:
    Mahapatra, S.
    Schumacher, C.
    Kiessling, T.
    Astakhov, G. V.
    Bass, U.
    Ossau, W.
    Geurts, J.
    Brunner, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044500.pdf
    Data publikacji:
    2005-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.16.Dn
    81.05.Dz
    73.21.La
    Opis:
    The formation of CdSe/ZnSe quantum dots by a method combining a low temperature MBE growth of a CdSe layer and its subsequent in-situ annealing at temperatures between 280-340ºC has been studied. The thermal treatment results in a re-organization of the surface from a nearly two-dimensional layer to an ensemble of three-dimensional dot-like features. In this work we optimized the different growth and annealing parameters of this process and compared the properties of the resultant dots with those of dots grown by conventional MBE at 300ºC. It is demonstrated that the luminescence properties of the dots for both growth techniques are comparable but the areal density achieved by the in-situ annealing technique is an order of magnitude lower. From high resolution X-ray diffraction results, it could be established that no desorption takes place despite significantly long annealing duration. Beyond a nominal coverage of 3.5 ML CdSe, stacking faults are generated, leading to a gradual decrease in luminescence intensities and an overlap of pendellösung fringes in X-ray diffractograms.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 5; 769-776
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Appraisal of awareness on medical emergencies and its management among dentists in Bhubaneswar, India
    Autorzy:
    Nagarajappa, R.
    Mahapatra, I.
    Satyarup, D.
    Mohanty, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086122.pdf
    Data publikacji:
    2021
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    dentist
    medical emergencies
    management
    questionnaire
    Opis:
    Background. Medical emergencies can be distressing for any dental professional, whether in a dental practice, hospital or other sites. Objectives. To assess the knowledge and awareness of dental practitioners towards medical emergencies and its management in Bhubaneswar. Material and Methods. In this cross-sectional investigation, a self-administered questionnaire which included demographic details and 19 questions regarding knowledge about medical emergencies, was disseminated to a random sample of 183 dentists working in their private dental clinic set up in Bhubaneswar. Chi-square test was used for statistical analysis. Results. Total sample size was 183, out of which 79 (43.17%) were males and 104 (56.83%) were females. The mean age was found out to be 30.7 ± 5.38 years. Practically 96% of the practitioners were not certain enough to deal with the emergency conditions at dental office. Around 67% had not attended any workshop on emergency training. It was amazing to observe that larger part (90%) of the experts didn't possess first aid kit at their dental office. In instances of handling emergency situation at the dental chair no statistical significance (p>0.05) with respect to age and gender was found. Conclusion. This investigation showed that hypothetically dental professionals had better knowledge on medical emergencies yet at the same time they were not equipped efficiently to manage the same at their workplace.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2021, 72, 2; 193-201
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Grit Blasting and Thermal Spraying on Microstructure Evolution of P91 Weldment
    Autorzy:
    Thakare, J. G.
    Pandey, C.
    Mulik, R. S.
    Mahapatra, M. M.
    Narang, H. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/947576.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    P91
    HAZ
    IC-HAZ
    deformation zone
    Opis:
    In the present work, studies have been carried out on the variations in the microstructure and hardness of P91 base-metal and welded joint. This variations result from the grit blasting and thermal cycle experienced during the thermal spraying process. The microstructural effects have been analyzed in terms of the depth of the deformation zone. Scanning Electron Microscopy and Xray diffraction were used as characterization techniques. The grit blasting carried out prior to thermal spraying has resulted in the highest change in sub-surface hardness of the heat affected zone (HAZ). However, flame treatment further reduced the subsurface hardness of the heat affected zone. The depth of deformation zone was highest for inter-critical heat affected zone (IC-HAZ). The overall coating process resulted in an increase in subsurface hardness of various regions of HAZ and fusion zone (FZ). The base metal showed a 7% increase in subsurface hardness due to the overall coating process. The IC-HAZ showed maximum variation with 36% increase in subsurface hardness. The coarse grained heat affected zone (CG-HAZ) and FZ did not show any change in subsurface hardness. As a whole, the hardness and microstructure of the welded joint was observed to be more sensitive to the thermal spray coating process as compared to the base metal.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1725-1734
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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