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Wyświetlanie 1-10 z 11
Tytuł:
Unsteady convection flow of a magnetomicropolar fluid past a vertical porous plate
Autorzy:
Jain, N. C.
Gupta, P.
Sharma, B.
Powiązania:
https://bibliotekanauki.pl/articles/266073.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
źródło ciepła
pole magnetyczne
materiały porowate
prędkość poślizgu
heat source/sink
magnetic field
porous medium
slip velocity
unsteady
vertical plate
Opis:
The paper deals with an unsteady two dimensional laminar slip flow of a viscous incompressible magnetomicropolar fluid past a semi infinite porous plate embedded in a porous medium. The flow is under the influence of a transverse magnetic field and heat source/sink. The free stream velocity follows an exponentially increasing or decreasing small perturbation law. The porous surface absorbs the fluid with time varying suction velocity. Expressions are obtained for velocity and temperature fields, mean angular velocity, skin friction and the Nusselt number.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 1; 43-53
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A generalized hypergeometric polynomial
Autorzy:
Jain, R. N.
Powiązania:
https://bibliotekanauki.pl/articles/715369.pdf
Data publikacji:
1967
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Annales Polonici Mathematici; 1967, 19, 2; 177-184
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of an M/M/1/N feedback queue with retention of reneged customers
Autorzy:
Kumar, R.
Jain, N. K.
Som, B. K.
Powiązania:
https://bibliotekanauki.pl/articles/969064.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
reneging
retention of reneged customers
revenue
queuing system
optimization
dochód
system kolejkowania
optymalizacja
Opis:
Customer impatience has become a threat to the business world. Firms employ various customer retention strategies to retain their impatient (or reneged) customers. Customer retention mechanisms may help to retain some or all impatient customers. Further, due to unsatisfactory service, customers may rejoin a queue immediately after departure. Such cases are referred to as feedback customers. Kumar and Sharma take this situation into account and study an M/M/1/N feedback queuing system with retention of reneged customers. They obtain only a steady-state solution for this model. In this paper, we extend the work of Kumar and Sharma by performing an economic analysis of the model. We develop a model for the costs incurred and perform the appropriate optimization. The optimum system capacity and optimum service rate are obtained.
Źródło:
Operations Research and Decisions; 2014, 24, 3; 45-58
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of scopoletin and mangiferin in botanicals and formulations of Shankhpushpi by HPLC
Autorzy:
Nahata, A.
Sethiya, N.K.
Jain, N.
Dixit, V.K.
Powiązania:
https://bibliotekanauki.pl/articles/71638.pdf
Data publikacji:
2018
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Opis:
Introduction: Shankhpushpi has been widely used in traditional Indian systems of medicine as a brain and memory boosting tonic. There are a variety of botanicals reported to be used as sources of Shankhpushpi in various parts of India. For instance, Canscora decussata Schult, Clitorea ternatea Linn., Convolvulus pluricaulis Choisy. and Evolvulus alsinoides Linn. are most commonly used as sources of Shankhpushpi by practitioners of Ayurveda in different parts of the country. Objective: When it comes to using Shankhpushpi in herbal formulations, qualitative and quantitative analysis of the correct botanicals in the formulation decides its pharmacological effectiveness. Scopoletin and mangiferin are proven bioactive markers identified in Shankhpushpi botanicals in our previous studies. Hence the study is aimed at providing a simple analytical method for the identification of the correct variety of Shankhpushpi using proven markers. Methods: In this study, a High Performance Liquid Chromatographic (HPLC) method has been developed for the estimation of scopoletin and mangiferin levels in four botanicals of Shankhpushpi and their marketed formulations. Result: A simple analytical method was developed which proved to be very crucial in estimating concentrations of mangiferin and scopoletin in various test samples. This method can be used to identify the correct botanicals of Shankhpushpi present in any Ayurvedic formulation or raw material or processed powder by evaluating the content of scopoletin or mangiferin as markers. Conclusion: The developed HPLC method is a quick and reliable method for the quantitative monitoring of mangiferin and scopoletin in herbal extracts and marketed formulations of Shankhpushpi.
Źródło:
Herba Polonica; 2018, 64, 4
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lease price differentiation and its influence on the attraction of micro, small and medium enterprises’ (MSMEs) to major shopping malls in Zambia
Zróżnicowanie cen najmu i jego wpływ na przyciąganie mikro-, małych i średnich przedsiębiorstw (MMŚP) do dużych galerii handlowych w Zambii
Autorzy:
Jain, N.
Chileshe, R.A.
Munshifwa, E.K.
Mushinge, A.
Chisha, A.
Powiązania:
https://bibliotekanauki.pl/articles/2048608.pdf
Data publikacji:
2021
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
lease price differentiation
Zambia
micro, small and medium enterprises' (MSMEs)
shopping mall rentals
Opis:
Subject and purpose of work: Based on community-wide charges that shopping malls discriminate against small business tenants, this paper seeks: firstly to identify the principal determinants of shopping mall rentals, and secondly to understand if there exists a statistically significant dispersion in rentals against MSMEs. Materials and methods: Relative Importance Index and SPSS (statistical tests) were used to analyze the survey-based data which was acquired from eleven shopping malls in Lusaka. Results: The MSME tenants pay on average $20.32/m2 more than anchor tenants and $19.12/m2 more than chain stores, ironically on account of capital limitations. MSMEs also face an additional risk during sudden economic shocks due to untenable lease provisions and poor negotiating influence. Conclusions: The study concludes by acknowledging that the MSME sector is covertly vitiated by the imposition of high rental premiums. It recommends that shopping malls should have an affirmative simpler letting policy. Furthermore, a shopping mall association should-be commissioned to exclusively safeguard the interests of MSMEs.
Źródło:
Economic and Regional Studies; 2021, 14, 3; 358-372
2083-3725
2451-182X
Pojawia się w:
Economic and Regional Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An extension of line spring model for vibration analysis of thin isotropic plate containing multiple part-through cracks: an analytical approach
Autorzy:
Jain, N. K.
Gupta, A.
Salhotra, R.
Rawani, A. M.
Soni, S.
Mishra, A.
Joshi, P. V.
Powiązania:
https://bibliotekanauki.pl/articles/128046.pdf
Data publikacji:
2018
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
multiple cracks
Line Spring Model
vibration
partial crack
pęknięcie wielokrotne
sprężyna liniowa
drgania
pęknięcie częściowe
Opis:
In the present study, the effect of multiple part-through cracks on the vibration characteristics of thin isotropic rectangular plate is presented. The proposed analytical model is developed using Kirchhoff’s classical plate theory and the crack terms are formulated using the simplified Line Spring Model (LSM). The application of Berger's formulation helps to transform the derived governing equation in the form of well known Duffing equation with cubic nonlinearities and then the solution for final governing equation is obtained using Galerkin's method for two different boundary conditions. The fundamental frequency of the plate as affected by the number of cracks, cracks length, cracks orientation, and plate aspect ratio for different boundary condition is presented. It is found that the results obtained for natural frequencies are maximally affected by number of cracks, crack length and orientations.
Źródło:
Vibrations in Physical Systems; 2018, 29; 1-25
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 11

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