Autor: Mishra, S. K. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Application of a particle swarm optimization to a physically-based erosion model
Zastosowanie optymalizacji zbioru rozproszonych czasteczek do modelu erozji opartego na podstawach fizycznych
Autorzy:: Santos, C A G
Pinto, L.E.M.
De Macedo Machado Freire, P.K.
Mishra, S.K.
Powiązania:: https://bibliotekanauki.pl/articles/81761.pdf
Data publikacji:: 2010
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: particle swarm optimization
application
erosion model
erosion simulation
run-off
optimization
erosion parameter
Opis:: The difficulties involved in calibration of physically based erosion models have been partly attributable to the lack of robust optimization tools. This paper presents the essential concepts and application to optimize channel and plane parameters in an erosion model, with a global optimization method known as Repulsive Particle Swarm (RPS), a variant of Particle Swarm Optimization (PSO) method. The physically-based erosion model that which was chosen is called WESP (watershed erosion simulation program). The optimization technique was tested with the field data collected in an experimental watershed located in a semi-arid region of Brazil. On the basis of these results, the recommended erosion parameter values for a semi-arid region are given, which could serve as an initial estimate for other similar areas.
Trudności w kalibracji modeli erozji opartych na podstawach fizycznych przyczyniły się do braku ogólnych narzędzi optymalizacji. W pracy przedstawiono podstawowe koncepcje i zastosowanie do zoptymalizowania parametrów kanału i płaszczyzny w modelu erozji, globalną metodą optymalizacji znaną jako Repulsive Particle Swarm (RPS), wariantem metody Particle Swarm Optimisation (SPO). Fizycznie uzasadniony model erozji, który został wybrany jest nazywany WESP (watershed erosion simulation program). Technika optymalizacji została wypróbowana na danych terenowych zebranych w zlewni eksperymentalnej zlokalizowanej w umiarkowanie suchym regionie Brazylii. Na podstawie tych wyników przedstawiono wartości rekomendowanego parametru erozji dla umiarkowanie suchego regionu, który może służyć jako początkowe oszacowanie dla podobnych obszarów.
Źródło:: Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 39-49
0208-5771
Pojawia się w:: Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of Tungsten on Aluminized Melt Cast High Explosive Formulations
Autorzy:: Mishra, V. S.
Bhagat. A., L.
Vadali, S. R.
Singh, V. K.
Wasnik, R. D.
Asthana, S.
Powiązania:: https://bibliotekanauki.pl/articles/358355.pdf
Data publikacji:: 2012
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: tungsten
MOUT
low intensity conflict
peak over pressure
impulse
Opis:: Aluminized 2,4,6-trinitrotoluene (TNT) based, melt-cast, high explosive compositions are widely used in warheads. These compositions offer a blast effect over a larger period due to the secondary combustion of aluminum. During recent times tungsten based explosives have been reported for lethality at close range to avoid collateral damage in low intensity conflicts (LIC) and find application in shaped charges to enhance their penetration capability. This paper reports findings on tungsten-based, melt-cast, explosive formulations. The compositions were prepared by substituting aluminum with tungsten in the reference aluminized, high explosive formulation. The compositions were characterized for their sensitivity to mechanical/shock stimuli, velocity of detonation (VOD) and blast performance. The study reveals that the impact sensitivity remains comparable on incorporating 10% tungsten at the cost of aluminum whereas an increase in tungsten content to 20% leads to an increase in impact sensitivity. However friction sensitivity and shock sensitivity remained more or less unchanged. The velocity of detonation (VOD) of tungsten-loaded, aluminized formulations is found to be comparable to the standard aluminized formulation. The peak over pressure of tungsten-based formulations is lower than the reference, aluminized composition at close range but is almost unchanged at long range. The impulse of tungsten-based formulations is also lower than the reference, aluminized composition. The reduction in impulse at close range is substantial on replacing 10% aluminum with inert tungsten.
Źródło:: Central European Journal of Energetic Materials; 2012, 9, 2; 147-154
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Role of abiotic factors on seasonal abundance and Infestation of fruit fly, Bactrocera cucurbitae (COQ.) on bitter gourd
Autorzy:: Raghuvanshi, A.K.
Satpathy, S.
Mishra, D.S
Powiązania:: https://bibliotekanauki.pl/articles/66279.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: Throughout the year, there was an abundance of fruit flies in Cue-lure baited traps. Two peaks; in summer and kharif (Autumn) coincided with the 14 SW and 43 SW respectively. In kharif, maximum bitter gourd fruit damage (62.70%) occurred in the 45 SW. A second peak, with 49.70% fruit damage was observed during the 15 SW period. The temperature (maximum and minimum) showed a significant positive correlation with adult abundance, fruit damage and pupal population. The temperature recorded during the preceding first, second and third weeks had a slightly greater impact than the temperature of the current week in which the fruit fly abundance had been checked. Other abiotic factors had a non-significant effect on fruit fly adult activity, fruit damage and pupal population.
Źródło:: Journal of Plant Protection Research; 2012, 52, 2
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Studies on FOX-7 Based Melt Cast High Explosive Formulations
Autorzy:: Mishra, V. S.
Vadali, S. R.
Garg, R. K.
Joshi, V. S.
Wasnik, R. D.
Asthana, S.
Powiązania:: https://bibliotekanauki.pl/articles/358915.pdf
Data publikacji:: 2013
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: melt cast
FOX-7
LOVEX
shock sensitivity
VOD
impulse
IMs
Opis:: The key driving force in modern explosive research is the development of low vulnerable high explosive (LOVEX) compositions for future applications in insensitive munitions (IMs). The increasing demand for LOVEX has led to exhaustive studies on low vulnerable explosives as a replacement for conventional cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX) in 2,4,6-trinitrotoluene (TNT) melt cast high explosive formulations. In the present study, 1,1-diamino-2,2dinitroethene (FOX-7) has been evaluated as a possible RDX replacement in TNT based, non-aluminized as well as aluminized, melt cast formulation. FOX-7 based melt cast formulations were characterized for their sensitivity to mechanical/shock stimuli, velocity of detonation (VOD), blast parameters and thermal decomposition behavior. These characteristics are compared with the corresponding RDX based compositions as reference standard. The studies show that with little sacrifice on performance parameters, FOX-7 based, non-aluminized and aluminized, melt cast formulations are found to be less vulnerable, compared with the corresponding RDX based formulations.
Źródło:: Central European Journal of Energetic Materials; 2013, 10, 4; 569-580
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: A report on occurrence of Neofusicoccum sp. in Carallia brachiata (Lour.) Merr. trees from Karnataka, India
Autorzy:: Muthu Kumar, A.
Pandey, A.K.
Mishra, G.
Rao, S.
Powiązania:: https://bibliotekanauki.pl/articles/11572.pdf
Data publikacji:: 2015
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:: Carallia brachiata (Lour.) Merr. is one of the soft woody species occurring all along the Western Ghats region of Kundapura, Karnataka, India. The species is considered to be a potent medicinal plant exclusively used against itch and septic poisoning. A study was under gone based on the report of forest department (Karnataka) on mortality of Carallia brachiata. Observation of symptoms on the infected trees and experimental analysis of the samples under laboratory conditions revealed the incidence of Neofusicoccum sp., a first report on Carallia brachiata. This particular Neofusicoccum sp. belongs to Botryospaeriaceae family, and is considered to be an important fungal pathogen associated with tree decline in forest and plantation worldwide.
Źródło:: International Letters of Natural Sciences; 2015, 04
2300-9675
Pojawia się w:: International Letters of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Global scenario of Acrocarpus fraxinifolius Wight and Arn. - A future tree of Agro forestry
Autorzy:: Mishra, G.
Pandey, A.K.
Arunachalam, M.K.
Rao, S.
Powiązania:: https://bibliotekanauki.pl/articles/11909.pdf
Data publikacji:: 2015
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:: Acrocarpus fraxinifolius portrait one among the mainstay of agro forestry in Asian tropics. The lofty tree fortified a substantial impact in every horizon of life. The evergreen, deciduous tree of Fabaceae family stands tall about 30-60 m endowed with unique properties which idiosyncrasies it in the plant kingdom. Surpassing the adverse climatic conditions, A. fraxinifolius serves as a shade tree for tea and coffee plantation and epitomises as a multipurpose avenue tree culminating to the culture of agro forestry. Mundani in bloom is a spectacular appearance bestowed with scarlet crimson red flowers attracting infinite migratory birds and insects. The ancestral gene with indelible memory gravitate this extraordinary majestic tree to aestivate and adapt to strongest survive.
Źródło:: International Letters of Natural Sciences; 2015, 03
2300-9675
Pojawia się w:: International Letters of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Studies on NTO-, FOX-7- and DNAN-based Melt Cast Formulations
Autorzy:: Mishra, V. S.
Vadali, S. R.
Bhagat, A. L.
Garg, R. K.
Kugaonkar, V. M.
Raman, S.
Sinha, R. K.
Asthana, S.
Powiązania:: https://bibliotekanauki.pl/articles/358500.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: melt cast
DNAN
TNT
FOX-7
NTO
RDX/TNT
VOD
sensitivity
Opis:: In the present paper, 2,4-dinitroanisole (DNAN) has been evaluated as a melt cast explosive in comparison to the widely used 2,4,6-trinitrotoluene (TNT). The detonation failure diameter of a bare DNAN charge is greater than 100 mm and about 44 mm with 1.5 mm steel confinement. Comparative studies of two sets of formulations were carried out. The first set comprised formulations containing 60% of NTO, FOX-7, HMX or RDX and 40% of DNAN or TNT. The second set comprised formulations containing 30% of NTO, FOX-7, TATB or RDX and 70% of DNAN or TNT. The studies were mainly concentrated on characterization of the formulations, which included determination of the sensitivity parameters and the velocity of detonation (VOD). The study confirmed that DNAN and DNAN-based formulations are relatively insensitive compared to TNT and the analogous TNT-based formulations respectively. The rate of the detonation reaction of DNAN is enhanced in the presence of the high energy ingredients RDX, HMX, FOX-7 and NTO to varying degrees. The VODs of the FOX-7/TNT and RDX/TNT formulations match closely with the proportions of FOX-7 and RDX under study. The VOD and shock sensitivity of the FOX-7/DNAN formulations decrease rapidly compared to the RDX/DNAN formulations, with increases in the proportion of FOX-7 or RDX. The combinations of NTO with TNT, and NTO with DNAN, are more shock insensitive than TNT or DNAN alone. NTO-based compositions are more insensitive than FOX-7-based compositions.
Źródło:: Central European Journal of Energetic Materials; 2017, 14, 2; 403-417
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

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

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Skocz do pozycji: 9.

Tytuł:: Chatter detection using principal component analysis in cold rolling mill
Autorzy:: Usmani, N. I.
Kumar, S.
Velisatti, S.
Tiwari, P. K.
Mishra, S. K.
Patnaik, U. S.
Powiązania:: https://bibliotekanauki.pl/articles/329460.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: chatter
principal component analysis
PCA
cold rolling
vibration
drgania samowzbudne
analiza składowych głównych
walcowanie na zimno
drgania
Opis:: Most cold rolling mills are prone to chatter problem. Chatter marks are often observed on the strip surface in cold rolling mill leading to downgrade and rejection of rolled material. Chatter impact product quality as well as productivity of mill. In absence of online chatter detection no corrective action can be taken immediately and whole campaign gets affected. Most conventional approach for online chatter detection is by using vibration measurement of mill stands in time & frequency domain. Present work proposes two approaches to detect chatter in cold rolling mill using a statistical technique called Principal Component Analysis (PCA). In this paper two methods are used for chatter detection. First method applies PCA on Fast Fourier Transform (FFT) to differentiate between chatter and non-chatter condition. Second method applies PCA on statistical parameters calculated from raw vibration data to detect chatter.
Źródło:: Diagnostyka; 2018, 19, 1; 73-81
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Investigating the role of air-sea forcing on the variability of hydrography, circulation, and mixed layer depth in the Arabian Sea and Bay of Bengal
Autorzy:: Srivastava, A.
Dwivedi, S.
Mishra, A.K.
Powiązania:: https://bibliotekanauki.pl/articles/48693.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: seasonal variability
hydrography
circulation
Arabian Sea
Bengal Bay
general circulation model
Źródło:: Oceanologia; 2018, 60, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Optimality conditions and duality for generalized fractional minimax programming involving locally Lipschitz (b,Ψ,Φ,ρ) -univex functions
Autorzy:: Antczak, T.
Mishra, S. K.
Upadhyay, B. B.
Powiązania:: https://bibliotekanauki.pl/articles/206666.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: generalized fractional minimax programming
locally Lipschitz (b,Ψ,Φ,ρ)-univex function
optimality conditions
duality
Opis:: In this paper, we are concerned with optimality conditions and duality results of generalized fractional minimax programming problems. Suﬃcient optimality conditions are established for a class of nondiﬀerentiable generalized fractional minimax programming problems, in which the involved functions are locally Lipschitz (b,Ψ,Φ,ρ)-univex. Subsequently, these optimality conditions are utilized as a basis for constructing various parametric and nonparametric duality models for this type of fractional programming problems and proving appropriate duality theorems.
Źródło:: Control and Cybernetics; 2018, 47, 1; 5-32
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Nanofluid motion past a shrinking sheet in porous media under the impact of radiation and heat source/sink
Autorzy:: Sharma, R. P.
Jha, A. K.
Gaur, P. K.
Mishra, S. R.
Powiązania:: https://bibliotekanauki.pl/articles/264665.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: magnetohydrodynamika
promieniowanie cieplne
wytwarzanie ciepła
MHD
nanofluid
shrinking surface
thermal radiation
heat generation
porous medium
Opis:: An investigation has been carried out for the MHD 3-dimensional flow of nanofluid over a shrinking sweet saturating a porous media in the presence of thermal radiation and heat generation. Convective boundary conditions for the flow phenomena are used in the present analysis. The governing equations are reduced to ODEs employing suitable similarity transformations. The solutions of formulated differential equations have been attained mathematically by fourth order R-K technique along with the shooting method. The impact of the governing constraints on momentum, heat, and local Nusselt number, are explored. It is noticed that the momentum and heat decrease with raise in the porosity variable, temperature reduces with an enhance in the thermal radiation variable, and temperature enhances with an enhance in the heat source/sink parameter.
Źródło:: International Journal of Applied Mechanics and Engineering; 2019, 24, 4; 183-199
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Melanin production by Pseudomonas sp. and in silico comparative analysis of tyrosinase gene sequences
Autorzy:: Deepthi, S.S.
Reddy, M.K.
Mishra, N.
Agsar, D.
Powiązania:: https://bibliotekanauki.pl/articles/2096822.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Pseudomonas sps.
Homo sapiens
natural pigment
melanogenic genes
common central domain
Opis:: Background . Melanin finds enormous applications in different industries for its unique photoprotective and anti-oxidant properties. Due to its emerging demand, scientific researchers are putting efforts to unravel more microorganisms with a potential of producing melanin on large scale. Hence, the present study was aimed at the isolation of extracellular melanin producing microorganisms from lime quarries of Karnataka, India. Besides this, the tyrosinase gene governing melanin synthesis in different organisms were compared in silico to understand its evolutionary aspects. Material and methods . Melanin producing microorganisms were screened on tyrosine gelatin beef extract agar medium. Potential isolate was explored for submerged production of melanin in broth containing L-tyrosine. Melanin was characterized by UV-Vis spectroscopy, thin layer and high performance liquid chromatographic techniques. Antibacterial activity of melanin was performed by agar well assay. Comparative tyrosinase gene sequence analysis was performed by using Geneious 2021.1 trial version software. Results . Pseudomonas otitidis DDB2 was found to be potential for melanin production. No antibacterial activity was exerted by the melanin against tested pathogens. The in silico studies showed that the common central domain of tyrosinase protein sequence of selected Pseudomonas sps. exhibited 100% identity with the common central domain of Homo sapiens tyrosinase (NP_000363.1). Conclusions . Our study shows the production of melanin in good quantities by the isolate Pseudomonas otitidis DDB2 which can be explored for scale-up process. Since the melanin formed is of eumelanin type and the tyrosinase gene sequence of several Pseudomonas sp. showed relatedness to humans, this molecule may be further developed for sunscreen formulations.
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2021, 102, 4; 411-424
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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