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Wyświetlanie 1-15 z 27
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
Artykuł
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
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
Tytuł:
An overview of current research trends on graphene and it’s applications
Autorzy:
Krishna, R. S.
Mishra, Jyotirmoy
Das, Shaswat Kumar
Mustakim, Syed Mohammed
Powiązania:
https://bibliotekanauki.pl/articles/1068613.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Concrete
Doping
Electrical
Graphene
Material
Mechanical
Properties
Sustainability
Opis:
Graphene is no doubt called a wonder-material due to its outstanding superlative traits. It has its application near about in every field. Its properties are extraordinary and different from any day-to-day material. Albeit bearing such qualities, its structure is rather simple than most individuals cerebrate of. It has a thickness of an atom. It is a two-dimensional carbon arranged in a honeycomb crystal structure. It could transmute the way we view, in numerous fields of science. Its applications can be an asset to a greener environment for which Graphene engineered cement/concrete composites have an immense potential in the present times when sustainable construction materials are the need of the hour. Graphene can act as a good adsorbent for pollutant abstraction due to its high surface area. Either alone or in coalescence with different materials, it very well may be used for the debasement or deliberation of a sizably voluminous assortment of contaminants through a few strategies. Incipient heights can be achieved as the list of operations for graphene is virtually illimitable. Utilization of graphene in the coming years will give inundating difference to current technologies. This paper fixates on the applications and developments of Graphene in fields like Electronics, Batteries, Filtration, Medicine, Construction, and Composites.
Źródło:
World Scientific News; 2019, 132; 206-219
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rising Demand for Rain Water Harvesting System in the World: A Case Study of Joda Town, India
Autorzy:
Krishna, R. S.
Mishra, Jyotirmoy
Ighalo, Joshua O.
Powiązania:
https://bibliotekanauki.pl/articles/1031604.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Groundwater
Harvesting
Joda
Rainwater
Water Resources Management
Opis:
Worldwide, annual water demand has been increased for different uses. This can be attributed to population expansion and the accompanying need to satisfy their water needs for domestic, agricultural, and industrial purposes. The situation has been becoming worst due to vulnerable and inefficient water supply systems. Rainwater harvesting (RWH) has been proved to be a sustainable option in solving the on-ground water shortage to a great extent. India has been facing the wrath of a water crisis for about a decade or two. The potential of RWH in India is more due to its geographical location and landscape. This paper aims at studying the impact of adopting RWH techniques as an artificial recharge option to evaluate groundwater table in the Joda town of India by analyzing the difference in water levels of the township throughout the past decade (2009-19). The study revealed the increase in the underground water level of the study area and established that RWH systems are crucial in arid regions to a large extent.
Źródło:
World Scientific News; 2020, 146; 47-59
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and antimicrobial activity of coumarinyl Schiff base derivatives
Autorzy:
Mishra, A.
Rathod, J.
Namera, D.
Thakrar, S.
Shah, A.
Powiązania:
https://bibliotekanauki.pl/articles/411623.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
gram positive bacterial
gram negative bacterial
derivatives of coumarin
Opis:
We have reported some novel N’-[(1)-ethylidene]-2-(6-methyl-2-oxo-2H-chromen-4-yl) acetohydrazide synthesized by conventional method. The reaction of 2-(6-methyl-2-oxo-2H-chromen-4-yl)acetohydrazide with substituted benzaldehyde in methanol as a solvent yielded a series of (7a-l). The structures of all synthesized compounds are well characterized by Mass, FT-IR, 1H NMR, 13C NMR and elemental analysis. Moreover, all synthesized compounds were screened for in vitro antimicrobial activity against the gram positive (Staphylococcus aureus, Bacilluas subtilis) and gram negative (Escherichia coli, P. aeruginosa, K. pneunonae, Enterobacter) bacterial strain. In which some the compounds show potential inhibition against the test organisms.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 11, 3; 193-201
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Efficacy of Lepidium Sativum to act as an anti-diabetic agent
Autorzy:
Mishra, N.
Mohammed, A.
Rizvi, S.I.
Powiązania:
https://bibliotekanauki.pl/articles/1918412.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Lepidium sativum
diabetes
insulin
streptozotocin
oxidative stress
cholesterol
Opis:
Objective: Lepidium sativum, commonly known as chandrashoor in India, has been used in the Indian traditional medicine system for the treatment of various diseases. The present study was undertaken to investigate the hypoglycemic effect of Lepidium sativum in normal and streptozotocin-induced diabetic rats. Materials and methods: Thirty (30) adult male Wistar rats weighing 157±51g were randomly assigned to five groups of six rats each as Normal control, Diabetic control, Diabetics supplemented with Lepidium sativum extract, Diabetics treated with insulin, and Normal rats supplemented with Lepidium sativum. All rats were fed with a normal laboratory diet, nutrient rich pellets, and had free access to drinking water. The rats were injected with streptozotocin at a dose of 45 mg/kg body weight intraperitoneally to induce diabetes. The extracts were then given orally to different groups of rats at a dose of 20mg/kg body weight for 16 days. Thereafter, the rats were sacrificed, and blood samples collected by cardiac puncture were used for the determination of Glucose, Creatinine, Alkaline Phosphatase, Cholesterol, Malondialdehyde level, % DPPH, and FRAP content. Results: Administration of lepidium extract showed a significant reduction in glucose, creatinine, and alkaline phosphatase levels. Elevated cholesterol level was restored approximately to normal; a significant decrease in malondialdehyde levels was also observed compared to diabetic controls. Conclusion: Lepidium sativum extract shows efficacy in the prevention and management of diabetes mellitus and its related complications.
Źródło:
Progress in Health Sciences; 2017, 7(1); 44-53
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance characteristics of low global warming potential R134a alternative refrigerants in ejector-expansion refrigeration system
Autorzy:
Mishra, S.
Sarkar, J.
Powiązania:
https://bibliotekanauki.pl/articles/240184.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
eco-friendly refrigerant
two-phase ejector
optimization
COP
area ratio
critical temperature
ekologiczny czynnik chłodniczy
strumienica dwufazowa
optymalizacja
stosunek powierzchni
temperatura krytyczna
Opis:
Performance assessment of ejector-expansion vapor compression refrigeration system with eco-friendly R134a alternative refrigerants (R152a, R1234yf, R600a, R600, R290, R161, R32, and propylene) is presented for air-conditioning application. Ejector has been modeled by considering experimental data based correlations of component efficiencies to take care of all irreversibilities. Ejector area ratio has been optimized based on maximum coefficient of performance (COP) for typical air-conditioner operating temperatures. Selected refrigerants have been compared based on area ratio, pressure lift ratio, entrainment ratio, COP, COP improvement and volumetric cooling capacity. Effects of normal boiling point and critical point on the performances have been studied as well. Using ejector as an expansion device, maximum improvement in COP is noted in R1234yf (10.1%), which reduces the COP deviation with R134a (4.5% less in basic cycle and 2.5% less in ejector cycle). Hence, R1234yf seems to be best alternative for ejector expansion system due to its mild flammability and comparable volumetric capacity and cooling COP. refrigerant R161 is superior to R134a in terms of both COP and volumetric cooling capacity, although may be restricted for low capacity application due to its flammability.
Źródło:
Archives of Thermodynamics; 2016, 37, 4; 55-72
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Floral morphology and HPTLC fingerprint profile of Saraca asoca (Roxb.) De Wilde (Caesalpiniaceae): A consecrated tree of India
Autorzy:
Mishra, S.B.
Vijayakumar, M.
Powiązania:
https://bibliotekanauki.pl/articles/11140.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
Pharmacognosy of the flowers of Saraca asoca (Roxb.) De Wilde has been carried out to lay down standards for the genuine drug Ashoka with the detailed anatomy of various floral appendages. The aim of the present study is to determine the physico-chemical profile, preliminary phytochemical screening, fluorescence analysis and chemical composition by HPTLC of the medicinally important plant Saraca asoca. These observations would be of immense value in the botanical identification and standardization of the drug in crude form. This study would help distinguish the drug from its other species.
Źródło:
International Letters of Natural Sciences; 2015, 43
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Augmenting human potential at work : an investigation on the role of self-efficacy in workforce commitment and job satisfaction
Zwiększanie potencjału ludzkiego w pracy : badanie roli własnej skuteczności w zaangażowaniu siły roboczej i zadowoleniu z pracy
Autorzy:
Mishra, U. S.
Patnaik, S.
Mishra, B. B.
Powiązania:
https://bibliotekanauki.pl/articles/404864.pdf
Data publikacji:
2016
Wydawca:
Politechnika Częstochowska
Tematy:
self-efficacy
job satisfaction
commitment
steel company
poczucie własnej skuteczności
zadowolenie z pracy
zaangażowanie
firma hutnicza
Opis:
The prime purpose of this study is to evaluate the role of self-efficacy in job satisfaction and employee commitment. Self-efficacy refers to individual’s conviction in their ability to successfully execute a given task (Bandura, 1997). Ensuring job satisfaction and increasing employee commitment are important issues faced by organizations. Results of this study depict that self-efficacy is significantly and positively associated with job satisfaction and commitment. Findings of the study have got implication on gaining competitive advantage. Contemporary scholars argue that obtaining competitive advantage through traditional resources is not sustainable as proprietary information, economic resources, and technology are available. Self-efficacy being a positive psychological resource is not easily replicable by competitors and thus can serve as a source of competitive advantage. Further, self-efficacy training can be devised to enhance self-efficacy in employees. Improvement in self-efficacy is likely to foster growth in self-leadership behavior, commitment, job satisfaction, and performance.
Głównym celem tego badania jest ocena roli własnej skuteczności w satysfakcji z pracy i zaangażowania pracowników. Poczucie własnej skuteczności odnosi się do przekonania jednostki w jej zdolność do pomyślnego wykonania danego zadania (Bandura, 1997). Zapewnienie satysfakcji z pracy oraz zwiększenie zaangażowania pracowników to ważne kwestie, z którymi borykają się organizacje. Wyniki badania pokazują, że poczucie własnej skuteczności jest istotnie i pozytywnie związane z satysfakcją z pracy i zaangażowaniem. Ustalenia przedstawione w analizie mają wpływ na uzyskanie przewagi konkurencyjnej. Współcześni uczeni argumentują, że uzyskanie przewagi konkurencyjnej za pomocą tradycyjnych środków nie jest zrównoważone jak zastrzeżone informacje, zasoby gospodarcze i dostępne technologie. Własna skuteczność będąc pozytywnym zasobem psychologicznym nie jest łatwa do powielenia przez konkurencję, a zatem może służyć jako źródło przewagi konkurencyjnej. Ponadto szkolenie własnej skuteczności może być opracowane w celu zwiększenia poczucia własnej skuteczności u pracowników. Poprawa wlasnej skuteczności może wspierać wzrost zachowań samoprzywództwa, zaangażowania, satysfakcji z pracy i wydajności.
Źródło:
Polish Journal of Management Studies; 2016, 13, 1; 134-144
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
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
Artykuł
Wyświetlanie 1-15 z 27

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