404 research outputs found
Parametric investigation of nonlinear fluctuations in a dc glow discharge plasma
Glow discharge plasmas exhibit various types of self excited oscillations for
different initial conditions like discharge voltages and filling pressures. The
behavior of such oscillations associated with the anode glow have been
investigated using nonlinear techniques like correlation dimension, largest
Lyapunov exponent etc. It is seen that these oscillations go to an ordered
state from a chaotic state with increase in input energy i.e. with discharge
voltages implying occurrence of inverse bifurcations. These results are
different from the other observations wherein the fluctuations have been
observed to go from ordered to chaotic state.Comment: Submitted to Chao
Continuous wavelet transform based time-scale and multi-fractal analysis of the nonlinear oscillations in a hollow cathode glow discharge plasma
Continuous wavelet transform (CWT) based time-scale and multi-fractal
analyses have been carried out on the anode glow related nonlinear floating
potential fluctuations in a hollow cathode glow discharge plasma. CWT has been
used to obtain the contour and ridge plots. Scale shift (or inversely frequency
shift) which is a typical nonlinear behaviour, has been detected from the
undulating contours. From the ridge plots, we have identified the presence of
nonlinearity and degree of chaoticity. Using the wavelet transform modulus
maxima technique we have obtained the multi-fractal spectrum for the
fluctuations at different discharge voltages and the spectrum was observed to
become a monofractal for periodic signals. These multi-fractal spectra were
also used to estimate different quantities like the correlation and fractal
dimension, degree of multi-fractality and complexity parameters. These
estimations have been found to be consistent with the nonlinear time series
analysis.Comment: 6 pages, 5 figures, glow discharge plasma; Multifractal spectrum;
contour plots, ridge plots, correlation dimension, complexity paramete
HOME REMEDIES FOR ORAL DISEASES
Self-help through self-treatment makes a countless contribution. Home remedy use is a component of health self-management, particularly among people who have experienced limited access to medical care or discrimination by the health care system. Self-care using home remedies survived for long time and it surely give effect in the easiest, safest, fastest and cheapest way. Oral diseases are a significant public health burden in India as well as across the globe. The consequence of poor oral health deteriorates the individual health and wellbeing, decrease economic productivity, and act as significant risk factors for other systemic health ailments. Developing countries have more diverse health systems than developed countries and expenditure in oral health care is low, access to Dental healthcare is limited and restricted to emergency Dental care or pain relief. Moreover, allopathic medicine is expensive and these chemicals can have adverse effects. Hence, there is a need for alternative products and natural extracts obtained from plants which are safe and biocompatible can be considered as good alternatives. In such circumstances use of home remedies would meet the need for treating minor ailments safely. Home remedies are good and comparable methods of equal value which have met the scientific and regulatory criteria for safety and effectiveness. The purpose of this review was to evaluate some of the commonly available foods being utilized in the treatment of oral diseases at home
Anti-filarial IgG antibodies in patients with Bancroftian filariasis and tropical pulmonary eosinophilia
Anti-filarial (anti- B. malayi adult as well as anti- B. malayi microfilarial) IgG antibody levels were measured by enzyme
linked immunosorbent assay (ELISA) in asymptomatic microfilaria carriers, acute, chronic and tropical pulmonary
eosinophilia (TPE) patients, endemic and non-endemic controls. Controls from endemic areas had higher antibody titres
compared with controls from non-endemic areas. The antibody response in different groups of filariasis patients was not stage
specific. There were no association between clinical disease and antibody levels except in TPE. Though TPE patients had very
high antibody levels, a proportion of them had low levels suggesting heterogeneity in TPE population
Metallurgical investigation of cracked Al–5.5Zn–2.5Mg–1.5Cu aluminium alloy valve
AbstractThe high strength aluminium alloy Al–5.5Zn–2.5Mg–1.5Cu (AA7075) is being widely used in realisation of aerospace components. A component ‘fill and vent valve’ used in liquid propulsion system was fabricated from AA 7075 forgings in T7352 temper condition, and subsequently undergone various functional tests, four years back. Recently, during dye penetrant test after proof pressure test at 525bar, a valve indicated presence of a crack. Detailed metallurgical investigation indicated that failure was caused by stress corrosion cracking
Ethyl 4′-ethenyl-2′-oxo-4-phenyl-2-(3,4,5-trimethoxyÂphenÂyl)spiroÂ[pyrrolidine-3,3′-indoline]-5-carboxylÂate monohydrate
In the title compound, C31H32N2O6·H2O, the pyrrolidine ring adopts an envelope conformation. The ethyl C atoms of the ethoxyÂcabonyl group are disordered over two positions with occupancies of ca 0.80 and 0.20. IntraÂmolecular N—H⋯O hydrogen bonds form S(5) and S(6) ring motifs. MolÂecules are linked into a three-dimensional framework by O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds, and by C—H⋯π interÂactions
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