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-trimethoxy­phen­yl)spiro­[pyrrolidine-3,3′-indoline]-5-carboxyl­ate monohydrate

In the title compound, C31H32N2O6·H2O, the pyrrolidine ring adopts an envelope conformation. The ethyl C atoms of the ethoxy­cabonyl group are disordered over two positions with occupancies of ca 0.80 and 0.20. Intra­molecular N—H⋯O hydrogen bonds form S(5) and S(6) ring motifs. Mol­ecules 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 inter­actions