Archives- 

The double diffusive convection in a horizontal layer of a porous medium saturated with a Maxwell nanofluid is studied using linear and non-linear stability analyses. The modified Darcy-Maxwell model is used for the momentum equation. The model used for the Maxwell nanofluid incorporates the effects of Brownian motion and thermophoresis. The thermal energy equations include the diffusion and cross diffusion terms. The linear theory depends on normal mode technique and the onset criterion for stationary and oscillatory convection is derived analytically. The non-linear theory based on the representation of Fourier series method is used to find the transient behavior of heat and mass transports. We observe that the transient Nusselt numbers show oscillatory motion when time is small. However, when time becomes very large all the three transient Nusselt values approaches to their steady-state values.

Table of contents for the month of March 2018

Table of contents for the month of May 2018

Sixteenth century Europe is widely recognized by the word Renaissance which made an enormous evolution in cultural, economic, artistic and literary aspects of that age. British literature in particular went under the influence of masterpieces of great men like William Shakespeare and Christopher Marlowe who injected a generous motif to the literary canon of that time. By establishing a peculiar research on the side of the heroes of the two plays i.e. Shakespeare's Hamlet and Marlowe's Faustus, we come to face with the emergence of novel characters who are in need of more precision. In this direction, Friedrich Nietzsche's philosophical thoughts come in handy to researcher's attempt to apply a critical reading of the two plays in a comparative manner in order to shed light on the deep levels of the groundwork of these two plays. For doing so, six fundamental concepts taken out of Nietzsche's theories are being observed along the context of the works each of which though might meet in a number of overlaps, represent the complicated concept of Renaissance Man with a critical and metaphoric perspective. Finally, the outcome is captured as was the ultimate goal of the researcher: a moral implication perceived on the literary basis of the two plays. Without considering any biased tendency towards a specific author or critic, the extracted concepts of the works rely on Nietzsche's enlightenments by expressing life's various ups and downs and by manifesting the outcomes of such jeopardies happened to the heroes which directly target the literary reader on how to supply the eternal pace of life as the mere meaning of humanity.

This paper reviews the empirical study on Excluded people (Dalit Christians) in Indian Society. Dalit Christian is more painful and humiliating to compare than other communities because of the Caste of the society. Dalits who converted to Christianity did not escape the caste system which has a strongly fixed presence in Indian society. The problem of Dalit has elicited considerable interest in the minds of researchers in recent times. In this study main objectives is to identify the Justice, Social, Economical and Political status of Dalit Christians in Puthukottai District and to suggest a suitable action plan for their sustainable development. Tools for Data Collation In the present study data were both ‘primary’ as well as ‘secondary’ sources. The dates were collected primary sources constituted of the respondent of all age groups and the sample size was study has been drawn by using census method. Total sample selected for the study are 9310 respondents, in this study would used family census method. The researcher was selected four Taluks in Puthukottai District and each four Taluks, ten areas have selected based village, urban, semi – urban in this method were selected areas. Design of the Study here, descriptive design will be used to describe the data. The collected data were analysed with the help of descriptive and simple percentage. The collected data were analyzed to get a better understanding of the Justice, Social, and Economical and Political statues of Dalit Christains in Puthukottai district.

The extrinsic compression by the gravid uterus is the most common cause of hydronephrosis in pregnancy. This is often tolerated seen its regressive nature after childbirth. However, this physiological factor could unmask a preexisting urinary deasise.We report, the clinical case of a patient aged 35, pregnant at 9 weeks, who was admitted to the emergency of renal colic.She had medical treatment without improvement. The evolution was marked by the clinical and biological improvement. After delivery, she had a CT scan that showed no abnormality, we also report a literature review on problems of diagnosis and management of urolithiasis in pregnancy.

Semi-organic nonlinear optical crystal Pottasium hydrogen phthalate (KAP) crystals doped with mono, di, trivalent metal ion(Ag+,Ca2+,Cr3+) doped separately were grown by slow evaporation solution growth technique. The crystal system and lattice parameters were confirmed from the powder X-ray diffraction analysis. Fourier transform infrared (FTIR) studies confirm the various functional groups present in the grown crystal. The transmittance of electromagnetic radiation is studied through UV-Visible spectrum. The mechanical property of grown crystals has been analyzed by Vicker’s microhardness method. The thermal behaviour of the grown crystals has been investigated by DTA and TGA analysis. SHG efficiencies were measured using Kurtz powder technique. The NLO efficiency of these crystals was measured and Ca2+ doped KAP have the highest SHG value than all other crystals.

Bloom Filter (BF) is a simple but powerful data structure that can check membership to a static set. The trade-off to use Bloom filter is a certain configurable risk of false positives. The odds of a false positive can be made very low if the hash bitmap is sufficiently large. Spam is an irrelevant or inappropriate message sent on the internet to a large number of newsgroups or users. A spam word is a list of well-known words that often appear in spam mails. The proposed system of Bin Bloom Filter (BBF) groups the words into number of bins with different false positive rates based on the weights of the spam words for spam filtering. Simulated Annealing (SA) is stimulated by an analogy to annealing in solids. It is used to search for feasible solutions and converge to an optimal solution. In this paper SA is applied to minimize the total membership invalidation cost of BBF. The experimental results are analyzed for various sizes of bins. The results show that, the BBF using SA with different false positive rate has lower total membership invalidation cost than the standard BF.

This study presents a computational fluid dynamics (CFD) model for modelling gas evolution and current distribution in a direct methanol fuel cell (DMFC). The improved two-phase model includes a new sub-model for estimating the interface mass transfer without empirical correlations. Simulation results in a horizontal channel of the DMFC agree with typical trends reported in the literature for bubbly flows. The increase in inlet flow rate is found to lead to a decrease in the gas content in the outlet of the anode channels. A case study illustrates applications of the CFD model for modelling gas evolution and current distribution in a DMFC with a parallel flow-field design. Simulation results with a improved two-phase model provide an explanation of experimental observations of a transparent DMFC with parallel channels. An improved three-dimensional CFD model includes all relevant phenomena and is valuable for gas management in a DMFC design.

The absorber layer antimony tin sulfide thin film was deposited by physical vapor deposition (PVD) using two source simultaneous deposition techniques for solar cell applications. The photoconductivity was measured with a photoconductivity spectrometer which confirms the photo-activeness of antimony tin sulfide. Thickness, band gap, refractive index and transmittance were calculated by using ellipsometry techniques. The transmittance of the material was above the visible range which decreases with the increase of wavelength. The material has n-type conductivity measured with hot probe technique.