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Patra A.,University of Burdwan | Sen B.,University of Burdwan | Sarkar S.,Durgapur Institute of Advanced Technology and Management | Pandey A.,Midnapore College | Chattopadhyay P.,University of Burdwan
Polyhedron | Year: 2013

A new series of hexacoordinated octahedral nickel(II) complexes of 2-(pyridin-3-ylmethylsulfanyl)phenylamine (L) formulated as [Ni(L) 4(X)2] (1-4) [where X = Cl- (1); NCO - (2); N3 - (3) and NCS- (4)] has been synthesised and characterised by physicochemical, spectroscopic tools. Details of structural study of complex 1 using single crystal X-ray crystallography showed that distorted tetragonal environment around nickel(II) ion has been satisfied by four pyridinic-N donors of four organic moieties (L) and two chloride ions. All the complexes are redox active and the electrochemical study of the complexes showed only cathodic Ni II/NiI redox couples in the range of -0.61 to -695 V versus Ag/AgCl. Interactions of 1 towards calf thymus-DNA by spectroscopic, viscosity-measurement and electrochemical study and towards bovine serum albumin (BSA) with the help of absorption and fluorescence spectroscopy were examined. Antibacterial activity of the complexes (1-4) studied by agar disc diffusion method showed the comparable inhibition activity of the nickel(II) complexes against some pathogenic bacteria namely Escherichia coli, Vibrio cholerae, Streptococcus pneumonia, Shigella sp. and Bacillus cereus. © 2013 Elsevier Ltd. All rights reserved.


Maity T.,Indian School of Mines | Das P.S.,Durgapur Institute of Advanced Technology and Management
ISCI 2011 - 2011 IEEE Symposium on Computers and Informatics | Year: 2011

Measurement of data electronically leads a combination of benefits that go well beyond the traditional rotor-plate energy meter design. In this paper with the help of an energy chip, an improved novel three phase energy metering solution is developed. Automating the progression of measurement through digital wireless communication technique is done to get high accuracy, smooth control and better reliability. The developed energy meter calculates the total average active power mainly for industrial and commercial applications. The hardware circuit accepts three phase voltages and currents as its inputs and provides the output in the form of serial interfaced data equivalent to the average real power. This serial data is fed to a remote personal computer through the wireless ZigBee network that represents the concept of distant wireless metering, practically involving no manpower. The paper also presents a software solution developed for total electrical energy billing and data management system. © 2011 IEEE.


Sarathi D.P.,Durgapur Institute of Advanced Technology and Management | Tanmoy M.,Indian School of Mines
Disaster Advances | Year: 2015

Working environment inside underground is hostile. Prior intimation about possible disaster is necessary to minimize losses of lives and property. Updated information regarding working sight is necessary to evaluate the actual working environment. After post disaster situation, evaluation of the present condition of the working place is necessary for the quick response team. Image of that particular site is necessary in this regard. This paper deals with the image processing inside mines.


Rahman M.,Durgapur Institute of Advanced Technology and Management | Lee W.,Chung Yuan Christian University
Key Engineering Materials | Year: 2010

Colloids composed of liquid-crystal hydrosols exhibit a rich set of interesting phenomena. The coupling between liquid-crystalline media and colloidal particles plays an essential role leading to an abundant source of new physics. In the last few years, peculiar behaviors of carbon-nanotube-doped calamitic liquid crystals have attracted considerable attention. This paper provides a brief introduction to this alluring subject for its on-going research development in this laboratory. First presented are our current understandings of the nematic colloidal system comprising carbon nanotubes and of their possible orientation and dynamics under the application of an external field. Various electro-optical and electrical properties of a liquid-crystal display rectified by the nanoscale carbonaceous guest are then addressed to a larger extent. Dielectric relaxation obtained from a nematic impregnated with carbon nanotubes is also discussed. With historical significance for the dawn of the liquid-crystal-carbon-nanotube research, several important findings of enhanced nonlinear optical properties in typical nematic mesomaterials consisting of suspended nanotubes are delineated. With the new colloidal systems of elongated nanoscale solids dispersed in anisotropic fluids in the mesophase, many new intriguing phenomena are awaiting theoretical and experimental explorations. Collaborations are called to draw attention of interested theoretical physicists, in particular. © (2010) Trans Tech Publications.


Sinha P.K.,Durgapur Institute of Advanced Technology and Management | Biswas A.K.,National Institute of Technology Durgapur | Majumdar B.,Jadavpur University
International Review of Mechanical Engineering | Year: 2013

In the present investigation the distribution of mean velocity, static pressure and total pressure are experimentally studied on a C-shape diffuser of 40° angle of turn with an area ratio of 1.284 and centerline length was chosen as three times of inlet diameter. The experimental results then were numerically validated with the help of Fluent and then a series of parametric investigations are conducted with same centre line length and inlet diameter but with different area ratios varying from 1.25 to 2.0 and angle of turn 30° to 75°. The measurements were taken at Reynolds number 2.25 × 105 based on inlet diameter and mass average inlet velocity. Predicted results of coefficient of mass averaged static pressure recovery (48%) and coefficient of mass averaged total pressure loss (12%) are in good agreement with the experimental results of coefficient of mass averaged static pressure recovery (45%) and coefficient of mass averaged total pressure loss (11%) respectively. Standard k-ε model in fluent solver was chosen for validation. From the parametric investigation it is observed that for the increase in area ratio from1.25 to 2.0, static pressure recovery increases sharply but with the increase of angle of turn pressure recovery decreases steadily. The coefficient of total pressure loss almost remains constant with the change in area ratio and angle of turn for similar inlet conditions. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.


Biswas A.K.,National Institute of Technology Durgapur | Sinha P.K.,Durgapur Institute of Advanced Technology and Management | Mullick A.N.,National Institute of Technology Durgapur | Majumdar B.,Jadavpur University
International Review of Mechanical Engineering | Year: 2012

In the present investigation the distribution of wall static pressure and mean velocity are experimentally studied on a C-shape constant area rectangular curved duct of 90° angle of turn. The experiment is carried out at mass averaged mean velocity of 40m/s. The velocity distribution shows the bulk flow shifting from outer wall to the inner wall along the flow passage of curved duct is very instinct. Due to the imbalance of centrifugal force and radial pressure gradient, secondary motions in the form of counter rotating vortices have been generated within the curved duct. The experimental results then were numerically validated with the help of Fluent, which shows a good agreement between the experimental and predicted results. © 2012 Praise Worthy Prize S.r.l. - All rights reserved.


Ghosh D.,Durgapur Institute of Advanced Technology and Management | Sinha M.K.,Indian Institute of Technology Guwahati | Purkait M.K.,Indian Institute of Technology Guwahati
Desalination | Year: 2013

Uniaxial and paste methods are widely used for the preparation of ceramic membranes. However, there is no specific guideline for considering a particular method to obtain the desired membrane properties. This paper elaborates a comparative performance analysis of ceramic membranes prepared by uniaxial and paste methods. Effects of sintering temperature on different membrane structural properties such as pore size distribution, average pore size, surface pore density and porosity were investigated in detail to characterize membranes prepared by both methods. It was seen that the mean pore size of the membranes prepared by paste method decreased from around 5.2μm to 1.6μm when sintering temperature was increased from 750°C to 950°C. The porosity and pore density were also decreased from 85 to 55 and 140 to 100, respectively for the said temperature change. Considering the raw material cost, the material cost of the membranes prepared by paste and uniaxial cold pressing methods were calculated at around 110US $m-2 and 135US$m-2, respectively. Prepared membranes were used in a hybrid technique (electrocoagulation followed by microfiltration) for the removal of fluoride from aqueous medium. © 2013 Elsevier B.V.


Koley S.,Durgapur Institute of Advanced Technology and Management | Sen B.K.,Indian National Science Academy
Annals of Library and Information Studies | Year: 2015

The paper presents the results of the analysis of 49 books of Prof. C N R Rao, published during 1960 to 2013. The analysis shows that 18 books were written by him singly or jointly with other scientists. The rest (N=31) are works produced under his solo or joint editorship. Thirty five books were published abroad and 14 in India (11 from Delhi) World Scientific published 8 books, Wiley VCH published 4 books, Academic Press and Indian National Science Academy published 3 each, and the rest were published by 22 other publishers. His first book was published at the age of 27. Most of the books were authored by him during his 50s (16 books) and 70s (12 books). All his books were published in English. However, a number of books have been translated into Russian, Chinese, Hindi and Kannada. The popularity of his books can be gauged from the fact that two of his books have run into fourth edition, one to third edition, and five books to second edition. The largest number of books belong to physical chemistry, particularly to solid state chemistry. © 2015, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.


Pal P.,National Institute of Technology Durgapur | Manna A.K.,Durgapur Institute of Advanced Technology and Management
Water Research | Year: 2010

Investigations on solar-driven membrane distillation (SDMD) were carried out for removal of arsenic from contaminated groundwater. Three different types of hydrophobic membranes made of polytetrafluoroethylene (PTFE) and polypropylene (PP) with surface area of 120×10-4m2 were used as flat sheet in a direct contact membrane distillation (DCMD) set up in a cross flow module. Effects of initial arsenic concentration in the feed, feed velocity, feed temperature and distillate inlet temperature on arsenic removal efficiency and flux were studied where temperatures of feed and distillate were found to have significant effect on the flux. Almost 100% arsenic separation was achieved without wetting membrane pore even after 120h of operation. The PTFE membrane with a flux of 49.80kg/m2h was found to the best one out of the tested membranes. The study shows that solar-driven DCMD can effectively separate arsenic from groundwater using a cross flow membrane module with PTFE hydrophobic membrane. © 2010 Elsevier Ltd.


Ghosh S.,Durgapur Institute of Advanced Technology and Management
IEEE Antennas and Wireless Propagation Letters | Year: 2010

This letter proposes a planar modified circular ring antenna for ultrawideband (UWB) applications with band notch performance. By suitably adjusting the antenna parameters, a return loss of 10 dB is achieved over the desired frequency range (3.1-10.6 GHz) except the notch frequency band. The band-notched characteristic is achieved by introducing a tuning stub inside the ring monopole. The results for return loss and radiation pattern are simulated using electromagnetic simulator WIPL-D. The time domain behavior of the antenna in terms of the fidelity factor is evaluated using Computer Simulation Software (CST) transient solver. A prototype antenna is fabricated, and the simulated result for return loss is compared to the measured result. © 2010 IEEE.

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