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Search Results: 1 - 10 of 2090 matches for " Bhattacharya Debasish "
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Nuclear management in manual small incision cataract surgery by snare technique
Bhattacharya Debasish
Indian Journal of Ophthalmology , 2009,
Abstract: Manual small incision cataract surgery has evolved into a popular method of cataract surgery in India. However, in supra hard cataract, bringing out the whole nucleus through the sclerocorneal flap valve incision becomes difficult. A bigger incision required in such cataracts loses its value action, as the internal incision and corneal valve slips beyond the limbus into sclera. Struggling with the supra hard cataracts through a regular small incision. Phacofracture in the anterior chamber becomes a useful option in these cases. In the snare technique, a stainless steel wire loop when lassoed around the nucleus in the anterior chamber constricts from the equator, easily dividing the hardest of the nuclei into two halves. The wire loop constricts in a controlled way when the second cannula of snare is pulled. The divided halves can easily be brought out by serrated crocodile forceps. This nuclear management can be safely performed through a smaller sclerocorneal flap valve incision where the corneal valve action is retained within the limbus without sutures, and the endothelium or the incision is not disturbed. However, the technique requires space in the anterior chamber to maneuver the wire loop and anterior chamber depth more than 2.5 mm is recommended. Much evidence to this wonderful technique is not available in literature, as its popularity grew through live surgical workshops and small interactive conferences.
Effect of Road Traffic Noise Pollution on Human Work Efficiency in Government Offices, Private Organizations, and Commercial Business Centres in Agartala City Using Fuzzy Expert System: A Case Study
Debasish Pal,Debasish Bhattacharya
Advances in Fuzzy Systems , 2012, DOI: 10.1155/2012/828593
Abstract:
Effect of Road Traffic Noise Pollution on Human Work Efficiency in Government Offices, Private Organizations, and Commercial Business Centres in Agartala City Using Fuzzy Expert System: A Case Study
Debasish Pal,Debasish Bhattacharya
Advances in Fuzzy Systems , 2012, DOI: 10.1155/2012/828593
Abstract: This study examines the problems of reduction of individual’s efficiency in his/her respective working places because of road traffic noise pollution in Agartala due to rapidly growing vehicular traffic. This paper deals with monitoring and modeling of the disturbances caused due to vehicular road traffic interrupted by traffic flow conditions on personal work performance. Total of two hundred seventy individuals from different road side Government Offices, Private Organizations and Commercial Business Centres on both sides of busy roads of the city were interviewed for attitudinal responses. Traffic volume count and noise indices data were collected simultaneously at six selected sites of the city. A relationship was developed between different traffic noise parameters and its harmful impact on work competency of individuals using MATLAB. Regression equations developed to predict the percentage of high annoyance among the individuals are fit based on noise parameters and parameters related to traffic movements. In addition, statistical analysis was also carried out between measured and predictive values of the percentage of highly annoyed group of individuals. The present model will draw the attention of the State Government and will help the policy maker to take the necessary steps to reduce this problem. 1. Introduction Noise pollution [1] is a significant environmental problem in rapidly developing built-up cities like Agartala. Traffic noise [2] is probably the most rigorous and pervasive type of noise pollution. Traffic noise has become a serious problem nowadays because of inadequate urban planning of the city in the past. Homes, schools, offices, hospitals, commercial business centers, and other community buildings were routinely built close to the main roads of the municipality without buffer zones or adequate sound proofing. The problem has been compounded by increases in traffic volumes (two wheelers, heavy motor vehicles, and other vehicles) far beyond the expectations of our early urban planners. This alarming increase in the volume of traffic is actually inversely related to the degradation of the environment [3]. Noise pollution is one of the major environmental pollutants that are encountered in daily life and has direct effects on human performance. Sound pressure is a basic measure of the vibrations of air that makes up sound, and because the range that the human listeners can detect is very wide, these levels are measured on the logarithmic scale with units of decibel (dB). Agartala, capital of Tripura, is a relatively medium-large
Persistent corneal edema secondary to presumed dead adult filarial worm in the anterior chamber
Basak Samar,Hazra Tushar,Bhattacharya Debasish
Indian Journal of Ophthalmology , 2007,
Abstract: We present three cases of persistent corneal edema secondary to presumed dead adult filarial worms lying in the anterior chamber with their attachment to the endothelium. Two of them were initially diagnosed as descemet′s fold with corneal edema. Two patients underwent penetrating keratoplasty and in one case, surgical removal was partly possible with clearing of cornea.
Millimeterwave Spectral Studies of Propynal (HCCCHO) Produced by DC Glow Discharge and Ab Initio DFT Calculation
A. I. Jaman,Rangana Bhattacharya,Debasish Mandal,Abhijit K. Das
Journal of Atomic, Molecular, and Optical Physics , 2011, DOI: 10.1155/2011/439019
Abstract: The ground-state (=0) millimeterwave rotational spectrum of propynal (HCCCHO) produced by a DC glow discharge through a low-pressure (~10–20 mTorr) flow of propargyl alcohol (HCCCH2OH) vapor has been observed in the frequency region: 36.0–94.0 GHz. Measured rotational transition frequencies along with the previously reported microwave and millimeterwave transitions were fitted to a standard asymmetric-top Hamiltonian to determine an improved set of rotational and centrifugal distortion constant. Detailed DFT calculations were also carried out with various functional and basis sets to evaluate the spectroscopic constants, dipole moment, and various structural parameters of propynal and compared with the corresponding experimental values.
Probing deviation of tribimaximal mixing and reach of $\theta_{13}$ using neutrino factory at CERN and ICAL detector at INO
Majumdar, Debasish;Ghosal, Ambar;Bhattacharya, Sudeb;Kar, Kamales
High Energy Physics - Phenomenology , 2007, DOI: 10.1063/1.2898926
Abstract: We investigate the deviation from tribimaximal mixing value and the reach of $\theta_{13}$ using neutrino factory at CERN and ICAL detector at INO.
Unilateral pellucid marginal degeneration
Basak Samar,Hazra Tushar,Bhattacharya Debasish,Sinha Tushar
Indian Journal of Ophthalmology , 2000,
Abstract:
Intravitreal live gnathostoma spinigerum
Basak Samar,Sinha Tushar,Bhattacharya Debasish,Hazra Tushar
Indian Journal of Ophthalmology , 2004,
Abstract: Intraocular infestation by live Gnathostoma spinigerum is a rare occurrence in humans. Most of the published reports are from South-East Asia. We report a case of intravitreal gnathostomiasis, where the worm was removed live and intact by pars plana vitrectomy.
Millimeterwave Spectral Studies of Propynal (HCCCHO) Produced by DC Glow Discharge and Ab Initio DFT Calculation
A. I. Jaman,Rangana Bhattacharya,Debasish Mandal,Abhijit K. Das
Journal of Atomic and Molecular Physics , 2011, DOI: 10.1155/2011/439019
Abstract: The ground-state ( ) millimeterwave rotational spectrum of propynal (HCCCHO) produced by a DC glow discharge through a low-pressure (~10–20?mTorr) flow of propargyl alcohol (HCCCH2OH) vapor has been observed in the frequency region: 36.0–94.0?GHz. Measured rotational transition frequencies along with the previously reported microwave and millimeterwave transitions were fitted to a standard asymmetric-top Hamiltonian to determine an improved set of rotational and centrifugal distortion constant. Detailed DFT calculations were also carried out with various functional and basis sets to evaluate the spectroscopic constants, dipole moment, and various structural parameters of propynal and compared with the corresponding experimental values. 1. Introduction Propynal (HCCCHO) also known as propiolic aldehyde has been found in interstellar molecular clouds TMC-1 and Sgr B2(N-LMH) [1–3]. In 1955 Howe and Goldstein [4] reported the and microwave transitions of the most abundant isotopic species of propynal. They have determined the dipole moment of the molecule to be D. Later on, Costain and Morton [5] determined the rotational constants , , and ( ) for the parent as well as various isotopic species and were able to determine an accurate substitution structure. Winnewisser [6] has extended the analysis of the ground state of propynal to the millimeterwave region (95.0–200.0?GHz) which has yielded a set of ground state rotational and centrifugal distortion constants. Reference [6] includes a set of predicted -type R-branch frequencies from 37.0 to 94.0?GHz covering to transitions which are of prime importance to radio astronomers for conducting search for this molecule in the interstellar space. Infrared-microwave double-resonance spectroscopic study of propynal using a Zeeman tuned He-Xe laser as the infrared source was conducted by Takami and Shimoda [7] to determine the rotational constants of the excited vibrational state. Later on, Jones [8] has reported the rotational constants of propynal in the ground as well as several excited state combination and hot bands using a CO2 laser as the infrared source. In all the previous works propynal was either procured commercially or prepared chemically. Production of new molecules, molecular ions, and radicals by applying a DC glow discharge through a low-pressure flow of gas or a mixture of gases inside an absorption cell has proved to be an efficient and useful technique [9]. Recently, Jaman [10] has reported an analysis of the millimeterwave rotational spectra of propyne (CH3CCH) produced by a DC glow discharge
Astrophysical Constraints on the Scale of Left-Right Symmetry in Inverse Seesaw Models  [PDF]
Debasish Borah
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.329144
Abstract: We revisit the recently studied supersymmetric gauged inverse seesaw model [1] to incorporate astrophysical constraints on lightest supersymmetric particle (LSP) lifetime such that LSP constitutes the dark matter of the Universe. The authors in [1] considered light sneutrino LSP that can play the role of inelastic dark matter (iDM) such that desired iDM mass splitting and tiny Majorana masses of neutrinos can have a common origin. Here we consider a generalized version of this model without any additional discrete symmetry. We point out that due to spontaneous R-parity(Rp=(-1)3(B-L)+2s) breaking in such generic supersymmetric gauged inverse seesaw models, LSP can not be perfectly stable but decays to standard model particles after non-renormalizable operators allowed by the gauge symmetry are introduced. We show that strong astrophysical constraints on LSP lifetime makes sneutrino dark matter more natural than standard neutralino dark matter. We also show that long-livedness of sneutrino dark matter constrains the left right symmetry breaking scale MR<104 GeV.
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