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Atul Kumar

CHAUDHARY CHARAN SINGH UNIVERSITY MEERUT, Geography, Faculty Member

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Phone: 9675566994
Address: Department of Geography
N.R.E.C. College Khurja, Bulandshahr Uttar Pradesh

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Papers by Atul Kumar

Investigation of Hydro-Geomorphological Characteristics of Laster Gad Catchment, Garhwal Himalaya Using Geospatial Techniques

by Atul Kumar and Shairy chaudhary

ABSTRACT For hydro-geomorphological investigation, Laster Gad catchment, the tributary of Manda... more ABSTRACT
For hydro-geomorphological investigation, Laster Gad catchment, the tributary of Mandakini River (Rudraprayag district) in Garhwal Himalaya has been selected. The basic aim of present study is to elucidate the hydro-geomorphic characteristics of terrain through landforms mapping, geological mapping and LULC of the catchment. Beside this, the corresponding terrain attributes has been analyzed following recent geospatial techniques. It revealed that catchment has seventh order stream network with elongated shape from north to south and different homogeneous geological attributes, moderate to very steep slope and strong structural control. Bifurcation ratio between different successive orders varies very few but mean ratio (4.56) indicates that the strong structural control and less permeability of rocks. Moderate to moderate course drainage density, moderate to moderately high drainage frequency and very high texture ratio suggests that terrain has steep slopes, complex deformed lithology. Local relief of the catchment ranges from 219 m. to737 m. whereas absolute relief extent from 698 m. is in the southern part to the maximum 3770 m, in the northern part of catchment represents moderate to very high relief, less infiltration capacity and longer duration of water flow in the catchment. The morphometric indicators, existing landforms and geological formations indicate youth stage development of topography in the catchment area. Geospatial techniques and remote sensing data provide a significant help in assessing geo-hydrological studies in such terrains.
Keywords: Morphometric Analysis, Landforms, Geology and RS & GIS techniques.

Physiographic Study of Mandakini valley (Rudraprayag District) Garhwal Himalaya by Morphometric Analysis and Geospatial Techniques

Physiographic unit Mandakini basin with Rudraprayag district administrative are is covering area ... more Physiographic unit Mandakini basin with Rudraprayag district administrative are is covering area about 1982.93sq. Km (Latitude 30 0 19'00'' and 30 0 49' North and longitude 78049' and 79 0 21' 13'' East) lies in Garhwal Himalayan Range, India has been selected for physiographic study through morphometric analysis. The basic aim of present study is to elucidate the characteristics of the areal, linear and relief features of the area using SOI toposheets and ASTR DEM which contribute as dominant factor to assess the landscape features of basin. It revealed that the Mandakini basin has seventh order river network with dendritic pattern suggests the different homogeneous geological attributes, moderate to steep slope and strong structural control. Bifurcation ratio between different successive orders varies very few but mean ratio indicates that the strong structural control and less permeability of rocks. Moderate to moderate course drainage density, moderate to moderate high drainage frequency and very high texture ratio suggests that terrain has steep slopes, complex deformed lithology. Geometric parameters indicates that the basin is less elongated in shape with moderate to very high relief, less infiltration capacity and longer duration of water flow in the basin. The minimum absolute relief 794.94 m. is in the southern part and the maximum 6993.71 m. in the northern upper part and moderate to very high sloping of the basin. The all morphometric indicators and existing landforms indicate youth stage of topography of the basin.

ASSESSMENT OF INCREASING THREAT OF FOREST FIRES IN UTTARAKHAND, USING REMOTE SENSING AND GIS TECHNIQUES Atul kumar

by Atul Kumar, Mahabir Negi, and Global Journal Of Advanced Research

Forest fires in Uttrakhand have been regular and historic feature. Every year forest fires in Utt... more Forest fires in Uttrakhand have been regular and historic feature. Every year forest fires in Uttrakhand causes great loss to the forest ecosystem, diversity of flora and fauna and economic wealth. Forest fire is one of the major disasters in the forests of Uttarakhand. High temperatures with no atmospheric moisture were one of the important reason for forest fires in Uttrakhand. Remote sensing and GIS technology that has been used to detect forest fires and recent technology can send an early warning to prevent forest fires. Remote sensing has also been effectively used in the study monitoring, detection of forest fire and future planning. Thus the main aim of this study is the causes and where the forest fire takes place by preparing fire events density map on the bases of using Remote Sensing real time forest fire data from EOSDIS NASA and GIS techniques. The various parameters are taken in to account land use from BHUVN, forest type map, relief and slope. Later on to analyze the causes these aspects were compared with fire density map. Topography, slope and types of vegetation play important role in the spread of forest fire. Outcome of the study demonstrate that the proximity to inhabited places, dry climatic conditions and dry Chir pine forest cover are mainly responsible forest fire in the state. These types of studies are helpful to suggest preventive measures in different risk areas of Uttrakhand. Forest is one of the most important precious natural resource and play significant role in the human life and environment. Forests are socially and environmentally inter-linked with the people in the hilly areas and play important role in the economic welfare and development of the region. Forest fire is one of the major disasters in the forests of Uttarakhand. These are many indigenous and endangered species which are adversely affected due to forest fires. Basically forest fires have been categorized into three types, ground fires, surface fire and crown fires. Ground fires are not easily predictable as it spread within rather than top of organic matter. It consumes organic matter like duff, musk or peat present beneath the surface litter of the forest floor. Second is surface fire characterized by the fast moving fire which consumes small vegetation and surface litter along with loss debris and third one is crown fire that burnt top trees or shrubs without any close link with surface fire. Current trend of increasing day by day rate of forest fire events in state, there is an urgent need to generate a geo-spatial fire events data base that help in planning, decision making measures. Remote sensing techniques and GIS techniques with satellite can contribute to a variety of natural resources applications. Technological development of satellite

Stereoscopic laparoscopy using depth information from 3D model

2014 IEEE International Symposium on Bioelectronics and Bioinformatics (IEEE ISBB 2014), 2014

Structural and functional characterization of the porcine proline-rich antifungal peptide SP-B isolated from salivary gland granules

Journal of peptide science : an official publication of the European Peptide Society, 2008

A 1905-Da cationic proline-rich peptide, named SP-B, was recently isolated by our group as the ma... more A 1905-Da cationic proline-rich peptide, named SP-B, was recently isolated by our group as the main component of salivary gland granules, and its primary sequence fully characterized by means of automated Edman sequencing and LC-MS/MS tools. In the present study SP-B is shown to possess antifungal activity when challenged with strains of Cryptococcus neoformans, Candida albicans and Aspergillus fumigatus, while only negligible antibacterial activity was detected. Furthermore, SP-B was found to be non-cytotoxic when tested on fibroblast cell lines. To obtain information regarding its structure affinity, capillary electrophoresis (CE), circular dichroism (CD) and attenuated total reflection (ATR)-FT/IR experiments were performed. CE revealed a pH dependence of the hydrodynamic radial dimensions both in aqueous and 2,2,2-trifluoroethanol solutions. CD and ATR-FT/IR measurements confirmed the structure-pH relationship, revealing a secondary structure composed of mixed proportions of pol...

Preretinal haemorrhages: an unusual manifestation of intravitreal amikacin toxicity

Australian and New Zealand journal of ophthalmology, 1999

To report a case with multiple preretinal haemorrhages after intravitreal amikacin. A 58-year-old... more To report a case with multiple preretinal haemorrhages after intravitreal amikacin. A 58-year-old patient developed postoperative endophthalmitis following a routine extracapsular cataract extraction in his left eye. He received two intravitreal injections of cephazoline (2.25 mg) and amikacin (0.4 mg), given 48 h apart. The patient presented to us with large preretinal haemorrhages at the posterior pole. Multiple large areas of blocked fluorescence were seen on fundus fluorescein angiography. Widespread posterior pole preretinal haemorrhages may be an unusual manifestation of intravitreal amikacin toxicity.

Diode laser transscleral cyclophotocoagulation in the treatment of chronic angle-closure glaucoma: a preliminary study

Journal of glaucoma, 2003

To evaluate the efficacy and safety of diode laser transscleral cyclophotocoagulation in the trea... more To evaluate the efficacy and safety of diode laser transscleral cyclophotocoagulation in the treatment of chronic angle-closure glaucoma. A prospective, non-comparative interventional pilot study was conducted. Fourteen eyes of 14 Chinese patients with chronic angle-closure glaucoma whose intraocular pressures were greater than 21 mm Hg on medications were treated with diode laser transscleral cyclophotocoagulation using the G-probe at the United Christian Hospital between February 2000 and May 2001. The inferior 270 degrees quadrant (from 2 to 11 o'clock for right eye and from 1 to 10 o'clock for left eye) was treated and the patients were followed up regularly. The initial laser energy was set at 2,000 mWatt with a duration of 2 seconds. The post-treatment anti-glaucoma medications were adjusted according to the intraocular pressure. If medications failed to lower the intraocular pressure to below 21 mm Hg, cyclophotocoagulation to the same inferior 270 degrees quadrant wa...

$Research paper thumbnail of Upper bound on singlet fraction of two qubit mixed entangled states$

Upper bound on singlet fraction of two qubit mixed entangled states

We demonstrate the possibility of achieving the maximum possible singlet fraction using a entangl... more We demonstrate the possibility of achieving the maximum possible singlet fraction using a entangled mixed two-qubit state as a resource. For this, we establish a tight upper bound on singlet fraction and show that the maximal singlet fraction obtained in does not attain the obtained upper bound on the singlet fraction. Interestingly, we found that the required upper bound can in fact be achieved using local filtering operations.

Temporal evolution of plasma discharge by an electron beam

Impact of Soil Solarization on Some Solanaceous Vegetables Nursery in Plateau Region of Jharkhand, India

Study revealed that soil solarization in integration with FYM amendment @ 0.2kg/m 2 and seed trea... more Study revealed that soil solarization in integration with FYM amendment @ 0.2kg/m 2 and seed treatment with Trichoderma harzianum @ 5.0 g/kg seed potentially reduced damping-off of tomato, chillies and brinjal seedlings. It is clear from the experiment that solarization for 6-8 weeks could effectively reduce the population of deleterious microflora inhabiting soil. The population of Fusarium, Pythium, Aspergillus sp. alongwith actinomycetes and bacteria increased progressively with decrease in duration of solarization period. Whereas, the population of Trichoderma spp. showed a slight reduction after 2 weeks of solarization but after 4 weeks of solarization their population increased with the increase in duration of solarization period. After 8 weeks of solarization, the population of Trichoderma spp. was maximum at 5 cm depth (4.33 x 10 4 /g soil) whereas in non solarised soil it was only 2.33 x 10 4 /g soil. And, the efficacy of solarization enhanced when it was employed in integration with farmyard manure as soil amendment and T. harzianum as seed treatment. Soil solarization in integration with FYM amendment and seed treatment with T. harzianum potentially reduced the pre-and post-emergence damping-off incidence to 15.67 and 2.00 per cent, respectively in tomato. In chilli, 11.00 and 2.33 per cent incidence of pre-and post-emergence damping-off was recorded. Similarly, in brinjal, 17.33 and 3.33 per cent incidence of pre-and post-emergence damping-off was recorded, respectively.

An automated hybrid technique for detecting the stage of non-proliferative diabetic retinopathy

Proceedings of the First International Conference on Intelligent Interactive Technologies and Multimedia - IITM '10, 2010

Diabetes is fast becoming a scourge in the modern day society both in the developing and the deve... more Diabetes is fast becoming a scourge in the modern day society both in the developing and the developed societies. Diabetes related complications lead to a lot of morbidity and Diabetic Retinopathy is fast becoming the cause of preventable blindness. Early detection and treatment with Laser will go a long way in checking this disease. Non-proliferative Diabetic Retinopathy (NPDR) is the set of early changes that take place in the Retina. It is divided into 3 categories into mild, moderate and severe. Initial changes when the microaneurysms (MA) start appearing. Then it is followed by hemorrhages. Finally appearance of cotton wool spots and hard exudates categorize it into severe NPDR. The stage of neo vascularization (NV) when new blood vessels begin to appear (to compensate for the reduced blood supply and nutrition to the retina) finally qualifies for proliferative Diabetic Retinopathy. The idea is to extract the features of NPDR and depending on their intensity and frequency they can be graded into mild, moderate and severe. This automated grading can be matched with the specialist&#x27;s perception and its accuracy can be tested. In this work, we have proposed a computer based automated hybrid technique for the detection of stages of Non-Proliferative Diabetic Retinopathy (NPDR) retinopathy stage using the color fundus images. The features are extracted from the Sample images using the image processing techniques and fed to the support vector machine (SVM). After color normalization preprocessing stage, an evidence value for every pixel is calculated by SVM. Then a mathematical morphological technique, a fuzzy c-means clustering technique, PCA, a support vector machine and a nearest neighbor classifier for further processing. The SVM classifier uses features extracted by combined 2DPCA instead of explicit image features as the input vector Combined 2DPCA is proposed and virtual SVM is applied to achieve the higher accuracy of classification. We demonstrate a Sensitivity of 97.1% for the classifier with the Specificity of 98.3%. Thus, an automated system for diagnosis of NPDR can be a useful tool for the Specialist to support in screening an detection of early Diabetic Retinopathy changes and hence timely intervention leading to reduced DR(Diabetic retinopathy) related blindness.

Tetrabutylammonium Hydroxide/p-Toluenesulfonyl Chloride, a Novel Peptide Coupling Agent

Cheminform, 1992

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

FASA: A Software Architecture and Runtime Framework for Flexible Distributed Automation Systems

Journal of Systems Architecture, 2015

ABSTRACT Modern automation systems have to cope with large amounts of sensor data to be processed... more ABSTRACT Modern automation systems have to cope with large amounts of sensor data to be processed, stricter security requirements, heterogeneous hardware, and an increasing need for flexibility. The challenges for tomorrow&#39;s automation systems need software architectures of today&#39;s real-time controllers to evolve. This article presents FASA, a modern software architecture for next-generation automation systems. FASA provides concepts for scalable, flexible, and platform-independent real-time execution frameworks, which also provide advanced features such as software-based fault tolerance and high degrees of isolation and security. We show that FASA caters for robust execution of time-critical applications even in parallel execution environments such as multi-core processors. We present a reference implementation of FASA that controls a magnetic levitation device. This device is sensitive to any disturbance in its real-time control and thus, provides a suitable validation scenario. Our results show that FASA can sustain its advanced features even in high-speed control scenarios at 1 kHz.

The Use of Basic Resin in the Preparation of Tetrahydropyranyl Derivatives of Alcohols and Phenols

ChemInform, 2004

Multicomponent, solvent-free synthesis of β-aryl-β-mercapto ketones using zirconium chloride as a catalyst

Tetrahedron Letters, 2007

Zirconium chloride efficiently catalyzes the one-pot, three-component reaction of an aryl aldehyd... more Zirconium chloride efficiently catalyzes the one-pot, three-component reaction of an aryl aldehyde, cyclic or acyclic enolizable ketones, and thiols under solvent-free conditions at room temperature to afford the corresponding β-aryl-β-mercaptoketones via aldol-Michael addition reactions. This methodology affords a large number of β-aryl-β-mercapto ketone derivatives in high yields and in short reaction times.

Management of Posterior Capsule Tears

Survey of Ophthalmology, 2001

Any breach in the continuity of the posterior capsule is defined as a posterior capsule tear. Pos... more Any breach in the continuity of the posterior capsule is defined as a posterior capsule tear. Posterior capsule tears can be preexisting (congenital or traumatic), spontaneous, or intrasurgical. Preexisting/congenital posterior capsule tears have been related to an intrauterine insult. Posterior capsule tears due to trauma may occur as a consequence of direct mechanical impact due to perforation or blunt injury. Depending on the duration of time between the posterior capsular trauma and the cataract surgery, these posterior capsule tears can have different features. Intrasurgical posterior capsule tears are the most common and can occur during any stage of cataract surgery. Also, they may be planned in the form of primary posterior capsulorhexis. The conventional management consists of prevention of mixture of cortical matter with vitreous, dry aspiration, and anterior vitrectomy, if required. In addition, during phacoemulsification low flow rate, high vacuum, and low ultrasound are advocated if a posterior capsule tear occurs. Dislocated nucleus or nuclear fragments require vitrectomy and the use of perfluorocarbon liquids. In the presence of a posterior capsule tear, the IOL can be placed in the sulcus, if the capsular rim is available, or in the bag, if the tear is small. Scleral fixated posterior chamber lenses and anterior chamber IOLs can be implanted when the posterior capsule tear is large. ( Surv Ophthalmol 45 :473-488, 2001. © 2001 by Elsevier Science Inc. All rights reserved.) Key words. cataract surgery • complications of phacoemulsification • posterior capsule defect • posterior capsule rent • posterior capsule tear • posterior polar cataract • primary posterior capsulorhexis • trauma Surv Ophthalmol 45

Fuzzy Model: Time Dependent Dispersion in Rivers

Indian International Conference on Artificial Intelligence, 2009

A landmark based registration technique for minimally invasive spinal surgery

2013 IEEE International Symposium on Consumer Electronics (ISCE), 2013

ABSTRACT This paper proposed a technique for skin curve registration based on landmark detection ... more ABSTRACT This paper proposed a technique for skin curve registration based on landmark detection and calibrated camera-projector system for medical purpose. The technique applies the algorithm which registers a precalculated 3D model for the 2D images of the video frames. The algorithm first calculates the 3D locations of landmarks based upon the calibrated camera projector system and the matching the landmarks in the 3D model using CT-scan. We then generate the image to be projected on the skin curve of a patient from the registered 3D spinal model, and it is created for projecting on the pork or real patient for surgeons to process surgical procedure by utilizing their natural eyes system. The experiments demonstrate the proposed registration method on both animal and real patient and evaluated by several surgeons for spinal surgery.

Distinguishing normal and pulmonary edema chest x-ray using Gabor filter and SVM

2014 IEEE International Symposium on Bioelectronics and Bioinformatics (IEEE ISBB 2014), 2014

ABSTRACT

Controlled secret sharing protocol using a quantum cloning circuit

Quantum Information Processing, 2014

We demonstrate the possibility of controlling the success probability of a secret sharing protoco... more We demonstrate the possibility of controlling the success probability of a secret sharing protocol using a quantum cloning circuit. The cloning circuit is used to clone the qubits containing the encoded information and en route to the intended receipients. The success probability of the protocol depends on the cloning parameters used to clone the qubits. We also establish a relation between the concurrence of initially prepared state, entanglement of the mixed state received by the receivers after cloning scheme and the cloning parameters of cloning machine. * [email protected]

Investigation of Hydro-Geomorphological Characteristics of Laster Gad Catchment, Garhwal Himalaya Using Geospatial Techniques

by Atul Kumar and Shairy chaudhary

ABSTRACT For hydro-geomorphological investigation, Laster Gad catchment, the tributary of Manda... more ABSTRACT
For hydro-geomorphological investigation, Laster Gad catchment, the tributary of Mandakini River (Rudraprayag district) in Garhwal Himalaya has been selected. The basic aim of present study is to elucidate the hydro-geomorphic characteristics of terrain through landforms mapping, geological mapping and LULC of the catchment. Beside this, the corresponding terrain attributes has been analyzed following recent geospatial techniques. It revealed that catchment has seventh order stream network with elongated shape from north to south and different homogeneous geological attributes, moderate to very steep slope and strong structural control. Bifurcation ratio between different successive orders varies very few but mean ratio (4.56) indicates that the strong structural control and less permeability of rocks. Moderate to moderate course drainage density, moderate to moderately high drainage frequency and very high texture ratio suggests that terrain has steep slopes, complex deformed lithology. Local relief of the catchment ranges from 219 m. to737 m. whereas absolute relief extent from 698 m. is in the southern part to the maximum 3770 m, in the northern part of catchment represents moderate to very high relief, less infiltration capacity and longer duration of water flow in the catchment. The morphometric indicators, existing landforms and geological formations indicate youth stage development of topography in the catchment area. Geospatial techniques and remote sensing data provide a significant help in assessing geo-hydrological studies in such terrains.
Keywords: Morphometric Analysis, Landforms, Geology and RS & GIS techniques.

Physiographic Study of Mandakini valley (Rudraprayag District) Garhwal Himalaya by Morphometric Analysis and Geospatial Techniques

Physiographic unit Mandakini basin with Rudraprayag district administrative are is covering area ... more Physiographic unit Mandakini basin with Rudraprayag district administrative are is covering area about 1982.93sq. Km (Latitude 30 0 19'00'' and 30 0 49' North and longitude 78049' and 79 0 21' 13'' East) lies in Garhwal Himalayan Range, India has been selected for physiographic study through morphometric analysis. The basic aim of present study is to elucidate the characteristics of the areal, linear and relief features of the area using SOI toposheets and ASTR DEM which contribute as dominant factor to assess the landscape features of basin. It revealed that the Mandakini basin has seventh order river network with dendritic pattern suggests the different homogeneous geological attributes, moderate to steep slope and strong structural control. Bifurcation ratio between different successive orders varies very few but mean ratio indicates that the strong structural control and less permeability of rocks. Moderate to moderate course drainage density, moderate to moderate high drainage frequency and very high texture ratio suggests that terrain has steep slopes, complex deformed lithology. Geometric parameters indicates that the basin is less elongated in shape with moderate to very high relief, less infiltration capacity and longer duration of water flow in the basin. The minimum absolute relief 794.94 m. is in the southern part and the maximum 6993.71 m. in the northern upper part and moderate to very high sloping of the basin. The all morphometric indicators and existing landforms indicate youth stage of topography of the basin.

ASSESSMENT OF INCREASING THREAT OF FOREST FIRES IN UTTARAKHAND, USING REMOTE SENSING AND GIS TECHNIQUES Atul kumar

by Atul Kumar, Mahabir Negi, and Global Journal Of Advanced Research

Forest fires in Uttrakhand have been regular and historic feature. Every year forest fires in Utt... more Forest fires in Uttrakhand have been regular and historic feature. Every year forest fires in Uttrakhand causes great loss to the forest ecosystem, diversity of flora and fauna and economic wealth. Forest fire is one of the major disasters in the forests of Uttarakhand. High temperatures with no atmospheric moisture were one of the important reason for forest fires in Uttrakhand. Remote sensing and GIS technology that has been used to detect forest fires and recent technology can send an early warning to prevent forest fires. Remote sensing has also been effectively used in the study monitoring, detection of forest fire and future planning. Thus the main aim of this study is the causes and where the forest fire takes place by preparing fire events density map on the bases of using Remote Sensing real time forest fire data from EOSDIS NASA and GIS techniques. The various parameters are taken in to account land use from BHUVN, forest type map, relief and slope. Later on to analyze the causes these aspects were compared with fire density map. Topography, slope and types of vegetation play important role in the spread of forest fire. Outcome of the study demonstrate that the proximity to inhabited places, dry climatic conditions and dry Chir pine forest cover are mainly responsible forest fire in the state. These types of studies are helpful to suggest preventive measures in different risk areas of Uttrakhand. Forest is one of the most important precious natural resource and play significant role in the human life and environment. Forests are socially and environmentally inter-linked with the people in the hilly areas and play important role in the economic welfare and development of the region. Forest fire is one of the major disasters in the forests of Uttarakhand. These are many indigenous and endangered species which are adversely affected due to forest fires. Basically forest fires have been categorized into three types, ground fires, surface fire and crown fires. Ground fires are not easily predictable as it spread within rather than top of organic matter. It consumes organic matter like duff, musk or peat present beneath the surface litter of the forest floor. Second is surface fire characterized by the fast moving fire which consumes small vegetation and surface litter along with loss debris and third one is crown fire that burnt top trees or shrubs without any close link with surface fire. Current trend of increasing day by day rate of forest fire events in state, there is an urgent need to generate a geo-spatial fire events data base that help in planning, decision making measures. Remote sensing techniques and GIS techniques with satellite can contribute to a variety of natural resources applications. Technological development of satellite

Stereoscopic laparoscopy using depth information from 3D model

2014 IEEE International Symposium on Bioelectronics and Bioinformatics (IEEE ISBB 2014), 2014

Structural and functional characterization of the porcine proline-rich antifungal peptide SP-B isolated from salivary gland granules

Journal of peptide science : an official publication of the European Peptide Society, 2008

A 1905-Da cationic proline-rich peptide, named SP-B, was recently isolated by our group as the ma... more A 1905-Da cationic proline-rich peptide, named SP-B, was recently isolated by our group as the main component of salivary gland granules, and its primary sequence fully characterized by means of automated Edman sequencing and LC-MS/MS tools. In the present study SP-B is shown to possess antifungal activity when challenged with strains of Cryptococcus neoformans, Candida albicans and Aspergillus fumigatus, while only negligible antibacterial activity was detected. Furthermore, SP-B was found to be non-cytotoxic when tested on fibroblast cell lines. To obtain information regarding its structure affinity, capillary electrophoresis (CE), circular dichroism (CD) and attenuated total reflection (ATR)-FT/IR experiments were performed. CE revealed a pH dependence of the hydrodynamic radial dimensions both in aqueous and 2,2,2-trifluoroethanol solutions. CD and ATR-FT/IR measurements confirmed the structure-pH relationship, revealing a secondary structure composed of mixed proportions of pol...

Preretinal haemorrhages: an unusual manifestation of intravitreal amikacin toxicity

Australian and New Zealand journal of ophthalmology, 1999

To report a case with multiple preretinal haemorrhages after intravitreal amikacin. A 58-year-old... more To report a case with multiple preretinal haemorrhages after intravitreal amikacin. A 58-year-old patient developed postoperative endophthalmitis following a routine extracapsular cataract extraction in his left eye. He received two intravitreal injections of cephazoline (2.25 mg) and amikacin (0.4 mg), given 48 h apart. The patient presented to us with large preretinal haemorrhages at the posterior pole. Multiple large areas of blocked fluorescence were seen on fundus fluorescein angiography. Widespread posterior pole preretinal haemorrhages may be an unusual manifestation of intravitreal amikacin toxicity.

Diode laser transscleral cyclophotocoagulation in the treatment of chronic angle-closure glaucoma: a preliminary study

Journal of glaucoma, 2003

To evaluate the efficacy and safety of diode laser transscleral cyclophotocoagulation in the trea... more To evaluate the efficacy and safety of diode laser transscleral cyclophotocoagulation in the treatment of chronic angle-closure glaucoma. A prospective, non-comparative interventional pilot study was conducted. Fourteen eyes of 14 Chinese patients with chronic angle-closure glaucoma whose intraocular pressures were greater than 21 mm Hg on medications were treated with diode laser transscleral cyclophotocoagulation using the G-probe at the United Christian Hospital between February 2000 and May 2001. The inferior 270 degrees quadrant (from 2 to 11 o'clock for right eye and from 1 to 10 o'clock for left eye) was treated and the patients were followed up regularly. The initial laser energy was set at 2,000 mWatt with a duration of 2 seconds. The post-treatment anti-glaucoma medications were adjusted according to the intraocular pressure. If medications failed to lower the intraocular pressure to below 21 mm Hg, cyclophotocoagulation to the same inferior 270 degrees quadrant wa...

$Research paper thumbnail of Upper bound on singlet fraction of two qubit mixed entangled states$

Upper bound on singlet fraction of two qubit mixed entangled states

We demonstrate the possibility of achieving the maximum possible singlet fraction using a entangl... more We demonstrate the possibility of achieving the maximum possible singlet fraction using a entangled mixed two-qubit state as a resource. For this, we establish a tight upper bound on singlet fraction and show that the maximal singlet fraction obtained in does not attain the obtained upper bound on the singlet fraction. Interestingly, we found that the required upper bound can in fact be achieved using local filtering operations.

Temporal evolution of plasma discharge by an electron beam

Impact of Soil Solarization on Some Solanaceous Vegetables Nursery in Plateau Region of Jharkhand, India

Study revealed that soil solarization in integration with FYM amendment @ 0.2kg/m 2 and seed trea... more Study revealed that soil solarization in integration with FYM amendment @ 0.2kg/m 2 and seed treatment with Trichoderma harzianum @ 5.0 g/kg seed potentially reduced damping-off of tomato, chillies and brinjal seedlings. It is clear from the experiment that solarization for 6-8 weeks could effectively reduce the population of deleterious microflora inhabiting soil. The population of Fusarium, Pythium, Aspergillus sp. alongwith actinomycetes and bacteria increased progressively with decrease in duration of solarization period. Whereas, the population of Trichoderma spp. showed a slight reduction after 2 weeks of solarization but after 4 weeks of solarization their population increased with the increase in duration of solarization period. After 8 weeks of solarization, the population of Trichoderma spp. was maximum at 5 cm depth (4.33 x 10 4 /g soil) whereas in non solarised soil it was only 2.33 x 10 4 /g soil. And, the efficacy of solarization enhanced when it was employed in integration with farmyard manure as soil amendment and T. harzianum as seed treatment. Soil solarization in integration with FYM amendment and seed treatment with T. harzianum potentially reduced the pre-and post-emergence damping-off incidence to 15.67 and 2.00 per cent, respectively in tomato. In chilli, 11.00 and 2.33 per cent incidence of pre-and post-emergence damping-off was recorded. Similarly, in brinjal, 17.33 and 3.33 per cent incidence of pre-and post-emergence damping-off was recorded, respectively.

An automated hybrid technique for detecting the stage of non-proliferative diabetic retinopathy

Proceedings of the First International Conference on Intelligent Interactive Technologies and Multimedia - IITM '10, 2010

Diabetes is fast becoming a scourge in the modern day society both in the developing and the deve... more Diabetes is fast becoming a scourge in the modern day society both in the developing and the developed societies. Diabetes related complications lead to a lot of morbidity and Diabetic Retinopathy is fast becoming the cause of preventable blindness. Early detection and treatment with Laser will go a long way in checking this disease. Non-proliferative Diabetic Retinopathy (NPDR) is the set of early changes that take place in the Retina. It is divided into 3 categories into mild, moderate and severe. Initial changes when the microaneurysms (MA) start appearing. Then it is followed by hemorrhages. Finally appearance of cotton wool spots and hard exudates categorize it into severe NPDR. The stage of neo vascularization (NV) when new blood vessels begin to appear (to compensate for the reduced blood supply and nutrition to the retina) finally qualifies for proliferative Diabetic Retinopathy. The idea is to extract the features of NPDR and depending on their intensity and frequency they can be graded into mild, moderate and severe. This automated grading can be matched with the specialist&#x27;s perception and its accuracy can be tested. In this work, we have proposed a computer based automated hybrid technique for the detection of stages of Non-Proliferative Diabetic Retinopathy (NPDR) retinopathy stage using the color fundus images. The features are extracted from the Sample images using the image processing techniques and fed to the support vector machine (SVM). After color normalization preprocessing stage, an evidence value for every pixel is calculated by SVM. Then a mathematical morphological technique, a fuzzy c-means clustering technique, PCA, a support vector machine and a nearest neighbor classifier for further processing. The SVM classifier uses features extracted by combined 2DPCA instead of explicit image features as the input vector Combined 2DPCA is proposed and virtual SVM is applied to achieve the higher accuracy of classification. We demonstrate a Sensitivity of 97.1% for the classifier with the Specificity of 98.3%. Thus, an automated system for diagnosis of NPDR can be a useful tool for the Specialist to support in screening an detection of early Diabetic Retinopathy changes and hence timely intervention leading to reduced DR(Diabetic retinopathy) related blindness.

Tetrabutylammonium Hydroxide/p-Toluenesulfonyl Chloride, a Novel Peptide Coupling Agent

Cheminform, 1992

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

FASA: A Software Architecture and Runtime Framework for Flexible Distributed Automation Systems

Journal of Systems Architecture, 2015

ABSTRACT Modern automation systems have to cope with large amounts of sensor data to be processed... more ABSTRACT Modern automation systems have to cope with large amounts of sensor data to be processed, stricter security requirements, heterogeneous hardware, and an increasing need for flexibility. The challenges for tomorrow&#39;s automation systems need software architectures of today&#39;s real-time controllers to evolve. This article presents FASA, a modern software architecture for next-generation automation systems. FASA provides concepts for scalable, flexible, and platform-independent real-time execution frameworks, which also provide advanced features such as software-based fault tolerance and high degrees of isolation and security. We show that FASA caters for robust execution of time-critical applications even in parallel execution environments such as multi-core processors. We present a reference implementation of FASA that controls a magnetic levitation device. This device is sensitive to any disturbance in its real-time control and thus, provides a suitable validation scenario. Our results show that FASA can sustain its advanced features even in high-speed control scenarios at 1 kHz.

The Use of Basic Resin in the Preparation of Tetrahydropyranyl Derivatives of Alcohols and Phenols

ChemInform, 2004

Multicomponent, solvent-free synthesis of β-aryl-β-mercapto ketones using zirconium chloride as a catalyst

Tetrahedron Letters, 2007

Zirconium chloride efficiently catalyzes the one-pot, three-component reaction of an aryl aldehyd... more Zirconium chloride efficiently catalyzes the one-pot, three-component reaction of an aryl aldehyde, cyclic or acyclic enolizable ketones, and thiols under solvent-free conditions at room temperature to afford the corresponding β-aryl-β-mercaptoketones via aldol-Michael addition reactions. This methodology affords a large number of β-aryl-β-mercapto ketone derivatives in high yields and in short reaction times.

Management of Posterior Capsule Tears

Survey of Ophthalmology, 2001

Any breach in the continuity of the posterior capsule is defined as a posterior capsule tear. Pos... more Any breach in the continuity of the posterior capsule is defined as a posterior capsule tear. Posterior capsule tears can be preexisting (congenital or traumatic), spontaneous, or intrasurgical. Preexisting/congenital posterior capsule tears have been related to an intrauterine insult. Posterior capsule tears due to trauma may occur as a consequence of direct mechanical impact due to perforation or blunt injury. Depending on the duration of time between the posterior capsular trauma and the cataract surgery, these posterior capsule tears can have different features. Intrasurgical posterior capsule tears are the most common and can occur during any stage of cataract surgery. Also, they may be planned in the form of primary posterior capsulorhexis. The conventional management consists of prevention of mixture of cortical matter with vitreous, dry aspiration, and anterior vitrectomy, if required. In addition, during phacoemulsification low flow rate, high vacuum, and low ultrasound are advocated if a posterior capsule tear occurs. Dislocated nucleus or nuclear fragments require vitrectomy and the use of perfluorocarbon liquids. In the presence of a posterior capsule tear, the IOL can be placed in the sulcus, if the capsular rim is available, or in the bag, if the tear is small. Scleral fixated posterior chamber lenses and anterior chamber IOLs can be implanted when the posterior capsule tear is large. ( Surv Ophthalmol 45 :473-488, 2001. © 2001 by Elsevier Science Inc. All rights reserved.) Key words. cataract surgery • complications of phacoemulsification • posterior capsule defect • posterior capsule rent • posterior capsule tear • posterior polar cataract • primary posterior capsulorhexis • trauma Surv Ophthalmol 45

Fuzzy Model: Time Dependent Dispersion in Rivers

Indian International Conference on Artificial Intelligence, 2009

A landmark based registration technique for minimally invasive spinal surgery

2013 IEEE International Symposium on Consumer Electronics (ISCE), 2013

ABSTRACT This paper proposed a technique for skin curve registration based on landmark detection ... more ABSTRACT This paper proposed a technique for skin curve registration based on landmark detection and calibrated camera-projector system for medical purpose. The technique applies the algorithm which registers a precalculated 3D model for the 2D images of the video frames. The algorithm first calculates the 3D locations of landmarks based upon the calibrated camera projector system and the matching the landmarks in the 3D model using CT-scan. We then generate the image to be projected on the skin curve of a patient from the registered 3D spinal model, and it is created for projecting on the pork or real patient for surgeons to process surgical procedure by utilizing their natural eyes system. The experiments demonstrate the proposed registration method on both animal and real patient and evaluated by several surgeons for spinal surgery.

Distinguishing normal and pulmonary edema chest x-ray using Gabor filter and SVM

2014 IEEE International Symposium on Bioelectronics and Bioinformatics (IEEE ISBB 2014), 2014

ABSTRACT

Controlled secret sharing protocol using a quantum cloning circuit

Quantum Information Processing, 2014

We demonstrate the possibility of controlling the success probability of a secret sharing protoco... more We demonstrate the possibility of controlling the success probability of a secret sharing protocol using a quantum cloning circuit. The cloning circuit is used to clone the qubits containing the encoded information and en route to the intended receipients. The success probability of the protocol depends on the cloning parameters used to clone the qubits. We also establish a relation between the concurrence of initially prepared state, entanglement of the mixed state received by the receivers after cloning scheme and the cloning parameters of cloning machine. * [email protected]