Proceedings of the Combustion Institute, Jan 31, 2007
This paper reports experimental and numerical investigations on the combustion characteristics of... more This paper reports experimental and numerical investigations on the combustion characteristics of a lean methane–air mixture in a heated porous sand bed. The porous bed consisted of sand (SiO2) particles with a mean particle diameter of 0.56 mm. The horizontally placed quartz tube was heated externally to initiate the combustion reaction in the porous bed combustor. The stabilized flame location curve as a function of averaged mixture velocity was obtained for various equivalence ratios. Contrary to the earlier finding ...
An Evaluation of National Iodine Disorder Deficiency Control Programme (NIDDCP) in India was unde... more An Evaluation of National Iodine Disorder Deficiency Control Programme (NIDDCP) in India was undertaken by National Institute of Health and Family Welfare on the behest of Ministry of Health and Family Welfare in the year 2005-06 in ten States of the country selected from North, East, South, West and Central Regions. The objective of evaluation was to find out the level of awareness about use of iodised salt by the community. The data was collected using semi-structured interview schedules from households regarding knowledge, attitude and behavior about consumption of salt. Salt samples from 2404 households, both from urban and rural areas, were tested on the spot using MBI kits. It was found that more than 72 per cent respondents were aware about the iodised salt. Regarding ban on sale of uniodised salt, only 10 per cent respondents were aware. Except Giotre, other ill-effects of IDDs were hardly known to the community. Major source of information about this awareness was televisio...
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 2014
Naphthenic acids are a complex mixture of organic components, some of which include saturated alk... more Naphthenic acids are a complex mixture of organic components, some of which include saturated alkyl-substituted cycloaliphatic carboxylic acids and acyclic aliphatic acids. They are naturally found in hydrocarbon deposits like oil sand, petroleum, bitumen and crude oil. In this study, the oxidation of a relatively high molecular weight naphthenic acid (Dicyclohexyl acetic acid) was investigated using ozonation, ultrasonication and hydrogen peroxide alone and their combinations. Effects on oxidation of dicyclohexyl acetic acid (DAA) were measured for different concentrations of ozone ranging between 0.7 to 3.3 mg L(-1) and pH in the range 6 to 10. Ultrasonication and hydrogen peroxide alone were not effective to oxidize dicyclohexyl acetic acid, but combining ultrasonication with H2O2 had a significant effect on oxidation of dicyclohexyl acetic acid with maximum removal reaching to 84 ± 2.2% with 81 ± 2.1% reduction in chemical oxygen demand (COD). Synergistic effects were observed f...
Page 1. In continuation to our investigation on Withania somnifera,1 we report here on the crysta... more Page 1. In continuation to our investigation on Withania somnifera,1 we report here on the crystal structure of a withanolide, 5β,6β- epoxy-4β,27-dihydroxy-1-oxo-22R-witha-2,24-dienolide (withaferin A), isolated from the 95% alcohol extract of the leaves of Withania somnifera. ...
... [5] WB Heinzelman, AP Chandrakasan and H. Balakrishnan, “An Application-Specific Protocol ...... more ... [5] WB Heinzelman, AP Chandrakasan and H. Balakrishnan, “An Application-Specific Protocol ... [8] TC Tozer and D. Grace, “High-altitude platforms for wireless communications”, Electronics and Communication Engineering Journal, vol. 13, no. 3, pp.127-137, June 2001. ...
Hyperglycemia is the most important contributor in the onset and progress of diabetic complicatio... more Hyperglycemia is the most important contributor in the onset and progress of diabetic complications mainly by producing oxidative stress. The present study was carried out to observe, the antihyperglycemic effect of sodium orthovanadate (SOV) and Trigonella foenum graecum seed powder (TSP) administration on blood glucose and insulin levels, membrane linked enzymes (monoamine oxidase, acetylcholinesterase, Ca2+ATPase), intracellular calcium (Ca2+) levels, lipid peroxidation, membrane fluidity and neurolipofuscin accumulation in brain of the alloxan induced diabetic rats and to see whether the treatment with SOV and TSP was capable of reversing the diabetic effects. Diabetes was induced by administration of alloxan monohydrate (15 mg/100 g body weight) and rats were treated with 2 IU insulin, 0.6 mg/ml SOV, 5% TSP in the diet and a combination of 0.2 mg/ml SOV and 5% TSP separately for three weeks. Diabetic rats showed hyperglycemia with almost four fold high blood glucose levels. Act...
2013 IEEE 10th International Conference on Ubiquitous Intelligence and Computing and 2013 IEEE 10th International Conference on Autonomic and Trusted Computing, 2013
ABSTRACT Security is a paramount requirement in any modern technology. This also applies to wirel... more ABSTRACT Security is a paramount requirement in any modern technology. This also applies to wireless sensor networks (WSNs), where sensor nodes have severe resources scarcity. Recently the presence of mobile object (e.g., moving robot, vehicle, etc) has shown their great impact on WSNs. However, as the low-cost sensor networks become wide-spread, secret key distribution to the sensor nodes is a challenging task in such unattended WSNs. In this regards, this paper presents a mobile object-based secret key distribution scheme for resource hungry sensor nodes. The key idea is that a mobile object should visit all the sensor nodes along its pre-defined path and distribute secret keys within its broadcasting range. The proposed scheme exploits the symmetric cryptographic approach. The feasibility of proposed scheme is advocated using real testbed experiments. The analysis reveals that the proposed scheme attains high efficiency (in terms of computation and communication costs), and provides strong security.
2014 IEEE Wireless Communications and Networking Conference (WCNC), 2014
ABSTRACT In the centralized Wireless Sensor Network (WSN) architecture there exists a central ent... more ABSTRACT In the centralized Wireless Sensor Network (WSN) architecture there exists a central entity, which acquires, processes and provides information from sensor nodes. Conversely, in the WSN applications in distributed Internet of Things (IoT) architecture, sensor nodes sense data, process, exchange information and perform collaboratively with other sensor nodes and endusers. In order to maintain the trustworthy connectivity and the accessibility of distributed IoT, it is important to establish secure links for end-to-end communication with proper authentication. The authors propose an implicit certificate-based authentication mechanism for WSNs in distributed IoT applications. The developed two-phase authentication protocol allows the sensor nodes and the end-users to authenticate each other and initiate secure connections. The proposed protocol supports the resource scarcity of the sensor nodes, heterogeneity and scalability of the network. The performance and security analysis justify that the proposed scheme is viable to deploy in resource constrained WSNs.
Free radical production and oxidative stress are known to increase in liver during aging, and may... more Free radical production and oxidative stress are known to increase in liver during aging, and may contribute to the oxidative damage. These changes increase during menopausal condition in females when the level of estradiol is decreased. The objective of this study was to observe the changes in activities of membrane linked ATPases (Na(+)K(+) ATPase, Ca(2+) ATPase), antioxidant enzymes (superoxide dismutase, glutathione-S-transferase), lipid peroxidation levels, lipofuscin content and membrane fluidity occurring in livers of female rats of 3, 12 and 24 months age groups, and to see whether these changes are restored to 3 months control levels rats after exogenous administration of 17-β-estradiol (E2). The aged rats (12 and 24 months) were given subcutaneous injection of E2 (0.1 μg/g body weight) daily for one month. The results obtained in the present work revealed that normal aging was associated with significant decrease in the activities of membrane linked ATPases, antioxidant en...
16th International Conference on Advanced Communication Technology, 2014
ABSTRACT Wireless medical sensor networks, also called e-Healthcare systems, provide mobility to ... more ABSTRACT Wireless medical sensor networks, also called e-Healthcare systems, provide mobility to the patients for making life easier and comfortable. However, a secure mobility support is highly desirable to a patient while he/she is moving. In this paper, we discuss security issues facing mobility supported e-Healthcare applications, and propose a secure session-key scheme for addressing security issues. The proposed scheme is suitable for the e-Healthcare systems where a patient is allowed to move and stay connected, securely. The proposed scheme not only establishes a session-key but according to HEPAA acts it also performs robust authenticity for the (mobile) medical sensor, the fixed access point, and the base-station. Our preliminary evaluation shows that the proposed scheme is feasible in-hospital, in-clinic, and homecare environments.
AbstractRouting is a general task, yet the implementation of routing protocols requires specific... more AbstractRouting is a general task, yet the implementation of routing protocols requires specific operating system related knowledge. The developer has to deal with particular kernel internals that might have severe side effects. This is especially true for reactive and hybrid ...
The ef fect of sus pended par ti cles on the ther mal in sta bil ity of Walters B&amp... more The ef fect of sus pended par ti cles on the ther mal in sta bil ity of Walters B' viscoelastic fluid in hydromagnetics in po rous me dium is con sid ered. For sta tion ary con vec tion, Walters B' viscoelastic fluid be haves like a New to nian fluid. The me dium per me abil ity and sus ...
World Journal of Microbiology and Biotechnology, 2007
Thermomucor indicae-seudaticae was immobilized in alginate, κ-carrageenan, agarose, agar, polyacr... more Thermomucor indicae-seudaticae was immobilized in alginate, κ-carrageenan, agarose, agar, polyacrylamide and loofah (Luffa cylindrica) sponge (as such or coated with alginate/starch/Emerson YpSs agar), and used for the production of glucoamylase in submerged fermentation. The mycelium developed from alginate-immobilized sporangiospores secreted higher glucoamylase titres (22.7 U ml−1) than those immobilized in other gel matrices and the freely growing mycelial pellets (18.5 U ml−1). Loofah network
A non-aqueous phase liquid (NAPL) containing dissolved naphthalene or phenol was used to simulate... more A non-aqueous phase liquid (NAPL) containing dissolved naphthalene or phenol was used to simulate water insoluble contaminants which are produced during the processing of oil sands. Mass transfer and biodegradation of organic contaminants in the aqueous phase ...
The Rayleigh−Taylor instability of Walters B′ viscoelastic fluids in a porous medium in the prese... more The Rayleigh−Taylor instability of Walters B′ viscoelastic fluids in a porous medium in the presence of uniform rotation and a variable magnetic field is considered. The magnetic field, viscosity, viscoelasticity, and density are assumed to be exponentially varying. For stable density ...
Proceedings of the Combustion Institute, Jan 31, 2007
This paper reports experimental and numerical investigations on the combustion characteristics of... more This paper reports experimental and numerical investigations on the combustion characteristics of a lean methane–air mixture in a heated porous sand bed. The porous bed consisted of sand (SiO2) particles with a mean particle diameter of 0.56 mm. The horizontally placed quartz tube was heated externally to initiate the combustion reaction in the porous bed combustor. The stabilized flame location curve as a function of averaged mixture velocity was obtained for various equivalence ratios. Contrary to the earlier finding ...
An Evaluation of National Iodine Disorder Deficiency Control Programme (NIDDCP) in India was unde... more An Evaluation of National Iodine Disorder Deficiency Control Programme (NIDDCP) in India was undertaken by National Institute of Health and Family Welfare on the behest of Ministry of Health and Family Welfare in the year 2005-06 in ten States of the country selected from North, East, South, West and Central Regions. The objective of evaluation was to find out the level of awareness about use of iodised salt by the community. The data was collected using semi-structured interview schedules from households regarding knowledge, attitude and behavior about consumption of salt. Salt samples from 2404 households, both from urban and rural areas, were tested on the spot using MBI kits. It was found that more than 72 per cent respondents were aware about the iodised salt. Regarding ban on sale of uniodised salt, only 10 per cent respondents were aware. Except Giotre, other ill-effects of IDDs were hardly known to the community. Major source of information about this awareness was televisio...
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 2014
Naphthenic acids are a complex mixture of organic components, some of which include saturated alk... more Naphthenic acids are a complex mixture of organic components, some of which include saturated alkyl-substituted cycloaliphatic carboxylic acids and acyclic aliphatic acids. They are naturally found in hydrocarbon deposits like oil sand, petroleum, bitumen and crude oil. In this study, the oxidation of a relatively high molecular weight naphthenic acid (Dicyclohexyl acetic acid) was investigated using ozonation, ultrasonication and hydrogen peroxide alone and their combinations. Effects on oxidation of dicyclohexyl acetic acid (DAA) were measured for different concentrations of ozone ranging between 0.7 to 3.3 mg L(-1) and pH in the range 6 to 10. Ultrasonication and hydrogen peroxide alone were not effective to oxidize dicyclohexyl acetic acid, but combining ultrasonication with H2O2 had a significant effect on oxidation of dicyclohexyl acetic acid with maximum removal reaching to 84 ± 2.2% with 81 ± 2.1% reduction in chemical oxygen demand (COD). Synergistic effects were observed f...
Page 1. In continuation to our investigation on Withania somnifera,1 we report here on the crysta... more Page 1. In continuation to our investigation on Withania somnifera,1 we report here on the crystal structure of a withanolide, 5β,6β- epoxy-4β,27-dihydroxy-1-oxo-22R-witha-2,24-dienolide (withaferin A), isolated from the 95% alcohol extract of the leaves of Withania somnifera. ...
... [5] WB Heinzelman, AP Chandrakasan and H. Balakrishnan, “An Application-Specific Protocol ...... more ... [5] WB Heinzelman, AP Chandrakasan and H. Balakrishnan, “An Application-Specific Protocol ... [8] TC Tozer and D. Grace, “High-altitude platforms for wireless communications”, Electronics and Communication Engineering Journal, vol. 13, no. 3, pp.127-137, June 2001. ...
Hyperglycemia is the most important contributor in the onset and progress of diabetic complicatio... more Hyperglycemia is the most important contributor in the onset and progress of diabetic complications mainly by producing oxidative stress. The present study was carried out to observe, the antihyperglycemic effect of sodium orthovanadate (SOV) and Trigonella foenum graecum seed powder (TSP) administration on blood glucose and insulin levels, membrane linked enzymes (monoamine oxidase, acetylcholinesterase, Ca2+ATPase), intracellular calcium (Ca2+) levels, lipid peroxidation, membrane fluidity and neurolipofuscin accumulation in brain of the alloxan induced diabetic rats and to see whether the treatment with SOV and TSP was capable of reversing the diabetic effects. Diabetes was induced by administration of alloxan monohydrate (15 mg/100 g body weight) and rats were treated with 2 IU insulin, 0.6 mg/ml SOV, 5% TSP in the diet and a combination of 0.2 mg/ml SOV and 5% TSP separately for three weeks. Diabetic rats showed hyperglycemia with almost four fold high blood glucose levels. Act...
2013 IEEE 10th International Conference on Ubiquitous Intelligence and Computing and 2013 IEEE 10th International Conference on Autonomic and Trusted Computing, 2013
ABSTRACT Security is a paramount requirement in any modern technology. This also applies to wirel... more ABSTRACT Security is a paramount requirement in any modern technology. This also applies to wireless sensor networks (WSNs), where sensor nodes have severe resources scarcity. Recently the presence of mobile object (e.g., moving robot, vehicle, etc) has shown their great impact on WSNs. However, as the low-cost sensor networks become wide-spread, secret key distribution to the sensor nodes is a challenging task in such unattended WSNs. In this regards, this paper presents a mobile object-based secret key distribution scheme for resource hungry sensor nodes. The key idea is that a mobile object should visit all the sensor nodes along its pre-defined path and distribute secret keys within its broadcasting range. The proposed scheme exploits the symmetric cryptographic approach. The feasibility of proposed scheme is advocated using real testbed experiments. The analysis reveals that the proposed scheme attains high efficiency (in terms of computation and communication costs), and provides strong security.
2014 IEEE Wireless Communications and Networking Conference (WCNC), 2014
ABSTRACT In the centralized Wireless Sensor Network (WSN) architecture there exists a central ent... more ABSTRACT In the centralized Wireless Sensor Network (WSN) architecture there exists a central entity, which acquires, processes and provides information from sensor nodes. Conversely, in the WSN applications in distributed Internet of Things (IoT) architecture, sensor nodes sense data, process, exchange information and perform collaboratively with other sensor nodes and endusers. In order to maintain the trustworthy connectivity and the accessibility of distributed IoT, it is important to establish secure links for end-to-end communication with proper authentication. The authors propose an implicit certificate-based authentication mechanism for WSNs in distributed IoT applications. The developed two-phase authentication protocol allows the sensor nodes and the end-users to authenticate each other and initiate secure connections. The proposed protocol supports the resource scarcity of the sensor nodes, heterogeneity and scalability of the network. The performance and security analysis justify that the proposed scheme is viable to deploy in resource constrained WSNs.
Free radical production and oxidative stress are known to increase in liver during aging, and may... more Free radical production and oxidative stress are known to increase in liver during aging, and may contribute to the oxidative damage. These changes increase during menopausal condition in females when the level of estradiol is decreased. The objective of this study was to observe the changes in activities of membrane linked ATPases (Na(+)K(+) ATPase, Ca(2+) ATPase), antioxidant enzymes (superoxide dismutase, glutathione-S-transferase), lipid peroxidation levels, lipofuscin content and membrane fluidity occurring in livers of female rats of 3, 12 and 24 months age groups, and to see whether these changes are restored to 3 months control levels rats after exogenous administration of 17-β-estradiol (E2). The aged rats (12 and 24 months) were given subcutaneous injection of E2 (0.1 μg/g body weight) daily for one month. The results obtained in the present work revealed that normal aging was associated with significant decrease in the activities of membrane linked ATPases, antioxidant en...
16th International Conference on Advanced Communication Technology, 2014
ABSTRACT Wireless medical sensor networks, also called e-Healthcare systems, provide mobility to ... more ABSTRACT Wireless medical sensor networks, also called e-Healthcare systems, provide mobility to the patients for making life easier and comfortable. However, a secure mobility support is highly desirable to a patient while he/she is moving. In this paper, we discuss security issues facing mobility supported e-Healthcare applications, and propose a secure session-key scheme for addressing security issues. The proposed scheme is suitable for the e-Healthcare systems where a patient is allowed to move and stay connected, securely. The proposed scheme not only establishes a session-key but according to HEPAA acts it also performs robust authenticity for the (mobile) medical sensor, the fixed access point, and the base-station. Our preliminary evaluation shows that the proposed scheme is feasible in-hospital, in-clinic, and homecare environments.
AbstractRouting is a general task, yet the implementation of routing protocols requires specific... more AbstractRouting is a general task, yet the implementation of routing protocols requires specific operating system related knowledge. The developer has to deal with particular kernel internals that might have severe side effects. This is especially true for reactive and hybrid ...
The ef fect of sus pended par ti cles on the ther mal in sta bil ity of Walters B&amp... more The ef fect of sus pended par ti cles on the ther mal in sta bil ity of Walters B' viscoelastic fluid in hydromagnetics in po rous me dium is con sid ered. For sta tion ary con vec tion, Walters B' viscoelastic fluid be haves like a New to nian fluid. The me dium per me abil ity and sus ...
World Journal of Microbiology and Biotechnology, 2007
Thermomucor indicae-seudaticae was immobilized in alginate, κ-carrageenan, agarose, agar, polyacr... more Thermomucor indicae-seudaticae was immobilized in alginate, κ-carrageenan, agarose, agar, polyacrylamide and loofah (Luffa cylindrica) sponge (as such or coated with alginate/starch/Emerson YpSs agar), and used for the production of glucoamylase in submerged fermentation. The mycelium developed from alginate-immobilized sporangiospores secreted higher glucoamylase titres (22.7 U ml−1) than those immobilized in other gel matrices and the freely growing mycelial pellets (18.5 U ml−1). Loofah network
A non-aqueous phase liquid (NAPL) containing dissolved naphthalene or phenol was used to simulate... more A non-aqueous phase liquid (NAPL) containing dissolved naphthalene or phenol was used to simulate water insoluble contaminants which are produced during the processing of oil sands. Mass transfer and biodegradation of organic contaminants in the aqueous phase ...
The Rayleigh−Taylor instability of Walters B′ viscoelastic fluids in a porous medium in the prese... more The Rayleigh−Taylor instability of Walters B′ viscoelastic fluids in a porous medium in the presence of uniform rotation and a variable magnetic field is considered. The magnetic field, viscosity, viscoelasticity, and density are assumed to be exponentially varying. For stable density ...
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