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Search Results: 1 - 10 of 2275 matches for " Anurag Verma "
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Detection of Ventricular Fibrillation Using Random Forest Classifier  [PDF]
Anurag Verma, Xiaodai Dong
Journal of Biomedical Science and Engineering (JBiSE) , 2016, DOI: 10.4236/jbise.2016.95019
Abstract: Early warning and detection of ventricular fibrillation is crucial to the successful treatment of this life-threatening condition. In this paper, a ventricular fibrillation classification algorithm using a machine learning method, random forest, is proposed. A total of 17 previously defined ECG feature metrics were extracted from fixed length segments of the echocardiogram (ECG). Three annotated public domain ECG databases (Creighton University Ventricular Tachycardia database, MIT-BIH Arrhythmia Database and MIT-BIH Malignant Ventricular Arrhythmia Database) were used for evaluation of the proposed method. Window sizes 3 s, 5 s and 8 s for overlapping and non-overlapping segmentation methodologies were tested. An accuracy (Acc) of 97.17%, sensitivity (Se) of 95.17% and specificity (Sp) of 97.32% were obtained with 8 s window size for overlapping segments. The results were benchmarked against recent reported results and were found to outper-form them with lower complexity.
A Cost-Effective Wind Power-Driven RO Plant for Treatment of Brackish Water  [PDF]
Shivendra Verma, Ramsingh Meena, Anurag Mudgal
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.310007
Abstract:

Desalination has often been perceived as a high cost means of producing water. Reason being that some of the water treatment methods use electricity to run a pump as in Reverse Osmosis system and some uses thermal energy to produce steam as in Multi Effect Distillation. High cost and less availability of conventional fuels has attracted the focus of researchers to explore other unconventional means and methods to purify water. This paper explores the possibility of using wind power for water treatment. In costal countries, tremendous wind power is available at the coastline which may be used to drive a RO plant. In India particularly, the average wind speed calculated along the coastlines of Gujarat state gives a fair idea about potential of energy that can be generated. This energy can be harnessed to run a rotating pump, or a piston-cylinder arrangement coupled with RO module to provide the necessary pressure required to push saline water through the membrane. Along the western coast of India there is an abundance of wind energy to capitulate high amount of energy in terms of electrical Power. If the rotor diameter is 4 feet (1.3 m) and located at a height of 8 feet (2.5 m), each wind turbine may produce power of around 2 KW. This power may be used to run the reciprocating pump which provides pressure to the RO Apparatus. The paper describes recent advancements in the wind industries technology to produce electrical energy at low cost but it concentrates more on coupling wind energy directly with RO module to save energy conversion cost which is a seldom or different approach than converting electrical energy to mechanical energy for running of RO system.

FORWARD KINEMATICS ANALYSIS OF 6-DOF ARC WELDING ROBOT
DR. ANURAG VERMA,MEHUL GOR
International Journal of Engineering Science and Technology , 2010,
Abstract: The forward kinematics problem is concerned with the relationship between the individual joints of the robot manipulator and the position and orientation of the tool or end-effector. Stated more formally, the forward kinematics problem is to determine the position and orientation of the end-effector, given the values for the jointvariables of the robot. Present work is an attempt to develop kinematic model of a 6 DOF robot which is used for arc welding operation. Developed model will determine position and orientation of the end-effector with respect to various joint variables. The said analysis is carried out in Matlab.
Integrated Routing Protocol for Opportunistic Networks
Anshul Verma,Dr. Anurag Srivastava
International Journal of Advanced Computer Sciences and Applications , 2011,
Abstract: In opportunistic networks the existence of a simultaneous path is not assumed to transmit a message between a sender and a receiver. Information about the context in which the users communicate is a key piece of knowledge to design efficient routing protocols in opportunistic networks. But this kind of information is not always available. When users are very isolated, context information cannot be distributed, and cannot be used for taking efficient routing decisions. In such cases, context oblivious based schemes are only way to enable communication between users. As soon as users become more social, context data spreads in the network, and context based routing becomes an efficient solution. In this paper we design an integrated routing protocol that is able to use context data as soon as it becomes available and falls back to dissemination-based routing when context information is not available. Then, we provide a comparison between Epidemic and PROPHET, these are representative of context oblivious and context aware routing protocols. Our results show that integrated routing protocol is able to provide better result in term of message delivery probability and message delay in both cases when context information about users is available or not.
Integrated Routing Protocol for Opportunistic Networks
Anshul Verma,Dr. Anurag Srivastava
Computer Science , 2012,
Abstract: In opportunistic networks the existence of a simultaneous path is not assumed to transmit a message between a sender and a receiver. Information about the context in which the users communicate is a key piece of knowledge to design efficient routing protocols in opportunistic networks. But this kind of information is not always available. When users are very isolated, context information cannot be distributed, and cannot be used for taking efficient routing decisions. In such cases, context oblivious based schemes are only way to enable communication between users. As soon as users become more social, context data spreads in the network, and context based routing becomes an efficient solution. In this paper we design an integrated routing protocol that is able to use context data as soon as it becomes available and falls back to dissemination based routing when context information is not available. Then, we provide a comparison between Epidemic and PROPHET, these are representative of context oblivious and context aware routing protocols. Our results show that integrated routing protocol is able to provide better result in term of message delivery probability and message delay in both cases when context information about users is available or not.
A new technique to implement SVC in optimal power flow
Satyendra Singh,Anurag Tripathi,K. S. Verma
Journal of Engineering and Applied Sciences , 2011,
Abstract: The objective of an Optimal Power Flow (OPF) algorithm is to find steady state operating point which minimizes generation cost loss etc. or maximizes social welfare, load ability etc. while maintaining an acceptable system performance in terms of limits on generators’ real and reactive powers, line flow limits, output of various compensating devices etc. Traditionally, classical optimization methods were used to effectively solve OPF. But more recently due to incorporation of FACTS devices and deregulation of a power sector, the traditional concepts and practices of power systems are superimposed by an economic market management. So OPF have become complex. In recent years, Artificial Intelligence (AI) methods have emerged which can solve highly complex OPF problems. The purpose of this paper is to present a study of some optimization techniques used to solve OPF problems and a technique for optimal sizing and implementation of the SVC in optimal power flow. A 26-bus system has been studied to show the effectiveness of the algorithm.
ANALYSIS OF SPATIAL MECHANISM IN DYNAMIC EQUILIBRIUM CONDITION USING MATLAB
KAUSHIK V. PATEL,,DR ANURAG VERMA
International Journal of Engineering Science and Technology , 2011,
Abstract: Over the last two decades, spatial mechanisms evolved from rather marginal machines to widely used mechanical architectures. The use of computer in kinematic and dynamic simulation has a powerful toolfor the analysis and design of multi body systems in fields such as automobile industry, aerospace, robotics, machinery, biomechanics, and others. The purpose of this work is to describe use of kinematicand dynamic simulation, and advanced topics. For a kinematic chain it is important to know how forces and moments are transmitted from the input to the output, so that the links can be properly designated.Idea present here has been implemented with MatLab Program and it is used for analysis of mechanism in dynamic equilibrium condition.
Microemulsion: New Insights into the Ocular Drug Delivery
Rahul Rama Hegde,Anurag Verma,Amitava Ghosh
ISRN Pharmaceutics , 2013, DOI: 10.1155/2013/826798
Abstract: Delivery of drugs into eyes using conventional drug delivery systems, such as solutions, is a considerable challenge to the treatment of ocular diseases. Drug loss from the ocular surface by lachrymal fluid secretion, lachrymal fluid-eye barriers, and blood-ocular barriers are main obstacles. A number of ophthalmic drug delivery carriers have been made to improve the bioavailability and to prolong the residence time of drugs applied topically onto the eye. The potential use of microemulsions as an ocular drug delivery carrier offers several favorable pharmaceutical and biopharmaceutical properties such as their excellent thermodynamic stability, phase transition to liquid-crystal state, very low surface tension, and small droplet size, which may result in improved ocular drug retention, extended duration of action, high ocular absorption, and permeation of loaded drugs. Further, both lipophilic and hydrophilic characteristics are present in microemulsions, so that the loaded drugs can diffuse passively as well get significantly partitioned in the variable lipophilic-hydrophilic corneal barrier. This review will provide an insight into previous studies on microemulsions for ocular delivery of drugs using various nonionic surfactants, cosurfactants, and associated irritation potential on the ocular surface. The reported in vivo experiments have shown a delayed effect of drug incorporated in microemulsion and an increase in the corneal permeation of the drug. 1. Introduction The human eye is a complex structure designed in such a way that its anatomy, physiology, and biochemistry render it almost impervious to foreign agents, including drugs. The human eye has two segments, that is, anterior segment (cornea, conjunctiva, etc.) and posterior segment (vitreous humor, retina, etc.) as shown in detail in Figure 1. The human corneal epithelium represents one of the major rate-limiting barriers which hinders permeation of hydrophilic drugs and macromolecules. Another rate-limiting barrier is stroma which prevents diffusion of highly lipophilic drugs due to abundant hydrated collagen contents [1]. Other significant barriers include lacrimal fluid secretion and lachrymal fluid-eye barriers. Considering these barriers, it is very challenging to develop ocular drug delivery systems which can circumvent these protective barriers and deliver the drug to the posterior segment of the eye without causing permanent tissue damage [2]. Conventional dosage forms like ophthalmic solutions, suspensions, and so forth, are now primordial as they can only deliver the drug to the
Di-n-butyltin(IV) Complexes Derived from Heterocyclic β-diketones and N-Phthaloyl Amino Acids: Preparation, Biological Evaluation, Structural Elucidation Based upon Spectral [IR, NMR (1H, 13C, 19F and 119Sn)] Studies
Anurag Joshi,Shashi Verma,R. B. Gaurb,R. R. Sharma
Bioinorganic Chemistry and Applications , 2005, DOI: 10.1155/bca.2005.201
Abstract: Stable, six coordinated Bu2SnLA type complexes have been prepared [where LH = RCOC:C(OH)N(C6H5)N:︹CCH3; R = -4-F-C6H4-(L1H), R = -4-Cl-C6H4-(L2H), R= -4-Br-C6H4-(L3H), R= -CF3(L4H) and AH=C(O)C6H4C(O)︹NCHR′COOH; R'= -H(A1H), -CH3(A2H), -CH(CH3)2(A3H)] by the interaction of 1:1:1 molar ratios of di-n-butyltin(IV) dichloride with corresponding organic moieties in refluxing benzene using two moles of Et3N as a base. In these complexes LH and AH behave as bidentate and coordination is taking place through oxygen, this is inferred from IR and 13C NMR studies. These complexes possess tin atoms in skew trapezoidal bipyramidal geometry with the C-Sn-C angles ranging from 149.88° to 156.84°. Some of these complexes with their corresponding organic moieties (LH, AH) were tested for their antimicrobial activities.
Issues & comparison of images for excellent results by IP
Ajay Sharma,C. Khare,Sanjay Verma,Anurag Garg
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: In this paper, different well-known features for image processing specially for the comparison of images are studied, compared and their correlation is analyzed. The features form the basis for the comparison process and performance of the comparison strategy is very much depending upon these features. The study of different features either it is local or global features, which can be used as a basis for an appropriate choice of features or Descriptors. In the past a systematic analysis of image retrieval systems or features was often difficult because different studies usually used different data sets and no common performance measures were established.
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