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Gaurav Sharma

Other affiliations: Northeastern University, D. E. Shaw & Co., Hewlett-Packard  ...read more
Bio: Gaurav Sharma is an academic researcher from Shenzhen University. The author has contributed to research in topics: Medicine & Photocatalysis. The author has an hindex of 82, co-authored 1244 publications receiving 31482 citations. Previous affiliations of Gaurav Sharma include Northeastern University & D. E. Shaw & Co..


Papers
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Proceedings ArticleDOI
19 Mar 2015
TL;DR: This paper explores the utilization of logic with memristors, and includes the preferred logic family for each type of memristor, and advantages and disadvantages of each logic family.
Abstract: Memristor's main attribute is a varying resistance with the memory, Hence the name memory and resistor. So far the primary applications explored for memristors where in the field of memory arrays and neuromorphic networks. This paper explores the utilization of logic with memristors. Due to the fact that the field is in its early stages of research, various types of memristor models exist, and there is no wide consensus as to which one best describes the physical properties. In order for the research to relevant in any case, hybrid memristor model is considered. Logic family of memristor is considered. memristors as logic within memory, memristors as computation units. The paper also include the preferred logic family for each type of memristor, and advantages and disadvantages of each logic family.

5 citations

Journal Article
TL;DR: In this paper, performance of ad-hoc routing protocols as AODV, DSR and DYMO are analyzed under the effect of two shadowing model, as Constant and Lognormal.
Abstract: recent years, with the increasing use of laptops, iPods', PDA, etc. the demand for ad-hoc networks has been increased. Mobile ad-hoc network (MANET) is a network used to provide communication among various devices without any need for pre-existing infrastructure. MANET is formed by mobile nodes connected by wireless links without access points and backbone networks. It can be used for various applications as disaster management, conferences, military operations, rescue operations, and many more. Routing Protocols, other than conventional protocols are required for routing purposes in MANET. In this paper, performance of ad-hoc routing protocols as AODV, DSR and DYMO are analyzed under the effect of two shadowing model, as Constant and Lognormal. KeywordsAd-hoc networks, AODV, Constant Shadowing model, Lognormal Shadowing model, DSR, DYMO.

5 citations

Journal ArticleDOI
TL;DR: The experimental results have been further validated and demonstrated in order to justify the claims of the proposed approach, being able to tackle out different priority tasks and resource allocation in a stable and optimum manner.
Abstract: This research paper proposes a novel approach named priority-based load balancing (PLB) for cloud computing environment. The PLB provides a resilient and adaptive task scheduling using multi-queues. Numerous strategies have already been proposed in the past researches to prioritize the tasks and mapping all the tasks to different resources available on the cloud. There is still a hindrance in the performance due to the negligible attention paid to the unused resources and tasks having low priority, eventually leading to starvation problem. To this end, the PLB algorithm has been partitioned into four sub-procedures, namely (i) Starvation-free task allocation, (ii) Inserting tasks into the dispatcher, (iii) Re-ordering tasks inside the queues and eventually, (iv) Mapping tasks onto the Virtual Machines (VMs) calculating the cost incurred for all the corresponding VMs. The sole motivation of this research work is to optimize the performance parameters by allocating all the jobs to all the available resources in the workflow model. It also consolidates the job categorization in the priority-based multi-queues, while filtering tasks from all the queues to overcome the deprivation of low priority tasks. In this paper, a test-bed setup has been deployed using CloudSim 3 and TCS WAN emulator for experimentation and results evaluation. The experimental setup imbibes different aspects such as performance measures, average response time, makespan time in order to ascertain efficiency, resource utilization ratio and bandwidth of the workflow model. The obtained results are further compared with five different approaches including- First Come First Serve, Round Robin, Min–Min, Max–Min and ACO and it was observed that the proposed strategy yielded more efficiency and accuracy in most of the cases. The experimental results have been further validated and demonstrated in order to justify the claims of the proposed approach, being able to tackle out different priority tasks and resource allocation in a stable and optimum manner.

5 citations

Journal ArticleDOI
TL;DR: In this article, the authors used a simple plain chest X-ray to confirm the diagnosis of pulmonary embolisms using arterial hypoxemia and characteristic perfusion defect(s) on lung scans.
Abstract: Although there is an increasing recognition of pulmonary embolism (PE) as a major contributory factor to the mortality and morbidity of hospitalized patients, the disease continues to present difficult diagnostic problems. Recent clinical studies employing perfusion lung scan and selective pulmonary angiogram as diagnostic screening tests indicate that fatal PE occurs in about 5 patients per 1000 inpatients ( 1) and nonfatal PE in 20 per 1000 inpatients (2). On an annual basis, this incidence rate yields a total of approximately 140,000 fatal and 560,000 nonfatal pulmonary­ embolism cases each year. While the mortality of untreated PE is high, ranging from 18% (3) to 38% (4), that of treated PE is relatively low-8% (5). It is therefore important that the clinician be aware of the implication of the above observations and institute appropriate measures for early diagnosis and treatment in the sus­ pected patient. Diagnosis, however, may often be difficult, and at times, impossible. The diagnosis of PE can be made at the clinical level if a patient with no prior heart or lung disease presents with a history of thrombophlebitis, sudden onset of dyspnea, pleuritic pain, hemoptysis, and has minimal findings on physical examination and a "normal-looking" plain chest X ray. The clinical diagnosis may be confirmed by documentation of arterial hypoxemia and characteristic perfusion defect(s) on lung scanning. Such a presentation is so "typical" that further confirmation by selective pulmonary angiography may even be considered unnecessary. Unfortunately, how­ ever, the manifestations of pulmonary embolic disease are rarely so typical and the diagnosis rarely so easy. In the great majority of patients, the disease presents in an

5 citations

Journal ArticleDOI
TL;DR: The proposed algorithm tries to reduce RREQ packets which are broadcasted in original AODV to find routing paths and makes use of busyness of nodes while selecting nodes to participate in route discovery mechanism.
Abstract: We propose a routing algorithm based on AODV approach. We have modified AODV algorithm to obtain better performance. At the same time, we have tried to maintain the features of AODV algorithm by maintaining a backward compatibility in our proposed algorithm. Our algorithm tries to reduce RREQ packets which are broadcasted in original AODV to find routing paths. For this purpose our algorithm uses a location aware approach to find distance to sink node. It also makes use of busyness of nodes while selecting nodes to participate in route discovery mechanism. Also this scaling factor and busyness threshold can be made fixed for each node in the network depending on size and characteristics of the network.

5 citations


Cited by
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Journal ArticleDOI

[...]

08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

01 Jun 2012
TL;DR: SPAdes as mentioned in this paper is a new assembler for both single-cell and standard (multicell) assembly, and demonstrate that it improves on the recently released E+V-SC assembler and on popular assemblers Velvet and SoapDeNovo (for multicell data).
Abstract: The lion's share of bacteria in various environments cannot be cloned in the laboratory and thus cannot be sequenced using existing technologies. A major goal of single-cell genomics is to complement gene-centric metagenomic data with whole-genome assemblies of uncultivated organisms. Assembly of single-cell data is challenging because of highly non-uniform read coverage as well as elevated levels of sequencing errors and chimeric reads. We describe SPAdes, a new assembler for both single-cell and standard (multicell) assembly, and demonstrate that it improves on the recently released E+V-SC assembler (specialized for single-cell data) and on popular assemblers Velvet and SoapDeNovo (for multicell data). SPAdes generates single-cell assemblies, providing information about genomes of uncultivatable bacteria that vastly exceeds what may be obtained via traditional metagenomics studies. SPAdes is available online ( http://bioinf.spbau.ru/spades ). It is distributed as open source software.

10,124 citations

Journal ArticleDOI

7,335 citations

Journal ArticleDOI

6,278 citations