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Search Results: 1 - 10 of 919 matches for " Ajit Shrivastava "
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A Study of Image Compression Based Transmission Algorithm Using Spiht for Low Bit Rate Application
Ritu Chourasiya,Ajit Shrivastava
Advanced Computing : an International Journal , 2012,
Abstract: Image compression is internationally recognized up to the minute tools for decrease the communicationbandwidth and save the transmitting power. It should reproduce a good quality image after compressedat low bit rates. Set partitioning in hierarchical trees (SPIHT) is wavelet based computationally very fastand among the best image compression based transmission algorithm that offers good compressionratios, fast execution time and good image quality. Precise Rate Control (PRC) is the distinctcharacteristic of SPIHT. Image compression-based on Precise Rate Control and fast coding time areprincipally analyzed in this paper. Experimental result shows that, in the case of low bit-rate, themodified algorithm with fast Coding Time and Precise Rate Control can reduce the execution time andimproves the quality of reconstructed image in both PSNR and perceptual when compare to at the samelow bit rate.
A Study of image compression based transmission algorithm Using SPIHT for low bit rate application
Ritu Chourasiya,Ajit Shrivastava
Buletin Teknik Elektro dan Informatika , 2013,
Abstract: Image compression is internationally recognized up to the minute tools for decrease the communication bandwidth and save the transmitting power. It should reproduce a good quality image after compression at low bit rates. Set partitioning in hierarchical trees (SPIHT) is wavelet based computationally very fast and among the best image compression based transmission algorithm that offers good compression ratios, fast execution time and good image quality. Precise Rate Control (PRC) is the distinct characteristic of SPIHT. Image compression-based on Precise Rate Control and fast coding time are principally analyzed in this paper. Experimental result shows that, in the case of low bit-rate, the modified algorithm with fast Coding Time and Precise Rate Control can reduce the execution time and improves the quality of reconstructed image in both PSNR and perceptual when compare to at the same low bit rate.
A Review of DDOS Attack and its Countermeasures in TCP Based Networks
Akash Mittal,Ajit Kumar Shrivastava,Manish Manoria
International Journal of Computer Science and Engineering Survey , 2011,
Abstract: Today, Internet is the primary medium for communication which is used by number of users across theNetwork. At the same time, its commercial nature is causing increase vulnerability to enhance cybercrimes and there has been an enormous increase in the number of DDOS (distributed denial of serviceattack) attacks on the internet over the past decade. Network resources such as network bandwidth, webservers and network switches are mostly the victims of DDoS attacks.In this paper basically summarizing different techniques of DDoS and its countermeasures by differentmethods such as Bloom Filter, Trace Back method, Independent Component Analysis and TCP FlowAnalysis.
Impact of Cloud Computing Platform Based on Several Software Engineering Paradigm
Ms. Monika Kherajani,Mr. Ajit Shrivastava
International Journal of Advanced Computer Research , 2011,
Abstract: A Cloud is a type of parallel and distributed system consisting of a collection of interconnected and virtualised computers that are dynamically provisioned and presented as one or more unified computing resources based on service-level agreements established through negotiation between the service provider and consumers. [UNI_MELB_08] Traditional business applications have always been very complicated and expensive. The amount and variety of hardware and software required to run them are daunting. We need a whole team of experts to install, configure, test, run, secure, and update them. When you multiply this effort across dozens or hundreds of apps, it’s easy to see why the biggest companies with the best IT departments aren’t getting the apps they need. Small and mid-sized businesses don’t stand a chance. In today’s era with cloud computing, you eliminate those headaches because you’re not managing hardware and software that’s the responsibility of an experienced vendor like salesforce.com. The shared infrastructure means it works like a utility: You only pay for what you need, upgrades are automatic, and scaling up or down is easy. In this paper we analyze several aspect and impact of software engineering parameter like design, modularity, testing etc.
OPTIMIZATION OF CHANNEL ALLOCATION ALGORITHM FOR HOT SPOT CELLS IN WIRELESS NETWORKS
Kriti Saraswat,Ajit Kumar Shrivastava,Amit Saxena
International Journal of Computers & Technology , 2012,
Abstract: Dense deployment of cellular networks is leading to scarcity of communication bandwidth or what we call as channel. If compared to its wired counterparts, wireless cellular network have limited number of channels available, which gives rise to problem of efficient channel allocation. Here, in this piece of work, the main objective is to put an effort to improve existing channel allocation scheme. In earlier existing hybrid allocation scheme, the base station notifies about the hot-spots to the Mobile Switching Centre (MSC) and if MSC has available channels in its central pool then it satisfies the request. Now, the novelty of this work starts where central pool gets exhausted and request of channels from base station (BS) still arrives and is served by returning the unused channels by different cells back to MSC on its request. The simulation of this approach is expounded and evaluated over OMNeT++ in a scenario with fixed channel allocation and hybrid approach by varying the proportion of dynamic channels to total number of channels available and the effectiveness is evaluated in terms of Call blocked and Call dropped versus System load.
Stakeholder’s Perspective of Clinical Decision Support System  [PDF]
Ajit Kumar
Open Journal of Business and Management (OJBM) , 2016, DOI: 10.4236/ojbm.2016.41005
Abstract: Clinical Decision Support System (CDSS) has potential opportunities to improve overall safety, quality and cost-effectiveness of healthcare. The CDSS has existed for more than four decades, but its adoption rate by medical communities is not encouraging even in the countries that have been a pioneer in developing them. At many sites, it was problematic, stalled in the planning stages or never even attempted. To date, CDSS is considered as a partially successful system. Several current challenges have not been adequately addressed during the development of CDSS. As per latest research, the lists of challenges are: improve the human-computer interface, disseminate best practices in CDSS design, development, and implementation, summarize patient-level information, prioritize and filter recommendations to the user, create an architecture for sharing executable CDSS modules and services, combine recommendations for patients with co-morbidities, prioritize CDSS content development and implementation, create Internet-accessible clinical decision support repositories, use free text information to drive clinical decision support, and mine huge clinical databases to create new CDSS. The preceding list has been considered as challenges due to unmet expectations of CDSS’s stakeholders, such as CDSS product development and maintenance team (product owner, project managers, system architect, system designers, system developers, system administrators, and system maintenance team), sales and marketing personnel, end-users. We found that most of the CDSS literature talked about the challenges and their details, but they do not throw enough light from CDSS stakeholders’ perspective while building and upon using CDSS. This paper describes CDSS from various stakeholders’ perspective, highlighting the challenges faced by them in owning, building, and using them.
Beam Dynamics and Electromagnetic Design Studies of 3 MeV RFQ for SNS Programme  [PDF]
Rahul Gaur, Purushottam Shrivastava
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.29068
Abstract: The physics design of a 3 MeV, 30 mA, 352.2 MHz Radio Frequency Quadrupole (RFQ) is done for the future Indian Spallation Neutron Source (ISNS) project at RRCAT, India. The beam dynamics design of RFQ and the error analysis of the input beam parameters are done by using standard beam dynamics code PARMTEQM. The electromagnetic stu-dies for the two-dimensional and three-dimensional cavity design are performed using computer codes SUPERFISH and CST Microwave Studio. The physics design of RFQ consisting of the beam dynamics design near the beam axis and the electromagnetic design for the RFQ resonator is described here.
Assessment of bone condition by acoustic emission technique: A review  [PDF]
Sharad Shrivastava, Ravi Prakash
Journal of Biomedical Science and Engineering (JBiSE) , 2009, DOI: 10.4236/jbise.2009.23025
Abstract: The paper deals with the review of acoustic emission technique in biomedical field. The re-view is done with the aim to provide an overview of the use of AE technique in biomedical field, mainly concentrated on the AE behavior of bone under different loading conditions, its depend-ence on strain rate, in osteoporosis, monitoring the fracture healing process of bone. The over-all conclusion from the review was that almost all the studies in bone indicated that the initial AE occurs only in the plastic region and just prior to yield. That means the use of AE tech-nique for clinical application cannot be consid-ered as a safe technique, but the early occur-rence of AE events from callus promises the application of AE technique for monitoring the fracture healing process. The negligible effect of soft tissues on AE response of bone prom-ises AE to become a non-invasive method for assessment of bone condition.
Coping up with the Information Overload in the Medical Profession  [PDF]
Ajit Kumar, Sanjeev Maskara
Journal of Biosciences and Medicines (JBM) , 2015, DOI: 10.4236/jbm.2015.311016
Abstract: The recent technological advancement has proved to be tremendously helpful for medical consultants. However, this advancement has also generated an enormous volume and variety of data, with a high velocity causing an information load for the medical consultants. Information overload can be defined as a difficulty a person can have in comprehending issue and making judgments that are caused by the presence of too much information. Information overload occurs when the amount of input to a system surpasses its processing capability. Decision-makers have a limited cognitive processing ability. Consequently, when information overload happens, it is possible that a decline in decision quality will take place. Decision-makers, such as medical consultants, have fairly limited cognitive processing capacity. Consequently, when information overload occurs, it is likely that a reduction in decision quality will occur. The aim of this study is to assess the impact of information overload on medical consultants’ life, its causes, and potential ways to deal with it. We performed a literature review to find the effects of information overload on medical consultants. Twelve research papers were considered for thematic analysis using NVivo 10 tool. These papers revealed four themes: 1) traditional methods of data collection; 2) modern ways of data collection; 3) consequences of modern ways of data collection; and 4) the need for handling information overload. This study suggests the development of a Continuing Professional Development course that explains how to deal with information overload, and availing the same through E-Learning mode might be one immediate solution.
India’s Advancement in Agriculture, Technology, and Management—What Next, and Why?  [PDF]
Ajit Kumar, Sanjeev Maskara
Open Journal of Business and Management (OJBM) , 2016, DOI: 10.4236/ojbm.2016.41001
Abstract: In the recent years, the economic stagnation of India has raised grave concern among Indian leaders. They have identified the causes and are taking remedial measures accordingly. However, we think, these curative actions would serve ad hoc, and the Indian government needs to take steps towards the sustainable growth. Many people in leadership have already pointed out that India needs to focus on innovation for its further growth. However, their argument often lacks the justification why innovation is an urgent need for India. India is often compared with China. Some people argue as China has focused on research, India should compete. The statement—other countries are investing in innovation so India should—is neither convincing nor helpful. Therefore, in this paper, we would illustrate the Solow Growth Model in the Indian context, which would provide some convincing insights that innovation is the next required measure for the sustainable growth of India.
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