14,791 research outputs found
Securing Internet Protocol (IP) Storage: A Case Study
Storage networking technology has enjoyed strong growth in recent years, but
security concerns and threats facing networked data have grown equally fast.
Today, there are many potential threats that are targeted at storage networks,
including data modification, destruction and theft, DoS attacks, malware,
hardware theft and unauthorized access, among others. In order for a Storage
Area Network (SAN) to be secure, each of these threats must be individually
addressed. In this paper, we present a comparative study by implementing
different security methods in IP Storage network.Comment: 10 Pages, IJNGN Journa
Self-tuning of threshold for a two-state system
A two-state system (TSS) under time-periodic perturbations (to be regarded as
input signals) is studied in connection with self-tuning (ST) of threshold and
stochastic resonance (SR). By ST, we observe the improvement of signal-to-noise
ratio (SNR) in a weak noise region. Analytic approach to a tuning equation
reveals that SNR improvement is possible also for a large noise region and this
is demonstrated by Monte Carlo simulations of hopping processes in a TSS. ST
and SR are discussed from a little more physical point of energy transfer
(dissipation) rate, which behaves in a similar way as SNR. Finally ST is
considered briefly for a double-well potential system (DWPS), which is closely
related to the TSS
An Experimental Investigation of Performance and Emission in Ethanol Fuelled Direct Injection Internal Combustion Engines with Zirconia Coating
This article presents the experimental investigation of use of neat ethanol (95% Ethanol +5% water) as a fuel in a four stroke single cylinder engine as regards to performance and emission characteristics. Two different ignition modes viz. (i) High Compression (16.5:1) Spark Ignition with high-pressure manifold injection of ethanol and (ii) Ultra High Compression (44.4:1) Compress Ignition with Direct Injection of ethanol have been experimentally analyzed with and without zirconia surface coating. As a benchmark, the results have been compared with data from the same engine run with diesel as fuel. In the first mode, the brake thermal efficiency with ethanol as fuel was found almost equal to that of diesel. However, the emissions were found to be significantly lower. In the second mode, the brake thermal efficiency was found to fall in between the diesel and ethanol manifold injection modes of operation. More significantly, the cost of running the engine was found to be lower than the operating cost incurred by using diesel. This assumes importance in the wake that ethanol can be obtained from non-fossil resources
Kriging models for aero-elastic simulations and reliability analysis of offshore wind turbine support structures
This PhD research is funded by Lloydâs Register Group Services Ltd., Aberdeen. Sriramulaâs work within the Lloydâs Register Foundation Centre for Safety and Reliability Engineering at the University of Aberdeen. The Foundation helps to protect life and property by supporting engineering-related education, public engagement and the application of research.Peer reviewedPostprin
Management of Gouty Arthritis with special reference to Vatarakta - A Case Report
Gouty Arthritis has now become a common disease condition which we deal in Ayurveda, but a proper treatment protocol is not followed in many cases. The case reported here was as a result of improper diet and lack of exercise which resulted in an increase serum uric acid level and joint inflammation. The treatment was given at IPD level diagnosing it as Gambhira Vatarakta with valid Chikitsa Siddhanta. This case report provides us guidelines that even a chronic gouty arthritis with a very high serum uric acid can be treated as per Vataraktha Chikitsa Siddhanta in Ayurveda
Improved Stack-Slide Searches for Gravitational-Wave Pulsars
We formulate and optimize a computational search strategy for detecting
gravitational waves from isolated, previously-unknown neutron stars (that is,
neutron stars with unknown sky positions, spin frequencies, and spin-down
parameters). It is well known that fully coherent searches over the relevant
parameter-space volumes are not computationally feasible, and so more
computationally efficient methods are called for. The first step in this
direction was taken by Brady & Creighton (2000), who proposed and optimized a
two-stage, stack-slide search algorithm. We generalize and otherwise improve
upon the Brady-Creighton scheme in several ways. Like Brady & Creighton, we
consider a stack-slide scheme, but here with an arbitrary number of
semi-coherent stages and with a coherent follow-up stage at the end. We find
that searches with three semi-coherent stages are significantly more efficient
than two-stage searches (requiring about 2-5 times less computational power for
the same sensitivity) and are only slightly less efficient than searches with
four or more stages. We calculate the signal-to-noise ratio required for
detection, as a function of computing power and neutron star spin-down-age,
using our optimized searches.Comment: 19 pages, 7 figures, RevTeX
Consumer Behavior in Selection of Buying Source of Siddha Medicine in Tamilnadu, India from the Perspective of Age
With the increasing usage of traditional medicines as complementary alternative therapy, possibilities that would ensure its successful integration into the public domain of health care services needs to be evaluated. India is one of the countries with rich traditional knowledge base. Its ethnic ethno-medical practices had paved way for the evolution of several indigenous systems of medicine. Siddha is one of the oldest systems of medicine in India. Siddha holds close association with nature and has been validated in the laboratory of life, even before the advent of formal modern western system of medicine. This paper discusses the interrelations between usage of Sidhha as complementary alternative medicine and its implications on public health care related issues. We explore the impact of age of respondents in the public domain as a criterion in relation to selection of buying source of Siddha medicine in Tamilnadu, India
Current Trends in Usage of Traditional System of Medicine in Tamilnadu, India - From the Perspective of Occupation
Socio-economic parameters have significant impact on consumerâs attitude towards the usage of traditional system of medicine in Tamilnadu, India. Though traditional systems of medicine have made significant contributions towards fulfilling healthcare needs of the people in the past, impacts of modern medicine have been so large that traditional medicine witnessed a dark period in India. While such practices are common in the rural/ remote areas, off late, change in the trend with respect to the usage of Siddha medicine as complementary alternative therapy among urban population has been observed. Present study aims to evaluate the resurgence of interest in Siddha medicine among the people working in different sectors (occupation) in Tamilnadu, India
Ultimate loads and response analysis of a monopile supported offshore wind turbine using fully coupled simulation
This PhD research is funded by Lloydâs Register Group Services Ltd., Aberdeen. Sriramulaâs work within the Lloydâs Register Foundation Centre for Safety and Reliability Engineering at the University of Aberdeen is supported by Lloydâs Register Foundation. The Foundation helps to protect life and property by supporting engineering-related education, public engagement and the application of research. We would also like to acknowledge the constant assistance provided by Jason Jonkman on using FAST.Peer reviewedPostprin
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