Last date of Paper submission 25th March 2k19
for More Info or Query Cont. us: 07405046536
Email us: ijirst.journal@gmail.com
Submit your Paper @ http://www.IJIRST.org
International Journal for Innovative Research in Science and Technology (IJIRST) is a one of the popular international multidisciplinary, open access, peer-reviewed, fully refereed journal. It is an international journal that aims to contribute to the constant innovative research and training, so as to promote research in the field of science and technology.
Showing posts with label Call for paper. Show all posts
Showing posts with label Call for paper. Show all posts
Friday, March 1, 2019
Wednesday, January 30, 2019
IJIRST - Submit Paper | Call for Paper - February 2019
IJIRST - International Journal for Innovative Research in Science and Technology
Call for Papers | Vol. 5 Issue 9 - February 2019
Last date of Paper submission 25th Feb '19
NCNICS'19 National Conference: 07/03/2019
for More Info or Query Cont. us: 07405046536
Email us: ijirst.journal@gmail.com
Submit your Paper @ http://www.IJIRST.org
Wednesday, November 21, 2018
Monday, January 1, 2018
IJIRST Invitation Call for Paper - January 2k18
International Journal for Innovative Research in Science and Technology - IJIRST
Call for Paper - January #2k18
High Impact Factor: 4.371 | IC Value: 71.12 (New)Submit your Paper @ IJIRST.org
Friday, December 22, 2017
IJIRST - Submit Paper Invitation
Call For Paper - IJIRST | Vol 4 Issue 7 - December 2017
High Impact Factor: 4.371 | IC Value: 71.12 (New)
Last Date of Paper Submission: 25 Dec 2017
Submit your Paper @ IJIRST.org
Saturday, March 26, 2016
Monday, December 7, 2015
A Time Domain Reference-Algorithm for Shunt Active Power Filters
Abstract:- The aim of this paper
is to identify an optimum control strategy of three-phase shunt active filters
to minimize the total harmonic distortion factor of the supply current Power
Quality (PQ) is an important measure of an electrical power system. The term PQ
means to maintain purely sinusoidal current wave form in phase with a purely
sinusoidal voltage wave form. The power generated at the generating station is
purely sinusoidal in nature. The deteriorating quality of electric power is
mainly because of current and voltage harmonics due to wide spread application
of static power electronics converters, zero and negative sequence components
originated by the use of single phase and unbalanced loads, reactive power,
voltage sag, voltage swell, flicker, voltage interruption etc. The simulation
and the experimental results of the shunt active filter, along with the
estimated value of reduction in rating, show that the shunt filtering system is
quite effective in compensating for the harmonics and reactive power, in
addition to being cost-effective.
Keywords: Shunt voltage inverter APF, Time domain,
instantaneous active power, carrier based PWM, Control strategy etc.
I. Introduction
The wide use of power devices (based on
semi-conductor switches) in power electronic appliances (diode and thyristor
rectifiers, electronic starters, UPS and HVDC systems, arc furnaces, etc…)
induces the appearance of the dangerous phenomenon of harmonic currents flow in
the electrical feeder networks, producing distortions in the current/voltage
waveforms. As a result, harmful consequences occur: equipment overheating,
malfunction of solid-state material, interferences with telecommunication
systems, etc... Damping harmonics devices must be investigated when the
distortion rate exceeds the thresholds fixed by the ICE 61000 and IEEE 519
standards. For a long time, tuned LC and high pass shunt passive filters were
adopted as a viable harmonics cancellation solution.
II. Shunt active filtering algorithms
The control algorithm used to generate the
reference compensation signals for the active power filter determines its
effectiveness. The control scheme derives the compensation signals using
voltage and/or current signals sensed from the system. The control algorithm
may be based on frequency domain techniques or time domain techniques. In
frequency domain, the compensation signals are computed using Fourier analysis
of the input voltage/current signals. In time domain, the instantaneous values
of the compensation voltages/currents are derived from the sensed values of
input signals. There are a large number of control algorithms in time domain
such as the instantaneous PQ algorithm, synchronous detection algorithm, synchronous
reference frame algorithm and DC bus voltage algorithm. The instantaneous PQ
algorithm by Akagi is based on Park’s
transformation of input voltage and current signals from which instantaneous
active and reactive powers are calculated to arrive at the compensation
signals. This scheme is most widely used because of its fast dynamic response
but gives inaccurate results under distorted and asymmetrical source
conditions.
For More Information Click Here
Saturday, November 1, 2014
Know about it : Big Data is Transforming Sports #IJIRST
This article was originally published on The Conversation. The publication contributed this article to Live Science's Expert Voices: Op-Ed & Insights.
In sport we don’t just want to know who won. We now want to know how to replicate success and then improve on it. And to do this, we’re using data – and lots of it. The field of “big data” analytics has come to sport and athletics, with massive implications for sport as we know it.
The Women’s Tennis Association recently approved real-time data capture, which means that court-side coaches can now advise their players during a match on best shot placement or serve direction using little more than a smartphone or tablet. It could be argued that this detracts from a player using their instincts to make their own decisions. But it means that to tennis fans watching, it’s easier to understand what makes a good player great and why their opponent lost, while players have an even keener competitive edge.
International Journal for Innovative Research in Science and Technology (IJIRST) is a one of the popular international multidisciplinary, open access, peer-reviewed, fully refereed journal. It is an international journal that aims to contribute to the constant innovative research and training, so as to promote research in the field of science and technology.
Friday, October 31, 2014
New Camera Sensor Eliminates Need for Flash #IJIRST
No flash? No problem. A new imaging sensor could soon make it possible for photographers to take clear, sharp photos, even in dim lighting.
Created by a team of researchers at Nanyang Technological University (NTU) in Singapore, the new sensor is highly sensitive to both visible and infrared light, which means it could be used in everything from the family Nikon to surveillance and satellite cameras.
IJIRST - IMPACT FACTOR 1.638
The sensor, which is 1,000 times more sensitive to light than the imaging sensors of most of today's cameras, gets this high photoresponse from its innovative structure.
main article of this post : click here
Thursday, October 30, 2014
IMPACT FACTOR #IJIRST
International Journal for Innovative Research in Science and Technology (IJIRST)
IJIRST is a monthly international journal publishing the finest peer-reviewed research and review articles in all fields of Science and technology. IJIRSTfollows stringent guidelines to select the manuscripts on the basis of its originality, importance, timeliness, accessibility, grace and astonishing conclusions. IJIRST is also popular for rapid publication of accepted manuscripts.
IMPACT FACTOR – 1.638
Thursday, October 16, 2014
Innovation Redefined... #ijirst
Thermal Radar
Photograph by Ralph Smith
Michael Dortch was building video surveillance trailers for industrial parks in Colorado when his clients started asking for near-omniscient views of their properties. They wanted to see intruders in the dark from all angles, but such coverage required up to seven thermal infrared cameras and cost more than $100,000. So Dortch and a colleague spent four years developing a cheaper, more capable alternative. Their Thermal Radar system provides 360-degree infrared coverage that can spot people, fires, vehicles, and more.
main article : click here to view
The heart of the invention is a single, spinning thermal sensor. Onboard processors constantly stitch images together for a refreshing panoramic video feed, and intelligent software finds threats.
A finished unit will cost about $16,000—many times cheaper than any system that comes close—and should be ready for its debut later this year. The first and biggest market will be corporate security. But the forest service, the Utah Department of Transportation, and even the Pentagon, Dortch says, also have his invention on their radar. how it works
Tuesday, October 14, 2014
Evolution of extreme parasites explained by scientists
Extreme adaptations of species often cause such significant changes that their evolutionary history is difficult to reconstruct. Zoologists at the University of Basel in Switzerland have now discovered a new parasite species that represents the missing link between fungi and an extreme group of parasites. Researches are now able to understand for the first time the evolution of these parasites, causing disease in humans and animals. The study has been published in the latest issue of the scientific journal Proceedings of the National Academy of Sciences (PNAS).
Parasites use their hosts to simplify their own lives. In order to do so, they evolved features that are so extreme that it is often impossible to compare them to other species. The evolution of these extreme adaptations is often impossible to reconstruct. The research group lead by Prof. Dieter Ebert from the Department of Environmental Science at the University of Basel has now discovered the missing link that explains how this large group of extreme parasites, the microsporidia, has evolved. The team was supported in their efforts by scientists from Sweden and the U.S.
Between fungi and parasite
The team of zoologists lead by Prof. Dieter Ebert has been studying the evolution of microsporidia for years. When they discovered a new parasite in water fleas a couple of years ago, they classified this undescribed species as a microsporidium, mostly because it possessed the unique harpoon-like infection apparatus (the polar-tube), one of the hallmarks of microsporidia. The analysis of the entire genome had several surprises in store for them: The genome resembles more that of a fungi than a microsporidium and, in addition, also has a mitochondrial genome. The new species, now named Mitosporidium daphniae, thus represents the missing link between fungi and microsporidia.
Source:
The above story is based on materials provided by Universität Basel. Note: Materials may be edited for content and length.
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