Here in this article we are proving the Mothers day quotes or Mothers Day sayings. Mother is a personality in the world which is never hated by his children, after all she did for their children she deserves the best which a person could give. Famous personalities around the worlds said golden words about Mothers and Mothers day. The famous Mothers day quotes, Mothers Day sayings and Mothers day proverbs are given below:
The Super most example of love in My life.
‘When apples were 4 & we were 5,
then my mother said,
‘I dont like Apples.’ (Bu Ali Sina)
Being a full-time mother is
one of the highest salaried jobs…
since the payment is pure love. (Mildred B. Vermont)
The sweetest sounds to mortals given, Are heard in Mother, Home, and Heaven.William Goldsmith Brown
‘The heart of a mother is a deep abyss at the bottom of which you will always find forgiveness. Honore de Balzac
Hundreds of dewdrops to greet the dawn,
Hundreds of bees in the purple clover,
Hundreds of butterflies on the lawn,
But only one mother the wide world over. George Cooper
A mother is a mother still, the holiest thing alive. Samuel Taylor Coleridge
I remember my mother’s prayers and they have always followed me. They have clung to me all my life. Abraham Lincoln
A man loves his sweetheart the most, his wife the best, but his mother the longest. Irish Proverb
Before I got married I had six theories about bringing up children; now I have six children, and no theories. John Wilmot
Biology is the least of what makes someone a mother. Oprah Winfrey
Mothers are fonder than fathers of their children because they are more certain they are their own. Aristotle
Let France have good mothers, and she will have good sons. Napoleon Bonaparte
All that I am or ever hope to be, I owe to my angel Mother. Abraham Lincoln
My mother was the most beautiful woman I ever saw. All I am I owe to my mother. I attribute all my success in life to the moral, intellectual and physical education I received from her. George Washington
That best academy, a mother’s knee. James Russell Lowell
“A mother understands what a child does not say.” Jewish proverb
‘A mighty power and stronger Man from his throne has hurled,For the hand that rocks the cradle Is the hand that rules the world.’ William Ross Wallace
Mothers are the most precious and expensive gift of GOD to humans. There is no substitute of mother in this world. No matter how, does anyone care or love you so much, you will always miss your mother. Mother’s lap is the place in this world where you forget all the worries and problems of your life and you will feel the ultimate rest and comfort there. Mother is the only creature in this world who loves her children without any greed.
She is a wonderful blessing. She spent her whole life making life of her children. She wanted to make her children the most successful and great person in this world and in this effort she never misses a thing. A person cannot payback the efforts of his mother, but he should not miss any opportunity to serve her mother and make her happy.
Every year 2nd Sunday of May is celebrated as the Mother’s day in most countries of the world. Some other countries celebrate the mothers day on other dates of February, March, April, May, June and August This year Mother’s Day 2012 will be celebrated on 13th May 2012 in most parts of the world.
We should celebrate this day that this day becomes very special for our sacrificing mother and make our mothers feel special. We also make an effort to give people ideas about how to celebrate the Mother’s day. On the link given below you can see Mother’s day celebration ideas or How to Celebrate Mother’s day.
We can give her gifts and greetings but gift should be such that it makes your mother happy and feel special. Many great peoples wrote many quotes about the greatness of Mothers and Mother’s day. This concern shows the importance of Mother’s day in our life. We also arrange some quotes about Mother and Mother’s day for you to write these on the greeting cards and send text messages on cellphones. Some of the great and lovely quotes and sms about the Mother’s Day and Mothers are given below in the link.
Peoples also send sms or text messages to their friends, relative and loved one. You can also find a huge collection of Mother’s day sms and text messages in the link given below:
Greeting card are the best way to express the wishes on any occasion and so did on Mother’s day. The great words of wishes can express the true love and care for your mother. The best Mother’s day wishes and greetings are given below in the link:
Illustration of Dr. Ville Kaajakari's shoe power generator. (Credit: Image courtesy of Louisiana Tech University)
Dr. Ville Kaajakari, assistant professor of electrical engineering at Louisiana Tech University has developed a technology that harvests power from a small generator embedded in the sole of a shoe.
Kaajakari’s innovative technology, developed at Louisiana Tech’s Institute for Micromanufacturing (IfM), is based on new voltage regulation circuits that efficiently convert a piezoelectric charge into usable voltage for charging batteries or for directly powering electronics.
“This technology could benefit, for example, hikers that need emergency location devices or beacons,” said Kaajakari. “For more general use, you can use it to power portable devices without wasteful batteries.”
The technology is being featured by MEMS Investor Journal, a national online industry publication. MEMS are tiny “smart” devices that combine computer chips with micro-components such as sensors, gears, flow-channels, mirrors and actuators.MEMS Investor Journal is an independent publication that provides investment professionals with the latest developments in the micro electro mechanical systems (MEMS) industry.
According to the article, energy harvesting is an attractive way to power MEMS sensors and locator devices such as GPS. However, power harvesting technologies often fall short in terms of output as many of today’s applications require higher power levels.
Kaajakari’s breakthrough uses a low-cost polymer transducer that has metalized surfaces for electrical contact. Unlike conventional ceramic transducers, the polymer-based generator is soft and robust, matching the properties of regular shoe fillings. The transducer can therefore replace the regular heel shock absorber with no loss in user experience.
In addition to running sensors and inertial navigation, Kaajakari’s shoe power generator can also be used to power RF transponders and GPS receivers.
“Ultimately, we want to bring up the power levels up to a point where we could, in addition to sensors, charge or power other portable devices such as cell phones.”
Article: Microstructured piezoelectric shoe power generator outperforms batteries
Story Source:
The above story is reprinted from materials provided by Louisiana Tech University. The original article was written by Dave Guerin.
In a just-published paper in the magazine Science, IBM researchers demonstrated a radio-frequency graphene transistor with the highest cut-off frequency achieved so far for any graphene device — 100 billion cycles/second (100 GigaHertz).
This accomplishment is a key milestone for the Carbon Electronics for RF Applications (CERA) program funded by DARPA, in an effort to develop next-generation communication devices.
The high frequency record was achieved using wafer-scale, epitaxially grown graphene using processing technology compatible to that used in advanced silicon device fabrication.
“A key advantage of graphene lies in the very high speeds in which electrons propagate, which is essential for achieving high-speed, high-performance next generation transistors,” said Dr. T.C. Chen, vice president, Science and Technology, IBM Research. “The breakthrough we are announcing demonstrates clearly that graphene can be utilized to produce high performance devices and integrated circuits.”
Graphene is a single atom-thick layer of carbon atoms bonded in a hexagonal honeycomb-like arrangement. This two-dimensional form of carbon has unique electrical, optical, mechanical and thermal properties and its technological applications are being explored intensely.
Uniform and high-quality graphene wafers were synthesized by thermal decomposition of a silicon carbide (SiC) substrate. The graphene transistor itself utilized a metal top-gate architecture and a novel gate insulator stack involving a polymer and a high dielectric constant oxide. The gate length was modest, 240 nanometers, leaving plenty of space for further optimization of its performance by scaling down the gate length.
It is noteworthy that the frequency performance of the graphene device already exceeds the cut-off frequency of state-of-the-art silicon transistors of the same gate length (~ 40 GigaHertz). Similar performance was obtained from devices based on graphene obtained from natural graphite, proving that high performance can be obtained from graphene of different origins. Previously, the team had demonstrated graphene transistors with a cut-off frequency of 26 GigaHertz using graphene flakes extracted from natural graphite.
Story Source:
The above story is reprinted from materials provided by IBM.
Close-up image shows a pair of entangled fibers that make up a microfiber nanogenerator. Both fibers are coated with zinc oxide nanowires; one fiber is additionally coated with gold. When rubbed together, they generate electrical current. (Credit: Georgia Tech Photo: Gary Meek)
Nanotechnology researchers are developing the perfect complement to the power tie: a “power shirt” able to generate electricity to power small electronic devices for soldiers in the field, hikers and others whose physical motion could be harnessed and converted to electrical energy.
The February 14 issue of the journal Nature details how pairs of textile fibers covered with zinc oxide nanowires can generate electrical current using the piezoelectric effect. Combining current flow from many fiber pairs woven into a shirt or jacket could allow the wearer’s body movement to power a range of portable electronic devices. The fibers could also be woven into curtains, tents or other structures to capture energy from wind motion, sound vibration or other mechanical energy.
“The fiber-based nanogenerator would be a simple and economical way to harvest energy from physical movement,” said Zhong Lin Wang, a Regents professor in the School of Materials Science and Engineering at the Georgia Institute of Technology. “If we can combine many of these fibers in double or triple layers in clothing, we could provide a flexible, foldable and wearable power source that, for example, would allow people to generate their own electrical current while walking.”
The microfiber-nanowire hybrid system builds on the nanowire nanogenerator that Wang’s research team announced in April 2007. That system generates current from arrays of vertically-aligned zinc oxide (ZnO) nanowires that flex beneath an electrode containing conductive platinum tips. The nanowire nanogenerator was designed to harness energy from environmental sources such as ultrasonic waves, mechanical vibrations or blood flow.
The nanogenerators developed by Wang’s research group take advantage of the unique coupled piezoelectric and semiconducting properties of zinc oxide nanostructures, which produce small electrical charges when they are flexed. After a year of development, the original nanogenerators — which are two by three millimeters square — can produce up to 800 nanoamperes and 20 millivolts.
The microfiber generators rely on the same principles, but are made from soft materials and designed to capture energy from low-frequency mechanical energy. They consist of DuPont Kevlar fibers on which zinc oxide nanowires have been grown radially and embedded in a polymer at their roots, creating what appear to be microscopic baby-bottle brushes with billions of bristles. One of the fibers in each pair is also coated with gold to serve as the electrode and to deflect the nanowire tips.
“The two fibers scrub together just like two bottle brushes with their bristles touching, and the piezoelectric-semiconductor process converts the mechanical motion into electrical energy,” Wang explained. “Many of these devices could be put together to produce higher power output.”
Wang and collaborators Xudong Wang and Yong Qin have made more than 200 of the fiber nanogenerators. Each is tested on an apparatus that uses a spring and wheel to move one fiber against the other. The fibers are rubbed together for up to 30 minutes to test their durability and power production.
So far, the researchers have measured current of about four nanoamperes and output voltage of about four millivolts from a nanogenerator that included two fibers that were each one centimeter long. With a much improved design, Wang estimates that a square meter of fabric made from the special fibers could theoretically generate as much as 80 milliwatts of power.
Fabrication of the microfiber nanogenerator begins with coating a 100-nanometer seed layer of zinc oxide onto the Kevlar using magnetron sputtering. The fibers are then immersed in a reactant solution for approximately 12 hours, which causes nanowires to grow from the seed layer at a temperature of 80 degrees Celsius. The growth produces uniform coverage of the fibers, with typical lengths of about 3.5 microns and several hundred nanometers between each fiber.
To help maintain the nanowires’ connection to the Kevlar, the researchers apply two layers of tetraethoxysilane (TEOS) to the fiber. “First we coat the fiber with the polymer, then with a zinc oxide layer,” Wang explained. “Then we grow the nanowires and re-infiltrate the fiber with the polymer. This helps to avoid scrubbing off the nanowires when the fibers rub together.”
Finally, the researchers apply a 300 nanometer layer of gold to some of the nanowire-covered Kevlar. The two different fibers are then paired up and entangled to ensure that a gold-coated fiber contacts a fiber covered only with zinc oxide nanowires. The gold fibers serve as a Shottky barrier with the zinc oxide, substituting for the platinum-tipped electrode used in the original nanogenerator.
To ensure that the current they measured was produced by the piezoelectric-semiconductor effect and not just static electricity, the researchers conducted several tests. They tried rubbing gold fibers together, and zinc oxide fibers together, neither of which produced current. They also reversed the polarity of the connections, which changed the output current and voltage.
By allowing nanowire growth to take place at temperatures as low as 80 degrees Celsius, the new fabrication technique would allow the nanostructures to be grown on virtually any shape or substrate.
As a next step, the researchers want to combine multiple fiber pairs to increase the current and voltage levels. They also plan to improve conductance of their fibers.
However, one significant challenge lies head for the power shirt — washing it. Zinc oxide is sensitive to moisture, so in real shirts or jackets, the nanowires would have to be protected from the effects of the washing machine, Wang noted.
The research was sponsored by the National Science Foundation, the U.S. Department of Energy and the Emory-Georgia Tech Nanotechnology Center for Personalized and Predictive Oncology.
Story Source:
The above story is reprinted from materials provided by Georgia Institute of Technology, via EurekAlert!, a service of AAAS.
— Nanotechnology researchers are developing the perfect complement to the power tie: a “power shirt” able to generate electricity to power small electronic devices for soldiers in the field, hikers and others whose physical motion could be harnessed and converted to electrical energy.
The February 14 issue of the journal Nature details how pairs of textile fibers covered with zinc oxide nanowires can generate electrical current using the piezoelectric effect. Combining current flow from many fiber pairs woven into a shirt or jacket could allow the wearer’s body movement to power a range of portable electronic devices. The fibers could also be woven into curtains, tents or other structures to capture energy from wind motion, sound vibration or other mechanical energy.
“The fiber-based nanogenerator would be a simple and economical way to harvest energy from physical movement,” said Zhong Lin Wang, a Regents professor in the School of Materials Science and Engineering at the Georgia Institute of Technology. “If we can combine many of these fibers in double or triple layers in clothing, we could provide a flexible, foldable and wearable power source that, for example, would allow people to generate their own electrical current while walking.”
The microfiber-nanowire hybrid system builds on the nanowire nanogenerator that Wang’s research team announced in April 2007. That system generates current from arrays of vertically-aligned zinc oxide (ZnO) nanowires that flex beneath an electrode containing conductive platinum tips. The nanowire nanogenerator was designed to harness energy from environmental sources such as ultrasonic waves, mechanical vibrations or blood flow.
The nanogenerators developed by Wang’s research group take advantage of the unique coupled piezoelectric and semiconducting properties of zinc oxide nanostructures, which produce small electrical charges when they are flexed. After a year of development, the original nanogenerators — which are two by three millimeters square — can produce up to 800 nanoamperes and 20 millivolts.
The microfiber generators rely on the same principles, but are made from soft materials and designed to capture energy from low-frequency mechanical energy. They consist of DuPont Kevlar fibers on which zinc oxide nanowires have been grown radially and embedded in a polymer at their roots, creating what appear to be microscopic baby-bottle brushes with billions of bristles. One of the fibers in each pair is also coated with gold to serve as the electrode and to deflect the nanowire tips.
“The two fibers scrub together just like two bottle brushes with their bristles touching, and the piezoelectric-semiconductor process converts the mechanical motion into electrical energy,” Wang explained. “Many of these devices could be put together to produce higher power output.”
Wang and collaborators Xudong Wang and Yong Qin have made more than 200 of the fiber nanogenerators. Each is tested on an apparatus that uses a spring and wheel to move one fiber against the other. The fibers are rubbed together for up to 30 minutes to test their durability and power production.
So far, the researchers have measured current of about four nanoamperes and output voltage of about four millivolts from a nanogenerator that included two fibers that were each one centimeter long. With a much improved design, Wang estimates that a square meter of fabric made from the special fibers could theoretically generate as much as 80 milliwatts of power.
Fabrication of the microfiber nanogenerator begins with coating a 100-nanometer seed layer of zinc oxide onto the Kevlar using magnetron sputtering. The fibers are then immersed in a reactant solution for approximately 12 hours, which causes nanowires to grow from the seed layer at a temperature of 80 degrees Celsius. The growth produces uniform coverage of the fibers, with typical lengths of about 3.5 microns and several hundred nanometers between each fiber.
To help maintain the nanowires’ connection to the Kevlar, the researchers apply two layers of tetraethoxysilane (TEOS) to the fiber. “First we coat the fiber with the polymer, then with a zinc oxide layer,” Wang explained. “Then we grow the nanowires and re-infiltrate the fiber with the polymer. This helps to avoid scrubbing off the nanowires when the fibers rub together.”
Finally, the researchers apply a 300 nanometer layer of gold to some of the nanowire-covered Kevlar. The two different fibers are then paired up and entangled to ensure that a gold-coated fiber contacts a fiber covered only with zinc oxide nanowires. The gold fibers serve as a Shottky barrier with the zinc oxide, substituting for the platinum-tipped electrode used in the original nanogenerator.
To ensure that the current they measured was produced by the piezoelectric-semiconductor effect and not just static electricity, the researchers conducted several tests. They tried rubbing gold fibers together, and zinc oxide fibers together, neither of which produced current. They also reversed the polarity of the connections, which changed the output current and voltage.
By allowing nanowire growth to take place at temperatures as low as 80 degrees Celsius, the new fabrication technique would allow the nanostructures to be grown on virtually any shape or substrate.
As a next step, the researchers want to combine multiple fiber pairs to increase the current and voltage levels. They also plan to improve conductance of their fibers.
However, one significant challenge lies head for the power shirt — washing it. Zinc oxide is sensitive to moisture, so in real shirts or jackets, the nanowires would have to be protected from the effects of the washing machine, Wang noted.
The research was sponsored by the National Science Foundation, the U.S. Department of Energy and the Emory-Georgia Tech Nanotechnology Center for Personalized and Predictive Oncology.
Microfluidic fuel cells could provide the necessary energy to provide continuous power to remote sensors, mobile phones and laptops, according to a University of Southampton student, who will graduate on July 17.
Microfluidics deals with the behavior, precise control and manipulation of fluids that are geometrically constrained to a small, typically sub-millimeter, scale.
As part of his final year project, Daniel Spencer, who has just completed an MEng in Electronic Engineering at the University’s School of Electronics and Computer Science, conducted a literature review to look at how energy harvesting devices or an energy store could be provided so that portable electronic devices could have continuous power on demand. His supervisor was Professor Hywel Morgan, Professor of Bioelectronics at ECS.
‘Currently, since energy harvesting cannot provide the necessary energy continuously, energy must be stored,’ Daniel said. ‘This is usually in the form of batteries which provide electricity on demand. However as portable devices become more powerful, higher capacity energy storage solutions are required.’
According to Daniel, microfluidic cells offer a solution to this problem, utilising the chemical bond energy stores in fuels with high calorific values such as methanol.
A fuel cell is capable of converting chemical energy from a fuel into electric energy. The simplest device, a polymer electrolyte membrane (PEM) fuel cell uses the electrochemical reaction of a fuel and oxidant to generate an electric current.
Daniel’s research has revealed that more work is needed for integration of fuel cells into a complete system and he plans to do a PhD in Microfluidics to develop his research further. In the meantime, Sharp Corporation is currently deploying a Direct Methanol Fuel Cell system, the timescale for which is unknown.
Story Source:
The above story is reprinted from materials provided by University of Southampton, via AlphaGalileo.
The Royal Swedish Academy of Sciences has awarded the Nobel Prize in Physics for 2010 to Andre Geim and Konstantin Novoselov, both of the University of Manchester, “for groundbreaking experiments regarding the two-dimensional material graphene.”
Graphene Eloboration
A thin flake of ordinary carbon, just one atom thick, lies behind this year’s Nobel Prize in Physics. Geim and Novoselov have shown that carbon in such a flat form has exceptional properties that originate from the remarkable world of quantum physics.
Graphene is a form of carbon. As a material it is completely new — not only the thinnest ever but also the strongest. As a conductor of electricity it performs as well as copper. As a conductor of heat it outperforms all other known materials. It is almost completely transparent, yet so dense that not even helium, the smallest gas atom, can pass through it. Carbon, the basis of all known life on earth, has surprised us once again.
Geim and Novoselov extracted the graphene from a piece of graphite such as is found in ordinary pencils. Using regular adhesive tape they managed to obtain a flake of carbon with a thickness of just one atom. This at a time when many believed it was impossible for such thin crystalline materials to be stable.
However, with graphene, physicists can now study a new class of two-dimensional materials with unique properties. Graphene makes experiments possible that give new twists to the phenomena in quantum physics. Also a vast variety of practical applications now appear possible including the creation of new materials and the manufacture of innovative electronics. Graphene transistors are predicted to be substantially faster than today’s silicon transistors and result in more efficient computers.
Since it is practically transparent and a good conductor, graphene is suitable for producing transparent touch screens, light panels, and maybe even solar cells.
When mixed into plastics, graphene can turn them into conductors of electricity while making them more heat resistant and mechanically robust. This resilience can be utilised in new super strong materials, which are also thin, elastic and lightweight. In the future, satellites, airplanes, and cars could be manufactured out of the new composite materials.
This year’s Laureates have been working together for a long time now. Konstantin Novoselov, 36, first worked with Andre Geim, 51, as a PhD-student in the Netherlands. He subsequently followed Geim to the United Kingdom. Both of them originally studied and began their careers as physicists in Russia. Now they are both professors at the University of Manchester.
Story Source:
The above story is reprinted from materials provided by Nobel Foundation.
