#Ravinder Dahiya

[infotoday24]

विश्व में युवा भारतीय पहलवानों की कड़ी परीक्षा, अंशु, सरिता से काफी उम्मीदें | अधिक खेल समाचार - टाइम्स ऑफ इंडिया

विश्व में युवा भारतीय पहलवानों की कड़ी परीक्षा, अंशु, सरिता से काफी उम्मीदें | अधिक खेल समाचार – टाइम्स ऑफ इंडिया

ओस्लो (नॉर्वे): भारतीय कुश्ती दल के युवा स्टार खिलाड़ियों की अनुपस्थिति में भी बड़े स्तर का अनुभव हासिल करना चाहेंगे। अंशु मलिकशनिवार से शुरू हो रही विश्व चैंपियनशिप में उनके प्रदर्शन पर खासी नजर रहेगी। बजरंग पुनिया जैसे सिद्ध कलाकार, Ravi Dahiyaविनेश फोगट और दीपक पुनिया सभी चोट या तैयारी की कमी के कारण टीम से गायब हैं। उनकी गैरमौजूदगी में जैसे युवाओं के लिए यह एक जबरदस्त मौका है Ravinder Dahiya…

[sonita0526]

गलत पहचान का मामला – नाडा ने डोपिंग के लिए गलत पहलवान को पेश किया नाडा ने कहा कि डोपिंग के लिए पकड़े गए पहलवान ने पिछले साल अंडर -23 विश्व चैंपियनशिप में रजत जीता था, लेकिन बाद में यह गलत धारणा बन गया क्योंकि उसने ऐसा पदक नहीं जीता है। एजेंसी [टी] कुश्ती [टी] रविंदर कुमार [टी] रविंदर दहिया [टी] डोपिंग [टी] वाडा [टी] वर्ल्ड एंटी डोपिंग एजेंसी Source link

[intelligentliving]

Engineers from the Scottish University of Glasgow have developed a technology that allows wearable devices, such as fitness trackers, to be powered by sweat rather than batteries. The innovative, flexible supercapacitor enables sweat to replace electrolytes found in conventional batteries. It only takes 20 microlitres of fluid to recharge fully...

[stevebattle]

Inchworm Magnetobot by Ravinder Dahiya, Prakash Karipoth, Adamos Christou, and Abhilash Pullanchiyodan (2021), University of Glasgow. This worm robot uses a novel proprioceptive sensor based on a graphite paste. The robot's skin is made from a stretchy plastic called Ecoflex, and small permanent magnets at each end of the body enable the worm to be moved using external magnets. As the worm body flexes, it senses how much it has stretched and this is used to control the external stimulus in closed-loop control system. "Proprioception is a vital characteristic of many forms of biological life, and scientists have long been inspired to try and develop engineered systems which mimic this ability," Professor Ravinder Dahiya.

[sciencenewsforstudents]

One route to greener electronics may involve working up a good sweat. Engineers are designing energy-storage systems powered by perspiration. One uses the salty moisture to charge a supercapacitor (SU-per-ka-PASS-ih-tor). The energy it stores can later be used to light an LED or run some type of electronics.

Explainer: How batteries and capacitors differ

Like a battery, a supercapacitor stores energy. Researchers described their new model May 11 in Advanced Materials. Such sweat-powered devices could pave the way to wearable tech that is both safer and more sustainable.

Today’s wearable electronics include gadgets strapped to the body, such as watches and fitness trackers. But engineers are also designing electronics that are part of clothing or stuck right onto the skin. “Many times they are made of materials that are not sustainable or eco-friendly,” says Ravinder Dahiya. He’s an electronics engineer at the University of Glasgow in Scotland.

Batteries power most wearable devices today. Those batteries often contain harmful chemicals, such as acids. When it’s time to dispose of batteries, their chemicals can harm the environment. For safer tech, “why not then use something which is [a] body fluid?” Dahiya asks.

Sweat serves as the electrolyte, or charge-carrying solution, for the new device. “That’s kind of a new way of using sweat,” observes Mallika Bariya. A materials scientist, she works at the University of California, Berkeley and did not take part in the new research. Electrolytes are an “important component of these supercapacitors or even batteries,” she notes. They’re needed for these devices to provide power.

People often think about sweat as gross or unwanted. But sweat is interesting, she argues. It can tell you about someone’s health. Also, its chemical makeup can vary depending on what part of the body makes it. This new work “really shows that sweat isn’t a … useless, icky fluid,” she says. “It’s something we should think about more.”

[fumpkins]

Solar-Powered Supercapacitors Could Create Flexible, Wearable Electronics

A development in energy storage technology could bring a brand-new generation of flexible electronic gadgets to life, consisting of solar-powered prosthetics for amputees.

In a brand-new paper released in the journal Advanced Science, a group of engineers from the University of Glasgow go over how they have actually utilized layers of graphene and polyurethane to create a flexible supercapacitor which can produce power from the sun and shop excess energy for later usage.

They show the efficiency of their brand-new product by powering a series of gadgets, consisting of a string of 84 power-hungry LEDs and the high-torque motors in a prosthetic hand, enabling it to understand a series of things.

The research study towards energy self-governing e-skin and wearables is the most recent advancement from the University of Glasgow’s Bendable Electronics and Noticing Technologies (BEST) research study group, led by Teacher Ravinder Dahiya.

The leading touch delicate layer established by the BEST group scientists is made from graphene, an extremely flexible, transparent ‘super-material’ type of carbon layers simply one atom thick.

Sunshine which travels through the leading layer of graphene is utilized to produce power through a layer of flexible solar batteries listed below. Any surplus power is kept in a newly-developed supercapacitor, made from a graphite-polyurethane composite.

The group worked to establish a ratio of graphite to polyurethane which offers a fairly big, electroactive area where power-generating chain reaction can happen, developing an energy-dense flexible supercapacitor which can be charged and released extremely rapidly.

Comparable supercapacitors established formerly have actually provided voltages of one volt or less, making single supercapacitors mainly inadequate for powering numerous electronic gadgets. The group’s brand-new supercapacitor can provide 2.5 volts, making it more matched for numerous typical applications.

In lab tests, the supercapacitor has actually been powered, released and powered once again 15,000 times without any substantial loss in its capability to save the power it produces.

Teacher Ravinder Dahiya, Teacher of Electronics and Nanoengineering at the University of Glasgow’s School of Engineering, who led this research study stated: “This is the most recent advancement in a string of successes we’ve had in developing flexible, graphene based gadgets which can powering themselves from sunshine.

“Our previous generation of flexible e-skin required around 20 nanowatts per square centimetre for its operation, which is so low that we were getting surplus energy even with the lowest-quality solar batteries on the marketplace.

“We were eager to see what we could do to catch that additional energy and shop it for usage at a later time, however we weren’t pleased with existing kinds of energy storages gadgets such as batteries to do the task, as they are typically heavy, non-flexible, susceptible to fuming, and slow to charge.

“Our brand-new flexible supercapacitor, which is made from low-cost products, takes us some range towards our supreme objective of developing completely self-dependent flexible, solar-powered gadgets which can save the power they produce.

“There’s huge potential for devices such as prosthetics, wearable health monitors, and electric vehicles which incorporate this technology, and we’re keen to continue refining and improving the breakthroughs we’ve made already in this field.”

The group’s paper, entitled ‘Graphene-Graphite Polyurethane Composites based High-Energy Density Flexible Supercapacitors’, is released in Advanced Science. The research study was moneyed by the Engineering and Physical Sciences Research Study Council (EPSRC).

New post published on: https://livescience.tech/2019/02/15/solar-powered-supercapacitors-could-create-flexible-wearable-electronics/

[innocentamit]

Eyes on Ravinder as the Junior World medal makes him his first

Eyes on Ravinder as the Junior World medal makes him his first

Ravinder Dahiya is India’s best prospect for a medal at the international competition. The young man is preparing for his first race in Oslo, Norway. Ravinder is competing for 61kg and looks set to return to Bajrang Punia who has won the Olympic bronze in 65kg. Ravinder entered international competition after winning medals at the junior worlds earlier this year. He will be one of the darkest…

[solarpunk-aesthetic]

Solar Skin for Prosthetic Limbs

Ravinder Dahiya, an Indian scientist working at the University of Glasgow, is developing skin for prosthetic limbs which will power them using solar energy.

The work began as a way of creating graphene-based artificial skin to be sensitive to touch. It worked brilliantly, but needed a power source. The latest version integrates photovoltaic cells into the skin itself. Currently, Dahiya’s artificial skin operates on just 20 nW per square centimetre, and generates up to 15 times as much energy as it needs, though there currently isn’t any way to store the excess energy.

This solar skin will help amputees regain the ability to feel both contact pressure and temperature in their limbs. Ultimately, Dahiya aims to use the solar skin to power the electric motors in prosthetic limbs too.

As well as helping human amputees, the technology may have applications in robotics!

[x x]

[stevebattle]

Earthworm Magnetobot by Ravinder Dahiya, Prakash Karipoth, Adamos Christou, and Abhilash Pullanchiyodan (2021), University of Glasgow. Designed to demonstrate an ultra-stretchy strain sensor based on graphite paste, the Magnetobots are operated like puppets. Two permanent magnets mounted on linear actuators out of sight, move the head and tail of the robot. As the head moves forward the earthworm robot stretches and the sensor resistance increases. When the resistance reaches an upper threshold it stops and the magnet at the tail moves forward to catch up, shrinking it again. When the resistance reaches a lower threshold, the tail stops and the magnet at the head continues its advance, closing the feedback cycle.

[sciencenewsforstudents]

One route to greener electronics may involve working up a good sweat. Engineers are designing energy-storage systems powered by perspiration. One uses the salty moisture to charge a supercapacitor (SU-per-ka-PASS-ih-tor). The energy it stores can later be used to light an LED or run some type of electronics.

Explainer: How batteries and capacitors differ

Like a battery, a supercapacitor stores energy. Researchers described their new model May 11 in Advanced Materials. Such sweat-powered devices could pave the way to wearable tech that is both safer and more sustainable.

Today’s wearable electronics include gadgets strapped to the body, such as watches and fitness trackers. But engineers are also designing electronics that are part of clothing or stuck right onto the skin. “Many times they are made of materials that are not sustainable or eco-friendly,” says Ravinder Dahiya. He’s an electronics engineer at the University of Glasgow in Scotland.

Batteries power most wearable devices today. Those batteries often contain harmful chemicals, such as acids. When it’s time to dispose of batteries, their chemicals can harm the environment. For safer tech, “why not then use something which is [a] body fluid?” Dahiya asks.

Sweat serves as the electrolyte, or charge-carrying solution, for the new device. “That’s kind of a new way of using sweat,” observes Mallika Bariya. A materials scientist, she works at the University of California, Berkeley and did not take part in the new research. Electrolytes are an “important component of these supercapacitors or even batteries,” she notes. They’re needed for these devices to provide power.

People often think about sweat as gross or unwanted. But sweat is interesting, she argues. It can tell you about someone’s health. Also, its chemical makeup can vary depending on what part of the body makes it. This new work “really shows that sweat isn’t a … useless, icky fluid,” she says. “It’s something we should think about more.”

[liliannorman]

Working up a sweat may one day power up a device

One route to greener electronics may involve working up a good sweat. Engineers are designing energy-storage systems powered by perspiration. One uses the salty moisture to charge a supercapacitor (SU-per-ka-PASS-ih-tor). The energy it stores can later be used to light an LED or run some type of electronics.

Explainer: How batteries and capacitors differ

Like a battery, a supercapacitor stores energy. Researchers described their new model May 11 in Advanced Materials. Such sweat-powered devices could pave the way to wearable tech that is both safer and more sustainable.

Today’s wearable electronics include gadgets strapped to the body, such as watches and fitness trackers. But engineers are also designing electronics that are part of clothing or stuck right onto the skin. “Many times they are made of materials that are not sustainable or eco-friendly,” says Ravinder Dahiya. He’s an electronics engineer at the University of Glasgow in Scotland.

Batteries power most wearable devices today. Those batteries often contain harmful chemicals, such as acids. When it’s time to dispose of batteries, their chemicals can harm the environment. For safer tech, “why not then use something which is [a] body fluid?” Dahiya asks.

Sweat serves as the electrolyte, or charge-carrying solution, for the new device. “That’s kind of a new way of using sweat,” observes Mallika Bariya. A materials scientist, she works at the University of California, Berkeley and did not take part in the new research. Electrolytes are an “important component of these supercapacitors or even batteries,” she notes. They’re needed for these devices to provide power.

People often think about sweat as gross or unwanted. But sweat is interesting, she argues. It can tell you about someone’s health. Also, its chemical makeup can vary depending on what part of the body makes it. This new work “really shows that sweat isn’t a … useless, icky fluid,” she says. “It’s something we should think about more.”

Perspire for power

To make their device, the Glasgow team started with a piece of cloth. It was made of polyester and cellulose, a tough material that forms cell walls in plants. On each side of the fabric, the researchers dropped a solution containing an electrically conductive polymer. Polymers are long molecules made up of chemical units that repeat over and over. Once the solution dried, the polymer layers became electrodes. Those electrodes store an electric charge.

Explainer: What are polymers?

Now you need sweat, which the cloth absorbs from the skin. Sweat contains salts. Each molecule of salt contains a pair of ions, atoms with an electrical charge. One ion is positively charged, the other negatively charged. In the supercapacitor, those charges part ways. Positive ions move to one electrode and negative ions onto the other. These ions react with the polymer.

The supercapacitor, shown in these images, is made by placing a polymer on both sides of a fabric. That polymer, called PEDOT:PSS, can conduct electricity. Scientists demonstrated its flexibility by bending it over a curved surface, as in the second photo.Libu Manjakkal

If the electrodes are connected to a device (such as an LED light), the electric current produced by the reactions can flow out to power it. This will eventually deplete the capacitor’s charge. Recharging it takes more sweat.

Some of the researchers strapped a capacitor onto their shirts and ran. The device was able to generate enough power to light up a few LEDs. The capacitor also powered a sensor that measured the saltiness of that person’s sweat. The team also tested the device with artificial sweat that included water and salts. The device now generated about five times more power than it had with the natural moisture. That may be because there hadn’t been enough sweat on the runners’ shirts to fully wet the supercapacitor.

The device has worked for thousands of cycles of charging and discharging. It kept its performance even when twisted and bent. It fared less well after washing. Some of the polymer washed away, causing a drop in the capacitor’s performance.

Sweat is “one of the few available energy resources on skin,” notes Seokheun Choi. An electrical engineer, he works at Binghamton University in New York. Using sweat, he points out, lets people harness energy that usually goes to waste.

The power these devices produce is quite low. But they might get a boost by teaming up with other systems that harness sweat, Choi says. He’s part of a team working on one such a device, a type of fuel cell. It relies on sweat-eating microbes to make energy. Such an approach could make exciting and sustainable electronics powered by perspiration.

Working up a sweat may one day power up a device published first on https://triviaqaweb.tumblr.com/

[fumpkins]

Solar-Powered Supercapacitors Could Create Flexible, Wearable Electronics

A breakthrough in energy storage technology could bring a new generation of flexible electronic devices to life, including solar-powered prosthetics for amputees.

In a new paper published in the journal Advanced Science, a team of engineers from the University of Glasgow discuss how they have used layers of graphene and polyurethane to create a flexible supercapacitor which can generate power from the sun and store excess energy for later use.

They demonstrate the effectiveness of their new material by powering a series of devices, including a string of 84 power-hungry LEDs and the high-torque motors in a prosthetic hand, allowing it to grasp a series of objects.

The research towards energy autonomous e-skin and wearables is the latest development from the University of Glasgow’s Bendable Electronics and Sensing Technologies (BEST) research group, led by Professor Ravinder Dahiya.

The top touch sensitive layer developed by the BEST group researchers is made from graphene, a highly flexible, transparent ‘super-material’ form of carbon layers just one atom thick.

Sunlight which passes through the top layer of graphene is used to generate power via a layer of flexible photovoltaic cells below. Any surplus power is stored in a newly-developed supercapacitor, made from a graphite-polyurethane composite.

The team worked to develop a ratio of graphite to polyurethane which provides a relatively large, electroactive surface area where power-generating chemical reactions can take place, creating an energy-dense flexible supercapacitor which can be charged and discharged very quickly.

Similar supercapacitors developed previously have delivered voltages of one volt or less, making single supercapacitors largely unsuited for powering many electronic devices. The team’s new supercapacitor can deliver 2.5 volts, making it more suited for many common applications.

In laboratory tests, the supercapacitor has been powered, discharged and powered again 15,000 times with no significant loss in its ability to store the power it generates.

Professor Ravinder Dahiya, Professor of Electronics and Nanoengineering at the University of Glasgow’s School of Engineering, who led this research said: “This is the latest development in a string of successes we’ve had in creating flexible, graphene based devices which are capable of powering themselves from sunlight.

“Our previous generation of flexible e-skin needed around 20 nanowatts per square centimetre for its operation, which is so low that we were getting surplus energy even with the lowest-quality photovoltaic cells on the market.

“We were keen to see what we could do to capture that extra energy and store it for use at a later time, but we weren’t satisfied with current types of energy storages devices such as batteries to do the job, as they are often heavy, non-flexible, prone to getting hot, and slow to charge.

“Our new flexible supercapacitor, which is made from inexpensive materials, takes us some distance towards our ultimate goal of creating entirely self-sufficient flexible, solar-powered devices which can store the power they generate.

“There’s huge potential for devices such as prosthetics, wearable health monitors, and electric vehicles which incorporate this technology, and we’re keen to continue refining and improving the breakthroughs we’ve made already in this field.”

The team’s paper, titled ‘Graphene-Graphite Polyurethane Composites based High-Energy Density Flexible Supercapacitors’, is published in Advanced Science. The research was funded by the Engineering and Physical Sciences Research Council (EPSRC).

New post published on: https://www.livescience.tech/2019/02/15/solar-powered-supercapacitors-could-create-flexible-wearable-electronics/

[hell0-there-lady]

Researchers had already created an 'electronic skin' for prosthetic hands made with new super-material graphene. The new skin was much more sensitive to touch but needed a power source to operate its sensors. Previously this required a battery but the latest breakthrough has integrated photo-voltaic cells in to the skin. Dr Ravinder Dahiya, from the University of Glasgow School of Engineering, said: "The real challenge was 'how can we put skin on top of photo-voltaic and yet allow light to pass through the skin?' That's what we have done." The skin uses graphene, which is about one million times thinner than paper and is currently the world's strongest material. Its optical transparency allows about 98% of the light that strikes its surface to pass directly through it making it ideal for gathering energy from the sun to generate power. Dr Dahiya said: "Human skin is an incredibly complex system capable of detecting pressure, temperature and texture through an array of neural sensors which carry signals from the skin to the brain." He said the researchers had made significant steps in creating prosthetic prototypes with synthetic skin that were capable of making very sensitive pressure measurements. He said this meant prosthetic limbs could have a much a better sense of touch, temperature and texture. Dr Dahiya said: "When the skin is placed on a prosthetic hand and the amputee then touches an object they are able to feel the contact pressure as well as temperature." He said the addition of a solar power capability meant there would be no need for an external battery to power the skin's sensors. The doctor said: "It is a skin that can generate its own energy, the power needed to operate it. "This from prosthetic point of view leads to a skin that lets an amputee feel plus, without any additional battery, the prosthetic limb will be lighter." He said: "We are trying to bring the weight closer to the normal human hand. There is still a long way to go." The new skin requires just 20 nanowatts of power per square centimetre. Dr Dahiya said the skin had easily generated more power than it needed but it was currently not possible to store the energy. He said the team were already looking at ways to divert unused energy into batteries, allowing it to be used when required. Eventually, the doctor hopes to power the prosthetic limb's motors with the renewable energy as well - rather than just the skin. Dr Dahiya added: "The other next step for us is to further develop the power-generation technology which underpins this research and use it to power the motors which drive the prosthetic hand itself. "This could allow the creation of an entirely energy-autonomous prosthetic limb. "We've already made some encouraging progress in this direction and we're looking forward to presenting those results soon." The technology could also increase the functionality of robots, allowing them to have a better understanding of what they touch and interact with, according to Dr Dahiya. If robots had limbs that were sensitive to touch and pressure they would be less likely to make errors or injure humans, he said. The researchers hope to further develop the prototype in the next two years. The team's paper, Energy Autonomous Flexible and Transparent Tactile Skin, is published in Advanced Functional Materials. http://www.bbc.com/news/uk-scotland-39353751

[solarpunk-aesthetic]

Does solarpunk negate or conflict with the ideals of cyberpunk or transhumanism?

An interesting question, which I think has two distinct sides to it.

As genres, solarpunk and cyberpunk are certainly in contrast in many ways, but they do still share some central themes. One interesing core concept is the notion that human nature will tend to stay the same. The difference lies in the interpretation of that. I wrote about this before, so I apologise if I repeat myself at all.

Cyberpunk takes the cynical view that human nature is dominated by things such as greed and exploitation and that these are the immutable part of humanity. Consequently, dark and dystopian themes showing humanity’s dark side are heavy in cyberpunk literature. The original Blade Runner movie or any of the Ghost in the Shell animes illustrate this pretty well.

Solarpunk, on the other hand, takes the view that the central unchanging parts of humanity are positive traits like cooperation and coexistence. This actually seems more reasonable for a species like humans who evolved to live in societies because sharing and helping improves survival chances for everyone. Solarpunk fiction, then, would focus on more optimistic visions with a more eutopian (but not utopian) flavour.

In the meantime, one notable way in which the two genres differ is in their approach to the natural world. Cyberpunk settings are typically highly developed, urban, and full of neon lighting. Solarpunk settings, on the other hand, would emphasise nature, through an abundance of plants or natural sunlight, while not necessarily being any less developed or urban. In a sense, solarpunk could be seen as a subversion of cyberpunk, where technology and nature aren’t seen as being mutually exclusive.

This ties into transhumanism somewhat. In my view, as a fusion of natural humanity and technology, this fits well inside both genres. Transhumanism is a mainstay of cyberpunk, where characters like Motoko Kusanagi are pretty much archetypes of transhumanism. But both genres share a love for/fascination with technology and science.

For a real world example, consider Ravinder Dahiya, a scientist with a vision for using solar powered prosthetics to improve the lives of amputees. This is a good illustration of an idea which is simultaneously transhumanist and solarpunk.

Hmmm… That ended up being quite in-depth. Partly because I’m currently planning out a book for NaNoWriMo, which contrasts solarpunk with cyberpunk and explores a few ideas about transhumanism.

So your question was nicely timed. Thanks for making me think about it! ☀️