August 2019

first_img“Imagine that going into your tablet!” The presenter at the Display Taiwan 2011 Technology Show recently was demonstrating a finger-length, thin USB flash drive of 16 gigabytes. She told visitors, however, that what was really interesting about this little number is that the drive could store up to two terabytes. Two terabytes? The idea has sparked much curiosity as to how this was achieved and how much such a device could cost. Manufacturers of the flash drive, Taiwan-based Transcend, developed the USB 3.0 flash drive in collaboration with Taiwan’s government-sponsored Industrial Technology Research Institute (ITRI), the R&D superstars who help Taiwan’s technology companies grow. Citation: Transcend says USB stick capable of 2 TB storage (2011, September 5) retrieved 18 August 2019 from © 2011 At the time of this writing, though, it was evident that technology observers could only imagine, as they were unable to satisfy their curiosity as to specs and technology approach. The Display Taiwan event, which focuses on flat-panel displays, was the key signal of the product, but there were no signs of price tag, specs or technical explanations.Called the “Thin Card,” the USB 3.0 device will not be available now because Transcend awaits the setting of the USB 3.0 standard. Transcend and partner ITRI will not be pushing the device forward until they get the 3.0 green light This is also, according to reports, the reason why there has been no promotional information other than the video. (USB 3.0 is the third generation of USB technology that acts as a connector between a host computer and peripheral device.)What is certain is that the video peek at a flash drive with a capability claim of 2 TB storage has raised awareness of Transcend as an aggressive player in memory products. With a company motto of “Good memories start here” the company has had a succession of product launches, selling flash memory cards, USB flash drives, MP3 players, digital photo frames, portable hard drives, among other items. At the time of its founding in 1988, the company offered two products only, a laser printer driver and a software protection system. The company introduced storage devices in 2003 and by 2009 it was recognized as a top Taiwanese global business. ITRI has an impressive record of helping companies innovate and of helping to create a high-tech environment for Taiwan, starting on its incubation missions in 1973, when the government decided to reduce dependence on labor-intensive industries and instead grow technology-intensive enterprise.center_img Fast Food USB Drive Thru: 1GB Pizza, Hamburger To Go, Please Explore further This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Stretchable graphene transistors overcome limitations of other materials

first_img This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Explore further (Left) Graphene-based transistor patterned on a PDMS substrate. (Center) Microscope images of the transistor undergoing stretching up to 5%. (Right) The transistor patterned on a balloon. Image credit: Lee, et al. ©2011 American Chemical Society ( — When it comes to fabricating stretchable, transparent electronics, finding a material to make transistors from has been a significant challenge for researchers. They’ve explored a variety of conventional semiconductor materials, including molecules, polymers, and metals, but these materials tend to have intrinsically poor optical and mechanical properties. These drawbacks make it difficult to realize a transistor that can maintain its optical and electrical performance under a high strain. In a new study, researchers have fabricated a stretchable, transparent graphene-based transistor and found that, due to graphene’s excellent optical, mechanical, and electrical properties, the transistor overcomes some of the problems faced by transistors made of conventional semiconductor materials. Citation: Stretchable graphene transistors overcome limitations of other materials (2011, October 26) retrieved 18 August 2019 from More information: Seoung-Ki Lee, et al. “Stretchable Graphene Transistors with Printed Dielectrics and Gate Electrodes.” Nano Letters ASAP, DOI:10.1021/nl202134z Engineers create polymer light-emitting devices that can be stretched like rubber Copyright 2011 All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of The researchers, led by Jeong Ho Cho from Soongsil University in Seoul, South Korea, and Jong-Hyun Ahn from Sungkyunkwan University in Suwon, South Korea, have published their study in a recent issue of Nano Letters. “Our work includes important results compared with stretchable and transparent devices reported in the previous literature,” Ahn told “In fact, it is nearly impossible to fabricate transistors that offer both mechanical stretchability and high optical transparency on unusual substrates such as rubber slabs or balloons by using conventional materials. In particular, graphene devices have the advantage that they can be integrated using printing processes at room temperature without vacuum or high-temperature steps. The capabilities of these systems go far beyond conventional material-based systems.”To fabricate the transistor, the researchers synthesized single layers of graphene and then stacked them layer by layer on copper foil. Using photolithography and etching techniques, the researchers patterned some of the transistor’s essential elements, including the electrodes and semiconducting channel, onto the graphene. After transferring these components onto a stretchable rubber substrate, the researchers printed the remaining components – gate insulators and gate electrodes – onto the device using stretchable ion gel. The researchers found that the graphene-based transistors on rubber substrates had several attractive features. For instance, the low-temperature printing processes made the fabrication technique much simpler than techniques that require high-temperature processes. Also, transistors made of conventional inorganic semiconducting materials cannot be fabricated on rubber substrates due to their poor mechanical properties, which limits their stretchable range. The researchers’ experimental results confirmed the graphene transistors’ good performance. They showed that the devices could be stretched up to 5% for 1,000 times and still maintain their good electrical properties. In one experiment, the researchers fabricated the graphene transistors on a rubber balloon and measured its electrical properties as they inflated the balloon. When stretched more than 5%, the electrical properties began to degrade, due partly to microcracks and other defects in the graphene films.“We will make an effort to improve the range of stretchability and the electronic properties of the current graphene devices and apply them to various wearable electronics and sensory skins,” Ahn said.The researchers predict that the graphene transistors could serve as a valuable component in future transparent and stretchable electronic applications, offering a performance that would be difficult to achieve using conventional electronic materials. Applications could include rollable displays, conformal biosensors that shape themselves on an underlying surface, and others.“Stretchable electronics could be useful for various current and future applications, such as wearable displays and communication devices, conformal and stretchable biosensors (brain sensors, balloon catheters, etc.), sensory skin for robotics, and structural health monitors and eye-ball cameras,” Ahn said. “Stretchable interconnects and devices would create foldable, rollable and wearable displays. Stretchable sensors could be embedded into gloves and clothing without bulkiness. Surgeon gloves could constantly monitor blood pH and other chemical levels.”last_img read more

Straintronic spin neuron may greatly improve neural computing

first_img Journal information: Nanotechnology A current-driven spin neuron, shown here, is based on magnets like the straintronic spin neuron. However, the current-driven spin neuron is less energy-efficient and dissipates orders of magnitude more heat than the voltage-driven straintronic spin neuron. Credit: Biswas, et al. ©2015 IOP Publishing The researchers, Ayan K. Biswas, Professor Jayasimha Atulasimha, and Professor Supriyo Bandyopadhyay at Virginia Commonwealth University in Richmond, have published a paper on the straintronic spin neuron in a recent issue of Nanotechnology.As the scientists explain, finding an effective way to mimic real neurons is essential for realizing the full potential of artificial neural networks, yet this task has proven difficult.”Most computers are digital in nature and process information using Boolean logic,” Bandyopadhyay told “However, there are certain computational tasks that are better suited for ‘neuromorphic computing,’ which is based on how the human brain perceives and processes information. This inspired the field of artificial neural networks, which made great progress in the last century but was ultimately stymied by a hardware impasse. The electronics used to implement artificial neurons and synapses employ transistors and operational amplifiers, which dissipate enormous amounts of energy in the form of heat and consume large amounts of space on a chip. These drawbacks make thermal management on the chip extremely difficult and neuromorphic computing less attractive than it should be. “Fortunately, there are other ways to implement neurons, such as with magnetic devices. It was thought that magnetic devices will dissipate much less heat, but what we found is that they do not necessarily dissipate less heat in all circumstances. The heat dissipation depends on how the magnetic devices are switched to mimic a neuron’s operation. If they are switched with current, which is the usual approach, then they do not dissipate that much less heat, and, in some circumstances, may even dissipate more heat than transistors. “However, there is a way to switch certain types of magnets with mechanical strain generated by an electrical voltage. We found that if magnets are switched with that approach, then the magnetic neurons are indeed much less dissipative than both their transistor-based counterparts and current-switched magnetic counterparts. This is the ‘straintronic spin neuron,’ and it may provide a boost to neuromorphic information processing hardware.” Citation: ‘Straintronic spin neuron’ may greatly improve neural computing (2015, July 8) retrieved 18 August 2019 from (—Researchers have proposed a new type of artificial neuron called a “straintronic spin neuron” that could serve as the basic unit of artificial neural networks—systems modeled on human brains that have the ability to compute, learn, and adapt. Compared to previous designs, the new artificial neuron is potentially orders of magnitude more energy-efficient, more robust against thermal degradation, and fires at a faster rate. More information: Ayan K. Biswas, et al. “The straintronic spin-neuron.” Nanotechnology. DOI: 10.1088/0957-4484/26/28/285201 Explore further “The extraordinary energy efficiency of the straintronic spin neuron is due to the fact that it takes very little voltage to switch the magnetization of a soft magnetostrictive nanomagnet elastically coupled to a piezoelectric film—a system known as a ‘two-phase multiferroic’—as long as the magnetostrictive nanomagnet is made of a special class of materials that have very high magnetostriction, such as Terfenol-D,” the researchers explained.In addition to being more energy-efficient, the straintronic spin neuron is also much more resilient to thermal noise than current-driven spin neurons. At temperatures above 0 K, thermal noise creates an additional random torque on the magnetization of any nanomagnet, which increases the probability that the neuron will either fire before reaching the threshold voltage or fail to fire after reaching the threshold voltage. This deleterious effect can be combatted by increasing the threshold current for firing (in the case of current-driven spin neurons) or the threshold voltage for firing (in the case of voltage-driven straintronic spin neurons), but this will also increase the energy dissipation. Here, the researchers showed that the tradeoff between energy efficiency and reliability favors the straintronic spin neuron overwhelmingly over current-driven spin neurons, which are estimated to dissipate several orders of magnitude more energy. With these advantages, straintronic spin neurons could have a variety of applications in neural computing.”What we have studied is a perceptron, which is a mathematical model of the artificial neuron,” Atulasimha said. “There are many possible applications of this in neural computing. One area we are interested in is spike-timing-dependent plasticity, which is a form of Hebbian learning. It is widely believed that it underlies learning and information storage in the brain, and there is a vast body of literature dealing with this. Straintronic spin neurons are fired by voltage impulses, and there are clear pathways to adapt them to the spike-timing-dependent plasticity model. We are also interested in character recognition, which employs feed-forward networks and image compression. That does not exclude anything else. Wherever heat dissipation is a spoiler, the straintronic spin neuron may be able to offer a solution.”The next steps for the researchers will involve fabricating the physical devices.”The proof of the pudding is always in the eating,” Biswas said. “Sooner or later, this device will have to be demonstrated experimentally. Our group has experimentally demonstrated switching of a magnet’s magnetization with strain in many different systems and we will strive to demonstrate the straintronic spin neuron in the future.” © 2015 This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Ultrafast heat conduction can manipulate nanoscale magnets The straintronic spin neuron is composed of magnets with mechanical strain generated by an electrical voltage. Because the magnets can be switched with very little voltage, the device has a very high energy efficiency. Credit: Biswas, et al. ©2015 IOP Publishing As the researchers explain, the proposed straintronic spin neuron is based on a magneto-tunneling junction, which is a tri-layered structure consisting of a hard nanomagnet, a spacer layer, and a soft magnetostrictive nanomagnet sitting on top of a piezoelectric film. Applying voltage pulses to the neuron generates a strain in the piezoelectric film, which is partially transferred to the soft magnetostrictive nanomagnet. When the strain in the nanomagnet exceeds a threshold value, the magnetization rotates abruptly, which changes the resistance of the magneto-tunneling junction between two stable states. The abrupt change in voltage across the device mimics neuron firing. last_img read more

Count on the contemporary

first_imgAll the art lovers across the Capital can head on for this art exhibition cum sale of curated fine arts, decors and jewelry being organised by The main aim of this show that is on till 17 August  is to appreciate the value of art and create awareness about the Indian contemporary paintings. The collection from Arrested By Art, a contemporary art boutique is a visually rich representation of our beautiful cultural heritage comprising of world famous iconography like peacocks, Maharajas and Maharanis.This collection has been designed to suit the requirements of today’s contemporary audiences starting at Rs 4,500. All art works are accompanied by Certificate of Authenticity mentioning the title and date of the artwork along with an acknowledgment of the artist. The collection includes not only Indian contemporary artworks but also abstract and modern contemporary artworks too.last_img read more

HC reserves order on plea on medical reimbursement of SC judges

first_imgDelhi High Court on Thursday reserved verdict on a plea moved by an RTI applicant challenging the single-judge order exempting medical reimbursements of Supreme Court judges from disclosure under the Right to Information Act.“Heard both the party. Order reserved,” said a bench of Chief Justice G Rohini and Justice Deepa Sharma, as it expressed the view that disclosure of medical reimbursement data would not serve any public interest. The petition has sought setting aside of the High Court’s December 19 last year’s order of a single judge who had held that disclosure of the medical reimbursements would not serve public interest and was thus exempt from the Act’s purview. Also Read – Company director arrested for swindling Rs 345 croreThe judge had held that the information sought was of a personal nature and the Central Information Commission’s (CIC) order was “erroneous”.The petitioner, Subhash Chandra Agarwal, contended that “salaries, pensions and allowances payable to or in respect of judges of Supreme Court are to be charged under Consolidated Fund of India”, as per the Constitution.“Therefore, source of reimbursement money of the medical bills of Supreme Court judges comes from the hard-earned money of citizens as taxpayers,” advocate Prashant Bhushan appearing for Agarwal, said. Also Read – Man who cheated 20 women on matrimonial websites arrestedSenior advocate Siddharth Luthra, appearing for Supreme Court registry, opposed Bhushan’s contention, saying the information sought is not in the public interest.Bhushan had contended that “information pertaining to expenditure of public money on public servants cannot be exempted from disclosure under RTI”.He said he had not sought information regarding the illness or medical treatment of the judges, but only the amount spent on the same.He also sought an order directing the Apex Court registry to comply with the CIC’s February 2012 order directing them to provide the information.last_img read more

KMC to clamp down tighter on night parking violators

first_imgKolkata: The Kolkata Municipal Corporation (KMC) has started charging huge fines to act tough against car owners who have fled away with their vehicles, even after the civic body officials had put clamps on them for illegal night parking. “In recent times, there have been a number of cases where we have found that car owners have fled away with vehicles even after we had clamped them. We have decided to fine these offenders double the price of such clamps,” a senior official of the Parking department of KMC said. Also Read – Heavy rain hits traffic, flightsApart from the usual fine of Rs 1,000 for illegal parking, the Parking department is imposing an additional fine of Rs 2,800 to 3,000, depending upon the price of the clamps that had been put on the vehicles.The Parking department had started its night parking drive with full vigour from the month of April this year, after they had put up billboards across the city, cautioning motorists against indiscriminately parking cars at night. On an average, in April the KMC had put more than 50 clamps every night for illegal parking. On certain days, the clamping reached even 80 vehicles and they were removed only after the vehicle owner/ driver shelled out Rs 1,000 each. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedIt may be mentioned that after the civic body had put up such billboards to apply for night parking stickers at Rs 450 per month, a number of car owners had come forward and around 250 such applications have come before the civic body till mid May. The number of applications from Ritchie Road and Lovelock Street alone have been around 100.”There were hardly 25 to 30 applications a month when the drive started for the first time in July 2017,” an official said.The KMC hands out stickers against payment of Rs 450 per month, which allows parking at designated lots between 10 pm and 7 am, preferably at a location near the residence of the car owners.last_img read more

Art galore Best of both worlds

first_imgThe famous saying by Leonardo da Vinci, “How painting surpasses all human works by reason of the subtle possibilities which it contains”, has been justified at famous artist Sakti Burman’s recent solo art show at Aakriti Art Gallery. Sakti Burman: works from 60s-80s, is not only an art show but is a delineation of artistic philosophy that is an assemblage that showcases the best of both worlds-east and the west from the foregone era. Although he settled permanently in Paris, he spent most of his time visiting all the art centres of Europe and natural art centres of India like Ajanta, Ellora, Sanchi, Khajuraho, Elephanta etc.  Also Read – ‘Playing Jojo was emotionally exhausting’This in turn inspired him to build up translucent joyous imageries of his paintings from the assimilation of the earthly forms, yet ethereal Italian Frescoes with the jubilant and enlightened classical ethos of Ajanta and the dream world of medieval miniatures. Along with being a painter, he is also a marveled sculptor with his works being mostly figurative  but the association of the figures defies the general norms and logic of reality. They create a world of dream defying the prevalent law of gravity. The reality is heightened towards an environment of surreal.  Also Read – Leslie doing new comedy special with NetflixHe paints mostly in three mediums: oil, water colour and pastel. His technique,   which represents  chromatic orchestration in his oils, is very jubilant and ecstatic even within a structural orientation. In the present show, barring four oils, most of the paintings about twenty in number are in water colour, executed between 1960 and 1980 . He transforms vacuity of the space into a divine light of the sky through treatment of his figurative forms with water colours. The second characteristic of his water colours is the use of texture,  which is also an essential feature of his oils but the transparency and subtlety of application of chromatic points bring out a different character in his water colors. The artistic identity that Sakti Burman created in the modernist field of post-1960s art is a kind of spirituality through a sensation of love for life. It not only limits oneself to mere art works but also exposes one to the historical-artistic contributions. This provides us with a deep insight into the cultural history of art forms of both worlds of the west and the east.last_img read more

Young drivers still using phones despite dangers

first_imgTeenagers do understand the dangers of using cellphones while driving —but they still use them, new research has found.Car crashes kill more teens each year than anything else, according to the US Centers for Disease Control and Prevention.“Teenagers think about what they do behind the wheel in very different ways than we think about teenagers behind the wheel,” said Marilyn Sommers, professor at University of Pennsylvania’s School of Nursing.For the study, the researchers got 30 teenagers engaged in conversations on distracted driving.“The definition of ‘texting while driving’ is not the same for everyone,” Catherine McDonald, assistant professor in the University of Pennsylvania’s School of Nursing, said. “For example, in their responses the teenagers would indicate that they did not text and drive, but then later would say something like, ‘At a red light, I’ll check my phone’,” McDonald noted.The interviewees made a distinction the interviewers had not. The study appeared in the journal Traffic Injury Prevention.last_img read more