Citation: Mercedes to Produce a Fully Electric Gullwing (2009, August 7) retrieved 18 August 2019 from https://phys.org/news/2009-08-mercedes-fully-electric-gullwing.html 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 Raptor: An Electric Car Nearly Anyone Would Want to Drive Mercedes Gullwing. Image Source: Luxist.com. The specs on this car are tantalizing to luxury lovers: 526 horsepower, 649 pound-feet of torque, 0 to 60 in four seconds. Gas 2.0 reports on how the new electric Gullwing will be powered:”The motors will be fueled by a 400-volt liquid cooled, high-voltage lithium-ion battery pack delivering 40 Ah of current. The packs will run down the center of the chassis. They can be charged via an electrical outlet and also through regenerative braking.Since an electric version of the car was considered during its design, no modifications will be needed to the car’s lightweight aluminum frame. In fact, the electrical version is expected to perform on par with the petro-based SLS. Well, except it will be quieter than its V-8 sibling.”Clearly, becoming electric will not diminish the appeal of the Gullwing for those who like their cars fast and strong.As the move toward EVs becomes more fashionable, we are likely to continue to see high-end versions of luxury cars. (And of sports cars and muscle cars that are electric.) However, these automobile wonders do not address the problems inherent to using electricity: It’s still coming from polluting oil and coal sources in many cases. I may reduce my gasoline use with an EV, but I’m still using fossil fuels when I plug the car in to recharge. While the transition to hybrids and all-electric cars is a step in a direction that is more environmentally friendly, until we start using more clean technology to power our grid, the steps made will be small indeed.© 2009 PhysOrg.com (PhysOrg.com) — While it may be inherently wasteful to enjoy luxury cars, it can still be fun to look at — and even drive — them. And, if you are concerned about the environmental impact of such cars, you can breath a little easier. At least if your idea of luxury includes the Mercedes-Benz Gullwing. Mercedes-Benz recently confirmed that it will be producing an all-electric version of the SLS AMG Supercar.
Citation: ElcomSoft has discovered a security hole in UPEK fingerprint reader software (2012, September 6) retrieved 18 August 2019 from https://phys.org/news/2012-09-elcomsoft-hole-upek-fingerprint-reader.html Tired of Passwords? Replace Them With Your Fingerprint (Phys.org)—Russian security firm ElcomSoft has posted a blog entry, courtesy of Marketing Director Olga Koksharova, claiming that UPEK software that was preloaded on laptops and other computers to run hardware fingerprint readers, has a huge security hole in it. In the blog entry, Koksharova says her company has found that the UPEK code saves user passwords in the Windows registry in a “barely scrambled” form, and thus is obviously not encrypted, meaning those that gain physical access to the computer can very easily circumvent the fingerprint login process and gain access to all user files. Image credit: Wikimedia. © 2012 Phys.org UPEK software has been until recently, the leading supplier of preloaded software that connects to hardware to allow users to swipe their finger over a device to gain access to a locked computer rather than typing in a password. The idea is that it’s easier for users to swipe a finger then to remember and enter sometimes long and complicated passwords. And until now, swiping with a finger has been thought to be more secure than using a password because of the uniqueness of fingerprints and the sometimes simple passwords that people use.ElcomSoft is warning that all computers with UPEK software installed (and in use) are at risk, and users should take steps to have the password files removed and the software disabled. New laptops are not at risk as UPEK was purchased by another company and now different software (TrueSuite®) is preinstalled on computers that come with fingerprint reading software (which means most laptops). ElcomSoft says they tested a number of laptops and found they were able to break into every one of them with relative ease due to the security hole they’ve found. They note also that Windows itself never stores passwords in plaintext, with the exception of machines that don’t require a password for entry.Prior to 2010, UPEK software was preinstalled on virtually every well known brand of laptop; sixteen manufacturers in all. ElcomSoft says that Authentic, the company that bought UPEK, has been aware of the security breach for some time and wisely chose to change the software now preinstalled on laptops, but at the same time has failed to notify consumers, leaving millions at considerable risk. 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.
‘Cloaking’ device uses ordinary lenses to hide objects across continuous range of angles (a) The bifunctional cloak consists of an empty cavity (black) that scatters current and heat flow, along with an outer solid medium (orange) that concentrates current and heat flow. (b) Electric and thermal conductivities as a function of the inner:outer radius ratio of the cloaking shell. (c) A photograph of the cloak. Credit: Ma, et al. ©2014 American Physical Society Simulations of heat flux cloaking, one function of the multiphysics cloak. In (c), the heat-transfer measurement set-up involves hot and cold water tanks and an infrared camera to capture the temperature field through thermal radiation emission. Credit: Ma, et al. ©2014 American Physical Society Explore further Now in a new study, scientists have provided the first experimental demonstration of an invisibility cloak that can simultaneously manipulate two physical excitations: electric current and heat flux. The cloak is made of silicon and other materials, which opens up a range of new applications such as on-chip devices that involve both current and heat, as well as high-performance solar cells.The researchers, led by Professor Yungui Ma and Professor Sailing He at Zhejiang University in Hangzhou, China, have published a paper on the experimental demonstration of the multiphysics cloak in a recent issue of Physical Review Letters.”We think the greatest significance of our work is that it first unambiguously proves the practical feasibility to obtain a multi-functional cloaking performance using available materials and fabrication techniques, and that it may inspire much deeper and broader explorations along this exciting direction for different physical systems or in the pursuit of more complicated functionalities,” Ma told Phys.org.The general concept of an invisibility cloak is fairly simple: it is a material that bends light (or other excitation) around an object so that none of the light is scattered by the object, rendering it invisible. In practice, this concept is difficult to achieve because it requires very complicated materials, “metamaterials,” which are made of many tiny, precisely engineered elements that respond to the physical excitation in a very specific way. As the scientists explain in their paper, designing a metamaterial for even a single physical excitation—EM waves or heat flux, for instance—gets complicated very quickly: Journal information: Physical Review Letters More information: Yungui Ma, et al. “Experimentaql Demonstration of a Multiphysics Cloak: Manipulating Heat Flux and Electric Current Simultaneously.” Physical Review Letters. DOI: 10.1103/PhysRevLett.113.205501 © 2014 Phys.org Citation: Multiphysics invisibility cloak manipulates both electric current and heat (2014, November 21) retrieved 18 August 2019 from https://phys.org/news/2014-11-multiphysics-invisibility-cloak-electric-current.html “An EM cloak has to take into account both electric and magnetic polarizations, either of which has a maximum number of nine required dynamic elements, while a transient thermal cloak must deal with anisotropic thermal conductivities, thermal capacitance, and density simultaneously. Most of the previous work in this field struggled to satisfy the requirements of one set of physical equations that only controlled and realized one physical phenomenon.” Invisibility cloaks can make objects invisible not just to light in the visible part of the spectrum, but to many other physical excitations. These include acoustic waves, matter waves, heat flux, and infrared or ultraviolet electromagnetic (EM) waves. But so far, any single invisibility cloak can manipulate only one of these types of excitations. To design a bifunctional electric-thermal invisibility cloak, the scientists first had to show that it is possible to couple different equations into one, and then develop materials to experimentally realize this configuration. The resulting cloak design consists of a bilayer shell system. The inner layer, called the air cavity, is a strong scatterer that expels electric current or heat flow. The outer layer acts in opposition to the inner layer by attracting and concentrating the current and heat flow. The researchers made this layer out of silicon, a typical semiconductor material. In this case, they used a background made out of silicon with perforated holes filled with polydimethylsiloxane, which has a negligible conductivity compared to silicon. The researchers showed that an optimal combination of these structured materials can cancel out the disturbance caused by an object inside the air cavity, resulting in a cloaking effect.By integrating two functionalities in a single cloak, the results could have several applications. For example, the cloak could provide the ability to control the electric current and heat of electronic devices. It could also lead to the development of an electric-thermal “Janus” device that can concentrate electric current along one axis while cloaking thermal flux along the orthogonal axis.”Our current device, purely built on a silicon wafer employing a standard semiconductor fabrication technology, can manipulate both current and heat flows in a desired manner,” Ma explained. “Unwanted electric and thermal background disturbances are the two key noise sources that influence the performance (including lifetime) of microelectronic elements integrated in our daily-used electronic devices such as cell phone handsets or laptop computers. The current research may give a potential means to control these disturbances from the original design so that our devices can have a stronger performance on aspects of electric and heat management, which will become more and more important when their sizes keep shrinking and functionalities are getting more powerful.”The current design is aimed to protect an object both electrically and thermally. The design methodology can be modified to realize multiple functions, i.e., independently controlling electric and heat flows. One direct potential application is that it may help us have a device that can behave as an electric cloak (or shelter) and meanwhile as a thermal concentrator (harvester). In the end it may provide an efficient way to collect and utilize heat (thermal energy) unavoidably generated in all kinds of electronic devices.”Further, Ma explained, the ability to simultaneously control electric current and heat could be useful in thermophotovoltaic technology, the direct conversion of heat to electricity.”The independent controlling of electric and heat properties may also find very important applications in thermophotovoltaic technology (which has the largest solar-to-electricity transfer efficiency), which desperately requires a material with high electric conductivity but extremely low thermal conductivity,” he said. “A similar multiphysics device may be potentially built to meet this stringent requirement using current design methodology.”In the future, the researchers plan to continue working on bifunctional devices and their practical applications.”Other dual cloaks, such as electrical-magnetic hiding for low frequencies, is one of our current focuses,” Ma said. “In addition, we are working on dual functionalities (not for cloaking) by a single device, as mentioned above. Our goal is to find an efficient way to solve the fundamental problems on the undesired electrical-thermal entanglement, e.g., turning the dissipated heat into useful source energy.” 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.
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. Scientists produce microresonators with unprecedented precision The researchers, Giuseppe Calafiore, Alexander Koshelev, and coauthors at aBeam Technologies Inc., the University of California at Berkeley, and the Molecular Foundry at Lawrence Berkeley National Lab, have published a paper on the new nanoimprinting method in a recent issue of Nanotechnology.”The development of this new technology offers many advantages in terms of reproducibility, flexibility in the design of optical structures, as well as cost,” coauthor Keiko Munechika at aBeam Technologies told Phys.org. “Furthermore, this technology enables fabrication of complex optical structures comprised of material that has a high refractive index directly onto a fiber. This opens up a whole new range of fiber probes and devices, including optical tweezers and other immersion applications where other types of fiber lenses do not work.”Although there are many ways to integrate optical components with optical fibers, the bottleneck of this integration is the nanofabrication of 3-D optical components directly onto the ends of the fibers. The challenge is mainly the small surface area, since most fabrication techniques are designed for larger scales. Currently, fabrication of optical components on a fiber involves expensive and time-consuming techniques such as electron beam lithography or focused ion-beam milling, which has limited the development and widespread use of optical devices integrated on a fiber.The new method developed here uses ultraviolet nanoimprint lithography to print complex 3-D patterns on the end of an optical fiber. To demonstrate, the researchers fabricated a convoluted 3-D beam splitter that splits light into four beams of equal intensity upon exiting the fiber. Fabricating the beam splitter requires milling 255 different height levels on a 5 x 5 µm2 structure, demonstrating the high resolution and precision of the lithographic technique. As far as the researchers know, this is the highest lithographic accuracy achieved to date for imprinting complex 3-D features on the end of an optical fiber. The process can be used to imprint many other types of 3-D components that manipulate light in various ways, and do so at a high throughput and low cost. “There are many potential applications, ranging from bio sensors, and optical trapping to telecommunications,” Munechika said. “There are some conventional applications, in which bulky, expensive and difficult-to-align optics can be instead integrated on a fiber. One such example is a vortex phase mask that produces beams that carry angular momentum. It is used in STED (stimulated emission depletion) microscopy and telecommunications. Integrating it on a fiber simply makes it much easier to use and reduces cost at the same time. There are also more elaborate applications that open up new opportunities, rather than just improving existing devices. Examples include efficient near-field optical probes, fiber lenses for optical trapping, and different kinds of chemical sensors.”In the future, the researchers plan to develop technology to scale up the fabrication and work to commercialize the fiber probes. More information can be found at www.fiberphotonics.com. (a) Color version of the ion dose map, consisting of 255 different height levels, for designing the imprinted 3D structure. (b) Milled silicon mold used to make the structure. (c) Tilted-view of an optical fiber with an imprinted 3D structure. (d) Close-up image of the imprinted 3D structure. Credit: Calafiore, Koshelev, et al. ©2016 IOP Publishing More information: Giuseppe Calafiore, Alexander Koshelev, et al. “Nanoimprint of a 3-D structure on an optical fiber for light wavefront manipulation.” Nanotechnology. DOI: 10.1088/0957-4484/27/37/375301 © 2016 Phys.org Journal information: Nanotechnology Explore further (Phys.org)—Scientists have developed a method for imprinting tiny yet complex 3-D structures on the tip of an optical fiber, whose 125-µm diameter is roughly the thickness of a human hair. The 3-D optical structures can manipulate the light’s properties, such as its phase and wavefront, which enables a variety of integrated optics applications including laser machining, lab-on-a-fiber, and biomedical sensors. One of the biggest advantages of the new nanoimprinting method is that it is much less expensive than previous fabrication methods, opening the doors to more widespread use. Citation: Tiny 3-D structures nanoimprinted on the end of an optical fiber (2016, August 29) retrieved 18 August 2019 from https://phys.org/news/2016-08-tiny-d-nanoimprinted-optical-fiber.html
A folk dance and music performance by world famous ensemble from Hungary, the Csillagszemuek (Starry Eyed) is being organised by the Hungarian Information and Cultural Centre (HICC) in cooperation with the Indian Council for Cultural Relations (ICCR) in the Capital. This first international folk dance and music festival will be staged on 13 October at Kamani Auditorium.The Csillagszemuek (Starry-Eyed) Dance ensemble will be on their second tour to India and will be travelling and performing at various other cities in India like – Jaipur, Meerut, Saharanpur, Roorkee, and Dehradun. The group is engaged in dance education through various workshops, in which children learn their native folk dances. Sándor Timár, choreographer and his wife Böske Tjmár established the dance ensemble in 1993, which is considered to be unique in Hungary and Europe, and includes about 450 children. The Timár-method is used to train children and is well recognised in the world of folk dance. Also Read – ‘Playing Jojo was emotionally exhausting’The essence of this method is to introduce children and the young generation to the existing folk dance and music traditions of Hungary. This is done not only through stage or as a priceless value of Hungarian culture but, as a real experience to be built into the dancers’ lives. The 17-member Csillagszemuek is one of the world’s most prestigious Hungarian folk dance and music ensembles. The group regularly performs at the Hungarian dance performers’ star-gala in the opera house, and takes part in the excellent dance-art happenings and festivals. The Csillagszemuek represent Hungary all over the world and are called the Dance Ambassadors of Hungary.When: 13 October Where: Kamani Auditorium, Mandi House
Mobile messenger service WhatsApp’s user base in India has grown to 70 million active-users, which is over a 10th of its global users, its business head Neeraj Arora said on Sunday.‘We have 70 million active-users here who use the application at least once a month,’ Arora, a vice-president with WhatsApp, said at the fifth annual INK Conference here. He said the total user-base for the company, which was bought by Facebook in a blockbuster $19-billion deal earlier this year, is 600 million. Also Read – I-T issues 17-point checklist to trace unaccounted DeMO cashWith over a 10th of the users from the country, India is one of the biggest markets for WhatsApp, he said, adding connecting billions of people in markets like India and Brazil is the aim of the company.Arora, an alumnus of IIT-Delhi and ISB Hyderabad, said WhatsApp will continue to hold a distinct identity even after the takeover by Facebook and will not get merged with the social networking giant.He said WhatsApp, which has only 80 employees, will benefit through learnings from the social networking giant. Also Read – Lanka launches ambitious tourism programme to woo Indian touristsArora, who first heard of WhatsApp as a business development executive for the Internet search giant Google and later joined as its business head, said it took two years to stitch the $19 billion deal announced this April. Interestingly, Arora said he would have paid a fraction of the sum to buy WhatsApp three years back.It would have been in ‘low tens of million’ dollars, he said stressing that the company has grown a lot since then.Arora said the user-base has doubled to 600 million from the 30 million when he joined three years ago. The company has flourished because of its focus on the product, rather than the business side of things, he said. ‘The founders wanted to develop a cool product which will be used by millions and did not have business things like valuations,’ he said, stressing that this continues to be a motto of the company.
AERA, however, said the implementation of the proposal will be done once the Delhi International Airport Ltd (DIAL) submits fresh rate slabs for its approval.DIAL is a joint venture between the Airports Authority of India (AAI) and GMR group with 26 per cent and 74 per cent holding, respectively.“The Authority notes that DIAL has proposed an X factor of negative (-) 42.6 per cent in its revised submission… whereas the Authority has worked out an X factor of (+) 78.24 per cent. Accordingly, the Authority finds that the existing aeronautical tariffs at IGI Airport, Delhi, will need to be reduced by such an extent,” the paper said. Also Read – I-T issues 17-point checklist to trace unaccounted DeMO cashThe Authority shall pass an order in the matter only after considering the submissions of the stakeholders as per the provisions of the AERA Act, it said. The tariffs for Delhi Airport were last revised in 2012 when AERA allowed DIAL to hike charges by 346 per cent as against 775 per cent sought by the private operator.The proposal, when actually implemented, will come as a big relief to the flyers, who currently may have to shell out up to Rs 550 for domestic journeys and up to Rs 1,270 for international flights towards airport charges, which include landing and parking charges and a user-development fee. Also Read – Lanka launches ambitious tourism programme to woo Indian touristsThe International Air Transport Association (IATA) has often termed Indian airports as being the “most expensive” ones. Describing the reduction in charges as a “positive” move, IATA said it would be big relief to air travellers. “This is a positive development. AERA’s proposal of an X-factor of +78 per cent will translate into reduced charges at Delhi airport.“That will be a welcome relief for airport users who have been impacted by the over 340 per cent increase in airport charges since 2012,” IATA Regional Vice President for Asia Pacific, Conrad Clifford, said in a statement. He, meanwhile, said that IATA was still waiting for the tariffs for the second control period, which should have been determined 10 months back.
Hitting Indian shores this summer is the Corona Sunsets Music Events. Corona SunSets is a global music festival series inspired by the magic hour of the sunset. It is created to provide a festival experience that inspires people around the world to unplug, unite and celebrate the energy and spirit of the sunset.The sunset is a majestic spectacle of nature that shifts our mood and holds the promise of a new beginning. Corona is capturing this sensation and bottling it up for those who need it most. In its’ debut year in India, the festival will be a close knit dance music affair, bringing together a community of like-minded people seeking the same thing – an escape, a chance to unplug, a shared experience worth celebrating. Also Read – ‘Playing Jojo was emotionally exhausting’The festival brings electronic music innovators to multi-city festival travelling across Mumbai, Bengaluru, Pune, Chandigarh, Chennai, Kolkata, Goa and New Delhi. It will hit the Capital stage on May 10 at I Kandy, Gurgaon. Culminating at the magical hour of sunset, the festival unites music, food, art and entertainment, creating an authentic connection and emotional escape for people everywhere when they need it more than ever.For the Indian edition Corona has collaborated with Submerge, dance music promoters, in India. Also Read – Leslie doing new comedy special with NetflixShubhanshu Joshi, from Corona says, “We are extremely ambitious about Corona Sunsets, sharing the global brand experience with the Indian consumers. Since its introduction in 2001, Corona has evolved a great deal capturing both the heart and minds of the Indian consumers. With Sunsets we look forward to take our association and consumer experience to a whole new level. Claiming the sunset as our very own moment we invite you to step into the sunshine, a new music experience on the horizon.”
Film exhibition firm PVR Ltd on Friday said it will raise Rs 350 crore from Indian private equity firm Multiple Alternate Asset Management, which will pick up 10.7
Indian Test captain Virat Kohli’s woeful form continued as hosts India ‘A’ were shot out for a paltry 135 by Australia ‘A’ in the second unofficial ‘Test’ match, here on Wednesday.India A captain Cheteshwar Pujara opted for batting but it took Australia ‘A’ only 68.5 overs to bowl out the hosts as Kohli, on whom lay entire focus, struggled badly during his hour-long innings of 16 that came off 42 balls.In reply, Australia ‘A’ safely negotiated the final hour reaching 43 without loss in 13 overs with Cameron Bancroft (24 batting) and Usman Khawaja (13 batting) at the crease. Also Read – Khel Ratna for Deepa and Bajrang, Arjuna for JadejaFor Australia ‘A’, their whole bowling unit executed the plans perfectly. While paceman Gurinder Singh Sandhu (3/25) had the best figures but it was the left-arm spin twins Steve O’Keefe (2/30) and Ashton Agar (2/23) who dealt the telling blows at the top of the order.