Researchers discover way to create truecolor 3D holograms

first_img Explore further Holograms, of course, have been around for years, with the first images created in the 60’s. Back then the technique was to fire a laser at an object and then record the patterns of interference in the light waves onto a photo sensitive material. Later, rainbow type holograms (such as those used on credit cards) were, and still are, created by using a technique whereby white light is reflected off a silver backing through a plastic film that contains several different images of a single object. (PhysOrg.com) — Satoshi Kawata, Miyu Ozaki and their team of photonics physicists at Osaka University in Japan, have figured out a way to capture the original colors of an object in a still 3-D hologram by using plasmons (quantums of plasma oscillation) that are created when a silver sheathed material is bathed in simple white light. The discovery marks a new milestone in the development of true 3-D full color holograms. In their paper, published in Science magazine, the researchers show a rendered apple in all its natural red and green hues. Citation: Researchers discover way to create true-color 3-D holograms (2011, April 8) retrieved 18 August 2019 from https://phys.org/news/2011-04-true-color-d-holograms.html More information: “Surface-Plasmon Holography with White-Light Illumination,” by M. Ozaki et al., Science 8 April 2011: Vol. 332 no. 6026 pp. 218-220. DOI: 10.1126/science.1201045 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. ‘Smart’ holograms help patients help themselves © 2010 PhysOrg.com A view of a 3-dimensional green crane reconstructed by white-light illumination. Credit: Image © Science/AAAS Image (c) Science/AAAS The team at Osaka took another approach, they use both lasers and white light. They first fire a laser at an object, say an apple, to create an interference pattern, but instead of just one laser color, they actually use three; red, green and blue. The interference pattern is then captured on a light sensitive material which is coated with silver (because it contains electrons that are easily excited by white light) and silicon dioxide (to help steer the waves). They then shine a steady white light on the metal sheathed material exciting the free electrons, causing the creation of surface plasmons, which results in the regeneration of the captured image as a true-color 3-D hologram; one that can be viewed from almost any angle and is the same colors as the original object.Currently, the technique has only been shown to work on still images, and the results displayed on a very small surface area (about as big as a baseball card), but the results of research is nonetheless a very big step towards creating not just more realistic holograms, but true animated 3-D technology.last_img read more

ZTE scrambles to get at root of phone flaw

first_img Explore further China’s ZTE rejects Huawei patent charges As the world’s number-four handset vendor, ZTE Corp. and another Chinese equipment maker Huawei Technologies have been subjects of a controversy over whether their expanded presence in a U.S. market poses security risks from feared backdoors. Recently, a U.S. congressional panel singled out Huawei and ZTE in approving a measure designed to search and clear the U.S. nuclear-weapons complex of any technology produced by the two companies.ZTE issued ZTE Score M as an affordable Android phone, the ZTE Score M. with a 3.5-inch HVGA touchscreen, 600MHz CPU,3.2-megapixel camera, Wi-Fi, and microSD slot. Unfortunately, news surfaced that it also had the unwelcome feature of a root backdoor. The setuid-root binary, a program that runs with root privileges in /system/bin/sync_agent, provides the backdoor. Anyone who knows the hard-coded password gets root access to the phone.ZTE could have used the backdoor as a way for ZTE to update the phone’s software. Security experts say it is not clear whether ZTE is a victim of sloppy programming or whether this had worse intent.Dmitri Alperovitch, co-founder of cybersecurity firm, CrowdStrike and former Vice President of Threat Research at McAfee, noted that it is rare to find a vulnerability apparently inserted by the hardware manufacturer.There are conflicting reports over whether the hole affects other ZTE phones. ZTE confirmed the vulnerability on its Score phone but has denied that it affected other models as well. Nevertheless, some reports said ZTE Skate phones, sold by Orange in the UK, has the same backdoor. According to reports, security researchers are working to see if other ZTE devices suffer from the same security vulnerability.In Australia, ZTE, with offices in Sydney and Melbourne, supplies some Telstra phones. They are typically rebranded as T- and F-series mobile phones. Telstra, according to reports, knew about the backdoor news and was testing its devices, but preliminary tests looking for backdoor flaws suggested its handsets were not affected. The ZTE Score M (Phys.org) — Rattling phone security news surfaced this week for those owning ZTE Score M phones after an anonymous post to Pastebin.com reported a backdoor hole where others can gain control over a user’s device. The hole allows anyone with hardwired password to access the affected phone. ZTE has reacted in the affirmative, acknowledging the vulnerability in the Score phone and saying they’re working on a security patch, which it will issue soon. “We strongly urge affected users to download and install the patch as soon as it is rolled out to their devices.”center_img Citation: ZTE scrambles to get at root of phone flaw (2012, May 18) retrieved 18 August 2019 from https://phys.org/news/2012-05-zte-scrambles-root-flaw.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. © 2012 Phys.Orglast_img read more

Telecommunications expert suggests Earth may have dark matter disc

first_imgBen Harris, a telecommunications and GPS satellite expert with the University of Texas has made a surprising announcement during his presentation at this year’s gathering for the American Geophysical Union. He reported that using GPS data to calculate the mass of the Earth, gives a slightly bigger number than is accepted by the International Astronomical Union. The difference, he suggests, may be due to a disc of dark matter that exists over the equator. Explore further © 2014 Phys.org Citation: Telecommunications expert suggests Earth may have dark matter disc (2014, January 3) retrieved 18 August 2019 from https://phys.org/news/2014-01-telecommunications-expert-earth-dark-disc.html Physicists suggest possible existence of other kinds of dark matter Credit: NASA 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. Dark matter is of course the mysterious stuff that physicists have come to believe exists all throughout the universe. We can’t see it, but researchers have managed to sense its presence in a variety of ways (such as measuring its gravitational impact on stars, other planets, etc.). In so doing, most in the field have come to believe that it makes up approximately 80 percent of all matter. Unfortunately (mainly because it doesn’t appear to absorb or emit light or electromagnetic radiation) none of the studies done so far have been able to prove that dark matter truly exists—thus, the search goes on for some new kind of method to prove that dark matter isn’t just a theory, or alternatively, for some other explanation of what has been observed.Among other studies, back in 2009, it was noted that space probes passing by Earth experienced unexplainable slight changes in velocity, which some have attributed to them encountering dark matter. It could not be proven of course, but then there weren’t any other explanations for it either.In this new effort, Harris collected data from several satellite groups (European Galileo, U.S., GPS, GLONASS and Russian), which he then used to measure the mass of the Earth—a process which he describes as calculating by “feeling” the pull on each satellite. In so doing, he reports that his calculations were between 0.005 and 0.008 percent greater than that described by the IAU. The difference, he said, could be explained by a very large disc of dark matter over the equator.Harris’s theory doesn’t take into account changes in orbits of satellites that occur because of relativity, or the impact of gravity from the sun and moon, thus it’s still very preliminary. If other studies confirm what he’s found however, there exists the possibility that satellites could one day be used to not only prove the existence of dark matter, but to measure it in a very accurate way. More information: via New Scientistlast_img read more

Now hear this Simple fluid waveguide performs spectral analysis in a manner

first_img Remarkably, although van der Heijden intentionally eschewed the creation of a complex biophysical model, the waveguide nonetheless displays strong structural and behavioral similarities to the cochlea. That said, the paper acknowledges that the current model cannot describe the multiband dynamic range compression performed by the living cochlea, which would require automatic gain control or the ability to direct high-intensity waves into the nonpeaking mode. To that end, the paper also states that “refinement of optical coherence tomography techniques will undoubtedly deepen the knowledge of inner ear vibrations in unprecedented ways,” and that the study’s findings provide a “clear and straightforward theoretic framework that can guide the interpretation of such data.” Optical coherence tomography (OCT) is an optical signal acquisition and processing method that captures micrometer-resolution, three-dimensional cross-sectional images from within biological tissue and other optical scattering media in situ and in real time. OCT is analogous to ultrasound imaging, but employs light (typically near-infrared) rather than sound.Prof. van der Heijden discussed the paper that he published in Proceedings of the National Academy of Sciences with Phys.org, noting that he faced one major challenge in designing and fabricating the simplest possible fluid waveguide that exhibits steep deceleration and peaking: determining the precise physics behind the steep wave deceleration. “Consider the peaking by imagining a duct that, like a canal, mediates water waves – but with an important difference: the waves in this system first travel some distance and then suddenly grow in amplitude, peak, and decay rapidly – and even more interestingly, the location of the peak depends on the frequency of the wave,” van der Heijden tells Phys.org, with low-frequency waves travelling farther before they peak. This strange system exists: our own inner ears and those of other mammals host these peaking waves, and that is how they perform a spectral analysis of sound.” The challenge – and opportunity – is that scientists still don’t understand the underlying physics due primarily to a lack of data. There’s a good reason for this: The inner ear is not amenable to experiment, as it is inaccessible and vulnerable, with the vibrations in the nanometer range. (Phys.org) —Within the mammalian inner ear, or cochlea, a remarkable but and long-debated phenomenon occurs: As they move from the base of the cochlea to its apex, traveling fluid waves – that is, surface waves, in which (like waves on the sea and or in a canal) water moves both longitudinally and transversally – peak in amplitude at locations that depend on the wave’s frequency. (Higher frequencies are concentrated in the base, lower frequencies in the apex.) What’s critical is that these peaks allow us to identify and separate sounds. While cochlear frequency selectivity is typically explained by local resonances, this idea has two problems: resonance-based models require excessive intracochlear mass, and moreover cannot accurately represent the cochlea’s production of both phase and amplitude information. Recently, however, Prof. Marcel van der Heijden at Erasmus Medical Center, University Medical Center, Rotterdam, has rejected resonance, and in its place has designed and fabricated a novel neural data-inspired approach to producing these frequency-dependent amplitude peaks in the form of a disarmingly simple waveguide that, in a manner analogous to an optical prism, carries fluid waves and performs spectral analysis. By incorporating a longitudinal gradient, the waveguide – which consists of two parallel fluid-filled chambers connected by a narrow slit spanned by two coupled elastic beams – separates frequencies and decelerates energy transport through wave dispersion, thereby focusing the peak-creating energy. Its novelty derives from its spectral analysis functionality being based not on resonance, nor on standing waves or geometric periodicity, but on mode shape swapping – an abrupt exchange of shapes between propagating wave modes – making it a new physical effect based on well-known physics. Citation: Now hear this: Simple fluid waveguide performs spectral analysis in a manner similar to the cochlea (2014, September 29) retrieved 18 August 2019 from https://phys.org/news/2014-09-simple-fluid-waveguide-spectral-analysis.html “Current dogma in inner-ear mechanics states that the peaking is caused by a form of biological amplification that injects mechanical energy into the sound-evoked wave,” van der Heijden continues, “but I’m skeptical about the existence of what is customarily termed a cochlear amplifier.” His position makes sense, since after 35 years the evidence for amplification is still circumstantial at best, and experts disagree on the basic mechanisms. “Amplification requires phase-locked mechanical feedback to high-frequency input – as high as 100 kHz for bats and dolphins – which is physiologically very implausible.” Moreover, he points out, it serves no known purpose: In order to amplify faint sounds, you need to detect them in the first place – so why not stop there if your aim is to hear the sound? “You might think that amplifying faint signals improves their detectability, but that is not the case. Amplifiers always worsen the signal-to-noise ratio.” An alternative to amplification – the one that van der Heijden has taken – is focusing available sound energy. “In a wave this is done by slowing it down, which causes a traffic jam-like congestion of the energy. In addition, from measurements we know that by the time the vibrations are converted to neural signals, the speed of the energy transport has slowed down to a mere walking pace. No amplifier needed!” In fact, in vivo experiments1 by van der Heijden and his former PhD student Corstiaen Versteegh showed that deceleration is steep, giving sharp peaking. “However,” van der Heijden emphasizes, the question now becomes, What is the physics behind the steep wave deceleration?” In the paper, van der Heijden notes that he expects that these new data and ideas will help them to understand the basis of cochlear frequency selectivity and gain control in the near future.Another aspect of his study is determining precisely how the waveguide acts to spatially separate the frequency components of a wideband input. “Once you know how to build a waveguide that shows steep deceleration for one frequency, you can turn it into a spectral analyzer by introducing a longitudinal gradient. In this graded system, every frequency component travels fast until it reaches its own region of steep deceleration, at which will its amplitude will be magnified. The subsequent decay comes from the fact that slowly propagating waves are more susceptible to damping.” It is important to note that in this graded system, every frequency component delivers its energy at its proper place, making it a spectral analyzer. “Therefore,” he adds, “the main challenge is to design a waveguide in which frequencies up to, say, 1000 Hz travel fast, and all frequencies above 1000 Hz travel much more slowly. If you can do that, the rest is just details.”As might be expected, van der Heijden says that his key insight was the rejection of resonance – a well-accepted but nevertheless flawed attempt to model the inner ear put forth by Hermann von Helmholtz in the 1850s. More recently, in 1980 James Lighthill analyzed the combination of resonance with traveling waves. “An authority on fluid dynamics, Lighthill found that this combination creates deceleration and peaking,” van der Heijden explains. “While this appears useful, he also showed that such waves never get beyond their matching resonator – that is, they slow down indefinitely before reaching it. At the same time, our experimental data clearly showed a steep deceleration, but never a complete standstill – meaning that the wave shifts gears, but does not stop. Exit resonance.” Van der Heijden’s second insight came from studying fluid waves, which he charmingly describes as a delightful 19th-century physics topic. “Waves in shallow water are simple, in that all frequencies travel equally fast. However, in deep water there’s dispersion, with high frequencies propagating more slowly than low frequencies – and modifying the geometry strengthens dispersion. Imagine a deep lake covered with a layer of ice. Now cut a long, narrow slit in the ice, exposing the water,” he illustrates. “When you disturb the water, the waves propagating along the slit show an extreme form of dispersion. While this geometry resembles that of the cochlear fluid-filled canals, or scalae, van der Heijden points out that the dispersion obtained in this way is still too gradual to fully explain the steep deceleration of the waves observed in the cochlea. Interestingly, his third insight came from quantum mechanics, where bound systems have discrete energy levels. “When gradually changing the system – for instance, by applying a variable magnetic field – some energy levels may shift more than others, suggesting that you might be able to get two levels to cross by one overtaking the other,” van der Heijden tells Phys.org. “However, this does not happen: Instead, the two energy curves veer away sharply where they should cross, each following the projected trajectory of the other in what is known as avoided crossing. Von Neumann and Wigner articulated the mathematical explanation in 1929, and since wave propagation in complex systems is described by the same mathematical formalism, this suggests that avoided crossing can also occur in waves.” Indeed, he recounts, taking a waveguide that supports both deep and shallow waves, and manipulating only the shallow waves by installing an extra spring, he created a situation in which the dispersion curves of the shallow and deep waves were set to cross – but didn’t. “The avoided crossing produces a sharp kink in both curves, and this kink corresponds to the steep deceleration in one of the modes,” he explains. “Physically, the two modes exchange shape, meaning that mode shape swapping induces the sudden change of the speed of energy transport.” The paper predicts that in the near future the waveguide model and mode shape swapping will enhance understanding of cochlear frequency selectivity and gain control. “In terms of frequency selectivity, I say this because despite the math, the waveguide itself is almost embarrassingly simple compared to typical cochlear models based on resonance and amplification, and comprises only passive, linear elements,” van der Heijden notes. In other words, since its behavior depends on so few parameters, there is little opportunity to tweak the system, so it thereby makes a very specific prediction – namely, that the internal vibration mode of the cochlea changes drastically when varying the sound frequency. “The model therefore provides a clear theoretical framework to guide experiments,” he adds, “and recent developments in imaging techniques2 will enable testing these predictions. Should they be confirmed, this amounts to a huge simplification of the mechanisms behind auditory tuning… basically, some water and a handful of springs and dashpots” – dampers that resist motion via viscous friction – “instead of complicated feedback loops, amplifiers and resonators.”As for gain control, van der Heijden points out that our ears mechanically compress the dynamic range of sounds, and that this is done more or less independently in different frequency bands. “Current models implement gain control by a saturation of the amplifier elements. In the mammalian ear, this role is played by outer hair cells, which act both as sensors and actuators. My waveguide model is linear, so it has no gain control – yet: When local vibrations become too large, a simple array of what can be thought of as automatic brakes will engage, with a given brake damping the waves that peak near it. Again, while outer hair cells are also suited, braking is much simpler than amplifying!” Specifically, amplification requires extreme temporal acuity and braking does not – so again, the model leads to a significant simplification of the mechanisms and, again, calls for specific experiments, such as measuring the temporal acuity of the gain control in actual ears.One of the wider implications of spectral analysis though propagating wave mode shape exchange is that the modest structural requirements for mode shape swapping to occur in a fluid waveguide suggest its possible role in the spectral analysis by non-mammalian ears, such as birds, reptiles and amphibians. “These ears show a much larger morphological variety than the mammalian cochlea,” van der Heijden says. “Furthermore, the generality of the underlying principles of wave modes and dispersion raises the possibility of realizing mode shape swapping in entirely different settings such as optics.”Because spectral analysis and multiband gain control of sounds are already implemented in silico in cochlear implants, van der Heijden sees no particular advantage in replacing them with a mechanical device. “We’re currently much better in miniaturizing electronics than in miniaturizing mechanical devices such as outer hair cells, so I think that the electronic gain control of modern cochlear implants is hard to beat – and they may well be superior to the natural gain control of our ears, which isn’t that good anyhow. However,” he adds, “there’s another twist to this story: If I’m right that gain control is a brake rather than an amplifier, it may change our perspective on cochlear hearing loss. This makes it crucial to understand the exact mechanisms and cochlear structures involved in gain control.”Relatedly, van der Heijden notes that the auditory neural pathway interface is the bottleneck of all implants. “Electrical stimulation of the auditory nerve through the cochlear fluid is frustratingly unselective compared to the natural situation, where each of the thousands of nerve fibers targets exactly one inner hair cell,” he explains. “Therefore, even if a multi-electrode device has perfect spectral analysis and superior multiband gain control, most of that wealth is lost upon interfacing it to the nerve – which is why most implant users cannot enjoy music and have severe trouble with background noise. Theoretically, it would be better to mechanically stimulate the inner hair cells – if enough are left – but apart from building a multi-actuator micromechanical device, it would be difficult to insert it into the helical cochlear duct without ruining the soft tissues that are crucial to proper inner hair cell function.”Moving forward, van der Heijden and his research team will continue their measurements of nanometer vibrations in living inner ears of lab animals – and, not surprisingly, their focus is on gain control: “How does sound intensity affect wave propagation? When presented with rapid intensity fluctuations, what is the highest rate at which gain control can follow? We know it’s rapid, but temporal limits will inform us about the underlying mechanisms.” Layout of the double-beam waveguide. (A) Cross-section showing the half-cylindrical, fluid-filled chambers, the elastic beams B1 and B2 (green), and the fluid trapped in the slit between them. Fluid: light blue. Wave propagation is perpendicular to the plane of view. (B) Zoom-in showing the slit between the chambers and elastic coupling (red) between the beams. Credit: van der Heijden M (2014) Frequency selectivity without resonance in a fluid waveguide. Proc Natl Acad Sci USA Published online before print September 18, 2014. 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. , Journal of Neurophysiology Explore further Alternative geometries leading to fanning waves and squirting waves. Each pair of overlapping quadrangles represents the cross-section of the tunnel in which fluid is trapped. The two members of each pair depict the two extreme states of deformation and/or displacement during the cycle of the vibration. The upper row (F1–F4) shows vibration modes that preserve the tunnel cross-section and give rise to fanning waves if the tunnel is surrounded by fluid. Note that it is not necessary to have fluid chambers on both sides of the tunnel. The lower row (S1–S4) shows vibrations that change the cross-section and will give rise to squirting waves. Credit: van der Heijden M (2014) Frequency selectivity without resonance in a fluid waveguide. Proc Natl Acad Sci USA Published online before print September 18, 2014. , Journal of the Association for Research in Otolaryngology Regarding the waveguide model, he acknowledges that there are many questions to be answered, including:Which parameters determine the tuning sharpness?Once that is known, can we interpret the differences in hearing between species in terms of their different cochlear morphology?Can the model be adapted to mimic highly specialized cochleae like those of echolocating bats with their sharp filtering in a narrow frequency band?How can we incorporate gain control that mimics that of real ears?Currently the model is highly stylized. Can it be made more physiological, leading to more detailed predictions on the internal motions of inner-ear structures, which can then be tested experimentally?Regarding other innovations they might consider developing, van der Heijden says “I’d love to collaborate with experimental hydrodynamic experts and see if we can build a large-scale version of the fluid waveguide. It’s one thing to solve equations and describe an effect; it’s another to actually make it work in reality.” If successful, this could also provide insight into the critical structural properties of the inner ear. A number of other areas of research might benefit from their study, including, radio astronomy, precision sonar, and tissue analysis. “In principle, mode shape swapping could occur for any type of dispersive waves,” van der Heijden tells Phys.org. “The steep nature of the transition suggests its application to situations where a sensitive control of wave propagation is desired. In particular, optical realizations could be useful for filtering, switching or beam separation, while spectral analysis based on mode shape swapping may be useful in cases where other methods are unfeasible or have undesired side effects. Ideally,” he concludes, “reading the paper would help someone from another area to solve a problem I have never heard of!” Journal information: Proceedings of the National Academy of Sciences Fanning wave pattern of fluid motion. Colored lines are the projections on the plane of view of the circular trajectories of fluid particles in the upper chamber of the model waveguide. Wavelength, 3 mm. Line color is varied to help distinguish the individual trajectories. Credit: van der Heijden M (2014) Frequency selectivity without resonance in a fluid waveguide. Proc Natl Acad Sci USA Published online before print September 18, 2014. More information: Frequency selectivity without resonance in a fluid waveguide, Proceedings of the National Academy of Sciences Published online before print September 18, 2014, doi:10.1073/pnas.1412412111Related:1The Spatial Buildup of Compression and Suppression in the Mammalian Cochlea, Journal of the Association for Research in Otolaryngology August 2013, Volume 14, Issue 4, pp 523-545, doi:10.1007/s10162-013-0393-02Vibration of the organ of Corti within the cochlear apex in mice, Journal of Neurophysiology 1 September 2014, Vol. 112 no. 5, 1192-1204, doi:10.1152/jn.00306.2014 © 2014 Phys.org Researcher describes cochlear amplification using novel optical techniquelast_img read more

Best of Last Week – Earths invisible shield a sound loud enough

first_img Bridgmanite: World’s most abundant mineral finally named Citation: Best of Last Week – Earth’s invisible shield, a sound loud enough to bend light on a chip and toxic e-cigarettes (2014, December 1) retrieved 18 August 2019 from https://phys.org/news/2014-12-week-earth-invisible-shield-loud.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. © 2014 Phys.org (Phys.org) —It was a big week for discovery as a Star Trek-like invisible shield was found thousands of miles above Earth—it’s in the Van Allen radiation belt and appears to protect the planet below from “killer electrons.” Meanwhile, a 23,000-year-old limestone “Venus was dug up in France. The exceptional find is believed to have been carved sometime during the Paleolithic-era and is notable for the realistic rendering of its female features. Yet another team finally discovered the meaning of a handbook that had mystified researchers for 35 years, as an ancient Egyptian codex was finally deciphered. Turns out, it’s full of spells and invocations, and cures for common illnesses. Also, another team discovered and was able to analyze a small amount of perovskite found in a meteorite which has finally allowed the world’s most abundant mineral to be named: Bridgmanite—it’s believed to make up 70 percent of the Earth’s lower mantle, but couldn’t be officially named until it was analyzed firsthand. And researchers performing an autopsy on a 40,000 year old mammoth discovered blood that brings mammoth cloning closer to reality—they believe there is enough blood to extract a reasonable amount of DNA.center_img In other interesting news, a team of engineers made a sound loud enough to bend light on a computer chip, allowing for integrating optical circuits in the same layer of material as acoustic devices—that could mean advances in communications devices and possibly open the door to quantum applications. Meanwhile, another team of engineers described how they created a “‘superomniphobic” texture capable of repelling all liquids—and it doesn’t matter what the surface is made of. They believe it could help slow down corrosion in a wide variety of materials. Also interesting, a team of researchers in Australia reported that they are getting closer to showing how “body recognition” could compare with fingerprint identification. They’re looking at a wide variety of body measurements that taken together could serve as a means of identifying a unique individual.And finally, for those people who thought switching from “real” tobacco cigarettes to the new “fake” kind, to save their health, comes news from a team of researchers in Japan who have found that e-cigarettes contain up to 10 times the carcinogens as tobacco cigarettes. It’s because of the mix of materials that makers are putting in them, some of which are essentially poisoning e-smokers. Explore further The figure illustrates a sound wave passing across an integrated optical waveguide, overlaid with a color map of the light field in it. Credit: University of Minnesotalast_img read more

All latin and beat to me

first_imgLet the hip-shaking zumba and the energising rhythm of the conga jazz it up for you. Thanks to a clutch of Kolkata musicians and dancers, Latin music and dance forms have made a slow but steady start in India. Pioneers in introducing the Latin jazz genre in the country in 2006, city-based Los Amigos – a quintet of international and city-based musicians – is working hard to promote the relatively unknown version of jazz.‘Though we are really loved and appreciated in the city, we are yet to find a bigger audience across the country. There is not much awareness about Latin jazz in our country,’ Pradyumna Singh Manot aka Paddy, pianist and co-founder of Los Amigos, said. Also Read – ‘Playing Jojo was emotionally exhausting’Besides Paddy, Los Amigos comprises co-founder Monojit Datta (congas), Premjit Dutta (timbales), French percussionist Emmanuel Simon and Latin American musician Sergio Dinarte. The ensemble kicked off its international career with the 2011 Java Jazz festival in Indonesia and has performed in prestigious concerts such as the Congo Square Jazz Festival, Kolkata, and the Kala Ghoda festival, Mumbai.Paddy rues the fact that while listeners in the west are eager to try out new music, Indians are ‘slow to move forward’ in embracing non-traditional forms like Latin jazz – a unique juxtaposition of jazz from the US and the Latin music of South America. Also Read – Leslie doing new comedy special with Netflix‘People on the other side of the world are eager to listen to different kinds of music and when they search for Latin jazz in this part of the world, our band turns up. But Indians are not aware that such a genre exists,’ Paddy said. Moreover, a paradoxical attitude prevails. Music lovers are conscious about brands, but irreverent to quality.‘In India people recognise brands. So we are looking for a management which can make us a brand name, Paddy explained. Branding has indeed played a ‘huge role’ in making danseuse Satyaki Saha and partner Sovit Biswal household names. Fans may not connect with their outfit Mambo City, but the names Satyaki and Sovit are enough to evoke laudatory responses.The Kolkata couple were the only non-celeb participants in the fifth season of the Nach Baliye popular dance programme.‘People know our names though many have not heard of Mambo City, our team of two. Salsa plays a very important role in lifestyle, socialising and fitness for Indians in general. In Kolkata too it has grown to a large extent but still continues to be a niche market,’ Satyaki said.With the internet helping them grab maximum visibility, Satyaki feels things are looking up for those wanting to be professionals.‘The good news is that there are a lot of Salsa festival organisers in India who are doing a very good job of promoting this art,’ said Satyaki.last_img read more

Follow the light

first_imgThis one’s for the art lovers. Here is an artist who believes that her paintings are a part of the original universal energies of love and truth. Eva Maria Pecheno is ready with 26 pieces of her work to show the Capital how to Follow the Light. The artist believes that paintings are the mirrors of the inner and external self. The process of creation is directed by the heart and not the mind. She allows her feelings to direct her hands on the canvas. Also Read – ‘Playing Jojo was emotionally exhausting’Pecheno is a PhD Fine Art from the University of Barcelona and at the Ishwariya Vishwa Vidyalaya India. Eva studied at the cradle of western art at the Fine Art Faculty University of Athens Greece. Besides acquiring her graduate and posr graduate degrees, she has been teaching in all variety of students from governmental and private schools. Pecheno says, ‘When I paint my connection and concentration with the inner self is such as If I’m in meditation. I require deep silence to take the action.’ To create this particular group of paintings, she says that she had immersed herself in the expressions and energies of love, truth and sometimes it was hard to work out because the final battle is going on within her mind. She also says that she only prefers to follow the feeling which at the beginning can be in contradiction within the mind and the mind tries to control the matter – paintbrush, colours and effects. Yet, she trusts the flow and the synchronicity. She flows with the  time and feeling and lets the image appear.Where: Gallerie Alternatives, DLF Golf Course road, GurgaonWhen: 9 July – 23 July, 11 am to 7 pmlast_img read more

Agri dept set to aid farmers affected by hailstorms

first_imgKolkata: The state Agriculture department has decided to provide financial assistance to the farmers whose crops have been damaged due to recent hailstorms in various districts.The department has already started a survey to determine the quantum of loss for each farmer and how much compensation he is eligible for. The farmers who have seen damage of 33 percent of the total crops or more, are entitled to get the compensation from the state government. Also Read – Heavy rain hits traffic, flightsAsish Banerjee, state Agriculture minister, said: “We are chalking out an elaborate plan on how to extend financial assistance to the farmers in the hailstorm affected districts. We have instructed our officials in the district and the block level to carry out a detailed survey in order to ascertain the loss and also identify the beneficiaries who are entitled to get the compensation.”It has been learnt that various mouzas in the districts of East and West Burdwan, Birbhum, Midnapore, Murshidabad and some others Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedwere badly affected in the repeated incidents of hailstorm recently. In many villages, heavy damage has been inflicted upon the crops. To protect the farmers from incurring any loss caused by such incidents, the state government is all set to provide monetary assistance to the eligible farmers.Senior officials of the Agriculture department from the districts will conduct the survey at the block level, where the damages had taken place. On the basis of their observation, a detailed report will be prepared by these officials and then it will be submitted to the department. It may be mentioned that Bengal is the first state in the country to introduce crop insurance scheme, where the beneficiaries will not have to pay any amount as insurance premium in case of any natural disaster. Generally, the farmers have to bear 50 percent of the total cost of the insurance premium.Fasal Bima Yojana, the crop insurance scheme, a brain child of Chief Minister Mamata Banerjee, was introduced in the state to ensure that the farmers are not over-burdened with any debt. Earlier, the farmers had to bear a portion of the premium amount if their crops were damaged due to any natural disaster. The farmers need to register their names with the office of assistant director of agriculture at the block level, to avail the benefits extended by the state government. The Agriculture department has been conducting camps in various blocks to spread awareness about the insurance scheme.It is the Mamata Banerjee government that had conceived a plan in this regard, so that the farmers, more particularly the marginalised ones, do not need to bear the extra burden of insurance. After coming to power, Banerjee had laid great stress on the upliftment of the socio-economic condition of the farmers and thus introduced various developmental schemes.last_img read more

Remembering the master

first_imgCelebrating the 154th birth anniversary of Rabindra Nath Tagore, Kalyani Kala Mandir is organising a musical evening on May 10 at India International Centre. The show will start off with Shyam Path, songs from Bhanusingh’s Padawaali. The evening will also witness a Bharatnatyam performance by Rashmi Khanna, the founder of Kalyani Kala Mandir, along with classical singer Sumana Banerjee. Bhanusimha Thakurer Padabali is a collection of Vaishnava lyrics composed in Brajabuli by Rabindranath Tagore. Published in 1884, Tagore wrote them under the pseudo name Bhanusiha at the age of 16. The anthology consisting of 22 songs, dedicated to Kabambari Tagore, his sister in law, chronicles the romance between Radha and Krishna. Tagore seeks connection with divinity through appeal to nature and the emotional interplay of human drama. The poems primarily speak of the eternal love between Radha and Krishna, a bond that connected the two souls not in matrimony and yet brought them together for all eternity.When: May 10Where: India International Centrelast_img read more

Odisha exMLA arrested from Kolkata spa suspended from BJD

first_imgBhubaneswar: Odisha’s former MLA Nabin Nanda was arrested during a raid at a Kolkata spa where a sex racket was being run, informed sources said on Monday. The ruling Biju Janata Dal (BJD) has since suspended the former Dhenkanal legislator from the party. Nabin’s lawyer Asim Kumar confirmed that Nanda was arrested on Saturday evening from the spa on Park Street under the Immoral Trafficking Act and was bailed out on Sunday. As many as 18 persons, including nine sex workers, were arrested from the spa. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killed Nabin rubbished any connection with the sex racket and claimed he was detained after he entered the spa during an attempt to chase a pickpocket. “The allegations regarding involvement in the sex racket and what has been propagated is completely fabricated. I was out for shopping around 7 p.m. on Saturday when my pocket was picked. I chased the miscreants and entered the spa and was caught by a police team that mistook me to be a client,” said the former MLA.last_img read more