In radiation ventriloquism electromagnetic waves travel backwards

center_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. Citation: In radiation ‘ventriloquism,’ electromagnetic waves travel backwards (2008, September 23) retrieved 18 August 2019 from https://phys.org/news/2008-09-ventriloquism-electromagnetic.html Explore furtherlast_img read more

Robot with frog egg smell sensor w Video

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. This robot shakes its head when it gets a whiff of certain molecules. Credit: PNAS. Explore further Play A robot’s head shaking that has been triggered by an olfactory stimulus. Credit: PNAS. The genetically modified eggs were placed between a pair of electrodes to form a detector, which measures the current created when the receptors on the egg bind with the odor molecules. The frog egg detectors are far more sensitive and accurate than other biological smell receptors that use the physical vibrations of quartz rods that vibrate when target odor molecules bind to them. These detectors tend to give false positives when other molecules with similar molecular weights to the target molecules bind to them. The frog egg smell detectors were demonstrated in a robotic mannequin that shakes its head when it comes into contact with moth pheromones. It is capable of detecting solutions containing only a few parts per billion of the target molecule, and can distinguish between molecules with only slight differences such as -OH, -CHO and -C=O groups.The aim of future research is to use frog eggs to detect gases such as carbon dioxide. Takeuchi explained that the mosquito can detect people from the carbon dioxide they breathe out. This means the mosquito must have carbon dioxide receptors, and so if DNA is extracted from the mosquito and used to genetically modify the frog eggs, the eggs will also be able to detect the gas.Takeuchi said aother possible future application would be to create detectors for the ketone odor produced by people with diabetes or for aldehydes or other allergens in foods.The paper was published in the Proceedings of the National Academy of Sciences. Citation: Robot with frog egg smell sensor (w/ Video) (2010, August 26) retrieved 18 August 2019 from https://phys.org/news/2010-08-robot-frog-egg-sensor-video.html © 2010 PhysOrg.com Scientists transplant nose of mosquito, advance fight against malaria More information: Nobuo Misawa et al.: Highly sensitive and selective odorant sensor using living cells expressing insect olfactory receptors, Proceedings of the National Academy of Sciences, Published online before print August 23, 2010, doi:10.1073/pnas.1004334107 The researchers, Nobuo Misawaa, Hidefumi Mitsunob, Ryohei Kanzakic, and Shoji Takeuchi, used eggs from the African Clawed Frog (Xenopus laevis) to build their sensors. Eggs from this frog have been used in many laboratories to express olfactory receptors, and their protein expression mechanisms are well understood. This is the first time frog eggs have been used in a robot.The immature eggs were harvested and then injected with DNA from fruit flies, silk moths and diamond back moths, which stimulated the eggs to produce the olfactory sensors of these insects. Takeuchi, a bioengineer at the University, said the eggs basically acted as a platform for the parts of the insect DNA that have been shown in the past to be responsible for detecting gases, odors, and pheromones. PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen (PhysOrg.com) — Researchers from the University of Tokyo have invented a novel means of improving a robot’s sense of smell, by using inexpensive olfactory sensors containing frog eggs.last_img read more

Company pioneering new types of material for 3D printer ink

first_img © 2013 Phys.org 3-D printing, also known as additive manufacturing because of the nature of the process, is a relatively new science. A liquid material is applied to a base, allowed to dry, then applied again, over and over, resulting in the creation of a three-dimensional object. To date, most advancements in the field have centered around the printer—Emerging Objects is instead focusing on the material that is used as the ink.As noted on Rael and San Fratello’s website, plastic, the standard ink used as a base material for 3-D printers, is both limiting and environmentally unfriendly. Other materials, they say, allow for the creation of objects that look and feel different, and don’t pollute. One example is acrylic—objects printed using it as a base are brittle and rigid, similar to glass, but also have a smooth, powdery feel. Perhaps more exciting are printed objects that look like they are made out of wood. The base material is wood pulp, but because of the 3-D layering process, the resulting materials have a natural-grain appearance.The company points out that because their materials are made from natural local components, they cost much less than plastic. For example, they’ve printed objects made mostly of salt obtained from nearby San Francisco Bay. In addition, the size of the printed objects using the new materials is limited only by the size of the printer. The team is currently working on printing a room-sized object that, because it will be made mostly of salt, will look like it’s made out of milk.The objects being produced by Emerging Objects offer a glimpse of the exciting future of 3-D printing technology. At this point, it’s possible to imagine giant printers one day laying down new houses or skyscrapers, or even on-demand machines in our homes that conjure almost any object we desire—much like the replicator of Star Trek fame, perhaps? Explore further Citation: Company pioneering new types of material for 3-D printer ‘ink’ (2013, May 20) retrieved 18 August 2019 from https://phys.org/news/2013-05-company-material-d-printer-ink.html BotObjects announces first full color 3D printer— ProDesk3D (Phys.org) —Emerging Objects, a San Francisco based fabrication studio, is pioneering the use of new kinds of material for use as an “ink” with 3-D printers. To date, their materials are based on wood, salt, paper, cement, nylon and acrylic. Launched and run by architects Ronald Rael and Virginia San Fratello, the aim of the company is to develop material for the creation of 3-D buildings, building parts, and interior accessories using natural or renewable components. 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

Scientists investigate unidentified radio sources

first_img WISE, Fermi missions reveal a surprising blazar connection (Phys.org)—A team of researchers led by Andrea Maselli of the Institute of Space Astrophysics and Cosmic Physics of Palermo, Italy, has conducted an observational campaign of a group of unassociated radio sources with NASA’s Swift space observatory. The observations were aimed at revealing the true nature of these so far unidentified sources. The results were published Sept. 23 in a paper on arXiv.org. Citation: Scientists investigate unidentified radio sources (2016, September 28) retrieved 18 August 2019 from https://phys.org/news/2016-09-scientists-unidentified-radio-sources.html Explore further The sky map in the direction of the radio source designated 3C 86, obtained by XRT in the 0.3–10 keV energy band (left panel) and by WISE in the w1 filter (right panel). A yellow dashed line marks the positional uncertainty region of the 3CR source. White continuous lines shape the radio contours obtained from the NVSS map and corresponding to 0.01, 0.2, 0.7, 2, and 4 Jy beam−1; a white cross marks the position of the catalogued NVSS source. A red circle marks the position of the detected XRT source with the corresponding error radius. Credit: Maselli et al., 2016. © 2016 Phys.org 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. The Swift spacecraft, scanning the universe in the gamma-ray, X-ray, ultraviolet, and optical wavebands, is an invaluable tool when it comes to studying gamma-ray bursts and other electromagnetic events. It has already proved its scientific importance in many ways, for example by performing the first sensitive hard X-ray survey of the sky.Recently, Maselli and his team employed Swift to observe 21 bright radio sources included in the revised Third Cambridge Catalogue (3CR) of radio sources. The catalog contains celestial radio sources detected at 178 MHz that could advance our knowledge about the nature and evolution of powerful radio galaxies and quasars.However, some sources described in the 3CR catalog, including these detected by the NRAO VLA Sky Survey (NVSS), are not only unobserved in X-rays, but are, in fact, completely unidentified, lacking an assigned optical or infrared counterpart. The authors of the paper decided to fill this gap by conducting a supplementary optical-to-X-ray campaign with the Swift spacecraft, in order to better characterize the properties of these unidentified sources.”We have investigated a group of unassociated radio sources included in the 3CR catalog to increase the multi-frequency information on them and possibly obtain an identification,” the researchers wrote in the paper.Each of the 21 sources was observed by two telescopes onboard Swift – the X-ray Telescope (XRT) and the Ultraviolet/Optical Telescope (UVOT). The observation campaign lasted from November 2014 to March 2015.According to the research, out of these 21 investigated sources, nine exhibit significant emission in the soft X-ray band. The scientists managed to assign an infrared counterpart in the AllWISE (All Wide-field Infrared Survey Explorer) catalog for these nine sources and in four cases with no soft X-ray association.”After conducting Swift observations of 21 bright NVSS sources corresponding to 3CR sources classified as unassociated in the third update of the 3CR catalogue, we have obtained new X-ray detections for nine of them. Moreover, cross-matching the NVSS with the recent AllWISE Catalogue, we have found a WISE counterpart to all these nine X-ray sources, as well as to four cases with no X-ray detection,” the paper reads.What baffled the researchers is that no optical/UV counterpart has been found by UVOT, what lead them to an assumption that these unidentified radio sources should be classified as obscured active galaxies. However, the team added that it is too early to draw final conclusions as spectroscopic observations are needed to confirm this hypothesis.”Our analysis suggests that a spectroscopic analysis in the infrared range will be more helpful to identify their nature as well as potentially obtain a redshift measurement,” the team wrote. More information: A. Maselli et al. observations of unidentified radio sources in the revised Third Cambridge Catalogue, Monthly Notices of the Royal Astronomical Society (2016). DOI: 10.1093/mnras/stw1222 , Arxiv: https://arxiv.org/abs/1609.07484AbstractWe have investigated a group of unassociated radio sources included in the 3CR cat- alogue to increase the multi-frequency information on them and possibly obtain an identification. We have carried out an observational campaign with the Swift satellite to observe with the UVOT and the XRT telescopes the field of view of 21 bright NVSS sources within the positional uncertainty region of the 3CR sources. Furthermore, we have searched in the recent AllWISE Source Catalogue for infrared sources matching the position of these NVSS sources. We have detected significant emission in the soft X-ray band for nine of the investigated NVSS sources. To all of them, and in four cases with no soft X-ray association, we have associated a WISE infrared counterpart. Eight of these infrared candidates have not been proposed earlier in the literature. In the five remaining cases our candidate matches one among a few optical candidates suggested for the same 3CR source in previous studies. No source has been detected in the UVOT filters at the position of the NVSS objects, confirming the scenario that all of them are heavily obscured. With this in mind, a spectroscopic campaign, preferably in the infrared band, will be necessary to establish the nature of the sources that we have finally identified. , arXiv Journal information: Monthly Notices of the Royal Astronomical Societylast_img read more

People found able to recognize emotional arousal in vocalizations of land vertebrates

first_img Study finds babies younger than six months old able to acquire phonological knowledge Journal information: Proceedings of the Royal Society B 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. © 2017 Phys.org Explore further In addition to our spoken language, humans also utter a variety of sounds that reveal our emotional state—sounds such as moans of pleasure during sex, frightened screams or even angry growls. Scientists have noted that other animals make sounds that correlate to their emotional states, as well. In this new effort, the researchers sought to learn whether human beings are able to recognize which sort of emotional state other animals are experiencing based only on the sounds they emit.In the experiment, volunteers listened to prerecorded animal sounds and attempted to identify the emotional state of the creature that made it. To rule out the possibility that some sounds might be more or less recognizable by people who speak different languages, the volunteer group included people who spoke German, English or Mandarin. In all, the researchers played 180 vocalizations for the volunteers representing a very diverse group: black-capped chickadee, hourglass treefrog, American alligator, common raven, giant panda, barbary macaque and the African bush elephant. The researchers also carried out an acoustic analysis of the sounds on the recordings, comparing the sounds with people’s reactions to them and found that humans use many acoustic clues to understand emotional noises made by other animals.The researchers report that the volunteers were quite accurate in their ability to distinguish animal emotional vocalizations, showing an ability to distinguish between such sounds as cries of pain, exhilaration or fear in all of the land animals—regardless of which language the people spoke.This finding, the researchers suggest, hints at the possibility of common ancestral roots that evolved as a means of survival—being able to recognize the sounds other animals make when threatened, for example, could help humans prepare for what lies ahead.last_img read more

Rounding it up

first_imgLive Movie, a production, based on fiction story, is soon going to be staged in the Capital. Organised by Ummeed Theatre and directed by Dinesh Panwar, Live Movie mixes dancing, acting and singing together. The story is a package of comedy, drama, emotions, thrill, suspense, action and love.Ummeed Theatre is a place where students possessing different talents come from various parts of Delhi-NCR. They intend to bring alive the zeal of dance and music in the potential learning, giving them a platform to discover and outshine their own talent. They work in various batches for different levels to facilitate an easy learning environment for all the aspiring students.Other than music and dance, they also promote acting skills. They aims to revitalise the relationship between the aspirants and their respective potential by providing students with a great deal of exposure, prepare them for various stage shows and competitions.When: 14 September Where: Community Centre, Shahpurjat Timing: 9 am – 4 pmlast_img read more

Loud louder loudest

first_imgThe happiest music festival Bacardi NH7 Weekender is here again. Back with its 3rd edition in a row, the two-day festival that kicked off last Saturday was even bigger than the previous years. Music lovers thronged in thousands to catch some of the biggest international and Indian acts.After travelling to Kolkata, Bengaluru and Pune, Bacardi NH7 Weekender came to its final pit stop city for 2014 at Buddh International Circuit in Greater Noida. The massive four-city festival has now also introduced Shillong as its fifth addition, set to take place in February 2015! Also Read – ‘Playing Jojo was emotionally exhausting’The first day of the festival was a packed punch with an incredible lineup of both Indian and international artistes. Right from Songhoy Blues, all the way from Mali, Africa, charming the audiences with their refreshing brand of blues rock to The Raghu Dixit Project featuring Nritarutya who had crowds thronging to The Dewarists and asking for more. The funnymen from AIB had people in splits with their signature brand of edgy humor taking on everyone from Salman Khan to Narendra Modi. American heavy metal superstars Fear Factory to the soulful and mellifluous voice of critically acclaimed singer-songwriter Luke Sital-Singh was also witnessed. Bacardi NH7 Weekender this year also makes for an incredible audio visual spectacle!  Also Read – Leslie doing new comedy special with NetflixThe Bacardi NH7 Weekender had loads in store to keep Delhi audiences entertained through their Sunday with an exciting lineup, including critically-acclaimed international headliners The Vaccines (UK), Dinosaur  Pile (UK), Motopny (US), Goldspot (US) and Alo Wala (Denmark) to some of India’s biggest music acts Indian Ocean’s Tandanu featuring Pt. Vishwamohan Bhat, Kumaresh Rajagopalan, producer Amit Trivedi and bass baron Duke Nucleya to name a few.Over the last four years, the Bacardi NH7 Weekender has grown to be one of the country’s most loved musical weekends – representing Bacardi India and Only Much Louder’s commitment to giving fans unforgettable musical experiences. This year, over 100 artists will play at the Bacardi NH7 Weekender’s four editions – Kolkata, Bengaluru, Pune and Delhi.last_img read more

IDA join hands with KMC to conduct drives against tobacco consumption

first_imgKolkata: The Indian Dental Association (IDA) will join hands with the Indian Medical Association (IMA) and Kolkata Municipal Corporation in spreading awareness against the consumption of tobacco.As a part of its anti-tobacco campaign, the IDA has taken up a host of initiatives on the occasion of World No Tobacco Day on 31 May. The health awareness camp will be organised at Dr R Ahmed Dental College and Hospital. The IDA has taken a pledge to hold various health camps to make people aware of the ill-effects of tobacco consumption in various forms. Also Read – Heavy rain hits traffic, flightsRallies will be held, where people from all walks of society, will take part only to highlight the danger of consuming tobacco. Various others anti-tobacco drives will also be organised on the occasion of World No Tobacco Day. IDA organises regular health talks, check-up camps and give suggestions to the state government and thus helps in implementing the anti-tobacco laws in West Bengal.India is home to one of the largest number of tobacco consumers in the world and West Bengal contributes largely to that. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedAccording to Global Adult Tobacco Survey 2010(GATS), 36.3% of the population of West Bengal uses tobacco in some form. This would amount to as many as 2.5 crore of people.Oral cancer has been on the rise. Oral cancer constitutes about 40% of all forms of cancer in our country and 30% of them stem from the use of tobacco. People from all sections of the society are victims. Strict measures should be taken to check the use of Gutkha among the people in the state and also a ban on smoking in public places. Smokeless chewing of tobacco like gutkha, khaini, paan and so on leaves people of Bengal vulnerable to various ailments. Also, cigarettes, bidis and alcohol increase the risk further. Almost in all cases, the patient comes for check up due to toothache and finds he is in a pre-cancerous state, a radiation oncologist in the city said.Dr Raju Biswas, State Secretary of the Indian Dental Association said: “Tobacco epidemic is one of the major health threats to the public health system. Our initiative is to free West Bengal from the clutches of Tobacco epidemic. It is very encouraging to get full support from the state government.”last_img read more