Nano Air Vehicle The current model is a prototype and more development is required before any decisions are made on its deployment. Keennon said he expected the flight time to improve as the spybot develops, and said he envisaged it could be used for reconnaissance purposes in around a decade. He also said the final version is unlikely to look like a hummingbird, which is rare even in parts of the US, and he thinks a sparrow would be a better choice.The US military has funded the project, giving AeroVironment around $4 million since 2006. (PhysOrg.com) — A prototype robot spy “ornithopter,” the Nano-Hummingbird, has successfully completed flight trials in California. Developed by the company AeroVironment Inc., the miniature spybot looks like a hummingbird complete with flapping wings, and is only slightly larger and heavier than most hummingbirds, but smaller than the largest species. © 2010 PhysOrg.com More information: www.avinc.com/nano Hummingbird flight an evolutionary marvel Citation: Robot hummingbird passes flight tests (w/ Video) (2011, February 18) retrieved 18 August 2019 from https://phys.org/news/2011-02-robot-hummingbird-flight-video.html AeroVironment video of flight tests of its Nano Hummingbird flapping-wing nano air vehicle, developed for DARPA. Manager of the project, Matt Keennon, said it had been a challenge to design and build the spybot because it “pushes the limitations of aerodynamics.” The specifications given to the firm by the Pentagon included being able to hover in an 8 km/h wind gust and being able to fly in and out of buildings via a normal door.The spybot was developed for the US military’s research arm, the Defense Advanced Research Projects Agency (DARPA). The hummingbird appearance is intended to disguise the bot, although it would look decidedly out of place and would attract attention in most places in the world since hummingbirds are not found outside of the Americas.DARPA’s head of the Nano Air Vehicles (NAV) program. Dr Todd Hylton, said the successful flight tests pave the way for new vehicles that resemble small birds and match their agility. The new drone is a departure from existing NAVs, which in the past have always resembled helicopters or planes. The Hummingbird’s bird-shaped body is removable but it gives the bot an uncanny resemblance to a real hummingbird. The vehicle can hover and maneuver just like the bird. The ornithopter can fly into buildings under the control of an operator flying the spybot with the help of a feed from its tiny video camera. The prototype is capable of flying at speeds of up to 18 km/h (11 mph) and weighs 19 grams, which is about the same as an AA battery. Explore further Nano Air Vehicle 360 Degree Flip 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.
Allocosa brasiliensis. Image credit: Nico Olejnik 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. (PhysOrg.com) — While most people are familiar with the fact that many species of female spiders eat their male counterparts, new research findings published in the Biological Journal of the Linnean Society show how biologists have found a species with an apparent role reversal with the male eating the female. Mosquitoes supply spider with blood © 2010 PhysOrg.com More information: AISENBERG, A., COSTA, F. G. and GONZÁLEZ, M. (2011), Male sexual cannibalism in a sand-dwelling wolf spider with sex role reversal. Biological Journal of the Linnean Society, 102: no. doi: 10.1111/j.1095-8312.2011.01631.x Located in Uruguay, Dr. Anita Aisenberg and the team of biologists from the Clemente Estable Institute of Biological Research have been studying the Allocosa brasiliensis. This nocturnal wolf spider is found on South America’s Atlantic Ocean coast and within the riverbank sand dunes. The study of these spiders began as they are an indicator of the coastal habitats health.However, during this study, they observed a male spider eating a female spider and set out to determine if this behavior was normal for the species as it has never been observed before in any other species. Where female spiders are usually larger and the dominant of the two, the researchers have found that with the Allocosa brasiliensis, the male has a traditional role reversal.The male spiders were observed waiting in their burrows for the females searching for mates. From what was observed by the researchers, the male spiders tended to mate with the younger, more productive virgin female spiders. The older, less productive female spiders were instead eaten by the male spider. It appears that the choice of whether to eat or mate with a female spider is based on the higher reproductive possibility.The environment where the Allococa brasiliensis live is one of instability for the spiders and the prey is unpredictable. In addition to this the area offers extreme temperatures and strong winds. Dr. Aisenberg believes that this unstable environment may have been a contributing factor to the apparent role reversal and unusual sexual behavior. Citation: Male wolf spiders cannibalize females (2011, April 13) retrieved 18 August 2019 from https://phys.org/news/2011-04-male-wolf-spiders-cannibalize-females.html
Novel Ear-like Dual Microphone System Tunes Out Background Noise In Cellphones Citation: Enterprising engineers build world’s smallest microphone (2012, January 5) retrieved 18 August 2019 from https://phys.org/news/2012-01-enterprising-world-smallest-microphone.html (PhysOrg.com) — Imagine what you could do with a microphone so small, it’s almost invisible to the naked eye. Clearly there would be practical uses, such as in creating hearing aids that no one would notice, or devices that could be applied with a mild adhesive on or near the mouth or jaw bone to allow for instant communications via Bluetooth technology; but what of other more clever applications, such as always-on implanted heart monitors or super-sensitive devices that could be used as hidden monitors to detect intruders or the presence of others for those with vision impairments. 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. More information: © 2011 PhysOrg.com All of these things and more are likely on the way as research engineers continue to invent new ways to build ever smaller microphones. The new record holders are Bahram Azizollah Ganji, of Noshirvani University of Technology, in Iran, who has built a microphone that is just a half mm square, or put another way, just 700 square microns, and Bosch Sensortec GmbH, who apparently have made one that is roughly the same size. Either way, these microphones are tiny; so tiny most people wouldn’t notice them at all unless one was sitting alone on a pure white backdrop. Perhaps just as important, the tiny new microphones appear to be both highly sensitive and tiny power consumers.The tiny microphone market is huge, with some 685 million of them in various sizes and shapes sold in 2010 alone. Currently they are used in phones, electronic notepads, research equipment, computers, cameras, and a myriad of other devices (including spy equipment no doubt). But the rush is on to make them ever smaller, which should not only allow for smaller sized devices such as cell phones, but new uses for them altogether. Imagine a microphone placed strategically on either side of a person’s mouth, allowing someone listing to them on a dual speaker phone to hear their voice in stereo, or what if such microphones were to be embedded into the very construction elements of buildings, allowing people to speak to one another from their offices without having to use a phone at all, assuming they were all connected to a voice activated computer system of course. The possibilities seem almost endless.Some industry analysts, such as the trend watchers at IHS iSuppli, say that the tiny microphone market has more than doubled in just the past year, and expect such growth will not just continue, but grow. Thus, the development of ever tinier microphones is not just cool, it’s likely to be extremely lucrative. via ISNA
Want to know if your partner’s cheating on you? Just listen to their voice 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 A team of researchers with members from the U.K., Poland and Germany has found that women tend to lower their voices when competing sexually for a man. In their paper published in Proceedings of the Royal Society B, the group describes their study involving participants in a speed-dating event and what they found. Citation: Study shows women lower their voice when competing for a man (2018, December 19) retrieved 18 August 2019 from https://phys.org/news/2018-12-women-voice.html To learn more about the many facets of human courtship, the researchers received permission to record participants in two speed-dating events. In all, there were 30 participants, all heterosexual and all between the ages of 20 and 40. The researchers note also that the events transpired as usual—the women remained seated at their positions as the men traveled to each woman one by one. As the events unfolded, each participant made known their receptiveness to each potential mate by marking “Yes” or “No” on a questionnaire. Each participant was then able to see how many other people had marked “Yes” or “No” for each new “date” they spoke with.In listening to the recordings and comparing them to the scores the participants had received, the researchers spotted some patterns. First, men tended to lower their voices when speaking with someone that they would wind up giving a “Yes.” That was expected; prior research has shown that men tend to lower their voices when speaking with someone they find sexually attractive. But the researchers were surprised to find that the women did the same thing. Instead of making their voices higher when sexually attracted to a man, as prior research had suggested, the women participants tended to lower them—going husky, as it were. But there was also a caveat—the women only lowered their voices when speaking with a man they found sexually attractive if other women at the event had also judged him so by giving him a “Yes.”The researchers report that they found the women at the event to be choosier, also—they gave a “Yes” to just a third of the men they spoke with. Men, on the other hand, were less choosy, giving a “Yes” to half of all the women they met. Journal information: Proceedings of the Royal Society B © 2018 Science X Network More information: Katarzyna Pisanski et al. Voice pitch modulation in human mate choice, Proceedings of the Royal Society B: Biological Sciences (2018). DOI: 10.1098/rspb.2018.1634 Credit: CC0 Public Domain
Paying A tribute to renowned art critic Late Keshav Malik, a group exhibition titled Golden Moments is being organised by artist Arshi Hafeez. The show will display the works of 19 artists from across the country. Hafeez, also the curator of the show, tries to bring forward the innermost elation and joy of the golden moments in the form of paintings and sculptures installations.Some of the participant artists are – Yasin Sahab, Mahesh Kumar, Naresh Kapuria, Parul Arya, Alpana and others. The show will display a diverse mediums and art forms , from paintings to sculptures and installation art. Golden Moments is a potpourri of the innermost elation and joys of an artist exploring his creativity.When: On till 31 JulyWhere: Visual Art Gallery, India Habitat Centre Timing: 11 am – 7pm
Amidst complaints among CBSE class XII students over the “difficulty level” of their mathematics examination, the board has called some school principals for a meeting to discuss the matter and is also mulling whether to give a relaxation in the marking for the paper.According to HRD ministry sources, one of the options on the table could also be an “improvement exam”, on which a broader consensus has to be evolved.Board officials said there have been some changes in the pattern of the paper and that schools may not have been “intimated accordingly” in that regard. Also Read – Company director arrested for swindling Rs 345 croreThe all-India exam conducted on Wednesday left students disappointed and concerned as they found the mathematics paper too tough. Teachers also felt that the paper required higher order thinking skills (HOTS) which, as per the examination pattern, forms 10 to 20 per cent of the paper. “There have been some changes in the question paper pattern and some schools may not have been intimated accordingly. So, we want to ensure that students are not put through any kind of harassment,” said a Central Board of Secondary Education official. Also Read – Man who cheated 20 women on matrimonial websites arrestedThese issues would come up in the meeting with the principals which, the official said, would include “the nature of the questions, the level of difficulty, etc”.The official also said that an evaluation committee will meet after the exams are over to take stock of the grievances of the students and decide whether any grace marks could be awarded to them. It was also indicated that the question pattern framed was to ensure that there is rationalisation in the marking system.
Kolkata: Vice President M Venkaiah Naidu today released a commemorative coin of Rs 125 denomination on the occasion of 12th Statistics Day and 125th birth anniversary of scientist Prasanta Chandra Mahalanobis. Naidu, who unveiled the coin at Indian Statistical Institute (ISI) in north Kolkata in the presence of Union Statistics Minister D V Sadananda Gowda, said he felt privileged to be a part of the programme. Bratya Basu, the state’s information technology and electronics minister, was also present at the occasion among other dignitaries. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killed The vice president referred to Mahalanobis as the “architect” of national sample survey organization and a “visionary” who set up the north Kolkata institute. “This is a wonderfully designed coin – a fitting tribute to Mahalanobis, who was a great soul and genius statistician. I am happy to be a part of this initiative,” he said. Union minister Gowda, during his speech, said the country had been observing June 29 as Statistics Day since 2007 in recognition of the invaluable contribution of Mahalanobis. Also Read – Naihati: 10 councillors return to TMC from BJP “Mahalanobis had thought about an environment, where information would be secure and data collection would be done for professional considerations. ISI has lived up to that objective,” he said, adding that the government would be drafting a statistics policy soon after taking opinion of all stakeholders. The director of the institute, Sanghamitra Bandyopadhyay, said the institution had been facilitating high-level inter-disciplinary research in statistics, driven by real-life problems faced by the country, as visualised by its founder. An audio clip, dwelling on the three-decade-long relationship between Mahalanobis and Rabindranath Tagore, with voice-over of noted actor Barun Chanda, was also released at the institute today on this occasion.
Relationship status can affect who and what we find attractive. A new study has found that if we are in a relationship, we are more likely to be attracted to faces resembling our own, but for single people opposites attract.“For the first time, we have observed how our partnership status affects who we find attractive,” says Jitka Lindova from Charles University in the Czech Republic. The team showed a series of photographs of faces to university students and asked them to rate their attractiveness. The photographs were digitally manipulated so that the resemblance to the student was modified. Images were of an individual of the opposite sex, whose face had been manipulated to look either more or less similar to the student. They were also presented with images of a same-sex individual manipulated in the same way. “We found that single participants, those not in relationships, rate dissimilar faces as more attractive and sexy than self-resembling faces,” Lindova said. This was observed when participants rated both same-sex and opposite-sex faces. Also Read – ‘Playing Jojo was emotionally exhausting’“Our interpretation is that attractiveness perception mechanisms that give us a preference for a genetically suitable partner may be suppressed during romantic relationships,” she explained. The study was published in the journal Frontiers in Psychology. “This might be a relationship maintenance strategy to prevent us from finding alternatives to our own partner, or perhaps self-resemblance becomes more important in terms of the social support we expect receive from relatives, which are known as kinship cues,” Lindova explained.
High doses of vitamin D taken one hour after sunburn may significantly reduce skin redness, swelling and inflammation, a study claims. Researchers conducted a clinical trial in which 20 participants received a placebo pill or 50,000, 100,000, or 200,000 international unit of vitamin D one hour after a small ultraviolet lamp ‘sunburn’ on their inner arm.They followed up with the participants 24, 48, 72 hours and one week after the experiment and collected skin biopsies for further testing.The researchers from Case Western Reserve University in the US found that participants who consumed the highest doses of vitamin D had long-lasting benefits – including less skin inflammation 48 hours after the burn.Participants with the highest blood levels of vitamin D also had less skin redness and a jump in gene activity related to skin barrier repair, researchers said.”We found benefits from vitamin D were dose-dependent,” said Kurt Lu, assistant professor at Case Western Reserve University.Researchers hypothesised that vitamin D helps promote protective barriers in the skin by rapidly reducing inflammation.”What we did not expect was that at a certain dose, vitamin D not only was capable of suppressing inflammation, it was also activating skin repair genes,” Lu said.The results suggest vitamin D increases skin levels of an anti-inflammatory enzyme, arginase-1. The enzyme enhances tissue repair after damage and helps activate other anti- inflammatory proteins.”I would not recommend at this moment that people start taking vitamin D after sunburn based on this study alone. But, the results are promising and worthy of further study,” Lu said. The study was published in the Journal of Investigative Dermatology.
Now that it’s fall, it’s time to add another layer to your dashing fit. Winter capes which stood out as the celeb favorite last year is all set to rule the winters again. Sneha Mehta, founder of ‘Kukoon the Label’ have shared some expert tips on which type of cape one should wear for their ideal cold days. Vibrant rhythmic silk capes: Ideally when we head for a winter wedding we don’t prefer wearing a cardigan or an over coat as it just doesn’t go with the outfit. A cape with your Indian outfits will just look out of the box and will make the fashion quotient high. So let the silk capes enrich your wardrobe before winter overtakes you. Also Read – Add new books to your shelfAnimal print: The animal print winter essentials has a strong game for the season, but covering oneself with the same print just makes the look a little dead. Going glamorous with shades of soft beige and baby pink with a cheetah skin spots sets off a bold statement that won’t fail to make a lasting impression.Inhale courage: Deciding the right outfit which makes you look different from the crowd appears to be a task. But, by wearing bold designed capes with your dresses or your pants, you can be the star of the show. For example, one can go for a deep teal velvet color with a bold print which combines an impact and a luxury that has an enticing mystery about it. Also Read – Over 2 hours screen time daily will make your kids impulsiveGo timeless: Dressing sober makes most of the impact to your dressing style. For those cold office meetings, where a bomber jacket doesn’t fit well one can always go for sober timeless capes. The simplistic design works great on these capes and leaves understated impacts to any event to you choose to wear it on. One can also enhance the timeless glamour by adding bold earrings to your look.