Windpowered car completes 3100 mile test ride across Australia

first_img(PhysOrg.com) — Score some points for the green set this week! In Australia a wind-powered car has completed a roughly three-week, 3,100 mile test ride. The car, which is powered by a 8kWh lithium-ion battery, just like many electric cars currently available to consumers on the market, but this one gets its juice not from the plug, but from a mobile wind turbine. The wind turbine is supported by a 20-foot telescopic bamboo mast. The car does have a plug available for times when it is not windy out. The car, which has been aptly named the Wind Explorer, was constructed by two intrepid German adventurers: Dirk Gion and Stefan Simmerer, who over a period of about six-months. The end product, which is a carbon-emissions free vehicle, weighs a scant 440 pounds. This weight is fairly amazing when you consider that the Nissan Leaf and the Chevy Volt each weigh about 3,500 pounds. This weight becomes no surprise when you look at the vehicle, which roughly resembles a egg with two head rests sticking out of the top. The body is made of a carbon fiber mounted onto an aluminum frame. The tires used on this car come from a racing bicycle. They were chosen to reduce drag. The Wind Explorer reached a top speed of about 55 mph on this journey. Wind-powered car goes down wind faster than the wind Explore further Citation: Wind-powered car completes 3,100 mile test ride across Australia (2011, February 16) retrieved 18 August 2019 from https://phys.org/news/2011-02-wind-powered-car-mile-australia.htmlcenter_img © 2010 PhysOrg.com The journey took 18 days and spanned the continent of Australia, with the two designers splitting the drive time. The vehicle can now boast holding several records for wind-powered vehicles. Some of the records set include: the first vehicle powered by wind to cross a continent, the longest overall distance covered, and the longest distance covered by a wind-powered vehicle in 36 hours. More information: www.wind-explorer.com/index.php/start_en 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

Ramnits heist bags 45000 Facebook passwords

first_img Computer experts warn of Bin Laden malware scams Citation: Ramnit’s heist bags 45,000 Facebook passwords (2012, January 6) retrieved 18 August 2019 from https://phys.org/news/2012-01-ramnits-heist-bags-facebook-passwords.html Ramnit’s command and control center is visible and accessible, and the security experts were able to determine the precise number of Facebook victims, which consisted of 69 percent from the UK, 27 percent from France and 4 percent from other countries.When Ramnit first started causing mischief in 2010 it was considered as a low-level threat, comments SearchSecurity.com.That assessment has changed. Ramnit’s operators were able to graduate from an older generation of techniques to infect files to morph it into something more powerful, adding Zeus source code to the mix. Trusteer, another security company, warned that the worm had acquired the ability to inject HTML code into a web browser.A worm is a type of malware that secretly integrates itself into program or data files, and infects more files each time the host program is run. Ramnit can infect Windows executable files, HTML files and other file types.Ramnit’s subsequent target was finance, bypassing two-factor authentication and transaction signing systems. In gaining remote access to financial institutions, Ramnit was able to compromise online banking sessions and was able to penetrate corporate networks. Even before the latest Facebook heist, Seculert, using a sinkhole security tool, counted 800,000 machines as infected with Ramnit from September to the end of December 2011.Ramnit’s presence is not immediately obvious. The worrisome nature of Ramnit is compounded by the fact, say experts, that users tend to use the same password for a number of web-based services, which may include not only Facebook but their mail, a VPN, and others..Blogger reactions to the news have ranged from “Change your passwords, and often!” to “Don’t click any links, never, no matter from who or how interesting!” Considering the very definition of social networks and why they are used, that kind of advice may be timely but curiously counter to the whole point. Suspecting friends and relatives of having virus-choked messages and afraid to share links for fear of infection run counter to the reason why users sign on to social networks. Behavioral trends and countertrends will get interesting too.Another troubling sign of the times is what cybercriminals now see as choice game. E-mail worms are so Yesterday, say computer security experts.Malware writers are replacing old-school worms transmitted via email with their malware now targeted for social-networks. (PhysOrg.com) — Ramnit, the bank-thieving worm, is at it again, this time scoffing up Facebook accounts. The latest oh-look-another-threat is one that security watchers say could get ugly. Ramnit has grown up since it was first discovered as a virus in the wild in 2010. Security company Seculert has posted a January 5 blog saying that Ramnit has stolen 45,000 Facebook login credentials. The accounts are mostly in the UK and France. The security firm, which has been tracking Ramnit, discovered the stolen Facebook cache in its Seculert labs. Seculert in turn passed on to Facebook the stolen credentials that it found on Ramnit servers. © 2011 PhysOrg.com 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 More information: blog.seculert.com/2012/01/ramnit-goes-social.html Number of Ramnit Infected Machines Between September 2011 and December 2011. Image: Seculert.last_img read more

New binary system showcasing beaming effect found by astronomers

first_imgPhase folded light curve and the best fitting transit model of EPIC 219654213. Gray points are the measurements, black circles the binned data. The continuous line represents the best fitted model. Residuals to the fit are shown in the lower panel. Credit: Eigmuller et al., 2018. © 2018 Phys.org 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. Citation: New binary system showcasing beaming effect found by astronomers (2018, September 5) retrieved 18 August 2019 from https://phys.org/news/2018-09-binary-showcasing-effect-astronomers.html An international team of astronomers has discovered a new eclipsing binary system composed of an M-dwarf orbiting a main sequence star. The transiting dwarf star exhibits the so-called relativistic beaming effect. The finding is reported in a paper published August 20 on the arXiv pre-print repository.center_img Journal information: Monthly Notices of the Royal Astronomical Society Astronomers detect a doubly eclipsing quadruple star system The relativistic beaming effect, also known as Doppler boosting, is the process by which relativistic effects modify the apparent luminosity of emitting matter that is moving at speeds close to the speed of light. The process is caused by the reflex motion of the stars introducing photometric flux variations due to the Doppler effect.Measurements of the beaming effect are important for astronomers studying binary systems, as they allow independent estimate of the radial velocity of secondary components. This could be crucial in disclosing physical parameters and the nature of such systems.Now, using data from NASA Kepler spacecraft’s prolonged mission known as K2, a group of researchers led by Philipp Eigmuller of the German Aerospace Center (DLR) has studied the star EPIC 219654213, which was initially identified as a potential host for a planetary system.However, K2 data complemented by follow-up spectroscopic observations with ground based observatories, including Keck telescope, Nordic Optical Telescope (NOT) and McDonald Observatory, indicate that EPIC 219654213 is a binary star. The observational campaign allowed also the scientists to determine fundamental parameters of the newly found system.”In this paper, we present the detailed characterization of a DEB [detached eclipsing binary] formed by a main sequence star and an M dwarf companion with precise K2 photometry and ground-based radial velocity follow-up,” the astronomers wrote in the paper.The primary component of the system is a slightly evolved main sequence star of spectral type F7V. The star, about 4.1 billion years old, has a radius of approximately 1.52 solar radii and a mass similar to that of our sun.The companion is a dwarf star of spectral type M5V. It is about five times smaller and less massive than the sun. The dwarf is on a nearly circular orbit around the primary star, orbiting it every 5.44 days. The components of the system are separated by approximately 0.065 AU.The authors of the study also provided the details about the beaming effect observed in the system, focusing on its amplitude.”The results show a change in the amplitude of the beaming effect of 35ppm, which account for 50 percent of the observed discrepancy between expected and observed beaming effect,” the paper reads.In concluding remarks, the researchers noted that EPIC 219654213 should be further investigated using exoplanet-hunting missions such as NASA’s Transiting Exoplanet Survey Satellite (TESS) and ESA’s PLAnetary Transits and Oscillations of stars (PLATO). More observations of this system may confirm if its smaller component is indeed an M dwarf or a brown dwarf or, what is also possible, a highly inflated “hot Jupiter” exoplanet. More information: A transiting M-dwarf showing beaming effect in the field of Ruprecht 147, arXiv:1808.06325 [astro-ph.SR] arxiv.org/abs/1808.06325Ph Eigmüller et al. A transiting M-dwarf showing beaming effect in the field of Ruprecht 147, Monthly Notices of the Royal Astronomical Society (2018). DOI: 10.1093/mnras/sty2155AbstractWe report the discovery and characterization of an eclipsing M5V dwarf star, orbiting a slightly evolved F7V main sequence star. In contrast to previous claims in the literature, we confirm that the system does not belong to the galactic open cluster Ruprecht 147. We determine its fundamental parameters combining K2 time-series data with spectroscopic observations from the McDonald Observatory, FIES@NOT, and HIRES@KECK. The very precise photometric data from the K2 mission allows us to measure variations caused by the beaming effect (relativistic doppler boosting), ellipsoidal variation, reflection, and the secondary eclipse. We determined the radial velocity using spectroscopic observations and compare it to the radial velocity determined from the beaming effect observed in the photometric data. The M5V star has a radius of 0.200+0.007−0.008 R⊙ and a mass of 0.187+0.012−0.013 M⊙. The primary star has radius of 1.518+0.038−0.049 R⊙ and a mass of 1.008+0.081−0.097 M⊙. The orbital period is 5.441995±0.000007 days. The system is one of the few eclipsing systems with observed beaming effect and spectroscopic radial velocity measurements and it can be used as test case for the modelling of the beaming effect. Current and forthcoming space missions such as TESS and PLATO might benefit of the analysis of the beaming effect to estimate the mass of transiting companions without the need for radial velocity follow up observations, provided that the systematic sources of noise affecting this method are well understood.last_img read more

What if we knew when people were lying

first_img“For me, a world in which people could know the truth that mattered to them would be a great world,” Freshman says. “We’d have less discrimination and more equity.” In Season One of the TV show The Good Place, Chidi Anagonye, an ethics and moral philosophy professor, faces a dilemma when a colleague asks his opinion about a new pair of boots. Chidi clearly dislikes the boots, which are a garish shade of red and encrusted in crystals, but to spare his colleague’s feelings, he says that he loves them. — Chidi immediately regrets lying and begins obsessing over his moral failings, even as his exasperated girlfriend reassures him, “Sometimes we just lie to be polite.” Eventually, Chidi can no longer bear the guilt and confesses his true feelings to his colleague: “The boots are terrible, and hideous, and I hate them!” The colleague is clearly hurt by the revelation.  center_img For Chidi and some other philosophers, the obligation not to lie trumps all other moral imperatives, including not hurting someone’s feelings. Few people actually adhere to such a strict prescription for honesty, however. Lying is an accepted part of daily life, from our automatic response of “good” when asked how we are, to the praise we give when a friend asks if we like her awful new haircut (or pair of boots). We’d also have more hurt feelings. For most of us, a world without lies would deliver an immediate blow to our self-image, says Dan Ariely, professor of psychology and behavioural economics at Duke University. “Living with the truth means you would get more honest, brutal feedback about your work, the way you dress, the way you kiss – all kinds of things like that,” he says. “You would realise that people don’t pay as much attention to you and you’re not as important and highly qualified as you think you are.” Read the whole story: BBClast_img read more

Music reigns his heart

first_imgLeading the terrific trio for Dhruv Visvanath Trio, Dhruv is a young sensation on the music block. With Hemant Chona on bass, Ishaan Gandhi on drums and Dhruv Visvanath on lead guitar and vocals, the band is all set to wow the Capital this Thursday night.  At the age of 20, you have a band that performs on significant platforms. Share your journey with us, how did you get initiated into music.Well, I have two bands actually, one is my own trio, The Dhruv Visvanath Trio and the other is Cobbled Street. I have two very different roles in both the bands but it is a rather enjoyable experience. And I’ll take anything where I get to be a little silly on stage! Guitar featured in my life after 7 years of playing the piano. I loved the instrument a lot but it felt a lot more like an exercise towards the end. I really wanted to start with something new and there lay the guitar. I’ve been teaching myself for about 8 and a half years and the experience never ceases to grow old. As for the bands, well I play a lot of solo shows given my genre-guitar spanking, or percussive acoustic guitar as I like to call it. I formed the trio to let out the slightly more angry, and loud songwriter in me. The band is relatively young, in fact only 6 months or so. Also Read – ‘Playing Jojo was emotionally exhausting’With a performance round the corner, you are caught up in exams. How do you manage your two worlds? Haha! Well the thing is my mind is absolutely blank! I have no clue how this time has passed, but I try to divide my time between my work and my play. I tend to be very disciplined in terms of keeping my hands off the guitar during exam time, but for the show at Hard rock, I just can’t quite resist! I study Geography at the University of Delhi, and I’m 4 days away from completing my last year! This is a really busy time of year, but I want to go out with a bang!Three long years into a  music career already, do you plan to take it up professionally after college?It’s my dream to be a musician fulltime and travel the world with it. I’d really love to tour Europe and Oceania and South and South East Asia with my music! Although I’ve been very determined to be well educated before i embark on this risk, and i wish to complete my masters before following my dream all the way through!last_img read more

A sweet Diwali with a twist

first_imgChefs across the city are trying their hand at whipping up some special Diwali dishes. But then let’s separate the men from the boys.Chef Prem Kumar Pogakula, Executive Sous Chef at The Imperial shares with us two of his latest creations for this festive season – The Puffed Lotus Nut Seeds (Makhana) Kheer with Almond Chikki and the Chocolate Gulab Jamun Millifile with Truffle and Crumble.Both the dishes are available in 1911 at The Imperial on request only. We have included the recipes of the desserts below if you are ambitious enough to try them at home for Diwali.1911 also has their regular Sunday buffet on (Rs 2900 per person without taxes) and they will be hosting live stations on the terrace for guests on Diwali.And for those who want to just want to sit back and be served, don’t miss these! Head over. (A meal for two at 1911 costs Rs 5000 without taxes and alcohol).last_img read more

NDITA sets up pocket parks in Sector V

first_imgKolkata: Nabadiganta Industrial Township Authority (NDITA) will set up pocket parks mainly for IT employees in Sector V.The construction of the first park is going on in full swing. Two other parks will come up shortly.The first park has come up on a plot where people used to offload garbage. There were illegal shanties. NDITA officials had rehabilitated the shanty dwellers to another place.The pocket park will give relief to the IT employees who sit in front of computers for long periods. Also Read – Heavy rain hits traffic, flightsDuring recess, they visit the roadside tea or food stalls , have their food and quickly go back to their place of work.Pocket parks are places where they can relax for some time, enjoy the green, have their food, gossip with the colleagues and then go back to their work. Such parks are quite popular in areas where IT hubs have come up both in the country and abroad.The parks will have green cover and some benches will be put up for them to sit there and enjoy the green. They can have their food. The green serves as oasis amidst of concrete construction.Such parks are quite popular in Silicon valley and famous political correspondent of New York Times Thomas L Freedman has written several pieces on IT employees making the parks as the central plot.last_img read more

Gas consumers can get 5kg cylinders at subsidised rate

first_imgTill now, cooking gas (LPG) was available for domestic use in 14.2-kg cylinders. Consumers were entitled to 12 such bottles in a year at subsidised rate of Rs 417 in Delhi.Now the subsidised cooking gas is also available in 5-kg packs, costing Rs 155 per such cylinder in Delhi.Oil Minister Dharmendra Pradhan told Rajya Sabha on Wednesday that consumers can avail of 34 cylinders of 5-kg in a year at subsidised rates. Any requirement beyond that would have to be bought at market price of Rs 351 per bottle. Also Read – I-T issues 17-point checklist to trace unaccounted DeMO cashLike the 14.2-kg cylinders, the mini subsidised packs are available at the regular LPG dealer or distributors. 5-kg LPG cylinders are available at select petrol pumps but at market price of Rs 351.”Public sector oil marketing companies (OMCs) have reported that they are already marketing subsidised 5-kg cylinders up to 34 cylinders in a year per connection. The mini-LPG cylinder gives an option to people with small income to buy a refill at subsidised rate without having to shell out large sum of money. Also Read – Lanka launches ambitious tourism programme to woo Indian touristsHouseholds now have the option to buy 12 cylinders of 14.2-kg each at subsidised rate in a year or 34 bottles of 5-kg each at the below-market price per annum. Any requirement beyond that is to be met through purchase of cooking gas at market price – Rs 752 per 14.2-kg cylinder and Rs 351 per 5-kg bottle.  Pradhan said there was “no proposal under consideration of the government” to remove the subsidy on 14.2-kg cylinders after introduction of the mini-packs. Oil Ministry officials said consumers with regular LPG connection i.e. those who have enrolled themselves for cooking gas supply with a local distributor/dealer, can avail of either of 14.2-kg or 5-kg cylinders. For convenience of accounting, they will have to give a declaration of availing either of the two at the beginning of the year. Any consumer taking 14.2-kg cylinder cannot midway switch to 5-kg bottle and vice-a-versa. This is because the subsidy entitlement per household is fixed – 12 cylinders of 14.2-kg or 34 bottles of 5-kg each in a year. Midway chances may lead to accounting problems. Unregistered consumers can however avail of market priced 5-kg cylinders from petrol pump without much paper work. These cylinders are available off the shelf and consumers do not have to pre-book a refil or delivery. Pradhan pushes for oil pipeline from Siliguri to Bangla’s ParvatipurOil Minister Dharmendra Pradhan on Wednesday pushed for laying of a petroleum product pipeline from Siliguri to Parvatipur in Bangladesh for supply of fuel. Pradhan met Dr Tawfiq-e-Elahi Chowdhury, Energy Advisor to the Prime Minister of Bangladesh, to discuss the pipeline.‘Both sides discussed the need to greatly enhance cooperation in the oil and gas sector to the mutual benefit of people of the two countries,” an official statement said.last_img read more

Three held for blackmailing minor over objectionable pics

first_imgKolkata: Three persons, including a woman, were arrested by Tala police station on Thursday night, on charges of blackmailing a woman with some of her objectionable pictures. The victim, who was bent upon joining the profession of modelling, was lured by the trio to click such photographs.The three accused are Arunangshu Ghosh alias Saheb, Rituparna Saha and Jayabrata Roy. Police sources informed that Jayabrata owns a dance school at Nilmani Mitra Lane in Tala area. The 16-year-old victim used to attend classes at the school. It was on April 17 when Jayabrata, along with two of his friends, lured her to take some objectionable pictures on the pretext of shooting for an advertisement. They also allegedly touched her private parts while taking the photographs. Also Read – Heavy rain hits traffic, flightsThe victim went back home and after some days, she was called again by the trio. When she refused to go, they started blackmailing her and threatened of circulating the photographs on social media.The girl then informed her uncle and then the trio started blackmailing the latter too. The victim lodged a complaint on April 21, following which the three were arrested. They were produced at Sealdah Court on Friday and were remanded to 14 days judicial custody.last_img read more

Over 5K participate in awareness drive against Thalassemia

first_imgKolkata: Over 5,000 people took part in a signature campaign as a part of the awareness drive against Thalassemia on World Thalassemia Day. The campaign was organised by Medical Bank. The signatories included people from all walks of life. Leaflets were distributed as a part of the campaign. Workshops and seminars were held on Thalassemia to celebrate the World Thalassemia Day.There are 40,000 Thalassemia patients in Bengal while the number of carriers will be over one lakh. There is no treatment for the disease and awareness is very important. The state government has over and again requested young people to get their blood tested before marriage to control spread of the disease. It is a well-known fact that Amitabh Bachchan is a Thalassemia carrier, while his spouse Jaya is not a carrier. Hence, none of their children Abhishek and Sweta are suffering from the disease. D Ashis, secretary of Medical Bank, said awareness to check the spread of the disease is important as the disease is fast growing. Thalassemia patients need blood and in summer when there is a crisis of blood or if they have negative blood group the problem is doubled.On the occasion, CM Mamata Banerjee tweeted: “Today is World Thalassaemia Day. My best wishes to all those fighting the disease: patients, doctors and caregivers.”last_img read more