The Nissan Leaf all-electric prototype shown off recently has 107 horsepower and accelerates quickly and silently, reaching up to 90 miles an hour, and offering a 100 mile driving range. It has all the comforts expected in today’s cars, including cruise control, air conditioning, stereo sound system, and a navigation system that points you to the nearest public charging stations. The Leaf also has a built-in charger with a timer that lets you decide when it is charged. Most owners are expected to charge the 24 kWh battery overnight at their own home. A full recharge will take 16 hours at voltages available in the US, but public fast-charging stations with high-voltage plugs will be able to recharge the battery in just 30 minutes. More information: Nissan Leaf website — www.nissanusa.com/leaf-electric-car/#/car/index © 2009 PhysOrg.com Meanwhile Toyota has announced plans to market large numbers of a plug-in Prius hybrid in late 2011. Its range will be much less than the Leaf, at only 14.5 miles, but unlike the Leaf, it is not all-electric, which will be an advantage until charging stations become widespread enough that an all-electric car can go anywhere. Toyota says the hybrid will be extremely economical to run, at 134 mpg. The 5.2 kWh lithium ion battery pack recharge time will be much faster than for the Leaf. Charging stations are beginning to appear in the US. Director of Product Planning for Nissan in North America, Mark Perry, points out that 2,500 public charging stations will be built around Seattle, and there will soon be a station within five miles of anywhere in the Puget Sound region. Charging stations will also be built elsewhere in the US in the near future.Battery technology is also improving, and the ideal battery for electric cars would give the car a long range, while producing minimal waste when it comes to the end of its life. The battery in the Nissan Leaf uses LiMn chemistry, and is expected to last 10 years, after which it can be recycled.Nissan will be taking orders for the Leaf starting in spring, 2010, and the car is expected to retail at around $32,000. Toyota’s plug-in vehicle should be widely available in 2011, probably for under $30,000, and General Motors will have the Chevy Volt plug-in hybrid available in 2011 at a price tag of about $40,000. Tesla already has its own electric cars with a 313 mile range, and more affordable cars than the Roadster are planned. Ford and Mitsubishi are also planning to offer electric cars in the near future.Electric cars have zero emissions and in the US are eligible for tax credits, which can be as much as $7,500. Nissan’s new concept car ‘feels like flying’ (w/ Video) 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. Nissan Leaf (PhysOrg.com) — Electric vehicles are far from new, but we are still a long way from electric cars being the norm. Now two new electric cars may bring that goal a step closer. Toyota Prius plug-in hybrid Citation: Electric cars rolling out (2009, December 16) retrieved 18 August 2019 from https://phys.org/news/2009-12-electric-cars.html Explore further
Miller claims to have figured out the security breach by examining a firmware upgrade Apple sent out in 2009. Being able to breach the firmware in the chip means he can alter settings such as those that monitor the battery and the interface between it and the operating system. Miller says he’s “bricked” or killed the batteries in seven laptops, presumably to prove that it wasn’t a fluke, and believes if he wanted to, he could cause the batteries to ignite or even blow up, though that is still debatable as the batteries themselves come with a fuse to prevent such an occurrence.Miller says he’s found he can hack into MacBooks, MacBook Pros and MacBook Airs, and says he’s notified both Apple and chip maker Texas Instruments of his findings, but says he hasn’t heard anything back from them. He also says that he believes this vulnerability is particularly insidious because if a hacker did manage to breach the battery firmware and implant malware, the user of the computer, upon discovering something wrong, wouldn’t be able to eradicate it unless he or she thought to remove the battery, not something most would think of right off the bat. It should be noted here that just because a hacker gets into the battery chip, that doesn’t mean they’ve got a clear shot to the operating system and the rest of the computer. Chipmakers do add additional security measures to their chips so a hacker would have to be able to hack that part as well in order to embed malware that could do other things besides just mess with the battery.Miller also says he’s developed a “fix” for the problem, a patch that will change the password on the firmware to a random number, though users who apply it will no longer be able to get firmware upgrades from Apple.While this discovery by Miller does indeed highlight a serious vulnerability, it’s not like it’s one that is confined to just Mac laptops or even laptops in general. Most computers have several chips in them with programmable firmware, protected only by simple passwords, and their vulnerabilities are well documented. What’s truly interesting is that more hackers aren’t trying to sneak in via this approach; though no doubt Miller’s presentation will serve as a reminder to those with nefarious intent who may have forgotten about such vulnerabilities or simply haven’t been paying attention. Home-computer users at risk due to use of ‘folk model’ security Explore further (PhysOrg.com) — Research consultant Charlie Miller, currently with Accuvant Labs, has made it known that he intends to demonstrate a security hole in certain Mac laptops at next month’s Black Hat security conference. In an interview with Forbes, he says the chip that controls the battery can be hacked because Apple uses only two passwords for the firmware for all of their laptops, which he says he’s been able to figure out, which of course means, others with less noble purpose could do it as well. Citation: Security researcher finds hack vulnerability in Mac battery chips (2011, July 26) retrieved 18 August 2019 from https://phys.org/news/2011-07-hack-vulnerability-mac-battery-chips.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. © 2010 PhysOrg.com
(Phys.org) — A lithium-ion battery that can charge 120 times faster than normal is reportedly the work of scientists from Korea at the Ulsan National Institute of Science and Technology (UNIST) The scientists lay claim to a technology that enables a recharge 30 to 120 times faster than conventional li-ion batteries, according to the Korean news agency, Yonhap. The scientists in South Korea believe their process will cut the time down to a matter of minutes—tackling head-on a key issue with rechargeable batteries, the time they take to recharge. Their method makes use of cathode material, standard lithium manganese oxide (LMO), soaked in a solution containing graphite. By carbonizing the graphite-soaked LMO, the graphite turns into a network of conductive traces that run throughout the cathode. These carbonized graphite networks allow all parts of the battery to recharge at the same time. Therein lies the speed-up. The cathode is packaged with an electrolyte and graphite anode to create the fast-charging battery. The key feature is that all energy-holding particles of the new battery start recharging simultaneously, in contrast to what takes place in conventional batteries, with the same particles recharging in order from the outermost particles to the innermost.Their work has been praised in its implications for hoped-for EV adoptions. “The development of such a battery could significantly raise the popularity of electric vehicles whose lithium-ion batteries currently take hours to recharge,” according to the Ministry of Education, Science and Technology.Although electric vehicles promise more efficiency than gasoline and diesel-powered cars, the idea of spending two hours recharging a lithium ion battery has been seen as an inconvenience, and the time factor claimed by the scientists will obviously be seen with interest.All the same, cost will remain another barrier. According to observers, the time convenience does not address the pricetag inconvenience. Li-ion battery packs are expensive; the carbonized LMO battery developed by the researchers is not expected to carry a much lower price than what is available now. The researchers’ paper, “Carbon-Coated Single-Crystal LiMn2O4 Nanoparticle Clusters as Cathode Material for High-Energy and High-Power Lithium-Ion Batteries,” was published earlier this month in Angewandte Chemie. Authors are Sanghan Lee, Yonghyun Cho, Prof. Hyun-Kon Song, Prof. Kyu Tae Lee, and Prof. Jaephil Cho. The researchers were supported by the Converging Research Center Program through the Ministry of Education, Science and Technology. Fast-recharge ‘3D’ lithium-ion battery prototype could be perfect for electric cars © 2012 Phys.Org Explore further Citation: Lithium-ion battery is fast-charged in minutes (2012, August 17) retrieved 18 August 2019 from https://phys.org/news/2012-08-lithium-ion-battery-fast-charged-minutes.html Journal information: Angewandte Chemie 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: DOI: 10.1002/ange.201203581
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 Play SI Video S4 from Walking like an ant: a quantitative and experimental approach to understanding locomotor mimicry in the jumping spider Myrmarachne formicaria, DOI: 10.1098/rspb.2017.0308 The team also captured sample spiders and studied them in the lab—close-up, high-speed video revealed that the spiders lifted their front two legs periodically as they walked, just often enough to confuse prey into believing that the legs were antennae, mimicking ant behavior. To test how well the behavior worked, the researchers placed predators in with the spiders and recorded the action. They found that the predators attacked the spiders less often than they attacked regular jumping spiders—but about just as often as they attacked real ants. This, the researchers suggest, indicates that the mimicry by the spiders is quite effective. More information: Paul S. Shamble et al. Walking like an ant: a quantitative and experimental approach to understanding locomotor mimicry in the jumping spider Myrmarachne formicaria, Proceedings of the Royal Society B: Biological Sciences (2017). DOI: 10.1098/rspb.2017.0308AbstractProtective mimicry, in which a palatable species avoids predation by being mistaken for an unpalatable model, is a remarkable example of adaptive evolution. These complex interactions between mimics, models and predators can explain similarities between organisms beyond the often-mechanistic constraints typically invoked in studies of convergent evolution. However, quantitative studies of protective mimicry typically focus on static traits (e.g. colour and shape) rather than on dynamic traits like locomotion. Here, we use high-speed cameras and behavioural experiments to investigate the role of locomotor behaviour in mimicry by the ant-mimicking jumping spider Myrmarachne formicaria, comparing its movement to that of ants and non-mimicking spiders. Contrary to previous suggestions, we find mimics walk using all eight legs, raising their forelegs like ant antennae only when stationary. Mimics exhibited winding trajectories (typical wavelength = 5–10 body lengths), which resemble the winding patterns of ants specifically engaged in pheromone-trail following, although mimics walked on chemically inert surfaces. Mimics also make characteristically short (approx. 100 ms) pauses. Our analysis suggests that this makes mimics appear ant-like to observers with slow visual systems. Finally, behavioural experiments with predatory spiders yield results consistent with the protective mimicry hypothesis. These findings highlight the importance of dynamic behaviours and observer perception in mimicry. 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 Journal information: Proceedings of the Royal Society B As the researchers note, small spiders tend to fall prey to a wide variety of predators, and because of that, many have learned to behave in novel ways that help them survive. In this new effort, the researchers found that the spider Myrmarachne formicaria, which has evolved to resemble an ant, has also learned to mimic ant behavior to increase its chances of survival.Ants, the researchers also note, are a tough meal choice for many predators—some bite, some have chemical defenses and most are quite aggressive to boot. And if that is not enough to deter large spiders and other creatures from eating them, most ants belong to a nest with members that come to the aid of those under attack. It is no wonder that many creatures mimic them to avoid being eaten.To learn more about mimicry by the spiders, the researchers set up video cameras to capture them in action as they went about their lives in the wild. In so doing, they discovered that the spiders wander about on the ground in patterns very similar to those of ants—which do so because they follow a pheromone trail. Play SI Video S5 from Walking like an ant: a quantitative and experimental approach to understanding locomotor mimicry in the jumping spider Myrmarachne formicaria, DOI: 10.1098/rspb.2017.0308 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. © 2017 Phys.org Spiders disguise themselves as ants to hide and hunt their prey (Phys.org)—A small team of researchers at Cornell University has found that a certain species of spider raises its front legs periodically to mimic the look of antennae on ants. In their paper published in Proceedings of the Royal Society B, the group reports that the spider also walks in a zig-zap pattern similar to ants. Citation: Spider walks like an ant and raises front legs to mimic ant antenna (2017, July 12) retrieved 18 August 2019 from https://phys.org/news/2017-07-spider-ant-front-legs-mimic.html Gait analysis. (a) Images of an M. formicaria female (left) and a male (centre, right) showing the antennal illusion behaviour where the forelegs are elevated similar to ant antennae. A head-on view (right) showing the large anterior median eyes characteristic of jumping spiders. (b) The ends of appendages were tracked over multiple strides based on top-view high-speed videos. Tracking results from a single trial, superimposed over the animal silhouette in the reference frame of the animal. (c) The typical gaits of non-mimetic jumping spiders (left), mimetic M. formacaria (centre) and ants (right). Line style (dotted or solid) illustrates legs that move in-phase; these two sets then move in anti-phase. (d) Appendage positions plotted, forward/backward relative to the mean position over multiple strides. Colours indicate appendages on the left/right side of the body; dotted and solid lines as in (c). Non-mimetic jumping spiders show the typical alternating tetrapod gait and when stationary (grey zone) do not move their legs. Ants use an alternating tripod gait, with no clear phase relationship between antennae and legs. Ant mimics walk like typical jumping spiders (highlighted in green), but when stationary its forelegs move into phase with one another, similar to ant antennae (shown in red). Credit: Proceedings of the Royal Society B: Biological Sciences (2017). DOI: 10.1098/rspb.2017.0308
Read about the latest research published in Psychological Science: Selection of Visual Objects in Perception and Working Memory One at a TimeNina Thigpen, Nathan M. Petro, Jessica Oschwald, Klaus Oberauer, and Andreas Keil What the Future Holds and When: A Description–Experience Gap in Intertemporal ChoiceJunyi Dai, Thorsten Pachur, Timothy J. Pleskac, and Ralph Hertwig Do people prefer to choose a reward with a known delay or a reward with different possible delays? Across two studies, participants imagined that they had won some prize money and chose between different payout schedules. They could choose between a sure-timing option (e.g., a 100% probability of getting paid in 2 months) and a timing lottery, in which the payment was certain but the schedule was uncertain (e.g., a 90% probability of getting paid in 1 month or a 10% probability of getting paid in 11 months). The payment schedules included different percentages of short and long delays and were either explicitly described or learned by sampling different payout schedules from a set of choices (i.e., experiential sampling). When the schedules were described, participants chose the sure-timing option more frequently when the longer delay was rare than when the shorter delay was rare. In contrast, when the schedules were learned through experience, the sure-timing option was chosen more frequently when the shorter delay was rare. Participants also chose the sure-timing option more frequently when the prize was larger than when it was smaller, but only when the schedules were described. Data indicated that participants overweighted rare events more often when the schedules were described than when they were learned. These results were not solely due to sampling errors and misestimates of schedules when those were learned. These findings suggest that how people weigh information when choosing a payment schedule might depend on the degree to which certainty in the timing is presented in the schedule for receiving a reward. How does the information held in working memory influence how we process the visual environment? Thigpen and colleagues examined the steady-state visual evoked potential (SSVEP), an electroencephalographic (EEG) measure of visuocortical activation, in response to visual stimuli matching or mismatching information in working memory. Participants memorized the orientation of two grids and, immediately after, saw two new grids (probes). Their task was to indicate whether one of the new grids matched one of the initial grids. Several trials of this task were completed while EEG data were continuously recorded. Matching probes increased the visuocortical response, whereas mismatching probes suppressed it. These results suggest that the visual cortex prioritizes attentional selection of stimuli with features relevant to the information in working memory at the expense of stimuli that do not match the information in working memory. Further, when two probes matched participants’ working memory contents simultaneously, visuocortical activation alternated between the two probes, indicating that the attentional sampling of the features in working memory is done serially, one item at a time. This pattern of results also occurred when the probes were not relevant to the memorization task because participants had to rotate them to match the initial grids. This suggests that the content of working memory can guide perceptual attention, even toward irrelevant stimuli.
Anton Chekhov, naam to suna hoga. If yes, here is your treat and if no, grab chance to learn and watch him unfold on the Capital stage. Presented by Curtain Call productions, titled On The Go, the play is a blend of short stories written by the legendary author and is directed by Vishesh Arora.‘I was mulling over doing a play based on short stories for long and then finally settled on Chekhov since he is the best amongst all contemprary short story writers. It required a lot of effort in terms of finding good actors and conceptualising to execution of the play, which all happened in less than a month,’ said Arora. ‘The striking part is that the stories I have shortlisted are all a mix of many genres like satire, comdey and romance. Also Read – ‘Playing Jojo was emotionally exhausting’It prefectly mirrors the image of our Indian society in current times. Plus the elements like lighting and costumes have to be taken care of since we are putting up a particular era of Russian society,’ he added.The stories which are to performed include- The Boor (also known as The Bear), The Lottery Ticket and A Marriage Proposal.While The Boor revolves around the fickleness of feelings and commitment. And explores the ironies of life which could happen to anybody in life, The Lottery Ticket is based on how money can alter relationships and A Marriage Proposal explores the process of getting married and is a satire on the upper middle class and process of courtship. Also Read – Leslie doing new comedy special with NetflixThe play points out the struggle to balance the economic necessities of marriage and what the characters actually want. Manil Mayank Mishra who essays the role of Mr Smirnov in The Boor says, ‘My character is of a protagonist who has a covert emotional side to him. But since he shares a tragic past his belief in love and commitment is shattered. He keeps himself occupied and engrossed with the practical world…To fit into the character I had to refer videos and books based on Russian culture and then portray them on stage.’
Siliguri: The first phase of ‘Bhorer Alo’, the mega tourism hub of the state Tourism department, will be inaugurated soon.”The first phase of the project is almost ready and will be inaugurated once Chief Minister Mamata Banerjee gives her consent,” said Goutam Deb, state Tourism minister, at Gajoldoba after holding a review meeting just ahead of the CM’s visit with the officials of different government departments.The project is coming up on an estimated 208-acre of land, located 25 km from Siliguri on the banks of river Teesta. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killed”I will discuss about the rehabilitation of 47 roadside shops and preparation of different kiosks for them so that they can carry on with their business well. We will also beautify the place by setting up a small garden there and provide them with water as well as electricity,” said Deb.Deb also mentioned that ahead of Durga Puja, the department will introduce elephant safari and jungle trail on cycling, boating with safety gears for tourists and cottages.
Kolkata: The Calcutta High Court today directed the release of original educational documents of two post graduate medical students, whose papers were allegedly withheld by the West Bengal government’s Health department. The petitioners, who moved two different bench of the high court, alleged that despite agreeing to pay the requisite bond amount of Rs 10 lakh and Rs 20 lakh respectively, they were denied of their original documents. Petitioner Debashish Bhattacharya, who studied at the Bankura Sammilani Medical College, moved the court claiming that the Health department was not releasing his original documents which he needed for pursuing higher studies. Also Read – 2 Group D staffers held for ‘assaulting’ minors A division bench, comprising Chief Justice J Bhattacharya and Justice A Banerjee, directed that the state health secretary must ensure the release of all original documents upon payment of Rs 10 lakh as per the bond agreement of July 31, 2013. The court directed the principal of the college to produce the documents before the court, which would then be handed over to the petitioner. In another petition, Assam resident Anurag Saha moved the court of Justice Arindam Sinha, seeking release of his documents related to his educational qualifications. Also Read – Naka checking to be stricter to rein in speed demons His counsel Kallol Bose, who also represented Debasish Bhattacharya in the other bench, submitted that he has been invited to join a hospital as a child specialist on July 19, but the state Health department was refusing to hand over his documents. This was despite his agreeing to pay the bond amount of Rs 20 lakh as per agreement of June 10, 2014. Justice Arindam Sinha directed the Health department to release and hand over Saha’s papers, who was attached to the B C Roy Child Hospital here, by July 18 on payment of the amount. The state Health department had in 2013 introduced a bond for post graduate students in its medical colleges making one year rural health service mandatory for them, which they could opt out upon payment of Rs 10 lakh. In 2014, the Health department increased the time period for compulsory rural health service from one year to three years. The government order had said that the medical students are to pay Rs 30 lakh, with a break up of Rs 10 lakh per year, if they choose to opt out of the three-year compulsory service in the rural hospitals in the state.
Darjeeling: “Bhorer Alo” in Jalpaiguri saw the light of day with Chief Minister Mamata Banerjee inaugurating the integrated development project on Wednesday which is billed to emerge as a major tourist attraction of this region.”I had seen this location at Gajoldoba while returning from Islampur in 2011. I was mesmerised by the beauty of the place with the river and the jungle. I had clicked photographs and later discussed the tourism potential of this place with state Finance minister Amit Mitra. This is how the project ‘Bhorer Alo’ was born,” stated the Chief Minister. Also Read – Rain batters Kolkata, cripples normal lifeSpread across a sprawling 210 acres of land, the project located at Gajoldoba around 20 km from Siliguri will include a bird sanctuary “Pakhibitan;” a jungle safari; sunset point; an orchid park; amphitheater; camping facility; jungle trek route; adventure cycling and boating facilities.It will also have a nine-hole golf course, star hotels along with tourist cottages. The Chief Minister emphasised on the need for strict and efficient administration of the project. She announced the bifurcation of the Jalpaiguri Sadar Sub-Division and to create a new Sub-Division comprising Gajoldoba area that will be administered by a Sub-Divisional Officer. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killed”The project will bring in investors and business. From the first day, we have to ensure that there is no land encroachment. Whosoever indulges in any such illegal activity will not be spared. CCTVs will have to be set up and all activities have to be recorded,” said the Chief Minister in a strong message.She also maintained that a police station will be set up in the project area and that from day one there will be strict policing.Banerjee also requested investors accompanying her to spread the word of an immense business potential of the project. “We have invested Rs 320 crore in this,” she said. The Chief Minister stated that the project would help develop the surrounding areas along with generating employment and creating a livelihood for many. “The locals need to cooperate. They have to understand that if the project grows, they will also grow along with it. There will be employment generation as well and the locals will get jobs and benefits,” stated Banerjee.A Biswa Bangla store will come up at Gajoldoba along with Banglar Haat. “2 acres of land will be given for Banglar Haat where local artisans will display and sell their products. Local artists will also perform daily at the Banglar Haat,” stated the Chief Minister. Stressing on connectivity, she stated that a new flyover and a road is being constructed to improve connectivity. “We will build a helipad too for better air connectivity,” remarked Banerjee.The Chief Minister also handed over life jackets to local boatmen and cycles to residents of neighbouring Saraswatipur Tea Estate. “25 boatmen will be given modern boats under the Jolodhara scheme,” stated Banerjee. The Chief Minister will be halting at “Bhorer Alo” for the night.