Tag: 上海狼族藏凤阁1314

Hyundai developed airbags that can handle multiple collisions

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first_imgEnlarge ImageGiven how long airbags have been around, it’s a little surprising it took someone until 2019 to figure out a multiple-collision solution. Hyundai According to Hyundai, three out of every 10 collisions involve secondary collisions with other objects. So Hyundai developed an airbag system that hopes to protect you beyond the first hit.Hyundai announced on Monday that it has developed and intends to commercialize a multi-collision airbag system, which the automaker claims is the first of its kind. In essence, it acts like a normal airbag, inflating to prevent injuries during a collision, but it’s unique in the sense that some airbags will deploy upon a second collision, as well.The tech depends on detecting movement of the occupants during and following the first collision. It can change the deployment strength of different airbags based on a person’s position, attempting to mitigate any potential injuries incurred in secondary crashes. “By improving airbag performance in multi-collision scenarios, we expect to significantly improve the safety of our drivers and passengers,” said Taesoo Chi, head of Hyundai Motor Group’s Chassis Technology Center, in a statement. “We will continue our research on more diverse crash situations as part of our commitment to producing even safer vehicles that protect occupants and prevent injuries.”According to Hyundai’s research, cars crossing the center line create the greatest opportunity for multi-stage collisions, followed by sudden stops at toll gates and sideswiping. The automaker didn’t say when this tech would reach production, only that it would eventually end up in both Hyundai and Kia vehicles, since the tech is too potentially important to relegate to a single half of Hyundai Motor Group. 2020 Hyundai Palisade SUV is big in Korea, and everywhere else 72 Photos Hyundai Kia Hyundai Tags Preview • 2020 Hyundai Palisade: Croc eyes, family-friendly SUV heart Comment 2020 BMW M340i review: A dash of M makes everything better More From Roadshowcenter_img 1 Share your voice Review • 2020 Hyundai Palisade review: Posh enough to make Genesis jealous News • 2020 Hyundai Palisade, Widebody Chargers and more: Roadshow’s week in review Auto Tech Future Cars 2020 Hyundai Palisade review: Posh enough to make Genesis jealous 2020 Kia Telluride review: Kia’s new SUV has big style and bigger value More about 2020 Hyundai Palisadelast_img read more

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Physics team finds new constraints on how lumpy spacetime can be

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first_img Gamma Ray Delay May Be Sign of ‘New Physics’ 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) — Robert Nemiroff and his colleagues at Michigan Technological University will be discussing new constraints on the so-called lumpiness of space-time at this year’s meeting of the American Astronomical Society. Image credit: NASA/Sonoma State University/Aurore Simonnet Nemiroff, also known for his Astronomy Pick of the Day site, has been studying photons that have been traveling through space for several billion years following a γ-ray burst that was recorded back in 1989. Called GRB 090510A, the burst let loose high energy photons that have been traveling through space at the speed of light; two of them are of special interest to physicists because they are believed to have left the same place at exactly the same time, which would seem to make them arrive here at exactly the same time as well. But, they won’t, due to the lumpiness of space-time and the long distance they have traveled. In the abstract for the presentation, the authors suggest that because a high-energy time scale for the photons detected from the gamma-ray burst have been found, a new upper limit is in place on the dependence of energy on speed and light as it’s dispersed across the universe.Studies of high energy photons traveling through space have already shown there are differences in actual speeds recorded, though they are very, very small; seven parts in a billion trillion, according to a previous study done by researchers at Yale. Because of this and other studied phenomenon, various researchers have theorized that space-time isn’t actually continues as it appears, but is instead made up of very, very tiny elements that are almost unbelievably small, on the order of a 10-35 (the Planck length). In such theories, photons that have the highest amount of energy also have wavelengths that are near to the Planck length. This makes them more apt to intermingle with so-called “lumps” which slows them down. The amount of slowdown is obviously very tiny, but as the photons travel so far for so long, the effect is amplified.In their study, Nemiroff et al, find due to measured differences in the arrival time of the two photons, that new constraints are in effect that impact the lump size of space-time. Because of this, the lumpiness of space-time only becomes meaningful when things are roughly 1/500 the Planck length, which could, obviously, put some limits on quantum gravity theories. More information: Nemiroff, R. J., Connolly, R., & Holmes, J. A New Limit on Lorentz Invariance and Chromatic Dispersion Across the Universe from GRB 090510A (American Astronomical Society, 2011)AbstractA high-energy, fast-variability time scale for Fermi-detected gamma-ray burst GRB 090510A is found that creates a new strictest upper limit on the energy dependence of the speed and dispersion of light across the universe. In particular, evidence is presented for variability at or below Δ t = 0.00136 for super-GeV photons, a factor of 10 more limiting than any time scale previously claimed for a GRB at GeV energies, including a previous limit reported by Abdo et al (2008). This variability derives from the duration of three separate closely-arriving photon groups prominent only in photon data above 1 GeV. One pulse pair has an energy difference of Δ E >/~ 23.5 GeV. Coupled with a redshift of z >/~ 0.897, the resulting limits on the differential speed of light and Lorentz invariance were found for a concordance cosmology. It was found that Δ c / c < 6.09 x 10-21, a limit consistent with, but slightly stronger than, a previous limit found for a GRB by Schaefer in 1999. Given a generic dispersion relation across the universe where the time delay is proportional to the photon energy to the first power, the variability translates into a dispersion strength of k1 < 1.38 x 10-5 sec Gpc-1 GeV-1. This limit results in an upper bound on dispersive effects created, for example, by dark energy, dark matter, or the spacetime foam of quantum gravity. This dispersion constraint also results in the most stringent lower limit yet claimed for the onset energy scale of quantum gravity: MQG c2 > 7.43 x 1021 GeV.via Nature Explore further Citation: Physics team finds new constraints on how lumpy space-time can be (2012, January 11) retrieved 18 August 2019 from https://phys.org/news/2012-01-physics-team-constraints-lumpy-space-time.html © 2011 PhysOrg.comlast_img read more

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Birdlike robot perches on a human hand w Video

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first_img A bird-like robot perches on a human hand. As shown in the video, the researchers performed flight tests starting with launching the robot by hand from a height of about 2.5 meters. During the 1.5-second-long flight, the robot’s speed decreases from 4.7 m/s to just under 2.5 m/s at the time of landing. As the robot glides to within a short distance of the hand target, it pitches up to a high angle of attack and then lands.As the engineers explain, the ability to hand perch represents a significant step toward designing flying robots capable of close interaction with humans. In the future, they plan to work on a go-around capability to accommodate failures during perching attempts.via: IEEE Spectrum Montage of snapshots taken from the video of a flight test showingperching on a hand. Image credit: A. Paranjape, et al. “We believe we have the first demonstration of autonomous/robotic flight of a bird-like micro aerial vehicle (MAV) perching on a human hand,” said project leader Soon-Jo Chung of the University of Illinois at Urbana-Champaign. A paper on the demonstration is under review for the IEEE Transactions on Robotics.Hand perching involves two phases. First, the robot has to maneuver while gliding in order to reach the desired position, which it achieves by reorienting its articulated wings. Second, it has to “pitch up” right before landing to briefly climb and quickly reduce its touchdown speed. (Phys.org) — Among the many challenges of designing flying robots is getting them to land gracefully. By taking a cue from birds, a team of engineers has developed a flapping-wing flying robot that can land by perching on a human hand. It’s a bird, it’s a plane, it’s a robot bird (w/ video) © 2012 Phys.Orgcenter_img Explore further More information: A. Paranjape, J. Kim, and S.-J. Chung. “Closed-Loop Perching of Aerial Robots with Articulated Flapping Wings,” IEEE Transactions on Robotics, under review, 2012. Pre-release paper here. 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: Bird-like robot perches on a human hand (w/ Video) (2012, May 3) retrieved 18 August 2019 from https://phys.org/news/2012-05-bird-like-robot-perches-human-video.htmllast_img read more

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Why Americans Dont Cheat on Their Taxes

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first_imgA more worrisome possibility is that tax morale has lagged behind declining trust, and will yet fall. High-profile tax-avoidance schemes—like those detailed in the so-called Panama Papers, or by The New York Times’s reporting on the Trump family’s tax dodges—could help erode morale. “Our sense of right and wrong is dramatically influenced by other people,” says Dan Ariely, a professor of psychology and behavioral economics at Duke. “If people think that the government is corrupt and not doing the right thing,” he told me, they may be more inclined to say, “Oh, I don’t want to pay money to a government that is misbehaving.” Read the whole story: The Atlantic If such a thing as American exceptionalism remains, maybe it can be found in this: Despite deep IRS budget cuts, an average audit rate that has plunged in recent years to just 0.6 percent, and a president who has bragged that dodging federal taxes is “smart,” most Americans still pay their income taxes every year. Even more remarkable, most of us feel obliged to pay. To quote the findings of a 2017 IRS survey: “The majority of Americans (88%) say it is not at all acceptable to cheat on taxes; this ethical attitude is not changing over time. —last_img read more

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Introducing Kweb A Kotlin library for building rich web applications

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first_imgKweb is a library using which you can easily build web applications in the Kotlin programming language. It basically eliminates the separation between browser and server from the programmer’s perspective. This means that events that only manipulate the DOM don’t need to do a server-roundtrip. As Kweb is written in Kotlin, users should have some familiarity with the Kotlin and Java ecosystem. Kweb allows you to keep all of the business logic in the server-side and enables the communication with the web browser through efficient websockets. To efficiently handle asynchronicity, it takes advantage of Kotlin’s powerful new coroutines mechanism. It also allows keeping consistent state across client and server by seamlessly conveying events between both. What are the features of Kweb? Makes the barrier between the web server and web browser mostly invisible to the programmer. Minimizes the server-browser chatter and browser rendering overhead. Supports integration with some powerful JavaScript libraries like Semantic, which is a UI framework designed for theming. Allows binding DOM elements in the browser directly to state on the server and automatically update them through the observer and data mapper patterns. Seamlessly integrates with Shoebox, a Kotlin library for persistent data storage that supports views and the observer pattern. Easily add to an existing project. Instantly update your web browser in response to code changes. The Kweb library is distributed via JitPack, a novel package repository for JVM and Android projects. Kweb takes advantage of the fact that in most web apps, logic occurs in the server side and the client can’t be trusted. This library is in its infancy but still works well enough to demonstrate that the approach is practical. You can read more about Kweb on its official website. Read Next Kotlin based framework, Ktor 1.0, released with features like sessions, metrics, call logging and more Kotlin 1.3 released with stable coroutines, multiplatform projects and more KotlinConf 2018: Kotlin 1.3 RC out and Kotlin/Native hits betalast_img read more

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Port of Montréal to see 12 increase in visitation this year

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first_imgPort of Montréal to see 12% increase in visitation this year Posted by Monday, May 7, 2018 Share Travelweek Group << Previous PostNext Post >> MONTREAL – Montreal is gearing up for an exceptionally busy cruise season, with an expected 27 ships, 19 cruise lines and 130,000 passengers and crew members making a total of 90 stops on its shores.As such, in 2018 Port of Montréal will see a 12% increase in visitation over last season, increasingly standing out as a starting or ending point for cruises. Four different companies are offering Montreal-to-Montreal itineraries via Saint-Pierre-et-Miquelon or the Great Lakes. The city will also be the departure port for 20 cruises headed to Boston, 16 cruises to New York, 16 cruises to the Magdalen Islands and six cruises to Florida, as well as cruises to the Great Lakes, Europe (U.K. and Germany) and Cuba.“For several years, we have been actively working to develop the cruise sector, which is growing dramatically around the world. Quebeckers will increasingly find it easier to book cruises leaving from Montréal and enjoy the city’s various attractions, including its fine food establishments and hotels for every taste,” said Yves Lalumière, President and CEO of Tourisme Montréal.More news:  Visit Orlando unveils new travel trade tools & agent perksThe season will continue right through to November 2, when Oceania Cruises’ Insignia departs. Between now and then, Montréal will welcome six new ships, including the M/S Jacques Cartier (Croisières Jacques-Cartier, a Québec firm), the Victory II (Victory Cruise Lines), the AIDAvita (AIDA Cruises), the Star Pride (Windstar Cruises), the Silver Spirit and the Silver Wind (Silversea Cruises).Last year, Port of Montréal inaugurated a new cruise terminal and this year will open three public areas on the port’s Grand Quai, which will shape the new identity for the Alexandra Pier.To see all scheduled arrivals and departures for 2018, go to http://cruises.alamontreal.com/cruises-in-montreal/.last_img read more

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