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Samsung r478 Battery all-laptopbattery.com

Posté le 17/11/2017 à 16:33 - poster un commentaire

The team developed a prototype where bendy batteries are tucked into watch straps to supplement and provide "significantly improved" life to the main lithium ion battery.The ten researchers say, in a paper titled Software Defined Batteries (PDF) that the system is part hardware part software, the former offering granular control of power flowing through each battery thanks to "smart switching circuitry", and the latter being an element of the operating system that runs algorithms, policies, and APIs for increasing single charge-discharge duration and battery life."A growing range of battery chemistries are under development, each of which delivers a different set of benefits in terms of performance. We believe that combining multiple of these heterogeneous batteries instead of using a single battery chemistry can allow a mobile system to dynamically trade between their capabilities and thereby offer attractive tradeoffs. ...In current designs, the interactions between the OS and Power Management Integrated Circuit are limited to query operations, such as inquiring about remaining charge in the battery, terminal voltage or the cycle count … Through the SDB system, we propose enabling fine grain control over the behavior of hardware sub modules by exposing a richer software API to the OS to dynamically change the amount of charge to be drawn from or provided to each batteryies."

Users can login on a single device if it allows the web browser and the Sound-Proof app concurrent access to the phone microphone.The researchers say the platform can also be used as a form of continuous authentication, and sports brute-force rate limiting and maintains logs of login attempts.Pic Google’s Chromebooks are just over four year old and, while the hardware has done well in education, businesses and normal people haven’t been too keen.In response, the ad giant has teamed up with Dell to fix this with a line of Chromebooks for business. Rajen Sheth, director of product management for Android and Chrome for Business and Education, said that with businesses updating from Windows XP, there’s an opportunity for Google to pick up some market share.“This is a long term move from legacy systems,” Kirk Schell, Dell’s GM for commercial client solutions, told a press conference in San Francisco on Thursday. “It’s going to be a long process, which is why you’ll see Google apps running alongside legacy apps via virtualization.”

The Dell Chromebook 13 (for the size, not for luck) is a carbon fiber and magalloy machine that has the look of a premium laptop and weighs in at a reasonably portable 3.23lb, with the touchscreen adding a third of a pound to that. The device has seven configurations, ranging between $399 and $899 in price, and runs Intel Celeron, Core i3 and Core i5 processors, 2, 4 or 8GB of RAM, and either a 16 or 32GB SSD.The laptops have two USB ports (one version 2.0 and one 3.0), an HDMI socket, and a microSD card for removable storage. It runs 801.11AC Wi-Fi, Bluetooth, and has a variety of add-on dongles for Ethernet and serial ports.The battery life is a claimed 12 hours minimum, and that’s on the base-spec model, Schell said. The devices go on sale on September 17 from Dell and Google’s online shop.The hardware is all well and good, but in order to convince businesses to dump Windows machines and go to ChromeOS, Google and Dell have focused on software.The Chromebook 13s have been set up to run Windows and legacy apps via VMWare, Dell vWorkspace, or Citrix’s Chrome receiver. For storage, considering the piddling size of the hard disk, there’s Google Drive, of course, but also support for Box, Dropbox, or OneDrive.

Google and Dell are also selling this on the basis of easy IT management. A central console allows administrators to control the rollout of operating system updates, security protocols, passwords, and user interface changes on a company-wide, workgroup, or individual basis.The simplified IT management structure of the ChromeOS is how Google sold these systems from the beginning, and while it isn’t perfect, it’s still a hell of a lot easier (and less expensive) to manage a Chromebook fleet rather than a swathe of Windows beige boxes and laptops.One of the traditional weaknesses of Chromebooks is their distressing tendency to become mostly useless when out of range of an internet connection. Sheth said that this too had been addressed by the latest builds of the ChromeOS.“We’re seeing a good amount of sophistication in offline use of web apps,” he explained. “Google apps are all available offline by default on these devices, and we’re seeing many other web apps working on that too. Also we have android apps now being able to be ported to Chromebooks, and a lot of those are designed to be inherently offline.”El Reg will be getting one of the new systems in for review. The new laptop looks all right, with a few caveats.

Certainly, it looks good enough to take into a pitch meeting and the connectivity is fine. The keyboard is frankly a bit small compared to something like the higher-end Pixel model, but it's still usable.It remains to be seen how companies are going to find the software side of things. No doubt many companies are sick to the back teeth of Windows, but moving across to Google is a serious shift that some may balk at. Exclusive EE failed to label its "Power Bar" phone charging devices with the correct marking to show that the product complied with European safety directives, The Register has learned.The embarrassing cockup comes after we revealed that EE management had been warned about safety risks with its Power Bar, ahead of its launch in April this year. Since then, 1.5 million such devices have been dished out for free to the company's customers – but a recall affecting hundreds of thousands of units is now under way, after a Power Bar exploded, injuring a 26-year-old medical student.Late last month, Katy Emslie suffered burns to her hands and spent five hours in A&E and had plastic/re-constructive treatment after her Power Bar, which was charging from her laptop, blew up in the middle of the night while she slept.

That incident eventually prompted EE to recall around 500,000 Power Bars. The UK's largest mobile operator said that only some of its chargers posed a potential fire risk and blamed a faulty batch of models labelled "E1-06."El Reg saw internal documents that made it clear that serious safety concerns regarding the Power Bar had been raised at the company before the device was launched. However, when EE was quizzed by us, it had this to say:"We strongly refute any suggestion that safety concerns were ignored or dismissed without careful consideration. The product was subject to a rigorous testing process by our safety and products teams, and all EE Power Bars meet EC electrical safety standards."Now, it has come to The Register's attention that the CE marking (which stands for European Conformity) affixed to the device doesn't adhere to the specific European Union rules.Those measures detail the required layout of the CE marking, but we've discovered that EE failed to comply. Furthermore, we're told that the labelling cockup has been spotted on batches of the device that haven't been recalled.

Worse still, EE was first told about the dodgy CE marking back in April – not long after the product was launched as part of a big marketing blitz.EE had promised "never-ending power" for its millions of customers by offering them free Power Bars, which – prior to the programme being mothballed following the recall – allowed them to collect the chargers from the company's retail outlets. The devices could then later be returned to be recharged, swapping for a freshly-charged Bar.Early in the project, EE carried out a risk review through its own safety and sustainability team. It claimed risks had been assessed and that the product met legal requirements, including European battery regulations. But it is unclear how detailed that exercise was.Specific concerns raised within EE in the documents seen by The Register included variable quality in the cells used in manufacture, a risk that the Power Bar could easily be overloaded and catch fire if used with a faulty cable, lack of measures to ensure that Power Bars circulating among EE's users and shops would remain within their safe lifespan, a risk that bars being charged en masse in shops might suffer "thermal runaway" and burn down buildings, and other dangers.

In light of those serious safety concerns, EE will undoubtedly be red-faced about this latest blunder with its controversial Power Bar devices.El Reg pressed the mobile carrier for answers about its CE marking gaffe. We asked the company if it would let us take a look at the so-called "Declaration of Conformity" paperwork for the Power Bar, which would have been required to be created prior to any CE marking being applied to the product.However, EE declined to provide us with that information. It also failed to explain how the labelling error had occurred in the first place. Why, for example, was it not spotted during the operator's "rigorous testing process"?The UK government has warned firms of the pitfalls of slapping inaccurate CE markings on products. It said:If an enforcement body finds your product does not meet CE marking requirements, they will often provide you with an opportunity to ensure it is correctly CE marked.If you fail to comply with this, you will be obliged to take your product off the market. You may also be liable for a fine and imprisonment.

An EE Power Bar with the wrong CE marking from a different batch to those models that have been recalled. Pic credit: Joseph Heenan It's also worth noting that the so-called "Chinese Export" marking – which some people attribute to products manufactured in China – is about as real as the existence of a unicorn, as this response from the European Commission explained back in 2008.Analysis Lenovo has sold laptops bundled with unremovable software that features a bonus exploitable security vulnerability. If the crapware is deleted, or the hard drive wiped and Windows reinstalled from scratch, the laptop's firmware will quietly and automatically reinstall Lenovo's software on the next boot-up.Built into the firmware on the laptops' motherboard is a piece of code called the Lenovo Service Engine (LSE). If Windows is installed, the LSE is executed before the Microsoft operating system is launched.The LSE makes sure C:\Windows\system32\autochk.exe is Lenovo's variant of the autochk.exe file; if Microsoft's official version is there, it is moved out of the way and replaced. The executable is run during startup, and is supposed to check the computer's file system to make sure it's free of any corruption.

Lenovo's variant of this system file ensures LenovoUpdate.exe and LenovoCheck.exe are present in the operating system's system32 directory, and if not, it will copy the executables into that directory during boot up. So if you uninstall or delete these programs, the LSE in the firmware will bring them back during the next power-on or reboot.LenovoCheck and LenovoUpdate are executed on startup with full administrator access. Automatically, and rather rudely, they connect to the internet to download and install drivers, a system "optimizer", and whatever else Lenovo wants on your computer. Lenovo's software also phones home to the Chinese giant details of the running system.To pull this off, the LSE exploits Microsoft's Windows Platform Binary Table (WPBT) feature. This allows PC manufacturers and corporate IT to inject drivers, programs and other files into the Windows operating system from the motherboard firmware.


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